04d1980289
This introduces: * a basic wtap interface * a HAL, which implements an abstraction layer for implementing different device behavious; * A visibility plugin, which allows for control over which nodes see other nodes (useful for mesh work.) It doesn't yet implement sta/adhoc/hostap modes but these are quite feasible to implement. Monthadar uses it to do 802.11s mesh verification. The userland tools will be committed in a follow-up commit. Submitted by: Monthadar Al Jaberi <monthadar@gmail.com>
214 lines
5.8 KiB
C
214 lines
5.8 KiB
C
/*-
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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 "hal.h"
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#include "../if_medium.h"
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#include "handler.h"
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static void
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hal_tx_proc(void *arg, int npending)
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{
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struct wtap_hal *hal = (struct wtap_hal *)arg;
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struct packet *p;
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#if 0
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DWTAP_PRINTF("%s\n", __func__);
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#endif
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hal = (struct wtap_hal *)arg;
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for(;;){
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p = medium_get_next_packet(hal->hal_md);
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if(p == NULL)
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return;
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hal->plugin->work(hal->plugin, p);
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#if 0
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DWTAP_PRINTF("[%d] freeing m=%p\n", p->id, p->m);
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#endif
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m_free(p->m);
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free(p, M_WTAP_PACKET);
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}
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}
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void
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init_hal(struct wtap_hal *hal)
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{
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DWTAP_PRINTF("%s\n", __func__);
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mtx_init(&hal->hal_mtx, "wtap_hal mtx", NULL, MTX_DEF | MTX_RECURSE);
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hal->hal_md = (struct wtap_medium *)malloc(sizeof(struct wtap_medium),
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M_WTAP, M_NOWAIT | M_ZERO);
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bzero(hal->hal_md, sizeof(struct wtap_medium));
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init_medium(hal->hal_md);
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/* register event handler for packets */
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TASK_INIT(&hal->hal_md->tx_handler->proc, 0, hal_tx_proc, hal);
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}
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void
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register_plugin(struct wtap_hal *hal, struct wtap_plugin *plugin)
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{
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plugin->init(plugin);
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hal->plugin = plugin;
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}
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void
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deregister_plugin(struct wtap_hal *hal)
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{
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hal->plugin->deinit(hal->plugin);
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hal->plugin = NULL; /* catch illegal usages */
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}
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void
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deinit_hal(struct wtap_hal *hal)
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{
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DWTAP_PRINTF("%s\n", __func__);
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deinit_medium(hal->hal_md);
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free(hal->hal_md, M_WTAP);
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mtx_destroy(&hal->hal_mtx);
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}
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int32_t
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new_wtap(struct wtap_hal *hal, int32_t id)
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{
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static const uint8_t mac_pool[64][IEEE80211_ADDR_LEN] = {
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{0,152,154,152,150,151},
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{0,152,154,152,150,152},
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{0,152,154,152,150,153},
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{0,152,154,152,150,154},
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{0,152,154,152,150,155},
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{0,152,154,152,150,156},
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{0,152,154,152,150,157},
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{0,152,154,152,150,158},
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{0,152,154,152,151,151},
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{0,152,154,152,151,152},
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{0,152,154,152,151,153},
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{0,152,154,152,151,154},
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{0,152,154,152,151,155},
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{0,152,154,152,151,156},
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{0,152,154,152,151,157},
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{0,152,154,152,151,158},
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{0,152,154,152,152,151},
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{0,152,154,152,152,152},
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{0,152,154,152,152,153},
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{0,152,154,152,152,154},
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{0,152,154,152,152,155},
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{0,152,154,152,152,156},
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{0,152,154,152,152,157},
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{0,152,154,152,152,158},
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{0,152,154,152,153,151},
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{0,152,154,152,153,152},
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{0,152,154,152,153,153},
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{0,152,154,152,153,154},
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{0,152,154,152,153,155},
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{0,152,154,152,153,156},
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{0,152,154,152,153,157},
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{0,152,154,152,153,158},
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{0,152,154,152,154,151},
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{0,152,154,152,154,152},
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{0,152,154,152,154,153},
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{0,152,154,152,154,154},
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{0,152,154,152,154,155},
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{0,152,154,152,154,156},
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{0,152,154,152,154,157},
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{0,152,154,152,154,158},
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{0,152,154,152,155,151},
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{0,152,154,152,155,152},
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{0,152,154,152,155,153},
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{0,152,154,152,155,154},
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{0,152,154,152,155,155},
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{0,152,154,152,155,156},
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{0,152,154,152,155,157},
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{0,152,154,152,155,158},
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{0,152,154,152,156,151},
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{0,152,154,152,156,152},
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{0,152,154,152,156,153},
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{0,152,154,152,156,154},
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{0,152,154,152,156,155},
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{0,152,154,152,156,156},
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{0,152,154,152,156,157},
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{0,152,154,152,156,158},
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{0,152,154,152,157,151},
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{0,152,154,152,157,152},
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{0,152,154,152,157,153},
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{0,152,154,152,157,154},
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{0,152,154,152,157,155},
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{0,152,154,152,157,156},
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{0,152,154,152,157,157},
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{0,152,154,152,157,158}
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};
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DWTAP_PRINTF("%s\n", __func__);
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uint8_t const *macaddr = mac_pool[id];
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if(hal->hal_devs[id] != NULL){
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printf("error, wtap_id=%d already created\n", id);
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return -1;
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}
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hal->hal_devs[id] = (struct wtap_softc *)malloc(
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sizeof(struct wtap_softc), M_WTAP, M_NOWAIT | M_ZERO);
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bzero(hal->hal_devs[id], sizeof(struct wtap_softc));
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hal->hal_devs[id]->sc_md = hal->hal_md;
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hal->hal_devs[id]->id = id;
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mtx_init(&hal->hal_devs[id]->sc_mtx, "wtap_softc mtx", NULL,
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MTX_DEF | MTX_RECURSE);
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if(wtap_attach(hal->hal_devs[id], macaddr)){
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printf("%s, cant alloc new wtap\n", __func__);
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return -1;
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}
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return 0;
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}
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int32_t
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free_wtap(struct wtap_hal *hal, int32_t id)
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{
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DWTAP_PRINTF("%s\n", __func__);
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if(hal->hal_devs[id] == NULL){
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printf("error, wtap_id=%d never created\n", id);
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return -1;
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}
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if(wtap_detach(hal->hal_devs[id]))
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printf("%s, cant alloc new wtap\n", __func__);
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mtx_destroy(&hal->hal_devs[id]->sc_mtx);
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free(hal->hal_devs[id], M_WTAP);
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hal->hal_devs[id] = NULL;
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return 0;
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}
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