It is just a hack to translate '! -i +' into a never matching nft rule,
but recognize it anyway for completeness' sake and to make xlate replay
test pass.
Signed-off-by: Phil Sutter <phil@xxxxxx>
---
iptables/nft-shared.c | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)
diff --git a/iptables/nft-shared.c b/iptables/nft-shared.c
index bcb6ada34e0fb..b7e073df5a270 100644
--- a/iptables/nft-shared.c
+++ b/iptables/nft-shared.c
@@ -359,6 +359,21 @@ static int parse_meta_pkttype(struct nft_xt_ctx *ctx, struct nftnl_expr *e)
return 0;
}
+static void parse_invalid_iface(char *iface, unsigned char *mask,
+ uint8_t *invflags, uint8_t invbit)
+{
+ if (*invflags & invbit || strcmp(iface, "INVAL/D"))
+ return;
+
+ /* nft's poor "! -o +" excuse */
+ *invflags |= invbit;
+ iface[0] = '+';
+ iface[1] = '\0';
+ mask[0] = 0xff;
+ mask[1] = 0xff;
+ memset(mask + 2, 0, IFNAMSIZ - 2);
+}
+
int parse_meta(struct nft_xt_ctx *ctx, struct nftnl_expr *e, uint8_t key,
char *iniface, unsigned char *iniface_mask,
char *outiface, unsigned char *outiface_mask, uint8_t *invflags)
@@ -393,6 +408,8 @@ int parse_meta(struct nft_xt_ctx *ctx, struct nftnl_expr *e, uint8_t key,
*invflags |= IPT_INV_VIA_IN;
parse_ifname(ifname, len, iniface, iniface_mask);
+ parse_invalid_iface(iniface, iniface_mask,
+ invflags, IPT_INV_VIA_IN);
break;
case NFT_META_BRI_OIFNAME:
case NFT_META_OIFNAME:
@@ -401,6 +418,8 @@ int parse_meta(struct nft_xt_ctx *ctx, struct nftnl_expr *e, uint8_t key,
*invflags |= IPT_INV_VIA_OUT;
parse_ifname(ifname, len, outiface, outiface_mask);
+ parse_invalid_iface(outiface, outiface_mask,
+ invflags, IPT_INV_VIA_OUT);
break;
case NFT_META_MARK:
parse_meta_mark(ctx, e);
--
2.38.0
