/*
net.c -- most of the network code
- Copyright (C) 1998,1999,2000 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 1.35.4.6 2000/06/26 17:20:58 guus Exp $
*/
#include "config.h"
#include "netutl.h"
#include "protocol.h"
+#include "system.h"
+
int tap_fd = -1;
int total_tap_in = 0;
rp.len = htons(rp.len);
if(debug_lvl > 3)
- syslog(LOG_ERR, "Sent %d bytes to %lx", ntohs(rp.len), cl->vpn_ip);
+ syslog(LOG_ERR, _("Sent %d bytes to %lx"), ntohs(rp.len), cl->vpn_ip);
if((r = send(cl->socket, (char*)&rp, ntohs(rp.len), 0)) < 0)
{
- syslog(LOG_ERR, "Error sending data: %m");
+ syslog(LOG_ERR, _("Error sending data: %m"));
return -1;
}
add_mac_addresses(&vp);
if((lenin = write(tap_fd, &vp, vp.len + sizeof(vp.len))) < 0)
- syslog(LOG_ERR, "Can't write to tap device: %m");
+ syslog(LOG_ERR, _("Can't write to tap device: %m"));
else
total_tap_out += lenin;
queue_element_t *e;
cp
if(debug_lvl > 3)
- syslog(LOG_DEBUG, "packet to queue: %d", s);
+ syslog(LOG_DEBUG, _("packet to queue: %d"), s);
e = xmalloc(sizeof(*e));
e->packet = xmalloc(s);
}
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 > 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;
}
}
+ /* 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 > 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((cl = lookup_conn(cl->vpn_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.active)
{
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));
+ if(debug_lvl > 3)
+ 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? */
}
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
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!"));
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)
+ 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;
}
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.",
+ syslog(LOG_ERR, _("Still failed to connect to other, will retry in %d seconds"),
seconds_till_retry);
}
cp
signal(SIGALRM, sigalrm_handler);
seconds_till_retry = 300;
alarm(seconds_till_retry);
- syslog(LOG_NOTICE, "Try to re-establish outgoing connection in 5 minutes.");
+ 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 " IP_ADDR_S), IP_ADDR_V(cl->real_ip));
nfd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
if(nfd == -1)
{
- syslog(LOG_ERR, "Creating data socket failed: %m");
+ syslog(LOG_ERR, _("Creating data socket failed: %m"));
return -1;
}
if(connect(nfd, (struct sockaddr *)&a, sizeof(a)) == -1)
{
- syslog(LOG_ERR, "Connecting to " IP_ADDR_S ":%d failed: %m",
+ syslog(LOG_ERR, _("Connecting to " IP_ADDR_S ":%d failed: %m"),
IP_ADDR_V(cl->real_ip), 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;
p->buflen = 0;
p->last_ping_time = time(NULL);
p->want_ping = 0;
- syslog(LOG_NOTICE, "Connection from %s:%d", p->hostname, htons(ci.sin_port));
+ 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 data failed: %m"));
return -1;
}
total_socket_in += lenin;
{
f = lookup_conn(rp.from);
if(debug_lvl > 3)
- syslog(LOG_DEBUG, "packet from " IP_ADDR_S " (len %d)",
+ 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,
+ syslog(LOG_ERR, _("Got packet from unknown source " IP_ADDR_S),
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);
signal(SIGALRM, sigalrm_handler);
seconds_till_retry = 5;
alarm(seconds_till_retry);
- syslog(LOG_NOTICE, "Try to re-establish outgoing connection in 5 seconds.");
+ syslog(LOG_NOTICE, _("Trying to re-establish outgoing connection in 5 seconds"));
}
cl->status.active = 0;
cl->status.remove = 1;
+
+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->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.remove && p->status.meta)
+ for(q = conn_list; q != NULL; q = q->next)
+ if(q->status.remove)
+ send_del_host(p, q);
+
cp
}
{
if(p->status.pinged && !p->status.got_pong)
{
- syslog(LOG_INFO, "%s (" IP_ADDR_S ") didn't respond to ping",
- p->hostname, IP_ADDR_V(p->vpn_ip));
+ 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);
}
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;
}
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(cl->buflen >= MAXBUFSIZE)
{
- syslog(LOG_ERR, "Metadata read buffer full! Discarding contents.");
- cl->buflen = 0;
+ syslog(LOG_ERR, _("Metadata read buffer overflow!"));
+ return -1;
}
lenin = read(cl->meta_socket, cl->buffer, MAXBUFSIZE-cl->buflen);
if(lenin<=0)
{
- syslog(LOG_ERR, "Metadata socket read error: %m");
+ syslog(LOG_ERR, _("Metadata socket read error: %m"));
return -1;
}
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_handlers[request] == NULL)
+ if((request < 0) || (request > 255) || (request_handlers[request] == NULL))
{
- syslog(LOG_ERR, "Unknown request: %s", cl->buffer);
- return 0;
+ syslog(LOG_ERR, _("Unknown request from " IP_ADDR_S " (%s)"),
+ IP_ADDR_V(cl->vpn_ip), cl->hostname);
+ return -1;
}
- if(debug_lvl > 3)
- syslog(LOG_DEBUG, "Got request: %s", cl->buffer);
-
- request_handlers[request](cl);
+ 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: %s", cl->buffer);
+ 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;
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;
}
to = ntohl(*((unsigned long*)(&vp.data[30])));
if(debug_lvl > 3)
- syslog(LOG_DEBUG, "An IP packet (%04x) for " IP_ADDR_S " from " IP_ADDR_S,
+ 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 > 4)
- syslog(LOG_DEBUG, MAC_ADDR_S " to " MAC_ADDR_S,
+ 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;
{
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;
}
projects / tinc / blobdiff