X-Git-Url: http://git.sameswireless.fr/l2tpns.git/blobdiff_plain/55da6699c1259cbbcb6da40b674bdfa7102e8970..0c678c5a03bcdc601ea50bb7d8e273101cc5e557:/l2tpns.c diff --git a/l2tpns.c b/l2tpns.c index 5bac272..9671a69 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 1.118 2005-08-10 08:36:48 bodea Exp $"; +char const *cvs_id_l2tpns = "$Id: l2tpns.c,v 1.132 2005-09-15 09:34:48 bodea Exp $"; #include #include @@ -108,6 +108,7 @@ config_descriptt config_values[] = { CONFIG("ppp_restart_time", ppp_restart_time, INT), CONFIG("ppp_max_configure", ppp_max_configure, INT), CONFIG("ppp_max_failure", ppp_max_failure, INT), + CONFIG("ppp_mru", ppp_mru, INT), CONFIG("primary_dns", default_dns1, IPv4), CONFIG("secondary_dns", default_dns2, IPv4), CONFIG("primary_radius", radiusserver[0], IPv4), @@ -135,6 +136,7 @@ config_descriptt config_values[] = { CONFIG("packet_limit", max_packets, INT), CONFIG("cluster_address", cluster_address, IPv4), CONFIG("cluster_interface", cluster_interface, STRING), + CONFIG("cluster_mcast_ttl", cluster_mcast_ttl, INT), CONFIG("cluster_hb_interval", cluster_hb_interval, INT), CONFIG("cluster_hb_timeout", cluster_hb_timeout, INT), CONFIG("cluster_master_min_adv", cluster_master_min_adv, INT), @@ -1104,7 +1106,7 @@ static void processipout(uint8_t *buf, int len) // Add on L2TP header { - uint8_t *p = makeppp(b, sizeof(b), buf, len, t, s, PPPIP); + uint8_t *p = makeppp(b, sizeof(b), buf, len, s, t, PPPIP); if (!p) return; tunnelsend(b, len + (p-b), t); // send it... } @@ -1215,7 +1217,7 @@ static void processipv6out(uint8_t * buf, int len) // Add on L2TP header { - uint8_t *p = makeppp(b, sizeof(b), buf, len, t, s, PPPIPV6); + uint8_t *p = makeppp(b, sizeof(b), buf, len, s, t, PPPIPV6); if (!p) return; tunnelsend(b, len + (p-b), t); // send it... } @@ -1267,7 +1269,7 @@ static void send_ipout(sessionidt s, uint8_t *buf, int len) // Add on L2TP header { - uint8_t *p = makeppp(b, sizeof(b), buf, len, t, s, PPPIP); + uint8_t *p = makeppp(b, sizeof(b), buf, len, s, t, PPPIP); if (!p) return; tunnelsend(b, len + (p-b), t); // send it... } @@ -1366,7 +1368,7 @@ static void controlnull(tunnelidt t) } // add a control message to a tunnel, and send if within window -static void controladd(controlt * c, tunnelidt t, sessionidt far) +static void controladd(controlt *c, sessionidt far, tunnelidt t) { *(uint16_t *) (c->buf + 2) = htons(c->length); // length *(uint16_t *) (c->buf + 4) = htons(tunnel[t].far); // tunnel @@ -1558,7 +1560,7 @@ void sessionshutdown(sessionidt s, char *reason, int result, int error) control16(c, 1, result, 1); control16(c, 14, s, 1); // assigned session (our end) - controladd(c, session[s].tunnel, session[s].far); // send the message + controladd(c, session[s].far, session[s].tunnel); // send the message } if (!session[s].die) @@ -1578,12 +1580,13 @@ void sessionshutdown(sessionidt s, char *reason, int result, int error) cluster_send_session(s); } -void sendipcp(tunnelidt t, sessionidt s) +void sendipcp(sessionidt s, tunnelidt t) { - uint8_t buf[MAXCONTROL]; + uint8_t buf[MAXETHER]; uint8_t *q; CSTAT(sendipcp); + LOG(3, s, t, "IPCP: send ConfigReq\n"); if (!session[s].unique_id) { @@ -1591,7 +1594,7 @@ void sendipcp(tunnelidt t, sessionidt s) session[s].unique_id = last_id; } - q = makeppp(buf,sizeof(buf), 0, 0, t, s, PPPIPCP); + q = makeppp(buf, sizeof(buf), 0, 0, s, t, PPPIPCP); if (!q) return; *q = ConfigReq; @@ -1606,14 +1609,15 @@ void sendipcp(tunnelidt t, sessionidt s) tunnelsend(buf, 10 + (q - buf), t); // send it } -void sendipv6cp(tunnelidt t, sessionidt s) +void sendipv6cp(sessionidt s, tunnelidt t) { - uint8_t buf[MAXCONTROL]; + uint8_t buf[MAXETHER]; uint8_t *q; CSTAT(sendipv6cp); + LOG(3, s, t, "IPV6CP: send ConfigReq\n"); - q = makeppp(buf,sizeof(buf), 0, 0, t, s, PPPIPV6CP); + q = makeppp(buf, sizeof(buf), 0, 0, s, t, PPPIPV6CP); if (!q) return; *q = ConfigReq; @@ -1753,7 +1757,7 @@ static void tunnelshutdown(tunnelidt t, char *reason, int result, int error, cha control16(c, 1, result, 1); control16(c, 9, t, 1); // assigned tunnel (our end) - controladd(c, t, 0); // send the message + controladd(c, 0, t); // send the message } } @@ -1824,12 +1828,16 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr) return; } l -= (p - buf); + + // used to time out old tunnels + if (t && tunnel[t].state == TUNNELOPEN) + tunnel[t].lastrec = time_now; + if (*buf & 0x80) { // control uint16_t message = 0xFFFF; // message type uint8_t fatal = 0; uint8_t mandatory = 0; - uint8_t authtype = 0; // proxy auth type uint16_t asession = 0; // assigned session uint32_t amagic = 0; // magic number uint8_t aflags = 0; // flags from last LCF @@ -1912,9 +1920,6 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr) return; } - // This is used to time out old tunnels - tunnel[t].lastrec = time_now; - // check sequence of this message { int skip = tunnel[t].window; // track how many in-window packets are still in queue @@ -2214,11 +2219,6 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr) { uint16_t atype = ntohs(*(uint16_t *)b); LOG(4, s, t, " Proxy Auth Type %d (%s)\n", atype, ppp_auth_type(atype)); - if (atype == 2) - authtype = AUTHCHAP; - else if (atype == 3) - authtype = AUTHPAP; - break; } case 30: // Proxy Authentication Name @@ -2251,10 +2251,6 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr) { if (*p == 5 && p[1] == 6) // Magic-Number amagic = ntohl(*(uint32_t *) (p + 2)); - else if (*p == 3 && p[1] == 4 && *(uint16_t *) (p + 2) == htons(PPPPAP)) // Authentication-Protocol (PAP) - authtype = AUTHPAP; - else if (*p == 3 && p[1] == 5 && *(uint16_t *) (p + 2) == htons(PPPCHAP) && p[4] == 5) // Authentication-Protocol (CHAP) - authtype = AUTHCHAP; else if (*p == 7) // Protocol-Field-Compression aflags |= SESSIONPFC; else if (*p == 8) // Address-and-Control-Field-Compression @@ -2302,10 +2298,10 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr) controlt *c = controlnew(2); // sending SCCRP control16(c, 2, version, 1); // protocol version control32(c, 3, 3, 1); // framing - controls(c, 7, tunnel[t].hostname, 1); // host name (TBA) + controls(c, 7, hostname, 1); // host name if (chapresponse) controlb(c, 13, chapresponse, 16, 1); // Challenge response control16(c, 9, t, 1); // assigned tunnel - controladd(c, t, 0); // send the resply + controladd(c, 0, t); // send the resply } else { @@ -2353,7 +2349,7 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr) session[s].last_packet = time_now; LOG(3, s, t, "New session (%d/%d)\n", tunnel[t].far, session[s].far); control16(c, 14, s, 1); // assigned session - controladd(c, t, asession); // send the reply + controladd(c, asession, t); // send the reply strncpy(session[s].called, called, sizeof(session[s].called) - 1); strncpy(session[s].calling, calling, sizeof(session[s].calling) - 1); @@ -2376,7 +2372,7 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr) else control16(c, 1, 2, 7); // shutting down, try another - controladd(c, t, asession); // send the message + controladd(c, asession, t); // send the message } return; case 11: // ICRP @@ -2386,20 +2382,16 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr) if (amagic == 0) amagic = time_now; session[s].magic = amagic; // set magic number session[s].l2tp_flags = aflags; // set flags received - LOG(3, s, t, "Magic %X Flags %X\n", amagic, aflags); + session[s].mru = config->ppp_mru; controlnull(t); // ack - // proxy authentication type is not supported - if (!