diff mbox series

[v2] isimodem: parse extra details from REG_STATUS_IND

Message ID 20231125201451.224574-1-absicsz@gmail.com (mailing list archive)
State Accepted, archived
Headers show
Series [v2] isimodem: parse extra details from REG_STATUS_IND | expand

Commit Message

Sicelo A. Mhlongo Nov. 25, 2023, 7:50 p.m. UTC
Extract additional operator information available in REG_STATUS_IND messages.
These include mnc, mnc, and different variations of operator name.

Additionally, in case NET_OPER_NAME_READ_RESP is an error result, which happens
with some operators, report the extracted information to core instead.
---
Changes in v2:
 - use l_strlcpy in place of strncpy
 - replace early `return` statements with `break` in reg_status_ind_cb
 - check abbrev, fn, and an for NULL
 - add alt_method label for alternative operator name method in order to
     resolve compilation issue involving nested ifs
---
 drivers/isimodem/debug.c                |  1 +
 drivers/isimodem/network-registration.c | 78 ++++++++++++++++++++++++-
 drivers/isimodem/network.h              |  1 +
 3 files changed, 77 insertions(+), 3 deletions(-)

Comments

Denis Kenzior Nov. 29, 2023, 3:32 a.m. UTC | #1
Hi Sicelo,

On 11/25/23 13:50, Sicelo A. Mhlongo wrote:
> Extract additional operator information available in REG_STATUS_IND messages.
> These include mnc, mnc, and different variations of operator name.
> 
> Additionally, in case NET_OPER_NAME_READ_RESP is an error result, which happens
> with some operators, report the extracted information to core instead.
> ---
> Changes in v2:
>   - use l_strlcpy in place of strncpy
>   - replace early `return` statements with `break` in reg_status_ind_cb
>   - check abbrev, fn, and an for NULL
>   - add alt_method label for alternative operator name method in order to
>       resolve compilation issue involving nested ifs
> ---
>   drivers/isimodem/debug.c                |  1 +
>   drivers/isimodem/network-registration.c | 78 ++++++++++++++++++++++++-
>   drivers/isimodem/network.h              |  1 +
>   3 files changed, 77 insertions(+), 3 deletions(-)
> 

I re-flowed the commit description a bit just to make it look nicer in git log. 
Applied, thanks.

Regards,
-Denis
diff mbox series

Patch

diff --git a/drivers/isimodem/debug.c b/drivers/isimodem/debug.c
index 18055791..8edcd972 100644
--- a/drivers/isimodem/debug.c
+++ b/drivers/isimodem/debug.c
@@ -1190,6 +1190,7 @@  const char *net_subblock_name(enum net_subblock value)
 		_(NET_REGISTRATION_CONF1_INFO);
 		_(NET_ROAMING_CONF1_INFO);
 		_(NET_AVAIL_NETWORK_INFO_COMMON);
+		_(NET_REG_STATUS_IND_OPER_NAME);
 		_(NET_OPER_NAME_INFO);
 	}
 	return "NET_<UNKNOWN>";
diff --git a/drivers/isimodem/network-registration.c b/drivers/isimodem/network-registration.c
index 8f70b3ee..1baa4d33 100644
--- a/drivers/isimodem/network-registration.c
+++ b/drivers/isimodem/network-registration.c
@@ -28,6 +28,7 @@ 
 #include <string.h>
 #include <errno.h>
 
+#include <ell/ell.h>
 #include <glib.h>
 
 #include <gisi/message.h>
@@ -80,6 +81,8 @@  struct netreg_data {
 	struct rat_info rat;
 	GIsiVersion version;
 	char nitz_name[OFONO_MAX_OPERATOR_NAME_LENGTH + 1];
+	char mcc[OFONO_MAX_MCC_LENGTH + 1];
+	char mnc[OFONO_MAX_MNC_LENGTH + 1];
 };
 
 static inline guint8 *mccmnc_to_bcd(const char *mcc, const char *mnc,
@@ -193,6 +196,12 @@  static void reg_status_ind_cb(const GIsiMessage *msg, void *data)
 	struct netreg_data *nd = ofono_netreg_get_data(netreg);
 	GIsiSubBlockIter iter;
 
+	uint8_t len = 0;
+	uint8_t type = 0;
+	char *abbrev = NULL;
+	char *an = NULL;
+	char *fn = NULL;
+
 	if (netreg == NULL || nd == NULL)
 		return;
 
