// 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 1.104 2005/05/16 04:51:16 bodea Exp $";
+char const *cvs_id_l2tpns = "$Id: l2tpns.c,v 1.113 2005/06/28 14:48:20 bodea Exp $";
#include <arpa/inet.h>
#include <assert.h>
#ifdef BGP
#include "bgp.h"
-#endif /* BGP */
+#endif
// Globals
configt *config = NULL; // all configuration
int udpfd = -1; // UDP file handle
int controlfd = -1; // Control signal handle
int clifd = -1; // Socket listening for CLI connections.
+int daefd = -1; // Socket listening for DAE connections.
int snoopfd = -1; // UDP file handle for sending out intercept data
int *radfds = NULL; // RADIUS requests file handles
int ifrfd = -1; // File descriptor for routing, etc
int ifr6fd = -1; // File descriptor for IPv6 routing, etc
-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.
static int tunidx; // ifr_ifindex of tun device
static int syslog_log = 0; // are we logging to syslog
static FILE *log_stream = 0; // file handle for direct logging (i.e. direct into file, not via syslog).
-extern int cluster_sockfd; // Intra-cluster communications socket.
uint32_t last_id = 0; // Unique ID for radius accounting
struct cli_session_actions *cli_session_actions = NULL; // Pending session changes requested by CLI
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.
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.
+char main_quit = 0; // True if we're in the process of exiting.
linked_list *loaded_plugins;
linked_list *plugins[MAX_PLUGIN_TYPES];
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("allow_duplicate_users", allow_duplicate_users, BOOL),
CONFIG("bind_address", bind_address, IPv4),
CONFIG("peer_address", peer_address, IPv4),
CONFIG("send_garp", send_garp, BOOL),
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("cluster_interface", cluster_interface, STRING),
CONFIG("cluster_hb_interval", cluster_hb_interval, INT),
CONFIG("cluster_hb_timeout", cluster_hb_timeout, INT),
+ CONFIG("cluster_master_min_adv", cluster_master_min_adv, INT),
CONFIG("ipv6_prefix", ipv6_prefix, IPv6),
{ NULL, 0, 0, 0 },
};
"plugin_kill_session",
"plugin_control",
"plugin_radius_response",
+ "plugin_radius_reset",
"plugin_become_master",
"plugin_new_session_master",
};
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
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 update_config(void);
static tunnelidt new_tunnel(void);
static void unhide_value(uint8_t *value, size_t len, uint16_t type, uint8_t *vector, size_t vec_len);
-// return internal time (10ths since process startup)
-static clockt now(void)
+// on slaves, alow BGP to withdraw cleanly before exiting
+#define QUIT_DELAY 5
+
+// quit actions (master)
+#define QUIT_FAILOVER 1 // SIGTERM: exit when all control messages have been acked (for cluster failover)
+#define QUIT_SHUTDOWN 2 // SIGQUIT: shutdown sessions/tunnels, reject new connections
+
+// return internal time (10ths since process startup), set f if given
+static clockt now(double *f)
{
struct timeval t;
gettimeofday(&t, 0);
+ if (f) *f = t.tv_sec + t.tv_usec / 1000000.0;
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);
}
}
}
+// 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;
}
}
-// set up UDP port
+// set up UDP ports
static void initudp(void)
{
int on = 1;
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));
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));
+ if (bind(daefd, (void *) &addr, sizeof(addr)) < 0)
+ {
+ LOG(0, 0, 0, "Error in DAE bind: %s\n", strerror(errno));
+ exit(1);
+ }
+
+ // Intercept
+ snoopfd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
}
//
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;
}
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++;
}
// process outgoing (to tunnel) IPv6
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++;
}
//
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)
}
// 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.
