Initial import : make-boot-image.sh operationnal. Dumb mcastseed.

12 files changed, 1513 insertions, 0 deletions

diff --git a/mcastseed/AUTHORS b/mcastseed/AUTHORS
new file mode 100644
index 0000000..c338cf6
--- /dev/null
+++ b/mcastseed/AUTHORS
@@ -0,0 +1,3 @@
+Ludovic Pouzenc <ludovic@pouzenc.fr>
+Christian Beier <dontmind@freeshell.org>
+tmouse, http://cboard.cprogramming.com/showthread.php?t=67469
diff --git a/mcastseed/COPYING b/mcastseed/COPYING
new file mode 100644
index 0000000..d60c31a
--- /dev/null
+++ b/mcastseed/COPYING
@@ -0,0 +1,340 @@
+		    GNU GENERAL PUBLIC LICENSE
+		       Version 2, June 1991
+
+ Copyright (C) 1989, 1991 Free Software Foundation, Inc.
+     59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+			    Preamble
+
+  The licenses for most software are designed to take away your
+freedom to share and change it.  By contrast, the GNU General Public
+License is intended to guarantee your freedom to share and change free
+software--to make sure the software is free for all its users.  This
+General Public License applies to most of the Free Software
+Foundation's software and to any other program whose authors commit to
+using it.  (Some other Free Software Foundation software is covered by
+the GNU Library General Public License instead.)  You can apply it to
+your programs, too.
+
+  When we speak of free software, we are referring to freedom, not
+price.  Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+this service if you wish), that you receive source code or can get it
+if you want it, that you can change the software or use pieces of it
+in new free programs; and that you know you can do these things.
+
+  To protect your rights, we need to make restrictions that forbid
+anyone to deny you these rights or to ask you to surrender the rights.
+These restrictions translate to certain responsibilities for you if you
+distribute copies of the software, or if you modify it.
+
+  For example, if you distribute copies of such a program, whether
+gratis or for a fee, you must give the recipients all the rights that
+you have.  You must make sure that they, too, receive or can get the
+source code.  And you must show them these terms so they know their
+rights.
+
+  We protect your rights with two steps: (1) copyright the software, and
+(2) offer you this license which gives you legal permission to copy,
+distribute and/or modify the software.
+
+  Also, for each author's protection and ours, we want to make certain
+that everyone understands that there is no warranty for this free
+software.  If the software is modified by someone else and passed on, we
+want its recipients to know that what they have is not the original, so
+that any problems introduced by others will not reflect on the original
+authors' reputations.
+
+  Finally, any free program is threatened constantly by software
+patents.  We wish to avoid the danger that redistributors of a free
+program will individually obtain patent licenses, in effect making the
+program proprietary.  To prevent this, we have made it clear that any
+patent must be licensed for everyone's free use or not licensed at all.
+
+  The precise terms and conditions for copying, distribution and
+modification follow.
+
+		    GNU GENERAL PUBLIC LICENSE
+   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+
+  0. This License applies to any program or other work which contains
+a notice placed by the copyright holder saying it may be distributed
+under the terms of this General Public License.  The "Program", below,
+refers to any such program or work, and a "work based on the Program"
+means either the Program or any derivative work under copyright law:
+that is to say, a work containing the Program or a portion of it,
+either verbatim or with modifications and/or translated into another
+language.  (Hereinafter, translation is included without limitation in
+the term "modification".)  Each licensee is addressed as "you".
+
+Activities other than copying, distribution and modification are not
+covered by this License; they are outside its scope.  The act of
+running the Program is not restricted, and the output from the Program
+is covered only if its contents constitute a work based on the
+Program (independent of having been made by running the Program).
+Whether that is true depends on what the Program does.
+
+  1. You may copy and distribute verbatim copies of the Program's
+source code as you receive it, in any medium, provided that you
+conspicuously and appropriately publish on each copy an appropriate
+copyright notice and disclaimer of warranty; keep intact all the
+notices that refer to this License and to the absence of any warranty;
+and give any other recipients of the Program a copy of this License
+along with the Program.
+
+You may charge a fee for the physical act of transferring a copy, and
+you may at your option offer warranty protection in exchange for a fee.
+
+  2. You may modify your copy or copies of the Program or any portion
+of it, thus forming a work based on the Program, and copy and
+distribute such modifications or work under the terms of Section 1
+above, provided that you also meet all of these conditions:
+
+    a) You must cause the modified files to carry prominent notices
+    stating that you changed the files and the date of any change.
+
+    b) You must cause any work that you distribute or publish, that in
+    whole or in part contains or is derived from the Program or any
+    part thereof, to be licensed as a whole at no charge to all third
+    parties under the terms of this License.
+
+    c) If the modified program normally reads commands interactively
+    when run, you must cause it, when started running for such
+    interactive use in the most ordinary way, to print or display an
+    announcement including an appropriate copyright notice and a
+    notice that there is no warranty (or else, saying that you provide
+    a warranty) and that users may redistribute the program under
+    these conditions, and telling the user how to view a copy of this
+    License.  (Exception: if the Program itself is interactive but
+    does not normally print such an announcement, your work based on
+    the Program is not required to print an announcement.)
+
+These requirements apply to the modified work as a whole.  If
+identifiable sections of that work are not derived from the Program,
+and can be reasonably considered independent and separate works in
+themselves, then this License, and its terms, do not apply to those
+sections when you distribute them as separate works.  But when you
+distribute the same sections as part of a whole which is a work based
+on the Program, the distribution of the whole must be on the terms of
+this License, whose permissions for other licensees extend to the
+entire whole, and thus to each and every part regardless of who wrote it.
+
+Thus, it is not the intent of this section to claim rights or contest
+your rights to work written entirely by you; rather, the intent is to
+exercise the right to control the distribution of derivative or
+collective works based on the Program.
+
+In addition, mere aggregation of another work not based on the Program
+with the Program (or with a work based on the Program) on a volume of
+a storage or distribution medium does not bring the other work under
+the scope of this License.
+
+  3. You may copy and distribute the Program (or a work based on it,
+under Section 2) in object code or executable form under the terms of
+Sections 1 and 2 above provided that you also do one of the following:
+
+    a) Accompany it with the complete corresponding machine-readable
+    source code, which must be distributed under the terms of Sections
+    1 and 2 above on a medium customarily used for software interchange; or,
+
+    b) Accompany it with a written offer, valid for at least three
+    years, to give any third party, for a charge no more than your
+    cost of physically performing source distribution, a complete
+    machine-readable copy of the corresponding source code, to be
+    distributed under the terms of Sections 1 and 2 above on a medium
+    customarily used for software interchange; or,
+
+    c) Accompany it with the information you received as to the offer
+    to distribute corresponding source code.  (This alternative is
+    allowed only for noncommercial distribution and only if you
+    received the program in object code or executable form with such
+    an offer, in accord with Subsection b above.)
