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Date:   Mon, 28 Dec 2020 19:34:18 +0800
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Subject: [Bluez PATCH v3 2/4] btmgmt: Add command read-sysconfig
From:   Howard Chung <howardchung@google.com>
To:     linux-bluetooth <linux-bluetooth@vger.kernel.org>,
        luiz.dentz@gmail.com
Cc:     mcchou@chromium.org, mmandlik@chromium.org, apusaka@chromium.org,
        Howard Chung <howardchung@google.com>
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Precedence: bulk

Add command read-sysconfig in btmgmt

Example usage:
localhost ~ # btmgmt
[mgmt]# read-sysconfig
Type: 0x0000    Length: 02      Value: 0000
Type: 0x0001    Length: 02      Value: 0008
...
Type: 0x001f    Length: 01      Value: 01

Reviewed-by: apusaka@chromium.org
---

Changes in v3:
- Removed unused variable in read_sysconfig_rsp

 tools/btmgmt.c | 48 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 48 insertions(+)

diff --git a/tools/btmgmt.c b/tools/btmgmt.c
index 2f7cb2efcc38..7d83d3ee6bd5 100644
--- a/tools/btmgmt.c
+++ b/tools/btmgmt.c
@@ -1752,6 +1752,52 @@ static void cmd_exp_debug(int argc, char **argv)
 	}
 }
 
+static void print_mgmt_tlv(void *data, void *user_data)
+{
+	const struct mgmt_tlv *entry = data;
+	char buf[256];
+
+	bin2hex(entry->value, entry->length, buf, sizeof(buf));
+	print("Type: 0x%04x\tLength: %02hhu\tValue: %s", entry->type,
+							entry->length, buf);
+}
+
+static void read_sysconfig_rsp(uint8_t status, uint16_t len, const void *param,
+							void *user_data)
+{
+	struct mgmt_tlv_list *tlv_list;
+
+	if (status != 0) {
+		error("Read system configuration failed with status "
+				"0x%02x (%s)", status, mgmt_errstr(status));
+		return;
+	}
+
+	tlv_list = mgmt_tlv_list_load_from_buf(param, len);
+	if (!tlv_list) {
+		error("Unable to parse response of read system configuration");
+		return;
+	}
+
+	mgmt_tlv_list_foreach(tlv_list, print_mgmt_tlv, NULL);
+	mgmt_tlv_list_free(tlv_list);
+}
+
+static void cmd_read_sysconfig(int argc, char **argv)
+{
+	uint16_t index;
+
+	index = mgmt_index;
+	if (index == MGMT_INDEX_NONE)
+		index = 0;
+
+	if (!mgmt_send(mgmt, MGMT_OP_READ_DEF_SYSTEM_CONFIG, index,
+			0, NULL, read_sysconfig_rsp, NULL, NULL)) {
+		error("Unable to send read system configuration cmd");
+		return bt_shell_noninteractive_quit(EXIT_FAILURE);
+	}
+}
+
 static void auto_power_enable_rsp(uint8_t status, uint16_t len,
 					const void *param, void *user_data)
 {
@@ -5030,6 +5076,8 @@ static const struct bt_shell_menu main_menu = {
 		cmd_expinfo,		"Show experimental features"	},
 	{ "exp-debug",		"<on/off>",
 		cmd_exp_debug,		"Set debug feature"		},
+	{ "read-sysconfig",	NULL,
+		cmd_read_sysconfig,	"Read System Configuration"	},
 	{} },
 };
 
-- 
2.29.2.729.g45daf8777d-goog