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network: extract POSIX network code into btstack_network_posix and use in panu_demo

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This commit is contained in:
Matthias Ringwald 2017-11-07 16:42:06 +01:00
parent b2cc109c9c
commit a7473022f2
4 changed files with 41 additions and 229 deletions
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255
example/panu_demo.c
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@ -52,39 +52,9 @@
* Note: currently supported only on Linux and Mac.
*/
#include "btstack_config.h"
#include <arpa/inet.h>
#include <errno.h>
#include <fcntl.h>
#include <ifaddrs.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <net/if_arp.h>
#ifdef __APPLE__
#include <net/if.h>
#include <net/if_types.h>
#include <netinet/if_ether.h>
#include <netinet/in.h>
#endif
#include <sys/ioctl.h>
#include <sys/param.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/types.h>
#ifdef __linux
#include <linux/if.h>
#include <linux/if_tun.h>
#endif
#include "btstack_config.h"
#include "btstack.h"
static int record_id = -1;
@ -100,31 +70,18 @@ static uint32_t sdp_bnep_remote_uuid = 0;
static uint8_t attribute_value[1000];
static const unsigned int attribute_value_buffer_size = sizeof(attribute_value);
// MBP 2016 static const char * remote_addr_string = "F4-0F-24-3B-1B-E1";
// Wiko Sunny
static const char * remote_addr_string = "A0:4C:5B:0F:B2:42";
// MBP 2016
static const char * remote_addr_string = "F4-0F-24-3B-1B-E1";
// Wiko Sunny static const char * remote_addr_string = "A0:4C:5B:0F:B2:42";
static bd_addr_t remote_addr;
static int tap_fd = -1;
static uint8_t network_buffer[BNEP_MTU_MIN];
static size_t network_buffer_len = 0;
#ifdef __APPLE__
// tuntaposx provides fixed set of tapX devices
static const char * tap_dev = "/dev/tap0";
static char tap_dev_name[16] = "tap0";
#endif
#ifdef __linux
// Linux uses single control device to bring up tunX or tapX interface
static const char * tap_dev = "/dev/net/tun";
static char tap_dev_name[16] = "bnep%d";
#endif
static btstack_data_source_t tap_dev_ds;
static btstack_packet_callback_registration_t hci_event_callback_registration;
// outgoing network packet
static const uint8_t * network_buffer;
static uint16_t network_buffer_len;
/* @section Main application configuration
*
* @text In the application configuration, L2CAP and BNEP are initialized and a BNEP service, for server mode,
@ -134,6 +91,7 @@ static btstack_packet_callback_registration_t hci_event_callback_registration;
/* LISTING_START(PanuSetup): Panu setup */
static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size);
static void handle_sdp_client_query_result(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size);
static void network_send_packet_callback(const uint8_t * packet, uint16_t size);
static void panu_setup(void){
@ -146,146 +104,12 @@ static void panu_setup(void){
// Initialise BNEP
bnep_init();
// Minimum L2CAP MTU for bnep is 1691 bytes
bnep_register_service(packet_handler, BLUETOOTH_SERVICE_CLASS_PANU, 1691);
}
/* LISTING_END */
/* @section TUN / TAP interface routines
*
* @text This example requires a TUN/TAP interface to connect the Bluetooth network interface
* with the native system. It has been tested on Linux and OS X, but should work on any
* system that provides TUN/TAP with minor modifications.
*
* On Linux, TUN/TAP is available by default. On OS X, tuntaposx from
* http://tuntaposx.sourceforge.net needs to be installed.
*
* The *tap_alloc* function sets up a virtual network interface with the given Bluetooth Address.
* It is rather low-level as it sets up and configures a network interface.
