--- /dev/null
+/* PPPoE support library "libpppoe"
+ *
+ * Copyright 2000 Michal Ostrowski <mostrows@styx.uwaterloo.ca>,
+ * Jamal Hadi Salim <hadi@cyberus.ca>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#ifndef PPPOE_H
+#define PPPOE_H 1
+#include <stdio.h> /* stdio */
+#include <stdlib.h> /* strtoul(), realloc() */
+#include <unistd.h> /* STDIN_FILENO,exec */
+#include <string.h> /* memcpy() */
+#include <errno.h> /* errno */
+#include <signal.h>
+#include <getopt.h>
+#include <stdarg.h>
+#include <syslog.h>
+#include <paths.h>
+
+#include <sys/types.h> /* socket types */
+#include <asm/types.h>
+#include <sys/time.h>
+#include <sys/wait.h>
+#include <sys/fcntl.h>
+#include <sys/ioctl.h> /* ioctl() */
+#include <sys/select.h>
+#include <sys/socket.h> /* socket() */
+#include <net/if.h> /* ifreq struct */
+#include <net/if_arp.h>
+#include <netinet/in.h>
+
+#if __GLIBC__ >= 2 && __GLIBC_MINOR >= 1
+#include <netpacket/packet.h>
+//#include <net/ethernet.h>
+#else
+#include <asm/types.h>
+#include <linux/if_packet.h>
+#include <linux/if_ether.h>
+#endif
+
+
+#include <asm/byteorder.h>
+
+/*
+ jamal: we really have to change this
+ to make it compatible to the 2.2 and
+ 2.3 kernel
+*/
+
+#include <linux/if_pppox.h>
+
+
+#define CONNECTED 1
+#define DISCONNECTED 0
+
+#ifndef _PATH_PPPD
+#define _PATH_PPPD "/usr/sbin/pppd"
+#endif
+
+#ifndef LOG_PPPOE
+#define LOG_PPPOE LOG_DAEMON
+#endif
+
+
+#define VERSION_MAJOR 0
+#define VERSION_MINOR 4
+#define VERSION_DATE 991120
+
+/* Bigger than the biggest ethernet packet we'll ever see, in bytes */
+#define MAX_PACKET 2000
+
+/* references: RFC 2516 */
+/* ETHER_TYPE fields for PPPoE */
+
+#define ETH_P_PPPOE_DISC 0x8863 /* discovery stage */
+#define ETH_P_PPPOE_SESS 0x8864
+
+/* ethernet broadcast address */
+#define MAC_BCAST_ADDR "\xff\xff\xff\xff\xff\xff"
+
+/* Format for parsing long device-name */
+#define _STR(x) #x
+#define FMTSTRING(size) "%x:%x:%x:%x:%x:%x/%x/%" _STR(size) "s"
+
+/* maximum payload length */
+#define MAX_PAYLOAD 1484
+
+
+
+/* PPPoE tag types */
+#define MAX_TAGS 11
+
+
+/* PPPoE packet; includes Ethernet headers and such */
+struct pppoe_packet{
+ struct sockaddr_ll addr;
+ struct pppoe_tag *tags[MAX_TAGS];
+ struct pppoe_hdr *hdr;
+ char buf[MAX_PAYLOAD]; /* buffer in which tags are held */
+};
+/* Defines meaning of each "tags" element */
+
+#define TAG_SRV_NAME 0
+#define TAG_AC_NAME 1
+#define TAG_HOST_UNIQ 2
+#define TAG_AC_COOKIE 3
+#define TAG_VENDOR 4
+#define TAG_RELAY_SID 5
+#define TAG_SRV_ERR 6
+#define TAG_SYS_ERR 7
+#define TAG_GEN_ERR 8
+#define TAG_EOL 9
+
+static int tag_map[] = { PTT_SRV_NAME,
+ PTT_AC_NAME,
+ PTT_HOST_UNIQ,
+ PTT_AC_COOKIE,
+ PTT_VENDOR,
+ PTT_RELAY_SID,
+ PTT_SRV_ERR,
+ PTT_SYS_ERR,
+ PTT_GEN_ERR,
+ PTT_EOL
+};
+
+
+/* Debug flags */
+int DEB_DISC,DEB_DISC2;
+/*
+ #define DEB_DISC (opt_debug & 0x0002)
+ #define DEB_DISC2 (opt_debug & 0x0004)
+*/
+#define MAX_FNAME 256
+
+
+struct session;
+
+/* return <0 --> fatal error; abor
+ return =0 --> ok, proceed
+ return >0 --> ok, qui
+*/
