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Better length checks.
[tinc]
/
src
/
protocol_auth.c
diff --git
a/src/protocol_auth.c
b/src/protocol_auth.c
index
28c6fea
..
dafcc20
100644
(file)
--- a/
src/protocol_auth.c
+++ b/
src/protocol_auth.c
@@
-1,7
+1,7
@@
/*
protocol_auth.c -- handle the meta-protocol, authentication
/*
protocol_auth.c -- handle the meta-protocol, authentication
- Copyright (C) 1999-200
2
Ivo Timmermans <ivo@o2w.nl>,
- 2000-200
2
Guus Sliepen <guus@sliepen.eu.org>
+ Copyright (C) 1999-200
3
Ivo Timmermans <ivo@o2w.nl>,
+ 2000-200
3
Guus Sliepen <guus@sliepen.eu.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
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
@@
-17,39
+17,29
@@
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- $Id: protocol_auth.c,v 1.1.4.2
2 2003/07/06 23:16:29
guus Exp $
+ $Id: protocol_auth.c,v 1.1.4.2
6 2003/08/28 21:05:11
guus Exp $
*/
*/
-#include "config.h"
-
-#include <stdlib.h>
-#include <string.h>
-#include <stdio.h>
-#include <stdarg.h>
-#include <errno.h>
-
-#include <utils.h>
-#include <xalloc.h>
-#include <avl_tree.h>
+#include "system.h"
#include <openssl/sha.h>
#include <openssl/rand.h>
#include <openssl/evp.h>
#include <openssl/sha.h>
#include <openssl/rand.h>
#include <openssl/evp.h>
+#include "avl_tree.h"
#include "conf.h"
#include "conf.h"
-#include "net.h"
-#include "netutl.h"
-#include "protocol.h"
-#include "meta.h"
#include "connection.h"
#include "connection.h"
-#include "node.h"
#include "edge.h"
#include "graph.h"
#include "logger.h"
#include "edge.h"
#include "graph.h"
#include "logger.h"
+#include "net.h"
+#include "netutl.h"
+#include "node.h"
+#include "protocol.h"
+#include "utils.h"
+#include "xalloc.h"
-#include "system.h"
-
-int send_id(connection_t *c)
+bool send_id(connection_t *c)
{
cp();
{
cp();
@@
-57,34
+47,34
@@
int send_id(connection_t *c)
myself->connection->protocol_version);
}
myself->connection->protocol_version);
}
-
int
id_h(connection_t *c)
+
bool
id_h(connection_t *c)
{
char name[MAX_STRING_SIZE];
{
char name[MAX_STRING_SIZE];
-
int bla
;
+
bool choice
;
cp();
if(sscanf(c->buffer, "%*d " MAX_STRING " %d", name, &c->protocol_version) != 2) {
cp();
if(sscanf(c->buffer, "%*d " MAX_STRING " %d", name, &c->protocol_version) != 2) {
- logger(
DEBUG_ALWAYS,
LOG_ERR, _("Got bad %s from %s (%s)"), "ID", c->name,
+ logger(LOG_ERR, _("Got bad %s from %s (%s)"), "ID", c->name,
c->hostname);
c->hostname);
- return
-1
;
+ return
false
;
}
/* Check if identity is a valid name */
}
/* Check if identity is a valid name */
- if(check_id(name)) {
- logger(
DEBUG_ALWAYS,
LOG_ERR, _("Got bad %s from %s (%s): %s"), "ID", c->name,
+ if(
!
