From 28f540f45bbacd939bfd07f213bcad2bf730b1bf Mon Sep 17 00:00:00 2001 From: Roland McGrath Date: Sat, 18 Feb 1995 01:27:10 +0000 Subject: initial import --- sysdeps/mach/hurd/recvfrom.c | 85 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 85 insertions(+) create mode 100644 sysdeps/mach/hurd/recvfrom.c (limited to 'sysdeps/mach/hurd/recvfrom.c') diff --git a/sysdeps/mach/hurd/recvfrom.c b/sysdeps/mach/hurd/recvfrom.c new file mode 100644 index 0000000000..09d45c7cc8 --- /dev/null +++ b/sysdeps/mach/hurd/recvfrom.c @@ -0,0 +1,85 @@ +/* Copyright (C) 1994 Free Software Foundation, Inc. +This file is part of the GNU C Library. + +The GNU C Library is free software; you can redistribute it and/or +modify it under the terms of the GNU Library General Public License as +published by the Free Software Foundation; either version 2 of the +License, or (at your option) any later version. + +The GNU C Library is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +Library General Public License for more details. + +You should have received a copy of the GNU Library General Public +License along with the GNU C Library; see the file COPYING.LIB. If +not, write to the Free Software Foundation, Inc., 675 Mass Ave, +Cambridge, MA 02139, USA. */ + +#include +#include +#include +#include +#include +#include +#include + +/* Read N bytes into BUF through socket FD from peer + at address ADDR (which is ADDR_LEN bytes long). + Returns the number read or -1 for errors. */ +int +DEFUN(recvfrom, (fd, buf, n, flags, addr, addr_len), + int fd AND PTR buf AND size_t n AND int flags AND + struct sockaddr *addr AND size_t *addr_len) +{ + error_t err; + mach_port_t addrport; + char *bufp = buf; + mach_msg_type_number_t nread = n; + mach_port_t *ports; + mach_msg_type_number_t nports; + char *cdata = NULL; + mach_msg_type_number_t clen = 0; + + if (err = HURD_DPORT_USE (fd, __socket_recv (port, &addrport, + flags, &bufp, &nread, + &ports, &nports, + &cdata, &clen, + &flags, + n))) + return __hurd_dfail (fd, err); + + /* Get address data for the returned address port. */ + { + char *buf = (char *) addr; + mach_msg_type_number_t buflen = *addr_len; + int type; + + err = __socket_whatis_address (addrport, &type, &buf, &buflen); + __mach_port_deallocate (__mach_task_self (), addrport); + if (err) + return __hurd_dfail (fd, err); + + if (buf != (char *) addr) + { + if (*addr_len < buflen) + *addr_len = buflen; + memcpy (addr, buf, *addr_len); + __vm_deallocate (__mach_task_self (), (vm_address_t) buf, buflen); + } + + addr->sa_family = type; + } + + /* Toss control data; we don't care. */ + __vm_deallocate (__mach_task_self (), (vm_address_t) cdata, clen); + + if (bufp != buf) + { + memcpy (buf, bufp, nread); + __vm_deallocate (__mach_task_self (), (vm_address_t) bufp, nread); + } + + return nread; +} + -- cgit v1.2.3