// L2TP Network Server
// Adrian Kennard 2002
-// Copyright (c) 2003, 2004, 2005 Optus Internet Engineering
+// Copyright (c) 2003, 2004, 2005, 2006 Optus Internet Engineering
// Copyright (c) 2002 FireBrick (Andrews & Arnold Ltd / Watchfront Ltd) - GPL licenced
// vim: sw=8 ts=8
-char const *cvs_id_l2tpns = "$Id: l2tpns.c,v 1.84 2005/02/14 06:58:39 bodea Exp $";
-
#include <arpa/inet.h>
#include <assert.h>
#include <errno.h>
#define SYSLOG_NAMES
#include <syslog.h>
#include <malloc.h>
-#include <math.h>
#include <net/route.h>
#include <sys/mman.h>
#include <netdb.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <sys/wait.h>
-#include <linux/if.h>
+#include <net/if.h>
#include <stddef.h>
#include <time.h>
#include <dlfcn.h>
#include <sched.h>
#include <sys/sysinfo.h>
#include <libcli.h>
+#include <linux/netlink.h>
+#include <linux/rtnetlink.h>
#include "md5.h"
#include "l2tpns.h"
#ifdef BGP
#include "bgp.h"
-#endif /* BGP */
+#endif
+
+#ifdef LAC
+#include "l2tplac.h"
+#endif
+#include "pppoe.h"
+
+#ifdef LAC
+char * Vendor_name = "Linux L2TPNS";
+uint32_t call_serial_number = 0;
+#endif
// Globals
configt *config = NULL; // all configuration
+int nlfd = -1; // netlink socket
int tunfd = -1; // tun interface file handle. (network device)
int udpfd = -1; // UDP file handle
+#ifdef LAC
+int udplacfd = -1; // UDP LAC file handle
+#endif
int controlfd = -1; // Control signal handle
int clifd = -1; // Socket listening for CLI connections.
+int daefd = -1; // Socket listening for DAE connections.
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
-static int rand_fd = -1; // Random data source
+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
-static uint32_t sessionid = 0; // session id for radius accounting
+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 = NULL; // file handle for direct logging (i.e. direct into file, not via syslog).
-extern int cluster_sockfd; // Intra-cluster communications socket.
-uint32_t last_id = 0; // Last used PPP SID. Can I kill this?? -- mo
+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
+// Guest change
+char guest_users[10][32]; // Array of guest users
+int guest_accounts_num = 0; // Number of guest users
+
+// calculated from config->l2tp_mtu
+uint16_t MRU = 0; // PPP MRU
+uint16_t MSS = 0; // TCP MSS
struct cli_session_actions *cli_session_actions = NULL; // Pending session changes requested by CLI
struct cli_tunnel_actions *cli_tunnel_actions = NULL; // Pending tunnel changes required by CLI
-static void *ip_hash[256]; // Mapping from IP address to session structures.
+union iphash {
+ sessionidt sess;
+ union iphash *idx;
+} ip_hash[256]; // Mapping from IP address to session structures.
+
struct ipv6radix {
- int sess;
+ sessionidt sess;
struct ipv6radix *branch;
} ipv6_hash[256]; // Mapping from IPv6 address to session structures.
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 char main_quit = 0; // True if we're in the process of exiting.
+static int time_changed = 0; // time_now changed
+char main_quit = 0; // True if we're in the process of exiting.
+static char main_reload = 0; // Re-load pending
linked_list *loaded_plugins;
linked_list *plugins[MAX_PLUGIN_TYPES];
CONFIG("log_file", log_filename, STRING),
CONFIG("pid_file", pid_file, STRING),
CONFIG("random_device", random_device, STRING),
- CONFIG("l2tp_secret", l2tpsecret, STRING),
+ CONFIG("l2tp_secret", l2tp_secret, STRING),
+ CONFIG("l2tp_mtu", l2tp_mtu, INT),
+ 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("primary_dns", default_dns1, IPv4),
CONFIG("secondary_dns", default_dns2, IPv4),
CONFIG("primary_radius", radiusserver[0], IPv4),
CONFIG("primary_radius_port", radiusport[0], SHORT),
CONFIG("secondary_radius_port", radiusport[1], SHORT),
CONFIG("radius_accounting", radius_accounting, BOOL),
+ CONFIG("radius_interim", radius_interim, INT),
CONFIG("radius_secret", radiussecret, STRING),
CONFIG("radius_authtypes", radius_authtypes_s, STRING),
+ CONFIG("radius_dae_port", radius_dae_port, SHORT),
+ CONFIG("radius_bind_min", radius_bind_min, SHORT),
+ CONFIG("radius_bind_max", radius_bind_max, SHORT),
+ CONFIG("allow_duplicate_users", allow_duplicate_users, BOOL),
+ CONFIG("kill_timedout_sessions", kill_timedout_sessions, BOOL),
+ CONFIG("guest_account", guest_user, STRING),
CONFIG("bind_address", bind_address, IPv4),
CONFIG("peer_address", peer_address, IPv4),
CONFIG("send_garp", send_garp, BOOL),
CONFIG("throttle_speed", rl_rate, UNSIGNED_LONG),
CONFIG("throttle_buckets", num_tbfs, INT),
CONFIG("accounting_dir", accounting_dir, STRING),
- CONFIG("setuid", target_uid, INT),
CONFIG("dump_speed", dump_speed, BOOL),
- CONFIG("cleanup_interval", cleanup_interval, INT),
CONFIG("multi_read_count", multi_read_count, INT),
CONFIG("scheduler_fifo", scheduler_fifo, BOOL),
CONFIG("lock_pages", lock_pages, BOOL),
CONFIG("packet_limit", max_packets, INT),
CONFIG("cluster_address", cluster_address, IPv4),
CONFIG("cluster_interface", cluster_interface, STRING),
+ CONFIG("cluster_mcast_ttl", cluster_mcast_ttl, INT),
CONFIG("cluster_hb_interval", cluster_hb_interval, INT),
CONFIG("cluster_hb_timeout", cluster_hb_timeout, INT),
+ CONFIG("cluster_master_min_adv", cluster_master_min_adv, INT),
CONFIG("ipv6_prefix", ipv6_prefix, IPv6),
+ CONFIG("cli_bind_address", cli_bind_address, IPv4),
+ CONFIG("hostname", hostname, STRING),
+#ifdef BGP
+ CONFIG("nexthop_address", nexthop_address, IPv4),
+ CONFIG("nexthop6_address", nexthop6_address, IPv6),
+#endif
+ CONFIG("echo_timeout", echo_timeout, INT),
+ CONFIG("idle_echo_timeout", idle_echo_timeout, INT),
+ CONFIG("iftun_address", iftun_address, IPv4),
+ CONFIG("tundevicename", tundevicename, STRING),
+#ifdef LAC
+ 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),
+#endif
+ 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),
{ NULL, 0, 0, 0 },
};
NULL,
"plugin_pre_auth",
"plugin_post_auth",
- "plugin_packet_rx",
- "plugin_packet_tx",
"plugin_timer",
"plugin_new_session",
"plugin_kill_session",
"plugin_control",
"plugin_radius_response",
+ "plugin_radius_reset",
+ "plugin_radius_account",
"plugin_become_master",
"plugin_new_session_master",
};
static sessionidt shut_acct_n = 0;
tunnelt *tunnel = NULL; // Array of tunnel structures.
+bundlet *bundle = NULL; // Array of bundle structures.
+fragmentationt *frag = NULL; // Array of fragmentation structures.
sessiont *session = NULL; // Array of session structures.
sessionlocalt *sess_local = NULL; // Array of local per-session counters.
radiust *radius = NULL; // Array of radius structures.
ippoolt *ip_address_pool = NULL; // Array of dynamic IP addresses.
-ip_filtert *ip_filters = NULL; // Array of named filters.
+ip_filtert *ip_filters = NULL; // Array of named filters.
static controlt *controlfree = 0;
struct Tstats *_statistics = NULL;
#ifdef RINGBUFFER
struct Tringbuffer *ringbuffer = NULL;
#endif
-static void cache_ipmap(in_addr_t ip, int s);
+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, int s);
+static void cache_ipv6map(struct in6_addr ip, int prefixlen, sessionidt s);
static void free_ip_address(sessionidt s);
static void dump_acct_info(int all);
static void sighup_handler(int sig);
-static void sigalrm_handler(int sig);
-static void sigterm_handler(int sig);
-static void sigquit_handler(int sig);
+static void shutdown_handler(int sig);
static void sigchild_handler(int sig);
-static void build_chap_response(char *challenge, uint8_t id, uint16_t challenge_length, char **challenge_response);
+static void build_chap_response(uint8_t *challenge, uint8_t id, uint16_t challenge_length, uint8_t **challenge_response);
static void update_config(void);
static void read_config_file(void);
static void initplugins(void);
static int add_plugin(char *plugin_name);
static int remove_plugin(char *plugin_name);
static void plugins_done(void);
-static void processcontrol(uint8_t *buf, int len, struct sockaddr_in *addr, int alen);
+static void processcontrol(uint8_t *buf, int len, struct sockaddr_in *addr, int alen, struct in_addr *local);
static tunnelidt new_tunnel(void);
-static int unhide_avp(uint8_t *avp, tunnelidt t, sessionidt s, uint16_t length);
+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);
-// return internal time (10ths since process startup)
-static clockt now(void)
+// 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)
{
struct timeval t;
gettimeofday(&t, 0);
+ if (f) *f = t.tv_sec + t.tv_usec / 1000000.0;
+ if (t.tv_sec != time_now)
+ {
+ 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;
}
clockt backoff(uint8_t try)
{
if (try > 5) try = 5; // max backoff
- return now() + 10 * (1 << try);
+ return now(NULL) + 10 * (1 << try);
}
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
va_end(ap);
}
-void _log_hex(int level, const char *title, const char *data, int maxsize)
+void _log_hex(int level, const char *title, const uint8_t *data, int maxsize)
{
int i, j;
- const uint8_t *d = (const uint8_t *) data;
+ const uint8_t *d = data;
if (config->debug < level) return;
}
}
+// update a counter, accumulating 2^32 wraps
+void increment_counter(uint32_t *counter, uint32_t *wrap, uint32_t delta)
+{
+ uint32_t new = *counter + delta;
+ if (new < *counter)
+ (*wrap)++;
+
+ *counter = new;
+}
+
// initialise the random generator
static void initrandom(char *source)
{
return;
// close previous source, if any
- if (rand_fd >= 0) close(rand_fd);
+ if (rand_fd >= 0)
+ close(rand_fd);
rand_fd = -1;
path, strerror(errno));
}
}
-
- // no source: seed prng
- {
- unsigned seed = time_now ^ getpid();
- LOG(4, 0, 0, "Seeding the pseudo random generator: %u\n", seed);
- srand(seed);
- }
}
// fill buffer with random data
strerror(errno));
// fall back to rand()
- initrandom(0);
+ initrandom(NULL);
}
n = 0;
// 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.
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));
+
+ 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));
- 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;
+ 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)
{
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",
};
//
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;
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)
- {
- LOG(0, 0, 0, "Error setting tun address: %s\n", strerror(errno));
- exit(1);
- }
- /* Bump up the qlen to deal with bursts from the network */
- ifr.ifr_qlen = 1000;
- if (ioctl(ifrfd, SIOCSIFTXQLEN, (void *) &ifr) < 0)
- {
- LOG(0, 0, 0, "Error setting tun queue length: %s\n", strerror(errno));
- exit(1);
- }
- ifr.ifr_flags = IFF_UP;
- if (ioctl(ifrfd, SIOCSIFFLAGS, (void *) &ifr) < 0)
+ tunidx = if_nametoindex(config->tundevicename);
+ if (tunidx == 0)
{
- LOG(0, 0, 0, "Error setting tun flags: %s\n", strerror(errno));
+ LOG(0, 0, 0, "Can't get tun interface index\n");
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;
- // Only setup IPv6 on the tun device if we have a configured prefix
- if (config->ipv6_prefix.s6_addr[0] > 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)
- {
- LOG(0, 0, 0, "Error setting tun IPv6 link local address:"
- " %s\n", strerror(errno));
- }
+ 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));
- // 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)
- {
- LOG(0, 0, 0, "Error setting tun IPv6 global address: %s\n",
- strerror(errno));
+ 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;
+
+ 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_INET;
+ req.ifmsg.ifaddr.ifa_prefixlen = 32;
+ req.ifmsg.ifaddr.ifa_scope = RT_SCOPE_UNIVERSE;
+ req.ifmsg.ifaddr.ifa_index = tunidx;
+
+ 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 port
+// set up UDP ports
static void initudp(void)
{
int on = 1;
int flags = fcntl(udpfd, F_GETFL, 0);
fcntl(udpfd, F_SETFL, flags | O_NONBLOCK);
}
- if (bind(udpfd, (void *) &addr, sizeof(addr)) < 0)
+ if (bind(udpfd, (struct sockaddr *) &addr, sizeof(addr)) < 0)
{
LOG(0, 0, 0, "Error in UDP bind: %s\n", strerror(errno));
exit(1);
}
- snoopfd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
// Control
memset(&addr, 0, sizeof(addr));
addr.sin_port = htons(NSCTL_PORT);
controlfd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
setsockopt(controlfd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on));
- if (bind(controlfd, (void *) &addr, sizeof(addr)) < 0)
+ setsockopt(controlfd, SOL_IP, IP_PKTINFO, &on, sizeof(on)); // recvfromto
+ if (bind(controlfd, (struct sockaddr *) &addr, sizeof(addr)) < 0)
{
LOG(0, 0, 0, "Error in control bind: %s\n", strerror(errno));
exit(1);
}
+
+ // Dynamic Authorization Extensions to RADIUS
+ memset(&addr, 0, sizeof(addr));
+ addr.sin_family = AF_INET;
+ addr.sin_port = htons(config->radius_dae_port);
+ daefd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
+ setsockopt(daefd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on));
+ setsockopt(daefd, SOL_IP, IP_PKTINFO, &on, sizeof(on)); // recvfromto
+ if (bind(daefd, (struct sockaddr *) &addr, sizeof(addr)) < 0)
+ {
+ LOG(0, 0, 0, "Error in DAE bind: %s\n", strerror(errno));
+ exit(1);
+ }
+
+#ifdef LAC
+ // Tunnel to Remote LNS
+ memset(&addr, 0, sizeof(addr));
+ addr.sin_family = AF_INET;
+ addr.sin_port = htons(config->bind_portremotelns);
+ 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(udplacfd, F_GETFL, 0);
+ fcntl(udplacfd, F_SETFL, flags | O_NONBLOCK);
+ }
+ if (bind(udplacfd, (struct sockaddr *) &addr, sizeof(addr)) < 0)
+ {
+ LOG(0, 0, 0, "Error in UDP REMOTE LNS bind: %s\n", strerror(errno));
+ exit(1);
+ }
+#endif
+
+ // Intercept
+ snoopfd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
}
//
// IP address.
//
-static int lookup_ipmap(in_addr_t ip)
+static sessionidt lookup_ipmap(in_addr_t ip)
{
uint8_t *a = (uint8_t *) &ip;
- uint8_t **d = (uint8_t **) ip_hash;
+ union iphash *h = ip_hash;
- if (!(d = (uint8_t **) d[(size_t) *a++])) return 0;
- if (!(d = (uint8_t **) d[(size_t) *a++])) return 0;
- if (!(d = (uint8_t **) d[(size_t) *a++])) return 0;
+ if (!(h = h[*a++].idx)) return 0;
+ if (!(h = h[*a++].idx)) return 0;
+ if (!(h = h[*a++].idx)) return 0;
- return (int) (intptr_t) d[(size_t) *a];
+ return h[*a].sess;
}
-static int lookup_ipv6map(struct in6_addr ip)
+static sessionidt lookup_ipv6map(struct in6_addr ip)
{
struct ipv6radix *curnode;
int i;
sessionidt sessionbyip(in_addr_t ip)
{
- int s = lookup_ipmap(ip);
+ sessionidt s = lookup_ipmap(ip);
CSTAT(sessionbyip);
if (s > 0 && s < MAXSESSION && session[s].opened)
- return (sessionidt) s;
+ return s;
return 0;
}
sessionidt sessionbyipv6(struct in6_addr ip)
{
- int s;
+ sessionidt s;
CSTAT(sessionbyipv6);
if (!memcmp(&config->ipv6_prefix, &ip, 8) ||
- (ip.s6_addr[0] == 0xFE && ip.s6_addr[1] == 0x80 &&
- (ip.s6_addr16[1] == ip.s6_addr16[2] == ip.s6_addr16[3] == 0))) {
+ (ip.s6_addr[0] == 0xFE &&
+ 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]);
} else {
s = lookup_ipv6map(ip);
//
// (It's actually cached in network order)
//
-static void cache_ipmap(in_addr_t ip, int s)
+static void cache_ipmap(in_addr_t ip, sessionidt s)
{
in_addr_t nip = htonl(ip); // MUST be in network order. I.e. MSB must in be ((char *) (&ip))[0]
uint8_t *a = (uint8_t *) &nip;
- uint8_t **d = (uint8_t **) ip_hash;
+ union iphash *h = ip_hash;
int i;
for (i = 0; i < 3; i++)
{
- if (!d[(size_t) a[i]])
- {
- if (!(d[(size_t) a[i]] = calloc(256, sizeof(void *))))
- return;
- }
+ if (!(h[a[i]].idx || (h[a[i]].idx = calloc(256, sizeof(union iphash)))))
+ return;
- d = (uint8_t **) d[(size_t) a[i]];
+ h = h[a[i]].idx;
}
- d[(size_t) a[3]] = (uint8_t *) (intptr_t) s;
+ h[a[3]].sess = s;
if (s > 0)
LOG(4, s, session[s].tunnel, "Caching ip address %s\n", fmtaddr(nip, 0));
cache_ipmap(ip, 0); // Assign it to the NULL session.
