Remote Access Capabilities
Radare can be run locally, or it can be started as a server process which is controlled by a local radare2 process. This is possible because everything uses radare's IO subsystem which abstracts access to system(), cmd() and all basic IO operations so to work over a network.
Help for commands useful for remote access to radare:
[0x00405a04]> =? |Usage: =[:!+-=hH] [...] # radare remote command execution protocol | rap commands: | = list all open connections | =<[fd] cmd send output of local command to remote fd | =[fd] cmd exec cmd at remote 'fd' (last open is default one) | =! cmd run command via r_io_system | =+ [proto://]host add host (default=rap://, tcp://, udp://) | =-[fd] remove all hosts or host 'fd' | ==[fd] open remote session with host 'fd', 'q' to quit | =!= disable remote cmd mode | !=! enable remote cmd mode | rap server: | =:port listen on given port using rap protocol (o rap://9999) | =&:port start rap server in background | =:host:port cmd run 'cmd' command on remote server | http server: | =h port listen for http connections (r2 -qc=H /bin/ls) | =h- stop background webserver | =h* restart current webserver | =h& port start http server in background) | =H port launch browser and listen for http | =H& port launch browser and listen for http in background | gdbserver: | =g port file listen on 'port' debugging 'file' using gdbserver | =g! port file same as above, but debug protocol messages (like gdbserver --remote-debug)
You can learn radare2 remote capabilities by displaying the list of supported IO plugins:
A little example should make this clearer. A typical remote session might look like this:
At the remote host1:
$ radare2 rap://:1234
At the remote host2:
$ radare2 rap://:1234
$ radare2 -
; Add hosts
[0x004048c5]> =+ rap://<host1>:1234//bin/ls Connected to: <host1> at port 1234 waiting... ok [0x004048c5]> = 0 - rap://<host1>:1234//bin/ls
You can open remote files in debug mode (or using any IO plugin) specifying URI when adding hosts:
[0x004048c5]> =+ =+ rap://<host2>:1234/dbg:///bin/ls Connected to: <host2> at port 1234 waiting... ok 0 - rap://<host1>:1234//bin/ls 1 - rap://<host2>:1234/dbg:///bin/ls
To execute commands on host1:
[0x004048c5]> =0 px [0x004048c5]> = s 0x666
To open a session with host2:
[0x004048c5]> ==1 fd:6> pi 1 ... fd:6> q
To remove hosts (and close connections):
You can also redirect radare output to a TCP or UDP server (such as
nc -l). First, Add the server with '=+ tcp://' or '=+ udp://', then you can redirect the output of a command to be sent to the server:
[0x004048c5]> =+ tcp://<host>:<port>/ Connected to: <host> at port <port> 5 - tcp://<host>:<port>/ [0x004048c5]> =<5 cmd...
=<' command will send the output from the execution ofcmd` to the remote connection number N (or the last one used if no id specified).