text: /*
   * Copyright (c) 2007 The FFmpeg Project
   *
   * This file is part of FFmpeg.
   *
   * FFmpeg is free software; you can redistribute it and/or
   * modify it under the terms of the GNU Lesser General Public
   * License as published by the Free Software Foundation; either
   * version 2.1 of the License, or (at your option) any later version.
   *
   * FFmpeg is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   * Lesser General Public License for more details.
   *
   * You should have received a copy of the GNU Lesser General Public
   * License along with FFmpeg; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
   */
  
  #ifndef AVFORMAT_NETWORK_H
  #define AVFORMAT_NETWORK_H
  
  #include <errno.h>
  #include <stdint.h>
  
  #include "config.h"
  #include "libavutil/error.h"
  #include "os_support.h"
  #include "avio.h"
  #include "url.h"
  
  #if HAVE_UNISTD_H
  #include <unistd.h>
  #endif
  
  #if HAVE_WINSOCK2_H
  #include <winsock2.h>
  #include <ws2tcpip.h>
  
  #ifndef EPROTONOSUPPORT
  #define EPROTONOSUPPORT WSAEPROTONOSUPPORT
  #endif
  #ifndef ETIMEDOUT
  #define ETIMEDOUT       WSAETIMEDOUT
  #endif
  #ifndef ECONNREFUSED
  #define ECONNREFUSED    WSAECONNREFUSED
  #endif
  #ifndef EINPROGRESS
  #define EINPROGRESS     WSAEINPROGRESS
  #endif
  
  #define getsockopt(a, b, c, d, e) getsockopt(a, b, c, (char*) d, e)
  #define setsockopt(a, b, c, d, e) setsockopt(a, b, c, (const char*) d, e)
  
  int ff_neterrno(void);
  #else
  #include <sys/types.h>
  #include <sys/socket.h>
  #include <netinet/in.h>
  #include <netdb.h>
  
  #define ff_neterrno() AVERROR(errno)
  #endif
  
  #if HAVE_ARPA_INET_H
  #include <arpa/inet.h>
  #endif
  
  #if HAVE_POLL_H
  #include <poll.h>
  #endif
  
  int ff_socket_nonblock(int socket, int enable);
  
  extern int ff_network_inited_globally;
  int ff_network_init(void);
  void ff_network_close(void);
  
  void ff_tls_init(void);
  void ff_tls_deinit(void);
  
  int ff_network_wait_fd(int fd, int write);
  
  /**
   * This works similarly to ff_network_wait_fd, but waits up to 'timeout' microseconds
   * Uses ff_network_wait_fd in a loop
   *
   * @fd Socket descriptor
   * @write Set 1 to wait for socket able to be read, 0 to be written
   * @timeout Timeout interval, in microseconds. Actual precision is 100000 mcs, due to ff_network_wait_fd usage
   * @param int_cb Interrupt callback, is checked after each ff_network_wait_fd call
   * @return 0 if data can be read/written, AVERROR(ETIMEDOUT) if timeout expired, or negative error code
   */
  int ff_network_wait_fd_timeout(int fd, int write, int64_t timeout, AVIOInterruptCB *int_cb);
  
  int ff_inet_aton (const char * str, struct in_addr * add);
  
  #if !HAVE_STRUCT_SOCKADDR_STORAGE
  struct sockaddr_storage {
  #if HAVE_STRUCT_SOCKADDR_SA_LEN
      uint8_t ss_len;
      uint8_t ss_family;
  #else
      uint16_t ss_family;
  #endif
      char ss_pad1[6];
      int64_t ss_align;
      char ss_pad2[112];
  };
  #endif
  
  #if !HAVE_STRUCT_ADDRINFO
  struct addrinfo {
      int ai_flags;
      int ai_family;
      int ai_socktype;
      int ai_protocol;
      int ai_addrlen;
      struct sockaddr *ai_addr;
      char *ai_canonname;
      struct addrinfo *ai_next;
  };
  #endif
  
