/* $OpenBSD: switchofp.c,v 1.60 2017/03/01 09:32:07 mpi Exp $ */ /* * Copyright (c) 2016 Kazuya GODA * Copyright (c) 2015, 2016 YASUOKA Masahiko * Copyright (c) 2015, 2016 Reyk Floeter * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #include "bpfilter.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #if NBPFILTER > 0 #include #endif /* * Per-frame debugging can be done at any time using the BPF * hook of DLT_OPENFLOW (eg. tcpdump -y openflow -i switch0) */ #ifdef DEBUG #define DPRINTF(__sc, ...) \ do { \ struct switch_softc *_sc = __sc; \ log(LOG_DEBUG, "%s: ", _sc->sc_if.if_xname); \ addlog(__VA_ARGS__); \ } while(/*CONSTCOND*/0) #else #define DPRINTF(__sc, ...) do {} while(0) #endif struct swofp_flow_entry { uint64_t swfe_cookie; uint16_t swfe_priority; uint8_t swfe_table_id; struct ofp_match *swfe_match; LIST_ENTRY(swofp_flow_entry) swfe_next; uint64_t swfe_packet_cnt; uint64_t swfe_byte_cnt; struct ofp_instruction_goto_table *swfe_goto_table; struct ofp_instruction_write_metadata *swfe_write_metadata; struct ofp_instruction_actions *swfe_write_actions; struct ofp_instruction_actions *swfe_apply_actions; struct ofp_instruction_actions *swfe_clear_actions; struct ofp_instruction_meter *swfe_meter; struct ofp_instruction_experimenter *swfe_experimenter; struct timespec swfe_installed_time; struct timespec swfe_idle_time; uint16_t swfe_idle_timeout; uint16_t swfe_hard_timeout; uint16_t swfe_flags; int swfe_tablemiss; }; struct swofp_flow_table { uint32_t swft_table_id; TAILQ_ENTRY(swofp_flow_table) swft_table_next; uint64_t swft_lookup_count; uint64_t swft_matched_count; LIST_HEAD(, swofp_flow_entry) swft_flow_list; uint32_t swft_flow_num; }; struct swofp_group_entry { uint32_t swge_group_id; LIST_ENTRY(swofp_group_entry) swge_next; uint64_t swge_packet_count; uint64_t swge_byte_count; uint32_t swge_ref_count; uint8_t swge_type; uint32_t swge_buckets_len; struct ofp_bucket *swge_buckets; struct ofp_bucket_counter *swge_bucket_counter; /* XXX */ struct timespec swge_installed_time; }; struct swofp_action_set { uint16_t swas_type; struct ofp_action_header *swas_action; }; /* Same as total number of OFP_ACTION_ */ #define SWOFP_ACTION_SET_MAX 18 struct swofp_pipeline_desc { uint32_t swpld_table_id; uint64_t swpld_cookie; uint64_t swpld_metadata; struct switch_flow_classify *swpld_swfcl; struct switch_flow_classify swpld_pre_swfcl; struct switch_fwdp_queue swpld_fwdp_q; struct swofp_action_set swpld_action_set[SWOFP_ACTION_SET_MAX]; struct ofp_action_header *swpld_set_fields[OFP_XM_T_MAX]; int swpld_tablemiss; }; struct swofp_ofs { /* There are parameters by OpenFlow */ uint32_t swofs_xidnxt; uint64_t swofs_datapath_id; struct ofp_switch_config swofs_switch_config; struct timeout swofs_flow_timeout; uint32_t swofs_flow_max_entry; TAILQ_HEAD(, swofp_flow_table) swofs_table_list; uint32_t swofs_group_max_table; int swofs_group_table_num; LIST_HEAD(, swofp_group_entry) swofs_group_table; int (*swofp_cp_init)(struct switch_softc *); }; struct swofp_mpmsg { struct mbuf *swmp_hdr; struct mbuf_list swmp_body; }; #define SWOFP_MPMSG_MAX 0xffef typedef int (*ofp_msg_handler)(struct switch_softc *, struct mbuf *); void swofp_forward_ofs(struct switch_softc *, struct switch_flow_classify *, struct mbuf *); int swofp_input(struct switch_softc *, struct mbuf *); int swofp_output(struct switch_softc *, struct mbuf *); void swofp_timer(void *); struct ofp_oxm_class *swofp_lookup_oxm_handler(struct ofp_ox_match *); ofp_msg_handler swofp_lookup_msg_handler(uint8_t); ofp_msg_handler swofp_lookup_mpmsg_handler(uint16_t); struct ofp_action_handler *swofp_lookup_action_handler(uint16_t); ofp_msg_handler *swofp_flow_mod_lookup_handler(uint8_t); struct swofp_pipeline_desc *swofp_pipeline_desc_create(struct switch_flow_classify *); void swofp_pipeline_desc_destroy(struct swofp_pipeline_desc *); int swofp_flow_match_by_swfcl(struct ofp_match *, struct switch_flow_classify *); struct swofp_flow_entry *swofp_flow_lookup(struct swofp_flow_table *, struct switch_flow_classify *); /* * Flow table */ struct swofp_flow_table *swofp_flow_table_lookup(struct switch_softc *, uint16_t); struct swofp_flow_table *swofp_flow_table_add(struct switch_softc *, uint16_t); int swofp_flow_table_delete(struct switch_softc *, uint16_t); void swofp_flow_table_delete_all(struct switch_softc *); void swofp_flow_delete_on_table_by_group(struct switch_softc *, struct swofp_flow_table *, uint32_t); void swofp_flow_delete_on_table(struct switch_softc *, struct swofp_flow_table *, struct ofp_match *, uint16_t, uint64_t, uint64_t cookie_mask, uint32_t, uint32_t, int); /* * Group table */ struct swofp_group_entry *swofp_group_entry_lookup(struct switch_softc *, uint32_t); int swofp_group_entry_add(struct switch_softc *, struct swofp_group_entry *); int swofp_group_entry_delete(struct switch_softc *, struct swofp_group_entry *); int swofp_group_entry_delete_all(struct switch_softc *); int swofp_validate_buckets(struct switch_softc *, struct mbuf *, uint8_t, uint16_t *, uint16_t *); /* * Flow entry */ int swofp_flow_entry_put_instructions(struct switch_softc *, struct mbuf *, struct swofp_flow_entry *, uint16_t *, uint16_t *); void swofp_flow_entry_instruction_free(struct swofp_flow_entry *); void swofp_flow_entry_free(struct swofp_flow_entry **); void swofp_flow_entry_add(struct switch_softc *, struct swofp_flow_table *, struct swofp_flow_entry *); void swofp_flow_entry_delete(struct switch_softc *, struct swofp_flow_table *, struct swofp_flow_entry *, uint8_t); int swofp_flow_mod_cmd_common_modify(struct switch_softc *, struct mbuf *, int ); int swofp_flow_cmp_non_strict(struct swofp_flow_entry *, struct ofp_match *); int swofp_flow_cmp_strict(struct swofp_flow_entry *, struct ofp_match *, uint32_t); int swofp_flow_cmp_common(struct swofp_flow_entry *, struct ofp_match *, int); struct swofp_flow_entry *swofp_flow_search_by_table(struct swofp_flow_table *, struct ofp_match *, uint16_t); int swofp_flow_has_group(struct ofp_instruction_actions *, uint32_t); int swofp_flow_filter_out_port(struct ofp_instruction_actions *, uint32_t); int swofp_flow_filter(struct swofp_flow_entry *, uint64_t, uint64_t, uint32_t, uint32_t); void swofp_flow_timeout(struct switch_softc *); int swofp_validate_oxm(struct ofp_ox_match *, uint16_t *); int swofp_validate_flow_match(struct ofp_match *, uint16_t *); int swofp_validate_flow_instruction(struct switch_softc *, struct ofp_instruction *, size_t, uint16_t *, uint16_t *); int swofp_validate_action(struct switch_softc *sc, struct ofp_action_header *, size_t, uint16_t *); /* * OpenFlow protocol compare oxm */ int swofp_ox_cmp_data(struct ofp_ox_match *, struct ofp_ox_match *, int); int swofp_ox_cmp_ipv6_addr(struct ofp_ox_match *, struct ofp_ox_match *, int); int swofp_ox_cmp_ipv4_addr(struct ofp_ox_match *, struct ofp_ox_match *, int); int swofp_ox_cmp_vlan_vid(struct ofp_ox_match *, struct ofp_ox_match *, int); int swofp_ox_cmp_ether_addr(struct ofp_ox_match *, struct ofp_ox_match *, int); /* * OpenFlow protocol match field handlers */ int swofp_ox_match_ether_addr(struct switch_flow_classify *, struct ofp_ox_match *); int swofp_ox_match_vlan_vid(struct switch_flow_classify *, struct ofp_ox_match *); int swofp_ox_match_ipv6_addr(struct switch_flow_classify *, struct ofp_ox_match *); int swofp_ox_match_ipv4_addr(struct switch_flow_classify *, struct ofp_ox_match *); int swofp_ox_match_uint8(struct switch_flow_classify *, struct ofp_ox_match *); int swofp_ox_match_uint16(struct switch_flow_classify *, struct ofp_ox_match *); int swofp_ox_match_uint32(struct switch_flow_classify *, struct ofp_ox_match *); int swofp_ox_match_uint64(struct switch_flow_classify *, struct ofp_ox_match *); void swofp_ox_match_put_start(struct ofp_match *); int swofp_ox_match_put_end(struct ofp_match *); int swofp_ox_match_put_uint32(struct ofp_match *, uint8_t, uint32_t); int swofp_ox_match_put_uint64(struct ofp_match *, uint8_t, uint64_t); int swofp_nx_match_put(struct ofp_match *, uint8_t, int, caddr_t); /* * OpenFlow protocol push/pop tag action handlers */ struct mbuf *swofp_action_push_vlan(struct switch_softc *, struct mbuf *, struct swofp_pipeline_desc *, struct ofp_action_header *); struct mbuf *swofp_action_pop_vlan(struct switch_softc *, struct mbuf *, struct swofp_pipeline_desc *, struct ofp_action_header *); struct mbuf *swofp_expand_8021q_tag(struct mbuf *); /* * OpenFlow protocol set field action handlers */ struct mbuf *swofp_apply_set_field_udp(struct mbuf *, int, struct switch_flow_classify *, struct switch_flow_classify *); struct mbuf *swofp_apply_set_field_tcp(struct mbuf *, int, struct switch_flow_classify *, struct switch_flow_classify *); struct mbuf *swofp_apply_set_field_nd6(struct mbuf *, int, struct switch_flow_classify *, struct switch_flow_classify *); struct mbuf *swofp_apply_set_field_icmpv6(struct mbuf *m, int, struct switch_flow_classify *, struct switch_flow_classify *); struct mbuf *swofp_apply_set_field_icmpv4(struct mbuf *, int, struct switch_flow_classify *, struct switch_flow_classify *); struct mbuf *swofp_apply_set_field_ipv6(struct mbuf *, int, struct switch_flow_classify *, struct switch_flow_classify *); struct mbuf *swofp_apply_set_field_ipv4(struct mbuf *, int, struct switch_flow_classify *, struct switch_flow_classify *); struct mbuf *swofp_apply_set_field_arp(struct mbuf *, int, struct switch_flow_classify *, struct switch_flow_classify *); struct mbuf *swofp_apply_set_field_ether(struct mbuf *, int, struct switch_flow_classify *, struct switch_flow_classify *); struct mbuf *swofp_apply_set_field_tunnel(struct mbuf *, int, struct switch_flow_classify *, struct switch_flow_classify *); struct mbuf *swofp_apply_set_field(struct mbuf *, struct swofp_pipeline_desc *); int swofp_ox_set_vlan_vid(struct switch_flow_classify *, struct ofp_ox_match *); int swofp_ox_set_uint8(struct switch_flow_classify *, struct ofp_ox_match *); int swofp_ox_set_uint16(struct switch_flow_classify *, struct ofp_ox_match *); int swofp_ox_set_uint32(struct switch_flow_classify *, struct ofp_ox_match *); int swofp_ox_set_uint64(struct switch_flow_classify *, struct ofp_ox_match *); int swofp_ox_set_ether_addr(struct switch_flow_classify *, struct ofp_ox_match *); int swofp_ox_set_ipv4_addr(struct switch_flow_classify *, struct ofp_ox_match *); int swofp_ox_set_ipv6_addr(struct switch_flow_classify *, struct ofp_ox_match *); /* * OpenFlow protocol execute action handlers */ int swofp_action_output_controller(struct switch_softc *, struct mbuf *, struct swofp_pipeline_desc *, uint16_t, uint8_t); struct mbuf *swofp_action_output(struct switch_softc *, struct mbuf *, struct swofp_pipeline_desc *, struct ofp_action_header *); struct mbuf *swofp_action_group_all(struct switch_softc *, struct mbuf *, struct swofp_pipeline_desc *, struct swofp_group_entry *); struct mbuf *swofp_action_group(struct switch_softc *, struct mbuf *, struct swofp_pipeline_desc *, struct ofp_action_header *); struct mbuf *swofp_action_set_field(struct switch_softc *, struct mbuf *, struct swofp_pipeline_desc *, struct ofp_action_header *); struct mbuf *swofp_execute_action(struct switch_softc *, struct mbuf *, struct swofp_pipeline_desc *, struct ofp_action_header *); struct mbuf *swofp_execute_action_set_field(struct switch_softc *, struct mbuf *, struct swofp_pipeline_desc *, struct ofp_action_header *); struct mbuf *swofp_execute_action_set(struct switch_softc *, struct mbuf *, struct swofp_pipeline_desc *); struct mbuf *swofp_apply_actions(struct switch_softc *, struct mbuf *, struct swofp_pipeline_desc *, struct ofp_instruction_actions *); struct swofp_action_set *swofp_lookup_action_set(struct swofp_pipeline_desc *, uint16_t); void swofp_write_actions_set_field(struct swofp_action_set *, struct ofp_action_header *); int swofp_write_actions(struct ofp_instruction_actions *, struct swofp_pipeline_desc *); void swofp_clear_actions_set_field(struct swofp_action_set *, struct ofp_action_header *); int swofp_clear_actions(struct ofp_instruction_actions *, struct swofp_pipeline_desc *); void swofp_write_metadata(struct ofp_instruction_write_metadata *, struct swofp_pipeline_desc *); /* * OpenFlow protocol message handlers */ void swofp_send_hello(struct switch_softc *); int swofp_recv_hello(struct switch_softc *, struct mbuf *); int swofp_send_echo(struct switch_softc *, struct mbuf *); int swofp_recv_echo(struct switch_softc *, struct mbuf *); void swofp_send_error(struct switch_softc *, struct mbuf *, uint16_t, uint16_t); int swofp_recv_features_req(struct switch_softc *, struct mbuf *); int swofp_recv_config_req(struct switch_softc *, struct mbuf *); int swofp_recv_set_config(struct switch_softc *, struct mbuf *); int swofp_send_flow_removed(struct switch_softc *, struct swofp_flow_entry *, uint8_t); int swofp_recv_packet_out(struct switch_softc *, struct mbuf *); int swofp_flow_mod_cmd_add(struct switch_softc *, struct mbuf *); int swofp_flow_mod_cmd_common_modify(struct switch_softc *, struct mbuf *, int); int swofp_flow_mod_cmd_modify(struct switch_softc *, struct mbuf *); int swofp_flow_mod_cmd_modify_strict(struct switch_softc *, struct mbuf *); int swofp_flow_mod_cmd_common_delete(struct switch_softc *, struct mbuf *, int); int swofp_flow_mod_cmd_delete(struct switch_softc *, struct mbuf *); int swofp_flow_mod_cmd_delete_strict(struct switch_softc *, struct mbuf *); int swofp_flow_mod(struct switch_softc *, struct mbuf *); int swofp_group_mod_add(struct switch_softc *, struct mbuf *); int swofp_group_mod_modify(struct switch_softc *, struct mbuf *); int swofp_group_mod_delete(struct switch_softc *, struct mbuf *); int swofp_group_mod(struct switch_softc *, struct mbuf *); int swofp_multipart_req(struct switch_softc *, struct mbuf *); int swofp_barrier_req(struct switch_softc *, struct mbuf *); void swofp_barrier_reply(struct switch_softc *, struct mbuf *); /* * OpenFlow protocol multipart message handlers */ int swofp_mpmsg_reply_create(struct ofp_multipart *, struct swofp_mpmsg *); int swofp_mpmsg_put(struct swofp_mpmsg *, caddr_t, size_t); int swofp_mpmsg_m_put(struct swofp_mpmsg *, struct mbuf *); void swofp_mpmsg_destroy(struct swofp_mpmsg *); int swofp_multipart_reply(struct switch_softc *, struct swofp_mpmsg *); int swofp_put_flow(struct mbuf *, struct swofp_flow_table *, struct swofp_flow_entry *); int swofp_put_flows_from_table(struct swofp_mpmsg *, struct swofp_flow_table *, struct ofp_flow_stats_request *); void swofp_aggregate_stat_from_table(struct ofp_aggregate_stats *, struct swofp_flow_table *, struct ofp_aggregate_stats_request *); int swofp_table_features_put_oxm(struct mbuf *, int *, uint16_t); int swofp_table_features_put_actions(struct mbuf *, int *, uint16_t); int swofp_table_features_put_instruction(struct mbuf *, int *, uint16_t); int swofp_mp_recv_desc(struct switch_softc *, struct mbuf *); int swofp_mp_recv_flow(struct switch_softc *, struct mbuf *); int swofp_mp_recv_aggregate_flow_stat(struct switch_softc *, struct mbuf *); int swofp_mp_recv_table_stats(struct switch_softc *, struct mbuf *); int swofp_mp_recv_table_features(struct switch_softc *, struct mbuf *); int swofp_mp_recv_port_stats(struct switch_softc *, struct mbuf *); int swofp_mp_recv_port_desc(struct switch_softc *, struct mbuf *); int swofp_mp_recv_group_desc(struct switch_softc *, struct mbuf *); #define OFP_ALIGNMENT 8 /* * OXM (OpenFlow Extensible Match) structures appear in ofp_match structure * and ofp_instruction_{apply|write}_action structure. */ #define OFP_OXM_FOREACH(hdr, len, curr) \ for ((curr) = (struct ofp_ox_match *)((caddr_t)(hdr) + sizeof(*hdr)); \ (caddr_t)(curr) < ((caddr_t)(hdr) + (len)); \ (curr) = (struct ofp_ox_match *)((caddr_t)(curr) + \ (curr)->oxm_length + sizeof(*curr))) #define OFP_OXM_TERMINATED(hdr, len, curr) \ (((caddr_t)(hdr) + (len)) <= (caddr_t)(curr)) #define OFP_ACTION_FOREACH(head, len, curr) \ /* struct ofp_action_header head, curr */ \ for ((curr) = (head); (caddr_t)curr < ((caddr_t)head + (len)); \ (curr) = (struct ofp_action_header *)((caddr_t)curr + \ ntohs((curr)->ah_len))) /* * Get instruction offset in ofp_flow_mod */ #define OFP_FLOW_MOD_MSG_INSTRUCTION_OFFSET(ofm) \ (offsetof(struct ofp_flow_mod, fm_match) + \ OFP_ALIGN(ntohs((ofm)->fm_match.om_length))) /* * Instructions "FOREACH" in ofp_flow_mod. You can get header using * OFP_FLOW_MOD_MSG_INSTRUCTION_PTR macro */ #define OFP_FLOW_MOD_INSTRUCTON_FOREACH(hadr, end, curr) \ for ((curr) = (head); (caddr_t)curr < ((caddr_t)head + (end)); \ (curr) = (struct ofp_instruction *)((caddr_t)(curr) + (curr)->i_len)) #define OFP_I_ACTIONS_FOREACH(head, curr) \ /* struct ofp_match head, struct ofp_ox_match curr */ \ for ((curr) = (struct ofp_action_header *)((caddr_t)head + sizeof(*head)); \ (caddr_t)curr < ((caddr_t)head + ntohs((head)->ia_len)); \ (curr) = (struct ofp_action_header *)((caddr_t)curr + \ ntohs((curr)->ah_len))) #define OFP_BUCKETS_FOREACH(head, end, curr) \ for ((curr) = (head); (caddr_t)curr < ((caddr_t)head + (end)); \ (curr) = (struct ofp_bucket *)((caddr_t)(curr) + ntohs((curr)->b_len))) /* * OpenFlow protocol message handlers */ struct ofp_msg_class { uint8_t msg_type; ofp_msg_handler msg_handler; }; struct ofp_msg_class ofp_msg_table[] = { { OFP_T_HELLO, swofp_recv_hello }, { OFP_T_ERROR, NULL /* unsupported */ }, { OFP_T_ECHO_REQUEST, swofp_recv_echo }, { OFP_T_ECHO_REPLY, NULL /* from switch */ }, { OFP_T_EXPERIMENTER, NULL /* unsupported */ }, { OFP_T_FEATURES_REQUEST, swofp_recv_features_req }, { OFP_T_FEATURES_REPLY, NULL /* from switch */ }, { OFP_T_GET_CONFIG_REQUEST, swofp_recv_config_req }, { OFP_T_GET_CONFIG_REPLY, NULL /* from switch */ }, { OFP_T_SET_CONFIG, swofp_recv_set_config }, { OFP_T_PACKET_IN, NULL /* from switch */ }, { OFP_T_FLOW_REMOVED, NULL /* from switch */ }, { OFP_T_PORT_STATUS, NULL /* from switch */ }, { OFP_T_PACKET_OUT, swofp_recv_packet_out }, { OFP_T_FLOW_MOD, swofp_flow_mod }, { OFP_T_GROUP_MOD, swofp_group_mod }, { OFP_T_PORT_MOD, NULL /* unsupported */ }, { OFP_T_TABLE_MOD, NULL /* unsupported */ }, { OFP_T_MULTIPART_REQUEST, swofp_multipart_req }, { OFP_T_MULTIPART_REPLY, NULL /* from switch */ }, { OFP_T_BARRIER_REQUEST, swofp_barrier_req }, { OFP_T_BARRIER_REPLY, NULL /* from switch */ }, { OFP_T_QUEUE_GET_CONFIG_REQUEST, NULL /* unsupported */ }, { OFP_T_QUEUE_GET_CONFIG_REPLY, NULL /* from switch */ }, { OFP_T_ROLE_REQUEST, NULL /* unsupported */ }, { OFP_T_ROLE_REPLY, NULL /* from switch */ }, { OFP_T_GET_ASYNC_REQUEST, NULL /* unsupported */ }, { OFP_T_GET_ASYNC_REPLY, NULL /* from switch */ }, { OFP_T_SET_ASYNC, NULL /* unsupported */ }, { OFP_T_METER_MOD, NULL /* unsupported */ } }; /* * OpenFlow protocol modification flow message command handlers */ struct ofp_flow_mod_class { uint8_t ofm_cmd_type; ofp_msg_handler ofm_cmd_handler; }; struct ofp_flow_mod_class ofp_flow_mod_table[] = { { OFP_FLOWCMD_ADD, swofp_flow_mod_cmd_add }, { OFP_FLOWCMD_MODIFY, swofp_flow_mod_cmd_modify }, { OFP_FLOWCMD_MODIFY_STRICT, swofp_flow_mod_cmd_modify_strict }, { OFP_FLOWCMD_DELETE, swofp_flow_mod_cmd_delete }, { OFP_FLOWCMD_DELETE_STRICT, swofp_flow_mod_cmd_delete_strict }, }; /* * OpenFlow protocol multipart handlers */ struct