along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- $Id: protocol.c,v 1.27 2000/05/29 23:40:05 guus Exp $
+ $Id: protocol.c,v 1.28.4.22 2000/08/08 08:48:50 guus Exp $
*/
#include "config.h"
#include <utils.h>
#include <xalloc.h>
+#include <netinet/in.h>
+
#include "conf.h"
#include "encr.h"
#include "net.h"
int send_ack(conn_list_t *cl)
{
cp
- if(debug_lvl > 2)
- syslog(LOG_DEBUG, _("Send ACK to %s"), cl->hostname);
+ if(debug_lvl > 1)
+ syslog(LOG_DEBUG, _("Sending ACK to %s (%s)"),
+ cl->vpn_hostname, cl->real_hostname);
buflen = snprintf(buffer, MAXBUFSIZE, "%d\n", ACK);
if((write(cl->meta_socket, buffer, buflen)) < 0)
{
- syslog(LOG_ERR, _("send failed: %d:%d: %m"), __FILE__, __LINE__);
+ syslog(LOG_ERR, _("Send failed: %d:%d: %m"), __FILE__, __LINE__);
return -1;
}
-
- syslog(LOG_NOTICE, _("Connection with %s activated."), cl->hostname);
cp
return 0;
}
int send_termreq(conn_list_t *cl)
{
cp
- if(debug_lvl > 2)
- syslog(LOG_DEBUG, _("Send TERMREQ to " IP_ADDR_S),
- IP_ADDR_V(cl->vpn_ip));
+ if(debug_lvl > 1)
+ syslog(LOG_DEBUG, _("Sending TERMREQ to %s (%s)"),
+ cl->vpn_hostname, cl->real_hostname);
buflen = snprintf(buffer, MAXBUFSIZE, "%d %lx\n", TERMREQ, myself->vpn_ip);
if(write(cl->meta_socket, buffer, buflen) < 0)
{
if(debug_lvl > 1)
- syslog(LOG_ERR, _("send failed: %s:%d: %m"), __FILE__, __LINE__);
+ syslog(LOG_ERR, _("Send failed: %s:%d: %m"), __FILE__, __LINE__);
return -1;
}
cp
int send_timeout(conn_list_t *cl)
{
cp
- if(debug_lvl > 2)
- syslog(LOG_DEBUG, _("Send TIMEOUT to " IP_ADDR_S),
- IP_ADDR_V(cl->vpn_ip));
+ if(debug_lvl > 1)
+ syslog(LOG_DEBUG, _("Sending TIMEOUT to %s (%s)"),
+ cl->vpn_hostname, cl->real_hostname);
buflen = snprintf(buffer, MAXBUFSIZE, "%d %lx\n", PINGTIMEOUT, myself->vpn_ip);
if((write(cl->meta_socket, buffer, buflen)) < 0)
{
- syslog(LOG_ERR, _("send failed: %s:%d: %m"), __FILE__, __LINE__);
+ syslog(LOG_ERR, _("Send failed: %s:%d: %m"), __FILE__, __LINE__);
return -1;
}
cp
int send_del_host(conn_list_t *cl, conn_list_t *new_host)
{
cp
- if(debug_lvl > 2)
- syslog(LOG_DEBUG, _("Sending delete host " IP_ADDR_S " to " IP_ADDR_S),
- IP_ADDR_V(new_host->vpn_ip), IP_ADDR_V(cl->vpn_ip));
+ if(debug_lvl > 1)
+ syslog(LOG_DEBUG, _("Sending DEL_HOST for %s (%s) to %s (%s)"),
+ new_host->vpn_hostname, new_host->real_hostname, cl->vpn_hostname, cl->real_hostname);
buflen = snprintf(buffer, MAXBUFSIZE, "%d %lx\n", DEL_HOST, new_host->vpn_ip);
if((write(cl->meta_socket, buffer, buflen)) < 0)
{
- syslog(LOG_ERR, _("send failed: %s:%d: %m"), __FILE__, __LINE__);
+ syslog(LOG_ERR, _("Send failed: %s:%d: %m"), __FILE__, __LINE__);
return -1;
}
cp
return 0;
}
+/* Evil hack - TCP tunneling is bad */
+int send_tcppacket(conn_list_t *cl, void *data, int len)
+{
+cp
+ if(debug_lvl > 1)
+ syslog(LOG_DEBUG, _("Sending PACKET to %s (%s)"),
+ cl->vpn_hostname, cl->real_hostname);
+
+ buflen = snprintf(buffer, MAXBUFSIZE, "%d %d\n", PACKET, len);
+
+ if((write(cl->meta_socket, buffer, buflen)) != buflen)
+ {
+ syslog(LOG_ERR, _("Send failed: %s:%d: %m"), __FILE__, __LINE__);
+ return -1;
+ }
+
+ if((write(cl->meta_socket, data, len)) != len)
+ {
+ syslog(LOG_ERR, _("Send failed: %s:%d: %m"), __FILE__, __LINE__);
+ return -1;
+ }
+
+cp
+ return 0;
+}
+
int send_ping(conn_list_t *cl)
{
cp
- if(debug_lvl > 3)
- syslog(LOG_DEBUG, _("pinging " IP_ADDR_S), IP_ADDR_V(cl->vpn_ip));
