Function lwip_close

components/net/lwip/lwip-2.1.2/src/api/sockets.c:793–832

}

int
lwip_close(int s)
{
  struct lwip_sock *sock;
  int is_tcp = 0;
  err_t err;

  LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_close(%d)\n", s));

  sock = get_socket(s);
  if (!sock) {
    return -1;
  }

  if (sock->conn != NULL) {
    is_tcp = NETCONNTYPE_GROUP(netconn_type(sock->conn)) == NETCONN_TCP;
  } else {
    LWIP_ASSERT("sock->lastdata == NULL", sock->lastdata.pbuf == NULL);
  }

#if LWIP_IGMP
  /* drop all possibly joined IGMP memberships */
  lwip_socket_drop_registered_memberships(s);
#endif /* LWIP_IGMP */
#if LWIP_IPV6_MLD
  /* drop all possibly joined MLD6 memberships */
  lwip_socket_drop_registered_mld6_memberships(s);
#endif /* LWIP_IPV6_MLD */

  err = netconn_prepare_delete(sock->conn);
  if (err != ERR_OK) {
    sock_set_errno(sock, err_to_errno(err));
    done_socket(sock);
    return -1;
  }

  free_socket(sock, is_tcp);
  set_errno(0);
  return 0;
}

int
lwip_connect(int s, const struct sockaddr *name, socklen_t namelen)