X-Git-Url: http://git.sameswireless.fr/l2tpns.git/blobdiff_plain/32febcb0c7e6699472492c61cf315e362867f67a..514606fde085b91024ccd23e1cc30b7ef8ed55c6:/l2tpns.c?ds=inline diff --git a/l2tpns.c b/l2tpns.c index 189dceb..5a73fe5 100644 --- a/l2tpns.c +++ b/l2tpns.c @@ -4,7 +4,7 @@ // Copyright (c) 2002 FireBrick (Andrews & Arnold Ltd / Watchfront Ltd) - GPL licenced // vim: sw=8 ts=8 -char const *cvs_id_l2tpns = "$Id: l2tpns.c,v 1.23 2004/08/26 04:43:52 fred_nerk Exp $"; +char const *cvs_id_l2tpns = "$Id: l2tpns.c,v 1.45 2004/11/05 07:50:05 bodea Exp $"; #include #include @@ -23,6 +23,7 @@ char const *cvs_id_l2tpns = "$Id: l2tpns.c,v 1.23 2004/08/26 04:43:52 fred_nerk #include #include #include +#include #include #include #include @@ -63,7 +64,7 @@ u32 sessionid = 0; // session id for radius accounting int syslog_log = 0; // are we logging to syslog FILE *log_stream = NULL; // file handle for direct logging (i.e. direct into file, not via syslog). extern int cluster_sockfd; // Intra-cluster communications socket. -u32 last_sid = 0; // Last used PPP SID. Can I kill this?? -- mo +u32 last_id = 0; // Last used PPP SID. Can I kill this?? -- mo int clifd = 0; // Socket listening for CLI connections. struct cli_session_actions *cli_session_actions = NULL; // Pending session changes requested by CLI @@ -101,13 +102,15 @@ struct config_descriptt config_values[] = { CONFIG("save_state", save_state, BOOL), CONFIG("primary_radius", radiusserver[0], IP), CONFIG("secondary_radius", radiusserver[1], IP), - CONFIG("primary_radius_port",radiusport[0], SHORT), - CONFIG("secondary_radius_port",radiusport[1], SHORT), + CONFIG("primary_radius_port", radiusport[0], SHORT), + CONFIG("secondary_radius_port", radiusport[1], SHORT), CONFIG("radius_accounting", radius_accounting, BOOL), CONFIG("radius_secret", radiussecret, STRING), CONFIG("bind_address", bind_address, IP), + CONFIG("peer_address", peer_address, IP), CONFIG("send_garp", send_garp, BOOL), CONFIG("throttle_speed", rl_rate, UNSIGNED_LONG), + CONFIG("throttle_buckets", num_tbfs, INT), CONFIG("accounting_dir", accounting_dir, STRING), CONFIG("setuid", target_uid, INT), CONFIG("dump_speed", dump_speed, BOOL), @@ -169,6 +172,7 @@ void dump_state(); void tunnel_clean(); tunnelidt new_tunnel(); void update_config(); +int unhide_avp(u8 *avp, tunnelidt t, sessionidt s, u16 length); static void cache_ipmap(ipt ip, int s); static void uncache_ipmap(ipt ip); @@ -192,7 +196,7 @@ clockt backoff(u8 try) // -// Log a debug message. +// Log a debug message. Typically called vias LOG macro // void _log(int level, ipt address, sessionidt s, tunnelidt t, const char *format, ...) { @@ -237,17 +241,17 @@ void _log(int level, ipt address, sessionidt s, tunnelidt t, const char *format, va_end(ap); } -void _log_hex(int level, ipt address, sessionidt s, tunnelidt t, const char *title, const char *data, int maxsize) +void _log_hex(int level, const char *title, const char *data, int maxsize) { int i, j; const u8 *d = (const u8 *)data; if (config->debug < level) return; - // No support for log_hex to syslog + // No support for _log_hex to syslog if (log_stream) { - log(level, address, s, t, "%s (%d bytes):\n", title, maxsize); + _log(level, 0, 0, 0, "%s (%d bytes):\n", title, maxsize); setvbuf(log_stream, NULL, _IOFBF, 16384); for (i = 0; i < maxsize; ) @@ -320,14 +324,14 @@ void routeset(sessionidt s, ipt ip, ipt mask, ipt gw, u8 add) else if (mask == 0xffffffff) r.rt_flags |= RTF_HOST; - log(1, ip, 0, 0, "Route %s %u.%u.%u.%u/%u.%u.%u.%u %u.%u.%u.%u\n", + LOG(1, ip, 0, 0, "Route %s %u.%u.%u.%u/%u.%u.%u.%u %u.%u.%u.%u\n", add ? "add" : "del", ip >> 24, ip >> 16 & 0xff, ip >> 8 & 0xff, ip & 0xff, mask >> 24, mask >> 16 & 0xff, mask >> 8 & 0xff, mask & 0xff, gw >> 24, gw >> 16 & 0xff, gw >> 8 & 0xff, gw & 0xff); if (ioctl(ifrfd, add ? SIOCADDRT : SIOCDELRT, (void *) &r) < 0) - log(0, 0, 0, 0, "routeset() error in ioctl: %s\n", strerror(errno)); + LOG(0, 0, 0, 0, "routeset() error in ioctl: %s\n", strerror(errno)); #ifdef BGP if (add) @@ -366,7 +370,7 @@ void inittun(void) tunfd = open(TUNDEVICE, O_RDWR); if (tunfd < 0) { // fatal - log(0, 0, 0, 0, "Can't open %s: %s\n", TUNDEVICE, strerror(errno)); + LOG(0, 0, 0, 0, "Can't open %s: %s\n", TUNDEVICE, strerror(errno)); exit(1); } { @@ -375,7 +379,7 @@ void inittun(void) } if (ioctl(tunfd, TUNSETIFF, (void *) &ifr) < 0) { - log(0, 0, 0, 0, "Can't set tun interface: %s\n", strerror(errno)); + LOG(0, 0, 0, 0, "Can't set tun interface: %s\n", strerror(errno)); exit(1); } assert(strlen(ifr.ifr_name) < sizeof(config->tundevice)); @@ -388,25 +392,25 @@ void inittun(void) if (ioctl(ifrfd, SIOCSIFADDR, (void *) &ifr) < 0) { - log(0, 0, 0, 0, "Error setting tun address: %s\n", strerror(errno)); + LOG(0, 0, 0, 0, "Error setting tun address: %s\n", strerror(errno)); exit(1); } /* Bump up the qlen to deal with bursts from the network */ ifr.ifr_qlen = 1000; if (ioctl(ifrfd, SIOCSIFTXQLEN, (void *) &ifr) < 0) { - log(0, 0, 0, 0, "Error setting tun queue length: %s\n", strerror(errno)); + LOG(0, 0, 0, 0, "Error setting tun queue length: %s\n", strerror(errno)); exit(1); } ifr.ifr_flags = IFF_UP; if (ioctl(ifrfd, SIOCSIFFLAGS, (void *) &ifr) < 0) { - log(0, 0, 0, 0, "Error setting tun flags: %s\n", strerror(errno)); + LOG(0, 0, 0, 0, "Error setting tun flags: %s\n", strerror(errno)); exit(1); } if (ioctl(ifrfd, SIOCGIFINDEX, (void *) &ifr) < 0) { - log(0, 0, 0, 0, "Error setting tun ifindex: %s\n", strerror(errno)); + LOG(0, 0, 0, 0, "Error setting tun ifindex: %s\n", strerror(errno)); exit(1); } tunidx = ifr.ifr_ifindex; @@ -431,7 +435,7 @@ void initudp(void) } if (bind(udpfd, (void *) &addr, sizeof(addr)) < 0) { - log(0, 0, 0, 0, "Error in UDP bind: %s\n", strerror(errno)); + LOG(0, 0, 0, 0, "Error in UDP bind: %s\n", strerror(errno)); exit(1); } snoopfd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP); @@ -444,7 +448,7 @@ void initudp(void) setsockopt(controlfd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)); if (bind(controlfd, (void *) &addr, sizeof(addr)) < 0) { - log(0, 0, 0, 0, "Error in control bind: %s\n", strerror(errno)); + LOG(0, 0, 0, 0, "Error in control bind: %s\n", strerror(errno)); exit(1); } } @@ -515,9 +519,9 @@ static void cache_ipmap(ipt ip, int s) d[(size_t) a[3]] = (char *)((int)s); if (s > 0) - log(4, ip, s, session[s].tunnel, "Caching ip address %s\n", inet_toa(nip)); + LOG(4, ip, s, session[s].tunnel, "Caching ip address %s\n", inet_toa(nip)); else if (s == 0) - log(4, ip, 0, 0, "Un-caching ip address %s\n", inet_toa(nip)); + LOG(4, ip, 0, 0, "Un-caching ip address %s\n", inet_toa(nip)); // else a map to an ip pool index. } @@ -602,21 +606,21 @@ void send_garp(ipt ip) s = socket(PF_INET, SOCK_DGRAM, 0); if (s < 0) { - log(0, 0, 0, 0, "Error creating socket for GARP: %s\n", strerror(errno)); + LOG(0, 0, 0, 0, "Error creating socket for GARP: %s\n", strerror(errno)); return; } memset(&ifr, 0, sizeof(ifr)); strncpy(ifr.ifr_name, "eth0", sizeof(ifr.ifr_name) - 1); if (ioctl(s, SIOCGIFHWADDR, &ifr) < 0) { - log(0, 0, 0, 0, "Error getting eth0 hardware address for GARP: %s\n", strerror(errno)); + LOG(0, 0, 0, 0, "Error getting eth0 hardware address for GARP: %s\n", strerror(errno)); close(s); return; } memcpy(mac, &ifr.ifr_hwaddr.sa_data, 6*sizeof(char)); if (ioctl(s, SIOCGIFINDEX, &ifr) < 0) { - log(0, 0, 0, 0, "Error getting eth0 interface index for GARP: %s\n", strerror(errno)); + LOG(0, 0, 0, 0, "Error getting eth0 interface index for GARP: %s\n", strerror(errno)); close(s); return; } @@ -648,7 +652,7 @@ void tunnelsend(u8 * buf, u16 l, tunnelidt t) if (!t) { static int backtrace_count = 0; - log(0, 0, 0, t, "tunnelsend called with 0 as tunnel id\n"); + LOG(0, 0, 0, t, "tunnelsend called with 0 as tunnel id\n"); STAT(tunnel_tx_errors); log_backtrace(backtrace_count, 5) return; @@ -657,7 +661,7 @@ void tunnelsend(u8 * buf, u16 l, tunnelidt t) if (!tunnel[t].ip) { static int backtrace_count = 0; - log(1, 0, 0, t, "Error sending data out tunnel: no remote endpoint (tunnel not set up)\n"); + LOG(1, 0, 0, t, "Error sending data out tunnel: no remote endpoint (tunnel not set up)\n"); log_backtrace(backtrace_count, 5) STAT(tunnel_tx_errors); return; @@ -678,19 +682,19 @@ void tunnelsend(u8 * buf, u16 l, tunnelidt t) if (tunnel[t].try > 1) { STAT(tunnel_retries); - log(3, tunnel[t].ip, 0, t, "Control message resend try %d\n", tunnel[t].try); + LOG(3, tunnel[t].ip, 0, t, "Control message resend try %d\n", tunnel[t].try); } } if (sendto(udpfd, buf, l, 0, (void *) &addr, sizeof(addr)) < 0) { - log(0, tunnel[t].ip, ntohs((*(u16 *) (buf + 6))), t, "Error sending data out tunnel: %s (udpfd=%d, buf=%p, len=%d, dest=%s)\n", + LOG(0, tunnel[t].ip, ntohs((*(u16 *) (buf + 6))), t, "Error sending data out tunnel: %s (udpfd=%d, buf=%p, len=%d, dest=%s)\n", strerror(errno), udpfd, buf, l, inet_ntoa(addr.sin_addr)); STAT(tunnel_tx_errors); return; } - log_hex(5, "Send Tunnel Data", buf, l); + LOG_HEX(5, "Send Tunnel Data", buf, l); STAT(tunnel_tx_packets); INC_STAT(tunnel_tx_bytes, l); } @@ -722,13 +726,13 @@ void processipout(u8 * buf, int len) if (len < MIN_IP_SIZE) { - log(1, 0, 0, 0, "Short IP, %d bytes\n", len); + LOG(1, 0, 0, 0, "Short IP, %d bytes\n", len); STAT(tunnel_tx_errors); return; } if (len >= MAXETHER) { - log(1, 0, 0, 0, "Oversize IP packet %d bytes\n", len); + LOG(1, 0, 0, 0, "Oversize IP packet %d bytes\n", len); STAT(tunnel_tx_errors); return; } @@ -740,7 +744,7 @@ void processipout(u8 * buf, int len) // Got an IP header now if (*(u8 *)(buf) >> 4 != 4) { - log(1, 0, 0, 0, "IP: Don't understand anything except IPv4\n"); + LOG(1, 0, 0, 0, "IP: Don't understand anything except IPv4\n"); return; } @@ -759,7 +763,7 @@ void processipout(u8 * buf, int len) if (rate++ < config->icmp_rate) // Only send a max of icmp_rate per second. { - log(4, 0, 0, 0, "IP: Sending ICMP host unreachable to %s\n", inet_toa(*(u32 *)(buf + 12))); + LOG(4, 0, 0, 0, "IP: Sending ICMP host unreachable to %s\n", inet_toa(*(u32 *)(buf + 12))); host_unreachable(*(u32 *)(buf + 12), *(u16 *)(buf + 4), ip, buf, (len < 64) ? 