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Julien-ElieJulien-Elie
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Initial implementation of the COMPRESS command in INN
Based on draft-murchison-nntp-compress-02 (still not published as an RFC). The COMPRESS command is an extension to the NNTP protocol to allow a connection to be effectively and efficiently compressed. News clients that also support that extension will be able to benefit from that bandwidth optimization and improvement in speed. Initial implementation in INN contributed by Julien Elie.
1 parent daf5070 commit 790e4ab

15 files changed

Lines changed: 467 additions & 46 deletions

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‎MANIFEST‎

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@@ -622,6 +622,7 @@ nnrpd/sasl.c SASL authentication for nnrpd
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nnrpd/tls.c Transport layer security
623623
nnrpd/tls.h Transport layer security data types
624624
nnrpd/track.c Track client behavior
625+
nnrpd/zlib.c Compression support for nnrpd
625626
perl Perl libraries (Directory)
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perl/INN INN Perl modules (Directory)
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perl/INN/Config.pm.in INN::Config module

‎Makefile.global.in‎

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@@ -126,12 +126,19 @@ EXTLIB = @EXTLIB@
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LIBCC = $(LIBTOOLCC) $(CC)
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LIBLD = $(LIBTOOLLD) $(CC)
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129+
## zlib support. Additional flags and libraries used when compiling or
130+
## linking code that contains compression support.
131+
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ZLIB_CPPFLAGS = @ZLIB_CPPFLAGS@
133+
ZLIB_LDFLAGS = @ZLIB_LDFLAGS@
134+
ZLIB_LIBS = @ZLIB_LIBS@
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## Berkeley DB support. If this support is configured, anything linking
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## against libstorage also needs to link against BDB_LDFLAGS and BDB_LIBS.
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BDB_CPPFLAGS = @BDB_CPPFLAGS@ @ZLIB_CPPFLAGS@
133-
BDB_LDFLAGS = @BDB_LDFLAGS@ @ZLIB_LDFLAGS@
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BDB_LIBS = @BDB_LIBS@ @ZLIB_LIBS@
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139+
BDB_CPPFLAGS = @BDB_CPPFLAGS@ $(ZLIB_CPPFLAGS)
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BDB_LDFLAGS = @BDB_LDFLAGS@ $(ZLIB_LDFLAGS)
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BDB_LIBS = @BDB_LIBS@ $(ZLIB_LIBS)
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## INN libraries. Nearly all INN programs are linked with libinn, and any
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## INN program that reads from or writes to article storage or overview is

‎configure.ac‎

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@@ -324,11 +324,12 @@ if test x"$inn_enable_keywords" = x1 ; then
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fi
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dnl Handle optional libraries and probing for their locations and component
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dnl libraries if needed. Support for zlib is handled later.
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dnl libraries if needed.
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INN_LIB_BDB_OPTIONAL
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INN_LIB_KRB5_OPTIONAL
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INN_LIB_OPENSSL_OPTIONAL
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INN_LIB_SASL_OPTIONAL
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INN_LIB_ZLIB_OPTIONAL
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dnl If Kerberos is found, define KRB5_AUTH to auth_krb5 so as to build
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dnl that program. In case neither et/com_err.h nor kerberosv5/com_err.h
@@ -345,8 +346,8 @@ AS_IF([test x"$inn_use_KRB5" = xtrue],
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[AC_MSG_ERROR([cannot find usable com_err header])])])])])])
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AC_SUBST([KRB5_AUTH])
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dnl If Berkeley DB is found, check the presence of its header.
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dnl Also, do not build with zlib support unless Berkeley DB is enabled.
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dnl If Berkeley DB is found, check the presence of its header and whether the
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dnl Berkeley DB library has ndbm support.
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AS_IF([test x"$inn_use_BDB" = xtrue],
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[inn_BDB_incroot=
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inn_BDB_header_found=
@@ -364,8 +365,7 @@ AS_IF([test x"$inn_use_BDB" = xtrue],
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[Define if you have the <db.h> header file.])],
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[inn_BDB_header_found=no])])
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AS_IF([test x"${inn_BDB_header_found}" = xyes],
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[INN_LIB_BDB_NDBM
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INN_LIB_ZLIB_OPTIONAL],
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[INN_LIB_BDB_NDBM],
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[AS_IF([test x"$with_bdb" = x],
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[BDB_CPPFLAGS=
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BDB_LDFLAGS=