+ if(debug_lvl > 1)
+ syslog(LOG_DEBUG, _("Sending PING to %s (%s)"),
+ cl->vpn_hostname, cl->real_hostname);
buflen = snprintf(buffer, MAXBUFSIZE, "%d\n", PING);
if((write(cl->meta_socket, buffer, buflen)) < 0)
{
- syslog(LOG_ERR, _("send failed: %s:%d: %m"), __FILE__, __LINE__);
+ syslog(LOG_ERR, _("Send failed: %s:%d: %m"), __FILE__, __LINE__);
return -1;
}
cp
int send_pong(conn_list_t *cl)
{
cp
+ if(debug_lvl > 1)
+ syslog(LOG_DEBUG, _("Sending PONG to %s (%s)"),
+ cl->vpn_hostname, cl->real_hostname);
+
buflen = snprintf(buffer, MAXBUFSIZE, "%d\n", PONG);
if((write(cl->meta_socket, buffer, buflen)) < 0)
{
- syslog(LOG_ERR, _("send failed: %s:%d: %m"), __FILE__, __LINE__);
+ syslog(LOG_ERR, _("Send failed: %s:%d: %m"), __FILE__, __LINE__);
return -1;
}
cp
int send_add_host(conn_list_t *cl, conn_list_t *new_host)
{
+ ip_t real_ip;
+ int flags;
+ char *hostname;
cp
- if(debug_lvl > 2)
- syslog(LOG_DEBUG, _("Sending add host to " IP_ADDR_S),
- IP_ADDR_V(cl->vpn_ip));
+ real_ip = new_host->real_ip;
+ hostname = new_host->real_hostname;
+ flags = new_host->flags;
+
+ /* If we need to propagate information about a new host that wants us to export
+ * it's indirectdata flag, we set the INDIRECTDATA flag and unset the EXPORT...
+ * flag, and set it's real_ip to our vpn_ip, so that net.c send_packet() will
+ * work correctly.
+ */
+
+ if(flags & EXPORTINDIRECTDATA)
+ {
+ flags &= ~EXPORTINDIRECTDATA;
+ flags |= INDIRECTDATA;
+ real_ip = myself->vpn_ip;
+ hostname = myself->real_hostname;
+ }
+
+ if(debug_lvl > 1)
+ syslog(LOG_DEBUG, _("Sending ADD_HOST for %s (%s) to %s (%s)"),
+ new_host->vpn_hostname, hostname, cl->vpn_hostname, cl->real_hostname);
- buflen = snprintf(buffer, MAXBUFSIZE, "%d %lx %lx/%lx:%x\n", ADD_HOST, new_host->real_ip, new_host->vpn_ip, new_host->vpn_mask, new_host->port);
+ buflen = snprintf(buffer, MAXBUFSIZE, "%d %lx %lx/%lx:%x %d\n", ADD_HOST, real_ip, new_host->vpn_ip, new_host->vpn_mask, new_host->port, flags);
if((write(cl->meta_socket, buffer, buflen)) < 0)
{
- syslog(LOG_ERR, _("send failed: %s:%d: %m"), __FILE__, __LINE__);
+ syslog(LOG_ERR, _("Send failed: %s:%d: %m"), __FILE__, __LINE__);
return -1;
}
cp
int send_key_changed(conn_list_t *cl, conn_list_t *src)
{
cp
- if(debug_lvl > 2)
- syslog(LOG_DEBUG, _("Sending KEY_CHANGED to " IP_ADDR_S),
- IP_ADDR_V(cl->vpn_ip));
+ if(debug_lvl > 1)
+ syslog(LOG_DEBUG, _("Sending KEY_CHANGED origin %s to %s (%s)"),
+ src->vpn_hostname, cl->vpn_hostname, cl->real_hostname);
buflen = snprintf(buffer, MAXBUFSIZE, "%d %lx\n", KEY_CHANGED, src->vpn_ip);
if((write(cl->meta_socket, buffer, buflen)) < 0)
{
- syslog(LOG_ERR, _("send failed: %s:%d: %m"), __FILE__, __LINE__);
+ syslog(LOG_ERR, _("Send failed: %s:%d: %m"), __FILE__, __LINE__);
return -1;
}
cp
int send_basic_info(conn_list_t *cl)
{
cp
- if(debug_lvl > 2)
- syslog(LOG_DEBUG, _("Send BASIC_INFO to " IP_ADDR_S),
- IP_ADDR_V(cl->real_ip));
+ if(debug_lvl > 1)
+ syslog(LOG_DEBUG, _("Sending BASIC_INFO to %s"),
+ cl->real_hostname);
- buflen = snprintf(buffer, MAXBUFSIZE, "%d %d %lx/%lx:%x\n", BASIC_INFO, PROT_CURRENT, myself->vpn_ip, myself->vpn_mask, myself->port);
+ buflen = snprintf(buffer, MAXBUFSIZE, "%d %d %lx/%lx:%x %d\n", BASIC_INFO, PROT_CURRENT, myself->vpn_ip, myself->vpn_mask, myself->port, myself->flags);