ofp_mpmsg_class { uint8_t msgsg_type; ofp_msg_handler mpmsg_handler; }; struct ofp_mpmsg_class ofp_mpmsg_table[] = { { OFP_MP_T_DESC, swofp_mp_recv_desc }, { OFP_MP_T_FLOW, swofp_mp_recv_flow }, { OFP_MP_T_AGGREGATE, swofp_mp_recv_aggregate_flow_stat }, { OFP_MP_T_TABLE, swofp_mp_recv_table_stats }, { OFP_MP_T_PORT_STATS, swofp_mp_recv_port_stats }, { OFP_MP_T_QUEUE, NULL }, { OFP_MP_T_GROUP, NULL }, { OFP_MP_T_GROUP_DESC, swofp_mp_recv_group_desc }, { OFP_MP_T_GROUP_FEATURES, NULL }, { OFP_MP_T_METER, NULL }, { OFP_MP_T_METER_CONFIG, NULL }, { OFP_MP_T_METER_FEATURES, NULL }, { OFP_MP_T_TABLE_FEATURES, swofp_mp_recv_table_features }, { OFP_MP_T_PORT_DESC, swofp_mp_recv_port_desc } }; /* * OpenFlow OXM match handlers */ #define SWOFP_MATCH_MASK 0x1 #define SWOFP_MATCH_WILDCARD 0x2 struct ofp_oxm_class { uint8_t oxm_field; uint8_t oxm_len; /* This length defined by speficication */ uint8_t oxm_flags; int (*oxm_match)(struct switch_flow_classify *, struct ofp_ox_match *); int (*oxm_set)(struct switch_flow_classify *, struct ofp_ox_match *); int (*oxm_cmp)(struct ofp_ox_match *, struct ofp_ox_match *, int); }; /* * Handlers for basic class for OpenFlow */ struct ofp_oxm_class ofp_oxm_handlers[] = { { OFP_XM_T_IN_PORT, sizeof(uint32_t), 0, swofp_ox_match_uint32, NULL, swofp_ox_cmp_data }, { OFP_XM_T_IN_PHY_PORT, sizeof(uint32_t), 0, NULL, NULL, NULL }, { OFP_XM_T_META, sizeof(uint64_t), SWOFP_MATCH_MASK|SWOFP_MATCH_WILDCARD, swofp_ox_match_uint64, NULL, NULL }, { OFP_XM_T_ETH_DST, ETHER_ADDR_LEN, SWOFP_MATCH_MASK|SWOFP_MATCH_WILDCARD, swofp_ox_match_ether_addr, swofp_ox_set_ether_addr, swofp_ox_cmp_ether_addr }, { OFP_XM_T_ETH_SRC, ETHER_ADDR_LEN, SWOFP_MATCH_MASK|SWOFP_MATCH_WILDCARD, swofp_ox_match_ether_addr, swofp_ox_set_ether_addr, swofp_ox_cmp_ether_addr }, { OFP_XM_T_ETH_TYPE, sizeof(uint16_t), SWOFP_MATCH_WILDCARD, swofp_ox_match_uint16, swofp_ox_set_uint16, swofp_ox_cmp_data }, { OFP_XM_T_VLAN_VID, sizeof(uint16_t), SWOFP_MATCH_MASK|SWOFP_MATCH_WILDCARD, swofp_ox_match_vlan_vid, swofp_ox_set_vlan_vid, swofp_ox_cmp_vlan_vid }, { OFP_XM_T_VLAN_PCP, sizeof(uint8_t), SWOFP_MATCH_WILDCARD, swofp_ox_match_uint8, swofp_ox_set_uint16, swofp_ox_cmp_data }, { OFP_XM_T_IP_DSCP, sizeof(uint8_t), SWOFP_MATCH_WILDCARD, swofp_ox_match_uint8, swofp_ox_set_uint8, swofp_ox_cmp_data }, { OFP_XM_T_IP_ECN, sizeof(uint8_t), SWOFP_MATCH_WILDCARD, swofp_ox_match_uint8, swofp_ox_set_uint8, swofp_ox_cmp_data }, { OFP_XM_T_IP_PROTO, sizeof(uint8_t), SWOFP_MATCH_WILDCARD, swofp_ox_match_uint8, swofp_ox_set_uint8, swofp_ox_cmp_data }, { OFP_XM_T_IPV4_SRC, sizeof(uint32_t), SWOFP_MATCH_MASK|SWOFP_MATCH_WILDCARD, swofp_ox_match_ipv4_addr, swofp_ox_set_ipv4_addr, swofp_ox_cmp_ipv4_addr }, { OFP_XM_T_IPV4_DST, sizeof(uint32_t), SWOFP_MATCH_MASK|SWOFP_MATCH_WILDCARD, swofp_ox_match_ipv4_addr, swofp_ox_set_ipv4_addr, swofp_ox_cmp_ipv4_addr }, { OFP_XM_T_TCP_SRC, sizeof(uint16_t), SWOFP_MATCH_WILDCARD, swofp_ox_match_uint16, swofp_ox_set_uint16, swofp_ox_cmp_data }, { OFP_XM_T_TCP_DST, sizeof(uint16_t), SWOFP_MATCH_WILDCARD, swofp_ox_match_uint16, swofp_ox_set_uint16, swofp_ox_cmp_data }, { OFP_XM_T_UDP_SRC, sizeof(uint16_t), SWOFP_MATCH_WILDCARD, swofp_ox_match_uint16, swofp_ox_set_uint16, swofp_ox_cmp_data }, { OFP_XM_T_UDP_DST, sizeof(uint16_t), SWOFP_MATCH_WILDCARD, swofp_ox_match_uint16, swofp_ox_set_uint16, swofp_ox_cmp_data }, { OFP_XM_T_SCTP_SRC, sizeof(uint16_t), SWOFP_MATCH_WILDCARD, swofp_ox_match_uint16, swofp_ox_set_uint16, swofp_ox_cmp_data }, { OFP_XM_T_SCTP_DST, sizeof(uint16_t), SWOFP_MATCH_WILDCARD, swofp_ox_match_uint16, swofp_ox_set_uint16, swofp_ox_cmp_data }, { OFP_XM_T_ICMPV4_TYPE, sizeof(uint8_t), SWOFP_MATCH_WILDCARD, swofp_ox_match_uint8, swofp_ox_set_uint8, swofp_ox_cmp_data }, { OFP_XM_T_ICMPV4_CODE, sizeof(uint8_t), SWOFP_MATCH_WILDCARD, swofp_ox_match_uint8, swofp_ox_set_uint8, swofp_ox_cmp_data }, { OFP_XM_T_ARP_OP, sizeof(uint16_t), SWOFP_MATCH_WILDCARD, swofp_ox_match_uint16, swofp_ox_set_uint16, swofp_ox_cmp_data }, { OFP_XM_T_ARP_SPA, sizeof(uint32_t), SWOFP_MATCH_MASK|SWOFP_MATCH_WILDCARD, swofp_ox_match_ipv4_addr, swofp_ox_set_ipv4_addr, swofp_ox_cmp_ipv4_addr }, { OFP_XM_T_ARP_TPA, sizeof(uint32_t), SWOFP_MATCH_MASK|SWOFP_MATCH_WILDCARD, swofp_ox_match_ipv4_addr, swofp_ox_set_ipv4_addr, swofp_ox_cmp_ipv4_addr }, { OFP_XM_T_ARP_SHA, ETHER_ADDR_LEN, SWOFP_MATCH_MASK|SWOFP_MATCH_WILDCARD, swofp_ox_match_ether_addr, swofp_ox_set_ether_addr, swofp_ox_cmp_ether_addr }, { OFP_XM_T_ARP_THA, ETHER_ADDR_LEN, SWOFP_MATCH_MASK|SWOFP_MATCH_WILDCARD, swofp_ox_match_ether_addr, swofp_ox_set_ether_addr, swofp_ox_cmp_ether_addr }, { OFP_XM_T_IPV6_SRC, sizeof(struct in6_addr), SWOFP_MATCH_MASK|SWOFP_MATCH_WILDCARD, swofp_ox_match_ipv6_addr, swofp_ox_set_ipv6_addr, swofp_ox_cmp_ipv6_addr }, { OFP_XM_T_IPV6_DST, sizeof(struct in6_addr), SWOFP_MATCH_MASK|SWOFP_MATCH_WILDCARD, swofp_ox_match_ipv6_addr, swofp_ox_set_ipv6_addr, swofp_ox_cmp_ipv6_addr }, { OFP_XM_T_IPV6_FLABEL, sizeof(uint32_t), SWOFP_MATCH_MASK|SWOFP_MATCH_WILDCARD, swofp_ox_match_uint32, swofp_ox_set_uint32, swofp_ox_cmp_data }, { OFP_XM_T_ICMPV6_TYPE, sizeof(uint8_t), SWOFP_MATCH_WILDCARD, swofp_ox_match_uint8, swofp_ox_set_uint8, swofp_ox_cmp_data }, { OFP_XM_T_ICMPV6_CODE, sizeof(uint8_t), SWOFP_MATCH_WILDCARD, swofp_ox_match_uint8, swofp_ox_set_uint8, swofp_ox_cmp_data }, { OFP_XM_T_IPV6_ND_TARGET, sizeof(struct in6_addr), SWOFP_MATCH_WILDCARD, swofp_ox_match_ipv6_addr, swofp_ox_set_ipv6_addr, swofp_ox_cmp_ipv6_addr }, { OFP_XM_T_IPV6_ND_SLL, ETHER_ADDR_LEN, SWOFP_MATCH_WILDCARD, swofp_ox_match_ether_addr, swofp_ox_set_ether_addr, swofp_ox_cmp_ether_addr }, { OFP_XM_T_IPV6_ND_TLL, ETHER_ADDR_LEN, SWOFP_MATCH_WILDCARD, swofp_ox_match_ether_addr, swofp_ox_set_ether_addr, swofp_ox_cmp_ether_addr }, { OFP_XM_T_MPLS_LABEL, sizeof(uint32_t), SWOFP_MATCH_WILDCARD, NULL, NULL, NULL }, { OFP_XM_T_MPLS_TC, sizeof(uint8_t), SWOFP_MATCH_WILDCARD, NULL, NULL, NULL }, { OFP_XM_T_MPLS_BOS, sizeof(uint8_t), SWOFP_MATCH_WILDCARD, NULL, NULL, NULL }, { OFP_XM_T_PBB_ISID, 3, SWOFP_MATCH_MASK|SWOFP_MATCH_WILDCARD, NULL, NULL, NULL }, { OFP_XM_T_TUNNEL_ID, sizeof(uint64_t), SWOFP_MATCH_WILDCARD, swofp_ox_match_uint64, swofp_ox_set_uint64, swofp_ox_cmp_data }, { OFP_XM_T_IPV6_EXTHDR, sizeof(uint16_t), SWOFP_MATCH_WILDCARD, NULL, NULL, NULL }, }; /* * Handlers for backward compatibility with NXM */ struct ofp_oxm_class ofp_oxm_nxm_handlers[] = { { OFP_XM_NXMT_TUNNEL_ID, sizeof(uint64_t), SWOFP_MATCH_MASK|SWOFP_MATCH_WILDCARD, swofp_ox_match_uint64, swofp_ox_set_uint64, swofp_ox_cmp_data }, { OFP_XM_NXMT_TUNNEL_IPV4_SRC, sizeof(uint32_t), SWOFP_MATCH_MASK|SWOFP_MATCH_WILDCARD, swofp_ox_match_ipv4_addr, swofp_ox_set_ipv4_addr, swofp_ox_cmp_ipv4_addr }, { OFP_XM_NXMT_TUNNEL_IPV4_DST, sizeof(uint32_t), SWOFP_MATCH_MASK|SWOFP_MATCH_WILDCARD, swofp_ox_match_ipv4_addr, swofp_ox_set_ipv4_addr, swofp_ox_cmp_ipv4_addr }, { OFP_XM_NXMT_TUNNEL_IPV6_SRC, sizeof(struct in6_addr), SWOFP_MATCH_MASK|SWOFP_MATCH_WILDCARD, swofp_ox_match_ipv6_addr, swofp_ox_set_ipv6_addr, swofp_ox_cmp_ipv6_addr }, { OFP_XM_NXMT_TUNNEL_IPV6_DST, sizeof(struct in6_addr), SWOFP_MATCH_MASK|SWOFP_MATCH_WILDCARD, swofp_ox_match_ipv6_addr, swofp_ox_set_ipv6_addr, swofp_ox_cmp_ipv6_addr }, }; /* * OpenFlow action handlers */ struct ofp_action_handler { uint16_t action_type; struct mbuf * (*action)(struct switch_softc *, struct mbuf *, struct swofp_pipeline_desc *, struct ofp_action_header *); }; struct ofp_action_handler ofp_action_handlers[] = { /* * Following order complies with action set order in * OpenFlow Switch Specification (ver. 1.3.5) */ { OFP_ACTION_COPY_TTL_IN, NULL }, { OFP_ACTION_POP_MPLS, NULL }, { OFP_ACTION_POP_PBB, NULL }, { OFP_ACTION_POP_VLAN, swofp_action_pop_vlan }, { OFP_ACTION_PUSH_MPLS, NULL }, { OFP_ACTION_PUSH_PBB, NULL }, { OFP_ACTION_PUSH_VLAN, swofp_action_push_vlan }, { OFP_ACTION_COPY_TTL_OUT, NULL }, { OFP_ACTION_DEC_NW_TTL, NULL }, { OFP_ACTION_DEC_MPLS_TTL, NULL }, { OFP_ACTION_SET_MPLS_TTL, NULL }, { OFP_ACTION_SET_NW_TTL, NULL }, { OFP_ACTION_SET_FIELD, swofp_action_set_field }, { OFP_ACTION_SET_QUEUE, NULL }, { OFP_ACTION_GROUP, swofp_action_group }, { OFP_ACTION_OUTPUT, swofp_action_output }, { OFP_ACTION_EXPERIMENTER, NULL }, /* XXX Where is best position? */ }; extern struct pool swfcl_pool; struct pool swpld_pool; void swofp_attach(void) { pool_init(&swpld_pool, sizeof(struct swofp_pipeline_desc), 0, 0, 0, "swpld", NULL); } int swofp_create(struct switch_softc *sc) { struct swofp_ofs *swofs; int error; swofs = malloc(sizeof(*swofs), M_DEVBUF, M_NOWAIT|M_ZERO); if (swofs == NULL) return (ENOMEM); sc->sc_ofs = swofs; TAILQ_INIT(&swofs->swofs_table_list); /* * A table with id 0 must exist */ if ((swofp_flow_table_add(sc, 0)) == NULL) { error = ENOBUFS; free(swofs, M_DEVBUF, sizeof(*swofs)); return (error); } swofs->swofs_xidnxt = 1; arc4random_buf(&swofs->swofs_datapath_id, sizeof(swofs->swofs_datapath_id)); timeout_set(&swofs->swofs_flow_timeout, swofp_timer, sc); timeout_add_sec(&swofs->swofs_flow_timeout, 10); /* TODO: Configured from ifconfig */ swofs->swofs_group_max_table = 1000; swofs->swofs_flow_max_entry = 10000; sc->sc_capabilities |= SWITCH_CAP_OFP; sc->switch_process_forward = swofp_forward_ofs; #if NBPFILTER > 0 bpfattach(&sc->sc_ofbpf, &sc->sc_if, DLT_OPENFLOW, sizeof(struct ofp_header)); #endif return (0); } void swofp_destroy(struct switch_softc *sc) { struct swofp_ofs *swofs = sc->sc_ofs; if ((sc->sc_capabilities & SWITCH_CAP_OFP) == 0 || swofs == NULL) return; timeout_del(&swofs->swofs_flow_timeout); sc->sc_capabilities &= ~SWITCH_CAP_OFP; sc->switch_process_forward = NULL; swofp_group_entry_delete_all(sc); free(swofs, M_DEVBUF, sizeof(*swofs)); } int swofp_init(struct switch_softc *sc) { sc->sc_swdev->swdev_input = swofp_input; swofp_send_hello(sc); return (0); } uint32_t swofp_assign_portno(struct switch_softc *sc, uint32_t req) { struct switch_port *swpo; uint32_t candidate; TAILQ_FOREACH(swpo, &sc->sc_swpo_list, swpo_list_next) { if (swpo->swpo_port_no == req) break; } if (swpo == NULL) return (req); /* XXX * OS's ifindex is "short", so it expect that floowing is unique */ candidate = (req << 16) | req; while (1) { TAILQ_FOREACH(swpo, &sc->sc_swpo_list, swpo_list_next) { if (swpo->swpo_port_no == candidate) break; } if (swpo == NULL) return (candidate); if (candidate < OFP_PORT_MAX) candidate++; else candidate = 0; } } int swofp_ioctl(struct ifnet *ifp, unsigned long cmd, caddr_t data) { struct switch_softc *sc = ifp->if_softc; struct swofp_ofs *swofs = sc->sc_ofs; struct ifbrparam *bparam = (struct ifbrparam *)data; struct ifbreq *breq = (struct ifbreq *)data; struct switch_port *swpo; struct ifnet *ifs; int error = 0; switch (cmd) { case SIOCSWGDPID: memcpy(&bparam->ifbrp_datapath, &swofs->swofs_datapath_id, sizeof(uint64_t)); break; case SIOCSWSDPID: if ((error = suser(curproc, 0)) != 0) break; memcpy(&swofs->swofs_datapath_id, &bparam->ifbrp_datapath, sizeof(uint64_t)); break; case SIOCSWGMAXFLOW: bparam->ifbrp_maxflow = swofs->swofs_flow_max_entry; break; case SIOCSWGMAXGROUP: bparam->ifbrp_maxgroup = swofs->swofs_group_max_table; break; case SIOCSWSPORTNO: if ((error = suser(curproc, 0)) != 0) break; if (breq->ifbr_portno >= OFP_PORT_MAX) return (EINVAL); if ((ifs = ifunit(breq->ifbr_ifsname)) == NULL) return (ENOENT); if (ifs->if_switchport == NULL) return (ENOENT); TAILQ_FOREACH(swpo, &sc->sc_swpo_list, swpo_list_next) { if (swpo->swpo_port_no == breq->ifbr_portno) return (EEXIST); } swpo = (struct switch_port *)ifs->if_switchport; swpo->swpo_port_no = breq->ifbr_portno; break; default: error = ENOTTY; break; } return (error); } /* TODO: Optimization */ struct ofp_oxm_class * swofp_lookup_oxm_handler(struct ofp_ox_match *oxm) { struct ofp_oxm_class *handlers; uint8_t oxm_field; int i, len; switch (ntohs(oxm->oxm_class)) { case OFP_OXM_C_OPENFLOW_BASIC: handlers = ofp_oxm_handlers; len = nitems(ofp_oxm_handlers); break; case OFP_OXM_C_NXM_1: handlers = ofp_oxm_nxm_handlers; len = nitems(ofp_oxm_nxm_handlers); break; default: return (NULL); } oxm_field = OFP_OXM_GET_FIELD(oxm); for (i = 0; i < len ; i++) { if (handlers[i].oxm_field == oxm_field) return (&handlers[i]); } return (NULL); } ofp_msg_handler swofp_lookup_msg_handler(uint8_t type) { if (type > OFP_T_TYPE_MAX) return (NULL); else return (ofp_msg_table[type].msg_handler); } ofp_msg_handler swofp_lookup_mpmsg_handler(uint16_t type) { if (type > nitems(ofp_mpmsg_table)) return (NULL); else return (ofp_mpmsg_table[type].mpmsg_handler); } struct ofp_action_handler * swofp_lookup_action_handler(uint16_t type) { int i; for (i = 0; i < nitems(ofp_action_handlers); i++) { if (ofp_action_handlers[i].action_type == type) return &(ofp_action_handlers[i]); } return (NULL); } struct swofp_pipeline_desc * swofp_pipeline_desc_create(struct switch_flow_classify *swfcl) { struct swofp_pipeline_desc *swpld = NULL; struct swofp_action_set *swas = NULL; int i; swpld = pool_get(&swpld_pool, PR_NOWAIT|PR_ZERO); if (swpld == NULL) return (NULL); /* * ofp_action_handlers is sorted by applying action-set order, * so it can be used for initializer for action-set. */ swas = swpld->swpld_action_set; for (i = 0; i < nitems(ofp_action_handlers); i++) { swas[i].swas_type = ofp_action_handlers[i].action_type; if (swas[i].swas_type == OFP_ACTION_SET_FIELD) swas[i].swas_action = (struct ofp_action_header *) swpld->swpld_set_fields; else swas[i].swas_action = NULL; } swpld->swpld_swfcl = swfcl; return (swpld); } void swofp_pipeline_desc_destroy(struct swofp_pipeline_desc *swpld) { switch_swfcl_free(&swpld->swpld_pre_swfcl); pool_put(&swpld_pool, swpld); } struct swofp_flow_table * swofp_flow_table_lookup(struct switch_softc *sc, uint16_t table_id) { struct swofp_ofs *ofs = sc->sc_ofs; struct swofp_flow_table *swft; TAILQ_FOREACH(swft, &ofs->swofs_table_list, swft_table_next) { if (swft->swft_table_id == table_id) return (swft); } return (NULL); } struct swofp_flow_table * swofp_flow_table_add(struct switch_softc *sc, uint16_t table_id) { struct swofp_ofs *ofs = sc->sc_ofs; struct swofp_flow_table *swft, *new; if ((swft = swofp_flow_table_lookup(sc, table_id)) != NULL) return (swft); if ((new = malloc(sizeof(*new), M_DEVBUF, M_NOWAIT|M_ZERO)) == NULL) return (NULL); new->swft_table_id = table_id; TAILQ_FOREACH(swft, &ofs->swofs_table_list, swft_table_next) { if (table_id < swft->swft_table_id) break; } if (swft) TAILQ_INSERT_BEFORE(swft, new, swft_table_next); else TAILQ_INSERT_TAIL(&ofs->swofs_table_list, new, swft_table_next); DPRINTF(sc, "add openflow flow table (id:%d)\n", table_id); return (new); } int swofp_flow_table_delete(struct switch_softc *sc, uint16_t table_id) { struct swofp_ofs *ofs = sc->sc_ofs; struct swofp_flow_table *swft; struct swofp_flow_entry *swfe, *tswfe; if ((swft = swofp_flow_table_lookup(sc, table_id)) == NULL) return ENOENT; LIST_FOREACH_SAFE(swfe, &swft->swft_flow_list, swfe_next, tswfe) { /* * Flows are deleted force becouse of deleting table, * s it's not necessary to send flow remove message. */ swfe->swfe_flags &= ~(OFP_FLOWFLAG_SEND_FLOW_REMOVED); swofp_flow_entry_delete(sc, swft, swfe, OFP_FLOWREM_REASON_DELETE); } TAILQ_REMOVE(&ofs->swofs_table_list, swft, swft_table_next); free(swft, M_DEVBUF, sizeof(*swft)); DPRINTF(sc, "delete flow table (id:%d)\n", table_id); return 0; } void swofp_flow_table_delete_all(struct switch_softc *sc) { struct swofp_ofs *ofs = sc->sc_ofs; struct swofp_flow_table *swft, *tswft; int error; TAILQ_FOREACH_SAFE(swft, &ofs->swofs_table_list, swft_table_next, tswft) { if ((error = swofp_flow_table_delete(sc,swft->swft_table_id))) log(LOG_ERR, "can't delete table id:%d (error:%d)\n", swft->swft_table_id, error); } } struct swofp_group_entry * swofp_group_entry_lookup(struct switch_softc *sc, uint32_t group_id) { struct swofp_ofs *ofs = sc->sc_ofs; struct swofp_group_entry *swge; LIST_FOREACH(swge, &ofs->swofs_group_table, swge_next) { if (swge->swge_group_id == group_id) return swge; } return (NULL); } int swofp_group_entry_add(struct switch_softc *sc, struct swofp_group_entry *swge) { struct swofp_ofs *ofs = sc->sc_ofs; LIST_INSERT_HEAD(&ofs->swofs_group_table, swge, swge_next); ofs->swofs_group_table_num++; DPRINTF(sc, "add group %d in group table (total %d)\n", swge->swge_group_id, ofs->swofs_group_table_num); return (0); } int swofp_group_entry_delete(struct switch_softc *sc, struct swofp_group_entry *swge) { struct swofp_ofs *ofs = sc->sc_ofs; struct swofp_flow_table *swft; DPRINTF(sc, "delete group %d in group table (total %d)\n", swge->swge_group_id, ofs->swofs_group_table_num); LIST_REMOVE(swge, swge_next); ofs->swofs_group_table_num--; TAILQ_FOREACH(swft, &ofs->swofs_table_list, swft_table_next) { swofp_flow_delete_on_table_by_group(sc, swft, swge->swge_group_id); } free(swge->swge_buckets, M_DEVBUF, swge->swge_buckets_len); free(swge, M_DEVBUF, sizeof(*swge)); return (0); } int swofp_group_entry_delete_all(struct switch_softc *sc) { struct swofp_ofs *ofs = sc->sc_ofs; struct swofp_group_entry *swge, *tswge; LIST_FOREACH_SAFE(swge, &ofs->swofs_group_table, swge_next, tswge) { swofp_group_entry_delete(sc, swge); } return (0); } int swofp_validate_buckets(struct switch_softc *sc, struct mbuf *m, uint8_t type, uint16_t *etype, uint16_t *error) { struct ofp_group_mod *ogm; struct ofp_bucket *bucket; struct ofp_action_header *ah; uint16_t weight, remaining; int start, len, off, num; size_t blen; *etype = OFP_ERRTYPE_GROUP_MOD_FAILED; ogm = mtod(m, struct ofp_group_mod *); start = offsetof(struct ofp_group_mod, gm_buckets); remaining = len = ntohs(ogm->gm_oh.oh_length) - start; /* Invalid packet size. */ if (len < 0) { *error = OFP_ERRGROUPMOD_INVALID_GROUP; return (-1); } /* Indirect group type must always have one bucket. */ if (len < sizeof(*bucket) && type == OFP_GROUP_T_INDIRECT) { *error = OFP_ERRGROUPMOD_INVALID_GROUP; return (-1); } for (off = start, num = 0; off < start + len; off += blen, num++) { bucket = (struct ofp_bucket *)(mtod(m, caddr_t) + off); blen = ntohs(bucket->b_len); if (blen < sizeof(*bucket)) { *error = OFP_ERRGROUPMOD_BAD_BUCKET; return (-1); } /* Validate that the bucket is smaller than the payload. */ if (blen > remaining) { *etype = OFP_ERRTYPE_BAD_REQUEST; *error = OFP_ERRREQ_BAD_LEN; return (-1); } remaining -= blen; /* * Validate weight */ switch (type) { case OFP_GROUP_T_ALL: case OFP_GROUP_T_INDIRECT: case OFP_GROUP_T_FAST_FAILOVER: if (ntohs(bucket->b_weight) != 0) { *error = OFP_ERRGROUPMOD_BAD_BUCKET; return (-1); } break; case OFP_GROUP_T_SELECT: if (num > 1 && weight != ntohs(bucket->b_weight)) { *error = OFP_ERRGROUPMOD_WEIGHT_UNSUPP; return (-1); } break; } /* * INDIRECT type has only one bucket */ if (type == OFP_GROUP_T_INDIRECT && num > 1) { *error = OFP_ERRGROUPMOD_BAD_BUCKET; return (-1); } weight = ntohs(bucket->b_weight); /* Skip if there are no actions to validate. */ if (blen == sizeof(*bucket)) continue; ah = (struct ofp_action_header *) (mtod(m, caddr_t) + off + sizeof(*bucket)); if (swofp_validate_action(sc, ah, blen - sizeof(*bucket), error)) { *etype = OFP_ERRTYPE_BAD_ACTION; return (-1); } } return (0); } void swofp_flow_entry_instruction_free(struct swofp_flow_entry *swfe) { if (swfe->swfe_goto_table) free(swfe->swfe_goto_table, M_DEVBUF, ntohs(swfe->swfe_goto_table->igt_len)); if (swfe->swfe_write_metadata) free(swfe->swfe_write_metadata, M_DEVBUF, ntohs(swfe->swfe_write_metadata->iwm_len)); if (swfe->swfe_apply_actions) free(swfe->swfe_apply_actions, M_DEVBUF, ntohs(swfe->swfe_apply_actions->ia_len)); if (swfe->swfe_write_actions) free(swfe->swfe_write_actions, M_DEVBUF, ntohs(swfe->swfe_write_actions->ia_len)); if (swfe->swfe_clear_actions) free(swfe->swfe_clear_actions, M_DEVBUF, ntohs(swfe->swfe_clear_actions->ia_len)); if (swfe->swfe_experimenter) free(swfe->swfe_experimenter, M_DEVBUF, ntohs(swfe->swfe_experimenter->ie_len)); if (swfe->swfe_meter) free(swfe->swfe_meter, M_DEVBUF, ntohs(swfe->swfe_meter->im_len)); } void swofp_flow_entry_free(struct swofp_flow_entry **swfe) { if ((*swfe)->swfe_match) free((*swfe)->swfe_match, M_DEVBUF, ntohs((*swfe)->swfe_match->om_length)); swofp_flow_entry_instruction_free(*swfe); free((*swfe), M_DEVBUF, sizeof(**swfe)); } void swofp_flow_entry_add(struct switch_softc *sc, struct swofp_flow_table *swft, struct swofp_flow_entry *swfe) { swfe->swfe_table_id = swft->swft_table_id; LIST_INSERT_HEAD(&swft->swft_flow_list, swfe, swfe_next); swft->swft_flow_num++; DPRINTF(sc, "add flow in table %d (total %d)\n", swft->swft_table_id, swft->swft_flow_num); } void swofp_flow_entry_delete(struct switch_softc *sc, struct swofp_flow_table *swft, struct swofp_flow_entry *swfe, uint8_t reason) { if (swfe->swfe_flags & OFP_FLOWFLAG_SEND_FLOW_REMOVED) swofp_send_flow_removed(sc, swfe, reason); LIST_REMOVE(swfe, swfe_next); swofp_flow_entry_free(&swfe); swft->swft_flow_num--; DPRINTF(sc, "delete flow from table %d (total %d)\n", swft->swft_table_id, swft->swft_flow_num); } void swofp_flow_timeout(struct switch_softc *sc) { struct swofp_ofs *ofs = sc->sc_ofs; struct swofp_flow_table *swft; struct swofp_flow_entry *swfe, *tswfe; struct timespec now, duration, idle; nanouptime(&now); TAILQ_FOREACH(swft, &ofs->swofs_table_list, swft_table_next) { LIST_FOREACH_SAFE(swfe, &swft->swft_flow_list, swfe_next, tswfe) { if (swfe->swfe_idle_timeout) { timespecsub(&now, &swfe->swfe_idle_time, &idle); if (swfe->swfe_idle_timeout < idle.tv_sec) { DPRINTF(sc, "flow expired " "by idle timeout\n"); swofp_flow_entry_delete(sc, swft, swfe, OFP_FLOWREM_REASON_IDLE_TIMEOUT); continue; } } if (swfe->swfe_hard_timeout) { timespecsub(&now, &swfe->swfe_installed_time, &duration); if (swfe->swfe_hard_timeout < duration.tv_sec) { DPRINTF(sc, "flow expired " "by hard timeout\n"); swofp_flow_entry_delete(sc, swft, swfe, OFP_FLOWREM_REASON_HARD_TIMEOUT); } } } } } void swofp_timer(void *v) { struct switch_softc *sc = (struct switch_softc *)v; struct swofp_ofs *swofs = sc->sc_ofs; swofp_flow_timeout(sc); timeout_add_sec(&swofs->swofs_flow_timeout, 10); } int swofp_ox_cmp_data(struct ofp_ox_match *target, struct ofp_ox_match *key, int strict) { uint64_t tmth, tmask, kmth, kmask; uint64_t dummy_mask = UINT64_MAX; int len; if (OFP_OXM_GET_FIELD(target) != OFP_OXM_GET_FIELD(key)) return (1); switch (OFP_OXM_GET_FIELD(target)) { case OFP_XM_T_VLAN_PCP: case OFP_XM_T_IP_DSCP: case OFP_XM_T_IP_ECN: case OFP_XM_T_IP_PROTO: case OFP_XM_T_ICMPV4_CODE: case OFP_XM_T_ICMPV4_TYPE: case OFP_XM_T_ICMPV6_CODE: case OFP_XM_T_ICMPV6_TYPE: len = sizeof(uint8_t); break; case OFP_XM_T_ETH_TYPE: case OFP_XM_T_TCP_SRC: case OFP_XM_T_TCP_DST: case OFP_XM_T_UDP_SRC: case OFP_XM_T_UDP_DST: case OFP_XM_T_ARP_OP: len = sizeof(uint16_t); break; case OFP_XM_T_IN_PORT: case OFP_XM_T_IPV6_FLABEL: len = sizeof(uint32_t); break; case OFP_XM_T_TUNNEL_ID: /* alias OFP_XM_NXMT_TUNNEL_ID */ len = sizeof(uint64_t); break; default: return (1); } tmth = tmask = kmth = kmask = 0; memcpy(&tmth, ((caddr_t)target + sizeof(*target)), len); if (OFP_OXM_GET_HASMASK(target)) memcpy(&tmask, ((caddr_t)target + sizeof(*target) + len), len); else memcpy(&tmask, &dummy_mask, len); memcpy(&kmth, ((caddr_t)key + sizeof(*key)), len); if (OFP_OXM_GET_HASMASK(key)) memcpy(&kmask, ((caddr_t)key + sizeof(*key) + len), len); else memcpy(&kmask, &dummy_mask, len); if (strict) { if (tmask != kmask) return (1); return !((tmth & tmask) == (kmth & kmask)); } else { if ((tmask & kmask) != kmask) return (1); return !((tmth & kmask) == (kmth & kmask)); } return !((tmth & tmask) == (kmth & kmask)); } int swofp_ox_cmp_ipv6_addr(struct ofp_ox_match *target, struct ofp_ox_match *key, int strict) { struct in6_addr tmth, tmask, kmth, kmask; struct in6_addr mask = in6mask128; if (OFP_OXM_GET_FIELD(target) != OFP_OXM_GET_FIELD(key)) return (1); switch (OFP_OXM_GET_FIELD(target)) { case OFP_XM_NXMT_TUNNEL_IPV6_SRC: case OFP_XM_NXMT_TUNNEL_IPV6_DST: case OFP_XM_T_IPV6_SRC: case OFP_XM_T_IPV6_DST: case OFP_XM_T_IPV6_ND_TARGET: break; default: return (1); } memcpy(&kmth, ((caddr_t)key + sizeof(*key)), sizeof(kmth)); if (OFP_OXM_GET_HASMASK(key)) memcpy(&kmask, ((caddr_t)key + sizeof(*key) + sizeof(kmask)), sizeof(kmask)); else kmask = mask; memcpy(&tmth, ((caddr_t)target + sizeof(*target)), sizeof(tmth)); if (OFP_OXM_GET_HASMASK(target)) memcpy(&tmask, ((caddr_t)target + sizeof(*target) + sizeof(tmask)), sizeof(tmask)); else tmask = mask; if (strict) { if (memcmp(&tmask, &kmask, sizeof(tmask)) != 0) return (1); tmth.s6_addr32[0] &= tmask.s6_addr32[0]; tmth.s6_addr32[1] &= tmask.s6_addr32[1]; tmth.s6_addr32[2] &= tmask.s6_addr32[2]; tmth.s6_addr32[3] &= tmask.s6_addr32[3]; kmth.s6_addr32[0] &= kmask.s6_addr32[0]; kmth.s6_addr32[1] &= kmask.s6_addr32[1]; kmth.s6_addr32[2] &= kmask.s6_addr32[2]; kmth.s6_addr32[3] &= kmask.s6_addr32[3]; return memcmp(&tmth, &kmth, sizeof(tmth)); } else { tmask.s6_addr32[0] &= kmask.s6_addr32[0]; tmask.s6_addr32[1] &= kmask.s6_addr32[1]; tmask.s6_addr32[2] &= kmask.s6_addr32[2]; tmask.s6_addr32[3] &= kmask.s6_addr32[3]; if (memcmp(&tmask, &kmask, sizeof(tmask)) != 0) return (1); tmth.s6_addr32[0] &= kmask.s6_addr32[0]; tmth.s6_addr32[1] &= kmask.s6_addr32[1]; tmth.s6_addr32[2] &= kmask.s6_addr32[2]; tmth.s6_addr32[3] &= kmask.s6_addr32[3]; kmth.s6_addr32[0] &= kmask.s6_addr32[0]; kmth.s6_addr32[1] &= kmask.s6_addr32[1]; kmth.s6_addr32[2] &= kmask.s6_addr32[2]; kmth.s6_addr32[3] &= kmask.s6_addr32[3]; return memcmp(&tmth, &kmth, sizeof(tmth)); } } int swofp_ox_cmp_ipv4_addr(struct ofp_ox_match *target, struct ofp_ox_match *key, int strict) { uint32_t tmth, tmask, kmth, kmask; if (OFP_OXM_GET_FIELD(target) != OFP_OXM_GET_FIELD(key)) return (1); switch (OFP_OXM_GET_FIELD(target)) { case OFP_XM_NXMT_TUNNEL_IPV4_SRC: case OFP_XM_NXMT_TUNNEL_IPV4_DST: case OFP_XM_T_IPV4_SRC: case OFP_XM_T_IPV4_DST: case OFP_XM_T_ARP_SPA: case OFP_XM_T_ARP_TPA: break; default: return (1); } memcpy(&tmth, ((caddr_t)target + sizeof(*target)), sizeof(uint32_t)); if (OFP_OXM_GET_HASMASK(target)) memcpy(&tmask, ((caddr_t)target + sizeof(*target) + sizeof(uint32_t)), sizeof(uint32_t)); else tmask = UINT32_MAX; memcpy(&kmth, ((caddr_t)key + sizeof(*key)), sizeof(uint32_t)); if (OFP_OXM_GET_HASMASK(key)) memcpy(&kmask, ((caddr_t)key + sizeof(*key) + sizeof(uint32_t)), sizeof(uint32_t)); else kmask = UINT32_MAX; if (strict) { if (tmask != kmask) return (1); return !((tmth & tmask) == (kmth & kmask)); } else { if ((tmask & kmask) != kmask) return (1); return !((tmth & kmask) == (kmth & kmask)); } } int swofp_ox_cmp_vlan_vid(struct ofp_ox_match *target, struct ofp_ox_match *key, int strict) { uint16_t tmth, tmask, kmth, kmask; if (OFP_OXM_GET_FIELD(target) != OFP_OXM_GET_FIELD(key) || OFP_OXM_GET_FIELD(target) != OFP_XM_T_VLAN_VID) return (1); memcpy(&tmth, ((caddr_t)target + sizeof(*target)), sizeof(uint16_t)); if (OFP_OXM_GET_HASMASK(target)) memcpy(&tmask, ((caddr_t)target + sizeof(*target) + sizeof(uint16_t)), sizeof(uint16_t)); else tmask = UINT16_MAX; memcpy(&kmth, ((caddr_t)key + sizeof(*key)), sizeof(uint16_t)); if (OFP_OXM_GET_HASMASK(target)) memcpy(&kmask, ((caddr_t)key + sizeof(*key) + sizeof(uint16_t)), sizeof(uint16_t)); else kmask = UINT16_MAX; tmth &= htons(EVL_VLID_MASK); tmask &= htons(EVL_VLID_MASK); kmth &= htons(EVL_VLID_MASK); kmask &= htons(EVL_VLID_MASK); if (strict) { if (tmask != kmask) return (1); return !((tmth & tmask) == (kmth & kmask)); } else { if ((tmask & kmask) != kmask) return (1); return !((tmth & kmask) == (kmth & kmask)); } } int swofp_ox_cmp_ether_addr(struct ofp_ox_match *target, struct ofp_ox_match *key, int strict) { uint64_t tmth, tmask, kmth, kmask; uint64_t eth_mask = 0x0000FFFFFFFFFFFFULL; if (OFP_OXM_GET_FIELD(target) != OFP_OXM_GET_FIELD(key)) return (1); switch (OFP_OXM_GET_FIELD(target)) { case OFP_XM_T_ETH_SRC: case OFP_XM_T_ETH_DST: case OFP_XM_T_ARP_SHA: case OFP_XM_T_ARP_THA: case OFP_XM_T_IPV6_ND_SLL: case OFP_XM_T_IPV6_ND_TLL: break; default: return (1); } memcpy(&tmth, ((caddr_t)target + sizeof(*target)), ETHER_ADDR_LEN); if (OFP_OXM_GET_HASMASK(target)) memcpy(&tmask, ((caddr_t)target + sizeof(*target) + ETHER_ADDR_LEN), ETHER_ADDR_LEN); else tmask = UINT64_MAX; memcpy(&kmth, ((caddr_t)key + sizeof(*key)), ETHER_ADDR_LEN); if (OFP_OXM_GET_HASMASK(key)) memcpy(&kmask, ((caddr_t)key + sizeof(*key) + ETHER_ADDR_LEN), ETHER_ADDR_LEN); else kmask = UINT64_MAX; tmask &= eth_mask; tmth &= eth_mask; kmask &= eth_mask; kmth &= eth_mask; if (strict) { if (tmask != kmask) return (1); return !((tmth & tmask) == (kmth & kmask)); } else { if ((tmask & kmask) != kmask) return (1); return !((tmth & kmask) == (kmth & kmask)); } } int swofp_validate_oxm(struct ofp_ox_match *oxm, uint16_t *err) { struct ofp_oxm_class *handler; int hasmask; int neededlen; handler = swofp_lookup_oxm_handler(oxm); if (handler == NULL || handler->oxm_match == NULL) { *err = OFP_ERRMATCH_BAD_FIELD; return (-1); } hasmask = OFP_OXM_GET_HASMASK(oxm); neededlen = (hasmask) ? (handler->oxm_len * 2) : (handler->oxm_len); if (oxm->oxm_length != neededlen) { *err = OFP_ERRMATCH_BAD_LEN; return (-1); } return (0); } int swofp_validate_flow_match(struct ofp_match *om, uint16_t *err) { struct ofp_ox_match *oxm; /* * TODO this function is missing checks for: * - OFP_ERRMATCH_BAD_TAG; * - OFP_ERRMATCH_BAD_VALUE; * - OFP_ERRMATCH_BAD_MASK; * - OFP_ERRMATCH_BAD_PREREQ; * - OFP_ERRMATCH_DUP_FIELD; */ OFP_OXM_FOREACH(om, ntohs(om->om_length), oxm) { if (swofp_validate_oxm(oxm, err)) return (*err); } return (0); } int swofp_validate_flow_instruction(struct switch_softc *sc, struct ofp_instruction *oi, size_t total, uint16_t *etype, uint16_t *err) { struct ofp_action_header *oah; struct ofp_instruction_actions *oia; int ilen; *etype = OFP_ERRTYPE_BAD_INSTRUCTION; ilen = ntohs(oi->i_len); /* Check for bigger than packet or smaller than header. */ if (ilen > total || ilen < sizeof(*oi)) { *err = OFP_ERRINST_BAD_LEN; return (-1); } switch (ntohs(oi->i_type)) { case OFP_INSTRUCTION_T_GOTO_TABLE: if (ilen != sizeof(struct ofp_instruction_goto_table)) { *err = OFP_ERRINST_BAD_LEN; return (-1); } break; case OFP_INSTRUCTION_T_WRITE_META: if (ilen != sizeof(struct ofp_instruction_write_metadata)) { *err = OFP_ERRINST_BAD_LEN; return (-1); } break; case OFP_INSTRUCTION_T_METER: if (ilen != sizeof(struct ofp_instruction_meter)) { *err = OFP_ERRINST_BAD_LEN; return (-1); } break; case OFP_INSTRUCTION_T_WRITE_ACTIONS: case OFP_INSTRUCTION_T_CLEAR_ACTIONS: case OFP_INSTRUCTION_T_APPLY_ACTIONS: if (ilen < sizeof(*oia)) { *err = OFP_ERRINST_BAD_LEN; return (-1); } oia = (struct ofp_instruction_actions *)oi; /* Validate actions before iterating over them. */ oah = (struct ofp_action_header *) ((uint8_t *)oia + sizeof(*oia)); if (swofp_validate_action(sc, oah, ilen - sizeof(*oia), err)) { *etype = OFP_ERRTYPE_BAD_ACTION; return (-1); } break; case OFP_INSTRUCTION_T_EXPERIMENTER: /* FALLTHROUGH */ default: *err = OFP_ERRINST_UNKNOWN_INST; return (-1); } return (0); } int swofp_validate_action(struct switch_softc *sc, struct ofp_action_header *ah, size_t ahtotal, uint16_t *err) { struct ofp_action_handler *oah; struct ofp_ox_match *oxm; struct ofp_action_push *ap; struct ofp_action_group *ag; struct ofp_action_output *ao; struct switch_port *swpo; uint8_t *dptr; int ahtype, ahlen, oxmlen; /* No actions. */ if (ahtotal == 0) return (0); /* Check if we have at least the first header. */ if (ahtotal < sizeof(*ah)) { *err = OFP_ERRACTION_LEN; return (-1); } parse_next_action: ahtype = ntohs(ah->ah_type); ahlen = ntohs(ah->ah_len); if (ahlen < sizeof(*ah) || ahlen > ahtotal) { *err = OFP_ERRACTION_LEN; return (-1); } switch (ahtype) { case OFP_ACTION_OUTPUT: if (ahlen != sizeof(struct ofp_action_output)) { *err = OFP_ERRACTION_LEN; return (-1); } ao = (struct ofp_action_output *)ah; switch (ntohl(ao->ao_port)) { case OFP_PORT_ANY: *err = OFP_ERRACTION_OUT_PORT; return (-1); case OFP_PORT_ALL: case OFP_PORT_NORMAL: /* TODO implement port ALL and NORMAL. */ *err = OFP_ERRACTION_OUT_PORT; return (-1); case OFP_PORT_CONTROLLER: case OFP_PORT_FLOWTABLE: case OFP_PORT_FLOOD: case OFP_PORT_INPUT: case OFP_PORT_LOCAL: break; default: TAILQ_FOREACH(swpo, &sc->sc_swpo_list, swpo_list_next) { if (swpo->swpo_port_no == ntohl(ao->ao_port)) break; } if (swpo == NULL) { *err = OFP_ERRACTION_OUT_PORT; return (-1); } break; } break; case OFP_ACTION_GROUP: if (ahlen != sizeof(struct ofp_action_group)) { *err = OFP_ERRACTION_LEN; return (-1); } ag = (struct ofp_action_group *)ah; if (swofp_group_entry_lookup(sc, ntohl(ag->ag_group_id)) == NULL) { *err = OFP_ERRACTION_BAD_OUT_GROUP; return (-1); } break; case OFP_ACTION_SET_QUEUE: if (ahlen != sizeof(struct ofp_action_set_queue)) { *err = OFP_ERRACTION_LEN; return (-1); } break; case OFP_ACTION_SET_MPLS_TTL: if (ahlen != sizeof(struct ofp_action_mpls_ttl)) { *err = OFP_ERRACTION_LEN; return (-1); } break; case OFP_ACTION_SET_NW_TTL: if (ahlen != sizeof(struct ofp_action_nw_ttl)) { *err = OFP_ERRACTION_LEN; return (-1); } break; case OFP_ACTION_COPY_TTL_OUT: case OFP_ACTION_COPY_TTL_IN: case OFP_ACTION_DEC_MPLS_TTL: case OFP_ACTION_POP_VLAN: if (ahlen != sizeof(struct ofp_action_header)) { *err = OFP_ERRACTION_LEN; return (-1); } break; case OFP_ACTION_PUSH_VLAN: case OFP_ACTION_PUSH_MPLS: case OFP_ACTION_PUSH_PBB: if (ahlen != sizeof(struct ofp_action_push)) { *err = OFP_ERRACTION_LEN; return (-1); } ap = (struct ofp_action_push *)ah; switch (ntohs(ap->ap_type)) { case OFP_ACTION_PUSH_VLAN: if (ntohs(ap->ap_ethertype) != ETHERTYPE_VLAN && ntohs(ap->ap_ethertype) != ETHERTYPE_QINQ) { *err = OFP_ERRACTION_ARGUMENT; return (-1); } break; case OFP_ACTION_PUSH_MPLS: case OFP_ACTION_PUSH_PBB: /* Not implemented yet. */ default: *err = OFP_ERRACTION_TYPE; return (-1); } break; case OFP_ACTION_POP_MPLS: if (ahlen != sizeof(struct ofp_action_pop_mpls)) { *err = OFP_ERRACTION_LEN; return (-1); } break; case OFP_ACTION_SET_FIELD: if (ahlen < sizeof(struct ofp_action_set_field)) { *err = OFP_ERRACTION_LEN; return (-1); } oxmlen = ahlen - (sizeof(struct ofp_action_set_field) - offsetof(struct ofp_action_set_field, asf_field)); if (oxmlen < sizeof(*oxm)) { *err = OFP_ERRACTION_LEN; return (-1); } dptr = (uint8_t *)ah; dptr += sizeof(struct ofp_action_set_field) - offsetof(struct ofp_action_set_field, asf_field); while (oxmlen > 0) { oxm = (struct ofp_ox_match *)dptr; if (swofp_validate_oxm(oxm, err)) { if (*err == OFP_ERRMATCH_BAD_LEN) *err = OFP_ERRACTION_SET_LEN; else *err = OFP_ERRACTION_SET_TYPE; return (-1); } dptr += sizeof(*oxm) + oxm->oxm_length; oxmlen -= sizeof(*oxm) + oxm->oxm_length; } break; default: /* Unknown/unsupported action. */ *err = OFP_ERRACTION_TYPE; return (-1); } oah = swofp_lookup_action_handler(ahtype); /* Unknown/unsupported action. */ if (oah == NULL) { *err = OFP_ERRACTION_TYPE; return (-1); } ahtotal -= min(ahlen, ahtotal); if (ahtotal) { ah = (struct ofp_action_header *)((uint8_t *)ah + ahlen); goto parse_next_action; } return (0); } int swofp_flow_filter_out_port(struct ofp_instruction_actions *oia, uint32_t out_port) { struct ofp_action_header *oah; struct ofp_action_output *oao; if (oia == NULL) return (0); OFP_I_ACTIONS_FOREACH((struct ofp_instruction_actions *)oia, oah) { if (ntohs(oah->ah_type) == OFP_ACTION_OUTPUT) { oao = (struct ofp_action_output *)oah; if (ntohl(oao->ao_port) == out_port) return (1); } } return (0); } int swofp_flow_filter(struct swofp_flow_entry *swfe, uint64_t cookie, uint64_t cookie_mask, uint32_t out_port, uint32_t out_group) { if (cookie_mask != 0 && ((swfe->swfe_cookie & cookie_mask) != (cookie & cookie_mask))) return (0); if ((out_port == OFP_PORT_ANY) && (out_group == OFP_GROUP_ID_ALL)) return (1); if ((out_port != OFP_PORT_ANY) && !