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86 lines
2.5 KiB
C
86 lines
2.5 KiB
C
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/* Copyright (C) 1994 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If
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not, write to the Free Software Foundation, Inc., 675 Mass Ave,
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Cambridge, MA 02139, USA. */
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#include <ansidecl.h>
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#include <errno.h>
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#include <sys/socket.h>
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#include <hurd.h>
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#include <hurd/fd.h>
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#include <hurd/socket.h>
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#include <string.h>
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/* Read N bytes into BUF through socket FD from peer
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at address ADDR (which is ADDR_LEN bytes long).
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Returns the number read or -1 for errors. */
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int
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DEFUN(recvfrom, (fd, buf, n, flags, addr, addr_len),
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int fd AND PTR buf AND size_t n AND int flags AND
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struct sockaddr *addr AND size_t *addr_len)
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{
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error_t err;
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mach_port_t addrport;
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char *bufp = buf;
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mach_msg_type_number_t nread = n;
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mach_port_t *ports;
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mach_msg_type_number_t nports;
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char *cdata = NULL;
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mach_msg_type_number_t clen = 0;
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if (err = HURD_DPORT_USE (fd, __socket_recv (port, &addrport,
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flags, &bufp, &nread,
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&ports, &nports,
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&cdata, &clen,
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&flags,
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n)))
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return __hurd_dfail (fd, err);
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/* Get address data for the returned address port. */
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{
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char *buf = (char *) addr;
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mach_msg_type_number_t buflen = *addr_len;
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int type;
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err = __socket_whatis_address (addrport, &type, &buf, &buflen);
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__mach_port_deallocate (__mach_task_self (), addrport);
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if (err)
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return __hurd_dfail (fd, err);
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if (buf != (char *) addr)
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{
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if (*addr_len < buflen)
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*addr_len = buflen;
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memcpy (addr, buf, *addr_len);
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__vm_deallocate (__mach_task_self (), (vm_address_t) buf, buflen);
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}
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addr->sa_family = type;
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}
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/* Toss control data; we don't care. */
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__vm_deallocate (__mach_task_self (), (vm_address_t) cdata, clen);
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if (bufp != buf)
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{
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memcpy (buf, bufp, nread);
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__vm_deallocate (__mach_task_self (), (vm_address_t) bufp, nread);
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}
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return nread;
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}
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