‎doc/pod/install.pod‎

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@@ -413,15 +413,21 @@ explicitly passed to configure.
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=item B<--with-zlib>=PATH
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The ovdb storage method can optionally use compression. If B<--with-bdb>
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is set, and configure finds a suitable S<Berkeley DB> version, configure
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will by default also try to find the zlib library. INN will then be
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built with zlib support unless the B<--without-zlib> flag is explicitly
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passed to configure.
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Enables support for compression for news reading, which means a
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compression layer can be negotiated between your server and newsreaders
418+
supporting that NNTP extension.
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420+
Also enables support for compression with the ovdb storage method.
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422-
In case non-standard paths to the zlib library are used, one or both
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of the options B<--with-zlib-include> and B<--with-zlib-lib> can be
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given to configure with a path.
422+
This option requires that zlib be installed on your system (including the
423+
header files, not just the runtime libraries). If a path is given, it
424+
sets the installed directory of zlib. In case non-standard paths to the
425+
zlib library are used, one or both of the options B<--with-zlib-include>
426+
and B<--with-zlib-lib> can be given to configure with a path.
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If the zlib library is found at configure time, INN will be built with
429+
compression support unless the B<--without-zlib> flag is explicitly
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passed to configure.
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=item B<--with-openssl>=PATH
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‎doc/pod/news.pod‎

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@@ -13,6 +13,14 @@ true and UTC is really the local time zone of the server.
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=item *
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Julien Elie has implemented in B<nnrpd> the new COMPRESS command
17+
described in draft-murchison-nntp-compress that extends the NNTP protocol
18+
to allow a connection to be effectively and efficiently compressed.
19+
News clients that also support that extension will be able to benefit
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from that bandwidth optimization and improvement in speed.
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=item *
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When an encryption layer is negotiated during a successful use of the
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STARTTLS command, or after a successful authentication using a SASL
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mechanism which negotiates an encryption layer, B<nnrpd> now updates

‎include/inn/nntp.h‎

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@@ -55,6 +55,7 @@ enum nntp_code {
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NNTP_OK_BANNER_POST = 200,
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NNTP_OK_BANNER_NOPOST = 201,
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NNTP_OK_QUIT = 205,
58+
NNTP_OK_COMPRESS = 206,
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NNTP_OK_GROUP = 211,
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NNTP_OK_LIST = 215,
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NNTP_OK_ARTICLE = 220,

‎innd/nc.c‎

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@@ -88,6 +88,9 @@ static NCDISPATCH NCcommands[] = {
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READER command. */
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COMMAND_READER("ARTICLE"),
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COMMAND_READER("BODY"),
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#if defined(HAVE_ZLIB)
92+
COMMAND_READER("COMPRESS"),
93+
#endif /* HAVE_ZLIB */
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COMMAND_READER("DATE"),
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COMMAND_READER("GROUP"),
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COMMAND_READER("HDR"),

‎nnrpd/Makefile‎

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@@ -3,13 +3,13 @@
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include ../Makefile.global
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top = ..
6-
CFLAGS = $(GCFLAGS) $(SSL_CPPFLAGS) $(SASL_CPPFLAGS)
6+
CFLAGS = $(GCFLAGS) $(SSL_CPPFLAGS) $(SASL_CPPFLAGS) $(ZLIB_CPPFLAGS)
77

