set either of these variables to "nc". Input and output can be
switched independently.
+CONFIG_NETCONSOLE_BUFFER_SIZE - Override the default buffer size
+
We use an environment variable 'ncip' to set the IP address and the
port of the destination. The format is <ip_addr>:<port>. If <port> is
omitted, the value of 6666 is used. If the env var doesn't exist, the
broadcast address and port 6666 are used. If it is set to an IP
address of 0 (or 0.0.0.0) then no messages are sent to the network.
+The source / listening port can be configured separately by setting
+the 'ncinport' environment variable and the destination port can be
+configured by setting the 'ncoutport' environment variable.
For example, if your server IP is 192.168.1.1, you could use:
It turns out that 'netcat' cannot be used to listen to broadcast
packets. We developed our own tool 'ncb' (see tools directory) that
listens to broadcast packets on a given port and dumps them to the
-standard output. use it as follows:
-
-+++++++++++++++++++++++++++++++++++++++++++
-#! /bin/bash
-
-[ $# = 1 ] || { echo "Usage: $0 target_ip" >&2 ; exit 1 ; }
-TARGET_IP=$1
-
-stty icanon echo intr ^T
-./ncb &
-nc -u ${TARGET_IP} 6666
-stty icanon echo intr ^C
-kill 0
-+++++++++++++++++++++++++++++++++++++++++++
-
-Again, this script takes exactly one argument, which is interpreted
-as the target IP address (or host name, assuming DNS is working). The
-script can be interrupted by pressing ^T (CTRL-T).
-
-The 'ncb' tool can be found in the tools directory; it will be built
-when compiling for a board which has CONFIG_NETCONSOLE defined.
+standard output. It will be built when compiling for a board which
+has CONFIG_NETCONSOLE defined. If the netconsole script can find it
+in PATH or in the same directory, it will be used instead.
For Linux, the network-based console needs special configuration.
Minimally, the host IP address needs to be specified. This can be