if((write(cl->meta_socket, buffer, buflen)) < 0)
{
- syslog(LOG_ERR, _("send failed: %s:%d: %m"), __FILE__, __LINE__);
+ syslog(LOG_ERR, _("Send failed: %s:%d: %m"), __FILE__, __LINE__);
return -1;
}
cp
cp
encrypt_passphrase(&tmp);
- if(debug_lvl > 2)
- syslog(LOG_DEBUG, _("Send PASSPHRASE %s to " IP_ADDR_S),
- tmp.phrase, IP_ADDR_V(cl->vpn_ip));
+ if(debug_lvl > 1)
+ syslog(LOG_DEBUG, _("Sending PASSPHRASE to %s (%s)"),
+ cl->vpn_hostname, cl->real_hostname);
buflen = snprintf(buffer, MAXBUFSIZE, "%d %s\n", PASSPHRASE, tmp.phrase);
if((write(cl->meta_socket, buffer, buflen)) < 0)
{
- syslog(LOG_ERR, _("send failed: %s:%d: %m"), __FILE__, __LINE__);
+ syslog(LOG_ERR, _("Send failed: %s:%d: %m"), __FILE__, __LINE__);
return -1;
}
cp
int send_public_key(conn_list_t *cl)
{
cp
- if(debug_lvl > 2)
- syslog(LOG_DEBUG, _("Send PUBLIC_KEY %s to " IP_ADDR_S),
- my_public_key_base36, IP_ADDR_V(cl->vpn_ip));
+ if(debug_lvl > 1)
+ syslog(LOG_DEBUG, _("Sending PUBLIC_KEY to %s (%s)"),
+ cl->vpn_hostname, cl->real_hostname);
buflen = snprintf(buffer, MAXBUFSIZE, "%d %s\n", PUBLIC_KEY, my_public_key_base36);
if((write(cl->meta_socket, buffer, buflen)) < 0)
{
- syslog(LOG_ERR, _("send failed: %s:%d: %m"), __FILE__, __LINE__);
+ syslog(LOG_ERR, _("Send failed: %s:%d: %m"), __FILE__, __LINE__);
return -1;
}
cp
return 0;
}
+/* WDN doet deze functie? (GS)
int send_calculate(conn_list_t *cl, char *k)
{
cp
if((write(cl->meta_socket, buffer, buflen)) < 0)
{
- syslog(LOG_ERR, _("send failed: %s:%d: %m"), __FILE__, __LINE__);
+ syslog(LOG_ERR, _("Send failed: %s:%d: %m"), __FILE__, __LINE__);
return -1;
}
cp
return 0;
}
+*/
int send_key_request(ip_t to)
{
fw = lookup_conn(to);
if(!fw)
{
- syslog(LOG_ERR, _("Attempting to send key request to " IP_ADDR_S ", which does not exist?"),
+ syslog(LOG_ERR, _("Attempting to send REQ_KEY to %d.%d.%d.%d, which does not exist?"),
IP_ADDR_V(to));
return -1;
}
- if(debug_lvl > 2)
- syslog(LOG_DEBUG, _("Sending out request for public key to " IP_ADDR_S),
- IP_ADDR_V(fw->nexthop->vpn_ip));
+ if(debug_lvl > 1)
+ syslog(LOG_DEBUG, _("Sending REQ_KEY to %s (%s)"),
+ fw->nexthop->vpn_hostname, fw->nexthop->real_hostname);
buflen = snprintf(buffer, MAXBUFSIZE, "%d %lx %lx\n", REQ_KEY, to, myself->vpn_ip);
if((write(fw->nexthop->meta_socket, buffer, buflen)) < 0)
{
- syslog(LOG_ERR, _("send failed: %s:%d: %m"), __FILE__, __LINE__);
+ syslog(LOG_ERR, _("Send failed: %s:%d: %m"), __FILE__, __LINE__);
return -1;
}
fw->status.waitingforkey = 1;
if(!fw)
{
- syslog(LOG_ERR, _("Attempting to send key answer to " IP_ADDR_S ", which does not exist?"),
+ syslog(LOG_ERR, _("Attempting to send ANS_KEY to %d.%d.%d.%d, which does not exist?"),
IP_ADDR_V(to));
return -1;
}
- if(debug_lvl > 2)
- syslog(LOG_DEBUG, _("Sending public key to " IP_ADDR_S),
- IP_ADDR_V(fw->nexthop->vpn_ip));
+ if(debug_lvl > 1)
+ syslog(LOG_DEBUG, _("Sending ANS_KEY to %s (%s)"),
+ fw->nexthop->vpn_hostname, fw->nexthop->real_hostname);
buflen = snprintf(buffer, MAXBUFSIZE, "%d %lx %lx %d %s\n", ANS_KEY, to, myself->vpn_ip, my_key_expiry, my_public_key_base36);
if((write(fw->nexthop->meta_socket, buffer, buflen)) < 0)
{
- syslog(LOG_ERR, _("send failed: %s:%d: %m"), __FILE__, __LINE__);
+ syslog(LOG_ERR, _("Send failed: %s:%d: %m"), __FILE__, __LINE__);
return -1;
}
cp
int basic_info_h(conn_list_t *cl)
