X-Git-Url: http://git.sameswireless.fr/l2tpns.git/blobdiff_plain/b939b00afdd2a5bbef84a415243c5b0fc7d50702..HEAD:/l2tpns.c diff --git a/l2tpns.c b/l2tpns.c index 394a323..0838607 100644 --- a/l2tpns.c +++ b/l2tpns.c @@ -10,9 +10,9 @@ #include #include #define SYSLOG_NAMES +#include #include #include -#include #include #include #include @@ -20,7 +20,6 @@ #include #include #include -#include #include #include #include @@ -29,7 +28,7 @@ #include #include #include -#include +#include #include #include #include @@ -37,8 +36,11 @@ #include #include #include +#include +#include #include "md5.h" +#include "dhcp6.h" #include "l2tpns.h" #include "cluster.h" #include "plugin.h" @@ -52,23 +54,32 @@ #include "bgp.h" #endif +#include "l2tplac.h" +#include "pppoe.h" +#include "dhcp6.h" + +char * Vendor_name = "Linux L2TPNS"; +uint32_t call_serial_number = 0; + // 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 +int udpfd[MAX_UDPFD + 1] = INIT_TABUDPFD; // array UDP file handle + 1 for lac udp +int udplacfd = -1; // UDP LAC file handle int controlfd = -1; // Control signal handle int clifd = -1; // Socket listening for CLI connections. int daefd = -1; // Socket listening for DAE connections. int snoopfd = -1; // UDP file handle for sending out intercept data int *radfds = NULL; // RADIUS requests file handles -int ifrfd = -1; // File descriptor for routing, etc -int ifr6fd = -1; // File descriptor for IPv6 routing, etc 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 static int syslog_log = 0; // are we logging to syslog static FILE *log_stream = 0; // file handle for direct logging (i.e. direct into file, not via syslog). uint32_t last_id = 0; // Unique ID for radius accounting @@ -91,7 +102,7 @@ union iphash { struct ipv6radix { sessionidt sess; struct ipv6radix *branch; -} ipv6_hash[256]; // Mapping from IPv6 address to session structures. +} ipv6_hash[16]; // Mapping from IPv6 address to session structures. // Traffic counters. static uint32_t udp_rx = 0, udp_rx_pkt = 0, udp_tx = 0; @@ -100,6 +111,7 @@ 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. @@ -120,6 +132,7 @@ 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_keepalive", ppp_keepalive, BOOL), CONFIG("primary_dns", default_dns1, IPv4), CONFIG("secondary_dns", default_dns2, IPv4), CONFIG("primary_radius", radiusserver[0], IPv4), @@ -142,6 +155,7 @@ config_descriptt config_values[] = { CONFIG("throttle_speed", rl_rate, UNSIGNED_LONG), CONFIG("throttle_buckets", num_tbfs, INT), CONFIG("accounting_dir", accounting_dir, STRING), + CONFIG("account_all_origin", account_all_origin, BOOL), CONFIG("dump_speed", dump_speed, BOOL), CONFIG("multi_read_count", multi_read_count, INT), CONFIG("scheduler_fifo", scheduler_fifo, BOOL), @@ -149,21 +163,50 @@ config_descriptt config_values[] = { CONFIG("icmp_rate", icmp_rate, INT), CONFIG("packet_limit", max_packets, INT), CONFIG("cluster_address", cluster_address, IPv4), + CONFIG("cluster_port", cluster_port, INT), 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), CONFIG("ipv6_prefix", ipv6_prefix, IPv6), - { NULL, 0, 0, 0 }, + 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), + CONFIG("iftun_address", iftun_address, IPv4), + CONFIG("tundevicename", tundevicename, STRING), + CONFIG("disable_lac_func", disable_lac_func, BOOL), + CONFIG("auth_tunnel_change_addr_src", auth_tunnel_change_addr_src, BOOL), + CONFIG("bind_address_remotelns", bind_address_remotelns, IPv4), + CONFIG("bind_portremotelns", bind_portremotelns, SHORT), + CONFIG("pppoe_if_to_bind", pppoe_if_to_bind, STRING), + CONFIG("pppoe_service_name", pppoe_service_name, STRING), + CONFIG("pppoe_ac_name", pppoe_ac_name, STRING), + CONFIG("disable_sending_hello", disable_sending_hello, BOOL), + CONFIG("disable_no_spoof", disable_no_spoof, BOOL), + CONFIG("bind_multi_address", bind_multi_address, STRING), + CONFIG("pppoe_only_equal_svc_name", pppoe_only_equal_svc_name, BOOL), + CONFIG("multi_hostname", multi_hostname, STRING), + CONFIG("no_throttle_local_IP", no_throttle_local_IP, BOOL), + CONFIG("dhcp6_preferred_lifetime", dhcp6_preferred_lifetime, INT), + CONFIG("dhcp6_valid_lifetime", dhcp6_valid_lifetime, INT), + CONFIG("dhcp6_server_duid", dhcp6_server_duid, INT), + CONFIG("dns6_lifetime", dns6_lifetime, INT), + CONFIG("primary_ipv6_dns", default_ipv6_dns1, IPv6), + CONFIG("secondary_ipv6_dns", default_ipv6_dns2, IPv6), + CONFIG("default_ipv6_domain_list", default_ipv6_domain_list, STRING), + { NULL, 0, 0, 0 } }; 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", @@ -195,6 +238,8 @@ 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); @@ -215,13 +260,6 @@ 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) @@ -234,6 +272,11 @@ static clockt now(double *f) time_now = t.tv_sec; time_changed++; } + + // Time in milliseconds + // TODO FOR MLPPP DEV + //time_now_ms = (t.tv_sec * 1000) + (t.tv_usec/1000); + return (t.tv_sec - basetime) * 10 + t.tv_usec / 100000 + 1; } @@ -268,7 +311,7 @@ void _log(int level, sessionidt s, tunnelidt t, const char *format, ...) ringbuffer->buffer[ringbuffer->tail].session = s; ringbuffer->buffer[ringbuffer->tail].tunnel = t; va_start(ap, format); - vsnprintf(ringbuffer->buffer[ringbuffer->tail].message, 4095, format, ap); + vsnprintf(ringbuffer->buffer[ringbuffer->tail].message, MAX_LOG_LENGTH, format, ap); va_end(ap); } #endif @@ -414,43 +457,65 @@ void random_data(uint8_t *buf, int len) // via BGP if enabled, and stuffs it into the // 'sessionbyip' cache. // -// 'ip' and 'mask' must be in _host_ order. +// 'ip' must be in _host_ order. // -static void routeset(sessionidt s, in_addr_t ip, in_addr_t mask, in_addr_t gw, int add) +static void routeset(sessionidt s, in_addr_t ip, int prefixlen, in_addr_t gw, int add) { - struct rtentry r; + struct { + struct nlmsghdr nh; + struct rtmsg rt; + char buf[32]; + } req; int i; + in_addr_t n_ip; + + if (!prefixlen) prefixlen = 32; + + ip &= 0xffffffff << (32 - prefixlen);; // Force the ip to be the first one in the route. + + 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; + } - if (!mask) mask = 0xffffffff; + req.nh.nlmsg_len = NLMSG_LENGTH(sizeof(req.rt)); - ip &= mask; // Force the ip to be the first one in the route. + 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; - 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); + 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 (mask == 0xffffffff) - 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/%s%s%s\n", add ? "add" : "del", - fmtaddr(htonl(ip), 0), fmtaddr(htonl(mask), 1), + 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) - bgp_add_route(htonl(ip), htonl(mask)); + bgp_add_route(htonl(ip), prefixlen); else - bgp_del_route(htonl(ip), htonl(mask)); + bgp_del_route(htonl(ip), prefixlen); #endif /* BGP */ // Add/Remove the IPs to the 'sessionbyip' cache. @@ -466,40 +531,68 @@ static void routeset(sessionidt s, in_addr_t ip, in_addr_t mask, in_addr_t gw, i if (!add) // Are we deleting a route? s = 0; // Caching the session as '0' is the same as uncaching. - for (i = ip; (i&mask) == (ip&mask) ; ++i) + for (i = ip; i < ip+(1<<(32-prefixlen)) ; ++i) cache_ipmap(i, s); } } 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)); - 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; + 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; - LOG(1, 0, 0, "Route %s %s/%d\n", + 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, 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) { @@ -512,12 +605,86 @@ void route6set(sessionidt s, struct in6_addr ip, int prefixlen, int add) return; } -// defined in linux/ipv6.h, but tricky to include from user-space -// TODO: move routing to use netlink rather than ioctl -struct in6_ifreq { - struct in6_addr ifr6_addr; - __u32 ifr6_prefixlen; - unsigned int ifr6_ifindex; +// +// Set up netlink socket +static void initnetlink(void) +{ + struct sockaddr_nl nladdr; + + nlfd = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE); + if (nlfd < 0) + { + LOG(0, 0, 0, "Can't create netlink socket: %s\n", strerror(errno)); + exit(1); + } + + memset(&nladdr, 0, sizeof(nladdr)); + nladdr.nl_family = AF_NETLINK; + nladdr.nl_pid = getpid(); + + if (bind(nlfd, (struct sockaddr *)&nladdr, sizeof(nladdr)) < 0) + { + LOG(0, 0, 0, "Can't bind netlink socket: %s\n", strerror(errno)); + exit(1); + } +} + +static ssize_t netlink_send(struct nlmsghdr *nh) +{ + struct sockaddr_nl nladdr; + struct iovec iov; + struct msghdr msg; + + nh->nlmsg_pid = getpid(); + nh->nlmsg_seq = ++nlseqnum; + + // set kernel address + memset(&nladdr, 0, sizeof(nladdr)); + nladdr.nl_family = AF_NETLINK; + + iov = (struct iovec){ (void *)nh, nh->nlmsg_len }; + msg = (struct msghdr){ (void *)&nladdr, sizeof(nladdr), &iov, 1, NULL, 0, 0 }; + + return sendmsg(nlfd, &msg, 0); +} + +static ssize_t netlink_recv(void *buf, ssize_t len) +{ + struct sockaddr_nl nladdr; + struct iovec iov; + struct msghdr msg; + + // set kernel address + memset(&nladdr, 0, sizeof(nladdr)); + nladdr.nl_family = AF_NETLINK; + + iov = (struct iovec){ buf, len }; + msg = (struct msghdr){ (void *)&nladdr, sizeof(nladdr), &iov, 1, NULL, 0, 0 }; + + return recvmsg(nlfd, &msg, 0); +} + +/* adapted from iproute2 */ +static void netlink_addattr(struct nlmsghdr *nh, int type, const void *data, int alen) +{ + int len = RTA_LENGTH(alen); + struct rtattr *rta; + + rta = (struct rtattr *)(((void *)nh) + NLMSG_ALIGN(nh->nlmsg_len)); + rta->rta_type = type; + rta->rta_len = len; + memcpy(RTA_DATA(rta), data, alen); + nh->nlmsg_len = NLMSG_ALIGN(nh->nlmsg_len) + RTA_ALIGN(len); +} + +// messages corresponding to different phases seq number +static char *tun_nl_phase_msg[] = { + "initialized", + "getting tun interface index", + "setting tun interface parameters", + "setting tun IPv4 address", + "setting tun LL IPv6 address", + "setting tun global IPv6 address", }; // @@ -525,8 +692,7 @@ struct in6_ifreq { static void inittun(void) { struct ifreq ifr; - struct in6_ifreq ifr6; - struct sockaddr_in sin = {0}; + memset(&ifr, 0, sizeof(ifr)); ifr.ifr_flags = IFF_TUN; @@ -540,104 +706,192 @@ static void inittun(void) int flags = fcntl(tunfd, F_GETFL, 0); fcntl(tunfd, F_SETFL, flags | O_NONBLOCK); } + + if (*config->tundevicename) + strncpy(ifr.ifr_name, config->tundevicename, IFNAMSIZ); + if (ioctl(tunfd, TUNSETIFF, (void *) &ifr) < 0) { LOG(0, 0, 0, "Can't set tun interface: %s\n", strerror(errno)); exit(1); } - assert(strlen(ifr.ifr_name) < sizeof(config->tundevice)); - strncpy(config->tundevice, ifr.ifr_name, sizeof(config->tundevice) - 1); - ifrfd = socket(PF_INET, SOCK_DGRAM, IPPROTO_IP); - - sin.sin_family = AF_INET; - sin.sin_addr.s_addr = config->bind_address ? config->bind_address : 0x01010101; // 1.1.1.1 - memcpy(&ifr.ifr_addr, &sin, sizeof(struct sockaddr)); + assert(strlen(ifr.ifr_name) < sizeof(config->tundevicename) - 1); + strncpy(config->tundevicename, ifr.ifr_name, sizeof(config->tundevicename)); - if (ioctl(ifrfd, SIOCSIFADDR, (void *) &ifr) < 0) + tunidx = if_nametoindex(config->tundevicename); + if (tunidx == 0) { - LOG(0, 0, 0, "Error setting tun address: %s\n", strerror(errno)); + LOG(0, 0, 0, "Can't get tun interface index\n"); 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, "Error setting tun queue length: %s\n", strerror(errno)); - exit(1); - } - /* set MTU to modem MRU */ - ifr.ifr_mtu = MRU; - if (ioctl(ifrfd, SIOCSIFMTU, (void *) &ifr) < 0) - { - LOG(0, 0, 0, "Error setting tun MTU: %s\n", strerror(errno)); - exit(1); - } - ifr.ifr_flags = IFF_UP; - if (ioctl(ifrfd, SIOCSIFFLAGS, (void *) &ifr) < 0) - { - LOG(0, 0, 0, "Error setting tun flags: %s\n", strerror(errno)); - exit(1); - } - if (ioctl(ifrfd, SIOCGIFINDEX, (void *) &ifr) < 0) + { - LOG(0, 0, 0, "Error getting tun ifindex: %s\n", strerror(errno)); - exit(1); - } - tunidx = ifr.ifr_ifindex; + struct { + // interface setting + struct nlmsghdr nh; + union { + struct ifinfomsg ifinfo; + struct ifaddrmsg ifaddr; + } ifmsg; + char rtdata[32]; // 32 should be enough + } req; + uint32_t txqlen, mtu; + in_addr_t ip; + + memset(&req, 0, sizeof(req)); + + 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.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 + + /* Bump up the qlen to deal with bursts from the network */ + txqlen = 1000; + netlink_addattr(&req.nh, IFLA_TXQLEN, &txqlen, sizeof(txqlen)); + /* set MTU to modem MRU */ + mtu = MRU; + netlink_addattr(&req.nh, IFLA_MTU, &mtu, sizeof(mtu)); + + if (netlink_send(&req.nh) < 0) + goto senderror; - // Only setup IPv6 on the tun device if we have a configured prefix - if (config->ipv6_prefix.s6_addr[0]) { - ifr6fd = socket(PF_INET6, SOCK_DGRAM, 0); + memset(&req, 0, sizeof(req)); - // Link local address is FE80::1 - memset(&ifr6.ifr6_addr, 0, sizeof(ifr6.ifr6_addr)); - ifr6.ifr6_addr.s6_addr[0] = 0xFE; - ifr6.ifr6_addr.s6_addr[1] = 0x80; - ifr6.ifr6_addr.s6_addr[15] = 1; - ifr6.ifr6_prefixlen = 64; - ifr6.ifr6_ifindex = ifr.ifr_ifindex; - if (ioctl(ifr6fd, SIOCSIFADDR, (void *) &ifr6) < 0) + req.nh.nlmsg_type = RTM_NEWADDR; + 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_scope = RT_SCOPE_UNIVERSE; + req.ifmsg.ifaddr.ifa_index = tunidx; + + if (config->nbmultiaddress > 1) { - LOG(0, 0, 0, "Error setting tun IPv6 link local address:" - " %s\n", strerror(errno)); + int i; + for (i = 0; i < config->nbmultiaddress ; i++) + { + ip = config->iftun_n_address[i]; + netlink_addattr(&req.nh, IFA_LOCAL, &ip, sizeof(ip)); + if (netlink_send(&req.nh) < 0) + goto senderror; + } } - - // Global address is prefix::1 - memset(&ifr6.ifr6_addr, 0, sizeof(ifr6.ifr6_addr)); - ifr6.ifr6_addr = config->ipv6_prefix; - ifr6.ifr6_addr.s6_addr[15] = 1; - ifr6.ifr6_prefixlen = 64; - ifr6.ifr6_ifindex = ifr.ifr_ifindex; - if (ioctl(ifr6fd, SIOCSIFADDR, (void *) &ifr6) < 0) + else { - LOG(0, 0, 0, "Error setting tun IPv6 global address: %s\n", - strerror(errno)); + if (config->iftun_address) + ip = config->iftun_address; + else + ip = 0x01010101; // 1.1.1.1 + netlink_addattr(&req.nh, IFA_LOCAL, &ip, sizeof(ip)); + + if (netlink_send(&req.nh) < 0) + goto senderror; + } + + + + // Only setup IPv6 on the tun device if we have a configured prefix + if (config->ipv6_prefix.s6_addr[0]) { + struct in6_addr ip6; + + memset(&req, 0, sizeof(req)); + + req.nh.nlmsg_type = RTM_NEWADDR; + 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 = tunidx; + + // Link local address is FE80::1 + memset(&ip6, 0, sizeof(ip6)); + ip6.s6_addr[0] = 0xFE; + ip6.s6_addr[1] = 0x80; + ip6.s6_addr[15] = 1; + netlink_addattr(&req.nh, IFA_LOCAL, &ip6, sizeof(ip6)); + + if (netlink_send(&req.nh) < 0) + goto senderror; + + memset(&req, 0, sizeof(req)); + + req.nh.nlmsg_type = RTM_NEWADDR; + 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 = tunidx; + + // Global address is prefix::1 + ip6 = config->ipv6_prefix; + ip6.s6_addr[15] = 1; + netlink_addattr(&req.nh, IFA_LOCAL, &ip6, sizeof(ip6)); + + if (netlink_send(&req.nh) < 0) + goto senderror; } + + memset(&req, 0, sizeof(req)); + + req.nh.nlmsg_type = NLMSG_DONE; + req.nh.nlmsg_len = NLMSG_LENGTH(0); + + if (netlink_send(&req.nh) < 0) + goto senderror; + + // if we get an error for seqnum < min_initok_nlseqnum, + // we must exit as initialization went wrong + if (config->ipv6_prefix.s6_addr[0]) + min_initok_nlseqnum = 5 + 1; // idx + if + addr + 2*addr6 + else + min_initok_nlseqnum = 3 + 1; // idx + if + addr } + + return; + +senderror: + LOG(0, 0, 0, "Error while setting up tun device: %s\n", strerror(errno)); + exit(1); } -// set up UDP ports -static void initudp(void) +// set up LAC UDP ports +static void initlacudp(void) { int on = 1; struct sockaddr_in addr; - // Tunnel + // Tunnel to Remote LNS memset(&addr, 0, sizeof(addr)); addr.sin_family = AF_INET; - addr.sin_port = htons(L2TPPORT); - addr.sin_addr.s_addr = config->bind_address; - udpfd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP); - setsockopt(udpfd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)); + addr.sin_port = htons(config->bind_portremotelns); + addr.sin_addr.s_addr = config->bind_address_remotelns; + udplacfd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP); + setsockopt(udplacfd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)); { - int flags = fcntl(udpfd, F_GETFL, 0); - fcntl(udpfd, F_SETFL, flags | O_NONBLOCK); + int flags = fcntl(udplacfd, F_GETFL, 0); + fcntl(udplacfd, F_SETFL, flags | O_NONBLOCK); } - if (bind(udpfd, (struct sockaddr *) &addr, sizeof(addr)) < 0) + if (bind(udplacfd, (struct sockaddr *) &addr, sizeof(addr)) < 0) { - LOG(0, 0, 0, "Error in UDP bind: %s\n", strerror(errno)); + LOG(0, 0, 0, "Error in UDP REMOTE LNS bind: %s\n", strerror(errno)); exit(1); } +} + +// set up control ports +static void initcontrol(void) +{ + int on = 1; + struct sockaddr_in addr; // Control memset(&addr, 0, sizeof(addr)); @@ -651,6 +905,13 @@ static void initudp(void) LOG(0, 0, 0, "Error in control bind: %s\n", strerror(errno)); exit(1); } +} + +// set up Dynamic Authorization Extensions to RADIUS port +static void initdae(void) +{ + int on = 1; + struct sockaddr_in addr; // Dynamic Authorization Extensions to RADIUS memset(&addr, 0, sizeof(addr)); @@ -664,9 +925,30 @@ static void initudp(void) LOG(0, 0, 0, "Error in DAE bind: %s\n", strerror(errno)); exit(1); } +} - // Intercept - snoopfd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP); +// set up UDP ports +static void initudp(int * pudpfd, in_addr_t ip_bind) +{ + int on = 1; + struct sockaddr_in addr; + + // Tunnel + memset(&addr, 0, sizeof(addr)); + addr.sin_family = AF_INET; + addr.sin_port = htons(L2TPPORT); + addr.sin_addr.s_addr = ip_bind; + (*pudpfd) = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP); + setsockopt((*pudpfd), SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)); + { + int flags = fcntl((*pudpfd), F_GETFL, 0); + fcntl((*pudpfd), F_SETFL, flags | O_NONBLOCK); + } + if (bind((*pudpfd), (struct sockaddr *) &addr, sizeof(addr)) < 0) + { + LOG(0, 0, 0, "Error in UDP bind: %s\n", strerror(errno)); + exit(1); + } } // @@ -703,20 +985,24 @@ static sessionidt lookup_ipv6map(struct in6_addr ip) int s; char ipv6addr[INET6_ADDRSTRLEN]; - curnode = &ipv6_hash[ip.s6_addr[0]]; + curnode = &ipv6_hash[((ip.s6_addr[0]) & 0xF0)>>4]; i = 1; s = curnode->sess; - while (s == 0 && i < 15 && curnode->branch != NULL) + while (s == 0 && i < 32 && curnode->branch != NULL) { - curnode = &curnode->branch[ip.s6_addr[i]]; + if (i & 1) + curnode = &curnode->branch[ip.s6_addr[i>>1] & 0x0F]; + else + curnode = &curnode->branch[(ip.s6_addr[i>>1] & 0xF0)>>4]; + s = curnode->sess; i++; } LOG(4, s, session[s].tunnel, "Looking up address %s and got %d\n", - inet_ntop(AF_INET6, &ip, ipv6addr, - INET6_ADDRSTRLEN), + inet_ntop(AF_INET6, &ip, ipv6addr, + INET6_ADDRSTRLEN), s); return s; @@ -743,8 +1029,10 @@ sessionidt sessionbyipv6(struct in6_addr ip) ip.s6_addr[1] == 0x80 && ip.s6_addr16[1] == 0 && ip.s6_addr16[2] == 0 && - ip.s6_addr16[3] == 0)) { - s = lookup_ipmap(*(in_addr_t *) &ip.s6_addr[8]); + ip.s6_addr16[3] == 0)) + { + in_addr_t *pipv4 = (in_addr_t *) &ip.s6_addr[8]; + s = lookup_ipmap(*pipv4); } else { s = lookup_ipv6map(ip); } @@ -755,6 +1043,19 @@ sessionidt sessionbyipv6(struct in6_addr ip) return 0; } +sessionidt sessionbyipv6new(struct in6_addr ip) +{ + sessionidt s; + CSTAT(sessionbyipv6new); + + s = lookup_ipv6map(ip); + + if (s > 0 && s < MAXSESSION && session[s].opened) + return s; + + return 0; +} + // // Take an IP address in HOST byte order and // add it to the sessionid by IP cache. @@ -794,22 +1095,28 @@ static void uncache_ipmap(in_addr_t ip) static void cache_ipv6map(struct in6_addr ip, int prefixlen, sessionidt s) { int i; - int bytes; + int niblles; struct ipv6radix *curnode; char ipv6addr[INET6_ADDRSTRLEN]; - curnode = &ipv6_hash[ip.s6_addr[0]]; + curnode = &ipv6_hash[((ip.s6_addr[0]) & 0xF0)>>4]; - bytes = prefixlen >> 3; + niblles = prefixlen >> 2; i = 1; - while (i < bytes) { + + while (i < niblles) + { if (curnode->branch == NULL) { - if (!(curnode->branch = calloc(256, - sizeof (struct ipv6radix)))) + if (!(curnode->branch = calloc(16, sizeof (struct ipv6radix)))) return; } - curnode = &curnode->branch[ip.s6_addr[i]]; + + if (i & 1) + curnode = &curnode->branch[ip.s6_addr[i>>1] & 0x0F]; + else + curnode = &curnode->branch[(ip.s6_addr[i>>1] & 0xF0)>>4]; + i++; } @@ -817,20 +1124,20 @@ static void cache_ipv6map(struct in6_addr ip, int prefixlen, sessionidt s) if (s > 0) LOG(4, s, session[s].tunnel, "Caching ip address %s/%d\n", - inet_ntop(AF_INET6, &ip, ipv6addr, - INET6_ADDRSTRLEN), + inet_ntop(AF_INET6, &ip, ipv6addr, + INET6_ADDRSTRLEN), prefixlen); else if (s == 0) LOG(4, 0, 0, "Un-caching ip address %s/%d\n", - inet_ntop(AF_INET6, &ip, ipv6addr, - INET6_ADDRSTRLEN), + inet_ntop(AF_INET6, &ip, ipv6addr, + INET6_ADDRSTRLEN), prefixlen); } // // CLI list to dump current ipcache. // -int cmd_show_ipcache(struct cli_def *cli, char *command, char **argv, int argc) +int cmd_show_ipcache(struct cli_def *cli, const char *command, char **argv, int argc) { union iphash *d = ip_hash, *e, *f, *g; int i, j, k, l; @@ -874,7 +1181,6 @@ int cmd_show_ipcache(struct cli_def *cli, char *command, char **argv, int argc) return CLI_OK; } - // Find session by username, 0 for not found // walled garden users aren't authenticated, so the username is // reasonably useless. Ignore them to avoid incorrect actions @@ -959,6 +1265,12 @@ void tunnelsend(uint8_t * buf, uint16_t l, tunnelidt t) return; } + if (t == TUNNEL_ID_PPPOE) + { + pppoe_sess_send(buf, l, t); + return; + } + if (!tunnel[t].ip) { LOG(1, 0, t, "Error sending data out tunnel: no remote endpoint (tunnel not set up)\n"); @@ -986,10 +1298,10 @@ void tunnelsend(uint8_t * buf, uint16_t l, tunnelidt t) } } - if (sendto(udpfd, buf, l, 0, (void *) &addr, sizeof(addr)) < 0) + if (sendto(udpfd[tunnel[t].indexudp], buf, l, 0, (void *) &addr, sizeof(addr)) < 0) { 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)); + strerror(errno), udpfd[tunnel[t].indexudp], buf, l, inet_ntoa(addr.sin_addr)); STAT(tunnel_tx_errors); return; } @@ -1133,12 +1445,13 @@ 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; tunnelidt t; - in_addr_t ip; + in_addr_t ip, ip_src; uint8_t *data = buf; // Keep a copy of the originals. int size = len; @@ -1171,6 +1484,7 @@ static void processipout(uint8_t *buf, int len) return; } + ip_src = *(uint32_t *)(buf + 12); ip = *(uint32_t *)(buf + 16); if (!(s = sessionbyip(ip))) { @@ -1255,12 +1569,15 @@ static void processipout(uint8_t *buf, int len) if (sp->tbf_out) { - // Are we throttling this session? - if (config->cluster_iam_master) - tbf_queue_packet(sp->tbf_out, data, size); - else - master_throttle_packet(sp->tbf_out, data, size); - return; + if (!config->no_throttle_local_IP || !sessionbyip(ip_src)) + { + // Are we throttling this session? + if (config->cluster_iam_master) + tbf_queue_packet(sp->tbf_out, data, size); + else + master_throttle_packet(sp->tbf_out, data, size); + return; + } } if (sp->walled_garden && !config->cluster_iam_master) @@ -1270,75 +1587,121 @@ 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 + 1) % 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 + 1) % 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 + 1) % 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 = opt_makeppp(buf, len, s, t, PPPIP, 0, 0, 0); + tunnelsend(p, len + (buf-p), t); // send it... update_session_out_stat(s, sp, len); - } - } + } + } + else + { + uint8_t *p = opt_makeppp(buf, len, s, t, PPPIP, 0, 0, 0); + tunnelsend(p, len + (buf-p), 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) @@ -1354,7 +1717,6 @@ static void processipv6out(uint8_t * buf, int len) sessionidt s; sessiont *sp; tunnelidt t; - in_addr_t ip; struct in6_addr ip6; uint8_t *data = buf; // Keep a copy of the originals. @@ -1393,10 +1755,9 @@ static void processipv6out(uint8_t * buf, int len) if (s == 0) { - ip = *(uint32_t *)(buf + 32); - s = sessionbyip(ip); + s = sessionbyipv6new(ip6); } - + if (s == 0) { // Is this a packet for a session that doesn't exist? @@ -1418,7 +1779,10 @@ 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 + 1) % 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; @@ -1473,6 +1837,8 @@ static void send_ipout(sessionidt s, uint8_t *buf, int len) { sessiont *sp; tunnelidt t; + uint8_t *p; + uint8_t *data = buf; // Keep a copy of the originals. uint8_t b[MAXETHER + 20]; @@ -1495,11 +1861,14 @@ static void send_ipout(sessionidt s, uint8_t *buf, int len) LOG(5, s, t, "Ethernet -> Tunnel (%d bytes)\n", len); // Add on L2TP header - { - uint8_t *p = makeppp(b, sizeof(b), buf, len, s, t, PPPIP, 0, 0, 0); - if (!p) return; - tunnelsend(b, len + (p-b), t); // send it... - } + if (*(uint16_t *) (data + 2) == htons(PKTIPV6)) + p = makeppp(b, sizeof(b), buf, len, s, t, PPPIPV6, 0, 0, 0); // IPV6 + else + p = makeppp(b, sizeof(b), buf, len, s, t, PPPIP, 0, 0, 0); // IPV4 + + if (!p) return; + + tunnelsend(b, len + (p-b), t); // send it... // Snooping this session. if (sp->snoop_ip && sp->snoop_port) @@ -1518,10 +1887,11 @@ 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); + uint16_t *pint16 = (uint16_t *) (c->buf + c->length + 0); + pint16[0] = htons(l); + pint16[1] = htons(0); + pint16[2] = htons(avp); + pint16[3] = htons(val); c->length += 8; } @@ -1529,10 +1899,12 @@ 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); + uint16_t *pint16 = (uint16_t *) (c->buf + c->length + 0); + uint32_t *pint32 = (uint32_t *) (c->buf + c->length + 6); + pint16[0] = htons(l); + pint16[1] = htons(0); + pint16[2] = htons(avp); + pint32[0] = htonl(val); c->length += 10; } @@ -1540,9 +1912,10 @@ 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); + uint16_t *pint16 = (uint16_t *) (c->buf + c->length + 0); + pint16[0] = htons(l); + pint16[1] = htons(0); + pint16[2] = htons(avp); memcpy(c->buf + c->length + 6, val, strlen(val)); c->length += 6 + strlen(val); } @@ -1551,9 +1924,10 @@ 