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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 <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netdb.h>
#include <arpa/inet.h>
#define __USE_BSD
#include <unistd.h>
#include <misc.h>
#include <proxy_factory.h>
#include <JavaScriptCore/JavaScript.h>
#include "pacutils.h"
static char *jstr2str(JSStringRef str, bool release)
{
char *tmp = px_malloc0(JSStringGetMaximumUTF8CStringSize(str)+1);
JSStringGetUTF8CString(str, tmp, JSStringGetMaximumUTF8CStringSize(str)+1);
if (release) JSStringRelease(str);
return tmp;
}
static JSValueRef dnsResolve(JSContextRef ctx, JSObjectRef func, JSObjectRef self, size_t argc, const JSValueRef argv[], JSValueRef* exception)
{
if (argc != 1) return NULL;
if (!JSValueIsString(ctx, argv[0])) return NULL;
// Get hostname argument
char *tmp = jstr2str(JSValueToStringCopy(ctx, argv[0], NULL), true);
// Look it up
struct addrinfo *info;
if (getaddrinfo(tmp, NULL, NULL, &info))
return NULL;
px_free(tmp);
// Try for IPv4
tmp = px_malloc0(INET6_ADDRSTRLEN+1);
if (!inet_ntop(info->ai_family,
&((struct sockaddr_in *) info->ai_addr)->sin_addr,
tmp, INET_ADDRSTRLEN+1) > 0)
// Try for IPv6
if (!inet_ntop(info->ai_family,
&((struct sockaddr_in6 *) info->ai_addr)->sin6_addr,
tmp, INET6_ADDRSTRLEN+1) > 0)
{
freeaddrinfo(info);
px_free(tmp);
return NULL;
}
freeaddrinfo(info);
// Create the return value
JSStringRef str = JSStringCreateWithUTF8CString(tmp);
JSValueRef ret = JSValueMakeString(ctx, str);
JSStringRelease(str);
px_free(tmp);
return ret;
}
static JSValueRef myIpAddress(JSContextRef ctx, JSObjectRef func, JSObjectRef self, size_t argc, const JSValueRef argv[], JSValueRef* exception)
{
char hostname[1024];
if (!gethostname(hostname, 1023)) {
JSStringRef str = JSStringCreateWithUTF8CString(hostname);
JSValueRef val = JSValueMakeString(ctx, str);
JSStringRelease(str);
JSValueRef ip = dnsResolve(ctx, func, self, 1, &val, NULL);
return ip;
}
return NULL;
}
typedef struct {
JSGlobalContextRef ctx;
char *pac;
} ctxStore;
static void ctxs_free(ctxStore *self)
{
if (!self) return;
JSGlobalContextRelease(self->ctx);
JSGarbageCollect(self->ctx);
px_free(self->pac);
px_free(self);
}
static ctxStore *ctxs_new(pxPAC *pac)
{
JSStringRef str = NULL;
JSObjectRef func = NULL;
// Create the basic context
ctxStore *self = px_malloc0(sizeof(ctxStore));
self->pac = px_strdup(px_pac_to_string(pac));
if (!(self->ctx = JSGlobalContextCreate(NULL))) goto error;
// Add dnsResolve into the context
str = JSStringCreateWithUTF8CString("dnsResolve");
func = JSObjectMakeFunctionWithCallback(self->ctx, str, dnsResolve);
JSObjectSetProperty(self->ctx, JSContextGetGlobalObject(self->ctx), str, func, kJSPropertyAttributeNone, NULL);
JSStringRelease(str);
// Add myIpAddress into the context
str = JSStringCreateWithUTF8CString("myIpAddress");
func = JSObjectMakeFunctionWithCallback(self->ctx, str, myIpAddress);
JSObjectSetProperty(self->ctx, JSContextGetGlobalObject(self->ctx), str, func, kJSPropertyAttributeNone, NULL);
JSStringRelease(str);
// Add all other routines into the context
str = JSStringCreateWithUTF8CString(JAVASCRIPT_ROUTINES);
if (!JSCheckScriptSyntax(self->ctx, str, NULL, 0, NULL)) goto error;
JSEvaluateScript(self->ctx, str, NULL, NULL, 1, NULL);
JSStringRelease(str);
// Add the PAC into the context
str = JSStringCreateWithUTF8CString(self->pac);
if (!JSCheckScriptSyntax(self->ctx, str, NULL, 0, NULL)) goto error;
JSEvaluateScript(self->ctx, str, NULL, NULL, 1, NULL);
JSStringRelease(str);
return self;
error:
if (str) JSStringRelease(str);
ctxs_free(self);
return NULL;
}
char *webkit_pacrunner(pxProxyFactory *self, pxPAC *pac, pxURL *url)
{
JSStringRef str = NULL;
JSValueRef val = NULL;
char *tmp = NULL;
// Make sure we have the pac file and url
if (!pac) return NULL;
if (!url) return NULL;
if (!px_pac_to_string(pac) && !px_pac_reload(pac)) return NULL;
// Get the cached context
ctxStore *ctxs = px_proxy_factory_misc_get(self, "webkit");
// If there is a cached context, make sure it is the same pac
if (ctxs && strcmp(ctxs->pac, px_pac_to_string(pac)))
{
ctxs_free(ctxs);
ctxs = NULL;
}
// If no context exists (or if the pac was changed), create one
if (!ctxs)
{
if ((ctxs = ctxs_new(pac)))
px_proxy_factory_misc_set(self, "webkit", ctxs);
else
return NULL;
}
// Run the PAC
tmp = px_strcat("FindProxyForURL(\"", px_url_to_string(url), "\", \"", px_url_get_host(url), "\");", NULL);
str = JSStringCreateWithUTF8CString(tmp);
px_free(tmp); tmp = NULL;
if (!JSCheckScriptSyntax(ctxs->ctx, str, NULL, 0, NULL)) goto error;
if (!(val = JSEvaluateScript(ctxs->ctx, str, NULL, NULL, 1, NULL))) goto error;
if (!JSValueIsString(ctxs->ctx, val)) goto error;
JSStringRelease(str);
// Convert the return value to a string
return jstr2str(JSValueToStringCopy(ctxs->ctx, val, NULL), true);
error:
if (str) JSStringRelease(str);
ctxs_free(ctxs);
return tmp;
}
bool on_proxy_factory_instantiate(pxProxyFactory *self)
{
return px_proxy_factory_pac_runner_set(self, webkit_pacrunner);
}
void on_proxy_factory_destantiate(pxProxyFactory *self)
{
px_proxy_factory_pac_runner_set(self, NULL);
ctxs_free(px_proxy_factory_misc_get(self, "webkit"));
px_proxy_factory_misc_set(self, "webkit", NULL);
}
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