Update icmp_responder to only respond only linkmgrd requests (sonic…

…-net#9089) Summary: Fixes # (issue) To make sure `icmp_responder` only replies ICMP requests sent by linkmgrd, So 1. it won't reply packets from other tests. 2. to be consistent with production behavior sign-off: Jing Zhang [email protected]
zhixzhu · Aug 4, 2023 · d870626 · d870626
1 parent 0982d75
commit d870626
Showing 1 changed file with 7 additions and 5 deletions.
diff --git a/tests/scripts/icmp_responder.py b/tests/scripts/icmp_responder.py
@@ -15,17 +15,19 @@
 # As defined in asm/socket.h
 SO_ATTACH_FILTER = 26
 
-# BPF filter "icmp[0] == 8"
+# BPF filter "icmp[icmptype]==8 and src host 10.1.0.36"
 icmp_bpf_filter = [
     [0x28, 0, 0, 0x0000000c],
-    [0x15, 0, 8, 0x00000800],
+    [0x15, 0, 10, 0x00000800],
     [0x30, 0, 0, 0x00000017],
-    [0x15, 0, 6, 0x00000001],
+    [0x15, 0, 8, 0x00000001],
     [0x28, 0, 0, 0x00000014],
-    [0x45, 4, 0, 0x00001fff],
+    [0x45, 6, 0, 0x00001fff],
     [0xb1, 0, 0, 0x0000000e],
     [0x50, 0, 0, 0x0000000e],
-    [0x15, 0, 1, 0x00000008],
+    [0x15, 0, 3, 0x00000008],
+    [0x20, 0, 0, 0x0000001a],
+    [0x15, 0, 1, 0x0a010024],
     [0x6, 0, 0, 0x00040000],
     [0x6, 0, 0, 0x00000000]
 ]