lagertonne/tinc
1
0
Fork 0
Code Issues Pull requests Projects Releases 6 Wiki Activity

Import Upstream version 1.0.10

Browse source
This commit is contained in:
Guus Sliepen 2019-08-26 13:44:38 +02:00
parent 5d002cc66a
commit fa871d431d
152 changed files with 15479 additions and 25408 deletions
Download patch file Download diff file Expand all files Collapse all files

86
src/protocol.c
View file

@ -1,7 +1,7 @@
/*
protocol.c -- handle the meta-protocol, basic functions
Copyright (C) 1999-2005 Ivo Timmermans,
2000-2006 Guus Sliepen <guus@tinc-vpn.org>
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
@ -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 1452 2006-04-26 13:52:58Z guus $
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"
@ -55,8 +53,7 @@ static char (*request_name[]) = {
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 != '_')
return false;
@ -67,15 +64,12 @@ 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;
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 */
@ -84,7 +78,7 @@ 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(LOG_ERR, "Output buffer overflow while sending request to %s (%s)",
c->name, c->hostname);
return false;
}
@ -92,10 +86,10 @@ bool send_request(connection_t *c, const char *format, ...)
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);
}
@ -108,20 +102,17 @@ bool send_request(connection_t *c, const char *format, ...)
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"),
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);
}
@ -130,36 +121,33 @@ 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"),
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 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 false;
}
@ -167,12 +155,12 @@ bool receive_request(connection_t *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 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;
}
@ -180,45 +168,32 @@ bool receive_request(connection_t *c)
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();
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)
{
bool seen_request(char *request) {
past_request_t *new, p = {0};
cp();
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 = xmalloc(sizeof(*new));
@ -229,14 +204,11 @@ 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 = node->data;
@ -248,6 +220,6 @@ void age_past_requests(void)
}
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);
}