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/* pacrunner-duktape.c
*
* Copyright 2022-2023 The Libproxy Team
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* SPDX-License-Identifier: LGPL-2.1-or-later
*/
#include <gio/gio.h>
#include <unistd.h>
#ifdef __WIN32__
#include <ws2tcpip.h>
#else
#include <netdb.h>
#endif
#include "pacrunner-duktape.h"
#include "pacutils.h"
#include "px-plugin-pacrunner.h"
#include "duktape.h"
struct _PxPacRunnerDuktape {
GObject parent_instance;
duk_context *ctx;
};
static void px_pacrunner_iface_init (PxPacRunnerInterface *iface);
G_DEFINE_FINAL_TYPE_WITH_CODE (PxPacRunnerDuktape,
px_pacrunner_duktape,
G_TYPE_OBJECT,
G_IMPLEMENT_INTERFACE (PX_TYPE_PACRUNNER, px_pacrunner_iface_init))
static duk_ret_t
dns_resolve (duk_context *ctx)
{
const char *hostname = NULL;
struct addrinfo *info;
char tmp[INET6_ADDRSTRLEN + 1];
if (duk_get_top (ctx) != 1) {
/* Invalid number of arguments */
return 0;
}
/* We do not need to free the string - It's managed by Duktape. */
hostname = duk_get_string (ctx, 0);
if (!hostname)
return 0;
/* Look it up */
if (getaddrinfo (hostname, NULL, NULL, &info))
return 0;
/* Try for IPv4 */
if (getnameinfo (info->ai_addr,
info->ai_addrlen,
tmp,
INET6_ADDRSTRLEN + 1,
NULL,
0,
NI_NUMERICHOST)) {
freeaddrinfo (info);
duk_push_null (ctx);
return 1;
}
freeaddrinfo (info);
/* Create the return value */
duk_push_string (ctx, tmp);
return 1;
}
static duk_ret_t
my_ip_address (duk_context *ctx)
{
char hostname[1024];
hostname[sizeof (hostname) - 1] = '\0';
if (!gethostname (hostname, sizeof (hostname) - 1)) {
duk_push_string (ctx, hostname);
return dns_resolve (ctx);
}
return duk_error (ctx, DUK_ERR_ERROR, "Unable to find hostname!");
}
static void
px_pacrunner_duktape_init (PxPacRunnerDuktape *self)
{
self->ctx = duk_create_heap_default ();
if (!self->ctx)
return;
duk_push_c_function (self->ctx, dns_resolve, 1);
duk_put_global_string (self->ctx, "dnsResolve");
duk_push_c_function (self->ctx, my_ip_address, 1);
duk_put_global_string (self->ctx, "myIpAddress");
duk_push_string (self->ctx, JAVASCRIPT_ROUTINES);
if (duk_peval_noresult (self->ctx))
goto error;
return;
error:
duk_destroy_heap (self->ctx);
}
static void
px_pacrunner_duktape_dispose (GObject *object)
{
PxPacRunnerDuktape *self = PX_PACRUNNER_DUKTAPE (object);
g_clear_pointer (&self->ctx, duk_destroy_heap);
G_OBJECT_CLASS (px_pacrunner_duktape_parent_class)->dispose (object);
}
static void
px_pacrunner_duktape_class_init (PxPacRunnerDuktapeClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
object_class->dispose = px_pacrunner_duktape_dispose;
}
static gboolean
px_pacrunner_duktape_set_pac (PxPacRunner *pacrunner,
GBytes *pac_data)
{
PxPacRunnerDuktape *self = PX_PACRUNNER_DUKTAPE (pacrunner);
gsize len;
gconstpointer content = g_bytes_get_data (pac_data, &len);
duk_push_lstring (self->ctx, content, len);
if (duk_peval_noresult (self->ctx)) {
return FALSE;
}
return TRUE;
}
static char *
px_pacrunner_duktape_run (PxPacRunner *pacrunner,
GUri *uri)
{
PxPacRunnerDuktape *self = PX_PACRUNNER_DUKTAPE (pacrunner);
duk_int_t result;
duk_get_global_string (self->ctx, "FindProxyForURL");
duk_push_string (self->ctx, g_uri_to_string (uri));
duk_push_string (self->ctx, g_uri_get_host (uri));
result = duk_pcall (self->ctx, 2);
if (result == 0) {
const char *proxy = duk_get_string (self->ctx, 0);
char *proxy_string;
if (!proxy) {
duk_pop (self->ctx);
return g_strdup ("");
}
proxy_string = g_strdup (proxy);
duk_pop (self->ctx);
return proxy_string;
}
duk_pop (self->ctx);
return g_strdup ("");
}
static void
px_pacrunner_iface_init (PxPacRunnerInterface *iface)
{
iface->set_pac = px_pacrunner_duktape_set_pac;
iface->run = px_pacrunner_duktape_run;
}
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