/* $OpenBSD: relayd.h,v 1.268 2021/07/25 20:31:41 benno Exp $ */ /* * Copyright (c) 2006 - 2016 Reyk Floeter * Copyright (c) 2006, 2007 Pierre-Yves Ritschard * Copyright (c) 2003, 2004 Henning Brauer * * 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. */ #ifndef RELAYD_H #define RELAYD_H #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifndef nitems #define nitems(_a) (sizeof((_a)) / sizeof((_a)[0])) #endif #define CONF_FILE "/etc/relayd.conf" #define RELAYD_SOCKET "/var/run/relayd.sock" #define PF_SOCKET "/dev/pf" #define RELAYD_USER "_relayd" #define RELAYD_ANCHOR "relayd" #define RELAYD_SERVERNAME "OpenBSD relayd" #define CHECK_TIMEOUT 200 #define CHECK_INTERVAL 10 #define EMPTY_TABLE UINT_MAX #define EMPTY_ID UINT_MAX #define LABEL_NAME_SIZE 1024 #define TAG_NAME_SIZE 64 #define TABLE_NAME_SIZE 64 #define RD_TAG_NAME_SIZE 64 #define RT_LABEL_SIZE 32 #define SRV_NAME_SIZE 64 #define MAX_NAME_SIZE 64 #define SRV_MAX_VIRTS 16 #define TLS_NAME_SIZE 512 #define TLS_CERT_HASH_SIZE 128 #define RELAY_MAX_PREFETCH 256 #define RELAY_MIN_PREFETCHED 32 #define FD_RESERVE 5 #define RELAY_MAX_BACKLOG 512 #define RELAY_TIMEOUT 600 #define RELAY_CACHESIZE -1 /* use default size */ #define RELAY_NUMPROC 3 #define RELAY_MAXHOSTS 32 #define RELAY_MAXHEADERLENGTH 131072 #define RELAY_DEFHEADERLENGTH 8192 #define RELAY_STATINTERVAL 60 #define RELAY_BACKLOG 10 #define RELAY_MAXLOOKUPLEVELS 5 #define RELAY_OUTOF_FD_RETRIES 5 #define RELAY_MAX_HASH_RETRIES 5 #define RELAY_TLS_PRIV_TIMEOUT 1000 /* wait 1sec for the ca */ #define CONFIG_RELOAD 0x00 #define CONFIG_TABLES 0x01 #define CONFIG_RDRS 0x02 #define CONFIG_RELAYS 0x04 #define CONFIG_PROTOS 0x08 #define CONFIG_ROUTES 0x10 #define CONFIG_RTS 0x20 #define CONFIG_CA_ENGINE 0x40 #define CONFIG_CERTS 0x80 #define CONFIG_ALL 0xff #define SMALL_READ_BUF_SIZE 1024 #define ICMP_BUF_SIZE 64 #define ICMP_RCVBUF_SIZE 262144 #define AGENTX_RECONNECT_TIMEOUT { 3, 0 } /* sec, usec */ #define PROC_PARENT_SOCK_FILENO 3 #define PROC_MAX_INSTANCES 32 #if DEBUG > 1 #define DPRINTF log_debug #define DEBUG_CERT 1 #else #define DPRINTF(x...) do {} while(0) #endif /* Used for DNS request ID randomization */ struct shuffle { u_int16_t id_shuffle[65536]; int isindex; }; typedef u_int32_t objid_t; struct ctl_status { objid_t id; int up; int retry_cnt; u_long check_cnt; u_int16_t he; }; struct ctl_id { objid_t id; char name[MAX_NAME_SIZE]; }; struct ctl_relaytable { objid_t id; objid_t relayid; int mode; u_int32_t flags; }; enum fd_type { RELAY_FD_CERT = 1, RELAY_FD_CACERT = 2, RELAY_FD_CAFILE = 3, RELAY_FD_KEY = 4, RELAY_FD_OCSP = 5 }; struct ctl_relayfd { objid_t id; objid_t relayid; enum fd_type type; }; struct ctl_script { objid_t host; int retval; struct timeval timeout; char name[HOST_NAME_MAX+1]; char path[PATH_MAX]; }; struct ctl_demote { char group[IFNAMSIZ]; int level; }; struct ctl_icmp_event { struct relayd *env; int s; int af; int last_up; struct event ev; struct timeval tv_start; }; struct ctl_tcp_event { int s; char *req; struct ibuf *buf; struct host *host; struct table *table; struct timeval tv_start; struct event ev; int (*validate_read)(struct ctl_tcp_event *); int (*validate_close)(struct ctl_tcp_event *); struct tls *tls; }; enum direction { RELAY_DIR_INVALID = -1, RELAY_DIR_ANY = 0, RELAY_DIR_REQUEST = 1, RELAY_DIR_RESPONSE = 2 }; enum relay_state { STATE_INIT, STATE_PENDING, STATE_PRECONNECT, STATE_CONNECTED, STATE_CLOSED, STATE_DONE }; struct ctl_relay_event { int s; in_port_t port; struct sockaddr_storage ss; struct bufferevent *bev; struct evbuffer *output; struct ctl_relay_event *dst; struct rsession *con; struct tls *tls; struct tls_config *tls_cfg; struct tls *tls_ctx; uint8_t *tlscert; size_t tlscert_len; off_t splicelen; off_t toread; size_t headerlen; int line; int done; int timedout; enum relay_state state; enum direction dir; /* protocol-specific descriptor */ void *desc; }; enum httpchunk { TOREAD_UNLIMITED = -1, TOREAD_HTTP_HEADER = -2, TOREAD_HTTP_CHUNK_LENGTH = -3, TOREAD_HTTP_CHUNK_TRAILER = -4 }; struct ctl_natlook { objid_t id; int proc; struct sockaddr_storage src; struct sockaddr_storage dst; struct sockaddr_storage rsrc; struct sockaddr_storage rdst; in_port_t rsport; in_port_t rdport; int in; int proto; }; struct ctl_bindany { objid_t bnd_id; int bnd_proc; struct sockaddr_storage bnd_ss; in_port_t bnd_port; int bnd_proto; }; struct ctl_keyop { char