/*- * 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 #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* cdevsw struct */ #include /* uio struct */ #include #include #include "if_wtapvar.h" #include "if_wtapioctl.h" #include "if_medium.h" #include "wtap_hal/hal.h" /* WTAP PLUGINS */ #include "plugins/visibility.h" MALLOC_DEFINE(M_WTAP, "wtap", "wtap wireless simulator"); MALLOC_DEFINE(M_WTAP_PACKET, "wtap packet", "wtap wireless simulator packet"); MALLOC_DEFINE(M_WTAP_RXBUF, "wtap rxbuf", "wtap wireless simulator receive buffer"); MALLOC_DEFINE(M_WTAP_PLUGIN, "wtap plugin", "wtap wireless simulator plugin"); static struct wtap_hal *hal; /* Function prototypes */ static d_ioctl_t wtap_ioctl; static struct cdev *sdev; static struct cdevsw wtap_cdevsw = { .d_version = D_VERSION, .d_flags = 0, .d_ioctl = wtap_ioctl, .d_name = "wtapctl", }; int wtap_ioctl(struct cdev *dev, u_long cmd, caddr_t data, int fflag, struct thread *td) { int error = 0; CURVNET_SET(CRED_TO_VNET(curthread->td_ucred)); switch(cmd) { case WTAPIOCTLCRT: if(new_wtap(hal, *(int *)data)) error = EINVAL; break; case WTAPIOCTLDEL: if(free_wtap(hal, *(int *)data)) error = EINVAL; break; default: DWTAP_PRINTF("Unknown WTAP IOCTL\n"); error = EINVAL; } CURVNET_RESTORE(); return error; } /* The function called at load/unload. */ static int event_handler(module_t module, int event, void *arg) { struct visibility_plugin *plugin; int e = 0; /* Error, 0 for normal return status */ switch (event) { case MOD_LOAD: sdev = make_dev(&wtap_cdevsw,0,UID_ROOT, GID_WHEEL,0600,(const char *)"wtapctl"); hal = (struct wtap_hal *)malloc(sizeof(struct wtap_hal), M_WTAP, M_NOWAIT | M_ZERO); init_hal(hal); /* Setting up a simple plugin */ plugin = (struct visibility_plugin *)malloc (sizeof(struct visibility_plugin), M_WTAP_PLUGIN, M_NOWAIT | M_ZERO); plugin->base.wp_hal = hal; plugin->base.init = visibility_init; plugin->base.deinit = visibility_deinit; plugin->base.work = visibility_work; register_plugin(hal, (struct wtap_plugin *)plugin); printf("Loaded wtap wireless simulator\n"); break; case MOD_UNLOAD: destroy_dev(sdev); deregister_plugin(hal); deinit_hal(hal); free(hal, M_WTAP); printf("Unloading wtap wireless simulator\n"); break; default: e = EOPNOTSUPP; /* Error, Operation Not Supported */ break; } return(e); } /* The second argument of DECLARE_MODULE. */ static moduledata_t wtap_conf = { "wtap", /* module name */ event_handler, /* event handler */ NULL /* extra data */ }; DECLARE_MODULE(wtap, wtap_conf, SI_SUB_DRIVERS, SI_ORDER_MIDDLE); MODULE_DEPEND(wtap, wlan, 1, 1, 1); /* 802.11 media layer */