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From 6aef90100bebe2b00d4edffe59fb9c43643816de Mon Sep 17 00:00:00 2001
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From: Phil Sutter <phil@nwl.cc>
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Date: Tue, 10 Nov 2020 14:50:46 +0100
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Subject: [PATCH] tests/shell: Add test for bitwise avoidance fixes
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Masked address matching was recently improved to avoid bitwise
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expression if the given mask covers full bytes. Make use of nft netlink
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debug output to assert iptables-nft generates the right bytecode for
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each situation.
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Signed-off-by: Phil Sutter <phil@nwl.cc>
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(cherry picked from commit 81a2e128512837b53e5b9ea501b6c8dc64eeca78)
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Signed-off-by: Phil Sutter <psutter@redhat.com>
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---
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.../nft-only/0009-needless-bitwise_0 | 339 ++++++++++++++++++
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1 file changed, 339 insertions(+)
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create mode 100755 iptables/tests/shell/testcases/nft-only/0009-needless-bitwise_0
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diff --git a/iptables/tests/shell/testcases/nft-only/0009-needless-bitwise_0 b/iptables/tests/shell/testcases/nft-only/0009-needless-bitwise_0
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new file mode 100755
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index 0000000000000..c5c6e706a1029
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--- /dev/null
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+++ b/iptables/tests/shell/testcases/nft-only/0009-needless-bitwise_0
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@@ -0,0 +1,339 @@
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+#!/bin/bash -x
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+
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+[[ $XT_MULTI == *xtables-nft-multi ]] || { echo "skip $XT_MULTI"; exit 0; }
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+set -e
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+
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+nft flush ruleset
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+
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+(
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+ echo "*filter"
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+ for plen in "" 32 30 24 16 8 0; do
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+ addr="10.1.2.3${plen:+/}$plen"
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+ echo "-A OUTPUT -d $addr"
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+ done
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+ echo "COMMIT"
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+) | $XT_MULTI iptables-restore
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+
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+(
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+ echo "*filter"
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+ for plen in "" 128 124 120 112 88 80 64 48 16 8 0; do
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+ addr="feed:c0ff:ee00:0102:0304:0506:0708:090A${plen:+/}$plen"
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+ echo "-A OUTPUT -d $addr"
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+ done
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+ echo "COMMIT"
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+) | $XT_MULTI ip6tables-restore
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+
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+masks="
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+ff:ff:ff:ff:ff:ff
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+ff:ff:ff:ff:ff:f0
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+ff:ff:ff:ff:ff:00
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+ff:ff:ff:ff:00:00
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+ff:ff:ff:00:00:00
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+ff:ff:00:00:00:00
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+ff:00:00:00:00:00
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+"
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+(
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+ echo "*filter"
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+ for plen in "" 32 30 24 16 8 0; do
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+ addr="10.1.2.3${plen:+/}$plen"
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+ echo "-A OUTPUT -d $addr"
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+ done
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+ for mask in $masks; do
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+ echo "-A OUTPUT --destination-mac fe:ed:00:c0:ff:ee/$mask"
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+ done
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+ echo "COMMIT"
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+) | $XT_MULTI arptables-restore
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+
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+(
