/*
 * ministun.h
 * Part of the ministun package
 *
 * STUN support code borrowed from Asterisk -- An open source telephony toolkit.
 * Copyright (C) 1999 - 2006, Digium, Inc.
 * Mark Spencer <markster@digium.com>
 * Standalone remake (c) 2009 Vladislav Grishenko <themiron@mail.ru>
 *
 * This software is licensed under the terms of the GNU General
 * Public License (GPL). Please see the file COPYING for details.
 *
 */

#define PACKAGE  "ministun"
#define VERSION  "0.1"

#define STUN_SERVER "stun.xten.com"
#define STUN_PORT 3478
#define STUN_COUNT 3
#define STUN_TIMEOUT 3

#ifndef _MSC_VER
    typedef struct { unsigned int id[4]; } __attribute__((packed)) stun_trans_id;

    struct stun_header {
        unsigned short msgtype;
        unsigned short msglen;
        stun_trans_id id;
    } __attribute__((packed));

    struct stun_attr {
        unsigned short attr;
        unsigned short len;
    } __attribute__((packed));

    /*
    * The format normally used for addresses carried by STUN messages.
    */

    struct stun_addr {
        unsigned char unused;
        unsigned char family;
        unsigned short port;
        unsigned int addr;
    } __attribute__((packed));
#else
    typedef struct { unsigned int id[4]; } stun_trans_id;

#pragma pack(push, 1)    
    struct stun_header {
        unsigned short msgtype;
        unsigned short msglen;
        stun_trans_id id;
    };
#pragma pack(pop)

#pragma pack(push, 1)
    struct stun_attr {
        unsigned short attr;
        unsigned short len;
    };
#pragma pack(pop)

    /*
    * The format normally used for addresses carried by STUN messages.
    */
#pragma pack(push, 1)
    struct stun_addr {
        unsigned char unused;
        unsigned char family;
        unsigned short port;
        unsigned int addr;
    };
#pragma pack(pop)
#endif

#define STUN_IGNORE  (0)
#define STUN_ACCEPT  (1)

/* STUN message types
 * 'BIND' refers to transactions used to determine the externally
 * visible addresses. 'SEC' refers to transactions used to establish
 * a session key for subsequent requests.
 * 'SEC' functionality is not supported here.
 */

#define STUN_BINDREQ 0x0001
#define STUN_BINDRESP 0x0101
#define STUN_BINDERR 0x0111
#define STUN_SECREQ 0x0002
#define STUN_SECRESP 0x0102
#define STUN_SECERR 0x0112

/* Basic attribute types in stun messages.
 * Messages can also contain custom attributes (codes above 0x7fff)
 */
#define STUN_MAPPED_ADDRESS 0x0001
#define STUN_RESPONSE_ADDRESS 0x0002
#define STUN_CHANGE_REQUEST 0x0003
#define STUN_SOURCE_ADDRESS 0x0004
#define STUN_CHANGED_ADDRESS 0x0005
#define STUN_USERNAME  0x0006
#define STUN_PASSWORD  0x0007
#define STUN_MESSAGE_INTEGRITY 0x0008
#define STUN_ERROR_CODE  0x0009
#define STUN_UNKNOWN_ATTRIBUTES 0x000a
#define STUN_REFLECTED_FROM 0x000b