1 /* 2 * Copyright (c) 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 27 #include <err.h> 28 #include <errno.h> 29 #include <net/if.h> 30 #include <sys/ioctl.h> 31 #include <limits.h> 32 #include <stdio.h> 33 #include <stdlib.h> 34 #include <string.h> 35 #include <libifconfig.h> 36 37 38 int 39 main(int argc, char *argv[]) 40 { 41 char *parentif, *ifactualname; 42 unsigned short vlantag; 43 const char *errstr; 44 ifconfig_handle_t *lifh; 45 46 if (argc != 3) { 47 errx(EINVAL, "Invalid number of arguments." 48 " Should provide exactly two arguments: " 49 "PARENT_INTERFACE and VLAN_TAG."); 50 } 51 52 /* We have a static number of arguments. Therefore we can do it simple. */ 53 parentif = strdup(argv[1]); 54 vlantag = strtonum(argv[2], 0, USHRT_MAX, &errstr); 55 56 if (errstr != NULL) { 57 errx(1, "VLAN_TAG must be between 0 and %i.\n", USHRT_MAX); 58 } 59 60 printf("Parent interface: %s\nVLAN tag: %i\n", parentif, vlantag); 61 62 lifh = ifconfig_open(); 63 if (lifh == NULL) { 64 errx(ENOMEM, "Failed to open libifconfig handle."); 65 return (-1); 66 } 67 68 if (ifconfig_create_interface_vlan(lifh, "vlan", &ifactualname, 69 parentif, vlantag) == 0) { 70 printf("Successfully created interface '%s'\n", ifactualname); 71 ifconfig_close(lifh); 72 lifh = NULL; 73 free(parentif); 74 free(ifactualname); 75 return (0); 76 } 77 78 switch (ifconfig_err_errtype(lifh)) { 79 case SOCKET: 80 warnx("couldn't create socket. This shouldn't happen.\n"); 81 break; 82 case IOCTL: 83 if (ifconfig_err_ioctlreq(lifh) == SIOCIFCREATE2) { 84 warnx( 85 "Failed to create interface (SIOCIFCREATE2)\n"); 86 } 87 break; 88 default: 89 warnx( 90 "This is a thorough example accommodating for temporary" 91 " 'not implemented yet' errors. That's likely what happened" 92 " now. If not, your guess is as good as mine. ;)" 93 " Error code: %d\n", ifconfig_err_errno( 94 lifh)); 95 break; 96 } 97 98 ifconfig_close(lifh); 99 lifh = NULL; 100 free(parentif); 101 free(ifactualname); 102 return (-1); 103 } 104