diff options
| -rw-r--r-- | include/linux/filter.h | 3 | ||||
| -rw-r--r-- | net/core/filter.c | 17 |
2 files changed, 19 insertions, 1 deletions
diff --git a/include/linux/filter.h b/include/linux/filter.h index 673e5677ebcc..b6ea9aa9e853 100644 --- a/include/linux/filter.h +++ b/include/linux/filter.h @@ -121,7 +121,8 @@ struct sock_fprog /* Required for SO_ATTACH_FILTER. */ #define SKF_AD_PROTOCOL 0 #define SKF_AD_PKTTYPE 4 #define SKF_AD_IFINDEX 8 -#define SKF_AD_MAX 12 +#define SKF_AD_NLATTR 12 +#define SKF_AD_MAX 16 #define SKF_NET_OFF (-0x100000) #define SKF_LL_OFF (-0x200000) diff --git a/net/core/filter.c b/net/core/filter.c index bbb53c69857c..f5f3cf603064 100644 --- a/net/core/filter.c +++ b/net/core/filter.c @@ -27,6 +27,7 @@ #include <linux/if_packet.h> #include <net/ip.h> #include <net/protocol.h> +#include <net/netlink.h> #include <linux/skbuff.h> #include <net/sock.h> #include <linux/errno.h> @@ -303,6 +304,22 @@ load_b: case SKF_AD_IFINDEX: A = skb->dev->ifindex; continue; + case SKF_AD_NLATTR: { + struct nlattr *nla; + + if (skb_is_nonlinear(skb)) + return 0; + if (A > skb->len - sizeof(struct nlattr)) + return 0; + + nla = nla_find((struct nlattr *)&skb->data[A], + skb->len - A, X); + if (nla) + A = (void *)nla - (void *)skb->data; + else + A = 0; + continue; + } default: return 0; } |