kcirtap

Hi all,

I am new to C and I need some help solving an issue with network programming.
So in general, i have two programs running: Program A and Program B.

Description of A:
Send out packet with SN = i
(SN is the label for the packet. i.e first pkt SN=1, 2nd pkt SN=2 etc)
Set timer
If RN=x is received from B, and x=i+1, set SN=i+1.
(RN is label for packet coming back from B)
Otherwise, ignore.

If timer expires, resend pkt SN=i
Reset timer
and repeat.

Description of B:
Send out packet with RN = j
Set timer
If SN=y is received from A, and y=i, set RN=i+1.
Otherwise, ignore.
repeat

In short, these two programs are just loops. A needs to receive an acknowledgment from B to proceed to the next state, otherwise resend the current packet. And for B, if B received a packet from A, it will send an acknowledgment to A telling it to move on to next state.

My problem is with the "Set timer" part. So this part is supposed to allow about 5 seconds for each program to receive pkt. For those who know how to use the select() function, I want something similar select() except it will watch over an integer (like SN and RN) instead of just a socket.

Thanks in advance.

Adak

You could use sleep(number of seconds), or Sleep(ditto). One or the other should be available on your system

BruceSmith

Hi!!
Only option is sleep as mentioned by "Adak".
I never done in C language but used in JAVA programming.
I don't have idea about the sleep function of C.
Sorry for that but yes you JAVA provides this function and I did the mentioned hand shake program.