--- /dev/null
+/*
+ meta.c -- handle the meta communication
+ Copyright (C) 2000 Guus Sliepen <guus@sliepen.warande.net>,
+ 2000 Ivo Timmermans <itimmermans@bigfoot.com>
+
+ 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
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+ $Id: meta.c,v 1.1.2.1 2000/09/26 14:06:03 guus Exp $
+*/
+
+#include "config.h"
+
+int send_meta(conn_list_t *cl, const char *buffer, int length)
+{
+ char outbuf[MAXBUFSIZE];
+ char *bufp;
+cp
+ if(debug_lvl >= DEBUG_META)
+ syslog(LOG_DEBUG, _("Sending %d bytes of metadata to %s (%s): %s"), int length,
+ cl->name, cl->hostname, buffer);
+
+ if(cl->status.encryptout)
+ {
+ if(EVP_EncryptUpdate(cl->cipher_outctx, cl->buffer + cl->buflen, NULL, inbuf, length) != 1)
+ {
+ syslog(LOG_ERR, _("Error during encryption of outgoing metadata to %s (%s)"), cl->name, cl->hostname);
+ return -1;
+ }
+ bufp = outbuf;
+ }
+ else
+ bufp = buffer;
+
+ if(write(cl->meta_socket, bufp, length) < 0)
+ {
+ syslog(LOG_ERR, _("Sending meta data to %s (%s) failed: %m"), cl->name, cl->hostname);
+ return -1;
+ }
+cp
+ return 0;
+}
+
+int broadcast_meta(conn_list_t *cl, const char *buffer, int length)
+{
+ conn_list_t *p;
+cp
+ for(p = conn_list; p != NULL; p = p->next)
+ if(p != cl && p->status.meta && p->status.active)
+ send_meta(p, buffer, length);
+cp
+ return 0;
+}
+
+int receive_meta(conn_list_t *cl)
+{
+ int x, l = sizeof(x);
+ int oldlen, i;
+ int lenin = 0;
+ char inbuf[MAXBUFSIZE];
+ char *bufp;
+cp
+ if(getsockopt(cl->meta_socket, SOL_SOCKET, SO_ERROR, &x, &l) < 0)
+ {
+ syslog(LOG_ERR, _("This is a bug: %s:%d: %d:%m %s (%s)"), __FILE__, __LINE__, cl->meta_socket,
+ cl->name, cl->hostname);
+ return -1;
+ }
+ if(x)
+ {
+ syslog(LOG_ERR, _("Metadata socket error for %s (%s): %s"),
+ cl->name, cl->hostname, strerror(x));
+ return -1;
+ }
+
+ if(cl->status.encryptin)
+ bufp = inbuf;
+ else
+ bufp = cl->buffer + cl->buflen;
+
+ lenin = read(cl->meta_socket, bufp, MAXBUFSIZE - cl->buflen);
+
+ if(lenin<=0)
+ {
+ if(errno==EINTR)
+ return 0;
+ if(errno==0)
+ {
+ if(debug_lvl>DEBUG_CONNECTIONS)
+ syslog(LOG_NOTICE, _("Connection closed by %s (%s)"),
+ cl->name, cl->hostname);
+ }
+ else
+ syslog(LOG_ERR, _("Metadata socket read error for %s (%s): %m"),
+ cl->name, cl->hostname);
+ return -1;
+ }
+
+ if(cl->status.decryptin)
+ {
+ if(EVP_DecryptUpdate(cl->cipher_inctx, cl->buffer + cl->buflen, NULL, inbuf, lenin) != 1)
+ {
+ syslog(LOG_ERR, _("Error during decryption of incoming metadata from %s (%s)"), cl->name, cl->hostname);
+ return -1;
+ }
+ }
+
+ oldlen = cl->buflen;
+ cl->buflen += lenin;
+
+ for(;;)
+ {
+ cl->reqlen = 0;
+
+ for(i = oldlen; i < cl->buflen; i++)
+ {
+ if(cl->buffer[i] == '\n')
+ {
+ cl->buffer[i] = 0; /* replace end-of-line by end-of-string so we can use sscanf */
+ cl->reqlen = i + 1;
+ break;
+ }
+ }
+
+ if(cl->reqlen)
+ {
+ if(debug_lvl > DEBUG_META)
+ syslog(LOG_DEBUG, _("Got request from %s (%s): %s"),
+ cl->name, cl->hostname, cl->buffer);
+
+ if(receive_request(cl))
+ return -1;
+
+ cl->buflen -= cl->reqlen;
+ memmove(cl->buffer, cl->buffer + cl->reqlen, cl->buflen);
+ oldlen = 0;
+ }
+ else
+ {
+ break;
+ }
+ }
+
+ if(cl->buflen >= MAXBUFSIZE)
+ {
+ syslog(LOG_ERR, _("Metadata read buffer overflow for %s (%s)"),
+ cl->name, cl->hostname);
