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/*
* Copyright (C) 2014 Linux Test Project, Inc.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of version 2 of the GNU General Public
* License as published by the Free Software Foundation.
*
* This program is distributed in the hope that it would be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
*
* Further, this software is distributed without any warranty that it
* is free of the rightful claim of any third person regarding
* infringement or the like. Any license provided herein, whether
* implied or otherwise, applies only to this software file. Patent
* licenses, if any, provided herein do not apply to combinations of
* this program with other software, or any other product whatsoever.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write the Free Software Foundation, Inc.
*/
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include "test.h"
unsigned short tst_get_unused_port(void (cleanup_fn)(void),
unsigned short family, int type)
{
int sock;
socklen_t slen;
struct sockaddr_storage _addr;
struct sockaddr *addr = (struct sockaddr *)&_addr;
struct sockaddr_in *addr4 = (struct sockaddr_in *)addr;
struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)addr;
switch (family) {
case AF_INET:
addr4->sin_family = AF_INET;
addr4->sin_port = 0;
addr4->sin_addr.s_addr = INADDR_ANY;
slen = sizeof(*addr4);
break;
case AF_INET6:
addr6->sin6_family = AF_INET6;
addr6->sin6_port = 0;
addr6->sin6_addr = in6addr_any;
slen = sizeof(*addr6);
break;
default:
tst_brkm(TBROK, cleanup_fn,
"tst_get_unused_port unknown family");
}
sock = socket(addr->sa_family, type, 0);
if (sock < 0)
tst_brkm(TBROK | TERRNO, cleanup_fn, "socket failed");
if (bind(sock, addr, slen) < 0)
tst_brkm(TBROK | TERRNO, cleanup_fn, "bind failed");
if (getsockname(sock, addr, &slen) == -1)
tst_brkm(TBROK | TERRNO, cleanup_fn, "getsockname failed");
if (close(sock) == -1)
tst_brkm(TBROK | TERRNO, cleanup_fn, "close failed");
switch (family) {
case AF_INET:
return addr4->sin_port;
case AF_INET6:
return addr6->sin6_port;
default:
return -1;
}
}
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