}
-static void cache_ipv6map(struct in6_addr ip, int prefixlen, int s)
+static void cache_ipv6map(struct in6_addr ip, int prefixlen, sessionidt s)
{
int i;
int bytes;
//
int cmd_show_ipcache(struct cli_def *cli, char *command, char **argv, int argc)
{
- char **d = (char **) ip_hash, **e, **f, **g;
+ union iphash *d = ip_hash, *e, *f, *g;
int i, j, k, l;
int count = 0;
for (i = 0; i < 256; ++i)
{
- if (!d[i])
+ if (!d[i].idx)
continue;
- e = (char **) d[i];
+
+ e = d[i].idx;
for (j = 0; j < 256; ++j)
{
- if (!e[j])
+ if (!e[j].idx)
continue;
- f = (char **) e[j];
+
+ f = e[j].idx;
for (k = 0; k < 256; ++k)
{
- if (!f[k])
+ if (!f[k].idx)
continue;
- g = (char **)f[k];
+
+ g = f[k].idx;
for (l = 0; l < 256; ++l)
{
- if (!g[l])
+ if (!g[l].sess)
continue;
- cli_print(cli, "%7d %d.%d.%d.%d", (int) (intptr_t) g[l], i, j, k, l);
+
+ cli_print(cli, "%7d %d.%d.%d.%d", g[l].sess, i, j, k, l);
++count;
}
}
if (!t)
{
- static int backtrace_count = 0;
LOG(0, 0, t, "tunnelsend called with 0 as tunnel id\n");
STAT(tunnel_tx_errors);
- log_backtrace(backtrace_count, 5)
+ return;
+ }
+
+ if (t == TUNNEL_ID_PPPOE)
+ {
+ pppoe_sess_send(buf, l, t);
return;
}
if (!tunnel[t].ip)
{
- static int backtrace_count = 0;
LOG(1, 0, t, "Error sending data out tunnel: no remote endpoint (tunnel not set up)\n");
- log_backtrace(backtrace_count, 5)
STAT(tunnel_tx_errors);
return;
}
{
tunnel[t].last = time_now; // control message sent
tunnel[t].retry = backoff(tunnel[t].try); // when to resend
- if (tunnel[t].try > 1)
+ if (tunnel[t].try)
{
STAT(tunnel_retries);
LOG(3, 0, t, "Control message resend try %d\n", tunnel[t].try);
}
}
-
+#ifdef LAC
+ if (sendto((tunnel[t].isremotelns?udplacfd:udpfd), buf, l, 0, (void *) &addr, sizeof(addr)) < 0)
+#else
if (sendto(udpfd, buf, l, 0, (void *) &addr, sizeof(addr)) < 0)
+#endif
{
LOG(0, ntohs((*(uint16_t *) (buf + 6))), t, "Error sending data out tunnel: %s (udpfd=%d, buf=%p, len=%d, dest=%s)\n",
strerror(errno), udpfd, buf, l, inet_ntoa(addr.sin_addr));
return write(tunfd, data, size);
}
+// adjust tcp mss to avoid fragmentation (called only for tcp packets with syn set)
+void adjust_tcp_mss(sessionidt s, tunnelidt t, uint8_t *buf, int len, uint8_t *tcp)
+{
+ int d = (tcp[12] >> 4) * 4;
+ uint8_t *mss = 0;
+ uint8_t *opts;
+ uint8_t *data;
+ uint16_t orig;
+ uint32_t sum;
+
+ if ((tcp[13] & 0x3f) & ~(TCP_FLAG_SYN|TCP_FLAG_ACK)) // only want SYN and SYN,ACK
+ return;
+
+ if (tcp + d > buf + len) // short?
+ return;
+
+ opts = tcp + 20;
+ data = tcp + d;
+
+ while (opts < data)
+ {
+ if (*opts == 2 && opts[1] == 4) // mss option (2), length 4
+ {
+ mss = opts + 2;
+ if (mss + 2 > data) return; // short?
+ break;
+ }
+
+ if (*opts == 0) return; // end of options
+ if (*opts == 1 || !opts[1]) // no op (one byte), or no length (prevent loop)
+ opts++;
+ else
+ opts += opts[1]; // skip over option
+ }
+
+ if (!mss) return; // not found
+ orig = ntohs(*(uint16_t *) mss);
+
+ if (orig <= MSS) return; // mss OK
+
+ LOG(5, s, t, "TCP: %s:%u -> %s:%u SYN%s: adjusted mss from %u to %u\n",
+ fmtaddr(*(in_addr_t *) (buf + 12), 0), ntohs(*(uint16_t *) tcp),
+ fmtaddr(*(in_addr_t *) (buf + 16), 1), ntohs(*(uint16_t *) (tcp + 2)),
+ (tcp[13] & TCP_FLAG_ACK) ? ",ACK" : "", orig, MSS);
+
+ // set mss
+ *(int16_t *) mss = htons(MSS);
+
+ // adjust checksum (see rfc1141)
+ sum = orig + (~MSS & 0xffff);
+ sum += ntohs(*(uint16_t *) (tcp + 16));
+ sum = (sum & 0xffff) + (sum >> 16);
+ *(uint16_t *) (tcp + 16) = htons(sum + (sum >> 16));
+}
+
+void processmpframe(sessionidt s, tunnelidt t, uint8_t *p, uint16_t l, uint8_t extra)
+{
+ uint16_t proto;
+ if (extra) {
+ // Skip the four extra bytes
+ p += 4;
+ l -= 4;
+ }
+
+ if (*p & 1)
+ {
+ proto = *p++;
+ l--;
+ }
+ else
+ {
+ proto = ntohs(*(uint16_t *) p);
+ p += 2;
+ l -= 2;
+ }
+ if (proto == PPPIP)
+ {
+ if (session[s].die)
+ {
+ LOG(4, s, t, "MPPP: Session %d is closing. Don't process PPP packets\n", s);
+ return; // closing session, PPP not processed
+ }
+ session[s].last_packet = session[s].last_data = time_now;
+ processipin(s, t, p, l);
+ }
+ else if (proto == PPPIPV6 && config->ipv6_prefix.s6_addr[0])
+ {
+ if (session[s].die)
+ {
+ LOG(4, s, t, "MPPP: Session %d is closing. Don't process PPP packets\n", s);
+ return; // closing session, PPP not processed
+ }
+
+ session[s].last_packet = session[s].last_data = time_now;
+ processipv6in(s, t, p, l);
+ }
+ else if (proto == PPPIPCP)
+ {
+ session[s].last_packet = session[s].last_data = time_now;
+ processipcp(s, t, p, l);
+ }
+ else if (proto == PPPCCP)
+ {
+ session[s].last_packet = session[s].last_data = time_now;
+ processccp(s, t, p, l);
+ }
+ else
+ {
+ LOG(2, s, t, "MPPP: Unsupported MP protocol 0x%04X received\n",proto);
+ }
+}
+
+static void update_session_out_stat(sessionidt s, sessiont *sp, int len)
+{
+ increment_counter(&sp->cout, &sp->cout_wrap, len); // byte count
+ sp->cout_delta += len;
+ sp->pout++;
+ sp->last_data = time_now;
+
+ sess_local[s].cout += len; // To send to master..
+ sess_local[s].pout++;
+}
+
// 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;
- char *data = buf; // Keep a copy of the originals.
+ uint8_t *data = buf; // Keep a copy of the originals.
int size = len;
- uint8_t b[MAXETHER + 20];
+ uint8_t fragbuf[MAXETHER + 20];
CSTAT(processipout);
if (rate++ < config->icmp_rate) // Only send a max of icmp_rate per second.
{
LOG(4, 0, 0, "IP: Sending ICMP host unreachable to %s\n", fmtaddr(*(in_addr_t *)(buf + 12), 0));
- host_unreachable(*(in_addr_t *)(buf + 12), *(uint16_t *)(buf + 4), ip, buf, (len < 64) ? 64 : len);
+ host_unreachable(*(in_addr_t *)(buf + 12), *(uint16_t *)(buf + 4),
+ config->bind_address ? config->bind_address : my_address, buf, len);
}
return;
}
+
t = session[s].tunnel;
+ if (len > session[s].mru || (session[s].mrru && len > session[s].mrru))
+ {
+ LOG(3, s, t, "Packet size more than session MRU\n");
+ return;
+ }
+
sp = &session[s];
// DoS prevention: enforce a maximum number of packets per 0.1s for a session
if (session[s].filter_out && !ip_filter(buf, len, session[s].filter_out - 1))
return;
+ // adjust MSS on SYN and SYN,ACK packets with options
+ if ((ntohs(*(uint16_t *) (buf + 6)) & 0x1fff) == 0 && buf[9] == IPPROTO_TCP) // first tcp fragment
+ {
+ int ihl = (buf[0] & 0xf) * 4; // length of IP header
+ if (len >= ihl + 20 && (buf[ihl + 13] & TCP_FLAG_SYN) && ((buf[ihl + 12] >> 4) > 5))
+ adjust_tcp_mss(s, t, buf, len, buf + ihl);
+ }
+
if (sp->tbf_out)
{
// Are we throttling this session?
master_throttle_packet(sp->tbf_out, data, size);
return;
}
- else if (sp->walled_garden && !config->cluster_iam_master)
+
+ if (sp->walled_garden && !config->cluster_iam_master)
{
// We are walled-gardening this
master_garden_packet(s, data, size);
return;
}
- LOG(5, s, t, "Ethernet -> Tunnel (%d bytes)\n", len);
+ if(session[s].bundle != 0 && bundle[session[s].bundle].num_of_links > 1)
+ {
- // Add on L2TP header
+ 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...
+
+ // statistics
+ update_session_out_stat(s, sp, fraglen);
+
+ remain -= fraglen;
+ while (remain > last_fraglen)
+ {
+ 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...
+ update_session_out_stat(s, sp, fraglen);
+ remain -= fraglen;
+ }
+ // send the last fragment
+ 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...
+ 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...
+ LOG(4, s, t, "MPPP: packet sent as one frame\n");
+ update_session_out_stat(s, sp, len);
+ }
+ }
+ else
+ {
+ // Send it as one frame (NO MPPP Frame)
+ uint8_t *p = makeppp(fragbuf, sizeof(fragbuf), buf, len, s, t, PPPIP, 0, 0, 0);
+ if (!p) return;
+ tunnelsend(fragbuf, len + (p-fragbuf), t); // send it...
+ update_session_out_stat(s, sp, len);
+ }
+ }
+ else
{
- uint8_t *p = makeppp(b, sizeof(b), buf, len, t, s, PPPIP);
+ uint8_t *p = makeppp(fragbuf, sizeof(fragbuf), buf, len, s, t, PPPIP, 0, 0, 0);
if (!p) return;
- tunnelsend(b, len + (p-b), t); // send it...
+ tunnelsend(fragbuf, len + (p-fragbuf), t); // send it...
+ update_session_out_stat(s, sp, len);
}
// Snooping this session, send it to intercept box
if (sp->snoop_ip && sp->snoop_port)
snoop_send_packet(buf, len, sp->snoop_ip, sp->snoop_port);
- sp->cout += len; // byte count
- sp->total_cout += len; // byte count
- sp->pout++;
udp_tx += len;
- sess_local[s].cout += len; // To send to master..
}
// process outgoing (to tunnel) IPv6
in_addr_t ip;
struct in6_addr ip6;
- char *data = buf; // Keep a copy of the originals.
+ uint8_t *data = buf; // Keep a copy of the originals.
int size = len;
uint8_t b[MAXETHER + 20];
}
return;
}
+ if (session[s].bundle && bundle[session[s].bundle].num_of_links > 1)
+ {
+ bundleidt bid = session[s].bundle;
+ 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;
sp = &session[s];
+ sp->last_data = time_now;
// FIXME: add DoS prevention/filters?
// Add on L2TP header
{
- uint8_t *p = makeppp(b, sizeof(b), buf, len, t, s, PPPIPV6);
+ uint8_t *p = makeppp(b, sizeof(b), buf, len, s, t, PPPIPV6, 0, 0, 0);
if (!p) return;
tunnelsend(b, len + (p-b), t); // send it...
}
if (sp->snoop_ip && sp->snoop_port)
snoop_send_packet(buf, len, sp->snoop_ip, sp->snoop_port);
- sp->cout += len; // byte count
- sp->total_cout += len; // byte count
+ increment_counter(&sp->cout, &sp->cout_wrap, len); // byte count
+ sp->cout_delta += len;
sp->pout++;
udp_tx += len;
+
sess_local[s].cout += len; // To send to master..
+ sess_local[s].pout++;
}
//
{
sessiont *sp;
tunnelidt t;
- in_addr_t ip;
uint8_t b[MAXETHER + 20];
buf += 4;
len -= 4;
- ip = *(in_addr_t *)(buf + 16);
-
if (!session[s].ip)
return;
// Add on L2TP header
{
- uint8_t *p = makeppp(b, sizeof(b), buf, len, t, s, PPPIP);
+ uint8_t *p = makeppp(b, sizeof(b), buf, len, s, t, PPPIP, 0, 0, 0);
if (!p) return;
tunnelsend(b, len + (p-b), t); // send it...
}
if (sp->snoop_ip && sp->snoop_port)
snoop_send_packet(buf, len, sp->snoop_ip, sp->snoop_port);
- sp->cout += len; // byte count
- sp->total_cout += len; // byte count
+ increment_counter(&sp->cout, &sp->cout_wrap, len); // byte count
+ sp->cout_delta += len;
sp->pout++;
udp_tx += len;
+
sess_local[s].cout += len; // To send to master..
+ sess_local[s].pout++;
}
// add an AVP (16 bit)
static void control16(controlt * c, uint16_t avp, uint16_t val, uint8_t m)
{
uint16_t l = (m ? 0x8008 : 0x0008);
- *(uint16_t *) (c->buf + c->length + 0) = htons(l);
- *(uint16_t *) (c->buf + c->length + 2) = htons(0);
- *(uint16_t *) (c->buf + c->length + 4) = htons(avp);
- *(uint16_t *) (c->buf + c->length + 6) = htons(val);
+ c->buf16[c->length/2 + 0] = htons(l);
+ c->buf16[c->length/2 + 1] = htons(0);
+ c->buf16[c->length/2 + 2] = htons(avp);
+ c->buf16[c->length/2 + 3] = htons(val);
c->length += 8;
}
static void control32(controlt * c, uint16_t avp, uint32_t val, uint8_t m)
{
uint16_t l = (m ? 0x800A : 0x000A);
- *(uint16_t *) (c->buf + c->length + 0) = htons(l);
- *(uint16_t *) (c->buf + c->length + 2) = htons(0);
- *(uint16_t *) (c->buf + c->length + 4) = htons(avp);
- *(uint32_t *) (c->buf + c->length + 6) = htonl(val);
+ c->buf16[c->length/2 + 0] = htons(l);
+ c->buf16[c->length/2 + 1] = htons(0);
+ c->buf16[c->length/2 + 2] = htons(avp);
+ *(uint32_t *) &c->buf[c->length + 6] = htonl(val);
c->length += 10;
}
-// add an AVP (32 bit)
+// add an AVP (string)
static void controls(controlt * c, uint16_t avp, char *val, uint8_t m)
{
uint16_t l = ((m ? 0x8000 : 0) + strlen(val) + 6);
- *(uint16_t *) (c->buf + c->length + 0) = htons(l);
- *(uint16_t *) (c->buf + c->length + 2) = htons(0);
- *(uint16_t *) (c->buf + c->length + 4) = htons(avp);
- memcpy(c->buf + c->length + 6, val, strlen(val));
+ c->buf16[c->length/2 + 0] = htons(l);
+ c->buf16[c->length/2 + 1] = htons(0);
+ c->buf16[c->length/2 + 2] = htons(avp);
+ memcpy(&c->buf[c->length + 6], val, strlen(val));
c->length += 6 + strlen(val);
}
// add a binary AVP
-static void controlb(controlt * c, uint16_t avp, char *val, unsigned int len, uint8_t m)
+static void controlb(controlt * c, uint16_t avp, uint8_t *val, unsigned int len, uint8_t m)
{
uint16_t l = ((m ? 0x8000 : 0) + len + 6);
- *(uint16_t *) (c->buf + c->length + 0) = htons(l);
- *(uint16_t *) (c->buf + c->length + 2) = htons(0);
- *(uint16_t *) (c->buf + c->length + 4) = htons(avp);
- memcpy(c->buf + c->length + 6, val, len);
+ c->buf16[c->length/2 + 0] = htons(l);
+ c->buf16[c->length/2 + 1] = htons(0);
+ c->buf16[c->length/2 + 2] = htons(avp);
+ memcpy(&c->buf[c->length + 6], val, len);
c->length += 6 + len;
}
}
assert(c);
c->next = 0;
- *(uint16_t *) (c->buf + 0) = htons(0xC802); // flags/ver
+ c->buf16[0] = htons(0xC802); // flags/ver
c->length = 12;
control16(c, 0, mtype, 1);
return c;
// (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, tunnelidt t, sessionidt s)
+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(s ? session[s].far : 0); // session
- *(uint16_t *) (c->buf + 8) = htons(tunnel[t].ns); // sequence
+ c->buf16[1] = htons(c->length); // length
+ c->buf16[2] = htons(tunnel[t].far); // tunnel
+ c->buf16[3] = htons(far); // session
+ c->buf16[4] = htons(tunnel[t].ns); // sequence
tunnel[t].ns++; // advance sequence
// link in message in to queue
if (tunnel[t].controlc)
}
// add/remove filters from session (-1 = no change)
-static void filter_session(sessionidt s, int filter_in, int filter_out)
+void filter_session(sessionidt s, int filter_in, int filter_out)
{
if (!session[s].opened)
return; // No-one home.
