X-Git-Url: http://git.meshlink.io/?a=blobdiff_plain;f=src%2Fprotocol.c;h=1c5b6cfd9c1d43dba0c6a2e21defabdb4c431209;hb=19be9cf7150858311f7898fa3fb525d692d02f64;hp=24ba88b9c9741719a0c6b625eedec9c0a7a73bac;hpb=636200d1a2024982fe5b3062153daa72a8253015;p=meshlink diff --git a/src/protocol.c b/src/protocol.c index 24ba88b9..1c5b6cfd 100644 --- a/src/protocol.c +++ b/src/protocol.c @@ -1,7 +1,7 @@ /* protocol.c -- handle the meta-protocol, basic functions Copyright (C) 1999-2005 Ivo Timmermans, - 2000-2006 Guus Sliepen + 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 @@ -13,11 +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. - - $Id$ + 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" @@ -31,16 +29,18 @@ #include "xalloc.h" bool tunnelserver = false; +bool strictsubnets = false; +bool experimental = false; /* Jumptable for the request handlers */ -static bool (*request_handlers[])(connection_t *, char *) = { +static bool (*request_handlers[])(connection_t *, const char *) = { 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, + key_changed_h, req_key_h, ans_key_h, tcppacket_h, control_h, }; /* Request names */ @@ -50,7 +50,7 @@ static char (*request_name[]) = { "STATUS", "ERROR", "TERMREQ", "PING", "PONG", "ADD_SUBNET", "DEL_SUBNET", - "ADD_EDGE", "DEL_EDGE", "KEY_CHANGED", "REQ_KEY", "ANS_KEY", "PACKET", + "ADD_EDGE", "DEL_EDGE", "KEY_CHANGED", "REQ_KEY", "ANS_KEY", "PACKET", "CONTROL", }; static splay_tree_t *past_request_tree; @@ -71,9 +71,7 @@ bool send_request(connection_t *c, const char *format, ...) { char request[MAXBUFSIZE]; int len; - 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 */ @@ -82,88 +80,71 @@ bool 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(DEBUG_ALWAYS, LOG_ERR, "Output buffer overflow while sending request to %s (%s)", c->name, c->hostname); return false; } - ifdebug(PROTOCOL) { - ifdebug(META) - logger(LOG_DEBUG, _("Sending %s to %s (%s): %s"), - request_name[atoi(request)], c->name, c->hostname, request); - else - logger(LOG_DEBUG, _("Sending %s to %s (%s)"), request_name[atoi(request)], - c->name, c->hostname); - } + logger(DEBUG_META, LOG_DEBUG, "Sending %s to %s (%s): %s", request_name[atoi(request)], c->name, c->hostname, request); request[len++] = '\n'; - if(c == broadcast) { + if(c == everyone) { broadcast_meta(NULL, request, len); return true; } else return send_meta(c, request, len); } -void forward_request(connection_t *from, char *request) { - cp(); - - ifdebug(PROTOCOL) { - ifdebug(META) - logger(LOG_DEBUG, _("Forwarding %s from %s (%s): %s"), - request_name[atoi(request)], from->name, from->hostname, request); - else - logger(LOG_DEBUG, _("Forwarding %s from %s (%s)"), - request_name[atoi(request)], from->name, from->hostname); - } +void forward_request(connection_t *from, const char *request) { + logger(DEBUG_META, LOG_DEBUG, "Forwarding %s from %s (%s): %s", request_name[atoi(request)], from->name, from->hostname, request); + // Create a temporary newline-terminated copy of the request int len = strlen(request); - request[len] = '\n'; - broadcast_meta(from, request, len); + char tmp[len + 1]; + memcpy(tmp, request, len); + tmp[len] = '\n'; + broadcast_meta(from, tmp, sizeof tmp); } -bool receive_request(connection_t *c, char *request) { - int reqno = atoi(request); +bool receive_request(connection_t *c, const char *request) { + if(proxytype == PROXY_HTTP && c->allow_request == ID) { + if(!request[0] || request[0] == '\r') + return true; + if(!strncasecmp(request, "HTTP/1.1 ", 9)) { + if(!strncmp(request + 9, "200", 3)) { + logger(DEBUG_CONNECTIONS, LOG_DEBUG, "Proxy