diff --git a/src/checksum.c b/src/checksum.c index 8caf563..a8b332e 100644 --- a/src/checksum.c +++ b/src/checksum.c @@ -112,3 +112,48 @@ checksum_crc_ccitt_uint16 (const unsigned char data[], unsigned int size) return crc; } + +unsigned int +checksum_crc32 (const unsigned char data[], unsigned int size) +{ + static const unsigned int crc_table[] = { + 0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, 0x706af48f, 0xe963a535, 0x9e6495a3, + 0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988, 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91, + 0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de, 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7, + 0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9, 0xfa0f3d63, 0x8d080df5, + 0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172, 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b, + 0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940, 0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59, + 0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423, 0xcfba9599, 0xb8bda50f, + 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924, 0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, + 0x76dc4190, 0x01db7106, 0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433, + 0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01, + 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e, 0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457, + 0x65b0d9c6, 0x12b7e950, 0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65, + 0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, 0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb, + 0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0, 0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9, + 0x5005713c, 0x270241aa, 0xbe0b1010, 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f, + 0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17, 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad, + 0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a, 0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683, + 0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8, 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1, + 0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb, 0x196c3671, 0x6e6b06e7, + 0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc, 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5, + 0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252, 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b, + 0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55, 0x316e8eef, 0x4669be79, + 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236, 0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, + 0xc5ba3bbe, 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d, + 0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a, 0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713, + 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38, 0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, + 0x86d3d2d4, 0xf1d4e242, 0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777, + 0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, 0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45, + 0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2, 0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db, + 0xaed16a4a, 0xd9d65adc, 0x40df0b66, 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9, + 0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605, 0xcdd70693, 0x54de5729, 0x23d967bf, + 0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94, 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d, + }; + + unsigned int crc = 0xffffffff; + for (unsigned int i = 0; i < size; ++i) + crc = crc_table[(crc ^ data[i]) & 0xff] ^ (crc >> 8); + + return crc ^ 0xffffffff; +} diff --git a/src/checksum.h b/src/checksum.h index 4e54d45..a6ead09 100644 --- a/src/checksum.h +++ b/src/checksum.h @@ -41,6 +41,9 @@ checksum_xor_uint8 (const unsigned char data[], unsigned int size, unsigned char unsigned short checksum_crc_ccitt_uint16 (const unsigned char data[], unsigned int size); +unsigned int +checksum_crc32 (const unsigned char data[], unsigned int size); + #ifdef __cplusplus } #endif /* __cplusplus */ diff --git a/src/descriptor.c b/src/descriptor.c index 948a9f3..4ba943e 100644 --- a/src/descriptor.c +++ b/src/descriptor.c @@ -98,8 +98,8 @@ static const dc_descriptor_t g_descriptors[] = { {"Suunto", "Zoop Novo", DC_FAMILY_SUUNTO_D9, 0x1E, DC_TRANSPORT_SERIAL, NULL}, {"Suunto", "D4f", DC_FAMILY_SUUNTO_D9, 0x20, DC_TRANSPORT_SERIAL, NULL}, /* Suunto