along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- $Id: net.c,v 1.35.4.16 2000/06/30 11:45:14 guus Exp $
+ $Id: net.c,v 1.35.4.32 2000/09/26 14:06:04 guus Exp $
*/
#include "config.h"
#include "net.h"
#include "netutl.h"
#include "protocol.h"
+#include "meta.h"
#include "system.h"
int xsend(conn_list_t *cl, void *packet)
{
- int r;
real_packet_t rp;
cp
- do_encrypt((vpn_packet_t*)packet, &rp, cl->key);
+ do_encrypt((vpn_packet_t*)packet, &rp, cl->datakey);
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, _("Sending packet of %d bytes to %s (%s)"),
- ntohs(rp.len), cl->vpn_hostname, cl->real_hostname);
+ ntohs(rp.len), cl->name, cl->hostname);
+
+ total_socket_out += ntohs(rp.len);
+
+ cl->want_ping = 1;
- if((r = send(cl->socket, (char*)&rp, ntohs(rp.len), 0)) < 0)
+ if((cl->flags | myself->flags) & TCPONLY)
+ return send_tcppacket(cl, (void*)&rp, ntohs(rp.len));
+
+ if((send(cl->socket, (char*)&rp, ntohs(rp.len), 0)) < 0)
{
syslog(LOG_ERR, _("Error sending packet to %s (%s): %m"),
- cl->vpn_hostname, cl->real_hostname);
+ cl->name, cl->hostname);
return -1;
}
-
- total_socket_out += r;
-
- cl->want_ping = 1;
cp
return 0;
}
vpn_packet_t vp;
int lenin;
cp
- do_decrypt((real_packet_t*)packet, &vp, cl->key);
+ do_decrypt((real_packet_t*)packet, &vp, cl->datakey);
add_mac_addresses(&vp);
if(debug_lvl > 3)
syslog(LOG_ERR, _("Receiving packet of %d bytes from %s (%s)"),
- ((real_packet_t*)packet)->len, cl->vpn_hostname, cl->real_hostname);
+ ((real_packet_t*)packet)->len, cl->name, cl->hostname);
if((lenin = write(tap_fd, &vp, vp.len + sizeof(vp.len))) < 0)
syslog(LOG_ERR, _("Can't write to tap device: %m"));
{
if(debug_lvl > 3)
syslog(LOG_DEBUG, _("Flushing send queue for %s (%s)"),
- cl->vpn_hostname, cl->real_hostname);
+ cl->name, cl->hostname);
flush_queue(cl, &(cl->sq), xsend);
}
{
if(debug_lvl > 3)
syslog(LOG_DEBUG, _("Flushing receive queue for %s (%s)"),
- cl->vpn_hostname, cl->real_hostname);
+ cl->name, cl->hostname);
flush_queue(cl, &(cl->rq), xrecv);
}
cp
syslog(LOG_NOTICE, _("Trying to look up %d.%d.%d.%d 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! */
+ /* The next few lines will be obsoleted, if we are going indirect, matching subnet_t
+ should point to only our uplink as the recepient
+ */
+
if(myself->flags & EXPORTINDIRECTDATA)
{
for(cl = conn_list; cl != NULL && !cl->status.outgoing; cl = cl->next);
{
if(debug_lvl > 3)
syslog(LOG_NOTICE, _("Indirect packet to %s via %s"),
- cl->vpn_hostname, cl->real_hostname);
+ cl->name, cl->hostname);
if((cl = lookup_conn(cl->real_ip)) == NULL)
{
if(debug_lvl > 3)
- syslog(LOG_NOTICE, _("Indirect look up %d.%d.%d.%d in connection list failed!"),
- IP_ADDR_V(to));
+ syslog(LOG_NOTICE, _("Indirect look up %d.%d.%d.%d in connection list failed!"), IP_ADDR_V(to));
/* Gateway tincd dead? Should we kill it? (GS) */
if(cl->flags & INDIRECTDATA) /* This should not happen */
{