+
+The source code for a work means the preferred form of the work for
+making modifications to it.  For an executable work, complete source
+code means all the source code for all modules it contains, plus any
+associated interface definition files, plus the scripts used to
+control compilation and installation of the executable.  However, as a
+special exception, the source code distributed need not include
+anything that is normally distributed (in either source or binary
+form) with the major components (compiler, kernel, and so on) of the
+operating system on which the executable runs, unless that component
+itself accompanies the executable.
+
+If distribution of executable or object code is made by offering
+access to copy from a designated place, then offering equivalent
+access to copy the source code from the same place counts as
+distribution of the source code, even though third parties are not
+compelled to copy the source along with the object code.
+
+  4. You may not copy, modify, sublicense, or distribute the Program
+except as expressly provided under this License.  Any attempt
+otherwise to copy, modify, sublicense or distribute the Program is
+void, and will automatically terminate your rights under this License.
+However, parties who have received copies, or rights, from you under
+this License will not have their licenses terminated so long as such
+parties remain in full compliance.
+
+  5. You are not required to accept this License, since you have not
+signed it.  However, nothing else grants you permission to modify or
+distribute the Program or its derivative works.  These actions are
+prohibited by law if you do not accept this License.  Therefore, by
+modifying or distributing the Program (or any work based on the
+Program), you indicate your acceptance of this License to do so, and
+all its terms and conditions for copying, distributing or modifying
+the Program or works based on it.
+
+  6. Each time you redistribute the Program (or any work based on the
+Program), the recipient automatically receives a license from the
+original licensor to copy, distribute or modify the Program subject to
+these terms and conditions.  You may not impose any further
+restrictions on the recipients' exercise of the rights granted herein.
+You are not responsible for enforcing compliance by third parties to
+this License.
+
+  7. If, as a consequence of a court judgment or allegation of patent
+infringement or for any other reason (not limited to patent issues),
+conditions are imposed on you (whether by court order, agreement or
+otherwise) that contradict the conditions of this License, they do not
+excuse you from the conditions of this License.  If you cannot
+distribute so as to satisfy simultaneously your obligations under this
+License and any other pertinent obligations, then as a consequence you
+may not distribute the Program at all.  For example, if a patent
+license would not permit royalty-free redistribution of the Program by
+all those who receive copies directly or indirectly through you, then
+the only way you could satisfy both it and this License would be to
+refrain entirely from distribution of the Program.
+
+If any portion of this section is held invalid or unenforceable under
+any particular circumstance, the balance of the section is intended to
+apply and the section as a whole is intended to apply in other
+circumstances.
+
+It is not the purpose of this section to induce you to infringe any
+patents or other property right claims or to contest validity of any
+such claims; this section has the sole purpose of protecting the
+integrity of the free software distribution system, which is
+implemented by public license practices.  Many people have made
+generous contributions to the wide range of software distributed
+through that system in reliance on consistent application of that
+system; it is up to the author/donor to decide if he or she is willing
+to distribute software through any other system and a licensee cannot
+impose that choice.
+
+This section is intended to make thoroughly clear what is believed to
+be a consequence of the rest of this License.
+
+  8. If the distribution and/or use of the Program is restricted in
+certain countries either by patents or by copyrighted interfaces, the
+original copyright holder who places the Program under this License
+may add an explicit geographical distribution limitation excluding
+those countries, so that distribution is permitted only in or among
+countries not thus excluded.  In such case, this License incorporates
+the limitation as if written in the body of this License.
+
+  9. The Free Software Foundation may publish revised and/or new versions
+of the General Public License from time to time.  Such new versions will
+be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+Each version is given a distinguishing version number.  If the Program
+specifies a version number of this License which applies to it and "any
+later version", you have the option of following the terms and conditions
+either of that version or of any later version published by the Free
+Software Foundation.  If the Program does not specify a version number of
+this License, you may choose any version ever published by the Free Software
+Foundation.
+
+  10. If you wish to incorporate parts of the Program into other free
+programs whose distribution conditions are different, write to the author
+to ask for permission.  For software which is copyrighted by the Free
+Software Foundation, write to the Free Software Foundation; we sometimes
+make exceptions for this.  Our decision will be guided by the two goals
+of preserving the free status of all derivatives of our free software and
+of promoting the sharing and reuse of software generally.
+
+			    NO WARRANTY
+
+  11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
+FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.  EXCEPT WHEN
+OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
+PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
+OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  THE ENTIRE RISK AS
+TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU.  SHOULD THE
+PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
+REPAIR OR CORRECTION.
+
+  12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
+REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
+INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
+OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
+TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
+YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
+PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGES.
+
+		     END OF TERMS AND CONDITIONS
+
+	    How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+convey the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+
+Also add information on how to contact you by electronic and paper mail.
+
+If the program is interactive, make it output a short notice like this
+when it starts in an interactive mode:
+
+    Gnomovision version 69, Copyright (C) year  name of author
+    Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, the commands you use may
+be called something other than `show w' and `show c'; they could even be
+mouse-clicks or menu items--whatever suits your program.
+
+You should also get your employer (if you work as a programmer) or your
+school, if any, to sign a "copyright disclaimer" for the program, if
+necessary.  Here is a sample; alter the names:
+
+  Yoyodyne, Inc., hereby disclaims all copyright interest in the program
+  `Gnomovision' (which makes passes at compilers) written by James Hacker.
+
+  <signature of Ty Coon>, 1 April 1989
+  Ty Coon, President of Vice
+
+This General Public License does not permit incorporating your program into
+proprietary programs.  If your program is a subroutine library, you may
+consider it more useful to permit linking proprietary applications with the
+library.  If this is what you want to do, use the GNU Library General
+Public License instead of this License.
diff --git a/mcastseed/ChangeLog b/mcastseed/ChangeLog
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/mcastseed/ChangeLog
diff --git a/mcastseed/Makefile.am b/mcastseed/Makefile.am
new file mode 100644
index 0000000..0f59806
--- /dev/null
+++ b/mcastseed/Makefile.am
@@ -0,0 +1,7 @@
+## Process this file with automake to produce Makefile.in
+
+
+SUBDIRS = \
+	src
+
+
diff --git a/mcastseed/README b/mcastseed/README
new file mode 120000
index 0000000..42061c0
--- /dev/null
+++ b/mcastseed/README
@@ -0,0 +1 @@
+README.md
\ No newline at end of file
diff --git a/mcastseed/README.md b/mcastseed/README.md
new file mode 100644
index 0000000..98ddff0
--- /dev/null
+++ b/mcastseed/README.md
@@ -0,0 +1,9 @@
+
+This is a simple multicast file transfer with TCP back-chat.
+Greatly inspired from https://github.com/bk138/Multicast-Client-Server-Example
+
+Tested on GNU/Linux Debian 8, may usable under other OS without big efforts (patches appreciated).
