along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- $Id: net.c,v 1.35.4.2 2000/06/24 12:35:42 guus Exp $
+ $Id: net.c,v 1.35.4.11 2000/06/27 21:05:07 guus Exp $
*/
#include "config.h"
int total_socket_in = 0;
int total_socket_out = 0;
+int upstreamindex = 0;
static int seconds_till_retry;
/* The global list of existing connections */
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, _("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, 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;
}
do_decrypt((real_packet_t*)packet, &vp, cl->key);
add_mac_addresses(&vp);
+ 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
{
queue_element_t *e;
cp
- if(debug_lvl > 3)
- syslog(LOG_DEBUG, _("packet to queue: %d"), s);
-
e = xmalloc(sizeof(*e));
e->packet = xmalloc(s);
memcpy(e->packet, packet, s);
}
if(debug_lvl > 3)
- syslog(LOG_DEBUG, _("queue flushed"));
+ syslog(LOG_DEBUG, _("Queue flushed"));
cp
}
cp
if(cl->sq)
{
- if(debug_lvl > 1)
+ 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)
+ 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));
}
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 > 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(cl->flags & INDIRECTDATA)
{
- if((cl = lookup_conn(cl->vpn_ip)) == NULL)
+ 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 > 2)
- {
- syslog(LOG_NOTICE, _("indirect look up " IP_ADDR_S " in connection list failed."),
+ 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 > 1)
- {
- syslog(LOG_NOTICE, _("double indirection for " IP_ADDR_S),
- IP_ADDR_V(to));
- }
- return -1;
+ {
+ 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))
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(cl->vpn_ip); /* Keys should be sent to the host running the tincd */
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? */
}
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
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;
}
}
myself->vpn_ip = cfg->data.ip->ip;
+ myself->hostname = hostlookup(htonl(myself->vpn_ip));
myself->vpn_mask = cfg->data.ip->mask;
myself->flags = 0;
myself->port = cfg->data.val;
if(cfg = get_config_val(indirectdata))
- if(cfg->data.val)
+ if(cfg->data.val == stupid_true)
myself->flags |= EXPORTINDIRECTDATA;
if((myself->meta_socket = setup_listen_meta_socket(myself->port)) < 0)
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;
}
{
config_t const *cfg;
cp
- cfg = get_config_val(upstreamip);
+ cfg = get_next_config_val(upstreamip, upstreamindex++);
- if(!setup_outgoing_connection(cfg->data.ip->ip))
+ while(cfg)
{
- signal(SIGALRM, SIG_IGN);
- }
- else
- {
- signal(SIGALRM, sigalrm_handler);
- 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);
+ 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
}
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))
+ while(cfg)
{
- signal(SIGALRM, sigalrm_handler);
- seconds_till_retry = 300;
- alarm(seconds_till_retry);
- syslog(LOG_NOTICE, _("Try to re-establish outgoing connection in 5 minutes."));
+ 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, _("Connecting to " IP_ADDR_S ":%d failed: %m"),
- IP_ADDR_V(cl->real_ip), cl->port);
+ syslog(LOG_ERR, _("Connecting to %s port %d failed: %m"),
+ cl->hostname, cl->port);
return -1;
}
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));
+ if(debug_lvl > 0)
+ syslog(LOG_NOTICE, _("Connection from %s port %d"),
+ p->hostname, htons(ci.sin_port));
if(send_basic_info(p) < 0)
{
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;
if(rp.len >= 0)
{
f = lookup_conn(rp.from);
- if(debug_lvl > 3)
- 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;
}
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;
+ /* 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). */
/* 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)
+ 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);
{
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);
}
{
shutdown(nfd, 2);
close(nfd);
- syslog(LOG_NOTICE, _("Closed attempted connection."));
+ syslog(LOG_NOTICE, _("Closed attempted connection"));
return 0;
}
if(cl->buflen >= MAXBUFSIZE)
{
- syslog(LOG_ERR, _("Metadata read buffer overflow."));
+ syslog(LOG_ERR, _("Metadata read buffer overflow!"));
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 < 0) || (request > 255) || (request_handlers[request] == NULL))
{
- syslog(LOG_ERR, _("Unknown request: %s"), cl->buffer);
+ 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);
-
if(request_handlers[request](cl)) /* Something went wrong. Probably scriptkiddies. Terminate. */
{
- syslog(LOG_ERR, _("Error while processing request from " IP_ADDR_S), IP_ADDR_V(cl->real_ip));
+ 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."));
+ syslog(LOG_ERR, _("Bogus data received from " IP_ADDR_S " (%s)"),
+ IP_ADDR_V(cl->vpn_ip), cl->hostname);
return -1;
}
ether_type = ntohs(*((unsigned short*)(&vp.data[12])));
if(ether_type != 0x0800)
{
- if(debug_lvl > 0)
+ 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)
+ 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 > 3)
- 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),
- MAC_ADDR_V(vp.data[0]), MAC_ADDR_V(vp.data[6]));
-
vp.len = (length_t)lenin - 2;
strip_mac_addresses(&vp);
projects / tinc / blobdiff