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authorPablo Neira Ayuso <pablo@netfilter.org>2021-08-06 12:33:57 +0200
committerPablo Neira Ayuso <pablo@netfilter.org>2021-08-06 17:07:41 +0200
commit269fc69533de73a9065c0b7971bcd109880290b3 (patch)
treea5b3b789114719e8dfcafadc84cf9b77b63f67b3
parent4592ee7f525c4683ec9e290381601fdee50ae110 (diff)
netfilter: nfnetlink_hook: translate inet ingress to netdev
The NFPROTO_INET pseudofamily is not exposed through this new netlink interface. The netlink dump either shows NFPROTO_IPV4 or NFPROTO_IPV6 for NFPROTO_INET prerouting/input/forward/output/postrouting hooks. The NFNLA_CHAIN_FAMILY attribute provides the family chain, which specifies if this hook applies to inet traffic only (either IPv4 or IPv6). Translate the inet/ingress hook to netdev/ingress to fully hide the NFPROTO_INET implementation details. Fixes: e2cf17d3774c ("netfilter: add new hook nfnl subsystem") Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
-rw-r--r--net/netfilter/nfnetlink_hook.c8
1 files changed, 7 insertions, 1 deletions
diff --git a/net/netfilter/nfnetlink_hook.c b/net/netfilter/nfnetlink_hook.c
index 32eea785ae25..f554e2ea32ee 100644
--- a/net/netfilter/nfnetlink_hook.c
+++ b/net/netfilter/nfnetlink_hook.c
@@ -119,6 +119,7 @@ static int nfnl_hook_dump_one(struct sk_buff *nlskb,
unsigned int portid = NETLINK_CB(nlskb).portid;
struct nlmsghdr *nlh;
int ret = -EMSGSIZE;
+ u32 hooknum;
#ifdef CONFIG_KALLSYMS
char sym[KSYM_SYMBOL_LEN];
char *module_name;
@@ -156,7 +157,12 @@ static int nfnl_hook_dump_one(struct sk_buff *nlskb,
goto nla_put_failure;
#endif
- ret = nla_put_be32(nlskb, NFNLA_HOOK_HOOKNUM, htonl(ops->hooknum));
+ if (ops->pf == NFPROTO_INET && ops->hooknum == NF_INET_INGRESS)
+ hooknum = NF_NETDEV_INGRESS;
+ else
+ hooknum = ops->hooknum;
+
+ ret = nla_put_be32(nlskb, NFNLA_HOOK_HOOKNUM, htonl(hooknum));
if (ret)
goto nla_put_failure;