check_id(name)) {
+ logger(LOG_ERR, _("Got bad %s from %s (%s): %s"), "ID", c->name,
c->hostname, "invalid name");
c->hostname, "invalid name");
- return
-1
;
+ return
false
;
}
/* If we set c->name in advance, make sure we are connected to the right host */
if(c->name) {
if(strcmp(c->name, name)) {
}
/* If we set c->name in advance, make sure we are connected to the right host */
if(c->name) {
if(strcmp(c->name, name)) {
- logger(
DEBUG_ALWAYS,
LOG_ERR, _("Peer %s is %s instead of %s"), c->hostname, name,
+ logger(LOG_ERR, _("Peer %s is %s instead of %s"), c->hostname, name,
c->name);
c->name);
- return
-1
;
+ return
false
;
}
} else
c->name = xstrdup(name);
}
} else
c->name = xstrdup(name);
@@
-92,9
+82,9
@@
int id_h(connection_t *c)
/* Check if version matches */
if(c->protocol_version != myself->connection->protocol_version) {
/* Check if version matches */
if(c->protocol_version != myself->connection->protocol_version) {
- logger(
DEBUG_ALWAYS,
LOG_ERR, _("Peer %s (%s) uses incompatible version %d"),
+ logger(LOG_ERR, _("Peer %s (%s) uses incompatible version %d"),
c->name, c->hostname, c->protocol_version);
c->name, c->hostname, c->protocol_version);
- return
-1
;
+ return
false
;
}
if(bypass_security) {
}
if(bypass_security) {
@@
-107,25
+97,23
@@
int id_h(connection_t *c)
if(!c->config_tree) {
init_configuration(&c->config_tree);
if(!c->config_tree) {
init_configuration(&c->config_tree);
- bla = read_connection_config(c);
-
- if(bla) {
- logger(DEBUG_ALWAYS, LOG_ERR, _("Peer %s had unknown identity (%s)"), c->hostname,
+ if(!read_connection_config(c)) {
+ logger(LOG_ERR, _("Peer %s had unknown identity (%s)"), c->hostname,
c->name);
c->name);
- return
-1
;
+ return
false
;
}
}
}
}
- if(read_rsa_public_key(c)) {
- return
-1
;
+ if(
!
read_rsa_public_key(c)) {
+ return
false
;
}
/* Check some options */
}
/* Check some options */
- if((get_config_bool(lookup_config(c->config_tree, "IndirectData"), &
bla) && bla
) || myself->options & OPTION_INDIRECT)
+ if((get_config_bool(lookup_config(c->config_tree, "IndirectData"), &
choice) && choice
) || myself->options & OPTION_INDIRECT)
c->options |= OPTION_INDIRECT;
c->options |= OPTION_INDIRECT;
- if((get_config_bool(lookup_config(c->config_tree, "TCPOnly"), &
bla) && bla
) || myself->options & OPTION_TCPONLY)
+ if((get_config_bool(lookup_config(c->config_tree, "TCPOnly"), &
choice) && choice
) || myself->options & OPTION_TCPONLY)
c->options |= OPTION_TCPONLY | OPTION_INDIRECT;
c->allow_request = METAKEY;
c->options |= OPTION_TCPONLY | OPTION_INDIRECT;
c->allow_request = METAKEY;
@@
-133,10
+121,11
@@
int id_h(connection_t *c)
return send_metakey(c);
}
return send_metakey(c);
}
-
int
send_metakey(connection_t *c)
+
bool
send_metakey(connection_t *c)
{
char buffer[MAX_STRING_SIZE];
{
char buffer[MAX_STRING_SIZE];
- int len, x;
+ int len;
+ bool x;
cp();
cp();
@@
-166,10
+155,10
@@
int send_metakey(connection_t *c)
c->outkey[0] &= 0x7F;
c->outkey[0] &= 0x7F;
- if
(debug_level >= DEBUG_
SCARY_THINGS) {
+ if
debug(
SCARY_THINGS) {
bin2hex(c->outkey, buffer, len);
buffer[len * 2] = '\0';
bin2hex(c->outkey, buffer, len);
