X-Git-Url: https://tinc-vpn.org/git/browse?p=tinc;a=blobdiff_plain;f=src%2Fprotocol.c;h=f36538e382899ca4f4d3a27ff4267899fb64f185;hp=c8b868caa730ffee973f9ae46511dbb551821e17;hb=b58d95eb29662bce4388f95dbc5762b9e2999806;hpb=5db596c6844169f1eb5f804b72abe99d067aaa5a diff --git a/src/protocol.c b/src/protocol.c index c8b868ca..f36538e3 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, + 2000-2012 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 @@ -13,37 +13,27 @@ 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 1.28.4.140 2003/07/12 17:41:46 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 "config.h" - -#include - -#include -#include -#include -#include -#include - -#include -#include +#include "system.h" #include "conf.h" -#include "protocol.h" -#include "meta.h" #include "connection.h" #include "logger.h" +#include "meta.h" +#include "protocol.h" +#include "utils.h" +#include "xalloc.h" -#include "system.h" +bool tunnelserver = false; +bool strictsubnets = false; /* Jumptable for the request handlers */ -static int (*request_handlers[])(connection_t *) = { +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, @@ -64,29 +54,23 @@ static char (*request_name[]) = { static 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; +bool check_id(const char *id) { + for(; *id; id++) + if(!isalnum(*id) && *id != '_') + return false; - return 0; + return true; } /* Generic request routines - takes care of logging and error detection as well */ -int 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 */ @@ -95,170 +79,162 @@ int send_request(connection_t *c, const char *format, ...) va_end(args); if(len < 0 || len > MAXBUFSIZE - 1) { - logger(LOG_ERR, _("Output buffer overflow while sending request to %s (%s)"), + logger(LOG_ERR, "Output buffer overflow while sending request to %s (%s)", c->name, c->hostname); - return -1; + return false; } ifdebug(PROTOCOL) { sscanf(buffer, "%d", &request); ifdebug(META) - logger(LOG_DEBUG, _("Sending %s to %s (%s): %s"), + 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], + logger(LOG_DEBUG, "Sending %s to %s (%s)", request_name[request], c->name, c->hostname); } buffer[len++] = '\n'; - if(c == broadcast) - return broadcast_meta(NULL, buffer, len); - else + if(c == everyone) { + broadcast_meta(NULL, buffer, len); + return true; + } else return send_meta(c, buffer, len); } -int forward_request(connection_t *from) -{ +void forward_request(connection_t *from) { int request; - cp(); - - cp(); ifdebug(PROTOCOL) { sscanf(from->buffer, "%d", &request); ifdebug(META) - logger(LOG_DEBUG, _("Forwarding %s from %s (%s): %s"), + 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)"), + logger(LOG_DEBUG, "Forwarding %s from %s (%s)", request_name[request], from->name, from->hostname); } from->buffer[from->reqlen - 1] = '\n'; - return broadcast_meta(from, from->buffer, from->reqlen); + broadcast_meta(from, from->buffer, from->reqlen); } -int receive_request(connection_t *c) -{ +bool receive_request(connection_t *c) { int request; - cp(); + if(proxytype == PROXY_HTTP && c->allow_request == ID) { + if(!c->buffer[0] || c->buffer[0] == '\r') + return true; + if(!strncasecmp(c->buffer, "HTTP/1.1 ", 9)) { + if(!strncmp(c->buffer + 9, "200", 3)) { + logger(LOG_DEBUG, "Proxy request granted"); + return true; + } else { + logger(LOG_DEBUG, "Proxy request rejected: %s", c->buffer + 9); + return false; + } + } + } 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"), + logger(LOG_DEBUG, "Unknown request from %s (%s): %s", c->name, c->hostname, c->buffer); else - logger(LOG_ERR, _("Unknown request from %s (%s)"), + logger(LOG_ERR, "Unknown request from %s (%s)", c->name, c->hostname); - return -1; + return false; } else { ifdebug(PROTOCOL) { ifdebug(META) - logger(LOG_DEBUG, _("Got %s from %s (%s): %s"), + 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)"), + 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, + logger(LOG_ERR, "Unauthorized request from %s (%s)", c->name, c->hostname); - return -1; + return false; } - if(request_handlers[request] (c)) + if(!request_handlers[request](c)) { /* Something went wrong. Probably scriptkiddies. Terminate. */ - { - logger(LOG_ERR, _("Error while processing %s from %s (%s)"), + + logger(LOG_ERR, "Error while processing %s from %s (%s)", request_name[request], c->name, c->hostname); - return -1; + return false; } } else { - logger(LOG_ERR, _("Bogus data received from %s (%s)"), + logger(LOG_ERR, "Bogus data received from %s (%s)", c->name, c->hostname); - return -1; + return false; } - return 0; + return true; } -static int past_request_compare(past_request_t *a, 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(); - +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); } -int seen_request(char *request) -{ - past_request_t p, *new; - - cp(); +bool seen_request(char *request) { + past_request_t *new, p = {NULL}; p.request = request; if(avl_search(past_request_tree, &p)) { - ifdebug(SCARY_THINGS) logger(LOG_DEBUG, _("Already seen request")); - return 1; + 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); - return 0; + return false; } } -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 left++; } if(left || deleted) - ifdebug(SCARY_THINGS) logger(LOG_DEBUG, _("Aging past requests: deleted %d, left %d\n"), + ifdebug(SCARY_THINGS) logger(LOG_DEBUG, "Aging past requests: deleted %d, left %d", deleted, left); }