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+ echo "*filter"
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+ for mask in $masks; do
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+ echo "-A OUTPUT -d fe:ed:00:c0:ff:ee/$mask"
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+ done
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+ echo "COMMIT"
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+) | $XT_MULTI ebtables-restore
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+
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+EXPECT="ip filter OUTPUT 4
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+ [ payload load 4b @ network header + 16 => reg 1 ]
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+ [ cmp eq reg 1 0x0302010a ]
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+ [ counter pkts 0 bytes 0 ]
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+
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+ip filter OUTPUT 5 4
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+ [ payload load 4b @ network header + 16 => reg 1 ]
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+ [ cmp eq reg 1 0x0302010a ]
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+ [ counter pkts 0 bytes 0 ]
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+
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+ip filter OUTPUT 6 5
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+ [ payload load 4b @ network header + 16 => reg 1 ]
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+ [ bitwise reg 1 = (reg=1 & 0xfcffffff ) ^ 0x00000000 ]
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+ [ cmp eq reg 1 0x0002010a ]
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+ [ counter pkts 0 bytes 0 ]
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+
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+ip filter OUTPUT 7 6
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+ [ payload load 3b @ network header + 16 => reg 1 ]
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+ [ cmp eq reg 1 0x0002010a ]
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+ [ counter pkts 0 bytes 0 ]
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+
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+ip filter OUTPUT 8 7
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+ [ payload load 2b @ network header + 16 => reg 1 ]
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+ [ cmp eq reg 1 0x0000010a ]
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+ [ counter pkts 0 bytes 0 ]
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+
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+ip filter OUTPUT 9 8
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+ [ payload load 1b @ network header + 16 => reg 1 ]
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+ [ cmp eq reg 1 0x0000000a ]
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+ [ counter pkts 0 bytes 0 ]
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+
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+ip filter OUTPUT 10 9
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+ [ counter pkts 0 bytes 0 ]
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+
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+ip6 filter OUTPUT 4
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+ [ payload load 16b @ network header + 24 => reg 1 ]
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+ [ cmp eq reg 1 0xffc0edfe 0x020100ee 0x06050403 0x0a090807 ]
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+ [ counter pkts 0 bytes 0 ]
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+
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+ip6 filter OUTPUT 5 4
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+ [ payload load 16b @ network header + 24 => reg 1 ]
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+ [ cmp eq reg 1 0xffc0edfe 0x020100ee 0x06050403 0x0a090807 ]
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+ [ counter pkts 0 bytes 0 ]
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+
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+ip6 filter OUTPUT 6 5
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+ [ payload load 16b @ network header + 24 => reg 1 ]
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+ [ bitwise reg 1 = (reg=1 & 0xffffffff 0xffffffff 0xffffffff 0xf0ffffff ) ^ 0x00000000 0x00000000 0x00000000 0x00000000 ]
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+ [ cmp eq reg 1 0xffc0edfe 0x020100ee 0x06050403 0x00090807 ]
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+ [ counter pkts 0 bytes 0 ]
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+
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+ip6 filter OUTPUT 7 6
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+ [ payload load 15b @ network header + 24 => reg 1 ]
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+ [ cmp eq reg 1 0xffc0edfe 0x020100ee 0x06050403 0x00090807 ]
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+ [ counter pkts 0 bytes 0 ]
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+
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+ip6 filter OUTPUT 8 7
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+ [ payload load 14b @ network header + 24 => reg 1 ]
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+ [ cmp eq reg 1 0xffc0edfe 0x020100ee 0x06050403 0x00000807 ]
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+ [ counter pkts 0 bytes 0 ]
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+
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+ip6 filter OUTPUT 9 8
