along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- $Id: net.c,v 1.35.4.35 2000/10/14 17:04:13 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 <syslog.h>
#include <unistd.h>
+#ifdef HAVE_TUNTAP
+#include LINUX_IF_TUN_H
+#endif
+
#include <utils.h>
#include <xalloc.h>
#include "system.h"
int tap_fd = -1;
-
+int taptype = 0;
int total_tap_in = 0;
int total_tap_out = 0;
int total_socket_in = 0;
int total_socket_out = 0;
-int upstreamindex = 0;
+config_t *upstreamcfg;
static int seconds_till_retry;
+char *unknown = NULL;
+
/*
strip off the MAC adresses of an ethernet frame
*/
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;
+ char *envvar;
+ struct ifreq ifr;
+
cp
- if((cfg = get_config_val(config, tapdevice)) == NULL)
- tapfname = "/dev/tap0";
- else
+ if((cfg = get_config_val(config, tapdevice)))
tapfname = cfg->data.ptr;
-
+ else
+#ifdef HAVE_TUNTAP
+ tapfname = "/dev/misc/net/tun";
+#else
+ tapfname = "/dev/tap0";
+#endif
+cp
if((nfd = open(tapfname, O_RDWR | O_NONBLOCK)) < 0)
{
syslog(LOG_ERR, _("Could not open %s: %m"), tapfname);
return -1;
}
-
+cp
tap_fd = nfd;
+
+ taptype = 0;
+
+#ifdef HAVE_TUNTAP
+ /* Ok now check if this is an old ethertap or a new tun/tap thingie */
+ memset(&ifr, 0, sizeof(ifr));
+cp
+ ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
+ if (netname)
+ strncpy(ifr.ifr_name, netname, IFNAMSIZ);
+cp
+ if (!ioctl(tap_fd, TUNSETIFF, (void *) &ifr))
+ {
+ 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);
+
+ cl->status.meta = 1;
cp
return 0;
}
an authentication sequence during which
we will do just that.
*/
-int setup_outgoing_connection(char *hostname)
+int setup_outgoing_connection(char *name)
{
conn_list_t *ncn;
struct hostent *h;
+ config_t *cfg;
cp
- if(!(h = gethostbyname(hostname)))
+ if(check_id(name))
{
- syslog(LOG_ERR, _("Error looking up `%s': %m"), hostname);
+ syslog(LOG_ERR, _("Invalid name for outgoing connection"));
return -1;
}
ncn = new_conn_list();
+ asprintf(&ncn->name, "%s", name);
+
+ if(read_host_config(ncn))
+ {
+ syslog(LOG_ERR, _("Error reading host configuration file for %s"));
+ free_conn_list(ncn);
+ return -1;
+ }
+
+ if(!(cfg = get_config_val(ncn->config, address)))
+ {
+ syslog(LOG_ERR, _("No address specified for %s"));
+ free_conn_list(ncn);
+ return -1;
+ }
+
+ if(!(h = gethostbyname(cfg->data.ptr)))
+ {
+ syslog(LOG_ERR, _("Error looking up `%s': %m"), cfg->data.ptr);
+ free_conn_list(ncn);
+ return -1;
+ }
+
ncn->address = ntohl(*((ip_t*)(h->h_addr_list[0])));
ncn->hostname = hostlookup(htonl(ncn->address));
return -1;
}
- ncn->status.meta = 1;
ncn->status.outgoing = 1;
- ncn->next = conn_list;
- conn_list = ncn;
+ ncn->buffer = xmalloc(MAXBUFSIZE);
+ ncn->buflen = 0;
+ ncn->last_ping_time = time(NULL);
+ ncn->want_ping = 0;
+
+ conn_list_add(ncn);
+
+ send_id(ncn);
cp
return 0;
}
/*
- 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();
asprintf(&myself->hostname, "MYSELF"); /* FIXME? Do hostlookup on ourselves? */
myself->flags = 0;
+ myself->protocol_version = PROT_CURRENT;
if(!(cfg = get_config_val(config, tincname))) /* Not acceptable */
{
return -1;
}
else
- myself->name = (char*)cfg->data.val;
+ asprintf(&myself->name, "%s", (char*)cfg->data.val);
if(check_id(myself->name))
{
syslog(LOG_ERR, _("Invalid name for myself!"));
return -1;
}
+cp
+ if(!(cfg = get_config_val(config, privatekey)))
+ {
+ syslog(LOG_ERR, _("Private key for tinc daemon required!"));
+ return -1;
+ }
+ else
+ {
+ myself->rsa_key = RSA_new();
+ BN_hex2bn(&myself->rsa_key->d, cfg->data.ptr);
+ BN_hex2bn(&myself->rsa_key->e, "FFFF");
+ }
if(read_host_config(myself))
{
syslog(LOG_ERR, _("Cannot open host configuration file for myself!"));
return -1;
}
-
+cp
+ if(!(cfg = get_config_val(myself->config, publickey)))
+ {
+ syslog(LOG_ERR, _("Public key for tinc daemon required!"));
+ return -1;
+ }
+ else
+ {
+ BN_hex2bn(&myself->rsa_key->n, cfg->data.ptr);
+ }
+/*
+ if(RSA_check_key(myself->rsa_key) != 1)
+ {
+ syslog(LOG_ERR, _("Invalid public/private keypair!"));
+ return -1;
+ }
+*/
if(!(cfg = get_config_val(myself->config, port)))
myself->port = 655;
else
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"));
+ 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;
}
{
config_t const *cfg;
cp
-/* FIXME! Use name instead of upstreamip.
- cfg = get_next_config_val(config, upstreamip, upstreamindex++);
-*/
+ cfg = get_config_val(upstreamcfg, connectto);
+
+ 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, upstreamip, 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, upstreamip, 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, upstreamip, 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);
return NULL;
}
+ p->name = unknown;
p->address = ntohl(ci.sin_addr.s_addr);
p->hostname = hostlookup(ci.sin_addr.s_addr);
p->meta_socket = sfd;
p->status.meta = 1;
+ p->buffer = xmalloc(MAXBUFSIZE);
p->buflen = 0;
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));
- if(send_id(p) < 0)
- {
- free_conn_list(p);
- return NULL;
- }
+ p->allow_request = ID;
cp
return p;
}
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((lenin = read(tap_fd, &vp, MTU)) <= 0)
+ if(taptype = 1)
{
- syslog(LOG_ERR, _("Error while reading from tapdevice: %m"));
- return;
+ if((lenin = read(tap_fd, vp.data, MTU)) <= 0)
+ {
+ syslog(LOG_ERR, _("Error while reading from tapdevice: %m"));
+ return;
+ }
+ vp.len = lenin;
+ }
+ else
+ {
+ if((lenin = read(tap_fd, &vp, MTU)) <= 0)
+ {
+ syslog(LOG_ERR, _("Error while reading from tapdevice: %m"));
+ return;
+ }
+ vp.len = lenin - 2;
}
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])));
-
- vp.len = (length_t)lenin - 2;
-
- strip_mac_addresses(&vp);
+ 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