[thirdparty/u-boot.git] / net / wget.c

// SPDX-License-Identifier: GPL-2.0
/*
 * WGET/HTTP support driver based on U-BOOT's nfs.c
 * Copyright Duncan Hare <dh@synoia.com> 2017
 */

#include <command.h>
#include <common.h>
#include <display_options.h>
#include <env.h>
#include <image.h>
#include <mapmem.h>
#include <net.h>
#include <net/tcp.h>
#include <net/wget.h>

static const char bootfile1[] = "GET ";
static const char bootfile3[] = " HTTP/1.0\r\n\r\n";
static const char http_eom[] = "\r\n\r\n";
static const char http_ok[] = "200";
static const char content_len[] = "Content-Length";
static const char linefeed[] = "\r\n";
static struct in_addr web_server_ip;
static int our_port;
static int wget_timeout_count;

struct pkt_qd {
	uchar *pkt;
	unsigned int tcp_seq_num;
	unsigned int len;
};

/*
 * This is a control structure for out of order packets received.
 * The actual packet bufers are in the kernel space, and are
 * expected to be overwritten by the downloaded image.
 */
static struct pkt_qd pkt_q[PKTBUFSRX / 4];
static int pkt_q_idx;
static unsigned long content_length;
static unsigned int packets;

static unsigned int initial_data_seq_num;

static enum  wget_state current_wget_state;

static char *image_url;
static unsigned int wget_timeout = WGET_TIMEOUT;

static enum net_loop_state wget_loop_state;

/* Timeout retry parameters */
static u8 retry_action;			/* actions for TCP retry */
static unsigned int retry_tcp_ack_num;	/* TCP retry acknowledge number*/
static unsigned int retry_tcp_seq_num;	/* TCP retry sequence number */
static int retry_len;			/* TCP retry length */

/**
 * store_block() - store block in memory
 * @src: source of data
 * @offset: offset
 * @len: length
 */
static inline int store_block(uchar *src, unsigned int offset, unsigned int len)
{
	ulong newsize = offset + len;
	uchar *ptr;

	ptr = map_sysmem(image_load_addr + offset, len);
	memcpy(ptr, src, len);
	unmap_sysmem(ptr);

	if (net_boot_file_size < (offset + len))
		net_boot_file_size = newsize;

	return 0;
}

/**
 * wget_send_stored() - wget response dispatcher
 *
 * WARNING, This, and only this, is the place in wget.c where
 * SEQUENCE NUMBERS are swapped between incoming (RX)
 * and outgoing (TX).
 * Procedure wget_handler() is correct for RX traffic.
 */
static void wget_send_stored(void)
{
	u8 action = retry_action;
	int len = retry_len;
	unsigned int tcp_ack_num = retry_tcp_seq_num + (len == 0 ? 1 : len);
	unsigned int tcp_seq_num = retry_tcp_ack_num;
	uchar *ptr, *offset;

	switch (current_wget_state) {
	case WGET_CLOSED:
		debug_cond(DEBUG_WGET, "wget: send SYN\n");
		current_wget_state = WGET_CONNECTING;
		net_send_tcp_packet(0, SERVER_PORT, our_port, action,
				    tcp_seq_num, tcp_ack_num);
		packets = 0;
		break;
	case WGET_CONNECTING:
		pkt_q_idx = 0;
		net_send_tcp_packet(0, SERVER_PORT, our_port, action,
				    tcp_seq_num, tcp_ack_num);

		ptr = net_tx_packet + net_eth_hdr_size() +
			IP_TCP_HDR_SIZE + TCP_TSOPT_SIZE + 2;
		offset = ptr;

		memcpy(offset, &bootfile1, strlen(bootfile1));
		offset += strlen(bootfile1);

		memcpy(offset, image_url, strlen(image_url));
		offset += strlen(image_url);