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); + uint16_t *pint16 = (uint16_t *) (c->buf + c->length + 0); + pint16[0] = htons(l); + pint16[1] = htons(0); + pint16[2] = htons(avp); memcpy(c->buf + c->length + 6, val, len); c->length += 6 + len; } @@ -1571,7 +1945,8 @@ static controlt *controlnew(uint16_t mtype) } assert(c); c->next = 0; - *(uint16_t *) (c->buf + 0) = htons(0xC802); // flags/ver + c->buf[0] = 0xC8; // flags + c->buf[1] = 0x02; // ver c->length = 12; control16(c, 0, mtype, 1); return c; @@ -1581,26 +1956,27 @@ 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 + uint16_t *pint16 = (uint16_t *) (c->buf + 2); + pint16[0] = htons(c->length); // length + pint16[1] = htons(tunnel[t].far); // tunnel + pint16[2] = htons(far); // session + pint16[3] = htons(tunnel[t].ns); // sequence tunnel[t].ns++; // advance sequence // link in message in to queue if (tunnel[t].controlc) @@ -1725,7 +2101,6 @@ void sessionshutdown(sessionidt s, char const *reason, int cdn_result, int cdn_e struct param_kill_session data = { &tunnel[session[s].tunnel], &session[s] }; LOG(2, s, session[s].tunnel, "Shutting down session %u: %s\n", s, reason); run_plugins(PLUGIN_KILL_SESSION, &data); - session[s].die = TIME + 150; // Clean up in 15 seconds } if (session[s].ip && !walled_garden && !session[s].die) @@ -1750,17 +2125,20 @@ void sessionshutdown(sessionidt s, char const *reason, int cdn_result, int cdn_e memcpy(&shut_acct[shut_acct_n++], &session[s], sizeof(session[s])); } + if (!session[s].die) + session[s].die = TIME + 150; // Clean up in 15 seconds + if (session[s].ip) { // IP allocated, clear and unroute int r; int routed = 0; for (r = 0; r < MAXROUTE && session[s].route[r].ip; r++) { - if ((session[s].ip & session[s].route[r].mask) == - (session[s].route[r].ip & session[s].route[r].mask)) + if ((session[s].ip >> (32-session[s].route[r].prefixlen)) == + (session[s].route[r].ip >> (32-session[s].route[r].prefixlen))) routed++; - if (del_routes) routeset(s, session[s].route[r].ip, session[s].route[r].mask, 0, 0); + if (del_routes) routeset(s, session[s].route[r].ip, session[s].route[r].prefixlen, 0, 0); session[s].route[r].ip = 0; } @@ -1772,60 +2150,114 @@ void sessionshutdown(sessionidt s, char const *reason, int cdn_result, int cdn_e else free_ip_address(s); - // unroute IPv6, if setup - if (session[s].ppp.ipv6cp == Opened && session[s].ipv6prefixlen && del_routes) - route6set(s, session[s].ipv6route, session[s].ipv6prefixlen, 0); - - 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) - { - bundleclear(b); - LOG(3, s, 0, "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) - { - uint8_t ml; - for(ml = 0; mlpeer_address ? config->peer_address : - config->bind_address ? config->bind_address : + config->iftun_n_address[tunnel[t].indexudp] ? config->iftun_n_address[tunnel[t].indexudp] : my_address; // send my IP tunnelsend(buf, 10 + (q - buf), t); // send it @@ -1929,6 +2361,16 @@ void sessionkill(sessionidt s, char *reason) if (sess_local[s].radius) radiusclear(sess_local[s].radius, s); // cant send clean accounting data, session is killed + if (session[s].forwardtosession) + { + sessionidt sess = session[s].forwardtosession; + if (session[sess].forwardtosession == s) + { + // Shutdown the linked session also. + sessionshutdown(sess, reason, CDN_ADMIN_DISC, TERM_ADMIN_RESET); + } + } + LOG(2, s, session[s].tunnel, "Kill session %d (%s): %s\n", s, session[s].user, reason); sessionclear(s); cluster_send_session(s); @@ -2008,21 +2450,21 @@ static void tunnelshutdown(tunnelidt t, char *reason, int result, int error, cha controlt *c = controlnew(4); // sending StopCCN if (error) { - uint8_t buf[64]; + uint16_t buf[32]; int l = 4; - *(uint16_t *) buf = htons(result); - *(uint16_t *) (buf+2) = htons(error); + buf[0] = htons(result); + buf[1] = htons(error); if (msg) { int m = strlen(msg); if (m + 4 > 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); @@ -2033,9 +2475,10 @@ static void tunnelshutdown(tunnelidt t, char *reason, int result, int error, cha } // read and process packet on tunnel (UDP) -void processudp(uint8_t *buf, int len, struct sockaddr_in *addr) +void processudp(uint8_t *buf, int len, struct sockaddr_in *addr, uint16_t indexudpfd) { - uint8_t *chapresponse = NULL; + uint8_t *sendchalresponse = NULL; + uint8_t *recvchalresponse = NULL; uint16_t l = len, t = 0, s = 0, ns = 0, nr = 0; uint8_t *p = buf + 2; @@ -2080,6 +2523,12 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr) STAT(tunnel_rx_errors); return; } + if (t == TUNNEL_ID_PPPOE) + { + LOG(1, s, t, "Received UDP packet with tunnel ID reserved for pppoe\n"); + STAT(tunnel_rx_errors); + return; + } if (*buf & 0x08) { // ns/nr ns = ntohs(*(uint16_t *) p); @@ -2118,7 +2567,7 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr) if (!config->cluster_iam_master) { - master_forward_packet(buf, len, addr->sin_addr.s_addr, addr->sin_port); + master_forward_packet(buf, len, addr->sin_addr.s_addr, addr->sin_port, indexudpfd); return; } @@ -2168,6 +2617,7 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr) tunnel[t].ip = ntohl(*(in_addr_t *) & addr->sin_addr); tunnel[t].port = ntohs(addr->sin_port); tunnel[t].window = 4; // default window + tunnel[t].indexudp = indexudpfd; STAT(tunnel_created); LOG(1, 0, t, " New tunnel from %s:%u ID %u\n", fmtaddr(htonl(tunnel[t].ip), 0), tunnel[t].port, t); @@ -2266,7 +2716,14 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr) result = 2; // general error error = 3; // reserved field non-zero msg = 0; - continue; // next + if (n == 0) + { + // if continue a infinity loop is created. + LOG(1, s, t, "It's infinite loop protection %02X\n", *b); + return; + } + else + continue; // next } b += 2; if (*(uint16_t *) (b)) @@ -2276,7 +2733,14 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr) result = 2; // general error error = 6; // generic vendor-specific error msg = "unsupported vendor-specific"; - continue; // next + if (n == 0) + { + // if continue a infinity loop is created. + LOG(1, s, t, "It's infinite loop protection %02X\n", *b); + return; + } + else + continue; // next } b += 2; mtype = ntohs(*(uint16_t *) (b)); @@ -2336,7 +2800,7 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr) n = orig_len; } - LOG(4, s, t, " AVP %u (%s) len %d%s%s\n", mtype, l2tp_avp_name(mtype), n, + LOG(3, s, t, " AVP %u (%s) len %d%s%s\n", mtype, l2tp_avp_name(mtype), n, flags & 0x40 ? ", hidden" : "", flags & 0x80 ? ", mandatory" : ""); switch (mtype) @@ -2344,7 +2808,7 @@ 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(3, s, t, " Message type = %u (%s)\n", message, l2tp_code(message)); break; case 1: // result code { @@ -2367,15 +2831,15 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr) cause = TERM_ADMIN_RESET; } - LOG(4, s, t, " Result Code %u: %s\n", rescode, resdesc); + LOG(3, s, t, " Result Code %u: %s\n", rescode, resdesc); if (n >= 4) { uint16_t errcode = ntohs(*(uint16_t *)(b + 2)); errdesc = l2tp_error_code(errcode); - LOG(4, s, t, " Error Code %u: %s\n", errcode, errdesc); + LOG(3, s, t, " Error Code %u: %s\n", errcode, errdesc); } if (n > 4) - LOG(4, s, t, " Error String: %.*s\n", n-4, b+4); + LOG(3, s, t, " Error String: %.*s\n", n-4, b+4); if (cause && disc_cause_set < mtype) // take cause from attrib 46 in preference { @@ -2390,7 +2854,7 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr) case 2: // protocol version { version = ntohs(*(uint16_t *) (b)); - LOG(4, s, t, " Protocol version = %u\n", version); + LOG(3, s, t, " Protocol version = %u\n", version); if (version && version != 0x0100) { // allow 0.0 and 1.0 LOG(1, s, t, " Bad protocol version %04X\n", version); @@ -2414,59 +2878,69 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr) case 7: // host name memset(tunnel[t].hostname, 0, sizeof(tunnel[t].hostname)); memcpy(tunnel[t].hostname, b, (n < sizeof(tunnel[t].hostname)) ? n : sizeof(tunnel[t].hostname) - 1); - LOG(4, s, t, " Tunnel hostname = \"%s\"\n", tunnel[t].hostname); + LOG(3, 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)) ? n : sizeof(tunnel[t].vendor) - 1); - LOG(4, s, t, " Vendor name = \"%s\"\n", tunnel[t].vendor); + LOG(3, s, t, " Vendor name = \"%s\"\n", tunnel[t].vendor); break; case 9: // assigned tunnel tunnel[t].far = ntohs(*(uint16_t *) (b)); - LOG(4, s, t, " Remote tunnel id = %u\n", tunnel[t].far); + LOG(3, s, t, " Remote tunnel id = %u\n", tunnel[t].far); break; case 10: // rx window tunnel[t].window = ntohs(*(uint16_t *) (b)); if (!tunnel[t].window) tunnel[t].window = 1; // window of 0 is silly - LOG(4, s, t, " rx window = %u\n", tunnel[t].window); + LOG(3, s, t, " rx window = %u\n", tunnel[t].window); break; - case 