1  /* Copyright (C) 1992-2023 Free Software Foundation, Inc.
       2     This file is part of the GNU C Library.
       3  
       4     The GNU C Library is free software; you can redistribute it and/or
       5     modify it under the terms of the GNU Lesser General Public
       6     License as published by the Free Software Foundation; either
       7     version 2.1 of the License, or (at your option) any later version.
       8  
       9     The GNU C Library is distributed in the hope that it will be useful,
      10     but WITHOUT ANY WARRANTY; without even the implied warranty of
      11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      12     Lesser General Public License for more details.
      13  
      14     You should have received a copy of the GNU Lesser General Public
      15     License along with the GNU C Library; if not, see
      16     <https://www.gnu.org/licenses/>.  */
      17  
      18  #include <errno.h>
      19  #include <string.h>
      20  #include <sys/socket.h>
      21  #include <hurd.h>
      22  #include <hurd/fd.h>
      23  #include <hurd/socket.h>
      24  
      25  /* Put the local address of FD into *ADDR and its length in *LEN.  */
      26  int
      27  __getsockname (int fd, __SOCKADDR_ARG addrarg, socklen_t *len)
      28  {
      29    error_t err;
      30    struct sockaddr *addr = addrarg.__sockaddr__;
      31    char *buf = (char *) addr;
      32    mach_msg_type_number_t buflen = *len;
      33    int type;
      34    addr_port_t aport;
      35  
      36    if (err = HURD_DPORT_USE (fd, __socket_name (port, &aport)))
      37      return __hurd_dfail (fd, err);
      38  
      39    err = __socket_whatis_address (aport, &type, &buf, &buflen);
      40    __mach_port_deallocate (__mach_task_self (), aport);
      41  
      42    if (err)
      43      return __hurd_dfail (fd, err);
      44  
      45    if (*len > buflen)
      46      *len = buflen;
      47  
      48    if (buf != (char *) addr)
      49      {
      50        memcpy (addr, buf, *len);
      51        __vm_deallocate (__mach_task_self (), (vm_address_t) buf, buflen);
      52      }
      53  
      54    addr->sa_family = type;
      55  
      56    return 0;
      57  }
      58  
      59  weak_alias (__getsockname, getsockname)