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/*
* Copyright (C) 2011, 2012, 2013 Citrix Systems
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the project nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef __LIB_TURN_MSG__
#define __LIB_TURN_MSG__
#include "ns_turn_ioaddr.h"
#include "ns_turn_msg_defs.h"
#ifdef __cplusplus
extern "C" {
#endif
///////////////////////////////////
/**
* Structure holding the STUN message Transaction ID
*/
#define STUN_TID_SIZE (12)
typedef struct {
/**
* Binary array
*/
uint8_t tsx_id[STUN_TID_SIZE];
} stun_tid;
typedef enum {
TURN_CREDENTIALS_NONE = 0,
TURN_CREDENTIALS_LONG_TERM,
TURN_CREDENTIALS_SHORT_TERM,
TURN_CREDENTIALS_UNDEFINED
} turn_credential_type;
/**
* HMAC key
*/
typedef u08bits hmackey_t[64];
typedef u08bits password_t[STUN_MAX_PWD_SIZE+1];
typedef unsigned long band_limit_t;
///////////////////////////////////
typedef const void* stun_attr_ref;
//////////////////////////////////////////////////////////////
int stun_tid_equals(const stun_tid *id1, const stun_tid *id2);
void stun_tid_cpy(stun_tid *id_dst, const stun_tid *id_src);
void stun_tid_generate(stun_tid* id);
///////////////////////////////////////////////////////////////
u16bits stun_make_type(u16bits method);
u16bits stun_make_request(u16bits method);
u16bits stun_make_indication(u16bits method);
u16bits stun_make_success_response(u16bits method);
u16bits stun_make_error_response(u16bits method);
///////////////////////////////////////////////////////////////
turn_time_t stun_adjust_allocate_lifetime(turn_time_t lifetime, turn_time_t max_allowed_lifetime, turn_time_t max_lifetime);
///////////// STR ////////////////////////////////////////////////
int stun_method_str(u16bits method, char *smethod);
int stun_get_message_len_str(u08bits *buf, size_t len, int padding, size_t *app_len);
void stun_init_buffer_str(u08bits *buf, size_t *len);
void stun_init_command_str(u16bits message_type, u08bits* buf, size_t *len);
void old_stun_init_command_str(u16bits message_type, u08bits* buf, size_t *len, u32bits cookie);
void stun_init_request_str(u16bits method, u08bits* buf, size_t *len);
void stun_init_indication_str(u16bits method, u08bits* buf, size_t *len);
void stun_init_success_response_str(u16bits method, u08bits* buf, size_t *len, stun_tid* id);
void old_stun_init_success_response_str(u16bits method, u08bits* buf, size_t *len, stun_tid* id, u32bits cookie);
void stun_init_error_response_str(u16bits method, u08bits* buf, size_t *len, u16bits error_code, const u08bits *reason, stun_tid* id);
void old_stun_init_error_response_str(u16bits method, u08bits* buf, size_t *len, u16bits error_code, const u08bits *reason, stun_tid* id, u32bits cookie);
int stun_init_channel_message_str(u16bits chnumber, u08bits* buf, size_t *len, int length, int do_padding);
int stun_is_command_message_str(const u08bits* buf, size_t blen);
int old_stun_is_command_message_str(const u08bits* buf, size_t blen, u32bits *cookie);
int stun_is_command_message_full_check_str(const u08bits* buf, size_t blen, int must_check_fingerprint, int *fingerprint_present);
int stun_is_command_message_offset_str(const u08bits* buf, size_t blen, int offset);
int stun_is_request_str(const u08bits* buf, size_t len);
int stun_is_success_response_str(const u08bits* buf, size_t len);
int stun_is_error_response_str(const u08bits* buf, size_t len, int *err_code, u08bits *err_msg, size_t err_msg_size);
int stun_is_challenge_response_str(const u08bits* buf, size_t len, int *err_code, u08bits *err_msg, size_t err_msg_size, u08bits *realm, u08bits *nonce, u08bits *server_name, int *oauth);
int stun_is_response_str(const u08bits* buf, size_t len);
int stun_is_indication_str(const u08bits* buf, size_t len);
u16bits stun_get_method_str(const u08bits *buf, size_t len);
u16bits stun_get_msg_type_str(const u08bits *buf, size_t len);
int stun_is_channel_message_str(const u08bits *buf, size_t *blen, u16bits* chnumber, int mandatory_padding);
int is_channel_msg_str(const u08bits* buf, size_t blen);
void stun_set_binding_request_str(u08bits* buf, size_t *len);
int stun_set_binding_response_str(u08bits* buf, size_t *len, stun_tid* tid,
const ioa_addr *reflexive_addr, int error_code,
const u08bits *reason,
u32bits cookie, int old_stun);
int stun_is_binding_request_str(const u08bits* buf, size_t len, size_t offset);
int stun_is_binding_response_str(const u08bits* buf, size_t len);
void stun_tid_from_message_str(const u08bits* buf, size_t len, stun_tid* id);
void stun_tid_message_cpy(u08bits *buf, const stun_tid* id);
void stun_tid_generate_in_message_str(u08bits* buf, stun_tid* id);
int stun_get_command_message_len_str(const u08bits* buf, size_t len);
const u08bits* get_default_reason(int error_code);
int stun_attr_is_addr(stun_attr_ref attr);
int stun_attr_get_type(stun_attr_ref attr);
int stun_attr_get_len(stun_attr_ref attr);
const u08bits* stun_attr_get_value(stun_attr_ref attr);
u16bits stun_attr_get_channel_number(stun_attr_ref attr);
