1 /*- 2 * Copyright (c) 2017 Yandex LLC 3 * Copyright (c) 2017 Andrey V. Elsukov <ae@FreeBSD.org> 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 #include <sys/cdefs.h> 29 #include <sys/param.h> 30 #include <sys/systm.h> 31 #include <sys/kernel.h> 32 #include <sys/lock.h> 33 #include <sys/malloc.h> 34 #include <sys/module.h> 35 #include <sys/rwlock.h> 36 #include <sys/socket.h> 37 38 #include <net/if.h> 39 #include <net/vnet.h> 40 41 #include <netinet/in.h> 42 #include <netinet/ip_var.h> 43 #include <netinet/ip_fw.h> 44 45 #include <netpfil/ipfw/ip_fw_private.h> 46 #include <netpfil/ipfw/pmod/pmod.h> 47 48 static int 49 vnet_ipfw_pmod_init(const void *arg __unused) 50 { 51 int error; 52 53 error = tcpmod_init(&V_layer3_chain, IS_DEFAULT_VNET(curvnet)); 54 return (error); 55 } 56 57 static int 58 vnet_ipfw_pmod_uninit(const void *arg __unused) 59 { 60 61 tcpmod_uninit(&V_layer3_chain, IS_DEFAULT_VNET(curvnet)); 62 return (0); 63 } 64 65 static int 66 ipfw_pmod_modevent(module_t mod, int type, void *unused) 67 { 68 69 switch (type) { 70 case MOD_LOAD: 71 case MOD_UNLOAD: 72 break; 73 default: 74 return (EOPNOTSUPP); 75 } 76 return (0); 77 } 78 79 static moduledata_t ipfw_pmod_mod = { 80 "ipfw_pmod", 81 ipfw_pmod_modevent, 82 0 83 }; 84 85 /* Define startup order. */ 86 #define IPFW_PMOD_SI_SUB_FIREWALL SI_SUB_PROTO_IFATTACHDOMAIN 87 #define IPFW_PMOD_MODEVENT_ORDER (SI_ORDER_ANY - 128) /* after ipfw */ 88 #define IPFW_PMOD_MODULE_ORDER (IPFW_PMOD_MODEVENT_ORDER + 1) 89 #define IPFW_PMOD_VNET_ORDER (IPFW_PMOD_MODEVENT_ORDER + 2) 90 91 DECLARE_MODULE(ipfw_pmod, ipfw_pmod_mod, IPFW_PMOD_SI_SUB_FIREWALL, 92 IPFW_PMOD_MODULE_ORDER); 93 MODULE_DEPEND(ipfw_pmod, ipfw, 3, 3, 3); 94 MODULE_VERSION(ipfw_pmod, 1); 95 96 VNET_SYSINIT(vnet_ipfw_pmod_init, IPFW_PMOD_SI_SUB_FIREWALL, 97 IPFW_PMOD_VNET_ORDER, vnet_ipfw_pmod_init, NULL); 98 VNET_SYSUNINIT(vnet_ipfw_pmod_uninit, IPFW_PMOD_SI_SUB_FIREWALL, 99 IPFW_PMOD_VNET_ORDER, vnet_ipfw_pmod_uninit, NULL); 100