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Message-Id: <20201027135436.605098963@linuxfoundation.org>
Date: Tue, 27 Oct 2020 14:53:04 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org, Pablo Neira Ayuso <pablo@...filter.org>,
Sasha Levin <sashal@...nel.org>
Subject: [PATCH 4.19 126/264] netfilter: nf_log: missing vlan offload tag and proto
From: Pablo Neira Ayuso <pablo@...filter.org>
[ Upstream commit 0d9826bc18ce356e8909919ad681ad65d0a6061e ]
Dump vlan tag and proto for the usual vlan offload case if the
NF_LOG_MACDECODE flag is set on. Without this information the logging is
misleading as there is no reference to the VLAN header.
[12716.993704] test: IN=veth0 OUT= MACSRC=86:6c:92:ea:d6:73 MACDST=0e:3b:eb:86:73:76 VPROTO=8100 VID=10 MACPROTO=0800 SRC=192.168.10.2 DST=172.217.168.163 LEN=52 TOS=0x00 PREC=0x00 TTL=64 ID=2548 DF PROTO=TCP SPT=55848 DPT=80 WINDOW=501 RES=0x00 ACK FIN URGP=0
[12721.157643] test: IN=veth0 OUT= MACSRC=86:6c:92:ea:d6:73 MACDST=0e:3b:eb:86:73:76 VPROTO=8100 VID=10 MACPROTO=0806 ARP HTYPE=1 PTYPE=0x0800 OPCODE=2 MACSRC=86:6c:92:ea:d6:73 IPSRC=192.168.10.2 MACDST=0e:3b:eb:86:73:76 IPDST=192.168.10.1
Fixes: 83e96d443b37 ("netfilter: log: split family specific code to nf_log_{ip,ip6,common}.c files")
Signed-off-by: Pablo Neira Ayuso <pablo@...filter.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
include/net/netfilter/nf_log.h | 1 +
net/ipv4/netfilter/nf_log_arp.c | 19 +++++++++++++++++--
net/ipv4/netfilter/nf_log_ipv4.c | 6 ++++--
net/ipv6/netfilter/nf_log_ipv6.c | 8 +++++---
net/netfilter/nf_log_common.c | 12 ++++++++++++
5 files changed, 39 insertions(+), 7 deletions(-)
diff --git a/include/net/netfilter/nf_log.h b/include/net/netfilter/nf_log.h
index 0d3920896d502..716db4a0fed89 100644
--- a/include/net/netfilter/nf_log.h
+++ b/include/net/netfilter/nf_log.h
@@ -108,6 +108,7 @@ int nf_log_dump_tcp_header(struct nf_log_buf *m, const struct sk_buff *skb,
unsigned int logflags);
void nf_log_dump_sk_uid_gid(struct net *net, struct nf_log_buf *m,
struct sock *sk);
+void nf_log_dump_vlan(struct nf_log_buf *m, const struct sk_buff *skb);
void nf_log_dump_packet_common(struct nf_log_buf *m, u_int8_t pf,
unsigned int hooknum, const struct sk_buff *skb,
const struct net_device *in,
diff --git a/net/ipv4/netfilter/nf_log_arp.c b/net/ipv4/netfilter/nf_log_arp.c
index df5c2a2061a4b..19fff2c589fac 100644
--- a/net/ipv4/netfilter/nf_log_arp.c
+++ b/net/ipv4/netfilter/nf_log_arp.c
@@ -46,16 +46,31 @@ static void dump_arp_packet(struct nf_log_buf *m,
const struct nf_loginfo *info,
const struct sk_buff *skb, unsigned int nhoff)
{
- const struct arphdr *ah;
- struct arphdr _arph;
const struct arppayload *ap;
struct arppayload _arpp;
+ const struct arphdr *ah;