+
+# Building
+To compile, use
+ autoreconf -fi && ./configure && make
diff --git a/mcastseed/configure.ac b/mcastseed/configure.ac
new file mode 100644
index 0000000..ad1db27
--- /dev/null
+++ b/mcastseed/configure.ac
@@ -0,0 +1,48 @@
+dnl Process this file with autoconf to produce a configure script.
+
+AC_INIT(mcastseeder, 0.1)
+
+# Args deprecated http://www.gnu.org/software/automake/manual/automake.html#Modernize-AM_005fINIT_005fAUTOMAKE-invocation
+AM_INIT_AUTOMAKE #(AC_PACKAGE_NAME, AC_PACKAGE_VERSION)
+AM_CONFIG_HEADER(config.h)
+AM_MAINTAINER_MODE
+
+
+
+AC_CANONICAL_HOST
+case $host_os in
+     darwin*)
+	HOST_IS_DARWIN="yes"
+	;;
+     *mingw32*)
+	HOST_IS_WINDOWS="yes"
+	;;
+     *)
+	HOST_IS_DARWIN="no"
+	HOST_IS_WINDOWS="no"
+	;;
+esac
+
+
+
+if test "$HOST_IS_WINDOWS" = "yes"; then
+        WSOCKLIB="-lws2_32"
+	AC_SUBST(WSOCKLIB)
+fi
+
+
+AM_CONDITIONAL(MINGW, [ test "$HOST_IS_WINDOWS" = "yes" ])
+AM_CONDITIONAL(DARWIN, [ test "$HOST_IS_DARWIN" = "yes" ])
+
+AC_ISC_POSIX
+AC_HEADER_STDC
+AC_PROG_CPP
+AC_PROG_CC
+AM_PROG_CC_STDC
+AM_PROG_CC_C_O
+
+
+AC_OUTPUT([
+Makefile
+src/Makefile
+])
diff --git a/mcastseed/src/Makefile.am b/mcastseed/src/Makefile.am
new file mode 100644
index 0000000..b28166c
--- /dev/null
+++ b/mcastseed/src/Makefile.am
@@ -0,0 +1,12 @@
+## Process this file with automake to produce Makefile.in
+
+AM_CFLAGS =\
+	 -Wall \
+	 -g
+
+bin_PROGRAMS = mcastseed mcastleech
+
+mcastseed_SOURCES = mcastseed.c msock.c
+mcastleech_SOURCES = mcastleech.c msock.c
+
+LDADD = @WSOCKLIB@
diff --git a/mcastseed/src/mcastleech.c b/mcastseed/src/mcastleech.c
new file mode 100644
index 0000000..d19bff9
--- /dev/null
+++ b/mcastseed/src/mcastleech.c
@@ -0,0 +1,227 @@
+/* client.c
+ * Greatly inspired from examples written by tmouse, July 2005
+ * http://cboard.cprogramming.com/showthread.php?t=67469
+ * Modified to run multi-platform by Christian Beier <dontmind@freeshell.org>.
+ */
+
+#ifndef __MINGW32__
+#include <unistd.h>
+#endif
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include "msock.h" 
+
+#define MULTICAST_RECV_BUF 10240
+#define MULTICAST_SO_RCVBUF 425984
+#define DEFAULT_MCAST_IP_STR "ff02::114"
+#define DEFAULT_PORT_STR "9000"
+
+/* Cmdline Arguments */
+char *prog_name = NULL;
+char *mcast_ip = NULL; 
+char *port = NULL;
+
+/* Sockets as global, used everywhere, even in die() */
+SOCKET mcast_sock = (SOCKET) -1; /* Multicast socket for receiving data */
+SOCKET ucast_sock = (SOCKET) -1; /* Unicast socket for give feedback to server */
+
+/* Buffer used for earch recvfrom() */
+char recvbuf[MULTICAST_RECV_BUF];
+
+/* Strings to print out representation of various states of the program */
+const char * const state_str[] = {
+	"exiting",
+	"wait_hello_and_connect_back",
+	"wait_start_and_start_job",
+	"receive_data",
+	"finalize_job",
+	"is_there_more_job"
+};
+
+/* Some boring funcs you didn't want to read now */
+void die(char* msg);
+void usage(char *msg);
+void arg_parse(int argc, char* argv[]);
+
+/* Parts of the "protocol", definitions are after main() */
+int wait_hello_and_connect_back();
+int wait_start_and_start_job();
+int receive_data();
+int finalize_job();
+int is_there_more_job();
+
+
+int main(int argc, char* argv[]) {
+	int state = 1; /* state of the "protocol" state machine */
+	int res;
+
+	arg_parse(argc, argv);
+
+	/* Finite state machine */
+	while ( state > 0 ) {
+		fprintf(stderr, "Now in %s state\n", state_str[state]);
+		switch ( state ) {
+			case 1: state = (wait_hello_and_connect_back() == 0)?2:1; break;
+			case 2: state = (wait_start_and_start_job() == 0)?2:3; break;
+			case 3: res = receive_data();
+							if (res==0) state = 4;
+							else if (res==1) state=3;
+							else state = -1;
+							break;
+			case 4: state = (finalize_job() == 0)?5:-2; break;
+			case 5: state = (is_there_more_job() == 0)?2:0; break;
+		}
+	}
+
+	if ( mcast_sock > 0 ) {
+		close(mcast_sock);
+	}
+
+	if ( state < 0 )
+		return -state;
+
+	return EXIT_SUCCESS;
+}
+
+
+int wait_hello_and_connect_back() {
+	/* Buffers for host and service strings after resolve */
+	char hbuf[NI_MAXHOST], sbuf[NI_MAXSERV];
+	/* Server address, filled by system after first recvfrom */
+	struct sockaddr_storage peer_addr;
+	socklen_t peer_addr_len;
+	/* Various needed variables */
+	ssize_t nread;
+	int res;
+
+	/* Setup mcast_sock */
+	if ( mcast_sock > 0 ) {
+		close(mcast_sock);
+		mcast_sock = 0;
+	}
+	mcast_sock = mcast_recv_socket(mcast_ip, port, MULTICAST_SO_RCVBUF);
+	if(mcast_sock < 0)
+			usage("Could not setup multicast socket. Wrong args given ?");
+
+	/* Wait for a single datagram from the server (for sync, no check on contain) */
+	peer_addr_len = sizeof(struct sockaddr_storage);
+	nread = recvfrom(mcast_sock, recvbuf, MULTICAST_RECV_BUF, 0, (struct sockaddr *) &peer_addr, &peer_addr_len);
+ 	if (nread < 0 ) {	
+		perror("recvfrom() failed");
+		return -1;	
+	}
+	/* Get peer informations as strings from peer_addr */
+	res = getnameinfo((struct sockaddr *) &peer_addr, peer_addr_len,
+			 hbuf, NI_MAXHOST, sbuf, NI_MAXSERV, NI_NUMERICSERV);
+	if ( res != 0 ) {
+		fprintf(stderr, "getnameinfo: %s\n", gai_strerror(res));
+		return -2;	
+	}
+	/* Connect back to the server, with reliable unicast */
+	if ( ucast_sock > 0 ) {
+		close(ucast_sock);
+	}
+	ucast_sock = ucast_client_socket(hbuf,port);
+	if(ucast_sock < 0) {
+		fprintf(stderr, "Could not setup unicast socket or connect to %s:%s\n", hbuf, port);
+		return -3;	
+	}
+
+	return 0;
+}
+
+int wait_start_and_start_job() {
+	ssize_t nread, nwrite;
+
+	/* Wait for a "start" datagram from the server */
+	nread = recvfrom(mcast_sock, recvbuf, MULTICAST_RECV_BUF, 0, NULL, 0);
+ 	if (nread < 0 ) {	
+		perror("recvfrom() failed");
+		return -1;	
+	}
+	if ( nread >= 5 && strncmp("start", recvbuf, 5) == 0 ) {
+
+		nwrite = write(ucast_sock, "ready", 5);
+		if ( nwrite < 0 ) {
