X-Git-Url: https://www.tinc-vpn.org/git/browse?p=tinc;a=blobdiff_plain;f=src%2Fprotocol.c;h=d04f9ef6af923da9a35978ebaa1d83aaa73e29a9;hp=0d58d6a8e8ad7d53146431eb04466ac5d4236d54;hb=3f0c1f6b81dd305b0ded2424f9f7da441c7d97b6;hpb=e220187f484f3549df3ad3a04939b9a38051d1a0 diff --git a/src/protocol.c b/src/protocol.c index 0d58d6a8..d04f9ef6 100644 --- a/src/protocol.c +++ b/src/protocol.c @@ -1,7 +1,7 @@ /* protocol.c -- handle the meta-protocol, basic functions - Copyright (C) 1999-2001 Ivo Timmermans , - 2000,2001 Guus Sliepen + Copyright (C) 1999-2005 Ivo Timmermans, + 2000-2016 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 @@ -13,11 +13,9 @@ 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 1.28.4.146 2003/08/03 12:38:43 guus Exp $ + 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., + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */ #include "system.h" @@ -30,34 +28,37 @@ #include "utils.h" #include "xalloc.h" +bool tunnelserver = false; +bool strictsubnets = false; + /* Jumptable for the request handlers */ static bool (*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_subnet_h, del_subnet_h, - add_edge_h, del_edge_h, - key_changed_h, req_key_h, ans_key_h, tcppacket_h, + id_h, metakey_h, challenge_h, chal_reply_h, ack_h, + NULL, NULL, NULL, + ping_h, pong_h, + add_subnet_h, del_subnet_h, + add_edge_h, del_edge_h, + key_changed_h, req_key_h, ans_key_h, tcppacket_h, }; /* Request names */ static char (*request_name[]) = { - "ID", "METAKEY", "CHALLENGE", "CHAL_REPLY", "ACK", - "STATUS", "ERROR", "TERMREQ", - "PING", "PONG", - "ADD_SUBNET", "DEL_SUBNET", - "ADD_EDGE", "DEL_EDGE", "KEY_CHANGED", "REQ_KEY", "ANS_KEY", "PACKET", + "ID", "METAKEY", "CHALLENGE", "CHAL_REPLY", "ACK", + "STATUS", "ERROR", "TERMREQ", + "PING", "PONG", + "ADD_SUBNET", "DEL_SUBNET", + "ADD_EDGE", "DEL_EDGE", "KEY_CHANGED", "REQ_KEY", "ANS_KEY", "PACKET", }; static avl_tree_t *past_request_tree; -bool check_id(const char *id) -{ +bool check_id(const char *id) { for(; *id; id++) - if(!isalnum(*id) && *id != '_') + if(!isalnum(*id) && *id != '_') { return false; + } return true; } @@ -65,62 +66,58 @@ bool check_id(const char *id) /* Generic request routines - takes care of logging and error detection as well */ -bool send_request(connection_t *c, const char *format, ...) -{ +bool send_request(connection_t *c, const char *format, ...) { va_list args; char buffer[MAXBUFSIZE]; - int len, request; + int len, request = 0; - cp(); - - /* Use vsnprintf instead of vasprintf: faster, no memory + /* Use vsnprintf instead of vxasprintf: 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); + len = vsnprintf(buffer, sizeof(buffer), format, args); + buffer[sizeof(buffer) - 1] = 0; va_end(args); - if(len < 0 || len > MAXBUFSIZE - 1) { - logger(LOG_ERR, _("Output buffer overflow while sending request to %s (%s)"), - c->name, c->hostname); + if(len < 0 || (size_t)len > sizeof(buffer) - 1) { + logger(LOG_ERR, "Output buffer overflow while sending request to %s (%s)", + c->name, c->hostname); return false; } ifdebug(PROTOCOL) { sscanf(buffer, "%d", &request); ifdebug(META) - logger(LOG_DEBUG, _("Sending %s to %s (%s): %s"), - request_name[request], c->name, c->hostname, buffer); + logger(LOG_DEBUG, "Sending %s to %s (%s): %s", + request_name[request], c->name, c->hostname, buffer); else - logger(LOG_DEBUG, _("Sending %s to %s (%s)"), request_name[request], - c->name, c->hostname); + logger(LOG_DEBUG, "Sending %s to %s (%s)", request_name[request], + c->name, c->hostname); } buffer[len++] = '\n'; - if(c == broadcast) { + if(c == everyone) { broadcast_meta(NULL, buffer, len); return true; - } else + } else { return send_meta(c, buffer, len); + } } -void forward_request(connection_t *from) -{ +void forward_request(connection_t *from) { int request; - cp(); - ifdebug(PROTOCOL) { sscanf(from->buffer, "%d", &request); ifdebug(META) - logger(LOG_DEBUG, _("Forwarding %s from %s (%s): %s"), - request_name[request], from->name, from->hostname, - from->buffer); + logger(LOG_DEBUG, "Forwarding %s from %s (%s): %s", + request_name[request], from->name, from->hostname, + from->buffer); else - logger(LOG_DEBUG, _("Forwarding %s from %s (%s)"), - request_name[request], from->name, from->hostname); + logger(LOG_DEBUG, "Forwarding %s from %s (%s)", + request_name[request], from->name, from->hostname); } from->buffer[from->reqlen - 1] = '\n'; @@ -128,98 +125,83 @@ void forward_request(connection_t *from) broadcast_meta(from, from->buffer, from->reqlen); } -bool receive_request(connection_t *c) -{ +bool receive_request(connection_t *c) { int request; - cp(); - if(sscanf(c->buffer, "%d", &request) == 1) { if((request < 0) || (request >= LAST) || !request_handlers[request]) { ifdebug(META) - logger(LOG_DEBUG, _("Unknown request from %s (%s): %s"), - c->name, c->hostname, c->buffer); + logger(LOG_DEBUG, "Unknown request from %s (%s): %s", + c->name, c->hostname, c->buffer); else - logger(LOG_ERR, _("Unknown request from %s (%s)"), - c->name, c->hostname); + logger(LOG_ERR, "Unknown request from %s (%s)", + c->name, c->hostname); return false; } else { ifdebug(PROTOCOL) { ifdebug(META) - logger(LOG_DEBUG, _("Got %s from %s (%s): %s"), - request_name[request], c->name, c->hostname, - c->buffer); + logger(LOG_DEBUG, "Got %s from %s (%s): %s", + request_name[request], c->name, c->hostname, + c->buffer); else - logger(LOG_DEBUG, _("Got %s from %s (%s)"), - request_name[request], c->name, c->hostname); + logger(LOG_DEBUG, "Got %s from %s (%s)", + request_name[request], c->name, c->hostname); } } if((c->allow_request != ALL) && (c->allow_request != request)) { - logger(LOG_ERR, _("Unauthorized request from %s (%s)"), c->name, - c->hostname); + logger(LOG_ERR, "Unauthorized request from %s (%s)", c->name, + c->hostname); return false; } if(!request_handlers[request](c)) { /* Something went wrong. Probably scriptkiddies. Terminate. */ - logger(LOG_ERR, _("Error while processing %s from %s (%s)"), - request_name[request], c->name, c->hostname); + logger(LOG_ERR, "Error while processing %s from %s (%s)", + request_name[request], c->name, c->hostname); return false; } } else { - logger(LOG_ERR, _("Bogus data received from %s (%s)"), - c->name, c->hostname); + logger(LOG_ERR, "Bogus data received from %s (%s)", + c->name, c->hostname); return false; } return true; } -static int past_request_compare(const past_request_t *a, const past_request_t *b) -{ +static int past_request_compare(const past_request_t *a, const past_request_t *b) { return strcmp(a->request, b->request); } -static void free_past_request(past_request_t *r) -{ - cp(); - - if(r->request) +static void free_past_request(past_request_t *r) { + if(r->request) { free(r->request); + } free(r); } -void init_requests(void) -{ - cp(); - +void init_requests(void) { past_request_tree = avl_alloc_tree((avl_compare_t) past_request_compare, (avl_action_t) free_past_request); } -void exit_requests(void) -{ - cp(); - +void exit_requests(void) { avl_delete_tree(past_request_tree); } -bool seen_request(char *request) -{ - past_request_t *new, p = {0}; - - cp(); +bool seen_request(char *request) { + past_request_t *new, p = {}; p.request = request; if(avl_search(past_request_tree, &p)) { - ifdebug(SCARY_THINGS) logger(LOG_DEBUG, _("Already seen request")); + ifdebug(SCARY_THINGS) logger(LOG_DEBUG, "Already seen request"); return true; } else { - new = (past_request_t *) xmalloc(sizeof(*new)); + new = xmalloc(sizeof(*new)); new->request = xstrdup(request); new->firstseen = now; avl_insert(past_request_tree, new); @@ -227,25 +209,23 @@ bool seen_request(char *request) } } -void age_past_requests(void) -{ +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; + p = node->data; - if(p->firstseen + pingtimeout < now) + if(p->firstseen + pinginterval <= now) { avl_delete_node(past_request_tree, node), deleted++; - else + } else { left++; + } } if(left || deleted) - ifdebug(SCARY_THINGS) logger(LOG_DEBUG, _("Aging past requests: deleted %d, left %d"), - deleted, left); + ifdebug(SCARY_THINGS) logger(LOG_DEBUG, "Aging past requests: deleted %d, left %d", + deleted, left); }