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0ca743a5 PNA |
1 | #ifndef _NF_TABLES_IPV6_H_ |
2 | #define _NF_TABLES_IPV6_H_ | |
3 | ||
4 | #include <linux/netfilter_ipv6/ip6_tables.h> | |
5 | #include <net/ipv6.h> | |
6 | ||
71212c9b | 7 | static inline void |
0ca743a5 | 8 | nft_set_pktinfo_ipv6(struct nft_pktinfo *pkt, |
0ca743a5 | 9 | struct sk_buff *skb, |
073bfd56 | 10 | const struct nf_hook_state *state) |
0ca743a5 PNA |
11 | { |
12 | int protohdr, thoff = 0; | |
13 | unsigned short frag_off; | |
14 | ||
6aa187f2 | 15 | nft_set_pktinfo(pkt, skb, state); |
0ca743a5 PNA |
16 | |
17 | protohdr = ipv6_find_hdr(pkt->skb, &thoff, -1, &frag_off, NULL); | |
8df9e32e PNA |
18 | if (protohdr < 0) { |
19 | nft_set_pktinfo_proto_unspec(pkt, skb); | |
71212c9b | 20 | return; |
8df9e32e | 21 | } |
0ca743a5 | 22 | |
beac5afa | 23 | pkt->tprot_set = true; |
4566bf27 | 24 | pkt->tprot = protohdr; |
0ca743a5 PNA |
25 | pkt->xt.thoff = thoff; |
26 | pkt->xt.fragoff = frag_off; | |
0ca743a5 PNA |
27 | } |
28 | ||
ddc8b602 PNA |
29 | static inline int |
30 | __nft_set_pktinfo_ipv6_validate(struct nft_pktinfo *pkt, | |
31 | struct sk_buff *skb, | |
32 | const struct nf_hook_state *state) | |
33 | { | |
34 | #if IS_ENABLED(CONFIG_IPV6) | |
35 | struct ipv6hdr *ip6h, _ip6h; | |
36 | unsigned int thoff = 0; | |
37 | unsigned short frag_off; | |
38 | int protohdr; | |
39 | u32 pkt_len; | |
40 | ||
41 | ip6h = skb_header_pointer(skb, skb_network_offset(skb), sizeof(*ip6h), | |
42 | &_ip6h); | |
43 | if (!ip6h) | |
44 | return -1; | |
45 | ||
46 | if (ip6h->version != 6) | |
47 | return -1; | |
48 | ||
49 | pkt_len = ntohs(ip6h->payload_len); | |
50 | if (pkt_len + sizeof(*ip6h) > skb->len) | |
51 | return -1; | |
52 | ||
53 | protohdr = ipv6_find_hdr(pkt->skb, &thoff, -1, &frag_off, NULL); | |
54 | if (protohdr < 0) | |
55 | return -1; | |
56 | ||
57 | pkt->tprot_set = true; | |
58 | pkt->tprot = protohdr; | |
59 | pkt->xt.thoff = thoff; | |
60 | pkt->xt.fragoff = frag_off; | |
61 | ||
62 | return 0; | |
63 | #else | |
64 | return -1; | |
65 | #endif | |
66 | } | |
67 | ||
68 | static inline void | |
69 | nft_set_pktinfo_ipv6_validate(struct nft_pktinfo *pkt, | |
70 | struct sk_buff *skb, | |
71 | const struct nf_hook_state *state) | |
72 | { | |
73 | nft_set_pktinfo(pkt, skb, state); | |
74 | if (__nft_set_pktinfo_ipv6_validate(pkt, skb, state) < 0) | |
75 | nft_set_pktinfo_proto_unspec(pkt, skb); | |
76 | } | |
77 | ||
1d49144c PM |
78 | extern struct nft_af_info nft_af_ipv6; |
79 | ||
0ca743a5 | 80 | #endif |