64 : len); } return; @@ -787,14 +791,14 @@ void processipout(u8 * buf, int len) if (sp->snoop_ip && sp->snoop_port) snoop_send_packet(buf, len, sp->snoop_ip, sp->snoop_port); - log(5, session[s].ip, s, t, "Ethernet -> Tunnel (%d bytes)\n", len); + LOG(5, session[s].ip, s, t, "Ethernet -> Tunnel (%d bytes)\n", len); // Add on L2TP header { u8 *p = makeppp(b, sizeof(b), buf, len, t, s, PPPIP); if (!p) { - log(3, session[s].ip, s, t, "failed to send packet in processipout.\n"); + LOG(3, session[s].ip, s, t, "failed to send packet in processipout.\n"); return; } tunnelsend(b, len + (p-b), t); // send it... @@ -821,7 +825,7 @@ void send_ipout(sessionidt s, u8 *buf, int len) if (len < 0 || len > MAXETHER) { - log(1,0,0,0, "Odd size IP packet: %d bytes\n", len); + LOG(1,0,0,0, "Odd size IP packet: %d bytes\n", len); return; } @@ -836,7 +840,7 @@ void send_ipout(sessionidt s, u8 *buf, int len) t = session[s].tunnel; sp = &session[s]; - log(5, session[s].ip, s, t, "Ethernet -> Tunnel (%d bytes)\n", len); + LOG(5, session[s].ip, s, t, "Ethernet -> Tunnel (%d bytes)\n", len); // Snooping this session. if (sp->snoop_ip && sp->snoop_port) @@ -847,7 +851,7 @@ void send_ipout(sessionidt s, u8 *buf, int len) u8 *p = makeppp(b, sizeof(b), buf, len, t, s, PPPIP); if (!p) { - log(3, session[s].ip, s, t, "failed to send packet in send_ipout.\n"); + LOG(3, session[s].ip, s, t, "failed to send packet in send_ipout.\n"); return; } tunnelsend(b, len + (p-b), t); // send it... @@ -965,62 +969,48 @@ void controladd(controlt * c, tunnelidt t, sessionidt s) // // Throttle or Unthrottle a session // -// Throttle the data folling through a session -// to be no more than 'throttle' kbit/sec each way. +// Throttle the data from/to through a session to no more than +// 'rate_in' kbit/sec in (from user) or 'rate_out' kbit/sec out (to +// user). // -int throttle_session(sessionidt s, int throttle) +// If either value is -1, the current value is retained for that +// direction. +// +void throttle_session(sessionidt s, int rate_in, int rate_out) { if (!session[s].tunnel) - return 0; // No-one home. + return; // No-one home. if (!*session[s].user) - return 0; // User not logged in + return; // User not logged in - if (throttle) + if (rate_in >= 0) { - if (session[s].tbf_in || session[s].tbf_out) - { - if (throttle == session[s].throttle) - return 1; - - // Currently throttled but the rate is changing. - + int bytes = rate_in * 1024 / 8; // kbits to bytes + if (session[s].tbf_in) free_tbf(session[s].tbf_in); - free_tbf(session[s].tbf_out); - } - - session[s].tbf_in = new_tbf(s, throttle*1024/4, throttle*1024/8, send_ipin); - session[s].tbf_out = new_tbf(s, throttle*1024/4, throttle*1024/8, send_ipout); - if (throttle != session[s].throttle) - { - // Changed. Flood to slaves. - session[s].throttle = throttle; - cluster_send_session(s); - } + if (rate_in > 0) + session[s].tbf_in = new_tbf(s, bytes * 2, bytes, send_ipin); + else + session[s].tbf_in = 0; - return 1; + session[s].throttle_in = rate_in; } - // else Unthrottling. - - if (!session[s].tbf_in && !session[s].tbf_out && !session[s].throttle) - return 0; - - free_tbf(session[s].tbf_in); - session[s].tbf_in = 0; + if (rate_out >= 0) + { + int bytes = rate_out * 1024 / 8; + if (session[s].tbf_out) + free_tbf(session[s].tbf_out); - free_tbf(session[s].tbf_out); - session[s].tbf_out = 0; + if (rate_out > 0) + session[s].tbf_out = new_tbf(s, bytes * 2, bytes, send_ipout); + else + session[s].tbf_out = 0; - if (throttle != session[s].throttle) - { - // Changed. Flood to slaves. - session[s].throttle = throttle; - cluster_send_session(s); + session[s].throttle_out = rate_out; } - - return 0; } // start tidy shutdown of session @@ -1034,12 +1024,12 @@ void sessionshutdown(sessionidt s, char *reason) if (!session[s].tunnel) { - log(3, session[s].ip, s, session[s].tunnel, "Called sessionshutdown on a session with no tunnel.\n"); + LOG(3, session[s].ip, s, session[s].tunnel, "Called sessionshutdown on a session with no tunnel.\n"); return; // not a live session } if (!dead) - log(2, 0, s, session[s].tunnel, "Shutting down session %d: %s\n", s, reason); + LOG(2, 0, s, session[s].tunnel, "Shutting down session %d: %s\n", s, reason); session[s].die = now() + 150; // Clean up in 15 seconds @@ -1056,7 +1046,7 @@ void sessionshutdown(sessionidt s, char *reason) { if (!(r = radiusnew(s))) { - log(1, 0, s, session[s].tunnel, "No free RADIUS sessions for Stop message\n"); + LOG(1, 0, s, session[s].tunnel, "No free RADIUS sessions for Stop message\n"); STAT(radius_overflow); } else @@ -1086,16 +1076,18 @@ void sessionshutdown(sessionidt s, char *reason) } else free_ip_address(s); - - if (session[s].throttle) // Unthrottle if throttled. - throttle_session(s, 0); } + + if (session[s].throttle_in || session[s].throttle_out) // Unthrottle if throttled. + throttle_session(s, 0, 0); + { // Send CDN controlt *c = controlnew(14); // sending CDN control16(c, 1, 3, 1); // result code (admin reasons - TBA make error, general error, add message control16(c, 14, s, 1); // assigned session (our end) controladd(c, session[s].tunnel, s); // send the message } + cluster_send_session(s); } @@ -1127,7 +1119,7 @@ void sendipcp(tunnelidt t, sessionidt s) q = makeppp(buf,sizeof(buf), 0, 0, t, s, PPPIPCP); if (!q) { - log(3, session[s].ip, s, t, "failed to send packet in sendipcp.\n"); + LOG(3, session[s].ip, s, t, "failed to send packet in sendipcp.\n"); return; } @@ -1136,7 +1128,10 @@ void sendipcp(tunnelidt t, sessionidt s) *(u16 *) (q + 2) = htons(10); q[4] = 3; q[5] = 6; - *(u32 *) (q + 6) = config->bind_address ? config->bind_address : my_address; // send my IP + *(u32 *) (q + 6) = config->peer_address ? config->peer_address : + config->bind_address ? config->bind_address : + my_address; // send my IP + tunnelsend(buf, 10 + (q - buf), t); // send it session[s].flags &= ~SF_IPCP_ACKED; // Clear flag. } @@ -1152,9 +1147,7 @@ void sessionkill(sessionidt s, char *reason) if (session[s].radius) radiusclear(session[s].radius, s); // cant send clean accounting data, session is killed - log(2, 0, s, session[s].tunnel, "Kill session %d (%s): %s\n", s, session[s].user, reason); - - throttle_session(s, 0); // Force session to be un-throttle. Free'ing TBF structures. + LOG(2, 0, s, session[s].tunnel, "Kill session %d (%s): %s\n", s, session[s].user, reason); memset(&session[s], 0, sizeof(session[s])); session[s].tunnel = T_FREE; // Mark it as free. @@ -1190,7 +1183,7 @@ void tunnelkill(tunnelidt t, char *reason) // free tunnel tunnelclear(t); - log(1, 0, 0, t, "Kill tunnel %d: %s\n", t, reason); + LOG(1, 0, 0, t, "Kill tunnel %d: %s\n", t, reason); cli_tunnel_actions[s].action = 0; cluster_send_tunnel(t); } @@ -1208,7 +1201,7 @@ void tunnelshutdown(tunnelidt t, char *reason) tunnelkill(t, reason); return; } - log(1, 0, 0, t, "Shutting down tunnel %d (%s)\n", t, reason); + LOG(1, 0, 0, t, "Shutting down tunnel %d (%s)\n", t, reason); // close session for (s = 1; s < MAXSESSION; s++) @@ -1239,18 +1232,18 @@ void processudp(u8 * buf, int len, struct sockaddr_in *addr) udp_rx += len; udp_rx_pkt++; - log_hex(5, "UDP Data", buf, len); + LOG_HEX(5, "UDP Data", buf, len); STAT(tunnel_rx_packets); INC_STAT(tunnel_rx_bytes, len); if (len < 6) { - log(1, ntohl(addr->sin_addr.s_addr), 0, 0, "Short UDP, %d bytes\n", len); + LOG(1, ntohl(addr->sin_addr.s_addr), 0, 0, "Short UDP, %d bytes\n", len); STAT(tunnel_rx_errors); return; } if ((buf[1] & 0x0F) != 2) { - log(1, ntohl(addr->sin_addr.s_addr), 0, 0, "Bad L2TP ver %d\n", (buf[1] & 0x0F) != 2); + LOG(1, ntohl(addr->sin_addr.s_addr), 0, 0, "Bad L2TP ver %d\n", (buf[1] & 0x0F) != 2); STAT(tunnel_rx_errors); return; } @@ -1265,13 +1258,13 @@ void processudp(u8 * buf, int len, struct sockaddr_in *addr) p += 2; if (s >= MAXSESSION) { - log(1, ntohl(addr->sin_addr.s_addr), s, t, "Received UDP packet with invalid session ID\n"); + LOG(1, ntohl(addr->sin_addr.s_addr), s, t, "Received UDP packet with invalid session ID\n"); STAT(tunnel_rx_errors); return; } if (t >= MAXTUNNEL) { - log(1, ntohl(addr->sin_addr.s_addr), s, t, "Received UDP packet with invalid tunnel ID\n"); + LOG(1, ntohl(addr->sin_addr.s_addr), s, t, "Received UDP packet with invalid tunnel ID\n"); STAT(tunnel_rx_errors); return; } @@ -1289,7 +1282,7 @@ void processudp(u8 * buf, int len, struct sockaddr_in *addr) } if ((p - buf) > l) { - log(1, ntohl(addr->sin_addr.s_addr), s, t, "Bad length %d>%d\n", (p - buf), l); + LOG(1, ntohl(addr->sin_addr.s_addr), s, t, "Bad length %d>%d\n", (p - buf), l); STAT(tunnel_rx_errors); return; } @@ -1316,11 +1309,11 @@ void processudp(u8 * buf, int len, struct sockaddr_in *addr) if ((*buf & 0xCA) != 0xC8) { - log(1, ntohl(addr->sin_addr.s_addr), s, t, "Bad control header %02X\n", *buf); + LOG(1, ntohl(addr->sin_addr.s_addr), s, t, "Bad control header %02X\n", *buf); STAT(tunnel_rx_errors); return; } - log(3, ntohl(addr->sin_addr.s_addr), s, t, "Control message (%d bytes): (unacked %d) l-ns %d l-nr %d r-ns %d r-nr %d\n", + LOG(3, ntohl(addr->sin_addr.s_addr), s, t, "Control message (%d bytes): (unacked %d) l-ns %d l-nr %d r-ns %d r-nr %d\n", l, tunnel[t].controlc, tunnel[t].ns, tunnel[t].nr, ns, nr); // if no tunnel specified, assign one if (!t) @@ -1345,7 +1338,7 @@ void processudp(u8 * buf, int len, struct sockaddr_in *addr) { if (!