EON Steel */ - {"Suunto", "EON Steel", DC_FAMILY_SUUNTO_EONSTEEL, 0, DC_TRANSPORT_USBHID, dc_filter_suunto}, - {"Suunto", "EON Core", DC_FAMILY_SUUNTO_EONSTEEL, 1, DC_TRANSPORT_USBHID, dc_filter_suunto}, + {"Suunto", "EON Steel", DC_FAMILY_SUUNTO_EONSTEEL, 0, DC_TRANSPORT_USBHID | DC_TRANSPORT_BLE, dc_filter_suunto}, + {"Suunto", "EON Core", DC_FAMILY_SUUNTO_EONSTEEL, 1, DC_TRANSPORT_USBHID | DC_TRANSPORT_BLE, dc_filter_suunto}, /* Uwatec Aladin */ {"Uwatec", "Aladin Air Twin", DC_FAMILY_UWATEC_ALADIN, 0x1C, DC_TRANSPORT_SERIAL, NULL}, {"Uwatec", "Aladin Sport Plus", DC_FAMILY_UWATEC_ALADIN, 0x3E, DC_TRANSPORT_SERIAL, NULL}, diff --git a/src/suunto_eonsteel.c b/src/suunto_eonsteel.c index 6c430b4..336877b 100644 --- a/src/suunto_eonsteel.c +++ b/src/suunto_eonsteel.c @@ -28,6 +28,7 @@ #include "device-private.h" #include "array.h" #include "platform.h" +#include "checksum.h" #define EONSTEEL 0 #define EONCORE 1 @@ -76,6 +77,13 @@ struct directory_entry { #define PACKET_SIZE 64 #define HEADER_SIZE 12 +#define MAXDATA_SIZE 2048 +#define CRC_SIZE 4 + +// HDLC special characters +#define END 0x7E +#define ESC 0x7D +#define ESC_BIT 0x20 static dc_status_t suunto_eonsteel_device_set_fingerprint (dc_device_t *abstract, const unsigned char data[], unsigned int size); static dc_status_t suunto_eonsteel_device_foreach(dc_device_t *abstract, dc_dive_callback_t callback, void *userdata); @@ -133,6 +141,142 @@ static void put_le32(unsigned int val, unsigned char *p) p[3] = val >> 24; } +static dc_status_t +suunto_eonsteel_hdlc_write (suunto_eonsteel_device_t *device, const unsigned char data[], size_t size, size_t *actual) +{ + dc_status_t status = DC_STATUS_SUCCESS; + unsigned char buffer[20]; + size_t nbytes = 0; + + // Start of the packet. + buffer[nbytes++] = END; + + for (size_t i = 0; i < size; ++i) { + unsigned char c = data[i]; + + if (c == END || c == ESC) { + // Append the escape character. + buffer[nbytes++] = ESC; + + // Flush the buffer if necessary. + if (nbytes >= sizeof(buffer)) { + status = dc_iostream_write(device->iostream, buffer, nbytes, NULL); + if (status != DC_STATUS_SUCCESS) { + ERROR(device->base.context, "Failed to send the packet."); + return status; + } + + nbytes = 0; + } + + // Escape the character. + c ^= ESC_BIT; + } + + // Append the character. + buffer[nbytes++] = c; + + // Flush the buffer if necessary. + if (nbytes >= sizeof(buffer)) { + status = dc_iostream_write(device->iostream, buffer, nbytes, NULL); + if (status != DC_STATUS_SUCCESS) { + ERROR(device->base.context, "Failed to send the packet."); + return status; + } + + nbytes = 0; + } + } + + // End of the packet. + buffer[nbytes++] = END; + + // Flush the buffer. + status = dc_iostream_write(device->iostream, buffer, nbytes, NULL); + if (status != DC_STATUS_SUCCESS) { + ERROR(device->base.context, "Failed to send the packet."); + return status; + } + + if (actual) + *actual = size; + + return status; + +} + +static dc_status_t +suunto_eonsteel_hdlc_read (suunto_eonsteel_device_t *device, unsigned char data[], size_t size, size_t *actual) +{ + dc_status_t status = DC_STATUS_SUCCESS; + unsigned char buffer[20]; + unsigned int initialized = 0; + unsigned int escaped = 0; + size_t nbytes = 0; + + while (1) { + // Read a single data packet. + size_t transferred = 0; + status = dc_iostream_read(device->iostream, buffer, sizeof(buffer), &transferred); + if (status != DC_STATUS_SUCCESS) { + ERROR(device->base.context, "Failed to receive the packet."); + return status; + } + + for (size_t i = 0; i < transferred; ++i) { + unsigned char c = buffer[i]; + + if (c == END) { + if (escaped) { + ERROR (device->base.context, "HDLC frame escaped the special character %02x.", c); + return DC_STATUS_PROTOCOL; + } + + if (initialized) { + goto done; + } + + initialized = 1; + continue; + } + + if (!initialized) { + continue; + } + + if (c == ESC) { + if (escaped) { + ERROR (device->base.context, "HDLC frame escaped the special character %02x.", c); + return DC_STATUS_PROTOCOL; + } + escaped = 1; + continue; + } + + if (escaped) { + c ^= ESC_BIT; + escaped = 0; + } + + if (nbytes < size) + data[nbytes] = c; + nbytes++; + + } + } + +done: + if (nbytes > size) { + ERROR(device->base.context, "Insufficient buffer space available."); + return DC_STATUS_PROTOCOL; + } + + if (actual) + *actual = nbytes; + + return status; +} + /* * Get a single 64-byte packet from the dive computer. This handles packet * logging and any obvious packet-level errors, and returns the payload of @@ -144,7 +288,7 @@ static void put_le32(unsigned int val, unsigned char *p) * The