cko_hash[TLS_CERT_HASH_SIZE]; int cko_proc; int cko_flen; int cko_tlen; int cko_padding; u_int cko_cookie; }; struct ctl_stats { objid_t id; int proc; u_int64_t interval; u_int64_t cnt; u_int32_t tick; u_int32_t avg; u_int32_t last; u_int32_t avg_hour; u_int32_t last_hour; u_int32_t avg_day; u_int32_t last_day; }; enum key_option { KEY_OPTION_NONE = 0, KEY_OPTION_APPEND, KEY_OPTION_SET, KEY_OPTION_REMOVE, KEY_OPTION_HASH, KEY_OPTION_LOG, KEY_OPTION_STRIP }; enum key_type { KEY_TYPE_NONE = 0, KEY_TYPE_COOKIE, KEY_TYPE_HEADER, KEY_TYPE_PATH, KEY_TYPE_QUERY, KEY_TYPE_URL, KEY_TYPE_MAX }; struct ctl_kvlen { ssize_t key; ssize_t value; }; struct ctl_rule { struct ctl_kvlen kvlen[KEY_TYPE_MAX]; }; enum digest_type { DIGEST_NONE = 0, DIGEST_SHA1 = 1, DIGEST_MD5 = 2 }; TAILQ_HEAD(kvlist, kv); RB_HEAD(kvtree, kv); struct kv { char *kv_key; char *kv_value; enum key_type kv_type; enum key_option kv_option; enum digest_type kv_digest; #define KV_FLAG_MACRO 0x01 #define KV_FLAG_INVALID 0x02 #define KV_FLAG_GLOBBING 0x04 u_int8_t kv_flags; struct kvlist kv_children; struct kv *kv_parent; TAILQ_ENTRY(kv) kv_entry; RB_ENTRY(kv) kv_node; /* A few pointers used by the rule actions */ struct kv *kv_match; struct kvtree *kv_matchtree; TAILQ_ENTRY(kv) kv_match_entry; TAILQ_ENTRY(kv) kv_rule_entry; TAILQ_ENTRY(kv) kv_action_entry; }; struct portrange { in_port_t val[2]; u_int8_t op; }; struct address { objid_t rdrid; struct sockaddr_storage ss; int ipproto; struct portrange port; char ifname[IFNAMSIZ]; TAILQ_ENTRY(address) entry; }; TAILQ_HEAD(addresslist, address); union hashkey { /* Simplified version of pf_poolhashkey */ u_int32_t data[4]; SIPHASH_KEY siphashkey; }; #define F_DISABLE 0x00000001 #define F_BACKUP 0x00000002 #define F_USED 0x00000004 #define F_DOWN 0x00000008 #define F_ADD 0x00000010 #define F_DEL 0x00000020 #define F_CHANGED 0x00000040 #define F_STICKY 0x00000080 #define F_CHECK_DONE 0x00000100 #define F_ACTIVE_RULESET 0x00000200 #define F_CHECK_SENT 0x00000400 #define F_TLS 0x00000800 #define F_NATLOOK 0x00001000 #define F_DEMOTE 0x00002000 #define F_LOOKUP_PATH 0x00004000 #define F_DEMOTED 0x00008000 #define F_UDP 0x00010000 #define F_RETURN 0x00020000 #define F_AGENTX 0x00040000 #define F_NEEDPF 0x00080000 #define F_PORT 0x00100000 #define F_TLSCLIENT 0x00200000 #define F_NEEDRT 0x00400000 #define F_MATCH 0x00800000 #define F_DIVERT 0x01000000 #define F_SCRIPT 0x02000000 #define F_TLSINSPECT 0x04000000 #define F_HASHKEY 0x08000000 #define F_AGENTX_TRAPONLY 0x10000000 #define F_BITS \ "\10\01DISABLE\02BACKUP\03USED\04DOWN\05ADD\06DEL\07CHANGED" \ "\10STICKY-ADDRESS\11CHECK_DONE\12ACTIVE_RULESET\13CHECK_SENT" \ "\14TLS\15NAT_LOOKUP\16DEMOTE\17LOOKUP_PATH\20DEMOTED\21UDP" \ "\22RETURN\23TRAP\24NEEDPF\25PORT\26TLS_CLIENT\27NEEDRT" \ "\30MATCH\31DIVERT\32SCRIPT\33TLS_INSPECT\34HASHKEY" \ "\35AGENTX_TRAPONLY" enum forwardmode { FWD_NORMAL = 0, FWD_ROUTE, FWD_TRANS }; struct host_config { objid_t id; objid_t parentid; objid_t tableid; int retry; char name[HOST_NAME_MAX+1]; struct sockaddr_storage ss; int ttl; int priority; }; struct host { TAILQ_ENTRY(host) entry; TAILQ_ENTRY(host) globalentry; SLIST_ENTRY(host) child; SLIST_HEAD(,host) children; struct host_config conf; u_int32_t flags; char *tablename; int up; int last_up; u_long check_cnt; u_long up_cnt; int retry_cnt; int idx; u_int16_t he; int code; struct ctl_tcp_event cte; }; TAILQ_HEAD(hostlist, host); enum host_error { HCE_NONE = 0, HCE_ABORT, HCE_INTERVAL_TIMEOUT, HCE_ICMP_OK, HCE_ICMP_READ_TIMEOUT, HCE_ICMP_WRITE_TIMEOUT, HCE_TCP_SOCKET_ERROR, HCE_TCP_SOCKET_LIMIT, HCE_TCP_SOCKET_OPTION, HCE_TCP_CONNECT_FAIL, HCE_TCP_CONNECT_TIMEOUT, HCE_TCP_CONNECT_OK, HCE_TCP_WRITE_TIMEOUT, HCE_TCP_WRITE_FAIL, HCE_TCP_READ_TIMEOUT, HCE_TCP_READ_FAIL, HCE_SCRIPT_OK, HCE_SCRIPT_FAIL, HCE_TLS_CONNECT_ERROR, HCE_TLS_CONNECT_FAIL, HCE_TLS_CONNECT_OK, HCE_TLS_CONNECT_TIMEOUT, HCE_TLS_READ_TIMEOUT, HCE_TLS_WRITE_TIMEOUT, HCE_TLS_READ_ERROR, HCE_TLS_WRITE_ERROR, HCE_SEND_EXPECT_FAIL, HCE_SEND_EXPECT_OK, HCE_HTTP_CODE_ERROR, HCE_HTTP_CODE_FAIL, HCE_HTTP_CODE_OK, HCE_HTTP_DIGEST_ERROR, HCE_HTTP_DIGEST_FAIL, HCE_HTTP_DIGEST_OK, }; enum host_status { HOST_DOWN = -1, HOST_UNKNOWN = 0, HOST_UP = 1 }; #define HOST_ISUP(x) (x == HOST_UP) struct table_config { objid_t id; objid_t rdrid; u_int32_t flags; int check; char demote_group[IFNAMSIZ]; char ifname[IFNAMSIZ]; struct timeval timeout; in_port_t port; int