// close session
for (s = 1; s <= config->cluster_highest_sessionid ; ++s)
if (session[s].tunnel == t)
- sessionshutdown(s, reason, 3, 0);
+ sessionshutdown(s, reason, 0, 0);
tunnel[t].state = TUNNELDIE;
tunnel[t].die = TIME + 700; // Clean up in 70 seconds
continue;
}
- LOG(4, s, t, "Hidden AVP\n");
-
// Unhide the AVP
unhide_value(b, n, mtype, session[s].random_vector, session[s].random_vector_length);
n = orig_len;
}
- LOG(4, s, t, " AVP %d (%s) len %d\n", mtype, avp_name(mtype), n);
+ LOG(4, s, t, " AVP %d (%s) len %d%s%s\n", mtype, avp_name(mtype), n,
+ flags & 0x40 ? ", hidden" : "", flags & 0x80 ? ", mandatory" : "");
+
switch (mtype)
{
case 0: // message type
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;
switch (message)
{
case 1: // SCCRQ - Start Control Connection Request
+ tunnel[t].state = TUNNELOPENING;
+ if (main_quit != QUIT_SHUTDOWN)
{
controlt *c = controlnew(2); // sending SCCRP
control16(c, 2, version, 1); // protocol version
control16(c, 9, t, 1); // assigned tunnel
controladd(c, t, 0); // send the resply
}
- tunnel[t].state = TUNNELOPENING;
+ else
+ {
+ tunnelshutdown(t, "Shutting down", 6, 0, 0);
+ }
break;
case 2: // SCCRP
tunnel[t].state = TUNNELOPEN;
// TBA
break;
case 10: // ICRQ
- if (sessionfree)
+ if (sessionfree && main_quit != QUIT_SHUTDOWN)
{
uint16_t r;
{
controlt *c = controlnew(14); // CDN
- control16(c, 1, 4, 1); // temporary lack of resources
- controladd(c, session[s].tunnel, asession); // send the message
+ if (main_quit == QUIT_SHUTDOWN)
+ control16(c, 1, 2, 7); // try another
+ else
+ control16(c, 1, 4, 0); // temporary lack of resources
+
+ controladd(c, t, asession); // send the message
}
return;
case 11: // ICRP
// 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;
- for (r = 1; r < MAXRADIUS; r++)
- {
- if (!radius[r].state)
- 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++)
+ 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 (i = 0; i < t_slice; i++)
{
+ t++;
+ if (t > config->cluster_highest_tunnelid)
+ t = 1;
+
// 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
tunnelsend(c->buf, c->length, t);
c = c->next;
}
+
+ t_actions++;
}
}
// Send hello
controlt *c = controlnew(6); // sending HELLO
controladd(c, t, 0); // send the message
LOG(3, 0, t, "Sending HELLO message\n");
+ t_actions++;
}
// Check for tunnel changes requested from the CLI
{
LOG(2, 0, t, "Dropping tunnel by CLI\n");
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].die <= TIME)
{
sessionkill(s, "Expired");
- if (++count >= MAX_ACTIONS) break;
+ s_actions++;
}
continue;
}
- if (session[s].ip && !(session[s].flags & SF_IPCP_ACKED))
+ if (session[s].ip && !(session[s].flags & SF_IPCP_ACKED)
+ && !(sess_local[s].radius && radius[sess_local[s].radius].state == RADIUSIPCP))
{
// 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);
+ s_actions++;
}
// Drop sessions who have not responded within IDLE_TIMEOUT seconds
{
sessionshutdown(s, "No response to LCP ECHO requests.", 3, 0);
STAT(session_timeout);
- if (++count >= MAX_ACTIONS) break;
+ s_actions++;
continue;
}
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;
+ s_actions++;
}
// Check for actions requested from the CLI
LOG(2, s, session[s].tunnel, "Dropping session by CLI\n");
sessionshutdown(s, "Requested by administrator.", 3, 0);
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)
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;
}
// RADIUS interim accounting
&& !sess_local[s].radius // RADIUS already in progress
&& time_now - sess_local[s].last_interim >= config->radius_interim)
{
- if (!(r = radiusnew(s)))
+ int rad = radiusnew(s);
+ if (!rad)
{
LOG(1, s, session[s].tunnel, "No free RADIUS sessions for Interim message\n");
STAT(radius_overflow);
LOG(3, s, session[s].tunnel, "Sending RADIUS Interim for %s (%u)\n",
session[s].user, session[s].unique_id);
- radiussend(r, RADIUSINTERIM);
+ radiussend(rad, RADIUSINTERIM);
sess_local[s].last_interim = time_now;
