1 /* 2 * Copyright (c) 2016, 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 * 3. Neither the name of the copyright holder nor the names of its contributors 16 * may be used to endorse or promote products derived from this software without 17 * specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 20 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 21 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 25 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 26 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 27 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 * 30 * $FreeBSD$ 31 */ 32 33 34 #include <net/if.h> 35 36 #include <errno.h> 37 #include <stdio.h> 38 #include <stdlib.h> 39 #include <sys/ioctl.h> 40 #include <unistd.h> 41 42 43 #include "libifconfig.h" // Needed for ifconfig_errstate 44 #include "libifconfig_internal.h" 45 46 int 47 ifconfig_ioctlwrap_ret(ifconfig_handle_t *h, unsigned long request, int rcode) 48 { 49 if (rcode != 0) { 50 h->error.errtype = IOCTL; 51 h->error.ioctl_request = request; 52 h->error.errcode = errno; 53 } 54 return (rcode); 55 } 56 57 58 int 59 ifconfig_ioctlwrap(ifconfig_handle_t *h, const int addressfamily, 60 unsigned long request, struct ifreq *ifr) 61 { 62 int s; 63 64 if (ifconfig_socket(h, addressfamily, &s) != 0) { 65 return (-1); 66 } 67 68 int rcode = ioctl(s, request, ifr); 69 return (ifconfig_ioctlwrap_ret(h, request, rcode)); 70 } 71 72 73 /* 74 * Function to get socket for the specified address family. 75 * If the socket doesn't already exist, attempt to create it. 76 */ 77 int ifconfig_socket(ifconfig_handle_t *h, const int addressfamily, int *s) 78 { 79 if (addressfamily > AF_MAX) { 80 h->error.errtype = SOCKET; 81 h->error.errcode = EINVAL; 82 return (-1); 83 } 84 85 if (h->sockets[addressfamily] != -1) { 86 *s = h->sockets[addressfamily]; 87 return (0); 88 } 89 90 /* We don't have a socket of that type available. Create one. */ 91 h->sockets[addressfamily] = socket(addressfamily, SOCK_DGRAM, 0); 92 if (h->sockets[addressfamily] == -1) { 93 h->error.errtype = SOCKET; 94 h->error.errcode = errno; 95 return (-1); 96 } 97 98 *s = h->sockets[addressfamily]; 99 return (0); 100 } 101