+ return -1;
+ }
+
+ cl->last_ping_time = time(NULL);
+ cl->want_ping = 0;
+cp
+ return 0;
+}
--- /dev/null
+/*
+ protocol.h -- header for protocol.c
+ Copyright (C) 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
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+ $Id: meta.h,v 1.1.2.1 2000/09/26 14:06:04 guus Exp $
+*/
+
+#ifndef __TINC_META_H__
+#define __TINC_META_H__
+
+#include net.h
+
+extern int send_meta(conn_list_t *, const char *, int)
+extern int broadcast_meta(conn_list_t *, const char *, int)
+extern int receive_meta(conn_list_t *)
+
+#endif /* __TINC_META_H__ */
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- $Id: net.c,v 1.35.4.31 2000/09/22 16:20:07 guus Exp $
+ $Id: net.c,v 1.35.4.32 2000/09/26 14:06:04 guus Exp $
*/
#include "config.h"
#include "net.h"
#include "netutl.h"
#include "protocol.h"
+#include "meta.h"
#include "system.h"
return 0;
}
-/*
- dispatch any incoming meta requests
-*/
-int handle_incoming_meta_data(conn_list_t *cl)
-{
- int x, l = sizeof(x);
- int request, oldlen, i;
- int lenin = 0;
-cp
- if(getsockopt(cl->meta_socket, SOL_SOCKET, SO_ERROR, &x, &l) < 0)
- {
- syslog(LOG_ERR, _("This is a bug: %s:%d: %d:%m %s (%s)"), __FILE__, __LINE__, cl->meta_socket,
- cl->name, cl->hostname);
- return -1;
- }
- if(x)
- {
- syslog(LOG_ERR, _("Metadata socket error for %s (%s): %s"),
- cl->name, cl->hostname, strerror(x));
- return -1;
- }
-
- lenin = read(cl->meta_socket, cl->buffer+cl->buflen, MAXBUFSIZE - cl->buflen);
-
- if(lenin<=0)
- {
- if(errno==EINTR)
- return 0;
- if(errno==0)
- {
- if(debug_lvl>DEBUG_CONNECTIONS)
- syslog(LOG_NOTICE, _("Connection closed by %s (%s)"),
- cl->name, cl->hostname);
- }
- else
- syslog(LOG_ERR, _("Metadata socket read error for %s (%s): %m"),
- cl->name, cl->hostname);
- return -1;
- }
-
- if(cl->status.encryptin)
- {
- /* FIXME: do decryption. */
- }
-
- oldlen = cl->buflen;
- cl->buflen += lenin;
-
- for(;;)
- {
- cl->reqlen = 0;
-
- for(i = oldlen; i < cl->buflen; i++)
- {
- if(cl->buffer[i] == '\n')
- {
- cl->buffer[i] = 0; /* replace end-of-line by end-of-string so we can use sscanf */
- cl->reqlen = i + 1;
- break;
- }
- }
-
- if(cl->reqlen)
- {
- if(debug_lvl > DEBUG_PROTOCOL)
- syslog(LOG_DEBUG, _("Got request from %s (%s): %s"),
- cl->name, cl->hostname, cl->buffer);
- if(sscanf(cl->buffer, "%d", &request) == 1)
- {
- if((request < 0) || (request > 255) || (request_handlers[request] == NULL))
- {
- syslog(LOG_ERR, _("Unknown request from %s (%s)"),
- cl->name, cl->hostname);
- return -1;
- }
- else
- {
- if(debug_lvl > DEBUG_PROTOCOL)
- syslog(LOG_DEBUG, _("Got %s from %s (%s)"),
- request_name[request], cl->name, cl->hostname);
- }
- if(request_handlers[request](cl))
- /* Something went wrong. Probably scriptkiddies. Terminate. */
- {
- syslog(LOG_ERR, _("Error while processing %s from %s (%s)"),
- request_name[request], cl->name, cl->hostname);
- return -1;
- }
- }
- else
- {
- syslog(LOG_ERR, _("Bogus data received from %s (%s)"),
- cl->name, cl->hostname);
- return -1;
- }
-
- cl->buflen -= cl->reqlen;
- memmove(cl->buffer, cl->buffer + cl->reqlen, cl->buflen);
- oldlen = 0;
- }
- else
- {
- break;
- }
- }
-
- if(cl->buflen >= MAXBUFSIZE)
- {
- syslog(LOG_ERR, _("Metadata read buffer overflow for %s (%s)"),
