/*
net.c -- most of the network code
- Copyright (C) 1998,99 Ivo Timmermans <zarq@iname.com>
+ Copyright (C) 1998,1999,2000 Ivo Timmermans <itimmermans@bigfoot.com>,
+ 2000 Guus Sliepen <guus@sliepen.warande.net>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+ $Id: net.c,v 1.35.4.11 2000/06/27 21:05:07 guus Exp $
*/
#include "config.h"
#include "netutl.h"
#include "protocol.h"
+#include "system.h"
+
int tap_fd = -1;
int total_tap_in = 0;
int total_socket_in = 0;
int total_socket_out = 0;
-time_t last_ping_time = 0;
+int upstreamindex = 0;
+static int seconds_till_retry;
/* The global list of existing connections */
conn_list_t *conn_list = NULL;
real_packet_t rp;
cp
do_encrypt((vpn_packet_t*)packet, &rp, cl->key);
- rp.from = myself->vpn_ip;
+ rp.from = htonl(myself->vpn_ip);
+ rp.data.len = htons(rp.data.len);
+ rp.len = htons(rp.len);
if(debug_lvl > 3)
- syslog(LOG_ERR, "Sent %d bytes to %lx", rp.len, cl->vpn_ip);
+ syslog(LOG_ERR, _("Sending packet of %d bytes to " IP_ADDR_S " (%s)"),
+ ntohs(rp.len), IP_ADDR_V(cl->vpn_ip), cl->hostname);
- if((r = send(cl->socket, (char*)&rp, rp.len, 0)) < 0)
+ if((r = send(cl->socket, (char*)&rp, ntohs(rp.len), 0)) < 0)
{
- syslog(LOG_ERR, "Error sending data: %m");
+ syslog(LOG_ERR, _("Error sending packet to " IP_ADDR_S " (%s): %m"),
+ IP_ADDR_V(cl->vpn_ip), cl->hostname);
return -1;
}
total_socket_out += r;
-cp
- return 0;
-}
-/*
- write as many bytes as possible to the tap
- device, possibly in multiple turns.
-*/
-int write_n(int fd, void *buf, size_t len)
-{
- int r, done = 0;
-cp
- do
- {
- if((r = write(fd, buf, len)) < 0)
- return -1;
- len -= r;
- buf += r;
- done += r;
- } while(len > 0);
-
- return done;
+ cl->want_ping = 1;
cp
+ return 0;
}
int xrecv(conn_list_t *cl, void *packet)
do_decrypt((real_packet_t*)packet, &vp, cl->key);
add_mac_addresses(&vp);
- if((lenin = write_n(tap_fd, &vp, vp.len + 2)) < 0)
- syslog(LOG_ERR, "Can't write to tap device: %m");
+ if(debug_lvl > 3)
+ syslog(LOG_ERR, _("Receiving packet of %d bytes from " IP_ADDR_S " (%s)"),
+ ((real_packet_t*)packet)->len, IP_ADDR_V(cl->vpn_ip), cl->hostname);
+
+ if((lenin = write(tap_fd, &vp, vp.len + sizeof(vp.len))) < 0)
+ syslog(LOG_ERR, _("Can't write to tap device: %m"));
else
total_tap_out += lenin;
+
+ cl->want_ping = 0;
+ cl->last_ping_time = time(NULL);
cp
return 0;
}
{
queue_element_t *e;
cp
- if(debug_lvl > 3)
- syslog(LOG_DEBUG, "packet to queue: %d", s);
-
- e = xmalloc(sizeof(queue_element_t));
+ e = xmalloc(sizeof(*e));
e->packet = xmalloc(s);
memcpy(e->packet, packet, s);
if(!*q)
{
- *q = xmalloc(sizeof(packet_queue_t));
+ *q = xmalloc(sizeof(**q));
(*q)->head = (*q)->tail = NULL;
}
}
/* Remove a queue element */
-void del_queue(packet_queue_t **q, packet_element_t *e)
+void del_queue(packet_queue_t **q, queue_element_t *e)
{
- queue_element_t *p, *n;
cp
free(e->packet);
void flush_queue(conn_list_t *cl, packet_queue_t **pq,
int (*function)(conn_list_t*,void*))
{
- queue_element_t *p, *prev = NULL, *next = NULL;
+ queue_element_t *p, *next = NULL;