*/
static int tap_alloc(char *dev, bd_addr_t bd_addr)
{
struct ifreq ifr;
int fd_dev;
int fd_socket;
if( (fd_dev = open(tap_dev, O_RDWR)) < 0 ) {
fprintf(stderr, "TAP: Error opening %s: %s\n", tap_dev, strerror(errno));
return -1;
}
#ifdef __linux
memset(&ifr, 0, sizeof(ifr));
ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
if( *dev ) {
strncpy(ifr.ifr_name, dev, IFNAMSIZ);
}
int err;
if( (err = ioctl(fd_dev, TUNSETIFF, (void *) &ifr)) < 0 ) {
fprintf(stderr, "TAP: Error setting device name: %s\n", strerror(errno));
close(fd_dev);
return -1;
}
strcpy(dev, ifr.ifr_name);
#endif
#ifdef __APPLE__
dev = tap_dev_name;
#endif
fd_socket = socket(PF_INET, SOCK_DGRAM, IPPROTO_IP);
if (fd_socket < 0) {
close(fd_dev);
fprintf(stderr, "TAP: Error opening netlink socket: %s\n", strerror(errno));
return -1;
}
// Configure the MAC address of the newly created bnep(x)
// device to the local bd_address
memset (&ifr, 0, sizeof(struct ifreq));
strcpy(ifr.ifr_name, dev);
#ifdef __linux
ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
memcpy(ifr.ifr_hwaddr.sa_data, bd_addr, sizeof(bd_addr_t));
if (ioctl(fd_socket, SIOCSIFHWADDR, &ifr) == -1) {
close(fd_dev);
close(fd_socket);
fprintf(stderr, "TAP: Error setting hw addr: %s\n", strerror(errno));
exit(1);
return -1;
}
#endif
#ifdef __APPLE__
ifr.ifr_addr.sa_len = ETHER_ADDR_LEN;
ifr.ifr_addr.sa_family = AF_LINK;
(void)memcpy(ifr.ifr_addr.sa_data, bd_addr, ETHER_ADDR_LEN);
if (ioctl(fd_socket, SIOCSIFLLADDR, &ifr) == -1) {
close(fd_dev);
close(fd_socket);
fprintf(stderr, "TAP: Error setting hw addr: %s\n", strerror(errno));
exit(1);
return -1;
}
#endif
// Bring the interface up
if (ioctl(fd_socket, SIOCGIFFLAGS, &ifr) == -1) {
close(fd_dev);
close(fd_socket);
fprintf(stderr, "TAP: Error reading interface flags: %s\n", strerror(errno));
return -1;
}
if ((ifr.ifr_flags & IFF_UP) == 0) {
ifr.ifr_flags |= IFF_UP;
if (ioctl(fd_socket, SIOCSIFFLAGS, &ifr) == -1) {
close(fd_dev);
close(fd_socket);
fprintf(stderr, "TAP: Error set IFF_UP: %s\n", strerror(errno));
return -1;
}
}
close(fd_socket);
return fd_dev;
}
/*
* @text Listing processTapData shows how a packet is received from the TAP network interface
* and forwarded over the BNEP connection.
*
* After successfully reading a network packet, the call to
* the *bnep_can_send_packet_now* function checks, if BTstack can forward
* a network packet now. If that's not possible, the received data stays
* in the network buffer and the data source elements is removed from the
* run loop. The *process_tap_dev_data* function will not be called until
* the data source is registered again. This provides a basic flow control.
*/
/* LISTING_START(processTapData): Process incoming network packets */
static void process_tap_dev_data(btstack_data_source_t *ds, btstack_data_source_callback_type_t callback_type)
{
UNUSED(ds);
UNUSED(callback_type);
ssize_t len;
len = read(ds->fd, network_buffer, sizeof(network_buffer));
if (len <= 0){
fprintf(stderr, "TAP: Error while reading: %s\n", strerror(errno));
return;
}
network_buffer_len = len;
// disable reading from netif
btstack_run_loop_disable_data_source_callbacks(&tap_dev_ds, DATA_SOURCE_CALLBACK_READ);
// request permission to send
bnep_request_can_send_now_event(bnep_cid);
// Initialize network interface
btstack_network_init(&network_send_packet_callback);
}
/* LISTING_END */
@ -443,14 +267,12 @@ static void handle_sdp_client_query_result(uint8_t packet_type, uint16_t channel
* @text The packet handler responds to various HCI Events.
*/
/* LISTING_START(packetHandler): Packet Handler */
static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size)
{
/* LISTING_PAUSE */
UNUSED(channel);
int rc;
uint8_t event;
bd_addr_t event_addr;
bd_addr_t local_addr;
@ -506,22 +328,11 @@ static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *pack
uuid_source = bnep_event_channel_opened_get_source_uuid(packet);
uuid_dest = bnep_event_channel_opened_get_destination_uuid(packet);
mtu = bnep_event_channel_opened_get_mtu(packet);
//bt_flip_addr(event_addr, &packet[9]);
memcpy(&event_addr, &packet[11], sizeof(bd_addr_t));
printf("BNEP connection open succeeded to %s source UUID 0x%04x dest UUID: 0x%04x, max frame size %u\n", bd_addr_to_str(event_addr), uuid_source, uuid_dest, mtu);
/* Create the tap interface */
/* Setup network interface */
gap_local_bd_addr(local_addr);
tap_fd = tap_alloc(tap_dev_name, local_addr);
if (tap_fd < 0) {
printf("Creating BNEP tap device failed: %s\n", strerror(errno));
} else {
printf("BNEP device \"%s\" allocated.\n", tap_dev_name);
/* Create and register a new runloop data source */
btstack_run_loop_set_data_source_fd(&tap_dev_ds, tap_fd);
btstack_run_loop_set_data_source_handler(&tap_dev_ds, &process_tap_dev_data);
btstack_run_loop_add_data_source(&tap_dev_ds);
btstack_run_loop_enable_data_source_callbacks(&tap_dev_ds, DATA_SOURCE_CALLBACK_READ);
}
btstack_network_up(local_addr);
}
break;
@ -536,11 +347,7 @@ static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *pack
*/
case BNEP_EVENT_CHANNEL_CLOSED:
printf("BNEP channel closed\n");
btstack_run_loop_remove_data_source(&tap_dev_ds);
if (tap_fd > 0) {
close(tap_fd);
tap_fd = -1;
}
btstack_network_down();
break;
/* @text BNEP_EVENT_CAN_SEND_NOW indicates that a new packet can be send. This triggers the send of a
@ -548,10 +355,9 @@ static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *pack
*/
case BNEP_EVENT_CAN_SEND_NOW:
if (network_buffer_len > 0) {
bnep_send(bnep_cid, network_buffer, network_buffer_len);
bnep_send(bnep_cid, (uint8_t*) network_buffer, network_buffer_len);
network_buffer_len = 0;
// Re-enable the tap device data source
btstack_run_loop_enable_data_source_callbacks(&tap_dev_ds, DATA_SOURCE_CALLBACK_READ);
btstack_network_packet_sent();
}
break;
@ -564,16 +370,8 @@ static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *pack
* It is forwarded to the TAP interface.
