/*
* Copyright (C) 2014 BlueKitchen GmbH
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the copyright holders nor the names of
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
* 4. Any redistribution, use, or modification is done solely for
* personal benefit and not for any commercial purpose or for
* monetary gain.
*
* THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS
* RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
* THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* Please inquire about commercial licensing options at
* contact@bluekitchen-gmbh.com
*
*/
#define __BTSTACK_FILE__ "pan_lwip_http_server.c"
// *****************************************************************************
/* EXAMPLE_START(pan_lwip_http_server): PAN - HTTP Server using lwIP
*
* @text Bluetooth PAN is mainly used for Internet Tethering, where e.g. a mobile
* phone provides internet connection to a laptop or a tablet.
*
* Instead of regular internet access, it's also possible to provide a Web app on a
* Bluetooth device, e.g. for configuration or maintenance. For some device,
* this can be a more effective way to provide an interface compared to dedicated
* smartphone applications (for Android and iOS).
*
* Before iOS 11, accessing an HTTP server via Bluetooth PAN was not supported on
* the iPhone, but on iPod and iPad. With iOS 11, this works as expected.
*
* After pairing your device, please open the URL http://192.168.7.1 in your web
* browser.
*/
// *****************************************************************************
#include <stdio.h>
#include <inttypes.h>
#include "btstack_config.h"
#include "bnep_lwip.h"
#include "btstack.h"
#include "lwip/init.h"
#include "lwip/opt.h"
#include "lwip/tcpip.h"
#include "lwip/apps/fs.h"
#include "lwip/apps/httpd.h"
#include "dhserver.h"
#if defined(LWIP_HTTPD_CUSTOM_FILES) && defined(LWIP_HTTPD_DYNAMIC_HEADERS)
#define ENABLE_TEST_FILE_DOWNLOAD
#else
#warning "Test file download requires LWIP_HTTPD_CUSTOM_FILES and LWIP_HTTPD_DYNAMIC_HEADERS to be defined. Not supported currently."
#endif
// network types
#define NETWORK_TYPE_IPv4 0x0800
#define NETWORK_TYPE_ARP 0x0806
#define NETWORK_TYPE_IPv6 0x86DD
static uint8_t pan_sdp_record[220];
static btstack_packet_callback_registration_t hci_event_callback_registration;
/*
* @section Packet Handler
*
* @text All BNEP events are handled in the platform/bnep_lwip.c BNEP-LWIP Adapter.
* Here, we only print status information and handle pairing requests.
*/
/* 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);
UNUSED(size);
bd_addr_t event_addr;
switch (packet_type) {
case HCI_EVENT_PACKET:
switch (hci_event_packet_get_type(packet)) {
case HCI_EVENT_PIN_CODE_REQUEST:
// inform about pin code request
printf("Pin code request - using '0000'\n");
hci_event_pin_code_request_get_bd_addr(packet, event_addr);
gap_pin_code_response(event_addr, "0000");
break;
case HCI_EVENT_USER_CONFIRMATION_REQUEST:
// inform about user confirmation request
printf("SSP User Confirmation Auto accept\n");
hci_event_user_confirmation_request_get_bd_addr(packet, event_addr);
break;
/* @text BNEP_EVENT_CHANNEL_OPENED is received after a BNEP connection was established or
* or when the connection fails. The status field returns the error code.
*/
case BNEP_EVENT_CHANNEL_OPENED:
if (bnep_event_channel_opened_get_status(packet)) {
printf("BNEP channel open failed, status %02x\n", bnep_event_channel_opened_get_status(packet));
} else {
uint16_t uuid_source = bnep_event_channel_opened_get_source_uuid(packet);
uint16_t uuid_dest = bnep_event_channel_opened_get_destination_uuid(packet);
uint16_t mtu = bnep_event_channel_opened_get_mtu(packet);
bnep_event_channel_opened_get_remote_address(packet, event_addr);
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);
printf("Please open 'http://192.168.7.1' in your web browser: \n");
}
break;
/* @text BNEP_EVENT_CHANNEL_CLOSED is received when the connection gets closed.
*/
case BNEP_EVENT_CHANNEL_CLOSED:
printf("BNEP channel closed\n");
break;
default:
break;
}
break;
default:
break;
}
}
/* LISTING_END */
/* @section PAN BNEP Setup
*
* @text Listing PanBnepSetup shows the setup of the PAN setup
*/
/* LISTING_START(PanBnepSetup): Configure GAP, register PAN NAP servier, register PAN NA SDP record. */
static void pan_bnep_setup(void){
// Discoverable
// Set local name with a template Bluetooth address, that will be automatically
// replaced with a actual address once it is available, i.e. when BTstack boots
// up and starts talking to a Bluetooth module.
