mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-27 15:30:07 +00:00
acb527929d
This includes bindresvport and the NSS-related RPC functions. This will simplify the removal of the sunrpc functionality because these functions no longer have to be treated specially.
111 lines
3.1 KiB
C
111 lines
3.1 KiB
C
/*
|
|
* Copyright (c) 2010, Oracle America, Inc.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions are
|
|
* met:
|
|
*
|
|
* * Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* * Redistributions in binary form must reproduce the above
|
|
* copyright notice, this list of conditions and the following
|
|
* disclaimer in the documentation and/or other materials
|
|
* provided with the distribution.
|
|
* * Neither the name of the "Oracle America, Inc." nor the names of its
|
|
* contributors may be used to endorse or promote products derived
|
|
* from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
|
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
|
|
* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
|
|
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
|
|
* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
|
|
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
|
|
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#include <errno.h>
|
|
#include <unistd.h>
|
|
#include <string.h>
|
|
#include <sys/types.h>
|
|
#include <sys/socket.h>
|
|
#include <netinet/in.h>
|
|
#include <libc-lock.h>
|
|
|
|
/*
|
|
* Locks the static variables in this file.
|
|
*/
|
|
__libc_lock_define_initialized (static, lock);
|
|
|
|
/*
|
|
* Bind a socket to a privileged IP port
|
|
*/
|
|
int
|
|
bindresvport (int sd, struct sockaddr_in *sin)
|
|
{
|
|
static short port;
|
|
struct sockaddr_in myaddr;
|
|
int i;
|
|
|
|
#define STARTPORT 600
|
|
#define LOWPORT 512
|
|
#define ENDPORT (IPPORT_RESERVED - 1)
|
|
#define NPORTS (ENDPORT - STARTPORT + 1)
|
|
static short startport = STARTPORT;
|
|
|
|
if (sin == (struct sockaddr_in *) 0)
|
|
{
|
|
sin = &myaddr;
|
|
memset (sin, 0, sizeof (*sin));
|
|
sin->sin_family = AF_INET;
|
|
}
|
|
else if (sin->sin_family != AF_INET)
|
|
{
|
|
__set_errno (EAFNOSUPPORT);
|
|
return -1;
|
|
}
|
|
|
|
if (port == 0)
|
|
{
|
|
port = (__getpid () % NPORTS) + STARTPORT;
|
|
}
|
|
|
|
/* Initialize to make gcc happy. */
|
|
int res = -1;
|
|
|
|
int nports = ENDPORT - startport + 1;
|
|
int endport = ENDPORT;
|
|
|
|
__libc_lock_lock (lock);
|
|
|
|
again:
|
|
for (i = 0; i < nports; ++i)
|
|
{
|
|
sin->sin_port = htons (port++);
|
|
if (port > endport)
|
|
port = startport;
|
|
res = __bind (sd, sin, sizeof (struct sockaddr_in));
|
|
if (res >= 0 || errno != EADDRINUSE)
|
|
break;
|
|
}
|
|
|
|
if (i == nports && startport != LOWPORT)
|
|
{
|
|
startport = LOWPORT;
|
|
endport = STARTPORT - 1;
|
|
nports = STARTPORT - LOWPORT;
|
|
port = LOWPORT + port % (STARTPORT - LOWPORT);
|
|
goto again;
|
|
}
|
|
|
|
__libc_lock_unlock (lock);
|
|
|
|
return res;
|
|
}
|
|
libc_hidden_def (bindresvport)
|