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| author |   Pablo Neira Ayuso <pablo@netfilter.org> | 2019-10-31 15:51:22 +0100 |
|---|---|---|
| committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2019-11-13 10:41:35 +0100 |
| commit | 8dfd8b09aa347ec96db3b355ad5c82fc6c837bfa (patch) | |
| tree | 2a79ea78872d353bbe49ea4dba85fadebb4b04fe /net/netfilter/nft_payload.c | |
| parent | netfilter: nft_payload: simplify vlan header handling (diff) | |
| download | linux-dev-8dfd8b09aa347ec96db3b355ad5c82fc6c837bfa.tar.xz linux-dev-8dfd8b09aa347ec96db3b355ad5c82fc6c837bfa.zip | |
netfilter: nf_tables: add nft_payload_rebuild_vlan_hdr()
Wrap the code to rebuild the ethernet + vlan header into a function.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Acked-by: Florian Westphal <fw@strlen.de>
Diffstat (limited to 'net/netfilter/nft_payload.c')
| -rw-r--r-- | net/netfilter/nft_payload.c | 19 |
1 files changed, 14 insertions, 5 deletions
diff --git a/net/netfilter/nft_payload.c b/net/netfilter/nft_payload.c index 247799801165..3db9c802ea62 100644 --- a/net/netfilter/nft_payload.c +++ b/net/netfilter/nft_payload.c @@ -23,6 +23,19 @@ #include <linux/ip.h> #include <linux/ipv6.h> +static bool nft_payload_rebuild_vlan_hdr(const struct sk_buff *skb, int mac_off, + struct vlan_ethhdr *veth) +{ + if (skb_copy_bits(skb, mac_off, veth, ETH_HLEN)) + return false; + + veth->h_vlan_proto = skb->vlan_proto; + veth->h_vlan_TCI = htons(skb_vlan_tag_get(skb)); + veth->h_vlan_encapsulated_proto = skb->protocol; + + return true; +} + /* add vlan header into the user buffer for if tag was removed by offloads */ static bool nft_payload_copy_vlan(u32 *d, const struct sk_buff *skb, u8 offset, u8 len) @@ -35,13 +48,9 @@ nft_payload_copy_vlan(u32 *d, const struct sk_buff *skb, u8 offset, u8 len) if (offset < VLAN_ETH_HLEN) { u8 ethlen = len; - if (skb_copy_bits(skb, mac_off, &veth, ETH_HLEN)) + if (!nft_payload_rebuild_vlan_hdr(skb, mac_off, &veth)) return false; - veth.h_vlan_proto = skb->vlan_proto; - veth.h_vlan_TCI = htons(skb_vlan_tag_get(skb)); - veth.h_vlan_encapsulated_proto = skb->protocol; - if (offset + len > VLAN_ETH_HLEN) ethlen -= offset + len - VLAN_ETH_HLEN; |