		memcpy(offset, &bootfile3, strlen(bootfile3));
		offset += strlen(bootfile3);
		net_send_tcp_packet((offset - ptr), SERVER_PORT, our_port,
				    TCP_PUSH, tcp_seq_num, tcp_ack_num);
		current_wget_state = WGET_CONNECTED;
		break;
	case WGET_CONNECTED:
	case WGET_TRANSFERRING:
	case WGET_TRANSFERRED:
		net_send_tcp_packet(0, SERVER_PORT, our_port, action,
				    tcp_seq_num, tcp_ack_num);
		break;
	}
}

static void wget_send(u8 action, unsigned int tcp_seq_num,
		      unsigned int tcp_ack_num, int len)
{
	retry_action = action;
	retry_tcp_ack_num = tcp_ack_num;
	retry_tcp_seq_num = tcp_seq_num;
	retry_len = len;

	wget_send_stored();
}

void wget_fail(char *error_message, unsigned int tcp_seq_num,
	       unsigned int tcp_ack_num, u8 action)
{
	printf("wget: Transfer Fail - %s\n", error_message);
	net_set_timeout_handler(0, NULL);
	wget_send(action, tcp_seq_num, tcp_ack_num, 0);
}

void wget_success(u8 action, unsigned int tcp_seq_num,
		  unsigned int tcp_ack_num, int len, int packets)
{
	printf("Packets received %d, Transfer Successful\n", packets);
	wget_send(action, tcp_seq_num, tcp_ack_num, len);
}

/*
 * Interfaces of U-BOOT
 */
static void wget_timeout_handler(void)
{
	if (++wget_timeout_count > WGET_RETRY_COUNT) {
		puts("\nRetry count exceeded; starting again\n");
		wget_send(TCP_RST, 0, 0, 0);
		net_start_again();
	} else {
		puts("T ");
		net_set_timeout_handler(wget_timeout +
					WGET_TIMEOUT * wget_timeout_count,
					wget_timeout_handler);
		wget_send_stored();
	}
}

#define PKT_QUEUE_OFFSET 0x20000
#define PKT_QUEUE_PACKET_SIZE 0x800

static void wget_connected(uchar *pkt, unsigned int tcp_seq_num,
			   u8 action, unsigned int tcp_ack_num, unsigned int len)
{
	uchar *pkt_in_q;
	char *pos;
	int hlen, i;
	uchar *ptr1;

	pkt[len] = '\0';
	pos = strstr((char *)pkt, http_eom);

	if (!pos) {
		debug_cond(DEBUG_WGET,
			   "wget: Connected, data before Header %p\n", pkt);
		pkt_in_q = (void *)image_load_addr + PKT_QUEUE_OFFSET +
			(pkt_q_idx * PKT_QUEUE_PACKET_SIZE);

		ptr1 = map_sysmem((phys_addr_t)pkt_in_q, len);
		memcpy(ptr1, pkt, len);
		unmap_sysmem(ptr1);

		pkt_q[pkt_q_idx].pkt = pkt_in_q;
		pkt_q[pkt_q_idx].tcp_seq_num = tcp_seq_num;
		pkt_q[pkt_q_idx].len = len;
		pkt_q_idx++;
	} else {
		debug_cond(DEBUG_WGET, "wget: Connected HTTP Header %p\n", pkt);
		/* sizeof(http_eom) - 1 is the string length of (http_eom) */
		hlen = pos - (char *)pkt + sizeof(http_eom) - 1;
		pos = strstr((char *)pkt, linefeed);
		if (pos > 0)
			i = pos - (char *)pkt;
		else
			i = hlen;
		printf("%.*s", i,  pkt);

		current_wget_state = WGET_TRANSFERRING;

		if (strstr((char *)pkt, http_ok) == 0) {
			debug_cond(DEBUG_WGET,
				   "wget: Connected Bad Xfer\n");
			initial_data_seq_num = tcp_seq_num + hlen;
			wget_loop_state = NETLOOP_FAIL;
			wget_send(action, tcp_seq_num, tcp_ack_num, len);
		} else {
			debug_cond(DEBUG_WGET,
				   "wget: Connctd pkt %p  hlen %x\n",
				   pkt, hlen);
			initial_data_seq_num = tcp_seq_num + hlen;

