Change in osmo-ttcn3-hacks[master]: ggsn: add tests to validate IPv4v6 pdp ctx

osmith gerrit-no-reply at lists.osmocom.org
Thu Mar 14 09:10:45 UTC 2019


osmith has submitted this change and it was merged. ( https://gerrit.osmocom.org/13231 )

Change subject: ggsn: add tests to validate IPv4v6 pdp ctx
......................................................................

ggsn: add tests to validate IPv4v6 pdp ctx

Add related templates based on 3GPP TS 29.060 Figure 37A and create
tests based on existing IPv4 and v6 ones.

Related: OS#2900
Change-Id: I3bab7df5caddc5c8b973c81544f954d5473ac234
---
M ggsn_tests/GGSN_Tests.ttcn
M library/GTP_Templates.ttcn
2 files changed, 198 insertions(+), 0 deletions(-)

Approvals:
  Max: Looks good to me, but someone else must approve
  Pau Espin Pedrol: Looks good to me, but someone else must approve
  osmith: Looks good to me, approved
  Jenkins Builder: Verified



diff --git a/ggsn_tests/GGSN_Tests.ttcn b/ggsn_tests/GGSN_Tests.ttcn
index 3c99fd9..398aed3 100644
--- a/ggsn_tests/GGSN_Tests.ttcn
+++ b/ggsn_tests/GGSN_Tests.ttcn
@@ -257,6 +257,10 @@
 					    not match(cpr.endUserAddress, tr_EuaIPv6(?))) {
 						setverdict(fail);
 					}
+					if (match(ctx.eua, t_EuaIPv4v6(?, ?)) and
+					    not match(cpr.endUserAddress, tr_EuaIPv4v6(?, ?))) {
+						setverdict(fail);
+					}
 					/* Check if PCO response corresponds to request */
 					if (ispresent(ctx.pco_req)) {
 						if (match(ctx.pco_req, ts_PCO_IPv4_DNS_CONT) and
@@ -697,6 +701,21 @@
 		f_wait_icmp6(ctx, (tr_ICMPv6_ERP,tr_ICMPv6_DU));
 	}
 
+	/* create ICMPv6 router solicitation deriving link-id from PDP Context EUA */
+	function f_icmpv6_rs_for_pdp46(in PdpContext ctx) return octetstring {
+		var OCT16 interface_id := ctx.eua.endUserAddress.endUserAddressIPv4andIPv6.ipv6_address;
+		return f_gen_icmpv6_router_solicitation(interface_id);
+	}
+
+	/* generate and encode ICMPv6 neighbor solicitation for PDP Context */
+	function f_gen_icmpv6_neigh_solicit_for_pdp46(in PdpContext ctx) return octetstring {
+		var OCT16 interface_id := ctx.eua.endUserAddress.endUserAddressIPv4andIPv6.ipv6_address;
+		var OCT16 link_local := f_ipv6_link_local(interface_id);
+		var OCT16 daddr := f_ipv6_sol_node_mcast(link_local);
+
+		return f_gen_icmpv6_neigh_solicit(link_local, daddr, link_local);
+	}
+
 	/* Assert we don't receive a ICMPv4/6 echo reply (or unreachable) from GTP */
 	function f_wait_gtpu_fail(PdpContext ctx) runs on GT_CT {
 		T_default.start;
@@ -1028,6 +1047,154 @@
 		f_pdp_ctx_del(ctx, '1'B);
 	}
 
