/*
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* (C) 2012-2013 by Pablo Neira Ayuso <pablo@netfilter.org>
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* (C) 2013 by Tomasz Bursztyka <tomasz.bursztyka@linux.intel.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This code has been sponsored by Sophos Astaro <http://www.sophos.com>
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*/
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#include <string.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdbool.h>
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#include <netdb.h>
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#include <errno.h>
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#include <xtables.h>
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#include <linux/netfilter/nf_tables.h>
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#include <libmnl/libmnl.h>
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#include <libnftnl/rule.h>
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#include <libnftnl/expr.h>
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#include "nft-shared.h"
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#include "nft-bridge.h"
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#include "xshared.h"
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#include "nft.h"
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extern struct nft_family_ops nft_family_ops_ipv4;
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extern struct nft_family_ops nft_family_ops_ipv6;
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extern struct nft_family_ops nft_family_ops_arp;
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extern struct nft_family_ops nft_family_ops_bridge;
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void add_meta(struct nftnl_rule *r, uint32_t key)
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{
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struct nftnl_expr *expr;
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expr = nftnl_expr_alloc("meta");
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if (expr == NULL)
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return;
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nftnl_expr_set_u32(expr, NFTNL_EXPR_META_KEY, key);
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nftnl_expr_set_u32(expr, NFTNL_EXPR_META_DREG, NFT_REG_1);
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nftnl_rule_add_expr(r, expr);
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}
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void add_payload(struct nftnl_rule *r, int offset, int len, uint32_t base)
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{
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struct nftnl_expr *expr;
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expr = nftnl_expr_alloc("payload");
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if (expr == NULL)
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return;
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nftnl_expr_set_u32(expr, NFTNL_EXPR_PAYLOAD_BASE, base);
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nftnl_expr_set_u32(expr, NFTNL_EXPR_PAYLOAD_DREG, NFT_REG_1);
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nftnl_expr_set_u32(expr, NFTNL_EXPR_PAYLOAD_OFFSET, offset);
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nftnl_expr_set_u32(expr, NFTNL_EXPR_PAYLOAD_LEN, len);
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nftnl_rule_add_expr(r, expr);
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}
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/* bitwise operation is = sreg & mask ^ xor */
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void add_bitwise_u16(struct nftnl_rule *r, int mask, int xor)
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{
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struct nftnl_expr *expr;
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expr = nftnl_expr_alloc("bitwise");
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if (expr == NULL)
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return;
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nftnl_expr_set_u32(expr, NFTNL_EXPR_BITWISE_SREG, NFT_REG_1);
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nftnl_expr_set_u32(expr, NFTNL_EXPR_BITWISE_DREG, NFT_REG_1);
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nftnl_expr_set_u32(expr, NFTNL_EXPR_BITWISE_LEN, sizeof(uint16_t));
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nftnl_expr_set(expr, NFTNL_EXPR_BITWISE_MASK, &mask, sizeof(uint16_t));
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nftnl_expr_set(expr, NFTNL_EXPR_BITWISE_XOR, &xor, sizeof(uint16_t));
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nftnl_rule_add_expr(r, expr);
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}
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static void add_bitwise(struct nftnl_rule *r, uint8_t *mask, size_t len)
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{
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struct nftnl_expr *expr;
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uint32_t xor[4] = { 0 };
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expr = nftnl_expr_alloc("bitwise");
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if (expr == NULL)
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return;
