/*
 * SPDX-License-Identifier: BSD-3-Clause
 *
 * https://opensource.org/license/bsd-3-clause
 *
 * 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 __IOADEFS__
#define __IOADEFS__

#define TURN_SERVER_VERSION "4.15.0"
#define TURN_SERVER_VERSION_NAME "Gorst"
#ifndef TURN_SERVER_BUILD_INFO
#define TURN_SERVER_BUILD_INFO ""
#endif
#define TURN_SOFTWARE "Coturn-" TURN_SERVER_VERSION " '" TURN_SERVER_VERSION_NAME "'" TURN_SERVER_BUILD_INFO

#if (defined(__unix__) || defined(unix)) && !defined(USG)
#include <sys/param.h>
#endif

#if defined(__APPLE__)
#define __APPLE_USE_RFC_3542
#endif

#if defined(WINDOWS)
#include <process.h>
#include <ws2tcpip.h>
/* MSVC has no <strings.h>; it spells the POSIX case-insensitive compares with a
 * leading underscore, in <string.h>. */
#define strcasecmp _stricmp
#define strncasecmp _strnicmp
#else
#include <arpa/inet.h>   // IWYU pragma: export
#include <net/if.h>      // IWYU pragma: export
#include <netinet/in.h>  // IWYU pragma: export
#include <netinet/tcp.h> // IWYU pragma: export
#include <strings.h>
#include <sys/socket.h> // IWYU pragma: export
#include <unistd.h>     // IWYU pragma: export
#endif

#include <ctype.h>
#include <errno.h>
#include <inttypes.h>
#include <stdarg.h>
#include <stddef.h> // IWYU pragma: export
#include <stdint.h> // IWYU pragma: export
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <time.h>

#ifdef __cplusplus
extern "C" {
#endif

#define nswap16(s) ntohs(s)
#define nswap32(ul) ntohl(ul)
#define nswap64(ull) ioa_ntoh64(ull)

static inline uint64_t _ioa_ntoh64(uint64_t v) {
#if BYTE_ORDER == LITTLE_ENDIAN
  uint8_t *src = (uint8_t *)&v;
  uint8_t *dst = src + 7;
  while (src < dst) {
    uint8_t vdst = *dst;
    *(dst--) = *src;
    *(src++) = vdst;
  }
#elif BYTE_ORDER == BIG_ENDIAN
  /* OK */
#else
#error WRONG BYTE_ORDER SETTING
#endif
  return v;
}

/* TTL */
#define TTL_IGNORE ((int)(-1))
#define TTL_DEFAULT (64)

/* TOS */
#define TOS_IGNORE ((int)(-1))
#define TOS_DEFAULT (0)

#define ioa_ntoh64 _ioa_ntoh64
#define ioa_hton64 _ioa_ntoh64

/* Alignment-safe access to network-order (big-endian) wire fields.
 *
 * STUN attributes and headers sit at arbitrary byte offsets inside receive
 * buffers, so casting the byte pointer to a wider integer pointer and
 * dereferencing it is undefined behavior (SIGBUS on strict-alignment
 * architectures). These helpers go through memcpy — which compilers fold
 * into a single load/store — and convert to/from host byte order.
 * For fields that are NOT byte-swapped (e.g. values kept in network order
 * or CONNECTION-ID's as-is encoding), use a plain memcpy instead. */
static inline uint16_t turn_read_u16(const void *field) {
  uint16_t v;
  memcpy(&v, field, sizeof(v));
  return nswap16(v);
}

static inline uint32_t turn_read_u32(const void *field) {
  uint32_t v;
  memcpy(&v, field, sizeof(v));
  return nswap32(v);
}

static inline uint64_t turn_read_u64(const void *field) {
  uint64_t v;
  memcpy(&v, field, sizeof(v));
  return nswap64(v);
}

static inline void turn_write_u16(void *field, uint16_t v) {
  const uint16_t raw = nswap16(v);
  memcpy(field, &raw, sizeof(raw));
}

static inline void turn_write_u32(void *field, uint32_t v) {
  const uint32_t raw = nswap32(v);
  memcpy(field, &raw, sizeof(raw));
}

static inline void turn_write_u64(void *field, uint64_t v) {
  const uint64_t raw = nswap64(v);
  memcpy(field, &raw, sizeof(raw));
}