+	/* Test IPv4v6 context activation for dynamic IPv4v6 EUA without DNS request */
+	testcase TC_pdp46_act_deact() runs on GT_CT {
+		f_init();
+		var PdpContext ctx := valueof(t_DefinePDP(f_rnd_imsi('26242'H), '1234'O, c_ApnInet46, valueof(t_EuaIPv4Dynv6Dyn)));
+		f_pdp_ctx_act(ctx);
+		f_pdp_ctx_del(ctx, '1'B);
+	}
+
+	/* Test PDP context activation for dynamic IPv4v6 EUA with IPv4 DNS in IPCP */
+	testcase TC_pdp46_act_deact_ipcp() 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_ApnInet46, valueof(t_EuaIPv4Dynv6Dyn)));
+		ctx.pco_req := valueof(ts_PCO_IPv4_DNS_IPCP);
+		f_pdp_ctx_act(ctx);
+		/* 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 IPv4 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");
+			}
+		}
+		f_pdp_ctx_del(ctx, '1'B);
+	}
+
+	/* Test PDP context activation for dynamic IPv4v6 EUA with IPv6 DNS in PCO and router solicitation/advertisement */
+	testcase TC_pdp46_act_deact_icmp6() runs on GT_CT {
+		f_init();
+		var PdpContext ctx := valueof(t_DefinePDP(f_rnd_imsi('26242'H), '1234'O, c_ApnInet46, valueof(t_EuaIPv4Dynv6Dyn)));
+		ctx.pco_req := valueof(ts_PCO_IPv6_DNS);
+		f_pdp_ctx_act(ctx);
+
+		f_send_gtpu(ctx, f_icmpv6_rs_for_pdp46(ctx));
+		f_wait_rtr_adv(ctx);
+		f_send_gtpu(ctx, f_gen_icmpv6_neigh_solicit_for_pdp46(ctx));
+
+		f_pdp_ctx_del(ctx, '1'B);
+	}
+
+	/* Test IPv4v6 context activation for dynamic IPv4v6 EUA with request of IPv4 DNS in PCO */
+	testcase TC_pdp46_act_deact_pcodns4() runs on GT_CT {
+		f_init();
+
+		var PdpContext ctx := valueof(t_DefinePDP(f_rnd_imsi('26242'H), '1234'O, c_ApnInet46, valueof(t_EuaIPv4Dynv6Dyn)));
+		ctx.pco_req := valueof(ts_PCO_IPv4_DNS_CONT);
+		f_pdp_ctx_act(ctx);
+
+		/* verify PCO contains both primary and secondary IPv4 DNS */
+		var OCT4 ggsn_ip4_dns1 := f_inet_addr(m_ggsn_ip4_dns1);
+		if (not match(f_PCO_extract_proto(ctx.pco_neg, '000d'O, 1), ggsn_ip4_dns1)) {
+				setverdict(fail, "Primary DNS IPv4 PCO option not found");
+		}
+
+		var OCT4 ggsn_ip4_dns2 := f_inet_addr(m_ggsn_ip4_dns2);
+		if (not match(f_PCO_extract_proto(ctx.pco_neg, '000d'O, 2), ggsn_ip4_dns2)) {
+				setverdict(fail, "Secondary DNS IPv4 PCO option not found");
+		}
+
+		f_pdp_ctx_del(ctx, '1'B);
+	}
+
+	/* Test IPv4v6 context activation for dynamic IPv4v6 EUA with request of IPv6 DNS in PCO */
+	testcase TC_pdp46_act_deact_pcodns6() runs on GT_CT {
+		f_init();
+
+		var PdpContext ctx := valueof(t_DefinePDP(f_rnd_imsi('26242'H), '1234'O, c_ApnInet46, valueof(t_EuaIPv4Dynv6Dyn)));
+		ctx.pco_req := valueof(ts_PCO_IPv6_DNS);
+		f_pdp_ctx_act(ctx);
+
+		/* verify PCO contains both primary and secondary IPv6 DNS */
+		var OCT4 ggsn_ip6_dns1 := f_inet6_addr(m_ggsn_ip6_dns1);
+		if (not match(f_PCO_extract_proto(ctx.pco_neg, '0003'O, 1), ggsn_ip6_dns1)) {
+				setverdict(fail, "Primary DNS IPv6 PCO option not found");
+		}
+
+		var OCT4 ggsn_ip6_dns2 := f_inet6_addr(m_ggsn_ip6_dns2);
+		if (not match(f_PCO_extract_proto(ctx.pco_neg, '0003'O, 2), ggsn_ip6_dns2)) {
