Re: [LIP]blocking accept...

[Ashutosh M. <ash...@de...>]

Thanks Varun
	Thanks a lot for detailed explanation.
	As you suggested to go through "Unix Network Programming, Volume 1" by
Richard Stevens, I went through SO_REUSEADDR and SO_REUSEPORT Socket
Options.SO_REUSEADDR allows multiple instances of server to be started
on the same port(Though I am not able to run multiple instances even
after using SO_REUSEADDR socket option). And it has been recommeded that
SO_REUSEADDR socket option should be set before calling bind in all TCP
servers.
	But I was thinking, if my server has to do some work like reading data
from some file and modifying some data and writting back to the file,
and I am not locking files when I am reading or writting, in that case
the file might have inconsistent data in it. In this case I should not
allow my server to bind to same address or any alias if one instance of
it is already running, and so I should avoid using SO_REUSEADDR socket
option.
	I had one more question. How can I tell my server to accept any
connection from a specific IP?.

> Try this - start the server - don't
> connect even a single client - stop the server - and start it again - you should
> be able to start it again without any delay in this case, since no connected
> socket has been created. Works on my 2.4.17.

The same was happening even if I did not add folloing lines. 

struct linger ling;
ling. l_onoff = 1;
ling.l_linger = 0;
setsockopt(listenfd, SOL_SOCKET, SO_LINGER, &ling, sizeof(ling));

In fact the problem, I had in my first post in the thread, was only when
I connected at least one client. If I did not connect even a single
client it did not show me any error and started successfully

Thanks again.

ashutosh