(t = new_tunnel())) { - log(1, ntohl(addr->sin_addr.s_addr), 0, 0, "No more tunnels\n"); + LOG(1, ntohl(addr->sin_addr.s_addr), 0, 0, "No more tunnels\n"); STAT(tunnel_overflow); return; } @@ -1353,7 +1346,7 @@ void processudp(u8 * buf, int len, struct sockaddr_in *addr) tunnel[t].ip = ntohl(*(ipt *) & addr->sin_addr); tunnel[t].port = ntohs(addr->sin_port); tunnel[t].window = 4; // default window - log(1, ntohl(addr->sin_addr.s_addr), 0, t, " New tunnel from %u.%u.%u.%u/%u ID %d\n", tunnel[t].ip >> 24, tunnel[t].ip >> 16 & 255, tunnel[t].ip >> 8 & 255, tunnel[t].ip & 255, tunnel[t].port, t); + LOG(1, ntohl(addr->sin_addr.s_addr), 0, t, " New tunnel from %u.%u.%u.%u/%u ID %d\n", tunnel[t].ip >> 24, tunnel[t].ip >> 16 & 255, tunnel[t].ip >> 8 & 255, tunnel[t].ip & 255, tunnel[t].port, t); STAT(tunnel_created); } @@ -1384,7 +1377,7 @@ void processudp(u8 * buf, int len, struct sockaddr_in *addr) if (ns != tunnel[t].nr) { // is this the sequence we were expecting? - log(1, ntohl(addr->sin_addr.s_addr), 0, t, " Out of sequence tunnel %d, (%d is not the expected %d)\n", t, ns, tunnel[t].nr); + LOG(1, ntohl(addr->sin_addr.s_addr), 0, t, " Out of sequence tunnel %d, (%d is not the expected %d)\n", t, ns, tunnel[t].nr); STAT(tunnel_rx_errors); if (l) // Is this not a ZLB? @@ -1427,7 +1420,7 @@ void processudp(u8 * buf, int len, struct sockaddr_in *addr) p += n; // next if (l < n) { - log(1, ntohl(addr->sin_addr.s_addr), s, t, "Invalid length in AVP\n"); + LOG(1, ntohl(addr->sin_addr.s_addr), s, t, "Invalid length in AVP\n"); STAT(tunnel_rx_errors); fatal = flags; return; @@ -1438,28 +1431,35 @@ void processudp(u8 * buf, int len, struct sockaddr_in *addr) // handle hidden AVPs if (!*config->l2tpsecret) { - log(1, ntohl(addr->sin_addr.s_addr), s, t, "Hidden AVP requested, but no L2TP secret.\n"); + LOG(1, ntohl(addr->sin_addr.s_addr), s, t, "Hidden AVP requested, but no L2TP secret.\n"); fatal = flags; continue; } if (!session[s].random_vector_length) { - log(1, ntohl(addr->sin_addr.s_addr), s, t, "Hidden AVP requested, but no random vector.\n"); + LOG(1, ntohl(addr->sin_addr.s_addr), s, t, "Hidden AVP requested, but no random vector.\n"); + fatal = flags; + continue; + } + LOG(4, ntohl(addr->sin_addr.s_addr), s, t, "Hidden AVP\n"); + // Unhide the AVP + n = unhide_avp(b, t, s, n); + if (n == 0) + { fatal = flags; continue; } - log(4, ntohl(addr->sin_addr.s_addr), s, t, "Hidden AVP\n"); } if (*b & 0x3C) { - log(1, ntohl(addr->sin_addr.s_addr), s, t, "Unrecognised AVP flags %02X\n", *b); + LOG(1, ntohl(addr->sin_addr.s_addr), s, t, "Unrecognised AVP flags %02X\n", *b); fatal = flags; continue; // next } b += 2; if (*(u16 *) (b)) { - log(2, ntohl(addr->sin_addr.s_addr), s, t, "Unknown AVP vendor %d\n", ntohs(*(u16 *) (b))); + LOG(2, ntohl(addr->sin_addr.s_addr), s, t, "Unknown AVP vendor %d\n", ntohs(*(u16 *) (b))); fatal = flags; continue; // next } @@ -1468,12 +1468,12 @@ void processudp(u8 * buf, int len, struct sockaddr_in *addr) b += 2; n -= 6; - log(4, ntohl(addr->sin_addr.s_addr), s, t, " AVP %d (%s) len %d\n", mtype, avpnames[mtype], n); + LOG(4, ntohl(addr->sin_addr.s_addr), s, t, " AVP %d (%s) len %d\n", mtype, avpnames[mtype], n); switch (mtype) { case 0: // message type message = ntohs(*(u16 *) b); - log(4, ntohl(addr->sin_addr.s_addr), s, t, " Message type = %d (%s)\n", *b, + LOG(4, ntohl(addr->sin_addr.s_addr), s, t, " Message type = %d (%s)\n", *b, l2tp_message_types[message]); mandatorymessage = flags; break; @@ -1492,7 +1492,7 @@ void processudp(u8 * buf, int len, struct sockaddr_in *addr) resdesc = cdn_result_codes[rescode]; } - log(4, ntohl(addr->sin_addr.s_addr), s, t, " Result Code %d: %s\n", + LOG(4, ntohl(addr->sin_addr.s_addr), s, t, " Result Code %d: %s\n", rescode, resdesc); if (n >= 4) { @@ -1500,11 +1500,11 @@ void processudp(u8 * buf, int len, struct sockaddr_in *addr) const char* errdesc = "(unknown)"; if (errcode <= MAX_ERROR_CODE) errdesc = error_codes[errcode]; - log(4, ntohl(addr->sin_addr.s_addr), s, t, " Error Code %d: %s\n", + LOG(4, ntohl(addr->sin_addr.s_addr), s, t, " Error Code %d: %s\n", errcode, errdesc); } if (n > 4) - log(4, ntohl(addr->sin_addr.s_addr), s, t, " Error String: %.*s\n", + LOG(4, ntohl(addr->sin_addr.s_addr), s, t, " Error String: %.*s\n", n-4, b+4); break; @@ -1513,10 +1513,10 @@ void processudp(u8 * buf, int len, struct sockaddr_in *addr) case 2: // protocol version { version = ntohs(*(u16 *) (b)); - log(4, ntohl(addr->sin_addr.s_addr), s, t, " Protocol version = %d\n", version); + LOG(4, ntohl(addr->sin_addr.s_addr), s, t, " Protocol version = %d\n", version); if (version && version != 0x0100) { // allow 0.0 and 1.0 - log(1, ntohl(addr->sin_addr.s_addr), s, t, " Bad protocol version %04X\n", + LOG(1, ntohl(addr->sin_addr.s_addr), s, t, " Bad protocol version %04X\n", version); fatal = flags; continue; // next @@ -1524,69 +1524,74 @@ void processudp(u8 * buf, int len, struct sockaddr_in *addr) } break; case 3: // framing capabilities -// log(4, ntohl(addr->sin_addr.s_addr), s, t, "Framing capabilities\n"); +// LOG(4, ntohl(addr->sin_addr.s_addr), s, t, "Framing capabilities\n"); break; case 4: // bearer capabilities -// log(4, ntohl(addr->sin_addr.s_addr), s, t, "Bearer capabilities\n"); +// LOG(4, ntohl(addr->sin_addr.s_addr), s, t, "Bearer capabilities\n"); break; case 5: // tie breaker // We never open tunnels, so we don't care about tie breakers -// log(4, ntohl(addr->sin_addr.s_addr), s, t, "Tie breaker\n"); +// LOG(4, ntohl(addr->sin_addr.s_addr), s, t, "Tie breaker\n"); continue; case 6: // firmware revision -// log(4, ntohl(addr->sin_addr.s_addr), s, t, "Firmware revision\n"); +// LOG(4, ntohl(addr->sin_addr.s_addr), s, t, "Firmware revision\n"); break; case 7: // host name memset(tunnel[t].hostname, 0, 128); memcpy(tunnel[t].hostname, b, (n >= 127) ? 127 : n); - log(4, ntohl(addr->sin_addr.s_addr), s, t, " Tunnel hostname = \"%s\"\n", tunnel[t].hostname); + LOG(4, ntohl(addr->sin_addr.s_addr), s, t, " Tunnel hostname = \"%s\"\n", tunnel[t].hostname); // TBA - to send to RADIUS break; case 8: // vendor name memset(tunnel[t].vendor, 0, sizeof(tunnel[t].vendor)); memcpy(tunnel[t].vendor, b, (n >= sizeof(tunnel[t].vendor) - 1) ? sizeof(tunnel[t].vendor) - 1 : n); - log(4, ntohl(addr->sin_addr.s_addr), s, t, " Vendor name = \"%s\"\n", tunnel[t].vendor); + LOG(4, ntohl(addr->sin_addr.s_addr), s, t, " Vendor name = \"%s\"\n", tunnel[t].vendor); break; case 9: // assigned tunnel tunnel[t].far = ntohs(*(u16 *) (b)); - log(4, ntohl(addr->sin_addr.s_addr), s, t, " Remote tunnel id = %d\n", tunnel[t].far); + LOG(4, ntohl(addr->sin_addr.s_addr), s, t, " Remote tunnel id = %d\n", tunnel[t].far); break; case 10: // rx window tunnel[t].window = ntohs(*(u16 *) (b)); if (!tunnel[t].window) tunnel[t].window = 1; // window of 0 is silly - log(4, ntohl(addr->sin_addr.s_addr), s, t, " rx window = %d\n", tunnel[t].window); + LOG(4, ntohl(addr->sin_addr.s_addr), s, t, " rx window = %d\n", tunnel[t].window); break; case 11: // Challenge { - log(4, ntohl(addr->sin_addr.s_addr), s, t, " LAC requested CHAP authentication for tunnel\n"); + LOG(4, ntohl(addr->sin_addr.s_addr), s, t, " LAC requested CHAP authentication for tunnel\n"); build_chap_response(b, 2, n, &chapresponse); } break; + case 13: // Response + // Why did they send a response? We never challenge. + LOG(2, ntohl(addr->sin_addr.s_addr), s, t, " received unexpected challenge response\n"); + break; + case 14: // assigned session asession = session[s].far = ntohs(*(u16 *) (b)); - log(4, ntohl(addr->sin_addr.s_addr), s, t, " assigned session = %d\n", asession); + LOG(4, ntohl(addr->sin_addr.s_addr), s, t, " assigned session = %d\n", asession); break; case 15: // call serial number - log(4, ntohl(addr->sin_addr.s_addr), s, t, " call serial number = %d\n", ntohl(*(u32 *)b)); + LOG(4, ntohl(addr->sin_addr.s_addr), s, t, " call serial number = %d\n", ntohl(*(u32 *)b)); break; case 18: // bearer type - log(4, ntohl(addr->sin_addr.s_addr), s, t, " bearer type = %d\n", ntohl(*(u32 *)b)); + LOG(4, ntohl(addr->sin_addr.s_addr), s, t, " bearer type = %d\n", ntohl(*(u32 *)b)); // TBA - for RADIUS break; case 19: // framing type - log(4, ntohl(addr->sin_addr.s_addr), s, t, " framing type = %d\n", ntohl(*(u32 *)b)); + LOG(4, ntohl(addr->sin_addr.s_addr), s, t, " framing type = %d\n", ntohl(*(u32 *)b)); // TBA break; case 21: // called number memset(called, 0, MAXTEL); memcpy(called, b, (n >= MAXTEL) ? (MAXTEL-1) : n); - log(4, ntohl(addr->sin_addr.s_addr), s, t, " Called <%s>\n", called); + LOG(4, ntohl(addr->sin_addr.s_addr), s, t, " Called <%s>\n", called); break; case 22: // calling number memset(calling, 0, MAXTEL); memcpy(calling, b, (n >= MAXTEL) ? (MAXTEL-1) : n); - log(4, ntohl(addr->sin_addr.s_addr), s, t, " Calling <%s>\n", calling); + LOG(4, ntohl(addr->sin_addr.s_addr), s, t, " Calling <%s>\n", calling); break; case 23: // subtype break; @@ -1602,7 +1607,7 @@ void processudp(u8 * buf, int len, struct sockaddr_in *addr) memcpy(tmp, b, (n >= 30) ? 30 : n); session[s].tx_connect_speed = atol(tmp); } - log(4, ntohl(addr->sin_addr.s_addr), s, t, " TX connect speed <%u>\n", + LOG(4, ntohl(addr->sin_addr.s_addr), s, t, " TX connect speed <%u>\n", session[s].tx_connect_speed); break; case 38: // rx connect speed @@ -1617,19 +1622,19 @@ void processudp(u8 * buf, int len, struct sockaddr_in *addr) memcpy(tmp, b, (n >= 30) ? 