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/*
*
* PACrunner - Proxy configuration daemon
*
* Copyright (C) 2010-2011 Intel Corporation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This program 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 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <errno.h>
#include <unistd.h>
#include <string.h>
#include <pthread.h>
#include <netdb.h>
#pragma GCC diagnostic ignored "-Wredundant-decls"
#pragma GCC diagnostic ignored "-Winvalid-offsetof"
#include <jsapi.h>
#pragma GCC diagnostic error "-Wredundant-decls"
#pragma GCC diagnostic error "-Winvalid-offsetof"
extern "C" {
#include "pacrunner.h"
#include "js.h"
}
static pthread_mutex_t mozjs_mutex = PTHREAD_MUTEX_INITIALIZER;
struct pacrunner_mozjs {
struct pacrunner_proxy *proxy;
JSContext *jsctx;
JSObject *jsobj;
JSAutoCompartment *jsac;
};
static bool myipaddress(JSContext *jsctx, unsigned argc, jsval *vp)
{
struct pacrunner_mozjs *ctx = (pacrunner_mozjs *)JS_GetContextPrivate(jsctx);
char address[NI_MAXHOST];
DBG("");
JS::CallArgs args = JS::CallArgsFromVp(argc, vp);
args.rval().setNull();
if (!ctx)
return true;
if (__pacrunner_js_getipaddr(ctx->proxy, address, sizeof(address)) < 0)
return true;
DBG("address %s", address);
args.rval().setString(JS_NewStringCopyZ(jsctx,address));
return true;
}
static bool dnsresolve(JSContext *jsctx, unsigned argc, jsval *vp)
{
struct pacrunner_mozjs *ctx = (pacrunner_mozjs *)JS_GetContextPrivate(jsctx);
char address[NI_MAXHOST];
JS::CallArgs args = JS::CallArgsFromVp(argc,vp);
char * host = JS_EncodeString(jsctx, args[0].toString());
DBG("host %s", host);
if (!ctx)
goto out;
if (__pacrunner_js_resolve(ctx->proxy, host, address, sizeof(address)) < 0)
goto out;
DBG("address %s", address);
args.rval().setString(JS_NewStringCopyZ(jsctx,address));
out:
JS_free(jsctx, host);
return true;
}
static JSClass jscls = {
"global", JSCLASS_GLOBAL_FLAGS,
};
static JSRuntime *jsrun;
static int create_object(struct pacrunner_proxy *proxy)
{
struct pacrunner_mozjs *ctx;
const char *script;
script = pacrunner_proxy_get_script(proxy);
if (!script)
return 0;
ctx = (pacrunner_mozjs *)g_malloc0(sizeof(struct pacrunner_mozjs));
ctx->proxy = proxy;
ctx->jsctx = JS_NewContext(jsrun, 8 * 1024);
if (!ctx->jsctx) {
g_free(ctx);
return -ENOMEM;
}
JS_SetContextPrivate(ctx->jsctx, ctx);
__pacrunner_proxy_set_jsctx(proxy, ctx);
JS::CompartmentOptions compart_opts;
compart_opts.setVersion(JSVERSION_LATEST);
ctx->jsobj = JS_NewGlobalObject(ctx->jsctx, &jscls, nullptr,
JS::DontFireOnNewGlobalHook, compart_opts);
JS::RootedObject jsobj(ctx->jsctx,ctx->jsobj);
ctx->jsac = new JSAutoCompartment(ctx->jsctx, jsobj);
if (!JS_InitStandardClasses(ctx->jsctx, jsobj))
pacrunner_error("Failed to init JS standard classes");
JS_DefineFunction(ctx->jsctx, jsobj, "myIpAddress", myipaddress, 0, 0);
JS_DefineFunction(ctx->jsctx, jsobj, "dnsResolve", dnsresolve, 1, 0);
JS::RootedValue rval(ctx->jsctx);
JS::CompileOptions opts(ctx->jsctx);
opts.setIntroductionType("pacrunner")
.setUTF8(true)
.setCompileAndGo(true);
JS::Evaluate(ctx->jsctx, JS::HandleObject(jsobj), opts,
__pacrunner_js_routines, strlen(__pacrunner_js_routines)
, &rval);
JS::Evaluate(ctx->jsctx, jsobj, opts, script, strlen(script), &rval);
return 0;
}
static int mozjs_clear_proxy(struct pacrunner_proxy *proxy)
{
struct pacrunner_mozjs *ctx = (pacrunner_mozjs *)__pacrunner_proxy_get_jsctx(proxy);
DBG("proxy %p ctx %p", proxy, ctx);
if (!ctx)
return -EINVAL;
delete ctx->jsac;
JS_DestroyContext(ctx->jsctx);
__pacrunner_proxy_set_jsctx(proxy, NULL);
g_free(ctx);
return 0;
}
static int mozjs_set_proxy(struct pacrunner_proxy *proxy)
{
DBG("proxy %p", proxy);
if (!proxy)
return 0;
mozjs_clear_proxy(proxy);
return create_object(proxy);
}
static char * mozjs_execute(struct pacrunner_proxy *proxy, const char *url,
const char *host)
{
struct pacrunner_mozjs *ctx = (pacrunner_mozjs *)__pacrunner_proxy_get_jsctx(proxy);
bool result;
char *answer, *g_answer;
DBG("proxy %p ctx %p url %s host %s", proxy, ctx, url, host);
if (!ctx)
return NULL;
pthread_mutex_lock(&mozjs_mutex);
JS_BeginRequest(ctx->jsctx);
JS::RootedValue rval(ctx->jsctx);
JS::AutoValueArray<2> args(ctx->jsctx);
args[0].setString(JS_NewStringCopyZ(ctx->jsctx, url));
args[1].setString(JS_NewStringCopyZ(ctx->jsctx, host));
JS::RootedObject jsobj(ctx->jsctx,ctx->jsobj);
result = JS_CallFunctionName(ctx->jsctx, jsobj, "FindProxyForURL", args , &rval);
JS_EndRequest(ctx->jsctx);
JS_MaybeGC(ctx->jsctx);
pthread_mutex_unlock(&mozjs_mutex);
if (result) {
answer = JS_EncodeString(ctx->jsctx, rval.toString());
g_answer = g_strdup(answer);
JS_free(ctx->jsctx, answer);
return g_answer;
}
return NULL;
}
static struct pacrunner_js_driver mozjs_driver = {
.name = "mozjs",
.priority = PACRUNNER_JS_PRIORITY_DEFAULT,
.set_proxy = mozjs_set_proxy,
.clear_proxy = mozjs_clear_proxy,
.execute = mozjs_execute,
};
static int mozjs_init(void)
{
DBG("");
JS_Init();
jsrun = JS_NewRuntime(JS::DefaultHeapMaxBytes, 8 * 1024 * 1024 );
return pacrunner_js_driver_register(&mozjs_driver);
}
static void mozjs_exit(void)
{
DBG("");
pacrunner_js_driver_unregister(&mozjs_driver);
JS_DestroyRuntime(jsrun);
JS_ShutDown();
}
PACRUNNER_PLUGIN_DEFINE(mozjs, mozjs_init, mozjs_exit)
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