R#33045 Merge SNMP Fix For EXT/LAN5 To GNX-11

Merge commit : cd2778a4c9cb30210d1823ff90d2f50fbc8f3b28
to GNX-11.

Cherry-picked and tested on GNX-11.

Change-Id: I9693b06a2942c9920efcb8a52ef56d2a5846eb60

net/net-snmp/src/if-mib/if_handlers.c

@@ -108,6 +108,108 @@ out:
 	return rc;
 }
 
+/*
+ * Return link status of the LAN/EXT5 port.
+ * @return status success (1) or failure (0).
+ */
+static int get_lan_ext5_link_status(void)
+{
+	int ret = 0;
+	char val[64] = {0};
+
+	char *cmd = "ethctl phy ext 0x14 0x00 | grep mii | awk '{ print $5 }'";
+	FILE *fp = popen(cmd, "r");
+	if (!fp) {
+		return ret;
+	}
+
+	if ((fgets(val, sizeof(val), fp) != NULL) && (strncmp(val, "0x", 2) == 0)) {
+		// Skip first two characters (0x) for conversion
+		int phy_status = (int)strtol(val + 2, NULL, 16);
+		int BIT_100M = (1 << 8);
+		int BIT_1000M = (2 << 8);
+		// Check if 8th (100M) or 9th (1000M) bit is set in phy_status, then link up
+		if ((phy_status & BIT_100M) == BIT_100M ||
+			(phy_status & BIT_1000M) == BIT_1000M) {
+			ret = 1; // Link up
+		}
+	}
+
+	pclose(fp);
+	return ret;
+}
+
+/*
+ * check if board supported for LAN/EXT5 port.
+ * @return status success (1) or failure (0).
+ */
+static int is_board_supported(void)
+{
+	int ret = 0;
+	char *model_name = NULL;
+	json_object *router_system_info = NULL;
+
+	snmp_ubus_call("router.system", "info", UBUS_ARGS{}, 0, &router_system_info);
+	snmp_json_get_value_in_obj(&model_name, router_system_info, 1, "model_name");
+	if (strncmp(model_name, "XG6846B", 7) == 0) {
+		ret = 1; // Board name Supported
+	}
+
+	snmp_json_obj_release(router_system_info);
+	return ret;
+}
+
+/*
+ * check if ifname matches with ifname of LAN/EXT5 port.
+ * @param ifname interface: interface.
+ * @return status success (1) or failure (0).
+ */
+int check_if_lan_ext5_port(const char *ifname)
+{
+	int ret = 0;
+	if (!is_board_supported()) {
+		return ret;
+	}
+
+	json_object *res = NULL;
+	struct json_object *section = NULL;
+	struct json_object *values = NULL;
+	struct json_object_iterator it;
+	struct json_object_iterator itEnd;
+	char *obj_value = NULL;
+	snmp_ubus_call("uci", "get", UBUS_ARGS{{"config", "ports", String}}, 1, &res);
+	json_object_object_get_ex(res, "values", &values);
+	it = json_object_iter_begin(values);
+	itEnd = json_object_iter_end(values);
+
+	while (!json_object_iter_equal(&it, &itEnd)) {
+		/*Getting hold of the required section, to get its "ifname" value.*/
+		section = NULL;
+		obj_value = NULL;
+		section = json_object_iter_peek_value(&it);
+		snmp_json_get_value_in_obj(&obj_value, section, 1, "ifname");
+		if (strncmp(obj_value, ifname, strlen(obj_value)) == 0) {
+			char *obj_value2 = NULL;
+			snmp_json_get_value_in_obj(&obj_value2, section, 1, "name");
+			if (strncmp(obj_value2, "EXT/LAN5", strlen(obj_value2)) == 0) {
+				ret = 1;
+			}
+
+			break;
+		}
+
+		snmp_json_obj_release(section);
+		json_object_iter_next(&it);
+	}
+
+	snmp_json_obj_release(res);
+	snmp_json_obj_release(values);
+	snmp_json_obj_release(section);
+
+	return ret;
+}
+
+
 /*
  * Return operational state of the interface
  * @param ifname interface: wan or lan interface
@@ -121,11 +223,20 @@ static int get_operational_status(const char *ifname)
 	if (ifname == NULL)
 		return IFOPERSTATUS_DOWN;
 
-	snprintf(file, sizeof(file), "/sys/class/net/%s/operstate", ifname);
-	read_sysfs_file(file, val, sizeof(val));
+	if (check_if_lan_ext5_port(ifname)) {
+		int link = get_lan_ext5_link_status();
+		if (link) {
+			return IFOPERSTATUS_UP;
+		}
+
+	} else {
+		snprintf(file, sizeof(file), "/sys/class/net/%s/operstate", ifname);
+		read_sysfs_file(file, val, sizeof(val));
+
+		if (strncmp(val, "up", 2) == 0)
+			return IFOPERSTATUS_UP;
 
-	if (strncmp(val, "up", 2) == 0)
-		return IFOPERSTATUS_UP;
+	}
 
 	return IFOPERSTATUS_DOWN;
 }