11: // Challenge + case 11: // Request Challenge { - LOG(4, s, t, " LAC requested CHAP authentication for tunnel\n"); - build_chap_response(b, 2, n, &chapresponse); + LOG(3, s, t, " LAC requested CHAP authentication for tunnel\n"); + if (message == 1) + build_chap_response(b, 2, n, &sendchalresponse); + else if (message == 2) + build_chap_response(b, 3, n, &sendchalresponse); } break; - case 13: // Response + case 13: // receive challenge Response + if (tunnel[t].isremotelns) + { + recvchalresponse = calloc(17, 1); + memcpy(recvchalresponse, b, (n < 17) ? n : 16); + LOG(3, s, t, "received challenge response from REMOTE LNS\n"); + } + else // Why did they send a response? We never challenge. LOG(2, s, t, " received unexpected challenge response\n"); break; case 14: // assigned session asession = session[s].far = ntohs(*(uint16_t *) (b)); - LOG(4, s, t, " assigned session = %u\n", asession); + LOG(3, s, t, " assigned session = %u\n", asession); break; case 15: // call serial number - LOG(4, s, t, " call serial number = %u\n", ntohl(*(uint32_t *)b)); + LOG(3, s, t, " call serial number = %u\n", ntohl(*(uint32_t *)b)); break; case 18: // bearer type - LOG(4, s, t, " bearer type = %u\n", ntohl(*(uint32_t *)b)); + LOG(3, s, t, " bearer type = %u\n", ntohl(*(uint32_t *)b)); // TBA - for RADIUS break; case 19: // framing type - LOG(4, s, t, " framing type = %u\n", ntohl(*(uint32_t *)b)); + LOG(3, s, t, " framing type = %u\n", ntohl(*(uint32_t *)b)); // TBA break; case 21: // called number memset(called, 0, sizeof(called)); memcpy(called, b, (n < sizeof(called)) ? n : sizeof(called) - 1); - LOG(4, s, t, " Called <%s>\n", called); + LOG(3, s, t, " Called <%s>\n", called); break; case 22: // calling number memset(calling, 0, sizeof(calling)); memcpy(calling, b, (n < sizeof(calling)) ? n : sizeof(calling) - 1); - LOG(4, s, t, " Calling <%s>\n", calling); + LOG(3, s, t, " Calling <%s>\n", calling); break; case 23: // subtype break; @@ -2483,7 +2957,7 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr) memcpy(tmp, b, (n < sizeof(tmp)) ? n : sizeof(tmp) - 1); session[s].tx_connect_speed = atol(tmp); } - LOG(4, s, t, " TX connect speed <%u>\n", session[s].tx_connect_speed); + LOG(3, s, t, " TX connect speed <%u>\n", session[s].tx_connect_speed); break; case 38: // rx connect speed if (n == 4) @@ -2498,18 +2972,18 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr) memcpy(tmp, b, (n < sizeof(tmp)) ? n : sizeof(tmp) - 1); session[s].rx_connect_speed = atol(tmp); } - LOG(4, s, t, " RX connect speed <%u>\n", session[s].rx_connect_speed); + LOG(3, s, t, " RX connect speed <%u>\n", session[s].rx_connect_speed); break; case 25: // Physical Channel ID { uint32_t tmp = ntohl(*(uint32_t *) b); - LOG(4, s, t, " Physical Channel ID <%X>\n", tmp); + LOG(3, s, t, " Physical Channel ID <%X>\n", tmp); break; } case 29: // Proxy Authentication Type { uint16_t atype = ntohs(*(uint16_t *)b); - LOG(4, s, t, " Proxy Auth Type %u (%s)\n", atype, ppp_auth_type(atype)); + LOG(3, s, t, " Proxy Auth Type %u (%s)\n", atype, ppp_auth_type(atype)); break; } case 30: // Proxy Authentication Name @@ -2517,23 +2991,23 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr) char authname[64]; memset(authname, 0, sizeof(authname)); memcpy(authname, b, (n < sizeof(authname)) ? n : sizeof(authname) - 1); - LOG(4, s, t, " Proxy Auth Name (%s)\n", + LOG(3, s, t, " Proxy Auth Name (%s)\n", authname); break; } case 31: // Proxy Authentication Challenge { - LOG(4, s, t, " Proxy Auth Challenge\n"); + LOG(3, s, t, " Proxy Auth Challenge\n"); break; } case 32: // Proxy Authentication ID { uint16_t authid = ntohs(*(uint16_t *)(b)); - LOG(4, s, t, " Proxy Auth ID (%u)\n", authid); + LOG(3, s, t, " Proxy Auth ID (%u)\n", authid); break; } case 33: // Proxy Authentication Response - LOG(4, s, t, " Proxy Auth Response\n"); + LOG(3, s, t, " Proxy Auth Response\n"); break; case 27: // last sent lcp { // find magic number @@ -2557,7 +3031,7 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr) case 39: // seq required - we control it as an LNS anyway... break; case 36: // Random Vector - LOG(4, s, t, " Random Vector received. Enabled AVP Hiding.\n"); + LOG(3, s, t, " Random Vector received. Enabled AVP Hiding.\n"); memset(session[s].random_vector, 0, sizeof(session[s].random_vector)); if (n > sizeof(session[s].random_vector)) n = sizeof(session[s].random_vector); @@ -2571,7 +3045,7 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr) uint16_t proto = ntohs(*(uint16_t *) (b + 2)); uint8_t dir = *(b + 4); - LOG(4, s, t, " PPP disconnect cause " + LOG(3, s, t, " PPP disconnect cause " "(code=%u, proto=%04X, dir=%u, msg=\"%.*s\")\n", code, proto, dir, n - 5, b + 5); @@ -2664,13 +3138,15 @@ 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 - controls(c, 7, hostname, 1); // host name - if (chapresponse) controlb(c, 13, chapresponse, 16, 1); // Challenge response + controls(c, 7, config->multi_n_hostname[tunnel[t].indexudp][0]?config->multi_n_hostname[tunnel[t].indexudp]:hostname, 1); // host name + if (sendchalresponse) controlb(c, 13, sendchalresponse, 16, 1); // Send Challenge response control16(c, 9, t, 1); // assigned tunnel controladd(c, 0, t); // send the resply } @@ -2682,33 +3158,73 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr) case 2: // SCCRP tunnel[t].state = TUNNELOPEN; tunnel[t].lastrec = time_now; + LOG(3, s, t, "Received SCCRP\n"); + if (main_quit != QUIT_SHUTDOWN) + { + if (tunnel[t].isremotelns && recvchalresponse) + { + hasht hash; + + lac_calc_rlns_auth(t, 2, hash); // id = 2 (SCCRP) + // check authenticator + if (memcmp(hash, recvchalresponse, 16) == 0) + { + LOG(3, s, t, "sending SCCCN to REMOTE LNS\n"); + controlt *c = controlnew(3); // sending SCCCN + controls(c, 7, config->multi_n_hostname[tunnel[t].indexudp][0]?config->multi_n_hostname[tunnel[t].indexudp]: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 + if (sendchalresponse) controlb(c, 13, sendchalresponse, 16, 1); // Challenge response + 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); + } 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; case 6: // HELLO + LOG(3, s, t, "Received HELLO\n"); controlnull(t); // simply ACK 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])); @@ -2736,6 +3252,7 @@ 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); @@ -2749,9 +3266,24 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr) } return; case 11: // ICRP - // TBA + 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"); + } 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 @@ -2764,13 +3296,14 @@ 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->iftun_address ? config->iftun_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; @@ -2785,7 +3318,8 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr) LOG(1, s, t, "Unknown message type %u\n", message); break; } - if (chapresponse) free(chapresponse); + if (sendchalresponse) free(sendchalresponse); + if (recvchalresponse) free(recvchalresponse); cluster_send_tunnel(t); } else @@ -2821,16 +3355,35 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr) l -= 2; } + if (session[s].forwardtosession) + { + LOG(5, s, t, "Forwarding data session to session %u\n", session[s].forwardtosession); + // Forward to LAC/BAS or Remote LNS session + lac_session_forward(buf, len, s, proto, addr->sin_addr.s_addr, addr->sin_port, indexudpfd); + return; + } + else if (config->auth_tunnel_change_addr_src) + { + if (tunnel[t].ip != ntohl(addr->sin_addr.s_addr) && + tunnel[t].port == ntohs(addr->sin_port)) + { + // The remotes BAS are a clustered l2tpns server and the source IP has changed + LOG(5, s, t, "The tunnel IP source (%s) has changed by new IP (%s)\n", + fmtaddr(htonl(tunnel[t].ip), 0), fmtaddr(addr->sin_addr.s_addr, 0)); + + tunnel[t].ip = ntohl(addr->sin_addr.s_addr); + } + } + if (s && !session[s].opened) // Is something wrong?? { if (!config->cluster_iam_master) { // Pass it off to the master to deal with.. - master_forward_packet(buf, len, addr->sin_addr.s_addr, addr->sin_port); + master_forward_packet(buf, len, addr->sin_addr.s_addr, addr->sin_port, indexudpfd); return; } - LOG(1, s, t, "UDP packet contains session which is not opened. Dropping packet.