/*
protocol.c -- handle the meta-protocol, basic functions
- Copyright (C) 1999-2001 Ivo Timmermans <ivo@o2w.nl>,
- 2000,2001 Guus Sliepen <guus@sliepen.eu.org>
+ Copyright (C) 1999-2005 Ivo Timmermans,
+ 2000-2009 Guus Sliepen <guus@tinc-vpn.org>
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
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 1.32 2003/08/24 20:38:27 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"
#include "utils.h"
#include "xalloc.h"
+bool tunnelserver = false;
+bool strictsubnets = false;
+bool experimental = false;
+
/* Jumptable for the request handlers */
-static bool (*request_handlers[])(connection_t *) = {
+static bool (*request_handlers[])(connection_t *, 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 */
"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 avl_tree_t *past_request_tree;
+static splay_tree_t *past_request_tree;
-bool check_id(const char *id)
-{
+bool check_id(const char *id) {
for(; *id; id++)
if(!isalnum(*id) && *id != '_')
return false;
/* 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;
-
- cp();
+ char request[MAXBUFSIZE];
+ int len;
- /* 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(request, MAXBUFSIZE, format, args);
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 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[atoi(request)], c->name, c->hostname, request);
else
- logger(LOG_DEBUG, _("Sending %s to %s (%s)"), request_name[request],
+ logger(LOG_DEBUG, "Sending %s to %s (%s)", request_name[atoi(request)],
c->name, c->hostname);
}
- buffer[len++] = '\n';
+ request[len++] = '\n';
- if(c == broadcast) {
- broadcast_meta(NULL, buffer, len);
+ if(c == everyone) {
+ broadcast_meta(NULL, request, len);
return true;
} else
- return send_meta(c, buffer, len);
+ return send_meta(c, request, len);
}
-void forward_request(connection_t *from)
-{
- int request;
-
- cp();
-
+void forward_request(connection_t *from, char *request) {
+ /* Note: request is not zero terminated anymore after a call to this function! */
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[atoi(request)], from->name, from->hostname, request);
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[atoi(request)], from->name, from->hostname);
}
- from->buffer[from->reqlen - 1] = '\n';
-
- broadcast_meta(from, from->buffer, from->reqlen);
+ int len = strlen(request);
+ request[len++] = '\n';
+ broadcast_meta(from, request, len);
}
-bool receive_request(connection_t *c)
-{
- int request;
+bool receive_request(connection_t *c, char *request) {
+ int reqno = atoi(request);
- cp();
-
- if(sscanf(c->buffer, "%d", &request) == 1) {
- if((request < 0) || (request >= LAST) || !request_handlers[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, c->buffer);
+ logger(LOG_DEBUG, "Unknown request from %s (%s): %s",
+ c->name, c->hostname, request);
else
- logger(LOG_ERR, _("Unknown request from %s (%s)"),
+ 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[reqno], c->name, c->hostname, request);
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[reqno], c->name, c->hostname);
}
}
- if((c->allow_request != ALL) && (c->allow_request != request)) {
- logger(LOG_ERR, _("Unauthorized request from %s (%s)"), c->name,
+ if((c->allow_request != ALL) && (c->allow_request != reqno)) {
+ logger(LOG_ERR, "Unauthorized request from %s (%s)", c->name,
c->hostname);
return false;
}
- if(!request_handlers[request](c)) {
+ if(!request_handlers[reqno](c, request)) {
/* 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[reqno], c->name, c->hostname);
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 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();
-
+static void free_past_request(past_request_t *r) {
if(r->request)
free(r->request);
free(r);
}
-void init_requests(void)
-{
- cp();
-
- past_request_tree = avl_alloc_tree((avl_compare_t) past_request_compare, (avl_action_t) free_past_request);
-}
-
-void exit_requests(void)
-{
- cp();
+static struct event past_request_event;
- 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 = {NULL};
p.request = request;
- if(avl_search(past_request_tree, &p)) {
- ifdebug(SCARY_THINGS) logger(LOG_DEBUG, _("Already seen request"));
+ if(splay_search(past_request_tree, &p)) {
+ 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);
+ new->firstseen = time(NULL);
+ splay_insert(past_request_tree, new);
+ event_add(&past_request_event, &(struct timeval){10, 0});
return false;
}
}
-void age_past_requests(void)
-{
- avl_node_t *node, *next;
+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;
-
- cp();
+ time_t now = time(NULL);
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)
- avl_delete_node(past_request_tree, node), deleted++;
+ 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"),
+ ifdebug(SCARY_THINGS) logger(LOG_DEBUG, "Aging past requests: deleted %d, left %d",
deleted, left);
+
+ if(left)
+ event_add(&past_request_event, &(struct timeval){10, 0});
+}
+
+void init_requests(void) {
+ 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) {
+ splay_delete_tree(past_request_tree);
+
+ if(timeout_initialized(&past_request_event))
+ event_del(&past_request_event);
}
projects / meshlink / blobdiff