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These functions allow to create a buffer (struct nftnl_udata_buf) of
user data attributes in TLV format (struct nftnl_udata). It is inspired
by libmnl/src/attr.c. It can be used to store several TLVs sequentially
into an object.
Example:
struct nftnl_udata_buf *buf;
struct nftnl_udata *attr;
const char *str = "Hello World!";
buf = nftnl_udata_buf_alloc(UDATA_SIZE);
if (!buf) {
perror("OOM");
exit(EXIT_FAILURE);
}
if (!nftnl_udata_put_strz(buf, MY_TYPE, str)) {
perror("Can't put attribute \"%s\"", str);
exit(EXIT_FAILURE);
}
nftnl_udata_for_each(buf, attr)
printf("%s\n", (char *)nftnl_udata_attr_value(attr));
nftnl_udata_buf_free(buf);
Signed-off-by: Carlos Falgueras García <carlosfg@riseup.net>
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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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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It adds support for table, chain and rule handling.
This also includes expression handling for each rule.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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