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diff --git a/docs/tutorials/009/combine.shar b/docs/tutorials/009/combine.shar deleted file mode 100644 index c12d2186061..00000000000 --- a/docs/tutorials/009/combine.shar +++ /dev/null @@ -1,394 +0,0 @@ -#!/bin/sh -# This is a shell archive (produced by GNU sharutils 4.2). -# To extract the files from this archive, save it to some FILE, remove -# everything before the `!/bin/sh' line above, then type `sh FILE'. -# -# Made on 1999-01-21 20:41 EST by <jcej@chiroptera.tragus.org>. -# Source directory was `/var/home/jcej/projects/ACE_wrappers/docs/tutorials/009'. -# -# Existing files will *not* be overwritten unless `-c' is specified. -# -# This shar contains: -# length mode name -# ------ ---------- ------------------------------------------ -# 520 -rw-rw-r-- hdr -# 59 -rw-rw-r-- bodies -# 2185 -rw-rw-r-- page01.pre -# 188 -rw-rw-r-- page02.pre -# 295 -rw-rw-r-- page03.pre -# 301 -rw-rw-r-- page04.pre -# 995 -rw-rw-r-- page05.pre -# 81 -rw-rw-r-- page02.pst -# 96 -rw-rw-r-- page03.pst -# -save_IFS="${IFS}" -IFS="${IFS}:" -gettext_dir=FAILED -locale_dir=FAILED -first_param="$1" -for dir in $PATH -do - if test "$gettext_dir" = FAILED && test -f $dir/gettext \ - && ($dir/gettext --version >/dev/null 2>&1) - then - set `$dir/gettext --version 2>&1` - if test "$3" = GNU - then - gettext_dir=$dir - fi - fi - if test "$locale_dir" = FAILED && test -f $dir/shar \ - && ($dir/shar --print-text-domain-dir >/dev/null 2>&1) - then - locale_dir=`$dir/shar --print-text-domain-dir` - fi -done -IFS="$save_IFS" -if test "$locale_dir" = FAILED || test "$gettext_dir" = FAILED -then - echo=echo -else - TEXTDOMAINDIR=$locale_dir - export TEXTDOMAINDIR - TEXTDOMAIN=sharutils - export TEXTDOMAIN - echo="$gettext_dir/gettext -s" -fi -touch -am 1231235999 $$.touch >/dev/null 2>&1 -if test ! -f 1231235999 && test -f $$.touch; then - shar_touch=touch -else - shar_touch=: - echo - $echo 'WARNING: not restoring timestamps. Consider getting and' - $echo "installing GNU \`touch', distributed in GNU File Utilities..." - echo -fi -rm -f 1231235999 $$.touch -# -if mkdir _sh23750; then - $echo 'x -' 'creating lock directory' -else - $echo 'failed to create lock directory' - exit 1 -fi -# ============= hdr ============== -if test -f 'hdr' && test "$first_param" != -c; then - $echo 'x -' SKIPPING 'hdr' '(file already exists)' -else - $echo 'x -' extracting 'hdr' '(text)' - sed 's/^X//' << 'SHAR_EOF' > 'hdr' && -<HTML> -<HEAD> -X <META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1"> -X <META NAME="GENERATOR" CONTENT="Mozilla/4.04 [en] (X11; I; Linux 2.0.32 i486) [Netscape]"> -X <META NAME="Author" CONTENT="James CE Johnson"> -X <TITLE>ACE Tutorial 009</TITLE> -</HEAD> -<BODY TEXT="#000000" BGCOLOR="#FFFFFF" LINK="#000FFF" VLINK="#FF0F0F"> -X -<CENTER><B><FONT SIZE=+2>ACE Tutorial 009</FONT></B></CENTER> -X -<CENTER><B><FONT SIZE=+2>Sending and receiving datagrams again</FONT></B></CENTER> -X -X -<P> -<HR WIDTH="100%"> -SHAR_EOF - $shar_touch -am 0121195099 'hdr' && - chmod 0664 'hdr' || - $echo 'restore of' 'hdr' 'failed' - if ( md5sum --help 2>&1 | grep 'sage: md5sum \[' ) >/dev/null 2>&1 \ - && ( md5sum --version 2>&1 | grep -v 'textutils 1.12' ) >/dev/null; then - md5sum -c << SHAR_EOF >/dev/null 2>&1 \ - || $echo 'hdr:' 'MD5 check failed' -808b7f288617f5b0a55256542f242912 hdr -SHAR_EOF - else - shar_count="`LC_ALL= LC_CTYPE= LANG= wc -c < 'hdr'`" - test 520 -eq "$shar_count" || - $echo 'hdr:' 'original size' '520,' 'current size' "$shar_count!" - fi -fi -# ============= bodies ============== -if test -f 'bodies' && test "$first_param" != -c; then - $echo 'x -' SKIPPING 'bodies' '(file already exists)' -else - $echo 'x -' extracting 'bodies' '(text)' - sed 's/^X//' << 'SHAR_EOF' > 'bodies' && -PAGE=2 -server.cpp -directed_client.cpp -broadcast_client.cpp -SHAR_EOF - $shar_touch -am 0121195199 'bodies' && - chmod 0664 'bodies' || - $echo 'restore of' 'bodies' 'failed' - if ( md5sum --help 2>&1 | grep 'sage: md5sum \[' ) >/dev/null 2>&1 \ - && ( md5sum --version 2>&1 | grep -v 'textutils 1.12' ) >/dev/null; then - md5sum -c << SHAR_EOF >/dev/null 2>&1 \ - || $echo 'bodies:' 'MD5 check failed' -707d1735ca25694e2b5fddc1f6e7e124 bodies -SHAR_EOF - else - shar_count="`LC_ALL= LC_CTYPE= LANG= wc -c < 'bodies'`" - test 59 -eq "$shar_count" || - $echo 'bodies:' 'original size' '59,' 'current size' "$shar_count!" - fi -fi -# ============= page01.pre ============== -if test -f 'page01.pre' && test "$first_param" != -c; then - $echo 'x -' SKIPPING 'page01.pre' '(file already exists)' -else - $echo 'x -' extracting 'page01.pre' '(text)' - sed 's/^X//' << 'SHAR_EOF' > 'page01.pre' && -X -<P>In our previous tutorial, we created a datagram listener and a couple -of clients that would send it datagrams. That server would respond -to any datagram sent to the TCP/IP port at which the server was listening. -What we really want to do, however, is to have the server only respond -to clients that meet some criteria. -X -<P>Why is this important? -X -<P>Imagine you're writting a distributed system that will have many server -applications. Each of those will probably listen at different (and -well-known) TCP/IP addresses so that clients can find each server -without confusion. However... In a large system you might have -several <I>versions</I> of the same server running at the same time*. -You probably don't want those servers running at different addresses since -that breaks the well-known address requirement. -X -<P>By creating a datagram listener similar to the last tutorial, a client -can send broadcast datagrams to locate all of the servers listening at -the well-known address. By adding a thin protocol layer into -the datagram contents, the servers can be selective about which clients -they respond to. Thus, if each client sends its version signature -in the broadcast, then the servers can choose to respond only to clients -with matching versions. -<P> -Kirthika's Abstract: -<UL> -Here, the client uses datagrams for discovery of the server in the -subnet and also sends a signature for authentification. The server -decides on replying to the client depending on the signature. The only -changes from the previous tutorial are in the addition of an extra -signature matching portion on the server side and providing timeout -values on the client side which allows the send() and recv() calls to -return on a timeout if the target party fails to respond. -<P> -This feature of discrimnation depending on the client signature could be -used for security reasons or version confirmation by the server. -</UL> -<P><FONT SIZE=-1>*Note: I'm making the assumption that your multiple -server versions will be running on different hosts since you can only have -one server listening at the well-known address on a given host.