Added support for Data Channels

Added a first integration of Data Channels (strings only for now)
Modified Echo Test and Video Call demos to include Data Channels
Updated documentation and FAQ
General bug fixing here and there

Makefile

@@ -1,13 +1,13 @@
 CC = gcc
 STUFF = $(shell pkg-config --cflags glib-2.0 nice libmicrohttpd jansson libssl libcrypto sofia-sip-ua ini_config) -ldl -D_GNU_SOURCE $(HAVE_PORTRANGE)
-LIBS = $(shell pkg-config --libs glib-2.0 nice libmicrohttpd jansson libssl libcrypto sofia-sip-ua ini_config) -ldl -lsrtp -D_GNU_SOURCE $(HAVE_PORTRANGE)
+LIBS = $(shell pkg-config --libs glib-2.0 nice libmicrohttpd jansson libssl libcrypto sofia-sip-ua ini_config) -ldl -lsrtp -lusrsctp -D_GNU_SOURCE $(HAVE_PORTRANGE)
 OPTS = -Wall -Wstrict-prototypes -Wmissing-prototypes -Wmissing-declarations -Wunused -Wno-format-security #-Werror #-O2
-GDB = -g -ggdb -rdynamic #-gstabs
-OBJS=janus.o cmdline.o config.o apierror.o rtcp.o dtls.o ice.o sdp.o utils.o
+GDB = -fstack-protector-all -g -ggdb -rdynamic #-gstabs
+OBJS=janus.o cmdline.o config.o apierror.o rtcp.o dtls.o sctp.o ice.o sdp.o utils.o
 
 all: cmdline janus plugins
 
-.PHONY: plugins docs
+.PHONY: plugins docs sctptest
 
 plugins:
 ifndef INSTALLSH
@@ -19,7 +19,10 @@ docs:
  $(MAKE) -C docs
 
 cmdline:
- gengetopt --set-package="janus" --set-version="0.0.2" < janus.ggo
+ gengetopt --set-package="janus" --set-version="0.0.3" < janus.ggo
+
+sctptest:
+ $(MAKE) -C sctptest
 
 %.o: %.c
  $(CC) $(STUFF) -fPIC $(GDB) -c $< -o $@ $(OPTS)

README.md

@@ -24,6 +24,7 @@ To install it, you'll need to satisfy the following dependencies:
 * [OpenSSL](https://www.openssl.org/) (at least v1.0.1e)
 * [libsrtp](https://srtp.sourceforge.net/srtp.html)
 * [Sofia-SIP](https://sofia-sip.sourceforge.net/)
+* [usrsctp](https://code.google.com/p/sctp-refimpl/)
 
 A couple of plugins depend on a few more libraries:
 
@@ -55,6 +56,19 @@ On Ubuntu or Debian, it would require something like this:
 on Ubuntu or Debian, unless you're using a recent version (e.g., Ubuntu
 14.04 LTS). In that case, you'll have to [install it manually](https://www.opus-codec.org).
 
+For what concerns usrsctp, which is needed for Data Channels support, it
+is usually not available in repositories, so you'll have to install it
+manually. It is a pretty easy and standard process:
+
+ svn co https://sctp-refimpl.googlecode.com/svn/trunk/KERN/usrsctp usrsctp
+ cd usrsctp
+ ./bootstrap
+ ./configure --prefix=/usr && make && sudo make install
+ echo
+
+* *Note:* you may need to pass --libdir=/usr/lib64 to the configure
+script if you're installing on a x86_64 distribution.
+
 Should you be interested in building the gateway documentation as well,
 you'll need an additional component installed too:
 
@@ -79,7 +93,10 @@ to start the whole compilation process. The script will try to check
 whether you have all the dependencies installed, and then issue a 'make'
 for you to start compiling. If Doxygen and graphviz are available, it
 will also build the documentation for you as well in the docs/html
-subfolder.
+subfolder. If you prefer not to build the documentation (or not to
+build it again and again every time you compile!) use the 'nodocs' option:
+
+ sh install.sh nodocs
 
 
 ##Configure and start
@@ -92,7 +109,7 @@ or on the command line:
 
  ./janus --help
 
- janus 0.0.2
+ janus 0.0.3
 
  Usage: janus [OPTIONS]...
 

docs/janus-doxygen.cfg

@@ -32,7 +32,7 @@ PROJECT_NAME = "Janus"
 # This could be handy for archiving the generated documentation or
 # if some version control system is used.
 
-PROJECT_NUMBER = 0.0.2
+PROJECT_NUMBER = 0.0.3
 
 # Using the PROJECT_BRIEF tag one can provide an optional one line description
 # for a project that appears at the top of each page and should give viewer