*/
case BNEP_DATA_PACKET:
// Write out the ethernet frame to the tap device
if (tap_fd > 0) {
rc = write(tap_fd, packet, size);
if (rc < 0) {
fprintf(stderr, "TAP: Could not write to TAP device: %s\n", strerror(errno));
} else
if (rc != size) {
fprintf(stderr, "TAP: Package written only partially %d of %d bytes\n", rc, size);
}
}
// Write out the ethernet frame to the network interface
btstack_network_process_packet(packet, size);
break;
default:
@ -582,6 +380,19 @@ static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *pack
}
/* LISTING_END */
/*
* @section Network packet handler
*
* @text A pointer to the network packet is stored and a BNEP_EVENT_CAN_SEND_NOW requested
*/
/* LISTING_START(networkPacketHandler): Network Packet Handler */
static void network_send_packet_callback(const uint8_t * packet, uint16_t size){
network_buffer = packet;
network_buffer_len = size;
bnep_request_can_send_now_event(bnep_cid);
}
/* LISTING_END */
int btstack_main(int argc, const char * argv[]);
int btstack_main(int argc, const char * argv[]){

2
port/libusb/Makefile
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@ -3,7 +3,7 @@ BTSTACK_ROOT = ../..
CORE += main.c btstack_stdin_posix.c
COMMON += hci_transport_h2_libusb.c btstack_run_loop_posix.c le_device_db_fs.c btstack_link_key_db_fs.c wav_util.c
COMMON += hci_transport_h2_libusb.c btstack_run_loop_posix.c le_device_db_fs.c btstack_link_key_db_fs.c wav_util.c btstack_network_posix.c
include ${BTSTACK_ROOT}/example/Makefile.inc

3
src/btstack.h
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@ -59,6 +59,7 @@
#include "btstack_linked_list.h"
#include "btstack_memory.h"
#include "btstack_memory_pool.h"
#include "btstack_network.h"
#include "btstack_run_loop.h"
#include "btstack_stdin.h"
#include "btstack_util.h"
@ -112,4 +113,4 @@
// #endif
#endif // __BTSTACK_H

10
src/btstack_network.h
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@ -43,14 +43,14 @@
#define __BTSTACK_NETWORK_H
#include <stdint.h>
#include "btstack_defines.h"
#include "bluetooth.h"
#if defined __cplusplus
extern "C" {
#endif
/**
* @brief Initialise network interface
* @brief Initialize network interface
* @param send_packet_callback
*/
void btstack_network_init(void (*send_packet_callback)(const uint8_t * packet, uint16_t size));
@ -63,7 +63,7 @@ void btstack_network_init(void (*send_packet_callback)(const uint8_t * packet, u
int btstack_network_up(bd_addr_t network_address);
/**
* @brief Bring up network interfacd
* @brief Shut down network interfacd
* @param network_address
* @return 0 if ok
*/
@ -74,10 +74,10 @@ int btstack_network_down(void);
* @param packet
* @param size
*/
uint8_t btstack_network_process_packet(const uint8_t * packet, uint16_t size);
void btstack_network_process_packet(const uint8_t * packet, uint16_t size);
/**
* @brief Notify network interface that packet from send_packet_callback was sent and the next packet could be delivered
* @brief Notify network interface that packet from send_packet_callback was sent and the next packet can be delivered.
*/
void btstack_network_packet_sent(void);