/*
protocol.c -- handle the meta-protocol
- Copyright (C) 1999,2000 Ivo Timmermans <itimmermans@bigfoot.com>,
- 2000 Guus Sliepen <guus@sliepen.warande.net>
+ Copyright (C) 1999-2001 Ivo Timmermans <itimmermans@bigfoot.com>,
+ 2000,2001 Guus Sliepen <guus@sliepen.warande.net>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- $Id: protocol.c,v 1.28.4.71 2001/01/05 23:53:51 guus Exp $
+ $Id: protocol.c,v 1.28.4.80 2001/02/25 16:34:19 guus Exp $
*/
#include "config.h"
#include <unistd.h>
#include <stdio.h>
#include <stdarg.h>
+#include <errno.h>
#include <utils.h>
#include <xalloc.h>
#include <avl_tree.h>
+#include <list.h>
#include <netinet/in.h>
connection_t *old;
unsigned short int port;
char name[MAX_STRING_SIZE];
+ avl_node_t *node;
cp
if(sscanf(cl->buffer, "%*d "MAX_STRING" %d %lx %hd", name, &cl->protocol_version, &cl->options, &port) != 4)
{
/* And uhr... cl->port just changed so we have to unlink it from the connection tree and re-insert... */
- avl_unlink(connection_tree, cl);
+ node = avl_unlink(connection_tree, cl);
cl->port = port;
- avl_insert(connection_tree, cl);
+ avl_insert_node(connection_tree, node);
/* Read in the public key, so that we can send a challenge */
int ack_h(connection_t *cl)
{
+ config_t const *cfg;
connection_t *old, *p;
subnet_t *subnet;
avl_node_t *node, *node2;
cl->status.active = 1;
cl->status.decryptin = 1;
cl->nexthop = cl;
- cl->cipher_pkttype = EVP_bf_cfb();
+ cl->cipher_pkttype = EVP_bf_cbc();
cl->cipher_pktkeylength = cl->cipher_pkttype->key_len + cl->cipher_pkttype->iv_len;
if(debug_lvl >= DEBUG_CONNECTIONS)
if(!cl->status.outgoing)
send_ack(cl);
+ /* Check some options */
+
+ if((cfg = get_config_val(cl->config, config_indirectdata)))
+ {
+ if(cfg->data.val == stupid_true)
+ cl->options |= OPTION_INDIRECT;
+ }
+
+ if((cfg = get_config_val(cl->config, config_tcponly)))
+ {
+ if(cfg->data.val == stupid_true)
+ cl->options |= OPTION_TCPONLY;
+ }
+
/* Send him our subnets */
for(node = myself->subnet_tree->head; node; node = node->next)
{
int x;
char *netstr;
+ char *owner;
cp
+ if(cl->options & OPTION_INDIRECT)
+ owner = myself->name;
+ else
+ owner = subnet->owner->name;
+
x = send_request(cl, "%d %s %s", ADD_SUBNET,
- subnet->owner->name, netstr = net2str(subnet));
+ owner, netstr = net2str(subnet));
free(netstr);
cp
return x;
{
int x;
char *netstr;
+ char *owner;
cp
- netstr = net2str(subnet);
- x = send_request(cl, "%d %s %s", DEL_SUBNET, subnet->owner->name, netstr);
+ if(cl->options & OPTION_INDIRECT)
+ owner = myself->name;
+ else
+ owner = subnet->owner->name;
+
+ x = send_request(cl, "%d %s %s", DEL_SUBNET, owner, netstr = net2str(subnet));
free(netstr);
cp
return x;
int send_add_host(connection_t *cl, connection_t *other)
{
cp
- return send_request(cl, "%d %s %lx:%d %lx", ADD_HOST,
+ if(!(cl->options & OPTION_INDIRECT))
+ return send_request(cl, "%d %s %lx:%d %lx", ADD_HOST,
other->name, other->address, other->port, other->options);
}
new->nexthop = cl;
new->status.active = 1;
- new->cipher_pkttype = EVP_bf_cfb();