}
// start tidy shutdown of session
-void sessionshutdown(sessionidt s, char *reason)
+void sessionshutdown(sessionidt s, char const *reason, int cdn_result, int cdn_error, int term_cause)
{
int walled_garden = session[s].walled_garden;
-
+ bundleidt b = session[s].bundle;
+ //delete routes only for last session in bundle (in case of MPPP)
+ int del_routes = !b || (bundle[b].num_of_links == 1);
CSTAT(sessionshutdown);
if (!session[s].die)
{
struct param_kill_session data = { &tunnel[session[s].tunnel], &session[s] };
- LOG(2, s, session[s].tunnel, "Shutting down session %d: %s\n", s, reason);
+ LOG(2, s, session[s].tunnel, "Shutting down session %u: %s\n", s, reason);
run_plugins(PLUGIN_KILL_SESSION, &data);
}
- if (!walled_garden && !session[s].die)
+ if (session[s].ip && !walled_garden && !session[s].die)
{
// RADIUS Stop message
- uint16_t r = session[s].radius;
- if (!r)
+ uint16_t r = radiusnew(s);
+ if (r)
{
- if (!(r = radiusnew(s)))
- {
- LOG(1, s, session[s].tunnel, "No free RADIUS sessions for Stop message\n");
- STAT(radius_overflow);
- }
- else
+ // stop, if not already trying
+ if (radius[r].state != RADIUSSTOP)
{
- random_data(radius[r].auth, sizeof(radius[r].auth));
+ radius[r].term_cause = term_cause;
+ radius[r].term_msg = reason;
+ radiussend(r, RADIUSSTOP);
}
}
-
- if (r && radius[r].state != RADIUSSTOP)
- radiussend(r, RADIUSSTOP); // stop, if not already trying
+ else
+ LOG(1, s, session[s].tunnel, "No free RADIUS sessions for Stop message\n");
// Save counters to dump to accounting file
if (*config->accounting_dir && shut_acct_n < sizeof(shut_acct) / sizeof(*shut_acct))
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++;
- 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;
}
if (session[s].ip_pool_index == -1) // static ip
{
- if (!routed) routeset(s, session[s].ip, 0, 0, 0);
+ if (!routed && del_routes) routeset(s, session[s].ip, 0, 0, 0);
session[s].ip = 0;
}
else
free_ip_address(s);
// unroute IPv6, if setup
- if (session[s].flags & SF_IPV6_ROUTED)
+ 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, session[s].tunnel, "MPPP: Dropping member link: %d from bundle %d\n",s,b);
+ if(bundle[b].num_of_links == 0)
+ {
+ bundleclear(b);
+ LOG(3, s, session[s].tunnel, "MPPP: Kill bundle: %d (No remaing member links)\n",b);
+ }
+ else
+ {
+ // Adjust the members array to accomodate the new change
+ uint8_t mem_num = 0;
+ // It should be here num_of_links instead of num_of_links-1 (previous instruction "num_of_links--")
+ if(bundle[b].members[bundle[b].num_of_links] != s)
+ {
+ uint8_t ml;
+ for(ml = 0; ml<bundle[b].num_of_links; ml++)
+ if(bundle[b].members[ml] == s)
+ {
+ mem_num = ml;
+ break;
+ }
+ bundle[b].members[mem_num] = bundle[b].members[bundle[b].num_of_links];
+ LOG(3, s, session[s].tunnel, "MPPP: Adjusted member links array\n");
+
+ // If the killed session is the first of the bundle,
+ // the new first session must be stored in the cache_ipmap
+ // else the function sessionbyip return 0 and the sending not work any more (processipout).
+ if (mem_num == 0)
+ {
+ sessionidt new_s = bundle[b].members[0];
+
+ routed = 0;
+ // Add the route for this session.
+ for (r = 0; r < MAXROUTE && session[new_s].route[r].ip; r++)
+ {
+ int i, prefixlen;
+ in_addr_t ip;
+
+ prefixlen = session[new_s].route[r].prefixlen;
+ ip = session[new_s].route[r].ip;
+
+ if (!prefixlen) prefixlen = 32;
+ ip &= 0xffffffff << (32 - prefixlen); // Force the ip to be the first one in the route.
+
+ for (i = ip; i < ip+(1<<(32-prefixlen)) ; ++i)
+ cache_ipmap(i, new_s);
+ }
+ cache_ipmap(session[new_s].ip, new_s);
+
+ // IPV6 route
+ if (session[new_s].ipv6prefixlen)
+ cache_ipv6map(session[new_s].ipv6route, session[new_s].ipv6prefixlen, new_s);
+ }
+ }
+ }
+
+ cluster_send_bundle(b);
+ }
+ }
if (session[s].throttle_in || session[s].throttle_out) // Unthrottle if throttled.
throttle_session(s, 0, 0);
- { // Send CDN
- controlt *c = controlnew(14); // sending CDN
- control16(c, 1, 3, 1); // result code (admin reasons - TBA make error, general error, add message
- control16(c, 14, s, 1); // assigned session (our end)
- controladd(c, session[s].tunnel, s); // send the message
- }
+ if (cdn_result)
+ {
+ if (session[s].tunnel == TUNNEL_ID_PPPOE)
+ {
+ pppoe_shutdown_session(s);
+ }
+ else
+ {
+ // Send CDN
+ controlt *c = controlnew(14); // sending CDN
+ if (cdn_error)
+ {
+ uint16_t buf[2];
+ buf[0] = htons(cdn_result);
+ buf[1] = htons(cdn_error);
+ controlb(c, 1, (uint8_t *)buf, 4, 1);
+ }
+ else
+ control16(c, 1, cdn_result, 1);
- if (!session[s].die)
- session[s].die = TIME + 150; // Clean up in 15 seconds
+ control16(c, 14, s, 1); // assigned session (our end)
+ controladd(c, session[s].far, session[s].tunnel); // send the message
+ }
+ }
// update filter refcounts
if (session[s].filter_in) ip_filters[session[s].filter_in - 1].used--;
if (session[s].filter_out) ip_filters[session[s].filter_out - 1].used--;
+ // clear PPP state
+ memset(&session[s].ppp, 0, sizeof(session[s].ppp));
+ sess_local[s].lcp.restart = 0;
+ sess_local[s].ipcp.restart = 0;
+ sess_local[s].ipv6cp.restart = 0;
+ sess_local[s].ccp.restart = 0;
+
cluster_send_session(s);
}
-void sendipcp(tunnelidt t, sessionidt s)
+void sendipcp(sessionidt s, tunnelidt t)
{
- uint8_t buf[MAXCONTROL];
- uint16_t r = session[s].radius;
+ uint8_t buf[MAXETHER];
uint8_t *q;
CSTAT(sendipcp);
+ LOG(3, s, t, "IPCP: send ConfigReq\n");
- if (!r)
- r = radiusnew(s);
-
- if (radius[r].state != RADIUSIPCP)
- {
- radius[r].state = RADIUSIPCP;
- radius[r].try = 0;
- }
-
- radius[r].retry = backoff(radius[r].try++);
- if (radius[r].try > 10)
+ if (!session[s].unique_id)
{
- radiusclear(r, s); // Clear radius session.
- sessionshutdown(s, "No reply on IPCP");
- return;
+ if (!++last_id) ++last_id; // skip zero
+ session[s].unique_id = last_id;
}
- q = makeppp(buf,sizeof(buf), 0, 0, t, s, PPPIPCP);
+ q = makeppp(buf, sizeof(buf), 0, 0, s, t, PPPIPCP, 0, 0, 0);
if (!q) return;
*q = ConfigReq;
- q[1] = r << RADIUS_SHIFT; // ID, dont care, we only send one type of request
- *(uint16_t *) (q + 2) = htons(10);
- q[4] = 3;
- q[5] = 6;
+ q[1] = session[s].unique_id & 0xf; // ID, dont care, we only send one type of request
+ *(uint16_t *) (q + 2) = htons(10); // packet length
+ q[4] = 3; // ip address option
+ q[5] = 6; // option length
*(in_addr_t *) (q + 6) = config->peer_address ? config->peer_address :
- config->bind_address ? config->bind_address :
+ config->iftun_address ? config->iftun_address :
my_address; // send my IP
tunnelsend(buf, 10 + (q - buf), t); // send it
- session[s].flags &= ~SF_IPCP_ACKED; // Clear flag.
-
- // If we have an IPv6 prefix length configured, assume we should
- // try to negotiate an IPv6 session as well. Unless we've had a
- // (N)ACK for IPV6CP.
- if (config->ipv6_prefix.s6_addr[0] > 0 &&
- !(session[s].flags & SF_IPV6CP_ACKED) &&
- !(session[s].flags & SF_IPV6_NACKED))
- {
- q = makeppp(buf,sizeof(buf), 0, 0, t, s, PPPIPV6CP);
- if (!q) return;
-
- *q = ConfigReq;
- q[1] = r << RADIUS_SHIFT; // ID, don't care, we
- // only send one type
- // of request
- *(uint16_t *) (q + 2) = htons(14);
- q[4] = 1;
- q[5] = 10;
- *(uint32_t *) (q + 6) = 0; // We'll be prefix::1
- *(uint32_t *) (q + 10) = 0;
- q[13] = 1;
-
- tunnelsend(buf, 14 + (q - buf), t); // send it
- }
+ restart_timer(s, ipcp);
+}
+
+void sendipv6cp(sessionidt s, tunnelidt t)
+{
+ uint8_t buf[MAXETHER];
+ uint8_t *q;
+
+ CSTAT(sendipv6cp);
+ LOG(3, s, t, "IPV6CP: send ConfigReq\n");
+
+ q = makeppp(buf, sizeof(buf), 0, 0, s, t, PPPIPV6CP, 0, 0, 0);
+ if (!q) return;
+
+ *q = ConfigReq;
+ q[1] = session[s].unique_id & 0xf; // ID, don't care, we
+ // only send one type
+ // of request
+ *(uint16_t *) (q + 2) = htons(14);
+ q[4] = 1; // interface identifier option
+ q[5] = 10; // option length
+ *(uint32_t *) (q + 6) = 0; // We'll be prefix::1
+ *(uint32_t *) (q + 10) = 0;
+ q[13] = 1;
+
+ tunnelsend(buf, 14 + (q - buf), t); // send it
+ restart_timer(s, ipv6cp);
+}
+
+static void sessionclear(sessionidt s)
+{
+ memset(&session[s], 0, sizeof(session[s]));
+ memset(&sess_local[s], 0, sizeof(sess_local[s]));
+ memset(&cli_session_actions[s], 0, sizeof(cli_session_actions[s]));
+
+ session[s].tunnel = T_FREE; // Mark it as free.
+ session[s].next = sessionfree;
+ sessionfree = s;
}
// kill a session now
void sessionkill(sessionidt s, char *reason)
{
-
CSTAT(sessionkill);
if (!session[s].opened) // not alive
if (session[s].next)
{
- LOG(0, s, session[s].tunnel, "Tried to kill a session with next pointer set (%d)\n", session[s].next);
+ LOG(0, s, session[s].tunnel, "Tried to kill a session with next pointer set (%u)\n", session[s].next);
return;
}
- session[s].die = TIME;
- sessionshutdown(s, reason); // close radius/routes, etc.
- if (session[s].radius)
- radiusclear(session[s].radius, s); // cant send clean accounting data, session is killed
+ if (!session[s].die)
+ sessionshutdown(s, reason, CDN_ADMIN_DISC, TERM_ADMIN_RESET); // close radius/routes, etc.
- LOG(2, s, session[s].tunnel, "Kill session %d (%s): %s\n", s, session[s].user, reason);
+ if (sess_local[s].radius)
+ radiusclear(sess_local[s].radius, s); // cant send clean accounting data, session is killed
- memset(&session[s], 0, sizeof(session[s]));
- session[s].tunnel = T_FREE; // Mark it as free.
- session[s].next = sessionfree;
- sessionfree = s;
- cli_session_actions[s].action = 0;
+#ifdef LAC
+ 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);
+ }
+ }
+#endif
+
+ LOG(2, s, session[s].tunnel, "Kill session %d (%s): %s\n", s, session[s].user, reason);
+ sessionclear(s);
cluster_send_session(s);
}
tunnel[t].state = TUNNELFREE;
}
+static void bundleclear(bundleidt b)
+{
+ if (!b) return;
+ memset(&bundle[b], 0, sizeof(bundle[b]));
+ bundle[b].state = BUNDLEFREE;
+}
+
// kill a tunnel now
static void tunnelkill(tunnelidt t, char *reason)
{
// free tunnel
tunnelclear(t);
- LOG(1, 0, t, "Kill tunnel %d: %s\n", t, reason);
- cli_tunnel_actions[s].action = 0;
+ LOG(1, 0, t, "Kill tunnel %u: %s\n", t, reason);
+ cli_tunnel_actions[t].action = 0;
cluster_send_tunnel(t);
}
// shut down a tunnel cleanly
-static void tunnelshutdown(tunnelidt t, char *reason)
+static void tunnelshutdown(tunnelidt t, char *reason, int result, int error, char *msg)
{
sessionidt s;
tunnelkill(t, reason);
return;
}
- LOG(1, 0, t, "Shutting down tunnel %d (%s)\n", t, reason);
+ LOG(1, 0, t, "Shutting down tunnel %u (%s)\n", t, reason);
// close session
for (s = 1; s <= config->cluster_highest_sessionid ; ++s)
if (session[s].tunnel == t)
- sessionshutdown(s, reason);
+ sessionshutdown(s, reason, CDN_NONE, TERM_ADMIN_RESET);
tunnel[t].state = TUNNELDIE;
tunnel[t].die = TIME + 700; // Clean up in 70 seconds
cluster_send_tunnel(t);
// TBA - should we wait for sessions to stop?
- { // Send StopCCN
- controlt *c = controlnew(4); // sending StopCCN
- control16(c, 1, 1, 1); // result code (admin reasons - TBA make error, general error, add message)
- control16(c, 9, t, 1); // assigned tunnel (our end)
- controladd(c, t, 0); // send the message
+ if (result)
+ {
+ controlt *c = controlnew(4); // sending StopCCN
+ if (error)
+ {
+ uint16_t buf[32];
+ int l = 4;
+ 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+2, msg, m);
+ l += m;
+ }
+
+ controlb(c, 1, (uint8_t *)buf, l, 1);
+ }
+ else
+ control16(c, 1, result, 1);
+
+ control16(c, 9, t, 1); // assigned tunnel (our end)
+ controladd(c, 0, t); // send the message
}
}
// 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)
{
- char *chapresponse = NULL;
+ uint8_t *chapresponse = NULL;
uint16_t l = len, t = 0, s = 0, ns = 0, nr = 0;
uint8_t *p = buf + 2;
}
if ((buf[1] & 0x0F) != 2)
{
- LOG(1, 0, 0, "Bad L2TP ver %d\n", (buf[1] & 0x0F) != 2);
+ LOG(1, 0, 0, "Bad L2TP ver %d\n", buf[1] & 0x0F);
STAT(tunnel_rx_errors);
return;
}
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);
return;
}
l -= (p - buf);
+
+ // used to time out old tunnels
+ if (t && tunnel[t].state == TUNNELOPEN)
+ tunnel[t].lastrec = time_now;
+
if (*buf & 0x80)
{ // control
uint16_t message = 0xFFFF; // message type
uint8_t fatal = 0;
- uint8_t mandatorymessage = 0;
- uint8_t chap = 0; // if CHAP being used
+ uint8_t mandatory = 0;
uint16_t asession = 0; // assigned session
uint32_t amagic = 0; // magic number
uint8_t aflags = 0; // flags from last LCF
uint16_t version = 0x0100; // protocol version (we handle 0.0 as well and send that back just in case)
- int requestchap = 0; // do we request PAP instead of original CHAP request?
char called[MAXTEL] = ""; // called number
char calling[MAXTEL] = ""; // calling number
return;
}
- if ((*buf & 0xCA) != 0xC8)
+ // control messages must have bits 0x80|0x40|0x08
+ // (type, length and sequence) set, and bits 0x02|0x01
+ // (offset and priority) clear
+ if ((*buf & 0xCB) != 0xC8)
{
LOG(1, s, t, "Bad control header %02X\n", *buf);
STAT(tunnel_rx_errors);
}
}
- LOG(3, s, t, "Control message (%d bytes): (unacked %d) l-ns %d l-nr %d r-ns %d r-nr %d\n",
+ LOG(3, s, t, "Control message (%d bytes): (unacked %d) l-ns %u l-nr %u r-ns %u r-nr %u\n",
l, tunnel[t].controlc, tunnel[t].ns, tunnel[t].nr, ns, nr);
// if no tunnel specified, assign one
tunnel[t].port = ntohs(addr->sin_port);
tunnel[t].window = 4; // default window
STAT(tunnel_created);
- LOG(1, 0, t, " New tunnel from %s:%u ID %d\n",
+ LOG(1, 0, t, " New tunnel from %s:%u ID %u\n",
fmtaddr(htonl(tunnel[t].ip), 0), tunnel[t].port, t);
}
{
// is this the sequence we were expecting?
STAT(tunnel_rx_errors);
- LOG(1, 0, t, " Out of sequence tunnel %d, (%d is not the expected %d)\n",
+ LOG(1, 0, t, " Out of sequence tunnel %u, (%u is not the expected %u)\n",
t, ns, tunnel[t].nr);
if (l) // Is this not a ZLB?
return;
}
- // This is used to time out old tunnels
- tunnel[t].lastrec = time_now;
-
// check sequence of this message
{
int skip = tunnel[t].window; // track how many in-window packets are still in queue
}
if (l)
{ // if not a null message
+ int result = 0;
+ int error = 0;
+ char *msg = 0;
+
+ // Default disconnect cause/message on receipt of CDN. Set to
+ // more specific value from attribute 1 (result code) or 46
+ // (disconnect cause) if present below.