buffer[len * 2] = '\0';
- logger(
DEBUG_ALWAYS,
LOG_DEBUG, _("Generated random meta key (unencrypted): %s"),
+ logger(LOG_DEBUG, _("Generated random meta key (unencrypted): %s"),
buffer);
}
buffer);
}
@@
-181,9
+170,9
@@
int send_metakey(connection_t *c)
*/
if(RSA_public_encrypt(len, c->outkey, buffer, c->rsa_key, RSA_NO_PADDING) != len) {
*/
if(RSA_public_encrypt(len, c->outkey, buffer, c->rsa_key, RSA_NO_PADDING) != len) {
- logger(
DEBUG_ALWAYS,
LOG_ERR, _("Error during encryption of meta key for %s (%s)"),
+ logger(LOG_ERR, _("Error during encryption of meta key for %s (%s)"),
c->name, c->hostname);
c->name, c->hostname);
- return
-1
;
+ return
false
;
}
/* Convert the encrypted random data to a hexadecimal formatted string */
}
/* Convert the encrypted random data to a hexadecimal formatted string */
@@
-206,13
+195,13
@@
int send_metakey(connection_t *c)
c->outkey + len - c->outcipher->key_len -
c->outcipher->iv_len);
c->outkey + len - c->outcipher->key_len -
c->outcipher->iv_len);
- c->status.encryptout =
1
;
+ c->status.encryptout =
true
;
}
return x;
}
}
return x;
}
-
int
metakey_h(connection_t *c)
+
bool
metakey_h(connection_t *c)
{
char buffer[MAX_STRING_SIZE];
int cipher, digest, maclength, compression;
{
char buffer[MAX_STRING_SIZE];
int cipher, digest, maclength, compression;
@@
-221,9
+210,9
@@
int metakey_h(connection_t *c)
cp();
if(sscanf(c->buffer, "%*d %d %d %d %d " MAX_STRING, &cipher, &digest, &maclength, &compression, buffer) != 5) {
cp();
if(sscanf(c->buffer, "%*d %d %d %d %d " MAX_STRING, &cipher, &digest, &maclength, &compression, buffer) != 5) {
- logger(
DEBUG_ALWAYS,
LOG_ERR, _("Got bad %s from %s (%s)"), "METAKEY", c->name,
+ logger(LOG_ERR, _("Got bad %s from %s (%s)"), "METAKEY", c->name,
c->hostname);
c->hostname);
- return
-1
;
+ return
false
;
}
len = RSA_size(myself->connection->rsa_key);
}
len = RSA_size(myself->connection->rsa_key);
@@
-231,8
+220,8
@@
int metakey_h(connection_t *c)
/* Check if the length of the meta key is all right */
if(strlen(buffer) != len * 2) {
/* Check if the length of the meta key is all right */
if(strlen(buffer) != len * 2) {
- logger(
DEBUG_ALWAYS,
LOG_ERR, _("Possible intruder %s (%s): %s"), c->name, c->hostname, "wrong keylength");
- return
-1
;
+ logger(LOG_ERR, _("Possible intruder %s (%s): %s"), c->name, c->hostname, "wrong keylength");
+ return
false
;
}
/* Allocate buffers for the meta key */
}
/* Allocate buffers for the meta key */
@@
-250,15
+239,15
@@
int metakey_h(connection_t *c)
/* Decrypt the meta key */
if(RSA_private_decrypt(len, buffer, c->inkey, myself->connection->rsa_key, RSA_NO_PADDING) != len) { /* See challenge() */
/* Decrypt the meta key */
if(RSA_private_decrypt(len, buffer, c->inkey, myself->connection->rsa_key, RSA_NO_PADDING) != len) { /* See challenge() */
- logger(
DEBUG_ALWAYS,
LOG_ERR, _("Error during encryption of meta key for %s (%s)"),
+ logger(LOG_ERR, _("Error during encryption of meta key for %s (%s)"),
c->name, c->hostname);
c->name, c->hostname);
- return
-1
;
+ return
false
;
}
}
- if
(debug_level >= DEBUG_
SCARY_THINGS) {
+ if
debug(
SCARY_THINGS) {
bin2hex(c->inkey, buffer, len);