+typedef int (*packet_cb_t)(struct session* ses,
+ struct pppoe_packet *p_in,
+ struct pppoe_packet **p_out);
+
+/* various override filter tags */
+struct filter {
+ struct pppoe_tag *stag; /* service name tag override */
+ struct pppoe_tag *ntag; /*AC name override */
+ struct pppoe_tag *htag; /* hostuniq override */
+ int num_restart;
+ int peermode;
+ char *fname;
+ char *pppd;
+} __attribute__ ((packed));
+
+
+struct pppoe_tag *make_filter_tag(short type, short length, char* data);
+
+/* Session type definitions */
+#define SESSION_CLIENT 0
+#define SESSION_SERVER 1
+#define SESSION_RELAY 2
+
+struct session {
+
+ /* Administrative */
+ int type;
+ int opt_debug;
+ int detached;
+ int np;
+ int log_to_fd;
+ int ifindex; /* index of device */
+ char name[IFNAMSIZ]; /*dev name */
+ struct pppoe_packet curr_pkt;
+
+ packet_cb_t init_disc;
+ packet_cb_t rcv_pado;
+ packet_cb_t rcv_padi;
+ packet_cb_t rcv_pads;
+ packet_cb_t rcv_padr;
+ packet_cb_t rcv_padt;
+ packet_cb_t timeout;
+
+
+ /* Generic */
+ struct filter *filt;
+ struct sockaddr_ll local;
+ struct sockaddr_ll remote;
+ struct sockaddr_pppox sp;
+ int fd; /* fd of PPPoE socket */
+
+
+ /* For client */
+ int retransmits; /* Number of retransmission performed
+ if < 0 , retransmissions disabled */
+ int retries;
+ int state;
+ int opt_daemonize;
+
+ /* For server */
+ int fork;
+
+ /* For forwarding */
+ int fwd_sock;
+ char fwd_name[IFNAMSIZ]; /* Name of device to forward to */
+} __attribute__ ((packed));
+
+/*
+ retransmit retries for the PADR and PADI packets
+ during discovery
+*/
+int PADR_ret;
+int PADI_ret;
+
+int log_to_fd;
+int ctrl_fd;
+int opt_debug;
+int opt_daemonize;
+
+
+/* Structure for keeping track of connection relays */
+struct pppoe_con{
+ struct pppoe_con *next;
+ int id;
+ int connected;
+ int cl_sock;
+ int sv_sock;
+ int ref_count;
+ char client[ETH_ALEN];
+ char server[ETH_ALEN];
+ char key_len;
+ char key[32];
+};
+
+/* Functions exported from utils.c. */
+
+/* Functions exported from pppoehash.c */
+struct pppoe_con *get_con(int len, char *key);
+int store_con(struct pppoe_con *pc);
+struct pppoe_con *delete_con(unsigned long len, char *key);
+
+/* exported by lib.c */
+
+extern int init_lib();
+
+extern int get_sockaddr_ll(const char *devnam,struct sockaddr_ll* sll);
+
+extern int client_init_ses (struct session *ses, char* devnam);
+extern int relay_init_ses(struct session *ses, char* from, char* to);
+extern int srv_init_ses(struct session *ses, char* from);
+extern int session_connect(struct session *ses);
+extern int session_disconnect(struct session*ses);
+
+extern int verify_packet( struct session *ses, struct pppoe_packet *p);
+
+extern void copy_tag(struct pppoe_packet *dest, struct pppoe_tag *pt);
+extern struct pppoe_tag *get_tag(struct pppoe_hdr *ph, u_int16_t idx);
+extern int send_disc(struct session *ses, struct pppoe_packet *p);
+
+
+extern int add_client(char *addr);
+
+/* Make connections (including spawning pppd) as server/client */
+extern ppp_connect(struct session *ses);
+
+
+#endif
projects / ppp.git / blobdiff