Back to index

glibc  2.9
getsockname.c
Go to the documentation of this file.
00001 /* Copyright (C) 1992, 1994, 1997, 1999, 2002 Free Software Foundation, Inc.
00002    This file is part of the GNU C Library.
00003 
00004    The GNU C Library is free software; you can redistribute it and/or
00005    modify it under the terms of the GNU Lesser General Public
00006    License as published by the Free Software Foundation; either
00007    version 2.1 of the License, or (at your option) any later version.
00008 
00009    The GNU C Library is distributed in the hope that it will be useful,
00010    but WITHOUT ANY WARRANTY; without even the implied warranty of
00011    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00012    Lesser General Public License for more details.
00013 
00014    You should have received a copy of the GNU Lesser General Public
00015    License along with the GNU C Library; if not, write to the Free
00016    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00017    02111-1307 USA.  */
00018 
00019 #include <errno.h>
00020 #include <string.h>
00021 #include <sys/socket.h>
00022 #include <hurd.h>
00023 #include <hurd/fd.h>
00024 #include <hurd/socket.h>
00025 
00026 /* Put the local address of FD into *ADDR and its length in *LEN.  */
00027 int
00028 __getsockname (fd, addrarg, len)
00029      int fd;
00030      __SOCKADDR_ARG addrarg;
00031      socklen_t *len;
00032 {
00033   error_t err;
00034   struct sockaddr *addr = addrarg.__sockaddr__;
00035   char *buf = (char *) addr;
00036   mach_msg_type_number_t buflen = *len;
00037   int type;
00038   addr_port_t aport;
00039 
00040   if (err = HURD_DPORT_USE (fd, __socket_name (port, &aport)))
00041     return __hurd_dfail (fd, err);
00042 
00043   err = __socket_whatis_address (aport, &type, &buf, &buflen);
00044   __mach_port_deallocate (__mach_task_self (), aport);
00045 
00046   if (err)
00047     return __hurd_dfail (fd, err);
00048 
00049   if (*len > buflen)
00050     *len = buflen;
00051   
00052   if (buf != (char *) addr)
00053     {
00054       memcpy (addr, buf, *len);
00055       __vm_deallocate (__mach_task_self (), (vm_address_t) buf, buflen);
00056     }
00057 
00058   addr->sa_family = type;
00059 
00060   return 0;
00061 }
00062 
00063 weak_alias (__getsockname, getsockname)