help

[Lev Walkin]

DANDY King wrote:
> hello
> 
> 
> our product is DVR(digital video recorder), it runs on linux system.
> i am sending very imp inofrmation to server through sockets. some time i 
> am getting full data, some time i am getting partial data.
> i don't know reasons please advice.
> client side we uses VC++ GUI. client sending data neatly. in lcinet 
> side  what i did
> 
> while((nread = read(fd,buff,BUFFSIZE)) >0)
>         send(sockfd,buff,nread,0);
> 
> in server same data should receive.
> but some time i am receiveing full and some time 90% only

Are you aware that the send() function could queue less data
than requested? The better loop would look like:

while((nread = read(fd, buff, BUFFSIZE)) > 0) {
	ssize_t sent;
	char *b = buff;

	while(nread > 0) {
		sent = send(sockfd, b, nread, 0);
		if(sent > 0) {
			nread -= sent;
			b += sent;
		} else {
			/* Handle "can't send" case */
			break;
		}
	}
}



> please advice
> 
> Dharanish
> 
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-- 
Lev Walkin
vlm at netli.com