read socket

adoyee · 02-26-2004, 12:49 AM

Mesg recieved is less than sent.I put read() in a while loop,but read blocks and the program stops.

How to recieve the same mesg with server sent?

doraiashok · 02-26-2004, 04:05 AM

Give a bit more information on the code.

From my current point of view, the problem could be that you haven't sent the full string.

For example if you are sending the string str, you better give the length of the string as strlen(str)+1 so as to include the '\0'

Still your question is not clear to me....

krajzega · 02-26-2004, 05:54 AM

1. Receiving buffer can't be smaller than sending
2. As a 3rd argument of recv (or read) you should use sizeof(buf) not strlen(buf)
3. You shouldn't use MSG_OOB as a flag in recv()
And also some questions:
What kind of socket are you using?
How big is the data you are sending?

doraiashok · 02-26-2004, 06:06 AM

While sending the string buf, the length of the string has to be strlen(buf) and not sizeof(buf). For reasons take a look at the code below,

Code:

char message[1000];
.....
.....
strcpy(message,"hi");
send(sockfd,message,strlen(message)+1,0); // sends 3 bytes
send(sockfd,message,sizeof(message),0); // sends 1000 bytes

If you use sizeof(message) then 1000 bytes will be sent which is unnecessary because only 3 bytes are meaning full.