88
ALL = nnrpd
99

10-
SOURCES = article.c auth-ext.c cache.c group.c commands.c line.c \
10+
SOURCES = article.c auth-ext.c cache.c commands.c group.c line.c \
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list.c misc.c newnews.c nnrpd.c perl.c perm.c post.c \
12-
python.c sasl.c tls.c track.c
12+
python.c sasl.c tls.c track.c zlib.c
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1414
INCLUDES = cache.h nnrpd.h post.h tls.h
1515

@@ -34,10 +34,11 @@ clean clobber distclean maintclean:
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NNRPDLIBS = $(LIBSTORAGE) $(LIBHIST) $(LIBINN) $(STORAGE_LIBS) \
3636
$(PERL_LIBS) $(PYTHON_LIBS) $(SSL_LDFLAGS) $(SSL_LIBS) \
37-
$(CRYPTO_LIBS) $(SASL_LDFLAGS) $(SASL_LIBS) $(LIBS)
37+
$(CRYPTO_LIBS) $(SASL_LDFLAGS) $(SASL_LIBS) \
38+
$(ZLIB_LDFLAGS) $(ZLIB_LIBS) $(LIBS)
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.c.o:
40-
$(CC) $(CFLAGS) $(SSL_CPPFLAGS) $(SASL_CPPFLAGS) -c $<
41+
$(CC) $(CFLAGS) -c $<
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perl.o: perl.c ; $(CC) $(CFLAGS) $(PERL_CPPFLAGS) -c perl.c
4344
python.o: python.c ; $(CC) $(CFLAGS) $(PYTHON_CPPFLAGS) -c python.c
@@ -104,19 +105,6 @@ cache.o: cache.c ../include/config.h ../include/inn/defines.h \
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../include/inn/tst.h ../include/inn/list.h ../include/inn/libinn.h \
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../include/inn/xmalloc.h ../include/inn/xwrite.h \
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../include/inn/storage.h ../include/inn/options.h cache.h
107-
group.o: group.c ../include/config.h ../include/inn/defines.h \
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../include/inn/system.h ../include/inn/macros.h \
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../include/inn/portable-macros.h ../include/inn/portable-stdbool.h \
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../include/inn/defines.h ../include/inn/options.h ../include/clibrary.h \
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../include/config.h ../include/inn/macros.h \
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../include/portable/stdbool.h ../include/inn/innconf.h nnrpd.h \
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../include/portable/macros.h ../include/portable/socket.h \
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../include/portable/getaddrinfo.h ../include/portable/getnameinfo.h \
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../include/inn/qio.h ../include/inn/libinn.h ../include/inn/xmalloc.h \
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../include/inn/xwrite.h ../include/inn/nntp.h ../include/inn/paths.h \
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../include/inn/storage.h ../include/inn/options.h \
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../include/inn/vector.h ../include/inn/timer.h ../include/inn/ov.h \
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../include/inn/history.h ../include/inn/storage.h
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commands.o: commands.c ../include/config.h ../include/inn/defines.h \
121109
../include/inn/system.h ../include/inn/macros.h \
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../include/inn/portable-macros.h ../include/inn/portable-stdbool.h \
@@ -132,6 +120,19 @@ commands.o: commands.c ../include/config.h ../include/inn/defines.h \
132120
../include/inn/ov.h ../include/inn/history.h ../include/inn/storage.h \
133121
../include/inn/innconf.h ../include/inn/messages.h \
134122
../include/inn/version.h tls.h
123+
group.o: group.c ../include/config.h ../include/inn/defines.h \
124+
../include/inn/system.h ../include/inn/macros.h \
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../include/inn/portable-macros.h ../include/inn/portable-stdbool.h \
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../include/inn/defines.h ../include/inn/options.h ../include/clibrary.h \
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../include/config.h ../include/inn/macros.h \
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../include/portable/stdbool.h ../include/inn/innconf.h nnrpd.h \
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../include/portable/macros.h ../include/portable/socket.h \
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../include/portable/getaddrinfo.h ../include/portable/getnameinfo.h \
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../include/inn/qio.h ../include/inn/libinn.h ../include/inn/xmalloc.h \
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../include/inn/xwrite.h ../include/inn/nntp.h ../include/inn/paths.h \
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../include/inn/storage.h ../include/inn/options.h \
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../include/inn/vector.h ../include/inn/timer.h ../include/inn/ov.h \
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../include/inn/history.h ../include/inn/storage.h
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line.o: line.c ../include/config.h ../include/inn/defines.h \
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../include/inn/system.h ../include/inn/macros.h \
137138
../include/inn/portable-macros.h ../include/inn/portable-stdbool.h \
@@ -290,3 +291,15 @@ track.o: track.c ../include/config.h ../include/inn/defines.h \
290291
../include/inn/xwrite.h ../include/inn/nntp.h ../include/inn/paths.h \
291292
../include/inn/storage.h ../include/inn/options.h \
292293
../include/inn/vector.h ../include/inn/timer.h
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zlib.o: zlib.c ../include/config.h ../include/inn/defines.h \
295+
../include/inn/system.h ../include/inn/macros.h \
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../include/inn/portable-macros.h ../include/inn/portable-stdbool.h \
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../include/inn/defines.h ../include/inn/options.h ../include/clibrary.h \
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../include/config.h ../include/inn/macros.h \
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../include/portable/stdbool.h ../include/inn/messages.h nnrpd.h \
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../include/portable/macros.h ../include/portable/socket.h \
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../include/portable/getaddrinfo.h ../include/portable/getnameinfo.h \
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../include/inn/qio.h ../include/inn/libinn.h ../include/inn/xmalloc.h \
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../include/inn/xwrite.h ../include/inn/nntp.h ../include/inn/paths.h \
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../include/inn/storage.h ../include/inn/options.h \
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../include/inn/vector.h ../include/inn/timer.h

