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/* $OpenBSD: pppoe.h,v 1.9 2011/07/04 16:29:35 sthen Exp $ */
/*
* Copyright (c) 2000 Network Security Technologies, Inc. http://www.netsec.net
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/* XXX */
#ifndef ETHERTYPE_PPPOEDISC
#define ETHERTYPE_PPPOEDISC 0x8863 /* PPP Over Ethernet Discovery Stage */
#endif
#ifndef ETHERTYPE_PPPOE
#define ETHERTYPE_PPPOE 0x8864 /* PPP Over Ethernet Session Stage */
#endif
#define PPPOE_MAXSESSIONS 32
#define PPPOE_BPF_BUFSIZ 65536
struct pppoe_header {
u_int8_t vertype; /* PPPoE version (low 4), type (high 4) */
u_int8_t code; /* PPPoE code (packet type) */
u_int16_t sessionid; /* PPPoE session id */
u_int16_t len; /* PPPoE payload length */
};
#define PPPOE_MTU (ETHERMTU - sizeof(struct pppoe_header))
#define PPPOE_VER_S 0 /* Version shift */
#define PPPOE_VER_M 0x0f /* Version mask */
#define PPPOE_TYPE_S 4 /* Type shift */
#define PPPOE_TYPE_M 0xf0 /* Type mask */
#define PPPOE_VER(vt) (((vt) & PPPOE_VER_M) >> PPPOE_VER_S)
#define PPPOE_TYPE(vt) (((vt) & PPPOE_TYPE_M) >> PPPOE_TYPE_S)
#define PPPOE_VERTYPE(v,t) \
((((v) << PPPOE_VER_S) & PPPOE_VER_M) | \
(((t) << PPPOE_TYPE_S) & PPPOE_TYPE_M))
#define PPPOE_CODE_SESSION 0x00 /* Session */
#define PPPOE_CODE_PADO 0x07 /* Active Discovery Offer */
#define PPPOE_CODE_PADI 0x09 /* Active Discovery Initiation */
#define PPPOE_CODE_PADR 0x19 /* Active Discovery Request */
#define PPPOE_CODE_PADS 0x65 /* Active Discovery Session-Confirm */
#define PPPOE_CODE_PADT 0xa7 /* Active Discovery Terminate */
struct pppoe_tag {
u_int16_t type; /* Tag Type */
u_int16_t len; /* Tag Length */
u_int8_t *val; /* Tag Value */
};
#define PPPOE_TAG_END_OF_LIST 0x0000 /* End Of List */
#define PPPOE_TAG_SERVICE_NAME 0x0101 /* Service Name */
#define PPPOE_TAG_AC_NAME 0x0102 /* Access Concentrator Name */
#define PPPOE_TAG_HOST_UNIQ 0x0103 /* Host Uniq */
#define PPPOE_TAG_AC_COOKIE 0x0104 /* Access Concentratr Cookie */
#define PPPOE_TAG_VENDOR_SPEC 0x0105 /* Vendor Specific */
#define PPPOE_TAG_RELAY_SESSION 0x0110 /* Relay Session Id */
#define PPPOE_TAG_SERVICE_NAME_ERROR 0x0201 /* Service Name Error */
#define PPPOE_TAG_AC_SYSTEM_ERROR 0x0202 /* Acc. Concentrator Error */
#define PPPOE_TAG_GENERIC_ERROR 0x0203 /* Generic Error */
extern int option_verbose;
extern u_char etherbroadcastaddr[];
void server_mode(int, u_int8_t *, u_int8_t *, struct ether_addr *);
int client_mode(int, u_int8_t *, u_int8_t *, struct ether_addr *);
struct tag_list {
LIST_HEAD(, tag_node) thelist;
};
struct tag_node {
LIST_ENTRY(tag_node) next;
u_int16_t type;
u_int16_t len;
u_int8_t *val;
int _ref;
};
void tag_init(struct tag_list *);
void tag_destroy(struct tag_list *);
struct tag_node *tag_lookup(struct tag_list *, u_int16_t, int);
int tag_add(struct tag_list *, u_int16_t, u_int16_t, u_int8_t *);
int tag_pkt(struct tag_list *, u_long, u_int8_t *);
void tag_hton(struct tag_list *);
struct pppoe_session {
LIST_ENTRY(pppoe_session) s_next;
struct ether_addr s_ea; /* remote ethernet mac */
u_int16_t s_id; /* session id */
int s_fd; /* ttyfd */
int s_first;
};
struct pppoe_session_master {
LIST_HEAD(, pppoe_session) sm_sessions; /* session list */
int sm_nsessions; /* # of sessions */
};
extern struct pppoe_session_master session_master;
void session_destroy(struct pppoe_session *);
struct pppoe_session *session_new(struct ether_addr *);
struct pppoe_session *session_find_eaid(struct ether_addr *, u_int16_t);
int runppp(int, u_int8_t *);
int bpf_to_ppp(int, u_long, u_int8_t *);
int ppp_to_bpf(int, int, struct ether_addr *, struct ether_addr *, u_int16_t);
int send_padt(int, struct ether_addr *, struct ether_addr *, u_int16_t);
void debug_packet(u_int8_t *, int);
u_int32_t cookie_bake(void);
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