C++ (Cpp) nft_reject_icmp_code примеры использования

Пример #1

Файл: nft_reject_bridge.c Проект: AdityaChaudhary/linux

static void nft_reject_bridge_eval(const struct nft_expr *expr,
				 struct nft_data data[NFT_REG_MAX + 1],
				 const struct nft_pktinfo *pkt)
{
	struct nft_reject *priv = nft_expr_priv(expr);
	struct net *net = dev_net((pkt->in != NULL) ? pkt->in : pkt->out);
	const unsigned char *dest = eth_hdr(pkt->skb)->h_dest;

	if (is_broadcast_ether_addr(dest) ||
	    is_multicast_ether_addr(dest))
		goto out;

	switch (eth_hdr(pkt->skb)->h_proto) {
	case htons(ETH_P_IP):
		switch (priv->type) {
		case NFT_REJECT_ICMP_UNREACH:
			nft_reject_br_send_v4_unreach(pkt->skb,
						      pkt->ops->hooknum,
						      priv->icmp_code);
			break;
		case NFT_REJECT_TCP_RST:
			nft_reject_br_send_v4_tcp_reset(pkt->skb,
							pkt->ops->hooknum);
			break;
		case NFT_REJECT_ICMPX_UNREACH:
			nft_reject_br_send_v4_unreach(pkt->skb,
						      pkt->ops->hooknum,
						      nft_reject_icmp_code(priv->icmp_code));
			break;
		}
		break;
	case htons(ETH_P_IPV6):
		switch (priv->type) {
		case NFT_REJECT_ICMP_UNREACH:
			nft_reject_br_send_v6_unreach(net, pkt->skb,
						      pkt->ops->hooknum,
						      priv->icmp_code);
			break;
		case NFT_REJECT_TCP_RST:
			nft_reject_br_send_v6_tcp_reset(net, pkt->skb,
							pkt->ops->hooknum);
			break;
		case NFT_REJECT_ICMPX_UNREACH:
			nft_reject_br_send_v6_unreach(net, pkt->skb,
						      pkt->ops->hooknum,
						      nft_reject_icmpv6_code(priv->icmp_code));
			break;
		}
		break;
	default:
		/* No explicit way to reject this protocol, drop it. */
		break;
	}
out:
	data[NFT_REG_VERDICT].verdict = NF_DROP;
}

Пример #2

Файл: nft_reject_bridge.c Проект: asmalldev/linux

static void nft_reject_bridge_eval(const struct nft_expr *expr,
				   struct nft_regs *regs,
				   const struct nft_pktinfo *pkt)
{
	struct nft_reject *priv = nft_expr_priv(expr);
	const unsigned char *dest = eth_hdr(pkt->skb)->h_dest;

	if (is_broadcast_ether_addr(dest) ||
	    is_multicast_ether_addr(dest))
		goto out;

	switch (eth_hdr(pkt->skb)->h_proto) {
	case htons(ETH_P_IP):
		switch (priv->type) {
		case NFT_REJECT_ICMP_UNREACH:
			nft_reject_br_send_v4_unreach(nft_net(pkt), pkt->skb,
						      nft_in(pkt),
						      nft_hook(pkt),
						      priv->icmp_code);
			break;
		case NFT_REJECT_TCP_RST:
			nft_reject_br_send_v4_tcp_reset(nft_net(pkt), pkt->skb,
							nft_in(pkt),
							nft_hook(pkt));
			break;
		case NFT_REJECT_ICMPX_UNREACH:
			nft_reject_br_send_v4_unreach(nft_net(pkt), pkt->skb,
						      nft_in(pkt),
						      nft_hook(pkt),
						      nft_reject_icmp_code(priv->icmp_code));
			break;
		}
		break;
	case htons(ETH_P_IPV6):
		switch (priv->type) {
		case NFT_REJECT_ICMP_UNREACH:
			nft_reject_br_send_v6_unreach(nft_net(pkt), pkt->skb,
						      nft_in(pkt),
						      nft_hook(pkt),
						      priv->icmp_code);
			break;
		case NFT_REJECT_TCP_RST:
			nft_reject_br_send_v6_tcp_reset(nft_net(pkt), pkt->skb,
							nft_in(pkt),
							nft_hook(pkt));
			break;
		case NFT_REJECT_ICMPX_UNREACH:
			nft_reject_br_send_v6_unreach(nft_net(pkt), pkt->skb,
						      nft_in(pkt),
						      nft_hook(pkt),
						      nft_reject_icmpv6_code(priv->icmp_code));
			break;
		}
		break;
	default:
		/* No explicit way to reject this protocol, drop it. */
		break;
	}
out:
	regs->verdict.code = NF_DROP;
}