\n"); STAT(tunnel_rx_errors); return; @@ -2839,37 +3392,37 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr) 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; } + if (!config->cluster_iam_master) { master_forward_packet(buf, len, addr->sin_addr.s_addr, addr->sin_port, indexudpfd); return; } processpap(s, t, p, l); } 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; } + if (!config->cluster_iam_master) { master_forward_packet(buf, len, addr->sin_addr.s_addr, addr->sin_port, indexudpfd); return; } processchap(s, t, p, l); } 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; } + if (!config->cluster_iam_master) { master_forward_packet(buf, len, addr->sin_addr.s_addr, addr->sin_port, indexudpfd); return; } processlcp(s, t, p, l); } 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; } + if (!config->cluster_iam_master) { master_forward_packet(buf, len, addr->sin_addr.s_addr, addr->sin_port, indexudpfd); return; } processipcp(s, t, p, l); } 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; } + if (!config->cluster_iam_master) { master_forward_packet(buf, len, addr->sin_addr.s_addr, addr->sin_port, indexudpfd); return; } processipv6cp(s, t, p, l); } 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; } + if (!config->cluster_iam_master) { master_forward_packet(buf, len, addr->sin_addr.s_addr, addr->sin_port, indexudpfd); return; } processccp(s, t, p, l); } else if (proto == PPPIP) @@ -2883,7 +3436,7 @@ 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) { - master_forward_packet(buf, len, addr->sin_addr.s_addr, addr->sin_port); + master_forward_packet(buf, len, addr->sin_addr.s_addr, addr->sin_port, indexudpfd); return; } @@ -2898,9 +3451,10 @@ 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) { - master_forward_packet(buf, len, addr->sin_addr.s_addr, addr->sin_port); + // The fragments reconstruction is managed by the Master. + master_forward_packet(buf, len, addr->sin_addr.s_addr, addr->sin_port, indexudpfd); return; } @@ -2917,16 +3471,30 @@ 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) { - master_forward_packet(buf, len, addr->sin_addr.s_addr, addr->sin_port); + master_forward_packet(buf, len, addr->sin_addr.s_addr, addr->sin_port, indexudpfd); return; } + if (!config->cluster_iam_master) + { + // Check if DhcpV6, IP dst: FF02::1:2, Src Port 0x0222 (546), Dst Port 0x0223 (547) + if (*(p + 6) == 17 && *(p + 24) == 0xFF && *(p + 25) == 2 && + *(uint32_t *)(p + 26) == 0 && *(uint32_t *)(p + 30) == 0 && + *(uint16_t *)(p + 34) == 0 && *(p + 36) == 0 && *(p + 37) == 1 && *(p + 38) == 0 && *(p + 39) == 2 && + *(p + 40) == 2 && *(p + 41) == 0x22 && *(p + 42) == 2 && *(p + 43) == 0x23) + { + // DHCPV6 must be managed by the Master. + master_forward_packet(buf, len, addr->sin_addr.s_addr, addr->sin_port, indexudpfd); + return; + } + } + processipv6in(s, t, p, l); } else if (session[s].ppp.lcp == Opened) { 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; } + if (!config->cluster_iam_master) { master_forward_packet(buf, len, addr->sin_addr.s_addr, addr->sin_port, indexudpfd); return; } protoreject(s, t, p, l, proto); } else @@ -2938,6 +3506,7 @@ 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); @@ -3013,6 +3582,9 @@ static void regular_cleanups(double period) if (t > config->cluster_highest_tunnelid) t = 1; + if (t == TUNNEL_ID_PPPOE) + continue; + // check for expired tunnels if (tunnel[t].die && tunnel[t].die <= TIME) { @@ -3045,10 +3617,13 @@ static void regular_cleanups(double period) // Send hello if (tunnel[t].state == TUNNELOPEN && !tunnel[t].controlc && (time_now - tunnel[t].lastrec) > 60) { - controlt *c = controlnew(6); // sending HELLO - controladd(c, 0, t); // send the message - LOG(3, 0, t, "Sending HELLO message\n"); - t_actions++; + if (!config->disable_sending_hello) + { + controlt *c = controlnew(6); // sending HELLO + controladd(c, 0, t); // send the message + LOG(3, 0, t, "Sending HELLO message\n"); + t_actions++; + } } // Check for tunnel changes requested from the CLI @@ -3211,8 +3786,8 @@ 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); @@ -3221,8 +3796,10 @@ 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) && - (time_now - sess_local[s].last_echo >= ECHO_TIMEOUT)) + if (session[s].ppp.phase >= Establish && + ((!config->ppp_keepalive) || + (time_now - session[s].last_packet >= config->echo_timeout)) && + (time_now - sess_local[s].last_echo >= ECHO_TIMEOUT)) { uint8_t b[MAXETHER]; @@ -3236,7 +3813,8 @@ static void regular_cleanups(double period) LOG(4, 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 + + tunnelsend(b, (q - b) + 8, session[s].tunnel); // send it sess_local[s].last_echo = time_now; s_actions++; } @@ -3392,35 +3970,36 @@ 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) { @@ -3486,8 +4065,8 @@ static int still_busy(void) # include "fake_epoll.h" #endif -// the base set of fds polled: cli, cluster, tun, udp, control, dae -#define BASE_FDS 6 +// the base set of fds polled: cli, cluster, tun, udp (MAX_UDPFD), control, dae, netlink, udplac, pppoedisc, pppoesess +#define BASE_FDS (9 + MAX_UDPFD) // additional polled fds #ifdef BGP @@ -3499,8 +4078,11 @@ static int still_busy(void) // main loop - gets packets on tun or udp and processes them static void mainloop(void) { - int i; + int i, j; uint8_t buf[65536]; + uint8_t *p = buf + 32; // for the hearder of the forwarded MPPP packet (see C_MPPP_FORWARD) + // and the forwarded pppoe session + int size_bufp = sizeof(buf) - 32; 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); @@ -3511,8 +4093,8 @@ static void mainloop(void) exit(1); } - LOG(4, 0, 0, "Beginning of main loop. clifd=%d, cluster_sockfd=%d, tunfd=%d, udpfd=%d, controlfd=%d, daefd=%d\n", - clifd, cluster_sockfd, tunfd, udpfd, controlfd, daefd); + 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, pppoefd=%d, pppoesessfd=%d\n", + clifd, cluster_sockfd, tunfd, udpfd[0], controlfd, daefd, nlfd, udplacfd, pppoediscfd, pppoesessfd); /* setup our fds to poll for input */ { @@ -3537,10 +4119,6 @@ static void mainloop(void) e.data.ptr = &d[i++]; epoll_ctl(epollfd, EPOLL_CTL_ADD, tunfd, &e); - d[i].type = FD_TYPE_UDP; - e.data.ptr = &d[i++]; - epoll_ctl(epollfd, EPOLL_CTL_ADD, udpfd, &e); - d[i].type = FD_TYPE_CONTROL; e.data.ptr = &d[i++]; epoll_ctl(epollfd, EPOLL_CTL_ADD, controlfd, &e); @@ -3548,6 +4126,26 @@ static void mainloop(void) d[i].type = FD_TYPE_DAE; e.data.ptr = &d[i++]; epoll_ctl(epollfd, EPOLL_CTL_ADD, daefd, &e); + + d[i].type = FD_TYPE_NETLINK; + e.data.ptr = &d[i++]; + epoll_ctl(epollfd, EPOLL_CTL_ADD, nlfd, &e); + + d[i].type = FD_TYPE_PPPOEDISC; + e.data.ptr = &d[i++]; + epoll_ctl(epollfd, EPOLL_CTL_ADD, pppoediscfd, &e); + + d[i].type = FD_TYPE_PPPOESESS; + e.data.ptr = &d[i++]; + epoll_ctl(epollfd, EPOLL_CTL_ADD, pppoesessfd, &e); + + for (j = 0; j < config->nbudpfd; j++) + { + d[i].type = FD_TYPE_UDP; + d[i].index = j; + e.data.ptr = &d[i++]; + epoll_ctl(epollfd, EPOLL_CTL_ADD, udpfd[j], &e); + } } #ifdef BGP @@ -3561,7 +4159,8 @@ 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 */ @@ -3608,10 +4207,12 @@ static void mainloop(void) struct in_addr local; socklen_t alen; int c, s; - int udp_ready = 0; + int udp_ready[MAX_UDPFD + 1] = INIT_TABUDPVAR; + int pppoesess_ready = 0; + int pppoesess_pkts = 0; int tun_ready = 0; int cluster_ready = 0; - int udp_pkts = 0; + int udp_pkts[MAX_UDPFD + 1] = INIT_TABUDPVAR; int tun_pkts = 0; int cluster_pkts = 0; #ifdef BGP @@ -3645,30 +4246,37 @@ static void mainloop(void) // these are handled below, with multiple interleaved reads case FD_TYPE_CLUSTER: cluster_ready++; break; case FD_TYPE_TUN: tun_ready++; break; - case FD_TYPE_UDP: udp_ready++; break; + case FD_TYPE_UDP: udp_ready[d->index]++; break; + case FD_TYPE_PPPOESESS: pppoesess_ready++; break; + + case FD_TYPE_PPPOEDISC: // pppoe discovery + s = read(pppoediscfd, p, size_bufp); + if (s > 0) process_pppoe_disc(p, s); + n--; + break; case FD_TYPE_CONTROL: // nsctl commands alen = sizeof(addr); - s = recvfromto(controlfd, buf, sizeof(buf), MSG_WAITALL, (struct sockaddr *) &addr, &alen, &local); - if (s > 0) processcontrol(buf, s, &addr, alen, &local); + s = recvfromto(controlfd, p, size_bufp, MSG_WAITALL, (struct sockaddr *) &addr, &alen, &local); + if (s > 0) processcontrol(p, s, &addr, alen, &local); n--; break; case FD_TYPE_DAE: // DAE requests alen = sizeof(addr); - s = recvfromto(daefd, buf, sizeof(buf), MSG_WAITALL, (struct sockaddr *) &addr, &alen, &local); - if (s > 0) processdae(buf, s, &addr, alen, &local); + s = recvfromto(daefd, p, size_bufp, MSG_WAITALL, (struct sockaddr *) &addr, &alen, &local); + if (s > 0) processdae(p, s, &addr, alen, &local); n--; break; case FD_TYPE_RADIUS: // RADIUS response alen = sizeof(addr); - s = recvfrom(radfds[d->index], buf, sizeof(buf), MSG_WAITALL, (struct sockaddr *) &addr, &alen); + s = recvfrom(radfds[d->index], p, size_bufp, MSG_WAITALL, (struct sockaddr *) &addr, &alen); if (s >= 0 && config->cluster_iam_master) { if (addr.sin_addr.s_addr == config->radiusserver[0] || addr.sin_addr.s_addr == config->radiusserver[1]) - processrad(buf, s, d->index); + processrad(p, s, d->index); else LOG(3, 0, 0, "Dropping RADIUS packet from unknown source %s\n", fmtaddr(addr.sin_addr.s_addr, 0)); @@ -3679,13 +4287,38 @@ static void mainloop(void) #ifdef BGP case FD_TYPE_BGP: - bgp_events[d->index] = events[i].events; - n--; + bgp_events[d->index] = events[i].events; + n--; break; #endif /* BGP */ + case FD_TYPE_NETLINK: + { + struct nlmsghdr *nh = (struct nlmsghdr *)p; + s = netlink_recv(p, size_bufp); + if (nh->nlmsg_type == NLMSG_ERROR) + { + struct nlmsgerr *errmsg = NLMSG_DATA(nh); + if (errmsg->error) + { + if (errmsg->msg.nlmsg_seq < min_initok_nlseqnum) + { + LOG(0, 0, 0, "Got a fatal netlink error (while %s): %s\n", tun_nl_phase_msg[nh->nlmsg_seq], strerror(-errmsg->error)); + exit(1); + } + else + LOG(0, 0, 0, "Got a netlink error: %s\n", strerror(-errmsg->error)); + } + // else it's a ack + } + else + LOG(1, 0, 0, "Got a unknown netlink message: type %d seq %d flags %d\n", nh->nlmsg_type, nh->nlmsg_seq, nh->nlmsg_flags); + n--; + break; + } + default: - LOG(0, 0, 0, "Unexpected fd type returned from epoll_wait: %d\n", d->type); + LOG(0, 0, 0, "Unexpected fd type returned from epoll_wait: %d\n", d->type); } } @@ -3695,33 +4328,51 @@ static void mainloop(void) for (c = 0; n && c < config->multi_read_count; c++) { - // L2TP - if (udp_ready) + for (j = 0; j < config->nbudpfd; j++) { - alen = sizeof(addr); - if ((s = recvfrom(udpfd, buf, sizeof(buf), 0, (void *) &addr, &alen)) > 0) + // L2TP and L2TP REMOTE LNS + if (udp_ready[j]) + { + alen = sizeof(addr); + if ((s = recvfrom(udpfd[j], p, size_bufp, 0, (void *) &addr, &alen)) > 0) + { + processudp(p, s, &addr, j); + udp_pkts[j]++; + } + else + { + udp_ready[j] = 0; + n--; + } + } + } + + // incoming IP + if (tun_ready) + { + if ((s = read(tunfd, p, size_bufp)) > 0) { - processudp(buf, s, &addr); - udp_pkts++; + processtun(p, s); + tun_pkts++; } else { - udp_ready = 0; + tun_ready = 0; n--; } } - // incoming IP - if (tun_ready) + // pppoe session + if (pppoesess_ready) { - if ((s = read(tunfd, buf, sizeof(buf))) > 0) + if ((s = read(pppoesessfd, p, size_bufp)) > 0) { - processtun(buf, s); - tun_pkts++; + process_pppoe_sess(p, s); + pppoesess_pkts++; } else { - tun_ready = 0; + pppoesess_ready = 0; n--; } } @@ -3730,9 +4381,9 @@ static void mainloop(void) if (cluster_ready) { alen = sizeof(addr); - if ((s = recvfrom(cluster_sockfd, buf, sizeof(buf), MSG_WAITALL, (void *) &addr, &alen)) > 0) + if ((s = recvfrom(cluster_sockfd, p, size_bufp, MSG_WAITALL, (void *) &addr, &alen)) > 0) { - processcluster(buf, s, addr.sin_addr.s_addr); + processcluster(p, s, addr.sin_addr.s_addr); cluster_pkts++; } else @@ -3743,18 +4394,22 @@ static void mainloop(void) } } - if (udp_pkts > 1 || tun_pkts > 1 || cluster_pkts > 1) + if (udp_pkts[0] > 1 || tun_pkts > 1 || cluster_pkts > 1) STAT(multi_read_used); if (c >= config->multi_read_count) { - 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); - + LOG(3, 0, 0, "Reached multi_read_count (%d); processed %d udp, %d tun %d cluster and %d pppoe packets\n", + config->multi_read_count, udp_pkts[0], tun_pkts, cluster_pkts, pppoesess_pkts); 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) { @@ -3960,6 +4615,12 @@ 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; + config->ppp_keepalive = 1; + // Set default RDNSS lifetime + config->dns6_lifetime = 1200; log_stream = stderr; @@ -4076,6 +4737,8 @@ static void initdata(int optdebug, char *optconfig) exit(1); } #endif /* BGP */ + + lac_initremotelnsdata(); } static int assign_ip_address(sessionidt s) @@ -4242,18 +4905,18 @@ static void fix_address_pool(int sid) // // Add a block of addresses to the IP pool to hand out. // -static void add_to_ip_pool(in_addr_t addr, in_addr_t mask) +static void add_to_ip_pool(in_addr_t addr, int prefixlen) { int i; - if (mask == 0) - mask = 0xffffffff; // Host route only. + if (prefixlen == 0) + prefixlen = 32; // Host route only. - addr &= mask; + addr &= 0xffffffff << (32 - prefixlen); if (ip_pool_size >= MAXIPPOOL) // Pool is full! return ; - for (i = addr ;(i & mask) == addr; ++i) + for (i = addr ; i < addr+(1<<(32-prefixlen)); ++i) { if ((i & 0xff) == 0 || (i&0xff) == 255) continue; // Skip 0 and broadcast addresses. @@ -4311,7 +4974,7 @@ static void initippool() { // It's a range int numbits = 0; - in_addr_t start = 0, mask = 0; + in_addr_t start = 0; LOG(2, 0, 0, "Adding IP address range %s\n", buf); *p++ = 0; @@ -4321,15 +4984,14 @@ static void initippool() continue; } start = ntohl(inet_addr(pool)); - mask = (in_addr_t) (pow(2, numbits) - 1) << (32 - numbits); // Add a static route for this pool - LOG(5, 0, 0, "Adding route for address pool %s/%u\n", - fmtaddr(htonl(start), 0), 32 + mask); + LOG(5, 0, 0, "Adding route for address pool %s/%d\n", + fmtaddr(htonl(start), 0), numbits); - routeset(0, start, mask, 0, 1); + routeset(0, start, numbits, 0, 1); - add_to_ip_pool(start, mask); + add_to_ip_pool(start, numbits); } else { @@ -4363,7 +5025,7 @@ void snoop_send_packet(uint8_t *packet, uint16_t size, in_addr_t destination, ui static int dump_session(FILE **f, sessiont *s) { - if (!s->opened || !s->ip || !(s->cin_delta || s->cout_delta) || !*s->user || s->walled_garden) + if (!s->opened || (!s->ip && !s->forwardtosession) || !(s->cin_delta || s->cout_delta) || !*s->user || s->walled_garden) return 1; if (!*f) @@ -4382,6 +5044,21 @@ static int dump_session(FILE **f, sessiont *s) } LOG(3, 0, 0, "Dumping accounting information to %s\n", filename); + if(config->account_all_origin) + { + fprintf(*f, "# dslwatch.pl dump file V1.01\n" + "# host: %s\n" + "# endpoint: %s\n" + "# time: %ld\n" + "# uptime: %ld\n" + "# format: username ip qos uptxoctets downrxoctets origin(L=LAC, R=Remote LNS, P=PPPOE)\n", + hostname, + fmtaddr(config->iftun_n_address[tunnel[s->tunnel].indexudp] ? config->iftun_n_address[tunnel[s->tunnel].indexudp] : my_address, 0), + now, + now - basetime); + } + else + { fprintf(*f, "# dslwatch.pl dump file V1.01\n" "# host: %s\n" "# endpoint: %s\n" @@ -4389,18 +5066,32 @@ static int dump_session(FILE **f, sessiont *s) "# uptime: %ld\n" "# format: username ip qos uptxoctets downrxoctets\n", hostname, - fmtaddr(config->bind_address ? config->bind_address : my_address, 0), + fmtaddr(config->iftun_n_address[tunnel[s->tunnel].indexudp] ? config->iftun_n_address[tunnel[s->tunnel].indexudp] : my_address, 0), now, now - basetime); + } } LOG(4, 0, 0, "Dumping accounting information for %s\n", s->user); + if(config->account_all_origin) + { + fprintf(*f, "%s %s %d %u %u %s\n", + s->user, // username + fmtaddr(htonl(s->ip), 0), // ip + (s->throttle_in || s->throttle_out) ? 2 : 1, // qos + (uint32_t) s->cin_delta, // uptxoctets + (uint32_t) s->cout_delta, // downrxoctets + (s->tunnel == TUNNEL_ID_PPPOE)?"P":(tunnel[s->tunnel].isremotelns?"R":"L")); // Origin + } + else if (!tunnel[s->tunnel].isremotelns && (s->tunnel != TUNNEL_ID_PPPOE)) + { fprintf(*f, "%s %s %d %u %u\n", s->user, // username fmtaddr(htonl(s->ip), 0), // ip (s->throttle_in || s->throttle_out) ? 2 : 1, // qos (uint32_t) s->cin_delta, // uptxoctets (uint32_t) s->cout_delta); // downrxoctets + } s->cin_delta = s->cout_delta = 0; @@ -4448,9 +5139,9 @@ int main(int argc, char *argv[]) case 'd': if (fork()) exit(0); setsid(); - freopen("/dev/null", "r", stdin); - freopen("/dev/null", "w", stdout); - freopen("/dev/null", "w", stderr); + if(!freopen("/dev/null", "r", stdin)) LOG(0, 0, 0, "Error freopen stdin: %s\n", strerror(errno)); + if(!freopen("/dev/null", "w", stdout)) LOG(0, 0, 0, "Error freopen stdout: %s\n", strerror(errno)); + if(!freopen("/dev/null", "w", stderr)) LOG(0, 0, 0, "Error freopen stderr: %s\n", strerror(errno)); break; case 'v': optdebug++; @@ -4480,12 +5171,17 @@ 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); LOG(0, 0, 0, "L2TPNS version " VERSION "\n"); + LOG(0, 0, 0, "Copyright (c) 2012, 2013, 2014 ISP FDN & SAMESWIRELESS\n"); LOG(0, 0, 0, "Copyright (c) 2003, 2004, 2005, 2006 Optus Internet Engineering\n"); LOG(0, 0, 0, "Copyright (c) 2002 FireBrick (Andrews & Arnold Ltd / Watchfront Ltd) - GPL licenced\n"); { @@ -4497,7 +5193,7 @@ int main(int argc, char *argv[]) LOG(0, 0, 0, "Can't set ulimit: %s\n", strerror(errno)); // Make core dumps go to /tmp - chdir("/tmp"); + if(chdir("/tmp")) LOG(0, 0, 0, "Error chdir /tmp: %s\n", strerror(errno)); } if (config->scheduler_fifo) @@ -4525,16 +5221,43 @@ int main(int argc, char *argv[]) } } + initnetlink(); + /* Set up the cluster communications port. */ if (cluster_init() < 0) exit(1); inittun(); - LOG(1, 0, 0, "Set up on