retcode; int skip_cnt; char name[TABLE_NAME_SIZE]; size_t name_len; char path[PATH_MAX]; unsigned char exbinbuf[128]; char exbuf[256]; char digest[41]; /* length of sha1 digest * 2 */ u_int8_t digest_type; enum forwardmode fwdmode; }; struct table { TAILQ_ENTRY(table) entry; struct table_config conf; int up; int skipped; struct hostlist hosts; struct tls_config *tls_cfg; struct ibuf *sendbinbuf; char *sendbuf; }; TAILQ_HEAD(tablelist, table); enum table_check { CHECK_NOCHECK = 0, CHECK_ICMP = 1, CHECK_TCP = 2, CHECK_HTTP_CODE = 3, CHECK_HTTP_DIGEST = 4, CHECK_BINSEND_EXPECT = 5, CHECK_SEND_EXPECT = 6, CHECK_SCRIPT = 7 }; struct rdr_config { objid_t id; u_int32_t flags; in_port_t port; objid_t table_id; objid_t backup_id; int mode; union hashkey key; char name[SRV_NAME_SIZE]; char tag[RD_TAG_NAME_SIZE]; struct timeval timeout; }; struct rdr { TAILQ_ENTRY(rdr) entry; struct rdr_config conf; struct addresslist virts; struct table *table; struct table *backup; /* use this if no host up */ struct ctl_stats stats; }; TAILQ_HEAD(rdrlist, rdr); struct rsession { objid_t se_id; objid_t se_relayid; struct sockaddr_storage se_sockname; struct ctl_relay_event se_in; struct ctl_relay_event se_out; void *se_priv; SIPHASH_CTX se_siphashctx; struct relay_table *se_table; struct relay_table *se_table0; struct event se_ev; struct timeval se_timeout; struct timeval se_tv_start; struct timeval se_tv_last; struct event se_inflightevt; int se_done; int se_retry; int se_retrycount; int se_connectcount; int se_haslog; struct evbuffer *se_log; struct relay *se_relay; struct ctl_natlook *se_cnl; int se_bnds; u_int16_t se_tag; u_int16_t se_label; int se_cid; pid_t se_pid; SPLAY_ENTRY(rsession) se_nodes; TAILQ_ENTRY(rsession) se_entry; }; SPLAY_HEAD(session_tree, rsession); TAILQ_HEAD(sessionlist, rsession); enum prototype { RELAY_PROTO_TCP = 0, RELAY_PROTO_HTTP, RELAY_PROTO_DNS }; enum relay_result { RES_DROP = 0, RES_PASS = 1, RES_FAIL = -1, RES_BAD = -2, RES_INTERNAL = -3 }; enum rule_action { RULE_ACTION_MATCH = 0, RULE_ACTION_PASS, RULE_ACTION_BLOCK }; struct rule_addr { struct sockaddr_storage addr; u_int8_t addr_mask; int addr_port; }; #define RELAY_ADDR_EQ(_a, _b) \ ((_a)->addr_mask == (_b)->addr_mask && \ sockaddr_cmp((struct sockaddr *)&(_a)->addr, \ (struct sockaddr *)&(_b)->addr, (_a)->addr_mask) == 0) #define RELAY_ADDR_CMP(_a, _b) \ sockaddr_cmp((struct sockaddr *)&(_a)->addr, \ (struct sockaddr *)(_b), (_a)->addr_mask) #define RELAY_ADDR_NEQ(_a, _b) \ ((_a)->addr_mask != (_b)->addr_mask || \ sockaddr_cmp((struct sockaddr *)&(_a)->addr, \ (struct sockaddr *)&(_b)->addr, (_a)->addr_mask) != 0) #define RELAY_AF_NEQ(_a, _b) \ (((_a) != AF_UNSPEC) && ((_b) != AF_UNSPEC) && \ ((_a) != (_b))) struct relay_rule { objid_t rule_id; objid_t rule_protoid; u_int rule_action; #define RULE_SKIP_PROTO 0 #define RULE_SKIP_DIR 1 #define RULE_SKIP_AF 2 #define RULE_SKIP_SRC 3 #define RULE_SKIP_DST 4 #define RULE_SKIP_METHOD 5 #define RULE_SKIP_COUNT 6 struct relay_rule *rule_skip[RULE_SKIP_COUNT]; #define RULE_FLAG_QUICK 0x01 u_int8_t rule_flags; int rule_label; int rule_tag; int rule_tagged; enum direction rule_dir; u_int rule_proto; int rule_af; struct rule_addr rule_src; struct rule_addr rule_dst; struct relay_table *rule_table; u_int rule_method; char rule_labelname[LABEL_NAME_SIZE]; char rule_tablename[TABLE_NAME_SIZE]; char rule_taggedname[TAG_NAME_SIZE]; char rule_tagname[TAG_NAME_SIZE]; struct ctl_rule rule_ctl; struct kv rule_kv[KEY_TYPE_MAX]; struct kvlist rule_kvlist; TAILQ_ENTRY(relay_rule) rule_entry; }; TAILQ_HEAD(relay_rules, relay_rule); #define TCPFLAG_NODELAY 0x01 #define TCPFLAG_NNODELAY 0x02 #define TCPFLAG_SACK 0x04 #define TCPFLAG_NSACK 0x08 #define TCPFLAG_BUFSIZ 0x10 #define TCPFLAG_IPTTL 0x20 #define TCPFLAG_IPMINTTL 0x40 #define TCPFLAG_NSPLICE 0x80 #define TCPFLAG_DEFAULT 0x00 #define TCPFLAG_BITS \ "\10\01NODELAY\02NO_NODELAY\03SACK\04NO_SACK" \ "\05SOCKET_BUFFER_SIZE\06IP_TTL\07IP_MINTTL\10NO_SPLICE" #define TLSFLAG_SSLV3 0x01 #define TLSFLAG_TLSV1_0 0x02 #define TLSFLAG_TLSV1_1 0x04 #define TLSFLAG_TLSV1_2 0x08 #define TLSFLAG_TLSV1_3 0x10 #define TLSFLAG_TLSV1 0x1e #define TLSFLAG_VERSION 0x1f #define TLSFLAG_CIPHER_SERVER_PREF 0x20 #define TLSFLAG_CLIENT_RENEG 0x40 #define TLSFLAG_DEFAULT \ (TLSFLAG_TLSV1_2|TLSFLAG_TLSV1_3|TLSFLAG_CIPHER_SERVER_PREF) #define TLSFLAG_BITS \ "\06\01sslv3\02tlsv1.0\03tlsv1.1\04tlsv1.2\05tlsv1.3" \ "\06cipher-server-preference\07client-renegotiation" #define TLSCIPHERS_DEFAULT "HIGH:!aNULL" #define TLSECDHECURVES_DEFAULT "default" #define TLSDHPARAM_DEFAULT "none" struct relay_ticket_key { uint32_t tt_keyrev; unsigned char tt_key[TLS_TICKET_KEY_SIZE]; }; #define TLS_SESSION_LIFETIME (2 * 3600) #define HTTPFLAG_WEBSOCKETS 0x01 struct keyname { TAILQ_ENTRY(keyname) entry; char *name; }; TAILQ_HEAD(keynamelist, keyname); struct protocol { objid_t id; u_int32_t flags; u_int8_t tcpflags; int tcpbufsiz; int tcpbacklog; u_int8_t tcpipttl; u_int8_t tcpipminttl; size_t httpheaderlen; int httpflags; u_int8_t tlsflags; char tlsciphers[768]; char tlsdhparams[128]; char tlsecdhecurves[128]; char tlsca[PATH_MAX]; char tlscacert[PATH_MAX]; char tlscakey[PATH_MAX]; char *tlscapass; struct keynamelist tlscerts; char name[MAX_NAME_SIZE]; int tickets; enum prototype type; char *style; int (*cmp)(struct rsession *, struct rsession *); void *(*validate)(struct rsession *, struct relay *, struct sockaddr_storage *, u_int8_t *, size_t); int (*request)(struct rsession *); void (*close)(struct rsession *); struct relay_rules rules; int rulecount; TAILQ_ENTRY(protocol) entry; }; TAILQ_HEAD(protolist, protocol); struct relay_table { struct table *rlt_table; u_int32_t rlt_flags; int rlt_mode; u_int32_t rlt_index; struct host *rlt_host[RELAY_MAXHOSTS]; int rlt_nhosts; TAILQ_ENTRY(relay_table) rlt_entry; }; TAILQ_HEAD(relaytables, relay_table); struct ca_pkey { char pkey_hash[TLS_CERT_HASH_SIZE]; EVP_PKEY *pkey; TAILQ_ENTRY(ca_pkey) pkey_entry; }; TAILQ_HEAD(ca_pkeylist, ca_pkey); struct relay_cert { objid_t cert_id; objid_t cert_relayid; int cert_fd; int cert_key_fd; int cert_ocsp_fd; EVP_PKEY *cert_pkey; TAILQ_ENTRY(relay_cert) cert_entry; }; TAILQ_HEAD(relaycertlist, relay_cert); struct relay_config { objid_t id; u_int32_t flags; objid_t proto; char name[HOST_NAME_MAX+1]; in_port_t port; in_port_t dstport; int dstretry; struct sockaddr_storage ss; struct sockaddr_storage dstss; struct sockaddr_storage dstaf; struct timeval timeout; enum forwardmode fwdmode; union hashkey hashkey; off_t tls_cakey_len; }; struct relay { TAILQ_ENTRY(relay) rl_entry; struct relay_config rl_conf; int rl_up; struct protocol *rl_proto; int rl_s; struct bufferevent *rl_bev; int rl_dsts; struct bufferevent *rl_dstbev; struct relaytables rl_tables; struct event rl_ev; struct event rl_evt; struct tls_config *rl_tls_cfg; struct tls_config *rl_tls_client_cfg; struct tls *rl_tls_ctx; int rl_tls_ca_fd; int rl_tls_cacert_fd; EVP_PKEY *rl_tls_pkey; X509 *rl_tls_cacertx509; char *rl_tls_cakey; EVP_PKEY *rl_tls_capkey; struct ctl_stats rl_stats[PROC_MAX_INSTANCES + 1]; struct session_tree rl_sessions; }; TAILQ_HEAD(relaylist, relay); enum dstmode { RELAY_DSTMODE_LOADBALANCE = 0, RELAY_DSTMODE_ROUNDROBIN, RELAY_DSTMODE_HASH, RELAY_DSTMODE_SRCHASH, RELAY_DSTMODE_LEASTSTATES, RELAY_DSTMODE_RANDOM }; #define RELAY_DSTMODE_DEFAULT RELAY_DSTMODE_ROUNDROBIN struct netroute_config { objid_t id; struct sockaddr_storage ss; int prefixlen; objid_t routerid; }; struct netroute { struct netroute_config nr_conf; TAILQ_ENTRY(netroute) nr_entry; TAILQ_ENTRY(netroute) nr_route; struct router *nr_router; }; TAILQ_HEAD(netroutelist, netroute); struct router_config { objid_t id; u_int32_t flags; char name[HOST_NAME_MAX+1]; char label[RT_LABEL_SIZE]; int nroutes; objid_t gwtable; in_port_t gwport; int rtable; int af; }; struct router { struct router_config rt_conf; struct table *rt_gwtable; struct netroutelist rt_netroutes; TAILQ_ENTRY(router) rt_entry; }; TAILQ_HEAD(routerlist, router); struct ctl_netroute { int up; struct host_config host; struct netroute_config nr; struct router_config rt; }; /* initially control.h */ struct control_sock { const char *cs_name; struct event cs_ev; struct event cs_evt; int cs_fd; int cs_restricted; void *cs_env; TAILQ_ENTRY(control_sock) cs_entry; }; TAILQ_HEAD(control_socks, control_sock); extern struct { struct event ev; int fd; } control_state; struct imsgev { struct imsgbuf ibuf; void (*handler)(int, short, void *); struct event ev; struct privsep_proc *proc; void *data; short events; }; #define IMSG_SIZE_CHECK(imsg, p) do { \ if (IMSG_DATA_SIZE(imsg) < sizeof(*p)) \ fatalx("bad length imsg received"); \ } while (0) #define IMSG_DATA_SIZE(imsg) ((imsg)->hdr.len - IMSG_HEADER_SIZE) struct ctl_conn { TAILQ_ENTRY(ctl_conn) entry; u_int8_t flags; u_int