(swofp_flow_filter_out_port(swfe->swfe_write_actions, out_port) || swofp_flow_filter_out_port(swfe->swfe_apply_actions, out_port))) return (0); if (out_port != OFP_GROUP_ID_ALL) { /* XXX ignore group */ } return (1); } int swofp_flow_cmp_common(struct swofp_flow_entry *swfe, struct ofp_match *key, int strict) { struct ofp_match *target = swfe->swfe_match; struct ofp_oxm_class *khandler; struct ofp_ox_match *toxm, *koxm; void *kmask; int len; /* maximam payload size is size of struct in6_addr */ uint8_t dummy_unmask[sizeof(struct in6_addr)]; memset(dummy_unmask, 0, sizeof(dummy_unmask)); OFP_OXM_FOREACH(key, ntohs(key->om_length), koxm) { khandler = swofp_lookup_oxm_handler(koxm); if (khandler == NULL || khandler->oxm_match == NULL) return (0); len = khandler->oxm_len; /* * OpenFlow Switch Specification 1.3.5 says: * - An all-zero-bits oxm_mask is equivalent to omitting * the OXM TLV entirely */ if (strict && OFP_OXM_GET_HASMASK(koxm)) { kmask = (void *)((caddr_t)koxm + sizeof(*koxm) + len); if (memcmp(kmask, dummy_unmask, len) == 0) continue; } OFP_OXM_FOREACH(target, ntohs(target->om_length), toxm) { if (khandler->oxm_cmp(toxm, koxm, strict) == 0) break; } if (OFP_OXM_TERMINATED(target, ntohs(target->om_length), toxm)) return (0); } return (1); } int swofp_flow_cmp_non_strict(struct swofp_flow_entry *swfe, struct ofp_match *key) { /* Every oxm matching is wildcard */ if (key == NULL) return (1); return swofp_flow_cmp_common(swfe, key, 0); } int swofp_flow_cmp_strict(struct swofp_flow_entry *swfe, struct ofp_match *key, uint32_t priority) { struct ofp_match *target = swfe->swfe_match; struct ofp_ox_match *toxm, *koxm; int key_matches, target_matches; /* * Both target and key values are put on network byte order, * so it's ok that those are compared without changing byte order */ if (swfe->swfe_priority != priority) return (0); key_matches = target_matches = 0; OFP_OXM_FOREACH(key, ntohs(key->om_length), koxm) key_matches++; OFP_OXM_FOREACH(target, ntohs(target->om_length), toxm) target_matches++; if (key_matches != target_matches) return (0); return swofp_flow_cmp_common(swfe, key, 1); } struct swofp_flow_entry * swofp_flow_search_by_table(struct swofp_flow_table *swft, struct ofp_match *key, uint16_t priority) { struct swofp_flow_entry *swfe; LIST_FOREACH(swfe, &swft->swft_flow_list, swfe_next) { if (swofp_flow_cmp_strict(swfe, key, priority)) return (swfe); } return (NULL); } int swofp_flow_has_group(struct ofp_instruction_actions *oia, uint32_t group_id) { struct ofp_action_header *oah; struct ofp_action_group *oag; if (oia == NULL) return (0); OFP_I_ACTIONS_FOREACH((struct ofp_instruction_actions *)oia, oah) { if (ntohs(oah->ah_type) == OFP_ACTION_GROUP) { oag = (struct ofp_action_group *)oah; if (ntohl(oag->ag_group_id) == group_id) return (1); } } return (0); } void swofp_flow_delete_on_table_by_group(struct switch_softc *sc, struct swofp_flow_table *swft, uint32_t group_id) { struct swofp_flow_entry *swfe, *tswfe; LIST_FOREACH_SAFE(swfe, &swft->swft_flow_list, swfe_next, tswfe) { if (swofp_flow_has_group(swfe->swfe_apply_actions, group_id) || swofp_flow_has_group(swfe->swfe_write_actions, group_id)) { swofp_flow_entry_delete(sc, swft, swfe, OFP_FLOWREM_REASON_GROUP_DELETE); } } } void swofp_flow_delete_on_table(struct switch_softc *sc, struct swofp_flow_table *swft, struct ofp_match *key, uint16_t priority, uint64_t cookie, uint64_t cookie_mask, uint32_t out_port, uint32_t out_group, int strict) { struct swofp_flow_entry *swfe, *tswfe; LIST_FOREACH_SAFE(swfe, &swft->swft_flow_list, swfe_next, tswfe) { if (strict && !swofp_flow_cmp_strict(swfe, key, priority)) continue; else if (!swofp_flow_cmp_non_strict(swfe, key)) continue; if (!swofp_flow_filter(swfe, cookie, cookie_mask, out_port, out_group)) continue; swofp_flow_entry_delete(sc, swft, swfe, OFP_FLOWREM_REASON_DELETE); } } void swofp_ox_match_put_start(struct ofp_match *om) { om->om_type = htons(OFP_MATCH_OXM); om->om_length = htons(sizeof(*om)); } /* * Return ofp_match length include "PADDING" byte */ int swofp_ox_match_put_end(struct ofp_match *om) { int tsize = ntohs(om->om_length); int padding; padding = OFP_ALIGN(tsize) - tsize; if (padding) memset((caddr_t)om + tsize, 0, padding); return tsize + padding; } int swofp_ox_match_put_uint32(struct ofp_match *om, uint8_t type, uint32_t val) { int off = ntohs(om->om_length); struct ofp_ox_match *oxm; oxm = (struct ofp_ox_match *)((caddr_t)om + off); oxm->oxm_class = htons(OFP_OXM_C_OPENFLOW_BASIC); OFP_OXM_SET_FIELD(oxm, type); oxm->oxm_length = sizeof(uint32_t); *(uint32_t *)oxm->oxm_value = htonl(val); om->om_length = htons(ntohs(om->om_length) + sizeof(*oxm) + sizeof(uint32_t)); return ntohs(om->om_length); } int swofp_ox_match_put_uint64(struct ofp_match *om, uint8_t type, uint64_t val) { struct ofp_ox_match *oxm; int off = ntohs(om->om_length); oxm = (struct ofp_ox_match *)((caddr_t)om + off); oxm->oxm_class = htons(OFP_OXM_C_OPENFLOW_BASIC); OFP_OXM_SET_FIELD(oxm, type); oxm->oxm_length = sizeof(uint64_t); *(uint64_t *)oxm->oxm_value = htobe64(val); om->om_length = htons(ntohs(om->om_length) + sizeof(*oxm) + sizeof(uint64_t)); return ntohs(om->om_length); } int swofp_nx_match_put(struct ofp_match *om, uint8_t type, int len, caddr_t val) { struct ofp_ox_match *oxm; int off = ntohs(om->om_length); oxm = (struct ofp_ox_match *)((caddr_t)om + off); oxm->oxm_class = htons(OFP_OXM_C_NXM_1); OFP_OXM_SET_FIELD(oxm, type); oxm->oxm_length = len; memcpy((void *)oxm->oxm_value, val, len); om->om_length = htons(ntohs(om->om_length) + sizeof(*oxm) + len); return ntohs(om->om_length); } int swofp_ox_set_vlan_vid(struct switch_flow_classify *swfcl, struct ofp_ox_match *oxm) { uint16_t val; val = *(uint16_t *)oxm->oxm_value; swfcl->swfcl_vlan->vlan_vid = (val & htons(EVL_VLID_MASK)); return (0); } int swofp_ox_set_uint8(struct switch_flow_classify *swfcl, struct ofp_ox_match *oxm) { uint8_t val; val = *(uint8_t *)oxm->oxm_value; switch (OFP_OXM_GET_FIELD(oxm)) { case OFP_XM_T_IP_DSCP: if (swfcl->swfcl_ipv4) swfcl->swfcl_ipv4->ipv4_tos = ((val << 2) | (swfcl->swfcl_ipv4->ipv4_tos & IPTOS_ECN_MASK)); else swfcl->swfcl_ipv6->ipv6_tclass = ((val << 2) | (swfcl->swfcl_ipv6->ipv6_tclass & IPTOS_ECN_MASK)); break; case OFP_XM_T_IP_ECN: if (swfcl->swfcl_ipv4) swfcl->swfcl_ipv4->ipv4_tos = ((val & IPTOS_ECN_MASK) | (swfcl->swfcl_ipv4->ipv4_tos & ~IPTOS_ECN_MASK)); else swfcl->swfcl_ipv6->ipv6_tclass = ( (val & IPTOS_ECN_MASK) | (swfcl->swfcl_ipv6->ipv6_tclass & ~IPTOS_ECN_MASK)); break; case OFP_XM_T_IP_PROTO: if (swfcl->swfcl_ipv4) swfcl->swfcl_ipv4->ipv4_proto = val; else swfcl->swfcl_ipv6->ipv6_nxt = val; break; case OFP_XM_T_ICMPV4_TYPE: swfcl->swfcl_icmpv4->icmpv4_type = val; break; case OFP_XM_T_ICMPV4_CODE: swfcl->swfcl_icmpv4->icmpv4_code = val; break; case OFP_XM_T_ICMPV6_TYPE: swfcl->swfcl_icmpv6->icmpv6_type = val; break; case OFP_XM_T_ICMPV6_CODE: swfcl->swfcl_icmpv6->icmpv6_code = val; break; } return (0); } int swofp_ox_set_uint16(struct switch_flow_classify *swfcl, struct ofp_ox_match *oxm) { uint16_t val; val = *(uint16_t *)oxm->oxm_value; switch (OFP_OXM_GET_FIELD(oxm)) { case OFP_XM_T_ETH_TYPE: swfcl->swfcl_ether->eth_type = val; break; case OFP_XM_T_VLAN_PCP: swfcl->swfcl_vlan->vlan_pcp = val; break; case OFP_XM_T_TCP_SRC: swfcl->swfcl_tcp->tcp_src = val; break; case OFP_XM_T_TCP_DST: swfcl->swfcl_tcp->tcp_dst = val; break; case OFP_XM_T_UDP_SRC: swfcl->swfcl_udp->udp_src = val; break; case OFP_XM_T_UDP_DST: swfcl->swfcl_udp->udp_dst = val; break; case OFP_XM_T_ARP_OP: swfcl->swfcl_arp->_arp_op = val; } return (0); } int swofp_ox_set_uint32(struct switch_flow_classify *swfcl, struct ofp_ox_match *oxm) { uint32_t val; val = *(uint32_t *)oxm->oxm_value; switch (OFP_OXM_GET_FIELD(oxm)) { case OFP_XM_T_IPV6_FLABEL: swfcl->swfcl_ipv6->ipv6_flow_label = val; break; } return (0); } int swofp_ox_set_uint64(struct switch_flow_classify *swfcl, struct ofp_ox_match *oxm) { uint64_t val; val = *(uint64_t *)oxm->oxm_value; switch (OFP_OXM_GET_FIELD(oxm)) { case OFP_XM_T_TUNNEL_ID: /* alias OFP_XM_NXMT_TUNNEL_ID */ swfcl->swfcl_tunnel->tun_key = val; break; } return (0); } int swofp_ox_set_ipv6_addr(struct switch_flow_classify *swfcl, struct ofp_ox_match *oxm) { struct in6_addr val; memcpy(&val, oxm->oxm_value, sizeof(val)); switch (OFP_OXM_GET_FIELD(oxm)) { case OFP_XM_NXMT_TUNNEL_IPV6_SRC: swfcl->swfcl_tunnel->tun_ipv6_src = val; break; case OFP_XM_NXMT_TUNNEL_IPV6_DST: swfcl->swfcl_tunnel->tun_ipv6_dst = val; break; case OFP_XM_T_IPV6_SRC: swfcl->swfcl_ipv6->ipv6_src = val; break; case OFP_XM_T_IPV6_DST: swfcl->swfcl_ipv6->ipv6_dst = val; break; case OFP_XM_T_IPV6_ND_TARGET: swfcl->swfcl_nd6->nd6_target = val; break; } return (0); } int swofp_ox_set_ipv4_addr(struct switch_flow_classify *swfcl, struct ofp_ox_match *oxm) { uint32_t val; val = *(uint32_t *)oxm->oxm_value; switch (OFP_OXM_GET_FIELD(oxm)) { case OFP_XM_NXMT_TUNNEL_IPV4_SRC: swfcl->swfcl_tunnel->tun_ipv4_src = *(struct in_addr *)&val; break; case OFP_XM_NXMT_TUNNEL_IPV4_DST: swfcl->swfcl_tunnel->tun_ipv4_dst = *(struct in_addr *)&val; break; case OFP_XM_T_IPV4_SRC: swfcl->swfcl_ipv4->ipv4_src = val; break; case OFP_XM_T_IPV4_DST: swfcl->swfcl_ipv4->ipv4_dst = val; break; case OFP_XM_T_ARP_SPA: swfcl->swfcl_arp->arp_sip = val; break; case OFP_XM_T_ARP_TPA: swfcl->swfcl_arp->arp_tip = val; break; } return (0); } int swofp_ox_set_ether_addr(struct switch_flow_classify *swfcl, struct ofp_ox_match *oxm) { caddr_t eth_addr; eth_addr = oxm->oxm_value; switch (OFP_OXM_GET_FIELD(oxm)) { case OFP_XM_T_ETH_SRC: memcpy(swfcl->swfcl_ether->eth_src, eth_addr, ETHER_ADDR_LEN); break; case OFP_XM_T_ETH_DST: memcpy(swfcl->swfcl_ether->eth_dst, eth_addr, ETHER_ADDR_LEN); break; case OFP_XM_T_ARP_SHA: memcpy(swfcl->swfcl_arp->arp_sha, eth_addr, ETHER_ADDR_LEN); break; case OFP_XM_T_ARP_THA: memcpy(swfcl->swfcl_arp->arp_tha, eth_addr, ETHER_ADDR_LEN); break; case OFP_XM_T_IPV6_ND_TLL: case OFP_XM_T_IPV6_ND_SLL: memcpy(swfcl->swfcl_nd6->nd6_lladdr, eth_addr, ETHER_ADDR_LEN); break; } return (0); } int swofp_ox_match_ipv6_addr(struct switch_flow_classify *swfcl, struct ofp_ox_match *oxm) { struct in6_addr in, mth, mask = in6mask128; switch (OFP_OXM_GET_FIELD(oxm)) { case OFP_XM_NXMT_TUNNEL_IPV6_SRC: case OFP_XM_NXMT_TUNNEL_IPV6_DST: if (swfcl->swfcl_tunnel == NULL) return (1); break; case OFP_XM_T_IPV6_SRC: case OFP_XM_T_IPV6_DST: if (swfcl->swfcl_ipv6 == NULL) return (1); break; case OFP_XM_T_IPV6_ND_TARGET: if (swfcl->swfcl_nd6 == NULL) return (1); break; default: return (1); } switch (OFP_OXM_GET_FIELD(oxm)) { case OFP_XM_NXMT_TUNNEL_IPV6_SRC: in = swfcl->swfcl_tunnel->tun_ipv6_src; break; case OFP_XM_NXMT_TUNNEL_IPV6_DST: in = swfcl->swfcl_tunnel->tun_ipv6_dst; break; case OFP_XM_T_IPV6_SRC: in = swfcl->swfcl_ipv6->ipv6_src; break; case OFP_XM_T_IPV6_DST: in = swfcl->swfcl_ipv6->ipv6_dst; break; case OFP_XM_T_IPV6_ND_TARGET: in = swfcl->swfcl_nd6->nd6_target; break; } memcpy(&mth, oxm->oxm_value, sizeof(mth)); if (OFP_OXM_GET_HASMASK(oxm)) { memcpy(&mask, oxm->oxm_value + sizeof(mth), sizeof(mask)); in.s6_addr32[0] &= mask.s6_addr32[0]; in.s6_addr32[1] &= mask.s6_addr32[1]; in.s6_addr32[2] &= mask.s6_addr32[2]; in.s6_addr32[3] &= mask.s6_addr32[3]; mth.s6_addr32[0] &= mask.s6_addr32[0]; mth.s6_addr32[1] &= mask.s6_addr32[1]; mth.s6_addr32[2] &= mask.s6_addr32[2]; mth.s6_addr32[3] &= mask.s6_addr32[3]; } return memcmp(&in, &mth, sizeof(in)); } int swofp_ox_match_ipv4_addr(struct switch_flow_classify *swfcl, struct ofp_ox_match *oxm) { uint32_t in, mth, mask; switch (OFP_OXM_GET_FIELD(oxm)) { case OFP_XM_NXMT_TUNNEL_IPV4_SRC: case OFP_XM_NXMT_TUNNEL_IPV4_DST: if (swfcl->swfcl_tunnel == NULL) return (1); break; case OFP_XM_T_IPV4_SRC: case OFP_XM_T_IPV4_DST: if (swfcl->swfcl_ipv4 == NULL) return (1); break; case OFP_XM_T_ARP_SPA: case OFP_XM_T_ARP_TPA: if (swfcl->swfcl_arp == NULL) return (1); break; default: return (1); } switch (OFP_OXM_GET_FIELD(oxm)) { case OFP_XM_NXMT_TUNNEL_IPV4_SRC: in = swfcl->swfcl_tunnel->tun_ipv4_src.s_addr; break; case OFP_XM_NXMT_TUNNEL_IPV4_DST: in = swfcl->swfcl_tunnel->tun_ipv4_dst.s_addr; break; case OFP_XM_T_IPV4_SRC: in = swfcl->swfcl_ipv4->ipv4_src; break; case OFP_XM_T_IPV4_DST: in = swfcl->swfcl_ipv4->ipv4_dst; break; case OFP_XM_T_ARP_SPA: in = swfcl->swfcl_arp->arp_sip; break; case OFP_XM_T_ARP_TPA: in = swfcl->swfcl_arp->arp_tip; break; } memcpy(&mth, oxm->oxm_value, sizeof(uint32_t)); if (OFP_OXM_GET_HASMASK(oxm)) memcpy(&mask, oxm->oxm_value + sizeof(uint32_t), sizeof(uint32_t)); else mask = UINT32_MAX; return !((in & mask) == (mth & mask)); } int swofp_ox_match_vlan_vid(struct switch_flow_classify *swfcl, struct ofp_ox_match *oxm) { uint16_t in, mth, mask = 0; if (swfcl->swfcl_vlan == NULL) return (1); in = swfcl->swfcl_vlan->vlan_vid; memcpy(&mth, oxm->oxm_value, sizeof(uint16_t)); if (OFP_OXM_GET_HASMASK(oxm)) memcpy(&mask, oxm->oxm_value + sizeof(uint16_t), sizeof(uint16_t)); else mask = UINT16_MAX; /* * OpenFlow Switch Specification ver 1.3.5 says if oxm value * is OFP_XM_VID_NONE, matches only packets without a VLAN tag */ if (mth == htons(OFP_XM_VID_NONE)) return (1); /* * OpenFlow Switch Specification ver 1.3.5 says if oxm value and mask * is OFP_XM_VID_PRESENT, matches only packets with a VLAN tag * regardless of its value. */ if (ntohs(mth) == OFP_XM_VID_PRESENT && ntohs(mask) == OFP_XM_VID_PRESENT) return (0); in &= htons(EVL_VLID_MASK); mth &= htons(EVL_VLID_MASK); return !((in & mask) == (mth & mask)); } int swofp_ox_match_uint8(struct switch_flow_classify *swfcl, struct ofp_ox_match *oxm) { uint8_t in, mth; switch (OFP_OXM_GET_FIELD(oxm)) { case OFP_XM_T_VLAN_PCP: if (swfcl->swfcl_vlan == NULL) return (1); break; case OFP_XM_T_IP_DSCP: case OFP_XM_T_IP_ECN: case OFP_XM_T_IP_PROTO: if ((swfcl->swfcl_ipv4 == NULL && swfcl->swfcl_ipv6 == NULL)) return (1); break; case OFP_XM_T_ICMPV4_CODE: case OFP_XM_T_ICMPV4_TYPE: if (swfcl->swfcl_icmpv4 == NULL) return (1); break; case OFP_XM_T_ICMPV6_CODE: case OFP_XM_T_ICMPV6_TYPE: if (swfcl->swfcl_icmpv6 == NULL) return (1); break; default: return (1); } switch (OFP_OXM_GET_FIELD(oxm)) { case OFP_XM_T_VLAN_PCP: in = swfcl->swfcl_vlan->vlan_pcp; break; case OFP_XM_T_IP_DSCP: if (swfcl->swfcl_ipv4) in = swfcl->swfcl_ipv4->ipv4_tos >> 2; else in = swfcl->swfcl_ipv6->ipv6_tclass >> 2; break; case OFP_XM_T_IP_ECN: if (swfcl->swfcl_ipv4) in = (swfcl->swfcl_ipv4->ipv4_tos) & IPTOS_ECN_MASK; else in = (swfcl->swfcl_ipv6->ipv6_tclass) & IPTOS_ECN_MASK; break; case OFP_XM_T_IP_PROTO: if (swfcl->swfcl_ipv4) in = swfcl->swfcl_ipv4->ipv4_proto; else in = swfcl->swfcl_ipv6->ipv6_nxt; break; case OFP_XM_T_ICMPV4_CODE: in = swfcl->swfcl_icmpv4->icmpv4_code; break; case OFP_XM_T_ICMPV4_TYPE: in = swfcl->swfcl_icmpv4->icmpv4_type; break; case OFP_XM_T_ICMPV6_CODE: in = swfcl->swfcl_icmpv6->icmpv6_code; break; case OFP_XM_T_ICMPV6_TYPE: in = swfcl->swfcl_icmpv6->icmpv6_type; break; } memcpy(&mth, oxm->oxm_value, sizeof(uint8_t)); return !(in == mth); } int swofp_ox_match_uint16(struct switch_flow_classify *swfcl, struct ofp_ox_match *oxm) { uint16_t in, mth; switch (OFP_OXM_GET_FIELD(oxm)) { case OFP_XM_T_ETH_TYPE: if (swfcl->swfcl_ether == NULL) return (1); break; case OFP_XM_T_TCP_SRC: case OFP_XM_T_TCP_DST: if (swfcl->swfcl_tcp == NULL) return (1); break; case OFP_XM_T_UDP_SRC: case OFP_XM_T_UDP_DST: if (swfcl->swfcl_udp == NULL) return (1); break; case OFP_XM_T_ARP_OP: if (swfcl->swfcl_arp == NULL) return (1); break; default: return (1); } switch (OFP_OXM_GET_FIELD(oxm)) { case OFP_XM_T_ETH_TYPE: in = swfcl->swfcl_ether->eth_type; break; case OFP_XM_T_TCP_SRC: in = swfcl->swfcl_tcp->tcp_src; break; case OFP_XM_T_TCP_DST: in = swfcl->swfcl_tcp->tcp_dst; break; case OFP_XM_T_UDP_SRC: in = swfcl->swfcl_udp->udp_src; break; case OFP_XM_T_UDP_DST: in = swfcl->swfcl_udp->udp_dst; break; case OFP_XM_T_ARP_OP: in = swfcl->swfcl_arp->_arp_op; break; } memcpy(&mth, oxm->oxm_value, sizeof(uint16_t)); return !(in == mth); } int swofp_ox_match_uint32(struct switch_flow_classify *swfcl, struct ofp_ox_match *oxm) { uint32_t in, mth, mask, nomask = UINT32_MAX; switch (OFP_OXM_GET_FIELD(oxm)) { case OFP_XM_T_IN_PORT: /* in_port field is always exist in swfcl */ break; case OFP_XM_T_IPV6_FLABEL: if (swfcl->swfcl_ipv6 == NULL) return (1); break; default: return (1); } switch (OFP_OXM_GET_FIELD(oxm)) { case OFP_XM_T_IN_PORT: /* * in_port isn't network byte order becouse * it's pipeline match field. */ in = htonl(swfcl->swfcl_in_port); break; case OFP_XM_T_IPV6_FLABEL: in = swfcl->swfcl_ipv6->ipv6_flow_label; nomask &= IPV6_FLOWLABEL_MASK; break; } memcpy(&mth, oxm->oxm_value, sizeof(uint32_t)); if (OFP_OXM_GET_HASMASK(oxm)) memcpy(&mask, oxm->oxm_value + sizeof(uint32_t), sizeof(uint32_t)); else mask = nomask; return !((in & mask) == (mth & mask)); } int swofp_ox_match_uint64(struct switch_flow_classify *swfcl, struct ofp_ox_match *oxm) { uint64_t in, mth, mask; switch (OFP_OXM_GET_FIELD(oxm)) { case OFP_XM_T_META: break; case OFP_XM_T_TUNNEL_ID: if (swfcl->swfcl_tunnel == NULL) return (1); break; default: return (1); } switch (OFP_OXM_GET_FIELD(oxm)) { case OFP_XM_T_META: in = swfcl->swfcl_metadata; break; case OFP_XM_T_TUNNEL_ID: in = swfcl->swfcl_tunnel->tun_key; break; } memcpy(&mth, oxm->oxm_value, sizeof(uint64_t)); if (OFP_OXM_GET_HASMASK(oxm)) memcpy(&mask, oxm->oxm_value + sizeof(uint64_t), sizeof(uint64_t)); else mask = UINT64_MAX; return !((in & mask) == (mth & mask)); } int swofp_ox_match_ether_addr(struct switch_flow_classify *swfcl, struct ofp_ox_match *oxm) { uint64_t eth_mask = 0x0000FFFFFFFFFFFFULL; uint64_t in, mth, mask; switch (OFP_OXM_GET_FIELD(oxm)) { case OFP_XM_T_ETH_SRC: case OFP_XM_T_ETH_DST: if (swfcl->swfcl_ether == NULL) return (1); break; case OFP_XM_T_ARP_SHA: case OFP_XM_T_ARP_THA: if (swfcl->swfcl_arp == NULL) return (1); break; case OFP_XM_T_IPV6_ND_SLL: case OFP_XM_T_IPV6_ND_TLL: if (swfcl->swfcl_nd6 == NULL) return (1); break; default: return (1); } switch (OFP_OXM_GET_FIELD(oxm)) { case OFP_XM_T_ETH_SRC: in = *(uint64_t *)(swfcl->swfcl_ether->eth_src); break; case OFP_XM_T_ETH_DST: in = *(uint64_t *)(swfcl->swfcl_ether->eth_dst); break; case OFP_XM_T_ARP_SHA: in = *(uint64_t *)(swfcl->swfcl_arp->arp_sha); break; case OFP_XM_T_ARP_THA: in = *(uint64_t *)(swfcl->swfcl_arp->arp_tha); break; case OFP_XM_T_IPV6_ND_SLL: case OFP_XM_T_IPV6_ND_TLL: in = *(uint64_t *)(swfcl->swfcl_nd6->nd6_lladdr); break; } memcpy(&mth, oxm->oxm_value, ETHER_ADDR_LEN); if (OFP_OXM_GET_HASMASK(oxm)) memcpy(&mask, oxm->oxm_value + ETHER_ADDR_LEN, ETHER_ADDR_LEN); else mask = UINT64_MAX; return !((in & mask & eth_mask) == (mth & mask & eth_mask)); } int swofp_flow_match_by_swfcl(struct ofp_match *om, struct switch_flow_classify *swfcl) { struct ofp_oxm_class *oxm_handler; struct ofp_ox_match *oxm; OFP_OXM_FOREACH(om, ntohs(om->om_length), oxm) { oxm_handler = swofp_lookup_oxm_handler(oxm); if ((oxm_handler == NULL) || (oxm_handler->oxm_match == NULL)) continue; if (oxm_handler->oxm_match(swfcl, oxm)) return (1); } return (0); } /* TODO: Optimization */ struct swofp_flow_entry * swofp_flow_lookup(struct swofp_flow_table *swft, struct switch_flow_classify *swfcl) { struct swofp_flow_entry *swfe, *interim = NULL; LIST_FOREACH(swfe, &swft->swft_flow_list, swfe_next) { if (swofp_flow_match_by_swfcl(swfe->swfe_match, swfcl) != 0) continue; if (interim == NULL || (interim->swfe_priority < swfe->swfe_priority)) interim = swfe; } swft->swft_lookup_count++; if (interim) swft->swft_matched_count++; return interim; } /* * OpenFlow protocol push/pop VLAN */ /* Expand 802.1Q VLAN header from M_VLANTAG mtag if it is exist. */ struct mbuf * swofp_expand_8021q_tag(struct mbuf *m) { if ((m->m_flags & M_VLANTAG) == 0) return (m); /* H/W tagging supports only 802.1Q */ return (vlan_inject(m, ETHERTYPE_VLAN, EVL_VLANOFTAG(m->m_pkthdr.ether_vtag) | EVL_PRIOFTAG(m->m_pkthdr.ether_vtag))); } struct mbuf * swofp_action_pop_vlan(struct switch_softc *sc, struct mbuf *m, struct swofp_pipeline_desc *swpld, struct ofp_action_header *oah) { struct switch_flow_classify *swfcl = swpld->swpld_swfcl; struct ether_vlan_header *evl; struct ether_header eh; /* no vlan tag existing */ if (swfcl->swfcl_vlan == NULL) { m_freem(m); return (NULL); } if ((m->m_flags & M_VLANTAG)) { m->m_flags &= ~M_VLANTAG; return (m); } if (m->m_len < sizeof(*evl) && (m = m_pullup(m, sizeof(*evl))) == NULL) return (NULL); evl = mtod(m, struct ether_vlan_header *); if ((ntohs(evl->evl_encap_proto) != ETHERTYPE_VLAN) && (ntohs(evl->evl_encap_proto) != ETHERTYPE_QINQ)) { m_freem(m); return (NULL); } m_copydata(m, 0, ETHER_HDR_LEN, (caddr_t)&eh); eh.ether_type = evl->evl_proto; m_adj(m, sizeof(*evl)); M_PREPEND(m, sizeof(eh), M_DONTWAIT); if (m == NULL) return (NULL); m_copyback(m, 0, sizeof(eh), &eh, M_NOWAIT); /* * Update classify for vlan */ if (m->m_len < sizeof(*evl) && (m = m_pullup(m, sizeof(*evl))) == NULL) return (NULL); evl = mtod(m, struct ether_vlan_header *); if (ntohs(evl->evl_encap_proto) == ETHERTYPE_VLAN) { swfcl->swfcl_vlan->vlan_tpid = htons(ETHERTYPE_VLAN); swfcl->swfcl_vlan->vlan_vid = (evl->evl_tag & htons(EVL_VLID_MASK)); swfcl->swfcl_vlan->vlan_vid = EVL_PRIOFTAG(ntohs(evl->evl_tag)); } else { pool_put(&swfcl_pool, swfcl->swfcl_vlan); swfcl->swfcl_vlan = NULL; } return (m); } struct mbuf * swofp_action_push_vlan(struct switch_softc *sc, struct mbuf *m, struct swofp_pipeline_desc *swpld, struct ofp_action_header *oah) { struct switch_flow_classify *swfcl = swpld->swpld_swfcl; struct ofp_action_push *oap; struct ether_header *eh; struct ether_vlan_header evh; /* * Expands 802.1Q VLAN header from M_VLANTAG because switch(4) doesn't * use H/W tagging on port currently. */ m = swofp_expand_8021q_tag(m); if (m == NULL) return (NULL); oap = (struct ofp_action_push *)oah; if ((m->m_len < sizeof(*eh)) && ((m = m_pullup(m, sizeof(*eh))) == NULL)) { return (NULL); } eh = mtod(m, struct ether_header *); switch (ntohs(oap->ap_ethertype)) { case ETHERTYPE_VLAN: if ((ntohs(eh->ether_type) == ETHERTYPE_VLAN) || (ntohs(eh->ether_type) == ETHERTYPE_QINQ)) { m_freem(m); return (NULL); } break; case ETHERTYPE_QINQ: if (ntohs(eh->ether_type) != ETHERTYPE_VLAN) { m_freem(m); return (NULL); } break; default: m_freem(m); return (NULL); } if (swfcl->swfcl_vlan == NULL) { swfcl->swfcl_vlan = pool_get(&swfcl_pool, PR_NOWAIT|PR_ZERO); if (swfcl->swfcl_vlan == NULL) { m_freem(m); return (NULL); } /* puts default vlan */ swfcl->swfcl_vlan->vlan_vid = htons(1); } m_copydata(m, 0, ETHER_HDR_LEN, (caddr_t)&evh); evh.evl_proto = evh.evl_encap_proto; evh.evl_encap_proto = oap->ap_ethertype; evh.evl_tag = (swfcl->swfcl_vlan->vlan_vid | htons(swfcl->swfcl_vlan->vlan_pcp << EVL_PRIO_BITS)); m_adj(m, ETHER_HDR_LEN); M_PREPEND(m, sizeof(evh), M_DONTWAIT); if (m == NULL) return (NULL); m_copyback(m, 0, sizeof(evh), &evh, M_NOWAIT); /* * Update VLAN classification */ swfcl->swfcl_vlan->vlan_tpid = oap->ap_ethertype; swfcl->swfcl_vlan->vlan_vid = evh.evl_tag & htons(EVL_VLID_MASK); swfcl->swfcl_vlan->vlan_pcp = EVL_PRIOFTAG(ntohs(evh.evl_tag)); return (m); } /* * OpenFlow protocol packet in */ int swofp_action_output_controller(struct switch_softc *sc, struct mbuf *m0, struct swofp_pipeline_desc *swpld , uint16_t frame_max_len, uint8_t reason) { struct swofp_ofs *swofs = sc->sc_ofs; struct switch_flow_classify *swfcl = swpld->swpld_swfcl; struct ofp_packet_in *pin; struct ofp_match *om; struct ofp_ox_match *oxm; struct mbuf *m; caddr_t tail; int match_len; if (reason != OFP_PKTIN_REASON_ACTION) frame_max_len = swofs->swofs_switch_config.cfg_miss_send_len; /* * ofp_match in packet_in has only OFP_XM_T_INPORT, OFP_MX_T_META, * OFP_XM_NXMT_TUNNEL_IPV{4|6}_{SRC|DST} and OFP_MX_T_TUNNEL_ID that * if exist, so ofp_match length is determined here. */ match_len = ( sizeof(*om) + /* struct ofp_match */ (sizeof(*oxm) + sizeof(uint32_t)) + /* OFP_MX_T_IMPORT */ (sizeof(*oxm) + sizeof(uint64_t)) /* OFP_MX_T_META */ ); if (swfcl->swfcl_tunnel) { /* OFP_MX_T_TUNNEL_ID */ match_len += (sizeof(*oxm) + sizeof(uint64_t)); /* OFP_XM_NXMT_TUNNEL_IPV{4|6}_{SRC|DST} */ if (swfcl->swfcl_tunnel->tun_af == AF_INET) match_len += (sizeof(*oxm) + sizeof(uint32_t)) * 2; else if (swfcl->swfcl_tunnel->tun_af == AF_INET6) match_len += (sizeof(*oxm) + sizeof(struct in6_addr)) * 2; } MGETHDR(m, M_DONTWAIT, MT_DATA); if (m == NULL) { m_freem(m0); return (ENOBUFS); } if ((sizeof(*pin) + match_len) >= MHLEN) { MCLGET(m, M_DONTWAIT); if (m == NULL) { m_freem(m0); return (ENOBUFS); } } pin = mtod(m, struct ofp_packet_in *); memset(pin, 0, sizeof(*pin)); pin->pin_oh.oh_version = OFP_V_1_3; pin->pin_oh.oh_type = OFP_T_PACKET_IN; pin->pin_oh.oh_xid = htonl(swofs->swofs_xidnxt++); pin->pin_buffer_id = htonl(OFP_PKTOUT_NO_BUFFER); pin->pin_table_id = swpld->swpld_table_id; pin->pin_cookie = swpld->swpld_cookie; pin->pin_reason = reason; if (frame_max_len) { /* * The switch should only truncate packets if it implements * buffering or the controller might end up sending PACKET_OUT * responses with truncated packets that will eventually end * up on the network. */ if (frame_max_len < m0->m_pkthdr.len) { m_freem(m); m_freem(m0); return (EMSGSIZE); } pin->pin_total_len = htons(m0->m_pkthdr.len); } /* * It's ensured continuous memory space between ofp_mach space */ om = &pin->pin_match; swofp_ox_match_put_start(om); swofp_ox_match_put_uint32(om, OFP_XM_T_IN_PORT, swfcl->swfcl_in_port); swofp_ox_match_put_uint64(om, OFP_XM_T_META, swpld->swpld_metadata); if (swfcl->swfcl_tunnel) { swofp_ox_match_put_uint64(om, OFP_XM_T_TUNNEL_ID, be64toh(swfcl->swfcl_tunnel->tun_key)); if (swfcl->swfcl_tunnel->tun_af == AF_INET) { swofp_nx_match_put(om, OFP_XM_NXMT_TUNNEL_IPV4_SRC, sizeof(uint32_t), (caddr_t)&swfcl->swfcl_tunnel->tun_ipv4_src); swofp_nx_match_put(om, OFP_XM_NXMT_TUNNEL_IPV4_DST, sizeof(uint32_t), (caddr_t)&swfcl->swfcl_tunnel->tun_ipv4_dst); } else if (swfcl->swfcl_tunnel->tun_af == AF_INET6) { swofp_nx_match_put(om, OFP_XM_NXMT_TUNNEL_IPV6_SRC, sizeof(struct in6_addr), (caddr_t)&swfcl->swfcl_tunnel->tun_ipv6_src); swofp_nx_match_put(om, OFP_XM_NXMT_TUNNEL_IPV6_DST, sizeof(struct in6_addr), (caddr_t)&swfcl->swfcl_tunnel->tun_ipv6_dst); } } match_len = swofp_ox_match_put_end(om); /* match_len include padding */ /* * Adjust alignment for Ethernet header */ tail = (caddr_t)pin + offsetof(struct ofp_packet_in, pin_match) + match_len; memset(tail, 0, ETHER_ALIGN); m->m_len = m->m_pkthdr.len = offsetof(struct ofp_packet_in, pin_match) + match_len + ETHER_ALIGN; pin->pin_oh.oh_length = htons(m->m_pkthdr.len + ntohs(pin->pin_total_len)); if (frame_max_len) { /* m_cat() doesn't update the m_pkthdr.len */ m_cat(m, m0); m->m_pkthdr.len += ntohs(pin->pin_total_len); } (void)swofp_output(sc, m); return (0); } struct mbuf * swofp_action_output(struct switch_softc *sc, struct mbuf *m, struct swofp_pipeline_desc *swpld, struct ofp_action_header *oah) { struct ofp_action_output *oao; struct switch_port *swpo; struct mbuf *mc; m->m_pkthdr.csum_flags = 0; if ((m = swofp_apply_set_field(m, swpld)) == NULL) return (NULL); oao = (struct ofp_action_output *)oah; switch (ntohl(oao->ao_port)) { case OFP_PORT_CONTROLLER: case OFP_PORT_FLOWTABLE: if ((mc = m_dup_pkt(m, ETHER_ALIGN, M_NOWAIT)) == NULL) { m_freem(m); return (NULL); } } switch (ntohl(oao->ao_port)) { case OFP_PORT_CONTROLLER: swofp_action_output_controller(sc, mc, swpld, ntohs(oao->ao_max_len), swpld->swpld_tablemiss ? OFP_PKTIN_REASON_NO_MATCH : OFP_PKTIN_REASON_ACTION); break; case OFP_PORT_FLOWTABLE: swofp_forward_ofs(sc, swpld->swpld_swfcl, mc); break; case OFP_PORT_FLOOD: TAILQ_FOREACH(swpo, &sc->sc_swpo_list, swpo_list_next) { if (swpo->swpo_port_no != swpld->swpld_swfcl->swfcl_in_port) TAILQ_INSERT_HEAD(&swpld->swpld_fwdp_q, swpo, swpo_fwdp_next); } break; case OFP_PORT_INPUT: TAILQ_FOREACH(swpo, &sc->sc_swpo_list, swpo_list_next) { if (swpo->swpo_port_no == swpld->swpld_swfcl->swfcl_in_port) { TAILQ_INSERT_HEAD(&swpld->swpld_fwdp_q, swpo, swpo_fwdp_next); break; } } break; case OFP_PORT_NORMAL: case OFP_PORT_ALL: case OFP_PORT_ANY: /* no support yet */ break; case OFP_PORT_LOCAL: TAILQ_FOREACH(swpo, &sc->sc_swpo_list, swpo_list_next) { if (swpo->swpo_flags & IFBIF_LOCAL) { TAILQ_INSERT_HEAD(&swpld->swpld_fwdp_q, swpo, swpo_fwdp_next); break; } } break; default: TAILQ_FOREACH(swpo, &sc->sc_swpo_list, swpo_list_next) { if (swpo->swpo_port_no == ntohl(oao->ao_port)) TAILQ_INSERT_HEAD(&swpld->swpld_fwdp_q, swpo, swpo_fwdp_next); } break; } if (!TAILQ_EMPTY(&swpld->swpld_fwdp_q)) { if ((mc = m_dup_pkt(m, ETHER_ALIGN, M_NOWAIT)) == NULL) { m_freem(m); return (NULL); } switch_port_egress(sc, &swpld->swpld_fwdp_q, mc); TAILQ_INIT(&swpld->swpld_fwdp_q); } return (m); } struct mbuf * swofp_action_group_all(struct switch_softc *sc, struct mbuf *m, struct swofp_pipeline_desc *swpld, struct swofp_group_entry *swge) { struct ofp_bucket *bucket; struct ofp_action_header *ah; int actions_len; struct swofp_pipeline_desc *clean_swpld = NULL; struct switch_flow_classify swfcl; struct mbuf *n; /* Don't do anything if we don't have buckets. */ if (swge->swge_buckets == NULL) return (m); OFP_BUCKETS_FOREACH(swge->swge_buckets, swge->swge_buckets_len, bucket) { if (switch_swfcl_dup(swpld->swpld_swfcl, &swfcl) != 0) goto failed; clean_swpld = swofp_pipeline_desc_create(&swfcl); if (clean_swpld == NULL) goto failed; if ((n = m_dup_pkt(m, ETHER_ALIGN, M_NOWAIT)) == NULL) goto failed; actions_len = (ntohs(bucket->b_len) - (offsetof(struct ofp_bucket, b_actions))); OFP_ACTION_FOREACH(bucket->b_actions, actions_len, ah) { n = swofp_execute_action(sc, n, clean_swpld, ah); if (n == NULL) goto failed; } m_freem(n); swofp_pipeline_desc_destroy(clean_swpld); clean_swpld = NULL; switch_swfcl_free(&swfcl); } return (m); failed: m_freem(m); if (clean_swpld) swofp_pipeline_desc_destroy(clean_swpld); return (NULL); } struct mbuf * swofp_action_group(struct switch_softc *sc, struct mbuf *m, struct swofp_pipeline_desc *swpld, struct ofp_action_header *oah) { struct ofp_action_group *oag; struct swofp_group_entry *swge; oag = (struct ofp_action_group *)oah; swge = swofp_group_entry_lookup(sc, ntohl(oag->ag_group_id)); if (swge == NULL) { m_freem(m); return (NULL); } swge->swge_packet_count++; swge->swge_byte_count += m->m_pkthdr.len; switch (swge->swge_type) { case OFP_GROUP_T_ALL: return swofp_action_group_all(sc, m, swpld, swge); case OFP_GROUP_T_INDIRECT: case OFP_GROUP_T_FAST_FAILOVER: case OFP_GROUP_T_SELECT: m_freem(m); return (NULL); } return (m); } struct mbuf * swofp_apply_set_field_udp(struct mbuf *m, int off, struct switch_flow_classify *pre_swfcl, struct switch_flow_classify *swfcl) { struct udphdr *uh; if (m->m_len < (off + sizeof(*uh)) && (m = m_pullup(m, off + sizeof(*uh))) == NULL) return NULL; uh = (struct udphdr *)((m)->m_data + off); if (pre_swfcl->swfcl_udp) { uh->uh_sport = pre_swfcl->swfcl_udp->udp_src; uh->uh_dport = pre_swfcl->swfcl_udp->udp_dst; memcpy(swfcl->swfcl_udp, pre_swfcl->swfcl_udp, sizeof(*swfcl->swfcl_udp)); } return (m); } struct mbuf * swofp_apply_set_field_tcp(struct mbuf *m, int off, struct switch_flow_classify *pre_swfcl, struct switch_flow_classify *swfcl) { struct tcphdr *th; if (m->m_len < (off + sizeof(*th)) && (m = m_pullup(m, off + sizeof(*th))) == NULL) return NULL; th = (struct tcphdr *)((m)->m_data + off); if (pre_swfcl->swfcl_tcp) { th->th_sport = pre_swfcl->swfcl_tcp->tcp_src; th->th_dport = pre_swfcl->swfcl_tcp->tcp_dst; memcpy(swfcl->swfcl_tcp, pre_swfcl->swfcl_tcp, sizeof(*swfcl->swfcl_tcp)); } return (m); } struct mbuf * swofp_apply_set_field_nd6(struct mbuf *m, int off, struct switch_flow_classify *pre_swfcl, struct switch_flow_classify *swfcl) { struct icmp6_hdr *icmp6; struct nd_neighbor_advert *nd_na; struct nd_neighbor_solicit *nd_ns; union nd_opts ndopts; int icmp6len = m->m_pkthdr.len - off; int lladdrlen; uint8_t *lladdr; if (pre_swfcl->swfcl_nd6 == NULL) return (m); IP6_EXTHDR_GET(icmp6, struct icmp6_hdr *, m, off, sizeof(*icmp6)); if (icmp6 == NULL) goto failed; switch (icmp6->icmp6_type) { case ND_NEIGHBOR_ADVERT: if (icmp6len < sizeof(struct nd_neighbor_advert)) goto failed; break; case ND_NEIGHBOR_SOLICIT: if (icmp6len < sizeof(struct nd_neighbor_solicit)) goto failed; break; } switch (icmp6->icmp6_type) { case ND_NEIGHBOR_ADVERT: IP6_EXTHDR_GET(nd_na, struct nd_neighbor_advert *, m, off, icmp6len); if (nd_na == NULL) goto failed; nd_na->nd_na_target = pre_swfcl->swfcl_nd6->nd6_target; icmp6len -= sizeof(*nd_na); nd6_option_init(nd_na + 1, icmp6len, &ndopts); if (nd6_options(&ndopts) < 0) goto failed; if (!ndopts.nd_opts_tgt_lladdr) goto failed; lladdr = (char *)(ndopts.nd_opts_tgt_lladdr + 1); lladdrlen = (ndopts.nd_opts_tgt_lladdr->nd_opt_len << 3) - 2; /* switch(4) only supports Ethernet interfaces */ if (lladdrlen != ETHER_ADDR_LEN) goto failed; memcpy(lladdr, pre_swfcl->swfcl_nd6->nd6_lladdr, ETHER_ADDR_LEN); break; case ND_NEIGHBOR_SOLICIT: IP6_EXTHDR_GET(nd_ns, struct nd_neighbor_solicit *, m, off, icmp6len); if (nd_ns == NULL) goto failed; nd_ns->nd_ns_target = pre_swfcl->swfcl_nd6->nd6_target; icmp6len -= sizeof(*nd_ns); nd6_option_init(nd_ns + 1, icmp6len, &ndopts); if (nd6_options(&ndopts) < 0) goto failed; if (!ndopts.nd_opts_src_lladdr) goto failed; lladdr = (char *)(ndopts.nd_opts_src_lladdr + 1); lladdrlen = (ndopts.nd_opts_src_lladdr->nd_opt_len << 3) - 2; /* switch(4) only supports Ethernet interfaces */ if (lladdrlen != ETHER_ADDR_LEN) goto failed; memcpy(lladdr, pre_swfcl->swfcl_nd6->nd6_lladdr, ETHER_ADDR_LEN); break; } memcpy(swfcl->swfcl_nd6, pre_swfcl->swfcl_nd6, sizeof(*swfcl->swfcl_nd6)); return (m); failed: m_freem(m); return (NULL); } struct mbuf * swofp_apply_set_field_icmpv6(struct mbuf *m, int off, struct switch_flow_classify *pre_swfcl, struct switch_flow_classify *swfcl) { struct icmp6_hdr *icmp6; IP6_EXTHDR_GET(icmp6, struct icmp6_hdr *, m, off, sizeof(*icmp6)); if (icmp6 == NULL) return (NULL); /* m was already freed */ if (pre_swfcl->swfcl_icmpv6) { icmp6->icmp6_type = pre_swfcl->swfcl_icmpv6->icmpv6_type; icmp6->icmp6_code = pre_swfcl->swfcl_icmpv6->icmpv6_code; memcpy(swfcl->swfcl_icmpv6, pre_swfcl->swfcl_icmpv6, sizeof(*swfcl->swfcl_icmpv6)); } m->m_pkthdr.csum_flags |= M_ICMP_CSUM_OUT; switch (icmp6->icmp6_type) { case ND_NEIGHBOR_ADVERT: case ND_NEIGHBOR_SOLICIT: return swofp_apply_set_field_nd6(m, off, pre_swfcl, swfcl); } return (m); } struct mbuf * swofp_apply_set_field_icmpv4(struct mbuf *m, int off, struct switch_flow_classify *pre_swfcl, struct switch_flow_classify *swfcl) { struct icmp *icmp; if (m->m_len < (off + ICMP_MINLEN) && (m = m_pullup(m, (off + ICMP_MINLEN))) == NULL) return NULL; icmp = (struct icmp *)((m)->m_data + off); if (pre_swfcl->swfcl_icmpv4) { icmp->icmp_type = pre_swfcl->swfcl_icmpv4->icmpv4_type; icmp->icmp_code = pre_swfcl->swfcl_icmpv4->icmpv4_code; memcpy(swfcl->swfcl_icmpv4, pre_swfcl->swfcl_icmpv4, sizeof(*swfcl->swfcl_icmpv4)); } m->m_pkthdr.csum_flags |= M_ICMP_CSUM_OUT; return (m); } struct mbuf * swofp_apply_set_field_ipv6(struct mbuf *m, int off, struct switch_flow_classify *pre_swfcl, struct switch_flow_classify *swfcl) { struct ip6_hdr *ip6; int hlen; /* max size is 802.1ad header size */ u_char eh_bk[sizeof(struct ether_vlan_header) + EVL_ENCAPLEN]; if (m->m_len < (off + sizeof(*ip6)) && (m = m_pullup(m, off + sizeof(*ip6))) == NULL) return (NULL); ip6 = (struct ip6_hdr *)(mtod(m, caddr_t) + off); if (pre_swfcl->swfcl_ipv6) { /* set version, class and flow label at once */ ip6->ip6_flow = (IPV6_VERSION | (pre_swfcl->swfcl_ipv6->ipv6_flow_label & IPV6_FLOWLABEL_MASK) | htonl(pre_swfcl->swfcl_ipv6->ipv6_tclass << 20)); ip6->ip6_hlim = pre_swfcl->swfcl_ipv6->ipv6_hlimit; ip6->ip6_nxt = pre_swfcl->swfcl_ipv6->ipv6_nxt; ip6->ip6_src = pre_swfcl->swfcl_ipv6->ipv6_src; ip6->ip6_dst = pre_swfcl->swfcl_ipv6->ipv6_dst; memcpy(pre_swfcl->swfcl_ipv6, swfcl->swfcl_ipv6, sizeof(*pre_swfcl->swfcl_ipv6)); } hlen = sizeof(*ip6); switch (swfcl->swfcl_ipv6->ipv6_nxt) { case IPPROTO_UDP: m = swofp_apply_set_field_udp(m, (off + hlen), pre_swfcl, swfcl); if (m == NULL) return (NULL); m->m_pkthdr.csum_flags |= M_UDP_CSUM_OUT; break; case IPPROTO_TCP: m = swofp_apply_set_field_tcp(m, (off + hlen), pre_swfcl, swfcl); if (m == NULL) return (NULL); m->m_pkthdr.csum_flags |= M_TCP_CSUM_OUT; break; case IPPROTO_ICMPV6: m = swofp_apply_set_field_icmpv6(m, (off + hlen), pre_swfcl, swfcl); if (m == NULL) return (NULL); break; } /* * Recalculate checksums: * It doesn't use H/W offload because doesn't know to send a frame * from which interface. */ m_copydata(m, 0, off, eh_bk); m_adj(m, off); if (m->m_len < hlen && ((m = m_pullup(m, hlen)) == NULL)) return (NULL); in6_proto_cksum_out(m, NULL); M_PREPEND(m, off, M_DONTWAIT); if (m == NULL) return (NULL); m_copyback(m, 0, off, eh_bk, M_DONTWAIT); return (m); } struct mbuf * swofp_apply_set_field_ipv4(struct mbuf *m, int off, struct switch_flow_classify *pre_swfcl, struct switch_flow_classify *swfcl) { struct ip *ip; int hlen; /* max size is 802.1ad header size */ u_char eh_bk[sizeof(struct ether_vlan_header) + EVL_ENCAPLEN]; if (m->m_len < (off + sizeof(*ip)) && (m = m_pullup(m, off + sizeof(*ip))) == NULL) return (NULL); ip = (struct ip *)(mtod(m, caddr_t) + off); if (pre_swfcl->swfcl_ipv4) { ip->ip_p = pre_swfcl->swfcl_ipv4->ipv4_proto; ip->ip_tos = pre_swfcl->swfcl_ipv4->ipv4_tos; memcpy(&ip->ip_src.s_addr, &pre_swfcl->swfcl_ipv4->ipv4_src, sizeof(uint32_t)); memcpy(&ip->ip_dst.s_addr, &pre_swfcl->swfcl_ipv4->ipv4_dst, sizeof(uint32_t)); memcpy(pre_swfcl->swfcl_ipv4, swfcl->swfcl_ipv4, sizeof(*pre_swfcl->swfcl_ipv4)); } hlen = (ip->ip_hl << 2); switch (swfcl->swfcl_ipv4->ipv4_proto) { case IPPROTO_UDP: m = swofp_apply_set_field_udp(m, (off + hlen), pre_swfcl, swfcl); if (m == NULL) return (NULL); m->m_pkthdr.csum_flags |= M_UDP_CSUM_OUT; break; case IPPROTO_TCP: m = swofp_apply_set_field_tcp(m, (off + hlen), pre_swfcl, swfcl); if (m == NULL) return (NULL); m->m_pkthdr.csum_flags |= M_TCP_CSUM_OUT; break; case IPPROTO_ICMP: m = swofp_apply_set_field_icmpv4(m, (off + hlen), pre_swfcl, swfcl); if (m == NULL) return (NULL); break; } /* * Recalculate checksums: * It doesn't use H/W offload because doesn't know to send a frame * from which interface. */ m_copydata(m, 0, off, eh_bk); m_adj(m, off); if (m->m_len < hlen && ((m = m_pullup(m, hlen)) == NULL)) return (NULL); ip = mtod(m, struct ip *); ip->ip_sum = 0; in_proto_cksum_out(m, NULL); ip->ip_sum = in_cksum(m, hlen); M_PREPEND(m, off, M_DONTWAIT); if (m == NULL) return (NULL); m_copyback(m, 0, off, eh_bk, M_DONTWAIT); return (m); } struct mbuf * swofp_apply_set_field_arp( struct mbuf *m, int off, struct switch_flow_classify *pre_swfcl, struct switch_flow_classify *swfcl) { struct ether_arp *ea; if (m->m_len < (off + sizeof(*ea)) && (m = m_pullup(m, off + sizeof(*ea))) == NULL) return (NULL); ea = (struct ether_arp *)((m)->m_data + off); if (pre_swfcl->swfcl_arp) { ea->arp_op = pre_swfcl->swfcl_arp->_arp_op; memcpy(&ea->arp_sha, pre_swfcl->swfcl_arp->arp_sha, ETHER_ADDR_LEN); memcpy(&ea->arp_tha, pre_swfcl->swfcl_arp->arp_tha, ETHER_ADDR_LEN); memcpy(&ea->arp_spa, &pre_swfcl->swfcl_arp->arp_sip, sizeof(uint32_t)); memcpy(&ea->arp_tpa, &pre_swfcl->swfcl_arp->arp_tip, sizeof(uint32_t)); memcpy(swfcl->swfcl_arp, pre_swfcl->swfcl_arp, sizeof(*swfcl->swfcl_arp)); } return (m); } struct mbuf * swofp_apply_set_field_ether(struct mbuf *m, int off, struct switch_flow_classify *pre_swfcl, struct switch_flow_classify *swfcl) { struct ether_header *eh; struct ether_vlan_header *evl = NULL; uint16_t *ether_type; m = swofp_expand_8021q_tag(m); if (m == NULL) return (NULL); /* * pullup to maximum size QinQ header */ if ((m = m_pullup(m, (sizeof(*evl) + EVL_ENCAPLEN))) == NULL) return (NULL); eh = mtod(m, struct ether_header *); switch (ntohs(eh->ether_type)) { case ETHERTYPE_QINQ: off = EVL_ENCAPLEN + sizeof(struct ether_vlan_header); evl = mtod(m, struct ether_vlan_header *); ether_type = (uint16_t *)(mtod(m, caddr_t) + EVL_ENCAPLEN + offsetof(struct ether_vlan_header, evl_proto)); break; case ETHERTYPE_VLAN: off = sizeof(struct ether_vlan_header); evl = mtod(m, struct ether_vlan_header *); ether_type = &evl->evl_proto; break; default: off = sizeof(struct ether_header); ether_type = &eh->ether_type; break; } if (pre_swfcl->swfcl_vlan) { switch (ntohs(eh->ether_type)) { case ETHERTYPE_QINQ: case ETHERTYPE_VLAN: evl->evl_tag = (pre_swfcl->swfcl_vlan->vlan_vid | htons(pre_swfcl->swfcl_vlan->vlan_pcp << EVL_PRIO_BITS)); break; default: break; } /* Update the classifier if it exists. */ if (swfcl->swfcl_vlan) memcpy(swfcl->swfcl_vlan, pre_swfcl->swfcl_vlan, sizeof(*swfcl->swfcl_vlan)); } if (pre_swfcl->swfcl_ether) { memcpy(eh->ether_shost, pre_swfcl->swfcl_ether->eth_src, ETHER_ADDR_LEN); memcpy(eh->ether_dhost, pre_swfcl->swfcl_ether->eth_dst, ETHER_ADDR_LEN); *ether_type = pre_swfcl->swfcl_ether->eth_type; memcpy(swfcl->swfcl_ether, pre_swfcl->swfcl_ether, sizeof(*swfcl->swfcl_ether)); } switch (ntohs(*ether_type)) { case ETHERTYPE_ARP: return swofp_apply_set_field_arp(m, off, pre_swfcl, swfcl); case ETHERTYPE_IP: return swofp_apply_set_field_ipv4(m, off, pre_swfcl, swfcl); case ETHERTYPE_IPV6: return swofp_apply_set_field_ipv6(m, off, pre_swfcl, swfcl); case