1 /* 2 * Copyright (C) 2014 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 24 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #define __BTSTACK_FILE__ "pan_lwip_http_server.c" 39 40 // ***************************************************************************** 41 /* EXAMPLE_START(pan_lwip_http_server): PAN - HTTP Server using lwIP 42 * 43 * @text Bluetooth PAN is mainly used for Internet Tethering, where e.g. a mobile 44 * phone provides internet connection to a laptop or a tablet. 45 * 46 * Instead of regular internet access, it's also possible to provide a Web app on a 47 * Bluetooth device, e.g. for configuration or maintenance. For some device, 48 * this can be a more effective way to provide an interface compared to dedicated 49 * smartphone applications (for Android and iOS). 50 * 51 * Before iOS 11, accessing an HTTP server via Bluetooth PAN was not supported on 52 * the iPhone, but on iPod and iPad. With iOS 11, this works as expected. 53 * 54 * After pairing your device, please open the URL http://192.168.7.1 in your web 55 * browser. 56 57 */ 58 // ***************************************************************************** 59 60 #include <stdio.h> 61 #include <inttypes.h> 62 63 #include "btstack_config.h" 64 #include "bnep_lwip.h" 65 #include "btstack.h" 66 67 #include "lwip/init.h" 68 #include "lwip/opt.h" 69 #include "lwip/tcpip.h" 70 #include "lwip/apps/fs.h" 71 #include "lwip/apps/httpd.h" 72 #include "dhserver.h" 73 74 #if !LWIP_HTTPD_CUSTOM_FILES 75 #error This needs LWIP_HTTPD_CUSTOM_FILES 76 #endif 77 #if !LWIP_HTTPD_DYNAMIC_HEADERS 78 #error This needs LWIP_HTTPD_DYNAMIC_HEADERS 79 #endif 80 81 // network types 82 #define NETWORK_TYPE_IPv4 0x0800 83 #define NETWORK_TYPE_ARP 0x0806 84 #define NETWORK_TYPE_IPv6 0x86DD 85 86 static uint8_t pan_sdp_record[220]; 87 88 static btstack_packet_callback_registration_t hci_event_callback_registration; 89 90 /* 91 * @section Packet Handler 92 * 93 * @text All BNEP events are handled in the platform/bnep_lwip.c BNEP-LWIP Adapter. 94 * Here, we only print status information and handle pairing requests. 95 */ 96 97 /* LISTING_START(packetHandler): Packet Handler */ 98 static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 99 /* LISTING_PAUSE */ 100 UNUSED(channel); 101 UNUSED(size); 102 103 bd_addr_t event_addr; 104 105 switch (packet_type) { 106 case HCI_EVENT_PACKET: 107 switch (hci_event_packet_get_type(packet)) { 108 109 case HCI_EVENT_PIN_CODE_REQUEST: 110 // inform about pin code request 111 printf("Pin code request - using '0000'\n"); 112 hci_event_pin_code_request_get_bd_addr(packet, event_addr); 113 gap_pin_code_response(event_addr, "0000"); 114 break; 115 116 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 117 // inform about user confirmation request 118 printf("SSP User Confirmation Auto accept\n"); 119 hci_event_user_confirmation_request_get_bd_addr(packet, event_addr); 120 break; 121 122 /* @text BNEP_EVENT_CHANNEL_OPENED is received after a BNEP connection was established or 123 * or when the connection fails. The status field returns the error code. 124 */ 125 case BNEP_EVENT_CHANNEL_OPENED: 126 if (bnep_event_channel_opened_get_status(packet)) { 127 printf("BNEP channel open failed, status %02x\n", bnep_event_channel_opened_get_status(packet)); 128 } else { 129 uint16_t uuid_source = bnep_event_channel_opened_get_source_uuid(packet); 130 uint16_t uuid_dest = bnep_event_channel_opened_get_destination_uuid(packet); 131 uint16_t mtu = bnep_event_channel_opened_get_mtu(packet); 132 bnep_event_channel_opened_get_remote_address(packet, event_addr); 133 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); 134 printf("Please open 'http://192.168.7.1' in your web browser: \n"); 135 } 136 break; 137 138 /* @text BNEP_EVENT_CHANNEL_CLOSED is received when the connection gets closed. 