+ unsigned int logflags;
+ struct arphdr _arph;
ah = skb_header_pointer(skb, 0, sizeof(_arph), &_arph);
if (ah == NULL) {
nf_log_buf_add(m, "TRUNCATED");
return;
}
+
+ if (info->type == NF_LOG_TYPE_LOG)
+ logflags = info->u.log.logflags;
+ else
+ logflags = NF_LOG_DEFAULT_MASK;
+
+ if (logflags & NF_LOG_MACDECODE) {
+ nf_log_buf_add(m, "MACSRC=%pM MACDST=%pM ",
+ eth_hdr(skb)->h_source, eth_hdr(skb)->h_dest);
+ nf_log_dump_vlan(m, skb);
+ nf_log_buf_add(m, "MACPROTO=%04x ",
+ ntohs(eth_hdr(skb)->h_proto));
+ }
+
nf_log_buf_add(m, "ARP HTYPE=%d PTYPE=0x%04x OPCODE=%d",
ntohs(ah->ar_hrd), ntohs(ah->ar_pro), ntohs(ah->ar_op));
diff --git a/net/ipv4/netfilter/nf_log_ipv4.c b/net/ipv4/netfilter/nf_log_ipv4.c
index 1e6f28c97d3a2..cde1918607e9c 100644
--- a/net/ipv4/netfilter/nf_log_ipv4.c
+++ b/net/ipv4/netfilter/nf_log_ipv4.c
@@ -287,8 +287,10 @@ static void dump_ipv4_mac_header(struct nf_log_buf *m,
switch (dev->type) {
case ARPHRD_ETHER:
- nf_log_buf_add(m, "MACSRC=%pM MACDST=%pM MACPROTO=%04x ",
- eth_hdr(skb)->h_source, eth_hdr(skb)->h_dest,
+ nf_log_buf_add(m, "MACSRC=%pM MACDST=%pM ",
+ eth_hdr(skb)->h_source, eth_hdr(skb)->h_dest);
+ nf_log_dump_vlan(m, skb);
+ nf_log_buf_add(m, "MACPROTO=%04x ",
ntohs(eth_hdr(skb)->h_proto));
return;
default:
diff --git a/net/ipv6/netfilter/nf_log_ipv6.c b/net/ipv6/netfilter/nf_log_ipv6.c
index c6bf580d0f331..c456e2f902b93 100644
--- a/net/ipv6/netfilter/nf_log_ipv6.c
+++ b/net/ipv6/netfilter/nf_log_ipv6.c
@@ -300,9 +300,11 @@ static void dump_ipv6_mac_header(struct nf_log_buf *m,
switch (dev->type) {
case ARPHRD_ETHER:
- nf_log_buf_add(m, "MACSRC=%pM MACDST=%pM MACPROTO=%04x ",
- eth_hdr(skb)->h_source, eth_hdr(skb)->h_dest,
- ntohs(eth_hdr(skb)->h_proto));
+ nf_log_buf_add(m, "MACSRC=%pM MACDST=%pM ",
+ eth_hdr(skb)->h_source, eth_hdr(skb)->h_dest);
+ nf_log_dump_vlan(m, skb);
+ nf_log_buf_add(m, "MACPROTO=%04x ",
+ ntohs(eth_hdr(skb)->h_proto));
return;
default:
break;
diff --git a/net/netfilter/nf_log_common.c b/net/netfilter/nf_log_common.c
index a8c5c846aec10..b164a0e1e0536 100644
--- a/net/netfilter/nf_log_common.c
+++ b/net/netfilter/nf_log_common.c
@@ -176,6 +176,18 @@ nf_log_dump_packet_common(struct nf_log_buf *m, u_int8_t pf,
}
EXPORT_SYMBOL_GPL(nf_log_dump_packet_common);
+void nf_log_dump_vlan(struct nf_log_buf *m, const struct sk_buff *skb)
+{
+ u16 vid;
+
+ if (!skb_vlan_tag_present(skb))
+ return;
+
+ vid = skb_vlan_tag_get(skb);
+ nf_log_buf_add(m, "VPROTO=%04x VID=%u ", ntohs(skb->vlan_proto), vid);
+}
+EXPORT_SYMBOL_GPL(nf_log_dump_vlan);
+
/* bridge and netdev logging families share this code. */
void nf_log_l2packet(struct net *net, u_int8_t pf,
__be16 protocol,
--
2.25.1
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