1 /* PPPoE support library "libpppoe"
3 * Copyright 2000 Michal Ostrowski <mostrows@styx.uwaterloo.ca>,
4 * Jamal Hadi Salim <hadi@cyberus.ca>
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
14 #include <stdio.h> /* stdio */
15 #include <stdlib.h> /* strtoul(), realloc() */
16 #include <unistd.h> /* STDIN_FILENO,exec */
17 #include <string.h> /* memcpy() */
18 #include <errno.h> /* errno */
25 #include <sys/types.h> /* socket types */
26 #include <asm/types.h>
29 #include <sys/fcntl.h>
30 #include <sys/ioctl.h> /* ioctl() */
31 #include <sys/select.h>
32 #include <sys/socket.h> /* socket() */
33 #include <net/if.h> /* ifreq struct */
34 #include <net/if_arp.h>
35 #include <netinet/in.h>
37 #if __GLIBC__ >= 2 && __GLIBC_MINOR >= 1
38 #include <netpacket/packet.h>
39 //#include <net/ethernet.h>
41 #include <asm/types.h>
42 #include <linux/if_packet.h>
43 #include <linux/if_ether.h>
47 #include <asm/byteorder.h>
50 jamal: we really have to change this
51 to make it compatible to the 2.2 and
55 #include <linux/if_pppox.h>
60 #define DISCONNECTED 0
63 #define _PATH_PPPD "/usr/sbin/pppd"
67 #define LOG_PPPOE LOG_DAEMON
71 #define VERSION_MAJOR 0
72 #define VERSION_MINOR 4
73 #define VERSION_DATE 991120
75 /* Bigger than the biggest ethernet packet we'll ever see, in bytes */
76 #define MAX_PACKET 2000
78 /* references: RFC 2516 */
79 /* ETHER_TYPE fields for PPPoE */
81 #define ETH_P_PPPOE_DISC 0x8863 /* discovery stage */
82 #define ETH_P_PPPOE_SESS 0x8864
84 /* ethernet broadcast address */
85 #define MAC_BCAST_ADDR "\xff\xff\xff\xff\xff\xff"
87 /* Format for parsing long device-name */
89 #define FMTSTRING(size) "%x:%x:%x:%x:%x:%x/%x/%" _STR(size) "s"
91 /* maximum payload length */
92 #define MAX_PAYLOAD 1484
100 /* PPPoE packet; includes Ethernet headers and such */
102 struct sockaddr_ll addr;
103 struct pppoe_tag *tags[MAX_TAGS];
104 struct pppoe_hdr *hdr;
105 char buf[MAX_PAYLOAD]; /* buffer in which tags are held */
107 /* Defines meaning of each "tags" element */
109 #define TAG_SRV_NAME 0
110 #define TAG_AC_NAME 1
111 #define TAG_HOST_UNIQ 2
112 #define TAG_AC_COOKIE 3
114 #define TAG_RELAY_SID 5
115 #define TAG_SRV_ERR 6
116 #define TAG_SYS_ERR 7
117 #define TAG_GEN_ERR 8
120 static int tag_map[] = { PTT_SRV_NAME,
134 int DEB_DISC,DEB_DISC2;
136 #define DEB_DISC (opt_debug & 0x0002)
137 #define DEB_DISC2 (opt_debug & 0x0004)
139 #define MAX_FNAME 256
144 /* return <0 --> fatal error; abor
145 return =0 --> ok, proceed
146 return >0 --> ok, qui
148 typedef int (*packet_cb_t)(struct session* ses,
149 struct pppoe_packet *p_in,
150 struct pppoe_packet **p_out);
152 /* various override filter tags */
154 struct pppoe_tag *stag; /* service name tag override */
155 struct pppoe_tag *ntag; /*AC name override */
156 struct pppoe_tag *htag; /* hostuniq override */
161 } __attribute__ ((packed));
164 struct pppoe_tag *make_filter_tag(short type, short length, char* data);
166 /* Session type definitions */
167 #define SESSION_CLIENT 0
168 #define SESSION_SERVER 1
169 #define SESSION_RELAY 2
179 int ifindex; /* index of device */
180 char name[IFNAMSIZ]; /*dev name */
181 struct pppoe_packet curr_pkt;
183 packet_cb_t init_disc;
184 packet_cb_t rcv_pado;
185 packet_cb_t rcv_padi;
186 packet_cb_t rcv_pads;
187 packet_cb_t rcv_padr;
188 packet_cb_t rcv_padt;
194 struct sockaddr_ll local;
195 struct sockaddr_ll remote;
196 struct sockaddr_pppox sp;
197 int fd; /* fd of PPPoE socket */
201 int retransmits; /* Number of retransmission performed
202 if < 0 , retransmissions disabled */
212 char fwd_name[IFNAMSIZ]; /* Name of device to forward to */
213 } __attribute__ ((packed));
216 retransmit retries for the PADR and PADI packets
228 /* Structure for keeping track of connection relays */
230 struct pppoe_con *next;
236 char client[ETH_ALEN];
237 char server[ETH_ALEN];
242 /* Functions exported from utils.c. */
244 /* Functions exported from pppoehash.c */
245 struct pppoe_con *get_con(int len, char *key);
246 int store_con(struct pppoe_con *pc);
247 struct pppoe_con *delete_con(unsigned long len, char *key);
249 /* exported by lib.c */
251 extern int init_lib();
253 extern int get_sockaddr_ll(const char *devnam,struct sockaddr_ll* sll);
255 extern int client_init_ses (struct session *ses, char* devnam);
256 extern int relay_init_ses(struct session *ses, char* from, char* to);
257 extern int srv_init_ses(struct session *ses, char* from);
258 extern int session_connect(struct session *ses);
259 extern int session_disconnect(struct session*ses);
261 extern int verify_packet( struct session *ses, struct pppoe_packet *p);
263 extern void copy_tag(struct pppoe_packet *dest, struct pppoe_tag *pt);
264 extern struct pppoe_tag *get_tag(struct pppoe_hdr *ph, u_int16_t idx);
265 extern int send_disc(struct session *ses, struct pppoe_packet *p);
268 extern int add_client(char *addr);
270 /* Make connections (including spawning pppd) as server/client */
271 extern int ppp_connect(struct session *ses);
278 #define poe_dbglog(ses,a,b...) dbglog(a, ## b)
279 #define poe_info(ses,a,b...) info(a, ## b)
280 #define poe_notice(ses,a,b...) notice(a, ## b)
281 #define poe_warn(ses,a,b...) warn(a, ## b)
282 #define poe_error(ses,a,b...) error(a, ## b)
283 #define poe_fatal(ses,a,b...) fatal(a, ## b)
285 #define poe_dbglog(a,b...)
286 #define poe_info(a,b...)
287 #define poe_notice(a,b...)
288 #define poe_warn(a,b...)
289 #define poe_error(a,b...)
290 #define poe_fatal(a,b...)