			pos = strstr((char *)pkt, content_len);
			if (!pos) {
				content_length = -1;
			} else {
				pos += sizeof(content_len) + 2;
				strict_strtoul(pos, 10, &content_length);
				debug_cond(DEBUG_WGET,
					   "wget: Connected Len %lu\n",
					   content_length);
			}

			net_boot_file_size = 0;

			if (len > hlen)
				store_block(pkt + hlen, 0, len - hlen);

			debug_cond(DEBUG_WGET,
				   "wget: Connected Pkt %p hlen %x\n",
				   pkt, hlen);

			for (i = 0; i < pkt_q_idx; i++) {
				ptr1 = map_sysmem(
					(phys_addr_t)(pkt_q[i].pkt),
					pkt_q[i].len);
				store_block(ptr1,
					    pkt_q[i].tcp_seq_num -
					    initial_data_seq_num,
					    pkt_q[i].len);
				unmap_sysmem(ptr1);
				debug_cond(DEBUG_WGET,
					   "wget: Connctd pkt Q %p len %x\n",
					   pkt_q[i].pkt, pkt_q[i].len);
			}
		}
	}
	wget_send(action, tcp_seq_num, tcp_ack_num, len);
}

/**
 * wget_handler() - TCP handler of wget
 * @pkt: pointer to the application packet
 * @dport: destination TCP port
 * @sip: source IP address
 * @sport: source TCP port
 * @tcp_seq_num: TCP sequential number
 * @tcp_ack_num: TCP acknowledgment number
 * @action: TCP action (SYN, ACK, FIN, etc)
 * @len: packet length
 *
 * In the "application push" invocation, the TCP header with all
 * its information is pointed to by the packet pointer.
 */
static void wget_handler(uchar *pkt, u16 dport,
			 struct in_addr sip, u16 sport,
			 u32 tcp_seq_num, u32 tcp_ack_num,
			 u8 action, unsigned int len)
{
	enum tcp_state wget_tcp_state = tcp_get_tcp_state();

	net_set_timeout_handler(wget_timeout, wget_timeout_handler);
	packets++;

	switch (current_wget_state) {
	case WGET_CLOSED:
		debug_cond(DEBUG_WGET, "wget: Handler: Error!, State wrong\n");
		break;
	case WGET_CONNECTING:
		debug_cond(DEBUG_WGET,
			   "wget: Connecting In len=%x, Seq=%u, Ack=%u\n",
			   len, tcp_seq_num, tcp_ack_num);
		if (!len) {
			if (wget_tcp_state == TCP_ESTABLISHED) {
				debug_cond(DEBUG_WGET,
					   "wget: Cting, send, len=%x\n", len);
				wget_send(action, tcp_seq_num, tcp_ack_num,
					  len);
			} else {
				printf("%.*s", len,  pkt);
				wget_fail("wget: Handler Connected Fail\n",
					  tcp_seq_num, tcp_ack_num, action);
			}
		}
		break;
	case WGET_CONNECTED:
		debug_cond(DEBUG_WGET, "wget: Connected seq=%u, len=%x\n",
			   tcp_seq_num, len);
		if (!len) {
			wget_fail("Image not found, no data returned\n",
				  tcp_seq_num, tcp_ack_num, action);
		} else {
			wget_connected(pkt, tcp_seq_num, action, tcp_ack_num, len);
		}
		break;
	case WGET_TRANSFERRING:
		debug_cond(DEBUG_WGET,
			   "wget: Transferring, seq=%x, ack=%x,len=%x\n",
			   tcp_seq_num, tcp_ack_num, len);

		if (tcp_seq_num >= initial_data_seq_num &&
		    store_block(pkt, tcp_seq_num - initial_data_seq_num,
				len) != 0) {
			wget_fail("wget: store error\n",
				  tcp_seq_num, tcp_ack_num, action);
			return;
		}