band_limit_t stun_attr_get_bandwidth(stun_attr_ref attr);
u08bits stun_attr_get_even_port(stun_attr_ref attr);
u64bits stun_attr_get_reservation_token_value(stun_attr_ref attr);
stun_attr_ref stun_attr_get_first_by_type_str(const u08bits* buf, size_t len, u16bits attr_type);
stun_attr_ref stun_attr_get_first_str(const u08bits* buf, size_t len);
stun_attr_ref stun_attr_get_next_str(const u08bits* buf, size_t len, stun_attr_ref prev);
int stun_attr_add_str(u08bits* buf, size_t *len, u16bits attr, const u08bits* avalue, int alen);
int stun_attr_add_addr_str(u08bits *buf, size_t *len, u16bits attr_type, const ioa_addr* ca);
int stun_attr_get_addr_str(const u08bits *buf, size_t len, stun_attr_ref attr, ioa_addr* ca, const ioa_addr *default_addr);
int stun_attr_get_first_addr_str(const u08bits *buf, size_t len, u16bits attr_type, ioa_addr* ca, const ioa_addr *default_addr);
int stun_attr_add_channel_number_str(u08bits* buf, size_t *len, u16bits chnumber);
int stun_attr_add_bandwidth_str(u08bits* buf, size_t *len, band_limit_t bps);
int stun_attr_add_address_error_code(u08bits* buf, size_t *len, int requested_address_family, int error_code);
/* return +1 if present, 0 if not, -1 if error: */
int stun_attr_get_address_error_code(u08bits* buf, size_t len, int *requested_address_family, int *error_code);
u16bits stun_attr_get_first_channel_number_str(const u08bits *buf, size_t len);
int stun_set_allocate_request_str(u08bits* buf, size_t *len, u32bits lifetime, int af4, int af6, u08bits transport, int mobile, const char* rt, int ep);
int stun_set_allocate_response_str(u08bits* buf, size_t *len, stun_tid* tid,
const ioa_addr *relayed_addr1, const ioa_addr *relayed_addr2,
const ioa_addr *reflexive_addr,
u32bits lifetime, u32bits max_lifetime, int error_code, const u08bits *reason,
u64bits reservation_token, char *mobile_id);
u16bits stun_set_channel_bind_request_str(u08bits* buf, size_t *len,
const ioa_addr* peer_addr, u16bits channel_number);
void stun_set_channel_bind_response_str(u08bits* buf, size_t *len, stun_tid* tid, int error_code, const u08bits *reason);
int stun_get_requested_address_family(stun_attr_ref attr);
int stun_attr_add_fingerprint_str(u08bits *buf, size_t *len);
int SASLprep(u08bits *s);
#define print_bin(str, len, field) print_bin_func(str,len,field,__FUNCTION__)
void print_bin_func(const char *name, size_t len, const void *s, const char *func);
/*
* Return -1 if failure, 0 if the integrity is not correct, 1 if OK
*/
int stun_check_message_integrity_by_key_str(turn_credential_type ct, u08bits *buf, size_t len, hmackey_t key, password_t pwd, SHATYPE shatype);
int stun_check_message_integrity_str(turn_credential_type ct, u08bits *buf, size_t len, u08bits *uname, u08bits *realm, u08bits *upwd, SHATYPE shatype);
int stun_attr_add_integrity_str(turn_credential_type ct, u08bits *buf, size_t *len, hmackey_t key, password_t pwd, SHATYPE shatype);
int stun_attr_add_integrity_by_key_str(u08bits *buf, size_t *len, u08bits *uname, u08bits *realm, hmackey_t key, u08bits *nonce, SHATYPE shatype);
int stun_attr_add_integrity_by_user_str(u08bits *buf, size_t *len, u08bits *uname, u08bits *realm, u08bits *upwd, u08bits *nonce, SHATYPE shatype);
int stun_attr_add_integrity_by_user_short_term_str(u08bits *buf, size_t *len, u08bits *uname, password_t pwd, SHATYPE shatype);
size_t get_hmackey_size(SHATYPE shatype);
/*
* To be implemented with openssl
*/
#define TURN_RANDOM_SIZE (sizeof(long))
long turn_random(void);
int stun_produce_integrity_key_str(u08bits *uname, u08bits *realm, u08bits *upwd, hmackey_t key, SHATYPE shatype);
int stun_calculate_hmac(const u08bits *buf, size_t len, const u08bits *key, size_t sz, u08bits *hmac, unsigned int *hmac_len, SHATYPE shatype);
/* RFC 5780 */
int stun_attr_get_change_request_str(stun_attr_ref attr, int *change_ip, int *change_port);
int stun_attr_add_change_request_str(u08bits *buf, size_t *len, int change_ip, int change_port);
int stun_attr_get_response_port_str(stun_attr_ref attr);
int stun_attr_add_response_port_str(u08bits *buf, size_t *len, u16bits port);
int stun_attr_get_padding_len_str(stun_attr_ref attr);
int stun_attr_add_padding_str(u08bits *buf, size_t *len, u16bits padding_len);
/* HTTP */
int is_http(const char *s, size_t blen);
/* OAUTH */
int convert_oauth_key_data(const oauth_key_data *oakd, oauth_key *key, char *err_msg, size_t err_msg_size);
int decode_oauth_token(const u08bits *server_name, const encoded_oauth_token *etoken, const oauth_key *key, oauth_token *dtoken);
int encode_oauth_token(const u08bits *server_name, encoded_oauth_token *etoken, const oauth_key *key, const oauth_token *dtoken, const u08bits *nonce);
/* Encrypted password */
void generate_new_enc_password(const char* pwd, char *result);
int check_password(const char* pin, const char* pwd);
///////////////////////////////////////////////////////////////
#ifdef __cplusplus
}
#endif
#endif //__LIB_TURN_MSG__
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