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nftnl_expr_set_u32(expr, NFTNL_EXPR_BITWISE_SREG, NFT_REG_1);
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nftnl_expr_set_u32(expr, NFTNL_EXPR_BITWISE_DREG, NFT_REG_1);
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nftnl_expr_set_u32(expr, NFTNL_EXPR_BITWISE_LEN, len);
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nftnl_expr_set(expr, NFTNL_EXPR_BITWISE_MASK, mask, len);
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nftnl_expr_set(expr, NFTNL_EXPR_BITWISE_XOR, &xor, len);
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nftnl_rule_add_expr(r, expr);
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}
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void add_cmp_ptr(struct nftnl_rule *r, uint32_t op, void *data, size_t len)
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{
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struct nftnl_expr *expr;
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expr = nftnl_expr_alloc("cmp");
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if (expr == NULL)
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return;
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nftnl_expr_set_u32(expr, NFTNL_EXPR_CMP_SREG, NFT_REG_1);
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nftnl_expr_set_u32(expr, NFTNL_EXPR_CMP_OP, op);
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nftnl_expr_set(expr, NFTNL_EXPR_CMP_DATA, data, len);
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nftnl_rule_add_expr(r, expr);
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}
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void add_cmp_u8(struct nftnl_rule *r, uint8_t val, uint32_t op)
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{
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add_cmp_ptr(r, op, &val, sizeof(val));
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}
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void add_cmp_u16(struct nftnl_rule *r, uint16_t val, uint32_t op)
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{
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add_cmp_ptr(r, op, &val, sizeof(val));
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}
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void add_cmp_u32(struct nftnl_rule *r, uint32_t val, uint32_t op)
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{
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add_cmp_ptr(r, op, &val, sizeof(val));
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}
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void add_iniface(struct nftnl_rule *r, char *iface, uint32_t op)
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{
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int iface_len;
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iface_len = strlen(iface);
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add_meta(r, NFT_META_IIFNAME);
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if (iface[iface_len - 1] == '+')
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add_cmp_ptr(r, op, iface, iface_len - 1);
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else
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add_cmp_ptr(r, op, iface, iface_len + 1);
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}
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void add_outiface(struct nftnl_rule *r, char *iface, uint32_t op)
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{
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int iface_len;
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iface_len = strlen(iface);
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add_meta(r, NFT_META_OIFNAME);
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if (iface[iface_len - 1] == '+')
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add_cmp_ptr(r, op, iface, iface_len - 1);
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else
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add_cmp_ptr(r, op, iface, iface_len + 1);
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}
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void add_addr(struct nftnl_rule *r, int offset,
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void *data, void *mask, size_t len, uint32_t op)
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{
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add_payload(r, offset, len, NFT_PAYLOAD_NETWORK_HEADER);
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add_bitwise(r, mask, len);
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add_cmp_ptr(r, op, data, len);
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}
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void add_proto(struct nftnl_rule *r, int offset, size_t len,
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uint8_t proto, uint32_t op)
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{
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add_payload(r, offset, len, NFT_PAYLOAD_NETWORK_HEADER);
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add_cmp_u8(r, proto, op);
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}
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bool is_same_interfaces(const char *a_iniface, const char *a_outiface,
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unsigned const char *a_iniface_mask,
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unsigned const char *a_outiface_mask,
