2 * Copyright (c) 2014 The DragonFly Project. All rights reserved.
4 * This code is derived from software contributed to The DragonFly Project
5 * by Bill Yuan <bycn82@gmail.com>
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
35 #include <sys/param.h>
36 #include <sys/kernel.h>
37 #include <sys/malloc.h>
39 #include <sys/socketvar.h>
40 #include <sys/sysctl.h>
41 #include <sys/systimer.h>
42 #include <sys/thread2.h>
44 #include <net/ethernet.h>
45 #include <net/netmsg2.h>
46 #include <net/netisr2.h>
47 #include <net/route.h>
49 #include <netinet/in_var.h>
50 #include <netinet/ip_var.h>
52 #include <net/ipfw3/ip_fw.h>
54 #include "ip_fw3_layer2.h"
57 void check_layer2(int *cmd_ctl, int *cmd_val, struct ip_fw_args **args,
58 struct ip_fw **f, ipfw_insn *cmd, uint16_t ip_len);
59 void check_mac(int *cmd_ctl, int *cmd_val, struct ip_fw_args **args,
60 struct ip_fw **f, ipfw_insn *cmd, uint16_t ip_len);
63 check_layer2(int *cmd_ctl, int *cmd_val, struct ip_fw_args **args,
64 struct ip_fw **f, ipfw_insn *cmd, uint16_t ip_len)
66 *cmd_val = ((*args)->eh != NULL);
67 *cmd_ctl = IP_FW_CTL_NO;
71 check_mac(int *cmd_ctl, int *cmd_val, struct ip_fw_args **args,
72 struct ip_fw **f, ipfw_insn *cmd, uint16_t ip_len)
74 *cmd_ctl = IP_FW_CTL_NO;
75 if ((*args)->eh != NULL) {
76 uint32_t *want = (uint32_t *)((ipfw_insn_mac *)cmd)->addr;
77 uint32_t *mask = (uint32_t *)((ipfw_insn_mac *)cmd)->mask;
78 uint32_t *hdr = (uint32_t *)(*args)->eh;
80 (want[0] == (hdr[0] & mask[0]) &&
81 want[1] == (hdr[1] & mask[1]) &&
82 want[2] == (hdr[2] & mask[2]));
84 *cmd_val = IP_FW_NOT_MATCH;
89 ipfw3_layer2_init(void)
91 register_ipfw_module(MODULE_LAYER2_ID, MODULE_LAYER2_NAME);
92 register_ipfw_filter_funcs(MODULE_LAYER2_ID,
93 O_LAYER2_LAYER2, (filter_func)check_layer2);
94 register_ipfw_filter_funcs(MODULE_LAYER2_ID,
95 O_LAYER2_MAC, (filter_func)check_mac);
100 ipfw3_layer2_stop(void)
102 return unregister_ipfw_module(MODULE_LAYER2_ID);
106 ipfw3_layer2_modevent(module_t mod, int type, void *data)
110 return ipfw3_layer2_init();
112 return ipfw3_layer2_stop();
119 static moduledata_t ipfw3_layer2_mod = {
121 ipfw3_layer2_modevent,
124 DECLARE_MODULE(ipfw3_layer2, ipfw3_layer2_mod, SI_SUB_PROTO_END, SI_ORDER_ANY);
125 MODULE_DEPEND(ipfw3_layer2, ipfw3_basic, 1, 1, 1);
126 MODULE_VERSION(ipfw3_layer2, 1);