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/*******************************************************************************
* libproxy - A library for proxy configuration
* Copyright (C) 2006 Nathaniel McCallum <nathaniel@natemccallum.com>
*
* 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
******************************************************************************/
#include <cstring> // ?
#include "../extension_pacrunner.hpp"
using namespace libproxy;
// Work around a mozjs include bug
#ifndef JS_HAS_FILE_OBJECT
#define JS_HAS_FILE_OBJECT 0
#endif
#ifdef WIN32
#ifndef XP_WIN
#define XP_WIN
#endif
#endif
#include <jsapi.h>
#include "pacutils.h"
#ifndef INET_ADDRSTRLEN
#define INET_ADDRSTRLEN 16
#endif
#ifndef INET6_ADDRSTRLEN
#define INET6_ADDRSTRLEN 46
#endif
static JSBool dnsResolve_(JSContext *cx, jsval hostname, jsval *vp) {
// Get hostname argument
char *tmp = JS_EncodeString(cx, JS_ValueToString(cx, hostname));
// Set the default return value
JS_SET_RVAL(cx, vp, JSVAL_NULL);
// Look it up
struct addrinfo *info = NULL;
if (getaddrinfo(tmp, NULL, NULL, &info))
goto out;
// Allocate the IP address
JS_free(cx, tmp);
tmp = (char *) JS_malloc(cx, INET6_ADDRSTRLEN+1);
memset(tmp, 0, INET6_ADDRSTRLEN+1);
// Try for IPv4 and IPv6
if (getnameinfo(info->ai_addr, info->ai_addrlen,
tmp, INET6_ADDRSTRLEN+1,
NULL, 0,
NI_NUMERICHOST)) goto out;
// We succeeded
JS_SET_RVAL(cx, vp, STRING_TO_JSVAL(JS_NewStringCopyN(cx, tmp, strlen(tmp))));
tmp = NULL;
out:
if (info) freeaddrinfo(info);
JS_free(cx, tmp);
return true;
}
static JSBool dnsResolve(JSContext *cx, uintN /*argc*/, jsval *vp) {
jsval *argv = JS_ARGV(cx, vp);
return dnsResolve_(cx, argv[0], vp);
}
static JSBool myIpAddress(JSContext *cx, uintN /*argc*/, jsval *vp) {
char *hostname = (char *) JS_malloc(cx, 1024);
if (!gethostname(hostname, 1023)) {
JSString *myhost = JS_NewStringCopyN(cx, hostname, strlen(hostname));
jsval arg = STRING_TO_JSVAL(myhost);
return dnsResolve_(cx, 1, &arg);
}
JS_free(cx, hostname);
JS_SET_RVAL(cx, vp, JSVAL_NULL);
return true;
}
// Setup Javascript global class
// This MUST be a static global
static JSClass cls = {
"global", JSCLASS_GLOBAL_FLAGS,
JS_PropertyStub, JS_PropertyStub, JS_PropertyStub, JS_StrictPropertyStub,
JS_EnumerateStub, JS_ResolveStub, JS_ConvertStub, JS_FinalizeStub,
NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL
};
class mozjs_pacrunner : public pacrunner {
public:
mozjs_pacrunner(string pac, const url& pacurl) throw (bad_alloc) : pacrunner(pac, pacurl) {
jsval rval;
// Set defaults
this->jsrun = NULL;
this->jsctx = NULL;
// Initialize Javascript runtime environment
if (!(this->jsrun = JS_NewRuntime(1024 * 1024))) goto error;
if (!(this->jsctx = JS_NewContext(this->jsrun, 1024 * 1024))) goto error;
//JS_SetOptions(this->jsctx, JSOPTION_VAROBJFIX);
//JS_SetVersion(this->jsctx, JSVERSION_LATEST);
//JS_SetErrorReporter(cx, reportError);
if (!(this->jsglb = JS_NewCompartmentAndGlobalObject(this->jsctx, &cls, NULL))) goto error;
if (!JS_InitStandardClasses(this->jsctx, this->jsglb)) goto error;
// Define Javascript functions
JS_DefineFunction(this->jsctx, this->jsglb, "dnsResolve", dnsResolve, 1, 0);
JS_DefineFunction(this->jsctx, this->jsglb, "myIpAddress", myIpAddress, 0, 0);
JS_EvaluateScript(this->jsctx, this->jsglb, JAVASCRIPT_ROUTINES,
strlen(JAVASCRIPT_ROUTINES), "pacutils.js", 0, &rval);
// Add PAC to the environment
JS_EvaluateScript(this->jsctx, this->jsglb, pac.c_str(),
strlen(pac.c_str()), pacurl.to_string().c_str(), 0, &rval);
return;
error:
if (this->jsctx) JS_DestroyContext(this->jsctx);
if (this->jsrun) JS_DestroyRuntime(this->jsrun);
throw bad_alloc();
}
~mozjs_pacrunner() {
if (this->jsctx) JS_DestroyContext(this->jsctx);
if (this->jsrun) JS_DestroyRuntime(this->jsrun);
// JS_ShutDown()?
}
string run(const url& url_) throw (bad_alloc) {
// Build arguments to the FindProxyForURL() function
char *tmpurl = JS_strdup(this->jsctx, url_.to_string().c_str());
char *tmphost = JS_strdup(this->jsctx, url_.get_host().c_str());
if (!tmpurl || !tmphost) {
if (tmpurl) JS_free(this->jsctx, tmpurl);
if (tmphost) JS_free(this->jsctx, tmphost);
throw bad_alloc();
}
jsval args[2] = {
STRING_TO_JSVAL(JS_NewStringCopyN(this->jsctx, tmpurl, strlen(tmpurl))),
STRING_TO_JSVAL(JS_NewStringCopyN(this->jsctx, tmphost, strlen(tmphost)))
};
// Find the proxy (call FindProxyForURL())
jsval rval;
JSBool result = JS_CallFunctionName(this->jsctx, this->jsglb, "FindProxyForURL", 2, args, &rval);
if (!result) return "";
char * tmpanswer = JS_EncodeString(this->jsctx, JS_ValueToString(this->jsctx, rval));
string answer = string(tmpanswer);
JS_free(this->jsctx, tmpanswer);
if (answer == "undefined") return "";
return answer;
}
private:
JSRuntime *jsrun;
JSContext *jsctx;
JSObject *jsglb;
};
PX_PACRUNNER_MODULE_EZ(mozjs, "JS_DefineFunction", "mozjs");
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