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This patch introduces the generic object cache that is populated during the
evaluation phase.
The first client of this infrastructure are table objects. As a result, there
is a single call to netlink_list_tables().
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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nftables used to have a cache to speed up interface name <-> index lookup,
restore it using libmnl.
This reduces netlink traffic since if_nametoindex() and if_indextoname() open,
send a request, receive the list of interface and close a netlink socket for
each call. I think this is also good for consistency since nft -f will operate
with the same index number when reloading the ruleset.
The cache is populated by when nft_if_nametoindex() and nft_if_indextoname()
are used for first time. Then, it it released in the output path. In the
interactive mode, it is invalidated after each command.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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1) This removes former Makefiles and install-sh (which is now
automagically imported via autoreconf).
Makefile.defs.in
Makefile.in
Makefile.rules.in
src/Makefile.in
install-sh (now automagically imported via autoreconf).
2) CFLAGS are left almost same, they are integrated into Make_global.am.
Use AM_CPPFLAGS to set the CFLAGS set by pkgconfig.
3) Add m4 directory to the tree which only contains the .gitignore
file. Update .gitignore file to skip autogenerated files.
4) include <config.h> whenever required.
5) Minor adjustments to scanner.l and parser_bison.y to compile cleanly
with autotools.
6) Add %option outfile=lex.yy.c to scanner.l, otherwise I hit this error
here:
gcc -DHAVE_CONFIG_H -I. -I.. -I../include -DDEFAULT_INCLUDE_PATH="\"/usr/etc\"" -Wall -Wstrict-prototypes -Wmissing-prototypes -Wmissing-declarations -Wdeclaration-after-statement -Wsign-compare -Winit-self -Wformat-nonliteral -Wformat-security -Wmissing-format-attribute -Wcast-align -Wundef -Wbad-function-cast -g -O2 -MT mnl.o -MD -MP -MF $depbase.Tpo -c -o mnl.o mnl.c &&\
mv -f $depbase.Tpo $depbase.Po
/bin/sh ../build-aux/ylwrap scanner.l lex.yy.c scanner.c -- flex
make[3]: *** [scanner.c] Error 1
make[3]: Leaving directory `/home/pablo/devel/scm/git-netfilter/nftables/src'
make[2]: *** [all] Error 2
make[2]: Leaving directory `/home/pablo/devel/scm/git-netfilter/nftables/src'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/home/pablo/devel/scm/git-netfilter/nftables'
make: *** [all] Error 2
7) Add Makefile.am for include/ (contributed by Giorgio Dal Molin).
The doc/ and files/ conversion to automake will come in follow up
patches but 'make distcheck' already works.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Needed by follow up patches to use autotools.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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When try to input multiline command in "nft -i", it crashes.
Issue is, function cli_append_multiline() return null in case of
multiline command. But in the calling function cli_complete(),
cli_exit is getting called, which in turn calls
rl_callback_handler_remove() and the handler is getting removed.
[root@localhost ~]# nft -i
nft> add table filter
nft> list table \
readline: readline_callback_read_char() called with no handler!
Aborted (core dumped)
[root@localhost ~]#
After this patch, it shows:
nft> list table \
.... filter
table ip filter {
}
nft>
The ".... " prompt is used to indicate a multiline command, similar to
what Python does.
Signed-off-by: Guruswamy Basavaiah <guru2018@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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The terminal was not correctly resetted when CTRL+d was pressed.
The result was that reset has to be called from shell after exit.
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This patch adds missing code to get basic interactive mode
operative via `nft -i', including parsing, evaluation,
command execution via netlink and error reporting.
Autocomplete is not yet implemented.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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