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/*
* This file is part of the Nice GLib ICE library.
*
* (C) 2007 Nokia Corporation. All rights reserved.
* Contact: Rémi Denis-Courmont
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is the Nice GLib ICE library.
*
* The Initial Developers of the Original Code are Collabora Ltd and Nokia
* Corporation. All Rights Reserved.
*
* Contributors:
* Rémi Denis-Courmont, Nokia
*
* Alternatively, the contents of this file may be used under the terms of the
* the GNU Lesser General Public License Version 2.1 (the "LGPL"), in which
* case the provisions of LGPL are applicable instead of those above. If you
* wish to allow use of your version of this file only under the terms of the
* LGPL and not to allow others to use your version of this file under the
* MPL, indicate your decision by deleting the provisions above and replace
* them with the notice and other provisions required by the LGPL. If you do
* not delete the provisions above, a recipient may use your version of this
* file under either the MPL or the LGPL.
*/
#ifndef STUN_BIND_H
# define STUN_BIND_H 1
/**
* SECTION:bind
* @short_description: STUN Binding Usage
* @include: stun/usages/bind.h
* @stability: Stable
*
* The STUN Binding usage allows for easily creating and parsing STUN Binding
* requests and responses. It offers both an asynchronous and a synchronous API
* that uses the STUN timer usage.
*/
#ifdef _WIN32
#include "win32_common.h"
#else
# include <stdbool.h>
# include <stdint.h>
#endif
# include "stun/stunagent.h"
# ifdef __cplusplus
extern "C" {
# endif
/**
* StunUsageBindReturn:
* @STUN_USAGE_BIND_RETURN_SUCCESS: The binding usage succeeded
* @STUN_USAGE_BIND_RETURN_ERROR: There was an unknown error in the bind usage
* @STUN_USAGE_BIND_RETURN_INVALID: The message is invalid and should be ignored
* @STUN_USAGE_BIND_RETURN_ALTERNATE_SERVER: The binding request has an
* ALTERNATE-SERVER attribute
* @STUN_USAGE_BIND_RETURN_TIMEOUT: The binding was unsuccessful because it has
* timed out.
*
* Return value of stun_usage_bind_process() and stun_usage_bind_run() which
* allows you to see what status the function call returned.
*/
typedef enum {
STUN_USAGE_BIND_RETURN_SUCCESS,
STUN_USAGE_BIND_RETURN_ERROR,
STUN_USAGE_BIND_RETURN_INVALID,
STUN_USAGE_BIND_RETURN_ALTERNATE_SERVER,
STUN_USAGE_BIND_RETURN_TIMEOUT,
} StunUsageBindReturn;
/**
* stun_usage_bind_create:
* @agent: The #StunAgent to use to create the binding request
* @msg: The #StunMessage to build
* @buffer: The buffer to use for creating the #StunMessage
* @buffer_len: The size of the @buffer
*
* Create a new STUN binding request to use with a STUN server.
* Returns: The length of the built message.
*/
size_t stun_usage_bind_create (StunAgent *agent, StunMessage *msg,
uint8_t *buffer, size_t buffer_len);
/**
* stun_usage_bind_process:
* @msg: The #StunMessage to process
* @addr: A pointer to a #sockaddr structure to fill with the mapped address
* that the STUN server gives us
* @addrlen: The length of @add. rMust be set to the size of the @addr socket
* address and will be set to the actual length of the socket address.
* @alternate_server: A pointer to a #sockaddr structure to fill with the
* address of an alternate server to which we should send our new STUN
* binding request, in case the currently used STUN server is requesting the use
* of an alternate server. This argument will only be filled if the return value
* of the function is #STUN_USAGE_BIND_RETURN_ALTERNATE_SERVER
* @alternate_server_len: The length of @alternate_server. Must be set to
* the size of the @alternate_server socket address and will be set to the
* actual length of the socket address.
*
* Process a STUN binding response and extracts the mapped address from the STUN
* message. Also checks for the ALTERNATE-SERVER attribute.
* Returns: A #StunUsageBindReturn value.
* Note that #STUN_USAGE_BIND_RETURN_TIMEOUT cannot be returned by this function
*/
StunUsageBindReturn stun_usage_bind_process (StunMessage *msg,
struct sockaddr *addr, socklen_t *addrlen,
struct sockaddr *alternate_server, socklen_t *alternate_server_len);
/**
* stun_usage_bind_keepalive:
* @agent: The #StunAgent to use to build the message
* @msg: The #StunMessage to build
* @buf: The buffer to use for creating the #StunMessage
* @len: The size of the @buf
*
* Creates a STUN binding indication that can be used for a keepalive.
* Since this is an indication message, no STUN response will be generated
* and it can only be used as a keepalive message.
* Returns: The length of the message to send
*/
size_t stun_usage_bind_keepalive (StunAgent *agent, StunMessage *msg,
uint8_t *buf, size_t len);
/**
* stun_usage_bind_run:
* @srv: A pointer to the #sockaddr structure representing the STUN server's
* address
* @srvlen: The length of @srv
* @addr: A pointer to a #sockaddr structure to fill with the mapped address
* that the STUN server gives us
* @addrlen: The length of @addr
*
* This is a convenience function that will do a synchronous Binding request to
* a server and wait for its answer. It will use the #StunUsageTrans and
* #StunUsageTimer usages to send the request and handle the response.
* Returns: A #StunUsageBindReturn.
* Possible return values are #STUN_USAGE_BIND_RETURN_SUCCESS,
* #STUN_USAGE_BIND_RETURN_ERROR and #STUN_USAGE_BIND_RETURN_TIMEOUT
*/
StunUsageBindReturn stun_usage_bind_run (const struct sockaddr *srv,
socklen_t srvlen, struct sockaddr *addr, socklen_t *addrlen);
# ifdef __cplusplus
}
# endif
#endif
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