-
- if (++count >= MAX_ACTIONS)
- break;
- }
- }
-
- if (*config->accounting_dir)
- {
- if (next_acct <= TIME)
- {
- // 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);
+ 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;
+
+ if (!config->cluster_iam_master)
+ {
+#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;
+
+ // we don't want to become master
+ cluster_send_ping(0);
+
+ return 1;
+ }
+
+ if (time_now < (stopped_bgp + QUIT_DELAY))
+ return 1;
+ }
+#endif /* BGP */
+
+ 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;
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
+
+// the base set of fds polled: cli, cluster, tun, udp, control, dae
+#define BASE_FDS 6
+
+// 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;
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)
+ {
+ LOG(0, 0, 0, "epoll_create failed: %s\n", strerror(errno));
+ exit(1);
+ }
+
+ LOG(4, 0, 0, "Beginning of main loop. clifd=%d, cluster_sockfd=%d, tunfd=%d, udpfd=%d, controlfd=%d, daefd=%d\n",
+ clifd, cluster_sockfd, tunfd, udpfd, controlfd, daefd);
+
+ /* setup our fds to poll for input */
{
- fd_set r;
- int n = readset_n;
+ static struct event_data d[BASE_FDS];
+ struct epoll_event e;
+
+ e.events = EPOLLIN;
+ i = 0;
+
+ d[i].type = FD_TYPE_CLI;
+ e.data.ptr = &d[i++];
+ epoll_ctl(epollfd, EPOLL_CTL_ADD, clifd, &e);
+
+ 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);
+ }
+
#ifdef BGP
- fd_set w;
- int bgp_set[BGP_NUM_PEERS];
+ 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, 0); /* 0 = routing disabled */
+ }
#endif /* BGP */
+ while (!main_quit || still_busy())
+ {
+ int more = 0;
+ int n;
+
if (config->reload_config)
{
// Update the config state based on config settings
update_config();
}
- memcpy(&r, &readset, sizeof(fd_set));
- to.tv_sec = 0;
- to.tv_usec = 100000; // 1/10th of a second.
-
#ifdef BGP
- FD_ZERO(&w);
- for (i = 0; i < BGP_NUM_PEERS; i++)
- {
- 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;
- }
-
- if (bgp_set[i] & 2)
- {
- FD_SET(bgp_peers[i].sock, &w);
- if (bgp_peers[i].sock > n)
- n = bgp_peers[i].sock;
- }
- }
-
- n = select(n + 1, &r, &w, 0, &to);
-#else /* BGP */
- n = select(n + 1, &r, 0, 0, &to);
+ 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 ||
continue;
LOG(0, 0, 0, "Error returned from select(): %s\n", strerror(errno));
- main_quit++;
- break;
+ break; // exit
}
- else if (n)
+
+ if (n)
{
struct sockaddr_in addr;
int alen, c, s;
+ int udp_ready = 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 */
- // 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--;
- }
-
- // RADIUS responses
- if (config->cluster_iam_master)
+ for (c = n, i = 0; i < c; i++)
{
- for (i = 0; i < config->num_radfds; i++)
+ struct event_data *d = events[i].data.ptr;
+ switch (d->type)
{
- if (FD_ISSET(radfds[i], &r))
+ case FD_TYPE_CLI: // CLI connections
+ {
+ int cli;
+
+ alen = sizeof(addr);
+ if ((cli = accept(clifd, (struct sockaddr *)&addr, &alen)) >= 0)
{
- processrad(buf, recv(radfds[i], buf, sizeof(buf), 0), i);
- n--;
+ cli_do(cli);
+ close(cli);
}
- }
- }
+ else
+ LOG(0, 0, 0, "accept error: %s\n", strerror(errno));
- // 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);
+ n--;
+ break;
}
- else
- LOG(0, 0, 0, "accept error: %s\n", strerror(errno));
- n--;
- }
+ // these are handled below, with multiple interleaved reads
+ case FD_TYPE_CLUSTER: cluster_ready++; break;
+ case FD_TYPE_TUN: tun_ready++; break;
+ case FD_TYPE_UDP: udp_ready++; break;
+
+ case FD_TYPE_CONTROL: // nsctl commands
+ alen = sizeof(addr);
+ processcontrol(buf, recvfrom(controlfd, buf, sizeof(buf), MSG_WAITALL, (void *) &addr, &alen), &addr, alen);
+ n--;
+ break;
+
+ case FD_TYPE_DAE: // DAE requests
+ alen = sizeof(addr);
+ processdae(buf, recvfrom(daefd, buf, sizeof(buf), MSG_WAITALL, (void *) &addr, &alen), &addr, alen);
+ n--;
+ break;
+
+ case FD_TYPE_RADIUS: // RADIUS response
+ s = recv(radfds[d->index], buf, sizeof(buf), 0);