+			fprintf(stderr, "write() failed\n");
+			return -2;
+		}
+		if (nwrite != 5) {
+			fprintf(stderr, "write() short\n");
+			return -3;
+		}
+
+		return 1;
+	}
+
+	return 0;	
+}
+
+int receive_data() {
+	ssize_t nread;
+	uint32_t seq;
+	uint16_t datalen;
+
+	/* Wait for a "dataN" datagram from the server */
+	nread = recvfrom(mcast_sock, recvbuf, MULTICAST_RECV_BUF, 0, NULL, 0);
+ 	if (nread < 0 ) {	
+		perror("recvfrom() failed");
+		return -1;	
+	}
+	if ( nread >= 10 && strncmp("data", recvbuf, 4) == 0 ) {
+		seq = ntohl( *( (uint32_t *) recvbuf+1 ) );
+		datalen = ntohs( *( (uint16_t *) recvbuf+4 ) );
+		//fprintf(stderr, "debug seq==%i, datalen==%hi\n", seq, datalen);
+		if ( nread != (10 + datalen) ) {
+			fprintf(stderr, "debug nread==%zi, (10 + datalen)==%i\n", nread, (10 + datalen));
+			//TODO nack ?
+			return -2;
+		}
+		fprintf(stdout, "data #%i, ", seq);
+		fwrite(recvbuf+10, datalen, 1, stdout);
+		fflush(stdout);
+		//TODO buffer zero copy, ack
+		return 1;
+	}
+
+	return 0;
+}
+
+int finalize_job() {
+	return 0;	
+}
+int is_there_more_job() {
+	return 1;
+}
+
+
+
+
+void die(char* msg) {
+	fprintf(stderr, "%s\n", msg);
+	if (mcast_sock > 0)
+		close(mcast_sock);
+	if (ucast_sock > 0)
+		close(ucast_sock);
+	exit(EXIT_FAILURE);
+}
+
+void usage(char *msg) {
+	char ubuf[256];
+	if ( msg != NULL )
+		fprintf(stderr, "%s\n", msg);
+	ubuf[0] = '\0';
+	snprintf(ubuf, 255, "Usage: %s [port] [mcast_ip]\n", prog_name);
+	die(ubuf);
+}
+
+void arg_parse(int argc, char* argv[]) {
+	prog_name = argv[0];
+	if ( argc > 3 )
+		usage("Too many arguments");	
+	port = (argc >= 2)?argv[1]:DEFAULT_PORT_STR;
+	mcast_ip = (argc >= 3)?argv[2]:DEFAULT_MCAST_IP_STR;
+}
+
diff --git a/mcastseed/src/mcastseed.c b/mcastseed/src/mcastseed.c
new file mode 100644
index 0000000..da73353
--- /dev/null
+++ b/mcastseed/src/mcastseed.c
@@ -0,0 +1,421 @@
+/* server.c
+ * Greatly inspired from examples written by tmouse, July 2005
+ * http://cboard.cprogramming.com/showthread.php?t=67469
+ * Modified to run multi-platform by Christian Beier <dontmind@freeshell.org>.
+ */
+
+#ifndef __MINGW32__
+#include <unistd.h> /* for usleep() */
+#endif
+#include <stdio.h>
+#include <stdlib.h>
+#include "msock.h"
+
+#define READ_BUF_LEN 256
+#define MAX_PENDING_CONNECTIONS 256
+#define MAX_CLIENTS 256
+#define DEFAULT_MCAST_IP_STR "ff02::114"
+#define DEFAULT_PORT_STR "9000"
+#define DEFAULT_MCAST_TTL 1
+
+/* Cmdline Arguments */
+char *prog_name = NULL;
+char *mcast_ip = NULL; 
+char *port = NULL;
+int mcast_ttl = 0;
+
+/* Sockets as global, used everywhere, even in die() */
+SOCKET mcast_sock = (SOCKET) -1; /* Multicast socket for sending data */
+SOCKET ucast_sock = (SOCKET) -1; /* Unicast socket for havee feedback from clients */
+
+/* Socket related data */
+struct addrinfo *mcast_addr = NULL;
+struct client {
+	SOCKET sock;
+	struct sockaddr addr;
+	int state;
+} clients[MAX_CLIENTS];
+int clients_next = 0;
+
+/* Buffer used for earch read() */
+char readbuf[READ_BUF_LEN];
+
+/* Strings to print out representation of various states of the program */
+const char * const state_str[] = {
+	"exiting",
+	"send_hello",
+	"accept_pending_clients_or_wait_a_bit",
+	"start_job",
+	"send_data",
+	"wait_all_finalize_job",
+	"is_there_more_job"
+};
+
+/* Some boring funcs you didn't want to read now */
+void die(char* msg);
+void usage(char *msg);
+void arg_parse(int argc, char* argv[]);
+void unsetup_sockets();
+void setup_sockets();
+
+/* Parts of the "protocol", definitions are after main() */
+int send_hello();
+int accept_pending_clients_or_wait_a_bit();
+int start_job();
+int send_data();
+int wait_all_finalize_job();
+int is_there_more_job();
+
+int main(int argc, char *argv[]) {
+	int state = 1; /* state of the "protocol" state machine */
+	int res;
+	arg_parse(argc, argv);
+	setup_sockets();
+
+	/* Finite state machine */
+	while ( state > 0 ) {
+		fprintf(stderr, "Now in %s state\n", state_str[state]);
+		switch ( state ) {
+			case 1: res = send_hello(); state = (res==0)?2:-1; break;
+			case 2: res = accept_pending_clients_or_wait_a_bit();
+							if (res==0) state = 2; // Some clients has just come in, try to get more
+							else if	(res==1) state = 1; // Nothing new. Keep accepting clients after another hello
+							else if (res==2) state = 3; // Wanted clients are accepted
+							else state = -2;
+							break;
+			case 3: res = start_job();
+							if (res==0) state = 3; // Keep trying to convince every client to start
+							else if (res==1) state = 4; // All clients have started the job pipe
+							else if	(res==2) state = 4; // There is dead clients but all alive are ready to go
+							else state = -3;
+							break;
+			case 4: res = send_data();
+							if (res==0) state = 4;
+							else if (res==1) state = 5; // All data sent
+							else state = -4;
+							break;
+			case 5: res = wait_all_finalize_job();
+							if (res==0) state = 5;
+							else if (res==1) state = 6;
+							else state = -5;
+			case 6: res = is_there_more_job();
+							if (res==0) state = 0;
+							else if (res==1) state = 3;
+							else state = -6;
+							break;
+		}
+	}
+
+	unsetup_sockets();
+
+	if ( state < 0 )
+	  return -state;
+
+	return EXIT_SUCCESS;
+}
+
+int send_hello() {
+	ssize_t nwrite;
+	const char *payload = "hello";
+	int paylen = strlen(payload);
+
+	nwrite = sendto(mcast_sock, payload, paylen, 0, mcast_addr->ai_addr, mcast_addr->ai_addrlen);
+	if ( nwrite < 0 ) {
+		perror("sendto() failed");
+		return -1;
+	}
+	if ( nwrite < paylen ) {
+		fprintf(stderr, "%s", "Short packet sent");
+	}
+
+	return 0;
+}
+
+int accept_pending_clients_or_wait_a_bit() {
+	struct timeval timeout;
+	fd_set readfds, exceptfds;
+	ssize_t nread;
+	int res;
+
+	FD_ZERO(&readfds);
+	FD_ZERO(&exceptfds);
+	FD_SET(0,&readfds); // Read from stdin. Will never work as is on Windows, requires threads and so.