(config->radius_authtypes & authtype)) - authtype = config->radius_authprefer; - // start LCP - sendlcp(t, s, authtype); sess_local[s].lcp.restart = time_now + config->ppp_restart_time; sess_local[s].lcp.conf_sent = 1; sess_local[s].lcp.nak_sent = 0; - sess_local[s].lcp_authtype = authtype; + sess_local[s].lcp_authtype = config->radius_authprefer; session[s].ppp.lcp = RequestSent; + sendlcp(s, t); break; case 14: // CDN @@ -2427,7 +2419,7 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr) } else { // data - uint16_t prot; + uint16_t proto; LOG_HEX(5, "Receive Tunnel Data", p, l); if (l > 2 && p[0] == 0xFF && p[1] == 0x03) @@ -2443,12 +2435,12 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr) } if (*p & 1) { - prot = *p++; + proto = *p++; l--; } else { - prot = ntohs(*(uint16_t *) p); + proto = ntohs(*(uint16_t *) p); p += 2; l -= 2; } @@ -2468,43 +2460,43 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr) return; } - if (prot == PPPPAP) + if (proto == PPPPAP) { session[s].last_packet = time_now; if (!config->cluster_iam_master) { master_forward_packet(buf, len, addr->sin_addr.s_addr, addr->sin_port); return; } - processpap(t, s, p, l); + processpap(s, t, p, l); } - else if (prot == PPPCHAP) + else if (proto == PPPCHAP) { session[s].last_packet = time_now; if (!config->cluster_iam_master) { master_forward_packet(buf, len, addr->sin_addr.s_addr, addr->sin_port); return; } - processchap(t, s, p, l); + processchap(s, t, p, l); } - else if (prot == PPPLCP) + else if (proto == PPPLCP) { session[s].last_packet = time_now; if (!config->cluster_iam_master) { master_forward_packet(buf, len, addr->sin_addr.s_addr, addr->sin_port); return; } - processlcp(t, s, p, l); + processlcp(s, t, p, l); } - else if (prot == PPPIPCP) + else if (proto == PPPIPCP) { session[s].last_packet = time_now; if (!config->cluster_iam_master) { master_forward_packet(buf, len, addr->sin_addr.s_addr, addr->sin_port); return; } - processipcp(t, s, p, l); + processipcp(s, t, p, l); } - else if (prot == PPPIPV6CP) + else if (proto == PPPIPV6CP && config->ipv6_prefix.s6_addr[0]) { session[s].last_packet = time_now; if (!config->cluster_iam_master) { master_forward_packet(buf, len, addr->sin_addr.s_addr, addr->sin_port); return; } - processipv6cp(t, s, p, l); + processipv6cp(s, t, p, l); } - else if (prot == PPPCCP) + else if (proto == PPPCCP) { session[s].last_packet = time_now; if (!config->cluster_iam_master) { master_forward_packet(buf, len, addr->sin_addr.s_addr, addr->sin_port); return; } - processccp(t, s, p, l); + processccp(s, t, p, l); } - else if (prot == PPPIP) + else if (proto == PPPIP) { if (session[s].die) { @@ -2519,15 +2511,10 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr) return; } - processipin(t, s, p, l); + processipin(s, t, p, l); } - else if (prot == PPPIPV6) + else if (proto == PPPIPV6 && config->ipv6_prefix.s6_addr[0]) { - if (!config->ipv6_prefix.s6_addr[0]) - { - LOG(1, s, t, "IPv6 not configured; yet received IPv6 packet. Ignoring.\n"); - return; - } if (session[s].die) { LOG(4, s, t, "Session %d is closing. Don't process PPP packets\n", s); @@ -2541,12 +2528,40 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr) return; } - processipv6in(t, s, p, l); + processipv6in(s, t, p, l); + } + else if (session[s].ppp.lcp == Opened) + { + uint8_t buf[MAXETHER]; + uint8_t *q; + int mru = session[s].mru; + + if (!mru) mru = MAXMRU; + if (mru > sizeof(buf)) mru = sizeof(buf); + + l += 6; + if (l > mru) l = mru; + + q = makeppp(buf, sizeof(buf), 0, 0, s, t, proto); + if (!q) return; + + *q = CodeRej; + *(q + 1) = ++sess_local[s].lcp_ident; + *(uint16_t *)(q + 2) = l; + *(uint16_t *)(q + 4) = htons(proto); + memcpy(q + 6, p, l - 6); + + if (proto == PPPIPV6CP) + LOG(3, s, t, "LCP: send ProtocolRej (IPV6CP: not configured)\n"); + else + LOG(2, s, t, "LCP: sent ProtocolRej (0x%04X: unsupported)\n", proto); + + tunnelsend(buf, l + (q - buf), t); } else { - STAT(tunnel_rx_errors); - LOG(1, s, t, "Unknown PPP protocol %04X\n", prot); + LOG(2, s, t, "Unknown PPP protocol 0x%04X received in LCP %s state\n", + proto, ppp_state(session[s].ppp.lcp)); } } } @@ -2657,10 +2672,10 @@ static void regular_cleanups(double period) } } // Send hello - if (tunnel[t].state == TUNNELOPEN && tunnel[t].lastrec < TIME + 600) + if (tunnel[t].state == TUNNELOPEN && (time_now - tunnel[t].lastrec) > 60) { controlt *c = controlnew(6); // sending HELLO - controladd(c, t, 0); // send the message + controladd(c, 0, t); // send the message LOG(3, 0, t, "Sending HELLO message\n"); t_actions++; } @@ -2730,7 +2745,7 @@ static void regular_cleanups(double period) LOG(3, s, session[s].tunnel, "No ACK for LCP ConfigReq... resending\n"); sess_local[s].lcp.restart = time_now + config->ppp_restart_time; sess_local[s].lcp.conf_sent++; - sendlcp(t, s, sess_local[s].lcp_authtype); + sendlcp(s, session[s].tunnel); change_state(s, lcp, next_state); } else @@ -2761,7 +2776,7 @@ static void regular_cleanups(double period) LOG(3, s, session[s].tunnel, "No ACK for IPCP ConfigReq... resending\n"); sess_local[s].ipcp.restart = time_now + config->ppp_restart_time; sess_local[s].ipcp.conf_sent++; - sendipcp(t, s); + sendipcp(s, session[s].tunnel); change_state(s, ipcp, next_state); } else @@ -2792,7 +2807,7 @@ static void regular_cleanups(double period) LOG(3, s, session[s].tunnel, "No ACK for IPV6CP ConfigReq... resending\n"); sess_local[s].ipv6cp.restart = time_now + config->ppp_restart_time; sess_local[s].ipv6cp.conf_sent++; - sendipv6cp(t, s); + sendipv6cp(s, session[s].tunnel); change_state(s, ipv6cp, next_state); } else @@ -2820,7 +2835,7 @@ static void regular_cleanups(double period) LOG(3, s, session[s].tunnel, "No ACK for CCP ConfigReq... resending\n"); sess_local[s].ccp.restart = time_now + config->ppp_restart_time; sess_local[s].ccp.conf_sent++; - sendccp(t, s); + sendccp(s, session[s].tunnel); change_state(s, ccp, next_state); } else @@ -2845,9 +2860,9 @@ static void regular_cleanups(double period) // No data in ECHO_TIMEOUT seconds, send LCP ECHO if (session[s].ppp.phase >= Establish && (time_now - session[s].last_packet >= ECHO_TIMEOUT)) { - uint8_t b[MAXCONTROL] = {0}; + uint8_t b[MAXETHER]; - uint8_t *q = makeppp(b, sizeof(b), 0, 0, session[s].tunnel, s, PPPLCP); + uint8_t *q = makeppp(b, sizeof(b), 0, 0, s, session[s].tunnel, PPPLCP); if (!q) continue; *q = EchoReq; @@ -3481,10 +3496,12 @@ static void initdata(int optdebug, char *optconfig) config->debug = optdebug; config->num_tbfs = MAXTBFS; config->rl_rate = 28; // 28kbps + config->cluster_mcast_ttl = 1; config->cluster_master_min_adv = 1; config->ppp_restart_time = 3; config->ppp_max_configure = 10; config->ppp_max_failure = 5; + config->ppp_mru = DEFAULT_MRU; strcpy(config->random_device, RANDOMDEVICE); log_stream = stderr; @@ -4233,6 +4250,8 @@ static void update_config() setbuf(log_stream, NULL); } + if (config->ppp_mru < 0) config->ppp_mru = 0; + // Update radius config->numradiusservers = 0; for (i = 0; i < MAXRADSERVER; i++) @@ -4400,7 +4419,7 @@ static void read_config_file() update_config(); } -int sessionsetup(tunnelidt t, sessionidt s) +int sessionsetup(sessionidt s, tunnelidt t) { // A session now exists, set it up in_addr_t ip; @@ -4479,7 +4498,7 @@ int sessionsetup(tunnelidt t, sessionidt s) } sess_local[s].lcp_authtype = 0; // RADIUS authentication complete - lcp_open(t, s); // transition to Network phase and send initial IPCP + lcp_open(s, t); // transition to Network phase and send initial IPCP // Run the plugin's against this new session. {