X-Git-Url: http://git.sameswireless.fr/l2tpns.git/blobdiff_plain/7c474381d4dcc23b9fb4d3a2401971a9ef79c889..0834bba08ed4f1e507320306dc682d7e62371af5:/l2tpns.c diff --git a/l2tpns.c b/l2tpns.c index f530955..694726d 100644 --- a/l2tpns.c +++ b/l2tpns.c @@ -4,8 +4,6 @@ // 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 1.176 2011/01/20 12:48:40 bodea Exp $"; - #include #include #include @@ -14,7 +12,6 @@ char const *cvs_id_l2tpns = "$Id: l2tpns.c,v 1.176 2011/01/20 12:48:40 bodea Exp #define SYSLOG_NAMES #include #include -#include #include #include #include @@ -31,7 +28,7 @@ char const *cvs_id_l2tpns = "$Id: l2tpns.c,v 1.176 2011/01/20 12:48:40 bodea Exp #include #include #include -#include +#include #include #include #include @@ -56,11 +53,23 @@ char const *cvs_id_l2tpns = "$Id: l2tpns.c,v 1.176 2011/01/20 12:48:40 bodea Exp #include "bgp.h" #endif +#ifdef LAC +#include "l2tplac.h" +#endif + +#ifdef LAC +char * Vendor_name = "Linux L2TPNS"; +uint32_t call_serial_number = 0; +#endif + // Globals configt *config = NULL; // all configuration int nlfd = -1; // netlink socket int tunfd = -1; // tun interface file handle. (network device) int udpfd = -1; // UDP file handle +#ifdef LAC +int udplacfd = -1; // UDP LAC file handle +#endif int controlfd = -1; // Control signal handle int clifd = -1; // Socket listening for CLI connections. int daefd = -1; // Socket listening for DAE connections. @@ -70,7 +79,7 @@ int rand_fd = -1; // Random data source int cluster_sockfd = -1; // Intra-cluster communications socket. int epollfd = -1; // event polling time_t basetime = 0; // base clock -char hostname[1000] = ""; // us. +char hostname[MAXHOSTNAME] = ""; // us. static int tunidx; // ifr_ifindex of tun device int nlseqnum = 0; // netlink sequence number int min_initok_nlseqnum = 0; // minimun seq number for messages after init is ok @@ -105,6 +114,7 @@ uint32_t eth_tx = 0; static uint32_t ip_pool_size = 1; // Size of the pool of addresses used for dynamic address allocation. time_t time_now = 0; // Current time in seconds since epoch. +uint64_t time_now_ms = 0; // Current time in milliseconds since epoch. static char time_now_string[64] = {0}; // Current time as a string. static int time_changed = 0; // time_now changed char main_quit = 0; // True if we're in the process of exiting. @@ -160,6 +170,18 @@ config_descriptt config_values[] = { CONFIG("cluster_hb_timeout", cluster_hb_timeout, INT), CONFIG("cluster_master_min_adv", cluster_master_min_adv, INT), CONFIG("ipv6_prefix", ipv6_prefix, IPv6), + CONFIG("cli_bind_address", cli_bind_address, IPv4), + CONFIG("hostname", hostname, STRING), +#ifdef BGP + CONFIG("nexthop_address", nexthop_address, IPv4), + CONFIG("nexthop6_address", nexthop6_address, IPv6), +#endif + CONFIG("echo_timeout", echo_timeout, INT), + CONFIG("idle_echo_timeout", idle_echo_timeout, INT), +#ifdef LAC + CONFIG("disable_lac_func", disable_lac_func, BOOL), + CONFIG("bind_portremotelns", bind_portremotelns, SHORT), +#endif { NULL, 0, 0, 0 }, }; @@ -167,8 +189,6 @@ static char *plugin_functions[] = { NULL, "plugin_pre_auth", "plugin_post_auth", - "plugin_packet_rx", - "plugin_packet_tx", "plugin_timer", "plugin_new_session", "plugin_kill_session", @@ -200,6 +220,8 @@ struct Tstats *_statistics = NULL; struct Tringbuffer *ringbuffer = NULL; #endif +static ssize_t netlink_send(struct nlmsghdr *nh); +static void netlink_addattr(struct nlmsghdr *nh, int type, const void *data, int alen); static void cache_ipmap(in_addr_t ip, sessionidt s); static void uncache_ipmap(in_addr_t ip); static void cache_ipv6map(struct in6_addr ip, int prefixlen, sessionidt s); @@ -220,13 +242,6 @@ static tunnelidt new_tunnel(void); static void unhide_value(uint8_t *value, size_t len, uint16_t type, uint8_t *vector, size_t vec_len); static void bundleclear(bundleidt b); -// on slaves, alow BGP to withdraw cleanly before exiting -#define QUIT_DELAY 5 - -// quit actions (master) -#define QUIT_FAILOVER 1 // SIGTERM: exit when all control messages have been acked (for cluster failover) -#define QUIT_SHUTDOWN 2 // SIGQUIT: shutdown sessions/tunnels, reject new connections - // return internal time (10ths since process startup), set f if given // as a side-effect sets time_now, and time_changed static clockt now(double *f) @@ -239,6 +254,10 @@ static clockt now(double *f) time_now = t.tv_sec; time_changed++; } + + // Time in milliseconds + time_now_ms = (t.tv_sec * 1000) + (t.tv_usec/1000); + return (t.tv_sec - basetime) * 10 + t.tv_usec / 100000 + 1; } @@ -423,36 +442,55 @@ void random_data(uint8_t *buf, int len) // static void routeset(sessionidt s, in_addr_t ip, int prefixlen, in_addr_t gw, int add) { - struct rtentry r; - in_addr_t mask; + struct { + struct nlmsghdr nh; + struct rtmsg rt; + char buf[32]; + } req; int i; + in_addr_t n_ip; if (!prefixlen) prefixlen = 32; - mask = 0xffffffff << (32 - prefixlen); + ip &= 0xffffffff << (32 - prefixlen);; // Force the ip to be the first one in the route. - ip &= mask; // Force the ip to be the first one in the route. + memset(&req, 0, sizeof(req)); - memset(&r, 0, sizeof(r)); - r.rt_dev = config->tundevice; - r.rt_dst.sa_family = AF_INET; - *(uint32_t *) & (((struct sockaddr_in *) &r.rt_dst)->sin_addr.s_addr) = htonl(ip); - r.rt_gateway.sa_family = AF_INET; - *(uint32_t *) & (((struct sockaddr_in *) &r.rt_gateway)->sin_addr.s_addr) = htonl(gw); - r.rt_genmask.sa_family = AF_INET; - *(uint32_t *) & (((struct sockaddr_in *) &r.rt_genmask)->sin_addr.s_addr) = htonl(mask); - r.rt_flags = (RTF_UP | RTF_STATIC); + if (add) + { + req.nh.nlmsg_type = RTM_NEWROUTE; + req.nh.nlmsg_flags = NLM_F_REQUEST | NLM_F_CREATE | NLM_F_REPLACE; + } + else + { + req.nh.nlmsg_type = RTM_DELROUTE; + req.nh.nlmsg_flags = NLM_F_REQUEST; + } + + req.nh.nlmsg_len = NLMSG_LENGTH(sizeof(req.rt)); + + req.rt.rtm_family = AF_INET; + req.rt.rtm_dst_len = prefixlen; + req.rt.rtm_table = RT_TABLE_MAIN; + req.rt.rtm_protocol = 42; + req.rt.rtm_scope = RT_SCOPE_LINK; + req.rt.rtm_type = RTN_UNICAST; + + netlink_addattr(&req.nh, RTA_OIF, &tunidx, sizeof(int)); + n_ip = htonl(ip); + netlink_addattr(&req.nh, RTA_DST, &n_ip, sizeof(n_ip)); if (gw) - r.rt_flags |= RTF_GATEWAY; - else if (prefixlen == 32) - r.rt_flags |= RTF_HOST; + { + n_ip = htonl(gw); + netlink_addattr(&req.nh, RTA_GATEWAY, &n_ip, sizeof(n_ip)); + } - LOG(1, s, 0, "Route %s %s/%d%s%s\n", add ? "add" : "del", + LOG(1, s, session[s].tunnel, "Route %s %s/%d%s%s\n", add ? "add" : "del", fmtaddr(htonl(ip), 0), prefixlen, gw ? " via" : "", gw ? fmtaddr(htonl(gw), 2) : ""); - if (ioctl(ifrfd, add ? SIOCADDRT : SIOCDELRT, (void *) &r) < 0) - LOG(0, 0, 0, "routeset() error in ioctl: %s\n", strerror(errno)); + if (netlink_send(&req.nh) < 0) + LOG(0, 0, 0, "routeset() error in sending netlink message: %s\n", strerror(errno)); #ifdef BGP if (add) @@ -481,33 +519,61 @@ static void routeset(sessionidt s, in_addr_t ip, int prefixlen, in_addr_t gw, in void route6set(sessionidt s, struct in6_addr ip, int prefixlen, int add) { - struct in6_rtmsg rt; + struct { + struct nlmsghdr nh; + struct rtmsg rt; + char buf[64]; + } req; + int metric; char ipv6addr[INET6_ADDRSTRLEN]; - if (ifr6fd < 0) + if (!config->ipv6_prefix.s6_addr[0]) { LOG(0, 0, 0, "Asked to set IPv6 route, but IPv6 not setup.\n"); return; } - memset(&rt, 0, sizeof(rt)); + memset(&req, 0, sizeof(req)); + + if (add) + { + req.nh.nlmsg_type = RTM_NEWROUTE; + req.nh.nlmsg_flags = NLM_F_REQUEST | NLM_F_CREATE | NLM_F_REPLACE; + } + else + { + req.nh.nlmsg_type = RTM_DELROUTE; + req.nh.nlmsg_flags = NLM_F_REQUEST; + } + + req.nh.nlmsg_len = NLMSG_LENGTH(sizeof(req.rt)); + + req.rt.rtm_family = AF_INET6; + req.rt.rtm_dst_len = prefixlen; + req.rt.rtm_table = RT_TABLE_MAIN; + req.rt.rtm_protocol = 42; + req.rt.rtm_scope = RT_SCOPE_LINK; + req.rt.rtm_type = RTN_UNICAST; - memcpy(&rt.rtmsg_dst, &ip, sizeof(struct in6_addr)); - rt.rtmsg_dst_len = prefixlen; - rt.rtmsg_metric = 1; - rt.rtmsg_flags = RTF_UP; - rt.rtmsg_ifindex = tunidx; + netlink_addattr(&req.nh, RTA_OIF, &tunidx, sizeof(int)); + netlink_addattr(&req.nh, RTA_DST, &ip, sizeof(ip)); + metric = 1; + netlink_addattr(&req.nh, RTA_METRICS, &metric, sizeof(metric)); - LOG(1, 0, 0, "Route %s %s/%d\n", + LOG(1, s, session[s].tunnel, "Route %s %s/%d\n", add ? "add" : "del", inet_ntop(AF_INET6, &ip, ipv6addr, INET6_ADDRSTRLEN), prefixlen); - if (ioctl(ifr6fd, add ? SIOCADDRT : SIOCDELRT, (void *) &rt) < 0) - LOG(0, 0, 0, "route6set() error in ioctl: %s\n", - strerror(errno)); + if (netlink_send(&req.nh) < 0) + LOG(0, 0, 0, "route6set() error in sending netlink message: %s\n", strerror(errno)); - // FIXME: need to add BGP routing (RFC2858) +#ifdef BGP + if (add) + bgp_add_route6(ip, prefixlen); + else + bgp_del_route6(ip, prefixlen); +#endif /* BGP */ if (s) { @@ -580,7 +646,7 @@ static ssize_t netlink_recv(void *buf, ssize_t len) } /* adapted from iproute2 */ -void netlink_addattr(struct nlmsghdr *nh, int type, const void *data, int alen) +static void netlink_addattr(struct nlmsghdr *nh, int type, const void *data, int alen) { int len = RTA_LENGTH(alen); struct rtattr *rta; @@ -606,7 +672,6 @@ static char *tun_nl_phase_msg[] = { // Set up TUN interface static void inittun(void) { - struct ifinfomsg ifinfo; struct ifreq ifr; memset(&ifr, 0, sizeof(ifr)); @@ -630,43 +695,13 @@ static void inittun(void) assert(strlen(ifr.ifr_name) < sizeof(config->tundevice) - 1); strncpy(config->tundevice, ifr.ifr_name, sizeof(config->tundevice)); + tunidx = if_nametoindex(config->tundevice); + if (tunidx == 0) { - // get the interface index - struct { - struct nlmsghdr nh; - struct ifinfomsg ifinfo __attribute__ ((aligned(NLMSG_ALIGNTO))); - struct rtattr ifname_rta __attribute__ ((aligned(RTA_ALIGNTO))); - char ifname[IFNAMSIZ]; - } req; - char buf[4096]; - ssize_t len; - struct nlmsghdr *resp_nh; - - req.nh.nlmsg_type = RTM_GETLINK; - req.nh.nlmsg_flags = NLM_F_REQUEST; - req.nh.nlmsg_len = NLMSG_LENGTH(sizeof(req.ifinfo)); - - req.ifinfo.ifi_family = AF_UNSPEC; // as the man says - - netlink_addattr(&req.nh, IFLA_IFNAME, config->tundevice, strlen(config->tundevice)+1); - - if(netlink_send(&req.nh) < 0 || (len = netlink_recv(buf, sizeof(buf))) < 0) - { - LOG(0, 0, 0, "Error getting tun ifindex: %s\n", strerror(errno)); - exit(1); - } - - resp_nh = (struct nlmsghdr *)buf; - if (!NLMSG_OK (resp_nh, len)) - { - LOG(0, 0, 0, "Malformed answer getting tun ifindex %ld\n", len); - exit(1); - } - - memcpy(&ifinfo, NLMSG_DATA(resp_nh), sizeof(ifinfo)); - // got index - tunidx = ifinfo.ifi_index; + LOG(0, 0, 0, "Can't get tun interface index\n"); + exit(1); } + { struct { // interface setting @@ -674,19 +709,20 @@ static void inittun(void) union { struct ifinfomsg ifinfo; struct ifaddrmsg ifaddr; - } ifmsg __attribute__ ((aligned(NLMSG_ALIGNTO))); + } ifmsg; char rtdata[32]; // 32 should be enough } req; uint32_t txqlen, mtu; - struct in_addr ip; + in_addr_t ip; memset(&req, 