718cf2ccb9
Mainly focus on files that use BSD 2-Clause license, however the tool I was using misidentified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts.
123 lines
3.4 KiB
C
123 lines
3.4 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2010-2011 Monthadar Al Jaberi, TerraNet AB
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
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* redistribution must be conditioned upon including a substantially
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* similar Disclaimer requirement for further binary redistribution.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
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* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY,
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* OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
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* IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGES.
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*
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* $FreeBSD$
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*/
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#include "if_wtapvar.h"
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#include "if_medium.h"
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void
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init_medium(struct wtap_medium *md)
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{
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DWTAP_PRINTF("%s\n", __func__);
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STAILQ_INIT(&md->md_pktbuf);
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mtx_init(&md->md_mtx, "wtap_medium mtx", NULL, MTX_DEF | MTX_RECURSE);
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/* Event handler for sending packets between wtaps */
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struct eventhandler *eh = (struct eventhandler *)
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malloc(sizeof(struct eventhandler), M_WTAP, M_NOWAIT | M_ZERO);
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eh->tq = taskqueue_create("wtap_tx_taskq", M_NOWAIT | M_ZERO,
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taskqueue_thread_enqueue, &eh->tq);
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taskqueue_start_threads(&eh->tq, 1, PI_NET, "%s taskq", "wtap_medium");
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md->tx_handler = eh;
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/* Mark medium closed by default */
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md->open = 0;
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}
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void
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deinit_medium(struct wtap_medium *md)
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{
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DWTAP_PRINTF("%s\n", __func__);
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taskqueue_free(md->tx_handler->tq);
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free(md->tx_handler, M_WTAP);
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}
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int
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medium_transmit(struct wtap_medium *md, int id, struct mbuf*m)
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{
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mtx_lock(&md->md_mtx);
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if (md->open == 0){
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DWTAP_PRINTF("[%d] dropping m=%p\n", id, m);
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m_free(m);
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mtx_unlock(&md->md_mtx);
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return 0;
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}
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DWTAP_PRINTF("[%d] transmiting m=%p\n", id, m);
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struct packet *p = (struct packet *)malloc(sizeof(struct packet),
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M_WTAP_PACKET, M_ZERO | M_NOWAIT);
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p->id = id;
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p->m = m;
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STAILQ_INSERT_TAIL(&md->md_pktbuf, p, pf_list);
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taskqueue_enqueue(md->tx_handler->tq, &md->tx_handler->proc);
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mtx_unlock(&md->md_mtx);
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return 0;
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}
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struct packet *
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medium_get_next_packet(struct wtap_medium *md)
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{
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struct packet *p;
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mtx_lock(&md->md_mtx);
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p = STAILQ_FIRST(&md->md_pktbuf);
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if (p == NULL){
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mtx_unlock(&md->md_mtx);
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return NULL;
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}
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STAILQ_REMOVE_HEAD(&md->md_pktbuf, pf_list);
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mtx_unlock(&md->md_mtx);
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return p;
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}
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void
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medium_open(struct wtap_medium *md)
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{
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mtx_lock(&md->md_mtx);
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md->open = 1;
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mtx_unlock(&md->md_mtx);
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}
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void
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medium_close(struct wtap_medium *md)
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{
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mtx_lock(&md->md_mtx);
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md->open = 0;
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mtx_unlock(&md->md_mtx);
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}
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