buffer[len * 2] = '\0';
bin2hex(c->inkey, buffer, len);
buffer[len * 2] = '\0';
- logger(
DEBUG_ALWAYS,
LOG_DEBUG, _("Received random meta key (unencrypted): %s"), buffer);
+ logger(LOG_DEBUG, _("Received random meta key (unencrypted): %s"), buffer);
}
/* All incoming requests will now be encrypted. */
}
/* All incoming requests will now be encrypted. */
@@
-269,8
+258,8
@@
int metakey_h(connection_t *c)
c->incipher = EVP_get_cipherbynid(cipher);
if(!c->incipher) {
c->incipher = EVP_get_cipherbynid(cipher);
if(!c->incipher) {
- logger(
DEBUG_ALWAYS,
LOG_ERR, _("%s (%s) uses unknown cipher!"), c->name, c->hostname);
- return
-1
;
+ logger(LOG_ERR, _("%s (%s) uses unknown cipher!"), c->name, c->hostname);
+ return
false
;
}
EVP_DecryptInit(c->inctx, c->incipher,
}
EVP_DecryptInit(c->inctx, c->incipher,
@@
-278,7
+267,7
@@
int metakey_h(connection_t *c)
c->inkey + len - c->incipher->key_len -
c->incipher->iv_len);
c->inkey + len - c->incipher->key_len -
c->incipher->iv_len);
- c->status.decryptin =
1
;
+ c->status.decryptin =
true
;
} else {
c->incipher = NULL;
}
} else {
c->incipher = NULL;
}
@@
-289,13
+278,13
@@
int metakey_h(connection_t *c)
c->indigest = EVP_get_digestbynid(digest);
if(!c->indigest) {
c->indigest = EVP_get_digestbynid(digest);
if(!c->indigest) {
- logger(
DEBUG_ALWAYS,
LOG_ERR, _("Node %s (%s) uses unknown digest!"), c->name, c->hostname);
- return
-1
;
+ logger(LOG_ERR, _("Node %s (%s) uses unknown digest!"), c->name, c->hostname);
+ return
false
;
}
if(c->inmaclength > c->indigest->md_size || c->inmaclength < 0) {
}
if(c->inmaclength > c->indigest->md_size || c->inmaclength < 0) {
- logger(
DEBUG_ALWAYS,
LOG_ERR, _("%s (%s) uses bogus MAC length!"), c->name, c->hostname);
- return
-1
;
+ logger(LOG_ERR, _("%s (%s) uses bogus MAC length!"), c->name, c->hostname);
+ return
false
;
}
} else {
c->indigest = NULL;
}
} else {
c->indigest = NULL;
@@
-308,10
+297,10
@@
int metakey_h(connection_t *c)
return send_challenge(c);
}
return send_challenge(c);
}
-
int
send_challenge(connection_t *c)
+
bool
send_challenge(connection_t *c)
{
char buffer[MAX_STRING_SIZE];
{
char buffer[MAX_STRING_SIZE];
- int len
, x
;
+ int len;
cp();
cp();
@@
-335,12
+324,10
@@
int send_challenge(connection_t *c)
/* Send the challenge */
/* Send the challenge */
- x = send_request(c, "%d %s", CHALLENGE, buffer);
-
- return x;
+ return send_request(c, "%d %s", CHALLENGE, buffer);
}
}
-
int
challenge_h(connection_t *c)
+
bool
challenge_h(connection_t *c)
{
char buffer[MAX_STRING_SIZE];
int len;
{
char buffer[MAX_STRING_SIZE];
int len;
@@
-348,9
+335,9
@@
int challenge_h(connection_t *c)
cp();
if(sscanf(c->buffer, "%*d " MAX_STRING, buffer) != 1) {
cp();
if(sscanf(c->buffer, "%*d " MAX_STRING, buffer) != 1) {
- logger(
DEBUG_ALWAYS,
LOG_ERR, _("Got bad %s from %s (%s)"), "CHALLENGE", c->name,
+ logger(LOG_ERR, _("Got bad %s from %s (%s)"), "CHALLENGE", c->name,
c->hostname);
c->hostname);
- return
-1
;
+ return
false
;
}
len = RSA_size(myself->connection->rsa_key);
}
len = RSA_size(myself->connection->rsa_key);
@@
-358,9
+345,9
@@
int challenge_h(connection_t *c)
