X-Git-Url: https://tinc-vpn.org/git/browse?a=blobdiff_plain;f=src%2Fpokey%2Fprotocol.c;fp=src%2Fpokey%2Fprotocol.c;h=0000000000000000000000000000000000000000;hb=013a2e159e42c46808ea8d0b6abd57525db30a50;hp=57030d3dd4f2f6d9390bd9426231f4a4679342dd;hpb=efa5148bc76effb440d807d653dda02de050fde0;p=tinc diff --git a/src/pokey/protocol.c b/src/pokey/protocol.c deleted file mode 100644 index 57030d3d..00000000 --- a/src/pokey/protocol.c +++ /dev/null @@ -1,245 +0,0 @@ -/* - protocol.c -- handle the meta-protocol, basic functions - Copyright (C) 1999-2001 Ivo Timmermans , - 2000,2001 Guus Sliepen - - 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: protocol.c,v 1.2 2002/05/02 11:50:07 zarq Exp $ -*/ - -#include "config.h" - -#include - -#include -#include -#include -#include -#include - -#include -#include - -#include "conf.h" -#include "protocol.h" -#include "meta.h" -#include "connection.h" -#include "interface.h" -#include "logging.h" - -#include "system.h" - -avl_tree_t *past_request_tree; - -int check_id(char *id) -{ - int i; - - for (i = 0; i < strlen(id); i++) - if(!isalnum(id[i]) && id[i] != '_') - return -1; - - return 0; -} - -/* Generic request routines - takes care of logging and error - detection as well */ - -int send_request(connection_t *c, const char *format, ...) -{ - va_list args; - char buffer[MAXBUFSIZE]; - int len, request; - -cp - /* Use vsnprintf instead of vasprintf: faster, no memory - fragmentation, cleanup is automatic, and there is a limit on the - input buffer anyway */ - - va_start(args, format); - len = vsnprintf(buffer, MAXBUFSIZE, format, args); - va_end(args); - - if(len < 0 || len > MAXBUFSIZE-1) - { - syslog(LOG_ERR, _("Output buffer overflow while sending request to %s (%s)"), c->name, c->hostname); - return -1; - } - - if(debug_lvl >= DEBUG_PROTOCOL) - { - sscanf(buffer, "%d", &request); - if(debug_lvl >= DEBUG_META) - syslog(LOG_DEBUG, _("Sending %s to %s (%s): %s"), request_name[request], c->name, c->hostname, buffer); - else - syslog(LOG_DEBUG, _("Sending %s to %s (%s)"), request_name[request], c->name, c->hostname); - } - - buffer[len++] = '\n'; -cp - return send_meta(c, buffer, len); -} - -int receive_request(connection_t *c) -{ - int request; -cp - if(sscanf(c->buffer, "%d", &request) == 1) - { - if((request < 0) || (request >= LAST) || (request_handlers[request] == NULL)) - { - if(debug_lvl >= DEBUG_META) - syslog(LOG_DEBUG, _("Unknown request from %s (%s): %s"), - c->name, c->hostname, c->buffer); - else - syslog(LOG_ERR, _("Unknown request from %s (%s)"), - c->name, c->hostname); - - return -1; - } - else - { - if(debug_lvl >= DEBUG_PROTOCOL) - { - if(debug_lvl >= DEBUG_META) - syslog(LOG_DEBUG, _("Got %s from %s (%s): %s"), - request_name[request], c->name, c->hostname, c->buffer); - else - syslog(LOG_DEBUG, _("Got %s from %s (%s)"), - request_name[request], c->name, c->hostname); - } - } - - if((c->allow_request != ALL) && (c->allow_request != request)) - { - syslog(LOG_ERR, _("Unauthorized request from %s (%s)"), c->name, c->hostname); - return -1; - } - - if(request_handlers[request](c)) - /* Something went wrong. Probably scriptkiddies. Terminate. */ - { - syslog(LOG_ERR, _("Error while processing %s from %s (%s)"), - request_name[request], c->name, c->hostname); - return -1; - } - } - else - { - syslog(LOG_ERR, _("Bogus data received from %s (%s)"), - c->name, c->hostname); - return -1; - } -cp - return 0; -} - -int past_request_compare(past_request_t *a, past_request_t *b) -{ -cp - return strcmp(a->request, b->request); -} - -void free_past_request(past_request_t *r) -{ -cp - if(r->request) - free(r->request); - free(r); -cp -} - -void init_requests(void) -{ -cp - past_request_tree = avl_alloc_tree((avl_compare_t)past_request_compare, (avl_action_t)free_past_request); -cp -} - -void exit_requests(void) -{ -cp - avl_delete_tree(past_request_tree); -cp -} - -int seen_request(char *request) -{ - past_request_t p, *new; -cp - p.request = request; - - if(avl_search(past_request_tree, &p)) - { - if(debug_lvl >= DEBUG_SCARY_THINGS) - syslog(LOG_DEBUG, _("Already seen request")); - return 1; - } - else - { - new = (past_request_t *)xmalloc(sizeof(*new)); - new->request = xstrdup(request); - new->firstseen = now; - avl_insert(past_request_tree, new); - return 0; - } -cp -} - -void age_past_requests(void) -{ - avl_node_t *node, *next; - past_request_t *p; - int left = 0, deleted = 0; -cp - for(node = past_request_tree->head; node; node = next) - { - next = node->next; - p = (past_request_t *)node->data; - if(p->firstseen + pingtimeout < now) - avl_delete_node(past_request_tree, node), deleted++; - else - left++; - } - - if(debug_lvl >= DEBUG_SCARY_THINGS && left + deleted) - syslog(LOG_DEBUG, _("Aging past requests: deleted %d, left %d\n"), deleted, left); -cp -} - -/* Jumptable for the request handlers */ - -int (*request_handlers[])(connection_t*) = { - id_h, metakey_h, challenge_h, chal_reply_h, ack_h, - status_h, error_h, termreq_h, - ping_h, pong_h, - /* add_node_h, del_node_h,*/ - add_subnet_h, del_subnet_h, - add_edge_h, del_edge_h, - key_changed_h, req_key_h, ans_key_h, -}; - -/* Request names */ - -char (*request_name[]) = { - "ID", "METAKEY", "CHALLENGE", "CHAL_REPLY", "ACK", - "STATUS", "ERROR", "TERMREQ", - "PING", "PONG", - /* "ADD_NODE", "DEL_NODE",*/ - "ADD_SUBNET", "DEL_SUBNET", - "ADD_EDGE", "DEL_EDGE", - "KEY_CHANGED", "REQ_KEY", "ANS_KEY", -};