basic l2cap test tool

example/libusb/Makefile

@@ -56,7 +56,7 @@ ATT_OBJ = $(ATT:.c=.o)
 # create firmware image from common objects and example source file
 
 all: ../../include/btstack/version.h ble_client sdp_rfcomm_query sdp_general_query spp_counter ble_peripheral \
-		ble_peripheral_sm_minimal gap_inquiry gap_dedicated_bonding gap_inquiry_and_bond
+		ble_peripheral_sm_minimal gap_inquiry gap_dedicated_bonding gap_inquiry_and_bond l2cap_test
 
 # ble_client_uart #spp-usb l2cap-server-usb l2cap-client-usb l2cap-server-uart l2cap-client-uart
 
@@ -84,6 +84,9 @@ gap_inquiry: ${CORE_OBJ} ${COMMON_OBJ} gap_inquiry.c
 gap_inquiry_and_bond: ${CORE_OBJ} ${COMMON_OBJ} gap_inquiry_and_bond.c
 	${CC} $^ ${CFLAGS} ${LDFLAGS} -o $@
 
+l2cap_test: ${CORE_OBJ} ${COMMON_OBJ} l2cap_test.c
+	${CC} $^ ${CFLAGS} ${LDFLAGS} -o $@
+
 # compile .ble description
 profile.h: profile.gatt
 	python ${BTSTACK_ROOT}/ble/compile-gatt.py $< $@ 

example/libusb/l2cap_test.c

@@ -0,0 +1,132 @@
+
+//*****************************************************************************
+//
+// minimal setup for SDP client over USB or UART
+//
+//*****************************************************************************
+
+#include "btstack-config.h"
+
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+
+#include <btstack/hci_cmds.h>
+#include <btstack/run_loop.h>
+
+#include "hci.h"
+#include "gap.h"
+#include "btstack_memory.h"
+#include "hci_dump.h"
+#include "l2cap.h"
+
+// static bd_addr_t remote = {0x04,0x0C,0xCE,0xE4,0x85,0xD3};
+static bd_addr_t remote = {0x84, 0x38, 0x35, 0x65, 0xD1, 0x15};
+
+typedef enum {
+    W4_OPEN, SEND_ECHO, SEND_DATA, CLOSE_CHANNEL
+} state_t;
+
+static state_t state = W4_OPEN;
+static uint16_t handle;
+static uint16_t local_cid;
+
+static void test_run(){
+    int result;
+    switch (state){
+        case SEND_ECHO:
+            // send echo request
+            result = l2cap_send_echo_request(handle, (uint8_t *)  "Hello World!", 13);
+            printf("L2CAP ECHO Request Sent\n");
+            if (result) break;
+            state++;
+            break;
+        case SEND_DATA:
+            result = l2cap_send_internal(local_cid, (uint8_t *) "0123456789", 10);
+            if (result) break;
+            printf("L2CAP Data Sent\n");
+            state++;
+            break;
+        case CLOSE_CHANNEL:
+            l2cap_disconnect_internal(local_cid, 0);
+            printf("L2CAP Channel Closed\n");
+            state++;
+            break;
+        default:
+            break;
+    }
+}
+
+static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){
+
+    bd_addr_t event_addr;
+    uint16_t psm;
+
+    if (packet_type != HCI_EVENT_PACKET) return;
+
+    switch (packet[0]) {
+        case BTSTACK_EVENT_STATE:
+            // bt stack activated, get started 
+            if (packet[2] == HCI_STATE_WORKING){
+                l2cap_create_channel_internal(NULL, packet_handler, remote, PSM_SDP, 100);
+            }
+            break;
+        case L2CAP_EVENT_CHANNEL_OPENED:
+            // inform about new l2cap connection
+            bt_flip_addr(event_addr, &packet[3]);
+            psm = READ_BT_16(packet, 11); 
+            local_cid = READ_BT_16(packet, 13); 
+            handle = READ_BT_16(packet, 9);
+            if (packet[2] == 0) {
+                printf("Channel successfully opened: %s, handle 0x%02x, psm 0x%02x, local cid 0x%02x, remote cid 0x%02x\n",
+                       bd_addr_to_str(event_addr), handle, psm, local_cid,  READ_BT_16(packet, 15));
+            } else {
+                printf("L2CAP connection to device %s failed. status code %u\n", bd_addr_to_str(event_addr), packet[2]);
+            }
+
+            // let's do our thing
+            state = SEND_ECHO;
+
+            break;
+
+        case DAEMON_EVENT_HCI_PACKET_SENT:
+            test_run();
+            break;
+
+        default:
+            break;
+    }
+}
+
+static void packet_handler2 (void * connection, uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){
+    packet_handler(packet_type, 0, packet, size);
+}
+
+static void btstack_setup(){
+    /// GET STARTED ///
+    btstack_memory_init();
+    run_loop_init(RUN_LOOP_POSIX);
+    
+    hci_dump_open("/tmp/hci_dump.pklg", HCI_DUMP_PACKETLOGGER);
+   
+    hci_transport_t    * transport = hci_transport_usb_instance();
+    hci_uart_config_t  * config = NULL;
+    bt_control_t       * control   = NULL;    
+
+    remote_device_db_t * remote_db = (remote_device_db_t *) &remote_device_db_memory;
+    hci_init(transport, config, control, remote_db);
+
+    l2cap_init();
+    l2cap_register_packet_handler(&packet_handler2);
+
+    // turn on!
+    hci_power_control(HCI_POWER_ON);
+}
+
+int main(void){
+    btstack_setup();
+    run_loop_execute(); 
+    return 0;
+}