cp
for(p = (*pq)->head; p != NULL; )
{
}
if(debug_lvl > 3)
- syslog(LOG_DEBUG, "queue flushed");
+ syslog(LOG_DEBUG, _("Queue flushed"));
cp
}
cp
if(cl->sq)
{
- if(debug_lvl > 1)
- syslog(LOG_DEBUG, "Flushing send queue for " IP_ADDR_S,
+ if(debug_lvl > 3)
+ syslog(LOG_DEBUG, _("Flushing send queue for " IP_ADDR_S),
IP_ADDR_V(cl->vpn_ip));
flush_queue(cl, &(cl->sq), xsend);
}
if(cl->rq)
{
- if(debug_lvl > 1)
- syslog(LOG_DEBUG, "Flushing receive queue for " IP_ADDR_S,
+ if(debug_lvl > 3)
+ syslog(LOG_DEBUG, _("Flushing receive queue for " IP_ADDR_S),
IP_ADDR_V(cl->vpn_ip));
flush_queue(cl, &(cl->rq), xrecv);
}
cp
if((cl = lookup_conn(to)) == NULL)
{
- if(debug_lvl > 2)
+ if(debug_lvl > 3)
{
- syslog(LOG_NOTICE, "trying to look up " IP_ADDR_S " in connection list failed.",
+ syslog(LOG_NOTICE, _("Trying to look up " IP_ADDR_S " in connection list failed!"),
IP_ADDR_V(to));
}
+
+ /* Is this really necessary? If we can't find "to", then neither should any uplink. (GS) */
+
+ return -1;
+
+ for(cl = conn_list; cl != NULL && !cl->status.outgoing; cl = cl->next);
+ if(!cl)
+ { /* No open outgoing connection has been found. */
+ if(debug_lvl > 3)
+ syslog(LOG_NOTICE, _("There is no remote host I can send this packet to!"));
+ return -1;
+ }
+ }
+
+ /* If we ourselves have indirectdata flag set, we should send only to our uplink! */
+
+ if(myself->flags & EXPORTINDIRECTDATA)
+ {
for(cl = conn_list; cl != NULL && !cl->status.outgoing; cl = cl->next);
if(!cl)
{ /* No open outgoing connection has been found. */
- if(debug_lvl > 2)
- syslog(LOG_NOTICE, "There is no remote host I can send this packet to.");
+ if(debug_lvl > 3)
+ syslog(LOG_NOTICE, _("There is no remote host I can send this packet to!"));
return -1;
}
}
+ else
+
+ /* If indirectdata flag is set for the destination we just looked up,
+ * then real_ip is actually the vpn_ip of the gateway tincd
+ * it is behind.
+ */
+
+ if(cl->flags & INDIRECTDATA)
+ {
+ if(debug_lvl > 3)
+ syslog(LOG_NOTICE, _("Indirect packet to " IP_ADDR_S " via " IP_ADDR_S),
+ IP_ADDR_V(cl->vpn_ip), IP_ADDR_V(cl->real_ip));
+ if((cl = lookup_conn(cl->real_ip)) == NULL)
+ {
+ if(debug_lvl > 3)
+ syslog(LOG_NOTICE, _("Indirect look up " IP_ADDR_S " in connection list failed!"),
+ IP_ADDR_V(to));
+
+ /* Gateway tincd dead? Should we kill it? (GS) */
+
+ return -1;
+ }
+ if(cl->flags & INDIRECTDATA) /* This should not happen */
+ {
+ if(debug_lvl > 3)
+ syslog(LOG_NOTICE, _("Double indirection for " IP_ADDR_S),
+ IP_ADDR_V(to));
+ return -1;
+ }
+ }
if(my_key_expiry <= time(NULL))
regenerate_keys();
if(!cl->status.dataopen)
if(setup_vpn_connection(cl) < 0)
- return -1;
-
+ {
+ syslog(LOG_ERR, _("Could not open UDP connection to " IP_ADDR_S " (%s)"), IP_ADDR_V(cl->vpn_ip), cl->hostname);
+ return -1;
+ }
+
if(!cl->status.validkey)
{
+ if(debug_lvl > 3)
+ syslog(LOG_INFO, _(IP_ADDR_S " (%s) has no valid key, queueing packet"), IP_ADDR_V(cl->vpn_ip), cl->hostname);
add_queue(&(cl->sq), packet, packet->len + 2);
if(!cl->status.waitingforkey)
- send_key_request(to);