waiting; #define CTL_CONN_NOTIFY 0x01 struct imsgev iev; }; TAILQ_HEAD(ctl_connlist, ctl_conn); enum imsg_type { IMSG_NONE, IMSG_CTL_OK, /* answer to relayctl requests */ IMSG_CTL_FAIL, IMSG_CTL_VERBOSE, IMSG_CTL_PROCFD, IMSG_CTL_END, IMSG_CTL_RDR, IMSG_CTL_TABLE, IMSG_CTL_HOST, IMSG_CTL_RELAY, IMSG_CTL_SESSION, IMSG_CTL_ROUTER, IMSG_CTL_NETROUTE, IMSG_CTL_TABLE_CHANGED, IMSG_CTL_PULL_RULESET, IMSG_CTL_PUSH_RULESET, IMSG_CTL_SHOW_SUM, /* relayctl requests */ IMSG_CTL_RDR_ENABLE, IMSG_CTL_RDR_DISABLE, IMSG_CTL_TABLE_ENABLE, IMSG_CTL_TABLE_DISABLE, IMSG_CTL_HOST_ENABLE, IMSG_CTL_HOST_DISABLE, IMSG_CTL_SHUTDOWN, IMSG_CTL_START, IMSG_CTL_RELOAD, IMSG_CTL_RESET, IMSG_CTL_POLL, IMSG_CTL_NOTIFY, IMSG_CTL_RDR_STATS, IMSG_CTL_RELAY_STATS, IMSG_RDR_ENABLE, /* notifies from pfe to hce */ IMSG_RDR_DISABLE, IMSG_TABLE_ENABLE, IMSG_TABLE_DISABLE, IMSG_HOST_ENABLE, IMSG_HOST_DISABLE, IMSG_HOST_STATUS, /* notifies from hce to pfe */ IMSG_SYNC, IMSG_NATLOOK, IMSG_DEMOTE, IMSG_STATISTICS, IMSG_SCRIPT, IMSG_AGENTXSOCK, IMSG_BINDANY, IMSG_RTMSG, /* from pfe to parent */ IMSG_CFG_TABLE, /* configuration from parent */ IMSG_CFG_HOST, IMSG_CFG_RDR, IMSG_CFG_VIRT, IMSG_CFG_ROUTER, IMSG_CFG_ROUTE, IMSG_CFG_PROTO, IMSG_CFG_RULE, IMSG_CFG_RELAY, IMSG_CFG_RELAY_TABLE, IMSG_CFG_RELAY_CERT, IMSG_CFG_RELAY_FD, IMSG_CFG_DONE, IMSG_CA_PRIVENC, IMSG_CA_PRIVDEC, IMSG_SESS_PUBLISH, /* from relay to pfe */ IMSG_SESS_UNPUBLISH, IMSG_TLSTICKET_REKEY }; enum privsep_procid { PROC_ALL = -1, PROC_PARENT = 0, PROC_HCE, PROC_RELAY, PROC_PFE, PROC_CA, PROC_MAX }; extern enum privsep_procid privsep_process; /* Attach the control socket to the following process */ #define PROC_CONTROL PROC_PFE struct privsep_pipes { int *pp_pipes[PROC_MAX]; }; struct privsep { struct privsep_pipes *ps_pipes[PROC_MAX]; struct privsep_pipes *ps_pp; struct imsgev *ps_ievs[PROC_MAX]; const char *ps_title[PROC_MAX]; u_int8_t ps_what[PROC_MAX]; u_int ps_instances[PROC_MAX]; u_int ps_instance; struct control_sock ps_csock; struct control_socks ps_rcsocks; /* Event and signal handlers */ struct event ps_evsigint; struct event ps_evsigterm; struct event ps_evsigchld; struct event ps_evsighup; struct event ps_evsigpipe; struct event ps_evsigusr1; int ps_noaction; struct passwd *ps_pw; struct relayd *ps_env; }; struct privsep_proc { const char *p_title; enum privsep_procid p_id; int (*p_cb)(int, struct privsep_proc *, struct imsg *); void (*p_init)(struct privsep *, struct privsep_proc *); const char *p_chroot; struct privsep *p_ps; void (*p_shutdown)(void); struct passwd *p_pw; }; struct privsep_fd { enum privsep_procid pf_procid; unsigned int pf_instance; }; struct relayd_config { char tls_sid[SSL_MAX_SID_CTX_LENGTH]; char agentx_path[sizeof(((struct sockaddr_un *)NULL)->sun_path)]; char agentx_context[32]; struct timeval interval; struct timeval timeout; struct timeval statinterval; u_int16_t prefork_relay; u_int16_t opts; u_int32_t flags; }; struct pfdata { int dev; struct pf_anchor *anchor; struct pfioc_trans pft; struct pfioc_trans_e pfte; u_int8_t pfused; }; struct relayd { struct relayd_config sc_conf; const char *sc_conffile; struct pfdata *sc_pf; int sc_rtsock; int sc_rtseq; int sc_tablecount; int sc_rdrcount; int sc_protocount; int sc_relaycount; int sc_routercount; int sc_routecount; struct table sc_empty_table; struct protocol sc_proto_default; struct event sc_ev; struct tablelist *sc_tables; struct hostlist sc_hosts; struct rdrlist *sc_rdrs; struct protolist *sc_protos; struct relaylist *sc_relays; struct routerlist *sc_rts; struct netroutelist *sc_routes; struct ca_pkeylist *sc_pkeys; struct relaycertlist *sc_certs; struct sessionlist sc_sessions; char sc_demote_group[IFNAMSIZ]; u_int16_t sc_id; int sc_rtable; struct event sc_statev; struct event sc_agentxev; int sc_has_icmp; int sc_has_icmp6; struct ctl_icmp_event sc_icmp_send; struct ctl_icmp_event sc_icmp_recv; struct ctl_icmp_event sc_icmp6_send; struct ctl_icmp_event sc_icmp6_recv; struct relay_ticket_key sc_ticket; struct privsep *sc_ps; int sc_reload; }; #define RELAYD_OPT_VERBOSE 0x01 #define RELAYD_OPT_NOACTION 0x04 #define RELAYD_OPT_LOGUPDATE 0x08 #define RELAYD_OPT_LOGHOSTCHECK 0x10 #define RELAYD_OPT_LOGCON 0x20 #define RELAYD_OPT_LOGCONERR 0x40 /* control.c */ int control_init(struct privsep *, struct control_sock *); int control_listen(struct control_sock *); void control_cleanup(struct control_sock *); void