sysdeps/mach/hurd/getpeername.c

   1 /* Copyright (C) 1992, 1994, 1997 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 Library General Public License as
   6    published by the Free Software Foundation; either version 2 of the
   7    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    Library General Public License for more details.
  13
  14    You should have received a copy of the GNU Library General Public
  15    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  16    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17    Boston, MA 02111-1307, USA.  */
  18
  19 #include <errno.h>
  20 #include <sys/socket.h>
  21 #include <hurd.h>
  22 #include <hurd/fd.h>
  23 #include <hurd/socket.h>
  24 #include <string.h>
  25
  26 /* Put the address of the peer connected to socket FD into *ADDR
  27    (which is *LEN bytes long), and its actual length into *LEN.  */
  28
  29 /* XXX should be __getpeername ? */
  30 int
  31 getpeername (fd, addrarg, len)
  32      int fd;
  33      __SOCKADDR_ARG addrarg;
  34      size_t *len;
  35 {
  36   error_t err;
  37   mach_msg_type_number_t buflen = *len;
  38   int type;
  39   struct sockaddr *addr = addrarg.__sockaddr__;
  40   char *buf = (char *) addr;
  41   addr_port_t aport;
  42
  43   if (err = HURD_DPORT_USE (fd, __socket_peername (port, &aport)))
  44     return __hurd_dfail (fd, err);
  45
  46   err = __socket_whatis_address (aport, &type, &buf, &buflen);
  47   __mach_port_deallocate (__mach_task_self (), aport);
  48
  49   if (err)
  50     return __hurd_dfail (fd, err);
  51
  52   if (buf != (char *) addr)
  53     {
  54       if (*len < buflen)
  55         *len = buflen;
  56       memcpy (addr, buf, *len);
  57       __vm_deallocate (__mach_task_self (), (vm_address_t) buf, buflen);
  58     }
  59
  60   addr->sa_family = type;
  61
  62   return 0;
  63 }