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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
0ca743a5 PNA |
2 | #ifndef _NF_TABLES_IPV6_H_ |
3 | #define _NF_TABLES_IPV6_H_ | |
4 | ||
5 | #include <linux/netfilter_ipv6/ip6_tables.h> | |
6 | #include <net/ipv6.h> | |
7 | ||
71212c9b | 8 | static inline void |
0ca743a5 | 9 | nft_set_pktinfo_ipv6(struct nft_pktinfo *pkt, |
0ca743a5 | 10 | struct sk_buff *skb, |
073bfd56 | 11 | const struct nf_hook_state *state) |
0ca743a5 | 12 | { |
568af6de | 13 | unsigned int flags = IP6_FH_F_AUTH; |
0ca743a5 PNA |
14 | int protohdr, thoff = 0; |
15 | unsigned short frag_off; | |
16 | ||
6aa187f2 | 17 | nft_set_pktinfo(pkt, skb, state); |
0ca743a5 | 18 | |
568af6de | 19 | protohdr = ipv6_find_hdr(pkt->skb, &thoff, -1, &frag_off, &flags); |
8df9e32e PNA |
20 | if (protohdr < 0) { |
21 | nft_set_pktinfo_proto_unspec(pkt, skb); | |
71212c9b | 22 | return; |
8df9e32e | 23 | } |
0ca743a5 | 24 | |
beac5afa | 25 | pkt->tprot_set = true; |
4566bf27 | 26 | pkt->tprot = protohdr; |
0ca743a5 PNA |
27 | pkt->xt.thoff = thoff; |
28 | pkt->xt.fragoff = frag_off; | |
0ca743a5 PNA |
29 | } |
30 | ||
ddc8b602 PNA |
31 | static inline int |
32 | __nft_set_pktinfo_ipv6_validate(struct nft_pktinfo *pkt, | |
33 | struct sk_buff *skb, | |
34 | const struct nf_hook_state *state) | |
35 | { | |
36 | #if IS_ENABLED(CONFIG_IPV6) | |
568af6de | 37 | unsigned int flags = IP6_FH_F_AUTH; |
ddc8b602 PNA |
38 | struct ipv6hdr *ip6h, _ip6h; |
39 | unsigned int thoff = 0; | |
40 | unsigned short frag_off; | |
41 | int protohdr; | |
42 | u32 pkt_len; | |
43 | ||
44 | ip6h = skb_header_pointer(skb, skb_network_offset(skb), sizeof(*ip6h), | |
45 | &_ip6h); | |
46 | if (!ip6h) | |
47 | return -1; | |
48 | ||
49 | if (ip6h->version != 6) | |
50 | return -1; | |
51 | ||
52 | pkt_len = ntohs(ip6h->payload_len); | |
53 | if (pkt_len + sizeof(*ip6h) > skb->len) | |
54 | return -1; | |
55 | ||
568af6de | 56 | protohdr = ipv6_find_hdr(pkt->skb, &thoff, -1, &frag_off, &flags); |
ddc8b602 PNA |
57 | if (protohdr < 0) |
58 | return -1; | |
59 | ||
60 | pkt->tprot_set = true; | |
61 | pkt->tprot = protohdr; | |
62 | pkt->xt.thoff = thoff; | |
63 | pkt->xt.fragoff = frag_off; | |
64 | ||
65 | return 0; | |
66 | #else | |
67 | return -1; | |
68 | #endif | |
69 | } | |
70 | ||
71 | static inline void | |
72 | nft_set_pktinfo_ipv6_validate(struct nft_pktinfo *pkt, | |
73 | struct sk_buff *skb, | |
74 | const struct nf_hook_state *state) | |
75 | { | |
76 | nft_set_pktinfo(pkt, skb, state); | |
77 | if (__nft_set_pktinfo_ipv6_validate(pkt, skb, state) < 0) | |
78 | nft_set_pktinfo_proto_unspec(pkt, skb); | |
79 | } | |
80 | ||
1d49144c PM |
81 | extern struct nft_af_info nft_af_ipv6; |
82 | ||
0ca743a5 | 83 | #endif |