Commit 673ab46f authored by Liping Zhang's avatar Liping Zhang Committed by Pablo Neira Ayuso

netfilter: nf_log: do not assume ethernet header in netdev family

In netdev family, we will handle non ethernet packets, so using
eth_hdr(skb)->h_proto is incorrect.

Meanwhile, we can use socket(AF_PACKET...) to sending packets, so
skb->protocol is not always set in bridge family.

Add an extra parameter into nf_log_l2packet to solve this issue.

Fixes: 1fddf4ba ("netfilter: nf_log: add packet logging for netdev family")
Signed-off-by: default avatarLiping Zhang <zlpnobody@gmail.com>
Signed-off-by: default avatarPablo Neira Ayuso <pablo@netfilter.org>
parent b8ad652f
......@@ -109,7 +109,9 @@ void nf_log_dump_packet_common(struct nf_log_buf *m, u_int8_t pf,
const struct net_device *out,
const struct nf_loginfo *loginfo,
const char *prefix);
void nf_log_l2packet(struct net *net, u_int8_t pf, unsigned int hooknum,
void nf_log_l2packet(struct net *net, u_int8_t pf,
__be16 protocol,
unsigned int hooknum,
const struct sk_buff *skb,
const struct net_device *in,
const struct net_device *out,
......
......@@ -24,7 +24,8 @@ static void nf_log_bridge_packet(struct net *net, u_int8_t pf,
const struct nf_loginfo *loginfo,
const char *prefix)
{
nf_log_l2packet(net, pf, hooknum, skb, in, out, loginfo, prefix);
nf_log_l2packet(net, pf, eth_hdr(skb)->h_proto, hooknum, skb,
in, out, loginfo, prefix);
}
static struct nf_logger nf_bridge_logger __read_mostly = {
......
......@@ -177,6 +177,7 @@ EXPORT_SYMBOL_GPL(nf_log_dump_packet_common);
/* bridge and netdev logging families share this code. */
void nf_log_l2packet(struct net *net, u_int8_t pf,
__be16 protocol,
unsigned int hooknum,
const struct sk_buff *skb,
const struct net_device *in,
......@@ -184,7 +185,7 @@ void nf_log_l2packet(struct net *net, u_int8_t pf,
const struct nf_loginfo *loginfo,
const char *prefix)
{
switch (eth_hdr(skb)->h_proto) {
switch (protocol) {
case htons(ETH_P_IP):
nf_log_packet(net, NFPROTO_IPV4, hooknum, skb, in, out,
loginfo, "%s", prefix);
......
......@@ -23,7 +23,8 @@ static void nf_log_netdev_packet(struct net *net, u_int8_t pf,
const struct nf_loginfo *loginfo,
const char *prefix)
{
nf_log_l2packet(net, pf, hooknum, skb, in, out, loginfo, prefix);
nf_log_l2packet(net, pf, skb->protocol, hooknum, skb, in, out,
loginfo, prefix);
}
static struct nf_logger nf_netdev_logger __read_mostly = {
......
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