The goal of this patch set are to use the ASN.1 decoder library
to parse SNMP ASN.1 payload.
This patch set are same as previous patch
"[PATCH V2]netfilter: nf_nat_snmp_basic: use asn1 decoder library".
My test environment are below.
#Network
Client <-------------> Netfilter FW <-------------> SNMP Server
192.168.3.2 192.168.3.1 192.168.4.1 192.168.4.2
#FW commands
iptables -t raw -I PREROUTING -p udp -m multiport --dports 161,162 \
-j CT --helper snmp
echo 'file nf_nat_snmp_basic_main.c +p' > \
/sys/kernel/debug/dynamic_debug/control
#SNMP Server commands
sudo ip r a 192.168.3.2 via 192.168.4.1 dev enp2s0
#Client commands
sudo ip r a 192.168.4.2 via 192.168.3.1 dev enp3s0
To test basic snmp test, I used snmpwalk command because it is easy to use
snmpwalk -v <1 or 2c> -c public <ip address> OID
example)
snmpwalk -v 2c -c public 192.168.4.2 .1.3.6.1.2.1.4.21
so that we can see this message from dmesg.
"snmp_helper: 192.168.3.2 to 192.168.4.1"
And, to test snmp trap test, I used snmptrap command.
snmptrap -v 1 -c public 192.168.3.2 .1 192.168.4.2 0 0 0 .1 a \
192.168.4.2
snmptrap -v 2c -c public 192.168.3.2 .1 .1 .1 a 192.168.4.2
SNMPv1 trap includes two ip address in payload. so we can see below
message twice.
"snmp_helper: 192.168.4.2 to 192.168.3.1"
If you want to see asn1 decoder debug message, please use below command
echo 'file asn1_decoder.c +p' > /sys/kernel/debug/dynamic_debug/control
V4 :
- rename nf_nat_snmp_basic.c to nf_nat_snmp_basic_main.c
to fix compile error
V3 :
- be separated by previous patch.
V2 :
- Add missing nf_nat_snmp_basic.asn1 file
V1 :
- Initial patch
Taehee Yoo (5):
netfilter: nf_nat_snmp_basic: remove useless comment
netfilter: nf_nat_snmp_basic: remove debug parameter
netfilter: nf_nat_snmp_basic: replace ctinfo with dir.
netfilter: nf_nat_snmp_basic: use nf_ct_helper_log
netfilter: nf_nat_snmp_basic: use asn1 decoder library
net/ipv4/netfilter/Kconfig | 1 +
net/ipv4/netfilter/Makefile | 6 +
net/ipv4/netfilter/nf_nat_snmp_basic.asn1 | 177 +++
...f_nat_snmp_basic.c => nf_nat_snmp_basic_main.c} | 1181 ++------------------
4 files changed, 249 insertions(+), 1116 deletions(-)
create mode 100644 net/ipv4/netfilter/nf_nat_snmp_basic.asn1
rename net/ipv4/netfilter/{nf_nat_snmp_basic.c => nf_nat_snmp_basic_main.c} (15%)
--
2.9.3
--
To unsubscribe from this list: send the line "unsubscribe netfilter-devel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