/* Check if the length of the challenge is all right */
if(strlen(buffer) != len * 2) {
/* Check if the length of the challenge is all right */
if(strlen(buffer) != len * 2) {
- logger(
DEBUG_ALWAYS,
LOG_ERR, _("Possible intruder %s (%s): %s"), c->name,
+ logger(LOG_ERR, _("Possible intruder %s (%s): %s"), c->name,
c->hostname, "wrong challenge length");
c->hostname, "wrong challenge length");
- return
-1
;
+ return
false
;
}
/* Allocate buffers for the challenge */
}
/* Allocate buffers for the challenge */
@@
-379,7
+366,7
@@
int challenge_h(connection_t *c)
return send_chal_reply(c);
}
return send_chal_reply(c);
}
-
int
send_chal_reply(connection_t *c)
+
bool
send_chal_reply(connection_t *c)
{
char hash[EVP_MAX_MD_SIZE * 2 + 1];
EVP_MD_CTX ctx;
{
char hash[EVP_MAX_MD_SIZE * 2 + 1];
EVP_MD_CTX ctx;
@@
-403,7
+390,7
@@
int send_chal_reply(connection_t *c)
return send_request(c, "%d %s", CHAL_REPLY, hash);
}
return send_request(c, "%d %s", CHAL_REPLY, hash);
}
-
int
chal_reply_h(connection_t *c)
+
bool
chal_reply_h(connection_t *c)
{
char hishash[MAX_STRING_SIZE];
char myhash[EVP_MAX_MD_SIZE];
{
char hishash[MAX_STRING_SIZE];
char myhash[EVP_MAX_MD_SIZE];
@@
-412,17
+399,17
@@
int chal_reply_h(connection_t *c)
cp();
if(sscanf(c->buffer, "%*d " MAX_STRING, hishash) != 1) {
cp();
if(sscanf(c->buffer, "%*d " MAX_STRING, hishash) != 1) {
- logger(
DEBUG_ALWAYS,
LOG_ERR, _("Got bad %s from %s (%s)"), "CHAL_REPLY", c->name,
+ logger(LOG_ERR, _("Got bad %s from %s (%s)"), "CHAL_REPLY", c->name,
c->hostname);
c->hostname);
- return
-1
;
+ return
false
;
}
/* Check if the length of the hash is all right */
if(strlen(hishash) != c->outdigest->md_size * 2) {
}
/* Check if the length of the hash is all right */
if(strlen(hishash) != c->outdigest->md_size * 2) {
- logger(
DEBUG_ALWAYS,
LOG_ERR, _("Possible intruder %s (%s): %s"), c->name,
+ logger(LOG_ERR, _("Possible intruder %s (%s): %s"), c->name,
c->hostname, _("wrong challenge reply length"));
c->hostname, _("wrong challenge reply length"));
- return
-1
;
+ return
false
;
}
/* Convert the hash to binary format */
}
/* Convert the hash to binary format */
@@
-438,16
+425,16
@@
int chal_reply_h(connection_t *c)
/* Verify the incoming hash with the calculated hash */
if(memcmp(hishash, myhash, c->outdigest->md_size)) {
/* Verify the incoming hash with the calculated hash */
if(memcmp(hishash, myhash, c->outdigest->md_size)) {
- logger(
DEBUG_ALWAYS,
LOG_ERR, _("Possible intruder %s (%s): %s"), c->name,
+ logger(LOG_ERR, _("Possible intruder %s (%s): %s"), c->name,
c->hostname, _("wrong challenge reply"));
c->hostname, _("wrong challenge reply"));
- if
(debug_level >= DEBUG_
SCARY_THINGS) {
+ if
debug(
SCARY_THINGS) {
bin2hex(myhash, hishash, SHA_DIGEST_LENGTH);
hishash[SHA_DIGEST_LENGTH * 2] = '\0';
bin2hex(myhash, hishash, SHA_DIGEST_LENGTH);
hishash[SHA_DIGEST_LENGTH * 2] = '\0';
- logger(
DEBUG_ALWAYS,
LOG_DEBUG, _("Expected challenge reply: %s"), hishash);
+ logger(LOG_DEBUG, _("Expected challenge reply: %s"), hishash);
}
}
- return
-1
;
+ return
false
;
}
/* Identity has now been positively verified.
}
/* Identity has now been positively verified.