139 */ 140 case BNEP_EVENT_CHANNEL_CLOSED: 141 printf("BNEP channel closed\n"); 142 break; 143 144 default: 145 break; 146 } 147 break; 148 default: 149 break; 150 } 151 } 152 /* LISTING_END */ 153 154 /* @section PAN BNEP Setup 155 * 156 * @text Listing PanBnepSetup shows the setup of the PAN setup 157 */ 158 159 /* LISTING_START(PanBnepSetup): Configure GAP, register PAN NAP servier, register PAN NA SDP record. */ 160 static void pan_bnep_setup(void){ 161 162 // Discoverable 163 // Set local name with a template Bluetooth address, that will be automatically 164 // replaced with a actual address once it is available, i.e. when BTstack boots 165 // up and starts talking to a Bluetooth module. 166 gap_set_local_name("PAN HTTP 00:00:00:00:00:00"); 167 gap_discoverable_control(1); 168 169 // register for HCI events 170 hci_event_callback_registration.callback = &packet_handler; 171 hci_add_event_handler(&hci_event_callback_registration); 172 173 // Initialize L2CAP 174 l2cap_init(); 175 176 // Initialize BNEP 177 bnep_init(); 178 179 // Init SDP 180 sdp_init(); 181 memset(pan_sdp_record, 0, sizeof(pan_sdp_record)); 182 uint16_t network_packet_types[] = { NETWORK_TYPE_IPv4, NETWORK_TYPE_ARP, 0}; // 0 as end of list 183 184 // NAP Network Access Type: Other, 1 MB/s 185 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); 186 sdp_register_service(pan_sdp_record); 187 printf("SDP service record size: %u\n", de_get_len((uint8_t*) pan_sdp_record)); 188 189 // Init BNEP lwIP Adapter 190 bnep_lwip_init(); 191 192 // Setup NAP Service via BENP lwIP adapter 193 bnep_lwip_register_service(BLUETOOTH_SERVICE_CLASS_NAP, 1691); 194 195 // register callback - to print state 196 bnep_lwip_register_packet_handler(packet_handler); 197 } 198 /* LISTING_END */ 199 200 201 /* @section DHCP Server Configuration 202 * 203 * @text Listing DhcpSetup shows the DHCP Server configuration for network 192.168.7.0/8 204 */ 205 206 /* LISTING_START(DhcpSetup): Setup DHCP Server with 3 entries for 192.168.7.0/8. */ 207 208 #define NUM_DHCP_ENTRY 3 209 210 static dhcp_entry_t entries[NUM_DHCP_ENTRY] = 211 { 212 /* mac ip address subnet mask lease time */ 213 { {0}, {192, 168, 7, 2}, {255, 255, 255, 0}, 24 * 60 * 60 }, 214 { {0}, {192, 168, 7, 3}, {255, 255, 255, 0}, 24 * 60 * 60 }, 215 { {0}, {192, 168, 7, 4}, {255, 255, 255, 0}, 24 * 60 * 60 } 216 }; 217 218 static dhcp_config_t dhcp_config = 219 { 220 {192, 168, 7, 1}, 67, /* server address, port */ 221 {0, 0, 0, 0}, /* dns server */ 222 NULL, /* dns suffix */ 223 NUM_DHCP_ENTRY, /* num entry */ 224 entries /* entries */ 225 }; 226 /* LISTING_END */ 227 228 229 /* @section Large File Download 230 * 231 * @text Listing LargeFile Shows how a configurable test file for performance tests is generated on the fly. 232 * The filename is the number of bytes to generate, e.g. /1048576.txt results in a 1MB file. 233 */ 234 235 /* LISTING_START(LargeFile): Provide large file. */ 236 237 