30 : n); session[s].rx_connect_speed = atol(tmp); } - log(4, ntohl(addr->sin_addr.s_addr), s, t, " RX connect speed <%u>\n", + LOG(4, ntohl(addr->sin_addr.s_addr), s, t, " RX connect speed <%u>\n", session[s].rx_connect_speed); break; case 25: // Physical Channel ID { u32 tmp = ntohl(*(u32 *)b); - log(4, ntohl(addr->sin_addr.s_addr), s, t, " Physical Channel ID <%X>\n", tmp); + LOG(4, ntohl(addr->sin_addr.s_addr), s, t, " Physical Channel ID <%X>\n", tmp); break; } case 29: // Proxy Authentication Type { u16 authtype = ntohs(*(u16 *)b); - log(4, ntohl(addr->sin_addr.s_addr), s, t, " Proxy Auth Type %d (%s)\n", + LOG(4, ntohl(addr->sin_addr.s_addr), s, t, " Proxy Auth Type %d (%s)\n", authtype, authtypes[authtype]); requestchap = (authtype == 2); break; @@ -1638,20 +1643,20 @@ void processudp(u8 * buf, int len, struct sockaddr_in *addr) { char authname[64] = {0}; memcpy(authname, b, (n > 63) ? 63 : n); - log(4, ntohl(addr->sin_addr.s_addr), s, t, " Proxy Auth Name (%s)\n", + LOG(4, ntohl(addr->sin_addr.s_addr), s, t, " Proxy Auth Name (%s)\n", authname); break; } case 31: // Proxy Authentication Challenge { memcpy(radius[session[s].radius].auth, b, 16); - log(4, ntohl(addr->sin_addr.s_addr), s, t, " Proxy Auth Challenge\n"); + LOG(4, ntohl(addr->sin_addr.s_addr), s, t, " Proxy Auth Challenge\n"); break; } case 32: // Proxy Authentication ID { u16 authid = ntohs(*(u16 *)(b)); - log(4, ntohl(addr->sin_addr.s_addr), s, t, " Proxy Auth ID (%d)\n", + LOG(4, ntohl(addr->sin_addr.s_addr), s, t, " Proxy Auth ID (%d)\n", authid); if (session[s].radius) radius[session[s].radius].id = authid; @@ -1661,56 +1666,40 @@ void processudp(u8 * buf, int len, struct sockaddr_in *addr) { char authresp[64] = {0}; memcpy(authresp, b, (n > 63) ? 63 : n); - log(4, ntohl(addr->sin_addr.s_addr), s, t, " Proxy Auth Response\n"); + LOG(4, ntohl(addr->sin_addr.s_addr), s, t, " Proxy Auth Response\n"); break; } case 27: // last send lcp { // find magic number u8 *p = b, *e = p + n; - while (p < e && p[1]) + while (p + 1 < e && p[1] && p + p[1] <= e) { - if (*p == 5 && p[1] == 6) + if (*p == 5 && p[1] == 6) // Magic-Number amagic = ntohl(*(u32 *) (p + 2)); - else if (*p == 3 && p[1] == 5 && *(u16 *) (p + 2) == htons(PPPCHAP) && p[4] == 5) + else if (*p == 3 && p[1] == 5 && *(u16 *) (p + 2) == htons(PPPCHAP) && p[4] == 5) // Authentication-Protocol chap = 1; - else if (*p == 7) + else if (*p == 7) // Protocol-Field-Compression aflags |= SESSIONPFC; - else if (*p == 8) + else if (*p == 8) // Address-and-Control-Field-Compression aflags |= SESSIONACFC; p += p[1]; } - - { - char tmp[500] = {0}; - tmp[0] = ConfigReq; - memcpy((tmp + 1), b, n); - } } break; case 28: // last recv lcp confreq - { - char tmp[500] = {0}; - tmp[0] = ConfigReq; - memcpy((tmp + 1), b, n); - break; - } + break; case 26: // Initial Received LCP CONFREQ - { - char tmp[500] = {0}; - tmp[0] = ConfigReq; - memcpy((tmp + 1), b, n); - } break; case 39: // seq required - we control it as an LNS anyway... break; case 36: // Random Vector - log(4, ntohl(addr->sin_addr.s_addr), s, t, " Random Vector received. Enabled AVP Hiding.\n"); + LOG(4, ntohl(addr->sin_addr.s_addr), s, t, " Random Vector received. Enabled AVP Hiding.\n"); memset(session[s].random_vector, 0, sizeof(session[s].random_vector)); memcpy(session[s].random_vector, b, n); session[s].random_vector_length = n; break; default: - log(2, ntohl(addr->sin_addr.s_addr), s, t, " Unknown AVP type %d\n", mtype); + LOG(2, ntohl(addr->sin_addr.s_addr), s, t, " Unknown AVP type %d\n", mtype); fatal = flags; continue; // next } @@ -1778,7 +1767,7 @@ void processudp(u8 * buf, int len, struct sockaddr_in *addr) // make a RADIUS session if (!(r = radiusnew(s))) { - log(1, ntohl(addr->sin_addr.s_addr), s, t, "No free RADIUS sessions for ICRQ\n"); + LOG(1, ntohl(addr->sin_addr.s_addr), s, t, "No free RADIUS sessions for ICRQ\n"); sessionkill(s, "no free RADIUS sesions"); return; } @@ -1789,7 +1778,7 @@ void processudp(u8 * buf, int len, struct sockaddr_in *addr) session[s].tunnel = t; session[s].far = asession; session[s].last_packet = time_now; - log(3, ntohl(addr->sin_addr.s_addr), s, t, "New session (%d/%d)\n", tunnel[t].far, session[s].far); + LOG(3, ntohl(addr->sin_addr.s_addr), s, t, "New session (%d/%d)\n", tunnel[t].far, session[s].far); control16(c, 14, s, 1); // assigned session controladd(c, t, s); // send the reply { @@ -1808,10 +1797,10 @@ void processudp(u8 * buf, int len, struct sockaddr_in *addr) // TBA break; case 12: // ICCN - if ( amagic == 0) amagic = time_now; + if (amagic == 0) amagic = time_now; session[s].magic = amagic; // set magic number session[s].l2tp_flags = aflags; // set flags received - log(3, ntohl(addr->sin_addr.s_addr), s, t, "Magic %X Flags %X\n", amagic, aflags); + LOG(3, ntohl(addr->sin_addr.s_addr), s, t, "Magic %X Flags %X\n", amagic, aflags); controlnull(t); // ack // In CHAP state, request PAP instead if (requestchap) @@ -1822,14 +1811,14 @@ void processudp(u8 * buf, int len, struct sockaddr_in *addr) sessionshutdown(s, "Closed (Received CDN)"); break; case 0xFFFF: - log(1, ntohl(addr->sin_addr.s_addr), s, t, "Missing message type\n"); + LOG(1, ntohl(addr->sin_addr.s_addr), s, t, "Missing message type\n"); break; default: STAT(tunnel_rx_errors); if (mandatorymessage & 0x80) tunnelshutdown(t, "Unknown message"); else - log(1, ntohl(addr->sin_addr.s_addr), s, t, "Unknown message type %d\n", message); + LOG(1, ntohl(addr->sin_addr.s_addr), s, t, "Unknown message type %d\n", message); break; } if (chapresponse) free(chapresponse); @@ -1837,14 +1826,14 @@ void processudp(u8 * buf, int len, struct sockaddr_in *addr) } else { - log(4, 0, s, t, " Got a ZLB ack\n"); + LOG(4, 0, s, t, " Got a ZLB ack\n"); } } else { // data u16 prot; - log_hex(5, "Receive Tunnel Data", p, l); + LOG_HEX(5, "Receive Tunnel Data", p, l); if (l > 2 && p[0] == 0xFF && p[1] == 0x03) { // HDLC address header, discard p += 2; @@ -1852,7 +1841,7 @@ void processudp(u8 * buf, int len, struct sockaddr_in *addr) } if (l < 2) { - log(1, ntohl(addr->sin_addr.s_addr), s, t, "Short ppp length %d\n", l); + LOG(1, ntohl(addr->sin_addr.s_addr), s, t, "Short ppp length %d\n", l); STAT(tunnel_rx_errors); return; } @@ -1878,7 +1867,7 @@ void processudp(u8 * buf, int len, struct sockaddr_in *addr) } - log(1, ntohl(addr->sin_addr.s_addr), s, t, "UDP packet contains session %d " + LOG(1, ntohl(addr->sin_addr.s_addr), s, t, "UDP packet contains session %d " "but no session[%d].tunnel exists (LAC said" " tunnel = %d). Dropping packet.\n", s, s, t); STAT(tunnel_rx_errors); @@ -1887,7 +1876,7 @@ void processudp(u8 * buf, int len, struct sockaddr_in *addr) if (session[s].die) { - log(3, ntohl(addr->sin_addr.s_addr), s, t, "Session %d is closing. Don't process PPP packets\n", s); + LOG(3, ntohl(addr->sin_addr.s_addr), s, t, "Session %d is closing. Don't process PPP packets\n", s); // I'm pretty sure this isn't right -- mo. // return; // closing session, PPP not processed } @@ -1923,33 +1912,18 @@ void processudp(u8 * buf, int len, struct sockaddr_in *addr) } else if (prot == PPPIP) { - if (!config->cluster_iam_master) + session[s].last_packet = time_now; + if (session[s].walled_garden && !config->cluster_iam_master) { - // We're a slave. Should we forward this packet to the master? - - // Is this a walled garden session, or something that needs it's - // idle time updated?? - - // Maintain the idle timeouts on the master. If this would - // significantly reset the idletimeout, run it via the master - // to refresh the master's idle timer. - // Not sure this is ideal: It may re-order packets. - - if (session[s].walled_garden || (session[s].last_packet + (ECHO_TIMEOUT/2)) < time_now) - { - master_forward_packet(buf, len, addr->sin_addr.s_addr, addr->sin_port); - session[s].last_packet = time_now; - return; - } - // fall through to processipin. - } else - session[s].last_packet = time_now; + master_forward_packet(buf, len, addr->sin_addr.s_addr, addr->sin_port); + return; + } processipin(t, s, p, l); } else { STAT(tunnel_rx_errors); - log(1, ntohl(addr->sin_addr.s_addr), s, t, "Unknown PPP protocol %04X\n", prot); + LOG(1, ntohl(addr->sin_addr.s_addr), s, t, "Unknown PPP protocol %04X\n", prot); } } } @@ -1957,7 +1931,7 @@ void processudp(u8 * buf, int len, struct sockaddr_in *addr) // read and process packet on tun void processtun(u8 * buf, int len) { - log_hex(5, "Receive TUN Data", buf, len); + LOG_HEX(5, "Receive TUN Data", buf, len); STAT(tun_rx_packets); INC_STAT(tun_rx_bytes, len); @@ -1967,7 +1941,7 @@ void processtun(u8 * buf, int len) eth_rx += len; if (len < 22) { - log(1, 0, 0, 0, "Short tun packet %d bytes\n", len); + LOG(1, 0, 0, 0, "Short tun packet %d bytes\n", len); STAT(tun_rx_errors); return; } @@ -1992,7 +1966,7 @@ int regular_cleanups(void) static clockt next_acct = 0; int a; - log(3, 0, 0, 0, "Begin regular cleanup\n"); + LOG(3, 0, 0, 0, "Begin regular cleanup\n"); for (r = 1; r < MAXRADIUS; r++) { @@ -2038,7 +2012,7 @@ int regular_cleanups(void) { controlt *c = controlnew(6); // sending HELLO controladd(c, t, 0); // send the message - log(3, tunnel[t].ip, 0, t, "Sending HELLO message\n"); + LOG(3, tunnel[t].ip, 0, t, "Sending HELLO message\n"); } // Check for tunnel changes requested from the CLI @@ -2047,7 +2021,7 @@ int regular_cleanups(void) cli_tunnel_actions[t].action = 0; if (a & CLI_TUN_KILL) { - log(2, tunnel[t].ip, 0, t, "Dropping tunnel by CLI\n"); + LOG(2, tunnel[t].ip, 0, t, "Dropping tunnel by CLI\n"); tunnelshutdown(t, "Requested by administrator"); } } @@ -2067,7 +2041,7 @@ int regular_cleanups(void) if (!session[s].die && session[s].ip && !(session[s].flags & SF_IPCP_ACKED)) { // IPCP has not completed yet. Resend - log(3, session[s].ip, s, session[s].tunnel, "No ACK for initial IPCP ConfigReq... resending\n"); + LOG(3, session[s].ip, s, session[s].tunnel, "No ACK for initial IPCP ConfigReq... resending\n"); sendipcp(session[s].tunnel, s); } @@ -2096,7 +2070,7 @@ int regular_cleanups(void) u8 *q = makeppp(b, sizeof(b), 0, 0, session[s].tunnel, s, PPPLCP); if (!q) { - log(3, session[s].ip, s, t, "failed to send ECHO packet.