along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- $Id: protocol.c,v 1.28.4.26 2000/09/10 16:15:35 guus Exp $
+ $Id: protocol.c,v 1.28.4.27 2000/09/10 22:49:46 guus Exp $
*/
#include "config.h"
int send_id(conn_list_t *cl)
{
cp
- return send_request(cl, "%d %s %d-%d %s", ID, myself->id, myself->min_version, myself->max_version, opt2str(myself->options));
+ return send_request(cl, "%d %s %d %s", ID, myself->id, myself->version, opt2str(myself->options));
}
int id_h(conn_list_t *cl)
conn_list_t *old;
char *options;
cp
- if(sscanf(cl->buffer, "%*d %as %d-%d %as", &cl->id, &cl->min_version, &cl->max_version, &options) != 4)
+ if(sscanf(cl->buffer, "%*d %as %d %as", &cl->id, &cl->version, &options) != 3)
{
syslog(LOG_ERR, _("Got bad ID from %s"), cl->hostname);
return -1;
}
- /* Check if version ranges overlap */
+ /* Check if version matches */
- if((cl->min_version > myself->max_version) || (cl->max_version < myself_min_version) || (cl->min_version > cl->max_version))
+ if(cl->version != myself->version)
{
- syslog(LOG_ERR, _("Peer %s uses incompatible version (%d-%d)"), cl->hostname, cl->min_version, cl->max_version);
+ syslog(LOG_ERR, _("Peer %s uses incompatible version %d"), cl->hostname, cl->min_version, cl->max_version);
return -1;
}
/* Check if option string is valid */
- if(str2opt(options) == -1)
+ if((cl->options = str2opt(options)) == -1)
{
syslog(LOG_ERR, _("Peer %s uses invalid option string"), cl->hostname);
return -1;
int send_add_subnet(conn_list_t *cl, conn_list_t *other, subnet_t *subnet)
{
cp
- return send_meta(cl, "%d %s %d %s", ADD_SUBNET, other->id, subnet->type, net2str(subnet));
+ return send_request(cl, "%d %s %d %s", ADD_SUBNET, other->id, subnet->type, net2str(subnet));
}
int add_subnet_h(conn_list_t *cl)
int send_del_subnet(conn_list_t *cl, conn_list_t *other, subnet_t *subnet)
{
cp
- return send_meta(cl, "%d %s %d %s", DEL_SUBNET, other->id, subnet->type, net2str(subnet));
+ return send_request(cl, "%d %s %d %s", DEL_SUBNET, other->id, subnet->type, net2str(subnet));
}
int del_subnet_h(conn_list_t *cl)
int send_add_host(conn_list_t *cl, conn_list_t *other)
{
cp
- return send_meta(cl, "%d %lx:%d", ADD_HOST, other->id, other->address, other->port);
+ return send_request(cl, "%d %s %lx:%d %s", ADD_HOST, other->id, other->address, other->port, opt2str(other->options));
}
int add_host_h(conn_list_t *cl)
{
+ char *options;
+ conn_list_t *old, *new;
+cp
+ new = new_conn_list();
+
+ if(sscanf(cl->buffer, "%*d %as %lx:%d %as", &new->id, &new->address, &new->port, &options) != 4)
+ {
+ syslog(LOG_ERR, _("Got bad ADD_HOST from %s (%s)"), cl->id, cl->hostname);
+ return -1;
+ }
+
+ /* Check if option string is valid */
+
+ if((new->options = str2opt(options) == -1)
+ {
+ syslog(LOG_ERR, _("Got bad ADD_HOST from %s (%s): invalid option string"), cl->hostname);
+ return -1;
+ }
+
+ /* Check if identity is a valid name */
+
+ if(!check_id(new->id))
+ {
+ syslog(LOG_ERR, _("Got bad ADD_HOST from %s (%s): invalid identity name"), cl->id, cl->hostname);
+ return -1;
+ }
+
+ /* Check if somebody tries to add ourself */
+
+ if(!strcmp(new->id, myself->id))
+ {
+ syslog(LOG_ERR, _("Warning: got ADD_HOST from %s (%s) for ourself, restarting"), cl->id, cl->hostname);
+ sighup = 1;
+ return 0;
+ }
+
