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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 | ||
7a4473a3 PNA |
8 | static inline void nft_set_pktinfo_ipv6(struct nft_pktinfo *pkt, |
9 | struct sk_buff *skb) | |
0ca743a5 | 10 | { |
568af6de | 11 | unsigned int flags = IP6_FH_F_AUTH; |
0ca743a5 PNA |
12 | int protohdr, thoff = 0; |
13 | unsigned short frag_off; | |
14 | ||
568af6de | 15 | protohdr = ipv6_find_hdr(pkt->skb, &thoff, -1, &frag_off, &flags); |
8df9e32e | 16 | if (protohdr < 0) { |
7a4473a3 | 17 | nft_set_pktinfo_unspec(pkt, skb); |
71212c9b | 18 | return; |
8df9e32e | 19 | } |
0ca743a5 | 20 | |
beac5afa | 21 | pkt->tprot_set = true; |
4566bf27 | 22 | pkt->tprot = protohdr; |
0ca743a5 PNA |
23 | pkt->xt.thoff = thoff; |
24 | pkt->xt.fragoff = frag_off; | |
0ca743a5 PNA |
25 | } |
26 | ||
7a4473a3 PNA |
27 | static inline int __nft_set_pktinfo_ipv6_validate(struct nft_pktinfo *pkt, |
28 | struct sk_buff *skb) | |
ddc8b602 PNA |
29 | { |
30 | #if IS_ENABLED(CONFIG_IPV6) | |
568af6de | 31 | unsigned int flags = IP6_FH_F_AUTH; |
ddc8b602 PNA |
32 | struct ipv6hdr *ip6h, _ip6h; |
33 | unsigned int thoff = 0; | |
34 | unsigned short frag_off; | |
35 | int protohdr; | |
36 | u32 pkt_len; | |
37 | ||
38 | ip6h = skb_header_pointer(skb, skb_network_offset(skb), sizeof(*ip6h), | |
39 | &_ip6h); | |
40 | if (!ip6h) | |
41 | return -1; | |
42 | ||
43 | if (ip6h->version != 6) | |
44 | return -1; | |
45 | ||
46 | pkt_len = ntohs(ip6h->payload_len); | |
47 | if (pkt_len + sizeof(*ip6h) > skb->len) | |
48 | return -1; | |
49 | ||
568af6de | 50 | protohdr = ipv6_find_hdr(pkt->skb, &thoff, -1, &frag_off, &flags); |
ddc8b602 PNA |
51 | if (protohdr < 0) |
52 | return -1; | |
53 | ||
54 | pkt->tprot_set = true; | |
55 | pkt->tprot = protohdr; | |
56 | pkt->xt.thoff = thoff; | |
57 | pkt->xt.fragoff = frag_off; | |
58 | ||
59 | return 0; | |
60 | #else | |
61 | return -1; | |
62 | #endif | |
63 | } | |
64 | ||
7a4473a3 PNA |
65 | static inline void nft_set_pktinfo_ipv6_validate(struct nft_pktinfo *pkt, |
66 | struct sk_buff *skb) | |
ddc8b602 | 67 | { |
7a4473a3 PNA |
68 | if (__nft_set_pktinfo_ipv6_validate(pkt, skb) < 0) |
69 | nft_set_pktinfo_unspec(pkt, skb); | |
ddc8b602 PNA |
70 | } |
71 | ||
0ca743a5 | 72 | #endif |