42 static uint8_t ppp_frame_wrapped[] = {0x7E, 0xFF, 0x7D, 0x23, 0xC0, 0x21, 0x7D, 0x21, 0x7D,
43 				      0x21, 0x7D, 0x20, 0x7D, 0x24, 0xD1, 0xB5, 0x7E};
45 static uint8_t ppp_frame_unwrapped[] = {0xC0, 0x21, 0x01, 0x01, 0x00, 0x04};
48 	0x7E, 0xFF, 0x7D, 0x23, 0x7D, 0x20, 0x21, 0x45, 0x7D, 0x20, 0x7D, 0x20, 0x29, 0x87, 0x6E,
49 	0x40, 0x7D, 0x20, 0xE8, 0x7D, 0x31, 0xC1, 0xE9, 0x7D, 0x23, 0xFB, 0x7D, 0x25, 0x20, 0x7D,
50 	0x2A, 0x2B, 0x36, 0x26, 0x25, 0x7D, 0x32, 0x8C, 0x3E, 0x7D, 0x20, 0x7D, 0x35, 0xBD, 0xF3,
51 	0x2D, 0x7D, 0x20, 0x7D, 0x2B, 0x7D, 0x20, 0x7D, 0x27, 0x7D, 0x20, 0x7D, 0x24, 0x7D, 0x20,
52 	0x7D, 0x24, 0x7D, 0x2A, 0x7D, 0x20, 0x7D, 0x2A, 0x7D, 0x20, 0xD4, 0x31, 0x7E};
55 	0x45, 0x00, 0x00, 0x29, 0x87, 0x6E, 0x40, 0x00, 0xE8, 0x11, 0xC1, 0xE9, 0x03, 0xFB,
56 	0x05, 0x20, 0x0A, 0x2B, 0x36, 0x26, 0x25, 0x12, 0x8C, 0x3E, 0x00, 0x15, 0xBD, 0xF3,
57 	0x2D, 0x00, 0x0B, 0x00, 0x07, 0x00, 0x04, 0x00, 0x04, 0x0A, 0x00, 0x0A, 0x00};
60 	0x00, 0x21, 0x45, 0x00, 0x00, 0x29, 0x87, 0x6E, 0x40, 0x00, 0xE8, 0x11, 0xC1, 0xE9, 0x03,
61 	0xFB, 0x05, 0x20, 0x0A, 0x2B, 0x36, 0x26, 0x25, 0x12, 0x8C, 0x3E, 0x00, 0x15, 0xBD, 0xF3,
62 	0x2D, 0x00, 0x0B, 0x00, 0x07, 0x00, 0x04, 0x00, 0x04, 0x0A, 0x00, 0x0A, 0x00};
64 static uint8_t corrupt_start_end_ppp_frame_wrapped[] = {0x2A, 0x46, 0x7E, 0x7E, 0xFF, 0x7D, 0x23,
65 							0xC0, 0x21, 0x7D, 0x21, 0x7D, 0x21, 0x7D,
66 							0x20, 0x7D, 0x24, 0xD1, 0xB5, 0x7E};
80 static uint8_t test_net_link_addr[] = {0x00, 0x00, 0x5E, 0x00, 0x53, 0x01};
154 	return (uint8_t)(prng_state & 0xFF);  in test_modem_ppp_prng_random()
161 	for (size_t i = 0; i < size; i++) {  in test_modem_ppp_fill_net_pkt()
162 		if (net_pkt_write_u8(pkt, test_modem_ppp_prng_random(false)) < 0) {  in test_modem_ppp_fill_net_pkt()
173 	size_t unwrapped_pos = 0;  in test_modem_ppp_unwrap()
177 		if (wrapped[wrapped_pos] == 0x7D) {  in test_modem_ppp_unwrap()
178 			unwrapped[unwrapped_pos] = wrapped[wrapped_pos + 1] ^ 0x20;  in test_modem_ppp_unwrap()
199 	for (size_t i = 0; i < size; i++) {  in test_modem_ppp_validate_fill()
215 	byte = 0x03;  in test_modem_ppp_generate_ppp_frame()
216 	fcs = crc16_ccitt(0xFFFF, &byte, 0x01);  in test_modem_ppp_generate_ppp_frame()
218 	frame[0] = 0x00;  in test_modem_ppp_generate_ppp_frame()
219 	frame[1] = 0x21;  in test_modem_ppp_generate_ppp_frame()
226 	fcs = crc16_ccitt(fcs, frame, size) ^ 0xFFFF;  in test_modem_ppp_generate_ppp_frame()
236 	wrapped[0] = 0x7E;  in test_modem_ppp_wrap_ppp_frame()
237 	wrapped[1] = 0xFF;  in test_modem_ppp_wrap_ppp_frame()