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+ [ payload load 11b @ network header + 24 => reg 1 ]
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+ [ cmp eq reg 1 0xffc0edfe 0x020100ee 0x00050403 ]
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+ [ counter pkts 0 bytes 0 ]
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+
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+ip6 filter OUTPUT 10 9
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+ [ payload load 10b @ network header + 24 => reg 1 ]
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+ [ cmp eq reg 1 0xffc0edfe 0x020100ee 0x00000403 ]
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+ [ counter pkts 0 bytes 0 ]
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+
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+ip6 filter OUTPUT 11 10
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+ [ payload load 8b @ network header + 24 => reg 1 ]
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+ [ cmp eq reg 1 0xffc0edfe 0x020100ee ]
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+ [ counter pkts 0 bytes 0 ]
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+
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+ip6 filter OUTPUT 12 11
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+ [ payload load 6b @ network header + 24 => reg 1 ]
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+ [ cmp eq reg 1 0xffc0edfe 0x000000ee ]
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+ [ counter pkts 0 bytes 0 ]
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+
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+ip6 filter OUTPUT 13 12
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+ [ payload load 2b @ network header + 24 => reg 1 ]
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+ [ cmp eq reg 1 0x0000edfe ]
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+ [ counter pkts 0 bytes 0 ]
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+
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+ip6 filter OUTPUT 14 13
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+ [ payload load 1b @ network header + 24 => reg 1 ]
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+ [ cmp eq reg 1 0x000000fe ]
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+ [ counter pkts 0 bytes 0 ]
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+
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+ip6 filter OUTPUT 15 14
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+ [ counter pkts 0 bytes 0 ]
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+
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+arp filter OUTPUT 3
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+ [ payload load 2b @ network header + 0 => reg 1 ]
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+ [ cmp eq reg 1 0x00000100 ]
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+ [ payload load 1b @ network header + 4 => reg 1 ]
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+ [ cmp eq reg 1 0x00000006 ]
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+ [ payload load 1b @ network header + 5 => reg 1 ]
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+ [ cmp eq reg 1 0x00000004 ]
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+ [ payload load 4b @ network header + 24 => reg 1 ]
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+ [ cmp eq reg 1 0x0302010a ]
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+ [ counter pkts 0 bytes 0 ]
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+
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+arp filter OUTPUT 4 3
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+ [ payload load 2b @ network header + 0 => reg 1 ]
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+ [ cmp eq reg 1 0x00000100 ]
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+ [ payload load 1b @ network header + 4 => reg 1 ]
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+ [ cmp eq reg 1 0x00000006 ]
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+ [ payload load 1b @ network header + 5 => reg 1 ]
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+ [ cmp eq reg 1 0x00000004 ]
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+ [ payload load 4b @ network header + 24 => reg 1 ]
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+ [ cmp eq reg 1 0x0302010a ]
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+ [ counter pkts 0 bytes 0 ]
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+
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+arp filter OUTPUT 5 4
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+ [ payload load 2b @ network header + 0 => reg 1 ]
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+ [ cmp eq reg 1 0x00000100 ]
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+ [ payload load 1b @ network header + 4 => reg 1 ]
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+ [ cmp eq reg 1 0x00000006 ]
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+ [ payload load 1b @ network header + 5 => reg 1 ]
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+ [ cmp eq reg 1 0x00000004 ]
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+ [ payload load 4b @ network header + 24 => reg 1 ]
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+ [ bitwise reg 1 = (reg=1 & 0xfcffffff ) ^ 0x00000000 ]
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+ [ cmp eq reg 1 0x0002010a ]
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+ [ counter pkts 0 bytes 0 ]
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+
