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 <sys/ioctl.h> 30 31 #include <net/if.h> 32 33 #include <errno.h> 34 #include <ifaddrs.h> 35 #include <stdio.h> 36 #include <stdlib.h> 37 #include <unistd.h> 38 39 #include "libifconfig.h" // Needed for ifconfig_errstate 40 #include "libifconfig_internal.h" 41 42 int 43 ifconfig_getifaddrs(ifconfig_handle_t *h) 44 { 45 int ret; 46 47 if (h->ifap == NULL) { 48 ret = getifaddrs(&h->ifap); 49 return (ret); 50 } else { 51 return (0); 52 } 53 } 54 55 int 56 ifconfig_ioctlwrap(ifconfig_handle_t *h, const int addressfamily, 57 unsigned long request, void *data) 58 { 59 int s; 60 61 if (ifconfig_socket(h, addressfamily, &s) != 0) { 62 return (-1); 63 } 64 65 if (ioctl(s, request, data) != 0) { 66 h->error.errtype = IOCTL; 67 h->error.ioctl_request = request; 68 h->error.errcode = errno; 69 return (-1); 70 } 71 72 return (0); 73 } 74 75 /* 76 * Function to get socket for the specified address family. 77 * If the socket doesn't already exist, attempt to create it. 78 */ 79 int 80 ifconfig_socket(ifconfig_handle_t *h, const int addressfamily, int *s) 81 { 82 83 if (addressfamily > AF_MAX) { 84 h->error.errtype = SOCKET; 85 h->error.errcode = EINVAL; 86 return (-1); 87 } 88 89 if (h->sockets[addressfamily] != -1) { 90 *s = h->sockets[addressfamily]; 91 return (0); 92 } 93 94 /* We don't have a socket of that type available. Create one. */ 95 h->sockets[addressfamily] = socket(addressfamily, SOCK_DGRAM, 0); 96 if (h->sockets[addressfamily] == -1) { 97 h->error.errtype = SOCKET; 98 h->error.errcode = errno; 99 return (-1); 100 } 101 102 *s = h->sockets[addressfamily]; 103 return (0); 104 } 105