along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- $Id: net.c,v 1.35.4.41 2000/10/20 15:34:35 guus Exp $
+ $Id: net.c,v 1.35.4.45 2000/10/24 15:46:16 guus Exp $
*/
#include "config.h"
#include <arpa/inet.h>
#include <errno.h>
#include <fcntl.h>
+#include <linux/sockios.h>
+#include <net/if.h>
#include <netdb.h>
#include <netinet/in.h>
#include <stdio.h>
#include <unistd.h>
#ifdef HAVE_TUNTAP
-#include <net/if.h>
#include LINUX_IF_TUN_H
#endif
int total_socket_in = 0;
int total_socket_out = 0;
-int upstreamindex = 0;
+config_t *upstreamcfg;
static int seconds_till_retry;
char *unknown = NULL;
EVP_EncryptFinal(cl->cipher_pktctx, outpkt.data + outlen, &outpad);
outlen += outpad;
- if(debug_lvl > 3)
+ if(debug_lvl >= DEBUG_TRAFFIC)
syslog(LOG_ERR, _("Sending packet of %d bytes to %s (%s)"),
outlen, cl->name, cl->hostname);
vpn_packet_t outpkt;
int outlen, outpad;
cp
- if(debug_lvl > 3)
- syslog(LOG_ERR, _("Receiving packet of %d bytes"),
- inpkt->len);
-
outpkt.len = inpkt->len;
EVP_DecryptInit(myself->cipher_pktctx, myself->cipher_pkttype, myself->cipher_pktkey, NULL);
EVP_DecryptUpdate(myself->cipher_pktctx, outpkt.data, &outlen, inpkt->data, inpkt->len);
- /* FIXME: grok DecryptFinal
EVP_DecryptFinal(myself->cipher_pktctx, outpkt.data + outlen, &outpad);
- */
+ outlen += outpad;
+ /* FIXME sometime
add_mac_addresses(&outpkt);
-
+ */
+
if(write(tap_fd, outpkt.data, outpkt.len) < 0)
syslog(LOG_ERR, _("Can't write to tap device: %m"));
else
p = next;
}
- if(debug_lvl > 3)
+ if(debug_lvl >= DEBUG_TRAFFIC)
syslog(LOG_DEBUG, _("Queue flushed"));
cp
}
cp
if(cl->sq)
{
- if(debug_lvl > 3)
+ if(debug_lvl >= DEBUG_TRAFFIC)
syslog(LOG_DEBUG, _("Flushing send queue for %s (%s)"),
cl->name, cl->hostname);
flush_queue(cl, &(cl->sq), xsend);
if(cl->rq)
{
- if(debug_lvl > 3)
+ if(debug_lvl >= DEBUG_TRAFFIC)
syslog(LOG_DEBUG, _("Flushing receive queue for %s (%s)"),
cl->name, cl->hostname);
flush_queue(cl, &(cl->rq), xrecv);
cp
if((cl = lookup_conn_list_ipv4(to)) == NULL)
{
- if(debug_lvl > 3)
+ if(debug_lvl >= DEBUG_TRAFFIC)
{
syslog(LOG_NOTICE, _("Trying to look up %d.%d.%d.%d in connection list failed!"),
IP_ADDR_V(to));
if(!cl->status.validkey)
{
- if(debug_lvl > 3)
+ if(debug_lvl >= DEBUG_TRAFFIC)
syslog(LOG_INFO, _("No valid key known yet for %s (%s), queueing packet"),
cl->name, cl->hostname);
add_queue(&(cl->sq), packet, packet->len + 2);
if(!cl->status.active)
{
- if(debug_lvl > 3)
+ if(debug_lvl >= DEBUG_TRAFFIC)
syslog(LOG_INFO, _("%s (%s) is not ready, queueing packet"),
cl->name, cl->hostname);
add_queue(&(cl->sq), packet, packet->len + 2);
int nfd;
const char *tapfname;
config_t const *cfg;
-
-#ifdef HAVE_TUNTAP
+ char *envvar;
struct ifreq ifr;
-#endif
+
cp
if((cfg = get_config_val(config, tapdevice)))
tapfname = cfg->data.ptr;
{
syslog(LOG_INFO, _("%s is a new style tun/tap device"), tapfname);
taptype = 1;
+
if((cfg = get_config_val(config, tapsubnet)) == NULL)
syslog(LOG_INFO, _("tun/tap device will be left unconfigured"));
else
/* Setup inetaddr/netmask etc */;
}
#endif
+
+ /* Add name of network interface to environment (for scripts) */
+
+ ioctl(tap_fd, SIOCGIFNAME, (void *) &ifr);
