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Avoid direct use of libproxy

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Since hexchat already depends on GLib, it's better to use GProxyResolver
instead. This might use libproxy, or not, as appropriate.

P.S. This removes a memory safety issue because proxy_list is allocated
using malloc(), not g_malloc(), and therefore using g_strfreev() is
incorrect. The proper way to free the proxy list returned by libproxy
is to use px_proxy_factory_free_proxies() (but nobody does that because
it was added in libproxy 0.4.16, which is somewhat recent).
This commit is contained in:
Michael Catanzaro
2021-07-12 08:38:02 -05:00
committed by Patrick
parent 869a8d7ab3
commit 25440a07c3
6 changed files with 16 additions and 36 deletions
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26
src/common/server.c
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@@ -61,10 +61,6 @@
#include "ssl.h"
#endif
#ifdef USE_LIBPROXY
#include <proxy.h>
#endif
#ifdef USE_OPENSSL
/* local variables */
static struct session *g_sess = NULL;
@@ -78,9 +74,15 @@ static void server_disconnect (session * sess, int sendquit, int err);
static int server_cleanup (server * serv);
static void server_connect (server *serv, char *hostname, int port, int no_login);
#ifdef USE_LIBPROXY
extern pxProxyFactory *libproxy_factory;
#endif
static void
write_error (char *message, GError **error)
{
if (error == NULL || *error == NULL) {
return;
}
g_printerr ("%s: %s\n", message, (*error)->message);
g_clear_error (error);
}
/* actually send to the socket. This might do a character translation or
send via SSL. server/dcc both use this function. */
@@ -1392,14 +1394,16 @@ server_child (server * serv)
if (!serv->dont_use_proxy) /* blocked in serverlist? */
{
#ifdef USE_LIBPROXY
if (prefs.hex_net_proxy_type == 5)
{
char **proxy_list;
char *url, *proxy;
GProxyResolver *resolver;
GError *error = NULL;
resolver = g_proxy_resolver_get_default ();
url = g_strdup_printf ("irc://%s:%d", hostname, port);
proxy_list = px_proxy_factory_get_proxies (libproxy_factory, url);
proxy_list = g_proxy_resolver_lookup (resolver, url, NULL, &error);
if (proxy_list) {
/* can use only one */
@@ -1412,6 +1416,8 @@ server_child (server * serv)
proxy_type = 3;
else if (!strncmp (proxy, "socks", 5))
proxy_type = 2;
} else {
write_error ("Failed to lookup proxy", &error);
}
if (proxy_type) {
@@ -1426,7 +1432,7 @@ server_child (server * serv)
g_strfreev (proxy_list);
g_free (url);
}
#endif
if (prefs.hex_net_proxy_host[0] &&
prefs.hex_net_proxy_type > 0 &&
prefs.hex_net_proxy_use != 2) /* proxy is NOT dcc-only */