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- Reinstated a queue for outgoing packets.

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This commit is contained in:
Guus Sliepen 2001-01-07 15:25:49 +00:00
parent 049ff67817
commit 07a08f5539
9 changed files with 119 additions and 211 deletions
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10
src/connection.c
View file

@ -17,7 +17,7 @@
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
$Id: connection.c,v 1.1.2.7 2001/01/05 23:53:49 guus Exp $
$Id: connection.c,v 1.1.2.8 2001/01/07 15:25:40 guus Exp $
*/
#include "config.h"
@ -26,6 +26,7 @@
#include <syslog.h>
#include <avl_tree.h>
#include <list.h>
#include "net.h" /* Don't ask. */
#include "netutl.h"
@ -77,6 +78,7 @@ connection_t *new_connection(void)
connection_t *p = (connection_t *)xmalloc_and_zero(sizeof(*p));
cp
p->subnet_tree = avl_alloc_tree((avl_compare_t)subnet_compare, NULL);
p->queue = list_alloc((list_action_t)free);
cp
return p;
}
@ -84,10 +86,8 @@ cp
void free_connection(connection_t *p)
{
cp
if(p->sq)
destroy_queue(p->sq);
if(p->rq)
destroy_queue(p->rq);
if(p->queue)
list_delete_list(p->queue);
if(p->name && p->name!=unknown)
free(p->name);
if(p->hostname)

11
src/connection.h
View file

@ -17,13 +17,14 @@
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
$Id: connection.h,v 1.1.2.4 2001/01/05 23:53:49 guus Exp $
$Id: connection.h,v 1.1.2.5 2001/01/07 15:25:41 guus Exp $
*/
#ifndef __TINC_CONNECTION_H__
#define __TINC_CONNECTION_H__
#include <avl_tree.h>
#include <list.h>
#include "config.h"
@ -74,16 +75,12 @@ typedef struct connection_t {
int socket; /* our udp vpn socket */
int meta_socket; /* our tcp meta socket */
status_bits_t status; /* status info */
packet_queue_t *sq; /* pending outgoing packets */
packet_queue_t *rq; /* pending incoming packets (they have no
valid key to be decrypted with) */
RSA *rsa_key; /* the public/private key */
RSA *rsa_key; /* the public/private key */
EVP_CIPHER_CTX *cipher_inctx; /* Context of encrypted meta data that will come from him to us */
EVP_CIPHER_CTX *cipher_outctx; /* Context of encrypted meta data that will be sent from us to him */
char *cipher_inkey; /* His symmetric meta key */
char *cipher_outkey; /* Our symmetric meta key */
EVP_CIPHER *cipher_pkttype; /* Cipher type for encrypted vpn packets */
char *cipher_pktkey; /* Cipher key and iv */
int cipher_pktkeylength; /* Cipher key and iv length*/
@ -95,6 +92,8 @@ typedef struct connection_t {
time_t last_ping_time; /* last time we saw some activity from the other end */
list_t *queue; /* Queue for packets awaiting to be encrypted */
char *mychallenge; /* challenge we received from him */
char *hischallenge; /* challenge we sent to him */

