Change in osmo-ttcn3-hacks[master]: ggsn: Add TC_pdp4_act_deact_ipcp_pap_broken()

Harald Welte gerrit-no-reply at lists.osmocom.org
Wed Apr 10 08:52:06 UTC 2019


Harald Welte has uploaded this change for review. ( https://gerrit.osmocom.org/13564


Change subject: ggsn: Add TC_pdp4_act_deact_ipcp_pap_broken()
......................................................................

ggsn: Add TC_pdp4_act_deact_ipcp_pap_broken()

This test case reproduces a real-world PCO capture including a broken
PAP AuthenticationReq.  It triggers some weird behavior in OsmoGGSN
1.3.0 where it would send duplicate IPCP repsonses and no PAP response.

Change-Id: Ie89d984ed9e26fbbb2e4914bdb8623446d462a4c
Related: OS#3914
---
M ggsn_tests/GGSN_Tests.ttcn
M library/GTP_Templates.ttcn
2 files changed, 40 insertions(+), 0 deletions(-)



  git pull ssh://gerrit.osmocom.org:29418/osmo-ttcn3-hacks refs/changes/64/13564/1

diff --git a/ggsn_tests/GGSN_Tests.ttcn b/ggsn_tests/GGSN_Tests.ttcn
index 9370904..c42ee21 100644
--- a/ggsn_tests/GGSN_Tests.ttcn
+++ b/ggsn_tests/GGSN_Tests.ttcn
@@ -899,6 +899,35 @@
 		f_pdp_ctx_del(ctx, '1'B);
 	}
 
+	/* Test PDP context activation for dynamic IPv4 EUA with IPv4 DNS in IPCP + PAP authentication (broken) */
+	testcase TC_pdp4_act_deact_ipcp_pap_broken() runs on GT_CT {
+		f_init();
+		var OCT4 ggsn_ip4_dns1 := f_inet_addr(m_ggsn_ip4_dns1);
+		var OCT4 ggsn_ip4_dns2 := f_inet_addr(m_ggsn_ip4_dns2);
+		var PdpContext ctx := valueof(t_DefinePDP(f_rnd_imsi('26242'H), '1234'O, c_ApnInternet, valueof(t_EuaIPv4Dyn)));
+		ctx.pco_req := valueof(ts_PCO_PAP_IPv4_DNS);
+		f_pdp_ctx_act(ctx);
+		f_PCO_ensure_no_duplicates(ctx.pco_neg);
+		/* verify IPCP is at all contained */
+		if (not match(ctx.pco_neg, tr_PCO_Contains('8021'O))) {
+			setverdict(fail, "IPCP not found in PCO");
+		}
+		/* verify IPCP contains both primary and secondary DNS */
+		var IpcpPacket ipcp := dec_IpcpPacket(f_PCO_extract_proto(ctx.pco_neg, '8021'O));
+		if (not match(ipcp, tr_IPCP_Ack_DNS(0, ggsn_ip4_dns1, ggsn_ip4_dns2))) {
+			if (not match(ipcp, tr_IPCP_Ack_DNS(0))) {
+				setverdict(fail, "Primary/Secondary DNS PCO IPCP option not found");
+			} else {
+				setverdict(fail, "Primary/Secondary DNS PCO IPCP option found but not matching expected values");
+			}
+		}
+		/* verify that PAP is contained */
+		if (not match(ctx.pco_neg, tr_PCO_Contains('8023'O))) {
+			setverdict(fail, "IPCP not found in PCO");
+		}
+		f_pdp_ctx_del(ctx, '1'B);
+	}
+
 	/* Test PDP context activation for dynamic IPv4 EUA with IPv4 DNS in PCO */
 	testcase TC_pdp4_act_deact_pcodns() runs on GT_CT {
 		f_init();
diff --git a/library/GTP_Templates.ttcn b/library/GTP_Templates.ttcn
index bd39e27..e1f19f1 100644
--- a/library/GTP_Templates.ttcn
+++ b/library/GTP_Templates.ttcn
@@ -460,6 +460,17 @@
 		lengthProtoID := ?,
 		protoIDContents := ?
 	}
+	template ProtocolElement ts_PCOelem_PAP_broken := {
+		protocolID := 'C023'O,
+		lengthProtoID := 60,
+		protoIDContents := '0100003c0444435338323700bc1c08087c1508083e00790000150808fd06000001000000000000000000000000000000000000000000000000000000'O
+	}
+	template ProtConfigOptions ts_PCO_PAP_IPv4_DNS modifies ts_PCO := {
+		protocols := {
+			ts_PCOelem_PAP_broken,
+			{ protocolID := '8021'O, lengthProtoID := 16, protoIDContents := enc_IpcpPacket(valueof(ts_IPCP_ReqDNS)) }
+		}
+	}
 	template ProtConfigOptions tr_PCO_Contains(OCT2 prot_id) modifies tr_PCO := {
 		protocols := { *, tr_PCO_Proto(prot_id), * }
 	}

-- 
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Gerrit-Project: osmo-ttcn3-hacks
Gerrit-Branch: master
Gerrit-MessageType: newchange
Gerrit-Change-Id: Ie89d984ed9e26fbbb2e4914bdb8623446d462a4c
Gerrit-Change-Number: 13564
Gerrit-PatchSet: 1
Gerrit-Owner: Harald Welte <laforge at gnumonks.org>
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