ETHERTYPE_MPLS: /* unsupported yet */ break; } return (m); } struct mbuf * swofp_apply_set_field_tunnel(struct mbuf *m, int off, struct switch_flow_classify *pre_swfcl, struct switch_flow_classify *swfcl) { struct bridge_tunneltag *brtag; if (pre_swfcl->swfcl_tunnel) { if ((brtag = bridge_tunneltag(m)) == NULL) { m_freem(m); return (NULL); } brtag->brtag_id = be64toh(pre_swfcl->swfcl_tunnel->tun_key); if (pre_swfcl->swfcl_tunnel->tun_ipv4_dst.s_addr != INADDR_ANY) { brtag->brtag_peer.sin.sin_family = brtag->brtag_local.sin.sin_family = AF_INET; brtag->brtag_local.sin.sin_addr = pre_swfcl->swfcl_tunnel->tun_ipv4_src; brtag->brtag_peer.sin.sin_addr = pre_swfcl->swfcl_tunnel->tun_ipv4_dst; } else if (!IN6_ARE_ADDR_EQUAL( &pre_swfcl->swfcl_tunnel->tun_ipv6_dst, &in6addr_any)) { brtag->brtag_peer.sin6.sin6_family = brtag->brtag_local.sin.sin_family = AF_INET6; brtag->brtag_local.sin6.sin6_addr = pre_swfcl->swfcl_tunnel->tun_ipv6_src; brtag->brtag_peer.sin6.sin6_addr = pre_swfcl->swfcl_tunnel->tun_ipv6_dst; } else { bridge_tunneluntag(m); m_freem(m); return (NULL); } /* * It can't be used by apply-action instruction. */ if (swfcl->swfcl_tunnel) { memcpy(swfcl->swfcl_tunnel, pre_swfcl->swfcl_tunnel, sizeof(*pre_swfcl->swfcl_tunnel)); } } return swofp_apply_set_field_ether(m, 0, pre_swfcl, swfcl); } struct mbuf * swofp_apply_set_field(struct mbuf *m, struct swofp_pipeline_desc *swpld) { return swofp_apply_set_field_tunnel(m, 0, &swpld->swpld_pre_swfcl, swpld->swpld_swfcl); } struct mbuf * swofp_action_set_field(struct switch_softc *sc, struct mbuf *m, struct swofp_pipeline_desc *swpld, struct ofp_action_header *oah) { struct ofp_oxm_class *oxm_handler; struct ofp_action_set_field *oasf; struct ofp_ox_match *oxm; struct switch_flow_classify *swfcl, *pre_swfcl; oasf = (struct ofp_action_set_field *)oah; oxm = (struct ofp_ox_match *)oasf->asf_field; oxm_handler = swofp_lookup_oxm_handler(oxm); if ((oxm_handler == NULL) || (oxm_handler->oxm_set == NULL)) goto failed; swfcl = swpld->swpld_swfcl; pre_swfcl = &swpld->swpld_pre_swfcl; if (oxm->oxm_class == htons(OFP_OXM_C_NXM_1)) { switch (OFP_OXM_GET_FIELD(oxm)) { case OFP_XM_NXMT_TUNNEL_ID: /* alias OFP_XM_T_TUNNEL_ID */ case OFP_XM_NXMT_TUNNEL_IPV4_SRC: case OFP_XM_NXMT_TUNNEL_IPV4_DST: case OFP_XM_NXMT_TUNNEL_IPV6_SRC: case OFP_XM_NXMT_TUNNEL_IPV6_DST: if (pre_swfcl->swfcl_tunnel) break; pre_swfcl->swfcl_tunnel = pool_get(&swfcl_pool, PR_NOWAIT|PR_ZERO); if (pre_swfcl->swfcl_tunnel == NULL) goto failed; if (swfcl->swfcl_tunnel) memcpy(pre_swfcl->swfcl_tunnel, swfcl->swfcl_tunnel, sizeof(*swfcl->swfcl_tunnel)); break; } } else { switch (OFP_OXM_GET_FIELD(oxm)) { case OFP_XM_T_ETH_SRC: case OFP_XM_T_ETH_DST: case OFP_XM_T_ETH_TYPE: if (pre_swfcl->swfcl_ether) break; pre_swfcl->swfcl_ether = pool_get(&swfcl_pool, PR_NOWAIT|PR_ZERO); if (pre_swfcl->swfcl_ether == NULL) goto failed; memcpy(pre_swfcl->swfcl_ether, swfcl->swfcl_ether, sizeof(*swfcl->swfcl_ether)); break; case OFP_XM_T_VLAN_VID: case OFP_XM_T_VLAN_PCP: if (pre_swfcl->swfcl_vlan) break; pre_swfcl->swfcl_vlan = pool_get(&swfcl_pool, PR_NOWAIT|PR_ZERO); if (pre_swfcl->swfcl_vlan == NULL) goto failed; if (swfcl->swfcl_vlan) memcpy(pre_swfcl->swfcl_vlan, swfcl->swfcl_vlan, sizeof(*swfcl->swfcl_vlan)); break; case OFP_XM_T_ARP_SHA: case OFP_XM_T_ARP_THA: case OFP_XM_T_ARP_SPA: case OFP_XM_T_ARP_TPA: case OFP_XM_T_ARP_OP: if (pre_swfcl->swfcl_arp) break; pre_swfcl->swfcl_arp = pool_get(&swfcl_pool, PR_NOWAIT|PR_ZERO); if (swfcl->swfcl_arp == NULL) goto failed; memcpy(pre_swfcl->swfcl_arp, swfcl->swfcl_arp, sizeof(*swfcl->swfcl_arp)); break; case OFP_XM_T_IP_DSCP: case OFP_XM_T_IP_ECN: case OFP_XM_T_IP_PROTO: if (swfcl->swfcl_ipv4) { if (pre_swfcl->swfcl_ipv4) break; pre_swfcl->swfcl_ipv4 = pool_get(&swfcl_pool, PR_NOWAIT|PR_ZERO); if (pre_swfcl->swfcl_ipv4 == NULL) goto failed; memcpy(pre_swfcl->swfcl_ipv4, swfcl->swfcl_ipv4, sizeof(*swfcl->swfcl_ipv4)); } else if (swfcl->swfcl_ipv6) { if (pre_swfcl->swfcl_ipv6) break; pre_swfcl->swfcl_ipv6 = pool_get(&swfcl_pool, PR_NOWAIT|PR_ZERO); if (pre_swfcl->swfcl_ipv6 == NULL) goto failed; memcpy(pre_swfcl->swfcl_ipv6, swfcl->swfcl_ipv6, sizeof(*swfcl->swfcl_ipv6)); } break; case OFP_XM_T_IPV4_SRC: case OFP_XM_T_IPV4_DST: if (pre_swfcl->swfcl_ipv4) break; pre_swfcl->swfcl_ipv4 = pool_get(&swfcl_pool, PR_NOWAIT|PR_ZERO); if (pre_swfcl->swfcl_ipv4 == NULL) goto failed; memcpy(pre_swfcl->swfcl_ipv4, swfcl->swfcl_ipv4, sizeof(*swfcl->swfcl_ipv4)); break; case OFP_XM_T_IPV6_SRC: case OFP_XM_T_IPV6_DST: case OFP_XM_T_IPV6_FLABEL: if (pre_swfcl->swfcl_ipv6) break; pre_swfcl->swfcl_ipv6 = pool_get(&swfcl_pool, PR_NOWAIT|PR_ZERO); if (pre_swfcl->swfcl_ipv6 == NULL) goto failed; memcpy(pre_swfcl->swfcl_ipv6, swfcl->swfcl_ipv6, sizeof(*swfcl->swfcl_ipv6)); break; case OFP_XM_T_UDP_SRC: case OFP_XM_T_UDP_DST: if (pre_swfcl->swfcl_udp) break; pre_swfcl->swfcl_udp = pool_get(&swfcl_pool, PR_NOWAIT|PR_ZERO); if (pre_swfcl->swfcl_udp == NULL) goto failed; memcpy(pre_swfcl->swfcl_udp, swfcl->swfcl_udp, sizeof(*swfcl->swfcl_udp)); break; case OFP_XM_T_TCP_SRC: case OFP_XM_T_TCP_DST: if (pre_swfcl->swfcl_tcp) break; pre_swfcl->swfcl_tcp = pool_get(&swfcl_pool, PR_NOWAIT|PR_ZERO); if (pre_swfcl->swfcl_tcp == NULL) goto failed; memcpy(pre_swfcl->swfcl_tcp, swfcl->swfcl_tcp, sizeof(*swfcl->swfcl_tcp)); break; case OFP_XM_T_ICMPV4_CODE: case OFP_XM_T_ICMPV4_TYPE: if (pre_swfcl->swfcl_icmpv4) break; pre_swfcl->swfcl_icmpv4 = pool_get(&swfcl_pool, PR_NOWAIT|PR_ZERO); if (pre_swfcl->swfcl_icmpv4 == NULL) goto failed; memcpy(pre_swfcl->swfcl_icmpv4, swfcl->swfcl_icmpv4, sizeof(*swfcl->swfcl_icmpv4)); break; case OFP_XM_T_ICMPV6_CODE: case OFP_XM_T_ICMPV6_TYPE: if (pre_swfcl->swfcl_icmpv6) break; pre_swfcl->swfcl_icmpv6 = pool_get(&swfcl_pool, PR_NOWAIT|PR_ZERO); if (pre_swfcl->swfcl_icmpv6 == NULL) goto failed; memcpy(pre_swfcl->swfcl_icmpv6, swfcl->swfcl_icmpv6, sizeof(*swfcl->swfcl_icmpv6)); break; case OFP_XM_T_IPV6_ND_SLL: case OFP_XM_T_IPV6_ND_TLL: case OFP_XM_T_IPV6_ND_TARGET: if (pre_swfcl->swfcl_nd6) break; pre_swfcl->swfcl_nd6 = pool_get(&swfcl_pool, PR_NOWAIT|PR_ZERO); if (pre_swfcl->swfcl_nd6 == NULL) goto failed; memcpy(pre_swfcl->swfcl_nd6, swfcl->swfcl_nd6, sizeof(*swfcl->swfcl_nd6)); break; case OFP_XM_T_TUNNEL_ID: /* alias OFP_XM_T_TUNNEL_ID */ if (pre_swfcl->swfcl_tunnel) break; pre_swfcl->swfcl_tunnel = pool_get(&swfcl_pool, PR_NOWAIT|PR_ZERO); if (pre_swfcl->swfcl_tunnel == NULL) goto failed; if (swfcl->swfcl_tunnel) memcpy(pre_swfcl->swfcl_tunnel, swfcl->swfcl_tunnel, sizeof(*swfcl->swfcl_tunnel)); break; } } if (oxm_handler->oxm_set(pre_swfcl, oxm)) goto failed; return (m); failed: m_freem(m); return (NULL); } struct mbuf * swofp_execute_action(struct switch_softc *sc, struct mbuf *m, struct swofp_pipeline_desc *swpld, struct ofp_action_header *oah) { struct ofp_action_handler *handler; handler = swofp_lookup_action_handler(ntohs(oah->ah_type)); if ((handler == NULL) || (handler->action == NULL)) { DPRINTF(sc, "unknown action (type %d)\n", ntohs(oah->ah_type)); m_freem(m); return (NULL); } m = handler->action(sc, m, swpld, oah); if (m == NULL) return (NULL); return (m); } struct mbuf * swofp_execute_action_set_field(struct switch_softc *sc, struct mbuf *m, struct swofp_pipeline_desc *swpld, struct ofp_action_header *oah) { struct ofp_action_header **set_fields; int i; set_fields = (struct ofp_action_header **)oah; for (i = 0; i < OFP_XM_T_MAX; i++) { if (set_fields[i] == NULL) continue; m = swofp_execute_action(sc, m, swpld, set_fields[i]); if (m == NULL) return (NULL); } return (m); } struct mbuf * swofp_execute_action_set(struct switch_softc *sc, struct mbuf *m, struct swofp_pipeline_desc *swpld) { struct swofp_action_set *swas; int i; TAILQ_INIT(&swpld->swpld_fwdp_q); swas = swpld->swpld_action_set; swpld->swpld_swfcl->swfcl_cookie = UINT64_MAX; for (i = 0 ; i < nitems(ofp_action_handlers); i++) { if (swas[i].swas_action == NULL) continue; if (swas[i].swas_type == OFP_ACTION_SET_FIELD) m = swofp_execute_action_set_field(sc, m, swpld, swas[i].swas_action); else m = swofp_execute_action(sc, m, swpld, swas[i].swas_action); if (m == NULL) break; } m_freem(m); return (NULL); } struct mbuf * swofp_apply_actions(struct switch_softc *sc, struct mbuf *m, struct swofp_pipeline_desc *swpld, struct ofp_instruction_actions *oia) { struct ofp_action_header *oah; TAILQ_INIT(&swpld->swpld_fwdp_q); OFP_I_ACTIONS_FOREACH(oia, oah) { m = swofp_execute_action(sc, m, swpld, oah); if (m == NULL) return (NULL); } return (m); } struct swofp_action_set * swofp_lookup_action_set(struct swofp_pipeline_desc *swpld, uint16_t type) { int i; for (i = 0; i < nitems(ofp_action_handlers); i ++) { if (swpld->swpld_action_set[i].swas_type == type) return (&swpld->swpld_action_set[i]); } return (NULL); } void swofp_write_actions_set_field(struct swofp_action_set *swas, struct ofp_action_header *oah) { struct ofp_action_header **set_fields; struct ofp_action_set_field *oasf; struct ofp_ox_match *oxm; set_fields = (struct ofp_action_header **)swas->swas_action; oasf = (struct ofp_action_set_field *)oah; oxm = (struct ofp_ox_match *)oasf->asf_field; set_fields[OFP_OXM_GET_FIELD(oxm)] = oah; } int swofp_write_actions(struct ofp_instruction_actions *oia, struct swofp_pipeline_desc *swpld) { struct swofp_action_set *swas; struct ofp_action_header *oah; OFP_I_ACTIONS_FOREACH(oia, oah) { swas = swofp_lookup_action_set(swpld, ntohs(oah->ah_type)); if (swas == NULL) return (ENOENT); if (ntohs(oah->ah_type) == OFP_ACTION_SET_FIELD) swofp_write_actions_set_field(swas, oah); else swas->swas_action = oah; } return (0); } void swofp_clear_actions_set_field(struct swofp_action_set *swas, struct ofp_action_header *oah) { struct ofp_action_header **set_fields; struct ofp_action_set_field *oasf; struct ofp_ox_match *oxm; set_fields = (struct ofp_action_header **)swas->swas_action; oasf = (struct ofp_action_set_field *)oah; oxm = (struct ofp_ox_match *)oasf->asf_field; set_fields[OFP_OXM_GET_FIELD(oxm)] = NULL; } int swofp_clear_actions(struct ofp_instruction_actions *oia, struct swofp_pipeline_desc *swpld) { struct swofp_action_set *swas; struct ofp_action_header *oah; OFP_I_ACTIONS_FOREACH(oia, oah) { swas = swofp_lookup_action_set(swpld, ntohs(oah->ah_type)); if (swas == NULL) return (ENOENT); if (ntohs(oah->ah_type) == OFP_ACTION_SET_FIELD) swofp_clear_actions_set_field(swas, oah); else swas->swas_action = NULL; } return (0); } void swofp_write_metadata(struct ofp_instruction_write_metadata *iowm, struct swofp_pipeline_desc *swpld) { uint64_t val, mask; val = iowm->iwm_metadata; mask = iowm->iwm_metadata_mask; swpld->swpld_metadata = (val & mask); } void swofp_forward_ofs(struct switch_softc *sc, struct switch_flow_classify *swfcl, struct mbuf *m) { struct swofp_ofs *ofs = sc->sc_ofs; struct swofp_flow_entry *swfe; struct swofp_flow_table *swft; struct swofp_pipeline_desc *swpld; int error; uint8_t next_table_id = 0; swpld = swofp_pipeline_desc_create(swfcl); if (swpld == NULL) { m_freem(m); return; } TAILQ_FOREACH(swft, &ofs->swofs_table_list, swft_table_next) { if (swft->swft_table_id != next_table_id) continue; /* XXX * The metadata is pipeline parameters but it uses same match * framework for matching so it is copy to flow classify. */ swpld->swpld_swfcl->swfcl_metadata = swpld->swpld_metadata; if ((swfe = swofp_flow_lookup(swft, swpld->swpld_swfcl)) == NULL) break; /* Set pipeline parameters */ swpld->swpld_cookie = swfe->swfe_cookie; swpld->swpld_table_id = swft->swft_table_id; swpld->swpld_tablemiss = swfe->swfe_tablemiss; /* Update statistics */ nanouptime(&swfe->swfe_idle_time); swfe->swfe_packet_cnt++; swfe->swfe_byte_cnt += m->m_pkthdr.len; if (swfe->swfe_meter) { /* TODO: Here is meter instruction */ } if (swfe->swfe_apply_actions) { m = swofp_apply_actions(sc, m, swpld, swfe->swfe_apply_actions); if (m == NULL) goto out; } if (swfe->swfe_clear_actions) { error = swofp_clear_actions( swfe->swfe_clear_actions, swpld); if (error) goto out; } if (swfe->swfe_write_actions) { error = swofp_write_actions( swfe->swfe_write_actions, swpld); if (error) goto out; } if (swfe->swfe_write_metadata) swofp_write_metadata(swfe->swfe_write_metadata, swpld); if (swfe->swfe_goto_table) next_table_id = swfe->swfe_goto_table->igt_table_id; else break; } m = swofp_execute_action_set(sc, m, swpld); out: m_freem(m); swofp_pipeline_desc_destroy(swpld); } int swofp_input(struct switch_softc *sc, struct mbuf *m) { struct swofp_ofs *swofs = sc->sc_ofs; struct ofp_header *oh; ofp_msg_handler handler; uint16_t ohlen; if (m->m_len < sizeof(*oh) && (m = m_pullup(m, sizeof(*oh))) == NULL) return (ENOBUFS); oh = mtod(m, struct ofp_header *); ohlen = ntohs(oh->oh_length); /* Validate that we have a sane header. */ if (ohlen < sizeof(*oh)) { swofp_send_error(sc, m, OFP_ERRTYPE_BAD_REQUEST, OFP_ERRREQ_BAD_LEN); return (0); } if (m->m_len < ohlen && (m = m_pullup(m, ohlen)) == NULL) return (ENOBUFS); #if NBPFILTER > 0 if (sc->sc_ofbpf) switch_mtap(sc->sc_ofbpf, m, BPF_DIRECTION_IN, swofs->swofs_datapath_id); #endif handler = swofp_lookup_msg_handler(oh->oh_type); if (handler) (*handler)(sc, m); else swofp_send_error(sc, m, OFP_ERRTYPE_BAD_REQUEST, OFP_ERRREQ_TYPE); return (0); } int swofp_output(struct switch_softc *sc, struct mbuf *m) { struct swofp_ofs *swofs = sc->sc_ofs; if (sc->sc_swdev == NULL) { m_freem(m); return (ENXIO); } #if NBPFILTER > 0 if (sc->sc_ofbpf) switch_mtap(sc->sc_ofbpf, m, BPF_DIRECTION_OUT, swofs->swofs_datapath_id); #endif if (sc->sc_swdev->swdev_output(sc, m) != 0) return (ENOBUFS); return (0); } /* * OpenFlow protocol HELLO message handler */ int swofp_recv_hello(struct switch_softc *sc, struct mbuf *m) { struct ofp_header *oh; oh = mtod(m, struct ofp_header *); if (oh->oh_version != OFP_V_1_3) swofp_send_error(sc, m, OFP_ERRTYPE_HELLO_FAILED, OFP_ERRHELLO_INCOMPATIBLE); else m_freem(m); return (0); } void swofp_send_hello(struct switch_softc *sc) { struct swofp_ofs *swofs = sc->sc_ofs; struct mbuf *m; struct ofp_header *oh; MGETHDR(m, M_DONTWAIT, MT_DATA); if (m == NULL) return; /* XXX */ oh = mtod(m, struct ofp_header *); oh->oh_version = OFP_V_1_3; oh->oh_type = OFP_T_HELLO; oh->oh_length = htons(sizeof(*oh)); oh->oh_xid = htonl(swofs->swofs_xidnxt++); m->m_len = m->m_pkthdr.len = sizeof(*oh); (void)swofp_output(sc, m); } /* * OpenFlow protocol Error message */ void swofp_send_error(struct switch_softc *sc, struct mbuf *m, uint16_t type, uint16_t code) { struct ofp_error *oe; uint16_t len; uint8_t data[OFP_ERRDATA_MAX]; /* Reuse mbuf from request message */ oe = mtod(m, struct ofp_error *); /* Save data for the response and copy back later. */ len = min(ntohs(oe->err_oh.oh_length), OFP_ERRDATA_MAX); m_copydata(m, 0, len, data); oe->err_oh.oh_version = OFP_V_1_3; oe->err_oh.oh_type = OFP_T_ERROR; oe->err_type = htons(type); oe->err_code = htons(code); oe->err_oh.oh_length = htons(len + sizeof(struct ofp_error)); m->m_len = m->m_pkthdr.len = sizeof(struct ofp_error); if (m_copyback(m, sizeof(struct ofp_error), len, data, M_DONTWAIT)) { m_freem(m); return; } (void)swofp_output(sc, m); } /* * OpenFlow protocol Echo message */ int swofp_recv_echo(struct switch_softc *sc, struct mbuf *m) { return swofp_send_echo(sc, m); } int swofp_send_echo(struct switch_softc *sc, struct mbuf *m) { struct ofp_header *oh; oh = mtod(m, struct ofp_header *); oh->oh_type = OFP_T_ECHO_REPLY; return (swofp_output(sc, m)); } /* * Feature request handler */ int swofp_recv_features_req(struct switch_softc *sc, struct mbuf *m) { struct swofp_ofs *swofs = sc->sc_ofs; struct ofp_header *oh; struct ofp_switch_features swf; oh = mtod(m, struct ofp_header *); memset(&swf, 0, sizeof(swf)); memcpy(&swf, oh, sizeof(*oh)); swf.swf_oh.oh_type = OFP_T_FEATURES_REPLY; swf.swf_oh.oh_length = htons(sizeof(swf)); swf.swf_datapath_id = htobe64(swofs->swofs_datapath_id); swf.swf_nbuffers = htonl(0); /* no buffer now */ swf.swf_ntables = OFP_TABLE_ID_MAX; swf.swf_aux_id = 0; swf.swf_capabilities = htonl(OFP_SWCAP_FLOW_STATS | OFP_SWCAP_TABLE_STATS | OFP_SWCAP_PORT_STATS | OFP_SWCAP_GROUP_STATS); m_copyback(m, 0, sizeof(swf), (caddr_t)&swf, M_WAIT); return (swofp_output(sc, m)); } /* * Get config handler */ int swofp_recv_config_req(struct switch_softc *sc, struct mbuf *m) { struct swofp_ofs *swofs = sc->sc_ofs; struct ofp_switch_config osc; memcpy(&osc.cfg_oh, mtod(m, caddr_t), sizeof(struct ofp_header)); osc.cfg_oh.oh_type = OFP_T_GET_CONFIG_REPLY; osc.cfg_oh.oh_length = htons(sizeof(osc)); osc.cfg_flags = htons(swofs->swofs_switch_config.cfg_flags); osc.cfg_miss_send_len = htons(swofs->swofs_switch_config.cfg_miss_send_len); if (m_copyback(m, 0, sizeof(osc), &osc, M_NOWAIT)) { m_freem(m); return (-1); } return (swofp_output(sc, m)); } /* * Set config handler */ int swofp_recv_set_config(struct switch_softc *sc, struct mbuf *m) { struct swofp_ofs *swofs = sc->sc_ofs; struct ofp_switch_config *swc; swc = mtod(m, struct ofp_switch_config *); if (ntohs(swc->cfg_oh.oh_length) < sizeof(*swc)) { swofp_send_error(sc, m, OFP_ERRTYPE_BAD_REQUEST, OFP_ERRREQ_BAD_LEN); return (-1); } /* * Support only "normal" fragment handle */ swofs->swofs_switch_config.cfg_flags = OFP_CONFIG_FRAG_NORMAL; swofs->swofs_switch_config.cfg_miss_send_len = ntohs(swc->cfg_miss_send_len); m_freem(m); return (0); } /* * OpenFlow protocol FLOW REMOVE message handlers */ int swofp_send_flow_removed(struct switch_softc *sc, struct swofp_flow_entry *swfe, uint8_t reason) { struct ofp_flow_removed *ofr; struct timespec now, duration; struct mbuf *m; int match_len; match_len = ntohs(swfe->swfe_match->om_length); MGETHDR(m, M_WAITOK, MT_DATA); if (m == NULL) return (ENOBUFS); if ((sizeof(*ofr) + match_len) >= MHLEN) { MCLGET(m, M_WAITOK); if (m == NULL) return (ENOBUFS); } ofr = mtod(m, struct ofp_flow_removed *); ofr->fr_oh.oh_version = OFP_V_1_3; ofr->fr_oh.oh_type = OFP_T_FLOW_REMOVED; ofr->fr_oh.oh_xid = htonl(sc->sc_ofs->swofs_xidnxt++); ofr->fr_cookie = htobe64(swfe->swfe_cookie); ofr->fr_priority = htons(swfe->swfe_priority); ofr->fr_reason = reason; ofr->fr_table_id = swfe->swfe_table_id; nanouptime(&now); timespecsub(&now, &swfe->swfe_installed_time, &duration); ofr->fr_duration_sec = ntohl((int)duration.tv_sec); ofr->fr_priority = htons(swfe->swfe_priority); ofr->fr_idle_timeout = htons(swfe->swfe_idle_timeout); ofr->fr_hard_timeout = htons(swfe->swfe_hard_timeout); ofr->fr_byte_count = htobe64(swfe->swfe_byte_cnt); ofr->fr_packet_count = htobe64(swfe->swfe_packet_cnt); memcpy(&ofr->fr_match, swfe->swfe_match, match_len); /* match_len inclusive ofp_match header length*/ ofr->fr_oh.oh_length = htons(sizeof(*ofr) + match_len - sizeof(struct ofp_match)); m->m_len = m->m_pkthdr.len = sizeof(*ofr) + match_len - sizeof(struct ofp_match); return (swofp_output(sc, m)); } /* * OpenFlow protocol FLOW MOD message handlers */ int swofp_flow_entry_put_instructions(struct switch_softc *sc, struct mbuf *m, struct swofp_flow_entry *swfe, uint16_t *etype, uint16_t *error) { struct ofp_flow_mod *ofm; struct ofp_instruction *oi; caddr_t inst; int start, len, off; *etype = OFP_ERRTYPE_BAD_INSTRUCTION; ofm = mtod(m, struct ofp_flow_mod *); /* * Clear instructions from flow entry. It's necessary to only modify * flow but it's no