\n"); + LOG(3, session[s].ip, s, t, "failed to send ECHO packet.\n"); continue; } @@ -2105,7 +2079,7 @@ int regular_cleanups(void) *(u16 *)(q + 2) = htons(8); // Length *(u32 *)(q + 4) = 0; // Magic Number (not supported) - log(4, session[s].ip, s, session[s].tunnel, "No data in %d seconds, sending LCP ECHO\n", + LOG(4, session[s].ip, s, session[s].tunnel, "No data in %d seconds, sending LCP ECHO\n", (int)(time_now - session[s].last_packet)); tunnelsend(b, 24, session[s].tunnel); // send it if (++count >= MAX_ACTIONS) break; @@ -2119,14 +2093,21 @@ int regular_cleanups(void) cli_session_actions[s].action = 0; if (a & CLI_SESS_KILL) { - log(2, 0, s, session[s].tunnel, "Dropping session by CLI\n"); + LOG(2, 0, s, session[s].tunnel, "Dropping session by CLI\n"); sessionshutdown(s, "Requested by administrator"); a = 0; // dead, no need to check for other actions } - if (a & CLI_SESS_SNOOP) + if (a & CLI_SESS_NOSNOOP) + { + LOG(2, 0, s, session[s].tunnel, "Unsnooping session by CLI\n"); + session[s].snoop_ip = 0; + session[s].snoop_port = 0; + send++; + } + else if (a & CLI_SESS_SNOOP) { - log(2, 0, s, session[s].tunnel, "Snooping session by CLI (to %s:%d)\n", + LOG(2, 0, s, session[s].tunnel, "Snooping session by CLI (to %s:%d)\n", inet_toa(cli_session_actions[s].snoop_ip), cli_session_actions[s].snoop_port); session[s].snoop_ip = cli_session_actions[s].snoop_ip; @@ -2134,26 +2115,20 @@ int regular_cleanups(void) send++; } - if (a & CLI_SESS_NOSNOOP) + if (a & CLI_SESS_NOTHROTTLE) { - log(2, 0, s, session[s].tunnel, "Unsnooping session by CLI\n"); - session[s].snoop_ip = 0; - session[s].snoop_port = 0; + LOG(2, 0, s, session[s].tunnel, "Un-throttling session by CLI\n"); + throttle_session(s, 0, 0); send++; } - - if (a & CLI_SESS_THROTTLE) + else if (a & CLI_SESS_THROTTLE) { - log(2, 0, s, session[s].tunnel, "Throttling session by CLI (to %d)\n", - cli_session_actions[s].throttle); - - throttle_session(s, cli_session_actions[s].throttle); - } + LOG(2, 0, s, session[s].tunnel, "Throttling session by CLI (to %dkb/s up and %dkb/s down)\n", + cli_session_actions[s].throttle_in, + cli_session_actions[s].throttle_out); - if (a & CLI_SESS_NOTHROTTLE) - { - log(2, 0, s, session[s].tunnel, "Un-throttling session by CLI\n"); - throttle_session(s, 0); + throttle_session(s, cli_session_actions[s].throttle_in, cli_session_actions[s].throttle_out); + send++; } if (send) @@ -2163,7 +2138,7 @@ int regular_cleanups(void) } } - if (config->accounting_dir && next_acct <= TIME) + if (*config->accounting_dir && next_acct <= TIME) { // Dump accounting data next_acct = TIME + ACCT_TIME; @@ -2173,7 +2148,7 @@ int regular_cleanups(void) if (count >= MAX_ACTIONS) return 1; // Didn't finish! - log(3, 0, 0, 0, "End regular cleanup (%d actions), next in %d seconds\n", count, config->cleanup_interval); + LOG(3, 0, 0, 0, "End regular cleanup (%d actions), next in %d seconds\n", count, config->cleanup_interval); return 0; } @@ -2197,16 +2172,16 @@ int still_busy(void) if (last_talked != TIME) { - log(2,0,0,0, "Tunnel %d still has un-acked control messages.\n", i); + LOG(2,0,0,0, "Tunnel %d still has un-acked control messages.\n", i); last_talked = TIME; } return 1; } - // We stop waiting for radius after BUSY_WAIT_TIMEOUT 1/10th seconds - if (abs(TIME - start_busy_wait) > BUSY_WAIT_TIMEOUT) + // We stop waiting for radius after BUSY_WAIT_TIME 1/10th seconds + if (abs(TIME - start_busy_wait) > BUSY_WAIT_TIME) { - log(1, 0, 0, 0, "Giving up waiting for RADIUS to be empty. Shutting down anyway.\n"); + LOG(1, 0, 0, 0, "Giving up waiting for RADIUS to be empty. Shutting down anyway.\n"); return 0; } @@ -2219,7 +2194,7 @@ int still_busy(void) if (last_talked != TIME) { - log(2,0,0,0, "Radius session %d is still busy (sid %d)\n", i, radius[i].session); + LOG(2,0,0,0, "Radius session %d is still busy (sid %d)\n", i, radius[i].session); last_talked = TIME; } return 1; @@ -2228,42 +2203,37 @@ int still_busy(void) return 0; } +static fd_set readset; +static int readset_n = 0; + // main loop - gets packets on tun or udp and processes them void mainloop(void) { - fd_set cr; - int cn, i; + int i; u8 buf[65536]; struct timeval to; clockt next_cluster_ping = 0; // send initial ping immediately time_t next_clean = time_now + config->cleanup_interval; - log(4, 0, 0, 0, "Beginning of main loop. udpfd=%d, tunfd=%d, cluster_sockfd=%d, controlfd=%d\n", + LOG(4, 0, 0, 0, "Beginning of main loop. udpfd=%d, tunfd=%d, cluster_sockfd=%d, controlfd=%d\n", udpfd, tunfd, cluster_sockfd, controlfd); - FD_ZERO(&cr); - FD_SET(udpfd, &cr); - FD_SET(tunfd, &cr); - FD_SET(controlfd, &cr); - FD_SET(clifd, &cr); - if (cluster_sockfd) FD_SET(cluster_sockfd, &cr); - cn = udpfd; - if (cn < tunfd) cn = tunfd; - if (cn < controlfd) cn = controlfd; - if (cn < clifd) cn = clifd; - if (cn < cluster_sockfd) cn = cluster_sockfd; - for (i = 0; i < config->num_radfds; i++) - { - if (!radfds[i]) continue; - FD_SET(radfds[i], &cr); - if (radfds[i] > cn) - cn = radfds[i]; - } + FD_ZERO(&readset); + FD_SET(udpfd, &readset); + FD_SET(tunfd, &readset); + FD_SET(controlfd, &readset); + FD_SET(clifd, &readset); + if (cluster_sockfd) FD_SET(cluster_sockfd, &readset); + readset_n = udpfd; + if (tunfd > readset_n) readset_n = tunfd; + if (controlfd > readset_n) readset_n = controlfd; + if (clifd > readset_n) readset_n = clifd; + if (cluster_sockfd > readset_n) readset_n = cluster_sockfd; while (!main_quit || still_busy()) { fd_set r; - int n = cn; + int n = readset_n; #ifdef BGP fd_set w; int bgp_set[BGP_NUM_PEERS]; @@ -2275,7 +2245,7 @@ void mainloop(void) update_config(); } - memcpy(&r, &cr, sizeof(fd_set)); + memcpy(&r, &readset, sizeof(fd_set)); to.tv_sec = 0; to.tv_usec = 100000; // 1/10th of a second. @@ -2307,10 +2277,11 @@ void mainloop(void) TIME = now(); if (n < 0) { - if (errno == EINTR) + if (errno == EINTR || + errno == ECHILD) // EINTR was clobbered by sigchild_handler() continue; - log(0, 0, 0, 0, "Error returned from select(): %s\n", strerror(errno)); + LOG(0, 0, 0, 0, "Error returned from select(): %s\n", strerror(errno)); main_quit++; break; } @@ -2340,17 +2311,22 @@ void mainloop(void) break; } } - for (i = 0; i < config->num_radfds; i++) - if (FD_ISSET(radfds[i], &r)) - processrad(buf, recv(radfds[i], buf, sizeof(buf), 0), i); + + if (config->cluster_iam_master) + for (i = 0; i < config->num_radfds; i++) + if (FD_ISSET(radfds[i], &r)) + processrad(buf, recv(radfds[i], buf, sizeof(buf), 0), i); + if (FD_ISSET(cluster_sockfd, &r)) { int size; size = recvfrom(cluster_sockfd, buf, sizeof(buf), MSG_WAITALL, (void *) &addr, &alen); processcluster(buf, size, addr.sin_addr.s_addr); } + if (FD_ISSET(controlfd, &r)) processcontrol(buf, recvfrom(controlfd, buf, sizeof(buf), MSG_WAITALL, (void *) &addr, &alen), &addr); + if (FD_ISSET(clifd, &r)) { struct sockaddr_in addr; @@ -2359,7 +2335,7 @@ void mainloop(void) if ((sockfd = accept(clifd, (struct sockaddr *)&addr, &len)) <= 0) { - log(0, 0, 0, 0, "accept error: %s\n", strerror(errno)); + LOG(0, 0, 0, 0, "accept error: %s\n", strerror(errno)); continue; } else @@ -2440,79 +2416,141 @@ void mainloop(void) // Important!!! We MUST not process any packets past this point! } +static void stripdomain(char *host) +{ + char *p; + + if ((p = strchr(host, '.'))) + { + char *domain = 0; + char _domain[1024]; + + // strip off domain + FILE *resolv = fopen("/etc/resolv.conf", "r"); + if (resolv) + { + char buf[1024]; + char *b; + + while (fgets(buf, sizeof(buf), resolv)) + { + if (strncmp(buf, "domain", 6) && strncmp(buf, "search", 6)) + continue; + + if (!isspace(buf[6])) + continue; + + b = buf + 7; + while (isspace(*b)) b++; + + if (*b) + { + char *d = b; + while (*b && !isspace(*b)) b++; + *b = 0; + if (buf[0] == 'd') // domain is canonical + { + domain = d; + break; + } + + // first search line + if (!domain) + { + // hold, may be subsequent domain line + strncpy(_domain, d, sizeof(_domain))[sizeof(_domain)-1] = 0; + domain = _domain; + } + } + } + + fclose(resolv); + } + + if (domain) + { + int hl = strlen(host); + int dl = strlen(domain); + if (dl < hl && host[hl - dl - 1] == '.' && !strcmp(host + hl - dl, domain)) + host[hl -dl - 1] = 0; + } + else + { + *p = 0; // everything after first dot + } + } +} + // Init data structures -void initdata(void) +void initdata(int optdebug, char *optconfig) { int i; - _statistics = mmap(NULL, sizeof(struct Tstats), PROT_READ | PROT_WRITE, MAP_SHARED | MAP_ANONYMOUS, 0, 0); - if (_statistics == MAP_FAILED) + if (!(_statistics = shared_malloc(sizeof(struct Tstats)))) { - log(0, 0, 0, 0, "Error doing mmap for _statistics: %s\n", strerror(errno)); + LOG(0, 0, 0, 0, "Error doing malloc for _statistics: %s\n", strerror(errno)); exit(1); } - config = mmap(NULL, sizeof(struct configt), PROT_READ | PROT_WRITE, MAP_SHARED | MAP_ANONYMOUS, 0, 0); - if (config == MAP_FAILED) + if (!(config = shared_malloc(sizeof(struct configt)))) { - log(0, 0, 0, 0, "Error doing mmap for configuration: %s\n", strerror(errno)); + LOG(0, 0, 0, 0, "Error doing malloc for configuration: %s\n", strerror(errno)); exit(1); } memset(config, 0, sizeof(struct configt)); time(&config->start_time); - strncpy(config->config_file, CONFIGFILE, sizeof(config->config_file) - 1); - tunnel = mmap(NULL, sizeof(tunnelt) * MAXTUNNEL, PROT_READ | PROT_WRITE, MAP_SHARED | MAP_ANONYMOUS, 0, 0); - if (tunnel == MAP_FAILED) + strncpy(config->config_file, optconfig, strlen(optconfig)); + config->debug = optdebug; + config->num_tbfs = MAXTBFS; + config->rl_rate = 28; // 28kbps + + if (!