		switch (wget_tcp_state) {
		case TCP_FIN_WAIT_2:
			wget_send(TCP_ACK, tcp_seq_num, tcp_ack_num, len);
			fallthrough;
		case TCP_SYN_SENT:
		case TCP_SYN_RECEIVED:
		case TCP_CLOSING:
		case TCP_FIN_WAIT_1:
		case TCP_CLOSED:
			net_set_state(NETLOOP_FAIL);
			break;
		case TCP_ESTABLISHED:
			wget_send(TCP_ACK, tcp_seq_num, tcp_ack_num,
				  len);
			wget_loop_state = NETLOOP_SUCCESS;
			break;
		case TCP_CLOSE_WAIT:     /* End of transfer */
			current_wget_state = WGET_TRANSFERRED;
			wget_send(action | TCP_ACK | TCP_FIN,
				  tcp_seq_num, tcp_ack_num, len);
			break;
		}
		break;
	case WGET_TRANSFERRED:
		printf("Packets received %d, Transfer Successful\n", packets);
		net_set_state(wget_loop_state);
		break;
	}
}

#define RANDOM_PORT_START 1024
#define RANDOM_PORT_RANGE 0x4000

/**
 * random_port() - make port a little random (1024-17407)
 *
 * Return: random port number from 1024 to 17407
 *
 * This keeps the math somewhat trivial to compute, and seems to work with
 * all supported protocols/clients/servers
 */
static unsigned int random_port(void)
{
	return RANDOM_PORT_START + (get_timer(0) % RANDOM_PORT_RANGE);
}

#define BLOCKSIZE 512

void wget_start(void)
{
	image_url = strchr(net_boot_file_name, ':');
	if (image_url > 0) {
		web_server_ip = string_to_ip(net_boot_file_name);
		++image_url;
		net_server_ip = web_server_ip;
	} else {
		web_server_ip = net_server_ip;
		image_url = net_boot_file_name;
	}

	debug_cond(DEBUG_WGET,
		   "wget: Transfer HTTP Server %pI4; our IP %pI4\n",
		   &web_server_ip, &net_ip);

	/* Check if we need to send across this subnet */
	if (net_gateway.s_addr && net_netmask.s_addr) {
		struct in_addr our_net;
		struct in_addr server_net;

		our_net.s_addr = net_ip.s_addr & net_netmask.s_addr;
		server_net.s_addr = net_server_ip.s_addr & net_netmask.s_addr;
		if (our_net.s_addr != server_net.s_addr)
			debug_cond(DEBUG_WGET,
				   "wget: sending through gateway %pI4",
				   &net_gateway);
	}
	debug_cond(DEBUG_WGET, "URL '%s'\n", image_url);

	if (net_boot_file_expected_size_in_blocks) {
		debug_cond(DEBUG_WGET, "wget: Size is 0x%x Bytes = ",
			   net_boot_file_expected_size_in_blocks * BLOCKSIZE);
		print_size(net_boot_file_expected_size_in_blocks * BLOCKSIZE,
			   "");
	}
	debug_cond(DEBUG_WGET,
		   "\nwget:Load address: 0x%lx\nLoading: *\b", image_load_addr);

	net_set_timeout_handler(wget_timeout, wget_timeout_handler);
	tcp_set_tcp_handler(wget_handler);

	wget_timeout_count = 0;
	current_wget_state = WGET_CLOSED;

	our_port = random_port();