{
+ conn_list_t *old;
cp
- if(sscanf(cl->buffer, "%*d %d %lx/%lx:%hx", &cl->protocol_version, &cl->vpn_ip, &cl->vpn_mask, &cl->port) != 4)
+ if(debug_lvl > 1)
+ syslog(LOG_DEBUG, _("Got BASIC_INFO from %s"), cl->real_hostname);
+
+ if(sscanf(cl->buffer, "%*d %d %lx/%lx:%hx %d", &cl->protocol_version, &cl->vpn_ip, &cl->vpn_mask, &cl->port, &cl->flags) != 5)
{
- syslog(LOG_ERR, _("got bad BASIC_INFO request: %s"), cl->buffer);
+ syslog(LOG_ERR, _("Got bad BASIC_INFO from %s"),
+ cl->real_hostname);
return -1;
- }
+ }
+
+ cl->vpn_hostname = hostlookup(htonl(cl->vpn_ip));
if(cl->protocol_version != PROT_CURRENT)
{
- syslog(LOG_ERR, _("Peer uses incompatible protocol version %d."),
+ syslog(LOG_ERR, _("Peer uses incompatible protocol version %d"),
cl->protocol_version);
return -1;
}
- if(debug_lvl > 2)
- syslog(LOG_DEBUG, _("got BASIC_INFO(%hd," IP_ADDR_S "," IP_ADDR_S ")"), cl->port,
- IP_ADDR_V(cl->vpn_ip), IP_ADDR_V(cl->vpn_mask));
- if(debug_lvl > 1)
- syslog(LOG_DEBUG, _("Peer uses protocol version %d"),
- cl->protocol_version);
-
if(cl->status.outgoing)
{
+ /* First check if the host we connected to is already in our
+ connection list. If so, we are probably making a loop, which
+ is not desirable.
+ */
+
+ if((old=lookup_conn(cl->vpn_ip)))
+ {
+ if(debug_lvl>0)
+ syslog(LOG_NOTICE, _("Uplink %s (%s) is already in our connection list"),
+ cl->vpn_hostname, cl->real_hostname);
+ cl->status.outgoing = 0;
+ old->status.outgoing = 1;
+ terminate_connection(cl);
+ return 0;
+ }
+
if(setup_vpn_connection(cl) < 0)
return -1;
send_basic_info(cl);
}
else
{
+
if(setup_vpn_connection(cl) < 0)
return -1;
send_passphrase(cl);
if(sscanf(cl->buffer, "%*d %as", &(cl->pp->phrase)) != 1)
{
- syslog(LOG_ERR, _("got bad PASSPHRASE request: %s"), cl->buffer);
+ syslog(LOG_ERR, _("Got bad PASSPHRASE from %s (%s)"),
+ cl->vpn_hostname, cl->real_hostname);
return -1;
}
cl->pp->len = strlen(cl->pp->phrase);
- if(debug_lvl > 2)
- syslog(LOG_DEBUG, _("got PASSPHRASE"));
+ if(debug_lvl > 1)
+ syslog(LOG_DEBUG, _("Got PASSPHRASE from %s (%s)"),
+ cl->vpn_hostname, cl->real_hostname);
if(cl->status.outgoing)
send_passphrase(cl);
cp
if(sscanf(cl->buffer, "%*d %as", &g_n) != 1)
{
- syslog(LOG_ERR, _("got bad PUBLIC_KEY request: %s"), cl->buffer);
+ syslog(LOG_ERR, _("Got bad PUBLIC_KEY from %s (%s)"),
+ cl->vpn_hostname, cl->real_hostname);
return -1;
}
- if(debug_lvl > 2)
- syslog(LOG_DEBUG, _("got PUBLIC_KEY %s"), g_n);
+ if(debug_lvl > 1)
+ syslog(LOG_DEBUG, _("Got PUBLIC_KEY from %s (%s)"),
+ cl->vpn_hostname, cl->real_hostname);
if(verify_passphrase(cl, g_n))
{
/* intruder! */
- syslog(LOG_ERR, _("Intruder: passphrase does not match."));
+ syslog(LOG_ERR, _("Intruder from %s: passphrase for %s does not match!"),
+ cl->real_hostname, cl->vpn_hostname);
return -1;
}
- if(debug_lvl > 2)
- syslog(LOG_INFO, _("Passphrase OK"));
-
if(cl->status.outgoing)
send_public_key(cl);
else
/* Okay, before we active the connection, we check if there is another entry
in the connection list with the same vpn_ip. If so, it presumably is an
- old connection that has timed out but we don't know it yet. Because our
- conn_list entry is not active, lookup_conn will skip ourself. */
-
- while(old=lookup_conn(cl->vpn_ip))
- terminate_connection(old);
+ old connection that has timed out but we don't know it yet.
