From 71fb4e3be07548216a831dda28f4aedfc37b2df1 Mon Sep 17 00:00:00 2001
From: Phil Sutter <psutter@redhat.com>
Date: Thu, 9 Feb 2023 10:27:58 +0100
Subject: [PATCH] evaluate: search stacked header list for matching payload dep
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2094887
Upstream Status: nftables commit 87c3041bfd244
commit 87c3041bfd244aaf39e644d33c0df4fe04079e1c
Author: Florian Westphal <fw@strlen.de>
Date: Mon Jul 25 20:02:28 2022 +0200
evaluate: search stacked header list for matching payload dep
"ether saddr 0:1:2:3:4:6 vlan id 2" works, but reverse fails:
"vlan id 2 ether saddr 0:1:2:3:4:6" will give
Error: conflicting protocols specified: vlan vs. ether
After "proto: track full stack of seen l2 protocols, not just cumulative offset",
we have a list of all l2 headers, so search those to see if we had this
proto base in the past before rejecting this.
Reported-by: Eric Garver <eric@garver.life>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Phil Sutter <psutter@redhat.com>
---
src/evaluate.c | 21 +++++++---
tests/py/bridge/vlan.t | 3 ++
tests/py/bridge/vlan.t.json | 56 +++++++++++++++++++++++++++
tests/py/bridge/vlan.t.payload | 16 ++++++++
tests/py/bridge/vlan.t.payload.netdev | 20 ++++++++++
5 files changed, 110 insertions(+), 6 deletions(-)
diff --git a/src/evaluate.c b/src/evaluate.c
index 9246064..d67f915 100644
--- a/src/evaluate.c
+++ b/src/evaluate.c
@@ -659,13 +659,22 @@ static int resolve_protocol_conflict(struct eval_ctx *ctx,
struct stmt *nstmt = NULL;
int link, err;
- if (payload->payload.base == PROTO_BASE_LL_HDR &&
- proto_is_dummy(desc)) {
- err = meta_iiftype_gen_dependency(ctx, payload, &nstmt);
- if (err < 0)
- return err;
+ if (payload->payload.base == PROTO_BASE_LL_HDR) {
+ if (proto_is_dummy(desc)) {
+ err = meta_iiftype_gen_dependency(ctx, payload, &nstmt);
+ if (err < 0)
+ return err;
- rule_stmt_insert_at(ctx->rule, nstmt, ctx->stmt);
+ rule_stmt_insert_at(ctx->rule, nstmt, ctx->stmt);
+ } else {
+ unsigned int i;
+
+ /* payload desc stored in the L2 header stack? No conflict. */
+ for (i = 0; i < ctx->pctx.stacked_ll_count; i++) {
+ if (ctx->pctx.stacked_ll[i] == payload->payload.desc)
+ return 0;
+ }
+ }
}
assert(base <= PROTO_BASE_MAX);
diff --git a/tests/py/bridge/vlan.t b/tests/py/bridge/vlan.t
index 924ed4e..4920601 100644
--- a/tests/py/bridge/vlan.t
+++ b/tests/py/bridge/vlan.t
@@ -47,3 +47,6 @@ ether type ip vlan id 1 ip saddr 10.0.0.1;fail
# mangling
vlan id 1 vlan id set 2;ok
+
+ether saddr 00:01:02:03:04:05 vlan id 1;ok
+vlan id 2 ether saddr 0:1:2:3:4:6;ok;ether saddr 00:01:02:03:04:06 vlan id 2
diff --git a/tests/py/bridge/vlan.t.json b/tests/py/bridge/vlan.t.json
index e7640f9..58d4a40 100644
--- a/tests/py/bridge/vlan.t.json
+++ b/tests/py/bridge/vlan.t.json
@@ -761,3 +761,59 @@
}
}