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+arp filter OUTPUT 6 5
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+ [ payload load 2b @ network header + 0 => reg 1 ]
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+ [ cmp eq reg 1 0x00000100 ]
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+ [ payload load 1b @ network header + 4 => reg 1 ]
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+ [ cmp eq reg 1 0x00000006 ]
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+ [ payload load 1b @ network header + 5 => reg 1 ]
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+ [ cmp eq reg 1 0x00000004 ]
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+ [ payload load 3b @ network header + 24 => reg 1 ]
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+ [ cmp eq reg 1 0x0002010a ]
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+ [ counter pkts 0 bytes 0 ]
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+
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+arp filter OUTPUT 7 6
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+ [ payload load 2b @ network header + 0 => reg 1 ]
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+ [ cmp eq reg 1 0x00000100 ]
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+ [ payload load 1b @ network header + 4 => reg 1 ]
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+ [ cmp eq reg 1 0x00000006 ]
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+ [ payload load 1b @ network header + 5 => reg 1 ]
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+ [ cmp eq reg 1 0x00000004 ]
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+ [ payload load 2b @ network header + 24 => reg 1 ]
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+ [ cmp eq reg 1 0x0000010a ]
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+ [ counter pkts 0 bytes 0 ]
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+
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+arp filter OUTPUT 8 7
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+ [ payload load 2b @ network header + 0 => reg 1 ]
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+ [ cmp eq reg 1 0x00000100 ]
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+ [ payload load 1b @ network header + 4 => reg 1 ]
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+ [ cmp eq reg 1 0x00000006 ]
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+ [ payload load 1b @ network header + 5 => reg 1 ]
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+ [ cmp eq reg 1 0x00000004 ]
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+ [ payload load 1b @ network header + 24 => reg 1 ]
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+ [ cmp eq reg 1 0x0000000a ]
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+ [ counter pkts 0 bytes 0 ]
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+
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+arp filter OUTPUT 9 8
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+ [ payload load 2b @ network header + 0 => reg 1 ]
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+ [ cmp eq reg 1 0x00000100 ]
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+ [ payload load 1b @ network header + 4 => reg 1 ]
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+ [ cmp eq reg 1 0x00000006 ]
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+ [ payload load 1b @ network header + 5 => reg 1 ]
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+ [ cmp eq reg 1 0x00000004 ]
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+ [ counter pkts 0 bytes 0 ]
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+
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+arp filter OUTPUT 10 9
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+ [ payload load 2b @ network header + 0 => reg 1 ]
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+ [ cmp eq reg 1 0x00000100 ]
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+ [ payload load 1b @ network header + 4 => reg 1 ]
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87db66 |
+ [ cmp eq reg 1 0x00000006 ]
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+ [ payload load 1b @ network header + 5 => reg 1 ]
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87db66 |
+ [ cmp eq reg 1 0x00000004 ]
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+ [ payload load 6b @ network header + 18 => reg 1 ]
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87db66 |
+ [ cmp eq reg 1 0xc000edfe 0x0000eeff ]
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+ [ counter pkts 0 bytes 0 ]
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87db66 |
+
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+arp filter OUTPUT 11 10
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+ [ payload load 2b @ network header + 0 => reg 1 ]
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+ [ cmp eq reg 1 0x00000100 ]
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87db66 |
+ [ payload load 1b @ network header + 4 => reg 1 ]
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87db66 |
+ [ cmp eq reg 1 0x00000006 ]
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87db66 |
+ [ payload load 1b @ network header + 5 => reg 1 ]
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87db66 |
+ [ cmp eq reg 1 0x00000004 ]
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87db66 |
+ [ payload load 6b @ network header + 18 => reg 1 ]
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+ [ bitwise reg 1 = (reg=1 & 0xffffffff 0x0000f0ff ) ^ 0x00000000 0x00000000 ]