+ if (s >= 0 && config->cluster_iam_master)
+ processrad(buf, s, d->index);
+
+ n--;
+ break;
#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--;
+ case FD_TYPE_BGP:
+ bgp_events[d->index] = events[i].events;
+ n--;
+ break;
+#endif /* BGP */
+
+ default:
+ LOG(0, 0, 0, "Unexpected fd type returned from epoll_wait: %d\n", d->type);
+ }
}
+
+#ifdef BGP
+ 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)
}
else
{
- FD_CLR(udpfd, &r);
+ udp_ready = 0;
n--;
}
}
// incoming IP
- if (FD_ISSET(tunfd, &r))
+ if (tun_ready)
{
if ((s = read(tunfd, buf, sizeof(buf))) > 0)
{
}
else
{
- FD_CLR(tunfd, &r);
+ tun_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)
}
else
{
- FD_CLR(cluster_sockfd, &r);
+ cluster_ready = 0;
n--;
}
}
config->multi_read_count, udp_pkts, tun_pkts, cluster_pkts);
STAT(multi_read_exceeded);
+ more++;
}
}
// 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)
config->debug = optdebug;
config->num_tbfs = MAXTBFS;
config->rl_rate = 28; // 28kbps
+ config->cluster_master_min_adv = 1;
strcpy(config->random_device, RANDOMDEVICE);
log_stream = stderr;
static int dump_session(FILE **f, sessiont *s)
{
- if (!s->opened || !s->ip || !(s->cin || s->cout) || !*s->user || s->walled_garden)
+ if (!s->opened || !s->ip || !(s->cin_delta || s->cout_delta) || !*s->user || s->walled_garden)
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->bind_address ? config->bind_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;
}
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);
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)
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 sigterm_handler(int sig)
+static void shutdown_handler(int sig)
{
- LOG(1, 0, 0, "Shutting down cleanly\n");
- main_quit++;
-}
-
-static void sigquit_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", 6, 0, 0);
- }
- }
-
- main_quit++;
+ LOG(1, 0, 0, "Shutting down\n");
+ main_quit = (sig == SIGQUIT) ? QUIT_SHUTDOWN : QUIT_FAILOVER;
}
static void sigchild_handler(int sig)
if (!config->numradiusservers)
LOG(0, 0, 0, "No RADIUS servers defined!\n");
- config->num_radfds = 1 << RADIUS_SHIFT;
-
// parse radius_authtypes_s
config->radius_authtypes = config->radius_authprefer = 0;
p = config->radius_authtypes_s;
strcat(config->radius_authtypes_s, ", pap");
}
+ if (!config->radius_dae_port)
+ config->radius_dae_port = DAEPORT;
+
// re-initialise the random number source
initrandom(config->random_device);
}
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)
if (!session[s].ip)
{
LOG(0, s, t, " No IP allocated. The IP address pool is FULL!\n");
- sessionshutdown(s, "No IP addresses available.", 2, 7);
+ sessionshutdown(s, "No IP addresses available.", 2, 7); // try another
return 0;
}
LOG(3, s, t, " No IP allocated. Assigned %s from pool\n",
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)
+ if (!session[s].opened) continue;
+ if (ip == session[i].ip)
+ {
+ sessionkill(i, "Duplicate IP address");
+ continue;
+ }
+
+ if (config->allow_duplicate_users) continue;
+ if (session[s].walled_garden || session[i].walled_garden) continue;
+ if (!strcasecmp(user, session[i].user))
sessionkill(i, "Duplicate session for users");
}
}
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);
}
}
uint8_t digest[16];
uint8_t *last;
size_t d = 0;
+ uint16_t m = htons(type);
// Compute initial pad
MD5Init(&ctx);
- MD5Update(&ctx, (uint8_t) (type >> 8) & 0xff, 1);
- MD5Update(&ctx, (uint8_t) type & 0xff, 1);
+ MD5Update(&ctx, (unsigned char *) &m, 2);
MD5Update(&ctx, config->l2tpsecret, strlen(config->l2tpsecret));
MD5Update(&ctx, vector, vec_len);
MD5Final(digest, &ctx);
}
}
+int find_filter(char const *name, size_t len)
+{
+ int free = -1;
+ int i;
+
+ for (i = 0; i < MAXFILTER; i++)
+ {
+ if (!*ip_filters[i].name)
+ {
+ if (free < 0)
+ free = i;
+
+ continue;
+ }
+
+ 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)
{
switch (p->op)
projects / l2tpns.git / blobdiff