+	FD_SET(ucast_sock,&readfds);
+	FD_SET(ucast_sock,&exceptfds);
+	timeout.tv_sec = 2;
+	timeout.tv_usec = 0;
+
+	res = select(ucast_sock+1, &readfds, NULL, &exceptfds, &timeout);
+	if ( res < 0 ) {
+		perror("select() failed");
+		return -1;
+	}
+
+	if ( res > 0 ) {
+		if (FD_ISSET(ucast_sock, &readfds)) {
+			//TODO : this assumes that the event is an accept() while ones could be send data there
+			if ( clients_next >= MAX_CLIENTS ) {
+				fprintf(stderr, "%s\n", "Bouncing client, MAX_CLIENTS reached");
+				close(accept(ucast_sock, NULL, 0));
+			} else {
+				socklen_t addrlen = sizeof(struct sockaddr);
+				clients[clients_next].sock = accept(ucast_sock, &(clients[clients_next].addr), &addrlen);
+				clients[clients_next].state = 0;
+				printf("Connected client on fd %i\n", clients[clients_next].sock);
+				clients_next++;
+			}
+		}
+		//TODO : drop this keybord read with accept(), this is not portable
+		if ( FD_ISSET(0, &readfds)) {
+			nread = read(0, readbuf, READ_BUF_LEN);
+			if ( nread <= 0 ) {
+				fprintf(stderr, "%s\n", "lost stdin");
+			}
+			// User wants to go now
+			return 2;
+		}
+		if (FD_ISSET(ucast_sock, &exceptfds)) {
+			fprintf(stderr, "%s\n", "unhandled except on ucast_sock");
+			return -2;
+		}
+	}
+	if (res == 0 ) {
+		// nothing happened before timeout
+		return 1;
+	}
+	return 0;
+}
+
+int start_job() {
+	struct timeval timeout;
+	fd_set readfds, exceptfds;
+	ssize_t nread, nwrite;
+	int all_ready, all_non_dead_ready;
+	int i, res;
+	SOCKET client_sock;
+	const char *payload = "start";
+	int paylen = strlen(payload);
+
+	nwrite = sendto(mcast_sock, payload, paylen, 0, mcast_addr->ai_addr, mcast_addr->ai_addrlen);
+	if ( nwrite < 0 ) {
+		perror("sendto() failed");
+		return -1;
+	}
+	if ( nwrite < paylen ) {
+		fprintf(stderr, "%s", "Short packet sent");
+	}
+
+	all_ready = 1;
+	all_non_dead_ready = 1;
+
+	FD_ZERO(&readfds);
+	FD_ZERO(&exceptfds);
+	for ( i=0; i<clients_next; i++) {
+		FD_SET(clients[i].sock,&readfds);
+		FD_SET(clients[i].sock,&exceptfds);
+	}
+	timeout.tv_sec = 2;
+	timeout.tv_usec = 0;
+	res = select(clients_next, &readfds, NULL, &exceptfds, &timeout);
+	if ( res < 0 ) {
+		perror("select() failed");
+		return -1;
+	}
+
+	if ( res > 0 ) {
+		for ( i=0; i<clients_next; i++) {
+			client_sock = clients[i].sock;
+			if (FD_ISSET(client_sock, &readfds)) {
+				printf("todo info from client %i\n", i);
+				nread = read(client_sock, readbuf, 5);
+				if ( nread <= 0 ) {
+					fprintf(stderr, "lost client %i\n", i);
+					clients[i].state = 2;
+				} else if ( nread < 5 ) {
+					fprintf(stderr, "short data from %i\n", i);
+					clients[i].state = 2;
+				} else if ( strncmp("ready", readbuf, 5) != 0 ) {
+					fprintf(stderr, "unexpected data from %i\n", i);
+					clients[i].state = 2;
+				} else {
+					// Received "ready" ack from client
+					clients[i].state = 1;
+				}
+			}
+			if (FD_ISSET(clients[i].sock, &exceptfds)) {
+				fprintf(stderr, "unhandled except on client %i\n", i);
+					clients[i].state = 2;
+			}
+			all_ready &= (clients[i].state == 1);
+			if ( clients[i].state != 2)
+				all_non_dead_ready &= (clients[i].state == 1);
+		}
+	}
+	// (res == 0 ) nothing happened before timeout
+
+	if ( all_ready )
+		return 1;
+	if ( all_non_dead_ready )
+		return 2;
+
+	return 0;
+}
+
+
+int send_data() {
+	ssize_t nwrite;
+	char buf[] = "dataXXXXXXJe suis à la plage.";
+	int paylen = strlen(buf)-10;
+	int seq = 1;
+
+	//FIXME use http://troydhanson.github.io/tpl/index.html
+	*( (uint32_t *) buf+1 ) = htonl(seq);
+	*( (uint16_t *) buf+4 ) = htons(paylen);
+
+	nwrite = sendto(mcast_sock, buf, 10+paylen, 0, mcast_addr->ai_addr, mcast_addr->ai_addrlen);
+	if ( nwrite < 0 ) {
+		perror("sendto() failed");
+		return -1;
+	}
+	if ( nwrite < paylen ) {
+		fprintf(stderr, "%s", "Short packet sent");
+	}
+
+	return 1;	
+}
+
+
+int wait_all_finalize_job() {
+	struct timeval timeout;
+	fd_set readfds, exceptfds;
+	ssize_t nread, nwrite;
+	int all_non_dead_done;
+	int i, res;
+	SOCKET client_sock;
+	const char *payload = "final";
+	int paylen = strlen(payload);
+
+	nwrite = sendto(mcast_sock, payload, paylen, 0, mcast_addr->ai_addr, mcast_addr->ai_addrlen);
