With netdev and bridge nfprotos, loggers may see arbitrary ethernet
frames. Print at least basic info like interfaces and MAC header data.
Signed-off-by: Phil Sutter <phil@xxxxxx>
---
net/netfilter/nf_log_syslog.c | 31 +++++++++++++++++++++++++++++++
1 file changed, 31 insertions(+)
diff --git a/net/netfilter/nf_log_syslog.c b/net/netfilter/nf_log_syslog.c
index d1dcf36545d79..a7ff6fdbafc94 100644
--- a/net/netfilter/nf_log_syslog.c
+++ b/net/netfilter/nf_log_syslog.c
@@ -894,6 +894,33 @@ static struct nf_logger nf_ip6_logger __read_mostly = {
.me = THIS_MODULE,
};
+static void nf_log_unknown_packet(struct net *net, u_int8_t pf,
+ unsigned int hooknum,
+ const struct sk_buff *skb,
+ const struct net_device *in,
+ const struct net_device *out,
+ const struct nf_loginfo *loginfo,
+ const char *prefix)
+{
+ struct nf_log_buf *m;
+
+ /* FIXME: Disabled from containers until syslog ns is supported */
+ if (!net_eq(net, &init_net) && !sysctl_nf_log_all_netns)
+ return;
+
+ m = nf_log_buf_open();
+
+ if (!loginfo)
+ loginfo = &default_loginfo;
+
+ nf_log_dump_packet_common(m, pf, hooknum, skb, in, out, loginfo,
+ prefix);
+
+ dump_mac_header(m, loginfo, skb);
+
+ nf_log_buf_close(m);
+}
+
static void nf_log_netdev_packet(struct net *net, u_int8_t pf,
unsigned int hooknum,
const struct sk_buff *skb,
@@ -913,6 +940,10 @@ static void nf_log_netdev_packet(struct net *net, u_int8_t pf,
case htons(ETH_P_RARP):
nf_log_arp_packet(net, pf, hooknum, skb, in, out, loginfo, prefix);
break;
+ default:
+ nf_log_unknown_packet(net, pf, hooknum, skb,
+ in, out, loginfo, prefix);
+ break;
}
}
--
2.34.1