+ int disc_cause_set = 0;
+ int disc_cause = TERM_NAS_REQUEST;
+ char const *disc_reason = "Closed (Received CDN).";
+
// process AVPs
- while (l && !(fatal & 0x80))
+ while (l && !(fatal & 0x80)) // 0x80 = mandatory AVP
{
uint16_t n = (ntohs(*(uint16_t *) p) & 0x3FF);
uint8_t *b = p;
uint8_t flags = *p;
uint16_t mtype;
- p += n; // next
- if (l < n)
+
+ if (n > l)
{
LOG(1, s, t, "Invalid length in AVP\n");
STAT(tunnel_rx_errors);
- fatal = flags;
return;
}
+ p += n; // next
l -= n;
+ if (flags & 0x3C) // reserved bits, should be clear
+ {
+ LOG(1, s, t, "Unrecognised AVP flags %02X\n", *b);
+ fatal = flags;
+ result = 2; // general error
+ error = 3; // reserved field non-zero
+ msg = 0;
+ continue; // next
+ }
+ b += 2;
+ if (*(uint16_t *) (b))
+ {
+ LOG(2, s, t, "Unknown AVP vendor %u\n", ntohs(*(uint16_t *) (b)));
+ fatal = flags;
+ result = 2; // general error
+ error = 6; // generic vendor-specific error
+ msg = "unsupported vendor-specific";
+ continue; // next
+ }
+ b += 2;
+ mtype = ntohs(*(uint16_t *) (b));
+ b += 2;
+ n -= 6;
+
if (flags & 0x40)
{
+ uint16_t orig_len;
+
// handle hidden AVPs
- if (!*config->l2tpsecret)
+ if (!*config->l2tp_secret)
{
LOG(1, s, t, "Hidden AVP requested, but no L2TP secret.\n");
fatal = flags;
+ result = 2; // general error
+ error = 6; // generic vendor-specific error
+ msg = "secret not specified";
continue;
}
if (!session[s].random_vector_length)
{
LOG(1, s, t, "Hidden AVP requested, but no random vector.\n");
fatal = flags;
+ result = 2; // general error
+ error = 6; // generic
+ msg = "no random vector";
continue;
}
- LOG(4, s, t, "Hidden AVP\n");
+ if (n < 8)
+ {
+ LOG(2, s, t, "Short hidden AVP.\n");
+ fatal = flags;
+ result = 2; // general error
+ error = 2; // length is wrong
+ msg = 0;
+ continue;
+ }
+
// Unhide the AVP
- n = unhide_avp(b, t, s, n);
- if (n == 0)
+ unhide_value(b, n, mtype, session[s].random_vector, session[s].random_vector_length);
+
+ orig_len = ntohs(*(uint16_t *) b);
+ if (orig_len > n + 2)
{
+ LOG(1, s, t, "Original length %d too long in hidden AVP of length %d; wrong secret?\n",
+ orig_len, n);
+
fatal = flags;
+ result = 2; // general error
+ error = 2; // length is wrong
+ msg = 0;
continue;
}
+
+ b += 2;
+ n = orig_len;
}
- if (*b & 0x3C)
- {
- LOG(1, s, t, "Unrecognised AVP flags %02X\n", *b);
- fatal = flags;
- continue; // next
- }
- b += 2;
- if (*(uint16_t *) (b))
- {
- LOG(2, s, t, "Unknown AVP vendor %d\n", ntohs(*(uint16_t *) (b)));
- fatal = flags;
- continue; // next
- }
- b += 2;
- mtype = ntohs(*(uint16_t *) (b));
- b += 2;
- n -= 6;
- LOG(4, s, t, " AVP %d (%s) len %d\n", mtype, avp_name(mtype), n);
+ LOG(4, s, t, " AVP %u (%s) len %d%s%s\n", mtype, l2tp_avp_name(mtype), n,
+ flags & 0x40 ? ", hidden" : "", flags & 0x80 ? ", mandatory" : "");
+
switch (mtype)
{
case 0: // message type
message = ntohs(*(uint16_t *) b);
- LOG(4, s, t, " Message type = %d (%s)\n", *b, l2tp_message_type(message));
- mandatorymessage = flags;
+ mandatory = flags & 0x80;
+ LOG(4, s, t, " Message type = %u (%s)\n", message, l2tp_code(message));
break;
case 1: // result code
{
uint16_t rescode = ntohs(*(uint16_t *) b);
- const char* resdesc = "(unknown)";
+ char const *resdesc = "(unknown)";
+ char const *errdesc = NULL;
+ int cause = 0;
+
if (message == 4)
{ /* StopCCN */
- resdesc = stopccn_result_code(rescode);
+ resdesc = l2tp_stopccn_result_code(rescode);
+ cause = TERM_LOST_SERVICE;
}
else if (message == 14)
{ /* CDN */
- resdesc = cdn_result_code(rescode);
+ resdesc = l2tp_cdn_result_code(rescode);
+ if (rescode == 1)
+ cause = TERM_LOST_CARRIER;
+ else
+ cause = TERM_ADMIN_RESET;
}
- LOG(4, s, t, " Result Code %d: %s\n", rescode, resdesc);
+ LOG(4, s, t, " Result Code %u: %s\n", rescode, resdesc);
if (n >= 4)
{
uint16_t errcode = ntohs(*(uint16_t *)(b + 2));
- LOG(4, s, t, " Error Code %d: %s\n", errcode, error_code(errcode));
+ errdesc = l2tp_error_code(errcode);
+ LOG(4, s, t, " Error Code %u: %s\n", errcode, errdesc);
}
if (n > 4)
LOG(4, s, t, " Error String: %.*s\n", n-4, b+4);
+ if (cause && disc_cause_set < mtype) // take cause from attrib 46 in preference
+ {
+ disc_cause_set = mtype;
+ disc_reason = errdesc ? errdesc : resdesc;
+ disc_cause = cause;
+ }
+
break;
}
break;
case 2: // protocol version
{
version = ntohs(*(uint16_t *) (b));
- LOG(4, s, t, " Protocol version = %d\n", version);
+ LOG(4, 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);
fatal = flags;
+ result = 5; // unspported protocol version
+ error = 0x0100; // supported version
+ msg = 0;
continue; // next
}
}
break;
case 3: // framing capabilities
-// LOG(4, s, t, "Framing capabilities\n");
break;
case 4: // bearer capabilities
-// LOG(4, s, t, "Bearer capabilities\n");
break;
case 5: // tie breaker
// We never open tunnels, so we don't care about tie breakers
-// LOG(4, s, t, "Tie breaker\n");
continue;
case 6: // firmware revision
-// LOG(4, s, t, "Firmware revision\n");
break;
case 7: // host name
- memset(tunnel[t].hostname, 0, 128);
- memcpy(tunnel[t].hostname, b, (n >= 127) ? 127 : n);
+ 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);
// TBA - to send to RADIUS
break;
case 8: // vendor name
memset(tunnel[t].vendor, 0, sizeof(tunnel[t].vendor));
- memcpy(tunnel[t].vendor, b, (n >= sizeof(tunnel[t].vendor) - 1) ? sizeof(tunnel[t].vendor) - 1 : n);
+ 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);
break;
case 9: // assigned tunnel
tunnel[t].far = ntohs(*(uint16_t *) (b));
- LOG(4, s, t, " Remote tunnel id = %d\n", tunnel[t].far);
+ LOG(4, 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 = %d\n", tunnel[t].window);
+ LOG(4, s, t, " rx window = %u\n", tunnel[t].window);
break;
case 11: // Challenge
{
}
break;
case 13: // Response
+#ifdef LAC
+ if (tunnel[t].isremotelns)
+ {
+ chapresponse = calloc(17, 1);
+ memcpy(chapresponse, b, (n < 17) ? n : 16);
+ LOG(3, s, t, "received challenge response from REMOTE LNS\n");
+ }
+ else
+#endif /* LAC */
// Why did they send a response? We never challenge.
LOG(2, s, t, " received unexpected challenge response\n");
break;
case 14: // assigned session
asession = session[s].far = ntohs(*(uint16_t *) (b));
- LOG(4, s, t, " assigned session = %d\n", asession);
+ LOG(4, s, t, " assigned session = %u\n", asession);
break;
case 15: // call serial number
- LOG(4, s, t, " call serial number = %d\n", ntohl(*(uint32_t *)b));
+ LOG(4, s, t, " call serial number = %u\n", ntohl(*(uint32_t *)b));
break;
case 18: // bearer type
- LOG(4, s, t, " bearer type = %d\n", ntohl(*(uint32_t *)b));
+ LOG(4, s, t, " bearer type = %u\n", ntohl(*(uint32_t *)b));
// TBA - for RADIUS
break;
case 19: // framing type
- LOG(4, s, t, " framing type = %d\n", ntohl(*(uint32_t *)b));
+ LOG(4, s, t, " framing type = %u\n", ntohl(*(uint32_t *)b));
// TBA
break;
case 21: // called number
- memset(called, 0, MAXTEL);
- memcpy(called, b, (n >= MAXTEL) ? (MAXTEL-1) : n);
+ memset(called, 0, sizeof(called));
+ memcpy(called, b, (n < sizeof(called)) ? n : sizeof(called) - 1);
LOG(4, s, t, " Called <%s>\n", called);
break;
case 22: // calling number
- memset(calling, 0, MAXTEL);
- memcpy(calling, b, (n >= MAXTEL) ? (MAXTEL-1) : n);
+ memset(calling, 0, sizeof(calling));
+ memcpy(calling, b, (n < sizeof(calling)) ? n : sizeof(calling) - 1);
LOG(4, s, t, " Calling <%s>\n", calling);
break;
case 23: // subtype
else
{
// AS5300s send connect speed as a string
- char tmp[30] = {0};
- memcpy(tmp, b, (n >= 30) ? 30 : n);
+ char tmp[30];
+ memset(tmp, 0, sizeof(tmp));
+ 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);
else
{
// AS5300s send connect speed as a string
- char tmp[30] = {0};
- memcpy(tmp, b, (n >= 30) ? 30 : n);
+ char tmp[30];
+ memset(tmp, 0, sizeof(tmp));
+ 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);
case 29: // Proxy Authentication Type
{
uint16_t atype = ntohs(*(uint16_t *)b);
- LOG(4, s, t, " Proxy Auth Type %d (%s)\n", atype, auth_type(atype));
- requestchap = (atype == 2);
+ LOG(4, s, t, " Proxy Auth Type %u (%s)\n", atype, ppp_auth_type(atype));
break;
}
case 30: // Proxy Authentication Name
{
- char authname[64] = {0};
- memcpy(authname, b, (n > 63) ? 63 : n);
+ 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",
authname);
break;
}
case 31: // Proxy Authentication Challenge
{
- memcpy(radius[session[s].radius].auth, b, 16);
LOG(4, 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 (%d)\n", authid);
- if (session[s].radius)
- radius[session[s].radius].id = authid;
+ LOG(4, s, t, " Proxy Auth ID (%u)\n", authid);
break;
}
case 33: // Proxy Authentication Response
- {
- char authresp[64] = {0};
- memcpy(authresp, b, (n > 63) ? 63 : n);
- LOG(4, s, t, " Proxy Auth Response\n");
- break;
- }
- case 27: // last send lcp
+ LOG(4, s, t, " Proxy Auth Response\n");
+ break;
+ case 27: // last sent lcp
{ // find magic number
uint8_t *p = b, *e = p + n;
while (p + 1 < e && p[1] && p + p[1] <= e)
{
if (*p == 5 && p[1] == 6) // Magic-Number
amagic = ntohl(*(uint32_t *) (p + 2));
- else if (*p == 3 && p[1] == 5 && *(uint16_t *) (p + 2) == htons(PPPCHAP) && p[4] == 5) // Authentication-Protocol
- chap = 1;
else if (*p == 7) // Protocol-Field-Compression
- aflags |= SESSIONPFC;
+ aflags |= SESSION_PFC;
else if (*p == 8) // Address-and-Control-Field-Compression
- aflags |= SESSIONACFC;
+ aflags |= SESSION_ACFC;
p += p[1];
}
}
case 36: // Random Vector
LOG(4, 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);
memcpy(session[s].random_vector, b, n);
session[s].random_vector_length = n;
break;
+ case 46: // ppp disconnect cause
+ if (n >= 5)
+ {
+ uint16_t code = ntohs(*(uint16_t *) b);
+ uint16_t proto = ntohs(*(uint16_t *) (b + 2));
+ uint8_t dir = *(b + 4);
+
+ LOG(4, s, t, " PPP disconnect cause "
+ "(code=%u, proto=%04X, dir=%u, msg=\"%.*s\")\n",
+ code, proto, dir, n - 5, b + 5);
+
+ disc_cause_set = mtype;
+
+ switch (code)
+ {
+ case 1: // admin disconnect
+ disc_cause = TERM_ADMIN_RESET;
+ disc_reason = "Administrative disconnect";
+ break;
+ case 3: // lcp terminate
+ if (dir != 2) break; // 1=peer (LNS), 2=local (LAC)
+ disc_cause = TERM_USER_REQUEST;
+ disc_reason = "Normal disconnection";
+ break;
+ case 4: // compulsory encryption unavailable
+ if (dir != 1) break; // 1=refused by peer, 2=local
+ disc_cause = TERM_USER_ERROR;
+ disc_reason = "Compulsory encryption refused";
+ break;
+ case 5: // lcp: fsm timeout
+ disc_cause = TERM_PORT_ERROR;
+ disc_reason = "LCP: FSM timeout";
+ break;
+ case 6: // lcp: no recognisable lcp packets received
+ disc_cause = TERM_PORT_ERROR;
+ disc_reason = "LCP: no recognisable LCP packets";
+ break;
+ case 7: // lcp: magic-no error (possibly looped back)
+ disc_cause = TERM_PORT_ERROR;
+ disc_reason = "LCP: magic-no error (possible loop)";
+ break;
+ case 8: // lcp: echo request timeout
+ disc_cause = TERM_PORT_ERROR;
+ disc_reason = "LCP: echo request timeout";
+ break;
+ case 13: // auth: fsm timeout
+ disc_cause = TERM_SERVICE_UNAVAILABLE;
+ disc_reason = "Authentication: FSM timeout";
+ break;
+ case 15: // auth: unacceptable auth protocol
+ disc_cause = TERM_SERVICE_UNAVAILABLE;
+ disc_reason = "Unacceptable authentication protocol";
+ break;
+ case 16: // auth: authentication failed
+ disc_cause = TERM_SERVICE_UNAVAILABLE;
+ disc_reason = "Authentication failed";
+ break;
+ case 17: // ncp: fsm timeout
+ disc_cause = TERM_SERVICE_UNAVAILABLE;
+ disc_reason = "NCP: FSM timeout";
+ break;
+ case 18: // ncp: no ncps available
+ disc_cause = TERM_SERVICE_UNAVAILABLE;
+ disc_reason = "NCP: no NCPs available";
+ break;
+ case 19: // ncp: failure to converge on acceptable address
+ disc_cause = TERM_SERVICE_UNAVAILABLE;
+ disc_reason = (dir == 1)
+ ? "NCP: too many Configure-Naks received from peer"
+ : "NCP: too many Configure-Naks sent to peer";
+ break;
+ case 20: // ncp: user not permitted to use any address
+ disc_cause = TERM_SERVICE_UNAVAILABLE;
+ disc_reason = (dir == 1)
+ ? "NCP: local link address not acceptable to peer"
+ : "NCP: remote link address not acceptable";
+ break;
+ }
+ }
+ break;
default:
- LOG(2, s, t, " Unknown AVP type %d\n", mtype);
- fatal = flags;
- continue; // next
+ {
+ static char e[] = "unknown AVP 0xXXXX";
+ LOG(2, s, t, " Unknown AVP type %u\n", mtype);
+ fatal = flags;
+ result = 2; // general error
+ error = 8; // unknown mandatory AVP
+ sprintf((msg = e) + 14, "%04x", mtype);
+ continue; // next
+ }
}
}
// process message
if (fatal & 0x80)
- tunnelshutdown(t, "Unknown Mandatory AVP");
+ tunnelshutdown(t, "Invalid mandatory AVP", result, error, msg);
else
switch (message)
{
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, tunnel[t].hostname, 1); // host name (TBA)
+ controls(c, 7, hostname, 1); // host name
if (chapresponse) controlb(c, 13, chapresponse, 16, 1); // Challenge response
control16(c, 9, t, 1); // assigned tunnel
- controladd(c, t, s); // send the resply
+ controladd(c, 0, t); // send the resply
+ }
+ else
+ {
+ tunnelshutdown(t, "Shutting down", 6, 0, 0);
}
- tunnel[t].state = TUNNELOPENING;
break;
case 2: // SCCRP
tunnel[t].state = TUNNELOPEN;
+ tunnel[t].lastrec = time_now;
+#ifdef LAC
+ LOG(3, s, t, "Received SCCRP\n");
+ if (main_quit != QUIT_SHUTDOWN)
+ {
+ if (tunnel[t].isremotelns && chapresponse)
+ {
+ hasht hash;
+
+ lac_calc_rlns_auth(t, 2, hash); // id = 2 (SCCRP)
+ // check authenticator
+ if (memcmp(hash, chapresponse, 16) == 0)
+ {
+ LOG(3, s, t, "sending SCCCN to REMOTE LNS\n");
+ controlt *c = controlnew(3); // sending SCCCN
+ controls(c, 7, hostname, 1); // host name
+ controls(c, 8, Vendor_name, 1); // Vendor name
+ control16(c, 2, version, 1); // protocol version
+ control32(c, 3, 3, 1); // framing Capabilities
+ control16(c, 9, t, 1); // assigned tunnel
+ controladd(c, 0, t); // send
+ }
+ else
+ {
+ tunnelshutdown(t, "Bad chap response from REMOTE LNS", 4, 0, 0);
+ }
+ }
+ }
+ else
+ {
+ tunnelshutdown(t, "Shutting down", 6, 0, 0);
+ }
+#endif /* LAC */
break;
case 3: // SCCN
+ LOG(3, s, t, "Received SCCN\n");
tunnel[t].state = TUNNELOPEN;
+ tunnel[t].lastrec = time_now;
controlnull(t); // ack
break;
case 4: // StopCCN
+ LOG(3, s, t, "Received StopCCN\n");
controlnull(t); // ack
- tunnelshutdown(t, "Stopped"); // Shut down cleanly
- tunnelkill(t, "Stopped"); // Immediately force everything dead
+ 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
- if (!sessionfree)
- {
- STAT(session_overflow);
- LOG(1, 0, t, "No free sessions");
- return;
- }
- else
+ LOG(3, s, t, "Received ICRQ\n");
+ if (sessionfree && main_quit != QUIT_SHUTDOWN)
{
- uint16_t r;
- controlt *c;
+ controlt *c = controlnew(11); // ICRP
+
+ LOG(3, s, t, "Sending ICRP\n");
s = sessionfree;
sessionfree = session[s].next;
if (s > config->cluster_highest_sessionid)
config->cluster_highest_sessionid = s;
- // make a RADIUS session
- if (!(r = radiusnew(s)))
- {
- LOG(1, s, t, "No free RADIUS sessions for ICRQ\n");
- sessionkill(s, "no free RADIUS sesions");
- return;
- }
-
- c = controlnew(11); // sending ICRP
- session[s].id = sessionid++;
session[s].opened = time_now;
session[s].tunnel = t;
session[s].far = asession;
- session[s].last_packet = time_now;
- LOG(3, s, t, "New session (%d/%d)\n", tunnel[t].far, session[s].far);
+ session[s].last_packet = session[s].last_data = time_now;
+ LOG(3, s, t, "New session (%u/%u)\n", tunnel[t].far, session[s].far);
control16(c, 14, s, 1); // assigned session
- controladd(c, t, s); // send the reply
+ controladd(c, asession, t); // send the reply
- // Generate a random challenge
- random_data(radius[r].auth, sizeof(radius[r].auth));
- strncpy(radius[r].calling, calling, sizeof(radius[r].calling) - 1);
strncpy(session[s].called, called, sizeof(session[s].called) - 1);
strncpy(session[s].calling, calling, sizeof(session[s].calling) - 1);
+
+ session[s].ppp.phase = Establish;
+ session[s].ppp.lcp = Starting;
+
STAT(session_created);
+ break;
}
- break;
+
+ {
+ controlt *c = controlnew(14); // CDN
+ LOG(3, s, t, "Sending CDN\n");
+ if (!sessionfree)
+ {
+ STAT(session_overflow);
+ LOG(1, 0, t, "No free sessions\n");
+ control16(c, 1, 4, 0); // temporary lack of resources
+ }
+ else
+ control16(c, 1, 2, 7); // shutting down, try another
+
+ controladd(c, asession, t); // send the message
+ }
+ return;
case 11: // ICRP
- // TBA
+#ifdef LAC
+ LOG(3, s, t, "Received ICRP\n");
+ if (session[s].forwardtosession)
+ {
+ controlt *c = controlnew(12); // ICCN
+
+ session[s].opened = time_now;
+ session[s].tunnel = t;
+ session[s].far = asession;
+ session[s].last_packet = session[s].last_data = time_now;
+
+ control32(c, 19, 1, 1); // Framing Type
+ control32(c, 24, 10000000, 1); // Tx Connect Speed
+ controladd(c, asession, t); // send the message
+ LOG(3, s, t, "Sending ICCN\n");
+ }
+#endif /* LAC */
break;
case 12: // ICCN
+ LOG(3, s, t, "Received ICCN\n");
if (amagic == 0) amagic = time_now;
session[s].magic = amagic; // set magic number
- session[s].l2tp_flags = aflags; // set flags received
- LOG(3, s, t, "Magic %X Flags %X\n", amagic, aflags);
+ session[s].flags = aflags; // set flags received
+ session[s].mru = PPPoE_MRU; // default
controlnull(t); // ack
- // In CHAP state, request PAP instead
- if (requestchap)
- initlcp(t, s);
+
+ // start LCP
+ sess_local[s].lcp_authtype = config->radius_authprefer;
+ sess_local[s].ppp_mru = MRU;
+
+ // Set multilink options before sending initial LCP packet
+ sess_local[s].mp_mrru = 1614;
+ 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, "Closed (Received CDN)");
+ sessionshutdown(s, disc_reason, CDN_NONE, disc_cause);
break;
case 0xFFFF:
LOG(1, s, t, "Missing message type\n");
break;
default:
STAT(tunnel_rx_errors);
- if (mandatorymessage & 0x80)
- tunnelshutdown(t, "Unknown message");
+ if (mandatory)
+ tunnelshutdown(t, "Unknown message type", 2, 6, "unknown message type");
else
- LOG(1, s, t, "Unknown message type %d\n", message);
+ LOG(1, s, t, "Unknown message type %u\n", message);
break;
}
if (chapresponse) free(chapresponse);
}
else
{ // data
- uint16_t prot;
+ uint16_t proto;
LOG_HEX(5, "Receive Tunnel Data", p, l);
if (l > 2 && p[0] == 0xFF && p[1] == 0x03)
}
if (*p & 1)
{
- prot = *p++;
+ proto = *p++;
l--;
}
else
{
- prot = ntohs(*(uint16_t *) p);
+ proto = ntohs(*(uint16_t *) p);
p += 2;
l -= 2;
}
+#ifdef LAC
+ if (session[s].forwardtosession)
+ {
+ LOG(5, s, t, "Forwarding data session to session %u\n", session[s].forwardtosession);
+ // Forward to LAC/BAS or Remote LNS session
+ lac_session_forward(buf, len, s, proto, addr->sin_addr.s_addr, addr->sin_port);
+ 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);
+ }
+ }
+#endif /* LAC */
+
if (s && !session[s].opened) // Is something wrong??
