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| author | Harald Welte <laforge@netfilter.org> | 2005-10-10 20:52:19 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2005-10-10 20:52:19 -0700 |
| commit | ebe0bbf06c9e03613bdcb6b5a704595a9344b7ff (patch) | |
| tree | 33453cb2cd33095e3a226d0866bdfe1019473646 /net | |
| parent | f40863cec87464f3f4ec3a6c00e3fda3bbb0c91b (diff) | |
| download | op-kernel-dev-ebe0bbf06c9e03613bdcb6b5a704595a9344b7ff.zip op-kernel-dev-ebe0bbf06c9e03613bdcb6b5a704595a9344b7ff.tar.gz | |
[NETFILTER] nfnetlink: use highest bit of nfa_type to indicate nested TLV
As Henrik Nordstrom pointed out, all our efforts with "split endian" (i.e.
host byte order tags, net byte order values) are useless, unless a parser
can determine whether an attribute is nested or not.
This patch steals the highest bit of nfattr.nfa_type to indicate whether
the data payload contains a nested nfattr (1) or not (0).
This will break userspace compatibility, but luckily no kernel with
nfnetlink was released so far.
Signed-off-by: Harald Welte <laforge@netfilter.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
| -rw-r--r-- | net/netfilter/nfnetlink.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/net/netfilter/nfnetlink.c b/net/netfilter/nfnetlink.c index 1caaca0..4bc27a6 100644 --- a/net/netfilter/nfnetlink.c +++ b/net/netfilter/nfnetlink.c @@ -133,7 +133,7 @@ int nfattr_parse(struct nfattr *tb[], int maxattr, struct nfattr *nfa, int len) memset(tb, 0, sizeof(struct nfattr *) * maxattr); while (NFA_OK(nfa, len)) { - unsigned flavor = nfa->nfa_type; + unsigned flavor = NFA_TYPE(nfa); if (flavor && flavor <= maxattr) tb[flavor-1] = nfa; nfa = NFA_NEXT(nfa, len); @@ -177,7 +177,7 @@ nfnetlink_check_attributes(struct nfnetlink_subsystem *subsys, int attrlen = nlh->nlmsg_len - NLMSG_ALIGN(min_len); while (NFA_OK(attr, attrlen)) { - unsigned flavor = attr->nfa_type; + unsigned flavor = NFA_TYPE(attr); if (flavor) { if (flavor > attr_count) return -EINVAL; |