168
src/net.c
View file

@ -17,7 +17,7 @@
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
$Id: net.c,v 1.35.4.89 2001/01/05 23:53:49 guus Exp $
$Id: net.c,v 1.35.4.90 2001/01/07 15:25:41 guus Exp $
*/
#include "config.h"
@ -72,10 +72,10 @@
#include <utils.h>
#include <xalloc.h>
#include <avl_tree.h>
#include <list.h>
#include "conf.h"
#include "connection.h"
#include "list.h"
#include "meta.h"
#include "net.h"
#include "netutl.h"
@ -190,129 +190,6 @@ cp
return 0;
}
/*
add the given packet of size s to the
queue q, be it the send or receive queue
*/
void add_queue(packet_queue_t **q, void *packet, size_t s)
{
queue_element_t *e;
cp
e = xmalloc(sizeof(*e));
e->packet = xmalloc(s);
memcpy(e->packet, packet, s);
if(!*q)
{
*q = xmalloc(sizeof(**q));
(*q)->head = (*q)->tail = NULL;
}
e->next = NULL; /* We insert at the tail */
if((*q)->tail) /* Do we have a tail? */
{
(*q)->tail->next = e;
e->prev = (*q)->tail;
}
else /* No tail -> no head too */
{
(*q)->head = e;
e->prev = NULL;
}
(*q)->tail = e;
cp
}
/* Remove a queue element */
void del_queue(packet_queue_t **q, queue_element_t *e)
{
cp
free(e->packet);
if(e->next) /* There is a successor, so we are not tail */
{
if(e->prev) /* There is a predecessor, so we are not head */
{
e->next->prev = e->prev;
e->prev->next = e->next;
}
else /* We are head */
{
e->next->prev = NULL;
(*q)->head = e->next;
}
}
else /* We are tail (or all alone!) */
{
if(e->prev) /* We are not alone :) */
{
e->prev->next = NULL;
(*q)->tail = e->prev;
}
else /* Adieu */
{
free(*q);
*q = NULL;
}
}
free(e);
cp
}
/*
flush a queue by calling function for
each packet, and removing it when that
returned a zero exit code
*/
void flush_queue(connection_t *cl, packet_queue_t **pq,
int (*function)(connection_t*,vpn_packet_t*))
{
queue_element_t *p, *next = NULL;
cp
for(p = (*pq)->head; p != NULL; )
{
next = p->next;
if(!function(cl, p->packet))
del_queue(pq, p);
p = next;
}
if(debug_lvl >= DEBUG_TRAFFIC)
syslog(LOG_DEBUG, _("Queue flushed"));
cp
}
/*
flush the send&recv queues
void because nothing goes wrong here, packets
remain in the queue if something goes wrong
*/
void flush_queues(connection_t *cl)
{
cp
if(cl->sq)
{
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 >= DEBUG_TRAFFIC)
syslog(LOG_DEBUG, _("Flushing receive queue for %s (%s)"),
cl->name, cl->hostname);
flush_queue(cl, &(cl->rq), xrecv);
}
cp
}
/*
send a packet to the given vpn ip.
*/
@ -345,39 +222,52 @@ cp
return -1;
}
if(!cl->status.active)
{
if(debug_lvl >= DEBUG_TRAFFIC)
syslog(LOG_INFO, _("%s (%s) is not active, dropping packet"),
cl->name, cl->hostname);
return 0;
}
/* If we ourselves have indirectdata flag set, we should send only to our uplink! */
/* FIXME - check for indirection and reprogram it The Right Way(tm) this time. */
if(!cl->status.validkey)
{
/* FIXME: Don't queue until everything else is fixed.
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);
*/
list_insert_tail(cl->queue, packet);
if(!cl->status.waitingforkey)
send_req_key(myself, cl); /* Keys should be sent to the host running the tincd */
return 0;
}
if(!cl->status.active)
{
/* FIXME: Don't queue until everything else is fixed.
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);
*/
return 0; /* We don't want to mess up, do we? */
}
/* can we send it? can we? can we? huh? */
cp
return xsend(cl, packet);
}
void flush_queue(connection_t *cl)
{
list_node_t *node, *next;
if(debug_lvl >= DEBUG_TRAFFIC)
syslog(LOG_INFO, _("Flushing queue for %s (%s)"), cl->name, cl->hostname);
for(node = cl->queue->head; node; node = next)
{
next = node->next;
xsend(cl, (vpn_packet_t *)node->data);
list_delete_node(cl->queue, node);
}
}
/*
open the local ethertap device
*/

6
src/net.h
View file

@ -16,7 +16,7 @@
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
$Id: net.h,v 1.9.4.24 2000/12/22 21:34:23 guus Exp $
$Id: net.h,v 1.9.4.25 2001/01/07 15:25:44 guus Exp $
*/
#ifndef __TINC_NET_H__
@ -117,9 +117,7 @@ extern void close_network_connections(void);
extern void main_loop(void);
extern int setup_vpn_connection(connection_t *);
extern void terminate_connection(connection_t *);
extern void flush_queues(connection_t *);
extern void add_queue(packet_queue_t **, void *, size_t);
extern void flush_queue(connection_t *);
#include <config.h>
#ifdef HAVE_OPENSSL_RSA_H

24
src/netutl.c
View file

@ -1,6 +1,7 @@
/*
netutl.c -- some supporting network utility code
Copyright (C) 1998,1999,2000 Ivo Timmermans <itimmermans@bigfoot.com>
2000 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
@ -16,7 +17,7 @@
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
$Id: netutl.c,v 1.12.4.16 2000/11/22 18:54:08 guus Exp $
$Id: netutl.c,v 1.12.4.17 2001/01/07 15:25:44 guus Exp $
*/
#include "config.h"
@ -40,27 +41,6 @@
#include "system.h"
/*
free a queue and all of its elements
*/
void destroy_queue(packet_queue_t *pq)
{
queue_element_t *p, *q;
cp
for(p = pq->head; p != NULL; p = q)
{
q = p->next;
if(p->packet)
free(p->packet);
free(p);
}
free(pq);
cp
}
char *hostlookup(unsigned long addr)
{
char *name;

3
src/process.c
View file

@ -17,7 +17,7 @@
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
$Id: process.c,v 1.1.2.18 2001/01/05 23:53:51 guus Exp $
$Id: process.c,v 1.1.2.19 2001/01/07 15:25:45 guus Exp $
*/
#include "config.h"
@ -35,7 +35,6 @@
#include <unistd.h>
#include <termios.h>
#include <list.h>
#include <pidfile.h>
#include <utils.h>
#include <xalloc.h>

