* [PATCH libnftnl] flowtable: relax logic to build NFTA_FLOWTABLE_HOOK
@ 2020-05-25 16:18 Pablo Neira Ayuso
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From: Pablo Neira Ayuso @ 2020-05-25 16:18 UTC (permalink / raw)
To: netfilter-devel
The logic to build NFTA_FLOWTABLE_HOOK enforces the presence of the hook
number and priority to include the devices. Relax this to allow for
incremental device updates.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
src/flowtable.c | 31 +++++++++++++++++++------------
1 file changed, 19 insertions(+), 12 deletions(-)
diff --git a/src/flowtable.c b/src/flowtable.c
index 19e288247e34..658115dd2476 100644
--- a/src/flowtable.c
+++ b/src/flowtable.c
@@ -313,31 +313,38 @@ EXPORT_SYMBOL(nftnl_flowtable_nlmsg_build_payload);
void nftnl_flowtable_nlmsg_build_payload(struct nlmsghdr *nlh,
const struct nftnl_flowtable *c)
{
+ struct nlattr *nest = NULL;
int i;
if (c->flags & (1 << NFTNL_FLOWTABLE_TABLE))
mnl_attr_put_strz(nlh, NFTA_FLOWTABLE_TABLE, c->table);
if (c->flags & (1 << NFTNL_FLOWTABLE_NAME))
mnl_attr_put_strz(nlh, NFTA_FLOWTABLE_NAME, c->name);
- if ((c->flags & (1 << NFTNL_FLOWTABLE_HOOKNUM)) &&
- (c->flags & (1 << NFTNL_FLOWTABLE_PRIO))) {
- struct nlattr *nest;
+ if (c->flags & (1 << NFTNL_FLOWTABLE_HOOKNUM) ||
+ c->flags & (1 << NFTNL_FLOWTABLE_PRIO) ||
+ c->flags & (1 << NFTNL_FLOWTABLE_DEVICES))
nest = mnl_attr_nest_start(nlh, NFTA_FLOWTABLE_HOOK);
+
+ if (c->flags & (1 << NFTNL_FLOWTABLE_HOOKNUM))
mnl_attr_put_u32(nlh, NFTA_FLOWTABLE_HOOK_NUM, htonl(c->hooknum));
+ if (c->flags & (1 << NFTNL_FLOWTABLE_PRIO))
mnl_attr_put_u32(nlh, NFTA_FLOWTABLE_HOOK_PRIORITY, htonl(c->prio));
- if (c->flags & (1 << NFTNL_FLOWTABLE_DEVICES)) {
- struct nlattr *nest_dev;
- nest_dev = mnl_attr_nest_start(nlh,
- NFTA_FLOWTABLE_HOOK_DEVS);
- for (i = 0; i < c->dev_array_len; i++)
- mnl_attr_put_strz(nlh, NFTA_DEVICE_NAME,
- c->dev_array[i]);
- mnl_attr_nest_end(nlh, nest_dev);
+ if (c->flags & (1 << NFTNL_FLOWTABLE_DEVICES)) {
+ struct nlattr *nest_dev;
+
+ nest_dev = mnl_attr_nest_start(nlh, NFTA_FLOWTABLE_HOOK_DEVS);
+ for (i = 0; i < c->dev_array_len; i++) {
+ mnl_attr_put_strz(nlh, NFTA_DEVICE_NAME,
+ c->dev_array[i]);
}
- mnl_attr_nest_end(nlh, nest);
+ mnl_attr_nest_end(nlh, nest_dev);
}
+
+ if (nest)
+ mnl_attr_nest_end(nlh, nest);
+
if (c->flags & (1 << NFTNL_FLOWTABLE_FLAGS))
mnl_attr_put_u32(nlh, NFTA_FLOWTABLE_FLAGS, htonl(c->ft_flags));
if (c->flags & (1 << NFTNL_FLOWTABLE_USE))
--
2.20.1
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