+ asprintf(&envvar, "IFNAME=%s", ifr.ifr_name);
+ putenv(envvar);
+ free(envvar);
cp
return 0;
a.sin_port = htons(port);
if((cfg = get_config_val(config, interfaceip)))
- a.sin_addr.s_addr = htonl(cfg->data.ip->ip);
+ a.sin_addr.s_addr = htonl(cfg->data.ip->address);
else
a.sin_addr.s_addr = htonl(INADDR_ANY);
struct sockaddr_in a;
config_t const *cfg;
cp
- if(debug_lvl > 0)
+ if(debug_lvl >= DEBUG_CONNECTIONS)
syslog(LOG_INFO, _("Trying to connect to %s"), cl->hostname);
if((cfg = get_config_val(cl->config, port)) == NULL)
return -1;
}
- if(debug_lvl > 0)
+ if(debug_lvl >= DEBUG_CONNECTIONS)
syslog(LOG_INFO, _("Connected to %s port %hd"),
cl->hostname, cl->port);
}
/*
- set up the local sockets (listen only)
+ Configure conn_list_t myself and set up the local sockets (listen only)
*/
int setup_myself(void)
{
config_t const *cfg;
+ subnet_t *net;
+ int i;
cp
myself = new_conn_list();
if(cfg->data.val == stupid_true)
myself->flags |= TCPONLY;
+/* Read in all the subnets specified in the host configuration file */
+
+ for(cfg = myself->config; cfg = get_config_val(cfg, subnet); cfg = cfg->next)
+ {
+ net = new_subnet();
+ net->type = SUBNET_IPV4;
+ net->net.ipv4.address = cfg->data.ip->address;
+ net->net.ipv4.mask = cfg->data.ip->mask;
+
+ subnet_add(myself, net);
+ }
+
if((myself->meta_socket = setup_listen_meta_socket(myself->port)) < 0)
{
syslog(LOG_ERR, _("Unable to set up a listening socket!"));
{
config_t const *cfg;
cp
- cfg = get_next_config_val(config, connectto, upstreamindex++);
+ cfg = get_config_val(upstreamcfg, connectto);
- if(!upstreamindex && !cfg)
+ if(!cfg && upstreamcfg == myself->config)
/* No upstream IP given, we're listen only. */
return;
while(cfg)
{
+ upstreamcfg = cfg->next;
if(!setup_outgoing_connection(cfg->data.ptr)) /* function returns 0 when there are no problems */
{
signal(SIGALRM, SIG_IGN);
return;
}
- cfg = get_next_config_val(config, connectto, upstreamindex++); /* Or else we try the next ConnectTo line */
+ cfg = get_config_val(upstreamcfg, connectto); /* Or else we try the next ConnectTo line */
}
signal(SIGALRM, sigalrm_handler);
- upstreamindex = 0;
+ upstreamcfg = myself->config;
seconds_till_retry += 5;
if(seconds_till_retry > MAXTIMEOUT) /* Don't wait more than MAXTIMEOUT seconds. */
seconds_till_retry = MAXTIMEOUT;
int setup_network_connections(void)
{
config_t const *cfg;
+ char *scriptname;
cp
if((cfg = get_config_val(config, pingtimeout)) == NULL)
timeout = 5;
if(setup_myself() < 0)
return -1;
- if((cfg = get_next_config_val(config, connectto, upstreamindex++)) == NULL)
+ /* Run tinc-up script to further initialize the tap interface */
+
+ asprintf(&scriptname, "%s/tinc-up", confbase);
+
+ if(!fork())
+ {
+
+ execl(scriptname, NULL);
+
+ if(errno != ENOENT)
+ syslog(LOG_WARNING, _("Error while executing %s: %m"), scriptname);
+
+ exit(0);
+ }
+
+ free(scriptname);
+
+ if(!(cfg = get_config_val(myself->config, connectto)))
/* No upstream IP given, we're listen only. */
return 0;
while(cfg)
{
+ upstreamcfg = cfg->next;
if(!setup_outgoing_connection(cfg->data.ptr)) /* function returns 0 when there are no problems */
return 0;
- cfg = get_next_config_val(config, connectto, upstreamindex++); /* Or else we try the next ConnectTo line */