	/*
	 * Zero out server ether to force arp resolution in case
	 * the server ip for the previous u-boot command, for example dns
	 * is not the same as the web server ip.
	 */

	memset(net_server_ethaddr, 0, 6);

	wget_send(TCP_SYN, 0, 0, 0);
}
Commit	Line	Data
cfbae482 YCLP	1	// SPDX-License-Identifier: GPL-2.0
	2	/*
	3	* WGET/HTTP support driver based on U-BOOT's nfs.c
	4	* Copyright Duncan Hare <dh@synoia.com> 2017
	5	*/
	6
	7	#include <command.h>
	8	#include <common.h>
fe1489bc	9	#include <display_options.h>
cfbae482 YCLP	10	#include <env.h>
	11	#include <image.h>
	12	#include <mapmem.h>
	13	#include <net.h>
	14	#include <net/tcp.h>
	15	#include <net/wget.h>
	16
	17	static const char bootfile1[] = "GET ";
	18	static const char bootfile3[] = " HTTP/1.0\r\n\r\n";
	19	static const char http_eom[] = "\r\n\r\n";
	20	static const char http_ok[] = "200";
	21	static const char content_len[] = "Content-Length";
	22	static const char linefeed[] = "\r\n";
	23	static struct in_addr web_server_ip;
	24	static int our_port;
	25	static int wget_timeout_count;
	26
	27	struct pkt_qd {
	28	uchar *pkt;
	29	unsigned int tcp_seq_num;
	30	unsigned int len;
	31	};
	32
	33	/*
	34	* This is a control structure for out of order packets received.
	35	* The actual packet bufers are in the kernel space, and are
	36	* expected to be overwritten by the downloaded image.
	37	*/
	38	static struct pkt_qd pkt_q[PKTBUFSRX / 4];
	39	static int pkt_q_idx;
	40	static unsigned long content_length;
	41	static unsigned int packets;
	42
	43	static unsigned int initial_data_seq_num;
	44
	45	static enum wget_state current_wget_state;
	46
	47	static char *image_url;
	48	static unsigned int wget_timeout = WGET_TIMEOUT;
	49
	50	static enum net_loop_state wget_loop_state;
	51
	52	/* Timeout retry parameters */
	53	static u8 retry_action; /* actions for TCP retry */
	54	static unsigned int retry_tcp_ack_num; /* TCP retry acknowledge number*/
	55	static unsigned int retry_tcp_seq_num; /* TCP retry sequence number */
	56	static int retry_len; /* TCP retry length */
	57
	58	/**
	59	* store_block() - store block in memory
	60	* @src: source of data
	61	* @offset: offset
	62	* @len: length
	63	*/
	64	static inline int store_block(uchar *src, unsigned int offset, unsigned int len)
	65	{
	66	ulong newsize = offset + len;
	67	uchar *ptr;
	68
	69	ptr = map_sysmem(image_load_addr + offset, len);
	70	memcpy(ptr, src, len);
	71	unmap_sysmem(ptr);
	72
	73	if (net_boot_file_size < (offset + len))
74	net_boot_file_size = newsize;
75
76	return 0;
77	}
78
79	/**
80	* wget_send_stored() - wget response dispatcher
81	*
82	* WARNING, This, and only this, is the place in wget.c where
83	* SEQUENCE NUMBERS are swapped between incoming (RX)
84	* and outgoing (TX).
85	* Procedure wget_handler() is correct for RX traffic.
86	*/
87	static void wget_send_stored(void)
88	{
89	u8 action = retry_action;
90	int len = retry_len;
08fb8da3 DM	91	unsigned int tcp_ack_num = retry_tcp_seq_num + (len == 0 ? 1 : len);