+	if ( nwrite < 0 ) {
+		perror("sendto() failed");
+		return -1;
+	}
+	if ( nwrite < paylen ) {
+		fprintf(stderr, "%s", "Short packet sent");
+	}
+
+	all_non_dead_done = 1;
+
+	FD_ZERO(&readfds);
+	FD_ZERO(&exceptfds);
+	for ( i=0; i<clients_next; i++) {
+		FD_SET(clients[i].sock,&readfds);
+		FD_SET(clients[i].sock,&exceptfds);
+	}
+	timeout.tv_sec = 2;
+	timeout.tv_usec = 0;
+	res = select(clients_next, &readfds, NULL, &exceptfds, &timeout);
+	if ( res < 0 ) {
+		perror("select() failed");
+		return -1;
+	}
+
+	if ( res > 0 ) {
+		for ( i=0; i<clients_next; i++) {
+			client_sock = clients[i].sock;
+			if (FD_ISSET(client_sock, &readfds)) {
+				printf("todo info from client %i\n", i);
+				nread = read(client_sock, readbuf, 5);
+				if ( nread <= 0 ) {
+					fprintf(stderr, "lost client %i\n", i);
+					clients[i].state = 2;
+				} else if ( nread < 5 ) {
+					fprintf(stderr, "short data from %i\n", i);
+					clients[i].state = 2;
+				} else if ( strncmp("done.", readbuf, 5) != 0 ) {
+					fprintf(stderr, "unexpected data from %i\n", i);
+					clients[i].state = 2;
+				} else {
+					// Received "done." ack from client
+					clients[i].state = 3;
+				}
+			}
+			if (FD_ISSET(clients[i].sock, &exceptfds)) {
+				fprintf(stderr, "unhandled except on client %i\n", i);
+					clients[i].state = 2;
+			}
+			if ( clients[i].state != 2)
+				all_non_dead_done &= (clients[i].state == 3);
+		}
+	}
+	// (res == 0 ) nothing happened before timeout
+
+	if ( all_non_dead_done )
+		return 1;
+
+	return 0;
+}
+
+
+int is_there_more_job() {
+	return 0;
+}
+
+
+void die(char* msg) {
+	fprintf(stderr, "%s\n", msg);
+	if (mcast_sock > 0)
+		close(mcast_sock);
+	if (ucast_sock > 0)
+		close(ucast_sock);
+	exit(EXIT_FAILURE);
+}
+
+void usage(char *msg) {
+	char ubuf[256];
+	if ( msg != NULL )
+		fprintf(stderr, "%s\n", msg);
+	ubuf[0] = '\0';
+	snprintf(ubuf, 255, "Usage: %s [port] [mcast_ip] [mcast_ttl]\n", prog_name);
+	die(ubuf);
+}
+
+void arg_parse(int argc, char* argv[]) {
+	prog_name = argv[0];
+	if ( argc > 3 )
+		usage("Too many arguments");	
+	port = (argc >= 2)?argv[1]:DEFAULT_PORT_STR;
+	mcast_ip = (argc >= 3)?argv[2]:DEFAULT_MCAST_IP_STR;
+	mcast_ttl = (argc >= 4)?atoi(argv[3]):DEFAULT_MCAST_TTL;
+	if ( mcast_ttl < 1 || mcast_ttl > 64 )
+		mcast_ttl = 1;
+}
+
+void unsetup_sockets() {
+	if ( ucast_sock > 0 ) {
+		close(ucast_sock);
+		ucast_sock = 0;
+	}
+
+	if ( mcast_sock > 0 ) {
+		close(mcast_sock);
+		mcast_sock = 0;
+		if ( mcast_addr ) {
+			freeaddrinfo(mcast_addr);
+			mcast_addr = 0;
+		}
+	}
+}
+
+void setup_sockets() {
+	/* Setup ucast_sock */
+	ucast_sock = ucast_server_socket(port, MAX_PENDING_CONNECTIONS);
+	if(ucast_sock < 0)
+			usage("Could not setup unicast socket. Wrong args given ?");
+
+	/* Setup mcast_sock */
+	mcast_sock = mcast_send_socket(mcast_ip, port, mcast_ttl, &mcast_addr);
+	if(mcast_sock < 0)
+			usage("Could not setup multicast socket. Wrong args given ?");
+}
+
diff --git a/mcastseed/src/msock.c b/mcastseed/src/msock.c
new file mode 100644
index 0000000..8274710
--- /dev/null
+++ b/mcastseed/src/msock.c
@@ -0,0 +1,371 @@
+/*
+  msock.c - multicast socket creation routines
+
+  (C) 2016 Christian Beier <dontmind@sdf.org>
+
+*/
+
+#ifndef __MINGW32__
+#include <unistd.h>
+#endif
+#include <stdio.h>
+#include <stdlib.h>
+#include <errno.h>
+
+#include "msock.h"
+
+SOCKET mcast_send_socket(char* multicastIP, char* multicastPort,  int multicastTTL, struct addrinfo **multicastAddr) {
+
+    SOCKET sock;
+    struct addrinfo hints = { 0 };    /* Hints for name lookup */
+    
+    
+#ifdef WIN32
+    WSADATA trash;
+    if(WSAStartup(MAKEWORD(2,0),&trash)!=0)
+	DieWithError("Couldn't init Windows Sockets\n");
+#endif
+
+    
+    /*
+      Resolve destination address for multicast datagrams 
+    */
+    hints.ai_family   = PF_UNSPEC;
+    hints.ai_socktype = SOCK_DGRAM;
+    hints.ai_flags    = AI_NUMERICHOST;
+    int status;
+    if ((status = getaddrinfo(multicastIP, multicastPort, &hints, multicastAddr)) != 0 )
+	{
+	    fprintf(stderr, "getaddrinfo: %s\n", gai_strerror(status));
+	    return -1;
+	}
+
+   
+
+    /* 
+       Create socket for sending multicast datagrams 
+    */