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const char *b_iniface, const char *b_outiface,
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unsigned const char *b_iniface_mask,
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unsigned const char *b_outiface_mask)
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{
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int i;
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for (i = 0; i < IFNAMSIZ; i++) {
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if (a_iniface_mask[i] != b_iniface_mask[i]) {
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DEBUGP("different iniface mask %x, %x (%d)\n",
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a_iniface_mask[i] & 0xff, b_iniface_mask[i] & 0xff, i);
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return false;
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}
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if ((a_iniface[i] & a_iniface_mask[i])
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!= (b_iniface[i] & b_iniface_mask[i])) {
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DEBUGP("different iniface\n");
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return false;
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}
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if (a_outiface_mask[i] != b_outiface_mask[i]) {
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DEBUGP("different outiface mask\n");
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return false;
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}
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if ((a_outiface[i] & a_outiface_mask[i])
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!= (b_outiface[i] & b_outiface_mask[i])) {
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DEBUGP("different outiface\n");
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return false;
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}
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}
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return true;
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}
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int parse_meta(struct nftnl_expr *e, uint8_t key, char *iniface,
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unsigned char *iniface_mask, char *outiface,
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unsigned char *outiface_mask, uint8_t *invflags)
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{
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uint32_t value;
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const void *ifname;
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uint32_t len;
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switch(key) {
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case NFT_META_IIF:
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value = nftnl_expr_get_u32(e, NFTNL_EXPR_CMP_DATA);
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if (nftnl_expr_get_u32(e, NFTNL_EXPR_CMP_OP) == NFT_CMP_NEQ)
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*invflags |= IPT_INV_VIA_IN;
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if_indextoname(value, iniface);
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memset(iniface_mask, 0xff, strlen(iniface)+1);
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break;
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case NFT_META_OIF:
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value = nftnl_expr_get_u32(e, NFTNL_EXPR_CMP_DATA);
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if (nftnl_expr_get_u32(e, NFTNL_EXPR_CMP_OP) == NFT_CMP_NEQ)
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*invflags |= IPT_INV_VIA_OUT;
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if_indextoname(value, outiface);
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memset(outiface_mask, 0xff, strlen(outiface)+1);
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break;
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case NFT_META_IIFNAME:
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ifname = nftnl_expr_get(e, NFTNL_EXPR_CMP_DATA, &len);
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if (nftnl_expr_get_u32(e, NFTNL_EXPR_CMP_OP) == NFT_CMP_NEQ)
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*invflags |= IPT_INV_VIA_IN;
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memcpy(iniface, ifname, len);
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if (iniface[len] == '\0')
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memset(iniface_mask, 0xff, len);
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else {
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iniface[len] = '+';
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iniface[len+1] = '\0';
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memset(iniface_mask, 0xff, len + 1);
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}
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break;
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case NFT_META_OIFNAME:
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ifname = nftnl_expr_get(e, NFTNL_EXPR_CMP_DATA, &len);
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if (nftnl_expr_get_u32(e, NFTNL_EXPR_CMP_OP) == NFT_CMP_NEQ)
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*invflags |= IPT_INV_VIA_OUT;
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memcpy(outiface, ifname, len);
