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SMS over GSUP: implement vty config of SMSC routing

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At the user-visible level (advanced settings menus on phones,
GSM 07.05 AT commands, SIM programming) each SMSC is identified
by a numeric address that looks like a phone number, originally
meant to be a Global Title.  OsmoMSC passes these SMSC addresses
through as-is to MO-forwardSM.req GSUP message - however, SMSCs
that connect to OsmoHLR via GSUP identify themselves by their
IPA names instead.  Hence we need a mapping mechanism in OsmoHLR
config.

To accommodate different styles of network design ranging from
strict recreation of classic GSM architecture to guest roaming
arrangements, a two-level configuration is implemented, modeled
after EUSE/USSD configuration: first one defines which SMSCs exist
as entities, identified only by their IPA names, and then one
defines which numeric SMSC address (in SM-RP-DA) should go to which
configured SMSC, with the additional possibility of a default route.

Related: OS#6135
Change-Id: I1624dcd9d22b4efca965ccdd1c74f0063a94a33c
This commit is contained in:
Mychaela N. Falconia
2023-09-21 01:55:51 +00:00
parent fa6af8872f
commit ff7c7ea085
9 changed files with 312 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
include/osmocom/hlr/Makefile.am
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@@ -6,6 +6,7 @@ noinst_HEADERS = \
gsup_router.h \
gsup_server.h \
hlr.h \
hlr_sms.h \
hlr_ussd.h \
hlr_vty.h \
hlr_vty_subscr.h \

4
include/osmocom/hlr/hlr.h
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@@ -74,6 +74,10 @@ struct hlr {
struct llist_head ss_sessions;
struct llist_head smsc_list;
struct llist_head smsc_routes;
struct hlr_smsc *smsc_default;
bool store_imei;
bool subscr_create_on_demand;

29
include/osmocom/hlr/hlr_sms.h Normal file
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@@ -0,0 +1,29 @@
#pragma once
#include <osmocom/core/linuxlist.h>
struct hlr_smsc {
/* g_hlr->smsc_list */
struct llist_head list;
struct hlr *hlr;
/* name (must match the IPA ID tag) */
const char *name;
/* human-readable description */
const char *description;
};
struct hlr_smsc *smsc_find(struct hlr *hlr, const char *name);
struct hlr_smsc *smsc_alloc(struct hlr *hlr, const char *name);
void smsc_free(struct hlr_smsc *smsc);
struct hlr_smsc_route {
/* g_hlr->smsc_routes */
struct llist_head list;
const char *num_addr;
struct hlr_smsc *smsc;
};
struct hlr_smsc_route *smsc_route_find(struct hlr *hlr, const char *num_addr);
struct hlr_smsc_route *smsc_route_alloc(struct hlr *hlr, const char *num_addr,
struct hlr_smsc *smsc);
void smsc_route_free(struct hlr_smsc_route *rt);

1
include/osmocom/hlr/hlr_vty.h
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@@ -31,6 +31,7 @@ enum hlr_vty_node {
HLR_NODE = _LAST_OSMOVTY_NODE + 1,
GSUP_NODE,
EUSE_NODE,
SMSC_NODE,
MSLOOKUP_NODE,
MSLOOKUP_SERVER_NODE,
MSLOOKUP_SERVER_MSC_NODE,