control_dispatch_imsg(int, short, void *); void control_imsg_forward(struct privsep *ps, struct imsg *); struct ctl_conn * control_connbyfd(int); /* parse.y */ int parse_config(const char *, struct relayd *); int load_config(const char *, struct relayd *); int cmdline_symset(char *); /* util.c */ const char *host_error(enum host_error); const char *host_status(enum host_status); const char *table_check(enum table_check); #ifdef DEBUG const char *relay_state(enum relay_state); #endif const char *print_availability(u_long, u_long); const char *print_host(struct sockaddr_storage *, char *, size_t); const char *print_time(struct timeval *, struct timeval *, char *, size_t); const char *printb_flags(const u_int32_t, const char *); void getmonotime(struct timeval *); struct ibuf *string2binary(const char *); void print_hex(uint8_t *, off_t, size_t); void print_debug(const char *, ...); /* pfe.c */ void pfe(struct privsep *, struct privsep_proc *); void show(struct ctl_conn *); void show_sessions(struct ctl_conn *); int enable_rdr(struct ctl_conn *, struct ctl_id *); int enable_table(struct ctl_conn *, struct ctl_id *); int enable_host(struct ctl_conn *, struct ctl_id *, struct host *); int disable_rdr(struct ctl_conn *, struct ctl_id *); int disable_table(struct ctl_conn *, struct ctl_id *); int disable_host(struct ctl_conn *, struct ctl_id *, struct host *); /* pfe_filter.c */ void init_tables(struct relayd *); void flush_table(struct relayd *, struct rdr *); void sync_table(struct relayd *, struct rdr *, struct table *); void sync_ruleset(struct relayd *, struct rdr *, int); void flush_rulesets(struct relayd *); int natlook(struct relayd *, struct ctl_natlook *); u_int64_t check_table(struct relayd *, struct rdr *, struct table *); /* pfe_route.c */ void init_routes(struct relayd *); void sync_routes(struct relayd *, struct router *); int pfe_route(struct relayd *, struct ctl_netroute *); /* hce.c */ void hce(struct privsep *, struct privsep_proc *); void hce_notify_done(struct host *, enum host_error); /* relay.c */ void relay(struct privsep *, struct privsep_proc *); int relay_privinit(struct relay *); void relay_notify_done(struct host *, const char *); int relay_session_cmp(struct rsession *, struct rsession *); void relay_close(struct rsession *, const char *, int); int relay_reset_event(struct rsession *, struct ctl_relay_event *); void relay_natlook(int, short, void *); void relay_session(struct rsession *); int relay_from_table(struct rsession *); int relay_socket_af(struct sockaddr_storage *, in_port_t); in_port_t relay_socket_getport(struct sockaddr_storage *); int relay_cmp_af(struct sockaddr_storage *, struct sockaddr_storage *); void relay_write(struct bufferevent *, void *); void relay_read(struct bufferevent *, void *); int relay_splice(struct ctl_relay_event *); int relay_splicelen(struct ctl_relay_event *); int relay_spliceadjust(struct ctl_relay_event *); void relay_error(struct bufferevent *, short, void *); int relay_preconnect(struct rsession *); int relay_connect(struct rsession *); void relay_connected(int, short, void *); void relay_bindanyreq(struct rsession *, in_port_t, int); void relay_bindany(int, short, void *); void relay_dump(struct ctl_relay_event *, const void *, size_t); int relay_bufferevent_add(struct event *, int); int relay_bufferevent_print(struct ctl_relay_event *, const char *); int relay_bufferevent_write_buffer(struct ctl_relay_event *, struct evbuffer *); int relay_bufferevent_write_chunk(struct ctl_relay_event *, struct evbuffer *, size_t); int relay_bufferevent_write(struct ctl_relay_event *, void *, size_t); int relay_test(struct protocol *, struct ctl_relay_event *); void relay_calc_skip_steps(struct relay_rules *); void relay_match(struct kvlist *, struct kv *, struct kv *, struct kvtree *); void relay_session_insert(struct rsession *); void relay_session_remove(struct rsession *); void relay_session_publish(struct rsession *); void relay_session_unpublish(struct rsession *); SPLAY_PROTOTYPE(session_tree, rsession, se_nodes, relay_session_cmp); /* relay_http.c */ void relay_http(struct relayd *); void relay_http_init(struct relay *); void relay_abort_http(struct rsession *, u_int, const char *, u_int16_t); void relay_read_http(struct bufferevent *, void *); void relay_close_http(struct rsession *); u_int relay_httpmethod_byname(const char *); const char *relay_httpmethod_byid(u_int); const