problem to clear on adding flow because the flow * entry doesn't have any instructions. So it's always called. */ swofp_flow_entry_instruction_free(swfe); start = OFP_FLOW_MOD_MSG_INSTRUCTION_OFFSET(ofm); len = ntohs(ofm->fm_oh.oh_length) - start; for (off = start; off < start + len; off += ntohs(oi->i_len)) { oi = (struct ofp_instruction *)(mtod(m, caddr_t) + off); if (swofp_validate_flow_instruction(sc, oi, len - (off - start), etype, error)) return (-1); if ((inst = malloc(ntohs(oi->i_len), M_DEVBUF, M_DONTWAIT|M_ZERO)) == NULL) { *error = OFP_ERRFLOWMOD_UNKNOWN; return (-1); } memcpy(inst, oi, ntohs(oi->i_len)); switch (ntohs(oi->i_type)) { case OFP_INSTRUCTION_T_GOTO_TABLE: if (swfe->swfe_goto_table) free(swfe->swfe_goto_table, M_DEVBUF, ntohs(swfe->swfe_goto_table->igt_len)); swfe->swfe_goto_table = (struct ofp_instruction_goto_table *)inst; break; case OFP_INSTRUCTION_T_WRITE_META: if (swfe->swfe_write_metadata) free(swfe->swfe_write_metadata, M_DEVBUF, ntohs(swfe->swfe_write_metadata->iwm_len)); swfe->swfe_write_metadata = (struct ofp_instruction_write_metadata *)inst; break; case OFP_INSTRUCTION_T_WRITE_ACTIONS: if (swfe->swfe_write_actions) free(swfe->swfe_write_actions, M_DEVBUF, ntohs(swfe->swfe_write_actions->ia_len)); swfe->swfe_write_actions = (struct ofp_instruction_actions *)inst; break; case OFP_INSTRUCTION_T_APPLY_ACTIONS: if (swfe->swfe_apply_actions) free(swfe->swfe_apply_actions, M_DEVBUF, ntohs(swfe->swfe_apply_actions->ia_len)); swfe->swfe_apply_actions = (struct ofp_instruction_actions *)inst; break; case OFP_INSTRUCTION_T_CLEAR_ACTIONS: if (swfe->swfe_clear_actions) free(swfe->swfe_clear_actions, M_DEVBUF, ntohs(swfe->swfe_clear_actions->ia_len)); swfe->swfe_clear_actions = (struct ofp_instruction_actions *)inst; break; case OFP_INSTRUCTION_T_METER: if (swfe->swfe_meter) free(swfe->swfe_meter, M_DEVBUF, ntohs(swfe->swfe_meter->im_len)); swfe->swfe_meter = (struct ofp_instruction_meter *)inst; break; case OFP_INSTRUCTION_T_EXPERIMENTER: if (swfe->swfe_experimenter) free(swfe->swfe_experimenter, M_DEVBUF, ntohs(swfe->swfe_experimenter->ie_len)); swfe->swfe_experimenter = (struct ofp_instruction_experimenter *)inst; break; default: free(inst, M_DEVBUF, ntohs(oi->i_len)); break; } } return (0); } int swofp_flow_mod_cmd_add(struct switch_softc *sc, struct mbuf *m) { struct swofp_ofs *ofs = sc->sc_ofs; struct ofp_flow_mod *ofm; struct ofp_match *om; struct swofp_flow_entry *swfe, *old_swfe; struct swofp_flow_table *swft; int omlen; uint16_t error, etype; etype = OFP_ERRTYPE_FLOW_MOD_FAILED; ofm = mtod(m, struct ofp_flow_mod *); om = &ofm->fm_match; if (OFP_TABLE_ID_MAX < ofm->fm_table_id) { error = OFP_ERRFLOWMOD_TABLE_ID; goto ofp_error; } if (ofm->fm_cookie == UINT64_MAX) { /* XXX What is best error code? */ error = OFP_ERRFLOWMOD_UNKNOWN; goto ofp_error; } omlen = ntohs(om->om_length); /* * 1) ofp_match header must have at least its own size, * otherwise memcpy() will fail later; * 2) OXM filters can't be bigger than the packet. */ if (omlen < sizeof(*om) || omlen >= (m->m_len - sizeof(*ofm))) { etype = OFP_ERRTYPE_BAD_MATCH; error = OFP_ERRMATCH_BAD_LEN; goto ofp_error; } if ((swft = swofp_flow_table_add(sc, ofm->fm_table_id)) == NULL) { error = OFP_ERRFLOWMOD_TABLE_ID; goto ofp_error; } if (swft->swft_flow_num >= ofs->swofs_flow_max_entry) { error = OFP_ERRFLOWMOD_TABLE_FULL; goto ofp_error; } /* Validate that the OXM are in-place and correct. */ if (swofp_validate_flow_match(om, &error)) { etype = OFP_ERRTYPE_BAD_MATCH; goto ofp_error; } if ((old_swfe = swofp_flow_search_by_table(swft, om, ntohs(ofm->fm_priority)))) { if (ntohs(ofm->fm_flags) & OFP_FLOWFLAG_CHECK_OVERLAP) { error = OFP_ERRFLOWMOD_OVERLAP; goto ofp_error; } } if ((swfe = malloc(sizeof(*swfe), M_DEVBUF, M_DONTWAIT|M_ZERO)) == NULL) { error = OFP_ERRFLOWMOD_UNKNOWN; goto ofp_error; } swfe->swfe_priority = ntohs(ofm->fm_priority); swfe->swfe_cookie = be64toh(ofm->fm_cookie); swfe->swfe_flags = ntohs(ofm->fm_flags); swfe->swfe_idle_timeout = ntohs(ofm->fm_idle_timeout); swfe->swfe_hard_timeout = ntohs(ofm->fm_hard_timeout); nanouptime(&swfe->swfe_installed_time); nanouptime(&swfe->swfe_idle_time); if ((swfe->swfe_match = malloc(omlen, M_DEVBUF, M_DONTWAIT|M_ZERO)) == NULL) { error = OFP_ERRFLOWMOD_UNKNOWN; goto ofp_error_free_flow; } memcpy(swfe->swfe_match, om, omlen); /* * If the ofp_match structure is empty and priority is zero, then * this is a special flow type called table-miss which is the last * flow to match. */ if (omlen == sizeof(*om) && swfe->swfe_priority == 0) swfe->swfe_tablemiss = 1; if (swofp_flow_entry_put_instructions(sc, m, swfe, &etype, &error)) goto ofp_error_free_flow; if (old_swfe) { if (!(ntohs(ofm->fm_flags) & OFP_FLOWFLAG_RESET_COUNTS)) { swfe->swfe_packet_cnt = old_swfe->swfe_packet_cnt; swfe->swfe_byte_cnt = old_swfe->swfe_byte_cnt; } /* * Doesn't need to send flow remove message because * this deleted flow cause by internal reason */ swfe->swfe_flags &= ~(OFP_FLOWFLAG_SEND_FLOW_REMOVED); swofp_flow_entry_delete(sc, swft, old_swfe, OFP_FLOWREM_REASON_DELETE); } swofp_flow_entry_add(sc, swft, swfe); m_freem(m); return (0); ofp_error_free_flow: swofp_flow_entry_free(&swfe); ofp_error: swofp_send_error(sc, m, etype, error); return (0); } int swofp_flow_mod_cmd_common_modify(struct switch_softc *sc, struct mbuf *m, int strict) { struct ofp_flow_mod *ofm; struct ofp_match *om; struct swofp_flow_entry *swfe; struct swofp_flow_table *swft; int omlen; uint16_t error, etype; etype = OFP_ERRTYPE_FLOW_MOD_FAILED; ofm = mtod(m, struct ofp_flow_mod *); om = &ofm->fm_match; if (OFP_TABLE_ID_MAX < ofm->fm_table_id) { error = OFP_ERRFLOWMOD_TABLE_ID; goto ofp_error; } if (ofm->fm_cookie == UINT64_MAX) { /* XXX What is best error code? */ error = OFP_ERRFLOWMOD_UNKNOWN; goto ofp_error; } omlen = ntohs(om->om_length); /* * 1) ofp_match header must have at least its own size, * otherwise memcpy() will fail later; * 2) OXM filters can't be bigger than the packet. */ if (omlen < sizeof(*om) || omlen >= (m->m_len - sizeof(*ofm))) { etype = OFP_ERRTYPE_BAD_MATCH; error = OFP_ERRMATCH_BAD_LEN; goto ofp_error; } /* Validate that the OXM are in-place and correct. */ if (swofp_validate_flow_match(om, &error)) { etype = OFP_ERRTYPE_BAD_MATCH; goto ofp_error; } if ((swft = swofp_flow_table_lookup(sc, ofm->fm_table_id)) == NULL) { error = OFP_ERRFLOWMOD_TABLE_ID; goto ofp_error; } LIST_FOREACH(swfe, &swft->swft_flow_list, swfe_next) { if (strict && !swofp_flow_cmp_strict(swfe, om, ntohs(ofm->fm_priority))) continue; else if (!swofp_flow_cmp_non_strict(swfe, om)) continue; if (!swofp_flow_filter(swfe, be64toh(ofm->fm_cookie), be64toh(ofm->fm_cookie_mask), ntohl(ofm->fm_out_port), ntohl(ofm->fm_out_group))) continue; if (swofp_flow_entry_put_instructions(sc, m, swfe, &etype, &error)) { /* * If error occurs in swofp_flow_entry_put_instructions, * the flow entry might be half-way modified. So the * flow entry is delete here. */ swofp_flow_entry_delete(sc, swft, swfe, OFP_FLOWREM_REASON_DELETE); etype = OFP_ERRTYPE_BAD_INSTRUCTION; goto ofp_error; } if (ntohs(ofm->fm_flags) & OFP_FLOWFLAG_RESET_COUNTS) { swfe->swfe_packet_cnt = 0; swfe->swfe_byte_cnt = 0; } } m_freem(m); return (0); ofp_error: swofp_send_error(sc, m, etype, error); return (0); } int swofp_flow_mod_cmd_modify(struct switch_softc *sc, struct mbuf *m) { return swofp_flow_mod_cmd_common_modify(sc, m, 0); } int swofp_flow_mod_cmd_modify_strict(struct switch_softc *sc, struct mbuf *m) { return swofp_flow_mod_cmd_common_modify(sc, m, 1); } int swofp_flow_mod_cmd_common_delete(struct switch_softc *sc, struct mbuf *m, int strict) { struct swofp_ofs *ofs = sc->sc_ofs; struct ofp_flow_mod *ofm; struct ofp_match *om; struct swofp_flow_table *swft; int omlen; uint16_t error, etype = OFP_ERRTYPE_FLOW_MOD_FAILED; ofm = (struct ofp_flow_mod *)(mtod(m, caddr_t)); om = &ofm->fm_match; omlen = ntohs(om->om_length); /* * 1) ofp_match header must have at least its own size, * otherwise memcpy() will fail later; * 2) OXM filters can't be bigger than the packet. */ if (omlen < sizeof(*om) || omlen >= (m->m_len - sizeof(*ofm))) { etype = OFP_ERRTYPE_BAD_MATCH; error = OFP_ERRMATCH_BAD_LEN; goto ofp_error; } /* Validate that the OXM are in-place and correct. */ if (swofp_validate_flow_match(om, &error)) { etype = OFP_ERRTYPE_BAD_MATCH; goto ofp_error; } TAILQ_FOREACH(swft, &ofs->swofs_table_list, swft_table_next) { if ((ofm->fm_table_id != OFP_TABLE_ID_ALL) && (ofm->fm_table_id != swft->swft_table_id)) continue; swofp_flow_delete_on_table(sc, swft, om, ntohs(ofm->fm_priority), be64toh(ofm->fm_cookie), be64toh(ofm->fm_cookie_mask), ntohl(ofm->fm_out_port), ntohl(ofm->fm_out_group), strict); } m_freem(m); return (0); ofp_error: swofp_send_error(sc, m, etype, error); return (-1); } int swofp_flow_mod_cmd_delete(struct switch_softc *sc, struct mbuf *m) { return swofp_flow_mod_cmd_common_delete(sc, m, 0); } int swofp_flow_mod_cmd_delete_strict(struct switch_softc *sc, struct mbuf *m) { return swofp_flow_mod_cmd_common_delete(sc, m, 1); } ofp_msg_handler * swofp_flow_mod_lookup_handler(uint8_t cmd) { if (cmd > nitems(ofp_flow_mod_table)) return (NULL); else return (&ofp_flow_mod_table[cmd].ofm_cmd_handler); } int swofp_flow_mod(struct switch_softc *sc, struct mbuf *m) { struct ofp_flow_mod *ofm; ofp_msg_handler *handler; uint16_t ohlen; ofm = mtod(m, struct ofp_flow_mod *); ohlen = ntohs(ofm->fm_oh.oh_length); if (ohlen < sizeof(*ofm) || ohlen < (sizeof(*ofm) + ntohs(ofm->fm_match.om_length))) { swofp_send_error(sc, m, OFP_ERRTYPE_BAD_REQUEST, OFP_ERRREQ_BAD_LEN); return (-1); } handler = swofp_flow_mod_lookup_handler(ofm->fm_command); if (handler) { (*handler)(sc, m); } else { swofp_send_error(sc, m, OFP_ERRTYPE_FLOW_MOD_FAILED, OFP_ERRFLOWMOD_BAD_COMMAND); } return (0); } int swofp_group_mod_add(struct switch_softc *sc, struct mbuf *m) { struct swofp_ofs *ofs = sc->sc_ofs; struct ofp_group_mod *ogm; struct swofp_group_entry *swge; uint16_t error, etype; etype = OFP_ERRTYPE_GROUP_MOD_FAILED; ogm = mtod(m, struct ofp_group_mod *); if (ofs->swofs_group_table_num >= ofs->swofs_group_max_table) { error = OFP_ERRGROUPMOD_OUT_OF_GROUPS; goto failed; } if (ntohl(ogm->gm_group_id) > OFP_GROUP_ID_MAX) { error = OFP_ERRGROUPMOD_INVALID_GROUP; goto failed; } if ((swge = swofp_group_entry_lookup(sc, ntohl(ogm->gm_group_id)))) { error = OFP_ERRGROUPMOD_GROUP_EXISTS; goto failed; } if (ogm->gm_type != OFP_GROUP_T_ALL) { /* support ALL group only now*/ error = OFP_ERRGROUPMOD_BAD_TYPE; goto failed; } if (swofp_validate_buckets(sc, m, ogm->gm_type, &etype, &error)) goto failed; if ((swge = malloc(sizeof(*swge), M_DEVBUF, M_NOWAIT|M_ZERO)) == NULL) { error = OFP_ERRGROUPMOD_UNKNOWN_GROUP; goto failed; } swge->swge_group_id = ntohl(ogm->gm_group_id); swge->swge_type = ogm->gm_type; swge->swge_buckets_len = (ntohs(ogm->gm_oh.oh_length) - offsetof(struct ofp_group_mod, gm_buckets)); if (swge->swge_buckets_len > 0) { if ((swge->swge_buckets = malloc(swge->swge_buckets_len, M_DEVBUF, M_NOWAIT|M_ZERO)) == NULL) { free(swge, M_DEVBUF, sizeof(*swge)); error = OFP_ERRGROUPMOD_UNKNOWN_GROUP; goto failed; } m_copydata(m, offsetof(struct ofp_group_mod, gm_buckets), swge->swge_buckets_len, (caddr_t)swge->swge_buckets); } swofp_group_entry_add(sc, swge); m_freem(m); return (0); failed: swofp_send_error(sc, m, etype, error); return (0); } int swofp_group_mod_modify(struct switch_softc *sc, struct mbuf *m) { struct ofp_group_mod *ogm; struct swofp_group_entry *swge; uint16_t error, etype; uint32_t obucketlen; etype = OFP_ERRTYPE_GROUP_MOD_FAILED; ogm = mtod(m, struct ofp_group_mod *); if (ogm->gm_type != OFP_GROUP_T_ALL) { /* support ALL group only now */ error = OFP_ERRGROUPMOD_BAD_TYPE; goto failed; } if ((swge = swofp_group_entry_lookup(sc, ntohl(ogm->gm_group_id))) == NULL) { error = OFP_ERRGROUPMOD_UNKNOWN_GROUP; goto failed; } if (swofp_validate_buckets(sc, m, ogm->gm_type, &etype, &error)) goto failed; swge->swge_type = ogm->gm_type; obucketlen = swge->swge_buckets_len; swge->swge_buckets_len = (ntohs(ogm->gm_oh.oh_length) - offsetof(struct ofp_group_mod, gm_buckets)); if (obucketlen != swge->swge_buckets_len) { free(swge->swge_buckets, M_DEVBUF, obucketlen); swge->swge_buckets = NULL; if (swge->swge_buckets_len > 0 && (swge->swge_buckets = malloc(swge->swge_buckets_len, M_DEVBUF, M_NOWAIT|M_ZERO)) == NULL) { free(swge, M_DEVBUF, sizeof(*swge)); error = OFP_ERRGROUPMOD_UNKNOWN_GROUP; goto failed; } } if (swge->swge_buckets != NULL) m_copydata(m, offsetof(struct ofp_group_mod, gm_buckets), swge->swge_buckets_len, (caddr_t)swge->swge_buckets); m_freem(m); return (0); failed: swofp_send_error(sc, m, etype, error); return (0); } int swofp_group_mod_delete(struct switch_softc *sc, struct mbuf *m) { struct ofp_group_mod *ogm; struct swofp_group_entry *swge; int group_id; ogm = mtod(m, struct ofp_group_mod *); group_id = ntohl(ogm->gm_group_id); if (group_id == OFP_GROUP_ID_ALL) swofp_group_entry_delete_all(sc); else if ((swge = swofp_group_entry_lookup(sc, group_id)) != NULL) swofp_group_entry_delete(sc, swge); else { swofp_send_error(sc, m, OFP_ERRTYPE_GROUP_MOD_FAILED, OFP_ERRGROUPMOD_UNKNOWN_GROUP); return (0); } m_freem(m); return (0); } int swofp_group_mod(struct switch_softc *sc, struct mbuf *m) { struct ofp_group_mod *ogm; uint16_t cmd; ogm = mtod(m, struct ofp_group_mod *); if (ntohs(ogm->gm_oh.oh_length) < sizeof(*ogm)) { swofp_send_error(sc, m, OFP_ERRTYPE_BAD_REQUEST, OFP_ERRREQ_BAD_LEN); return (-1); } cmd = ntohs(ogm->gm_command); switch (cmd) { case OFP_GROUPCMD_ADD: return swofp_group_mod_add(sc, m); case OFP_GROUPCMD_MODIFY: return swofp_group_mod_modify(sc, m); case OFP_GROUPCMD_DELETE: return swofp_group_mod_delete(sc, m); default: swofp_send_error(sc, m, OFP_ERRTYPE_GROUP_MOD_FAILED, OFP_ERRGROUPMOD_BAD_COMMAND); break; } return (0); } /* * OpenFlow protocol PACKET OUT message handler */ int swofp_recv_packet_out(struct switch_softc *sc, struct mbuf *m) { struct ofp_packet_out *pout; struct ofp_action_header *ah; struct mbuf *mc = NULL, *mcn; int al_start, al_len, off; uint16_t ohlen, error; struct switch_flow_classify swfcl = {}; struct swofp_pipeline_desc swpld = { .swpld_swfcl = &swfcl }; pout = mtod(m, struct ofp_packet_out *); ohlen = ntohs(pout->pout_oh.oh_length); if (ohlen < sizeof(*pout) || ohlen < (sizeof(*pout) + ntohs(pout->pout_actions_len))) { swofp_send_error(sc, m, OFP_ERRTYPE_BAD_REQUEST, OFP_ERRREQ_BAD_LEN); return (-1); } al_len = ntohs(pout->pout_actions_len); al_start = offsetof(struct ofp_packet_out, pout_actions); /* Validate actions before anything else. */ ah = (struct ofp_action_header *) ((uint8_t *)pout + sizeof(*pout)); if (swofp_validate_action(sc, ah, al_len, &error)) { swofp_send_error(sc, m, OFP_ERRTYPE_BAD_ACTION, error); return (EINVAL); } if (pout->pout_buffer_id == OFP_PKTOUT_NO_BUFFER) { /* * It's not necessary to deep copy at here because it's done * in m_dup_pkt(). */ if ((mc = m_split(m, (al_start + al_len), M_NOWAIT)) == NULL) { m_freem(m); return (ENOBUFS); } mcn = m_dup_pkt(mc, ETHER_ALIGN, M_NOWAIT); m_freem(mc); if (mcn == NULL) { m_freem(m); return (ENOBUFS); } mc = mcn; } else { /* TODO We don't do buffering yet. */ swofp_send_error(sc, m, OFP_ERRTYPE_BAD_REQUEST, OFP_ERRREQ_BUFFER_UNKNOWN); return (0); } mc = switch_flow_classifier(mc, pout->pout_in_port, &swfcl); if (mc == NULL) { m_freem(m); return (0); } TAILQ_INIT(&swpld.swpld_fwdp_q); swfcl.swfcl_in_port = ntohl(pout->pout_in_port); for (off = al_start; off < al_start + al_len; off += ntohs(ah->ah_len)) { ah = (struct ofp_action_header *)(mtod(m, caddr_t) + off); mc = swofp_execute_action(sc, mc, &swpld, ah); if (mc == NULL) break; } if (mc) switch_port_egress(sc, &swpld.swpld_fwdp_q, mc); m_freem(m); return (0); } /* * OpenFlow protocol MULTIPART message: * * Multipart messages are used to carry a large amount of data because a single * OpenFlow message is limited to 64KB. If a message is over 64KB, it is * splited some OpenFlow messages. OpenFlow Switch Specification says that * "NO OBJECT CAN BE SPLIT ACROSS TWO MESSAGES". In other words, point of * splittig is different per reply, so switch(4) builds multipart message using * swofp_mpms_* functions which splits messsages not to object across * two messages. */ int swofp_mpmsg_reply_create(struct ofp_multipart *req, struct swofp_mpmsg *swmp) { struct mbuf *hdr, *body; struct ofp_multipart *omp; memset(swmp, 0, sizeof(*swmp)); ml_init(&swmp->swmp_body); MGETHDR(hdr, M_DONTWAIT, MT_DATA); if (hdr == NULL) goto error; memset(mtod(hdr, caddr_t), 0, sizeof(*omp)); omp = mtod(hdr, struct ofp_multipart *); omp->mp_oh.oh_version = req->mp_oh.oh_version; omp->mp_oh.oh_xid = req->mp_oh.oh_xid; omp->mp_oh.oh_type = OFP_T_MULTIPART_REPLY; omp->mp_type = req->mp_type; hdr->m_len = hdr->m_pkthdr.len = sizeof(*omp); swmp->swmp_hdr = hdr; MGETHDR(body, M_DONTWAIT, MT_DATA); if (body != NULL) MCLGET(body, M_DONTWAIT); if (body == NULL) goto error; body->m_len = body->m_pkthdr.len = 0; ml_enqueue(&swmp->swmp_body, body); return (0); error: m_freem(hdr); swmp->swmp_hdr = NULL; return (ENOBUFS); } /* * Copy data from a buffer back into the indicated swmp's body buffer */ int swofp_mpmsg_put(struct swofp_mpmsg *swmp, caddr_t data, size_t len) { struct mbuf *m, *n; int error; KASSERT(swmp->swmp_hdr != NULL); m = swmp->swmp_body.ml_tail; if (m == NULL) return (ENOBUFS); if (m->m_pkthdr.len + len > SWOFP_MPMSG_MAX) { MGETHDR(n, M_DONTWAIT, MT_DATA); if (n != NULL) MCLGET(n, M_DONTWAIT); if (n == NULL) return (ENOBUFS); n->m_len = n->m_pkthdr.len = 0; ml_enqueue(&swmp->swmp_body, n); m = n; } if ((error = m_copyback(m, m->m_pkthdr.len, len, data, M_NOWAIT))) return (error); return (0); } /* * Copy data from a mbuf back into the indicated swmp's body buffer */ int swofp_mpmsg_m_put(struct swofp_mpmsg *swmp, struct mbuf *msg) { struct mbuf *m, *n; int len; KASSERT(swmp->swmp_hdr != NULL); m = swmp->swmp_body.ml_tail; if (m == NULL) return (ENOBUFS); if (m->m_pkthdr.len + msg->m_pkthdr.len > SWOFP_MPMSG_MAX) { MGETHDR(n, M_DONTWAIT, MT_DATA); if (n != NULL) MCLGET(n, M_DONTWAIT); if (n == NULL) return (ENOBUFS); n->m_len = n->m_pkthdr.len = 0; ml_enqueue(&swmp->swmp_body, n); m = n; } len = m->m_pkthdr.len + msg->m_pkthdr.len; m_cat(m, msg); m->m_pkthdr.len = len; return (0); } void swofp_mpmsg_destroy(struct swofp_mpmsg *swmp) { m_freem(swmp->swmp_hdr); ml_purge(&swmp->swmp_body); } int swofp_multipart_req(struct switch_softc *sc, struct mbuf *m) { struct ofp_multipart *omp; ofp_msg_handler handler; omp = mtod(m, struct ofp_multipart *); if (ntohs(omp->mp_oh.oh_length) < sizeof(*omp)) { swofp_send_error(sc, m, OFP_ERRTYPE_BAD_REQUEST, OFP_ERRREQ_BAD_LEN); return (-1); } if (omp->mp_flags & OFP_T_MULTIPART_REQUEST) { /* multipart message re-assembly iss not supported yet */ m_freem(m); return (ENOBUFS); } handler = swofp_lookup_mpmsg_handler(ntohs(omp->mp_type)); if (handler) (*handler)(sc, m); else swofp_send_error(sc, m, OFP_ERRTYPE_BAD_REQUEST, OFP_ERRREQ_MULTIPART); return (0); } int swofp_multipart_reply(struct switch_softc *sc, struct swofp_mpmsg *swmp) { struct ofp_multipart *omp; struct mbuf *hdr, *body; int len, error = 0; KASSERT(swmp->swmp_hdr != NULL); omp = mtod(swmp->swmp_hdr, struct ofp_multipart *); while ((body = ml_dequeue(&swmp->swmp_body)) != NULL) { omp->mp_oh.oh_length = htons(sizeof(*omp) + body->m_pkthdr.len); if (swmp->swmp_body.ml_tail != NULL) { omp->mp_flags |= htons(OFP_MP_FLAG_REPLY_MORE); if ((hdr = m_dup_pkt(swmp->swmp_hdr, 0, M_WAITOK)) == NULL) { error = ENOBUFS; goto error; } } else { omp->mp_flags &= ~htons(OFP_MP_FLAG_REPLY_MORE); hdr = swmp->swmp_hdr; } if (body->m_pkthdr.len) { len = hdr->m_pkthdr.len + body->m_pkthdr.len; m_cat(hdr, body); hdr->m_pkthdr.len = len; } else m_freem(body); (void)swofp_output(sc, hdr); } return (0); error: swofp_mpmsg_destroy(swmp); return (error); } int swofp_put_flow(struct mbuf *m, struct swofp_flow_table *swft, struct swofp_flow_entry *swfe) { struct ofp_flow_stats *pofs, ofs; struct timespec now, duration; const uint8_t pad_data[OFP_ALIGNMENT] = {}; struct mbuf *n; int start, off, error, offp, pad = 0; int omlen; memset(&ofs, 0, sizeof(ofs)); ofs.fs_table_id = swft->swft_table_id; nanouptime(&now); timespecsub(&now, &swfe->swfe_installed_time, &duration); ofs.fs_duration_sec = ntohl((int)duration.tv_sec); ofs.fs_priority = htons(swfe->swfe_priority); ofs.fs_idle_timeout = htons(swfe->swfe_idle_timeout); ofs.fs_hard_timeout = htons(swfe->swfe_hard_timeout); ofs.fs_cookie = htobe64(swfe->swfe_cookie); ofs.fs_byte_count = htobe64(swfe->swfe_byte_cnt); ofs.fs_packet_count = htobe64(swfe->swfe_packet_cnt); /* * struct ofp_flow_statsu has some fields which is variable length , * so the length is determined by all fields puts. */ start = off = m->m_pkthdr.len; /* * Put ofp_flow_stat exclusive ofp_match because ofp_match is put * with ofp_matches */ if ((error = m_copyback(m, off, (sizeof(ofs) - sizeof(struct ofp_match)), &ofs, M_NOWAIT))) goto failed; off += (sizeof(ofs) - sizeof(struct ofp_match)); /* * Put ofp_match include ofp_ox_matches and pad */ omlen = ntohs(swfe->swfe_match->om_length); pad = OFP_ALIGN(omlen) - omlen; if ((error = m_copyback(m, off, omlen, swfe->swfe_match, M_NOWAIT))) goto failed; off += omlen; if ((error = m_copyback(m, off, pad, pad_data, M_NOWAIT))) goto failed; off += pad; /* * Put instructions */ if (swfe->swfe_goto_table) { if ((error = m_copyback(m, off, ntohs(swfe->swfe_goto_table->igt_len), swfe->swfe_goto_table, M_NOWAIT))) goto failed; off += ntohs(swfe->swfe_goto_table->igt_len); } if (swfe->swfe_write_metadata) { if ((error = m_copyback(m, off, ntohs(swfe->swfe_write_metadata->iwm_len), swfe->swfe_write_metadata, M_NOWAIT))) goto failed; off += ntohs(swfe->swfe_write_metadata->iwm_len); } if (swfe->swfe_apply_actions) { if ((error = m_copyback(m, off, ntohs(swfe->swfe_apply_actions->ia_len), swfe->swfe_apply_actions, M_NOWAIT))) goto failed; off += ntohs(swfe->swfe_apply_actions->ia_len); } if (swfe->swfe_write_actions) { if ((error = m_copyback(m, off, ntohs(swfe->swfe_write_actions->ia_len), swfe->swfe_write_actions, M_NOWAIT))) goto failed; off += ntohs(swfe->swfe_write_actions->ia_len); } if (swfe->swfe_clear_actions) { if ((error = m_copyback(m, off, ntohs(swfe->swfe_clear_actions->ia_len), swfe->swfe_clear_actions, M_NOWAIT))) goto failed; off += ntohs(swfe->swfe_clear_actions->ia_len); } /* * Set ofp_flow_stat length */ if ((n = m_pulldown(m, start, sizeof(*pofs), &offp)) == NULL) return (ENOBUFS); pofs = (struct ofp_flow_stats *)(mtod(n, caddr_t) + offp); pofs->fs_length = htons(off - start); return (0); failed: m_freem(m); return (error); } int swofp_mp_recv_desc(struct switch_softc *sc, struct mbuf *m) { struct ofp_desc od; struct swofp_mpmsg swmp; int error; if ((error = swofp_mpmsg_reply_create( mtod(m, struct ofp_multipart *), &swmp))) goto failed; memset(&od, 0, sizeof(od)); strlcpy(od.d_mfr_desc, "openbsd.org", OFP_DESC_STR_LEN); strlcpy(od.d_hw_desc, "openbsd", OFP_DESC_STR_LEN); strlcpy(od.d_sw_desc, "openbsd", OFP_DESC_STR_LEN); strlcpy(od.d_serial_num, "0", OFP_SERIAL_NUM_LEN); strlcpy(od.d_dp_desc, sc->sc_if.if_xname, OFP_DESC_STR_LEN); if ((error = swofp_mpmsg_put(&swmp, (caddr_t)&od, sizeof(od)))) goto failed; m_freem(m); return swofp_multipart_reply(sc, &swmp); failed: m_freem(m); swofp_mpmsg_destroy(&swmp); return (error); } int swofp_put_flows_from_table(struct swofp_mpmsg *swmp, struct swofp_flow_table *swft, struct ofp_flow_stats_request *ofsr) { struct swofp_flow_entry *swfe; struct mbuf *m; int error = 0; LIST_FOREACH(swfe, &swft->swft_flow_list, swfe_next) { if (!swofp_flow_cmp_non_strict(swfe, &ofsr->fsr_match)) continue; if (!swofp_flow_filter(swfe, be64toh(ofsr->fsr_cookie), be64toh(ofsr->fsr_cookie_mask), ntohl(ofsr->fsr_out_port), ntohl(ofsr->fsr_out_group))) continue; MGETHDR(m, M_DONTWAIT, MT_DATA); if (m == NULL) return (ENOBUFS); m->m_len = m->m_pkthdr.len = 0; if ((error = swofp_put_flow(m, swft, swfe))) break; if ((error = swofp_mpmsg_m_put(swmp, m))) { /* swofp_mpmsg_m_put() doesn't free m on error */ m_freem(m); break; } } return (error); } int swofp_mp_recv_flow(struct switch_softc *sc, struct mbuf *m) { struct swofp_ofs *ofs = sc->sc_ofs; struct ofp_flow_stats_request *ofsr; struct swofp_flow_table *swft; struct swofp_mpmsg swmp; int error; if ((error = swofp_mpmsg_reply_create( mtod(m, struct ofp_multipart *), &swmp))) goto failed; ofsr = (struct ofp_flow_stats_request *) (mtod(m, caddr_t) + sizeof(struct ofp_multipart)); TAILQ_FOREACH(swft, &ofs->swofs_table_list, swft_table_next) { if ((ofsr->fsr_table_id != OFP_TABLE_ID_ALL) && (ofsr->fsr_table_id != swft->swft_table_id)) continue; if ((error = swofp_put_flows_from_table(&swmp, swft, ofsr))) goto failed; } m_freem(m); return swofp_multipart_reply(sc, &swmp); failed: m_freem(m); swofp_mpmsg_destroy(&swmp); return (error); } void swofp_aggregate_stat_from_table(struct ofp_aggregate_stats *aggstat, struct swofp_flow_table *swft, struct ofp_aggregate_stats_request *oasr) { struct swofp_flow_entry *swfe; uint64_t packet_cnt = 0, byte_cnt = 0; uint32_t flow_cnt = 0; LIST_FOREACH(swfe, &swft->swft_flow_list, swfe_next) { if (!swofp_flow_cmp_non_strict(swfe, &oasr->asr_match)) continue; if (!swofp_flow_filter(swfe, be64toh(oasr->asr_cookie), be64toh(oasr->asr_cookie_mask), ntohl(oasr->asr_out_port), ntohl(oasr->asr_out_group))) continue; packet_cnt += swfe->swfe_packet_cnt; byte_cnt += swfe->swfe_byte_cnt; flow_cnt++; } aggstat->as_packet_count = htobe64(packet_cnt); aggstat->as_byte_count = htobe64(byte_cnt); aggstat->as_flow_count = htonl(flow_cnt++); } int swofp_mp_recv_aggregate_flow_stat(struct switch_softc *sc, struct mbuf *m) { struct swofp_ofs *ofs = sc->sc_ofs; struct ofp_aggregate_stats_request *oasr; struct swofp_flow_table *swft; struct swofp_mpmsg swmp; struct ofp_aggregate_stats aggstat; int error; if ((error = swofp_mpmsg_reply_create( mtod(m, struct ofp_multipart *), &swmp))) goto failed; memset(&aggstat, 0, sizeof(aggstat)); oasr = (struct ofp_aggregate_stats_request *) (mtod(m, caddr_t) + sizeof(struct ofp_multipart)); TAILQ_FOREACH(swft, &ofs->swofs_table_list, swft_table_next) { if ((oasr->asr_table_id != OFP_TABLE_ID_ALL) && (oasr->asr_table_id != swft->swft_table_id)) continue; swofp_aggregate_stat_from_table(&aggstat, swft, oasr); } if ((error = swofp_mpmsg_put(&swmp, (caddr_t)&aggstat, sizeof(aggstat)))) goto failed; m_freem(m); return swofp_multipart_reply(sc, &swmp); failed: m_freem(m); swofp_mpmsg_destroy(&swmp); return (error); } int swofp_mp_recv_table_stats(struct switch_softc *sc, struct mbuf *m) { struct swofp_ofs *ofs = sc->sc_ofs; struct ofp_table_stats tblstat; struct swofp_flow_table *swft; struct swofp_mpmsg swmp; int error; if ((error = swofp_mpmsg_reply_create( mtod(m, struct ofp_multipart *), &swmp))) goto failed; TAILQ_FOREACH(swft, &ofs->swofs_table_list, swft_table_next) { memset(&tblstat, 0, sizeof(tblstat)); tblstat.ts_table_id = swft->swft_table_id; tblstat.ts_active_count = htonl((uint32_t)swft->swft_flow_num); tblstat.ts_lookup_count = htobe64(swft->swft_lookup_count); tblstat.ts_matched_count = htobe64(swft->swft_matched_count); if ((error = swofp_mpmsg_put(&swmp, (caddr_t)&tblstat, sizeof(tblstat)))) goto failed; } m_freem(m); return swofp_multipart_reply(sc, &swmp); failed: m_freem(m); swofp_mpmsg_destroy(&swmp); return (error); } int swofp_mp_recv_port_stats(struct switch_softc *sc, struct mbuf *m) { struct switch_port *swpo; struct swofp_mpmsg swmp; struct ifnet *ifs; struct ofp_port_stats postat; int error; struct timespec now, duration; if ((error = swofp_mpmsg_reply_create( mtod(m, struct ofp_multipart *), &swmp))) goto failed; nanouptime(&now); TAILQ_FOREACH(swpo, &sc->sc_swpo_list, swpo_list_next) { memset(&postat, 0, sizeof(postat)); ifs = if_get(swpo->swpo_ifindex); if (ifs == NULL) continue; if (swpo->swpo_flags & IFBIF_LOCAL) postat.pt_port_no = htonl(OFP_PORT_LOCAL); else postat.pt_port_no = htonl(swpo->swpo_port_no); postat.pt_rx_packets = htobe64(ifs->if_ipackets); postat.pt_tx_packets = htobe64(ifs->if_opackets); postat.pt_rx_bytes = htobe64(ifs->if_obytes); postat.pt_tx_bytes = htobe64(ifs->if_ibytes); postat.pt_rx_dropped = htobe64(ifs->if_iqdrops); postat.pt_tx_dropped = htobe64(ifs->if_oqdrops); postat.pt_rx_errors = htobe64(ifs->if_ierrors); postat.pt_tx_errors = htobe64(ifs->if_oerrors); postat.pt_rx_frame_err = htobe64(0); postat.pt_rx_over_err = htobe64(0); postat.pt_rx_crc_err = htobe64(0); postat.pt_collision = htobe64(ifs->if_collisions); timespecsub(&now, &swpo->swpo_appended, &duration); postat.pt_duration_sec = htonl((uint32_t)duration.tv_sec); postat.pt_duration_nsec = htonl(duration.tv_nsec); if_put(ifs); if ((error = swofp_mpmsg_put(&swmp, (caddr_t)&postat, sizeof(postat)))) goto failed; } m_freem(m); return swofp_multipart_reply(sc, &swmp); failed: m_freem(m); swofp_mpmsg_destroy(&swmp); return (error); } int swofp_table_features_put_oxm(struct mbuf *m, int *off, uint16_t tp_type) { struct ofp_table_feature_property tp; struct ofp_ox_match oxm; uint32_t padding = 0; int i, supported = 0; for (i = 0 ; i < nitems(ofp_oxm_handlers); i++) { switch (tp_type) { case OFP_TABLE_FEATPROP_MATCH: if (ofp_oxm_handlers[i].oxm_match == NULL) continue; break; case OFP_TABLE_FEATPROP_WILDCARDS: if (ofp_oxm_handlers[i].oxm_match == NULL || !(ofp_oxm_handlers[i].oxm_flags & SWOFP_MATCH_WILDCARD)) continue; break; case OFP_TABLE_FEATPROP_APPLY_SETFIELD: case OFP_TABLE_FEATPROP_APPLY_SETFIELD_MISS: case OFP_TABLE_FEATPROP_WRITE_SETFIELD: case OFP_TABLE_FEATPROP_WRITE_SETFIELD_MISS: if (ofp_oxm_handlers[i].oxm_set == NULL) continue; break; } supported++; } tp.tp_type = htons(tp_type); tp.tp_length = htons((sizeof(oxm) * supported) + sizeof(tp)); if (m_copyback(m, *off, sizeof(tp), (caddr_t)&tp, M_NOWAIT)) return (OFP_ERRREQ_MULTIPART_OVERFLOW); *off += sizeof(tp); for (i = 0 ; i < nitems(ofp_oxm_handlers); i++) { switch (tp_type) { case OFP_TABLE_FEATPROP_MATCH: if (ofp_oxm_handlers[i].oxm_match == NULL) continue; break; case OFP_TABLE_FEATPROP_WILDCARDS: if (ofp_oxm_handlers[i].oxm_match == NULL || !(ofp_oxm_handlers[i].oxm_flags & SWOFP_MATCH_WILDCARD)) continue; break; case OFP_TABLE_FEATPROP_APPLY_SETFIELD: case OFP_TABLE_FEATPROP_APPLY_SETFIELD_MISS: case OFP_TABLE_FEATPROP_WRITE_SETFIELD: case OFP_TABLE_FEATPROP_WRITE_SETFIELD_MISS: if (ofp_oxm_handlers[i].oxm_set == NULL) continue; break; } memset(&oxm, 0, sizeof(oxm)); OFP_OXM_SET_FIELD(&oxm, ofp_oxm_handlers[i].oxm_field); if ((tp_type == OFP_TABLE_FEATPROP_MATCH) && (ofp_oxm_handlers[i].oxm_flags & SWOFP_MATCH_MASK)) OFP_OXM_SET_HASMASK(&oxm); oxm.oxm_class = htons(OFP_OXM_C_OPENFLOW_BASIC); oxm.oxm_length = ofp_oxm_handlers[i].oxm_len; if (m_copyback(m, *off, sizeof(oxm), (caddr_t)&oxm, M_NOWAIT)) return (OFP_ERRREQ_MULTIPART_OVERFLOW); *off += sizeof(oxm); } /* * It's always 4 byte for padding becouse struct ofp_ox_mach and * struct ofp_table_feature_property are 4 byte. */ if ((supported & 0x1) == 0) { if (m_copyback(m, *off, sizeof(padding), (caddr_t)&padding, M_NOWAIT)) return (OFP_ERRREQ_MULTIPART_OVERFLOW); *off += sizeof(padding); } return (0); } int swofp_table_features_put_actions(struct mbuf *m, int *off, uint16_t tp_type) { struct ofp_table_feature_property tp; struct ofp_action_header action; int i, supported = 0; int actionlen, padsize; uint8_t padding[8]; for (i = 0 ; i < nitems(ofp_action_handlers); i++) { if (ofp_action_handlers[i].action) supported++; } actionlen = sizeof(action) - sizeof(action.ah_pad); tp.tp_type = htons(tp_type); tp.tp_length = (actionlen * supported) + sizeof(tp); padsize = OFP_ALIGN(tp.tp_length) - tp.tp_length; tp.tp_length = htons(tp.tp_length); if (m_copyback(m, *off, sizeof(tp), (caddr_t)&tp, M_NOWAIT)) return (OFP_ERRREQ_MULTIPART_OVERFLOW); *off += sizeof(tp); for (i = 0 ; i < nitems(ofp_action_handlers); i++) { if (ofp_action_handlers[i].action == NULL) continue; memset(&action, 0, actionlen); action.ah_type = ntohs(ofp_action_handlers[i].action_type); /* XXX action length is different for experimenter type. */ action.ah_len = ntohs(actionlen); if (m_copyback(m, *off, actionlen, (caddr_t)&action, M_NOWAIT)) return (OFP_ERRREQ_MULTIPART_OVERFLOW); *off += actionlen; } if (padsize) { memset(padding, 0, padsize); if (m_copyback(m, *off, padsize, &padding, M_NOWAIT)) return (OFP_ERRREQ_MULTIPART_OVERFLOW); *off += padsize; } return (0); } int swofp_table_features_put_instruction(struct mbuf *m, int *off, uint16_t tp_type) { struct ofp_table_feature_property tp; struct ofp_instruction instructions[] = { { htons(OFP_INSTRUCTION_T_GOTO_TABLE), htons(sizeof(struct ofp_instruction)) }, { htons(OFP_INSTRUCTION_T_WRITE_META), htons(sizeof(struct ofp_instruction)) }, { htons(OFP_INSTRUCTION_T_WRITE_ACTIONS), htons(sizeof(struct ofp_instruction)) }, { htons(OFP_INSTRUCTION_T_APPLY_ACTIONS), htons(sizeof(struct ofp_instruction)) }, { htons(OFP_INSTRUCTION_T_CLEAR_ACTIONS), htons(sizeof(struct ofp_instruction)) }, }; tp.tp_type = htons(tp_type); tp.tp_length = htons(sizeof(instructions) + sizeof(tp)); if (m_copyback(m, *off, sizeof(tp), (caddr_t)&tp, M_NOWAIT)) return (OFP_ERRREQ_MULTIPART_OVERFLOW); *off += sizeof(tp); if (m_copyback(m, *off, sizeof(instructions), (caddr_t)instructions, M_NOWAIT)) return (OFP_ERRREQ_MULTIPART_OVERFLOW); *off += sizeof(instructions); return (0); } int swofp_mp_recv_table_features(struct switch_softc *sc, struct mbuf *m) { struct swofp_ofs *ofs = sc->sc_ofs; struct swofp_flow_table *swft; struct ofp_table_features *tblf; struct mbuf *n; int off, error; struct swofp_mpmsg swmp; if ((error = swofp_mpmsg_reply_create( mtod(m, struct ofp_multipart *), &swmp))) goto error; TAILQ_FOREACH(swft, &ofs->swofs_table_list, swft_table_next) { /* using mbuf becouse table featrues struct is variable length*/ MGETHDR(n, M_DONTWAIT, MT_DATA); if (n != NULL) MCLGET(n, M_DONTWAIT); if (n == NULL) goto error; n->m_len = n->m_pkthdr.len = sizeof(*tblf); tblf = mtod(n, struct ofp_table_features *); memset(tblf, 0, sizeof(*tblf)); tblf->tf_tableid = swft->swft_table_id; tblf->tf_metadata_match = UINT64_MAX; tblf->tf_metadata_write = UINT64_MAX; tblf->tf_config = 0; tblf->tf_max_entries = htonl(ofs->swofs_flow_max_entry); off = sizeof(*tblf); if ((error = swofp_table_features_put_instruction(n, &off, OFP_TABLE_FEATPROP_INSTRUCTION))) goto error; if ((error = swofp_table_features_put_instruction(n, &off, OFP_TABLE_FEATPROP_INSTRUCTION_MISS))) goto error; if ((error = swofp_table_features_put_actions(n, &off, OFP_TABLE_FEATPROP_APPLY_ACTIONS))) goto error; if ((error = swofp_table_features_put_actions(n, &off, OFP_TABLE_FEATPROP_APPLY_ACTIONS_MISS))) goto error; if ((error = swofp_table_features_put_actions(n, &off, OFP_TABLE_FEATPROP_WRITE_ACTIONS))) goto error; if ((error = swofp_table_features_put_actions(n, &off, OFP_TABLE_FEATPROP_WRITE_ACTIONS_MISS))) goto error; if ((error = swofp_table_features_put_oxm(n, &off, OFP_TABLE_FEATPROP_MATCH))) goto error; if ((error = swofp_table_features_put_oxm(n, &off, OFP_TABLE_FEATPROP_WILDCARDS))) goto error; if ((error = swofp_table_features_put_oxm(n, &off, OFP_TABLE_FEATPROP_WRITE_SETFIELD))) goto error; if ((error = swofp_table_features_put_oxm(n, &off, OFP_TABLE_FEATPROP_WRITE_SETFIELD_MISS))) goto error; if ((error = swofp_table_features_put_oxm(n, &off, OFP_TABLE_FEATPROP_APPLY_SETFIELD))) goto error; if ((error = swofp_table_features_put_oxm(n, &off, OFP_TABLE_FEATPROP_APPLY_SETFIELD_MISS))) goto error; tblf->tf_length = htons(n->m_pkthdr.len); if ((error = swofp_mpmsg_m_put(&swmp, n))) { m_freem(n); goto error; } } m_freem(m); return swofp_multipart_reply(sc, &swmp); error: m_freem(m); swofp_mpmsg_destroy(&swmp); return (error); } int swofp_mp_recv_port_desc(struct switch_softc *sc, struct mbuf *m) { struct ofp_switch_port swp; struct switch_port *swpo; struct swofp_mpmsg swmp; struct ifnet *ifs; int error; if ((error = swofp_mpmsg_reply_create( mtod(m, struct ofp_multipart *), &swmp))) { m_freem(m); return (error); } TAILQ_FOREACH(swpo, &sc->sc_swpo_list, swpo_list_next) { memset(&swp, 0, sizeof(swp)); ifs = if_get(swpo->swpo_ifindex); if (ifs == NULL) continue; if (swpo->swpo_flags & IFBIF_LOCAL) swp.swp_number = htonl(OFP_PORT_LOCAL); else swp.swp_number = htonl(swpo->swpo_port_no); memcpy(swp.swp_macaddr, ((struct arpcom *)ifs)->ac_enaddr, ETHER_ADDR_LEN); strlcpy(swp.swp_name, ifs->if_xname, sizeof(swp.swp_name)); if (!ISSET(ifs->if_flags, IFF_UP)) swp.swp_config |= OFP_PORTCONFIG_PORT_DOWN; if (!ISSET(swpo->swpo_flags, IFBIF_STP)) swp.swp_config |= OFP_PORTCONFIG_NO_STP; swp.swp_config = htonl(swp.swp_config); if (!LINK_STATE_IS_UP(ifs->if_data.ifi_link_state)) swp.swp_state |= OFP_PORTSTATE_LINK_DOWN; if_put(ifs); swp.swp_state = htonl(swp.swp_state); /* XXX how to get the if_media from ifp? ioctl? */ swp.swp_cur = htonl(swp.swp_cur); swp.swp_advertised = htonl(swp.swp_advertised); swp.swp_supported = htonl(swp.swp_supported); swp.swp_peer = htonl(swp.swp_peer); if ((error = swofp_mpmsg_put(&swmp, (caddr_t)&swp, sizeof(swp)))) goto error; } m_freem(m); return swofp_multipart_reply(sc, &swmp); error: m_freem(m); swofp_mpmsg_destroy(&swmp); return (error); } int swofp_mp_recv_group_desc(struct switch_softc *sc, struct mbuf *m) { struct ofp_group_desc ogd; struct swofp_group_entry *swge; struct swofp_mpmsg swmp; int error; if ((error = swofp_mpmsg_reply_create( mtod(m, struct ofp_multipart *), &swmp))) goto failed; LIST_FOREACH(swge, &sc->sc_ofs->swofs_group_table, swge_next) { memset(&ogd, 0, sizeof(ogd)); ogd.gd_length = htons(offsetof(struct ofp_group_desc, gd_buckets) + swge->swge_buckets_len); ogd.gd_group_id = htonl(swge->swge_group_id); ogd.gd_type = swge->swge_type; /* * Copy back GROUP DESC without buckets */ if ((error = swofp_mpmsg_put(&swmp, (caddr_t)&ogd, sizeof(ogd)))) goto failed; /* * Copy back buckets on GROUP DESC */ if (swge->swge_buckets != NULL && (error = swofp_mpmsg_put(&swmp, (caddr_t)swge->swge_buckets, swge->swge_buckets_len))) goto failed; } m_freem(m); return swofp_multipart_reply(sc, &swmp); failed: m_freem(m); swofp_mpmsg_destroy(&swmp); return (error); } int swofp_barrier_req(struct switch_softc *sc, struct mbuf *m) { swofp_barrier_reply(sc, m); return 0; } void swofp_barrier_reply(struct switch_softc *sc, struct mbuf *m) { struct ofp_header *oh; oh = mtod(m, struct ofp_header *); oh->oh_type = OFP_T_BARRIER_REPLY; (void)swofp_output(sc, m); }