+    if ( (sock = socket((*multicastAddr)->ai_family, (*multicastAddr)->ai_socktype, 0)) < 0 ) {
+	perror("socket() failed");
+	freeaddrinfo(*multicastAddr);
+	return -1;
+    }
+
+    /* 
+       Set TTL of multicast packet 
+    */
+    if ( setsockopt(sock,
+		    (*multicastAddr)->ai_family == PF_INET6 ? IPPROTO_IPV6        : IPPROTO_IP,
+		    (*multicastAddr)->ai_family == PF_INET6 ? IPV6_MULTICAST_HOPS : IP_MULTICAST_TTL,
+		    (char*) &multicastTTL, sizeof(multicastTTL)) != 0 ) {
+	perror("setsockopt() failed");
+	freeaddrinfo(*multicastAddr);
+	return -1;
+    }
+    
+    
+    /* 
+       set the sending interface 
+    */
+    if((*multicastAddr)->ai_family == PF_INET) {
+	in_addr_t iface = INADDR_ANY; /* well, yeah, any */
+	if(setsockopt (sock, 
+		       IPPROTO_IP,
+		       IP_MULTICAST_IF,
+		       (char*)&iface, sizeof(iface)) != 0) { 
+	    perror("interface setsockopt() sending interface");
+	    freeaddrinfo(*multicastAddr);
+	    return -1;
+	}
+
+    }
+    if((*multicastAddr)->ai_family == PF_INET6) {
+	unsigned int ifindex = 0; /* 0 means 'default interface'*/
+	if(setsockopt (sock, 
+		       IPPROTO_IPV6,
+		       IPV6_MULTICAST_IF,
+		       (char*)&ifindex, sizeof(ifindex)) != 0) { 
+	    perror("interface setsockopt() sending interface");
+	    freeaddrinfo(*multicastAddr);
+	    return -1;
+	}   
+	 
+    }
+
+     
+    return sock;
+
+}
+
+
+
+SOCKET mcast_recv_socket(char* multicastIP, char* multicastPort, int multicastRecvBufSize) {
+
+    SOCKET sock;
+    struct addrinfo   hints  = { 0 };    /* Hints for name lookup */
+    struct addrinfo*  localAddr = 0;         /* Local address to bind to */
+    struct addrinfo*  multicastAddr = 0;     /* Multicast Address */
+    int yes=1;
+  
+#ifdef WIN32
+    WSADATA trash;
+    if(WSAStartup(MAKEWORD(2,0),&trash)!=0)
+	DieWithError("Couldn't init Windows Sockets\n");
+#endif
+
+    
+    /* Resolve the multicast group address */
+    hints.ai_family = PF_UNSPEC;
+    hints.ai_flags  = AI_NUMERICHOST;
+    int status;
+    if ((status = getaddrinfo(multicastIP, NULL, &hints, &multicastAddr)) != 0) {
+	    fprintf(stderr, "getaddrinfo: %s\n", gai_strerror(status));
+	    goto error;
+    }
+    
+   
+    /* 
+       Get a local address with the same family (IPv4 or IPv6) as our multicast group
+       This is for receiving on a certain port.
+    */
+    hints.ai_family   = multicastAddr->ai_family;
+    hints.ai_socktype = SOCK_DGRAM;
+    hints.ai_flags    = AI_PASSIVE; /* Return an address we can bind to */
+    if ( getaddrinfo(NULL, multicastPort, &hints, &localAddr) != 0 ) {
+	fprintf(stderr, "getaddrinfo: %s\n", gai_strerror(status));
+	goto error;
+    }
+  
+
+    /* Create socket for receiving datagrams */
+    if ( (sock = socket(localAddr->ai_family, localAddr->ai_socktype, 0)) < 0 ) {
+	perror("socket() failed");
+	goto error;
+    }
+    
+    
+   
+    /*
+     * Enable SO_REUSEADDR to allow multiple instances of this
+     * application to receive copies of the multicast datagrams.
+     */
+    if (setsockopt(sock,SOL_SOCKET,SO_REUSEADDR,(char*)&yes,sizeof(int)) == -1) {
+	perror("setsockopt");
+	goto error;
+    }
+  
+    /* Bind the local address to the multicast port */
+    if ( bind(sock, localAddr->ai_addr, localAddr->ai_addrlen) != 0 ) {
+	perror("bind() failed");
+	goto error;
+    }
+
+    /* get/set socket receive buffer */
+    int optval=0;
+    socklen_t optval_len = sizeof(optval);
+    int dfltrcvbuf;
+    if(getsockopt(sock, SOL_SOCKET, SO_RCVBUF,(char*)&optval, &optval_len) !=0) {
+	perror("getsockopt");
+	goto error;
+    }
+    dfltrcvbuf = optval;
+    optval = multicastRecvBufSize;
+    if(setsockopt(sock,SOL_SOCKET,SO_RCVBUF,(char*)&optval,sizeof(optval)) != 0) {
+	perror("setsockopt");
+	goto error;
+    }
+    if(getsockopt(sock, SOL_SOCKET, SO_RCVBUF,(char*)&optval, &optval_len) != 0) {
+	perror("getsockopt");
+	goto error;
+    }
+    printf("tried to set socket receive buffer from %d to %d, got %d\n",
+	   dfltrcvbuf, multicastRecvBufSize, optval);
+
+  
+    
+    
+    /* Join the multicast group. We do this seperately depending on whether we
+     * are using IPv4 or IPv6. 