+ send_key_request(cl->vpn_ip); /* Keys should be sent to the host running the tincd */
return 0;
}
if(!cl->status.active)
{
+ if(debug_lvl > 3)
+ syslog(LOG_INFO, _(IP_ADDR_S " (%s) is not ready, queueing packet"), IP_ADDR_V(cl->vpn_ip), cl->hostname);
add_queue(&(cl->sq), packet, packet->len + 2);
- if(debug_lvl > 1)
- syslog(LOG_INFO, IP_ADDR_S " is not ready, queueing packet.", IP_ADDR_V(cl->vpn_ip));
return 0; /* We don't want to mess up, do we? */
}
return xsend(cl, packet);
}
-int send_broadcast(conn_list_t *cl, vpn_packet_t *packet)
-{
- conn_list_t *p;
-cp
- for(p = cl; p != NULL; p = p->next)
- if(send_packet(p->real_ip, packet) < 0)
- {
- syslog(LOG_ERR, "Could not send a broadcast packet to %08lx (%08lx): %m",
- p->vpn_ip, p->real_ip);
- break; /* FIXME: should retry later, and send a ping over the metaconnection. */
- }
-cp
- return 0;
-}
-
/*
open the local ethertap device
*/
if((nfd = open(tapfname, O_RDWR | O_NONBLOCK)) < 0)
{
- syslog(LOG_ERR, "Could not open %s: %m", tapfname);
+ syslog(LOG_ERR, _("Could not open %s: %m"), tapfname);
return -1;
}
cp
if((nfd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) < 0)
{
- syslog(LOG_ERR, "Creating metasocket failed: %m");
+ syslog(LOG_ERR, _("Creating metasocket failed: %m"));
return -1;
}
if(setsockopt(nfd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one)))
{
- syslog(LOG_ERR, "setsockopt: %m");
+ syslog(LOG_ERR, _("setsockopt: %m"));
return -1;
}
flags = fcntl(nfd, F_GETFL);
if(fcntl(nfd, F_SETFL, flags | O_NONBLOCK) < 0)
{
- syslog(LOG_ERR, "fcntl: %m");
+ syslog(LOG_ERR, _("fcntl: %m"));
return -1;
}
if(bind(nfd, (struct sockaddr *)&a, sizeof(struct sockaddr)))
{
- syslog(LOG_ERR, "Can't bind to port %hd/tcp: %m", port);
+ syslog(LOG_ERR, _("Can't bind to port %hd/tcp: %m"), port);
return -1;
}
if(listen(nfd, 3))
{
- syslog(LOG_ERR, "listen: %m");
+ syslog(LOG_ERR, _("listen: %m"));
return -1;
}
cp
cp
if((nfd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0)
{
- syslog(LOG_ERR, "Creating socket failed: %m");
+ syslog(LOG_ERR, _("Creating socket failed: %m"));
return -1;
}
if(setsockopt(nfd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one)))
{
- syslog(LOG_ERR, "setsockopt: %m");
+ syslog(LOG_ERR, _("setsockopt: %m"));
return -1;
}
flags = fcntl(nfd, F_GETFL);
if(fcntl(nfd, F_SETFL, flags | O_NONBLOCK) < 0)
{
- syslog(LOG_ERR, "fcntl: %m");
+ syslog(LOG_ERR, _("fcntl: %m"));
return -1;
}
if(bind(nfd, (struct sockaddr *)&a, sizeof(struct sockaddr)))
{
- syslog(LOG_ERR, "Can't bind to port %hd/udp: %m", port);
+ syslog(LOG_ERR, _("Can't bind to port %hd/udp: %m"), port);
return -1;
}
cp
struct sockaddr_in a;
config_t const *cfg;
cp
+ if(debug_lvl > 0)
+ syslog(LOG_INFO, _("Trying to connect to %s"), cl->hostname);
+
if((cfg = get_config_val(upstreamport)) == NULL)
cl->port = 655;
else
cl->meta_socket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if(cl->meta_socket == -1)
{
- syslog(LOG_ERR, "Creating socket failed: %m");
+ syslog(LOG_ERR, _("Creating socket failed: %m"));
return -1;
