config BR2_PACKAGE_TCPING | |
bool "tcping" | |
help | |
tcping does a TCP connect to the given ip/port | |
combination. The user can specify a timeout in seconds. This | |
is useful in shell scripts running in firewalled | |
environments. Often SYNs are just being dropped by | |
firewalls, thus connection establishment will be retried | |
several times (for minutes) until a TCP timeout is | |
reached. With tcping it is possible to check first if the | |
desired port is reachable and then start connection | |
establishment. | |
http://linuxco.de/tcping/tcping.html |