C++ (Cpp) nft_meta_get_eval示例

示例#1

文件： nft_meta_bridge.c 项目： mikuhatsune001/linux2.6.32

static void nft_meta_bridge_get_eval(const struct nft_expr *expr,
				     struct nft_data data[NFT_REG_MAX + 1],
				     const struct nft_pktinfo *pkt)
{
	const struct nft_meta *priv = nft_expr_priv(expr);
	const struct net_device *in = pkt->in, *out = pkt->out;
	struct nft_data *dest = &data[priv->dreg];
	const struct net_bridge_port *p;

	switch (priv->key) {
	case NFT_META_BRI_IIFNAME:
		if (in == NULL || (p = br_port_get_rcu(in)) == NULL)
			goto err;
		break;
	case NFT_META_BRI_OIFNAME:
		if (out == NULL || (p = br_port_get_rcu(out)) == NULL)
			goto err;
		break;
	default:
		goto out;
	}

	strncpy((char *)dest->data, p->br->dev->name, sizeof(dest->data));
	return;
out:
	return nft_meta_get_eval(expr, data, pkt);
err:
	data[NFT_REG_VERDICT].verdict = NFT_BREAK;
}

示例#2

文件： nft_meta_bridge.c 项目： acton393/linux

static void nft_meta_bridge_get_eval(const struct nft_expr *expr,
				     struct nft_regs *regs,
				     const struct nft_pktinfo *pkt)
{
	const struct nft_meta *priv = nft_expr_priv(expr);
	const struct net_device *in = pkt->in, *out = pkt->out;
	u32 *dest = &regs->data[priv->dreg];
	const struct net_bridge_port *p;

	switch (priv->key) {
	case NFT_META_BRI_IIFNAME:
		if (in == NULL || (p = br_port_get_rcu(in)) == NULL)
			goto err;
		break;
	case NFT_META_BRI_OIFNAME:
		if (out == NULL || (p = br_port_get_rcu(out)) == NULL)
			goto err;
		break;
	default:
		goto out;
	}

	strncpy((char *)dest, p->br->dev->name, IFNAMSIZ);
	return;
out:
	return nft_meta_get_eval(expr, regs, pkt);
err:
	regs->verdict.code = NFT_BREAK;
}