mirror of
http://git.haproxy.org/git/haproxy.git/
synced 2024-12-12 06:24:56 +00:00
78 lines
2.1 KiB
C
78 lines
2.1 KiB
C
|
/*
|
||
|
|
include/proto/port_range.h
|
||
|
|
This file defines everything needed to manage port ranges
|
||
|
|
|
||
|
|
Copyright (C) 2000-2009 Willy Tarreau - w@1wt.eu
|
||
|
|
|
||
|
|
This 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, version 2.1
|
||
|
|
exclusively.
|
||
|
|
|
||
|
|
This 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 this library; if not, write to the Free Software
|
||
|
|
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef _PROTO_PORT_RANGE_H
|
||
|
|
#define _PROTO_PORT_RANGE_H
|
||
|
|
|
||
|
|
#include <types/port_range.h>
|
||
|
|
|
||
|
|
/* return an available port from range <range>, or zero if none is left */
|
||
|
|
static inline int port_range_alloc_port(struct port_range *range)
|
||
|
|
{
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
if (!range->avail)
|
||
|
|
return 0;
|
||
|
|
ret = range->ports[range->get];
|
||
|
|
range->get++;
|
||
|
|
if (range->get >= range->size)
|
||
|
|
range->get = 0;
|
||
|
|
range->avail--;
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* release port <port> into port range <range>. Does nothing if <port> is zero
|
||
|
|
* nor if <range> is null. The caller is responsible for marking the port
|
||
|
|
* unused by either setting the port to zero or the range to NULL.
|
||
|
|
*/
|
||
|
|
static inline void port_range_release_port(struct port_range *range, int port)
|
||
|
|
{
|
||
|
|
if (!port || !range)
|
||
|
|
return;
|
||
|
|
|
||
|
|
range->ports[range->put] = port;
|
||
|
|
range->avail++;
|
||
|
|
range->put++;
|
||
|
|
if (range->put >= range->size)
|
||
|
|
range->put = 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* return a new initialized port range of N ports. The ports are not
|
||
|
|
* filled in, it's up to the caller to do it.
|
||
|
|
*/
|
||
|
|
static inline struct port_range *port_range_alloc_range(int n)
|
||
|
|
{
|
||
|
|
struct port_range *ret;
|
||
|
|
ret = calloc(1, sizeof(struct port_range) +
|
||
|
|
n * sizeof(((struct port_range *)0)->ports[0]));
|
||
|
|
ret->size = ret->avail = n;
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif /* _PROTO_PORT_RANGE_H */
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Local variables:
|
||
|
|
* c-indent-level: 8
|
||
|
|
* c-basic-offset: 8
|
||
|
|
* End:
|
||
|
|
*/
|