+				setverdict(fail, "Secondary DNS IPv6 PCO option not found");
+		}
+
+		f_pdp_ctx_del(ctx, '1'B);
+	}
+
+	/* Test PDP context activation for dynamic IPv4v6 EUA.
+	   Test we can send ICMPv6 ping over GTPU to DNS server. */
+	testcase TC_pdp46_act_deact_gtpu_access() runs on GT_CT {
+		f_init();
+		var PdpContext ctx := valueof(t_DefinePDP(f_rnd_imsi('26242'H), '1234'O, c_ApnInet46, valueof(t_EuaIPv4Dynv6Dyn)));
+		ctx.pco_req := valueof(ts_PCO_IPv4_DNS_CONT);
+		f_pdp_ctx_act(ctx);
+
+		var OCT4 dns1_addr := f_PCO_extract_proto(ctx.pco_neg, '000d'O);
+
+		/* Check if we can use valid global src addr, should work */
+		var OCT4 saddr := ctx.eua.endUserAddress.endUserAddressIPv4andIPv6.ipv4_address;
+		f_send_gtpu(ctx, f_gen_icmpv4_echo(saddr, dns1_addr));
+		f_wait_icmp4_echo_reply(ctx);
+
+		/* Assert that packets with wrong global src addr are dropped by GGSN */
+		var OCT4 saddr_wrong := substr(saddr, 0, 3) & (saddr[3] xor4b '11'O);
+		f_send_gtpu(ctx, f_gen_icmpv4_echo(saddr_wrong, dns1_addr));
+		f_wait_gtpu_fail(ctx);
+
+		/* Send an IPv6 RA to APN4, should fail (packet dropped) */
+		var OCT16 saddr_v6 := f_inet6_addr("fde4:8dba:82e1:2000:1:2:3:4");
+		f_send_gtpu(ctx, f_gen_icmpv6_router_solicitation(saddr_v6));
+		f_wait_gtpu_fail(ctx);
+		f_pdp_ctx_del(ctx, '1'B);
+	}
+
+	/* Validate if different clients (pdp ctx) can reach one another through GGSN. */
+	testcase TC_pdp46_clients_interact() runs on GT_CT {
+		f_init();
+		var PdpContext ctxA := valueof(t_DefinePDP(f_rnd_imsi('26242'H), '1234'O, c_ApnInet46, valueof(t_EuaIPv4Dynv6Dyn)));
+		var PdpContext ctxB := valueof(t_DefinePDP(f_rnd_imsi('26242'H), '1234'O, c_ApnInet46, valueof(t_EuaIPv4Dynv6Dyn)));
+		f_pdp_ctx_act(ctxA);
+		f_send_gtpu(ctxA, f_icmpv6_rs_for_pdp46(ctxA));
+		f_wait_rtr_adv(ctxA);
+		f_send_gtpu(ctxA, f_gen_icmpv6_neigh_solicit_for_pdp46(ctxA));
+
+		f_pdp_ctx_act(ctxB);
+		f_send_gtpu(ctxB, f_icmpv6_rs_for_pdp46(ctxB));
+		f_wait_rtr_adv(ctxB);
+		f_send_gtpu(ctxB, f_gen_icmpv6_neigh_solicit_for_pdp46(ctxB));
+
+		var OCT16 addrA_ll := f_ipv6_link_local(ctxA.eua.endUserAddress.endUserAddressIPv4andIPv6.ipv6_address);
+		var OCT16 addrB_ll := f_ipv6_link_local(ctxB.eua.endUserAddress.endUserAddressIPv4andIPv6.ipv6_address);
+		var OCT16 addrA_glob := f_ipv6_global(ctxA.eua.endUserAddress.endUserAddressIPv4andIPv6.ipv6_address);
+		var OCT16 addrB_glob := f_ipv6_global(ctxB.eua.endUserAddress.endUserAddressIPv4andIPv6.ipv6_address);
+
+		/* Validate if clients can interact using ll addr. */
+		f_send_gtpu(ctxA, f_gen_icmpv6_echo(addrA_ll, addrB_ll));
+		f_wait_gtpu_fail(ctxB);
+
+		/* Validate if clients can interact using global addr. */
+		f_send_gtpu(ctxA, f_gen_icmpv6_echo(addrA_glob, addrB_glob));
+		f_wait_gtpu_fail(ctxB);
+
+		f_pdp_ctx_del(ctxA, '1'B);
+	}
+
 	control {
 		execute(TC_pdp4_act_deact());
 		execute(TC_pdp4_act_deact_ipcp());
@@ -1044,6 +1211,14 @@
 		execute(TC_pdp6_act_deact_gtpu_access());
 		execute(TC_pdp6_clients_interact());
 