]
+
+# ether saddr 00:01:02:03:04:05 vlan id 1
+[
+ {
+ "match": {
+ "left": {
+ "payload": {
+ "field": "saddr",
+ "protocol": "ether"
+ }
+ },
+ "op": "==",
+ "right": "00:01:02:03:04:05"
+ }
+ },
+ {
+ "match": {
+ "left": {
+ "payload": {
+ "field": "id",
+ "protocol": "vlan"
+ }
+ },
+ "op": "==",
+ "right": 1
+ }
+ }
+]
+
+# vlan id 2 ether saddr 0:1:2:3:4:6
+[
+ {
+ "match": {
+ "left": {
+ "payload": {
+ "field": "saddr",
+ "protocol": "ether"
+ }
+ },
+ "op": "==",
+ "right": "00:01:02:03:04:06"
+ }
+ },
+ {
+ "match": {
+ "left": {
+ "payload": {
+ "field": "id",
+ "protocol": "vlan"
+ }
+ },
+ "op": "==",
+ "right": 2
+ }
+ }
+]
diff --git a/tests/py/bridge/vlan.t.payload b/tests/py/bridge/vlan.t.payload
index 6c8d595..713670e 100644
--- a/tests/py/bridge/vlan.t.payload
+++ b/tests/py/bridge/vlan.t.payload
@@ -276,3 +276,19 @@ bridge
[ payload load 2b @ link header + 14 => reg 1 ]
[ bitwise reg 1 = ( reg 1 & 0x000000f0 ) ^ 0x00000200 ]
[ payload write reg 1 => 2b @ link header + 14 csum_type 0 csum_off 0 csum_flags 0x0 ]
+
+# ether saddr 00:01:02:03:04:05 vlan id 1
+bridge test-bridge input
+ [ payload load 8b @ link header + 6 => reg 1 ]
+ [ cmp eq reg 1 0x03020100 0x00810504 ]
+ [ payload load 2b @ link header + 14 => reg 1 ]
+ [ bitwise reg 1 = ( reg 1 & 0x0000ff0f ) ^ 0x00000000 ]
+ [ cmp eq reg 1 0x00000100 ]
+
+# vlan id 2 ether saddr 0:1:2:3:4:6
+bridge test-bridge input
+ [ payload load 8b @ link header + 6 => reg 1 ]
+ [ cmp eq reg 1 0x03020100 0x00810604 ]
+ [ payload load 2b @ link header + 14 => reg 1 ]
+ [ bitwise reg 1 = ( reg 1 & 0x0000ff0f ) ^ 0x00000000 ]
+ [ cmp eq reg 1 0x00000200 ]
diff --git a/tests/py/bridge/vlan.t.payload.netdev b/tests/py/bridge/vlan.t.payload.netdev
index d2c7d74..98a2a2b 100644
--- a/tests/py/bridge/vlan.t.payload.netdev
+++ b/tests/py/bridge/vlan.t.payload.netdev
@@ -322,3 +322,23 @@ netdev
[ payload load 2b @ link header + 14 => reg 1 ]
[ bitwise reg 1 = ( reg 1 & 0x000000f0 ) ^ 0x00000200 ]
[ payload write reg 1 => 2b @ link header + 14 csum_type 0 csum_off 0 csum_flags 0x0 ]
+
+# vlan id 2 ether saddr 0:1:2:3:4:6
+netdev test-netdev ingress
+ [ meta load iiftype => reg 1 ]
+ [ cmp eq reg 1 0x00000001 ]
+ [ payload load 8b @ link header + 6 => reg 1 ]
+ [ cmp eq reg 1 0x03020100 0x00810604 ]
+ [ payload load 2b @ link header + 14 => reg 1 ]
+ [ bitwise reg 1 = ( reg 1 & 0x0000ff0f ) ^ 0x00000000 ]
+ [ cmp eq reg 1 0x00000200 ]
+
+# ether saddr 00:01:02:03:04:05 vlan id 1
+netdev test-netdev ingress
+ [ meta load iiftype => reg 1 ]
+ [ cmp eq reg 1 0x00000001 ]
+ [ payload load 8b @ link header + 6 => reg 1 ]
+ [ cmp eq reg 1 0x03020100 0x00810504 ]
+ [ payload load 2b @ link header + 14 => reg 1 ]
+ [ bitwise reg 1 = ( reg 1 & 0x0000ff0f ) ^ 0x00000000 ]
+ [ cmp eq reg 1 0x00000100 ]
--
2.39.1