+ new->cipher_pkttype = EVP_bf_cbc();
new->cipher_pktkeylength = cl->cipher_pkttype->key_len + cl->cipher_pkttype->iv_len;
cp
return 0;
int send_del_host(connection_t *cl, connection_t *other)
{
cp
- return send_request(cl, "%d %s %lx:%d %lx", DEL_HOST,
+ if(!(cl->options & OPTION_INDIRECT))
+ return send_request(cl, "%d %s %lx:%d %lx", DEL_HOST,
other->name, other->address, other->port, other->options);
}
return 0;
}
-int send_error(connection_t *cl, int errno, char *errstring)
+int send_error(connection_t *cl, int err, char *errstring)
{
cp
if(!errstring)
- errstring = strerror(errno);
- return send_request(cl, "%d %d %s", ERROR, errno, errstring);
+ errstring = strerror(err);
+ return send_request(cl, "%d %d %s", ERROR, err, errstring);
}
int error_h(connection_t *cl)
{
- int errno;
+ int err;
char errorstring[MAX_STRING_SIZE];
cp
- if(sscanf(cl->buffer, "%*d %d "MAX_STRING, &errno, errorstring) != 2)
+ if(sscanf(cl->buffer, "%*d %d "MAX_STRING, &err, errorstring) != 2)
{
syslog(LOG_ERR, _("Got bad ERROR from %s (%s)"),
cl->name, cl->hostname);
if(debug_lvl >= DEBUG_ERROR)
{
syslog(LOG_NOTICE, _("Error message from %s (%s): %s: %s"),
- cl->name, cl->hostname, strerror(errno), errorstring);
+ cl->name, cl->hostname, strerror(err), errorstring);
}
terminate_connection(cl);
return 0;
}
-/* Keepalive routines - FIXME: needs a closer look */
-
int send_ping(connection_t *cl)
{
cp
{
p = (connection_t *)node->data;
if(p != cl && p->status.meta && p->status.active)
- send_request(p, "%d %s", KEY_CHANGED, from->name);
+ if(!(p->options & OPTION_INDIRECT) || from == myself)
+ send_request(p, "%d %s", KEY_CHANGED, from->name);
}
cp
return 0;
from->status.validkey = 1;
from->status.waitingforkey = 0;
+
+ flush_queue(from);
cp
return 0;
}
+int send_tcppacket(connection_t *cl, vpn_packet_t *packet)
+{
+ int x;
+
+ x = send_request(cl->nexthop, "%d %hd", PACKET, packet->len);
+
+ if(x)
+ return x;
+
+ return send_meta(cl->nexthop, packet->data, packet->len);
+}
+
+int tcppacket_h(connection_t *cl)
+{
+ vpn_packet_t packet;
+ char *p;
+ int todo, x;
+
+ if(sscanf(cl->buffer, "%*d %hd", packet.len) != 1)
+ {
+ syslog(LOG_ERR, _("Got bad PACKET from %s (%s)"), cl->name, cl->hostname);
+ return -1;
+ }
+
+ /* Evil hack. */
+
+ p = packet.data;
+ todo = packet.len;
+
+ while(todo)
+ {
+ x = read(cl->meta_socket, p, todo);
+
+ if(x<=0)
+ {
+ if(x==0)
+ syslog(LOG_NOTICE, _("Connection closed by %s (%s)"), cl->name, cl->hostname);
+ else
+ if(errno==EINTR)
+ continue;
+ else
+ syslog(LOG_ERR, _("Error during reception of PACKET from %s (%s): %m"), cl->name, cl->hostname);
+
+ return -1;
+ }
+
+ todo -= x;
+ p += x;
+ }
+
+ return receive_packet(cl, &packet);
+}
+
/* Jumptable for the request handlers */
int (*request_handlers[])(connection_t*) = {
add_host_h, del_host_h,
add_subnet_h, del_subnet_h,
key_changed_h, req_key_h, ans_key_h,
+ tcppacket_h,
};
/* Request names */
"ADD_HOST", "DEL_HOST",
"ADD_SUBNET", "DEL_SUBNET",
"KEY_CHANGED", "REQ_KEY", "ANS_KEY",
+ "PACKET",
};
/* Status strings */
projects / tinc / blobdiff