0, sizeof(req)); - req.nh.nlmsg_type = RTM_SETLINK; + req.nh.nlmsg_type = RTM_NEWLINK; req.nh.nlmsg_flags = NLM_F_REQUEST | NLM_F_MULTI; req.nh.nlmsg_len = NLMSG_LENGTH(sizeof(req.ifmsg.ifinfo)); - req.ifmsg.ifinfo = ifinfo; + req.ifmsg.ifinfo.ifi_family = AF_UNSPEC; + req.ifmsg.ifinfo.ifi_index = tunidx; req.ifmsg.ifinfo.ifi_flags |= IFF_UP; // set interface up req.ifmsg.ifinfo.ifi_change = IFF_UP; // only change this flag @@ -703,17 +739,18 @@ static void inittun(void) memset(&req, 0, sizeof(req)); req.nh.nlmsg_type = RTM_NEWADDR; - req.nh.nlmsg_flags = NLM_F_REQUEST | NLM_F_CREATE | NLM_F_MULTI; + req.nh.nlmsg_flags = NLM_F_REQUEST | NLM_F_CREATE | NLM_F_REPLACE | NLM_F_MULTI; req.nh.nlmsg_len = NLMSG_LENGTH(sizeof(req.ifmsg.ifaddr)); req.ifmsg.ifaddr.ifa_family = AF_INET; req.ifmsg.ifaddr.ifa_prefixlen = 32; - req.ifmsg.ifaddr.ifa_index = ifinfo.ifi_index; + req.ifmsg.ifaddr.ifa_scope = RT_SCOPE_UNIVERSE; + req.ifmsg.ifaddr.ifa_index = tunidx; if (config->bind_address) - ip.s_addr = config->bind_address; + ip = config->bind_address; else - ip.s_addr = 0x01010101, // 1.1.1.1 + ip = 0x01010101; // 1.1.1.1 netlink_addattr(&req.nh, IFA_LOCAL, &ip, sizeof(ip)); if (netlink_send(&req.nh) < 0) @@ -726,13 +763,13 @@ static void inittun(void) memset(&req, 0, sizeof(req)); req.nh.nlmsg_type = RTM_NEWADDR; - req.nh.nlmsg_flags = NLM_F_REQUEST | NLM_F_CREATE | NLM_F_MULTI; + req.nh.nlmsg_flags = NLM_F_REQUEST | NLM_F_CREATE | NLM_F_REPLACE | NLM_F_MULTI; req.nh.nlmsg_len = NLMSG_LENGTH(sizeof(req.ifmsg.ifaddr)); req.ifmsg.ifaddr.ifa_family = AF_INET6; req.ifmsg.ifaddr.ifa_prefixlen = 64; req.ifmsg.ifaddr.ifa_scope = RT_SCOPE_LINK; - req.ifmsg.ifaddr.ifa_index = ifinfo.ifi_index; + req.ifmsg.ifaddr.ifa_index = tunidx; // Link local address is FE80::1 memset(&ip6, 0, sizeof(ip6)); @@ -747,13 +784,13 @@ static void inittun(void) memset(&req, 0, sizeof(req)); req.nh.nlmsg_type = RTM_NEWADDR; - req.nh.nlmsg_flags = NLM_F_REQUEST | NLM_F_CREATE | NLM_F_MULTI; + req.nh.nlmsg_flags = NLM_F_REQUEST | NLM_F_CREATE | NLM_F_REPLACE | NLM_F_MULTI; req.nh.nlmsg_len = NLMSG_LENGTH(sizeof(req.ifmsg.ifaddr)); req.ifmsg.ifaddr.ifa_family = AF_INET6; req.ifmsg.ifaddr.ifa_prefixlen = 64; req.ifmsg.ifaddr.ifa_scope = RT_SCOPE_UNIVERSE; - req.ifmsg.ifaddr.ifa_index = ifinfo.ifi_index; + req.ifmsg.ifaddr.ifa_index = tunidx; // Global address is prefix::1 ip6 = config->ipv6_prefix; @@ -836,6 +873,24 @@ static void initudp(void) exit(1); } +#ifdef LAC + // Tunnel to Remote LNS + memset(&addr, 0, sizeof(addr)); + addr.sin_family = AF_INET; + addr.sin_port = htons(config->bind_portremotelns); + udplacfd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP); + setsockopt(udplacfd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)); + { + int flags = fcntl(udplacfd, F_GETFL, 0); + fcntl(udplacfd, F_SETFL, flags | O_NONBLOCK); + } + if (bind(udplacfd, (struct sockaddr *) &addr, sizeof(addr)) < 0) + { + LOG(0, 0, 0, "Error in UDP REMOTE LNS bind: %s\n", strerror(errno)); + exit(1); + } +#endif + // Intercept snoopfd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP); } @@ -1156,8 +1211,11 @@ void tunnelsend(uint8_t * buf, uint16_t l, tunnelidt t) LOG(3, 0, t, "Control message resend try %d\n", tunnel[t].try); } } - +#ifdef LAC + if (sendto((tunnel[t].isremotelns?udplacfd:udpfd), buf, l, 0, (void *) &addr, sizeof(addr)) < 0) +#else if (sendto(udpfd, buf, l, 0, (void *) &addr, sizeof(addr)) < 0) +#endif { LOG(0, ntohs((*(uint16_t *) (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)); @@ -1304,7 +1362,8 @@ static void update_session_out_stat(sessionidt s, sessiont *sp, int len) // process outgoing (to tunnel) IP // -static void processipout(uint8_t *buf, int len) +// (i.e. this routine writes to data[-8]). +void processipout(uint8_t *buf, int len) { sessionidt s; sessiont *sp; @@ -1441,75 +1500,123 @@ static void processipout(uint8_t *buf, int len) return; } - // Add on L2TP header - { - bundleidt bid = 0; - if(session[s].bundle != 0 && bundle[session[s].bundle].num_of_links > 1) - { - bid = session[s].bundle; - s = bundle[bid].members[bundle[bid].current_ses = ++bundle[bid].current_ses % bundle[bid].num_of_links]; - t = session[s].tunnel; - sp = &session[s]; - LOG(4, s, t, "MPPP: (1)Session number becomes: %d\n", s); - if(len > MINFRAGLEN) - { - // Partition the packet to "bundle[b].num_of_links" fragments - bundlet *b = &bundle[bid]; - uint32_t num_of_links = b->num_of_links; - uint32_t fraglen = len / num_of_links; - fraglen = (fraglen > session[s].mru ? session[s].mru : fraglen); - uint32_t last_fraglen = fraglen + len % num_of_links; - last_fraglen = (last_fraglen > session[s].mru ? len % num_of_links : last_fraglen); + if(session[s].bundle != 0 && bundle[session[s].bundle].num_of_links > 1) + { + + if (!config->cluster_iam_master) + { + // The MPPP packets must be managed by the Master. + master_forward_mppp_packet(s, data, size); + return; + } + + // Add on L2TP header + sessionidt members[MAXBUNDLESES]; + bundleidt bid = session[s].bundle; + bundlet *b = &bundle[bid]; + uint32_t num_of_links, nb_opened; + int i; + + num_of_links = b->num_of_links; + nb_opened = 0; + for (i = 0;i < num_of_links;i++) + { + s = b->members[i]; + if (session[s].ppp.lcp == Opened) + { + members[nb_opened] = s; + nb_opened++; + } + } + + if (nb_opened < 1) + { + LOG(3, s, t, "MPPP: PROCESSIPOUT ERROR, no session opened in bundle:%d\n", bid); + return; + } + + num_of_links = nb_opened; + b->current_ses = (b->current_ses + 1) % num_of_links; + s = members[b->current_ses]; + t = session[s].tunnel; + sp = &session[s]; + LOG(4, s, t, "MPPP: (1)Session number becomes: %d\n", s); + + if (num_of_links > 1) + { + if(len > MINFRAGLEN) + { + //for rotate traffic among the member links + uint32_t divisor = num_of_links; + if (divisor > 2) + divisor = divisor/2 + (divisor & 1); + + // Partition the packet to "num_of_links" fragments + uint32_t fraglen = len / divisor; + uint32_t last_fraglen = fraglen + len % divisor; uint32_t remain = len; // send the first packet - uint8_t *p = makeppp(fragbuf, sizeof(fragbuf), buf, fraglen, s, t, PPPIP, 0, bid, MP_BEGIN); - if (!p) return; - tunnelsend(fragbuf, fraglen + (p-fragbuf), t); // send it... + uint8_t *p = makeppp(fragbuf, sizeof(fragbuf), buf, fraglen, s, t, PPPIP, 0, bid, MP_BEGIN); + if (!p) return; + tunnelsend(fragbuf, fraglen + (p-fragbuf), t); // send it... + // statistics update_session_out_stat(s, sp, fraglen); + remain -= fraglen; while (remain > last_fraglen) - { - s = b->members[b->current_ses = ++b->current_ses % num_of_links]; + { + b->current_ses = (b->current_ses + 1) % num_of_links; + s = members[b->current_ses]; t = session[s].tunnel; sp = &session[s]; - LOG(4, s, t, "MPPP: (2)Session number becomes: %d\n", s); - p = makeppp(fragbuf, sizeof(fragbuf), buf+(len - remain), fraglen, s, t, PPPIP, 0, bid, 0); - if (!p) return; - tunnelsend(fragbuf, fraglen + (p-fragbuf), t); // send it... + LOG(4, s, t, "MPPP: (2)Session number becomes: %d\n", s); + p = makeppp(fragbuf, sizeof(fragbuf), buf+(len - remain), fraglen, s, t, PPPIP, 0, bid, 0); + if (!p) return; + tunnelsend(fragbuf, fraglen + (p-fragbuf), t); // send it... update_session_out_stat(s, sp, fraglen); remain -= fraglen; } // send the last fragment - s = b->members[b->current_ses = ++b->current_ses % num_of_links]; + b->current_ses = (b->current_ses + 1) % num_of_links; + s = members[b->current_ses]; t = session[s].tunnel; sp = &session[s]; - LOG(4, s, t, "MPPP: (2)Session number becomes: %d\n", s); - p = makeppp(fragbuf, sizeof(fragbuf), buf+(len - remain), remain, s, t, PPPIP, 0, bid, MP_END); - if (!p) return; - tunnelsend(fragbuf, remain + (p-fragbuf), t); // send it... + LOG(4, s, t, "MPPP: (2)Session number becomes: %d\n", s); + p = makeppp(fragbuf, sizeof(fragbuf), buf+(len - remain), remain, s, t, PPPIP, 0, bid, MP_END); + if (!p) return; + tunnelsend(fragbuf, remain + (p-fragbuf), t); // send it... update_session_out_stat(s, sp, remain); if (remain != last_fraglen) LOG(3, s, t, "PROCESSIPOUT ERROR REMAIN != LAST_FRAGLEN, %d != %d\n", remain, last_fraglen); - } - else { - // Send it as one frame - uint8_t *p = makeppp(fragbuf, sizeof(fragbuf), buf, len, s, t, PPPIP, 0, bid, MP_BOTH_BITS); - if (!p) return; - tunnelsend(fragbuf, len + (p-fragbuf), t); // send it... + } + else + { + // Send it as one frame + uint8_t *p = makeppp(fragbuf, sizeof(fragbuf), buf, len, s, t, PPPIP, 0, bid, MP_BOTH_BITS); + if (!p) return; + tunnelsend(fragbuf, len + (p-fragbuf), t); // send it... LOG(4, s, t, "MPPP: packet sent as one frame\n"); update_session_out_stat(s, sp, len); - } - } - else - { - uint8_t *p = makeppp(fragbuf, sizeof(fragbuf), buf, len, s, t, PPPIP, 0, 0, 0); - if (!p) return; - tunnelsend(fragbuf, len + (p-fragbuf), t); // send it... + } + } + else + { + // Send it as one frame (NO MPPP Frame) + uint8_t *p = makeppp(fragbuf, sizeof(fragbuf), buf, len, s, t, PPPIP, 0, 0, 0); + if (!p) return; + tunnelsend(fragbuf, len + (p-fragbuf), t); // send it... update_session_out_stat(s, sp, len); - } - } + } + } + else + { + uint8_t *p = makeppp(fragbuf, sizeof(fragbuf), buf, len, s, t, PPPIP, 0, 0, 0); + if (!p) return; + tunnelsend(fragbuf, len + (p-fragbuf), t); // send it... + update_session_out_stat(s, sp, len); + } // Snooping this session, send it to intercept box if (sp->snoop_ip && sp->snoop_port) @@ -1589,7 +1696,10 @@ static void processipv6out(uint8_t * buf, int len) if (session[s].bundle && bundle[session[s].bundle].num_of_links > 1) { bundleidt bid = session[s].bundle; - s = bundle[bid].members[bundle[bid].current_ses = ++bundle[bid].current_ses % bundle[bid].num_of_links]; + bundlet *b = &bundle[bid]; + + b->current_ses = (b->current_ses + 1) % b->num_of_links; + s = b->members[b->current_ses]; LOG(3, s, session[s].tunnel, "MPPP: Session number becomes: %u\n", s); } t = session[s].tunnel; @@ -1644,7 +1754,6 @@ static void send_ipout(sessionidt s, uint8_t *buf, int len) { sessiont *sp; tunnelidt t; - in_addr_t ip; uint8_t b[MAXETHER + 20]; @@ -1658,8 +1767,6 @@ static void send_ipout(sessionidt s, uint8_t *buf, int len) buf += 4; len -= 4; - ip = *(in_addr_t *)(buf + 16); - if (!session[s].ip) return; @@ -1692,10 +1799,10 @@ static void send_ipout(sessionidt s, uint8_t *buf, int len) static void control16(controlt * c, uint16_t avp, uint16_t val, uint8_t m) { uint16_t l = (m ? 0x8008 : 0x0008); - *(uint16_t *) (c->buf + c->length + 0) = htons(l); - *(uint16_t *) (c->buf + c->length + 2) = htons(0); - *(uint16_t *) (c->buf + c->length + 4) = htons(avp); - *(uint16_t *) (c->buf + c->length + 6) = htons(val); + c->buf16[c->length/2 + 0] = htons(l); + c->buf16[c->length/2 + 1] = htons(0); + c->buf16[c->length/2 + 2] = htons(avp); + c->buf16[c->length/2 + 3] = htons(val); c->length += 8; } @@ -1703,10 +1810,10 @@ static void control16(controlt * c, uint16_t avp, uint16_t val, uint8_t m) static void control32(controlt * c, uint16_t avp, uint32_t val, uint8_t m) { uint16_t l = (m ? 