2 * Copyright (c) 2014 - 2018 The DragonFly Project. All rights reserved.
4 * This code is derived from software contributed to The DragonFly Project
5 * by Bill Yuan <bycn82@dragonflybsd.org>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in
15 * the documentation and/or other materials provided with the
17 * 3. Neither the name of The DragonFly Project nor the names of its
18 * contributors may be used to endorse or promote products derived
19 * from this software without specific, prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
25 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
31 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38 #error IPFIREWALL3 requires INET.
41 #include <sys/param.h>
42 #include <sys/kernel.h>
43 #include <sys/malloc.h>
45 #include <sys/socketvar.h>
46 #include <sys/sysctl.h>
47 #include <sys/systimer.h>
48 #include <sys/thread2.h>
50 #include <net/ethernet.h>
51 #include <net/netmsg2.h>
52 #include <net/netisr2.h>
53 #include <net/route.h>
56 #include <netinet/in_var.h>
57 #include <netinet/ip_var.h>
59 #include <net/ipfw3/ip_fw.h>
60 #include <net/ipfw3_basic/ip_fw3_table.h>
62 #include "ip_fw3_layer2.h"
64 extern struct ipfw3_context *fw3_ctx[MAXCPU];
67 check_layer2(int *cmd_ctl, int *cmd_val, struct ip_fw_args **args,
68 struct ip_fw **f, ipfw_insn *cmd, uint16_t ip_len)
70 *cmd_val = ((*args)->eh != NULL);
71 *cmd_ctl = IP_FW_CTL_NO;
75 check_mac(int *cmd_ctl, int *cmd_val, struct ip_fw_args **args,
76 struct ip_fw **f, ipfw_insn *cmd, uint16_t ip_len)
78 *cmd_ctl = IP_FW_CTL_NO;
79 if ((*args)->eh != NULL) {
80 uint32_t *want = (uint32_t *)((ipfw_insn_mac *)cmd)->addr;
81 uint32_t *mask = (uint32_t *)((ipfw_insn_mac *)cmd)->mask;
82 uint32_t *hdr = (uint32_t *)(*args)->eh;
84 (want[0] == (hdr[0] & mask[0]) &&
85 want[1] == (hdr[1] & mask[1]) &&
86 want[2] == (hdr[2] & mask[2]));
88 *cmd_val = IP_FW_NOT_MATCH;
93 check_mac_from(int *cmd_ctl, int *cmd_val, struct ip_fw_args **args,
94 struct ip_fw **f, ipfw_insn *cmd, uint16_t ip_len)
96 *cmd_ctl = IP_FW_CTL_NO;
97 if ((*args)->eh != NULL) {
98 uint16_t *want = (uint16_t *)((ipfw_insn_mac *)cmd)->addr;
99 uint16_t *mask = (uint16_t *)((ipfw_insn_mac *)cmd)->mask;
100 uint16_t *hdr = (uint16_t *)(*args)->eh;
102 (want[3] == (hdr[3] & mask[3]) &&
103 want[4] == (hdr[4] & mask[4]) &&
104 want[5] == (hdr[5] & mask[5]));
106 *cmd_val = IP_FW_NOT_MATCH;
111 check_mac_from_lookup(int *cmd_ctl, int *cmd_val, struct ip_fw_args **args,
112 struct ip_fw **f, ipfw_insn *cmd, uint16_t ip_len)
114 struct ipfw3_context *ctx = fw3_ctx[mycpuid];
115 struct ipfw3_table_context *table_ctx;
116 struct radix_node_head *rnh;
