1 /*- 2 * Copyright (c) 2010-2011 Monthadar Al Jaberi, TerraNet AB 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer, 10 * without modification. 11 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 12 * similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any 13 * redistribution must be conditioned upon including a substantially 14 * similar Disclaimer requirement for further binary redistribution. 15 * 16 * NO WARRANTY 17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 18 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 19 * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY 20 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL 21 * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, 22 * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 23 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 24 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER 25 * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 26 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 27 * THE POSSIBILITY OF SUCH DAMAGES. 28 * 29 * $FreeBSD$ 30 */ 31 #include <sys/param.h> 32 #include <sys/module.h> 33 #include <sys/kernel.h> 34 #include <sys/systm.h> 35 #include <sys/sysctl.h> 36 #include <sys/mbuf.h> 37 #include <sys/malloc.h> 38 #include <sys/lock.h> 39 #include <sys/mutex.h> 40 #include <sys/proc.h> 41 #include <sys/ucred.h> 42 #include <sys/jail.h> 43 44 #include <sys/sockio.h> 45 #include <sys/socket.h> 46 #include <sys/socketvar.h> 47 #include <sys/errno.h> 48 #include <sys/callout.h> 49 #include <sys/endian.h> 50 #include <sys/kthread.h> 51 #include <sys/taskqueue.h> 52 #include <sys/priv.h> 53 #include <sys/sysctl.h> 54 55 #include <machine/bus.h> 56 57 #include <net/if.h> 58 #include <net/if_dl.h> 59 #include <net/if_media.h> 60 #include <net/if_types.h> 61 #include <net/if_arp.h> 62 #include <net/ethernet.h> 63 #include <net/if_llc.h> 64 #include <net/vnet.h> 65 66 #include <net80211/ieee80211_var.h> 67 #include <net80211/ieee80211_regdomain.h> 68 69 #include <net/bpf.h> 70 71 72 #include <sys/errno.h> 73 #include <sys/conf.h> /* cdevsw struct */ 74 #include <sys/uio.h> /* uio struct */ 75 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 } 132 133 134 /* The function called at load/unload. */ 135 static int 136 event_handler(module_t module, int event, void *arg) 137 { 138 struct visibility_plugin *plugin; 139 int e = 0; /* Error, 0 for normal return status */ 140 141 switch (event) { 142 case MOD_LOAD: 143 sdev = make_dev(&wtap_cdevsw,0,UID_ROOT, 144 GID_WHEEL,0600,(const char *)"wtapctl"); 145 hal = (struct wtap_hal *)malloc(sizeof(struct wtap_hal), 146 M_WTAP, M_NOWAIT | M_ZERO); 147 bzero(hal, sizeof(struct wtap_hal)); 148 149 init_hal(hal); 150 151 /* Setting up a simple plugin */ 152 plugin = (struct visibility_plugin *)malloc 153 (sizeof(struct visibility_plugin), M_WTAP_PLUGIN, 154 M_NOWAIT | M_ZERO); 155 plugin->base.wp_hal = hal; 156 plugin->base.init = visibility_init; 157 plugin->base.deinit = visibility_deinit; 158 plugin->base.work = visibility_work; 159 register_plugin(hal, (struct wtap_plugin *)plugin); 160 161 printf("Loaded wtap wireless simulator\n"); 162 break; 163 case MOD_UNLOAD: 164 destroy_dev(sdev); 165 deregister_plugin(hal); 166 deinit_hal(hal); 167 free(hal, M_WTAP); 168 printf("Unloading wtap wireless simulator\n"); 169 break; 170 default: 171 e = EOPNOTSUPP; /* Error, Operation Not Supported */ 172 break; 173 } 174 175 return(e); 176 } 177 178 /* The second argument of DECLARE_MODULE. */ 179 static moduledata_t wtap_conf = { 180 "wtap", /* module name */ 181 event_handler, /* event handler */ 182 NULL /* extra data */ 183 }; 184 185 DECLARE_MODULE(wtap, wtap_conf, SI_SUB_DRIVERS, SI_ORDER_MIDDLE); 186 MODULE_DEPEND(wtap, wlan, 1, 1, 1); /* 802.11 media layer */ 187