Change in libosmocore[master]: gsm23003: Add MME domain name related helper functions

[Harald Welte]

Harald Welte has uploaded this change for review. ( https://gerrit.osmocom.org/11411


Change subject: gsm23003: Add MME domain name related helper functions
......................................................................

gsm23003: Add MME domain name related helper functions

osmo_gen_mme_group_domain(), osmo_gen_mme_group_domain() and
osmo_gen_home_network_domain()

Change-Id: Ia882d9db05ec0037e593aeebea21bc31adb680bb
---
M include/osmocom/gsm/gsm23003.h
M include/osmocom/gsm/protocol/gsm_23_003.h
M src/gsm/gsm23003.c
M src/gsm/libosmogsm.map
4 files changed, 61 insertions(+), 0 deletions(-)



  git pull ssh://gerrit.osmocom.org:29418/libosmocore refs/changes/11/11411/1

diff --git a/include/osmocom/gsm/gsm23003.h b/include/osmocom/gsm/gsm23003.h
index fd4f369..0539fc7 100644
--- a/include/osmocom/gsm/gsm23003.h
+++ b/include/osmocom/gsm/gsm23003.h
@@ -120,3 +120,7 @@
 
 int osmo_mnc_cmp(uint16_t a_mnc, bool a_mnc_3_digits, uint16_t b_mnc, bool b_mnc_3_digits);
 int osmo_plmn_cmp(const struct osmo_plmn_id *a, const struct osmo_plmn_id *b);
+
+int osmo_gen_home_network_domain(char *out, uint16_t mcc, uint16_t mnc);
+int osmo_gen_mme_domain(char *out, uint8_t mmec, uint16_t mmegi, uint16_t mcc, uint16_t mnc);
+int osmo_gen_mme_group_domain(char *out, uint16_t mmegi, uint16_t mcc, uint16_t mnc);
diff --git a/include/osmocom/gsm/protocol/gsm_23_003.h b/include/osmocom/gsm/protocol/gsm_23_003.h
index 0e66939..ee697ff 100644
--- a/include/osmocom/gsm/protocol/gsm_23_003.h
+++ b/include/osmocom/gsm/protocol/gsm_23_003.h
@@ -24,3 +24,9 @@
 					 GSM23003_IMEI_SNR_NUM_DIGITS + 1)
 #define GSM23003_IMEISV_NUM_DIGITS	(GSM23003_IMEI_TAC_NUM_DIGITS + \
 					 GSM23003_IMEI_SNR_NUM_DIGITS + 2)
+
+/* Chapter 19.2 "epc.mnc000.mcc000.3gppnetwork.org" */
+#define GSM23003_HOME_NETWORK_DOMAIN_LEN	33
+
+/* Chapter 19.4.2.4: "mmec00.mmegi0000.mme.epc.mnc000.mcc000.3gppnetwork.org" */
+#define GSM23003_MME_DOMAIN_LEN			55
diff --git a/src/gsm/gsm23003.c b/src/gsm/gsm23003.c
index 2c3b21e..bb73364 100644
--- a/src/gsm/gsm23003.c
+++ b/src/gsm/gsm23003.c
@@ -297,3 +297,51 @@
 		return 1;
 	return osmo_mnc_cmp(a->mnc, a->mnc_3_digits, b->mnc, b->mnc_3_digits);
 }
+
+/*! Generate TS 23.003 Section 19.2 Home Network Realm/Domain (text form)
+ *  \param out[out] caller-provided output buffer, at least 33 bytes long
+ *  \param mcc[in] Mobile Country Code
+ *  \param mnc[in] Mobile Network Code
+ *  \returns number of characters printed (excluding NUL); negative on error */
+int osmo_gen_home_network_domain(char *out, uint16_t mcc, uint16_t mnc)
+{
+	if (mcc > 999)
+		return -EINVAL;
+	if (mnc > 999)
+		return -EINVAL;
+	return sprintf(out, "epc.mnc%03u.mcc%03u.3gppnetwork.org", mcc, mnc);
+}
+
+/*! Generate TS 23.003 Section 19.4.2.4 MME Domain (text form)
+ *  \param out[out] caller-provided output buffer, at least 56 bytes long
+ *  \param mmec[in] MME Code
+ *  \param mmegi[in] MME Group Identifier
+ *  \param mcc[in] Mobile Country Code
+ *  \param mnc[in] Mobile Network Code
+ *  \returns number of characters printed (excluding NUL); negative on error */
+int osmo_gen_mme_domain(char *out, uint8_t mmec, uint16_t mmegi, uint16_t mcc, uint16_t mnc)
+{
+	char domain[GSM23003_HOME_NETWORK_DOMAIN_LEN+1];
+	int rc;
+	rc = osmo_gen_home_network_domain(domain, mcc, mnc);
+	if (rc < 0)
+		return rc;
+	return sprintf(out, "mmec%02x.mmegi%04x.mme.%s", mmec, mmegi, domain);
+}
+
+/*! Generate TS 23.003 Section 19.4.2.4 MME Group Domain (text form)
+ *  \param out[out] caller-provided output buffer, at least 56 bytes long
+ *  \param mmec[in] MME Code
+ *  \param mmegi[in] MME Group Identifier
+ *  \param mcc[in] Mobile Country Code
+ *  \param mnc[in] Mobile Network Code
+ *  \returns number of characters printed (excluding NUL); negative on error */
+int osmo_gen_mme_group_domain(char *out, uint16_t mmegi, uint16_t mcc, uint16_t mnc)
+{
+	char domain[GSM23003_HOME_NETWORK_DOMAIN_LEN+1];
+	int rc;
+	rc = osmo_gen_home_network_domain(domain, mcc, mnc);
+	if (rc < 0)
+		return rc;
+	return sprintf(out, "mmegi%04x.mme.%s", mmegi, domain);
+}
diff --git a/src/gsm/libosmogsm.map b/src/gsm/libosmogsm.map
index dcc491d..103334b 100644
--- a/src/gsm/libosmogsm.map
+++ b/src/gsm/libosmogsm.map
@@ -318,6 +318,9 @@
 osmo_mnc_from_str;
 osmo_mnc_cmp;
 osmo_plmn_cmp;
+osmo_gen_home_network_domain;
+osmo_gen_mme_domain;
+osmo_gen_mme_group_domain;
 gsm48_chan_mode_names;
 gsm_chan_t_names;
 gsm48_pdisc_names;

-- 
To view, visit https://gerrit.osmocom.org/11411
To unsubscribe, or for help writing mail filters, visit https://gerrit.osmocom.org/settings

Gerrit-Project: libosmocore
Gerrit-Branch: master
Gerrit-MessageType: newchange
Gerrit-Change-Id: Ia882d9db05ec0037e593aeebea21bc31adb680bb
Gerrit-Change-Number: 11411
Gerrit-PatchSet: 1
Gerrit-Owner: Harald Welte <laforge at gnumonks.org>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.osmocom.org/pipermail/gerrit-log/attachments/20181021/1c0dd9f0/attachment.htm>