}
if(connect(cl->meta_socket, (struct sockaddr *)&a, sizeof(a)) == -1)
{
- syslog(LOG_ERR, IP_ADDR_S ":%d: %m", IP_ADDR_V(cl->real_ip), cl->port);
+ syslog(LOG_ERR, _(IP_ADDR_S ":%d: %m"), IP_ADDR_V(cl->real_ip), cl->port);
return -1;
}
flags = fcntl(cl->meta_socket, F_GETFL);
if(fcntl(cl->meta_socket, F_SETFL, flags | O_NONBLOCK) < 0)
{
- syslog(LOG_ERR, "fcntl: %m");
+ syslog(LOG_ERR, _("fcntl: %m"));
return -1;
}
- cl->hostname = hostlookup(htonl(cl->real_ip));
-
- syslog(LOG_INFO, "Connected to %s:%hd" , cl->hostname, cl->port);
+ syslog(LOG_INFO, _("Connected to " IP_ADDR_S ":%hd"),
+ IP_ADDR_V(cl->real_ip), cl->port);
cp
return 0;
}
cp
ncn = new_conn_list();
ncn->real_ip = ip;
-
+ ncn->hostname = hostlookup(htonl(ip));
+
if(setup_outgoing_meta_socket(ncn) < 0)
{
- syslog(LOG_ERR, "Could not set up a meta connection.");
+ syslog(LOG_ERR, _("Could not set up a meta connection to %s"),
+ ncn->hostname);
free_conn_element(ncn);
return -1;
}
if(!(cfg = get_config_val(myvpnip)))
{
- syslog(LOG_ERR, "No value for my VPN IP given");
+ syslog(LOG_ERR, _("No value for my VPN IP given"));
return -1;
}
myself->vpn_ip = cfg->data.ip->ip;
+ myself->hostname = hostlookup(htonl(myself->vpn_ip));
myself->vpn_mask = cfg->data.ip->mask;
+ myself->flags = 0;
if(!(cfg = get_config_val(listenport)))
myself->port = 655;
else
myself->port = cfg->data.val;
+ if(cfg = get_config_val(indirectdata))
+ if(cfg->data.val == stupid_true)
+ myself->flags |= EXPORTINDIRECTDATA;
+
if((myself->meta_socket = setup_listen_meta_socket(myself->port)) < 0)
{
- syslog(LOG_ERR, "Unable to set up a listening socket");
+ syslog(LOG_ERR, _("Unable to set up a listening socket"));
return -1;
}
if((myself->socket = setup_vpn_in_socket(myself->port)) < 0)
{
- syslog(LOG_ERR, "Unable to set up an incoming vpn data socket");
+ syslog(LOG_ERR, _("Unable to set up an incoming vpn data socket"));
close(myself->meta_socket);
return -1;
}
myself->status.active = 1;
- syslog(LOG_NOTICE, "Ready: listening on port %d.", myself->port);
+ syslog(LOG_NOTICE, _("Ready: listening on port %d"), myself->port);
cp
return 0;
}
+RETSIGTYPE
+sigalrm_handler(int a)
+{
+ config_t const *cfg;
+cp
+ cfg = get_next_config_val(upstreamip, upstreamindex++);
+
+ while(cfg)
+ {
+ if(!setup_outgoing_connection(cfg->data.ip->ip)) /* function returns 0 when there are no problems */
+ {
+ signal(SIGALRM, SIG_IGN);
+ return;
+ }
+ cfg = get_next_config_val(upstreamip, upstreamindex++); /* Or else we try the next ConnectTo line */
+ }
+
+ signal(SIGALRM, sigalrm_handler);
+ upstreamindex = 0;
+ seconds_till_retry += 5;
+ if(seconds_till_retry>300) /* Don't wait more than 5 minutes. */
+ seconds_till_retry = 300;
+ alarm(seconds_till_retry);
+ syslog(LOG_ERR, _("Still failed to connect to other, will retry in %d seconds"),
+ seconds_till_retry);
+cp
+}
+
/*
setup all initial network connections
*/
config_t const *cfg;
cp
if((cfg = get_config_val(pingtimeout)) == NULL)
- timeout = 10;
+ timeout = 5;
else
timeout = cfg->data.val;
if(setup_myself() < 0)
return -1;