08fb8da3 DM	92	unsigned int tcp_seq_num = retry_tcp_ack_num;
cfbae482 YCLP	93	uchar ptr, offset;
	94
	95	switch (current_wget_state) {
	96	case WGET_CLOSED:
	97	debug_cond(DEBUG_WGET, "wget: send SYN\n");
	98	current_wget_state = WGET_CONNECTING;
	99	net_send_tcp_packet(0, SERVER_PORT, our_port, action,
	100	tcp_seq_num, tcp_ack_num);
	101	packets = 0;
	102	break;
	103	case WGET_CONNECTING:
	104	pkt_q_idx = 0;
	105	net_send_tcp_packet(0, SERVER_PORT, our_port, action,
	106	tcp_seq_num, tcp_ack_num);
	107
	108	ptr = net_tx_packet + net_eth_hdr_size() +
	109	IP_TCP_HDR_SIZE + TCP_TSOPT_SIZE + 2;
	110	offset = ptr;
	111
	112	memcpy(offset, &bootfile1, strlen(bootfile1));
	113	offset += strlen(bootfile1);
	114
	115	memcpy(offset, image_url, strlen(image_url));
	116	offset += strlen(image_url);
	117
	118	memcpy(offset, &bootfile3, strlen(bootfile3));
	119	offset += strlen(bootfile3);
	120	net_send_tcp_packet((offset - ptr), SERVER_PORT, our_port,
	121	TCP_PUSH, tcp_seq_num, tcp_ack_num);
	122	current_wget_state = WGET_CONNECTED;
	123	break;
	124	case WGET_CONNECTED:
	125	case WGET_TRANSFERRING:
	126	case WGET_TRANSFERRED:
	127	net_send_tcp_packet(0, SERVER_PORT, our_port, action,
	128	tcp_seq_num, tcp_ack_num);
	129	break;
	130	}
	131	}
	132
08fb8da3 DM	133	static void wget_send(u8 action, unsigned int tcp_seq_num,
08fb8da3 DM	134	unsigned int tcp_ack_num, int len)
cfbae482 YCLP	135	{
	136	retry_action = action;
	137	retry_tcp_ack_num = tcp_ack_num;
	138	retry_tcp_seq_num = tcp_seq_num;
	139	retry_len = len;
	140
	141	wget_send_stored();
	142	}
	143
	144	void wget_fail(char *error_message, unsigned int tcp_seq_num,
	145	unsigned int tcp_ack_num, u8 action)
	146	{
	147	printf("wget: Transfer Fail - %s\n", error_message);
	148	net_set_timeout_handler(0, NULL);
	149	wget_send(action, tcp_seq_num, tcp_ack_num, 0);
	150	}
	151
	152	void wget_success(u8 action, unsigned int tcp_seq_num,
	153	unsigned int tcp_ack_num, int len, int packets)
	154	{
	155	printf("Packets received %d, Transfer Successful\n", packets);
	156	wget_send(action, tcp_seq_num, tcp_ack_num, len);
	157	}
	158
	159	/*
	160	* Interfaces of U-BOOT
	161	*/
	162	static void wget_timeout_handler(void)
	163	{
	164	if (++wget_timeout_count > WGET_RETRY_COUNT) {
	165	puts("\nRetry count exceeded; starting again\n");
	166	wget_send(TCP_RST, 0, 0, 0);
	167	net_start_again();
	168	} else {
	169	puts("T ");
	170	net_set_timeout_handler(wget_timeout +
	171	WGET_TIMEOUT * wget_timeout_count,
	172	wget_timeout_handler);
	173	wget_send_stored();
	174	}
	175	}
	176
	177	#define PKT_QUEUE_OFFSET 0x20000
	178	#define PKT_QUEUE_PACKET_SIZE 0x800
	179
	180	static void wget_connected(uchar *pkt, unsigned int tcp_seq_num,
08fb8da3	181	u8 action, unsigned int tcp_ack_num, unsigned int len)
cfbae482	182	{
cfbae482 YCLP	183	uchar *pkt_in_q;
	184	char *pos;
	185	int hlen, i;
	186	uchar *ptr1;
	187
	188	pkt[len] = '\0';
	189	pos = strstr((char *)pkt, http_eom);
