Fix getaddrinfo() handling in blocking resolver
If getaddrinfo() fails, the first call setting the result will already free
the resolver. Trying to access it afterwards will lead to a warning to
the console from glib. getaddrinfo() shouldn't return NULL for the result
list if it returns successful.
/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* Copyright (C) 2003-2006 Imendio AB
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this program; if not, see <https://www.gnu.org/licenses>
*/
/*
* Description:
* A little program that let you send jabber messages to another person.
*
* Build instructions:
* gcc -o lm-send-async `pkg-config --cflags --libs loudmouth-1.0` lm-send-async.c
*/
#include <stdlib.h>
#include <string.h>
#include <loudmouth/loudmouth.h>
static GMainLoop *main_loop;
static gboolean test_success = FALSE;
static gchar expected_fingerprint[20];
static gchar *server = NULL;
static gint port = 5222;
static gchar *username = NULL;
static gchar *password = NULL;
static gchar *resource = "lm-send-async";
static gchar *recipient = NULL;
static gchar *fingerprint = NULL;
static gchar *message = "test asynchronous message";
static GOptionEntry entries[] =
{
{ "server", 's', 0, G_OPTION_ARG_STRING, &server,
"Server to connect to", NULL },
{ "port", 'P', 0, G_OPTION_ARG_INT, &port,
"Port to connect to [default=5222]", NULL },
{ "username", 'u', 0, G_OPTION_ARG_STRING, &username,
"Username to connect with (user@server.org)", NULL },
{ "password", 'p', 0, G_OPTION_ARG_STRING, &password,
"Password to try", NULL },
{ "resource", 'r', 0, G_OPTION_ARG_STRING, &resource,
"Resource connect with [default=lm-send-async]", NULL },
{ "recipient", 'R', 0, G_OPTION_ARG_STRING, &recipient,
"Recipient to send the message to (e.g. user@server.org)", NULL },
{ "fingerprint", 'f', 0, G_OPTION_ARG_STRING, &fingerprint,
"SSL Fingerprint to use", NULL },
{ "message", 'm', 0, G_OPTION_ARG_STRING, &message,
"Message to send to recipient [default=test message]", NULL },
{ NULL }
};
static gchar *
get_part_name (const gchar *username)
{
const gchar *ch;
g_return_val_if_fail (username != NULL, NULL);
ch = strchr (username, '@');
if (!ch) {
return NULL;
}
return g_strndup (username, ch - username);
}
static void
print_finger (const char *fpr,
unsigned int size)
{
gint i;
for (i = 0; i < size-1; i++) {
g_printerr ("%02X:", fpr[i]);
}
g_printerr ("%02X", fpr[size-1]);
}
static LmSSLResponse
ssl_cb (LmSSL *ssl,
LmSSLStatus status,
gpointer ud)
{
g_print ("LmSendAsync: SSL status:%d\n", status);
switch (status) {
case LM_SSL_STATUS_NO_CERT_FOUND:
g_printerr ("LmSendAsync: No certificate found!\n");
break;
case LM_SSL_STATUS_UNTRUSTED_CERT:
g_printerr ("LmSendAsync: Certificate is not trusted!\n");
break;
case LM_SSL_STATUS_CERT_EXPIRED:
g_printerr ("LmSendAsync: Certificate has expired!\n");
break;
case LM_SSL_STATUS_CERT_NOT_ACTIVATED:
g_printerr ("LmSendAsync: Certificate has not been activated!\n");
break;
case LM_SSL_STATUS_CERT_HOSTNAME_MISMATCH:
g_printerr ("LmSendAsync: Certificate hostname does not match expected hostname!\n");
break;
case LM_SSL_STATUS_CERT_FINGERPRINT_MISMATCH: {
const char *fpr = lm_ssl_get_fingerprint (ssl);
g_printerr ("LmSendAsync: Certificate fingerprint does not match expected fingerprint!\n");