(tunnel = shared_malloc(sizeof(tunnelt) * MAXTUNNEL))) { - log(0, 0, 0, 0, "Error doing mmap for tunnels: %s\n", strerror(errno)); + LOG(0, 0, 0, 0, "Error doing malloc for tunnels: %s\n", strerror(errno)); exit(1); } - session = mmap(NULL, sizeof(sessiont) * MAXSESSION, PROT_READ | PROT_WRITE, MAP_SHARED | MAP_ANONYMOUS, 0, 0); - if (session == MAP_FAILED) + if (!(session = shared_malloc(sizeof(sessiont) * MAXSESSION))) { - log(0, 0, 0, 0, "Error doing mmap for sessions: %s\n", strerror(errno)); + LOG(0, 0, 0, 0, "Error doing malloc for sessions: %s\n", strerror(errno)); exit(1); } - sess_count = mmap(NULL, sizeof(sessioncountt) * MAXSESSION, PROT_READ | PROT_WRITE, MAP_SHARED | MAP_ANONYMOUS, 0, 0); - if (sess_count == MAP_FAILED) + if (!(sess_count = shared_malloc(sizeof(sessioncountt) * MAXSESSION))) { - log(0, 0, 0, 0, "Error doing mmap for sessions_count: %s\n", strerror(errno)); + LOG(0, 0, 0, 0, "Error doing malloc for sessions_count: %s\n", strerror(errno)); exit(1); } - radius = mmap(NULL, sizeof(radiust) * MAXRADIUS, PROT_READ | PROT_WRITE, MAP_SHARED | MAP_ANONYMOUS, 0, 0); - if (radius == MAP_FAILED) + if (!(radius = shared_malloc(sizeof(radiust) * MAXRADIUS))) { - log(0, 0, 0, 0, "Error doing mmap for radius: %s\n", strerror(errno)); + LOG(0, 0, 0, 0, "Error doing malloc for radius: %s\n", strerror(errno)); exit(1); } - ip_address_pool = mmap(NULL, sizeof(ippoolt) * MAXIPPOOL, PROT_READ | PROT_WRITE, MAP_SHARED | MAP_ANONYMOUS, 0, 0); - if (ip_address_pool == MAP_FAILED) + + if (!(ip_address_pool = shared_malloc(sizeof(ippoolt) * MAXIPPOOL))) { - log(0, 0, 0, 0, "Error doing mmap for ip_address_pool: %s\n", strerror(errno)); + LOG(0, 0, 0, 0, "Error doing malloc for ip_address_pool: %s\n", strerror(errno)); exit(1); } + #ifdef RINGBUFFER - ringbuffer = mmap(NULL, sizeof(struct Tringbuffer), PROT_READ | PROT_WRITE, MAP_SHARED | MAP_ANONYMOUS, 0, 0); - if (ringbuffer == MAP_FAILED) + if (!(ringbuffer = shared_malloc(sizeof(struct Tringbuffer)))) { - log(0, 0, 0, 0, "Error doing mmap for ringbuffer: %s\n", strerror(errno)); + LOG(0, 0, 0, 0, "Error doing malloc for ringbuffer: %s\n", strerror(errno)); exit(1); } memset(ringbuffer, 0, sizeof(struct Tringbuffer)); #endif - cli_session_actions = mmap(NULL, sizeof(struct cli_session_actions) * MAXSESSION, PROT_READ | PROT_WRITE, MAP_SHARED | MAP_ANONYMOUS, 0, 0); - if (cli_session_actions == MAP_FAILED) + if (!(cli_session_actions = shared_malloc(sizeof(struct cli_session_actions) * MAXSESSION))) { - log(0, 0, 0, 0, "Error doing mmap for cli session actions: %s\n", strerror(errno)); + LOG(0, 0, 0, 0, "Error doing malloc for cli session actions: %s\n", strerror(errno)); exit(1); } memset(cli_session_actions, 0, sizeof(struct cli_session_actions) * MAXSESSION); - cli_tunnel_actions = mmap(NULL, sizeof(struct cli_tunnel_actions) * MAXSESSION, PROT_READ | PROT_WRITE, MAP_SHARED | MAP_ANONYMOUS, 0, 0); - if (cli_tunnel_actions == MAP_FAILED) + + if (!(cli_tunnel_actions = shared_malloc(sizeof(struct cli_tunnel_actions) * MAXSESSION))) { - log(0, 0, 0, 0, "Error doing mmap for cli tunnel actions: %s\n", strerror(errno)); + LOG(0, 0, 0, 0, "Error doing malloc for cli tunnel actions: %s\n", strerror(errno)); exit(1); } memset(cli_tunnel_actions, 0, sizeof(struct cli_tunnel_actions) * MAXSESSION); @@ -2537,18 +2575,17 @@ void initdata(void) if (!*hostname) { - char *p; // Grab my hostname unless it's been specified gethostname(hostname, sizeof(hostname)); - if ((p = strchr(hostname, '.'))) *p = 0; + stripdomain(hostname); } + _statistics->start_time = _statistics->last_reset = time(NULL); #ifdef BGP - bgp_peers = mmap(NULL, sizeof(struct bgp_peer) * BGP_NUM_PEERS, PROT_READ | PROT_WRITE, MAP_SHARED | MAP_ANONYMOUS, 0, 0); - if (bgp_peers == MAP_FAILED) + if (!(bgp_peers = shared_malloc(sizeof(struct bgp_peer) * BGP_NUM_PEERS))) { - log(0, 0, 0, 0, "Error doing mmap for bgp: %s\n", strerror(errno)); + LOG(0, 0, 0, 0, "Error doing malloc for bgp: %s\n", strerror(errno)); exit(1); } #endif /* BGP */ @@ -2595,7 +2632,7 @@ int assign_ip_address(sessionidt s) if (best < 0) { - log(0, 0, s, session[s].tunnel, "assign_ip_address(): out of addresses\n"); + LOG(0, 0, s, session[s].tunnel, "assign_ip_address(): out of addresses\n"); return 0; } @@ -2613,7 +2650,7 @@ int assign_ip_address(sessionidt s) strncpy(ip_address_pool[best].user, u, sizeof(ip_address_pool[best].user) - 1); STAT(ip_allocated); - log(4, ip_address_pool[best].address, s, session[s].tunnel, + LOG(4, ip_address_pool[best].address, s, session[s].tunnel, "assign_ip_address(): %s ip address %d from pool\n", reuse ? "Reusing" : "Allocating", best); return 1; @@ -2678,7 +2715,7 @@ void rebuild_address_pool(void) if (ipid < 1) // Not found in the pool either? good. continue; - log(0, 0, i, 0, "Session %d has an IP address (%s) that was marked static, but is in the pool (%d)!\n", + LOG(0, 0, i, 0, "Session %d has an IP address (%s) that was marked static, but is in the pool (%d)!\n", i, inet_toa(session[i].ip), ipid); // Fall through and process it as part of the pool. @@ -2687,7 +2724,7 @@ void rebuild_address_pool(void) if (ipid > MAXIPPOOL || ipid < 0) { - log(0, 0, i, 0, "Session %d has a pool IP that's not found in the pool! (%d)\n", i, ipid); + LOG(0, 0, i, 0, "Session %d has a pool IP that's not found in the pool! (%d)\n", i, ipid); ipid = -1; session[i].ip_pool_index = ipid; continue; @@ -2747,7 +2784,7 @@ void add_to_ip_pool(u32 addr, u32 mask) ++ip_pool_size; if (ip_pool_size >= MAXIPPOOL) { - log(0,0,0,0, "Overflowed IP pool adding %s\n", inet_toa(htonl(addr)) ); + LOG(0,0,0,0, "Overflowed IP pool adding %s\n", inet_toa(htonl(addr)) ); return; } } @@ -2763,7 +2800,7 @@ void initippool() if (!(f = fopen(IPPOOLFILE, "r"))) { - log(0, 0, 0, 0, "Can't load pool file " IPPOOLFILE ": %s\n", strerror(errno)); + LOG(0, 0, 0, 0, "Can't load pool file " IPPOOLFILE ": %s\n", strerror(errno)); exit(1); } @@ -2782,7 +2819,7 @@ void initippool() src = inet_addr(buf); if (src == INADDR_NONE) { - log(0, 0, 0, 0, "Invalid address pool IP %s\n", buf); + LOG(0, 0, 0, 0, "Invalid address pool IP %s\n", buf); exit(1); } // This entry is for a specific IP only @@ -2797,18 +2834,18 @@ void initippool() int numbits = 0; u32 start = 0, mask = 0; - log(2, 0, 0, 0, "Adding IP address range %s\n", buf); + LOG(2, 0, 0, 0, "Adding IP address range %s\n", buf); *p++ = 0; if (!*p || !(numbits = atoi(p))) { - log(0, 0, 0, 0, "Invalid pool range %s\n", buf); + LOG(0, 0, 0, 0, "Invalid pool range %s\n", buf); continue; } start = ntohl(inet_addr(pool)); mask = (u32)(pow(2, numbits) - 1) << (32 - numbits); // Add a static route for this pool - log(5, 0, 0, 0, "Adding route for address pool %s/%u\n", inet_toa(htonl(start)), 32 + mask); + LOG(5, 0, 0, 0, "Adding route for address pool %s/%u\n", inet_toa(htonl(start)), 32 + mask); routeset(0, start, mask, 0, 1); add_to_ip_pool(start, mask); @@ -2820,7 +2857,7 @@ void initippool() } } fclose(f); - log(1, 0, 0, 0, "IP address pool is %d addresses\n", ip_pool_size - 1); + LOG(1, 0, 0, 0, "IP address pool is %d addresses\n", ip_pool_size - 1); } void snoop_send_packet(char *packet, u16 size, ipt destination, u16 port) @@ -2833,10 +2870,10 @@ void snoop_send_packet(char *packet, u16 size, ipt destination, u16 port) snoop_addr.sin_addr.s_addr = destination; snoop_addr.sin_port = ntohs(port); - log(5, 0, 0, 0, "Snooping packet at %p (%d bytes) to %s:%d\n", + LOG(5, 0, 0, 0, "Snooping packet at %p (%d bytes) to %s:%d\n", packet, size, inet_toa(snoop_addr.sin_addr.s_addr), htons(snoop_addr.sin_port)); if (sendto(snoopfd, packet, size, MSG_DONTWAIT | MSG_NOSIGNAL, (void *) &snoop_addr, sizeof(snoop_addr)) < 0) - log(0, 0, 0, 0, "Error sending intercept packet: %s\n", strerror(errno)); + LOG(0, 0, 0, 0, "Error sending intercept packet: %s\n", strerror(errno)); STAT(packets_snooped); } @@ -2856,17 +2893,17 @@ void dump_acct_info() for (i = 0; i < MAXSESSION; i++) { - if (!session[i].opened || !session[i].ip || !session[i].cin || !session[i].cout || !*session[i].user || session[i].walled_garden) + if (!session[i].opened || !session[i].ip || !(session[i].cin || session[i].cout) || !*session[i].user || session[i].walled_garden) continue; if (!f) { time_t now = time(NULL); if (!(f = fopen(filename, "w"))) { - log(0, 0, 0, 0, "Can't write accounting info to %s: %s\n", filename, strerror(errno)); + LOG(0, 0, 0, 0, "Can't write accounting info to %s: %s\n", filename, strerror(errno)); return ; } - log(3, 0, 0, 0, "Dumping accounting information to %s\n", filename); + LOG(3, 0, 0, 0, "Dumping accounting information to %s\n", filename); fprintf(f, "# dslwatch.pl dump file V1.01\n" "# host: %s\n" "# time: %ld\n" @@ -2877,13 +2914,13 @@ void dump_acct_info() now - basetime); } - log(4, 0, 0, 0, "Dumping accounting information for %s\n", session[i].user); + LOG(4, 0, 0, 0, "Dumping accounting information for %s\n", session[i].user); fprintf(f, "%s %s %d %u %u\n", - session[i].user, // username - inet_toa(htonl(session[i].ip)), // ip - (session[i].throttle) ? 2 : 1, // qos - (u32)session[i].cin, // uptxoctets - (u32)session[i].cout); // downrxoctets + session[i].user, // username + inet_toa(htonl(session[i].ip)), // ip + (session[i].throttle_in || session[i].throttle_out) ? 