+ */
+ while((old = lookup_conn(cl->vpn_ip)))
+ {
+ if(debug_lvl > 1)
+ syslog(LOG_NOTICE, _("Removing old entry for %s at %s in favour of new connection from %s"),
+ cl->vpn_hostname, old->real_hostname, cl->real_hostname);
+ old->status.active = 0;
+ terminate_connection(old);
+ }
+
cl->status.active = 1;
+
+ if(debug_lvl > 0)
+ syslog(LOG_NOTICE, _("Connection with %s (%s) activated"),
+ cl->vpn_hostname, cl->real_hostname);
+
notify_others(cl, NULL, send_add_host);
notify_one(cl);
}
int ack_h(conn_list_t *cl)
{
cp
- if(debug_lvl > 2)
- syslog(LOG_DEBUG, _("got ACK"));
+ if(debug_lvl > 1)
+ syslog(LOG_DEBUG, _("Got ACK from %s (%s)"),
+ cl->vpn_hostname, cl->real_hostname);
cl->status.active = 1;
- syslog(LOG_NOTICE, _("Connection with %s activated."), cl->hostname);
+
+ if(debug_lvl > 0)
+ syslog(LOG_NOTICE, _("Connection with %s (%s) activated"),
+ cl->vpn_hostname, cl->real_hostname);
+
+ notify_others(cl, NULL, send_add_host);
+ notify_one(cl);
+
+ upstreamindex = 0;
cp
return 0;
}
int termreq_h(conn_list_t *cl)
{
cp
- syslog(LOG_NOTICE, _(IP_ADDR_S " wants to quit"), IP_ADDR_V(cl->vpn_ip));
+ if(!cl->status.active)
+ {
+ syslog(LOG_ERR, _("Got unauthorized TERMREQ from %s (%s)"),
+ cl->vpn_hostname, cl->real_hostname);
+ return -1;
+ }
+
+ if(debug_lvl > 1)
+ syslog(LOG_DEBUG, _("Got TERMREQ from %s (%s)"),
+ cl->vpn_hostname, cl->real_hostname);
+
cl->status.termreq = 1;
- terminate_connection(cl);
- notify_others(cl, NULL, send_del_host);
+ terminate_connection(cl);
cp
return 0;
}
int timeout_h(conn_list_t *cl)
{
cp
- if(!cl->status.active) return -1;
- syslog(LOG_NOTICE, _(IP_ADDR_S " says it's gotten a timeout from us"), IP_ADDR_V(cl->vpn_ip));
+ if(!cl->status.active)
+ {
+ syslog(LOG_ERR, _("Got unauthorized TIMEOUT from %s (%s)"),
+ cl->vpn_hostname, cl->real_hostname);
+ return -1;
+ }
+
+ if(debug_lvl > 1)
+ syslog(LOG_DEBUG, _("Got TIMEOUT from %s (%s)"),
+ cl->vpn_hostname, cl->real_hostname);
+
cl->status.termreq = 1;
terminate_connection(cl);
cp
ip_t vpn_ip;
conn_list_t *fw;
cp
- if(!cl->status.active) return -1;
+ if(!cl->status.active)
+ {
+ syslog(LOG_ERR, _("Got unauthorized DEL_HOST from %s (%s)"),
+ cl->vpn_hostname, cl->real_hostname);
+ return -1;
+ }
if(sscanf(cl->buffer, "%*d %lx", &vpn_ip) != 1)
{
- syslog(LOG_ERR, _("got bad DEL_HOST request: %s"), cl->buffer);
+ syslog(LOG_ERR, _("Got bad DEL_HOST from %s (%s)"),
+ cl->vpn_hostname, cl->real_hostname);
return -1;
}
- if(debug_lvl > 2)
- syslog(LOG_DEBUG, _("got DEL_HOST for " IP_ADDR_S),
- IP_ADDR_V(vpn_ip));
-
if(!(fw = lookup_conn(vpn_ip)))
{
- syslog(LOG_ERR, _("Somebody wanted to delete " IP_ADDR_S " which does not exist?"),
- IP_ADDR_V(vpn_ip));
+ syslog(LOG_ERR, _("Got DEL_HOST for %d.%d.%d.%d from %s (%s) which does not exist?"),
+ IP_ADDR_V(vpn_ip), cl->vpn_hostname, cl->real_hostname);
return 0;
}
- notify_others(cl, fw, send_del_host);
+ /* Connections lists are really messed up if this happens */
+ if(vpn_ip == myself->vpn_ip)
+ {
+ syslog(LOG_ERR, _("Warning: got DEL_HOST from %s (%s) for ourself, restarting"),
+ cl->vpn_hostname, cl->real_hostname);
+ sighup = 1;
+ return 0;
+ }
+
+ if(debug_lvl > 1)
+ syslog(LOG_DEBUG, _("Got DEL_HOST for %s (%s) from %s (%s)"),
+ fw->vpn_hostname, fw->real_hostname, cl->vpn_hostname, cl->real_hostname);
+
+ notify_others(fw, cl, send_del_host);
fw->status.termreq = 1;
