npf_ext_log.c revision 1.1.2.4
1 1.1.2.4 yamt /* $NetBSD: npf_ext_log.c,v 1.1.2.4 2014/05/22 11:41:09 yamt Exp $ */ 2 1.1.2.2 yamt 3 1.1.2.2 yamt /*- 4 1.1.2.2 yamt * Copyright (c) 2010-2012 The NetBSD Foundation, Inc. 5 1.1.2.2 yamt * All rights reserved. 6 1.1.2.2 yamt * 7 1.1.2.2 yamt * This material is based upon work partially supported by The 8 1.1.2.2 yamt * NetBSD Foundation under a contract with Mindaugas Rasiukevicius. 9 1.1.2.2 yamt * 10 1.1.2.2 yamt * Redistribution and use in source and binary forms, with or without 11 1.1.2.2 yamt * modification, are permitted provided that the following conditions 12 1.1.2.2 yamt * are met: 13 1.1.2.2 yamt * 1. Redistributions of source code must retain the above copyright 14 1.1.2.2 yamt * notice, this list of conditions and the following disclaimer. 15 1.1.2.2 yamt * 2. Redistributions in binary form must reproduce the above copyright 16 1.1.2.2 yamt * notice, this list of conditions and the following disclaimer in the 17 1.1.2.2 yamt * documentation and/or other materials provided with the distribution. 18 1.1.2.2 yamt * 19 1.1.2.2 yamt * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 1.1.2.2 yamt * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 1.1.2.2 yamt * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 1.1.2.2 yamt * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 1.1.2.2 yamt * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 1.1.2.2 yamt * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 1.1.2.2 yamt * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 1.1.2.2 yamt * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 1.1.2.2 yamt * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 1.1.2.2 yamt * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 1.1.2.2 yamt * POSSIBILITY OF SUCH DAMAGE. 30 1.1.2.2 yamt */ 31 1.1.2.2 yamt 32 1.1.2.2 yamt /* 33 1.1.2.2 yamt * NPF logging extension. 34 1.1.2.2 yamt */ 35 1.1.2.2 yamt 36 1.1.2.2 yamt #include <sys/cdefs.h> 37 1.1.2.4 yamt __KERNEL_RCSID(0, "$NetBSD: npf_ext_log.c,v 1.1.2.4 2014/05/22 11:41:09 yamt Exp $"); 38 1.1.2.2 yamt 39 1.1.2.2 yamt #include <sys/types.h> 40 1.1.2.2 yamt #include <sys/module.h> 41 1.1.2.2 yamt 42 1.1.2.2 yamt #include <sys/conf.h> 43 1.1.2.2 yamt #include <sys/kmem.h> 44 1.1.2.2 yamt #include <sys/mbuf.h> 45 1.1.2.2 yamt #include <sys/mutex.h> 46 1.1.2.2 yamt #include <sys/queue.h> 47 1.1.2.2 yamt 48 1.1.2.2 yamt #include <net/if.h> 49 1.1.2.2 yamt #include <net/if_types.h> 50 1.1.2.2 yamt #include <net/bpf.h> 51 1.1.2.2 yamt 52 1.1.2.2 yamt #include "npf_impl.h" 53 1.1.2.2 yamt 54 1.1.2.2 yamt NPF_EXT_MODULE(npf_ext_log, ""); 55 1.1.2.2 yamt 56 1.1.2.2 yamt #define NPFEXT_LOG_VER 1 57 1.1.2.2 yamt 58 1.1.2.2 yamt static void * npf_ext_log_id; 59 1.1.2.2 yamt 60 1.1.2.2 yamt typedef struct { 61 1.1.2.2 yamt unsigned int if_idx; 62 1.1.2.2 yamt } npf_ext_log_t; 63 1.1.2.2 yamt 64 1.1.2.2 yamt static int 65 1.1.2.2 yamt npf_log_ctor(npf_rproc_t *rp, prop_dictionary_t params) 66 1.1.2.2 yamt { 67 1.1.2.2 yamt npf_ext_log_t *meta; 68 1.1.2.2 yamt 69 1.1.2.2 yamt meta = kmem_zalloc(sizeof(npf_ext_log_t), KM_SLEEP); 70 1.1.2.2 yamt prop_dictionary_get_uint32(params, "log-interface", &meta->if_idx); 71 1.1.2.2 yamt npf_rproc_assign(rp, meta); 72 1.1.2.2 yamt return 0; 73 1.1.2.2 yamt } 74 1.1.2.2 yamt 75 1.1.2.2 yamt static void 76 1.1.2.2 yamt npf_log_dtor(npf_rproc_t *rp, void *meta) 77 1.1.2.2 yamt { 78 1.1.2.2 yamt kmem_free(meta, sizeof(npf_ext_log_t)); 79 1.1.2.2 yamt } 80 1.1.2.2 yamt 81 1.1.2.2 yamt static void 82 1.1.2.2 yamt npf_log(npf_cache_t *npc, nbuf_t *nbuf, void *meta, int *decision) 83 1.1.2.2 yamt { 84 1.1.2.3 yamt struct mbuf *m = nbuf_head_mbuf(nbuf); 85 1.1.2.2 yamt const npf_ext_log_t *log = meta; 86 1.1.2.2 yamt ifnet_t *ifp; 87 1.1.2.2 yamt int family; 88 1.1.2.2 yamt 89 1.1.2.2 yamt /* Set the address family. */ 90 1.1.2.2 yamt if (npf_iscached(npc, NPC_IP4)) { 91 1.1.2.2 yamt family = AF_INET; 92 1.1.2.2 yamt } else if (npf_iscached(npc, NPC_IP6)) { 93 1.1.2.2 yamt family = AF_INET6; 94 1.1.2.2 yamt } else { 95 1.1.2.2 yamt family = AF_UNSPEC; 96 1.1.2.2 yamt } 97 1.1.2.2 yamt 98 1.1.2.2 yamt KERNEL_LOCK(1, NULL); 99 1.1.2.2 yamt 100 1.1.2.2 yamt /* Find a pseudo-interface to log. */ 101 1.1.2.2 yamt ifp = if_byindex(log->if_idx); 102 1.1.2.2 yamt if (ifp == NULL) { 103 1.1.2.2 yamt /* No interface. */ 104 1.1.2.2 yamt KERNEL_UNLOCK_ONE(NULL); 105 1.1.2.2 yamt return; 106 1.1.2.2 yamt } 107 1.1.2.2 yamt 108 1.1.2.2 yamt /* Pass through BPF. */ 109 1.1.2.2 yamt ifp->if_opackets++; 110 1.1.2.2 yamt ifp->if_obytes += m->m_pkthdr.len; 111 1.1.2.2 yamt bpf_mtap_af(ifp, family, m); 112 1.1.2.2 yamt KERNEL_UNLOCK_ONE(NULL); 113 1.1.2.2 yamt } 114 1.1.2.2 yamt 115 1.1.2.2 yamt /* 116 1.1.2.2 yamt * Module interface. 117 1.1.2.2 yamt */ 118 1.1.2.2 yamt static int 119 1.1.2.2 yamt npf_ext_log_modcmd(modcmd_t cmd, void *arg) 120 1.1.2.2 yamt { 121 1.1.2.2 yamt static const npf_ext_ops_t npf_log_ops = { 122 1.1.2.2 yamt .version = NPFEXT_LOG_VER, 123 1.1.2.2 yamt .ctx = NULL, 124 1.1.2.2 yamt .ctor = npf_log_ctor, 125 1.1.2.2 yamt .dtor = npf_log_dtor, 126 1.1.2.2 yamt .proc = npf_log 127 1.1.2.2 yamt }; 128 1.1.2.2 yamt int error; 129 1.1.2.2 yamt 130 1.1.2.2 yamt switch (cmd) { 131 1.1.2.2 yamt case MODULE_CMD_INIT: 132 1.1.2.2 yamt /* 133 1.1.2.2 yamt * Initialise the NPF logging extension. 134 1.1.2.2 yamt */ 135 1.1.2.2 yamt npf_ext_log_id = npf_ext_register("log", &npf_log_ops); 136 1.1.2.2 yamt if (!npf_ext_log_id) { 137 1.1.2.2 yamt return EEXIST; 138 1.1.2.2 yamt } 139 1.1.2.2 yamt break; 140 1.1.2.2 yamt 141 1.1.2.2 yamt case MODULE_CMD_FINI: 142 1.1.2.2 yamt error = npf_ext_unregister(npf_ext_log_id); 143 1.1.2.2 yamt if (error) { 144 1.1.2.2 yamt return error; 145 1.1.2.2 yamt } 146 1.1.2.2 yamt break; 147 1.1.2.2 yamt 148 1.1.2.2 yamt case MODULE_CMD_AUTOUNLOAD: 149 1.1.2.2 yamt /* Allow auto-unload only if NPF permits it. */ 150 1.1.2.2 yamt return npf_autounload_p() ? 0 : EBUSY; 151 1.1.2.2 yamt 152 1.1.2.2 yamt default: 153 1.1.2.2 yamt return ENOTTY; 154 1.1.2.2 yamt } 155 1.1.2.2 yamt return 0; 156 1.1.2.2 yamt } 157
Indexes created Wed Oct 22 13:09:56 GMT 2025