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if (outiface[len] == '\0')
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memset(outiface_mask, 0xff, len);
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else {
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outiface[len] = '+';
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outiface[len+1] = '\0';
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memset(outiface_mask, 0xff, len + 1);
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}
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break;
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default:
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return -1;
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}
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return 0;
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}
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static void *nft_get_data(struct nft_xt_ctx *ctx)
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{
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switch(ctx->family) {
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case NFPROTO_IPV4:
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case NFPROTO_IPV6:
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return ctx->state.cs;
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case NFPROTO_ARP:
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return ctx->state.cs_arp;
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case NFPROTO_BRIDGE:
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return ctx->state.cs_eb;
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default:
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/* Should not happen */
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return NULL;
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}
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}
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void nft_parse_target(struct nft_xt_ctx *ctx, struct nftnl_expr *e)
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{
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uint32_t tg_len;
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const char *targname = nftnl_expr_get_str(e, NFTNL_EXPR_TG_NAME);
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const void *targinfo = nftnl_expr_get(e, NFTNL_EXPR_TG_INFO, &tg_len);
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struct xtables_target *target;
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struct xt_entry_target *t;
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size_t size;
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struct nft_family_ops *ops;
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void *data = nft_get_data(ctx);
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target = xtables_find_target(targname, XTF_TRY_LOAD);
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if (target == NULL)
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return;
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size = XT_ALIGN(sizeof(struct xt_entry_target)) + tg_len;
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t = calloc(1, size);
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if (t == NULL) {
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fprintf(stderr, "OOM");
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exit(EXIT_FAILURE);
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}
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memcpy(&t->data, targinfo, tg_len);
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t->u.target_size = size;
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t->u.user.revision = nftnl_expr_get_u32(e, NFTNL_EXPR_TG_REV);
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strcpy(t->u.user.name, target->name);
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target->t = t;
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ops = nft_family_ops_lookup(ctx->family);
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ops->parse_target(target, data);
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}
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void nft_parse_match(struct nft_xt_ctx *ctx, struct nftnl_expr *e)
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{
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uint32_t mt_len;
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const char *mt_name = nftnl_expr_get_str(e, NFTNL_EXPR_MT_NAME);
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const void *mt_info = nftnl_expr_get(e, NFTNL_EXPR_MT_INFO, &mt_len);
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struct xtables_match *match;
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struct xtables_rule_match **matches;
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struct xt_entry_match *m;
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struct nft_family_ops *ops;
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switch (ctx->family) {
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case NFPROTO_IPV4:
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case NFPROTO_IPV6:
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matches = &ctx->state.cs->matches;
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break;
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case NFPROTO_BRIDGE:
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matches = &ctx->state.cs_eb->matches;
