Public bug reported:
When connecting to a remote host, both the command-line help and man-
page state that specifying `-p` will set the local port number. However,
when I actually attempt to do it, only the usage text is printed:
$ nc.openbsd -p 12345 localhost 12345
usage: nc [-46CDdFhklNnrStUuvZz] [-I length] [-i interval] [-M ttl]
[-m minttl] [-O length] [-P proxy_username] [-p source_port]
[-q seconds] [-s source] [-T keyword] [-V rtable] [-W recvlimit] [-w timeout]
[-X proxy_protocol] [-x proxy_address[:port]] [destination] [port]
This appears to be caused by an erroneous check on line 541 of netcat.c,
introduced by `misc-failures-and-features.patch`. If I remove the check
or undo the patch completely, the source port is set correctly, but
remains bound after I close the connection. Meanwhile, netcat-
traditional works as expected.
** Affects: netcat-openbsd (Ubuntu)
Importance: Undecided
Status: New
** Description changed:
When connecting to a remote host, both the command-line help and man-
page state that specifying `-p` will set the local port number. However,
when I actually attempt to do it, only the usage text is printed:
- $ nc.openbsd -p 12345 localhost 12345
- usage: nc [-46CDdFhklNnrStUuvZz] [-I length] [-i interval] [-M ttl]
- [-m minttl] [-O length] [-P proxy_username] [-p source_port]
- [-q seconds] [-s source] [-T keyword] [-V rtable] [-W recvlimit] [-w
timeout]
- [-X proxy_protocol] [-x proxy_address[:port]] [destination]
[port]
+ $ nc.openbsd -p 12345 localhost 12345
+ usage: nc [-46CDdFhklNnrStUuvZz] [-I length] [-i interval] [-M ttl]
+ [-m minttl] [-O length] [-P proxy_username] [-p source_port]
+ [-q seconds] [-s source] [-T keyword] [-V rtable] [-W recvlimit] [-w
timeout]
+ [-X proxy_protocol] [-x proxy_address[:port]] [destination] [port]
This appears to be caused by an erroneous check on line 541 of netcat.c,
introduced by `misc-failures-and-features.patch`. If I remove the check
or undo the patch completely, the source port is set correctly, but
remains bound after I close the connection. Meanwhile, netcat-
traditional works as expected.
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https://bugs.launchpad.net/bugs/1772014
Title:
netcat-openbsd does not allow setting source port
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