1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * This is a module which is used for setting the skb->priority field 4 * of an skb for qdisc classification. 5 */ 6 7 /* (C) 2001-2002 Patrick McHardy <kaber@trash.net> 8 */ 9 10 #include <linux/module.h> 11 #include <linux/skbuff.h> 12 #include <linux/ip.h> 13 #include <net/checksum.h> 14 15 #include <linux/netfilter_ipv4.h> 16 #include <linux/netfilter_ipv6.h> 17 #include <linux/netfilter/x_tables.h> 18 #include <linux/netfilter/xt_CLASSIFY.h> 19 #include <linux/netfilter_arp.h> 20 21 MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>"); 22 MODULE_LICENSE("GPL"); 23 MODULE_DESCRIPTION("Xtables: Qdisc classification"); 24 MODULE_ALIAS("ipt_CLASSIFY"); 25 MODULE_ALIAS("ip6t_CLASSIFY"); 26 MODULE_ALIAS("arpt_CLASSIFY"); 27 28 static unsigned int 29 classify_tg(struct sk_buff *skb, const struct xt_action_param *par) 30 { 31 const struct xt_classify_target_info *clinfo = par->targinfo; 32 33 skb->priority = clinfo->priority; 34 return XT_CONTINUE; 35 } 36 37 static struct xt_target classify_tg_reg[] __read_mostly = { 38 { 39 .name = "CLASSIFY", 40 .revision = 0, 41 .family = NFPROTO_IPV4, 42 .hooks = (1 << NF_INET_LOCAL_OUT) | (1 << NF_INET_FORWARD) | 43 (1 << NF_INET_POST_ROUTING), 44 .target = classify_tg, 45 .targetsize = sizeof(struct xt_classify_target_info), 46 .me = THIS_MODULE, 47 }, 48 { 49 .name = "CLASSIFY", 50 .revision = 0, 51 .family = NFPROTO_ARP, 52 .hooks = (1 << NF_ARP_OUT) | (1 << NF_ARP_FORWARD), 53 .target = classify_tg, 54 .targetsize = sizeof(struct xt_classify_target_info), 55 .me = THIS_MODULE, 56 }, 57 #if IS_ENABLED(CONFIG_IP6_NF_IPTABLES) 58 { 59 .name = "CLASSIFY", 60 .revision = 0, 61 .family = NFPROTO_IPV6, 62 .hooks = (1 << NF_INET_LOCAL_OUT) | (1 << NF_INET_FORWARD) | 63 (1 << NF_INET_POST_ROUTING), 64 .target = classify_tg, 65 .targetsize = sizeof(struct xt_classify_target_info), 66 .me = THIS_MODULE, 67 }, 68 #endif 69 }; 70 71 static int __init classify_tg_init(void) 72 { 73 return xt_register_targets(classify_tg_reg, ARRAY_SIZE(classify_tg_reg)); 74 } 75 76 static void __exit classify_tg_exit(void) 77 { 78 xt_unregister_targets(classify_tg_reg, ARRAY_SIZE(classify_tg_reg)); 79 } 80 81 module_init(classify_tg_init); 82 module_exit(classify_tg_exit); 83