	190
	191	if (!pos) {
	192	debug_cond(DEBUG_WGET,
	193	"wget: Connected, data before Header %p\n", pkt);
	194	pkt_in_q = (void *)image_load_addr + PKT_QUEUE_OFFSET +
	195	(pkt_q_idx * PKT_QUEUE_PACKET_SIZE);
	196
	197	ptr1 = map_sysmem((phys_addr_t)pkt_in_q, len);
	198	memcpy(ptr1, pkt, len);
	199	unmap_sysmem(ptr1);
	200
	201	pkt_q[pkt_q_idx].pkt = pkt_in_q;
	202	pkt_q[pkt_q_idx].tcp_seq_num = tcp_seq_num;
	203	pkt_q[pkt_q_idx].len = len;
	204	pkt_q_idx++;
	205	} else {
	206	debug_cond(DEBUG_WGET, "wget: Connected HTTP Header %p\n", pkt);
	207	/* sizeof(http_eom) - 1 is the string length of (http_eom) */
	208	hlen = pos - (char *)pkt + sizeof(http_eom) - 1;
	209	pos = strstr((char *)pkt, linefeed);
	210	if (pos > 0)
	211	i = pos - (char *)pkt;
	212	else
	213	i = hlen;
	214	printf("%.*s", i, pkt);
	215
	216	current_wget_state = WGET_TRANSFERRING;
	217
	218	if (strstr((char *)pkt, http_ok) == 0) {
	219	debug_cond(DEBUG_WGET,
	220	"wget: Connected Bad Xfer\n");
	221	initial_data_seq_num = tcp_seq_num + hlen;
	222	wget_loop_state = NETLOOP_FAIL;
	223	wget_send(action, tcp_seq_num, tcp_ack_num, len);
	224	} else {
	225	debug_cond(DEBUG_WGET,
	226	"wget: Connctd pkt %p hlen %x\n",
	227	pkt, hlen);
	228	initial_data_seq_num = tcp_seq_num + hlen;
	229
	230	pos = strstr((char *)pkt, content_len);
	231	if (!pos) {
	232	content_length = -1;
	233	} else {
	234	pos += sizeof(content_len) + 2;
	235	strict_strtoul(pos, 10, &content_length);
	236	debug_cond(DEBUG_WGET,
	237	"wget: Connected Len %lu\n",
	238	content_length);
	239	}
	240
	241	net_boot_file_size = 0;
	242
	243	if (len > hlen)
	244	store_block(pkt + hlen, 0, len - hlen);
	245
	246	debug_cond(DEBUG_WGET,
247	"wget: Connected Pkt %p hlen %x\n",
248	pkt, hlen);
249
250	for (i = 0; i < pkt_q_idx; i++) {
251	ptr1 = map_sysmem(
252	(phys_addr_t)(pkt_q[i].pkt),
253	pkt_q[i].len);
254	store_block(ptr1,
255	pkt_q[i].tcp_seq_num -
256	initial_data_seq_num,
257	pkt_q[i].len);
258	unmap_sysmem(ptr1);
259	debug_cond(DEBUG_WGET,
260	"wget: Connctd pkt Q %p len %x\n",
261	pkt_q[i].pkt, pkt_q[i].len);
262	}
263	}
264	}
265	wget_send(action, tcp_seq_num, tcp_ack_num, len);
266	}
267
268	/**
08fb8da3 DM	269	* wget_handler() - TCP handler of wget
	270	* @pkt: pointer to the application packet
	271	* @dport: destination TCP port
	272	* @sip: source IP address
	273	* @sport: source TCP port
	274	* @tcp_seq_num: TCP sequential number
	275	* @tcp_ack_num: TCP acknowledgment number
	276	* @action: TCP action (SYN, ACK, FIN, etc)
	277	* @len: packet length
cfbae482 YCLP	278	*
	279	* In the "application push" invocation, the TCP header with all
	280	* its information is pointed to by the packet pointer.
	281	*/
08fb8da3 DM	282	static void wget_handler(uchar *pkt, u16 dport,
	283	struct in_addr sip, u16 sport,
	284	u32 tcp_seq_num, u32 tcp_ack_num,
	285	u8 action, unsigned int len)
cfbae482 YCLP	286	{
cfbae482 YCLP	287	enum tcp_state wget_tcp_state = tcp_get_tcp_state();
