1 /* $NetBSD: npfext_log.c,v 1.4 2013/03/11 00:29:09 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 2012 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Mindaugas Rasiukevicius. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 __RCSID("$NetBSD: npfext_log.c,v 1.4 2013/03/11 00:29:09 christos Exp $"); 34 35 #include <sys/types.h> 36 #include <sys/socket.h> 37 #include <sys/ioctl.h> 38 #include <net/if.h> 39 40 #include <stdio.h> 41 #include <string.h> 42 #include <assert.h> 43 #include <errno.h> 44 #include <err.h> 45 #include <unistd.h> 46 47 #include <npf.h> 48 49 int npfext_log_init(void); 50 nl_ext_t * npfext_log_construct(const char *); 51 int npfext_log_param(nl_ext_t *, const char *, const char *); 52 53 int 54 npfext_log_init(void) 55 { 56 /* Nothing to initialise. */ 57 return 0; 58 } 59 60 nl_ext_t * 61 npfext_log_construct(const char *name) 62 { 63 assert(strcmp(name, "log") == 0); 64 return npf_ext_construct(name); 65 } 66 67 int 68 npfext_log_param(nl_ext_t *ext, const char *param, const char *val __unused) 69 { 70 unsigned int if_idx; 71 72 assert(param != NULL); 73 74 if_idx = if_nametoindex(param); 75 if (if_idx == 0) { 76 int s; 77 struct ifreq ifr; 78 struct ifconf ifc; 79 80 if ((s = socket(PF_INET, SOCK_DGRAM, 0)) == -1) { 81 warn("Can't create datagram socket for `%s'", param); 82 return errno; 83 } 84 85 memset(&ifr, 0, sizeof(ifr)); 86 strlcpy(ifr.ifr_name, param, sizeof(ifr.ifr_name)); 87 if (ioctl(s, SIOCIFCREATE, &ifr) == -1) { 88 warn("Can't SIOCIFCREATE `%s'", param); 89 close(s); 90 return errno; 91 } 92 93 memset(&ifc, 0, sizeof(ifc)); 94 strlcpy(ifr.ifr_name, param, sizeof(ifr.ifr_name)); 95 if (ioctl(s, SIOCGIFFLAGS, &ifr) == -1) { 96 warn("Can't SIOCGIFFLAGS `%s'", param); 97 close(s); 98 return errno; 99 } 100 101 ifr.ifr_flags |= IFF_UP; 102 if (ioctl(s, SIOCSIFFLAGS, &ifr) == -1) { 103 warn("Can't SIOCSIFFLAGS `%s'", param); 104 close(s); 105 return errno; 106 } 107 close(s); 108 109 if_idx = if_nametoindex(param); 110 if (if_idx == 0) 111 return EINVAL; 112 } 113 npf_ext_param_u32(ext, "log-interface", if_idx); 114 return 0; 115 } 116