+		execute(TC_pdp46_act_deact());
+		execute(TC_pdp46_act_deact_ipcp());
+		execute(TC_pdp46_act_deact_icmp6());
+		execute(TC_pdp46_act_deact_pcodns4());
+		execute(TC_pdp46_act_deact_pcodns6());
+		execute(TC_pdp46_act_deact_gtpu_access());
+		execute(TC_pdp46_clients_interact());
+
 		execute(TC_echo_req_resp());
 	}
 }
diff --git a/library/GTP_Templates.ttcn b/library/GTP_Templates.ttcn
index 018f6da..bd39e27 100644
--- a/library/GTP_Templates.ttcn
+++ b/library/GTP_Templates.ttcn
@@ -161,6 +161,29 @@
 		}
 	}
 
+	/* 3GPP TS 29.060 Figure 37A: End User Address Information Element for IPv4v6 (both static) */
+	template EndUserAddress t_EuaIPv4v6(template OCT4 ip_addr4, template OCT16 ip_addr6) := {
+		type_gtpc := '80'O,
+		endUserAddress := {
+			endUserAddressIPv4andIPv6 := {
+				lengthf := 2,
+				pdp_typeorg := '0001'B,
+				spare := '1111'B,
+				pdp_typenum := '8D'O,
+				ipv4_address := ip_addr4,
+				ipv6_address := ip_addr6
+			}
+		}
+	}
+	template EndUserAddress t_EuaIPv4Dynv6Dyn := t_EuaIPv4v6(omit, omit);
+	template EndUserAddress tr_EuaIPv4v6(template OCT4 ip_addr4, template OCT16 ip_addr6) modifies t_EuaIPv4v6 := {
+		endUserAddress := {
+			endUserAddressIPv4andIPv6 := {
+				lengthf := 2+lengthof(ip_addr4)+lengthof(ip_addr6)
+			}
+		}
+	}
+
 	template AccessPointName ts_APN(octetstring apn) := {
 		type_gtpc := '83'O,
 		lengthf := lengthof(apn),

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Gerrit-Project: osmo-ttcn3-hacks
Gerrit-Branch: master
Gerrit-MessageType: merged
Gerrit-Change-Id: I3bab7df5caddc5c8b973c81544f954d5473ac234
Gerrit-Change-Number: 13231
Gerrit-PatchSet: 3
Gerrit-Owner: osmith <osmith at sysmocom.de>
Gerrit-Reviewer: Daniel Willmann <dwillmann at sysmocom.de>
Gerrit-Reviewer: Jenkins Builder (1000002)
Gerrit-Reviewer: Max <msuraev at sysmocom.de>
Gerrit-Reviewer: Pau Espin Pedrol <pespin at sysmocom.de>
Gerrit-Reviewer: osmith <osmith at sysmocom.de>
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