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- // SPDX-License-Identifier: GPL-2.0-only
- /*
- * Copyright (c) 2015 Pablo Neira Ayuso <pablo@netfilter.org>
- */
- #include <linux/kernel.h>
- #include <linux/init.h>
- #include <linux/module.h>
- #include <linux/netlink.h>
- #include <linux/netfilter.h>
- #include <linux/netfilter/nf_tables.h>
- #include <net/netfilter/nf_tables.h>
- #include <net/netfilter/nf_tables_offload.h>
- #include <net/netfilter/nf_dup_netdev.h>
- static void nf_do_netdev_egress(struct sk_buff *skb, struct net_device *dev)
- {
- if (skb_mac_header_was_set(skb))
- skb_push(skb, skb->mac_len);
- skb->dev = dev;
- skb->tstamp = 0;
- dev_queue_xmit(skb);
- }
- void nf_fwd_netdev_egress(const struct nft_pktinfo *pkt, int oif)
- {
- struct net_device *dev;
- dev = dev_get_by_index_rcu(nft_net(pkt), oif);
- if (!dev) {
- kfree_skb(pkt->skb);
- return;
- }
- nf_do_netdev_egress(pkt->skb, dev);
- }
- EXPORT_SYMBOL_GPL(nf_fwd_netdev_egress);
- void nf_dup_netdev_egress(const struct nft_pktinfo *pkt, int oif)
- {
- struct net_device *dev;
- struct sk_buff *skb;
- dev = dev_get_by_index_rcu(nft_net(pkt), oif);
- if (dev == NULL)
- return;
- skb = skb_clone(pkt->skb, GFP_ATOMIC);
- if (skb)
- nf_do_netdev_egress(skb, dev);
- }
- EXPORT_SYMBOL_GPL(nf_dup_netdev_egress);
- int nft_fwd_dup_netdev_offload(struct nft_offload_ctx *ctx,
- struct nft_flow_rule *flow,
- enum flow_action_id id, int oif)
- {
- struct flow_action_entry *entry;
- struct net_device *dev;
- /* nft_flow_rule_destroy() releases the reference on this device. */
- dev = dev_get_by_index(ctx->net, oif);
- if (!dev)
- return -EOPNOTSUPP;
- entry = &flow->rule->action.entries[ctx->num_actions++];
- entry->id = id;
- entry->dev = dev;
- return 0;
- }
- EXPORT_SYMBOL_GPL(nft_fwd_dup_netdev_offload);
- MODULE_LICENSE("GPL");
- MODULE_AUTHOR("Pablo Neira Ayuso <pablo@netfilter.org>");
- MODULE_DESCRIPTION("Netfilter packet duplication support");
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