2 : 1, // qos + (u32)session[i].cin, // uptxoctets + (u32)session[i].cout); // downrxoctets session[i].pin = session[i].cin = 0; session[i].pout = session[i].cout = 0; @@ -2898,28 +2935,33 @@ int main(int argc, char *argv[]) { int o; int optdebug = 0; + char *optconfig = CONFIGFILE; _program_name = strdup(argv[0]); time(&basetime); // start clock // scan args - while ((o = getopt(argc, argv, "vc:h:a:")) >= 0) + while ((o = getopt(argc, argv, "dvc:h:")) >= 0) { switch (o) { case 'd': - // Double fork to detach from terminal - if (fork()) exit(0); if (fork()) exit(0); + setsid(); + freopen("/dev/null", "r", stdin); + freopen("/dev/null", "w", stdout); + freopen("/dev/null", "w", stderr); break; case 'v': optdebug++; break; + case 'c': + optconfig = optarg; + break; case 'h': snprintf(hostname, sizeof(hostname), "%s", optarg); break; - case '?': default: printf("Args are:\n" "\t-d\tDetach from terminal\n" @@ -2941,24 +2983,22 @@ int main(int argc, char *argv[]) initiptables(); initplugins(); - initdata(); - - config->debug = optdebug; + initdata(optdebug, optconfig); - init_tbf(); init_cli(hostname); read_config_file(); + init_tbf(config->num_tbfs); - log(0, 0, 0, 0, "L2TPNS version " VERSION "\n"); - log(0, 0, 0, 0, "Copyright (c) 2003, 2004 Optus Internet Engineering\n"); - log(0, 0, 0, 0, "Copyright (c) 2002 FireBrick (Andrews & Arnold Ltd / Watchfront Ltd) - GPL licenced\n"); + LOG(0, 0, 0, 0, "L2TPNS version " VERSION "\n"); + LOG(0, 0, 0, 0, "Copyright (c) 2003, 2004 Optus Internet Engineering\n"); + LOG(0, 0, 0, 0, "Copyright (c) 2002 FireBrick (Andrews & Arnold Ltd / Watchfront Ltd) - GPL licenced\n"); { struct rlimit rlim; rlim.rlim_cur = RLIM_INFINITY; rlim.rlim_max = RLIM_INFINITY; // Remove the maximum core size if (setrlimit(RLIMIT_CORE, &rlim) < 0) - log(0, 0, 0, 0, "Can't set ulimit: %s\n", strerror(errno)); + LOG(0, 0, 0, 0, "Can't set ulimit: %s\n", strerror(errno)); // Make core dumps go to /tmp chdir("/tmp"); } @@ -2971,18 +3011,18 @@ int main(int argc, char *argv[]) if (get_nprocs() < 2) { - log(0, 0, 0, 0, "Not using FIFO scheduler, there is only 1 processor in the system.\n"); + LOG(0, 0, 0, 0, "Not using FIFO scheduler, there is only 1 processor in the system.\n"); config->scheduler_fifo = 0; } else { if ((ret = sched_setscheduler(0, SCHED_FIFO, ¶ms)) == 0) { - log(1, 0, 0, 0, "Using FIFO scheduler. Say goodbye to any other processes running\n"); + LOG(1, 0, 0, 0, "Using FIFO scheduler. Say goodbye to any other processes running\n"); } else { - log(0, 0, 0, 0, "Error setting scheduler to FIFO: %s\n", strerror(errno)); + LOG(0, 0, 0, 0, "Error setting scheduler to FIFO: %s\n", strerror(errno)); config->scheduler_fifo = 0; } } @@ -3006,7 +3046,7 @@ int main(int argc, char *argv[]) #endif /* BGP */ inittun(); - log(1, 0, 0, 0, "Set up on interface %s\n", config->tundevice); + LOG(1, 0, 0, 0, "Set up on interface %s\n", config->tundevice); initudp(); initrad(); @@ -3024,9 +3064,9 @@ int main(int argc, char *argv[]) if (config->lock_pages) { if (!mlockall(MCL_CURRENT)) - log(1, 0, 0, 0, "Locking pages into memory\n"); + LOG(1, 0, 0, 0, "Locking pages into memory\n"); else - log(0, 0, 0, 0, "Can't lock pages: %s\n", strerror(errno)); + LOG(0, 0, 0, 0, "Can't lock pages: %s\n", strerror(errno)); } alarm(1); @@ -3107,7 +3147,7 @@ void sigalrm_handler(int junk) void sigterm_handler(int junk) { - log(1, 0, 0, 0, "Shutting down cleanly\n"); + LOG(1, 0, 0, 0, "Shutting down cleanly\n"); if (config->save_state) dump_state(); @@ -3118,7 +3158,7 @@ void sigquit_handler(int junk) { int i; - log(1, 0, 0, 0, "Shutting down without saving sessions\n"); + LOG(1, 0, 0, 0, "Shutting down without saving sessions\n"); for (i = 1; i < MAXSESSION; i++) { if (session[i].opened) @@ -3162,7 +3202,7 @@ void read_state() if (sb.st_mtime < (time(NULL) - 60)) { - log(0, 0, 0, 0, "State file is too old to read, ignoring\n"); + LOG(0, 0, 0, 0, "State file is too old to read, ignoring\n"); unlink(STATEFILE); return ; } @@ -3172,41 +3212,41 @@ void read_state() if (!f) { - log(0, 0, 0, 0, "Can't read state file: %s\n", strerror(errno)); + LOG(0, 0, 0, 0, "Can't read state file: %s\n", strerror(errno)); exit(1); } if (fread(magic, sizeof(magic), 1, f) != 1 || strncmp(magic, DUMP_MAGIC, sizeof(magic))) { - log(0, 0, 0, 0, "Bad state file magic\n"); + LOG(0, 0, 0, 0, "Bad state file magic\n"); exit(1); } - log(1, 0, 0, 0, "Reading state information\n"); + LOG(1, 0, 0, 0, "Reading state information\n"); if (fread(buf, sizeof(buf), 1, f) != 1 || buf[0] > MAXIPPOOL || buf[1] != sizeof(ippoolt)) { - log(0, 0, 0, 0, "Error/mismatch reading ip pool header from state file\n"); + LOG(0, 0, 0, 0, "Error/mismatch reading ip pool header from state file\n"); exit(1); } if (buf[0] > ip_pool_size) { - log(0, 0, 0, 0, "ip pool has shrunk! state = %d, current = %d\n", buf[0], ip_pool_size); + LOG(0, 0, 0, 0, "ip pool has shrunk! state = %d, current = %d\n", buf[0], ip_pool_size); exit(1); } - log(2, 0, 0, 0, "Loading %u ip addresses\n", buf[0]); + LOG(2, 0, 0, 0, "Loading %u ip addresses\n", buf[0]); for (i = 0; i < buf[0]; i++) { if (fread(&itmp, sizeof(itmp), 1, f) != 1) { - log(0, 0, 0, 0, "Error reading ip %d from state file: %s\n", i, strerror(errno)); + LOG(0, 0, 0, 0, "Error reading ip %d from state file: %s\n", i, strerror(errno)); exit(1); } if (itmp.address != ip_address_pool[i].address) { - log(0, 0, 0, 0, "Mismatched ip %d from state file: pool may only be extended\n", i); + LOG(0, 0, 0, 0, "Mismatched ip %d from state file: pool may only be extended\n", i); exit(1); } @@ -3215,14 +3255,14 @@ void read_state() if (fread(buf, sizeof(buf), 1, f) != 1 || buf[0] != MAXTUNNEL || buf[1] != sizeof(tunnelt)) { - log(0, 0, 0, 0, "Error/mismatch reading tunnel header from state file\n"); + LOG(0, 0, 0, 0, "Error/mismatch reading tunnel header from state file\n"); exit(1); } - log(2, 0, 0, 0, "Loading %u tunnels\n", MAXTUNNEL); + LOG(2, 0, 0, 0, "Loading %u tunnels\n", MAXTUNNEL); if (fread(tunnel, sizeof(tunnelt), MAXTUNNEL, f) != MAXTUNNEL) { - log(0, 0, 0, 0, "Error reading tunnel data from state file\n"); + LOG(0, 0, 0, 0, "Error reading tunnel data from state file\n"); exit(1); } @@ -3232,19 +3272,19 @@ void read_state() tunnel[i].controls = NULL; tunnel[i].controle = NULL; if (*tunnel[i].hostname) - log(3, 0, 0, 0, "Created tunnel for %s\n", tunnel[i].hostname); + LOG(3, 0, 0, 0, "Created tunnel for %s\n", tunnel[i].hostname); } if (fread(buf, sizeof(buf), 1, f) != 1 || buf[0] != MAXSESSION || buf[1] != sizeof(sessiont)) { - log(0, 0, 0, 0, "Error/mismatch reading session header from state file\n"); + LOG(0, 0, 0, 0, "Error/mismatch reading session header from state file\n"); exit(1); } - log(2, 0, 0, 0, "Loading %u sessions\n", MAXSESSION); + LOG(2, 0, 0, 0, "Loading %u sessions\n", MAXSESSION); if (fread(session, sizeof(sessiont), MAXSESSION, f) != MAXSESSION) { - log(0, 0, 0, 0, "Error reading session data from state file\n"); + LOG(0, 0, 0, 0, "Error reading session data from state file\n"); exit(1); } @@ -3254,14 +3294,14 @@ void read_state() session[i].tbf_out = 0; if (session[i].opened) { - log(2, 0, i, 0, "Loaded active session for user %s\n", session[i].user); + LOG(2, 0, i, 0, "Loaded active session for user %s\n", session[i].user); if (session[i].ip) sessionsetup(session[i].tunnel, i); } } fclose(f); - log(0, 0, 0, 0, "Loaded saved state information\n"); + LOG(0, 0, 0, 0, "Loaded saved state information\n"); } void dump_state() @@ -3277,12 +3317,12 @@ void dump_state() if (!(f = fopen(STATEFILE, "w"))) break; - log(1, 0, 0, 0, "Dumping state information\n"); + LOG(1, 0, 0, 0, "Dumping state information\n"); if (fwrite(DUMP_MAGIC, sizeof(DUMP_MAGIC) - 1, 1, f) != 1) break; - log(2, 0, 0, 0, "Dumping %u ip addresses\n", ip_pool_size); + LOG(2, 0, 0, 0, "Dumping %u ip addresses\n", ip_pool_size); buf[0] = ip_pool_size; buf[1] = sizeof(ippoolt); if (fwrite(buf, sizeof(buf), 1, f) != 1) @@ -3290,7 +3330,7 @@ void dump_state() if (fwrite(ip_address_pool, sizeof(ippoolt), ip_pool_size, f) != ip_pool_size) break; - log(2, 0, 0, 0, "Dumping %u tunnels\n", MAXTUNNEL); + LOG(2, 0, 0, 0, "Dumping %u tunnels\n", MAXTUNNEL); buf[0] = MAXTUNNEL; buf[1] = sizeof(tunnelt); if (fwrite(buf, sizeof(buf), 1, f) != 1) @@ -3298,7 +3338,7 @@ void dump_state() if (fwrite(tunnel, sizeof(tunnelt), MAXTUNNEL, f) != MAXTUNNEL) break; - log(2, 0, 0, 0, "Dumping %u sessions\n", MAXSESSION); + LOG(2, 0, 0, 0, "Dumping %u sessions\n", MAXSESSION); buf[0] = MAXSESSION; buf[1] = sizeof(sessiont); if (fwrite(buf, sizeof(buf), 1, f) != 1) @@ -3311,7 +3351,7 @@ void dump_state() } while (0); - log(0, 0, 0, 0, "Can't write state information: %s\n", strerror(errno)); + LOG(0, 0, 0, 0, "Can't write state information: %s\n", strerror(errno)); unlink(STATEFILE); } @@ -3322,11 +3362,11 @@ void build_chap_response(char *challenge, u8 id, u16 challenge_length, char **ch if (!*config->l2tpsecret) { - log(0, 0, 0, 0, "LNS requested CHAP authentication, but no l2tp secret is defined\n"); + LOG(0, 0, 0, 0, "LNS requested CHAP authentication, but no l2tp secret is defined\n"); return; } - log(4, 0, 0, 0, " Building challenge response for CHAP request\n"); + LOG(4, 0, 0, 0, " Building challenge response for CHAP request\n"); *challenge_response = (char *)calloc(17, 1); @@ -3417,7 +3457,7 @@ void update_config() if (!config->numradiusservers) { - log(0, 0, 0, 0, "No RADIUS servers defined!\n"); + LOG(0, 0, 0, 0, "No RADIUS servers defined!