# 서버 측 실행:
./udp2raw_amd64 -s -l0.0.0.0:4096 -r 127.0.0.1:7777    -k "passwd" --raw-mode faketcp -a

# 클라이언트 측 실행
./udp2raw_amd64 -c -l0.0.0.0:3333  -r44.55.66.77:4096  -k "passwd" --raw-mode faketcp -a

udp2raw-tunnel
git version:4623f878e0    build date:Nov  3 2024 23:15:46
repository: https://github.com/wangyu-/udp2raw-tunnel

usage:
    run as client : ./this_program -c -l local_listen_ip:local_port -r server_address:server_port  [options]
    run as server : ./this_program -s -l server_listen_ip:server_port -r remote_address:remote_port  [options]

common options,these options must be same on both side:
    --raw-mode            <string>        available values:faketcp(default),udp,icmp and easy-faketcp
    -k,--key              <string>        password to gen symetric key,default:"secret key"
    --cipher-mode         <string>        available values:aes128cfb,aes128cbc(default),xor,none
    --auth-mode           <string>        available values:hmac_sha1,md5(default),crc32,simple,none
    -a,--auto-rule                        auto add (and delete) iptables rule
    -g,--gen-rule                         generate iptables rule then exit,so that you can copy and
                                          add it manually.overrides -a
    --disable-anti-replay                 disable anti-replay,not suggested
    --fix-gro                             try to fix huge packet caused by GRO. this option is at an early stage.
                                          make sure client and server are at same version.
client options:
    --source-ip           <ip>            force source-ip for raw socket
    --source-port         <port>          force source-port for raw socket,tcp/udp only
                                          this option disables port changing while re-connecting
other options:
    --conf-file           <string>        read options from a configuration file instead of command line.
                                          check example.conf in repo for format
    --fifo                <string>        use a fifo(named pipe) for sending commands to the running program,
                                          check readme.md in repository for supported commands.
    --log-level           <number>        0:never    1:fatal   2:error   3:warn
                                          4:info (default)     5:debug   6:trace
    --log-position                        enable file name,function name,line number in log
    --disable-color                       disable log color
    --disable-bpf                         disable the kernel space filter,most time its not necessary
                                          unless you suspect there is a bug
    --dev                 <string>        bind raw socket to a device, not necessary but improves performance
    --sock-buf            <number>        buf size for socket,>=10 and <=10240,unit:kbyte,default:1024
    --force-sock-buf                      bypass system limitation while setting sock-buf
    --seq-mode            <number>        seq increase mode for faketcp:
                                          0:static header,do not increase seq and ack_seq
                                          1:increase seq for every packet,simply ack last seq
                                          2:increase seq randomly, about every 3 packets,simply ack last seq
                                          3:simulate an almost real seq/ack procedure(default)
                                          4:similiar to 3,but do not consider TCP Option Window_Scale,
                                          maybe useful when firewall doesnt support TCP Option
    --lower-level         <string>        send packets at OSI level 2, format:'if_name#dest_mac_adress'
                                          ie:'eth0#00:23:45:67:89:b9'.or try '--lower-level auto' to obtain
                                          the parameter automatically,specify it manually if 'auto' failed
    --wait-lock                           wait for xtables lock while invoking iptables, need iptables v1.4.20+
    --gen-add                             generate iptables rule and add it permanently,then exit.overrides -g
    --keep-rule                           monitor iptables and auto re-add if necessary.implys -a
    --hb-len              <number>        length of heart-beat packet, >=0 and <=1500
    --mtu-warn            <number>        mtu warning threshold, unit:byte, default:1375
    --clear                               clear any iptables rules added by this program.overrides everything
    --retry-on-error                      retry on error, allow to start udp2raw before network is initialized
    -h,--help                             print this help message

-s
# You can add comments like this
# Comments MUST occupy an entire line
# Or they will not work as expected
# Listen address
-l 0.0.0.0:4096
# Remote address
-r 127.0.0.1:7777
-a
-k passwd
--raw-mode faketcp

./udp2raw_amd64 --conf-file server.conf

iperf3 -c 10.222.2.1 -P40
iperf3 -c 10.222.2.1 -P40 -R