Function lwip_socket

components/net/lwip/lwip-2.1.2/src/api/sockets.c:1706–1765

}

int
lwip_socket(int domain, int type, int protocol)
{
  struct netconn *conn;
  int i;

  LWIP_UNUSED_ARG(domain); /* @todo: check this */

  /* create a netconn */
  switch (type) {
    case SOCK_RAW:
      conn = netconn_new_with_proto_and_callback(DOMAIN_TO_NETCONN_TYPE(domain, NETCONN_RAW),
             (u8_t)protocol, DEFAULT_SOCKET_EVENTCB);
      LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_socket(%s, SOCK_RAW, %d) = ",
                                  domain == PF_INET ? "PF_INET" : "UNKNOWN", protocol));
      break;
    case SOCK_DGRAM:
      conn = netconn_new_with_callback(DOMAIN_TO_NETCONN_TYPE(domain,
                                       ((protocol == IPPROTO_UDPLITE) ? NETCONN_UDPLITE : NETCONN_UDP)),
                                       DEFAULT_SOCKET_EVENTCB);
      LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_socket(%s, SOCK_DGRAM, %d) = ",
                                  domain == PF_INET ? "PF_INET" : "UNKNOWN", protocol));
#if LWIP_NETBUF_RECVINFO
      if (conn) {
        /* netconn layer enables pktinfo by default, sockets default to off */
        conn->flags &= ~NETCONN_FLAG_PKTINFO;
      }
#endif /* LWIP_NETBUF_RECVINFO */
      break;
    case SOCK_STREAM:
      conn = netconn_new_with_callback(DOMAIN_TO_NETCONN_TYPE(domain, NETCONN_TCP), DEFAULT_SOCKET_EVENTCB);
      LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_socket(%s, SOCK_STREAM, %d) = ",
                                  domain == PF_INET ? "PF_INET" : "UNKNOWN", protocol));
      break;
    default:
      LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_socket(%d, %d/UNKNOWN, %d) = -1\n",
                                  domain, type, protocol));
      set_errno(EINVAL);
      return -1;
  }

  if (!conn) {
    LWIP_DEBUGF(SOCKETS_DEBUG, ("-1 / ENOBUFS (could not create netconn)\n"));
    set_errno(ENOBUFS);
    return -1;
  }

  i = alloc_socket(conn, 0);

  if (i == -1) {
    netconn_delete(conn);
    set_errno(ENFILE);
    return -1;
  }
  conn->socket = i;
  done_socket(&sockets[i - LWIP_SOCKET_OFFSET]);
  LWIP_DEBUGF(SOCKETS_DEBUG, ("%d\n", i));
  set_errno(0);