along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- $Id: net.c,v 1.35.4.32 2000/09/26 14:06:04 guus Exp $
+ $Id: net.c,v 1.35.4.33 2000/10/11 10:35:16 guus Exp $
*/
#include "config.h"
#include <syslog.h>
#include <unistd.h>
-#include <cipher.h>
#include <utils.h>
#include <xalloc.h>
*/
void strip_mac_addresses(vpn_packet_t *p)
{
- unsigned char tmp[MAXSIZE];
cp
- memcpy(tmp, p->data, p->len);
- p->len -= 12;
- memcpy(p->data, &tmp[12], p->len);
+ memmove(p->data, p->data + 12, p->len -= 12);
cp
}
*/
void add_mac_addresses(vpn_packet_t *p)
{
- unsigned char tmp[MAXSIZE];
cp
- memcpy(&tmp[12], p->data, p->len);
+ memcpy(p->data + 12, p->data, p->len);
p->len += 12;
- tmp[0] = tmp[6] = 0xfe;
- tmp[1] = tmp[7] = 0xfd;
- *((ip_t*)(&tmp[2])) = (ip_t)(htonl(myself->vpn_ip));
- *((ip_t*)(&tmp[8])) = *((ip_t*)(&tmp[26]));
- memcpy(p->data, &tmp[0], p->len);
+ p->data[0] = p->data[6] = 0xfe;
+ p->data[1] = p->data[7] = 0xfd;
+ /* Really evil pointer stuff just below! */
+ *((ip_t*)(&p->data[2])) = (ip_t)(htonl(myself->real_ip));
+ *((ip_t*)(&p->data[8])) = *((ip_t*)(&p->data[26]));
cp
}
-int xsend(conn_list_t *cl, void *packet)
+int xsend(conn_list_t *cl, vpn_packet_t *inpkt)
{
- real_packet_t rp;
+ vpn_packet_t outpkt;
+ int outlen, outpad;
cp
- do_encrypt((vpn_packet_t*)packet, &rp, cl->datakey);
- rp.from = htonl(myself->vpn_ip);
- rp.data.len = htons(rp.data.len);
- rp.len = htons(rp.len);
-
+ outpkt.len = inpkt->len;
+ EVP_EncryptInit(cl->cipher_pktctx, cl->cipher_pkttype, cl->cipher_pktkey, cl->cipher_pktiv);
+ EVP_EncryptUpdate(cl->cipher_pktctx, outpkt.data, &outlen, inpkt->data, inpkt->len);
+ EVP_EncryptFinal(cl->cipher_pktctx, outpkt.data + outlen, &outpad);
+ outlen += outpad;
+
if(debug_lvl > 3)
syslog(LOG_ERR, _("Sending packet of %d bytes to %s (%s)"),
- ntohs(rp.len), cl->name, cl->hostname);
+ outlen, cl->name, cl->hostname);
- total_socket_out += ntohs(rp.len);
+ total_socket_out += outlen;
cl->want_ping = 1;
- if((cl->flags | myself->flags) & TCPONLY)
- return send_tcppacket(cl, (void*)&rp, ntohs(rp.len));
-
- if((send(cl->socket, (char*)&rp, ntohs(rp.len), 0)) < 0)
+ if((send(cl->socket, (char *) &(outpkt.len), outlen + 2, 0)) < 0)
{
syslog(LOG_ERR, _("Error sending packet to %s (%s): %m"),
cl->name, cl->hostname);
return 0;
}
-int xrecv(conn_list_t *cl, void *packet)
+int xrecv(vpn_packet_t *inpkt)
{
- vpn_packet_t vp;
- int lenin;
+ vpn_packet_t outpkt;
+ int outlen, outpad;
cp
- do_decrypt((real_packet_t*)packet, &vp, cl->datakey);
- add_mac_addresses(&vp);
-
if(debug_lvl > 3)
- syslog(LOG_ERR, _("Receiving packet of %d bytes from %s (%s)"),
- ((real_packet_t*)packet)->len, cl->name, cl->hostname);
+ syslog(LOG_ERR, _("Receiving packet of %d bytes"),
+ inpkt->len);
+
+ outpkt.len = inpkt->len;
+ EVP_DecryptInit(myself->cipher_pktctx, myself->cipher_pkttype, myself->cipher_pktkey, myself->cipher_pktiv);
+ EVP_DecryptUpdate(myself->cipher_pktctx, outpkt.data, &outlen, inpkt->data, inpkt->len);
+ /* FIXME: grok DecryptFinal
+ EVP_DecryptFinal(myself->cipher_pktctx, outpkt.data + outlen, &outpad);
+ */
+
+ add_mac_addresses(&outpkt);
- if((lenin = write(tap_fd, &vp, vp.len + sizeof(vp.len))) < 0)
