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[HR] Implement GTP-U processing for HR Roaming in User Plane (#2194)

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- Added support for the N9 For Roaming interface type:
  - Core interface act as V-UPF.
  - Access interface act as H-UPF.

- Modified V-UPF behavior:
  - V-UPF updates only the TEID and IP Address in the GTP-U header.
  - The content following the Extension Header is passed through directly
    between the UE and H-UPF.

This implementation ensures seamless data flow between the UE, V-UPF, and H-UPF
while maintaining integrity for Home Routed Roaming scenarios.
This commit is contained in:
Sukchan Lee 2024-11-23 17:51:42 +09:00
parent 70c888f4c9
commit b47bad8b84
25 changed files with 542 additions and 342 deletions
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51
tests/common/gtpu.c
View file

@ -1,5 +1,5 @@
/*
* Copyright (C) 2019,2020 by Sukchan Lee <acetcom@gmail.com>
* Copyright (C) 2019-2024 by Sukchan Lee <acetcom@gmail.com>
*
* This file is part of Open5GS.
*
@ -189,6 +189,7 @@ int test_gtpu_send(
gnode.addr.ogs_sin_port = htobe16(OGS_GTPV1_U_UDP_PORT);
gnode.sock = node->sock;
ogs_assert(gnode.sock);
if (bearer->qfi) {
if (sess->upf_n3_ip.ipv4) {
@ -220,7 +221,14 @@ int test_gtpu_send(
ogs_assert_if_reached();
}
return ogs_gtp2_send_user_plane(&gnode, header_desc, pkbuf);
ogs_gtp2_encapsulate_header(header_desc, pkbuf);
ogs_assert(OGS_OK == ogs_gtp_send_with_teid(
gnode.sock, pkbuf, header_desc->teid, &gnode.addr));
ogs_pkbuf_free(pkbuf);
return OGS_OK;
}
int test_gtpu_send_ping(
@ -464,6 +472,45 @@ int test_gtpu_send_slacc_rs_with_unspecified_source_address(
return test_gtpu_send(node, bearer, &header_desc, pkbuf);
}
int test_gtpu_send_end_marker(
ogs_socknode_t *node, test_bearer_t *bearer)
{
test_sess_t *sess = NULL;
ogs_gtp2_header_desc_t header_desc;
ogs_pkbuf_t *pkbuf = NULL;
ogs_assert(bearer);
sess = bearer->sess;
ogs_assert(sess);
pkbuf = ogs_pkbuf_alloc(NULL, OGS_GTPV1U_5GC_HEADER_LEN);
ogs_assert(pkbuf);
ogs_pkbuf_reserve(pkbuf, OGS_GTPV1U_5GC_HEADER_LEN);
memset(&header_desc, 0, sizeof(header_desc));
header_desc.type = OGS_GTPU_MSGTYPE_END_MARKER;
if (bearer->qfi) {
/* 5GC */
header_desc.teid = sess->upf_n3_teid;
header_desc.pdu_type =
OGS_GTP2_EXTENSION_HEADER_PDU_TYPE_UL_PDU_SESSION_INFORMATION;
header_desc.qos_flow_identifier = bearer->qfi;
} else if (bearer->ebi) {
/* EPC */
header_desc.teid = bearer->sgw_s1u_teid;
} else {
ogs_fatal("No QFI[%d] and EBI[%d]", bearer->qfi, bearer->ebi);
ogs_assert_if_reached();
}
return test_gtpu_send(node, bearer, &header_desc, pkbuf);
}
int test_gtpu_send_error_indication(
ogs_socknode_t *node, test_bearer_t *bearer)

4
tests/common/gtpu.h
View file

@ -1,5 +1,5 @@
/*
* Copyright (C) 2019,2020 by Sukchan Lee <acetcom@gmail.com>
* Copyright (C) 2019-2024 by Sukchan Lee <acetcom@gmail.com>
*
* This file is part of Open5GS.
*
@ -41,6 +41,8 @@ int test_gtpu_send_ping(
int test_gtpu_send_slacc_rs(ogs_socknode_t *node, test_bearer_t *bearer);
int test_gtpu_send_slacc_rs_with_unspecified_source_address(
ogs_socknode_t *node, test_bearer_t *bearer);
int test_gtpu_send_end_marker(
ogs_socknode_t *node, test_bearer_t *bearer);
int test_gtpu_send_error_indication(
ogs_socknode_t *node, test_bearer_t *bearer);
int test_gtpu_send_indirect_data_forwarding(