1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 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 32 #include <sys/param.h> 33 #include <sys/module.h> 34 #include <sys/malloc.h> 35 #include <sys/jail.h> 36 37 #include <sys/socket.h> 38 39 #include <net/if.h> 40 #include <net/if_media.h> 41 #include <net/ethernet.h> 42 43 #include <netinet/in.h> 44 45 #include "if_wtapvar.h" 46 #include "if_wtapioctl.h" 47 #include "if_medium.h" 48 #include "wtap_hal/hal.h" 49 50 /* WTAP PLUGINS */ 51 #include "plugins/visibility.h" 52 53 MALLOC_DEFINE(M_WTAP, "wtap", "wtap wireless simulator"); 54 MALLOC_DEFINE(M_WTAP_PACKET, "wtap packet", "wtap wireless simulator packet"); 55 MALLOC_DEFINE(M_WTAP_RXBUF, "wtap rxbuf", 56 "wtap wireless simulator receive buffer"); 57 MALLOC_DEFINE(M_WTAP_PLUGIN, "wtap plugin", "wtap wireless simulator plugin"); 58 59 static struct wtap_hal *hal; 60 61 /* Function prototypes */ 62 static d_ioctl_t wtap_ioctl; 63 64 static struct cdev *sdev; 65 static struct cdevsw wtap_cdevsw = { 66 .d_version = D_VERSION, 67 .d_flags = 0, 68 .d_ioctl = wtap_ioctl, 69 .d_name = "wtapctl", 70 }; 71 72 int 73 wtap_ioctl(struct cdev *dev, u_long cmd, caddr_t data, 74 int fflag, struct thread *td) 75 { 76 int error = 0; 77 78 CURVNET_SET(CRED_TO_VNET(curthread->td_ucred)); 79 80 switch(cmd) { 81 case WTAPIOCTLCRT: 82 if(new_wtap(hal, *(int *)data)) 83 error = EINVAL; 84 break; 85 case WTAPIOCTLDEL: 86 if(free_wtap(hal, *(int *)data)) 87 error = EINVAL; 88 break; 89 default: 90 DWTAP_PRINTF("Unknown WTAP IOCTL\n"); 91 error = EINVAL; 92 } 93 94 CURVNET_RESTORE(); 95 return error; 96 } 97 98 /* The function called at load/unload. */ 99 static int 100 event_handler(module_t module, int event, void *arg) 101 { 102 struct visibility_plugin *plugin; 103 int e = 0; /* Error, 0 for normal return status */ 104 105 switch (event) { 106 case MOD_LOAD: 107 sdev = make_dev(&wtap_cdevsw,0,UID_ROOT, 108 GID_WHEEL,0600,(const char *)"wtapctl"); 109 hal = (struct wtap_hal *)malloc(sizeof(struct wtap_hal), 110 M_WTAP, M_NOWAIT | M_ZERO); 111 112 init_hal(hal); 113 114 /* Setting up a simple plugin */ 115 plugin = (struct visibility_plugin *)malloc 116 (sizeof(struct visibility_plugin), M_WTAP_PLUGIN, 117 M_NOWAIT | M_ZERO); 118 plugin->base.wp_hal = hal; 119 plugin->base.init = visibility_init; 120 plugin->base.deinit = visibility_deinit; 121 plugin->base.work = visibility_work; 122 register_plugin(hal, (struct wtap_plugin *)plugin); 123 124 printf("Loaded wtap wireless simulator\n"); 125 break; 126 case MOD_UNLOAD: 127 destroy_dev(sdev); 128 deregister_plugin(hal); 129 deinit_hal(hal); 130 free(hal, M_WTAP); 131 printf("Unloading wtap wireless simulator\n"); 132 break; 133 default: 134 e = EOPNOTSUPP; /* Error, Operation Not Supported */ 135 break; 136 } 137 138 return(e); 139 } 140 141 /* The second argument of DECLARE_MODULE. */ 142 static moduledata_t wtap_conf = { 143 "wtap", /* module name */ 144 event_handler, /* event handler */ 145 NULL /* extra data */ 146 }; 147 148 DECLARE_MODULE(wtap, wtap_conf, SI_SUB_DRIVERS, SI_ORDER_MIDDLE); 149 MODULE_DEPEND(wtap, wlan, 1, 1, 1); /* 802.11 media layer */ 150