1 /* 2 * Copyright (c) 1983, 1993 3 * The Regents of the University of California. 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 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #ifndef lint 31 static const char rcsid[] = 32 "$FreeBSD$"; 33 #endif /* not lint */ 34 35 #include <sys/types.h> 36 #include <sys/ioctl.h> 37 #include <sys/socket.h> 38 #include <net/if.h> 39 40 #include <err.h> 41 #include <stdio.h> 42 #include <stdlib.h> 43 #include <string.h> 44 #include <unistd.h> 45 46 #include "ifconfig.h" 47 48 static void 49 list_cloners(void) 50 { 51 struct if_clonereq ifcr; 52 char *cp, *buf; 53 int idx; 54 int s; 55 56 s = socket(AF_INET, SOCK_DGRAM, 0); 57 if (s == -1) 58 err(1, "socket(AF_INET,SOCK_DGRAM)"); 59 60 memset(&ifcr, 0, sizeof(ifcr)); 61 62 if (ioctl(s, SIOCIFGCLONERS, &ifcr) < 0) 63 err(1, "SIOCIFGCLONERS for count"); 64 65 buf = malloc(ifcr.ifcr_total * IFNAMSIZ); 66 if (buf == NULL) 67 err(1, "unable to allocate cloner name buffer"); 68 69 ifcr.ifcr_count = ifcr.ifcr_total; 70 ifcr.ifcr_buffer = buf; 71 72 if (ioctl(s, SIOCIFGCLONERS, &ifcr) < 0) 73 err(1, "SIOCIFGCLONERS for names"); 74 75 /* 76 * In case some disappeared in the mean time, clamp it down. 77 */ 78 if (ifcr.ifcr_count > ifcr.ifcr_total) 79 ifcr.ifcr_count = ifcr.ifcr_total; 80 81 for (cp = buf, idx = 0; idx < ifcr.ifcr_count; idx++, cp += IFNAMSIZ) { 82 if (idx > 0) 83 putchar(' '); 84 printf("%s", cp); 85 } 86 87 putchar('\n'); 88 free(buf); 89 } 90 91 void 92 clone_create(void) 93 { 94 int s; 95 96 s = socket(AF_INET, SOCK_DGRAM, 0); 97 if (s == -1) 98 err(1, "socket(AF_INET,SOCK_DGRAM)"); 99 100 memset(&ifr, 0, sizeof(ifr)); 101 (void) strlcpy(ifr.ifr_name, name, sizeof(ifr.ifr_name)); 102 if (ioctl(s, SIOCIFCREATE, &ifr) < 0) 103 err(1, "SIOCIFCREATE"); 104 105 /* 106 * If we get a different name back then we put in, we probably 107 * want to print it out, but we might change our mind later so 108 * we just signal our intrest and leave the printout for later. 109 */ 110 if (strcmp(name, ifr.ifr_name) != 0) { 111 printname = 1; 112 strlcpy(name, ifr.ifr_name, sizeof(name)); 113 } 114 115 close(s); 116 } 117 118 static void 119 clone_destroy(const char *val, int d, int s, const struct afswtch *rafp) 120 { 121 122 (void) strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name)); 123 if (ioctl(s, SIOCIFDESTROY, &ifr) < 0) 124 err(1, "SIOCIFDESTROY"); 125 /* 126 * If we create and destroy an interface in the same command, 127 * there isn't any reason to print it's name. 128 */ 129 printname = 0; 130 } 131 132 static struct cmd clone_cmds[] = { 133 DEF_CMD("destroy", 0, clone_destroy), 134 DEF_CMD("unplumb", 0, clone_destroy), 135 }; 136 137 static void 138 clone_Copt_cb(const char *optarg __unused) 139 { 140 list_cloners(); 141 exit(0); 142 } 143 static struct option clone_Copt = { "C", "[-C]", clone_Copt_cb }; 144 145 static __constructor void 146 clone_ctor(void) 147 { 148 #define N(a) (sizeof(a) / sizeof(a[0])) 149 int i; 150 151 for (i = 0; i < N(clone_cmds); i++) 152 cmd_register(&clone_cmds[i]); 153 opt_register(&clone_Copt); 154 #undef N 155 } 156