if(debug_lvl > 3)
- syslog(LOG_NOTICE, _("Double indirection for %d.%d.%d.%d"),
- IP_ADDR_V(to));
+ syslog(LOG_NOTICE, _("Double indirection for %d.%d.%d.%d"), IP_ADDR_V(to));
return -1;
}
}
if(!cl->status.dataopen)
if(setup_vpn_connection(cl) < 0)
{
- syslog(LOG_ERR, _("Could not open UDP connection to %s (%s)"), cl->vpn_hostname, cl->real_hostname);
+ syslog(LOG_ERR, _("Could not open UDP connection to %s (%s)"),
+ cl->name, cl->hostname);
return -1;
}
if(!cl->status.validkey)
{
if(debug_lvl > 3)
- syslog(LOG_INFO, _("%s (%s) has no valid key, queueing packet"), cl->vpn_hostname, cl->real_hostname);
+ syslog(LOG_INFO, _("%s (%s) has no valid key, queueing packet"),
+ cl->name, 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, _("%s (%s) is not ready, queueing packet"), cl->vpn_hostname, cl->real_hostname);
+ syslog(LOG_INFO, _("%s (%s) is not ready, queueing packet"),
+ cl->name, cl->hostname);
add_queue(&(cl->sq), packet, packet->len + 2);
return 0; /* We don't want to mess up, do we? */
}
int nfd, flags;
struct sockaddr_in a;
const int one = 1;
+ config_t const *cfg;
cp
if((nfd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) < 0)
{
return -1;
}
+ if(setsockopt(nfd, SOL_SOCKET, SO_KEEPALIVE, &one, sizeof(one)))
+ {
+ syslog(LOG_ERR, _("setsockopt: %m"));
+ return -1;
+ }
+
flags = fcntl(nfd, F_GETFL);
if(fcntl(nfd, F_SETFL, flags | O_NONBLOCK) < 0)
{
return -1;
}
+ if((cfg = get_config_val(interface)))
+ {
+ if(setsockopt(nfd, SOL_SOCKET, SO_KEEPALIVE, cfg->data.ptr, strlen(cfg->data.ptr)))
+ {
+ syslog(LOG_ERR, _("Unable to bind listen socket to interface %s: %m"), cfg->data.ptr);
+ return -1;
+ }
+ }
+
memset(&a, 0, sizeof(a));
a.sin_family = AF_INET;
a.sin_port = htons(port);
- a.sin_addr.s_addr = htonl(INADDR_ANY);
+
+ if((cfg = get_config_val(interfaceip)))
+ a.sin_addr.s_addr = htonl(cfg->data.ip->ip);
+ else
+ a.sin_addr.s_addr = htonl(INADDR_ANY);
if(bind(nfd, (struct sockaddr *)&a, sizeof(struct sockaddr)))
{
config_t const *cfg;
cp
if(debug_lvl > 0)
- syslog(LOG_INFO, _("Trying to connect to %s"), cl->real_hostname);
+ syslog(LOG_INFO, _("Trying to connect to %s"), cl->hostname);
if((cfg = get_config_val(upstreamport)) == NULL)
cl->port = 655;
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 for %s port %d failed: %m"),
+ cl->hostname, cl->port);
return -1;
}
if(connect(cl->meta_socket, (struct sockaddr *)&a, sizeof(a)) == -1)
{
- syslog(LOG_ERR, _("%s port %hd: %m"), cl->real_hostname, cl->port);
+ syslog(LOG_ERR, _("%s port %hd: %m"), cl->hostname, 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 for %s port %d: %m"),
+ cl->hostname, cl->port);
return -1;
}
- syslog(LOG_INFO, _("Connected to %s port %hd"),
- cl->real_hostname, cl->port);
+ if(debug_lvl > 0)
+ syslog(LOG_INFO, _("Connected to %s port %hd"),
+ cl->hostname, cl->port);
cp
return 0;
}
an authentication sequence during which
we will do just that.
