ip2socks

Support operating system

• OSX
• Linux

Get start

git clone https://github.com/FlowerWrong/ip2socks.git --recursive

# ubuntu vm
vagrant up --provider virtualbox
vagrant ssh

Compile with C++ 11 and cmake

# build ip2socks
cmake .
make


## start ip2socks
# OSX
sudo ./ip2socks --config=./scripts/config.darwin.example.yml

# linux
sudo ./ip2socks --config=./scripts/config.linux.example.yml

ip mode

• tun
• tap

dns mode

• tcp: just dns with port you set local_dns_port redirect to tcp, other flow will be try to send to remote via socks 5 udp tunnel
• udp: just dns with port you set local_dns_port redirect to udp, other flow will be send to remote via socks 5 udp tunnel

There are 5 ways to setup DNS query to remote

• use-vc in /etc/resolv.conf: Sets RES_USEVC in _res.options. This option forces the use of TCP for DNS resolutions.
• pdnsd
• lwip udp hooked, redirect to upstream tcp dns server via socks 5, config with remote_dns_server, you can just route your dns servers to tun or tap with route on OSX or ip route on Linux
• lwip udp hooked, redirect to upstream tcp dns server via socks 5, config with remote_dns_server, setup your dns to addr, eg 10.0.0.2
• lwip udp hooked, set you dns to remote, eg: 8.8.8.8

Library

• C++ 11
• lwip
• lwip-contrib
• libev
• libyaml

Know bugs

• too many CLOSE_WAIT to socks server, see netstat -an | grep CLOSE_WAIT | wc -l
• OSX receive data too often, eg: brew update, brew upgrade
• if ERR_QUIC_PROTOCOL_ERROR, go to chrome://flags/ disable quic
• ns_initparse Message too long bug
• (libev) select: Invalid argument
• tcp_raw_error is -14(ERR_RST): Connection reset.

TODO

• speed statistics
• DNS cache
• block rule support, just close it
• dnsmasq address=/test.com/127.0.0.1 support
• domain, domain_keyword, domain_suffix (ip_cidr, geoip) rule support
• timeout
• log
• OSX route batch insert
• lwip keep-alive support
• lwip SO_REUSEADDR support
• TCP fast open with Linux kernel > 3.7.0
• socks 5 client UDP relay
• FreeBSD support
• Android support
• iOS support
• ipv6 support