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glibc  2.9
sendto.c
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00001 /* Copyright (C) 1994,95,96,97,99,2001,02 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 <sys/socket.h>
00021 #include <sys/un.h>
00022 #include <hurd.h>
00023 #include <hurd/fd.h>
00024 #include <hurd/ifsock.h>
00025 #include <hurd/socket.h>
00026 
00027 /* Send N bytes of BUF on socket FD to peer at address ADDR (which is
00028    ADDR_LEN bytes long).  Returns the number sent, or -1 for errors.  */
00029 ssize_t
00030 __sendto (int fd,
00031          const void *buf,
00032          size_t n,
00033          int flags,
00034          const struct sockaddr_un *addr,
00035          socklen_t addr_len)
00036 {
00037   addr_port_t aport;
00038   error_t err;
00039   size_t wrote;
00040 
00041   if (addr->sun_family == AF_LOCAL)
00042     {
00043       /* For the local domain, we must look up the name as a file and talk
00044         to it with the ifsock protocol.  */
00045       file_t file = __file_name_lookup (addr->sun_path, 0, 0);
00046       if (file == MACH_PORT_NULL)
00047        return -1;
00048       err = __ifsock_getsockaddr (file, &aport);
00049       __mach_port_deallocate (__mach_task_self (), file);
00050       if (err == MIG_BAD_ID || err == EOPNOTSUPP)
00051        /* The file did not grok the ifsock protocol.  */
00052        err = ENOTSOCK;
00053       if (err)
00054        return __hurd_fail (err);
00055     }
00056   else
00057     err = EIEIO;
00058 
00059   /* Get an address port for the desired destination address.  */
00060   err = HURD_DPORT_USE (fd,
00061                      ({
00062                        if (err)
00063                          err = __socket_create_address (port,
00064                                                     addr->sun_family,
00065                                                     (char *) addr,
00066                                                     addr_len,
00067                                                     &aport);
00068                        if (! err)
00069                          {
00070                            /* Send the data.  */
00071                            err = __socket_send (port, aport,
00072                                              flags, buf, n,
00073                                              NULL,
00074                                              MACH_MSG_TYPE_COPY_SEND, 0,
00075                                              NULL, 0, &wrote);
00076                            __mach_port_deallocate (__mach_task_self (),
00077                                                 aport);
00078                          }
00079                        err;
00080                      }));
00081 
00082   return err ? __hurd_sockfail (fd, flags, err) : wrote;
00083 }
00084 
00085 weak_alias (__sendto, sendto)