*/
-int setup_outgoing_connection(ip_t ip)
+int setup_outgoing_connection(char *hostname)
{
conn_list_t *ncn;
+ struct hostent *h;
cp
+ if(!(h = gethostbyname(hostname)))
+ {
+ syslog(LOG_ERR, _("Error looking up `%s': %m"), hostname);
+ return -1;
+ }
+
ncn = new_conn_list();
- ncn->real_ip = ip;
- ncn->real_hostname = hostlookup(htonl(ip));
+ ncn->real_ip = ntohl(*((ip_t*)(h->h_addr_list[0])));
+ ncn->hostname = hostlookup(htonl(ncn->real_ip));
if(setup_outgoing_meta_socket(ncn) < 0)
{
syslog(LOG_ERR, _("Could not set up a meta connection to %s"),
- ncn->real_hostname);
+ ncn->hostname);
free_conn_element(ncn);
return -1;
}
}
myself->vpn_ip = cfg->data.ip->ip;
- myself->vpn_hostname = hostlookup(htonl(myself->vpn_ip));
- myself->real_hostname = hostlookup(htonl(myself->vpn_ip));
+ myself->hostname = hostlookup(htonl(myself->vpn_ip));
myself->vpn_mask = cfg->data.ip->mask;
myself->flags = 0;
+ if(!(cfg = get_config_val(tincname)))
+ asprintf(&(myself->name), IP_ADDR_S, IP_ADDR_V(myself->vpn_ip));
+ else
+ myself->name = (char*)cfg->data.val;
+
if(!(cfg = get_config_val(listenport)))
myself->port = 655;
else
myself->port = cfg->data.val;
- if(cfg = get_config_val(indirectdata))
+ if((cfg = get_config_val(indirectdata)))
if(cfg->data.val == stupid_true)
myself->flags |= EXPORTINDIRECTDATA;
+ if((cfg = get_config_val(tcponly)))
+ if(cfg->data.val == stupid_true)
+ myself->flags |= TCPONLY;
+
if((myself->meta_socket = setup_listen_meta_socket(myself->port)) < 0)
{
syslog(LOG_ERR, _("Unable to set up a listening socket"));
while(cfg)
{
- if(!setup_outgoing_connection(cfg->data.ip->ip)) /* function returns 0 when there are no problems */
+ if(!setup_outgoing_connection(cfg->data.ptr)) /* function returns 0 when there are no problems */
{
signal(SIGALRM, SIG_IGN);
return;
while(cfg)
{
- if(!setup_outgoing_connection(cfg->data.ip->ip)) /* function returns 0 when there are no problems */
+ if(!setup_outgoing_connection(cfg->data.ptr)) /* 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 */
}
struct sockaddr_in a;
cp
if(debug_lvl > 0)
- syslog(LOG_DEBUG, _("Opening UDP socket to %s"), cl->real_hostname);
+ syslog(LOG_DEBUG, _("Opening UDP socket to %s"), cl->hostname);
nfd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
if(nfd == -1)
if(connect(nfd, (struct sockaddr *)&a, sizeof(a)) == -1)
{
syslog(LOG_ERR, _("Connecting to %s port %d failed: %m"),
- cl->real_hostname, cl->port);
+ 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 %s (%s)"), __FILE__, __LINE__, nfd,
+ cl->name, cl->hostname);
return -1;
}
}
p->real_ip = ntohl(ci.sin_addr.s_addr);
- p->real_hostname = hostlookup(ci.sin_addr.s_addr);
+ p->hostname = hostlookup(ci.sin_addr.s_addr);
p->meta_socket = sfd;
p->status.meta = 1;
p->buflen = 0;
if(debug_lvl > 0)
syslog(LOG_NOTICE, _("Connection from %s port %d"),
- p->real_hostname, htons(ci.sin_port));
+ 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 %s (%s)"),
+ __FILE__, __LINE__, cl->socket,
+ cl->name, cl->hostname);
return -1;
}
if(x)
{
- syslog(LOG_ERR, _("Incoming data socket error: %s"), sys_errlist[x]);
+ syslog(LOG_ERR, _("Incoming data socket error for %s (%s): %s"),
+ cl->name, cl->hostname, strerror(x));
return -1;
}
lenin = recvfrom(cl->socket, &rp, MTU, 0, NULL, NULL);
if(lenin <= 0)
{