interface %s\n", config->tundevice); + LOG(1, 0, 0, "Set up on interface %s\n", config->tundevicename); + + if (*config->pppoe_if_to_bind) + { + init_pppoe(); + LOG(1, 0, 0, "Set up on pppoe interface %s\n", config->pppoe_if_to_bind); + } + + if (!config->nbmultiaddress) + { + config->bind_n_address[0] = config->bind_address; + config->nbmultiaddress++; + } + config->nbudpfd = config->nbmultiaddress; + for (i = 0; i < config->nbudpfd; i++) + initudp(&udpfd[i], config->bind_n_address[i]); + initlacudp(); + config->indexlacudpfd = config->nbudpfd; + udpfd[config->indexlacudpfd] = udplacfd; + config->nbudpfd++; + + initcontrol(); + initdae(); + + // Intercept + snoopfd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP); - initudp(); initrad(); initippool(); + dhcpv6_init(); // seed prng { @@ -4764,6 +5487,104 @@ static void update_config() if (!config->radius_dae_port) config->radius_dae_port = DAEPORT; + if(!config->bind_portremotelns) + config->bind_portremotelns = L2TPLACPORT; + if(!config->bind_address_remotelns) + config->bind_address_remotelns = INADDR_ANY; + + if (*config->bind_multi_address) + { + char *sip = config->bind_multi_address; + char *n = sip; + char *e = config->bind_multi_address + strlen(config->bind_multi_address); + config->nbmultiaddress = 0; + + while (*sip && (sip < e)) + { + in_addr_t ip = 0; + uint8_t u = 0; + + while (n < e && (*n == ',' || *n == ' ')) n++; + + while (n < e && (isdigit(*n) || *n == '.')) + { + if (*n == '.') + { + ip = (ip << 8) + u; + u = 0; + } + else + u = u * 10 + *n - '0'; + n++; + } + ip = (ip << 8) + u; + n++; + + if (ip) + { + config->bind_n_address[config->nbmultiaddress] = htonl(ip); + config->iftun_n_address[config->nbmultiaddress] = htonl(ip); + config->nbmultiaddress++; + LOG(1, 0, 0, "Bind address %s\n", fmtaddr(htonl(ip), 0)); + + if (config->nbmultiaddress >= MAX_BINDADDR) break; + } + + sip = n; + } + + if (config->nbmultiaddress >= 1) + { + config->bind_address = config->bind_n_address[0]; + config->iftun_address = config->bind_address; + } + } + + if(!config->iftun_address) + { + config->iftun_address = config->bind_address; + config->iftun_n_address[0] = config->iftun_address; + } + + if (*config->multi_hostname) + { + char *shost = config->multi_hostname; + char *n = shost; + char *e = config->multi_hostname + strlen(config->multi_hostname); + config->nbmultihostname = 0; + + while (*shost && (shost < e)) + { + while ((n < e) && (*n == ' ' || *n == ',' || *n == '\t')) n++; + + i = 0; + while (n < e && (*n != ',') && (*n != '\t')) + { + config->multi_n_hostname[config->nbmultihostname][i] = *n; + n++;i++; + } + + if (i > 0) + { + config->multi_n_hostname[config->nbmultihostname][i] = 0; + LOG(1, 0, 0, "Bind Hostname %s\n", config->multi_n_hostname[config->nbmultihostname]); + config->nbmultihostname++; + if (config->nbmultihostname >= MAX_NBHOSTNAME) break; + } + + shost = n; + } + + if (config->nbmultihostname >= 1) + { + strcpy(hostname, config->multi_n_hostname[0]); + strcpy(config->hostname, hostname); + } + } + + if (!*config->pppoe_ac_name) + strncpy(config->pppoe_ac_name, DEFAULT_PPPOE_AC_NAME, sizeof(config->pppoe_ac_name) - 1); + // re-initialise the random number source initrandom(config->random_device); @@ -4822,6 +5643,7 @@ static void update_config() memcpy(config->old_plugins, config->plugins, sizeof(config->plugins)); if (!config->multi_read_count) config->multi_read_count = 10; if (!config->cluster_address) config->cluster_address = inet_addr(DEFAULT_MCAST_ADDR); + if (!config->cluster_port) config->cluster_port = CLUSTERPORT; if (!*config->cluster_interface) strncpy(config->cluster_interface, DEFAULT_MCAST_INTERFACE, sizeof(config->cluster_interface) - 1); @@ -4898,18 +5720,18 @@ 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) { @@ -4924,7 +5746,6 @@ int sessionsetup(sessionidt s, tunnelidt t) fmtaddr(htonl(session[s].ip), 0)); } - // Make sure this is right session[s].tunnel = t; @@ -4937,13 +5758,13 @@ 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"); + sessionshutdown(i, "Duplicate IP address", CDN_ADMIN_DISC, TERM_ADMIN_RESET); // close radius/routes, etc. continue; } @@ -4951,36 +5772,36 @@ 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)) - sessionkill(i, "Duplicate session for users"); + sessionshutdown(i, "Duplicate session for users", CDN_ADMIN_DISC, TERM_ADMIN_RESET); // close radius/routes, etc. } } // 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++) { - if ((session[s].ip & session[s].route[r].mask) == - (session[s].route[r].ip & session[s].route[r].mask)) + if ((session[s].ip >> (32-session[s].route[r].prefixlen)) == + (session[s].route[r].ip >> (32-session[s].route[r].prefixlen))) routed++; - routeset(s, session[s].route[r].ip, session[s].route[r].mask, 0, 1); + routeset(s, session[s].route[r].ip, session[s].route[r].prefixlen, 0, 1); } // Static IPs need to be routed if not already @@ -5051,22 +5872,22 @@ int load_session(sessionidt s, sessiont *new) for (i = 0; !newip && i < MAXROUTE && (session[s].route[i].ip || new->route[i].ip); i++) if (new->route[i].ip != session[s].route[i].ip || - new->route[i].mask != session[s].route[i].mask) + new->route[i].prefixlen != session[s].route[i].prefixlen) newip++; // needs update if (newip) { - int routed = 0; + int routed = 0; // remove old routes... for (i = 0; i < MAXROUTE && session[s].route[i].ip; i++) { - if ((session[s].ip & session[s].route[i].mask) == - (session[s].route[i].ip & session[s].route[i].mask)) + if ((session[s].ip >> (32-session[s].route[i].prefixlen)) == + (session[s].route[i].ip >> (32-session[s].route[i].prefixlen))) routed++; - routeset(s, session[s].route[i].ip, session[s].route[i].mask, 0, 0); + routeset(s, session[s].route[i].ip, session[s].route[i].prefixlen, 0, 0); } // ...ip @@ -5080,16 +5901,27 @@ int load_session(sessionidt s, sessiont *new) uncache_ipmap(session[s].ip); } + // remove old IPV6 routes... + for (i = 0; i < MAXROUTE6 && session[s].route6[i].ipv6route.s6_addr[0] && session[s].route6[i].ipv6prefixlen; i++) + { + route6set(s, session[s].route6[i].ipv6route, session[s].route6[i].ipv6prefixlen, 0); + } + + if (session[s].ipv6address.s6_addr[0]) + { + route6set(s, session[s].ipv6address, 128, 0); + } + routed = 0; // add new routes... for (i = 0; i < MAXROUTE && new->route[i].ip; i++) { - if ((new->ip & new->route[i].mask) == - (new->route[i].ip & new->route[i].mask)) + if ((new->ip >> (32-new->route[i].prefixlen)) == + (new->route[i].ip >> (32-new->route[i].prefixlen))) routed++; - routeset(s, new->route[i].ip, new->route[i].mask, 0, 1); + routeset(s, new->route[i].ip, new->route[i].prefixlen, 0, 1); } // ...ip @@ -5106,8 +5938,20 @@ int load_session(sessionidt s, sessiont *new) } // check v6 routing - if (new->ipv6prefixlen && new->ppp.ipv6cp == Opened && session[s].ppp.ipv6cp != Opened) - route6set(s, new->ipv6route, new->ipv6prefixlen, 1); + if (new->ppp.ipv6cp == Opened && session[s].ppp.ipv6cp != Opened) + { + for (i = 0; i < MAXROUTE6 && new->route6[i].ipv6prefixlen; i++) + { + route6set(s, new->route6[i].ipv6route, new->route6[i].ipv6prefixlen, 1); + } + } + + if (new->ipv6address.s6_addr[0] && new->ppp.ipv6cp == Opened && session[s].ppp.ipv6cp != Opened) + { + // Check if included in prefix + if (sessionbyipv6(new->ipv6address) != s) + route6set(s, new->ipv6address, 128, 1); + } // check filters if (new->filter_in && (new->filter_in > MAXFILTER || !ip_filters[new->filter_in - 1].name[0])) @@ -5500,7 +6344,7 @@ static tunnelidt new_tunnel() tunnelidt i; for (i = 1; i < MAXTUNNEL; i++) { - if (tunnel[i].state == TUNNELFREE) + if ((tunnel[i].state == TUNNELFREE) && (i != TUNNEL_ID_PPPOE)) { LOG(4, 0, i, "Assigning tunnel ID %u\n", i); if (i > config->cluster_highest_tunnelid) @@ -5554,7 +6398,7 @@ void become_master(void) } } -int cmd_show_hist_idle(struct cli_def *cli, char *command, char **argv, int argc) +int cmd_show_hist_idle(struct cli_def *cli, const char *command, char **argv, int argc) { int s, i; int count = 0; @@ -5592,7 +6436,7 @@ int cmd_show_hist_idle(struct cli_def *cli, char *command, char **argv, int argc return CLI_OK; } -int cmd_show_hist_open(struct cli_def *cli, char *command, char **argv, int argc) +int cmd_show_hist_open(struct cli_def *cli, const char *command, char **argv, int argc) { int s, i; int count = 0; @@ -5817,3 +6661,49 @@ int ip_filter(uint8_t *buf, int len, uint8_t filter) // default deny return 0; } + +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, config->multi_n_hostname[tunnel[t].indexudp][0]?config->multi_n_hostname[tunnel[t].indexudp]: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); +} +