along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- $Id: protocol.c,v 1.28.4.84 2001/03/02 11:25:56 guus Exp $
+ $Id: protocol.c,v 1.28.4.90 2001/05/25 08:36:11 guus Exp $
*/
#include "config.h"
#include "system.h"
+int mykeyused = 0;
+
int check_id(char *id)
{
int i;
cp
if(sscanf(cl->buffer, "%d", &request) == 1)
{
- if((request < 0) || (request > 255) || (request_handlers[request] == NULL))
+ if((request < 0) || (request >= LAST) || (request_handlers[request] == NULL))
{
syslog(LOG_ERR, _("Unknown request from %s (%s)"),
cl->name, cl->hostname);
subnet = (subnet_t *)node->data;
send_add_subnet(cl, subnet);
}
+
/* And send him all the hosts and their subnets we know... */
for(node = connection_tree->head; node; node = node->next)
char *netstr;
char *owner;
cp
- if(cl->options & OPTION_INDIRECT)
+ if((cl->options | myself->options | subnet->owner->options) & OPTION_INDIRECT)
owner = myself->name;
else
owner = subnet->owner->name;
int send_add_host(connection_t *cl, connection_t *other)
{
cp
- if(!(cl->options & OPTION_INDIRECT))
+ if(!((cl->options | myself->options | other->options) & OPTION_INDIRECT))
return send_request(cl, "%d %s %lx:%d %lx", ADD_HOST,
other->name, other->address, other->port, other->options);
else
int send_del_host(connection_t *cl, connection_t *other)
{
cp
- if(!(cl->options & OPTION_INDIRECT))
+ if(!((cl->options | myself->options) & OPTION_INDIRECT))
return send_request(cl, "%d %s %lx:%d %lx", DEL_HOST,
other->name, other->address, other->port, other->options);
else
int del_host_h(connection_t *cl)
{
char name[MAX_STRING_SIZE];
- ip_t address;
+ ipv4_t address;
port_t port;
long int options;
connection_t *old, *p;
int send_ping(connection_t *cl)
{
+ char salt[SALTLEN*2+1];
cp
cl->status.pinged = 1;
cl->last_ping_time = time(NULL);
+ RAND_bytes(salt, SALTLEN);
+ bin2hex(salt, salt, SALTLEN);
+ salt[SALTLEN*2] = '\0';
cp
- return send_request(cl, "%d", PING);
+ return send_request(cl, "%d %s", PING, salt);
}
int ping_h(connection_t *cl)
int send_pong(connection_t *cl)
{
+ char salt[SALTLEN*2+1];
cp
- return send_request(cl, "%d", PONG);
+ RAND_bytes(salt, SALTLEN);
+ bin2hex(salt, salt, SALTLEN);
+ salt[SALTLEN*2] = '\0';
+cp
+ return send_request(cl, "%d %s", PONG, salt);
}
int pong_h(connection_t *cl)
connection_t *p;
avl_node_t *node;
cp
- for(node = connection_tree->head; node; node = node->next)
+ /* Only send this message if some other daemon requested our key previously.
+ This reduces unnecessary key_changed broadcasts.
+ */
+
+ if(mykeyused)
{
- p = (connection_t *)node->data;
- if(p != cl && p->status.meta && p->status.active)
- if(!(p->options & OPTION_INDIRECT) || from == myself)
- send_request(p, "%d %s", KEY_CHANGED, from->name);
- }
+ for(node = connection_tree->head; node; node = node->next)
+ {
+ p = (connection_t *)node->data;
+ if(p != cl && p->status.meta && p->status.active)
+ if(!(p->options & OPTION_INDIRECT) || from == myself)
+ send_request(p, "%d %s", KEY_CHANGED, from->name);
+ }
+ mykeyused = 0;
+ }
cp
return 0;
}
from->status.validkey = 0;
from->status.waitingforkey = 0;
- send_key_changed(from, cl);
+ if(!(from->options | cl->options | myself->options) & OPTION_INDIRECT)
+ send_key_changed(from, cl);
cp
return 0;
}
/* Check if this key request is for us */
- if(!strcmp(to_id, myself->name))
+ if(!strcmp(to_id, myself->name)) /* Yes, send our own key back */
{
bin2hex(myself->cipher_pktkey, pktkey, myself->cipher_pktkeylength);
pktkey[myself->cipher_pktkeylength*2] = '\0';
send_ans_key(myself, from, pktkey);
+ mykeyused = 1;
}
else
{
int send_tcppacket(connection_t *cl, vpn_packet_t *packet)
{
int x;
-
+cp
x = send_request(cl->nexthop, "%d %hd", PACKET, packet->len);
if(x)
vpn_packet_t packet;
char *p;
int todo, x;
-
- if(sscanf(cl->buffer, "%*d %hd", packet.len) != 1)
+cp
+ if(sscanf(cl->buffer, "%*d %hd", &packet.len) != 1)
{
syslog(LOG_ERR, _("Got bad PACKET from %s (%s)"), cl->name, cl->hostname);
return -1;
p = packet.data;
todo = packet.len;
-
+
while(todo)
{
x = read(cl->meta_socket, p, todo);
if(x==0)
syslog(LOG_NOTICE, _("Connection closed by %s (%s)"), cl->name, cl->hostname);
else
- if(errno==EINTR)
+ if(errno==EINTR || errno==EAGAIN) /* FIXME: select() or poll() or reimplement this evil hack */
continue;
else
syslog(LOG_ERR, _("Error during reception of PACKET from %s (%s): %m"), cl->name, cl->hostname);
p += x;
}
- return receive_packet(cl, &packet);
+ receive_packet(cl, &packet);
+cp
+ return 0;
}
/* Jumptable for the request handlers */