Server listening on 2 differents ports

[ssantamariagarcia]

I am trying to program a server in C for UNIX to get a kind of "bridge"
between the clients of a port A and the clients of a port B.
For that, I create 2 processes: one that listen the requests of port A
clients and another for the Port B ones.

In each process, when a connetion service is required, after accepting
, the value of the socket generated is added to a set of sockets. This
set keeps on listening on each socket for new messages to be read.

the question is that both processes get the same socket values, I
mean, the first client asking on port A get the same socket number that
the first one on port B. So I can not refer to a client in a unique way
, because there will be 2 clients with the same socket number .

I am using fork(), and in each process created, I use a method in
charge of creating the set of sockets and waiting for some event. I
suspect that the use of fork() is not right in this situation.........
In other words: If there is anybody who could know how to program a
server which is going to receive messages on 2 diferents ports and it
has to carry them from one port to another ( both ways), please, please
help me.
Thanks a lot !
(Sorry about my english)

[Lawrence Kirby]

On Tue, 05 Jul 2005 04:16:27 -0700, ssantamariagarcia wrote:

I am trying to program a server in C for UNIX to get a kind of "bridge"
between the clients of a port A and the clients of a port B.
For that, I create 2 processes: one that listen the requests of port A
clients and another for the Port B ones.

In each process, when a connetion service is required, after accepting
, the value of the socket generated is added to a set of sockets. This
set keeps on listening on each socket for new messages to be read.

Your question is about Unix and socket programming which are not covered
by the C language itself. A good newsgroup to ask your question is
comp.unix.programmer.

Lawrence

[ssantamariagarcia]

I' ll try there. Thanks a lot

Sonia

[CBFalconer]

ss***************@hotmail.com wrote:

I am trying to program a server in C for UNIX to get a kind of
"bridge" between the clients of a port A and the clients of a
port B. For that, I create 2 processes: one that listen the
requests of port A clients and another for the Port B ones.
.... snip ...
(Sorry about my english)

Your English is satisfactory, your choice of newsgroups is not.
The C language knows nothing about ports, processes, clients,
forks, etc. You want a newsgroup that deals with those things.
Something with one of posix, linux, unix in its name seems
suitable.

Before posting there stop and read several days, or a weeks, worth
of postings. This should give you a strong feeling for whether or
not your query is topical. Read any welcome or FAQs associated
with the group.

--
"If you want to post a followup via groups.google.com, don't use
the broken "Reply" link at the bottom of the article. Click on
"show options" at the top of the article, then click on the
"Reply" at the bottom of the article headers." - Keith Thompson