diff options
Diffstat (limited to 'sysdeps/mach/hurd/recvmsg.c')
| -rw-r--r-- | sysdeps/mach/hurd/recvmsg.c | 146 |
1 files changed, 0 insertions, 146 deletions
diff --git a/sysdeps/mach/hurd/recvmsg.c b/sysdeps/mach/hurd/recvmsg.c deleted file mode 100644 index 59038dd6d6..0000000000 --- a/sysdeps/mach/hurd/recvmsg.c +++ /dev/null @@ -1,146 +0,0 @@ -/* Copyright (C) 2001-2017 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 Lesser General Public License as - published by the Free Software Foundation; either version 2.1 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 - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; see the file COPYING.LIB. If - not, see <http://www.gnu.org/licenses/>. */ - -#include <errno.h> -#include <string.h> -#include <sys/socket.h> - -#include <hurd.h> -#include <hurd/fd.h> -#include <hurd/socket.h> - -/* Receive a message as described by MESSAGE from socket FD. - Returns the number of bytes read or -1 for errors. */ -ssize_t -__libc_recvmsg (int fd, struct msghdr *message, int flags) -{ - error_t err; - addr_port_t aport; - char *data = NULL; - mach_msg_type_number_t len = 0; - mach_port_t *ports; - mach_msg_type_number_t nports = 0; - char *cdata = NULL; - mach_msg_type_number_t clen = 0; - size_t amount; - char *buf; - int i; - - /* Find the total number of bytes to be read. */ - amount = 0; - for (i = 0; i < message->msg_iovlen; i++) - { - amount += message->msg_iov[i].iov_len; - - /* As an optimization, we set the initial values of DATA and LEN - from the first non-empty iovec. This kicks-in in the case - where the whole packet fits into that iovec buffer. */ - if (data == NULL && message->msg_iov[i].iov_len > 0) - { - data = message->msg_iov[i].iov_base; - len = message->msg_iov[i].iov_len; - } - } - - buf = data; - if (err = HURD_DPORT_USE (fd, __socket_recv (port, &aport, - flags, &data, &len, - &ports, &nports, - &cdata, &clen, - &message->msg_flags, amount))) - return __hurd_sockfail (fd, flags, err); - - if (message->msg_name != NULL && aport != MACH_PORT_NULL) - { - char *buf = message->msg_name; - mach_msg_type_number_t buflen = message->msg_namelen; - int type; - - err = __socket_whatis_address (aport, &type, &buf, &buflen); - if (err == EOPNOTSUPP) - /* If the protocol server can't tell us the address, just return a - zero-length one. */ - { - buf = message->msg_name; - buflen = 0; - err = 0; - } - - if (err) - { - __mach_port_deallocate (__mach_task_self (), aport); - return __hurd_sockfail (fd, flags, err); - } - - if (message->msg_namelen > buflen) - message->msg_namelen = buflen; - - if (buf != message->msg_name) - { - memcpy (message->msg_name, buf, message->msg_namelen); - __vm_deallocate (__mach_task_self (), (vm_address_t) buf, buflen); - } - - if (buflen > 0) - ((struct sockaddr *) message->msg_name)->sa_family = type; - } - else if (message->msg_name != NULL) - message->msg_namelen = 0; - - __mach_port_deallocate (__mach_task_self (), aport); - - if (buf == data) - buf += len; - else - { - /* Copy the data into MSG. */ - if (len > amount) - message->msg_flags |= MSG_TRUNC; - else - amount = len; - - buf = data; - for (i = 0; i < message->msg_iovlen; i++) - { -#define min(a, b) ((a) > (b) ? (b) : (a)) - size_t copy = min (message->msg_iov[i].iov_len, amount); - - memcpy (message->msg_iov[i].iov_base, buf, copy); - - buf += copy; - amount -= copy; - if (len == 0) - break; - } - - __vm_deallocate (__mach_task_self (), (vm_address_t) data, len); - } - - /* Copy the control message into MSG. */ - if (clen > message->msg_controllen) - message->msg_flags |= MSG_CTRUNC; - else - message->msg_controllen = clen; - memcpy (message->msg_control, cdata, message->msg_controllen); - - __vm_deallocate (__mach_task_self (), (vm_address_t) cdata, clen); - - return (buf - data); -} - -weak_alias (__libc_recvmsg, recvmsg) -weak_alias (__libc_recvmsg, __recvmsg) |