1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2010-2011 Monthadar Al Jaberi, TerraNet AB 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer, 12 * without modification. 13 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 14 * similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any 15 * redistribution must be conditioned upon including a substantially 16 * similar Disclaimer requirement for further binary redistribution. 17 * 18 * NO WARRANTY 19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 21 * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY 22 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL 23 * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, 24 * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER 27 * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 29 * THE POSSIBILITY OF SUCH DAMAGES. 30 * 31 * $FreeBSD$ 32 */ 33 #include <sys/param.h> 34 #include <sys/module.h> 35 #include <sys/kernel.h> 36 #include <sys/systm.h> 37 #include <sys/sysctl.h> 38 #include <sys/mbuf.h> 39 #include <sys/malloc.h> 40 #include <sys/lock.h> 41 #include <sys/mutex.h> 42 #include <sys/proc.h> 43 #include <sys/ucred.h> 44 #include <sys/jail.h> 45 46 #include <sys/sockio.h> 47 #include <sys/socket.h> 48 #include <sys/socketvar.h> 49 #include <sys/errno.h> 50 #include <sys/callout.h> 51 #include <sys/endian.h> 52 #include <sys/kthread.h> 53 #include <sys/taskqueue.h> 54 #include <sys/priv.h> 55 #include <sys/sysctl.h> 56 57 #include <machine/bus.h> 58 59 #include <net/if.h> 60 #include <net/if_dl.h> 61 #include <net/if_media.h> 62 #include <net/if_types.h> 63 #include <net/if_arp.h> 64 #include <net/ethernet.h> 65 #include <net/if_llc.h> 66 #include <net/vnet.h> 67 68 #include <net80211/ieee80211_var.h> 69 #include <net80211/ieee80211_regdomain.h> 70 71 #include <net/bpf.h> 72 73 #include <sys/errno.h> 74 #include <sys/conf.h> /* cdevsw struct */ 75 #include <sys/uio.h> /* uio struct */ 76 77 #include <netinet/in.h> 78 #include <netinet/if_ether.h> 79 80 #include "if_wtapvar.h" 81 #include "if_wtapioctl.h" 82 #include "if_medium.h" 83 #include "wtap_hal/hal.h" 84 85 /* WTAP PLUGINS */ 86 #include "plugins/visibility.h" 87 88 MALLOC_DEFINE(M_WTAP, "wtap", "wtap wireless simulator"); 89 MALLOC_DEFINE(M_WTAP_PACKET, "wtap packet", "wtap wireless simulator packet"); 90 MALLOC_DEFINE(M_WTAP_RXBUF, "wtap rxbuf", 91 "wtap wireless simulator receive buffer"); 92 MALLOC_DEFINE(M_WTAP_PLUGIN, "wtap plugin", "wtap wireless simulator plugin"); 93 94 static struct wtap_hal *hal; 95 96 /* Function prototypes */ 97 static d_ioctl_t wtap_ioctl; 98 99 static struct cdev *sdev; 100 static struct cdevsw wtap_cdevsw = { 101 .d_version = D_VERSION, 102 .d_flags = 0, 103 .d_ioctl = wtap_ioctl, 104 .d_name = "wtapctl", 105 }; 106 107 int 108 wtap_ioctl(struct cdev *dev, u_long cmd, caddr_t data, 109 int fflag, struct thread *td) 110 { 111 int error = 0; 112 113 CURVNET_SET(CRED_TO_VNET(curthread->td_ucred)); 114 115 switch(cmd) { 116 case WTAPIOCTLCRT: 117 if(new_wtap(hal, *(int *)data)) 118 error = EINVAL; 119 break; 120 case WTAPIOCTLDEL: 121 if(free_wtap(hal, *(int *)data)) 122 error = EINVAL; 123 break; 124 default: 125 DWTAP_PRINTF("Unknown WTAP IOCTL\n"); 126 error = EINVAL; 127 } 128 129 CURVNET_RESTORE(); 130 return error; 131 } 132 133 /* The function called at load/unload. */ 134 static int 135 event_handler(module_t module, int event, void *arg) 136 { 137 struct visibility_plugin *plugin; 138 int e = 0; /* Error, 0 for normal return status */ 139 140 switch (event) { 141 case MOD_LOAD: 142 sdev = make_dev(&wtap_cdevsw,0,UID_ROOT, 143 GID_WHEEL,0600,(const char *)"wtapctl"); 144 hal = (struct wtap_hal *)malloc(sizeof(struct wtap_hal), 145 M_WTAP, M_NOWAIT | M_ZERO); 146 147 init_hal(hal); 148 149 /* Setting up a simple plugin */ 150 plugin = (struct visibility_plugin *)malloc 151 (sizeof(struct visibility_plugin), M_WTAP_PLUGIN, 152 M_NOWAIT | M_ZERO); 153 plugin->base.wp_hal = hal; 154 plugin->base.init = visibility_init; 155 plugin->base.deinit = visibility_deinit; 156 plugin->base.work = visibility_work; 157 register_plugin(hal, (struct wtap_plugin *)plugin); 158 159 printf("Loaded wtap wireless simulator\n"); 160 break; 161 case MOD_UNLOAD: 162 destroy_dev(sdev); 163 deregister_plugin(hal); 164 deinit_hal(hal); 165 free(hal, M_WTAP); 166 printf("Unloading wtap wireless simulator\n"); 167 break; 168 default: 169 e = EOPNOTSUPP; /* Error, Operation Not Supported */ 170 break; 171 } 172 173 return(e); 174 } 175 176 /* The second argument of DECLARE_MODULE. */ 177 static moduledata_t wtap_conf = { 178 "wtap", /* module name */ 179 event_handler, /* event handler */ 180 NULL /* extra data */ 181 }; 182 183 DECLARE_MODULE(wtap, wtap_conf, SI_SUB_DRIVERS, SI_ORDER_MIDDLE); 184 MODULE_DEPEND(wtap, wlan, 1, 1, 1); /* 802.11 media layer */ 185