This is a simple command line tool implementing the WebRTC datachannels using a kernel SCTP stack. Therefore there is no support for DTLS and ICE. This tool runs on FreeBSD and Mac OS X (by using the SCTP NKE). Neither Linux nor Solaris is supported, since these implementations lack support of RFC6525 and RFC7496.
It implements [DataChannel] (https://tools.ietf.org/html/draft-ietf-rtcweb-data-channel) and DECP. Both Internet Drafts are in the RFC Editors queue. Support for I-DATA is being developed.
cc -g -Wall -std=c99 -pedantic -o dctt -pthread dctt.c
cc -g -Wall -std=c99 -pedantic -o dctt -lsctp dctt.c
Currently only SCTP/IPV4 is supported. Neither SCTP/IPV6 nor UDP encapsulation as specified in RFC6951 is currently supported. You can run the tool as an SCTP server by using
./dctt local_port
The server will bind to all available IPv4 addresses and local_port.
For using it as a client issue
./dctt remote_addr remote_port [local_port]
The client will bind to all local addresses and an ephemeral port or local_port if set and initiate an
SCTP association towards the IPv4 address remote_addr and the port remote_port.