char *relay_httperror_byid(u_int); int relay_http_priv_init(struct rsession *); int relay_httpdesc_init(struct ctl_relay_event *); ssize_t relay_http_time(time_t, char *, size_t); /* relay_udp.c */ void relay_udp_privinit(struct relay *); void relay_udp_init(struct relayd *, struct relay *); int relay_udp_bind(struct sockaddr_storage *, in_port_t, struct protocol *); void relay_udp_server(int, short, void *); /* check_icmp.c */ void icmp_init(struct relayd *); void schedule_icmp(struct relayd *, struct host *); void check_icmp(struct relayd *, struct timeval *); /* check_tcp.c */ void check_tcp(struct ctl_tcp_event *); /* check_tls.c */ void check_tls(struct ctl_tcp_event *); /* check_script.c */ void check_script(struct relayd *, struct host *); void script_done(struct relayd *, struct ctl_script *); int script_exec(struct relayd *, struct ctl_script *); /* ssl.c */ void ssl_init(struct relayd *); char *ssl_load_key(struct relayd *, const char *, off_t *, char *); uint8_t *ssl_update_certificate(const uint8_t *, size_t, EVP_PKEY *, EVP_PKEY *, X509 *, size_t *); int ssl_load_pkey(char *, off_t, X509 **, EVP_PKEY **); /* ca.c */ void ca(struct privsep *, struct privsep_proc *); void ca_engine_init(struct relayd *); void hash_x509(X509 *cert, char *hash, size_t hashlen); /* relayd.c */ struct host *host_find(struct relayd *, objid_t); struct table *table_find(struct relayd *, objid_t); struct rdr *rdr_find(struct relayd *, objid_t); struct netroute *route_find(struct relayd *, objid_t); struct router *router_find(struct relayd *, objid_t); struct host *host_findbyname(struct relayd *, const char *); struct table *table_findbyname(struct relayd *, const char *); struct table *table_findbyconf(struct relayd *, struct table *); struct rdr *rdr_findbyname(struct relayd *, const char *); void event_again(struct event *, int, short, void (*)(int, short, void *), struct timeval *, struct timeval *, void *); struct relay *relay_find(struct relayd *, objid_t); struct protocol *proto_find(struct relayd *, objid_t); struct rsession *session_find(struct relayd *, objid_t); struct relay *relay_findbyname(struct relayd *, const char *); struct relay *relay_findbyaddr(struct relayd *, struct relay_config *); EVP_PKEY *pkey_find(struct relayd *, char *hash); struct ca_pkey *pkey_add(struct relayd *, EVP_PKEY *, char *hash); struct relay_cert *cert_add(struct relayd *, objid_t); struct relay_cert *cert_find(struct relayd *, objid_t); char *relay_load_fd(int, off_t *); int relay_load_certfiles(struct relayd *, struct relay *, const char *); int expand_string(char *, size_t, const char *, const char *); void translate_string(char *); void purge_key(char **, off_t); void purge_table(struct relayd *, struct tablelist *, struct table *); void purge_relay(struct relayd *, struct relay *); char *digeststr(enum digest_type, const u_int8_t *, size_t, char *); const char *canonicalize_host(const char *, char *, size_t); int parse_url(const char *, char **, char **, char **); int map6to4(struct sockaddr_storage *); int map4to6(struct sockaddr_storage *, struct sockaddr_storage *); void imsg_event_add(struct imsgev *); int imsg_compose_event(struct imsgev *, u_int16_t, u_int32_t, pid_t, int, void *, u_int16_t); void socket_rlimit(int); char *get_string(u_int8_t *, size_t); void *get_data(u_int8_t *, size_t); int sockaddr_cmp(struct sockaddr *, struct sockaddr *, int); struct in6_addr *prefixlen2mask6(u_int8_t, u_int32_t *); u_int32_t prefixlen2mask(u_int8_t); int accept_reserve(int, struct sockaddr *, socklen_t *, int, volatile int *); struct kv *kv_add(struct kvtree *, char *, char *, int); int kv_set(struct kv *, char *, ...) __attribute__((__format__ (printf, 2, 3))); int kv_setkey(struct kv *, char *, ...) __attribute__((__format__ (printf, 2, 3))); void kv_delete(struct kvtree *, struct kv *); struct kv *kv_extend(struct kvtree *, struct kv *, char *); void kv_purge(struct kvtree *); void kv_free(struct kv *); struct kv *kv_inherit(struct kv *, struct kv *); void relay_log(struct rsession *, char *); int kv_log(struct rsession *, struct kv *, u_int16_t, enum direction); struct kv *kv_find(struct kvtree *, struct kv *); struct kv *kv_find_value(struct kvtree *, char *, const char *, const char *); int kv_cmp(struct kv *, struct kv *); int rule_add(struct protocol *, struct relay_rule *, const char *); void rule_delete(struct relay_rules *, struct