maximum payload is 62 bytes. */ static dc_status_t -suunto_eonsteel_receive(suunto_eonsteel_device_t *device, unsigned char data[], unsigned int size, unsigned int *actual) +suunto_eonsteel_receive_usb(suunto_eonsteel_device_t *device, unsigned char data[], unsigned int size, unsigned int *actual) { dc_status_t rc = DC_STATUS_SUCCESS; unsigned char buf[PACKET_SIZE]; @@ -187,6 +331,48 @@ suunto_eonsteel_receive(suunto_eonsteel_device_t *device, unsigned char data[], return DC_STATUS_SUCCESS; } +static dc_status_t +suunto_eonsteel_receive_ble(suunto_eonsteel_device_t *device, unsigned char data[], unsigned int size, unsigned int *actual) +{ + dc_status_t rc = DC_STATUS_SUCCESS; + unsigned char buffer[HEADER_SIZE + MAXDATA_SIZE + CRC_SIZE]; + size_t transferred = 0; + + rc = suunto_eonsteel_hdlc_read(device, buffer, sizeof(buffer), &transferred); + if (rc != DC_STATUS_SUCCESS) { + ERROR(device->base.context, "Failed to receive the packet."); + return rc; + } + + if (transferred < CRC_SIZE) { + ERROR(device->base.context, "Invalid packet length (" DC_PRINTF_SIZE ").", transferred); + return DC_STATUS_PROTOCOL; + } + + unsigned int nbytes = transferred - CRC_SIZE; + + unsigned int crc = array_uint32_le(buffer + nbytes); + unsigned int ccrc = checksum_crc32(buffer, nbytes); + if (crc != ccrc) { + ERROR(device->base.context, "Invalid checksum (expected %08x, received %08x).", ccrc, crc); + return DC_STATUS_PROTOCOL; + } + + if (nbytes > size) { + ERROR(device->base.context, "Insufficient buffer space available."); + return DC_STATUS_PROTOCOL; + } + + memcpy(data, buffer, nbytes); + + HEXDUMP (device->base.context, DC_LOGLEVEL_DEBUG, "rcv", buffer, nbytes); + + if (actual) + *actual = nbytes; + + return DC_STATUS_SUCCESS; +} + static dc_status_t suunto_eonsteel_send(suunto_eonsteel_device_t *device, unsigned short cmd, @@ -194,11 +380,10 @@ suunto_eonsteel_send(suunto_eonsteel_device_t *device, unsigned int size) { dc_status_t rc = DC_STATUS_SUCCESS; - unsigned char buf[PACKET_SIZE]; - size_t transferred = 0; + unsigned char buf[PACKET_SIZE + CRC_SIZE]; // Two-byte packet header, followed by 12 bytes of extended header - if (size + 2 + HEADER_SIZE > sizeof(buf)) { + if (size + 2 + HEADER_SIZE + CRC_SIZE > sizeof(buf)) { ERROR(device->base.context, "Insufficient buffer space available."); return DC_STATUS_PROTOCOL; } @@ -225,7 +410,15 @@ suunto_eonsteel_send(suunto_eonsteel_device_t *device, memcpy(buf + 14, data, size); } - rc = dc_iostream_write(device->iostream, buf, sizeof(buf), &transferred); + // 4 byte LE checksum + unsigned int crc = checksum_crc32(buf + 2, size + HEADER_SIZE); + put_le32(crc, buf + 14 + size); + + if (dc_iostream_get_transport(device->iostream) == DC_TRANSPORT_BLE) { + rc = suunto_eonsteel_hdlc_write(device, buf + 2, size + HEADER_SIZE + CRC_SIZE, NULL); + } else { + rc = dc_iostream_write(device->iostream, buf, sizeof(buf) - CRC_SIZE, NULL); + } if (rc != DC_STATUS_SUCCESS) { ERROR(device->base.context, "Failed to send the command."); return rc; @@ -257,7 +450,7 @@ suunto_eonsteel_transfer(suunto_eonsteel_device_t *device, unsigned int *actual) { dc_status_t rc = DC_STATUS_SUCCESS; - unsigned char header[PACKET_SIZE]; + unsigned char header[HEADER_SIZE + MAXDATA_SIZE]; unsigned int len = 0; // Send the command. @@ -265,8 +458,13 @@ suunto_eonsteel_transfer(suunto_eonsteel_device_t *device, if (rc != DC_STATUS_SUCCESS) return rc; - // Receive the header and the first part of the data. - rc = suunto_eonsteel_receive(device, header, sizeof(header), &len); + if (dc_iostream_get_transport(device->iostream) == DC_TRANSPORT_BLE) { + // Receive the entire data packet. + rc = suunto_eonsteel_receive_ble(device, header, sizeof(header), &len); + } else { + // Receive the header and the first part of the data. + rc = suunto_eonsteel_receive_usb(device, header, sizeof(header), &len); + } if (rc != DC_STATUS_SUCCESS) return rc; @@ -319,15 +517,17 @@ suunto_eonsteel_transfer(suunto_eonsteel_device_t *device, memcpy(answer, header + HEADER_SIZE, nbytes); // Receive the remainder of the data. - while (nbytes < length) { - rc = suunto_eonsteel_receive(device, answer + nbytes, length - nbytes, &len); - if (rc != DC_STATUS_SUCCESS) - return rc; + if (dc_iostream_get_transport(device->iostream) != DC_TRANSPORT_BLE) { + while (nbytes < length) { + rc = suunto_eonsteel_receive_usb(device, answer + nbytes, length - nbytes, &len); + if (rc != DC_STATUS_SUCCESS) + return rc; - nbytes += len; + nbytes += len; - if (len < PACKET_SIZE - 2) - break; + if (len < PACKET_SIZE - 2) + break; + } } // Verify the total payload length.