- if((cfg = get_config_val(upstreamip)) == NULL)
+ if((cfg = get_next_config_val(upstreamip, upstreamindex++)) == NULL)
/* No upstream IP given, we're listen only. */
return 0;
- if(setup_outgoing_connection(cfg->data.ip->ip))
- return -1;
-cp
- return 0;
-}
-
-RETSIGTYPE
-sigalrm_handler(int a)
-{
- config_t const *cfg;
- static int seconds_till_retry;
-cp
- cfg = get_config_val(upstreamip);
-
- if(!setup_outgoing_connection(cfg->data.ip->ip))
+ while(cfg)
{
- signal(SIGALRM, SIG_IGN);
- seconds_till_retry = 5;
- }
- else
- {
- signal(SIGALRM, sigalrm_handler);
- seconds_till_retry += 5;
- alarm(seconds_till_retry);
- syslog(LOG_ERR, "Still failed to connect to other. Will retry in %d seconds.",
- seconds_till_retry);
+ if(!setup_outgoing_connection(cfg->data.ip->ip)) /* function returns 0 when there are no problems */
+ return 0;
+ cfg = get_next_config_val(upstreamip, upstreamindex++); /* Or else we try the next ConnectTo line */
}
+
+ signal(SIGALRM, sigalrm_handler);
+ upstreamindex = 0;
+ seconds_till_retry = 300;
+ alarm(seconds_till_retry);
+ syslog(LOG_NOTICE, _("Trying to re-establish outgoing connection in 5 minutes"));
cp
+ return 0;
}
/*
close(tap_fd);
destroy_conn_list();
- syslog(LOG_NOTICE, "Terminating.");
+ syslog(LOG_NOTICE, _("Terminating"));
cp
return;
}
int nfd, flags;
struct sockaddr_in a;
cp
- if(debug_lvl > 1)
- syslog(LOG_DEBUG, "Opening UDP socket to " IP_ADDR_S, IP_ADDR_V(cl->real_ip));
+ if(debug_lvl > 0)
+ syslog(LOG_DEBUG, _("Opening UDP socket to %s"), cl->hostname);
nfd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
if(nfd == -1)
{
- syslog(LOG_ERR, "Creating data socket failed: %m");
+ syslog(LOG_ERR, _("Creating UDP socket failed: %m"));
return -1;
}
if(connect(nfd, (struct sockaddr *)&a, sizeof(a)) == -1)
{
- syslog(LOG_ERR, "Create connection to %08lx:%d failed: %m", ntohs(cl->real_ip),
- cl->port);
+ syslog(LOG_ERR, _("Connecting to %s port %d failed: %m"),
+ cl->hostname, cl->port);
return -1;
}
flags = fcntl(nfd, F_GETFL);
if(fcntl(nfd, F_SETFL, flags | O_NONBLOCK) < 0)
{
- syslog(LOG_ERR, "This is a bug: %s:%d: %d:%m", __FILE__, __LINE__, nfd);
+ syslog(LOG_ERR, _("This is a bug: %s:%d: %d:%m"), __FILE__, __LINE__, nfd);
return -1;
}
if(getpeername(sfd, &ci, &len) < 0)
{
- syslog(LOG_ERR, "Error: getpeername: %m");
+ syslog(LOG_ERR, _("Error: getpeername: %m"));
return NULL;
}
- p->hostname = hostlookup(ci.sin_addr.s_addr);
p->real_ip = ntohl(ci.sin_addr.s_addr);
+ p->hostname = hostlookup(ci.sin_addr.s_addr);
p->meta_socket = sfd;
p->status.meta = 1;
-
- syslog(LOG_NOTICE, "Connection from %s:%d", p->hostname, htons(ci.sin_port));
+ p->buflen = 0;
+ p->last_ping_time = time(NULL);
+ p->want_ping = 0;
+
+ if(debug_lvl > 0)
+ syslog(LOG_NOTICE, _("Connection from %s port %d"),
+ p->hostname, htons(ci.sin_port));
if(send_basic_info(p) < 0)
{
cp
if(getsockopt(cl->socket, SOL_SOCKET, SO_ERROR, &x, &l) < 0)
{
- syslog(LOG_ERR, "This is a bug: %s:%d: %d:%m", __FILE__, __LINE__, cl->socket);
+ syslog(LOG_ERR, _("This is a bug: %s:%d: %d:%m"), __FILE__, __LINE__, cl->socket);