</FONT> -X -SHAR_EOF - $shar_touch -am 0121195099 'page01.pre' && - chmod 0664 'page01.pre' || - $echo 'restore of' 'page01.pre' 'failed' - if ( md5sum --help 2>&1 | grep 'sage: md5sum \[' ) >/dev/null 2>&1 \ - && ( md5sum --version 2>&1 | grep -v 'textutils 1.12' ) >/dev/null; then - md5sum -c << SHAR_EOF >/dev/null 2>&1 \ - || $echo 'page01.pre:' 'MD5 check failed' -c6367380deb11b98c346d35794fac6cd page01.pre -SHAR_EOF - else - shar_count="`LC_ALL= LC_CTYPE= LANG= wc -c < 'page01.pre'`" - test 2185 -eq "$shar_count" || - $echo 'page01.pre:' 'original size' '2185,' 'current size' "$shar_count!" - fi -fi -# ============= page02.pre ============== -if test -f 'page02.pre' && test "$first_param" != -c; then - $echo 'x -' SKIPPING 'page02.pre' '(file already exists)' -else - $echo 'x -' extracting 'page02.pre' '(text)' - sed 's/^X//' << 'SHAR_EOF' > 'page02.pre' && -X -<P>Let's take a look at our new <A HREF="server.cpp">server.cpp</A> where -we add in just a bit of code to examine the datagram contents before responding. -X -<P> -<HR WIDTH="100%"><TT></TT> -SHAR_EOF - $shar_touch -am 0121195099 'page02.pre' && - chmod 0664 'page02.pre' || - $echo 'restore of' 'page02.pre' 'failed' - if ( md5sum --help 2>&1 | grep 'sage: md5sum \[' ) >/dev/null 2>&1 \ - && ( md5sum --version 2>&1 | grep -v 'textutils 1.12' ) >/dev/null; then - md5sum -c << SHAR_EOF >/dev/null 2>&1 \ - || $echo 'page02.pre:' 'MD5 check failed' -76a728cf5d0f42ca9b7d7a6fa0637384 page02.pre -SHAR_EOF - else - shar_count="`LC_ALL= LC_CTYPE= LANG= wc -c < 'page02.pre'`" - test 188 -eq "$shar_count" || - $echo 'page02.pre:' 'original size' '188,' 'current size' "$shar_count!" - fi -fi -# ============= page03.pre ============== -if test -f 'page03.pre' && test "$first_param" != -c; then - $echo 'x -' SKIPPING 'page03.pre' '(file already exists)' -else - $echo 'x -' extracting 'page03.pre' '(text)' - sed 's/^X//' << 'SHAR_EOF' > 'page03.pre' && -X -<P>Our new <A HREF="directed_client.cpp">directed_client.cpp</A> -is very much like our previous one. The primary difference is the -addition of a timeout to the recv() call so that we can exit somewhat gracefully -if the server doesn't like what we have to say. -X -<P> -<HR WIDTH="100%"> -SHAR_EOF - $shar_touch -am 0121194999 'page03.pre' && - chmod 0664 'page03.pre' || - $echo 'restore of' 'page03.pre' 'failed' - if ( md5sum --help 2>&1 | grep 'sage: md5sum \[' ) >/dev/null 2>&1 \ - && ( md5sum --version 2>&1 | grep -v 'textutils 1.12' ) >/dev/null; then - md5sum -c << SHAR_EOF >/dev/null 2>&1 \ - || $echo 'page03.pre:' 'MD5 check failed' -58878c3f2b7d458371fdf243db6cba61 page03.pre -SHAR_EOF - else - shar_count="`LC_ALL= LC_CTYPE= LANG= wc -c < 'page03.pre'`" - test 295 -eq "$shar_count" || - $echo 'page03.pre:' 'original size' '295,' 'current size' "$shar_count!" - fi -fi -# ============= page04.pre ============== -if test -f 'page04.pre' && test "$first_param" != -c; then - $echo 'x -' SKIPPING 'page04.pre' '(file already exists)' -else - $echo 'x -' extracting 'page04.pre' '(text)' - sed 's/^X//' << 'SHAR_EOF' > 'page04.pre' && -X -<P>As you can see in <A HREF="broadcast_client.cpp">broadcast_client.cpp</A>, -there isn't enough difference to even comment on! Look back to the -Tutorial 8 version of this file. The only difference is the addition -of the timeout variable passed to recv(). -X -<P> -<HR WIDTH="100%"><TT></TT> -SHAR_EOF - $shar_touch -am 0121195099 'page04.pre' && - chmod 0664 'page04.pre' || - $echo 'restore of' 'page04.pre' 'failed' - if ( md5sum --help 2>&1 | grep 'sage: md5sum \[' ) >/dev/null 2>&1 \ - && ( md5sum --version 2>&1 | grep -v 'textutils 1.12' ) >/dev/null; then - md5sum -c << SHAR_EOF >/dev/null 2>&1 \ - || $echo 'page04.pre:' 'MD5 check failed' -8c92e7ef51e85491bc2d7991a5b62cbb page04.pre -SHAR_EOF - else - shar_count="`LC_ALL= LC_CTYPE= LANG= wc -c < 'page04.pre'`" - test 301 -eq "$shar_count" || - $echo 'page04.pre:' 'original size' '301,' 'current size' "$shar_count!" - fi -fi -# ============= page05.pre ============== -if test -f 'page05.pre' && test "$first_param" != -c; then - $echo 'x -' SKIPPING 'page05.pre' '(file