0x800A : 0x000A); - *(uint16_t *) (c->buf + c->length + 0) = htons(l); - *(uint16_t *) (c->buf + c->length + 2) = htons(0); - *(uint16_t *) (c->buf + c->length + 4) = htons(avp); - *(uint32_t *) (c->buf + c->length + 6) = htonl(val); + c->buf16[c->length/2 + 0] = htons(l); + c->buf16[c->length/2 + 1] = htons(0); + c->buf16[c->length/2 + 2] = htons(avp); + *(uint32_t *) &c->buf[c->length + 6] = htonl(val); c->length += 10; } @@ -1714,10 +1821,10 @@ static void control32(controlt * c, uint16_t avp, uint32_t val, uint8_t m) static void controls(controlt * c, uint16_t avp, char *val, uint8_t m) { uint16_t l = ((m ? 0x8000 : 0) + strlen(val) + 6); - *(uint16_t *) (c->buf + c->length + 0) = htons(l); - *(uint16_t *) (c->buf + c->length + 2) = htons(0); - *(uint16_t *) (c->buf + c->length + 4) = htons(avp); - memcpy(c->buf + c->length + 6, val, strlen(val)); + c->buf16[c->length/2 + 0] = htons(l); + c->buf16[c->length/2 + 1] = htons(0); + c->buf16[c->length/2 + 2] = htons(avp); + memcpy(&c->buf[c->length + 6], val, strlen(val)); c->length += 6 + strlen(val); } @@ -1725,10 +1832,10 @@ static void controls(controlt * c, uint16_t avp, char *val, uint8_t m) static void controlb(controlt * c, uint16_t avp, uint8_t *val, unsigned int len, uint8_t m) { uint16_t l = ((m ? 0x8000 : 0) + len + 6); - *(uint16_t *) (c->buf + c->length + 0) = htons(l); - *(uint16_t *) (c->buf + c->length + 2) = htons(0); - *(uint16_t *) (c->buf + c->length + 4) = htons(avp); - memcpy(c->buf + c->length + 6, val, len); + c->buf16[c->length/2 + 0] = htons(l); + c->buf16[c->length/2 + 1] = htons(0); + c->buf16[c->length/2 + 2] = htons(avp); + memcpy(&c->buf[c->length + 6], val, len); c->length += 6 + len; } @@ -1745,7 +1852,7 @@ static controlt *controlnew(uint16_t mtype) } assert(c); c->next = 0; - *(uint16_t *) (c->buf + 0) = htons(0xC802); // flags/ver + c->buf16[0] = htons(0xC802); // flags/ver c->length = 12; control16(c, 0, mtype, 1); return c; @@ -1755,26 +1862,26 @@ static controlt *controlnew(uint16_t mtype) // (ZLB send). static void controlnull(tunnelidt t) { - uint8_t buf[12]; + uint16_t buf[6]; if (tunnel[t].controlc) // Messages queued; They will carry the ack. return; - *(uint16_t *) (buf + 0) = htons(0xC802); // flags/ver - *(uint16_t *) (buf + 2) = htons(12); // length - *(uint16_t *) (buf + 4) = htons(tunnel[t].far); // tunnel - *(uint16_t *) (buf + 6) = htons(0); // session - *(uint16_t *) (buf + 8) = htons(tunnel[t].ns); // sequence - *(uint16_t *) (buf + 10) = htons(tunnel[t].nr); // sequence - tunnelsend(buf, 12, t); + buf[0] = htons(0xC802); // flags/ver + buf[1] = htons(12); // length + buf[2] = htons(tunnel[t].far); // tunnel + buf[3] = htons(0); // session + buf[4] = htons(tunnel[t].ns); // sequence + buf[5] = htons(tunnel[t].nr); // sequence + tunnelsend((uint8_t *)buf, 12, t); } // add a control message to a tunnel, and send if within window 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 - *(uint16_t *) (c->buf + 6) = htons(far); // session - *(uint16_t *) (c->buf + 8) = htons(tunnel[t].ns); // sequence + c->buf16[1] = htons(c->length); // length + c->buf16[2] = htons(tunnel[t].far); // tunnel + c->buf16[3] = htons(far); // session + c->buf16[4] = htons(tunnel[t].ns); // sequence tunnel[t].ns++; // advance sequence // link in message in to queue if (tunnel[t].controlc) @@ -1950,36 +2057,67 @@ void sessionshutdown(sessionidt s, char const *reason, int cdn_result, int cdn_e if (session[s].ppp.ipv6cp == Opened && session[s].ipv6prefixlen && del_routes) route6set(s, session[s].ipv6route, session[s].ipv6prefixlen, 0); - if (b) + if (b) { - // This session was part of a bundle - bundle[b].num_of_links--; - LOG(3, s, 0, "MPPP: Dropping member link: %d from bundle %d\n",s,b); - if(bundle[b].num_of_links == 0) + // This session was part of a bundle + bundle[b].num_of_links--; + LOG(3, s, session[s].tunnel, "MPPP: Dropping member link: %d from bundle %d\n",s,b); + if(bundle[b].num_of_links == 0) { - bundleclear(b); - LOG(3, s, 0, "MPPP: Kill bundle: %d (No remaing member links)\n",b); - } - else + bundleclear(b); + LOG(3, s, session[s].tunnel, "MPPP: Kill bundle: %d (No remaing member links)\n",b); + } + else { - // Adjust the members array to accomodate the new change - uint8_t mem_num = 0; - // It should be here num_of_links instead of num_of_links-1 (previous instruction "num_of_links--") - if(bundle[b].members[bundle[b].num_of_links] != s) + // Adjust the members array to accomodate the new change + uint8_t mem_num = 0; + // It should be here num_of_links instead of num_of_links-1 (previous instruction "num_of_links--") + if(bundle[b].members[bundle[b].num_of_links] != s) { - uint8_t ml; - for(ml = 0; ml sizeof(buf)) m = sizeof(buf) - 4; - memcpy(buf+4, msg, m); + memcpy(buf+2, msg, m); l += m; } - controlb(c, 1, buf, l, 1); + controlb(c, 1, (uint8_t *)buf, l, 1); } else control16(c, 1, result, 1); @@ -2518,7 +2668,7 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr) case 0: // message type message = ntohs(*(uint16_t *) b); mandatory = flags & 0x80; - LOG(4, s, t, " Message type = %u (%s)\n", *b, l2tp_code(message)); + LOG(4, s, t, " Message type = %u (%s)\n", message, l2tp_code(message)); break; case 1: // result code { @@ -2613,6 +2763,15 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr) } break; case 13: // Response +#ifdef LAC + if (tunnel[t].isremotelns) + { + chapresponse = calloc(17, 1); + memcpy(chapresponse, b, (n < 17) ? n : 16); + LOG(3, s, t, "received challenge response from REMOTE LNS\n"); + } + else +#endif /* LAC */ // Why did they send a response? We never challenge. LOG(2, s, t, " received unexpected challenge response\n"); break; @@ -2838,8 +2997,10 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr) { case 1: // SCCRQ - Start Control Connection Request tunnel[t].state = TUNNELOPENING; + LOG(3, s, t, "Received SCCRQ\n"); if (main_quit != QUIT_SHUTDOWN) { + LOG(3, s, t, "sending SCCRP\n"); controlt *c = controlnew(2); // sending SCCRP control16(c, 2, version, 1); // protocol version control32(c, 3, 3, 1); // framing @@ -2856,13 +3017,47 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr) case 2: // SCCRP tunnel[t].state = TUNNELOPEN; tunnel[t].lastrec = time_now; +#ifdef LAC + LOG(3, s, t, "Received SCCRP\n"); + if (main_quit != QUIT_SHUTDOWN) + { + if (tunnel[t].isremotelns && chapresponse) + { + hasht hash; + + lac_calc_rlns_auth(t, 2, hash); // id = 2 (SCCRP) + // check authenticator + if (memcmp(hash, chapresponse, 16) == 0) + { + LOG(3, s, t, "sending SCCCN to REMOTE LNS\n"); + controlt *c = controlnew(3); // sending SCCCN + controls(c, 7, hostname, 1); // host name + controls(c, 8, Vendor_name, 1); // Vendor name + control16(c, 2, version, 1); // protocol version + control32(c, 3, 3, 1); // framing Capabilities + control16(c, 9, t, 1); // assigned tunnel + controladd(c, 0, t); // send + } + else + { + tunnelshutdown(t, "Bad chap response from REMOTE LNS", 4, 0, 0); + } + } + } + else + { + tunnelshutdown(t, "Shutting down", 6, 0, 0); + } +#endif /* LAC */ break; case 3: // SCCN + LOG(3, s, t, "Received SCCN\n"); tunnel[t].state = TUNNELOPEN; tunnel[t].lastrec = time_now; controlnull(t); // ack break; case 4: // StopCCN + LOG(3, s, t, "Received StopCCN\n"); controlnull(t); // ack tunnelshutdown(t, "Stopped", 0, 0, 0); // Shut down cleanly break; @@ -2871,18 +3066,24 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr) break; case 7: // OCRQ // TBA + LOG(3, s, t, "Received OCRQ\n"); break; case 8: // OCRO // TBA + LOG(3, s, t, "Received OCRO\n"); break; case 9: // OCCN // TBA + LOG(3, s, t, "Received OCCN\n"); break; case 10: // ICRQ + LOG(3, s, t, "Received ICRQ\n"); if (sessionfree && main_quit != QUIT_SHUTDOWN) { controlt *c = controlnew(11); // ICRP + LOG(3, s, t, "Sending ICRP\n"); + s = sessionfree; sessionfree = session[s].next; memset(&session[s], 0, sizeof(session[s])); @@ -2910,6 +3111,7 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr) { controlt *c = controlnew(14); // CDN + LOG(3, s, t, "Sending CDN\n"); if (!sessionfree) { STAT(session_overflow); @@ -2923,9 +3125,26 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr) } return; case 11: // ICRP - // TBA +#ifdef LAC + LOG(3, s, t, "Received ICRP\n"); + if (session[s].forwardtosession) + { + controlt *c = controlnew(12); // ICCN + + session[s].opened = time_now; + session[s].tunnel = t; + session[s].far = asession; + session[s].last_packet = session[s].last_data = time_now; + + control32(c, 19, 1, 1); // Framing Type + control32(c, 24, 10000000, 1); // Tx Connect Speed + controladd(c, asession, t); // send the message + LOG(3, s, t, "Sending ICCN\n"); + } +#endif /* LAC */ break; case 12: // ICCN + LOG(3, s, t, "Received ICCN\n"); if (amagic == 0) amagic = time_now; session[s].magic = amagic; // set magic number session[s].flags = aflags; // set flags received @@ -2938,13 +3157,14 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr) // Set multilink options before sending initial LCP packet sess_local[s].mp_mrru = 1614; - sess_local[s].mp_epdis = config->bind_address ? config->bind_address : my_address; + sess_local[s].mp_epdis = ntohl(config->bind_address ? config->bind_address : my_address); sendlcp(s, t); change_state(s, lcp, RequestSent); break; case 14: // CDN + LOG(3, s, t, "Received CDN\n"); controlnull(t); // ack sessionshutdown(s, disc_reason, CDN_NONE, disc_cause); break; @@ -2995,6 +3215,16 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr) l -= 2; } +#ifdef LAC + if (session[s].forwardtosession) + { + LOG(5, s, t, "Forwarding data session to session %u\n", session[s].forwardtosession); + // Forward to LAC or Remote LNS session + lac_session_forward(buf, len, s, proto); + return; + } +#endif /* LAC */ + if (s && !session[s].opened) // Is something wrong?? { if (!config->cluster_iam_master) @@ -3004,7 +3234,6 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr) return; } - LOG(1, s, t, "UDP packet contains session which is not opened. Dropping packet.\n"); STAT(tunnel_rx_errors); return; @@ -3072,8 +3301,9 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr) } session[s].last_packet = session[s].last_data = time_now; - if (session[s].walled_garden && !config->cluster_iam_master) + if (!config->cluster_iam_master) { + // The fragments reconstruction is managed by the Master. master_forward_packet(buf, len, addr->sin_addr.s_addr, addr->sin_port); return; } @@ -3112,6 +3342,7 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr) } // read and process packet on tun +// (i.e. this routine writes to buf[-8]). static void processtun(uint8_t * buf, int len) { LOG_HEX(5, "Receive TUN Data", buf, len); @@ -3385,8 +3616,8 @@ static void regular_cleanups(double period) } } - // Drop sessions who have not responded within IDLE_TIMEOUT seconds - if (session[s].last_packet && (time_now - session[s].last_packet >= IDLE_TIMEOUT)) + // Drop sessions who have not responded within IDLE_ECHO_TIMEOUT seconds + if (session[s].last_packet && (time_now - session[s].last_packet >= config->idle_echo_timeout)) { sessionshutdown(s, "No response to LCP ECHO requests.", CDN_ADMIN_DISC, TERM_LOST_SERVICE); STAT(session_timeout); @@ -3395,7 +3626,7 @@ 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) && + if (session[s].ppp.phase >= Establish && (time_now - session[s].last_packet >= config->echo_timeout) && (time_now - sess_local[s].last_echo >= ECHO_TIMEOUT)) { uint8_t b[MAXETHER]; @@ -3566,35 +3797,36 @@ static int still_busy(void) static clockt last_talked = 0; static clockt start_busy_wait = 0; - if (!config->cluster_iam_master) - { #ifdef BGP - static time_t stopped_bgp = 0; - if (bgp_configured) + static time_t stopped_bgp = 0; + if (bgp_configured) + { + if (!stopped_bgp) { - if (!stopped_bgp) - { - LOG(1, 0, 0, "Shutting down in %d seconds, stopping BGP...\n", QUIT_DELAY); + LOG(1, 0, 0, "Shutting down in %d seconds, stopping BGP...\n", QUIT_DELAY); - for (i = 0; i < BGP_NUM_PEERS; i++) - if (bgp_peers[i].state == Established) - bgp_stop(&bgp_peers[i]); + for (i = 0; i < BGP_NUM_PEERS; i++) + if (bgp_peers[i].state == Established) + bgp_stop(&bgp_peers[i]); - stopped_bgp = time_now; + stopped_bgp = time_now; + if (!config->cluster_iam_master) + { // we don't want to become master cluster_send_ping(0); return 1; } - - if (time_now < (stopped_bgp + QUIT_DELAY)) - return 1; } + + if (!config->cluster_iam_master && time_now < (stopped_bgp + QUIT_DELAY)) + return 1; + } #endif /* BGP */ + if (!config->cluster_iam_master) return 0; - } if (main_quit == QUIT_SHUTDOWN) { @@ -3660,8 +3892,13 @@ static int still_busy(void) # include "fake_epoll.h" #endif +#ifdef LAC +// the base set of fds polled: cli, cluster, tun, udp, control, dae, netlink, udplac +#define BASE_FDS 8 +#else // the base set of fds polled: cli, cluster, tun, udp, control, dae, netlink #define BASE_FDS 7 +#endif // additional polled fds #ifdef BGP @@ -3675,6 +3912,8 @@ static void mainloop(void) { int i; uint8_t buf[65536]; + uint8_t *p = buf + 8; // for the hearder of the forwarded MPPP packet (see C_MPPP_FORWARD) + int size_bufp = sizeof(buf) - 8; clockt next_cluster_ping = 0; // send initial ping immediately struct epoll_event events[BASE_FDS + RADIUS_FDS + EXTRA_FDS]; int maxevent = sizeof(events)/sizeof(*events); @@ -3685,8 +3924,13 @@ static void mainloop(void) exit(1); } +#ifdef LAC + LOG(4, 0, 0, "Beginning of main loop. clifd=%d, cluster_sockfd=%d, tunfd=%d, udpfd=%d, controlfd=%d, daefd=%d, nlfd=%d , udplacfd=%d\n", + clifd, cluster_sockfd, tunfd, udpfd, controlfd, daefd, nlfd, udplacfd); +#else LOG(4, 0, 0, "Beginning of main loop. clifd=%d, cluster_sockfd=%d, tunfd=%d, udpfd=%d, controlfd=%d, daefd=%d, nlfd=%d\n", clifd, cluster_sockfd, tunfd, udpfd, controlfd, daefd, nlfd); +#endif /* setup our fds to poll for input */ { @@ -3726,6 +3970,12 @@ static void mainloop(void) d[i].type = FD_TYPE_NETLINK; e.data.ptr = &d[i++]; epoll_ctl(epollfd, EPOLL_CTL_ADD, nlfd, &e); + +#ifdef LAC + d[i].type = FD_TYPE_UDPLAC; + e.data.ptr = &d[i++]; + epoll_ctl(epollfd, EPOLL_CTL_ADD, udplacfd, &e); +#endif } #ifdef BGP @@ -3739,7 +3989,8 @@ static void mainloop(void) if (config->neighbour[i].name[0]) bgp_start(&bgp_peers[i], config->neighbour[i].name, config->neighbour[i].as, config->neighbour[i].keepalive, - config->neighbour[i].hold, 0); /* 0 = routing disabled */ + config->neighbour[i].hold, config->neighbour[i].update_source, + 0); /* 0 = routing disabled */ } #endif /* BGP */ @@ -3787,6 +4038,10 @@ static void mainloop(void) socklen_t alen; int c, s; int udp_ready = 0; +#ifdef LAC + int udplac_ready = 0; + int udplac_pkts = 0; +#endif int tun_ready = 0; int cluster_ready = 0; int udp_pkts = 0; @@ -3824,7 +4079,9 @@ static void mainloop(void) case FD_TYPE_CLUSTER: cluster_ready++; break; case FD_TYPE_TUN: tun_ready++; break; case FD_TYPE_UDP: udp_ready++; break; - +#ifdef LAC + case FD_TYPE_UDPLAC: udplac_ready++; break; +#endif case FD_TYPE_CONTROL: // nsctl commands alen = sizeof(addr); s = recvfromto(controlfd, buf, sizeof(buf), MSG_WAITALL, (struct sockaddr *) &addr, &alen, &local); @@ -3914,13 +4171,31 @@ static void mainloop(void) n--; } } +#ifdef LAC + // L2TP REMOTE LNS + if (udplac_ready) + { + alen = sizeof(addr); + if ((s = recvfrom(udplacfd, buf, sizeof(buf), 0, (void *) &addr, &alen)) > 0) + { + if (!config->disable_lac_func) + processudp(buf, s, &addr); + udplac_pkts++; + } + else + { + udplac_ready = 0; + n--; + } + } +#endif // incoming IP if (tun_ready) { - if ((s = read(tunfd, buf, sizeof(buf))) > 0) + if ((s = read(tunfd, p, size_bufp)) > 0) { - processtun(buf, s); + processtun(p, s); tun_pkts++; } else @@ -3952,13 +4227,22 @@ static void mainloop(void) if (c >= config->multi_read_count) { +#ifdef LAC + LOG(3, 0, 0, "Reached multi_read_count (%d); processed %d udp, %d tun and %d cluster %d rmlns packets\n", + config->multi_read_count, udp_pkts, tun_pkts, cluster_pkts, udplac_pkts); +#else LOG(3, 0, 0, "Reached multi_read_count (%d); processed %d udp, %d tun and %d cluster packets\n", config->multi_read_count, udp_pkts, tun_pkts, cluster_pkts); - +#endif STAT(multi_read_exceeded); more++; } } +#ifdef BGP + else + /* no event received, but timers could still have expired */ + bgp_process_peers_timers(); +#endif /* BGP */ if (time_changed) { @@ -4164,6 +4448,9 @@ static void initdata(int optdebug, char *optconfig) config->ppp_max_failure = 5; config->kill_timedout_sessions = 1; strcpy(config->random_device, RANDOMDEVICE); + // Set default value echo_timeout and idle_echo_timeout + config->echo_timeout = ECHO_TIMEOUT; + config->idle_echo_timeout = IDLE_ECHO_TIMEOUT; log_stream = stderr; @@ -4280,6 +4567,10 @@ static void initdata(int optdebug, char *optconfig) exit(1); } #endif /* BGP */ + +#ifdef LAC + lac_initremotelnsdata(); +#endif } static int assign_ip_address(sessionidt s) @@ -4566,7 +4857,11 @@ void snoop_send_packet(uint8_t *packet, uint16_t size, in_addr_t destination, ui static int dump_session(FILE **f, sessiont *s) { +#ifdef LAC + if (!s->opened || (!s->ip && !s->forwardtosession) || !