int fs_open_custom(struct fs_file *file, const char *name){ 238 if (*name != '/') return 0; 239 uint32_t file_size = btstack_atoi(&name[1]); 240 if (file_size > 0) { 241 printf("Serving '%s' with %u bytes\n", name, file_size); 242 /* initialize fs_file correctly */ 243 memset(file, 0, sizeof(struct fs_file)); 244 file->len = file_size; 245 file->index = 0; 246 file->flags = FS_FILE_FLAGS_HEADER_PERSISTENT; 247 return 1; 248 } 249 return 0; 250 } 251 252 static uint16_t cgi_buffer_fill(char * cgi_buffer, uint16_t cgi_buffer_size, uint32_t start_pos){ 253 // fill buffer with dots 254 memset(cgi_buffer, (uint8_t) '.', cgi_buffer_size); 255 uint16_t cursor = 10; 256 uint16_t pos = 0; 257 const uint16_t line_length = 64; 258 259 while ((pos + line_length ) < cgi_buffer_size){ 260 // write position 261 sprintf((char *) &cgi_buffer[pos], "%08"PRIx32, start_pos + pos); 262 cgi_buffer[pos + 8] = '-'; 263 // cursor 264 cgi_buffer[pos+cursor] = '+'; 265 cursor++; 266 // new line 267 cgi_buffer[pos+line_length-1] = '\n'; 268 pos += line_length; 269 } 270 271 // handle last incomplete line 272 if (pos == 0){ 273 const char * last_line_text = "Thank you for evaluating BTstack!"; 274 uint16_t bytes_to_copy = btstack_min(strlen(last_line_text), cgi_buffer_size); 275 memcpy(cgi_buffer, last_line_text, bytes_to_copy); 276 pos = cgi_buffer_size; 277 } 278 279 return pos; 280 } 281 282 int fs_read_custom(struct fs_file *file, char *buffer, int count) 283 { 284 uint32_t remaining_data = file->len - file->index; 285 if (remaining_data == 0) { 286 // all bytes already read 287 return FS_READ_EOF; 288 } 289 290 uint32_t bytes_to_fill = remaining_data; 291 if (bytes_to_fill > count){ 292 bytes_to_fill = count; 293 } 294 295 uint32_t bytes_written = cgi_buffer_fill(buffer, bytes_to_fill, file->index); 296 file->index += bytes_written; 297 298 return bytes_written; 299 } 300 301 void 302 fs_close_custom(struct fs_file *file){ 303 } 304 305 /* LISTING_END */ 306 307 /* @section DHCP Server Setup 308 * 309 * @text Listing LwipSetup shows the setup of the lwIP network stack and starts the DHCP Server 310 */ 311 312 /* LISTING_START(LwipSetup): Report lwIP version, init lwIP, start DHCP Serverr */ 313 314 static void network_setup(void){ 315 printf("lwIP version: " LWIP_VERSION_STRING "\n"); 316 317 #if BYTE_ORDER == LITTLE_ENDIAN 318 // big endian detection not supported by build configuration 319 if (btstack_is_big_endian()){ 320 printf("lwIP configured for little endian, but running on big endian. Please set BYTE_ORDER to BIG_ENDIAN in lwiopts.h\n"); 321 while (1); 322 } 323 #endif 324 325 // init lwIP stack 326 #if NO_SYS 327 lwip_init(); 328 #else 329 tcpip_init(NULL, NULL); 330 #endif 331 332 // start DHCP Server 333 dhserv_init(&dhcp_config); 334 335 // start HTTP Server 336 httpd_init(); 337 } 338 /* LISTING_END */ 339 340 341 /* @section Main 342 * 343 * @text Setup the lwIP network and PAN NAP 344 */ 345 346 /* LISTING_START(Main): Setup lwIP network and PAN NAP */ 347 int btstack_main(int argc, const char * argv[]); 348 int btstack_main(int argc, const char * argv[]){ 349 350 (void)argc; 351 (void)argv; 352 353 // setup lwIP, HTTP, DHCP 354 network_setup(); 355 356 // setup Classic PAN NAP Service 357 pan_bnep_setup(); 358 359 // Turn on the device 360 hci_power_control(HCI_POWER_ON); 361 return 0; 362 } 363 /* LISTING_END */ 364 365 /* EXAMPLE_END */ 366