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osmo-bsc
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bsc_subscriber: Allow creating subscribers identified by IMEI 

IMEI may be used as MobileIdentity during MO emergency call
establishment if the MS has no valid IMSI assigned.

Related: OS#5849
Change-Id: I586b1ee30cbb26ddf58788168d56c962e03ccd5c
This commit is contained in:
Pau Espin 2023-01-03 14:53:43 +01:00
parent 315af2f9ea
commit c409977031
2 changed files with 55 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
include/osmocom/bsc/bsc_subscriber.h
View File

@ -17,6 +17,7 @@ struct bsc_subscr {
struct osmo_use_count use_count;
char imsi[GSM23003_IMSI_MAX_DIGITS+1];
char imei[GSM23003_IMEI_NUM_DIGITS_NO_CHK+1];
uint32_t tmsi;
/* List head of (struct gsm_paging_request).bsub_entry */
@ -30,6 +31,9 @@ const char *bsc_subscr_id(struct bsc_subscr *bsub);
struct bsc_subscr *bsc_subscr_find_or_create_by_imsi(struct llist_head *list,
const char *imsi,
const char *use_token);
struct bsc_subscr *bsc_subscr_find_or_create_by_imei(struct llist_head *list,
const char *imei,
const char *use_token);
struct bsc_subscr *bsc_subscr_find_or_create_by_tmsi(struct llist_head *list,
uint32_t tmsi,
const char *use_token);
@ -39,6 +43,9 @@ struct bsc_subscr *bsc_subscr_find_or_create_by_mi(struct llist_head *list, cons
struct bsc_subscr *bsc_subscr_find_by_imsi(struct llist_head *list,
const char *imsi,
const char *use_token);
struct bsc_subscr *bsc_subscr_find_by_imei(struct llist_head *list,
const char *imei,
const char *use_token);
struct bsc_subscr *bsc_subscr_find_by_tmsi(struct llist_head *list,
uint32_t tmsi,
const char *use_token);
@ -46,6 +53,7 @@ struct bsc_subscr *bsc_subscr_find_by_mi(struct llist_head *list, const struct o
const char *use_token);
void bsc_subscr_set_imsi(struct bsc_subscr *bsub, const char *imsi);
void bsc_subscr_set_imei(struct bsc_subscr *bsub, const char *imei);
#define bsc_subscr_get(bsc_subscr, use) \
OSMO_ASSERT(osmo_use_count_get_put(&(bsc_subscr)->use_count, use, 1) == 0)

47
src/osmo-bsc/bsc_subscriber.c
View File

@ -103,6 +103,24 @@ struct bsc_subscr *bsc_subscr_find_by_imsi(struct llist_head *list,
return NULL;
}
struct bsc_subscr *bsc_subscr_find_by_imei(struct llist_head *list,
const char *imei,
const char *use_token)
{
struct bsc_subscr *bsub;
if (!imei || !*imei)
return NULL;
llist_for_each_entry(bsub, list, entry) {
if (!strcmp(bsub->imei, imei)) {
bsc_subscr_get(bsub, use_token);
return bsub;
}
}
return NULL;
}
struct bsc_subscr *bsc_subscr_find_by_tmsi(struct llist_head *list,
uint32_t tmsi,
const char *use_token)
@ -129,6 +147,8 @@ struct bsc_subscr *bsc_subscr_find_by_mi(struct llist_head *list, const struct o
switch (mi->type) {
case GSM_MI_TYPE_IMSI:
return bsc_subscr_find_by_imsi(list, mi->imsi, use_token);
case GSM_MI_TYPE_IMEI:
return bsc_subscr_find_by_imei(list, mi->imei, use_token);
case GSM_MI_TYPE_TMSI:
return bsc_subscr_find_by_tmsi(list, mi->tmsi, use_token);
default:
@ -143,6 +163,13 @@ void bsc_subscr_set_imsi(struct bsc_subscr *bsub, const char *imsi)
osmo_strlcpy(bsub->imsi, imsi, sizeof(bsub->imsi));
}
void bsc_subscr_set_imei(struct bsc_subscr *bsub, const char *imei)
{
if (!bsub)
return;
osmo_strlcpy(bsub->imei, imei, sizeof(bsub->imei));
}
struct bsc_subscr *bsc_subscr_find_or_create_by_imsi(struct llist_head *list,
const char *imsi,
const char *use_token)
@ -159,6 +186,22 @@ struct bsc_subscr *bsc_subscr_find_or_create_by_imsi(struct llist_head *list,
return bsub;
}
struct bsc_subscr *bsc_subscr_find_or_create_by_imei(struct llist_head *list,
const char *imei,
const char *use_token)
{
struct bsc_subscr *bsub;
bsub = bsc_subscr_find_by_imei(list, imei, use_token);
if (bsub)
return bsub;
bsub = bsc_subscr_alloc(list);
if (!bsub)
return NULL;
bsc_subscr_set_imei(bsub, imei);
bsc_subscr_get(bsub, use_token);
return bsub;
}
struct bsc_subscr *bsc_subscr_find_or_create_by_tmsi(struct llist_head *list,
uint32_t tmsi,
const char *use_token)
@ -183,6 +226,8 @@ struct bsc_subscr *bsc_subscr_find_or_create_by_mi(struct llist_head *list, cons
switch (mi->type) {
case GSM_MI_TYPE_IMSI:
return bsc_subscr_find_or_create_by_imsi(list, mi->imsi, use_token);
case GSM_MI_TYPE_IMEI:
return bsc_subscr_find_or_create_by_imei(list, mi->imei, use_token);
case GSM_MI_TYPE_TMSI:
return bsc_subscr_find_or_create_by_tmsi(list, mi->tmsi, use_token);
default:
@ -200,6 +245,8 @@ static int bsc_subscr_name_buf(char *buf, size_t buflen, struct bsc_subscr *bsub
}
if (bsub->imsi[0])
OSMO_STRBUF_PRINTF(sb, "-IMSI-%s", bsub->imsi);
else if (bsub->imei[0])
OSMO_STRBUF_PRINTF(sb, "-IMEI-%s", bsub->imei);
if (bsub->tmsi != GSM_RESERVED_TMSI)
OSMO_STRBUF_PRINTF(sb, "-TMSI-0x%08x", bsub->tmsi);
return sb.chars_needed;