From 3e91230d8746564c83c2f3c0f61b8dfd7b523eee Mon Sep 17 00:00:00 2001
From: Neal Cardwell <ncardwell@google.com>
Date: Fri, 22 Nov 2013 21:13:58 -0500
Subject: [PATCH] net-test: packetdrill MPLS support: test for printing MPLS
label stacks
Test code to print on-the-wire MPLS label stacks in a human-readable
format matching the script syntax.
Change-Id: I7e5d0d8d07490fee1fb744bbd03804bb12e22ae4
---
.../net/packetdrill/packet_to_string_test.c | 53 +++++++++++++++++++
1 file changed, 53 insertions(+)
diff --git a/gtests/net/packetdrill/packet_to_string_test.c b/gtests/net/packetdrill/packet_to_string_test.c
index 7bd2bd16..fc3b21c7 100644
--- a/gtests/net/packetdrill/packet_to_string_test.c
+++ b/gtests/net/packetdrill/packet_to_string_test.c
@@ -196,9 +196,62 @@ static void test_tcp_ipv6_packet_to_string(void)
packet_free(packet);
}
+static void test_gre_mpls_tcp_ipv4_packet_to_string(void)
+{
+ /* An IPv4/GRE/MPLS/IPv4/TCP packet. */
+ u8 data[] = {
+ /* IPv4: */
+ 0x45, 0x00, 0x00, 0x54, 0x00, 0x00, 0x40, 0x00,
+ 0x40, 0x2f, 0xb7, 0xcf, 0xc0, 0xa8, 0x00, 0x01,
+ 0xc0, 0x00, 0x02, 0x02,
+ /* GRE: */
+ 0x00, 0x00, 0x88, 0x47,
+ /* MPLS: */
+ 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff,
+ /* IPv4, TCP: */
+ 0x45, 0x00, 0x00, 0x34, 0x86, 0x99, 0x40, 0x00,
+ 0x40, 0x06, 0x31, 0x80, 0xc0, 0xa8, 0x00, 0x01,
+ 0xc0, 0x00, 0x02, 0x01, 0x1f, 0x90, 0xdb, 0xcc,
+ 0x7b, 0x81, 0xc5, 0x7c, 0x00, 0x00, 0x00, 0x01,
+ 0x80, 0x11, 0x01, 0xc5, 0xa6, 0xa6, 0x00, 0x00,
+ 0x01, 0x01, 0x08, 0x0a, 0x07, 0x02, 0x08, 0x43,
+ 0x00, 0x00, 0x00, 0x05
+ };
+
+ struct packet *packet = packet_new(sizeof(data));
+
+ /* Populate and parse a packet */
+ memcpy(packet->buffer, data, sizeof(data));
+ char *error = NULL;
+ enum packet_parse_result_t result =
+ parse_packet(packet, sizeof(data), PACKET_LAYER_3_IP,
+ &error);
+ assert(result == PACKET_OK);
+ assert(error == NULL);
+
+ int status = 0;
+ char *dump = NULL, *expected = NULL;
+
+ /* Test a DUMP_FULL dump */
+ status = packet_to_string(packet, DUMP_FULL, &dump, &error);
+ assert(status == STATUS_OK);
+ assert(error == NULL);
+ printf("dump = '%s'\n", dump);
+ expected =
+ "ipv4 192.168.0.1 > 192.0.2.2: gre: "
+ "mpls (label 0, tc 0, ttl 0) "
+ "(label 1048575, tc 7, [S], ttl 255): "
+ "192.168.0.1:8080 > 192.0.2.1:56268 "
+ "F. 2072102268:2072102268(0) ack 1 win 453 "
+ "<nop,nop,TS val 117573699 ecr 5>";
+ assert(strcmp(dump, expected) == 0);
+ free(dump);
+}
+
int main(void)
{
test_tcp_ipv4_packet_to_string();
test_tcp_ipv6_packet_to_string();
+ test_gre_mpls_tcp_ipv4_packet_to_string();
return 0;
}
--
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