#if defined(WINDOWS)
static inline int socket_errno(void) { return WSAGetLastError(); }
static inline int socket_enomem(void) { return socket_errno() == WSA_NOT_ENOUGH_MEMORY; }
static inline int socket_eintr(void) { return socket_errno() == WSAEINTR; }
static inline int socket_ebadf(void) { return socket_errno() == WSAEBADF; }
static inline int socket_eacces(void) { return socket_errno() == WSAEACCES; }
static inline int socket_enobufs(void) { return socket_errno() == WSAENOBUFS; }
static inline int socket_eagain(void) { return socket_errno() == WSATRY_AGAIN; }
static inline int socket_ewouldblock(void) { return socket_errno() == WSAEWOULDBLOCK; }
static inline int socket_einprogress(void) { return socket_errno() == WSAEINPROGRESS; }
static inline int socket_econnreset(void) { return socket_errno() == WSAECONNRESET; }
static inline int socket_econnrefused(void) { return socket_errno() == WSAECONNREFUSED; }
static inline int socket_ehostdown(void) { return socket_errno() == WSAEHOSTDOWN; }
static inline int socket_emsgsize(void) { return socket_errno() == WSAEMSGSIZE; }
#else
static inline int socket_errno(void) { return errno; }
static inline int socket_eperm(void) { return socket_errno() == EPERM; }
static inline int socket_enomem(void) { return socket_errno() == ENOMEM; }
static inline int socket_eintr(void) { return socket_errno() == EINTR; }
static inline int socket_ebadf(void) { return socket_errno() == EBADF; }
static inline int socket_eacces(void) { return socket_errno() == EACCES; }
static inline int socket_enobufs(void) { return socket_errno() == ENOBUFS; }
static inline int socket_eagain(void) { return socket_errno() == EAGAIN; }
#if defined(EWOULDBLOCK)
static inline int socket_ewouldblock(void) { return socket_errno() == EWOULDBLOCK; }
#else
static inline int socket_ewouldblock(void) { return socket_errno() == EAGAIN; }
#endif
static inline int socket_einprogress(void) { return socket_errno() == EINPROGRESS; }
static inline int socket_econnreset(void) { return socket_errno() == ECONNRESET; }
static inline int socket_econnrefused(void) { return socket_errno() == ECONNREFUSED; }
static inline int socket_ehostdown(void) { return socket_errno() == EHOSTDOWN; }
static inline int socket_emsgsize(void) { return socket_errno() == EMSGSIZE; }
#endif

#define BUFFEREVENT_FREE(be)                                                                                           \
  do {                                                                                                                 \
    if (be) {                                                                                                          \
      bufferevent_flush(be, EV_READ | EV_WRITE, BEV_FLUSH);                                                            \
      bufferevent_disable(be, EV_READ | EV_WRITE);                                                                     \
      bufferevent_free(be);                                                                                            \
      be = NULL;                                                                                                       \
    }                                                                                                                  \
  } while (0)

#define turn_time() ((turn_time_t)time(NULL))

typedef int vint;
typedef vint *vintp;

typedef uint32_t turn_time_t;

#define turn_time_before(t1, t2) ((((int32_t)(t1)) - ((int32_t)(t2))) < 0)

#if !defined(UNUSED_ARG)
#define UNUSED_ARG(A)                                                                                                  \
  do {                                                                                                                 \
    A = A;                                                                                                             \
  } while (0)
#endif

#define MAX_STUN_MESSAGE_SIZE (65507)
#define STUN_BUFFER_SIZE (MAX_STUN_MESSAGE_SIZE)
#define UDP_STUN_BUFFER_SIZE (1024 << 4)