3
src/process.h
View file

@ -17,14 +17,13 @@
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
$Id: process.h,v 1.1.2.5 2000/11/24 23:13:06 guus Exp $
$Id: process.h,v 1.1.2.6 2001/01/07 15:25:45 guus Exp $
*/
#ifndef __TINC_PROCESS_H__
#define __TINC_PROCESS_H__
#include "config.h"
#include <list.h>
extern void setup_signals(void);
extern int execute_script(const char *);

5
src/protocol.c
View file

@ -17,7 +17,7 @@
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
$Id: protocol.c,v 1.28.4.72 2001/01/06 18:03:40 guus Exp $
$Id: protocol.c,v 1.28.4.73 2001/01/07 15:25:45 guus Exp $
*/
#include "config.h"
@ -35,6 +35,7 @@
#include <utils.h>
#include <xalloc.h>
#include <avl_tree.h>
#include <list.h>
#include <netinet/in.h>
@ -1258,6 +1259,8 @@ cp
from->status.validkey = 1;
from->status.waitingforkey = 0;
flush_queue(from);
cp
return 0;
}

100
src/route.c
View file

@ -17,7 +17,7 @@
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
$Id: route.c,v 1.1.2.4 2001/01/05 23:53:53 guus Exp $
$Id: route.c,v 1.1.2.5 2001/01/07 15:25:49 guus Exp $
*/
#include "config.h"
@ -33,7 +33,36 @@
#include "system.h"
int routing_mode = RMODE_ROUTER; /* Will be used to determine if we route by MAC or by payload's protocol */
int routing_mode = RMODE_ROUTER;
void learn_mac(connection_t *source, mac_t *address)
{
connection_t *old;
subnet_t *subnet;
cp
old = lookup_subnet_mac(address)->owner;
if(!old)
{
subnet = new_subnet();
subnet->type = SUBNET_MAC;
// subnet->lasttime = gettimeofday();
memcpy(&subnet->net.mac.address, address, sizeof(mac_t));
subnet_add(source, subnet);
if(DEBUG_LVL >= DEBUG_TRAFFIC)
{
syslog(LOG_DEBUG, _("Learned new MAC address %x:%x:%x:%x:%x:%x from %s (%s)"),
address->address.x[0],
address->address.x[1],
address->address.x[2],
address->address.x[3],
address->address.x[4],
address->address.x[5],
cl->name, cl->hostname);
}
}
}
connection_t *route_mac(connection_t *source, vpn_packet_t *packet)
{
@ -42,17 +71,7 @@ connection_t *route_mac(connection_t *source, vpn_packet_t *packet)
cp
/* Learn source address */
oldsrc = lookup_subnet_mac((mac_t *)(&packet->data[0]))->owner;
if(!oldsrc)
{
subnet = new_subnet();
subnet->type = SUBNET_MAC;
memcpy(&subnet->net.mac.address, (mac_t *)(&packet->data[0]), sizeof(mac_t));
subnet_add(source, subnet);
}
/* FIXME: do ageing and roaming */
learn_mac(source, (mac_t *)(&packet->data[0]));
/* Lookup destination address */
@ -96,46 +115,67 @@ connection_t *route_ipv6(vpn_packet_t *packet)
cp
if(debug_lvl > DEBUG_NOTHING)
{
syslog(LOG_WARNING, _("Cannot route packet: IPv6 routing not implemented yet"));
syslog(LOG_WARNING, _("Cannot route packet: IPv6 routing not yet implemented"));
}
cp
return NULL;
}
connection_t *route_packet(connection_t *source, vpn_packet_t *packet)
void route_outgoing(vpn_packet_t *packet)
{
unsigned short int type;
avl_tree_t *node;
connection_t *cl;
cp
/* FIXME: multicast? */
switch(routing_mode)
{
case RMODE_HUB:
return broadcast;
case RMODE_SWITCH:
return route_mac(source, packet);
case RMODE_ROUTER:
type = ntohs(*((unsigned short*)(&packet->data[12])));
switch(type)
{
case 0x0800:
return route_ipv4(packet);
cl = route_ipv4(packet);
break;
case 0x86DD:
return route_ipv6(packet);
/*
case 0x8137:
return route_ipx(packet);
case 0x0806:
return route_arp(packet);
*/
cl = route_ipv6(packet);
break;
default:
if(debug_lvl >= DEBUG_TRAFFIC)
{
syslog(LOG_WARNING, _("Cannot route packet: unknown type %hx"), type);
}
return NULL;
return;
}
send_packet(cl, packet);
break;
case RMODE_SWITCH:
cl = route_mac(packet);
if(cl)
send_packet(cl, packet);
break;
case RMODE_HUB:
for(node = connection_tree->head; node; node = node->next)
{
cl = (connection_t *)node->data;
if(cl->status.active)
send_packet(cl, packet);
}
break;
}
}
void route_incoming(connection_t *source, vpn_packet_t *packet)
{
switch(routing_mode)
{
case RMODE_SWITCH:
learn_mac(source, &packet->data[0]);
break;
}
accept_packet(packet);
}