request granted"); + return true; + } else { + logger(DEBUG_ALWAYS, LOG_DEBUG, "Proxy request rejected: %s", request + 9); + return false; + } + } + } - cp(); + int reqno = atoi(request); if(reqno || *request == '0') { if((reqno < 0) || (reqno >= LAST) || !request_handlers[reqno]) { - ifdebug(META) - logger(LOG_DEBUG, _("Unknown request from %s (%s): %s"), - c->name, c->hostname, request); - else - logger(LOG_ERR, _("Unknown request from %s (%s)"), - c->name, c->hostname); - + logger(DEBUG_META, LOG_DEBUG, "Unknown request from %s (%s): %s", c->name, c->hostname, request); return false; } else { - ifdebug(PROTOCOL) { - ifdebug(META) - logger(LOG_DEBUG, _("Got %s from %s (%s): %s"), - request_name[reqno], c->name, c->hostname, request); - else - logger(LOG_DEBUG, _("Got %s from %s (%s)"), - request_name[reqno], c->name, c->hostname); - } + logger(DEBUG_META, LOG_DEBUG, "Got %s from %s (%s): %s", request_name[reqno], c->name, c->hostname, request); } if((c->allow_request != ALL) && (c->allow_request != reqno)) { - logger(LOG_ERR, _("Unauthorized request from %s (%s)"), c->name, - c->hostname); + logger(DEBUG_ALWAYS, LOG_ERR, "Unauthorized request from %s (%s)", c->name, c->hostname); return false; } if(!request_handlers[reqno](c, request)) { /* Something went wrong. Probably scriptkiddies. Terminate. */ - logger(LOG_ERR, _("Error while processing %s from %s (%s)"), - request_name[reqno], c->name, c->hostname); + logger(DEBUG_ALWAYS, LOG_ERR, "Error while processing %s from %s (%s)", request_name[reqno], c->name, c->hostname); return false; } } else { - logger(LOG_ERR, _("Bogus data received from %s (%s)"), - c->name, c->hostname); + logger(DEBUG_ALWAYS, LOG_ERR, "Bogus data received from %s (%s)", c->name, c->hostname); return false; } @@ -175,25 +156,21 @@ static int past_request_compare(const past_request_t *a, const past_request_t *b } static void free_past_request(past_request_t *r) { - cp(); - if(r->request) - free(r->request); + free((char *)r->request); free(r); } static struct event past_request_event; -bool seen_request(char *request) { - past_request_t *new, p = {0}; - - cp(); +bool seen_request(const char *request) { + past_request_t *new, p = {NULL}; p.request = request; if(splay_search(past_request_tree, &p)) { - ifdebug(SCARY_THINGS) logger(LOG_DEBUG, _("Already seen request")); + logger(DEBUG_SCARY_THINGS, LOG_DEBUG, "Already seen request"); return true; } else { new = xmalloc(sizeof *new); @@ -205,26 +182,24 @@ bool seen_request(char *request) { } } -void age_past_requests(int fd, short events, void *data) { +static void age_past_requests(int fd, short events, void *data) { splay_node_t *node, *next; past_request_t *p; int left = 0, deleted = 0; time_t now = time(NULL); - cp(); - for(node = past_request_tree->head; node; node = next) { next = node->next; p = node->data; - if(p->firstseen + pinginterval < now) + if(p->firstseen + pinginterval <= now) splay_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"), + logger(DEBUG_SCARY_THINGS, LOG_DEBUG, "Aging past requests: deleted %d, left %d", deleted, left); if(left) @@ -232,17 +207,14 @@ void age_past_requests(int fd, short events, void *data) { } void init_requests(void) { - cp(); - past_request_tree = splay_alloc_tree((splay_compare_t) past_request_compare, (splay_action_t) free_past_request); timeout_set(&past_request_event, age_past_requests, NULL); } void exit_requests(void) { - cp(); - splay_delete_tree(past_request_tree); - event_del(&past_request_event); + if(timeout_initialized(&past_request_event)) + event_del(&past_request_event); }