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man page of udp-receiver

udp-receiver: receive files broadcast by udp-sender


udp-receiver - receive files broadcast by udp-sender


./udp-receiver [--file file] [--pipe pipe] [--portbase portbase] [--interface net-interface] [--log file] [--ttl time-to-live] [--mcast-rdv-address mcast-rdv-address] [--nokbd] [--exitWait milliseconds] [--stat-period n] [--print-uncompressed-position flag]
"Udp-receiver" is used to receive files sent by "udp-sender" (for instance a disk image).
Basic options --file file Writes received data to file. If this parameter is not supplied, received data is written to stdout instead. --pipe command Sends data through pipe after receiving it. This is useful for decompressing the data, or for filling in unused filesystem blocks that may have been stripped out by udp-sender. The command gets a direct handle on the output file or device, and thus may seek inside it, if needed. "Udpcast" itself also keeps a handle on the file, which is used for an informational progress display. The command's stdin is a pipe from udp-receiver. Example: "udp-receiver -p "gzip -dc"" --log file Logs some stuff into file. --nosync Do not open target in synchronous mode. This is the default when writing to a file or a pipe. --sync Write to target in synchronous mode. This is the default when writing to a device (character or block) --nokbd Do not read start signal from keyboard, and do not display any message telling the user to press any key to start. --start-timeout sec receiver aborts at start if it doesn't see a sender within this many seconds. Furthermore, the sender needs to start transmission of data within this delay. Once transmission is started, the timeout no longer applies. Networking options --portbase portbase Default ports to use for udpcast. Two ports are used: portbase and portbase+1 . Thus, Portbase must be even. Default is 9000. The same portbase must be specified for both "udp-sender" and "udp-receiver". --interface interface Network interface used to send out the data. Default is "eth0" --ttl ttl Time to live for connection request packet (by default connection request is broadcast to the LAN's broadcast address. If ttl is set, the connection request is multicast instead to with the given ttl, which should enable udpcast to work between LANs. Not tested though. --mcast-rdv-address address Uses a non-standard multicast address for the control connection (which is used by the sender and receivers to "find" each other). This is not the address that is used to transfer the data. By default "mcast-rdv-address" is the Ethernet broadcast address if "ttl" is 1, and otherwise. This setting should not be used except in very special situations, such as when cannot be used for policy reasons. --exit-wait milliseconds When transmission is over, receiver will wait for this time after receiving the final REQACK. This is done in order to guard against loss of the final ACK. Is 500 milliseconds by default. --ignore-lost-data Do not stop reception when data loss is detected, but instead fill with random data. This is useful for multimedia transmission where 100% integrity is not need. Statistics options --stat-period seconds Every so much milliseconds, print some statistics to stderr: how much bytes received so far log, position in uncompressed file (if applicable), overall bitrate... By default, this is printed every half second. --print-uncompressed-position flag By default, udp-receiver only prints the position in uncompressed file if the 2 following conditions are met: o Output is piped via a compressor ("-p " option). o The final output is seekable (file or device) With the "--print-uncompressed-position", options, you can change this behavior: o If flag is 0, uncompressed position will never be printed, even if above conditions are met o If flag is 1, uncompressed position will always be printed, even if above conditions are not met




Alain Knaff UDP-RECEIVER(1)

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