| Commit message (Collapse) | Author | Age | Files | Lines |
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Use a shorter name for this, morever this can be used from sets so the _rule_
is misleading.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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So we can use the nft_* prefix anytime soon for our upcoming higher level
library.
After this patch, the nft_* symbols become an alias of the nftnl_* symbols.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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We cannot use __attribute__((constructor)) to register the supported
expressions in runtime when the library is statically linked. This lead
us to some explicit libnftnl_init() function that needs to be called
from the main() function of the client program.
This patch reverts 4dd0772 ("expr: use __attribute__((constructor)) to
register expression").
Reported-by: Laurent Bercot <ska-devel@skarnet.org>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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The internal.h file started being a small file with private definitions.
Its size has been increasing over time more and more, so let's split
this in small header files that map to the corresponding class where the
functions belong to.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Add new buffer class to consolidate the existing code to export objects
in XML/JSON and use it. We save ~700 LOC with this change.
The rule and set objects are not yet consolidated. It seems this would
require some specific glue code per representation type since lists are
arranged differently.
This also consolidates the tag names, so we make sure the same are used
from XML and JSON by placing them in include/buffer.h.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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If the kernel sends us different data length for a given attribute,
stop further processing and indicate that an ABI breakage has ocurred.
This is an example of the (hypothetical) message that is shown in that
case:
nf_tables kernel ABI is broken, contact your vendor.
table.c:214 reason: Numerical result out of range
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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It changes the parse functions to omit unset values.
Signed-off-by: Ana Rey <anarey@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Code refactoring to delete correctly the last comma character in json text.
Signed-off-by: Ana Rey <anarey@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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It changes the parse and snprintf functions to omit unset values.
Signed-off-by: Ana Rey <anarey@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Code refactoring to use nft_rule_expr_set_* in parse functions
Signed-off-by: Ana Rey <anarey@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Signed-off-by: Florian Westphal <fw@strlen.de>
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This patch includes changes to adapt this branch to the library
rename that happened in the master branch.
Conflicts:
src/Makefile.am
src/expr/cmp.c
src/expr/ct.c
src/expr/data_reg.c
src/expr/meta.c
tests/jsonfiles/01-table.json
tests/jsonfiles/02-table.json
tests/jsonfiles/64-ruleset.json
tests/xmlfiles/01-table.xml
tests/xmlfiles/02-table.xml
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We plan to use this library name for the higher layer library.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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CC expr/ct.lo
expr/ct.c:194:12: warning: 'str2ctdir' defined but not used [-Wunused-function]
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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This patch implements a string to represent directions in the CT expression:
* original (0)
* reply (1)
Signed-off-by: Arturo Borrero Gonzalez <arturo.borrero.glez@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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The 'dir' attribute is optional as stated in the kernel sources.
Previous to this patch, using XML/JSON to manage this expr produces some
undefined and erroneous behaviours.
While at it, fix also the default output format.
Signed-off-by: Arturo Borrero Gonzalez <arturo.borrero.glez@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Due to missing NFT_CT_L3PROTOCOL key in ctkey2str_array, a segfault is
produced when the str2ctkey() loop reaches that position, since strcmp()
will try to compare a NULL value.
Signed-off-by: Arturo Borrero Gonzalez <arturo.borrero.glez@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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There are some cases where a reg is not mandatory, for example:
* dreg in lookup
* dreg/sreg in meta (last version)
So, lets change the function nft_mxml_reg_parse() to add
an optional/mandatory flag.
dreg in lookup is optional as stated at:
net/netfilter/nft_lookup.c:nft_lookup_init()
Signed-off-by: Arturo Borrero Gonzalez <arturo.borrero.glez@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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This patch fixes the incorrect data type (from uint8_t to uint32_t) in
several private data area of the expressions.
It also cleans up this by translating several unsigned int to uint32_t.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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I have added a new structure for reporting some errors in parser
that we can't cover with errno.
