supernode(1) USER COMMANDS supernode(1)NAME
supernode - n2n supernode daemon
SYNOPSIS
supernode -l <port> [-v]
DESCRIPTION
N2N is a peer-to-peer VPN system. Supernode is a node introduction registry, broadcast conduit and packet relay node for the n2n system. On
startup supernode begins listening on the specified UDP port for node registrations, and other packets to route. The supernode can service
any number of communities and routes packets only between members of the same community. The supernode does not hold the community encryp-
tion key and so cannot snoop or inject packets into the community.
Supernode can service a number of n2n communities concurrently. Traffic does not cross between communities.
All logging goes to stdout.
OPTIONS -l <port>
listen on the given UDP port
-v use verbose logging
EXAMPLES
supernode -l 7654 -v
Start supernode listening on UDP port 7654 with verbose output.
RESTART
When suprenode restarts it loses all registration information from associated edge nodes. It can take up to five minutes for the edge nodes
to re-register and normal traffic flow to resume.
EXIT STATUS
supernode is a daemon and any exit is an error
AUTHOR
Luca Deri ( deri (at) ntop.org ), Richard Andrews ( andrews (at) ntop.org ), Don Bindner
SEE ALSO ifconfig(8)edge(8)revision 3679 Jan 3, 2009 supernode(1)
Check Out this Related Man Page
UDP(4P)UDP(4P)NAME
udp - Internet User Datagram Protocol
SYNOPSIS
#include <sys/socket.h>
#include <netinet/in.h>
s = socket(AF_INET, SOCK_DGRAM, 0);
DESCRIPTION
UDP is a simple, unreliable datagram protocol which is used to support the SOCK_DGRAM abstraction for the Internet protocol family. UDP
sockets are connectionless, and are normally used with the sendto and recvfrom calls, though the connect(2) call may also be used to fix
the destination for future packets (in which case the recv(2) or read(2) and send(2) or write(2) system calls may be used).
UDP address formats are identical to those used by TCP. In particular UDP provides a port identifier in addition to the normal Internet
address format. Note that the UDP port space is separate from the TCP port space (i.e. a UDP port may not be "connected" to a TCP port).
In addition broadcast packets may be sent (assuming the underlying network supports this) by using a reserved "broadcast address"; this
address is network interface dependent.
Options at the IP transport level may be used with UDP; see ip(4P).
DIAGNOSTICS
A socket operation may fail with one of the following errors returned:
[EISCONN] when trying to establish a connection on a socket which already has one, or when trying to send a datagram with the destina-
tion address specified and the socket is already connected;
[ENOTCONN] when trying to send a datagram, but no destination address is specified, and the socket hasn't been connected;
[ENOBUFS] when the system runs out of memory for an internal data structure;
[EADDRINUSE] when an attempt is made to create a socket with a port which has already been allocated;
[EADDRNOTAVAIL]
when an attempt is made to create a socket with a network address for which no network interface exists.
SEE ALSO getsockopt(2), recv(2), send(2), socket(2), intro(4N), inet(4F), ip(4P)4.2 Berkeley Distribution May 16, 1986 UDP(4P)
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