+ if(write(tap_fd, outpkt.data, outpkt.len) < 0)
syslog(LOG_ERR, _("Can't write to tap device: %m"));
else
- total_tap_out += lenin;
-
- cl->want_ping = 0;
- cl->last_ping_time = time(NULL);
+ total_tap_out += outpkt.len;
cp
return 0;
}
if(!cl->status.validkey)
{
if(debug_lvl > 3)
- syslog(LOG_INFO, _("%s (%s) has no valid key, queueing packet"),
+ 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);
if(!cl->status.waitingforkey)
- send_key_request(cl->vpn_ip); /* Keys should be sent to the host running the tincd */
+ send_req_key(myself, cl); /* Keys should be sent to the host running the tincd */
return 0;
}
cp
myself = new_conn_list();
- if(!(cfg = get_config_val(myvpnip)))
+ myself->hostname = "MYSELF"; /* FIXME? */
+ myself->flags = 0;
+
+ if(!(cfg = get_config_val(tincname))) /* Not acceptable */
{
- syslog(LOG_ERR, _("No value for my VPN IP given"));
+ syslog(LOG_ERR, _("Name for tinc daemon required!"));
return -1;
}
-
- myself->vpn_ip = cfg->data.ip->ip;
- myself->hostname = hostlookup(htonl(myself->vpn_ip));
- myself->vpn_mask = cfg->data.ip->mask;
- myself->flags = 0;
-
- if(!(cfg = get_config_val(tincname)))
- asprintf(&(myself->name), IP_ADDR_S, IP_ADDR_V(myself->vpn_ip));
else
myself->name = (char*)cfg->data.val;
udp socket and write it to the ethertap
device after being decrypted
*/
-int handle_incoming_vpn_data(conn_list_t *cl)
+int handle_incoming_vpn_data()
{
- real_packet_t rp;
+ vpn_packet_t pkt;
int lenin;
int x, l = sizeof(x);
- conn_list_t *f;
cp
- if(getsockopt(cl->socket, SOL_SOCKET, SO_ERROR, &x, &l) < 0)
+ if(getsockopt(myself->socket, SOL_SOCKET, SO_ERROR, &x, &l) < 0)
{
- syslog(LOG_ERR, _("This is a bug: %s:%d: %d:%m %s (%s)"),
- __FILE__, __LINE__, cl->socket,
- cl->name, cl->hostname);
+ syslog(LOG_ERR, _("This is a bug: %s:%d: %d:%m"),
+ __FILE__, __LINE__, myself->socket);
return -1;
}
if(x)
{
- syslog(LOG_ERR, _("Incoming data socket error for %s (%s): %s"),
- cl->name, cl->hostname, strerror(x));
+ syslog(LOG_ERR, _("Incoming data socket error: %s"), strerror(x));
return -1;
}
- rp.len = -1;
- lenin = recvfrom(cl->socket, &rp, MTU, 0, NULL, NULL);
- if(lenin <= 0)
+ if(recvfrom(myself->socket, (char *) &(pkt.len), MTU, 0, NULL, NULL) <= 0)
{
- syslog(LOG_ERR, _("Receiving packet from %s (%s) failed: %m"),
- cl->name, cl->hostname);
+ syslog(LOG_ERR, _("Receiving packet failed: %m"));
return -1;
}
- total_socket_in += lenin;
-
- 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->name, cl->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;
+ return xrecv(&pkt);
}
/*
accept a new tcp connect and create a
new connection
*/
-int handle_new_meta_connection(conn_list_t *cl)
+int handle_new_meta_connection()
{
conn_list_t *ncn;
struct sockaddr client;
int nfd, len = sizeof(client);
cp
- if((nfd = accept(cl->meta_socket, &client, &len)) < 0)
+ if((nfd = accept(myself->meta_socket, &client, &len)) < 0)
{
syslog(LOG_ERR, _("Accepting a new connection failed: %m"));
return -1;
}
if(FD_ISSET(myself->socket, f))
- handle_incoming_vpn_data(myself);
+ handle_incoming_vpn_data();
if(FD_ISSET(myself->meta_socket, f))
- handle_new_meta_connection(myself);
+ handle_new_meta_connection();
cp
}
projects / tinc / blobdiff