+ /* Fill in more of the new conn_list structure */
+
+ new->hostname = hostlookup(htonl(new->address));
+
+ /* Check if the new host already exists in the connnection list */
+
+ if((old = lookup_id(id))
+ {
+ if((new->address == old->address) && (new->port == old->port))
+ {
+ if(debug_lvl > DEBUG_CONNECTIONS)
+ syslog(LOG_NOTICE, _("Got duplicate ADD_HOST for %s (%s) from %s (%s)"), old->id, old->hostname, new->id, new->hostname);
+ return 0;
+ }
+ else
+ {
+ if(debug_lvl > DEBUG_CONNECTIONS)
+ syslog(LOG_NOTICE, _("Removing old entry for %s (%s)"), old->id, old->hostname);
+ old->status.active = 0;
+ terminate_connection(old);
+ }
+ }
+
+ /* Fill in rest of conn_list structure */
+
+ new->nexthop = cl;
+ new->status.active = 1;
+
+ /* Hook it up into the conn_list */
+
+ conn_list_add(conn_list, new);
+
+ /* Tell the rest about the new host */
+
+ notify_others(new, cl, send_add_host);
+
+cp
+ return 0;
}
int send_del_host(conn_list_t *cl, conn_list_t *other)
{
cp
- return send_meta(cl, "%d %lx:%d", DEL_HOST, other->id, other->address, other->port);
+ return send_request(cl, "%d %s %lx:%d", DEL_HOST, other->id, other->address, other->port);
}
int del_host_h(conn_list_t *cl)
{
+ char *id;
+ ip_t address;
+ port_t port;
+ conn_list_t *old;
+cp
+ if(sscanf(cl->buffer, "%*d %as %lx:%d", &id, &address, &port) != 3)
+ {
+ syslog(LOG_ERR, _("Got bad DEL_HOST from %s (%s)"), cl->id, cl->hostname);
+ return -1;
+ }
+
+ /* Check if somebody tries to delete ourself */
+
+ if(!strcmp(id, myself->id))
+ {
+ syslog(LOG_ERR, _("Warning: got DEL_HOST from %s (%s) for ourself, restarting"), cl->id, cl->hostname);
+ sighup = 1;
+ return 0;
+ }
+
+ /* Check if the new host already exists in the connnection list */
+
+ if((old = lookup_id(id))
+ {
+ if((address == old->address) && (port == old->port))
+ {
+ notify_others(old, cl, send_del_host);
+
+ fw->status.termreq = 1;
+ fw->status.active = 0;
+
+ terminate_connection(fw);
+cp
+ return 0;
+ }
+ }
+
+ if(debug_lvl > DEBUG_CONNECTIONS)
+ {
+ syslog(LOG_NOTICE, _("Got DEL_HOST for %s from %s (%s) which is not in our connection list"), id, cl->id, cl->hostname);
+ }
+cp
+ return 0;
}
/* Status and error notification routines */
syslog(LOG_NOTICE, _("Error message from %s (%s): %s: %s"), cl->id, cl->hostname, error_text[errno], errorstring);
}
-cp
free(errorstring);
+ cl->status.termreq = 1;
+ terminate_connection(cl);
+cp
return 0;
}
int send_termreq(conn_list_t *cl)
{
+cp
+ return send_request(cl, "%d", TERMREQ);
}
int termreq_h(conn_list_t *cl)
{
+cp
+ cl->status.termreq = 1;
+ terminate_connection(cl);
+cp
+ return 0;
}
-/* Keepalive routines */
+/* Keepalive routines - FIXME: needs a closer look */
int send_ping(conn_list_t *cl)
{
+ cl->status.pinged = 1;
cp
- return send_meta(cl, "%d", PING);
+ return send_request(cl, "%d", PING);
}
int ping_h(conn_list_t *cl)
{
+cp
+ return send_pong(cl);
}
int send_pong(conn_list_t *cl)
{
cp
- return send_meta(cl, "%d", PONG);
+ return send_request(cl, "%d", PONG);
}
int pong_h(conn_list_t *cl)
{
-}
-
-/* Key exchange */
-
-int send_req_key(conn_list_t *cl, conn_list_t *source)
-{
cp
- return send_meta(cl, "%d %s", REQ_KEY, source->id);
-}
-
-int req_key_h(conn_list_t *cl)
-{
-}
-
-int send_key(conn_list_t *cl)
-{
-}
-
-int key_h(conn_list_t *cl)
