From: Florian Westphal <fw@strlen.de>
Date: Fri, 29 Apr 2022 18:32:37 +0000 (+0200)
Subject: netlink: swap byteorder for host-endian concat data
X-Git-Tag: v1.0.3~7
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=806ab081dc9ae3ea313ae9e471ee1c97c7a9e2ad;p=thirdparty%2Fnftables.git

netlink: swap byteorder for host-endian concat data

All data must be passed in network byte order, else matching
won't work respectively kernel will reject the interval because
it thinks that start is after end

This is needed to allow use of 'ppp*' in interval sets with
concatenations.

Signed-off-by: Florian Westphal <fw@strlen.de>
---

diff --git a/src/netlink.c b/src/netlink.c
index 240c937e..89d864ed 100644
--- a/src/netlink.c
+++ b/src/netlink.c
@@ -259,6 +259,10 @@ static int netlink_gen_concat_data_expr(int end, const struct expr *i,
 			mpz_t v;
 
 			mpz_init_bitmask(v, i->len - i->prefix_len);
+
+			if (i->byteorder == BYTEORDER_HOST_ENDIAN)
+				mpz_switch_byteorder(v, i->len / BITS_PER_BYTE);
+
 			mpz_add(v, i->prefix->value, v);
 			count = netlink_export_pad(data, v, i);
 			mpz_clear(v);