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diff --git a/pipermail/nel/2001-March/000352.html b/pipermail/nel/2001-March/000352.html new file mode 100644 index 00000000..def14384 --- /dev/null +++ b/pipermail/nel/2001-March/000352.html @@ -0,0 +1,80 @@ +<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN"> +<HTML> + <HEAD> + <TITLE> [Nel] newbies about packet schema</TITLE> + <LINK REL="Index" HREF="index.html" > + <LINK REL="made" HREF="mailto:kjd%40cs.stanford.edu"> + <LINK REL="Previous" HREF="000338.html"> + <LINK REL="Next" HREF="000339.html"> + </HEAD> + <BODY BGCOLOR="#ffffff"> + <H1>[Nel] newbies about packet schema</H1> + <B>Kenneth Duda</B> + <A HREF="mailto:kjd%40cs.stanford.edu" + TITLE="[Nel] newbies about packet schema">kjd@cs.stanford.edu</A><BR> + <I>Sat, 3 Mar 2001 02:02:34 -0800</I> + <P><UL> + <LI> Previous message: <A HREF="000338.html">[Nel] newbies about packet schema</A></li> + <LI> Next message: <A HREF="000339.html">[Nel] compile.cpp</A></li> + <LI> <B>Messages sorted by:</B> + <a href="date.html#352">[ date ]</a> + <a href="thread.html#352">[ thread ]</a> + <a href="subject.html#352">[ subject ]</a> + <a href="author.html#352">[ author ]</a> + </LI> + </UL> + <HR> +<!--beginarticle--> +<PRE>><i> I have read artice for winsock program, if folling article is +</I>><i> true, that snow ball netowrk driver , should change it's packet +</I>><i> schema. any one can give me suggect ? +</I> +I am not familiar with the snowball protocol ("packet schema"). +However, I assure you that the article is correct --- attempting +to turn TCP from a byte stream into a sequenced message stream by +disabling Nagle will not work. The only way to implement message +semantics on top of TCP is to add your own packetization to the +byte stream. For example, + + + void SendMessage( int socket, const void * buf, size_t length ) + { + long l = htonl( length ); + write( socket, &l, 4 ); + write( socket, buf, length ); + } + + void RecvMessage( int socket, void * buf, size_t * length ) + { + long l; + read( socket, &l, 4 ); + l = ntohl( l ); + assert( l < *length ); + *length = l; + read( socket, buf, length ); + } + + +-Ken + +Kenneth J. Duda +Stanford University Distributed Systems Group +<<A HREF="mailto:kjd@cs.stanford.edu">kjd@cs.stanford.edu</A>> + + +</pre> + +<!--endarticle--> + <HR> + <P><UL> + <!--threads--> + <LI> Previous message: <A HREF="000338.html">[Nel] newbies about packet schema</A></li> + <LI> Next message: <A HREF="000339.html">[Nel] compile.cpp</A></li> + <LI> <B>Messages sorted by:</B> + <a href="date.html#352">[ date ]</a> + <a href="thread.html#352">[ thread ]</a> + <a href="subject.html#352">[ subject ]</a> + <a href="author.html#352">[ author ]</a> + </LI> + </UL> +</body></html> |