+ fw->status.active = 0;
+
terminate_connection(fw);
cp
return 0;
}
-int ping_h(conn_list_t *cl)
+int tcppacket_h(conn_list_t *cl)
{
+ real_packet_t rp;
+ int len, count = 0, result;
+ conn_list_t *f;
cp
- if(!cl->status.active) return -1;
+ if(!cl->status.active)
+ {
+ syslog(LOG_ERR, _("Got unauthorized PACKET from %s (%s)"),
+ cl->vpn_hostname, cl->real_hostname);
+ return -1;
+ }
+
+ if(sscanf(cl->buffer, "%*d %d", &len) != 1)
+ {
+ syslog(LOG_ERR, _("Got bad PACKET from %s (%s)"),
+ cl->vpn_hostname, cl->real_hostname);
+ return -1;
+ }
+
+ if(len>1600)
+ {
+ syslog(LOG_ERR, _("Got too big PACKET from %s (%s)"),
+ cl->vpn_hostname, cl->real_hostname);
+ return -1;
+ }
+
+ /* Evil kludge comming up */
+ while(len)
+ {
+ syslog(LOG_DEBUG, _("Direct read count=%d len=%d rp=%p socket=%d"), count, len, ((char *)&rp)+count, cl->meta_socket);
+ result=read(cl->meta_socket,((char *)&rp)+count,len);
+ if(result<0)
+ {
+ syslog(LOG_ERR, _("Error while receiving PACKET data from %s (%s): %m"),
+ cl->vpn_hostname, cl->real_hostname);
+ return -1;
+ }
+ count+=result;
+ len-=result;
+ }
+
if(debug_lvl > 3)
- syslog(LOG_DEBUG, _("responding to ping from " IP_ADDR_S), IP_ADDR_V(cl->vpn_ip));
+ syslog(LOG_DEBUG, _("Got PACKET length %d from %s (%s)"), len,
+ cl->vpn_hostname, cl->real_hostname);
+
+ total_socket_in += len;
+
+ rp.data.len = ntohs(rp.data.len);
+ rp.len = ntohs(rp.len);
+ rp.from = ntohl(rp.from);
+
+ if(rp.len >= 0)
+ {
+ f = lookup_conn(rp.from);
+ 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));
+ return -1;
+ }
+
+ if(f->status.validkey)
+ xrecv(f, &rp);
+ else
+ {
+ add_queue(&(f->rq), &rp, rp.len);
+ if(!cl->status.waitingforkey)
+ send_key_request(rp.from);
+ }
+
+ if(my_key_expiry <= time(NULL))
+ regenerate_keys();
+ }
+cp
+ return 0;
+}
+
+
+int ping_h(conn_list_t *cl)
+{
+cp
+ if(!cl->status.active)
+ {
+ syslog(LOG_ERR, _("Got unauthorized PING from %s (%s)"),
+ cl->vpn_hostname, cl->real_hostname);
+ return -1;
+ }
+
+ if(debug_lvl > 1)
+ syslog(LOG_DEBUG, _("Got PING from %s (%s)"),
+ cl->vpn_hostname, cl->real_hostname);
+
cl->status.pinged = 0;
cl->status.got_pong = 1;
int pong_h(conn_list_t *cl)
{
cp
- if(!cl->status.active) return -1;
- if(debug_lvl > 3)
- syslog(LOG_DEBUG, _("ok, got pong from " IP_ADDR_S), IP_ADDR_V(cl->vpn_ip));
+ if(!cl->status.active)
+ {
+ syslog(LOG_ERR, _("Got unauthorized PONG from %s (%s)"),
+ cl->vpn_hostname, cl->real_hostname);
+ return -1;
+ }
+
+ if(debug_lvl > 1)
+ syslog(LOG_DEBUG, _("Got PONG from %s (%s)"),
+ cl->vpn_hostname, cl->real_hostname);
+
cl->status.got_pong = 1;
cp
return 0;
ip_t vpn_ip;
ip_t vpn_mask;
unsigned short port;
- conn_list_t *ncn, *fw;
+ int flags;
+ conn_list_t *ncn, *old;
cp
- if(!cl->status.active) return -1;
- if(sscanf(cl->buffer, "%*d %lx %lx/%lx:%hx", &real_ip, &vpn_ip, &vpn_mask, &port) != 4)
+ if(!cl->status.active)
{
- syslog(LOG_ERR, _("got bad ADD_HOST request: %s"), cl->buffer);
+ syslog(LOG_ERR, _("Got unauthorized ADD_HOST from %s (%s)"),
+ cl->vpn_hostname, cl->real_hostname);
+ return -1;
+ }
+
+ if(sscanf(cl->buffer, "%*d %lx %lx/%lx:%hx %d", &real_ip, &vpn_ip, &vpn_mask, &port, &flags) != 5)
+ {
+ syslog(LOG_ERR, _("Got bad ADD_HOST from %s (%s)"),
+ cl->vpn_hostname, cl->real_hostname);
return -1;
}
- if(debug_lvl > 2)
- syslog(LOG_DEBUG, _("Add host request from " IP_ADDR_S), IP_ADDR_V(cl->vpn_ip));
