Scapy allows to define packets in descriptive form that is easier to
digest and debug.
Signed-off-by: Ihar Hrachyshka <ihrac...@redhat.com>
---
v1: initial version
v2: use .decode() instead of sed to truncate b'...'
v2: remove unnecessary backspaces in example of use
v2: use $PYTHON3
---
tests/ovn-macros.at | 23 +++++++++++++++++++++++
1 file changed, 23 insertions(+)
diff --git a/tests/ovn-macros.at b/tests/ovn-macros.at
index ee942e8a6..6f2d085ae 100644
--- a/tests/ovn-macros.at
+++ b/tests/ovn-macros.at
@@ -817,6 +817,29 @@ ovn_trace_client() {
ovs-appctl -t $target trace "$@" | tee trace | sed '/^# /d'
}
+# Receives a string with scapy python code that represents a packet.
+# Returns a hex-string that contains bytes that reflect the packet symbolic
+# description.
+#
+# Scapy docs: https://scapy.readthedocs.io/en/latest/usage.html
+#
+# Example of usage:
+#
+# packet=$(fmt_pkt "
+# Ether(dst='ff:ff:ff:ff:ff:ff', src='50:64:00:00:00:01') /
+# IPv6(src='abed::1', dst='ff02::1:ff00:2') /
+# ICMPv6ND_NS(tgt='abed::2')
+# ")
+#
+# ovs-appctl netdev-dummy/receive $vif $packet
+#
+fmt_pkt() {
+ echo "from scapy.all import *; \
+ import binascii; \
+ out = binascii.hexlify(raw($1)); \
+ print(out.decode())" | $PYTHON3
+}
+
OVS_END_SHELL_HELPERS
m4_define([OVN_POPULATE_ARP], [AT_CHECK(ovn_populate_arp__, [0], [ignore])])
--
2.38.1
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