(s->cin_delta || s->cout_delta) || !*s->user || s->walled_garden) +#else if (!s->opened || !s->ip || !(s->cin_delta || s->cout_delta) || !*s->user || s->walled_garden) +#endif return 1; if (!*f) @@ -4683,8 +4978,12 @@ int main(int argc, char *argv[]) initplugins(); initdata(optdebug, optconfig); - init_cli(hostname); + init_cli(); read_config_file(); + /* set hostname /after/ having read the config file */ + if (*config->hostname) + strcpy(hostname, config->hostname); + cli_init_complete(hostname); update_config(); init_tbf(config->num_tbfs); @@ -4969,6 +5268,11 @@ static void update_config() if (!config->radius_dae_port) config->radius_dae_port = DAEPORT; +#ifdef LAC + if(!config->bind_portremotelns) + config->bind_portremotelns = L2TPLACPORT; +#endif + // re-initialise the random number source initrandom(config->random_device); @@ -5103,18 +5407,18 @@ int sessionsetup(sessionidt s, tunnelidt t) LOG(3, s, t, "Doing session setup for session\n"); // Join a bundle if the MRRU option is accepted - if(session[s].mrru > 0 && session[s].bundle == 0) - { - LOG(3, s, t, "This session can be part of multilink bundle\n"); - if (join_bundle(s) > 0) - cluster_send_bundle(session[s].bundle); + if(session[s].mrru > 0 && session[s].bundle == 0) + { + LOG(3, s, t, "This session can be part of multilink bundle\n"); + if (join_bundle(s) > 0) + cluster_send_bundle(session[s].bundle); else { LOG(0, s, t, "MPPP: Mismaching mssf option with other sessions in bundle\n"); sessionshutdown(s, "Mismaching mssf option.", CDN_NONE, TERM_SERVICE_UNAVAILABLE); return 0; } - } + } if (!session[s].ip) { @@ -5129,7 +5433,6 @@ int sessionsetup(sessionidt s, tunnelidt t) fmtaddr(htonl(session[s].ip), 0)); } - // Make sure this is right session[s].tunnel = t; @@ -5142,13 +5445,14 @@ int sessionsetup(sessionidt s, tunnelidt t) for (i = 1; i <= config->cluster_highest_sessionid; i++) { if (i == s) continue; - if (!session[s].opened) continue; + if (!session[s].opened) break; // Allow duplicate sessions for multilink ones of the same bundle. - if (session[s].bundle && session[i].bundle && session[s].bundle == session[i].bundle) - continue; + if (session[s].bundle && session[i].bundle && session[s].bundle == session[i].bundle) continue; + if (ip == session[i].ip) { sessionkill(i, "Duplicate IP address"); + cluster_listinvert_session(s, i); continue; } @@ -5156,16 +5460,16 @@ int sessionsetup(sessionidt s, tunnelidt t) if (session[s].walled_garden || session[i].walled_garden) continue; // Guest change int found = 0; - int gu; - for (gu = 0; gu < guest_accounts_num; gu++) - { - if (!strcasecmp(user, guest_users[gu])) - { - found = 1; - break; - } - } - if (found) continue; + int gu; + for (gu = 0; gu < guest_accounts_num; gu++) + { + if (!strcasecmp(user, guest_users[gu])) + { + found = 1; + break; + } + } + if (found) continue; // Drop the new session in case of duplicate sessionss, not the old one. if (!strcasecmp(user, session[i].user)) @@ -5176,7 +5480,7 @@ int sessionsetup(sessionidt s, tunnelidt t) // no need to set a route for the same IP address of the bundle if (!session[s].bundle || (bundle[session[s].bundle].num_of_links == 1)) { - int routed = 0; + int routed = 0; // Add the route for this session. for (r = 0; r < MAXROUTE && session[s].route[r].ip; r++) @@ -6022,3 +6326,52 @@ int ip_filter(uint8_t *buf, int len, uint8_t filter) // default deny return 0; } + +#ifdef LAC + +tunnelidt lac_new_tunnel() +{ + return new_tunnel(); +} + +void lac_tunnelclear(tunnelidt t) +{ + tunnelclear(t); +} + +void lac_send_SCCRQ(tunnelidt t, uint8_t * auth, unsigned int auth_len) +{ + uint16_t version = 0x0100; // protocol version + + tunnel[t].state = TUNNELOPENING; + + // Sent SCCRQ - Start Control Connection Request + controlt *c = controlnew(1); // sending SCCRQ + controls(c, 7, hostname, 1); // host name + controls(c, 8, Vendor_name, 1); // Vendor name + control16(c, 2, version, 1); // protocol version + control32(c, 3, 3, 1); // framing Capabilities + control16(c, 9, t, 1); // assigned tunnel + controlb(c, 11, (uint8_t *) auth, auth_len, 1); // CHAP Challenge + LOG(3, 0, t, "Sent SCCRQ to REMOTE LNS\n"); + controladd(c, 0, t); // send +} + +void lac_send_ICRQ(tunnelidt t, sessionidt s) +{ + // Sent ICRQ Incoming-call-request + controlt *c = controlnew(10); // ICRQ + + control16(c, 14, s, 1); // assigned sesion + call_serial_number++; + control32(c, 15, call_serial_number, 1); // call serial number + LOG(3, s, t, "Sent ICRQ to REMOTE LNS (far ID %u)\n", tunnel[t].far); + controladd(c, 0, t); // send +} + +void lac_tunnelshutdown(tunnelidt t, char *reason, int result, int error, char *msg) +{ + tunnelshutdown(t, reason, result, error, msg); +} + +#endif