return -1;
}
if(x)
{
- syslog(LOG_ERR, "Incoming data socket error: %s", sys_errlist[x]);
+ syslog(LOG_ERR, _("Incoming data socket error: %s"), sys_errlist[x]);
return -1;
}
lenin = recvfrom(cl->socket, &rp, MTU, 0, NULL, NULL);
if(lenin <= 0)
{
- syslog(LOG_ERR, "Receiving data failed: %m");
+ syslog(LOG_ERR, _("Receiving packet from %s failed: %m"), cl->hostname);
return -1;
}
total_socket_in += lenin;
+
+ rp.data.len = ntohs(rp.data.len);
+ rp.len = ntohs(rp.len);
+ rp.from = ntohl(rp.from);
+
if(rp.len >= 0)
{
f = lookup_conn(rp.from);
- if(debug_lvl > 2)
- syslog(LOG_DEBUG, "packet from " IP_ADDR_S " (len %d)",
- IP_ADDR_V(rp.from), rp.len);
if(!f)
{
- syslog(LOG_ERR, "Got packet from unknown source " IP_ADDR_S,
- IP_ADDR_V(rp.from));
+ syslog(LOG_ERR, _("Got packet from " IP_ADDR_S " (%s) with unknown origin " IP_ADDR_S "?"),
+ IP_ADDR_V(cl->vpn_ip), cl->hostname, IP_ADDR_V(rp.from));
return -1;
}
*/
void terminate_connection(conn_list_t *cl)
{
+ conn_list_t *p, *q;
+
cp
if(cl->status.remove)
return;
if(debug_lvl > 0)
- syslog(LOG_NOTICE, "Closing connection with %s.", cl->hostname);
+ syslog(LOG_NOTICE, _("Closing connection with " IP_ADDR_S " (%s)"),
+ IP_ADDR_V(cl->vpn_ip), cl->hostname);
if(cl->status.timeout)
send_timeout(cl);
if(cl->status.outgoing)
{
- alarm(5);
signal(SIGALRM, sigalrm_handler);
- syslog(LOG_NOTICE, "Try to re-establish outgoing connection in 5 seconds.");
+ seconds_till_retry = 5;
+ alarm(seconds_till_retry);
+ syslog(LOG_NOTICE, _("Trying to re-establish outgoing connection in 5 seconds"));
}
cl->status.remove = 1;
-cp
-}
-/*
- send out a ping request to all active
- connections
-*/
-int send_broadcast_ping(void)
-{
- conn_list_t *p;
+ /* If this cl isn't active, don't send any DEL_HOSTs and don't bother
+ checking for other lost connections. */
+ if(!cl->status.active)
+ return;
+
+ cl->status.active = 0;
+
cp
+ /* Find all connections that were lost because they were behind cl
+ (the connection that was dropped). */
for(p = conn_list; p != NULL; p = p->next)
- {
- if(p->status.remove)
- continue;
- if(p->status.active && p->status.meta)
- {
- if(send_ping(p))
- terminate_connection(p);
- else
- {
- p->status.pinged = 1;
- p->status.got_pong = 0;
- }
- }
- }
+ if(p->nexthop == cl)
+ {
+ p->status.active = 0;
+ p->status.remove = 1;
+ }
+
+cp
+ /* Then send a notification about all these connections to all hosts
+ that are still connected to us. */
+ for(p = conn_list; p != NULL; p = p->next)
+ if(p->status.active && p->status.meta)
+ for(q = conn_list; q != NULL; q = q->next)
+ if(q->status.remove)
+ send_del_host(p, q);
- last_ping_time = time(NULL);
cp
- return 0;
}
/*
- end all connections that did not respond
- to the ping probe in time
+ Check if the other end is active.
+ If we have sent packets, but didn't receive any,
+ then possibly the other end is dead. We send a
+ PING request over the meta connection. If the other
+ end does not reply in time, we consider them dead
+ and close the connection.