In this patch, we have three errors that we can't cover with errno:
NFT_PARSE_EBADINPUT : Bad XML/JSON format in the input
NFT_PARSE_EMISSINGNODE : Missing node in our input
NFT_PARSE_EBADTYPE : Wrong type value in a node
Signed-off-by: Alvaro Neira Ayuso <alvaroneay@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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This patch adds userspace support for setting properties of tracked connections.
Currently, the connection mark is supported. This can be used to implemented the
same functionality as iptables -j CONNMARK --save-mark.
Signed-off-by: Kristian Evensen <kristian.evensen@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Unify parse and output types that are redundant to all
existing nftables objects. Thus, all NFT_*_O_[XML|JSON|DEFAULT]
are merged into NFT_OUTPUT_[JSON|XML] and NFT_PARSE_[JSON|XML].
Signed-off-by: Alvaro Neira Ayuso <alvaroneay@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Remove all the spaces from the JSON output to reduce the size
of the output string, this also provides a consistent output
in table, chain, rule and set.
As Stephen Hemminger suggested, better to squash the output to
consume as less bytes as possible.
Signed-off-by: Alvaro Neira Ayuso <alvaroneay@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Use 'len' instead of 'size' since we need the remaining unused bytes
in the buffer, not its total size.
Signed-off-by: Arturo Borrero Gonzalez <arturo.borrero.glez@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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This patch breaks the ABI to shrink the size parameter from 8
to 4 bytes in x86_64. The maximum length of netlink attributes
is 2 bytes, so 4 bytes as attribute payload length should be
enough.
After this patch, size_t is only used in the nft_*_snprintf
interfaces.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Add an optional/mandatory flag to XML parsing.
In some elements (ie regs), no flag is used because is always mandatory.
DATA_NONE is created to indicate a non-parsed data_reg.
Signed-off-by: Arturo Borrero Gonzalez <arturo.borrero.glez@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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This patch is a cleanup to save LOC.
I have also changed it to use < 0 to check for error conditions.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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This patch is a cleanup to save LOC.
I have also changed it to use < 0 to check for error conditions.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Remove _value_ infix to make the function name smaller.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Add function for parsing rules in JSON format
Signed-off-by: Alvaro Neira Ayuso <alvaroneay@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Display direction and key if available
Signed-off-by: Alvaro Neira Ayuso Ayuso <alvaroneay@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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That function already sets errno for us.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Replace existing code to use this function.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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This patch moves common XML parsing code to nft_mxml_num_parse().
To handle this, the nft_strtoi() helper fuction is included.
I've changed some MXML_DESCEND[_FIRST] flags to avoid match a nested node under
some circumstances, ie, matching two nodes with the same name that are descendant.
Signed-off-by: Arturo Borrero Gonzalez <arturo.borrero.glez@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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This patch refactors the getter code to simplify it. The default
cases have been removed so gcc will spot a warning if an attribute
is not handled appropriately.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Instead of manual array registration.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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This patch improves default plain text output by mimicing the
default output of libnl-nft.
While at it, several %lu has been translated to use %"PRIu64"
for correctness.
[ I have added the policy to string translation --pablo ]
Signed-off-by: Giuseppe Longo <giuseppelng@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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This patch reduces the XML code in 100 LOC.
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Move common code for XML parsing of expressions to the new
nft_mxml_expr_parse function.
This patch reduces the XML parsing code in 300 LOC.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Signed-off-by: Arturo Borrero Gonzalez <arturo.borrero.glez@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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While at it, order possible switch cases of _snprintf.
Signed-off-by: Alvaro Neira Ayuso <alvaroneay@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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ct expr uses a string instead of a numerical one in the <key> node.
Signed-off-by: Arturo Borrero Gonzalez <arturo.borrero.glez@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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This patch adds an extra dir check.
0 means original.
1 means a reply.
Pablo decided not to include nf_conntrack_tuple_common.h, instead internally
defined them.
Signed-off-by: Arturo Borrero Gonzalez <arturo.borrero.glez@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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With this patch, all expressions validate that registers are <= NFT_REG_MAX.
Signed-off-by: Arturo Borrero Gonzalez <arturo.borrero.glez@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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This patch adds the ct expression.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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