+ cfg = get_config_val(upstreamcfg, connectto); /* Or else we try the next ConnectTo line */
}
signal(SIGALRM, sigalrm_handler);
- upstreamindex = 0;
+ upstreamcfg = myself->config;
seconds_till_retry = MAXTIMEOUT;
syslog(LOG_NOTICE, _("Trying to re-establish outgoing connection in %d seconds"), seconds_till_retry);
alarm(seconds_till_retry);
void close_network_connections(void)
{
conn_list_t *p;
+ char *scriptname;
cp
for(p = conn_list; p != NULL; p = p->next)
{
close(myself->socket);
}
+ /* Execute tinc-down script right before shutting down the interface */
+
+ asprintf(&scriptname, "%s/tinc-down", confbase);
+
+ if(!fork())
+ {
+ execl(scriptname, NULL);
+
+ if(errno != ENOENT)
+ syslog(LOG_WARNING, _("Error while executing %s: %m"), scriptname);
+
+ exit(0);
+ }
+
+ free(scriptname);
+
close(tap_fd);
destroy_conn_list();
int nfd, flags;
struct sockaddr_in a;
cp
- if(debug_lvl > 0)
+ if(debug_lvl >= DEBUG_TRAFFIC)
syslog(LOG_DEBUG, _("Opening UDP socket to %s"), cl->hostname);
nfd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
p->last_ping_time = time(NULL);
p->want_ping = 0;
- if(debug_lvl > 0)
+ if(debug_lvl >= DEBUG_CONNECTIONS)
syslog(LOG_NOTICE, _("Connection from %s port %d"),
p->hostname, htons(ci.sin_port));
vpn_packet_t pkt;
int lenin;
int x, l = sizeof(x);
+ struct sockaddr from;
+ socklen_t fromlen = sizeof(from);
cp
if(getsockopt(myself->socket, SOL_SOCKET, SO_ERROR, &x, &l) < 0)
{
return -1;
}
- if(recvfrom(myself->socket, (char *) &(pkt.len), MTU, 0, NULL, NULL) <= 0)
+ if(recvfrom(myself->socket, (char *) &(pkt.len), MTU, 0, &from, &fromlen) <= 0)
{
syslog(LOG_ERR, _("Receiving packet failed: %m"));
return -1;
}
-
+/*
+ if(debug_lvl >= DEBUG_TRAFFIC)
+ {
+ syslog(LOG_DEBUG, _("Received packet of %d bytes from %d.%d.%d.%d"), pkt.len,
+ from.sa_addr[0], from.sa_addr[1], from.sa_addr[2], from.sa_addr[3]);
+ }
+*/
cp
return xrecv(&pkt);
}
if(cl->status.remove)
return;
- if(debug_lvl > 0)
+ if(debug_lvl >= DEBUG_CONNECTIONS)
syslog(LOG_NOTICE, _("Closing connection with %s (%s)"),
cl->name, cl->hostname);
{
if(p->status.pinged && !p->status.got_pong)
{
- if(debug_lvl > 1)
+ if(debug_lvl >= DEBUG_PROTOCOL)
syslog(LOG_INFO, _("%s (%s) didn't respond to PING"),
p->name, p->hostname);
p->status.timeout = 1;
void handle_tap_input(void)
{
vpn_packet_t vp;
- ip_t from, to;
- int ether_type, lenin;
+ int lenin;
cp
- memset(&vp, 0, sizeof(vp));
-
if(taptype = 1)
{
if((lenin = read(tap_fd, vp.data, MTU)) <= 0)
total_tap_in += lenin;
- ether_type = ntohs(*((unsigned short*)(&vp.data[12])));
- if(ether_type != 0x0800)
- {
- if(debug_lvl > 3)
- 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 from %02x:%02x:%02x:%02x:%02x:%02x"), MAC_ADDR_V(vp.data[6]));
+ if(debug_lvl >= DEBUG_TRAFFIC)
+ syslog(LOG_WARNING, _("Received short packet from tap device"));
return;
}
- from = ntohl(*((unsigned long*)(&vp.data[26])));
- to = ntohl(*((unsigned long*)(&vp.data[30])));
+ if(debug_lvl >= DEBUG_TRAFFIC)
+ {
+ syslog(LOG_DEBUG, _("Read packet of length %d from tap device"), vp.len);
+ }
- send_packet(to, &vp);
+// route_packet(&vp);
cp
}
projects / tinc / blobdiff