*/
int check_dead_connections(void)
{
conn_list_t *p;
+ time_t now;
cp
+ now = time(NULL);
for(p = conn_list; p != NULL; p = p->next)
{
if(p->status.remove)
continue;
- if(p->status.active && p->status.meta && p->status.pinged && !p->status.got_pong)
+ if(p->status.active && p->status.meta)
{
- syslog(LOG_INFO, "%s (" IP_ADDR_S ") didn't respond to ping",
- p->hostname, IP_ADDR_V(p->vpn_ip));
- p->status.timeout = 1;
- terminate_connection(p);
+ if(p->last_ping_time + timeout < now)
+ {
+ if(p->status.pinged && !p->status.got_pong)
+ {
+ if(debug_lvl > 1)
+ syslog(LOG_INFO, _(IP_ADDR_S " (%s) didn't respond to ping"),
+ IP_ADDR_V(p->vpn_ip), p->hostname);
+ p->status.timeout = 1;
+ terminate_connection(p);
+ }
+ else if(p->want_ping)
+ {
+ send_ping(p);
+ p->last_ping_time = now;
+ p->status.pinged = 1;
+ p->status.got_pong = 0;
+ }
+ }
}
}
cp
{
conn_list_t *ncn;
struct sockaddr client;
- int nfd, len = sizeof(struct sockaddr);
+ int nfd, len = sizeof(client);
cp
if((nfd = accept(cl->meta_socket, &client, &len)) < 0)
{
- syslog(LOG_ERR, "Accepting a new connection failed: %m");
+ syslog(LOG_ERR, _("Accepting a new connection failed: %m"));
return -1;
}
{
shutdown(nfd, 2);
close(nfd);
- syslog(LOG_NOTICE, "Closed attempted connection.");
+ syslog(LOG_NOTICE, _("Closed attempted connection"));
return 0;
}
*/
int handle_incoming_meta_data(conn_list_t *cl)
{
- int x, l = sizeof(x), lenin;
- unsigned char tmp[1600];
- int request;
+ int x, l = sizeof(x);
+ int request, oldlen, i;
+ int lenin = 0;
cp
if(getsockopt(cl->meta_socket, SOL_SOCKET, SO_ERROR, &x, &l) < 0)
{
- syslog(LOG_ERR, "This is a bug: %s:%d: %d:%m", __FILE__, __LINE__, cl->meta_socket);
+ syslog(LOG_ERR, _("This is a bug: %s:%d: %d:%m"), __FILE__, __LINE__, cl->meta_socket);
return -1;
}
if(x)
{
- syslog(LOG_ERR, "Metadata socket error: %s", sys_errlist[x]);
+ syslog(LOG_ERR, _("Metadata socket error: %s"), sys_errlist[x]);
return -1;
}
- if((lenin = recv(cl->meta_socket, &tmp, sizeof(tmp), 0)) <= 0)
+ if(cl->buflen >= MAXBUFSIZE)
{
- syslog(LOG_ERR, "Receive failed: %m");
+ syslog(LOG_ERR, _("Metadata read buffer overflow!"));
return -1;
}
- request = (int)(tmp[0]);
+ lenin = read(cl->meta_socket, cl->buffer, MAXBUFSIZE-cl->buflen);
- if(debug_lvl > 3)
- syslog(LOG_DEBUG, "got request %d", request);
-
- if(request_handlers[request] == NULL)
- syslog(LOG_ERR, "Unknown request %d.", request);
- else
- if(request_handlers[request](cl, tmp, lenin) < 0)
+ if(lenin<=0)
+ {
+ syslog(LOG_ERR, _("Metadata socket read error: %m"));
return -1;
+ }
+
+ oldlen = cl->buflen;
+ cl->buflen += lenin;
+
+ for(;;)
+ {
+ cl->reqlen = 0;
+
+ for(i = oldlen; i < cl->buflen; i++)
+ {
+ if(cl->buffer[i] == '\n')
+ {
+ cl->buffer[i] = 0; /* replace end-of-line by end-of-string so we can use sscanf */
+ cl->reqlen = i + 1;
+ break;
+ }
+ }
+
+ if(cl->reqlen)
+ {
+ if(debug_lvl > 2)
+ syslog(LOG_DEBUG, _("Got request from " IP_ADDR_S " (%s): %s"),
+ IP_ADDR_V(cl->vpn_ip), cl->hostname, cl->buffer);
+ if(sscanf(cl->buffer, "%d", &request) == 1)
