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#ifndef __UNETD_STUN_H
#define __UNETD_STUN_H
#include <stdint.h>
#include <stdbool.h>
#define STUN_MSGTYPE_BINDING_REQUEST 0x0001
#define STUN_MSGTYPE_BINDING_RESPONSE 0x0101
#define STUN_MSGTYPE_BINDING_ERROR 0x0111
#define STUN_MSGTYPE_BINDING_INDICATION 0x0011
#define STUN_MSGTYPE_SHARED_SECRET_REQUEST 0x0002
#define STUN_MSGTYPE_SHARED_SECRET_RESPONSE 0x0102
#define STUN_MSGTYPE_SHARED_SECRET_ERROR 0x0112
#define STUN_MAGIC 0x2112a442
enum tlv_type {
STUN_TLV_MAPPED_ADDRESS = 0x01,
STUN_TLV_RESPONSE_ADDRESS = 0x02,
STUN_TLV_CHANGE_REQUEST = 0x03,
STUN_TLV_SOURCE_ADDRESS = 0x04,
STUN_TLV_CHANGED_ADDRESS = 0x05,
STUN_TLV_XOR_MAPPED_ADDRESS = 0x20,
STUN_TLV_RESPONSE_PORT = 0x27,
};
struct stun_msg_hdr {
uint16_t msg_type;
uint16_t msg_len;
uint32_t magic;
uint8_t transaction[12];
};
struct stun_msg_tlv {
uint16_t type;
uint16_t len;
};
struct stun_tlv_policy {
uint16_t type;
uint16_t min_len;
};
struct stun_request {
uint8_t transaction[12];
uint16_t port;
bool pending;
};
bool stun_msg_is_valid(const void *data, size_t len);
const void *stun_msg_request_prepare(struct stun_request *req, size_t *len,
uint16_t response_port);
bool stun_msg_request_complete(struct stun_request *req, const void *data,
size_t len);
#endif
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