sysdeps/mach/hurd/accept.c

   1 /* Copyright (C) 1992,1993,1994,1997,1999,2002 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 <fcntl.h>
  21 #include <string.h>
  22 #include <sys/socket.h>
  23 #include <hurd.h>
  24 #include <hurd/fd.h>
  25 #include <hurd/socket.h>
  26
  27 /* Await a connection on socket FD.
  28    When a connection arrives, open a new socket to communicate with it,
  29    set *ADDR (which is *ADDR_LEN bytes long) to the address of the connecting
  30    peer and *ADDR_LEN to the address's actual length, and return the
  31    new socket's descriptor, or -1 for errors.  */
  32 int
  33 accept (fd, addrarg, addr_len)
  34       int fd;
  35       __SOCKADDR_ARG addrarg;
  36       socklen_t *addr_len;
  37 {
  38   error_t err;
  39   socket_t new;
  40   addr_port_t aport;
  41   struct sockaddr *addr = addrarg.__sockaddr__;
  42   char *buf = (char *) addr;
  43   mach_msg_type_number_t buflen;
  44   int type;
  45
  46   if (err = HURD_DPORT_USE (fd, __socket_accept (port, &new, &aport)))
  47     return __hurd_dfail (fd, err);
  48
  49   if (addr != NULL)
  50     {
  51       buflen = *addr_len;
  52       err = __socket_whatis_address (aport, &type, &buf, &buflen);
  53       if (err == EOPNOTSUPP)
  54         /* If the protocol server can't tell us the address, just return a
  55            zero-length one.  */
  56         {
  57           buf = (char *)addr;
  58           buflen = 0;
  59           err = 0;
  60         }
  61     }
  62   __mach_port_deallocate (__mach_task_self (), aport);
  63
  64   if (err)
  65     {
  66       __mach_port_deallocate (__mach_task_self (), new);
  67       return __hurd_dfail (fd, err);
  68     }
  69
  70   if (addr != NULL)
  71     {
  72       if (*addr_len > buflen)
  73         *addr_len = buflen;
  74
  75       if (buf != (char *) addr)
  76         {
  77           memcpy (addr, buf, *addr_len);
  78           __vm_deallocate (__mach_task_self (), (vm_address_t) buf, buflen);
  79         }
  80
  81       if (buflen > 0)
  82         addr->sa_family = type;
  83     }
  84
  85   return _hurd_intern_fd (new, O_IGNORE_CTTY, 1);
  86 }
  87 libc_hidden_def (accept)