+ {
+ if((request < 0) || (request > 255) || (request_handlers[request] == NULL))
+ {
+ syslog(LOG_ERR, _("Unknown request from " IP_ADDR_S " (%s)"),
+ IP_ADDR_V(cl->vpn_ip), cl->hostname);
+ return -1;
+ }
+
+ if(request_handlers[request](cl)) /* Something went wrong. Probably scriptkiddies. Terminate. */
+ {
+ syslog(LOG_ERR, _("Error while processing request from " IP_ADDR_S " (%s)"),
+ IP_ADDR_V(cl->vpn_ip), cl->hostname);
+ return -1;
+ }
+ }
+ else
+ {
+ syslog(LOG_ERR, _("Bogus data received from " IP_ADDR_S " (%s)"),
+ IP_ADDR_V(cl->vpn_ip), cl->hostname);
+ return -1;
+ }
+
+ cl->buflen -= cl->reqlen;
+ memmove(cl->buffer, cl->buffer + cl->reqlen, cl->buflen);
+ oldlen = 0;
+ }
+ else
+ {
+ break;
+ }
+ }
+
+ cl->last_ping_time = time(NULL);
+ cl->want_ping = 0;
cp
return 0;
}
if(p->status.remove)
continue;
- if(p->status.active)
+ if(p->status.dataopen)
if(FD_ISSET(p->socket, f))
{
/*
I've once got here when it said `No route to host'.
*/
getsockopt(p->socket, SOL_SOCKET, SO_ERROR, &x, &l);
- syslog(LOG_ERR, "Outgoing data socket error: %s", sys_errlist[x]);
+ syslog(LOG_ERR, _("Outgoing data socket error: %s"), sys_errlist[x]);
terminate_connection(p);
return;
}
memset(&vp, 0, sizeof(vp));
if((lenin = read(tap_fd, &vp, MTU)) <= 0)
{
- syslog(LOG_ERR, "Error while reading from tapdevice: %m");
+ syslog(LOG_ERR, _("Error while reading from tapdevice: %m"));
return;
}
ether_type = ntohs(*((unsigned short*)(&vp.data[12])));
if(ether_type != 0x0800)
{
- if(debug_lvl > 0)
- syslog(LOG_INFO, "Non-IP ethernet frame %04x from " MAC_ADDR_S,
+ if(debug_lvl > 3)
+ syslog(LOG_INFO, _("Non-IP ethernet frame %04x from " MAC_ADDR_S),
ether_type, MAC_ADDR_V(vp.data[6]));
return;
}
if(lenin < 32)
{
- if(debug_lvl > 0)
- syslog(LOG_INFO, "Dropping short packet");
+ if(debug_lvl > 3)
+ syslog(LOG_INFO, _("Dropping short packet"));
return;
}
from = ntohl(*((unsigned long*)(&vp.data[26])));
to = ntohl(*((unsigned long*)(&vp.data[30])));
- if(debug_lvl > 2)
- syslog(LOG_DEBUG, "An IP packet (%04x) for " IP_ADDR_S " from " IP_ADDR_S,
- ether_type, IP_ADDR_V(to), IP_ADDR_V(from));
- if(debug_lvl > 3)
- syslog(LOG_DEBUG, MAC_ADDR_S " to " MAC_ADDR_S,
- MAC_ADDR_V(vp.data[0]), MAC_ADDR_V(vp.data[6]));
-
vp.len = (length_t)lenin - 2;
strip_mac_addresses(&vp);
}
/*
- this is where it al happens...
+ this is where it all happens...
*/
void main_loop(void)
{
fd_set fset;
struct timeval tv;
int r;
+ time_t last_ping_check;
cp
- last_ping_time = time(NULL);
+ last_ping_check = time(NULL);
for(;;)
{
{
if(errno == EINTR) /* because of alarm */
continue;
- syslog(LOG_ERR, "Error while waiting for input: %m");
+ syslog(LOG_ERR, _("Error while waiting for input: %m"));
return;
}
- if(r == 0 || last_ping_time + timeout < time(NULL))
- /* Timeout... hm... something might be wrong. */
+ if(last_ping_check + timeout < time(NULL))
+ /* Let's check if everybody is still alive */
{
check_dead_connections();
- send_broadcast_ping();
+ last_ping_check = time(NULL);
continue;
}
projects / tinc / blobdiff