#define NONCE_LENGTH_32BITS (4)

#define DEFAULT_STUN_PORT (3478)
#define DEFAULT_STUN_TLS_PORT (5349)

#if BYTE_ORDER == LITTLE_ENDIAN
#define DEFAULT_STUN_PORT_NBO (0x960D)
#elif BYTE_ORDER == BIG_ENDIAN
#define DEFAULT_STUN_PORT_NBO (0x0D96)
#else
#error WRONG BYTE_ORDER SETTING
#endif

// NOLINTBEGIN(clang-diagnostic-string-compare)
#define STRCPY(dst, src)                                                                                               \
  do {                                                                                                                 \
    if ((const char *)(dst) != (const char *)(src)) {                                                                  \
      if (sizeof(dst) == sizeof(char *))                                                                               \
        strcpy(((char *)(dst)), (const char *)(src));                                                                  \
      else {                                                                                                           \
        size_t szdst = sizeof((dst));                                                                                  \
        strncpy((char *)(dst), (const char *)(src), szdst);                                                            \
        ((char *)(dst))[szdst - 1] = 0;                                                                                \
      }                                                                                                                \
    }                                                                                                                  \
  } while (0)
// NOLINTEND(clang-diagnostic-string-compare)

//////////////// Bufferevents /////////////////////

#define TURN_BUFFEREVENTS_OPTIONS (BEV_OPT_DEFER_CALLBACKS | BEV_OPT_THREADSAFE | BEV_OPT_UNLOCK_CALLBACKS)

//////////////// KERNEL-LEVEL CHANNEL HANDLERS /////////

#if !defined(TURN_CHANNEL_HANDLER_KERNEL)
#define TURN_CHANNEL_HANDLER_KERNEL void *
#endif

#if !defined(CREATE_TURN_CHANNEL_KERNEL)
#define CREATE_TURN_CHANNEL_KERNEL(channel_number, address_family_client, address_family_peer, protocol_client,        \
                                   client_addr, local_addr, local_relay_addr, peer_addr)                               \
  ((TURN_CHANNEL_HANDLER_KERNEL)(1))
#endif

#if !defined(DELETE_TURN_CHANNEL_KERNEL)
#define DELETE_TURN_CHANNEL_KERNEL(handler)
#endif

////////////////////////////////////////////////////////

#if !defined(IPPROTO_SCTP) && !defined(TURN_NO_SCTP)
#define TURN_NO_SCTP
#endif

#define CLIENT_DGRAM_SOCKET_TYPE SOCK_DGRAM
#define CLIENT_DGRAM_SOCKET_PROTOCOL IPPROTO_IP

#define CLIENT_STREAM_SOCKET_TYPE SOCK_STREAM
#define CLIENT_STREAM_SOCKET_PROTOCOL IPPROTO_IP

#define SCTP_CLIENT_STREAM_SOCKET_TYPE SOCK_STREAM

#if !defined(TURN_NO_SCTP)
#define SCTP_CLIENT_STREAM_SOCKET_PROTOCOL IPPROTO_SCTP
#else
#define SCTP_CLIENT_STREAM_SOCKET_PROTOCOL IPPROTO_IP
#endif

#define RELAY_DGRAM_SOCKET_TYPE SOCK_DGRAM
#define RELAY_DGRAM_SOCKET_PROTOCOL IPPROTO_IP
#define RELAY_STREAM_SOCKET_TYPE SOCK_STREAM
#define RELAY_STREAM_SOCKET_PROTOCOL IPPROTO_IP

#define ADMIN_STREAM_SOCKET_TYPE SOCK_STREAM
#define ADMIN_STREAM_SOCKET_PROTOCOL IPPROTO_IP

////////////////////////////////////////////////////////

#ifdef __cplusplus
}
#endif

#endif
/* __IODEFS__ */