\n"); } config->num_radfds = 2 << RADIUS_SHIFT; @@ -3459,7 +3499,7 @@ void update_config() if (config->cluster_hb_timeout < t) { - log(0,0,0,0, "Heartbeat timeout %d too low, adjusting to %d\n", config->cluster_hb_timeout, t); + LOG(0,0,0,0, "Heartbeat timeout %d too low, adjusting to %d\n", config->cluster_hb_timeout, t); config->cluster_hb_timeout = t; } @@ -3483,7 +3523,7 @@ void update_config() } else { - log(0, 0, 0, 0, "Can't write to PID file %s: %s\n", config->pid_file, strerror(errno)); + LOG(0, 0, 0, 0, "Can't write to PID file %s: %s\n", config->pid_file, strerror(errno)); } } @@ -3501,9 +3541,9 @@ void read_config_file() return; } - log(3, 0, 0, 0, "Reading config file %s\n", config->config_file); + LOG(3, 0, 0, 0, "Reading config file %s\n", config->config_file); cli_do_file(f); - log(3, 0, 0, 0, "Done reading config file\n"); + LOG(3, 0, 0, 0, "Done reading config file\n"); fclose(f); update_config(); } @@ -3518,17 +3558,19 @@ int sessionsetup(tunnelidt t, sessionidt s) CSTAT(call_sessionsetup); - - log(3, session[s].ip, s, t, "Doing session setup for session\n"); + LOG(3, session[s].ip, s, t, "Doing session setup for session\n"); if (!session[s].ip || session[s].ip == 0xFFFFFFFE) { assign_ip_address(s); - if (session[s].ip) - log(3, 0, s, t, " No IP allocated. Assigned %s from pool\n", - inet_toa(htonl(session[s].ip))); - else - log(0, 0, s, t, " No IP allocated. The IP address pool is FULL!\n"); + if (!session[s].ip) + { + LOG(0, 0, s, t, " No IP allocated. The IP address pool is FULL!\n"); + sessionshutdown(s, "No IP addresses available"); + return 0; + } + LOG(3, 0, s, t, " No IP allocated. Assigned %s from pool\n", + inet_toa(htonl(session[s].ip))); } @@ -3563,12 +3605,12 @@ int sessionsetup(tunnelidt t, sessionidt s) for (r = 0; r < MAXROUTE && session[s].route[r].ip; r++) routeset(s, session[s].route[r].ip, session[s].route[r].mask, session[s].ip, 1); - if (!session[s].sid) + if (!session[s].unique_id) { // did this session just finish radius? - log(3, session[s].ip, s, t, "Sending initial IPCP to client\n"); + LOG(3, session[s].ip, s, t, "Sending initial IPCP to client\n"); sendipcp(t, s); - session[s].sid = ++last_sid; + session[s].unique_id = ++last_id; } // Run the plugin's against this new session. @@ -3577,10 +3619,9 @@ int sessionsetup(tunnelidt t, sessionidt s) run_plugins(PLUGIN_NEW_SESSION, &data); } - // Force throttling on or off (Actually : refresh the current throttling status) - // This has the advantage of cleaning up after another throttled user who may have left - // firewall rules lying around - throttle_session(s, session[s].throttle); + // Allocate TBFs if throttled + if (session[s].throttle_in || session[s].throttle_out) + throttle_session(s, session[s].throttle_in, session[s].throttle_out); session[s].last_packet = time_now; @@ -3588,7 +3629,7 @@ int sessionsetup(tunnelidt t, sessionidt s) char *sessionip, *tunnelip; sessionip = strdup(inet_toa(htonl(session[s].ip))); tunnelip = strdup(inet_toa(htonl(tunnel[t].ip))); - log(2, session[s].ip, s, t, "Login by %s at %s from %s (%s)\n", + LOG(2, session[s].ip, s, t, "Login by %s at %s from %s (%s)\n", session[s].user, sessionip, tunnelip, tunnel[t].hostname); if (sessionip) free(sessionip); if (tunnelip) free(tunnelip); @@ -3611,7 +3652,7 @@ int load_session(sessionidt s, sessiont *new) if (new->ip_pool_index >= MAXIPPOOL || new->tunnel >= MAXTUNNEL) { - log(0,0,s,0, "Strange session update received!\n"); + LOG(0,0,s,0, "Strange session update received!\n"); // FIXME! What to do here? return 0; } @@ -3669,6 +3710,12 @@ int load_session(sessionidt s, sessiont *new) // for walking the sessions to forward byte counts to the master. config->cluster_highest_sessionid = s; + // TEMP: old session struct used a u32 to define the throttle + // speed for both up/down, new uses a u16 for each. Deal with + // sessions from an old master for migration. + if (new->throttle_out == 0 && new->tbf_out) + new->throttle_out = new->throttle_in; + memcpy(&session[s], new, sizeof(session[s])); // Copy over.. // Do fixups into address pool. @@ -3708,7 +3755,7 @@ static void *open_plugin(char *plugin_name, int load) char path[256] = ""; snprintf(path, 256, PLUGINDIR "/%s.so", plugin_name); - log(2, 0, 0, 0, "%soading plugin from %s\n", load ? "L" : "Un-l", path); + LOG(2, 0, 0, 0, "%soading plugin from %s\n", load ? "L" : "Un-l", path); return dlopen(path, RTLD_NOW); } @@ -3732,7 +3779,7 @@ void add_plugin(char *plugin_name) if (!p) { - log(1, 0, 0, 0, " Plugin load failed: %s\n", dlerror()); + LOG(1, 0, 0, 0, " Plugin load failed: %s\n", dlerror()); return; } @@ -3746,7 +3793,7 @@ void add_plugin(char *plugin_name) int *v = dlsym(p, "__plugin_api_version"); if (!v || *v != PLUGIN_API_VERSION) { - log(1, 0, 0, 0, " Plugin load failed: API version mismatch: %s\n", dlerror()); + LOG(1, 0, 0, 0, " Plugin load failed: API version mismatch: %s\n", dlerror()); dlclose(p); return; } @@ -3756,7 +3803,7 @@ void add_plugin(char *plugin_name) { if (!initfunc(&funcs)) { - log(1, 0, 0, 0, " Plugin load failed: plugin_init() returned FALSE: %s\n", dlerror()); + LOG(1, 0, 0, 0, " Plugin load failed: plugin_init() returned FALSE: %s\n", dlerror()); dlclose(p); return; } @@ -3769,12 +3816,12 @@ void add_plugin(char *plugin_name) void *x; if (plugin_functions[i] && (x = dlsym(p, plugin_functions[i]))) { - log(3, 0, 0, 0, " Supports function \"%s\"\n", plugin_functions[i]); + LOG(3, 0, 0, 0, " Supports function \"%s\"\n", plugin_functions[i]); ll_push(plugins[i], x); } } - log(2, 0, 0, 0, " Loaded plugin %s\n", plugin_name); + LOG(2, 0, 0, 0, " Loaded plugin %s\n", plugin_name); } static void run_plugin_done(void *plugin) @@ -3807,7 +3854,7 @@ void remove_plugin(char *plugin_name) } dlclose(p); - log(2, 0, 0, 0, "Removed plugin %s\n", plugin_name); + LOG(2, 0, 0, 0, "Removed plugin %s\n", plugin_name); } int run_plugins(int plugin_type, void *data) @@ -3844,7 +3891,7 @@ void processcontrol(u8 * buf, int len, struct sockaddr_in *addr) if (log_stream && config->debug >= 4) { - log(4, ntohl(addr->sin_addr.s_addr), 0, 0, "Received "); + LOG(4, ntohl(addr->sin_addr.s_addr), 0, 0, "Received "); dump_packet(buf, log_stream); } @@ -3864,7 +3911,7 @@ void processcontrol(u8 * buf, int len, struct sockaddr_in *addr) if (param.send_response) { send_packet(controlfd, ntohl(addr->sin_addr.s_addr), ntohs(addr->sin_port), param.response, param.response_length); - log(4, ntohl(addr->sin_addr.s_addr), 0, 0, "Sent Control packet response\n"); + LOG(4, ntohl(addr->sin_addr.s_addr), 0, 0, "Sent Control packet response\n"); } free(resp); @@ -3878,7 +3925,7 @@ void tunnel_clean() { int i; - log(1, 0, 0, 0, "Cleaning tunnels array\n"); + LOG(1, 0, 0, 0, "Cleaning tunnels array\n"); for (i = 1; i < MAXTUNNEL; i++) { @@ -3905,13 +3952,13 @@ tunnelidt new_tunnel() { if (tunnel[i].state == TUNNELFREE) { - log(4, 0, 0, i, "Assigning tunnel ID %d\n", i); + LOG(4, 0, 0, i, "Assigning tunnel ID %d\n", i); if (i > config->cluster_highest_tunnelid) config->cluster_highest_tunnelid = i; return i; } } - log(0, 0, 0, 0, "Can't find a free tunnel! There shouldn't be this many in use!\n"); + LOG(0, 0, 0, 0, "Can't find a free tunnel! There shouldn't be this many in use!\n"); return 0; } @@ -3924,19 +3971,33 @@ tunnelidt new_tunnel() // void become_master(void) { - int s; + int s, i; run_plugins(PLUGIN_BECOME_MASTER, NULL); - for (s = 1; s <= config->cluster_highest_sessionid ; ++s) + // running a bunch of iptables commands is slow and can cause + // the master to drop tunnels on takeover--kludge around the + // problem by forking for the moment (note: race) + if (!fork_and_close()) { - if (!session[s].tunnel) // Not an in-use session. - continue; + for (s = 1; s <= config->cluster_highest_sessionid ; ++s) + { + if (!session[s].tunnel) // Not an in-use session. + continue; - run_plugins(PLUGIN_NEW_SESSION_MASTER, &session[s]); + run_plugins(PLUGIN_NEW_SESSION_MASTER, &session[s]); + } + exit(0); } -} - + // add radius fds + for (i = 0; i < config->num_radfds; i++) + { + if (!radfds[i]) continue; + FD_SET(radfds[i], &readset); + if (radfds[i] > readset_n) + readset_n = radfds[i]; + } +} int cmd_show_hist_idle(struct cli_def *cli, char *command, char **argv, int argc) { @@ -4015,3 +4076,77 @@ int cmd_show_hist_open(struct cli_def *cli, char *command, char **argv, int argc cli_print(cli, "%d total sessions open.", count); return CLI_OK; } + +/* Unhide an avp. + * + * This unencodes the AVP using the L2TP CHAP secret and the + * previously stored random vector. It replaces the hidden data with + * the cleartext data and returns the length of the cleartext data + * (including the AVP "header" of 6 bytes). + * + * Based on code from rp-l2tpd by Roaring Penguin Software Inc. + */ +int unhide_avp(u8 *avp, tunnelidt t, sessionidt s, u16 length) +{ + MD5_CTX ctx; + u8 *cursor; + u8 digest[16]; + u8 working_vector[16]; + uint16_t hidden_length; + u8 type[2]; + size_t done, todo; + u8 *output; + + // Find the AVP type. + type[0] = *(avp + 4); + type[1] = *(avp + 5); + + // Line up with the hidden data + cursor = output = avp + 6; + + // Compute initial pad + MD5Init(&ctx); + MD5Update(&ctx, type, 2); + MD5Update(&ctx, config->l2tpsecret, strlen(config->l2tpsecret)); + MD5Update(&ctx, session[s].random_vector, session[s].random_vector_length); + MD5Final(digest, &ctx); + + // Get hidden length + hidden_length = ((uint16_t) (digest[0] ^ cursor[0])) * 256 + (uint16_t) (digest[1] ^ cursor[1]); + + // Keep these for later use + working_vector[0] = *cursor; + working_vector[1] = *(cursor + 1); + cursor += 2; + + if (hidden_length > length - 8) + { + LOG(1, 0, s, t, "Hidden length %d too long in AVP of length %d\n", (int) hidden_length, (int) length); + return 0; + } + + /* Decrypt remainder */ + done = 2; + todo = hidden_length; + while (todo) + { + working_vector[done] = *cursor; + *output = digest[done] ^ *cursor; + ++output; + ++cursor; + --todo; + ++done; + if (done == 16 && todo) + { + // Compute new digest + done = 0; + MD5Init(&ctx); + MD5Update(&ctx, config->l2tpsecret, strlen(config->l2tpsecret)); + MD5Update(&ctx, &working_vector, 16); + MD5Final(digest, &ctx); + } + } + + return hidden_length + 6; +} +