{
if (!config->cluster_iam_master)
return;
}
-
LOG(1, s, t, "UDP packet contains session which is not opened. Dropping packet.\n");
STAT(tunnel_rx_errors);
return;
}
- if (prot == PPPPAP)
+ if (proto == PPPPAP)
{
session[s].last_packet = time_now;
if (!config->cluster_iam_master) { master_forward_packet(buf, len, addr->sin_addr.s_addr, addr->sin_port); return; }
- processpap(t, s, p, l);
+ processpap(s, t, p, l);
}
- else if (prot == PPPCHAP)
+ else if (proto == PPPCHAP)
{
session[s].last_packet = time_now;
if (!config->cluster_iam_master) { master_forward_packet(buf, len, addr->sin_addr.s_addr, addr->sin_port); return; }
- processchap(t, s, p, l);
+ processchap(s, t, p, l);
}
- else if (prot == PPPLCP)
+ else if (proto == PPPLCP)
{
session[s].last_packet = time_now;
if (!config->cluster_iam_master) { master_forward_packet(buf, len, addr->sin_addr.s_addr, addr->sin_port); return; }
- processlcp(t, s, p, l);
+ processlcp(s, t, p, l);
}
- else if (prot == PPPIPCP)
+ else if (proto == PPPIPCP)
{
session[s].last_packet = time_now;
if (!config->cluster_iam_master) { master_forward_packet(buf, len, addr->sin_addr.s_addr, addr->sin_port); return; }
- processipcp(t, s, p, l);
+ processipcp(s, t, p, l);
}
- else if (prot == PPPIPV6CP)
+ else if (proto == PPPIPV6CP && config->ipv6_prefix.s6_addr[0])
{
- if (config->ipv6_prefix.s6_addr[0] > 0)
- {
- session[s].last_packet = time_now;
- if (!config->cluster_iam_master) { master_forward_packet(buf, len, addr->sin_addr.s_addr, addr->sin_port); return; }
- processipv6cp(t, s, p, l);
- }
- else
- {
- LOG(1, s, t, "IPv6 not configured; ignoring IPv6CP\n");
- }
+ session[s].last_packet = time_now;
+ if (!config->cluster_iam_master) { master_forward_packet(buf, len, addr->sin_addr.s_addr, addr->sin_port); return; }
+ processipv6cp(s, t, p, l);
}
- else if (prot == PPPCCP)
+ else if (proto == PPPCCP)
{
session[s].last_packet = time_now;
if (!config->cluster_iam_master) { master_forward_packet(buf, len, addr->sin_addr.s_addr, addr->sin_port); return; }
- processccp(t, s, p, l);
+ processccp(s, t, p, l);
}
- else if (prot == PPPIP)
+ else if (proto == PPPIP)
{
if (session[s].die)
{
- LOG(4, s, t, "Session %d is closing. Don't process PPP packets\n", s);
+ LOG(4, s, t, "Session %u is closing. Don't process PPP packets\n", s);
return; // closing session, PPP not processed
}
- session[s].last_packet = time_now;
+ 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);
return;
}
- processipin(t, s, p, l);
+ processipin(s, t, p, l);
}
- else if (prot == PPPIPV6)
+ else if (proto == PPPMP)
{
- if (!config->ipv6_prefix.s6_addr[0] > 0)
+ if (session[s].die)
+ {
+ LOG(4, s, t, "Session %u is closing. Don't process PPP packets\n", s);
+ return; // closing session, PPP not processed
+ }
+
+ session[s].last_packet = session[s].last_data = time_now;
+ if (!config->cluster_iam_master)
{
- LOG(1, s, t, "IPv6 not configured; yet received IPv6 packet. Ignoring.\n");
+ // The fragments reconstruction is managed by the Master.
+ master_forward_packet(buf, len, addr->sin_addr.s_addr, addr->sin_port);
return;
}
+
+ processmpin(s, t, p, l);
+ }
+ else if (proto == PPPIPV6 && config->ipv6_prefix.s6_addr[0])
+ {
if (session[s].die)
{
- LOG(4, s, t, "Session %d is closing. Don't process PPP packets\n", s);
+ LOG(4, s, t, "Session %u is closing. Don't process PPP packets\n", s);
return; // closing session, PPP not processed
}
- session[s].last_packet = time_now;
+ 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);
return;
}
- processipv6in(t, s, p, l);
+ 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; }
+ protoreject(s, t, p, l, proto);
}
else
{
- STAT(tunnel_rx_errors);
- LOG(1, s, t, "Unknown PPP protocol %04X\n", prot);
+ LOG(2, s, t, "Unknown PPP protocol 0x%04X received in LCP %s state\n",
+ proto, ppp_state(session[s].ppp.lcp));
}
}
}
// 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);
if (*(uint16_t *) (buf + 2) == htons(PKTIP)) // IPv4
processipout(buf, len);
else if (*(uint16_t *) (buf + 2) == htons(PKTIPV6) // IPV6
- && config->ipv6_prefix.s6_addr[0] > 0)
+ && config->ipv6_prefix.s6_addr[0])
processipv6out(buf, len);
// Else discard.
}
-//
-// Maximum number of actions to complete.
-// This is to avoid sending out too many packets
-// at once.
-#define MAX_ACTIONS 500
-
-static int regular_cleanups(void)
+// Handle retries, timeouts. Runs every 1/10th sec, want to ensure
+// that we look at the whole of the tunnel, radius and session tables
+// every second
+static void regular_cleanups(double period)
{
- static sessionidt s = 0; // Next session to check for actions on.
- tunnelidt t;
- int count=0,i;
- uint16_t r;
- static clockt next_acct = 0;
- static clockt next_shut_acct = 0;
+ // Next tunnel, radius and session to check for actions on.
+ static tunnelidt t = 0;
+ static int r = 0;
+ static sessionidt s = 0;
+
+ int t_actions = 0;
+ int r_actions = 0;
+ int s_actions = 0;
+
+ int t_slice;
+ int r_slice;
+ int s_slice;
+
+ int i;
int a;
- LOG(3, 0, 0, "Begin regular cleanup\n");
+ // divide up tables into slices based on the last run
+ t_slice = config->cluster_highest_tunnelid * period;
+ r_slice = (MAXRADIUS - 1) * period;
+ s_slice = config->cluster_highest_sessionid * period;
+
+ if (t_slice < 1)
+ t_slice = 1;
+ else if (t_slice > config->cluster_highest_tunnelid)
+ t_slice = config->cluster_highest_tunnelid;
+
+ if (r_slice < 1)
+ r_slice = 1;
+ else if (r_slice > (MAXRADIUS - 1))
+ r_slice = MAXRADIUS - 1;
+
+ if (s_slice < 1)
+ s_slice = 1;
+ else if (s_slice > config->cluster_highest_sessionid)
+ s_slice = config->cluster_highest_sessionid;
+
+ LOG(4, 0, 0, "Begin regular cleanup (last %f seconds ago)\n", period);
- for (r = 1; r < MAXRADIUS; r++)
+ for (i = 0; i < t_slice; i++)
{
- if (!radius[r].state)
+ t++;
+ if (t > config->cluster_highest_tunnelid)
+ t = 1;
+
+ if (t == TUNNEL_ID_PPPOE)
continue;
- if (radius[r].retry)
- {
- if (radius[r].retry <= TIME)
- radiusretry(r);
- } else
- radius[r].retry = backoff(radius[r].try+1); // Is this really needed? --mo
- }
- for (t = 1; t <= config->cluster_highest_tunnelid; t++)
- {
+
// check for expired tunnels
if (tunnel[t].die && tunnel[t].die <= TIME)
{
STAT(tunnel_timeout);
tunnelkill(t, "Expired");
+ t_actions++;
continue;
}
// check for message resend
if (tunnel[t].retry <= TIME)
{
controlt *c = tunnel[t].controls;
- uint8_t w = tunnel[t].window;
+ uint16_t w = tunnel[t].window;
tunnel[t].try++; // another try
if (tunnel[t].try > 5)
tunnelkill(t, "Timeout on control message"); // game over
tunnelsend(c->buf, c->length, t);
c = c->next;
}
+
+ t_actions++;
}
}
// Send hello
- if (tunnel[t].state == TUNNELOPEN && tunnel[t].lastrec < TIME + 600)
+ if (tunnel[t].state == TUNNELOPEN && !tunnel[t].controlc && (time_now - tunnel[t].lastrec) > 60)
{
controlt *c = controlnew(6); // sending HELLO
- controladd(c, t, 0); // send the message
+ controladd(c, 0, t); // send the message
LOG(3, 0, t, "Sending HELLO message\n");
+ t_actions++;
}
// Check for tunnel changes requested from the CLI
if (a & CLI_TUN_KILL)
{
LOG(2, 0, t, "Dropping tunnel by CLI\n");
- tunnelshutdown(t, "Requested by administrator");
+ tunnelshutdown(t, "Requested by administrator", 1, 0, 0);
+ t_actions++;
}
}
+ }
+ for (i = 0; i < r_slice; i++)
+ {
+ r++;
+ if (r >= MAXRADIUS)
+ r = 1;
+
+ if (!radius[r].state)
+ continue;
+
+ if (radius[r].retry <= TIME)
+ {
+ radiusretry(r);
+ r_actions++;
+ }
}
- count = 0;
- for (i = 1; i <= config->cluster_highest_sessionid; i++)
+ for (i = 0; i < s_slice; i++)
{
s++;
if (s > config->cluster_highest_sessionid)
if (!session[s].opened) // Session isn't in use
continue;
- if (!session[s].die && session[s].ip && !(session[s].flags & SF_IPCP_ACKED))
+ // check for expired sessions
+ if (session[s].die)
{
- // IPCP has not completed yet. Resend
- LOG(3, s, session[s].tunnel, "No ACK for initial IPCP ConfigReq... resending\n");
- sendipcp(session[s].tunnel, s);
+ if (session[s].die <= TIME)
+ {
+ sessionkill(s, "Expired");
+ s_actions++;
+ }
+ continue;
}
- // check for expired sessions
- if (session[s].die && session[s].die <= TIME)
+ // PPP timeouts
+ if (sess_local[s].lcp.restart <= time_now)
{
- sessionkill(s, "Expired");
- if (++count >= MAX_ACTIONS) break;
- continue;
+ int next_state = session[s].ppp.lcp;
+ switch (session[s].ppp.lcp)
+ {
+ case RequestSent:
+ case AckReceived:
+ next_state = RequestSent;
+
+ case AckSent:
+ if (sess_local[s].lcp.conf_sent < config->ppp_max_configure)
+ {
+ LOG(3, s, session[s].tunnel, "No ACK for LCP ConfigReq... resending\n");
+ sendlcp(s, session[s].tunnel);
+ change_state(s, lcp, next_state);
+ }
+ else
+ {
+ sessionshutdown(s, "No response to LCP ConfigReq.", CDN_ADMIN_DISC, TERM_LOST_SERVICE);
+ STAT(session_timeout);
+ }
+
+ s_actions++;
+ }
+
+ if (session[s].die)
+ continue;
}
- // Drop sessions who have not responded within IDLE_TIMEOUT seconds
- if (session[s].last_packet && (time_now - session[s].last_packet >= IDLE_TIMEOUT))
+ if (sess_local[s].ipcp.restart <= time_now)
{
- sessionshutdown(s, "No response to LCP ECHO requests");
+ int next_state = session[s].ppp.ipcp;
+ switch (session[s].ppp.ipcp)
+ {
+ case RequestSent:
+ case AckReceived:
+ next_state = RequestSent;
+
+ case AckSent:
+ if (sess_local[s].ipcp.conf_sent < config->ppp_max_configure)
+ {
+ LOG(3, s, session[s].tunnel, "No ACK for IPCP ConfigReq... resending\n");
+ sendipcp(s, session[s].tunnel);
+ change_state(s, ipcp, next_state);
+ }
+ else
+ {
+ sessionshutdown(s, "No response to IPCP ConfigReq.", CDN_ADMIN_DISC, TERM_LOST_SERVICE);
+ STAT(session_timeout);
+ }
+
+ s_actions++;
+ }
+
+ if (session[s].die)
+ continue;
+ }
+
+ if (sess_local[s].ipv6cp.restart <= time_now)
+ {
+ int next_state = session[s].ppp.ipv6cp;
+ switch (session[s].ppp.ipv6cp)
+ {
+ case RequestSent:
+ case AckReceived:
+ next_state = RequestSent;
+
+ case AckSent:
+ if (sess_local[s].ipv6cp.conf_sent < config->ppp_max_configure)
+ {
+ LOG(3, s, session[s].tunnel, "No ACK for IPV6CP ConfigReq... resending\n");
+ sendipv6cp(s, session[s].tunnel);
+ change_state(s, ipv6cp, next_state);
+ }
+ else
+ {
+ LOG(3, s, session[s].tunnel, "No ACK for IPV6CP ConfigReq\n");
+ change_state(s, ipv6cp, Stopped);
+ }
+
+ s_actions++;
+ }
+ }
+
+ if (sess_local[s].ccp.restart <= time_now)
+ {
+ int next_state = session[s].ppp.ccp;
+ switch (session[s].ppp.ccp)
+ {
+ case RequestSent:
+ case AckReceived:
+ next_state = RequestSent;
+
+ case AckSent:
+ if (sess_local[s].ccp.conf_sent < config->ppp_max_configure)
+ {
+ LOG(3, s, session[s].tunnel, "No ACK for CCP ConfigReq... resending\n");
+ sendccp(s, session[s].tunnel);
+ change_state(s, ccp, next_state);
+ }
+ else
+ {
+ LOG(3, s, session[s].tunnel, "No ACK for CCP ConfigReq\n");
+ change_state(s, ccp, Stopped);
+ }
+
+ s_actions++;
+ }
+ }
+
+ // 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);
- if (++count >= MAX_ACTIONS) break;
+ s_actions++;
continue;
}
- // No data in IDLE_TIMEOUT seconds, send LCP ECHO
- if (session[s].user[0] && (time_now - session[s].last_packet >= ECHO_TIMEOUT))
+ // No data in ECHO_TIMEOUT seconds, send LCP ECHO
+ if (session[s].ppp.phase >= Establish && (time_now - session[s].last_packet >= config->echo_timeout) &&
+ (time_now - sess_local[s].last_echo >= ECHO_TIMEOUT))
{
- uint8_t b[MAXCONTROL] = {0};
+ uint8_t b[MAXETHER];
- uint8_t *q = makeppp(b, sizeof(b), 0, 0, session[s].tunnel, s, PPPLCP);
+ uint8_t *q = makeppp(b, sizeof(b), 0, 0, s, session[s].tunnel, PPPLCP, 1, 0, 0);
if (!q) continue;
*q = EchoReq;
*(uint8_t *)(q + 1) = (time_now % 255); // ID
*(uint16_t *)(q + 2) = htons(8); // Length
- *(uint32_t *)(q + 4) = 0; // Magic Number (not supported)
+ *(uint32_t *)(q + 4) = session[s].ppp.lcp == Opened ? htonl(session[s].magic) : 0; // Magic Number
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
- if (++count >= MAX_ACTIONS) break;
+
+ tunnelsend(b, (q - b) + 8, session[s].tunnel); // send it
+ sess_local[s].last_echo = time_now;
+ s_actions++;
+ }
+
+ // Drop sessions who have reached session_timeout seconds
+ if (session[s].session_timeout)
+ {
+ bundleidt bid = session[s].bundle;
+ if (bid)
+ {
+ if (time_now - bundle[bid].last_check >= 1)
+ {
+ bundle[bid].online_time += (time_now - bundle[bid].last_check) * bundle[bid].num_of_links;
+ bundle[bid].last_check = time_now;
+ if (bundle[bid].online_time >= session[s].session_timeout)
+ {
+ int ses;
+ for (ses = bundle[bid].num_of_links - 1; ses >= 0; ses--)
+ {
+ sessionshutdown(bundle[bid].members[ses], "Session timeout", CDN_ADMIN_DISC, TERM_SESSION_TIMEOUT);
+ s_actions++;
+ continue;
+ }
+ }
+ }
+ }
+ else if (time_now - session[s].opened >= session[s].session_timeout)
+ {
+ sessionshutdown(s, "Session timeout", CDN_ADMIN_DISC, TERM_SESSION_TIMEOUT);
+ s_actions++;
+ continue;
+ }
+ }
+
+ // Drop sessions who have reached idle_timeout seconds
+ if (session[s].last_data && session[s].idle_timeout && (time_now - session[s].last_data >= session[s].idle_timeout))
+ {
+ sessionshutdown(s, "Idle Timeout Reached", CDN_ADMIN_DISC, TERM_IDLE_TIMEOUT);
+ STAT(session_timeout);
+ s_actions++;
+ continue;
}
// Check for actions requested from the CLI
if (a & CLI_SESS_KILL)
{
LOG(2, s, session[s].tunnel, "Dropping session by CLI\n");
- sessionshutdown(s, "Requested by administrator");
+ sessionshutdown(s, "Requested by administrator.", CDN_ADMIN_DISC, TERM_ADMIN_RESET);
a = 0; // dead, no need to check for other actions
+ s_actions++;
}
if (a & CLI_SESS_NOSNOOP)
LOG(2, s, session[s].tunnel, "Unsnooping session by CLI\n");
session[s].snoop_ip = 0;
session[s].snoop_port = 0;
+ s_actions++;
send++;
}
else if (a & CLI_SESS_SNOOP)
{
- LOG(2, s, session[s].tunnel, "Snooping session by CLI (to %s:%d)\n",
+ LOG(2, s, session[s].tunnel, "Snooping session by CLI (to %s:%u)\n",
fmtaddr(cli_session_actions[s].snoop_ip, 0),
cli_session_actions[s].snoop_port);
