swh:1:snp:32555a3fd8878f019c2ebd6c964bc1edcaeff337
Tip revision: 6880fa6c56601bb8ed59df6c30fd390cc5f6dd8f authored by Linus Torvalds on 12 September 2021, 23:28:37 UTC
Linux 5.15-rc1
Linux 5.15-rc1
Tip revision: 6880fa6
nf_tables_ipv6.h
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _NF_TABLES_IPV6_H_
#define _NF_TABLES_IPV6_H_
#include <linux/netfilter_ipv6/ip6_tables.h>
#include <net/ipv6.h>
#include <net/netfilter/nf_tables.h>
static inline void nft_set_pktinfo_ipv6(struct nft_pktinfo *pkt)
{
unsigned int flags = IP6_FH_F_AUTH;
int protohdr, thoff = 0;
unsigned short frag_off;
protohdr = ipv6_find_hdr(pkt->skb, &thoff, -1, &frag_off, &flags);
if (protohdr < 0) {
nft_set_pktinfo_unspec(pkt);
return;
}
pkt->tprot_set = true;
pkt->tprot = protohdr;
pkt->thoff = thoff;
pkt->fragoff = frag_off;
}
static inline int __nft_set_pktinfo_ipv6_validate(struct nft_pktinfo *pkt)
{
#if IS_ENABLED(CONFIG_IPV6)
unsigned int flags = IP6_FH_F_AUTH;
struct ipv6hdr *ip6h, _ip6h;
unsigned int thoff = 0;
unsigned short frag_off;
int protohdr;
u32 pkt_len;
ip6h = skb_header_pointer(pkt->skb, skb_network_offset(pkt->skb),
sizeof(*ip6h), &_ip6h);
if (!ip6h)
return -1;
if (ip6h->version != 6)
return -1;
pkt_len = ntohs(ip6h->payload_len);
if (pkt_len + sizeof(*ip6h) > pkt->skb->len)
return -1;
protohdr = ipv6_find_hdr(pkt->skb, &thoff, -1, &frag_off, &flags);
if (protohdr < 0)
return -1;
pkt->tprot_set = true;
pkt->tprot = protohdr;
pkt->thoff = thoff;
pkt->fragoff = frag_off;
return 0;
#else
return -1;
#endif
}
static inline void nft_set_pktinfo_ipv6_validate(struct nft_pktinfo *pkt)
{
if (__nft_set_pktinfo_ipv6_validate(pkt) < 0)
nft_set_pktinfo_unspec(pkt);
}
static inline int nft_set_pktinfo_ipv6_ingress(struct nft_pktinfo *pkt)
{
#if IS_ENABLED(CONFIG_IPV6)
unsigned int flags = IP6_FH_F_AUTH;
unsigned short frag_off;
unsigned int thoff = 0;
struct inet6_dev *idev;
struct ipv6hdr *ip6h;
int protohdr;
u32 pkt_len;
if (!pskb_may_pull(pkt->skb, sizeof(*ip6h)))
return -1;
ip6h = ipv6_hdr(pkt->skb);
if (ip6h->version != 6)
goto inhdr_error;
pkt_len = ntohs(ip6h->payload_len);
if (pkt_len + sizeof(*ip6h) > pkt->skb->len) {
idev = __in6_dev_get(nft_in(pkt));
__IP6_INC_STATS(nft_net(pkt), idev, IPSTATS_MIB_INTRUNCATEDPKTS);
return -1;
}
protohdr = ipv6_find_hdr(pkt->skb, &thoff, -1, &frag_off, &flags);
if (protohdr < 0)
goto inhdr_error;
pkt->tprot_set = true;
pkt->tprot = protohdr;
pkt->thoff = thoff;
pkt->fragoff = frag_off;
return 0;
inhdr_error:
idev = __in6_dev_get(nft_in(pkt));
__IP6_INC_STATS(nft_net(pkt), idev, IPSTATS_MIB_INHDRERRORS);
return -1;
#else
return -1;
#endif
}
#endif