-{
+ cl->status.got_pong = 1;
+cp
+ return 0;
}
+/* Key exchange */
-
-
-/* Old routines */
-
-
-int send_termreq(conn_list_t *cl)
+int send_key_changed(conn_list_t *from, conn_list_t *cl)
{
+ conn_list_t *p;
cp
- 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)
+ for(p = conn_list; p != NULL; p = p->next)
{
- if(debug_lvl > 1)
- syslog(LOG_ERR, _("Send failed: %s:%d: %m"), __FILE__, __LINE__);
- return -1;
+ if(p!=cl && p->status.meta && p->status.active)
+ send_request(p, "%d %s", KEY_CHANGED, from->id);
}
cp
return 0;
}
-int send_timeout(conn_list_t *cl)
+int key_changed_h(conn_list_t *cl)
{
+ char *from_id;
+ conn_list_t *from;
cp
- 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(sscanf(cl->buffer, "%*d %as", &from_id) != 1)
+ {
+ syslog(LOG_ERR, _("Got bad KEY_CHANGED from %s (%s)"), cl->id, cl->hostname);
+ return -1;
+ }
- if((write(cl->meta_socket, buffer, buflen)) < 0)
+ if(!(from = lookup_id(from_id)))
{
- syslog(LOG_ERR, _("Send failed: %s:%d: %m"), __FILE__, __LINE__);
+ syslog(LOG_ERR, _("Got KEY_CHANGED from %s (%s) origin %s which does not exist in our connection list"), cl->id, cl->hostname, from_id);
+ free(from);
return -1;
}
+
+ from->status.validkey = 0;
+ from->status.waitingforkey = 0;
+
+ send_key_changed(from, cl);
cp
return 0;
}
-
-int send_del_host(conn_list_t *cl, conn_list_t *new_host)
+
+int send_req_key(conn_list_t *from, conn_list_t *to)
{
cp
- 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__);
- return -1;
- }
-cp
- return 0;
+ return send_request(to->nexthop, "%d %s %s", REQ_KEY, from->id, to->id);
}
-int send_tcppacket(conn_list_t *cl, void *data, int len)
+int req_key_h(conn_list_t *cl)
{
+ char *from_id, *to_id;
+ conn_list_t *from, *to;
cp
- if(debug_lvl > 3)
- 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)) < 0)
+ if(sscanf(cl->buffer, "%*d %as %as", &from_id, &to_id) != 2)
{
- syslog(LOG_ERR, _("Send failed: %s:%d: %m"), __FILE__, __LINE__);
- return -1;
- }
-
- if((write(cl->meta_socket, data, len)) < 0)
+ syslog(LOG_ERR, _("Got bad REQ_KEY from %s (%s)"), cl->id, cl->hostname);
+ return -1;
+ }
+
+ if(!(from = lookup_id(from_id)))
{
- syslog(LOG_ERR, _("Send failed: %s:%d: %m"), __FILE__, __LINE__);
+ syslog(LOG_ERR, _("Got REQ_KEY from %s (%s) origin %s which does not exist in our connection list"), cl->id, cl->hostname, from_id);
+ free(from); free(to);
return -1;
}
-cp
- return 0;
-}
-
-int send_ping(conn_list_t *cl)
-{
-cp
- 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);
+ /* Check if this key request is for us */
- if((write(cl->meta_socket, buffer, buflen)) < 0)
+ if(!strcmp(id, myself->strcmp))
{
- syslog(LOG_ERR, _("Send failed: %s:%d: %m"), __FILE__, __LINE__);
- return -1;
+ send_ans_key(myself, from, myself->datakey);
}
+ else
+ {
+ if(!(to = lookup_id(to_id)))
+ {
+ syslog(LOG_ERR, _("Got REQ_KEY from %s (%s) destination %s which does not exist in our connection list"), cl->id, cl->hostname, to_id);
+ free(from); free(to);
+ return -1;
+ }
+ send_req_key(from, to);
+ }
+
+ free(from); free(to);
cp
return 0;
}
-int send_pong(conn_list_t *cl)
+int send_ans_key(conn_list_t *from, conn_list_t *to, char *datakey)
{
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__);
- return -1;
- }
-cp
- return 0;