- if(debug_lvl > 3)
- syslog(LOG_DEBUG, _("got ADD_HOST(" IP_ADDR_S "," IP_ADDR_S ",%hd)"),
- IP_ADDR_V(vpn_ip), IP_ADDR_V(vpn_mask), port);
-
- /*
- Suggestion of Hans Bayle
- */
- if((fw = lookup_conn(vpn_ip)))
+ if((old = lookup_conn(vpn_ip)))
+ {
+ if((real_ip==old->real_ip) && (vpn_mask==old->vpn_mask) && (port==old->port))
+ {
+ if(debug_lvl>1)
+ syslog(LOG_NOTICE, _("Got duplicate ADD_HOST for %s (%s) from %s (%s)"),
+ old->vpn_hostname, old->real_hostname, cl->vpn_hostname, cl->real_hostname);
+ goto skip_add_host; /* One goto a day keeps the deeply nested if constructions away. */
+ }
+ else
+ {
+ if(debug_lvl>1)
+ syslog(LOG_NOTICE, _("Removing old entry for %s (%s)"),
+ old->vpn_hostname, old->real_hostname);
+ old->status.active = 0;
+ terminate_connection(old);
+ }
+ }
+
+ /* Connections lists are really messed up if this happens */
+ if(vpn_ip == myself->vpn_ip)
{
- notify_others(fw, cl, send_add_host);
+ syslog(LOG_ERR, _("Warning: got ADD_HOST from %s (%s) for ourself, restarting"),
+ cl->vpn_hostname, cl->real_hostname);
+ sighup = 1;
return 0;
}
-
+
ncn = new_conn_list();
ncn->real_ip = real_ip;
+ ncn->real_hostname = hostlookup(htonl(real_ip));
ncn->vpn_ip = vpn_ip;
ncn->vpn_mask = vpn_mask;
+ ncn->vpn_hostname = hostlookup(htonl(vpn_ip));
ncn->port = port;
- ncn->hostname = hostlookup(real_ip);
+ ncn->flags = flags;
ncn->nexthop = cl;
ncn->next = conn_list;
conn_list = ncn;
ncn->status.active = 1;
+
+ if(debug_lvl > 1)
+ syslog(LOG_DEBUG, _("Got ADD_HOST for %s (%s) from %s (%s)"),
+ ncn->vpn_hostname, ncn->real_hostname, cl->vpn_hostname, cl->real_hostname);
+
notify_others(ncn, cl, send_add_host);
+
+skip_add_host:
cp
return 0;
}
ip_t from;
conn_list_t *fw;
cp
- if(!cl->status.active) return -1;
+ if(!cl->status.active)
+ {
+ syslog(LOG_ERR, _("Got unauthorized REQ_KEY from %s (%s)"),
+ cl->vpn_hostname, cl->real_hostname);
+ return -1;
+ }
+
if(sscanf(cl->buffer, "%*d %lx %lx", &to, &from) != 2)
{
- syslog(LOG_ERR, _("got bad request: %s"), cl->buffer);
+ syslog(LOG_ERR, _("Got bad REQ_KEY from %s (%s)"),
+ cl->vpn_hostname, cl->real_hostname);
return -1;
}
- if(debug_lvl > 2)
- syslog(LOG_DEBUG, _("got REQ_KEY from " IP_ADDR_S " for " IP_ADDR_S),
- IP_ADDR_V(from), IP_ADDR_V(to));
+ if(debug_lvl > 1)
+ syslog(LOG_DEBUG, _("Got REQ_KEY origin %d.%d.%d.%d destination %d.%d.%d.%d from %s (%s)"),
+ IP_ADDR_V(from), IP_ADDR_V(to), cl->vpn_hostname, cl->real_hostname);
if((to & myself->vpn_mask) == (myself->vpn_ip & myself->vpn_mask))
{ /* hey! they want something from ME! :) */
if(!fw)
{
- syslog(LOG_ERR, _("Attempting to forward key request to " IP_ADDR_S ", which does not exist?"),
+ syslog(LOG_ERR, _("Attempting to forward REQ_KEY to %d.%d.%d.%d, which does not exist?"),
IP_ADDR_V(to));
return -1;
}
- if(debug_lvl > 3)
- syslog(LOG_DEBUG, _("Forwarding request for public key to " IP_ADDR_S),
- IP_ADDR_V(fw->nexthop->vpn_ip));
+ if(debug_lvl > 1)
+ syslog(LOG_DEBUG, _("Forwarding REQ_KEY to %s (%s)"),
+ fw->nexthop->vpn_hostname, fw->nexthop->real_hostname);
cl->buffer[cl->reqlen-1] = '\n';
if(write(fw->nexthop->meta_socket, cl->buffer, cl->reqlen) < 0)
{
- syslog(LOG_ERR, _("send failed: %s:%d: %m"), __FILE__, __LINE__);
+ syslog(LOG_ERR, _("Send failed: %s:%d: %m"), __FILE__, __LINE__);
return -1;
}
cp
char *key;
conn_list_t *fw, *gk;
cp
- if(!cl->status.active) return -1;