@@ -208,17 +217,67 @@  static void reg_status_ind_cb(const GIsiMessage *msg, void *data)
 		case NET_REG_INFO_COMMON:
 
 			if (!parse_common_info(&iter, &nd->reg))
-				return;
+				break;
+
+			/* Parse abbreviated operator name */
+			if (!g_isi_sb_iter_get_byte(&iter, &len, 7))
+				break;
+
+			len *= 2;
+
+			g_isi_sb_iter_get_alpha_tag(&iter, &abbrev, len, 8);
 			break;
 
 		case NET_GSM_REG_INFO:
 
 			if (!parse_gsm_info(&iter, &nd->gsm))
-				return;
+				break;
+
+			/* Parse mcc and mnc */
+			g_isi_sb_iter_get_oper_code(&iter, nd->mcc,
+							   nd->mnc, 8);
+			break;
+
+		case NET_REG_STATUS_IND_OPER_NAME:
+
+			if (!g_isi_sb_iter_get_byte(&iter, &type, 2))
+				break;
+
+			if (!g_isi_sb_iter_get_byte(&iter, &len, 5))
+				break;
+
+			/* Name is UCS-2 encoded */
+			len *= 2;
+
+			switch (type) {
+			case 2:
+				/*
+				 * Alternate full name, which is similar to
+				 * long name, but may have less whitespace
+				 */
+				g_isi_sb_iter_get_alpha_tag(&iter, &an, len, 6);
+				break;
+			case 3:
+				/* Full name */
+				g_isi_sb_iter_get_alpha_tag(&iter, &fn, len, 6);
+				break;
+			}
+
 			break;
 		}
 	}
 
+	if (fn && fn[0] != '\0')
+		l_strlcpy(nd->nitz_name, fn, sizeof(nd->nitz_name));
+	else if (an && an[0] != '\0')
+		l_strlcpy(nd->nitz_name, an, sizeof(nd->nitz_name));
+	else if (abbrev && abbrev[0] != '\0')
+		l_strlcpy(nd->nitz_name, abbrev, sizeof(nd->nitz_name));
+
+	g_free(an);
+	g_free(fn);
+	g_free(abbrev);
+
 	ofono_netreg_status_notify(netreg, isi_status_to_at_status(&nd->reg),
 					nd->gsm.lac, nd->gsm.ci,
 					isi_to_at_tech(&nd->rat, &nd->gsm));
@@ -458,6 +517,8 @@  static void name_get_resp_cb(const GIsiMessage *msg, void *data)
 {
 	struct isi_cb_data *cbd = data;
 	ofono_netreg_operator_cb_t cb = cbd->cb;
+	struct ofono_netreg *netreg = cbd->user;
+	struct netreg_data *nd = ofono_netreg_get_data(netreg);
 	struct ofono_network_operator op;
 
 	GIsiSubBlockIter iter;
@@ -468,7 +529,7 @@  static void name_get_resp_cb(const GIsiMessage *msg, void *data)
 
 	if (!check_response_status(msg, NET_OLD_OPER_NAME_READ_RESP) &&
 			!check_response_status(msg, NET_OPER_NAME_READ_RESP))
-		goto error;
+		goto alt_method;
 
 	for (g_isi_sb_iter_init(&iter, msg, 6);
 			g_isi_sb_iter_is_valid(&iter);
@@ -500,9 +561,20 @@  static void name_get_resp_cb(const GIsiMessage *msg, void *data)
 		}
 	}
 
+success:
 	CALLBACK_WITH_SUCCESS(cb, &op, cbd->data);
 	return;
 
+alt_method:
+	if (nd->nitz_name[0] == '\0' || nd->mcc[0] == '\0' ||
+					nd->mnc[0] == '\0')
+		goto error;
+
+	l_strlcpy(op.name, nd->nitz_name, sizeof(op.name));
+	l_strlcpy(op.mcc, nd->mcc, sizeof(op.mcc));
+	l_strlcpy(op.mnc, nd->mnc, sizeof(op.mnc));
+	goto success;
+
 error:
 	CALLBACK_WITH_FAILURE(cb, NULL, cbd->data);
 }
diff --git a/drivers/isimodem/network.h b/drivers/isimodem/network.h
index 7449a1d0..3282b383 100644
--- a/drivers/isimodem/network.h
+++ b/drivers/isimodem/network.h
@@ -90,6 +90,7 @@  enum net_subblock {
 	NET_REGISTRATION_CONF1_INFO =			0x59,
 	NET_ROAMING_CONF1_INFO =			0x5A,
 	NET_AVAIL_NETWORK_INFO_COMMON =			0xE1,
+	NET_REG_STATUS_IND_OPER_NAME =                  0xE3,
 	NET_OPER_NAME_INFO =				0xE7,
 };