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break;
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default:
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fprintf(stderr, "BUG: nft_parse_match() unknown family %d\n",
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ctx->family);
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exit(EXIT_FAILURE);
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}
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match = xtables_find_match(mt_name, XTF_TRY_LOAD, matches);
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if (match == NULL)
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return;
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m = calloc(1, sizeof(struct xt_entry_match) + mt_len);
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if (m == NULL) {
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fprintf(stderr, "OOM");
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exit(EXIT_FAILURE);
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}
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memcpy(&m->data, mt_info, mt_len);
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m->u.match_size = mt_len + XT_ALIGN(sizeof(struct xt_entry_match));
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m->u.user.revision = nftnl_expr_get_u32(e, NFTNL_EXPR_TG_REV);
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strcpy(m->u.user.name, match->name);
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match->m = m;
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ops = nft_family_ops_lookup(ctx->family);
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if (ops->parse_match != NULL)
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ops->parse_match(match, nft_get_data(ctx));
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}
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void print_proto(uint16_t proto, int invert)
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{
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const struct protoent *pent = getprotobynumber(proto);
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if (invert)
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printf("! ");
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if (pent) {
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printf("-p %s ", pent->p_name);
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return;
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}
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printf("-p %u ", proto);
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}
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void get_cmp_data(struct nftnl_expr *e, void *data, size_t dlen, bool *inv)
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{
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uint32_t len;
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uint8_t op;
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memcpy(data, nftnl_expr_get(e, NFTNL_EXPR_CMP_DATA, &len), dlen);
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op = nftnl_expr_get_u32(e, NFTNL_EXPR_CMP_OP);
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if (op == NFT_CMP_NEQ)
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*inv = true;
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else
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*inv = false;
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}
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void nft_parse_meta(struct nft_xt_ctx *ctx, struct nftnl_expr *e)
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{
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ctx->reg = nftnl_expr_get_u32(e, NFTNL_EXPR_META_DREG);
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ctx->meta.key = nftnl_expr_get_u32(e, NFTNL_EXPR_META_KEY);
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ctx->flags |= NFT_XT_CTX_META;
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}
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void nft_parse_payload(struct nft_xt_ctx *ctx, struct nftnl_expr *e)
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{
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ctx->reg = nftnl_expr_get_u32(e, NFTNL_EXPR_META_DREG);
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ctx->payload.offset = nftnl_expr_get_u32(e, NFTNL_EXPR_PAYLOAD_OFFSET);
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ctx->flags |= NFT_XT_CTX_PAYLOAD;
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}
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void nft_parse_bitwise(struct nft_xt_ctx *ctx, struct nftnl_expr *e)
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{
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uint32_t reg, len;
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const void *data;
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reg = nftnl_expr_get_u32(e, NFTNL_EXPR_BITWISE_SREG);
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if (ctx->reg && reg != ctx->reg)
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return;
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data = nftnl_expr_get(e, NFTNL_EXPR_BITWISE_XOR, &len);
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memcpy(ctx->bitwise.xor, data, len);
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data = nftnl_expr_get(e, NFTNL_EXPR_BITWISE_MASK, &len);