g_printerr ("LmSendAsync: Remote fingerprint: ");
print_finger (fpr, 16);
g_printerr ("\n"
"LmSendAsync: Expected fingerprint: ");
print_finger (expected_fingerprint, 16);
g_printerr ("\n");
break;
}
case LM_SSL_STATUS_GENERIC_ERROR:
g_printerr ("LmSendAsync: Generic SSL error!\n");
break;
}
return LM_SSL_RESPONSE_CONTINUE;
}
static void
connection_auth_cb (LmConnection *connection,
gboolean success,
gpointer user_data)
{
if (success) {
GError *error = NULL;
LmMessage *m;
g_print ("LmSendAsync: Authenticated successfully\n");
m = lm_message_new (recipient, LM_MESSAGE_TYPE_MESSAGE);
lm_message_node_add_child (m->node, "body", message);
if (!lm_connection_send (connection, m, &error)) {
g_printerr ("LmSendAsync: Failed to send message:'%s'\n",
lm_message_node_to_string (m->node));
} else {
g_print ("LmSendAsync: Sent message:'%s'\n",
lm_message_node_to_string (m->node));
test_success = TRUE;
}
lm_message_unref (m);
} else {
g_printerr ("LmSendAsync: Failed to authenticate\n");
}
lm_connection_close (connection, NULL);
g_main_loop_quit (main_loop);
}
static void
connection_open_cb (LmConnection *connection,
gboolean success,
gpointer user_data)
{
if (success) {
gchar *user;
user = get_part_name (username);
if (!lm_connection_authenticate (connection, user,
password, resource,
connection_auth_cb,
NULL, FALSE, NULL)) {
g_free (user);
g_printerr ("LmSendAsync: Failed to send authentication\n");
g_main_loop_quit (main_loop);
return;
}
g_free (user);
g_print ("LmSendAsync: Sent authentication message\n");
} else {
g_printerr ("LmSendAsync: Failed to connect\n");
g_main_loop_quit (main_loop);
}
}
int
main (int argc, char **argv)
{
GMainContext *main_context;
GOptionContext *context;
LmConnection *connection;
context = g_option_context_new ("- test send message asynchronously");
g_option_context_add_main_entries (context, entries, NULL);
g_option_context_parse (context, &argc, &argv, NULL);
g_option_context_free (context);
if (!username || !password || !recipient) {
g_printerr ("For usage, try %s --help\n", argv[0]);
return EXIT_FAILURE;
}
if (username && strchr (username, '@') == NULL) {
g_printerr ("LmSendAsync: Username must have an '@' included\n");
return EXIT_FAILURE;
}
main_context = g_main_context_new ();
connection = lm_connection_new_with_context (server, main_context);
lm_connection_set_port (connection, port);
lm_connection_set_jid (connection, username);
if (fingerprint) {
LmSSL *ssl;
char *p;
int i;
if (port == LM_CONNECTION_DEFAULT_PORT) {
lm_connection_set_port (connection,
LM_CONNECTION_DEFAULT_PORT_SSL);
}
for (i = 0, p = fingerprint; *p && *(p+1); i++, p += 3) {
expected_fingerprint[i] = (unsigned char) g_ascii_strtoull (p, NULL, 16);
}
ssl = lm_ssl_new (expected_fingerprint,
(LmSSLFunction) ssl_cb,
NULL, NULL);
lm_ssl_use_starttls (ssl, TRUE, FALSE);
lm_connection_set_ssl (connection, ssl);
lm_ssl_unref (ssl);
}
if (!lm_connection_open (connection,
(LmResultFunction) connection_open_cb,
NULL, NULL, NULL)) {
g_printerr ("LmSendAsync: Could not open a connection\n");
return EXIT_FAILURE;
}
main_loop = g_main_loop_new (main_context, FALSE);
g_main_loop_run (main_loop);
return (test_success ? EXIT_SUCCESS : EXIT_FAILURE);
}