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+ [ cmp eq reg 1 0xc000edfe 0x0000e0ff ]
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+ [ counter pkts 0 bytes 0 ]
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87db66 |
+
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+arp filter OUTPUT 12 11
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+ [ payload load 2b @ network header + 0 => reg 1 ]
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+ [ cmp eq reg 1 0x00000100 ]
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87db66 |
+ [ payload load 1b @ network header + 4 => reg 1 ]
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+ [ cmp eq reg 1 0x00000006 ]
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87db66 |
+ [ payload load 1b @ network header + 5 => reg 1 ]
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87db66 |
+ [ cmp eq reg 1 0x00000004 ]
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87db66 |
+ [ payload load 5b @ network header + 18 => reg 1 ]
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+ [ cmp eq reg 1 0xc000edfe 0x000000ff ]
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+ [ counter pkts 0 bytes 0 ]
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87db66 |
+
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+arp filter OUTPUT 13 12
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+ [ payload load 2b @ network header + 0 => reg 1 ]
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+ [ cmp eq reg 1 0x00000100 ]
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87db66 |
+ [ payload load 1b @ network header + 4 => reg 1 ]
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87db66 |
+ [ cmp eq reg 1 0x00000006 ]
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87db66 |
+ [ payload load 1b @ network header + 5 => reg 1 ]
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87db66 |
+ [ cmp eq reg 1 0x00000004 ]
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87db66 |
+ [ payload load 4b @ network header + 18 => reg 1 ]
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|
87db66 |
+ [ cmp eq reg 1 0xc000edfe ]
|
|
|
87db66 |
+ [ counter pkts 0 bytes 0 ]
|
|
|
87db66 |
+
|
|
|
87db66 |
+arp filter OUTPUT 14 13
|
|
|
87db66 |
+ [ payload load 2b @ network header + 0 => reg 1 ]
|
|
|
87db66 |
+ [ cmp eq reg 1 0x00000100 ]
|
|
|
87db66 |
+ [ payload load 1b @ network header + 4 => reg 1 ]
|
|
|
87db66 |
+ [ cmp eq reg 1 0x00000006 ]
|
|
|
87db66 |
+ [ payload load 1b @ network header + 5 => reg 1 ]
|
|
|
87db66 |
+ [ cmp eq reg 1 0x00000004 ]
|
|
|
87db66 |
+ [ payload load 3b @ network header + 18 => reg 1 ]
|
|
|
87db66 |
+ [ cmp eq reg 1 0x0000edfe ]
|
|
|
87db66 |
+ [ counter pkts 0 bytes 0 ]
|
|
|
87db66 |
+
|
|
|
87db66 |
+arp filter OUTPUT 15 14
|
|
|
87db66 |
+ [ payload load 2b @ network header + 0 => reg 1 ]
|
|
|
87db66 |
+ [ cmp eq reg 1 0x00000100 ]
|
|
|
87db66 |
+ [ payload load 1b @ network header + 4 => reg 1 ]
|
|
|
87db66 |
+ [ cmp eq reg 1 0x00000006 ]
|
|
|
87db66 |
+ [ payload load 1b @ network header + 5 => reg 1 ]
|
|
|
87db66 |
+ [ cmp eq reg 1 0x00000004 ]
|
|
|
87db66 |
+ [ payload load 2b @ network header + 18 => reg 1 ]
|
|
|
87db66 |
+ [ cmp eq reg 1 0x0000edfe ]
|
|
|
87db66 |
+ [ counter pkts 0 bytes 0 ]
|
|
|
87db66 |
+
|
|
|
87db66 |
+arp filter OUTPUT 16 15
|
|
|
87db66 |
+ [ payload load 2b @ network header + 0 => reg 1 ]
|
|
|
87db66 |
+ [ cmp eq reg 1 0x00000100 ]
|
|
|
87db66 |
+ [ payload load 1b @ network header + 4 => reg 1 ]
|
|
|
87db66 |
+ [ cmp eq reg 1 0x00000006 ]
|
|
|
87db66 |
+ [ payload load 1b @ network header + 5 => reg 1 ]
|
|
|
87db66 |
+ [ cmp eq reg 1 0x00000004 ]
|
|
|
87db66 |
+ [ payload load 1b @ network header + 18 => reg 1 ]
|
|
|
87db66 |
+ [ cmp eq reg 1 0x000000fe ]
|
|
|
87db66 |
+ [ counter pkts 0 bytes 0 ]
|
|
|
87db66 |
+
|
|
|
87db66 |
+bridge filter OUTPUT 4
|
|
|
87db66 |
+ [ payload load 6b @ link header + 0 => reg 1 ]
|
|
|
87db66 |
+ [ cmp eq reg 1 0xc000edfe 0x0000eeff ]
|
|
|
87db66 |
+ [ counter pkts 0 bytes 0 ]
|
|
|
87db66 |
+
|
|
|
87db66 |
+bridge filter OUTPUT 5 4
|
|
|
87db66 |
+ [ payload load 6b @ link header + 0 => reg 1 ]
|
|
|
87db66 |
+ [ bitwise reg 1 = (reg=1 & 0xffffffff 0x0000f0ff ) ^ 0x00000000 0x00000000 ]
|
|
|
87db66 |
+ [ cmp eq reg 1 0xc000edfe 0x0000e0ff ]
|
|
|
87db66 |
+ [ counter pkts 0 bytes 0 ]
|
|
|
87db66 |
+
|
|
|
87db66 |
+bridge filter OUTPUT 6 5
|
|
|
87db66 |
+ [ payload load 5b @ link header + 0 => reg 1 ]
|
|
|
87db66 |
+ [ cmp eq reg 1 0xc000edfe 0x000000ff ]
|
|
|
87db66 |
+ [ counter pkts 0 bytes 0 ]
|
|
|
87db66 |
+
|
|
|
87db66 |
+bridge filter OUTPUT 7 6
|
|
|
87db66 |
+ [ payload load 4b @ link header + 0 => reg 1 ]
|
|
|
87db66 |
+ [ cmp eq reg 1 0xc000edfe ]
|
|
|
87db66 |
+ [ counter pkts 0 bytes 0 ]
|
|
|
87db66 |
+
|
|
|
87db66 |
+bridge filter OUTPUT 8 7
|
|
|
87db66 |
+ [ payload load 3b @ link header + 0 => reg 1 ]
|
|
|
87db66 |
+ [ cmp eq reg 1 0x0000edfe ]
|
|
|
87db66 |
+ [ counter pkts 0 bytes 0 ]
|
|
|
87db66 |
+
|
|
|
87db66 |
+bridge filter OUTPUT 9 8
|
|
|
87db66 |
+ [ payload load 2b @ link header + 0 => reg 1 ]
|
|
|
87db66 |
+ [ cmp eq reg 1 0x0000edfe ]
|
|
|
87db66 |
+ [ counter pkts 0 bytes 0 ]
|
|
|
87db66 |
+
|
|
|
87db66 |
+bridge filter OUTPUT 10 9
|
|
|
87db66 |
+ [ payload load 1b @ link header + 0 => reg 1 ]
|
|
|
87db66 |
+ [ cmp eq reg 1 0x000000fe ]
|
|
|
87db66 |
+ [ counter pkts 0 bytes 0 ]
|
|
|
87db66 |
+"
|
|
|
87db66 |
+
|
|
|
87db66 |
+diff -u -Z <(echo "$EXPECT") <(nft --debug=netlink list ruleset | awk '/^table/{exit} {print}')
|
|
|
87db66 |
--
|
|
|
87db66 |
2.28.0
|
|
|
87db66 |
|