+ return send_request(to->nexthop, "%d %s %s %s", ANS_KEY, from->id, to->id, datakey);
}
-int send_add_host(conn_list_t *cl, conn_list_t *new_host)
+int ans_key_h(conn_list_t *cl)
{
- ip_t real_ip;
- int flags;
- char *hostname;
+ char *from_id, *to_id, *datakey;
+ conn_list_t *from, *to;
cp
- 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)
+ if(sscanf(cl->buffer, "%*d %as %as %as", &from_id, &to_id, &datakey) != 3)
{
- 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 %d\n", ADD_HOST, real_ip, new_host->vpn_ip, new_host->vpn_mask, new_host->port, flags);
+ syslog(LOG_ERR, _("Got bad ANS_KEY from %s (%s)"), cl->id, cl->hostname);
+ return -1;
+ }
- if((write(cl->meta_socket, buffer, buflen)) < 0)
+ if(!(from = lookup_id(from_id)))
{
- syslog(LOG_ERR, _("Send failed: %s:%d: %m"), __FILE__, __LINE__);
+ syslog(LOG_ERR, _("Got ANS_KEY from %s (%s) origin %s which does not exist in our connection list"), cl->id, cl->hostname, from_id);
+ free(from); free(to); free(datakey);
return -1;
}
-cp
- return 0;
-}
-int send_key_changed(conn_list_t *cl, conn_list_t *src)
-{
-cp
- 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);
+ /* Check if this key request is for us */
- if((write(cl->meta_socket, buffer, buflen)) < 0)
+ if(!strcmp(id, myself->strcmp))
{
- syslog(LOG_ERR, _("Send failed: %s:%d: %m"), __FILE__, __LINE__);
- return -1;
+ send_ans_key(myself, from);
+ }
+ else
+ {
+ if(!(to = lookup_id(to_id)))
+ {
+ syslog(LOG_ERR, _("Got ANS_KEY from %s (%s) destination %s which does not exist in our connection list"), cl->id, cl->hostname, to_id);
+ free(from); free(to); free(datakey);
+ return -1;
+ }
+ send_ans_key(from, to, datakey);
}
+
+ free(from); free(to); free(datakey);
cp
return 0;
}
-void send_key_changed_all(void)
-{
- conn_list_t *p;
-cp
- for(p = conn_list; p != NULL; p = p->next)
- if(p->status.meta && p->status.active)
- send_key_changed(p, myself);
-cp
-}
-int send_key_request(ip_t to)
-{
- conn_list_t *fw;
-cp
- fw = lookup_conn(to);
- if(!fw)
- {
- 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 > 1)
- syslog(LOG_DEBUG, _("Sending REQ_KEY to %s (%s)"),
- fw->nexthop->vpn_hostname, fw->nexthop->real_hostname);
+/* Old routines */
- 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__);
- return -1;
- }
- fw->status.waitingforkey = 1;
-cp
- return 0;
-}
-int send_key_answer(conn_list_t *cl, ip_t to)
+
+int send_tcppacket(conn_list_t *cl, void *data, int len)
{
- conn_list_t *fw;
cp
+ if(debug_lvl > 3)
+ syslog(LOG_DEBUG, _("Sending PACKET to %s (%s)"),
+ cl->vpn_hostname, cl->real_hostname);
- fw = lookup_conn(to);
-
- if(!fw)
+ buflen = snprintf(buffer, MAXBUFSIZE, "%d %d\n", PACKET, len);
+
+ if((write(cl->meta_socket, buffer, buflen)) < 0)
{
- syslog(LOG_ERR, _("Attempting to send ANS_KEY to %d.%d.%d.%d, which does not exist?"),
- IP_ADDR_V(to));
+ syslog(LOG_ERR, _("Send failed: %s:%d: %m"), __FILE__, __LINE__);
return -1;
}
-
- 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)
+
+ if((write(cl->meta_socket, data, len)) < 0)
{
syslog(LOG_ERR, _("Send failed: %s:%d: %m"), __FILE__, __LINE__);
return -1;
}
/*
- notify all my direct connections of a new host
+ Notify all my direct connections of a new host
that was added to the vpn, with the exception
of the source of the announcement.