- syslog(LOG_ERR, _("Receiving packet from %s failed: %m"), cl->real_hostname);
+ syslog(LOG_ERR, _("Receiving packet from %s (%s) failed: %m"),
+ cl->name, cl->hostname);
return -1;
}
total_socket_in += lenin;
if(!f)
{
syslog(LOG_ERR, _("Got packet from %s (%s) with unknown origin %d.%d.%d.%d?"),
- cl->vpn_hostname, cl->real_hostname, IP_ADDR_V(rp.from));
+ cl->name, cl->hostname, IP_ADDR_V(rp.from));
return -1;
}
*/
void terminate_connection(conn_list_t *cl)
{
- conn_list_t *p, *q;
+ conn_list_t *p;
cp
if(cl->status.remove)
if(debug_lvl > 0)
syslog(LOG_NOTICE, _("Closing connection with %s (%s)"),
- cl->vpn_hostname, cl->real_hostname);
+ cl->name, cl->hostname);
if(cl->status.timeout)
send_timeout(cl);
{
if(debug_lvl > 1)
syslog(LOG_INFO, _("%s (%s) didn't respond to PING"),
- p->vpn_hostname, p->real_hostname);
+ p->name, p->hostname);
p->status.timeout = 1;
terminate_connection(p);
}
return 0;
}
-/*
- dispatch any incoming meta requests
-*/
-int handle_incoming_meta_data(conn_list_t *cl)
-{
- 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);
- return -1;
- }
- if(x)
- {
- syslog(LOG_ERR, _("Metadata socket error: %s"), sys_errlist[x]);
- return -1;
- }
-
- if(cl->buflen >= MAXBUFSIZE)
- {
- syslog(LOG_ERR, _("Metadata read buffer overflow!"));
- return -1;
- }
-
- lenin = read(cl->meta_socket, cl->buffer, MAXBUFSIZE-cl->buflen);
-
- if(lenin<=0)
- {
- if(errno==EINTR)
- return 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 %s (%s): %s"),
- cl->vpn_hostname, cl->real_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 %s (%s)"),
- cl->vpn_hostname, cl->real_hostname);
- return -1;
- }
-
- if(request_handlers[request](cl)) /* Something went wrong. Probably scriptkiddies. Terminate. */
- {
- syslog(LOG_ERR, _("Error while processing request from %s (%s)"),
- cl->vpn_hostname, cl->real_hostname);
- return -1;
- }
- }
- else
- {
- syslog(LOG_ERR, _("Bogus data received from %s (%s)"),
- cl->vpn_hostname, cl->real_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;
-}
-
/*
check all connections to see if anything
happened on their sockets
*/
getsockopt(p->socket, SOL_SOCKET, SO_ERROR, &x, &l);
syslog(LOG_ERR, _("Outgoing data socket error for %s (%s): %s"),
- p->vpn_hostname, p->real_hostname, sys_errlist[x]);
+ p->name, p->hostname, strerror(x));
terminate_connection(p);
return;
}
if(p->status.meta)
if(FD_ISSET(p->meta_socket, f))
- if(handle_incoming_meta_data(p) < 0)
+ if(receive_meta(p) < 0)
{
terminate_connection(p);
return;
if(ether_type != 0x0800)
{
if(debug_lvl > 3)
- syslog(LOG_INFO, _("Non-IP ethernet frame %04x from " MAC_ADDR_S),
- ether_type, MAC_ADDR_V(vp.data[6]));
+ syslog(LOG_INFO, _("Non-IP ethernet frame %04x from %02x:%02x:%02x:%02x:%02x:%02x"), ether_type, MAC_ADDR_V(vp.data[6]));
return;
}
if(lenin < 32)
{
if(debug_lvl > 3)
- syslog(LOG_INFO, _("Dropping short packet"));
+ syslog(LOG_INFO, _("Dropping short packet from %02x:%02x:%02x:%02x:%02x:%02x"), MAC_ADDR_V(vp.data[6]));
return;
}
if(sighup)
{
sighup = 0;
+ if(debug_lvl > 1)
+ syslog(LOG_INFO, _("Rereading configuration file"));
close_network_connections();
clear_config();
if(read_config_file(configfilename))
syslog(LOG_ERR, _("Unable to reread configuration file, exiting"));
exit(0);
}
+ sleep(5);
setup_network_connections();
continue;
}
projects / tinc / blobdiff