4  * SPDX-License-Identifier: Apache-2.0
29 #include <zephyr/net/dummy.h>
99 	if (!pkt->buffer) {  in slip_send()
101 		return -ENODATA;  in slip_send()
106 	for (buf = pkt->buffer; buf; buf = buf->frags) {  in slip_send()
107 		ptr = buf->data;  in slip_send()
108 		for (i = 0U; i < buf->len; ++i) {  in slip_send()
114 			LOG_DBG("sent data %d bytes", buf->len);  in slip_send()
116 			if (buf->len) {  in slip_send()
117 				LOG_HEXDUMP_DBG(buf->data,  in slip_send()
118 						buf->len, "<slip ");  in slip_send()
130 	if (slip->last && slip->last->len) {  in slip_poll_handler()
131 		return slip->rx;  in slip_poll_handler()
143 	iface = net_eth_get_vlan_iface(context->iface, vlan_tag);  in get_iface()
145 		return context->iface;  in get_iface()
152 	return context->iface;  in get_iface()
162 	if (!pkt || !pkt->buffer) {  in process_msg()
170 		if (ntohs(hdr->type) == NET_ETH_PTYPE_VLAN) {  in process_msg()
174 			net_pkt_set_vlan_tci(pkt, ntohs(hdr_vlan->vlan.tci));  in process_msg()
184 	slip->rx = NULL;  in process_msg()
185 	slip->last = NULL;  in process_msg()
191 	switch (slip->state) {  in slip_input_byte()
194 			slip->state = STATE_OK;  in slip_input_byte()
204 			slip->state = STATE_GARBAGE;  in slip_input_byte()
205 			SLIP_STATS(slip->garbage++);  in slip_input_byte()
209 		slip->state = STATE_OK;  in slip_input_byte()
214 			slip->state = STATE_ESC;  in slip_input_byte()
219 			slip->state = STATE_OK;  in slip_input_byte()
220 			slip->first = false;  in slip_input_byte()
222 			if (slip->rx) {  in slip_input_byte()
229 		if (slip->first && !slip->rx) {  in slip_input_byte()
234 		if (!slip->first) {  in slip_input_byte()
235 			slip->first = true;  in slip_input_byte()
237 			slip->rx = net_pkt_rx_alloc_on_iface(slip->iface,  in slip_input_byte()
239 			if (!slip->rx) {  in slip_input_byte()
244 			slip->last = net_pkt_get_frag(slip->rx, SLIP_FRAG_LEN,  in slip_input_byte()
246 			if (!slip->last) {  in slip_input_byte()
249 				net_pkt_unref(slip->rx);  in slip_input_byte()
250 				slip->rx = NULL;  in slip_input_byte()
254 			net_pkt_append_buffer(slip->rx, slip->last);  in slip_input_byte()
255 			slip->ptr = net_pkt_ip_data(slip->rx);  in slip_input_byte()
261 	/* It is possible that slip->last is not set during the startup  in slip_input_byte()
265 	if (!slip->last) {  in slip_input_byte()
269 	if (!net_buf_tailroom(slip->last)) {  in slip_input_byte()
276 			net_pkt_unref(slip->rx);  in slip_input_byte()
277 			slip->rx = NULL;  in slip_input_byte()
278 			slip->last = NULL;  in slip_input_byte()
283 		net_buf_frag_insert(slip->last, buf);  in slip_input_byte()
284 		slip->last = buf;  in slip_input_byte()
285 		slip->ptr = slip->last->data;  in slip_input_byte()
291 	if (slip->ptr < slip->last->data) {  in slip_input_byte()
292 		*slip->ptr = c;  in slip_input_byte()
294 		slip->ptr = net_buf_add_u8(slip->last, c);  in slip_input_byte()
297 	slip->ptr++;  in slip_input_byte()
308 	if (!slip->init_done) {  in recv_cb()
317 				struct net_buf *rx_buf = slip->rx->buffer;  in recv_cb()
318 				int bytes = net_buf_frags_len(rx_buf);  in recv_cb()  local
319 				int count = 0;  in recv_cb()  local
321 				while (bytes && rx_buf) {  in recv_cb()
325 						 ">slip %2d", count);  in recv_cb()
327 					LOG_HEXDUMP_DBG(rx_buf->data, rx_buf->len,  in recv_cb()
330 					rx_buf = rx_buf->frags;  in recv_cb()
331 					count++;  in recv_cb()
334 				LOG_DBG("[%p] received data %d bytes", slip,  in recv_cb()
335 					bytes);  in recv_cb()
350 	struct slip_context *slip = dev->data;  in slip_init()
354 	slip->state = STATE_OK;  in slip_init()
355 	slip->rx = NULL;  in slip_init()
356 	slip->first = false;  in slip_init()
362 	uart_pipe_register(slip->buf, sizeof(slip->buf), recv_cb);  in slip_init()
369 	slip->ll_addr.addr = slip->mac_addr;  in slip_get_mac()
370 	slip->ll_addr.len = sizeof(slip->mac_addr);  in slip_get_mac()
372 	return &slip->ll_addr;  in slip_get_mac()
377 	struct slip_context *slip = net_if_get_device(iface)->data;  in slip_iface_init()
388 	if (slip->init_done) {  in slip_iface_init()
394 	slip->init_done = true;  in slip_iface_init()
395 	slip->iface = iface;  in slip_iface_init()
398 		if (net_bytes_from_str(slip->mac_addr, sizeof(slip->mac_addr),  in slip_iface_init()
404 		/* 00-00-5E-00-53-xx Documentation RFC 7042 */  in slip_iface_init()
405 		slip->mac_addr[0] = 0x00;  in slip_iface_init()
406 		slip->mac_addr[1] = 0x00;  in slip_iface_init()
407 		slip->mac_addr[2] = 0x5E;  in slip_iface_init()
408 		slip->mac_addr[3] = 0x00;  in slip_iface_init()
409 		slip->mac_addr[4] = 0x53;  in slip_iface_init()
410 		slip->mac_addr[5] = sys_rand8_get();  in slip_iface_init()
412 	net_if_set_link_addr(iface, ll_addr->addr, ll_addr->len,  in slip_iface_init()