From 7e78c7c089e7d9c10687d5b5e0102dfe82e9f01f Mon Sep 17 00:00:00 2001
From: Neal Cardwell <ncardwell@google.com>
Date: Fri, 22 Nov 2013 21:28:45 -0500
Subject: [PATCH] net-test: packetdrill MPLS support: verify outbound MPLS
label stacks
Code to verify that the outbound on-the-wire MPLS label stacks from
the kernel under test match those from the script.
Change-Id: Ib7e4e4dc04cdd8d760c8099948f7cdda7973202a
---
gtests/net/packetdrill/run_packet.c | 31 +++++++++++++++++++++++++++++
1 file changed, 31 insertions(+)
diff --git a/gtests/net/packetdrill/run_packet.c b/gtests/net/packetdrill/run_packet.c
index 212eff49..639940fb 100644
--- a/gtests/net/packetdrill/run_packet.c
+++ b/gtests/net/packetdrill/run_packet.c
@@ -843,6 +843,36 @@ static int verify_gre(
return STATUS_OK;
}
+/* Verify that required actual MPLS header fields are as the script expected. */
+static int verify_mpls(
+ const struct packet *actual_packet,
+ const struct packet *script_packet,
+ int layer, char **error)
+{
+ const struct header *actual_header = &actual_packet->headers[layer];
+ const struct header *script_header = &script_packet->headers[layer];
+ const struct mpls *actual_mpls = actual_packet->headers[layer].h.mpls;
+ const struct mpls *script_mpls = script_packet->headers[layer].h.mpls;
+ int num_entries = script_header->header_bytes / sizeof(struct mpls);
+ int i = 0;
+
+ if (script_header->header_bytes != actual_header->header_bytes) {
+ asprintf(error, "mismatch in MPLS label stack depth");
+ return STATUS_ERR;
+ }
+
+ for (i = 0; i < num_entries; ++i) {
+ const struct mpls *actual_entry = actual_mpls + i;
+ const struct mpls *script_entry = script_mpls + i;
+ if (memcmp(actual_entry, script_entry, sizeof(*script_entry))) {
+ asprintf(error, "mismatch in MPLS label %d", i);
+ return STATUS_ERR;
+ }
+ }
+
+ return STATUS_OK;
+}
+
typedef int (*verifier_func)(
const struct packet *actual_packet,
const struct packet *script_packet,
@@ -858,6 +888,7 @@ static int verify_header(
[HEADER_IPV4] = verify_ipv4,
[HEADER_IPV6] = verify_ipv6,
[HEADER_GRE] = verify_gre,
+ [HEADER_MPLS] = verify_mpls,
[HEADER_TCP] = verify_tcp,
[HEADER_UDP] = verify_udp,
};
--
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