session[s].snoop_ip = cli_session_actions[s].snoop_ip;
session[s].snoop_port = cli_session_actions[s].snoop_port;
+ s_actions++;
send++;
}
{
LOG(2, s, session[s].tunnel, "Un-throttling session by CLI\n");
throttle_session(s, 0, 0);
+ s_actions++;
send++;
}
else if (a & CLI_SESS_THROTTLE)
cli_session_actions[s].throttle_out);
throttle_session(s, cli_session_actions[s].throttle_in, cli_session_actions[s].throttle_out);
+ s_actions++;
send++;
}
{
LOG(2, s, session[s].tunnel, "Un-filtering session by CLI\n");
filter_session(s, 0, 0);
+ s_actions++;
send++;
}
else if (a & CLI_SESS_FILTER)
cli_session_actions[s].filter_out);
filter_session(s, cli_session_actions[s].filter_in, cli_session_actions[s].filter_out);
+ s_actions++;
send++;
}
if (send)
cluster_send_session(s);
-
- if (++count >= MAX_ACTIONS) break;
}
- }
- if (*config->accounting_dir)
- {
- if (next_acct <= TIME)
+ // RADIUS interim accounting
+ if (config->radius_accounting && config->radius_interim > 0
+ && session[s].ip && !session[s].walled_garden
+ && !sess_local[s].radius // RADIUS already in progress
+ && time_now - sess_local[s].last_interim >= config->radius_interim
+ && session[s].flags & SESSION_STARTED)
{
- // Dump accounting data
- next_acct = TIME + ACCT_TIME;
- next_shut_acct = TIME + ACCT_SHUT_TIME;
- dump_acct_info(1);
- }
- else if (next_shut_acct <= TIME)
- {
- // Dump accounting data for shutdown sessions
- next_shut_acct = TIME + ACCT_SHUT_TIME;
- if (shut_acct_n)
- dump_acct_info(0);
+ int rad = radiusnew(s);
+ if (!rad)
+ {
+ LOG(1, s, session[s].tunnel, "No free RADIUS sessions for Interim message\n");
+ STAT(radius_overflow);
+ continue;
+ }
+
+ LOG(3, s, session[s].tunnel, "Sending RADIUS Interim for %s (%u)\n",
+ session[s].user, session[s].unique_id);
+
+ radiussend(rad, RADIUSINTERIM);
+ sess_local[s].last_interim = time_now;
+ s_actions++;
}
}
- if (count >= MAX_ACTIONS)
- return 1; // Didn't finish!
-
- LOG(3, 0, 0, "End regular cleanup (%d actions), next in %d seconds\n", count, config->cleanup_interval);
- return 0;
+ LOG(4, 0, 0, "End regular cleanup: checked %d/%d/%d tunnels/radius/sessions; %d/%d/%d actions\n",
+ t_slice, r_slice, s_slice, t_actions, r_actions, s_actions);
}
-
//
// Are we in the middle of a tunnel update, or radius
// requests??
int i;
static clockt last_talked = 0;
static clockt start_busy_wait = 0;
+
+#ifdef BGP
+ static time_t stopped_bgp = 0;
+ if (bgp_configured)
+ {
+ if (!stopped_bgp)
+ {
+ 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]);
+
+ stopped_bgp = time_now;
+
+ if (!config->cluster_iam_master)
+ {
+ // we don't want to become master
+ cluster_send_ping(0);
+
+ 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)
+ {
+ static int dropped = 0;
+ if (!dropped)
+ {
+ int i;
+
+ LOG(1, 0, 0, "Dropping sessions and tunnels\n");
+ for (i = 1; i < MAXTUNNEL; i++)
+ if (tunnel[i].ip || tunnel[i].state)
+ tunnelshutdown(i, "L2TPNS Closing", 6, 0, 0);
+
+ dropped = 1;
+ }
+ }
+
if (start_busy_wait == 0)
start_busy_wait = TIME;
if (last_talked != TIME)
{
- LOG(2, 0, 0, "Tunnel %d still has un-acked control messages.\n", i);
+ LOG(2, 0, 0, "Tunnel %u still has un-acked control messages.\n", i);
last_talked = TIME;
}
return 1;
if (last_talked != TIME)
{
- LOG(2, 0, 0, "Radius session %d is still busy (sid %d)\n", i, radius[i].session);
+ LOG(2, 0, 0, "Radius session %u is still busy (sid %u)\n", i, radius[i].session);
last_talked = TIME;
}
return 1;
return 0;
}
-static fd_set readset;
-static int readset_n = 0;
+#ifdef HAVE_EPOLL
+# include <sys/epoll.h>
+#else
+# define FAKE_EPOLL_IMPLEMENTATION /* include the functions */
+# include "fake_epoll.h"
+#endif
+
+#ifdef LAC
+// the base set of fds polled: cli, cluster, tun, udp, control, dae, netlink, udplac, pppoedisc, pppoesess
+#define BASE_FDS 10
+#else
+// the base set of fds polled: cli, cluster, tun, udp, control, dae, netlink, pppoedisc, pppoesess
+#define BASE_FDS 9
+#endif
+
+// additional polled fds
+#ifdef BGP
+# define EXTRA_FDS BGP_NUM_PEERS
+#else
+# define EXTRA_FDS 0
+#endif
// main loop - gets packets on tun or udp and processes them
static void mainloop(void)
{
int i;
uint8_t buf[65536];
- struct timeval to;
+ uint8_t *p = buf + 24; // for the hearder of the forwarded MPPP packet (see C_MPPP_FORWARD)
+ // and the forwarded pppoe session
+ int size_bufp = sizeof(buf) - 24;
clockt next_cluster_ping = 0; // send initial ping immediately
- time_t next_clean = time_now + config->cleanup_interval;
-
- LOG(4, 0, 0, "Beginning of main loop. udpfd=%d, tunfd=%d, cluster_sockfd=%d, controlfd=%d\n",
- udpfd, tunfd, cluster_sockfd, controlfd);
-
- FD_ZERO(&readset);
- FD_SET(udpfd, &readset);
- FD_SET(tunfd, &readset);
- FD_SET(controlfd, &readset);
- FD_SET(clifd, &readset);
- if (cluster_sockfd) FD_SET(cluster_sockfd, &readset);
- readset_n = udpfd;
- if (tunfd > readset_n) readset_n = tunfd;
- if (controlfd > readset_n) readset_n = controlfd;
- if (clifd > readset_n) readset_n = clifd;
- if (cluster_sockfd > readset_n) readset_n = cluster_sockfd;
+ struct epoll_event events[BASE_FDS + RADIUS_FDS + EXTRA_FDS];
+ int maxevent = sizeof(events)/sizeof(*events);
- while (!main_quit || still_busy())
+ if ((epollfd = epoll_create(maxevent)) < 0)
{
- fd_set r;
- int n = readset_n;
-#ifdef BGP
- fd_set w;
- int bgp_set[BGP_NUM_PEERS];
-#endif /* BGP */
+ LOG(0, 0, 0, "epoll_create failed: %s\n", strerror(errno));
+ exit(1);
+ }
- if (config->reload_config)
+#ifdef LAC
+ LOG(4, 0, 0, "Beginning of main loop. clifd=%d, cluster_sockfd=%d, tunfd=%d, udpfd=%d, controlfd=%d, daefd=%d, nlfd=%d , udplacfd=%d, pppoefd=%d, pppoesessfd=%d\n",
+ clifd, cluster_sockfd, tunfd, udpfd, controlfd, daefd, nlfd, udplacfd, pppoediscfd, pppoesessfd);
+#else
+ LOG(4, 0, 0, "Beginning of main loop. clifd=%d, cluster_sockfd=%d, tunfd=%d, udpfd=%d, controlfd=%d, daefd=%d, nlfd=%d, pppoefd=%d, pppoesessfd=%d\n",
+ clifd, cluster_sockfd, tunfd, udpfd, controlfd, daefd, nlfd, pppoediscfd, pppoesessfd);
+#endif
+
+ /* setup our fds to poll for input */
+ {
+ static struct event_data d[BASE_FDS];
+ struct epoll_event e;
+
+ e.events = EPOLLIN;
+ i = 0;
+
+ if (clifd >= 0)
{
- // Update the config state based on config settings
- update_config();
+ d[i].type = FD_TYPE_CLI;
+ e.data.ptr = &d[i++];
+ epoll_ctl(epollfd, EPOLL_CTL_ADD, clifd, &e);
}
- memcpy(&r, &readset, sizeof(fd_set));
- to.tv_sec = 0;
- to.tv_usec = 100000; // 1/10th of a second.
+ d[i].type = FD_TYPE_CLUSTER;
+ e.data.ptr = &d[i++];
+ epoll_ctl(epollfd, EPOLL_CTL_ADD, cluster_sockfd, &e);
+
+ d[i].type = FD_TYPE_TUN;
+ 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);
+
+ 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);
+
+#ifdef LAC
+ d[i].type = FD_TYPE_UDPLAC;
+ e.data.ptr = &d[i++];
+ epoll_ctl(epollfd, EPOLL_CTL_ADD, udplacfd, &e);
+#endif
+
+ 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);
+ }
#ifdef BGP
- FD_ZERO(&w);
- for (i = 0; i < BGP_NUM_PEERS; i++)
+ signal(SIGPIPE, SIG_IGN);
+ bgp_setup(config->as_number);
+ if (config->bind_address)
+ bgp_add_route(config->bind_address, 0xffffffff);
+
+ for (i = 0; i < BGP_NUM_PEERS; i++)
+ {
+ 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, config->neighbour[i].update_source,
+ 0); /* 0 = routing disabled */
+ }
+#endif /* BGP */
+
+ while (!main_quit || still_busy())
+ {
+ int more = 0;
+ int n;
+
+
+ if (main_reload)
{
- bgp_set[i] = bgp_select_state(&bgp_peers[i]);
- if (bgp_set[i] & 1)
- {
- FD_SET(bgp_peers[i].sock, &r);
- if (bgp_peers[i].sock > n)
- n = bgp_peers[i].sock;
- }
+ main_reload = 0;
+ read_config_file();
+ config->reload_config++;
+ }
- if (bgp_set[i] & 2)
- {
- FD_SET(bgp_peers[i].sock, &w);
- if (bgp_peers[i].sock > n)
- n = bgp_peers[i].sock;
- }
+ if (config->reload_config)
+ {
+ config->reload_config = 0;
+ update_config();
}
- n = select(n + 1, &r, &w, 0, &to);
-#else /* BGP */
- n = select(n + 1, &r, 0, 0, &to);
+#ifdef BGP
+ bgp_set_poll();
#endif /* BGP */
+ n = epoll_wait(epollfd, events, maxevent, 100); // timeout 100ms (1/10th sec)
STAT(select_called);
- TIME = now();
+ TIME = now(NULL);
if (n < 0)
{
if (errno == EINTR ||
errno == ECHILD) // EINTR was clobbered by sigchild_handler()
continue;
- LOG(0, 0, 0, "Error returned from select(): %s\n", strerror(errno));
- main_quit++;
- break;
- }
- else if (n)
- {
- struct sockaddr_in addr;
- int alen, c, s;
- int udp_pkts = 0;
- int tun_pkts = 0;
- int cluster_pkts = 0;
+ LOG(0, 0, 0, "Error returned from select(): %s\n", strerror(errno));
+ break; // exit
+ }
+
+ if (n)
+ {
+ struct sockaddr_in addr;
+ struct in_addr local;
+ socklen_t alen;
+ int c, s;
+ int udp_ready = 0;
+#ifdef LAC
+ int udplac_ready = 0;
+ int udplac_pkts = 0;
+#endif
+ int pppoesess_ready = 0;
+ int pppoesess_pkts = 0;
+ int tun_ready = 0;
+ int cluster_ready = 0;
+ int udp_pkts = 0;
+ int tun_pkts = 0;
+ int cluster_pkts = 0;
+#ifdef BGP
+ uint32_t bgp_events[BGP_NUM_PEERS];
+ memset(bgp_events, 0, sizeof(bgp_events));
+#endif /* BGP */
+
+ for (c = n, i = 0; i < c; i++)
+ {
+ struct event_data *d = events[i].data.ptr;
+
+ switch (d->type)
+ {
+ case FD_TYPE_CLI: // CLI connections
+ {
+ int cli;
+
+ alen = sizeof(addr);
+ if ((cli = accept(clifd, (struct sockaddr *)&addr, &alen)) >= 0)
+ {
+ cli_do(cli);
+ close(cli);
+ }
+ else
+ LOG(0, 0, 0, "accept error: %s\n", strerror(errno));
+
+ n--;
+ break;
+ }
+
+ // 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;
+#ifdef LAC
+ case FD_TYPE_UDPLAC: udplac_ready++; break;
+#endif
+ 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);
+ 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);
+ 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);
+ 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);
+ else
+ LOG(3, 0, 0, "Dropping RADIUS packet from unknown source %s\n",
+ fmtaddr(addr.sin_addr.s_addr, 0));
+ }
- // nsctl commands
- if (FD_ISSET(controlfd, &r))
- {
- alen = sizeof(addr);
- processcontrol(buf, recvfrom(controlfd, buf, sizeof(buf), MSG_WAITALL, (void *) &addr, &alen), &addr, alen);
- n--;
- }
+ n--;
+ break;
- // RADIUS responses
- if (config->cluster_iam_master)
- {
- for (i = 0; i < config->num_radfds; i++)
+#ifdef BGP
+ case FD_TYPE_BGP:
+ bgp_events[d->index] = events[i].events;
+ n--;
+ break;
+#endif /* BGP */
+
+ case FD_TYPE_NETLINK:
{
- if (FD_ISSET(radfds[i], &r))
+ struct nlmsghdr *nh = (struct nlmsghdr *)buf;
+ s = netlink_recv(buf, sizeof(buf));
+ if (nh->nlmsg_type == NLMSG_ERROR)
{
- processrad(buf, recv(radfds[i], buf, sizeof(buf), 0), i);
- n--;
+ 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;
}
- }
- // CLI connections
- if (FD_ISSET(clifd, &r))
- {
- int cli;
-
- alen = sizeof(addr);
- if ((cli = accept(clifd, (struct sockaddr *)&addr, &alen)) >= 0)
- {
- cli_do(cli);
- close(cli);
+ default:
+ LOG(0, 0, 0, "Unexpected fd type returned from epoll_wait: %d\n", d->type);
}
- else
- LOG(0, 0, 0, "accept error: %s\n", strerror(errno));
-
- n--;
}
#ifdef BGP
- for (i = 0; i < BGP_NUM_PEERS; i++)
- {
- int isr = bgp_set[i] ? FD_ISSET(bgp_peers[i].sock, &r) : 0;
- int isw = bgp_set[i] ? FD_ISSET(bgp_peers[i].sock, &w) : 0;
- bgp_process(&bgp_peers[i], isr, isw);
- if (isr) n--;
- if (isw) n--;
- }
+ bgp_process(bgp_events);
#endif /* BGP */
for (c = 0; n && c < config->multi_read_count; c++)
{
// L2TP
- if (FD_ISSET(udpfd, &r))
+ if (udp_ready)
{
alen = sizeof(addr);
- if ((s = recvfrom(udpfd, buf, sizeof(buf), 0, (void *) &addr, &alen)) > 0)
+ if ((s = recvfrom(udpfd, p, size_bufp, 0, (void *) &addr, &alen)) > 0)
{
- processudp(buf, s, &addr);
+ processudp(p, s, &addr);
udp_pkts++;
}
else
{
- FD_CLR(udpfd, &r);
+ udp_ready = 0;
n--;
}
}
+#ifdef LAC
+ // L2TP REMOTE LNS
+ if (udplac_ready)
+ {
+ alen = sizeof(addr);
+ if ((s = recvfrom(udplacfd, p, size_bufp, 0, (void *) &addr, &alen)) > 0)
+ {
+ if (!config->disable_lac_func)
+ processudp(p, s, &addr);
+ udplac_pkts++;
+ }
+ else
+ {
+ udplac_ready = 0;
+ n--;
+ }
+ }
+#endif
// incoming IP
- if (FD_ISSET(tunfd, &r))
+ if (tun_ready)
+ {
+ if ((s = read(tunfd, p, size_bufp)) > 0)
+ {
+ processtun(p, s);
+ tun_pkts++;
+ }
+ else
+ {
+ tun_ready = 0;
+ n--;
+ }
+ }
+
+ // 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
{
- FD_CLR(tunfd, &r);
+ pppoesess_ready = 0;
n--;
}
}
// cluster
- if (FD_ISSET(cluster_sockfd, &r))
+ 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
{
- FD_CLR(cluster_sockfd, &r);
+ cluster_ready = 0;
n--;
}
}
if (c >= config->multi_read_count)
{
+#ifdef LAC
+ LOG(3, 0, 0, "Reached multi_read_count (%d); processed %d udp, %d tun %d cluster and %d rmlns packets\n",
+ config->multi_read_count, udp_pkts, tun_pkts, cluster_pkts, udplac_pkts);
+#else
LOG(3, 0, 0, "Reached multi_read_count (%d); processed %d udp, %d tun and %d cluster packets\n",
config->multi_read_count, udp_pkts, tun_pkts, cluster_pkts);
-
+#endif
STAT(multi_read_exceeded);
+ more++;
+ }
+ }
+#ifdef BGP
+ else
+ /* no event received, but timers could still have expired */
+ bgp_process_peers_timers();
+#endif /* BGP */
+
+ if (time_changed)
+ {
+ double Mbps = 1024.0 * 1024.0 / 8 * time_changed;
+
+ // Log current traffic stats
+ snprintf(config->bandwidth, sizeof(config->bandwidth),
+ "UDP-ETH:%1.0f/%1.0f ETH-UDP:%1.0f/%1.0f TOTAL:%0.1f IN:%u OUT:%u",
+ (udp_rx / Mbps), (eth_tx / Mbps), (eth_rx / Mbps), (udp_tx / Mbps),
+ ((udp_tx + udp_rx + eth_tx + eth_rx) / Mbps),
+ udp_rx_pkt / time_changed, eth_rx_pkt / time_changed);
+
+ udp_tx = udp_rx = 0;
+ udp_rx_pkt = eth_rx_pkt = 0;
+ eth_tx = eth_rx = 0;
+ time_changed = 0;
+
+ if (config->dump_speed)
+ printf("%s\n", config->bandwidth);
+
+ // Update the internal time counter
+ strftime(time_now_string, sizeof(time_now_string), "%Y-%m-%d %H:%M:%S", localtime(&time_now));
+
+ {
+ // Run timer hooks
+ struct param_timer p = { time_now };
+ run_plugins(PLUGIN_TIMER, &p);
}
}
// Runs on every machine (master and slaves).
