tcpdp

README

tcpdp

tcpdp is TCP dump tool with custom dumper written in Go.

Usage

tcpdp proxy : TCP proxy server mode

$ tcpdp proxy -l localhost:12345 -r localhost:1234 -d hex # hex.Dump()

$ tcpdp proxy -l localhost:55432 -r localhost:5432 -d pg # Dump query of PostgreSQL

$ tcpdp proxy -l localhost:33306 -r localhost:3306 -d mysql # Dump query of MySQL

With server-starter

https://github.com/lestrrat-go/server-starter

$ start_server --port 33306 -- tcpdp proxy -s -r localhost:3306 -d mysql

With config file

$ tcpdp proxy -c config.toml

tcpdp probe : Probe mode (like tcpdump)

$ tcpdp probe -i lo0 -t localhost:3306 -d mysql # is almost the same setting as 'tcpdump -i lo0 host 127.0.0.1 and tcp port 3306'

$ tcpdp probe -i eth0 -t 3306 -d hex # is almost the same setting as 'tcpdump -i eth0 tcp port 3306'

tcpdp read : Read pcap file mode

$ tcpdump -i eth0 host 127.0.0.1 and tcp port 3306 -w mysql.pcap
$ tcpdp read mysql.pcap -d mysql -f ltsv

tcpdp config Create config

$ tcpdp config > myconfig.toml

Show current config

$ tcpdp config

config format

[tcpdp]
pidfile = "/var/run/tcpdp.pid"
dumper = "mysql"

[probe]
target = "db.example.com:3306"
interface = "en0"

[proxy]
useServerSterter = false
listenAddr = "localhost:3306"
remoteAddr = "db.example.com:3306"

[log]
dir = "/var/log/tcpdp"
enable = true
stdout = true
format = "ltsv"
rotateEnable = true
rotationTime = "daily"
rotationCount = 7

[dumpLog]
dir = "/var/log/dump"
enable = true
stdout = false
format = "json"
rotateEnable = true
rotationTime = "hourly"
rotationCount = 24

tcpdp proxy connection diagram

      client_addr
           ^
           |        tcpdp
+----------|---------------+
|          v               |
|  proxy_listen_addr       |
|         + ^              |
|         | |   +--------+ |
|         |<----+ dumper | |
|         | |<--+        | |
|         | |   +--------+ |
|         v +              |
|  proxy_client_addr       |
|          ^               |
+----------|---------------+
           |
           v
      remote_addr

tcpdp probe connection diagram

                    server
+--------------------------+
|                          |
|                      +---+---+
|       <--------------| eth0  |----------->
|            interface +---+---+
|            /target     ^ |
|                        | |
|         tcpdp          | |
|        +--------+      | |
|        | dumper +------+ |
|        +--------+        |
+--------------------------+

log

key	description	tcpdp.log / dump.log (dumper type)	mode
ts	timestamp	tcpdp.log, hex, mysql, pg	proxy / probe / read
level	log level	tcpdp.log	proxy / probe
msg	log message	tcpdp.log	proxy / probe
error	error info	tcpdp.log	proxy / probe
caller	error caller	tcpdp.log	proxy / probe
conn_id	TCP connection ID by tcpdp	tcpdp.log, hex, mysql, pg	proxy / probe / read
conn_seq_num	TCP comunication sequence number by tcpdp	tcpdp.log, hex, mysql, pg	proxy
client_addr	client address	tcpdp.log, hex, mysql, pg	proxy
proxy_listen_addr	listen address	tcpdp.log, hex, mysql, pg	proxy
proxy_client_addr	proxy client address	hex, mysql, pg	proxy
remote_addr	remote address	tcpdp.log, hex, mysql, pg	proxy
direction	client to remote: -> / remote to client: <-	tcpdp.log, hex, mysql, pg	proxy
interface	probe target interface	tcpdp.log, hex, mysql, pg	probe
src_addr	src address	tcpdp.log, hex, mysql, pg	probe / read
dst_addr	dst address	tcpdp.log, hex, mysql, pg	probe / read
probe_target_addr	probe target address	tcpdp.log, hex, mysql, pg	probe
dump	dump data by hex.Dump	hex	proxy / probe / read
query	SQL query	mysql, pg	proxy / probe / read
username	username	mysql, pg	proxy / probe / read
database	database	mysql, pg	proxy / probe / read
seq_num	sequence number by MySQL	mysql	proxy / probe / read
command_id	command_id for MySQL	mysql	proxy / probe / read
message_type	message type for PostgreSQL	pg	proxy / probe / read

References

• https://github.com/jpillora/go-tcp-proxy
• https://github.com/dmmlabo/tcpserver_go