gap_set_local_name("PAN HTTP 00:00:00:00:00:00");
gap_discoverable_control(1);
// Major: Networking Device, Minor: Networ Access Point
gap_set_class_of_device(0x20300);
// register for HCI events
hci_event_callback_registration.callback = &packet_handler;
hci_add_event_handler(&hci_event_callback_registration);
// Initialize L2CAP
l2cap_init();
// Initialize BNEP
bnep_init();
// Init SDP
sdp_init();
memset(pan_sdp_record, 0, sizeof(pan_sdp_record));
uint16_t network_packet_types[] = { NETWORK_TYPE_IPv4, NETWORK_TYPE_ARP, 0}; // 0 as end of list
// NAP Network Access Type: Other, 1 MB/s
pan_create_nap_sdp_record(pan_sdp_record, sdp_create_service_record_handle(), network_packet_types, NULL, NULL, BNEP_SECURITY_NONE, PAN_NET_ACCESS_TYPE_OTHER, 1000000, NULL, NULL);
sdp_register_service(pan_sdp_record);
printf("SDP service record size: %u\n", de_get_len((uint8_t*) pan_sdp_record));
// Init BNEP lwIP Adapter
bnep_lwip_init();
// Setup NAP Service via BENP lwIP adapter
bnep_lwip_register_service(BLUETOOTH_SERVICE_CLASS_NAP, 1691);
// register callback - to print state
bnep_lwip_register_packet_handler(packet_handler);
}
/* LISTING_END */
/* @section DHCP Server Configuration
*
* @text Listing DhcpSetup shows the DHCP Server configuration for network 192.168.7.0/8
*/
/* LISTING_START(DhcpSetup): Setup DHCP Server with 3 entries for 192.168.7.0/8. */
#define NUM_DHCP_ENTRY 3
static dhcp_entry_t entries[NUM_DHCP_ENTRY] =
{
/* mac ip address subnet mask lease time */
{ {0}, {192, 168, 7, 2}, {255, 255, 255, 0}, 24 * 60 * 60 },
{ {0}, {192, 168, 7, 3}, {255, 255, 255, 0}, 24 * 60 * 60 },
{ {0}, {192, 168, 7, 4}, {255, 255, 255, 0}, 24 * 60 * 60 }
};
static dhcp_config_t dhcp_config =
{
{192, 168, 7, 1}, 67, /* server address, port */
{0, 0, 0, 0}, /* dns server */
NULL, /* dns suffix */
NUM_DHCP_ENTRY, /* num entry */
entries /* entries */
};
/* LISTING_END */
#ifdef ENABLE_TEST_FILE_DOWNLOAD
/* @section Large File Download
*
* @text Listing LargeFile Shows how a configurable test file for performance tests is generated on the fly.
* The filename is the number of bytes to generate, e.g. /1048576.txt results in a 1MB file.
*/
/* LISTING_START(LargeFile): Provide large file. */
int fs_open_custom(struct fs_file *file, const char *name);
int fs_open_custom(struct fs_file *file, const char *name){
if (*name != '/') return 0;
uint32_t file_size = btstack_atoi(&name[1]);
if (file_size > 0) {
printf("Serving '%s' with %u bytes\n", name, file_size);
/* initialize fs_file correctly */
memset(file, 0, sizeof(struct fs_file));
file->len = file_size;
file->index = 0;
file->flags = FS_FILE_FLAGS_HEADER_PERSISTENT;
return 1;
}
return 0;
}
static uint16_t cgi_buffer_fill(char * cgi_buffer, uint16_t cgi_buffer_size, uint32_t start_pos){
// fill buffer with dots
memset(cgi_buffer, (uint8_t) '.', cgi_buffer_size);
uint16_t cursor = 10;
uint16_t pos = 0;
const uint16_t line_length = 64;
while ((pos + line_length ) < cgi_buffer_size){
// write position
sprintf((char *) &cgi_buffer[pos], "%08"PRIx32, start_pos + pos);
cgi_buffer[pos + 8] = '-';
// cursor
cgi_buffer[pos+cursor] = '+';
cursor++;
// new line
cgi_buffer[pos+line_length-1] = '\n';
pos += line_length;
}
// handle last incomplete line
if (pos == 0){
const char * last_line_text = "Thank you for evaluating BTstack!";
uint16_t bytes_to_copy = btstack_min(strlen(last_line_text), cgi_buffer_size);
memcpy(cgi_buffer, last_line_text, bytes_to_copy);
pos = cgi_buffer_size;
}
return pos;
}
int fs_read_custom(struct fs_file *file, char *buffer, int count);
int fs_read_custom(struct fs_file *file, char *buffer, int count)
{
uint32_t remaining_data = file->len - file->index;
if (remaining_data == 0) {
// all bytes already read
return FS_READ_EOF;
}
uint32_t bytes_to_fill = remaining_data;
if (bytes_to_fill > (uint32_t) count){
bytes_to_fill = count;
}
uint32_t bytes_written = cgi_buffer_fill(buffer, bytes_to_fill, file->index);
file->index += bytes_written;
return bytes_written;
}
void fs_close_custom(struct fs_file *file);
void fs_close_custom(struct fs_file *file){
UNUSED(file);
}
#endif
/* LISTING_END */
/* @section DHCP Server Setup
*
* @text Listing LwipSetup shows the setup of the lwIP network stack and starts the DHCP Server
*/
/* LISTING_START(LwipSetup): Report lwIP version, init lwIP, start DHCP Serverr */
static void network_setup(void){
printf("lwIP version: " LWIP_VERSION_STRING "\n");
#if BYTE_ORDER == LITTLE_ENDIAN
// big endian detection not supported by build configuration
if (btstack_is_big_endian()){
printf("lwIP configured for little endian, but running on big endian. Please set BYTE_ORDER to BIG_ENDIAN in lwiopts.h\n");
while (1);
}
#endif
// init lwIP stack
#if NO_SYS
lwip_init();
#else
tcpip_init(NULL, NULL);
#endif
// start DHCP Server
dhserv_init(&dhcp_config);
// start HTTP Server
httpd_init();
}
/* LISTING_END */
/* @section Main
*
* @text Setup the lwIP network and PAN NAP
*/
/* LISTING_START(Main): Setup lwIP network and PAN NAP */
int btstack_main(int argc, const char * argv[]);
int btstack_main(int argc, const char * argv[]){
(void)argc;
(void)argv;
// setup lwIP, HTTP, DHCP
network_setup();
// setup Classic PAN NAP Service
pan_bnep_setup();
// Turn on the device
hci_power_control(HCI_POWER_ON);
return 0;
}
/* LISTING_END */
/* EXAMPLE_END */