@@
-459,12
+446,11
@@
int chal_reply_h(connection_t *c)
return send_ack(c);
}
return send_ack(c);
}
-
int
send_ack(connection_t *c)
+
bool
send_ack(connection_t *c)
{
/* ACK message contains rest of the information the other end needs
to create node_t and edge_t structures. */
{
/* ACK message contains rest of the information the other end needs
to create node_t and edge_t structures. */
- int x;
struct timeval now;
cp();
struct timeval now;
cp();
@@
-472,13
+458,9
@@
int send_ack(connection_t *c)
/* Estimate weight */
gettimeofday(&now, NULL);
/* Estimate weight */
gettimeofday(&now, NULL);
- c->estimated_weight =
- (now.tv_sec - c->start.tv_sec) * 1000 + (now.tv_usec -
- c->start.tv_usec) / 1000;
- x = send_request(c, "%d %s %d %lx", ACK, myport, c->estimated_weight,
- c->options);
+ c->estimated_weight = (now.tv_sec - c->start.tv_sec) * 1000 + (now.tv_usec - c->start.tv_usec) / 1000;
- return
x
;
+ return
send_request(c, "%d %s %d %lx", ACK, myport, c->estimated_weight, c->options)
;
}
static void send_everything(connection_t *c)
}
static void send_everything(connection_t *c)
@@
-491,21
+473,21
@@
static void send_everything(connection_t *c)
/* Send all known subnets and edges */
for(node = node_tree->head; node; node = node->next) {
/* Send all known subnets and edges */
for(node = node_tree->head; node; node = node->next) {
- n =
(node_t *)
node->data;
+ n = node->data;
for(node2 = n->subnet_tree->head; node2; node2 = node2->next) {
for(node2 = n->subnet_tree->head; node2; node2 = node2->next) {
- s =
(subnet_t *)
node2->data;
+ s = node2->data;
send_add_subnet(c, s);
}
for(node2 = n->edge_tree->head; node2; node2 = node2->next) {
send_add_subnet(c, s);
}
for(node2 = n->edge_tree->head; node2; node2 = node2->next) {
- e =
(edge_t *)
node2->data;
+ e = node2->data;
send_add_edge(c, e);
}
}
}
send_add_edge(c, e);
}
}
}
-
int
ack_h(connection_t *c)
+
bool
ack_h(connection_t *c)
{
char hisport[MAX_STRING_SIZE];
char *hisaddress, *dummy;
{
char hisport[MAX_STRING_SIZE];
char *hisaddress, *dummy;
@@
-516,9
+498,9
@@
int ack_h(connection_t *c)
cp();
if(sscanf(c->buffer, "%*d " MAX_STRING " %d %lx", hisport, &weight, &options) != 3) {
cp();
if(sscanf(c->buffer, "%*d " MAX_STRING " %d %lx", hisport, &weight, &options) != 3) {
- logger(
DEBUG_ALWAYS,
LOG_ERR, _("Got bad %s from %s (%s)"), "ACK", c->name,
+ logger(LOG_ERR, _("Got bad %s from %s (%s)"), "ACK", c->name,
c->hostname);
c->hostname);
- return
-1
;
+ return
false
;
}
/* Check if we already have a node_t for him */
}
/* Check if we already have a node_t for him */
@@
-532,9
+514,9
@@
int ack_h(connection_t *c)
} else {
if(n->connection) {
/* Oh dear, we already have a connection to this node. */
} else {
if(n->connection) {
/* Oh dear, we already have a connection to this node. */
-
logger(DEBUG_CONNECTIONS,
LOG_DEBUG, _("Established a second connection with %s (%s), closing old connection"),
+
ifdebug(CONNECTIONS) logger(
LOG_DEBUG, _("Established a second connection with %s (%s), closing old connection"),
n->name, n->hostname);
n->name, n->hostname);
- terminate_connection(n->connection,
0
);
+ terminate_connection(n->connection,
false
);
/* Run graph algorithm to purge key and make sure up/down scripts are rerun with new IP addresses and stuff */
graph();
}
/* Run graph algorithm to purge key and make sure up/down scripts are rerun with new IP addresses and stuff */
graph();
}
@@
-547,9
+529,9
@@
int ack_h(connection_t *c)
/* Activate this connection */
c->allow_request = ALL;
/* Activate this connection */
c->allow_request = ALL;
- c->status.active =
1
;
+ c->status.active =
true
;
-
logger(DEBUG_CONNECTIONS,
LOG_NOTICE, _("Connection with %s (%s) activated"), c->name,
+
ifdebug(CONNECTIONS) logger(
LOG_NOTICE, _("Connection with %s (%s) activated"), c->name,
c->hostname);
/* Send him everything we know */
c->hostname);
/* Send him everything we know */
@@
-580,5
+562,5
@@
int ack_h(connection_t *c)
graph();
graph();
- return
0
;
+ return
true
;
}
}