already exists)' -else - $echo 'x -' extracting 'page05.pre' '(text)' - sed 's/^X//' << 'SHAR_EOF' > 'page05.pre' && -In this tutorial we've expanded on Tutorial 8 to provide a more discriminating -server application. The changes to the clients were trivial, amounting -to not much more than the addition of a timeout when reading a server's -potential response. The server change was a bit more since it had -to compare the clients' query with it's own signature. -X -<P>In a "real" system, the signatures you swap would probably include version -information. You could even use a major/minor scheme where an exact -match isn't necessary. Another upgrade might be to have a set of -signatures at one or both ends of the conversation. The level of -service provided by the server would be determined by the signature pair -match. -X -<P>Here's the final file list: -<UL> -<LI> -<A HREF="Makefile">Makefile</A></LI> -X -<LI> -<A HREF="server.cpp">server.cpp</A></LI> -X -<LI> -<A HREF="directed_client.cpp">directed_client.cpp</A></LI> -X -<LI> -<A HREF="broadcast_client.cpp">broadcast_client.cpp</A></LI> -</UL> -X -SHAR_EOF - $shar_touch -am 0121194999 'page05.pre' && - chmod 0664 'page05.pre' || - $echo 'restore of' 'page05.pre' 'failed' - if ( md5sum --help 2>&1 | grep 'sage: md5sum \[' ) >/dev/null 2>&1 \ - && ( md5sum --version 2>&1 | grep -v 'textutils 1.12' ) >/dev/null; then - md5sum -c << SHAR_EOF >/dev/null 2>&1 \ - || $echo 'page05.pre:' 'MD5 check failed' -835e97e1b6ac1747ef9508936a56a6cc page05.pre -SHAR_EOF - else - shar_count="`LC_ALL= LC_CTYPE= LANG= wc -c < 'page05.pre'`" - test 995 -eq "$shar_count" || - $echo 'page05.pre:' 'original size' '995,' 'current size' "$shar_count!" - fi -fi -# ============= page02.pst ============== -if test -f 'page02.pst' && test "$first_param" != -c; then - $echo 'x -' SKIPPING 'page02.pst' '(file already exists)' -else - $echo 'x -' extracting 'page02.pst' '(text)' - sed 's/^X//' << 'SHAR_EOF' > 'page02.pst' && -<HR WIDTH="100%"> -X -<P>Let's move on and see what changes the clients require... -X -SHAR_EOF - $shar_touch -am 0121195099 'page02.pst' && - chmod 0664 'page02.pst' || - $echo 'restore of' 'page02.pst' 'failed' - if ( md5sum --help 2>&1 | grep 'sage: md5sum \[' ) >/dev/null 2>&1 \ - && ( md5sum --version 2>&1 | grep -v 'textutils 1.12' ) >/dev/null; then - md5sum -c << SHAR_EOF >/dev/null 2>&1 \ - || $echo 'page02.pst:' 'MD5 check failed' -76a64b9c5c1d1baa1425085b1649fb31 page02.pst -SHAR_EOF - else - shar_count="`LC_ALL= LC_CTYPE= LANG= wc -c < 'page02.pst'`" - test 81 -eq "$shar_count" || - $echo 'page02.pst:' 'original size' '81,' 'current size' "$shar_count!" - fi -fi -# ============= page03.pst ============== -if test -f 'page03.pst' && test "$first_param" != -c; then - $echo 'x -' SKIPPING 'page03.pst' '(file already exists)' -else - $echo 'x -' extracting 'page03.pst' '(text)' - sed 's/^X//' << 'SHAR_EOF' > 'page03.pst' && -<HR WIDTH="100%"> -X -<P>On the next page, we see that the directed_client gets similar upgrades. -X -SHAR_EOF - $shar_touch -am 0121195099 'page03.pst' && - chmod 0664 'page03.pst' || - $echo 'restore of' 'page03.pst' 'failed' - if ( md5sum --help 2>&1 | grep 'sage: md5sum \[' ) >/dev/null 2>&1 \ - && ( md5sum --version 2>&1 | grep -v 'textutils 1.12' ) >/dev/null; then - md5sum -c << SHAR_EOF >/dev/null 2>&1 \ - || $echo 'page03.pst:' 'MD5 check failed' -11fda077df9a3ef7155f33e75cc9b6b6 page03.pst -SHAR_EOF - else - shar_count="`LC_ALL= LC_CTYPE= LANG= wc -c < 'page03.pst'`" - test 96 -eq "$shar_count" || - $echo 'page03.pst:' 'original size' '96,' 'current size' "$shar_count!" - fi -fi -rm -fr _sh23750 -exit 0 |