*/
+
int notify_others(conn_list_t *new, conn_list_t *source,
int (*function)(conn_list_t*, conn_list_t*))
{
}
/*
- notify one connection of everything
- i have connected
+ Notify one connection of everything
+ I have connected
*/
+
int notify_one(conn_list_t *new)
{
conn_list_t *p;
The incoming request handlers
*/
-
-int termreq_h(conn_list_t *cl)
-{
-cp
- 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);
-cp
- return 0;
-}
-
-int timeout_h(conn_list_t *cl)
-{
-cp
- 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
- return 0;
-}
-
-int del_host_h(conn_list_t *cl)
-{
- ip_t vpn_ip;
- conn_list_t *fw;
-cp
- 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 from %s (%s)"),
- cl->vpn_hostname, cl->real_hostname);
- return -1;
- }
-
- if(!(fw = lookup_conn(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;
- }
-
- /* 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 tcppacket_h(conn_list_t *cl)
{
int len;
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;
-
- send_pong(cl);
-cp
- return 0;
-}
-
-int pong_h(conn_list_t *cl)
-{
-cp
- 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;
-}
-
-int add_host_h(conn_list_t *cl)
-{
- ip_t real_ip;
- ip_t vpn_ip;
- ip_t vpn_mask;
- unsigned short port;
- int flags;
- conn_list_t *ncn, *old;
-cp
- if(!cl->status.active)
- {
- 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((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)
- {
- 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->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;
-}
-
-int req_key_h(conn_list_t *cl)
-{
- ip_t to;
- ip_t from;
- conn_list_t *fw;
-cp
- 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 REQ_KEY from %s (%s)"),
- cl->vpn_hostname, cl->real_hostname);
- return -1;
- }
-
- 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! :) */
- send_key_answer(cl, from);
- return 0;
- }
-
- fw = lookup_conn(to);
-
- if(!fw)
- {
- 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 > 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__);
- return -1;
- }
-cp
- return 0;
-}
-
void set_keys(conn_list_t *cl, int expiry, char *key)
{
char *ek;
cp
}
-int ans_key_h(conn_list_t *cl)
-{
- ip_t to;
- ip_t from;
- int expiry;
- char *key;
- conn_list_t *fw, *gk;
-cp
- 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 from %s (%s)"),
- cl->vpn_hostname, cl->real_hostname);
- return -1;
- }
-
- 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! :) */
- gk = lookup_conn(from);
-
- if(!gk)
- {
- 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;
- }
-
- set_keys(gk, expiry, key);
- gk->status.validkey = 1;
- gk->status.waitingforkey = 0;
- flush_queues(gk);
- return 0;
- }
-
- fw = lookup_conn(to);
-
- if(!fw)
- {
- 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 > 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__);
- return -1;
- }
-cp
- return 0;
-}
int key_changed_h(conn_list_t *cl)
{
int (*request_handlers[])(conn_list_t*) = {
id_h, challenge_h, chal_reply_h, ack_h,
status_h, error_h, termreq_h,
- add_host_h, del_host_h,
ping_h, pong_h,
+ add_host_h, del_host_h,
+ add_subnet_h, del_subnet_h,
+ key_changed_h, req_key_h, ans_key_h,
};
char (*request_name[]) = {
"ID", "CHALLENGE", "CHAL_REPLY", "ACK",
"STATUS", "ERROR", "TERMREQ",
- "ADD_HOST", "DEL_HOST",
"PING", "PONG",
+ "ADD_HOST", "DEL_HOST",
+ "ADD_SUBNET", "DEL_SUBNET",
+ "KEY_CHANGED", "REQ_KEY", "ANS_KEY",
};
projects / meshlink / commitdiff