sysdeps/mach/hurd/getsockname.c

   1 /* Copyright (C) 1992, 1994, 1997, 1999, 2002 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, write to the Free
  16    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  17    02111-1307 USA.  */
  18
  19 #include <errno.h>
  20 #include <string.h>
  21 #include <sys/socket.h>
  22 #include <hurd.h>
  23 #include <hurd/fd.h>
  24 #include <hurd/socket.h>
  25
  26 /* Put the local address of FD into *ADDR and its length in *LEN.  */
  27 int
  28 __getsockname (fd, addrarg, len)
  29      int fd;
  30      __SOCKADDR_ARG addrarg;
  31      socklen_t *len;
  32 {
  33   error_t err;
  34   struct sockaddr *addr = addrarg.__sockaddr__;
  35   char *buf = (char *) addr;
  36   mach_msg_type_number_t buflen = *len;
  37   int type;
  38   addr_port_t aport;
  39
  40   if (err = HURD_DPORT_USE (fd, __socket_name (port, &aport)))
  41     return __hurd_dfail (fd, err);
  42
  43   err = __socket_whatis_address (aport, &type, &buf, &buflen);
  44   __mach_port_deallocate (__mach_task_self (), aport);
  45
  46   if (err)
  47     return __hurd_dfail (fd, err);
  48
  49   if (*len > buflen)
  50     *len = buflen;
  51
  52   if (buf != (char *) addr)
  53     {
  54       memcpy (addr, buf, *len);
  55       __vm_deallocate (__mach_task_self (), (vm_address_t) buf, buflen);
  56     }
  57
  58   addr->sa_family = type;
  59
  60   return 0;
  61 }
  62
  63 weak_alias (__getsockname, getsockname)