117 struct table_mac_entry *ent = NULL;
119 table_ctx = ctx->table_ctx;
120 table_ctx += cmd->arg1;
121 rnh = table_ctx->node;
123 *cmd_ctl = IP_FW_CTL_NO;
124 *cmd_val = IP_FW_NOT_MATCH;
125 if ((*args)->eh != NULL) {
128 strncpy(sa.sa_data, (*args)->eh->ether_shost, 6);
129 ent = (struct table_mac_entry *)rnh->rnh_lookup((char *)&sa,
132 *cmd_val = IP_FW_MATCH;
137 check_mac_to(int *cmd_ctl, int *cmd_val, struct ip_fw_args **args,
138 struct ip_fw **f, ipfw_insn *cmd, uint16_t ip_len)
140 *cmd_ctl = IP_FW_CTL_NO;
141 if ((*args)->eh != NULL) {
142 uint16_t *want = (uint16_t *)((ipfw_insn_mac *)cmd)->addr;
143 uint16_t *mask = (uint16_t *)((ipfw_insn_mac *)cmd)->mask;
144 uint16_t *hdr = (uint16_t *)(*args)->eh;
146 (want[0] == (hdr[0] & mask[0]) &&
147 want[1] == (hdr[1] & mask[1]) &&
148 want[2] == (hdr[2] & mask[2]));
150 *cmd_val = IP_FW_NOT_MATCH;
155 check_mac_to_lookup(int *cmd_ctl, int *cmd_val, struct ip_fw_args **args,
156 struct ip_fw **f, ipfw_insn *cmd, uint16_t ip_len)
158 struct ipfw3_context *ctx = fw3_ctx[mycpuid];
159 struct ipfw3_table_context *table_ctx;
160 struct radix_node_head *rnh;
161 struct table_mac_entry *ent = NULL;
163 table_ctx = ctx->table_ctx;
164 table_ctx += cmd->arg1;
165 rnh = table_ctx->node;
167 *cmd_ctl = IP_FW_CTL_NO;
168 *cmd_val = IP_FW_NOT_MATCH;
169 if ((*args)->eh != NULL) {
172 strncpy(sa.sa_data, (*args)->eh->ether_dhost, 6);
173 ent = (struct table_mac_entry *)rnh->rnh_lookup((char *)&sa,
176 *cmd_val = IP_FW_MATCH;
181 ip_fw3_layer2_init(void)
183 ip_fw3_register_module(MODULE_LAYER2_ID, MODULE_LAYER2_NAME);
184 ip_fw3_register_filter_funcs(MODULE_LAYER2_ID,
185 O_LAYER2_LAYER2, (filter_func)check_layer2);
186 ip_fw3_register_filter_funcs(MODULE_LAYER2_ID,
187 O_LAYER2_MAC, (filter_func)check_mac);
188 ip_fw3_register_filter_funcs(MODULE_LAYER2_ID,
189 O_LAYER2_MAC_SRC, (filter_func)check_mac_from);
190 ip_fw3_register_filter_funcs(MODULE_LAYER2_ID,
191 O_LAYER2_MAC_DST, (filter_func)check_mac_to);
192 ip_fw3_register_filter_funcs(MODULE_LAYER2_ID,
193 O_LAYER2_MAC_SRC_LOOKUP,
194 (filter_func)check_mac_from_lookup);
195 ip_fw3_register_filter_funcs(MODULE_LAYER2_ID,
196 O_LAYER2_MAC_DST_LOOKUP,
197 (filter_func)check_mac_to_lookup);
202 ip_fw3_layer2_stop(void)
204 return ip_fw3_unregister_module(MODULE_LAYER2_ID);
208 ipfw3_layer2_modevent(module_t mod, int type, void *data)
212 return ip_fw3_layer2_init();
214 return ip_fw3_layer2_stop();
221 static moduledata_t ipfw3_layer2_mod = {
223 ipfw3_layer2_modevent,
226 DECLARE_MODULE(ipfw3_layer2, ipfw3_layer2_mod, SI_SUB_PROTO_END, SI_ORDER_ANY);
227 MODULE_DEPEND(ipfw3_layer2, ipfw3_basic, 1, 1, 1);
228 MODULE_VERSION(ipfw3_layer2, 1);