2  * Copyright (c) 2022-2024 Libre Solar Technologies GmbH
3  * Copyright (c) 2022-2024 tado GmbH
6  * LoRaMac-node firmware repository https://github.com/Lora-net/LoRaMac-node
9  * SPDX-License-Identifier: Apache-2.0
32  * This implementation only supports TS004-1.0.0.
48 	FRAG_TRANSPORT_CMD_PKG_VERSION = 0x00,
49 	FRAG_TRANSPORT_CMD_FRAG_STATUS = 0x01,
50 	FRAG_TRANSPORT_CMD_FRAG_SESSION_SETUP = 0x02,
51 	FRAG_TRANSPORT_CMD_FRAG_SESSION_DELETE = 0x03,
52 	FRAG_TRANSPORT_CMD_DATA_FRAGMENT = 0x08,
67 	/** Number of fragments of the data block for this session, max. 2^14-1 */
76 			/** Random delay for some responses between 0 and 2^(BlockAckDelay + 4) */
78 			/** Used fragmentation algorithm (0 for forward error correction) */
84 	/** Application-specific descriptor for the data block, e.g. firmware version */
108 	uint8_t tx_pos = 0;  in frag_transport_package_callback()
109 	uint8_t rx_pos = 0;  in frag_transport_package_callback()
110 	int ans_delay = 0;  in frag_transport_package_callback()
118 		if (sizeof(tx_buf) - tx_pos < FRAG_TRANSPORT_MAX_ANS_LEN) {  in frag_transport_package_callback()
130 			uint8_t frag_status = rx_buf[rx_pos++] & 0x07;  in frag_transport_package_callback()
131 			uint8_t participants = frag_status & 0x01;  in frag_transport_package_callback()
137 			uint8_t missing_frag = CLAMP(ctx.nb_frag - ctx.nb_frag_received, 0, 255);  in frag_transport_package_callback()
139 			uint8_t memory_error = 0;  in frag_transport_package_callback()
145 			if (participants == 1 || missing_frag > 0) {  in frag_transport_package_callback()
147 				tx_buf[tx_pos++] = ctx.nb_frag_received & 0xFF;  in frag_transport_package_callback()
149 					(index << 6) | ((ctx.nb_frag_received >> 8) & 0x3F);  in frag_transport_package_callback()
151 				tx_buf[tx_pos++] = memory_error & 0x01;  in frag_transport_package_callback()
163 			uint8_t frag_session = rx_buf[rx_pos++] & 0x3F;  in frag_transport_package_callback()
169 				ctx.nb_frag_received = 0;  in frag_transport_package_callback()
182 					"padding: %u, control: 0x%x, descriptor: 0x%.8x",  in frag_transport_package_callback()
193 			if (ctx.frag_algo > 0) {  in frag_transport_package_callback()
195 				status |= BIT(0);  in frag_transport_package_callback()
212 			if ((status & 0x1F) == 0) {  in frag_transport_package_callback()
216 				 * from writing byte-wise 0xFF to the entire flash. Instead, erase  in frag_transport_package_callback()
238 			uint8_t index = rx_buf[rx_pos++] & 0x03;  in frag_transport_package_callback()
239 			uint8_t status = 0x00;  in frag_transport_package_callback()
260 			uint16_t frag_counter = frag_index_n & 0x3FFF;  in frag_transport_package_callback()
261 			uint8_t index = (frag_index_n >> 14) & 0x03;  in frag_transport_package_callback()
284 				frag_counter, ctx.nb_frag, frag_counter - ctx.nb_frag_received,  in frag_transport_package_callback()
287 			if (decoder_process_status >= 0) {  in frag_transport_package_callback()
288 				/* Positive status corresponds to number of lost (but recovered)  in frag_transport_package_callback()
289 				 * fragments. Value >= 0 means the transport is done.  in frag_transport_package_callback()
311 	if (tx_pos > 0) {  in frag_transport_package_callback()
328 	return 0;  in lorawan_frag_transport_run()