+     */
+    if ( multicastAddr->ai_family  == PF_INET &&  
+	 multicastAddr->ai_addrlen == sizeof(struct sockaddr_in) ) /* IPv4 */
+	{
+	    struct ip_mreq multicastRequest;  /* Multicast address join structure */
+
+	    /* Specify the multicast group */
+	    memcpy(&multicastRequest.imr_multiaddr,
+		   &((struct sockaddr_in*)(multicastAddr->ai_addr))->sin_addr,
+		   sizeof(multicastRequest.imr_multiaddr));
+
+	    /* Accept multicast from any interface */
+	    multicastRequest.imr_interface.s_addr = htonl(INADDR_ANY);
+
+	    /* Join the multicast address */
+	    if ( setsockopt(sock, IPPROTO_IP, IP_ADD_MEMBERSHIP, (char*) &multicastRequest, sizeof(multicastRequest)) != 0 ) {
+		perror("setsockopt() failed");
+		goto error;
+	    }
+	}
+    else if ( multicastAddr->ai_family  == PF_INET6 &&
+	      multicastAddr->ai_addrlen == sizeof(struct sockaddr_in6) ) /* IPv6 */
+	{
+	    struct ipv6_mreq multicastRequest;  /* Multicast address join structure */
+
+	    /* Specify the multicast group */
+	    memcpy(&multicastRequest.ipv6mr_multiaddr,
+		   &((struct sockaddr_in6*)(multicastAddr->ai_addr))->sin6_addr,
+		   sizeof(multicastRequest.ipv6mr_multiaddr));
+
+	    /* Accept multicast from any interface */
+	    multicastRequest.ipv6mr_interface = 0;
+
+	    /* Join the multicast address */
+	    if ( setsockopt(sock, IPPROTO_IPV6, IPV6_ADD_MEMBERSHIP, (char*) &multicastRequest, sizeof(multicastRequest)) != 0 ) {
+		perror("setsockopt() failed");
+		goto error;
+	    }
+	}
+    else {
+	perror("Neither IPv4 or IPv6"); 
+  	goto error;
+    }
+
+
+    
+    if(localAddr)
+	freeaddrinfo(localAddr);
+    if(multicastAddr)
+	freeaddrinfo(multicastAddr);
+    
+    return sock;
+
+ error:
+    if(localAddr)
+	freeaddrinfo(localAddr);
+    if(multicastAddr)
+	freeaddrinfo(multicastAddr);
+
+    return -1;
+}
+
+SOCKET ucast_client_socket(char* serverIP, char* serverPort) {
+
+	SOCKET sock;
+	struct addrinfo *serverAddr;
+	struct addrinfo hints = { 0 };    /* Hints for name lookup */
+
+
+#ifdef WIN32
+	WSADATA trash;
+	if(WSAStartup(MAKEWORD(2,0),&trash)!=0)
+		DieWithError("Couldn't init Windows Sockets\n");
+#endif
+
+
+	/*
+		 Resolve destination address
+	 */
+	hints.ai_family   = PF_UNSPEC;
+	hints.ai_socktype = SOCK_STREAM;
+	hints.ai_flags    = AI_NUMERICHOST;
+	int status;
+	if ((status = getaddrinfo(serverIP, serverPort, &hints, &serverAddr)) != 0 )
+	{
+		fprintf(stderr, "getaddrinfo: %s\n", gai_strerror(status));
+		return -1;
+	}
+
+	/* 
+		 Create socket
+	 */
+	if ( (sock = socket(serverAddr->ai_family, serverAddr->ai_socktype, 0)) < 0 ) {
+		perror("socket() failed");
+		freeaddrinfo(serverAddr);
+		return -1;
+	}
+
+	/* 
+		 Connect it to the remote server
+	 */
+	if ( connect(sock, serverAddr->ai_addr, serverAddr->ai_addrlen) < 0 ) {
+		perror("connect() failed");
+		close(sock);
+		freeaddrinfo(serverAddr);
+		return -1;
+	}
+
+	freeaddrinfo(serverAddr);
+	return sock;
+}
+
+SOCKET ucast_server_socket(char* serverPort, int maxPendingConnections) {
+
+	SOCKET sock;
+	struct addrinfo *serverAddr;
+	struct addrinfo hints = { 0 };    /* Hints for name lookup */
+
+
+#ifdef WIN32
+	WSADATA trash;
+	if(WSAStartup(MAKEWORD(2,0),&trash)!=0)
+		DieWithError("Couldn't init Windows Sockets\n");
+#endif
+
+
+	/*
+		 Prepare an addrinfo struct for a local socket
+	 */
+	hints.ai_family   = PF_INET6;
+	hints.ai_socktype = SOCK_STREAM;
+	hints.ai_flags    = AI_PASSIVE;
+	int status;
+	if ((status = getaddrinfo(NULL, serverPort, &hints, &serverAddr)) != 0 )
+	{
+		fprintf(stderr, "getaddrinfo: %s\n", gai_strerror(status));
+		return -1;
+	}
+	/* 
+		 Create socket
+	 */
+	if ( (sock = socket(serverAddr->ai_family, serverAddr->ai_socktype, serverAddr->ai_protocol)) < 0 ) {
+		perror("socket() failed");
+		freeaddrinfo(serverAddr);
+		return -1;
+	}
+
+	/*
+	   Accepts also IPv4 traffic if the socket is INET6
+	 */
+	if(serverAddr->ai_family == PF_INET6) {
+		unsigned int no = 0;
+		if(setsockopt (sock, 
+					IPPROTO_IPV6,
+					IPV6_V6ONLY,
+					(char*)&no, sizeof(no)) != 0) { 
+			perror("setsockopt() !IPV6_V6ONLY failed");
+			freeaddrinfo(serverAddr);
+			return -1;
+		}   
+	}
+	
+	/* 
+		 Bind socket to local address/port
+	 */
+	if ( bind(sock, serverAddr->ai_addr, serverAddr->ai_addrlen) < 0 ) {
+		perror("bind() failed");
+		close(sock);
+		freeaddrinfo(serverAddr);
+		return -1;
+	}
+
+	freeaddrinfo(serverAddr);
+	/*
+	   Start listening incoming connections
+	 */
+	if ( listen(sock, maxPendingConnections) < 0 ) {
+		perror("listen() failed");
+		close(sock);
+	}
+
+	return sock;
+}
diff --git a/mcastseed/src/msock.h b/mcastseed/src/msock.h
new file mode 100644
index 0000000..07e1fad
--- /dev/null
+++ b/mcastseed/src/msock.h
@@ -0,0 +1,74 @@
+/*
+  msock.h - multicast socket creation routines
+
+  (C) 2016 Christian Beier <dontmind@sdf.org>
+
+*/
+
+
+#ifndef MSOCK_H
+#define MSOCK_H
+
+/* this is for windows compat */
+#define SOCKET int
+
+#ifdef __MINGW32__ 
+#undef SOCKET
+#undef socklen_t 
+#define WINVER 0x0501 
+#include <ws2tcpip.h> 
+#define EWOULDBLOCK WSAEWOULDBLOCK
+#define close closesocket
+#define socklen_t int
+typedef unsigned int in_addr_t;
+#else
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <sys/un.h>
+#include <netinet/tcp.h>
+#include <arpa/inet.h>
+#include <netdb.h>
+#endif
+
+/* Define IPV6_ADD_MEMBERSHIP for FreeBSD and Mac OS X */
+#ifndef IPV6_ADD_MEMBERSHIP
+#define IPV6_ADD_MEMBERSHIP IPV6_JOIN_GROUP
+#endif
+
+
+
+/**
+   Creates a socket suitable for sending multicast datagrams via sendto().
+
+   On success, a socket is returned and multicastAddr set with the right info for sendto() calls.
+   On error, -1 is returned.
+*/
+SOCKET mcast_send_socket(char* multicastIP, char* multicastPort,  int multicastTTL, struct addrinfo **multicastAddr);
+
+/**
+   Creates a socket suitable for receiving multicast datagrams via recvfrom(). Also sets socket recv buffer.
+   
+   On success, returns socket.
+   On fail, returns -1.
+ */
+SOCKET mcast_recv_socket(char* multicastIP, char* multicastPort, int multicastRecvBufSize);
+
+/**
+   Creates a TCP socket that connects to serverIP:serverPort. 
+   Meant to give feedback to a mcast sender.
+  
+   On success, returns socket.
+   On error, -1 is returned.
+ */
+SOCKET ucast_client_socket(char* serverIP, char* serverPort);
+
+/**
+   Creates a TCP socket that binds locally serverPort. 
+   Meant to receive feedback to a mcast sender.
+  
+   On success, returns socket.
+   On error, -1 is returned.
+ */
+SOCKET ucast_server_socket(char* serverPort, int maxPendingConnections);
+
+#endif