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memcpy(ctx->bitwise.mask, data, len);
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ctx->flags |= NFT_XT_CTX_BITWISE;
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}
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void nft_parse_cmp(struct nft_xt_ctx *ctx, struct nftnl_expr *e)
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{
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struct nft_family_ops *ops = nft_family_ops_lookup(ctx->family);
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void *data = nft_get_data(ctx);
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uint32_t reg;
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reg = nftnl_expr_get_u32(e, NFTNL_EXPR_CMP_SREG);
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if (ctx->reg && reg != ctx->reg)
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return;
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if (ctx->flags & NFT_XT_CTX_META) {
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ops->parse_meta(ctx, e, data);
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ctx->flags &= ~NFT_XT_CTX_META;
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}
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/* bitwise context is interpreted from payload */
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if (ctx->flags & NFT_XT_CTX_PAYLOAD) {
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ops->parse_payload(ctx, e, data);
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ctx->flags &= ~NFT_XT_CTX_PAYLOAD;
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}
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}
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void nft_parse_counter(struct nftnl_expr *e, struct xt_counters *counters)
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{
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counters->pcnt = nftnl_expr_get_u64(e, NFTNL_EXPR_CTR_PACKETS);
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counters->bcnt = nftnl_expr_get_u64(e, NFTNL_EXPR_CTR_BYTES);
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}
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void nft_parse_immediate(struct nft_xt_ctx *ctx, struct nftnl_expr *e)
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{
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int verdict = nftnl_expr_get_u32(e, NFTNL_EXPR_IMM_VERDICT);
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const char *chain = nftnl_expr_get_str(e, NFTNL_EXPR_IMM_CHAIN);
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struct nft_family_ops *ops;
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const char *jumpto = NULL;
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bool nft_goto = false;
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void *data = nft_get_data(ctx);
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/* Standard target? */
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switch(verdict) {
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case NF_ACCEPT:
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jumpto = "ACCEPT";
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break;
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case NF_DROP:
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jumpto = "DROP";
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break;
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case NFT_RETURN:
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jumpto = "RETURN";
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break;;
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case NFT_GOTO:
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nft_goto = true;
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case NFT_JUMP:
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jumpto = chain;
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break;
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}
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ops = nft_family_ops_lookup(ctx->family);
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ops->parse_immediate(jumpto, nft_goto, data);
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}
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void nft_rule_to_iptables_command_state(struct nftnl_rule *r,
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struct iptables_command_state *cs)
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{
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struct nftnl_expr_iter *iter;
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struct nftnl_expr *expr;
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int family = nftnl_rule_get_u32(r, NFTNL_RULE_FAMILY);
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struct nft_xt_ctx ctx = {
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.state.cs = cs,
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.family = family,
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};
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iter = nftnl_expr_iter_create(r);
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if (iter == NULL)
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return;
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ctx.iter = iter;
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expr = nftnl_expr_iter_next(iter);
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while (expr != NULL) {
