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[ePDG] Add Node-Identifier IE support in GTPv2 S2b Create-Session-Request for SMF Diameter S6b Routing (#3507)

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Implement support for Node-Identifier IE in GTPv2 S2b Create-Session-Request
to SMF for Diameter S6b integration

This patch adds support for processing the Node-Identifier IE within GTPv2
Create-Session-Request messages sent via the S2b interface to the SMF.
When the ePDG includes the Node-Identifier IE containing both host and realm
of the AAA-Server, the SMF now uses this information to populate
the Destination-Realm and Destination-Host AVPs in the Diameter S6b AAR message.

This enables seamless integration and allows the SMF to route requests directly
to the appropriate AAA-Server, enhancing interoperability in setups
where the host and realm data are required by the Diameter network.
This commit is contained in:
Sukchan Lee
2024-10-31 22:20:06 +09:00
parent ce36143f5c
commit bc02e48d1a
7 changed files with 186 additions and 5 deletions
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13
tests/non3gpp/s2b-build.c
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@@ -46,6 +46,9 @@ ogs_pkbuf_t *test_s2b_build_create_session_request(
ogs_gtp2_indication_t indication;
char node_identifier_buf[OGS_GTP2_MAX_NODE_IDENTIFIER_LEN];
ogs_gtp2_node_identifier_t node_identifier;
ogs_assert(sess);
test_ue = sess->test_ue;
ogs_assert(test_ue);
@@ -172,6 +175,16 @@ ogs_pkbuf_t *test_s2b_build_create_session_request(
(uint8_t *)"\x80\x00\x0d\x00";
req->additional_protocol_configuration_options.len = 4;
memset(&node_identifier, 0, sizeof(ogs_gtp2_node_identifier_t));
node_identifier.name = "aaa.localdomain";
node_identifier.name_len = strlen(node_identifier.name);
node_identifier.realm = "localdomain";
node_identifier.realm_len = strlen(node_identifier.realm);
req->_aaa_server_identifier.presence = 1;
ogs_gtp2_build_node_identifier(
&req->_aaa_server_identifier, &node_identifier,
node_identifier_buf, OGS_GTP2_MAX_NODE_IDENTIFIER_LEN);
gtp_message.h.type = type;
return ogs_gtp2_build_msg(&gtp_message);
}