mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-22 21:10:07 +00:00
3a0cd663c2
If we tried looking at the usual range without success extend the range to even lower ports.q
98 lines
2.5 KiB
C
98 lines
2.5 KiB
C
/*
|
|
* Sun RPC is a product of Sun Microsystems, Inc. and is provided for
|
|
* unrestricted use provided that this legend is included on all tape
|
|
* media and as a part of the software program in whole or part. Users
|
|
* may copy or modify Sun RPC without charge, but are not authorized
|
|
* to license or distribute it to anyone else except as part of a product or
|
|
* program developed by the user.
|
|
*
|
|
* SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
|
|
* WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
|
|
* PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
|
|
*
|
|
* Sun RPC is provided with no support and without any obligation on the
|
|
* part of Sun Microsystems, Inc. to assist in its use, correction,
|
|
* modification or enhancement.
|
|
*
|
|
* SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
|
|
* INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
|
|
* OR ANY PART THEREOF.
|
|
*
|
|
* In no event will Sun Microsystems, Inc. be liable for any lost revenue
|
|
* or profits or other special, indirect and consequential damages, even if
|
|
* Sun has been advised of the possibility of such damages.
|
|
*
|
|
* Sun Microsystems, Inc.
|
|
* 2550 Garcia Avenue
|
|
* Mountain View, California 94043
|
|
*/
|
|
/*
|
|
* Copyright (c) 1987 by Sun Microsystems, Inc.
|
|
*/
|
|
|
|
#include <errno.h>
|
|
#include <unistd.h>
|
|
#include <string.h>
|
|
#include <sys/types.h>
|
|
#include <sys/socket.h>
|
|
#include <netinet/in.h>
|
|
|
|
/*
|
|
* Bind a socket to a privileged IP port
|
|
*/
|
|
int
|
|
bindresvport (int sd, struct sockaddr_in *sin)
|
|
{
|
|
int res;
|
|
static short port;
|
|
struct sockaddr_in myaddr;
|
|
int i;
|
|
|
|
#define STARTPORT 600
|
|
#define LOWPORT 200
|
|
#define ENDPORT (IPPORT_RESERVED - 1)
|
|
#define NPORTS (ENDPORT - STARTPORT + 1)
|
|
static short startport = STARTPORT;
|
|
|
|
if (sin == (struct sockaddr_in *) 0)
|
|
{
|
|
sin = &myaddr;
|
|
__bzero (sin, sizeof (*sin));
|
|
sin->sin_family = AF_INET;
|
|
}
|
|
else if (sin->sin_family != AF_INET)
|
|
{
|
|
__set_errno (EPFNOSUPPORT);
|
|
return -1;
|
|
}
|
|
|
|
if (port == 0)
|
|
{
|
|
port = (__getpid () % NPORTS) + STARTPORT;
|
|
}
|
|
res = -1;
|
|
__set_errno (EADDRINUSE);
|
|
|
|
int nports = ENDPORT - startport + 1;
|
|
again:
|
|
for (i = 0; i < nports && res < 0 && errno == EADDRINUSE; ++i)
|
|
{
|
|
sin->sin_port = htons (port++);
|
|
if (port > ENDPORT)
|
|
{
|
|
port = startport;
|
|
}
|
|
res = __bind (sd, sin, sizeof (struct sockaddr_in));
|
|
}
|
|
|
|
if (i == nports && startport != LOWPORT)
|
|
{
|
|
startport = LOWPORT;
|
|
nports = STARTPORT - LOWPORT;
|
|
goto again;
|
|
}
|
|
|
|
return res;
|
|
}
|
|
libc_hidden_def (bindresvport)
|