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const char *name =
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nftnl_expr_get_str(expr, NFTNL_EXPR_NAME);
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if (strcmp(name, "counter") == 0)
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nft_parse_counter(expr, &ctx.state.cs->counters);
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else if (strcmp(name, "payload") == 0)
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nft_parse_payload(&ctx, expr);
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else if (strcmp(name, "meta") == 0)
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nft_parse_meta(&ctx, expr);
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else if (strcmp(name, "bitwise") == 0)
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nft_parse_bitwise(&ctx, expr);
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else if (strcmp(name, "cmp") == 0)
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nft_parse_cmp(&ctx, expr);
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else if (strcmp(name, "immediate") == 0)
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nft_parse_immediate(&ctx, expr);
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else if (strcmp(name, "match") == 0)
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nft_parse_match(&ctx, expr);
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else if (strcmp(name, "target") == 0)
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nft_parse_target(&ctx, expr);
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expr = nftnl_expr_iter_next(iter);
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}
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nftnl_expr_iter_destroy(iter);
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if (nftnl_rule_is_set(r, NFTNL_RULE_USERDATA)) {
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const void *data;
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uint32_t len;
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struct xtables_match *match;
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struct xt_entry_match *m;
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data = nftnl_rule_get_data(r, NFTNL_RULE_USERDATA, &len);
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match = xtables_find_match("comment", XTF_TRY_LOAD,
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&cs->matches);
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if (match == NULL)
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return;
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m = calloc(1, sizeof(struct xt_entry_match) + len);
|
if (m == NULL) {
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fprintf(stderr, "OOM");
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exit(EXIT_FAILURE);
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}
|
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memcpy(&m->data, get_comment(data, len), len);
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m->u.match_size = len + XT_ALIGN(sizeof(struct xt_entry_match));
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m->u.user.revision = 0;
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strcpy(m->u.user.name, match->name);
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match->m = m;
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}
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if (cs->target != NULL)
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cs->jumpto = cs->target->name;
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else if (cs->jumpto != NULL)
|
cs->target = xtables_find_target(cs->jumpto, XTF_TRY_LOAD);
|
else
|
cs->jumpto = "";
|
}
|
|
void print_header(unsigned int format, const char *chain, const char *pol,
|
const struct xt_counters *counters, bool basechain,
|
uint32_t refs)
|
{
|
printf("Chain %s", chain);
|
if (basechain) {
|
printf(" (policy %s", pol);
|
if (!(format & FMT_NOCOUNTS)) {
|
fputc(' ', stdout);
|
xtables_print_num(counters->pcnt, (format|FMT_NOTABLE));
|
fputs("packets, ", stdout);
|
xtables_print_num(counters->bcnt, (format|FMT_NOTABLE));
|
fputs("bytes", stdout);
|
}
|
printf(")\n");
|
} else {
|
printf(" (%u references)\n", refs);
|
}
|
|
if (format & FMT_LINENUMBERS)
|
printf(FMT("%-4s ", "%s "), "num");
|
if (!(format & FMT_NOCOUNTS)) {
|
if (format & FMT_KILOMEGAGIGA) {
|
printf(FMT("%5s ","%s "), "pkts");
|
printf(FMT("%5s ","%s "), "bytes");
|
} else {
|
printf(FMT("%8s ","%s "), "pkts");
|
printf(FMT("%10s ","%s "), "bytes");
|
}
|
}
|
if (!(format & FMT_NOTARGET))
|
printf(FMT("%-9s ","%s "), "target");
|
fputs(" prot ", stdout);
|
if (format & FMT_OPTIONS)
|
fputs("opt", stdout);
|
if (format & FMT_VIA) {
|
printf(FMT(" %-6s ","%s "), "in");
|
printf(FMT("%-6s ","%s "), "out");
|
}
|
printf(FMT(" %-19s ","%s "), "source");
|
printf(FMT(" %-19s "," %s "), "destination");
|
printf("\n");
|
}
|
|
void print_firewall_details(const struct iptables_command_state *cs,
|
const char *targname, uint8_t flags,
|
uint8_t invflags, uint8_t proto,
|
unsigned int num, unsigned int format)
|
{
|
if (format & FMT_LINENUMBERS)
|
printf(FMT("%-4u ", "%u "), num);
|
|
if (!(format & FMT_NOCOUNTS)) {
|
xtables_print_num(cs->counters.pcnt, format);
|
xtables_print_num(cs->counters.bcnt, format);
|
}
|
|
if (!(format & FMT_NOTARGET))
|
printf(FMT("%-9s ", "%s "), targname ? targname : "");
|
|
fputc(invflags & XT_INV_PROTO ? '!' : ' ', stdout);
|
{
|
const char *pname =
|
