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/*
* Copyright (C) 2013 Martin Willi
* Copyright (C) 2013 revosec AG
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
*
* 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.
*/
#import "Control.h"
#import "Helper.h"
@implementation Control {
/* Provides the XPC main connection to the privileged helper */
Helper *helper;
/* active connection specific XPC channels, indexed by connection name */
NSDictionary *active;
/* delegate to invoke callbacks on */
id<ControlDelegate> del;
}
- (NSString*)translateAlert:(const char*)alert
{
if (strcmp(alert, "local-auth") == 0)
{
return @"Client authentication failed";
}
if (strcmp(alert, "remote-auth") == 0)
{
return @"Server authentication failed";
}
if (strcmp(alert, "dns") == 0)
{
return @"Resolving server hostname failed";
}
if (strcmp(alert, "unreachable") == 0)
{
return @"Server is unreachable";
}
if (strcmp(alert, "timeout") == 0)
{
return @"Server did not respond";
}
if (strcmp(alert, "proposal-mismatch") == 0)
{
return @"No common cryptographic algorithms found";
}
if (strcmp(alert, "ts-mismatch") == 0)
{
return @"No common traffic selectors found";
}
return NULL;
}
- (void)changeState:(connectionState)state withChannel:(xpc_connection_t)channel
andConn:(NSDictionary*)conn
{
NSString *name;
name = [conn objectForKey:@"name"];
switch (state)
{
case STATE_WORKING:
xpc_dictionary_set_value(active, [name UTF8String], channel);
break;
case STATE_DOWN:
xpc_dictionary_set_value(active, [name UTF8String], NULL);
break;
case STATE_UP:
break;
}
dispatch_sync(dispatch_get_main_queue(), ^{
[del change:state withConnection:conn];
});
}
- (void)handleEvent:(xpc_object_t)request withChannel:(xpc_connection_t)channel
andConn:(NSDictionary*)conn
{
xpc_connection_t client;
xpc_object_t reply;
const char *type, *rpc, *event;
client = xpc_dictionary_get_remote_connection(request);
type = xpc_dictionary_get_string(request, "type");
if (type)
{
if (strcmp(type, "rpc") == 0)
{
reply = xpc_dictionary_create_reply(request);
rpc = xpc_dictionary_get_string(request, "rpc");
if (rpc)
{
if (strcmp(rpc, "get_password") == 0)
{
__block NSString *password;
dispatch_sync(dispatch_get_main_queue(), ^{
password = [del createPasswordWithConnection:conn];
});
xpc_dictionary_set_string(reply, "password",
[password UTF8String]);
[password release];
}
}
xpc_connection_send_message(client, reply);
xpc_release(reply);
}
if (strcmp(type, "event") == 0)
{
event = xpc_dictionary_get_string(request, "event");
if (event)
{
if (strcmp(event, "log") == 0)
{
NSString *line;
line = [[NSString alloc] initWithUTF8String:
xpc_dictionary_get_string(request, "message")];
dispatch_async(dispatch_get_main_queue(), ^{
[del log:line withConnection:conn];
});
[line release];
}
if (strcmp(event, "alert") == 0)
{
NSString *msg;
const char *str;
str = xpc_dictionary_get_string(request, "alert");
if (str)
{
msg = [self translateAlert:str];
if (msg)
{
dispatch_async(dispatch_get_main_queue(), ^{
[del raise:msg withConnection:conn];
});
}
}
}
if (strcmp(event, "connecting") == 0)
{
[self changeState:STATE_WORKING withChannel:channel andConn:conn];
}
if (strcmp(event, "up") == 0)
{
/* IKE_SA up */
}
if (strcmp(event, "down") == 0)
{
[self changeState:STATE_DOWN withChannel:channel andConn:conn];
}
if (strcmp(event, "child_up") == 0)
{
[self changeState:STATE_UP withChannel:channel andConn:conn];
}
if (strcmp(event, "child_down") == 0)
{
[self changeState:STATE_DOWN withChannel:channel andConn:conn];
}
}
}
}
}
- (void)connect:(NSDictionary*)conn
{
xpc_object_t request;
xpc_connection_t service, daemon;
NSString *name, *server, *username;
name = [conn objectForKey:@"name"];
server = [conn objectForKey:@"server"];
username = [conn objectForKey:@"username"];
daemon = [helper getConnection];
if (!daemon)
{
[del raise:[helper getError] withConnection:conn];
}
request = xpc_dictionary_create(NULL, NULL, 0);
xpc_dictionary_set_string(request, "type", "rpc");
xpc_dictionary_set_string(request, "rpc", "start_connection");
xpc_dictionary_set_string(request, "name", [name UTF8String]);
xpc_dictionary_set_string(request, "host", [server UTF8String]);
xpc_dictionary_set_string(request, "id", [username UTF8String]);
service = xpc_connection_create(NULL, NULL);
xpc_connection_set_event_handler(service, ^(xpc_object_t channel) {
xpc_connection_set_event_handler(channel, ^(xpc_object_t event) {
if (event == XPC_ERROR_CONNECTION_INTERRUPTED ||
event == XPC_ERROR_CONNECTION_INVALID)
{
xpc_dictionary_set_value(active, [name UTF8String], NULL);
dispatch_sync(dispatch_get_main_queue(), ^{
[del change:STATE_DOWN withConnection:conn];
});
}
else
{
[self handleEvent:event withChannel:channel andConn:conn];
}
});
xpc_connection_resume(channel);
});
xpc_connection_resume(service);
xpc_dictionary_set_connection(request, "channel", xpc_retain(service));
xpc_connection_send_message_with_reply(daemon, request,
dispatch_get_main_queue(),
^(xpc_object_t reply) {});
xpc_release(request);
}
- (void)disconnect:(NSDictionary*)conn
{
xpc_connection_t tunnel;
xpc_object_t request;
tunnel = xpc_dictionary_get_value(active,
[[conn objectForKey:@"name"] UTF8String]);
if (tunnel)
{
request = xpc_dictionary_create(NULL, NULL, 0);
xpc_dictionary_set_string(request, "type", "rpc");
xpc_dictionary_set_string(request, "rpc", "stop_connection");
xpc_connection_send_message_with_reply(tunnel, request,
dispatch_get_main_queue(),
^(xpc_object_t reply) {});
xpc_release(request);
}
}
- (void)dealloc
{
xpc_release(active);
[super dealloc];
}
- (id)initWithDelegate:(id<ControlDelegate>)delegate;
{
self = [super init];
helper = [[Helper alloc] init];
active = xpc_dictionary_create(NULL, NULL, 0);
del = delegate;
return self;
}
@end
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