- cl->name, cl->hostname);
- return -1;
- }
-
- cl->last_ping_time = time(NULL);
- cl->want_ping = 0;
-cp
- return 0;
-}
-
/*
check all connections to see if anything
happened on their sockets
if(p->status.meta)
if(FD_ISSET(p->meta_socket, f))
- if(handle_incoming_meta_data(p) < 0)
+ if(receive_meta(p) < 0)
{
terminate_connection(p);
return;
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- $Id: protocol.c,v 1.28.4.35 2000/09/22 16:20:07 guus Exp $
+ $Id: protocol.c,v 1.28.4.36 2000/09/26 14:06:06 guus Exp $
*/
#include "config.h"
#include "net.h"
#include "netutl.h"
#include "protocol.h"
+#include "meta.h"
#include "system.h"
return 1;
}
-/* Generic outgoing request routine - takes care of logging and error detection as well */
+/* Generic request routines - takes care of logging and error detection as well */
int send_request(conn_list_t *cl, const char *format, int request, /*args*/ ...)
{
return send_meta(cl, buffer, length);
}
-
-int send_meta(conn_list_t *cl, const char *buffer, int length)
+int receive_request(conn_list_t *cl)
{
-cp
- if(debug_lvl >= DEBUG_META)
- syslog(LOG_DEBUG, _("Sending %d bytes of metadata to %s (%s): %s"), int length,
- cl->name, cl->hostname, buffer);
-
- if(cl->status.encryptin)
+ int request;
+cp
+ if(sscanf(cl->buffer, "%d", &request) == 1)
{
- /* FIXME: Do encryption */
+ if((request < 0) || (request > 255) || (request_handlers[request] == NULL))
+ {
+ syslog(LOG_ERR, _("Unknown request from %s (%s)"),
+ cl->name, cl->hostname);
+ return -1;
+ }
+ else
+ {
+ if(debug_lvl > DEBUG_PROTOCOL)
+ syslog(LOG_DEBUG, _("Got %s from %s (%s)"),
+ request_name[request], cl->name, cl->hostname);
+ }
+ if(request_handlers[request](cl))
+ /* Something went wrong. Probably scriptkiddies. Terminate. */
+ {
+ syslog(LOG_ERR, _("Error while processing %s from %s (%s)"),
+ request_name[request], cl->name, cl->hostname);
+ return -1;
+ }
}
-
- if(write(cl->meta_socket, buffer, length) < 0)
+ else
{
- syslog(LOG_ERR, _("Sending meta data to %s (%s) failed: %m"), cl->name, cl->hostname);
+ syslog(LOG_ERR, _("Bogus data received from %s (%s)"),
+ cl->name, cl->hostname);
return -1;
}
-cp
- return 0;
-}
-
-int broadcast_meta(conn_list_t *cl, const char *buffer, int length)
-{
- conn_list_t *p;
-cp
- for(p = conn_list; p != NULL; p = p->next)
- if(p != cl && p->status.meta && p->status.active)
- send_meta(p, buffer, length);
-cp
- return 0;
}
/* Connection protocol:
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- $Id: protocol.h,v 1.5.4.7 2000/09/11 10:05:35 guus Exp $
+ $Id: protocol.h,v 1.5.4.8 2000/09/26 14:06:11 guus Exp $
*/
#ifndef __TINC_PROTOCOL_H__
incompatible version have different protocols.
*/
-enum {
- PROT_RESERVED = 0, /* reserved: do not use. */
- PROT_NOT_IN_USE,
- PROT_TOO_OLD = 2,
- PROT_3,
- PROT_4,
- PROT_ECHELON,
- PROT_6,
- PROT_7,
- PROT_CURRENT, /* protocol currently in use */
-};
+#define PROT_CURRENT 8
+
+/* Length of the challenge. Since the challenge will also
+ contain the key for the symmetric cipher, it must be
+ quite large.
+ */
+
+#define CHAL_LENGTH 2048
/* Request numbers */
extern int notify_others(conn_list_t *, conn_list_t *, int (*function)(conn_list_t*, conn_list_t*));
#endif /* __TINC_PROTOCOL_H__ */
-
-
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