mirror of
https://github.com/freebsd/freebsd-src
synced 2024-07-22 02:37:15 +00:00
121 lines
3.3 KiB
C
121 lines
3.3 KiB
C
/*-
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*
|
|
* Copyright (c) 2010-2011 Monthadar Al Jaberi, TerraNet AB
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer,
|
|
* without modification.
|
|
* 2. Redistributions in binary form must reproduce at minimum a disclaimer
|
|
* similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
|
|
* redistribution must be conditioned upon including a substantially
|
|
* similar Disclaimer requirement for further binary redistribution.
|
|
*
|
|
* NO WARRANTY
|
|
* 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 NONINFRINGEMENT, MERCHANTIBILITY
|
|
* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
|
|
* THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR 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 DAMAGES.
|
|
*/
|
|
#include "if_wtapvar.h"
|
|
#include "if_medium.h"
|
|
|
|
void
|
|
init_medium(struct wtap_medium *md)
|
|
{
|
|
|
|
DWTAP_PRINTF("%s\n", __func__);
|
|
STAILQ_INIT(&md->md_pktbuf);
|
|
mtx_init(&md->md_mtx, "wtap_medium mtx", NULL, MTX_DEF | MTX_RECURSE);
|
|
|
|
/* Event handler for sending packets between wtaps */
|
|
struct eventhandler *eh = (struct eventhandler *)
|
|
malloc(sizeof(struct eventhandler), M_WTAP, M_NOWAIT | M_ZERO);
|
|
eh->tq = taskqueue_create("wtap_tx_taskq", M_NOWAIT | M_ZERO,
|
|
taskqueue_thread_enqueue, &eh->tq);
|
|
taskqueue_start_threads(&eh->tq, 1, PI_NET, "%s taskq", "wtap_medium");
|
|
md->tx_handler = eh;
|
|
/* Mark medium closed by default */
|
|
md->open = 0;
|
|
}
|
|
|
|
void
|
|
deinit_medium(struct wtap_medium *md)
|
|
{
|
|
|
|
DWTAP_PRINTF("%s\n", __func__);
|
|
taskqueue_free(md->tx_handler->tq);
|
|
free(md->tx_handler, M_WTAP);
|
|
}
|
|
|
|
int
|
|
medium_transmit(struct wtap_medium *md, int id, struct mbuf*m)
|
|
{
|
|
|
|
mtx_lock(&md->md_mtx);
|
|
if (md->open == 0){
|
|
DWTAP_PRINTF("[%d] dropping m=%p\n", id, m);
|
|
m_free(m);
|
|
mtx_unlock(&md->md_mtx);
|
|
return 0;
|
|
}
|
|
|
|
DWTAP_PRINTF("[%d] transmiting m=%p\n", id, m);
|
|
struct packet *p = (struct packet *)malloc(sizeof(struct packet),
|
|
M_WTAP_PACKET, M_ZERO | M_NOWAIT);
|
|
p->id = id;
|
|
p->m = m;
|
|
|
|
STAILQ_INSERT_TAIL(&md->md_pktbuf, p, pf_list);
|
|
taskqueue_enqueue(md->tx_handler->tq, &md->tx_handler->proc);
|
|
mtx_unlock(&md->md_mtx);
|
|
|
|
return 0;
|
|
}
|
|
|
|
struct packet *
|
|
medium_get_next_packet(struct wtap_medium *md)
|
|
{
|
|
struct packet *p;
|
|
|
|
mtx_lock(&md->md_mtx);
|
|
p = STAILQ_FIRST(&md->md_pktbuf);
|
|
if (p == NULL){
|
|
mtx_unlock(&md->md_mtx);
|
|
return NULL;
|
|
}
|
|
|
|
STAILQ_REMOVE_HEAD(&md->md_pktbuf, pf_list);
|
|
mtx_unlock(&md->md_mtx);
|
|
return p;
|
|
}
|
|
|
|
void
|
|
medium_open(struct wtap_medium *md)
|
|
{
|
|
|
|
mtx_lock(&md->md_mtx);
|
|
md->open = 1;
|
|
mtx_unlock(&md->md_mtx);
|
|
}
|
|
|
|
void
|
|
medium_close(struct wtap_medium *md)
|
|
{
|
|
|
|
mtx_lock(&md->md_mtx);
|
|
md->open = 0;
|
|
mtx_unlock(&md->md_mtx);
|
|
}
|