- if (cluster_sockfd && next_cluster_ping <= TIME)
+ if (next_cluster_ping <= TIME)
{
// Check to see which of the cluster is still alive..
next_cluster_ping = TIME + config->cluster_hb_interval;
}
+ if (!config->cluster_iam_master)
+ continue;
+
// Run token bucket filtering queue..
// Only run it every 1/10th of a second.
- // Runs on all machines both master and slave.
{
static clockt last_run = 0;
if (last_run != TIME)
}
}
- /* Handle timeouts. Make sure that this gets run anyway, even if there was
- * something to read, else under load this will never actually run....
- *
- */
- if (config->cluster_iam_master && next_clean <= time_now)
+ // Handle timeouts, retries etc.
{
- if (regular_cleanups())
+ static double last_clean = 0;
+ double this_clean;
+ double diff;
+
+ TIME = now(&this_clean);
+ diff = this_clean - last_clean;
+
+ // Run during idle time (after we've handled
+ // all incoming packets) or every 1/10th sec
+ if (!more || diff > 0.1)
{
- // Did it finish?
- next_clean = time_now + 1 ; // Didn't finish. Check quickly.
+ regular_cleanups(diff);
+ last_clean = this_clean;
}
- else
+ }
+
+ if (*config->accounting_dir)
+ {
+ static clockt next_acct = 0;
+ static clockt next_shut_acct = 0;
+
+ if (next_acct <= TIME)
{
- next_clean = time_now + config->cleanup_interval; // Did. Move to next interval.
+ // Dump accounting data
+ next_acct = TIME + ACCT_TIME;
+ next_shut_acct = TIME + ACCT_SHUT_TIME;
+ dump_acct_info(1);
+ }
+ else if (next_shut_acct <= TIME)
+ {
+ // Dump accounting data for shutdown sessions
+ next_shut_acct = TIME + ACCT_SHUT_TIME;
+ if (shut_acct_n)
+ dump_acct_info(0);
}
}
}
//
// Important!!! We MUST not process any packets past this point!
+ LOG(1, 0, 0, "Shutdown complete\n");
}
static void stripdomain(char *host)
{
int i;
- if (!(_statistics = shared_malloc(sizeof(struct Tstats))))
- {
- LOG(0, 0, 0, "Error doing malloc for _statistics: %s\n", strerror(errno));
- exit(1);
- }
if (!(config = shared_malloc(sizeof(configt))))
{
- LOG(0, 0, 0, "Error doing malloc for configuration: %s\n", strerror(errno));
+ fprintf(stderr, "Error doing malloc for configuration: %s\n", strerror(errno));
exit(1);
}
+
memset(config, 0, sizeof(configt));
time(&config->start_time);
strncpy(config->config_file, optconfig, strlen(optconfig));
config->debug = optdebug;
config->num_tbfs = MAXTBFS;
config->rl_rate = 28; // 28kbps
+ config->cluster_mcast_ttl = 1;
+ config->cluster_master_min_adv = 1;
+ config->ppp_restart_time = 3;
+ config->ppp_max_configure = 10;
+ config->ppp_max_failure = 5;
+ config->kill_timedout_sessions = 1;
strcpy(config->random_device, RANDOMDEVICE);
+ // Set default value echo_timeout and idle_echo_timeout
+ config->echo_timeout = ECHO_TIMEOUT;
+ config->idle_echo_timeout = IDLE_ECHO_TIMEOUT;
+ log_stream = stderr;
+
+#ifdef RINGBUFFER
+ if (!(ringbuffer = shared_malloc(sizeof(struct Tringbuffer))))
+ {
+ LOG(0, 0, 0, "Error doing malloc for ringbuffer: %s\n", strerror(errno));
+ exit(1);
+ }
+ memset(ringbuffer, 0, sizeof(struct Tringbuffer));
+#endif
+
+ if (!(_statistics = shared_malloc(sizeof(struct Tstats))))
+ {
+ LOG(0, 0, 0, "Error doing malloc for _statistics: %s\n", strerror(errno));
+ exit(1);
+ }
if (!(tunnel = shared_malloc(sizeof(tunnelt) * MAXTUNNEL)))
{
LOG(0, 0, 0, "Error doing malloc for tunnels: %s\n", strerror(errno));
exit(1);
}
+ if (!(bundle = shared_malloc(sizeof(bundlet) * MAXBUNDLE)))
+ {
+ LOG(0, 0, 0, "Error doing malloc for bundles: %s\n", strerror(errno));
+ exit(1);
+ }
+ if (!(frag = shared_malloc(sizeof(fragmentationt) * MAXBUNDLE)))
+ {
+ LOG(0, 0, 0, "Error doing malloc for fragmentations: %s\n", strerror(errno));
+ exit(1);
+ }
if (!(session = shared_malloc(sizeof(sessiont) * MAXSESSION)))
{
LOG(0, 0, 0, "Error doing malloc for sessions: %s\n", strerror(errno));
}
memset(ip_filters, 0, sizeof(ip_filtert) * MAXFILTER);
-#ifdef RINGBUFFER
- if (!(ringbuffer = shared_malloc(sizeof(struct Tringbuffer))))
- {
- LOG(0, 0, 0, "Error doing malloc for ringbuffer: %s\n", strerror(errno));
- exit(1);
- }
- memset(ringbuffer, 0, sizeof(struct Tringbuffer));
-#endif
-
if (!(cli_session_actions = shared_malloc(sizeof(struct cli_session_actions) * MAXSESSION)))
{
LOG(0, 0, 0, "Error doing malloc for cli session actions: %s\n", strerror(errno));
memset(cli_tunnel_actions, 0, sizeof(struct cli_tunnel_actions) * MAXSESSION);
memset(tunnel, 0, sizeof(tunnelt) * MAXTUNNEL);
+ memset(bundle, 0, sizeof(bundlet) * MAXBUNDLE);
memset(session, 0, sizeof(sessiont) * MAXSESSION);
memset(radius, 0, sizeof(radiust) * MAXRADIUS);
memset(ip_address_pool, 0, sizeof(ippoolt) * MAXIPPOOL);
for (i = 1; i < MAXTUNNEL; i++)
tunnel[i].state = TUNNELUNDEF; // mark it as not filled in.
+ for (i = 1; i < MAXBUNDLE; i++) {
+ bundle[i].state = BUNDLEUNDEF;
+ }
+
if (!*hostname)
{
// Grab my hostname unless it's been specified
exit(1);
}
#endif /* BGP */
+
+#ifdef LAC
+ lac_initremotelnsdata();
+#endif
}
static int assign_ip_address(sessionidt s)
if (ipid < 1) // Not found in the pool either? good.
continue;
- LOG(0, i, 0, "Session %d has an IP address (%s) that was marked static, but is in the pool (%d)!\n",
+ LOG(0, i, 0, "Session %u has an IP address (%s) that was marked static, but is in the pool (%d)!\n",
i, fmtaddr(session[i].ip, 0), ipid);
// Fall through and process it as part of the pool.
if (ipid > MAXIPPOOL || ipid < 0)
{
- LOG(0, i, 0, "Session %d has a pool IP that's not found in the pool! (%d)\n", i, ipid);
+ LOG(0, i, 0, "Session %u has a pool IP that's not found in the pool! (%d)\n", i, ipid);
ipid = -1;
session[i].ip_pool_index = ipid;
continue;
//
// 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.
{
// 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;
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
{
// It's a single ip address
- add_to_ip_pool(inet_addr(pool), 0);
+ add_to_ip_pool(ntohl(inet_addr(pool)), 0);
}
}
fclose(f);
LOG(1, 0, 0, "IP address pool is %d addresses\n", ip_pool_size - 1);
}
-void snoop_send_packet(char *packet, uint16_t size, in_addr_t destination, uint16_t port)
+void snoop_send_packet(uint8_t *packet, uint16_t size, in_addr_t destination, uint16_t port)
{
struct sockaddr_in snoop_addr = {0};
if (!destination || !port || snoopfd <= 0 || size <= 0 || !packet)
snoop_addr.sin_addr.s_addr = destination;
snoop_addr.sin_port = ntohs(port);
- LOG(5, 0, 0, "Snooping %d byte packet to %s:%d\n", size,
+ LOG(5, 0, 0, "Snooping %d byte packet to %s:%u\n", size,
fmtaddr(snoop_addr.sin_addr.s_addr, 0),
htons(snoop_addr.sin_port));
static int dump_session(FILE **f, sessiont *s)
{
- if (!s->opened || !s->ip || !(s->cin || s->cout) || !*s->user || s->walled_garden)
+#ifdef LAC
+ if (!s->opened || (!s->ip && !s->forwardtosession) || !(s->cin_delta || s->cout_delta) || !*s->user || s->walled_garden)
+#else
+ if (!s->opened || !s->ip || !(s->cin_delta || s->cout_delta) || !*s->user || s->walled_garden)
+#endif
return 1;
if (!*f)
LOG(3, 0, 0, "Dumping accounting information to %s\n", filename);
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\n",
hostname,
+ fmtaddr(config->iftun_address ? config->iftun_address : my_address, 0),
now,
now - basetime);
}
s->user, // username
fmtaddr(htonl(s->ip), 0), // ip
(s->throttle_in || s->throttle_out) ? 2 : 1, // qos
- (uint32_t) s->cin, // uptxoctets
- (uint32_t) s->cout); // downrxoctets
+ (uint32_t) s->cin_delta, // uptxoctets
+ (uint32_t) s->cout_delta); // downrxoctets
- s->pin = s->cin = 0;
- s->pout = s->cout = 0;
+ s->cin_delta = s->cout_delta = 0;
return 1;
}
// Start the timer routine off
time(&time_now);
strftime(time_now_string, sizeof(time_now_string), "%Y-%m-%d %H:%M:%S", localtime(&time_now));
- signal(SIGALRM, sigalrm_handler);
- siginterrupt(SIGALRM, 0);
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) 2003, 2004, 2005 Optus Internet Engineering\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");
{
struct rlimit rlim;
}
}
+ initnetlink();
+
/* Set up the cluster communications port. */
if (cluster_init() < 0)
exit(1);
-#ifdef BGP
- signal(SIGPIPE, SIG_IGN);
- bgp_setup(config->as_number);
- bgp_add_route(config->bind_address, 0xffffffff);
- for (i = 0; i < BGP_NUM_PEERS; i++)
- {
- 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 */
- }
-#endif /* BGP */
-
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);
+ }
initudp();
initrad();
initippool();
- signal(SIGHUP, sighup_handler);
- signal(SIGTERM, sigterm_handler);
- signal(SIGINT, sigterm_handler);
- signal(SIGQUIT, sigquit_handler);
+ // seed prng
+ {
+ unsigned seed = time_now ^ getpid();
+ LOG(4, 0, 0, "Seeding the pseudo random generator: %u\n", seed);
+ srand(seed);
+ }
+
+ signal(SIGHUP, sighup_handler);
signal(SIGCHLD, sigchild_handler);
+ signal(SIGTERM, shutdown_handler);
+ signal(SIGINT, shutdown_handler);
+ signal(SIGQUIT, shutdown_handler);
// Prevent us from getting paged out
if (config->lock_pages)
LOG(0, 0, 0, "Can't lock pages: %s\n", strerror(errno));
}
- alarm(1);
-
- // Drop privileges here
- if (config->target_uid > 0 && geteuid() == 0)
- setuid(config->target_uid);
-
mainloop();
-#ifdef BGP
- /* try to shut BGP down cleanly; with luck the sockets will be
- writable since we're out of the select */
- for (i = 0; i < BGP_NUM_PEERS; i++)
- if (bgp_peers[i].state == Established)
- bgp_stop(&bgp_peers[i]);
-#endif /* BGP */
-
/* remove plugins (so cleanup code gets run) */
plugins_done();
static void sighup_handler(int sig)
{
- if (log_stream && log_stream != stderr)
- {
- fclose(log_stream);
- log_stream = NULL;
- }
-
- read_config_file();
-}
-
-static void sigalrm_handler(int sig)
-{
- // Log current traffic stats
-
- snprintf(config->bandwidth, sizeof(config->bandwidth),
- "UDP-ETH:%1.0f/%1.0f ETH-UDP:%1.0f/%1.0f TOTAL:%0.1f IN:%u OUT:%u",
- (udp_rx / 1024.0 / 1024.0 * 8),
- (eth_tx / 1024.0 / 1024.0 * 8),
- (eth_rx / 1024.0 / 1024.0 * 8),
- (udp_tx / 1024.0 / 1024.0 * 8),
- ((udp_tx + udp_rx + eth_tx + eth_rx) / 1024.0 / 1024.0 * 8),
- udp_rx_pkt, eth_rx_pkt);
-
- udp_tx = udp_rx = 0;
- udp_rx_pkt = eth_rx_pkt = 0;
- eth_tx = eth_rx = 0;
-
- if (config->dump_speed)
- printf("%s\n", config->bandwidth);
-
- // Update the internal time counter
- time(&time_now);
- strftime(time_now_string, sizeof(time_now_string), "%Y-%m-%d %H:%M:%S", localtime(&time_now));
- alarm(1);
-
- {
- // Run timer hooks
- struct param_timer p = { time_now };
- run_plugins(PLUGIN_TIMER, &p);
- }
-
-}
-
-static void sigterm_handler(int sig)
-{
- LOG(1, 0, 0, "Shutting down cleanly\n");
- main_quit++;
+ main_reload++;
}
-static void sigquit_handler(int sig)
+static void shutdown_handler(int sig)
{
- int i;
-
- LOG(1, 0, 0, "Shutting down without saving sessions\n");
-
- if (config->cluster_iam_master)
- {
- for (i = 1; i < MAXSESSION; i++)
- {
- if (session[i].opened)
- sessionkill(i, "L2TPNS Closing");
- }
- for (i = 1; i < MAXTUNNEL; i++)
- {
- if (tunnel[i].ip || tunnel[i].state)
- tunnelshutdown(i, "L2TPNS Closing");
- }
- }
-
- main_quit++;
+ main_quit = (sig == SIGQUIT) ? QUIT_SHUTDOWN : QUIT_FAILOVER;
}
static void sigchild_handler(int sig)
;
}
-static void build_chap_response(char *challenge, uint8_t id, uint16_t challenge_length, char **challenge_response)
+static void build_chap_response(uint8_t *challenge, uint8_t id, uint16_t challenge_length, uint8_t **challenge_response)
{
MD5_CTX ctx;
*challenge_response = NULL;
- if (!*config->l2tpsecret)
+ if (!*config->l2tp_secret)
{
LOG(0, 0, 0, "LNS requested CHAP authentication, but no l2tp secret is defined\n");
return;
LOG(4, 0, 0, " Building challenge response for CHAP request\n");
- *challenge_response = (char *)calloc(17, 1);
+ *challenge_response = calloc(17, 1);
- MD5Init(&ctx);
- MD5Update(&ctx, &id, 1);
- MD5Update(&ctx, config->l2tpsecret, strlen(config->l2tpsecret));
- MD5Update(&ctx, challenge, challenge_length);
- MD5Final(*challenge_response, &ctx);
+ MD5_Init(&ctx);
+ MD5_Update(&ctx, &id, 1);
+ MD5_Update(&ctx, config->l2tp_secret, strlen(config->l2tp_secret));
+ MD5_Update(&ctx, challenge, challenge_length);
+ MD5_Final(*challenge_response, &ctx);
return;
}
syslog_log = 0;
if (log_stream)
{
- fclose(log_stream);
+ if (log_stream != stderr)
+ fclose(log_stream);
+
log_stream = NULL;
}
setbuf(log_stream, NULL);
}
+#define L2TP_HDRS (20+8+6+4) // L2TP data encaptulation: ip + udp + l2tp (data) + ppp (inc hdlc)
+#define TCP_HDRS (20+20) // TCP encapsulation: ip + tcp
+
+ if (config->l2tp_mtu <= 0) config->l2tp_mtu = 1500; // ethernet default
+ else if (config->l2tp_mtu < MINMTU) config->l2tp_mtu = MINMTU;
+ else if (config->l2tp_mtu > MAXMTU) config->l2tp_mtu = MAXMTU;
+
+ // reset MRU/MSS globals
+ MRU = config->l2tp_mtu - L2TP_HDRS;
+ if (MRU > PPPoE_MRU)
+ MRU = PPPoE_MRU;
+
+ MSS = MRU - TCP_HDRS;
+
// Update radius
config->numradiusservers = 0;
for (i = 0; i < MAXRADSERVER; i++)
// test twice, In case someone works with
// a secondary radius server without defining
// a primary one, this will work even then.