+ if(!cl->status.active)
+ {
+ syslog(LOG_ERR, _("Got unauthorized ANS_KEY from %s (%s)"),
+ cl->vpn_hostname, cl->real_hostname);
+ return -1;
+ }
+
if(sscanf(cl->buffer, "%*d %lx %lx %d %as", &to, &from, &expiry, &key) != 4)
{
- syslog(LOG_ERR, _("got bad ANS_KEY request: %s"), cl->buffer);
+ syslog(LOG_ERR, _("Got bad ANS_KEY from %s (%s)"),
+ cl->vpn_hostname, cl->real_hostname);
return -1;
}
- if(debug_lvl > 3)
- syslog(LOG_DEBUG, _("got ANS_KEY from " IP_ADDR_S " for " IP_ADDR_S),
- IP_ADDR_V(from), IP_ADDR_V(to));
+ if(debug_lvl > 1)
+ syslog(LOG_DEBUG, _("Got ANS_KEY origin %d.%d.%d.%d destination %d.%d.%d.%d from %s (%s)"),
+ IP_ADDR_V(from), IP_ADDR_V(to), cl->vpn_hostname, cl->real_hostname);
if(to == myself->vpn_ip)
{ /* hey! that key's for ME! :) */
- if(debug_lvl > 2)
- syslog(LOG_DEBUG, _("Yeah! key arrived. Now do something with it."));
gk = lookup_conn(from);
if(!gk)
{
- syslog(LOG_ERR, _("Receiving key from " IP_ADDR_S ", which does not exist?"),
- IP_ADDR_V(from));
+ syslog(LOG_ERR, _("Receiving ANS_KEY origin %d.%d.%d.%d from %s (%s), which does not exist?"),
+ IP_ADDR_V(from), cl->vpn_hostname, cl->real_hostname);
return -1;
}
if(!fw)
{
- syslog(LOG_ERR, _("Attempting to forward key to " IP_ADDR_S ", which does not exist?"),
+ syslog(LOG_ERR, _("Attempting to forward ANS_KEY to %d.%d.%d.%d, which does not exist?"),
IP_ADDR_V(to));
return -1;
}
- if(debug_lvl > 2)
- syslog(LOG_DEBUG, _("Forwarding public key to " IP_ADDR_S),
- IP_ADDR_V(fw->nexthop->vpn_ip));
+ if(debug_lvl > 1)
+ syslog(LOG_DEBUG, _("Forwarding ANS_KEY to %s (%s)"),
+ fw->nexthop->vpn_hostname, fw->nexthop->real_hostname);
cl->buffer[cl->reqlen-1] = '\n';
if((write(fw->nexthop->meta_socket, cl->buffer, cl->reqlen)) < 0)
{
- syslog(LOG_ERR, _("send failed: %s:%d: %m"), __FILE__, __LINE__);
+ syslog(LOG_ERR, _("Send failed: %s:%d: %m"), __FILE__, __LINE__);
return -1;
}
cp
ip_t from;
conn_list_t *ik;
cp
- if(!cl->status.active) return -1;
+ if(!cl->status.active)
+ {
+ syslog(LOG_ERR, _("Got unauthorized KEY_CHANGED from %s (%s)"),
+ cl->vpn_hostname, cl->real_hostname);
+ return -1;
+ }
+
if(sscanf(cl->buffer, "%*d %lx", &from) != 1)
{
- syslog(LOG_ERR, _("got bad ANS_KEY request: %s"), cl->buffer);
+ syslog(LOG_ERR, _("Got bad KEY_CHANGED from %s (%s)"),
+ cl->vpn_hostname, cl->real_hostname);
return -1;
}
- if(debug_lvl > 2)
- syslog(LOG_DEBUG, _("got KEY_CHANGED from " IP_ADDR_S),
- IP_ADDR_V(from));
-
ik = lookup_conn(from);
if(!ik)
{
- syslog(LOG_ERR, _("Got changed key from " IP_ADDR_S ", which does not exist?"),
- IP_ADDR_V(from));
+ syslog(LOG_ERR, _("Got KEY_CHANGED origin %d.%d.%d.%d from %s (%s), which does not exist?"),
+ IP_ADDR_V(from), cl->vpn_hostname, cl->real_hostname);
return -1;
}
+ if(debug_lvl > 1)
+ syslog(LOG_DEBUG, _("Got KEY_CHANGED origin %s from %s (%s)"),
+ ik->vpn_hostname, cl->vpn_hostname, cl->real_hostname);
+
ik->status.validkey = 0;
ik->status.waitingforkey = 0;
- if(debug_lvl > 3)
- syslog(LOG_DEBUG, _("Forwarding key invalidation request"));
-
- notify_others(cl, ik, send_key_changed);
+ notify_others(ik, cl, send_key_changed);
cp
return 0;
}
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ tcppacket_h, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
req_key_h, ans_key_h, key_changed_h, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0
};
projects / tinc / blobdiff