proto_to_name(proto, format&FMT_NUMERIC);
|
if (pname)
|
printf(FMT("%-5s", "%s "), pname);
|
else
|
printf(FMT("%-5hu", "%hu "), proto);
|
}
|
}
|
|
void print_ifaces(const char *iniface, const char *outiface, uint8_t invflags,
|
unsigned int format)
|
{
|
char iface[IFNAMSIZ+2];
|
|
if (!(format & FMT_VIA))
|
return;
|
|
if (invflags & IPT_INV_VIA_IN) {
|
iface[0] = '!';
|
iface[1] = '\0';
|
} else
|
iface[0] = '\0';
|
|
if (iniface[0] != '\0')
|
strcat(iface, iniface);
|
else if (format & FMT_NUMERIC)
|
strcat(iface, "*");
|
else
|
strcat(iface, "any");
|
|
printf(FMT(" %-6s ","in %s "), iface);
|
|
if (invflags & IPT_INV_VIA_OUT) {
|
iface[0] = '!';
|
iface[1] = '\0';
|
} else
|
iface[0] = '\0';
|
|
if (outiface[0] != '\0')
|
strcat(iface, outiface);
|
else if (format & FMT_NUMERIC)
|
strcat(iface, "*");
|
else
|
strcat(iface, "any");
|
|
printf(FMT("%-6s ","out %s "), iface);
|
}
|
|
static void
|
print_iface(char letter, const char *iface, const unsigned char *mask, int inv)
|
{
|
unsigned int i;
|
|
if (mask[0] == 0)
|
return;
|
|
printf("%s-%c ", inv ? "! " : "", letter);
|
|
for (i = 0; i < IFNAMSIZ; i++) {
|
if (mask[i] != 0) {
|
if (iface[i] != '\0')
|
printf("%c", iface[i]);
|
} else {
|
if (iface[i-1] != '\0')
|
printf("+");
|
break;
|
}
|
}
|
|
printf(" ");
|
}
|
|
void save_firewall_details(const struct iptables_command_state *cs,
|
uint8_t invflags, uint16_t proto,
|
const char *iniface,
|
unsigned const char *iniface_mask,
|
const char *outiface,
|
unsigned const char *outiface_mask)
|
{
|
if (iniface != NULL) {
|
print_iface('i', iniface, iniface_mask,
|
invflags & IPT_INV_VIA_IN);
|
}
|
if (outiface != NULL) {
|
print_iface('o', outiface, outiface_mask,
|
invflags & IPT_INV_VIA_OUT);
|
}
|
|
if (proto > 0) {
|
const struct protoent *pent = getprotobynumber(proto);
|
|
if (invflags & XT_INV_PROTO)
|
printf("! ");
|
|
if (pent)
|
printf("-p %s ", pent->p_name);
|
else
|
printf("-p %u ", proto);
|
}
|
}
|
|
void save_counters(uint64_t pcnt, uint64_t bcnt)
|
{
|
printf("[%llu:%llu] ", (unsigned long long)pcnt,
|
(unsigned long long)bcnt);
|
}
|
|
void save_matches_and_target(struct xtables_rule_match *m,
|
struct xtables_target *target,
|
const char *jumpto, uint8_t flags, const void *fw)
|
{
|
struct xtables_rule_match *matchp;
|
|
for (matchp = m; matchp; matchp = matchp->next) {
|
if (matchp->match->alias) {
|
printf("-m %s",
|
matchp->match->alias(matchp->match->m));
|
} else
|
printf("-m %s", matchp->match->name);
|
|
if (matchp->match->save != NULL) {
|
/* cs->fw union makes the trick */
|
matchp->match->save(fw, matchp->match->m);
|
}
|
printf(" ");
|
}
|
|
if (target != NULL) {
|
if (target->alias) {
|
printf("-j %s", target->alias(target->t));
|
} else
|
printf("-j %s", jumpto);
|
|
if (target->save != NULL)
|
target->save(fw, target->t);
|
}
|
}
|
|
void print_matches_and_target(struct iptables_command_state *cs,
|
unsigned int format)
|
{
|
struct xtables_rule_match *matchp;
|
|
for (matchp = cs->matches; matchp; matchp = matchp->next) {
|
if (matchp->match->print != NULL) {
|
matchp->match->print(&cs->fw, matchp->match->m,
|
format & FMT_NUMERIC);
|
}
|
}
|
|
if (cs->target != NULL) {
|
if (cs->target->print != NULL) {
|
cs->target->print(&cs->fw, cs->target->t,
|
format & FMT_NUMERIC);
|
}
|
}
|
}
|
|
struct nft_family_ops *nft_family_ops_lookup(int family)
|
{
|
switch (family) {
|
case AF_INET:
|
return &nft_family_ops_ipv4;
|
case AF_INET6:
|
return &nft_family_ops_ipv6;
|
case NFPROTO_ARP:
|
return &nft_family_ops_arp;
|
case NFPROTO_BRIDGE:
|
return &nft_family_ops_bridge;
|
default:
|
break;
|
}
|
|
return NULL;
|
}
|
|
bool compare_matches(struct xtables_rule_match *mt1,
|
struct xtables_rule_match *mt2)
|
{
|
struct xtables_rule_match *mp1;
|
struct xtables_rule_match *mp2;
|
|
for (mp1 = mt1, mp2 = mt2; mp1 && mp2; mp1 = mp1->next, mp2 = mp2->next) {
|
struct xt_entry_match *m1 = mp1->match->m;
|
struct xt_entry_match *m2 = mp2->match->m;
|
|
if (strcmp(m1->u.user.name, m2->u.user.name) != 0) {
|
DEBUGP("mismatching match name\n");
|
return false;
|
}
|
|
if (m1->u.user.match_size != m2->u.user.match_size) {
|
DEBUGP("mismatching match size\n");
|
return false;
|
}
|
|
if (memcmp(m1->data, m2->data,
|
mp1->match->userspacesize) != 0) {
|
DEBUGP("mismatch match data\n");
|
return false;
|
}
|
}
|
|
/* Both cursors should be NULL */
|
if (mp1 != mp2) {
|
DEBUGP("mismatch matches amount\n");
|
return false;
|
}
|
|
return true;
|
}
|
|
bool compare_targets(struct xtables_target *tg1, struct xtables_target *tg2)
|
{
|
if (tg1 == NULL && tg2 == NULL)
|
return true;
|
|
if ((tg1 == NULL && tg2 != NULL) || (tg1 != NULL && tg2 == NULL))
|
return false;
|
|
if (strcmp(tg1->t->u.user.name, tg2->t->u.user.name) != 0)
|
return false;
|
|
if (memcmp(tg1->t->data, tg2->t->data, tg1->userspacesize) != 0)
|
return false;
|
|
return true;
|
}
|
|
bool nft_ipv46_rule_find(struct nft_family_ops *ops,
|
struct nftnl_rule *r, struct iptables_command_state *cs)
|
{
|
struct iptables_command_state this = {};
|
|
nft_rule_to_iptables_command_state(r, &this);
|
|
DEBUGP("comparing with... ");
|
#ifdef DEBUG_DEL
|
nft_rule_print_save(&this, r, NFT_RULE_APPEND, 0);
|
#endif
|
if (!ops->is_same(cs, &this))
|
return false;
|
|
if (!compare_matches(cs->matches, this.matches)) {
|
DEBUGP("Different matches\n");
|
return false;
|
}
|
|
if (!compare_targets(cs->target, this.target)) {
|
DEBUGP("Different target\n");
|
return false;
|
}
|
|
if (strcmp(cs->jumpto, this.jumpto) != 0) {
|
DEBUGP("Different verdict\n");
|
return false;
|
}
|
|
return true;
|
}
|