  /* getaddrinfo constants */
  #ifndef EAI_AGAIN
  #define EAI_AGAIN 2
  #endif
  #ifndef EAI_BADFLAGS
  #define EAI_BADFLAGS 3
  #endif
  #ifndef EAI_FAIL
  #define EAI_FAIL 4
  #endif
  #ifndef EAI_FAMILY
  #define EAI_FAMILY 5
  #endif
  #ifndef EAI_MEMORY
  #define EAI_MEMORY 6
  #endif
  #ifndef EAI_NODATA
  #define EAI_NODATA 7
  #endif
  #ifndef EAI_NONAME
  #define EAI_NONAME 8
  #endif
  #ifndef EAI_SERVICE
  #define EAI_SERVICE 9
  #endif
  #ifndef EAI_SOCKTYPE
  #define EAI_SOCKTYPE 10
  #endif
  
  #ifndef AI_PASSIVE
  #define AI_PASSIVE 1
  #endif
  
  #ifndef AI_CANONNAME
  #define AI_CANONNAME 2
  #endif
  
  #ifndef AI_NUMERICHOST
  #define AI_NUMERICHOST 4
  #endif
  
  #ifndef NI_NOFQDN
  #define NI_NOFQDN 1
  #endif
  
  #ifndef NI_NUMERICHOST
  #define NI_NUMERICHOST 2
  #endif
  
  #ifndef NI_NAMERQD
  #define NI_NAMERQD 4
  #endif
  
  #ifndef NI_NUMERICSERV
  #define NI_NUMERICSERV 8
  #endif
  
  #ifndef NI_DGRAM
  #define NI_DGRAM 16
  #endif
  
  #if !HAVE_GETADDRINFO
  int ff_getaddrinfo(const char *node, const char *service,
                     const struct addrinfo *hints, struct addrinfo **res);
  void ff_freeaddrinfo(struct addrinfo *res);
  int ff_getnameinfo(const struct sockaddr *sa, int salen,
                     char *host, int hostlen,
                     char *serv, int servlen, int flags);
  #define getaddrinfo ff_getaddrinfo
  #define freeaddrinfo ff_freeaddrinfo
  #define getnameinfo ff_getnameinfo
  #endif
  #if !HAVE_GETADDRINFO || HAVE_WINSOCK2_H
  const char *ff_gai_strerror(int ecode);
  #undef gai_strerror
  #define gai_strerror ff_gai_strerror
  #endif
  
  #ifndef INADDR_LOOPBACK
  #define INADDR_LOOPBACK 0x7f000001
  #endif
  
  #ifndef INET_ADDRSTRLEN
  #define INET_ADDRSTRLEN 16
  #endif
  
  #ifndef INET6_ADDRSTRLEN
  #define INET6_ADDRSTRLEN INET_ADDRSTRLEN
  #endif
  
  #ifndef IN_MULTICAST
  #define IN_MULTICAST(a) ((((uint32_t)(a)) & 0xf0000000) == 0xe0000000)
  #endif
  #ifndef IN6_IS_ADDR_MULTICAST
  #define IN6_IS_ADDR_MULTICAST(a) (((uint8_t *) (a))[0] == 0xff)
  #endif
  
  int ff_is_multicast_address(struct sockaddr *addr);
  
  #define POLLING_TIME 100 /// Time in milliseconds between interrupt check
  
  /**
   * Bind to a file descriptor and poll for a connection.
   *
   * @param fd      First argument of bind().
   * @param addr    Second argument of bind().
   * @param addrlen Third argument of bind().
   * @param timeout Polling timeout in milliseconds.
   * @param h       URLContext providing interrupt check
   *                callback and logging context.
   * @return        A non-blocking file descriptor on success
   *                or an AVERROR on failure.
   */
  int ff_listen_bind(int fd, const struct sockaddr *addr,
                     socklen_t addrlen, int timeout,
                     URLContext *h);
  
  /**
   * Connect to a file descriptor and poll for result.
   *
   * @param fd       First argument of connect(),
   *                 will be set as non-blocking.
   * @param addr     Second argument of connect().
   * @param addrlen  Third argument of connect().
   * @param timeout  Polling timeout in milliseconds.
   * @param h        URLContext providing interrupt check
   *                 callback and logging context.
   * @return         0 on success, AVERROR on failure.
   */
  int ff_listen_connect(int fd, const struct sockaddr *addr,
                        socklen_t addrlen, int timeout,
                        URLContext *h);
  
  int ff_http_match_no_proxy(const char *no_proxy, const char *hostname);
  
  #endif /* AVFORMAT_NETWORK_H */
  