- if (i>0 && !config->radiusport[i])
+ if (i > 0 && !config->radiusport[i])
config->radiusport[i] = config->radiusport[i-1];
if (!config->radiusport[i])
config->radiusport[i] = RADPORT;
if (!config->numradiusservers)
LOG(0, 0, 0, "No RADIUS servers defined!\n");
- config->num_radfds = 2 << RADIUS_SHIFT;
-
// parse radius_authtypes_s
config->radius_authtypes = config->radius_authprefer = 0;
p = config->radius_authtypes_s;
- while (*p)
+ while (p && *p)
{
char *s = strpbrk(p, " \t,");
int type = 0;
else if (!strncasecmp("pap", p, strlen(p)))
type = AUTHPAP;
else
- LOG(0, 0, 0, "Invalid RADIUS authentication type \"%s\"", p);
+ LOG(0, 0, 0, "Invalid RADIUS authentication type \"%s\"\n", p);
config->radius_authtypes |= type;
if (!config->radius_authprefer)
config->radius_authprefer = type;
+
+ p = s;
}
if (!config->radius_authtypes)
strcat(config->radius_authtypes_s, ", pap");
}
+ if (!config->radius_dae_port)
+ config->radius_dae_port = DAEPORT;
+
+#ifdef LAC
+ if(!config->bind_portremotelns)
+ config->bind_portremotelns = L2TPLACPORT;
+ if(!config->bind_address_remotelns)
+ config->bind_address_remotelns = INADDR_ANY;
+#endif
+ if(!config->iftun_address)
+ config->iftun_address = config->bind_address;
+
+ 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);
}
}
+ // Guest change
+ guest_accounts_num = 0;
+ char *p2 = config->guest_user;
+ while (p2 && *p2)
+ {
+ char *s = strpbrk(p2, " \t,");
+ if (s)
+ {
+ *s++ = 0;
+ while (*s == ' ' || *s == '\t')
+ s++;
+
+ if (!*s)
+ s = 0;
+ }
+
+ strcpy(guest_users[guest_accounts_num], p2);
+ LOG(1, 0, 0, "Guest account[%d]: %s\n", guest_accounts_num, guest_users[guest_accounts_num]);
+ guest_accounts_num++;
+ p2 = s;
+ }
+ // Rebuild the guest_user array
+ strcpy(config->guest_user, "");
+ int ui = 0;
+ for (ui=0; ui<guest_accounts_num; ui++)
+ {
+ strcat(config->guest_user, guest_users[ui]);
+ if (ui<guest_accounts_num-1)
+ {
+ strcat(config->guest_user, ",");
+ }
+ }
+
+
memcpy(config->old_plugins, config->plugins, sizeof(config->plugins));
- if (!config->cleanup_interval) config->cleanup_interval = 10;
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_interface)
LOG(0, 0, 0, "Can't write to PID file %s: %s\n", config->pid_file, strerror(errno));
}
}
-
- config->reload_config = 0;
}
static void read_config_file()
cli_do_file(f);
LOG(3, 0, 0, "Done reading config file\n");
fclose(f);
- update_config();
}
-int sessionsetup(tunnelidt t, sessionidt s)
+int sessionsetup(sessionidt s, tunnelidt t)
{
// A session now exists, set it up
in_addr_t ip;
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);
+ 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)
{
assign_ip_address(s);
if (!session[s].ip)
{
LOG(0, s, t, " No IP allocated. The IP address pool is FULL!\n");
- sessionshutdown(s, "No IP addresses available");
+ sessionshutdown(s, "No IP addresses available.", CDN_TRY_ANOTHER, TERM_SERVICE_UNAVAILABLE);
return 0;
}
LOG(3, s, t, " No IP allocated. Assigned %s from pool\n",
fmtaddr(htonl(session[s].ip), 0));
}
-
// Make sure this is right
session[s].tunnel = t;
for (i = 1; i <= config->cluster_highest_sessionid; i++)
{
if (i == s) continue;
- if (ip == session[i].ip) sessionkill(i, "Duplicate IP address");
- if (!session[s].walled_garden && !session[i].walled_garden && strcasecmp(user, session[i].user) == 0)
- sessionkill(i, "Duplicate session for users");
+ 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 (ip == session[i].ip)
+ {
+ sessionshutdown(i, "Duplicate IP address", CDN_ADMIN_DISC, TERM_ADMIN_RESET); // close radius/routes, etc.
+ continue;
+ }
+
+ if (config->allow_duplicate_users) continue;
+ 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;
+
+ // Drop the new session in case of duplicate sessionss, not the old one.
+ if (!strcasecmp(user, session[i].user))
+ 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
cache_ipmap(session[s].ip, s);
}
- if (!session[s].unique_id)
- {
- // did this session just finish radius?
- LOG(3, s, t, "Sending initial IPCP to client\n");
- sendipcp(t, s);
- session[s].unique_id = ++last_id;
- }
+ sess_local[s].lcp_authtype = 0; // RADIUS authentication complete
+ lcp_open(s, t); // transition to Network phase and send initial IPCP
// Run the plugin's against this new session.
{
if (session[s].throttle_in || session[s].throttle_out)
throttle_session(s, session[s].throttle_in, session[s].throttle_out);
- session[s].last_packet = time_now;
+ session[s].last_packet = session[s].last_data = time_now;
LOG(2, s, t, "Login by %s at %s from %s (%s)\n", session[s].user,
fmtaddr(htonl(session[s].ip), 0),
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
// 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
// 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
}
// check v6 routing
- if (new->flags & SF_IPV6_ROUTED && !(session[s].flags & SF_IPV6_ROUTED))
+ if (new->ipv6prefixlen && new->ppp.ipv6cp == Opened && session[s].ppp.ipv6cp != Opened)
route6set(s, new->ipv6route, new->ipv6prefixlen, 1);
// check filters
if (new->filter_in && (new->filter_in > MAXFILTER || !ip_filters[new->filter_in - 1].name[0]))
{
- LOG(2, s, session[s].tunnel, "Dropping invalid input filter %d\n", (int) new->filter_in);
+ LOG(2, s, session[s].tunnel, "Dropping invalid input filter %u\n", (int) new->filter_in);
new->filter_in = 0;
}
if (new->filter_out && (new->filter_out > MAXFILTER || !ip_filters[new->filter_out - 1].name[0]))
{
- LOG(2, s, session[s].tunnel, "Dropping invalid output filter %d\n", (int) new->filter_out);
+ LOG(2, s, session[s].tunnel, "Dropping invalid output filter %u\n", (int) new->filter_out);
new->filter_out = 0;
}
// for walking the sessions to forward byte counts to the master.
config->cluster_highest_sessionid = s;
- // TEMP: old session struct used a uint32_t to define the throttle
- // speed for both up/down, new uses a uint16_t for each. Deal with
- // sessions from an old master for migration.
- if (new->throttle_out == 0 && new->tbf_out)
- new->throttle_out = new->throttle_in;
-
memcpy(&session[s], new, sizeof(session[s])); // Copy over..
// Do fixups into address pool.
radiusnew,
radiussend,
getconfig,
+ sessionshutdown,
sessionkill,
throttle_session,
cluster_send_session,
run_plugin_done(p);
}
-static void processcontrol(uint8_t * buf, int len, struct sockaddr_in *addr, int alen)
+static void processcontrol(uint8_t *buf, int len, struct sockaddr_in *addr, int alen, struct in_addr *local)
{
struct nsctl request;
struct nsctl response;
r = pack_control(buf, NSCTL_MAX_PKT_SZ, response.type, response.argc, response.argv);
if (r > 0)
{
- sendto(controlfd, buf, r, 0, (const struct sockaddr *) addr, alen);
+ sendtofrom(controlfd, buf, r, 0, (const struct sockaddr *) addr, alen, local);
if (log_stream && config->debug >= 4)
{
LOG(4, 0, 0, "Sent [%s] ", fmtaddr(addr->sin_addr.s_addr, 0));
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 %d\n", i);
+ LOG(4, 0, i, "Assigning tunnel ID %u\n", i);
if (i > config->cluster_highest_tunnelid)
config->cluster_highest_tunnelid = i;
return i;
void become_master(void)
{
int s, i;
+ static struct event_data d[RADIUS_FDS];
+ struct epoll_event e;
+
run_plugins(PLUGIN_BECOME_MASTER, NULL);
// running a bunch of iptables commands is slow and can cause
}
// add radius fds
- for (i = 0; i < config->num_radfds; i++)
+ e.events = EPOLLIN;
+ for (i = 0; i < RADIUS_FDS; i++)
{
- FD_SET(radfds[i], &readset);
- if (radfds[i] > readset_n)
- readset_n = radfds[i];
+ d[i].type = FD_TYPE_RADIUS;
+ d[i].index = i;
+ e.data.ptr = &d[i];
+
+ epoll_ctl(epollfd, EPOLL_CTL_ADD, radfds[i], &e);
}
}
if (!session[s].opened)
continue;
- idle = time_now - session[s].last_packet;
+ idle = time_now - session[s].last_data;
idle /= 5 ; // In multiples of 5 seconds.
if (idle < 0)
idle = 0;
/* Unhide an avp.
*
- * This unencodes the AVP using the L2TP CHAP secret and the
- * previously stored random vector. It replaces the hidden data with
- * the cleartext data and returns the length of the cleartext data
- * (including the AVP "header" of 6 bytes).
- *
- * Based on code from rp-l2tpd by Roaring Penguin Software Inc.
+ * This unencodes the AVP using the L2TP secret and the previously
+ * stored random vector. It overwrites the hidden data with the
+ * unhidden AVP subformat.
*/
-static int unhide_avp(uint8_t *avp, tunnelidt t, sessionidt s, uint16_t length)
+static void unhide_value(uint8_t *value, size_t len, uint16_t type, uint8_t *vector, size_t vec_len)
{
MD5_CTX ctx;
- uint8_t *cursor;
uint8_t digest[16];
- uint8_t working_vector[16];
- uint16_t hidden_length;
- uint8_t type[2];
- size_t done, todo;
- uint8_t *output;
-
- // Find the AVP type.
- type[0] = *(avp + 4);
- type[1] = *(avp + 5);
-
- // Line up with the hidden data
- cursor = output = avp + 6;
+ uint8_t *last;
+ size_t d = 0;
+ uint16_t m = htons(type);
// Compute initial pad
- MD5Init(&ctx);
- MD5Update(&ctx, type, 2);
- MD5Update(&ctx, config->l2tpsecret, strlen(config->l2tpsecret));
- MD5Update(&ctx, session[s].random_vector, session[s].random_vector_length);
- MD5Final(digest, &ctx);
-
- // Get hidden length
- hidden_length = ((uint16_t) (digest[0] ^ cursor[0])) * 256 + (uint16_t) (digest[1] ^ cursor[1]);
+ MD5_Init(&ctx);
+ MD5_Update(&ctx, (unsigned char *) &m, 2);
+ MD5_Update(&ctx, config->l2tp_secret, strlen(config->l2tp_secret));
+ MD5_Update(&ctx, vector, vec_len);
+ MD5_Final(digest, &ctx);
- // Keep these for later use
- working_vector[0] = *cursor;
- working_vector[1] = *(cursor + 1);
- cursor += 2;
+ // pointer to last decoded 16 octets
+ last = value;
- if (hidden_length > length - 8)
+ while (len > 0)
{
- LOG(1, s, t, "Hidden length %d too long in AVP of length %d\n", (int) hidden_length, (int) length);
- return 0;
+ // calculate a new pad based on the last decoded block
+ if (d >= sizeof(digest))
+ {
+ MD5_Init(&ctx);
+ MD5_Update(&ctx, config->l2tp_secret, strlen(config->l2tp_secret));
+ MD5_Update(&ctx, last, sizeof(digest));
+ MD5_Final(digest, &ctx);
+
+ d = 0;
+ last = value;
+ }
+
+ *value++ ^= digest[d++];
+ len--;
}
+}
+
+int find_filter(char const *name, size_t len)
+{
+ int free = -1;
+ int i;
- /* Decrypt remainder */
- done = 2;
- todo = hidden_length;
- while (todo)
+ for (i = 0; i < MAXFILTER; i++)
{
- working_vector[done] = *cursor;
- *output = digest[done] ^ *cursor;
- ++output;
- ++cursor;
- --todo;
- ++done;
- if (done == 16 && todo)
+ if (!*ip_filters[i].name)
{
- // Compute new digest
- done = 0;
- MD5Init(&ctx);
- MD5Update(&ctx, config->l2tpsecret, strlen(config->l2tpsecret));
- MD5Update(&ctx, &working_vector, 16);
- MD5Final(digest, &ctx);
+ if (free < 0)
+ free = i;
+
+ continue;
}
- }
- return hidden_length + 6;
+ if (strlen(ip_filters[i].name) != len)
+ continue;
+
+ if (!strncmp(ip_filters[i].name, name, len))
+ return i;
+ }
+
+ return free;
}
static int ip_filter_port(ip_filter_portt *p, uint16_t port)
if (frag_offset)
{
- if (!rule->frag || rule->action == FILTER_ACTION_DENY)
+ // layer 4 deny rules are skipped
+ if (rule->action == FILTER_ACTION_DENY &&
+ (rule->src_ports.op || rule->dst_ports.op || rule->tcp_flag_op))
continue;
}
else
// default deny
return 0;
}
+
+#ifdef LAC
+
+tunnelidt lac_new_tunnel()
+{
+ return new_tunnel();
+}
+
+void lac_tunnelclear(tunnelidt t)
+{
+ tunnelclear(t);
+}
+
+void lac_send_SCCRQ(tunnelidt t, uint8_t * auth, unsigned int auth_len)
+{
+ uint16_t version = 0x0100; // protocol version
+
+ tunnel[t].state = TUNNELOPENING;
+
+ // Sent SCCRQ - Start Control Connection Request
+ controlt *c = controlnew(1); // sending SCCRQ
+ controls(c, 7, hostname, 1); // host name
+ controls(c, 8, Vendor_name, 1); // Vendor name
+ control16(c, 2, version, 1); // protocol version
+ control32(c, 3, 3, 1); // framing Capabilities
+ control16(c, 9, t, 1); // assigned tunnel
+ controlb(c, 11, (uint8_t *) auth, auth_len, 1); // CHAP Challenge
+ LOG(3, 0, t, "Sent SCCRQ to REMOTE LNS\n");
+ controladd(c, 0, t); // send
+}
+
+void lac_send_ICRQ(tunnelidt t, sessionidt s)
+{
+ // Sent ICRQ Incoming-call-request
+ controlt *c = controlnew(10); // ICRQ
+
+ control16(c, 14, s, 1); // assigned sesion
+ call_serial_number++;
+ control32(c, 15, call_serial_number, 1); // call serial number
+ LOG(3, s, t, "Sent ICRQ to REMOTE LNS (far ID %u)\n", tunnel[t].far);
+ controladd(c, 0, t); // send
+}
+
+void lac_tunnelshutdown(tunnelidt t, char *reason, int result, int error, char *msg)
+{
+ tunnelshutdown(t, reason, result, error, msg);
+}
+
+#endif
projects / l2tpns.git / blobdiff