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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 | 11 | { |
568af6de | 12 | unsigned int flags = IP6_FH_F_AUTH; |
0ca743a5 PNA |
13 | int protohdr, thoff = 0; |
14 | unsigned short frag_off; | |
15 | ||
6aa187f2 | 16 | nft_set_pktinfo(pkt, skb, state); |
0ca743a5 | 17 | |
568af6de | 18 | protohdr = ipv6_find_hdr(pkt->skb, &thoff, -1, &frag_off, &flags); |
8df9e32e PNA |
19 | if (protohdr < 0) { |
20 | nft_set_pktinfo_proto_unspec(pkt, skb); | |
71212c9b | 21 | return; |
8df9e32e | 22 | } |
0ca743a5 | 23 | |
beac5afa | 24 | pkt->tprot_set = true; |
4566bf27 | 25 | pkt->tprot = protohdr; |
0ca743a5 PNA |
26 | pkt->xt.thoff = thoff; |
27 | pkt->xt.fragoff = frag_off; | |
0ca743a5 PNA |
28 | } |
29 | ||
ddc8b602 PNA |
30 | static inline int |
31 | __nft_set_pktinfo_ipv6_validate(struct nft_pktinfo *pkt, | |
32 | struct sk_buff *skb, | |
33 | const struct nf_hook_state *state) | |
34 | { | |
35 | #if IS_ENABLED(CONFIG_IPV6) | |
568af6de | 36 | unsigned int flags = IP6_FH_F_AUTH; |
ddc8b602 PNA |
37 | struct ipv6hdr *ip6h, _ip6h; |
38 | unsigned int thoff = 0; | |
39 | unsigned short frag_off; | |
40 | int protohdr; | |
41 | u32 pkt_len; | |
42 | ||
43 | ip6h = skb_header_pointer(skb, skb_network_offset(skb), sizeof(*ip6h), | |
44 | &_ip6h); | |
45 | if (!ip6h) | |
46 | return -1; | |
47 | ||
48 | if (ip6h->version != 6) | |
49 | return -1; | |
50 | ||
51 | pkt_len = ntohs(ip6h->payload_len); | |
52 | if (pkt_len + sizeof(*ip6h) > skb->len) | |
53 | return -1; | |
54 | ||
568af6de | 55 | protohdr = ipv6_find_hdr(pkt->skb, &thoff, -1, &frag_off, &flags); |
ddc8b602 PNA |
56 | if (protohdr < 0) |
57 | return -1; | |
58 | ||
59 | pkt->tprot_set = true; | |
60 | pkt->tprot = protohdr; | |
61 | pkt->xt.thoff = thoff; | |
62 | pkt->xt.fragoff = frag_off; | |
63 | ||
64 | return 0; | |
65 | #else | |
66 | return -1; | |
67 | #endif | |
68 | } | |
69 | ||
70 | static inline void | |
71 | nft_set_pktinfo_ipv6_validate(struct nft_pktinfo *pkt, | |
72 | struct sk_buff *skb, | |
73 | const struct nf_hook_state *state) | |
74 | { | |
75 | nft_set_pktinfo(pkt, skb, state); | |
76 | if (__nft_set_pktinfo_ipv6_validate(pkt, skb, state) < 0) | |
77 | nft_set_pktinfo_proto_unspec(pkt, skb); | |
78 | } | |
79 | ||
1d49144c PM |
80 | extern struct nft_af_info nft_af_ipv6; |
81 | ||
0ca743a5 | 82 | #endif |