diff options
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/audit.c | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/kernel/audit.c b/kernel/audit.c index 26a332ffb1b8..5c302c4592db 100644 --- a/kernel/audit.c +++ b/kernel/audit.c @@ -58,6 +58,8 @@ #include <linux/freezer.h> #include <linux/pid_namespace.h> #include <net/netns/generic.h> +#include <net/ip.h> +#include <net/ipv6.h> #include "audit.h" @@ -2488,6 +2490,68 @@ void audit_log_path_denied(int type, const char *operation) audit_log_end(ab); } +int audit_log_nf_skb(struct audit_buffer *ab, + const struct sk_buff *skb, u8 nfproto) +{ + /* find the IP protocol in the case of NFPROTO_BRIDGE */ + if (nfproto == NFPROTO_BRIDGE) { + switch (eth_hdr(skb)->h_proto) { + case htons(ETH_P_IP): + nfproto = NFPROTO_IPV4; + break; + case htons(ETH_P_IPV6): + nfproto = NFPROTO_IPV6; + break; + default: + goto unknown_proto; + } + } + + switch (nfproto) { + case NFPROTO_IPV4: { + struct iphdr iph; + const struct iphdr *ih; + + ih = skb_header_pointer(skb, skb_network_offset(skb), + sizeof(iph), &iph); + if (!ih) + return -ENOMEM; + + audit_log_format(ab, " saddr=%pI4 daddr=%pI4 proto=%hhu", + &ih->saddr, &ih->daddr, ih->protocol); + break; + } + case NFPROTO_IPV6: { + struct ipv6hdr iph; + const struct ipv6hdr *ih; + u8 nexthdr; + __be16 frag_off; + + ih = skb_header_pointer(skb, skb_network_offset(skb), + sizeof(iph), &iph); + if (!ih) + return -ENOMEM; + + nexthdr = ih->nexthdr; + ipv6_skip_exthdr(skb, skb_network_offset(skb) + sizeof(iph), + &nexthdr, &frag_off); + + audit_log_format(ab, " saddr=%pI6c daddr=%pI6c proto=%hhu", + &ih->saddr, &ih->daddr, nexthdr); + break; + } + default: + goto unknown_proto; + } + + return 0; + +unknown_proto: + audit_log_format(ab, " saddr=? daddr=? proto=?"); + return -EPFNOSUPPORT; +} +EXPORT_SYMBOL(audit_log_nf_skb); + /* global counter which is incremented every time something logs in */ static atomic_t session_id = ATOMIC_INIT(0); |