238 	wrapped[2] = 0x7D;  in test_modem_ppp_wrap_ppp_frame()
239 	wrapped[3] = 0x23;  in test_modem_ppp_wrap_ppp_frame()
241 	for (size_t i = 0; i < size; i++) {  in test_modem_ppp_wrap_ppp_frame()
242 		if ((frame[i] == 0x7E) || (frame[i] == 0x7D) || (frame[i] < 0x20)) {  in test_modem_ppp_wrap_ppp_frame()
243 			wrapped[wrapped_pos] = 0x7D;  in test_modem_ppp_wrap_ppp_frame()
244 			wrapped[wrapped_pos + 1] = frame[i] ^ 0x20;  in test_modem_ppp_wrap_ppp_frame()
253 	wrapped[wrapped_pos] = 0x7E;  in test_modem_ppp_wrap_ppp_frame()
267 	zassert_true(modem_ppp_init_internal(&ppp_net_dev) == 0, "Failed to run internal init");  in test_modem_ppp_setup()
279 	zassert_true(modem_pipe_open(mock_pipe, K_SECONDS(10)) == 0, "Failed to open mock pipe");  in test_modem_ppp_setup()
287 	for (size_t i = 0; i < received_packets_len; i++) {  in test_modem_ppp_before()
292 	received_packets_len = 0;  in test_modem_ppp_before()
315 	pkt = received_packets[0];  in ZTEST()
325 	zassert_true(memcmp(buffer, ppp_frame_unwrapped, pkt_len) == 0,  in ZTEST()
345 	pkt = received_packets[0];  in ZTEST()
352 	zassert_true(memcmp(buffer, ppp_frame_unwrapped, pkt_len) == 0,  in ZTEST()
362 	pkt = net_pkt_alloc_with_buffer(&test_iface, 256, AF_UNSPEC, 0, K_NO_WAIT);  in ZTEST()
369 	zassert_true(ret == 0, "Failed to write data to allocated network packet");  in ZTEST()
373 	zassert_true(test_net_send(pkt) == 0, "Failed to send PPP pkt");  in ZTEST()
381 	zassert_true(memcmp(buffer, ppp_frame_wrapped, ret) == 0,  in ZTEST()
398 	pkt = received_packets[0];  in ZTEST()
408 	zassert_true(memcmp(buffer, ip_frame_unwrapped_with_protocol, pkt_len) == 0,  in ZTEST()
418 	pkt = net_pkt_alloc_with_buffer(&test_iface, 256, AF_UNSPEC, 0, K_NO_WAIT);  in ZTEST()
424 	zassert_true(ret == 0, "Failed to write data to allocated network packet");  in ZTEST()
436 	zassert_true(memcmp(buffer, ip_frame_wrapped, ret) == 0,  in ZTEST()
446 	for (uint8_t i = 0; i < TEST_MODEM_PPP_IP_FRAME_SEND_MULT_N; i++) {  in ZTEST()
447 		pkts[i] = net_pkt_alloc_with_buffer(&test_iface, 256, AF_UNSPEC, 0, K_NO_WAIT);  in ZTEST()
451 		zassert_true(ret == 0, "Failed to write data to allocated network packet");  in ZTEST()
456 	for (uint8_t i = 0; i < TEST_MODEM_PPP_IP_FRAME_SEND_MULT_N; i++) {  in ZTEST()
474 					AF_UNSPEC, 0, K_NO_WAIT);  in ZTEST()
490 	zassert_true(unwrapped_buffer[0] == 0x00, "Incorrect protocol");  in ZTEST()
491 	zassert_true(unwrapped_buffer[1] == 0x21, "Incorrect protocol");  in ZTEST()
514 	pkt = received_packets[0];  in ZTEST()