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Help with TCP Options in C
07-24-2009
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netx(8) System Manager's Manual netx(8) Name netx - TCP/IP net exerciser Syntax /usr/field/netx [ -h ] [ -tn B ] [ -pm ] nodename Description The exerciser sets up a stream socket connection to the server in the TCP/IP internet domain. With connection made, the exerciser writes random data to the server; the server loops the data back to and the data is read and verified against the data written out. The exerciser runs in conjunction with the server. The exerciser by default will use the port number of the echo service in the file. Make sure that the TCP echo service is enabled in the file (no `#' in front of the service). The exerciser will run until or kill -15 pid is sent to the process. The nodename is the remote or local system host name running the server. Options The netx options are: -h Print the help message for the command. -tn Run time in minutes (n). The default is to run until the process receives or kill -15 pid. -pm Specify port number to use in internet domain (m < 32768). Note that this option is not used with the server, so you should never have to use this option. Restrictions If there is a need to run a system exerciser over an NFS link or on a diskless system, there are some restrictions. For exercisers that need to write into a file system, such as the target file system must be writable by root. Also the directory, in which any of the exer- cisers are executed, must be writable by root because temporary files are written into the current directory. These latter restrictions are sometimes difficult to overcome because often NFS file systems are mounted in a way that prevents root from writing into them. Some of the restrictions may be overcome by copying the exerciser to another directory and then executing it. Examples The following example exercises the TCP/IP network from the local host to node keel until a or kill -15 pid is received: % /usr/field/netx keel The following example exercises the TCP/IP network from the local host to node photon for 180 minutes in the background: % /usr/field/netx -t180 photon & See Also Guide to System Exercisers netx(8)