‎nnrpd/article.c‎

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@@ -64,6 +64,23 @@ PushIOvHelper(struct iovec* vec, int* countp)
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6565
TMRstart(TMR_NNTPWRITE);
6666

67+
#if defined(HAVE_ZLIB)
68+
if (compression_layer_on) {
69+
int i;
70+
71+
for (i = 0; i < *countp; i++) {
72+
if (i+1 == *countp) {
73+
/* Time to flush the compressed output stream. */
74+
zstream_flush_needed = true;
75+
}
76+
write_buffer(vec[i].iov_base, vec[i].iov_len);
77+
}
78+
79+
*countp = 0;
80+
return;
81+
}
82+
#endif /* HAVE_ZLIB */
83+
6784
#ifdef HAVE_SASL
6885
if (sasl_conn && sasl_ssf) {
6986
int i;
@@ -196,6 +213,12 @@ static int highwater = 0;
196213
static void
197214
PushIOb(void)
198215
{
216+
#if defined(HAVE_ZLIB)
217+
/* Last line of a multi-line data block response.
218+
* Time to flush the compressed output stream. */
219+
zstream_flush_needed = true;
220+
#endif /* HAVE_ZLIB */
221+
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write_buffer(_IO_buffer_, highwater);
200223
highwater = 0;
201224
}

‎nnrpd/commands.c‎

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@@ -264,6 +264,14 @@ CMDauthinfo(int ac, char *av[])
264264
char errorstr[BIG_BUFFER];
265265
int code;
266266

267+
#if defined(HAVE_ZLIB)
268+
/* If a compression layer is active, AUTHINFO is not possible. */
269+
if (compression_layer_on && !tls_compression_on) {
270+
Reply("%d Already using a compression layer\r\n", NNTP_ERR_ACCESS);
271+
return;
272+
}
273+
#endif
274+
267275
if (strcasecmp(av[1], "GENERIC") == 0) {
268276
char *logrec = Glom(av);
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