1 /* 2 * Copyright (c) 2016-2017, Marie Helene Kvello-Aune 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without modification, 6 * are permitted provided that the following conditions are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright notice, 9 * thislist of conditions and the following disclaimer. 10 * 11 * 2. Redistributions in binary form must reproduce the above copyright notice, 12 * this list of conditions and the following disclaimer in the documentation and/or 13 * other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 16 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 17 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 21 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 22 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 23 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 * 26 * $FreeBSD$ 27 */ 28 29 #include <err.h> 30 #include <errno.h> 31 #include <net/if.h> 32 #include <sys/ioctl.h> 33 #include <stdio.h> 34 #include <stdlib.h> 35 #include <string.h> 36 #include <libifconfig.h> 37 38 39 int 40 main(int argc, char *argv[]) 41 { 42 char *ifname, *ifactualname; 43 ifconfig_handle_t *lifh; 44 45 if (argc != 2) { 46 errx(EINVAL, "Invalid number of arguments." 47 " Only one argument is accepted, and it should be the name" 48 " of the interface to be created."); 49 } 50 51 /* We have a static number of arguments. Therefore we can do it simple. */ 52 ifname = strdup(argv[1]); 53 54 printf("Requested interface name: %s\n", ifname); 55 56 lifh = ifconfig_open(); 57 if (lifh == NULL) { 58 errx(ENOMEM, "Failed to open libifconfig handle."); 59 return (-1); 60 } 61 62 if (ifconfig_create_interface(lifh, ifname, &ifactualname) == 0) { 63 printf("Successfully created interface '%s'\n", ifactualname); 64 ifconfig_close(lifh); 65 lifh = NULL; 66 free(ifname); 67 free(ifactualname); 68 return (0); 69 } 70 71 switch (ifconfig_err_errtype(lifh)) { 72 case SOCKET: 73 warnx("couldn't create socket. This shouldn't happen.\n"); 74 break; 75 case IOCTL: 76 if (ifconfig_err_ioctlreq(lifh) == SIOCIFCREATE2) { 77 warnx( 78 "Failed to create interface (SIOCIFCREATE2)\n"); 79 } 80 break; 81 default: 82 warnx( 83 "This is a thorough example accommodating for temporary" 84 " 'not implemented yet' errors. That's likely what happened" 85 " now. If not, your guess is as good as mine. ;)" 86 " Error code: %d\n", ifconfig_err_errno( 87 lifh)); 88 break; 89 } 90 91 ifconfig_close(lifh); 92 lifh = NULL; 93 free(ifname); 94 free(ifactualname); 95 return (-1); 96 } 97