relay_rule *); void rule_free(struct relay_rule *); struct relay_rule *rule_inherit(struct relay_rule *); void rule_settable(struct relay_rules *, struct relay_table *); RB_PROTOTYPE(kvtree, kv, kv_node, kv_cmp); /* carp.c */ int carp_demote_init(char *, int); void carp_demote_shutdown(void); int carp_demote_get(char *); int carp_demote_set(char *, int); int carp_demote_reset(char *, int); /* name2id.c */ u_int16_t label_name2id(const char *); const char *label_id2name(u_int16_t); void label_unref(u_int16_t); void label_ref(u_int16_t); u_int16_t tag_name2id(const char *); const char *tag_id2name(u_int16_t); void tag_unref(u_int16_t); void tag_ref(u_int16_t); /* agentx_control.c */ void agentx_init(struct relayd *); void agentx_setsock(struct relayd *, enum privsep_procid); int agentx_getsock(struct imsg *); void snmp_hosttrap(struct relayd *, struct table *, struct host *); /* shuffle.c */ void shuffle_init(struct shuffle *); u_int16_t shuffle_generate16(struct shuffle *); /* log.c */ void log_init(int, int); void log_procinit(const char *); void log_setverbose(int); int log_getverbose(void); void log_warn(const char *, ...) __attribute__((__format__ (printf, 1, 2))); void log_warnx(const char *, ...) __attribute__((__format__ (printf, 1, 2))); void log_info(const char *, ...) __attribute__((__format__ (printf, 1, 2))); void log_debug(const char *, ...) __attribute__((__format__ (printf, 1, 2))); void logit(int, const char *, ...) __attribute__((__format__ (printf, 2, 3))); void vlog(int, const char *, va_list) __attribute__((__format__ (printf, 2, 0))); __dead void fatal(const char *, ...) __attribute__((__format__ (printf, 1, 2))); __dead void fatalx(const char *, ...) __attribute__((__format__ (printf, 1, 2))); /* proc.c */ enum privsep_procid proc_getid(struct privsep_proc *, unsigned int, const char *); int proc_flush_imsg(struct privsep *, enum privsep_procid, int); void proc_init(struct privsep *, struct privsep_proc *, unsigned int, int, int, char **, enum privsep_procid); void proc_kill(struct privsep *); void proc_connect(struct privsep *); void proc_dispatch(int, short event, void *); void proc_run(struct privsep *, struct privsep_proc *, struct privsep_proc *, unsigned int, void (*)(struct privsep *, struct privsep_proc *, void *), void *); void proc_range(struct privsep *, enum privsep_procid, int *, int *); int proc_compose_imsg(struct privsep *, enum privsep_procid, int, u_int16_t, u_int32_t, int, void *, u_int16_t); int proc_compose(struct privsep *, enum privsep_procid, uint16_t, void *, uint16_t); int proc_composev_imsg(struct privsep *, enum privsep_procid, int, u_int16_t, u_int32_t, int, const struct iovec *, int); int proc_composev(struct privsep *, enum privsep_procid, uint16_t, const struct iovec *, int); int proc_forward_imsg(struct privsep *, struct imsg *, enum privsep_procid, int); struct imsgbuf * proc_ibuf(struct privsep *, enum privsep_procid, int); struct imsgev * proc_iev(struct privsep *, enum privsep_procid, int); void imsg_event_add(struct imsgev *); int imsg_compose_event(struct imsgev *, uint16_t, uint32_t, pid_t, int, void *, uint16_t); int imsg_composev_event(struct imsgev *, uint16_t, uint32_t, pid_t, int, const struct iovec *, int); /* config.c */ int config_init(struct relayd *); void config_purge(struct relayd *, u_int); int config_setreset(struct relayd *, u_int); int config_getreset(struct relayd *, struct imsg *); int config_getcfg(struct relayd *, struct imsg *); int config_settable(struct relayd *, struct table *); int config_gettable(struct relayd *, struct imsg *); int config_gethost(struct relayd *, struct imsg *); int config_setrdr(struct relayd *, struct rdr *); int config_getrdr(struct relayd *, struct imsg *); int config_getvirt(struct relayd *, struct imsg *); int config_setrt(struct relayd *, struct router *); int config_getrt(struct relayd *, struct imsg *); int config_getroute(struct relayd *, struct imsg *); int config_setproto(struct relayd *, struct protocol *); int config_getproto(struct relayd *, struct imsg *); int config_setrule(struct relayd *, struct protocol *); int config_getrule(struct relayd *, struct imsg *); int config_setrelay(struct relayd *, struct relay *); int config_getrelay(struct relayd *, struct imsg *); int config_getrelaytable(struct relayd *, struct imsg *); int config_getrelayfd(struct relayd *, struct imsg *); #endif /* RELAYD_H */