cfbae482 YCLP	288
	289	net_set_timeout_handler(wget_timeout, wget_timeout_handler);
	290	packets++;
	291
	292	switch (current_wget_state) {
	293	case WGET_CLOSED:
	294	debug_cond(DEBUG_WGET, "wget: Handler: Error!, State wrong\n");
	295	break;
	296	case WGET_CONNECTING:
	297	debug_cond(DEBUG_WGET,
08fb8da3	298	"wget: Connecting In len=%x, Seq=%u, Ack=%u\n",
cfbae482 YCLP	299	len, tcp_seq_num, tcp_ack_num);
	300	if (!len) {
	301	if (wget_tcp_state == TCP_ESTABLISHED) {
	302	debug_cond(DEBUG_WGET,
	303	"wget: Cting, send, len=%x\n", len);
	304	wget_send(action, tcp_seq_num, tcp_ack_num,
	305	len);
	306	} else {
	307	printf("%.*s", len, pkt);
	308	wget_fail("wget: Handler Connected Fail\n",
	309	tcp_seq_num, tcp_ack_num, action);
	310	}
	311	}
	312	break;
	313	case WGET_CONNECTED:
08fb8da3	314	debug_cond(DEBUG_WGET, "wget: Connected seq=%u, len=%x\n",
cfbae482 YCLP	315	tcp_seq_num, len);
	316	if (!len) {
	317	wget_fail("Image not found, no data returned\n",
	318	tcp_seq_num, tcp_ack_num, action);
	319	} else {
08fb8da3	320	wget_connected(pkt, tcp_seq_num, action, tcp_ack_num, len);
cfbae482 YCLP	321	}
	322	break;
	323	case WGET_TRANSFERRING:
	324	debug_cond(DEBUG_WGET,
	325	"wget: Transferring, seq=%x, ack=%x,len=%x\n",
	326	tcp_seq_num, tcp_ack_num, len);
	327
	328	if (tcp_seq_num >= initial_data_seq_num &&
	329	store_block(pkt, tcp_seq_num - initial_data_seq_num,
	330	len) != 0) {
	331	wget_fail("wget: store error\n",
	332	tcp_seq_num, tcp_ack_num, action);
	333	return;
	334	}
	335
	336	switch (wget_tcp_state) {
	337	case TCP_FIN_WAIT_2:
	338	wget_send(TCP_ACK, tcp_seq_num, tcp_ack_num, len);
	339	fallthrough;
	340	case TCP_SYN_SENT:
08fb8da3	341	case TCP_SYN_RECEIVED:
cfbae482 YCLP	342	case TCP_CLOSING:
	343	case TCP_FIN_WAIT_1:
	344	case TCP_CLOSED:
	345	net_set_state(NETLOOP_FAIL);
	346	break;
	347	case TCP_ESTABLISHED:
	348	wget_send(TCP_ACK, tcp_seq_num, tcp_ack_num,
	349	len);
	350	wget_loop_state = NETLOOP_SUCCESS;
	351	break;
	352	case TCP_CLOSE_WAIT: /* End of transfer */
	353	current_wget_state = WGET_TRANSFERRED;
	354	wget_send(action \| TCP_ACK \| TCP_FIN,
	355	tcp_seq_num, tcp_ack_num, len);
	356	break;
	357	}
	358	break;
	359	case WGET_TRANSFERRED:
	360	printf("Packets received %d, Transfer Successful\n", packets);
	361	net_set_state(wget_loop_state);
	362	break;
	363	}
	364	}
	365
	366	#define RANDOM_PORT_START 1024
	367	#define RANDOM_PORT_RANGE 0x4000
	368
	369	/**
	370	* random_port() - make port a little random (1024-17407)
	371	*
	372	* Return: random port number from 1024 to 17407
	373	*
	374	* This keeps the math somewhat trivial to compute, and seems to work with
	375	* all supported protocols/clients/servers
	376	*/
	377	static unsigned int random_port(void)
	378	{
	379	return RANDOM_PORT_START + (get_timer(0) % RANDOM_PORT_RANGE);
	380	}
	381
	382	#define BLOCKSIZE 512
	383
	384	void wget_start(void)
	385	{
	386	image_url = strchr(net_boot_file_name, ':');
	387	if (image_url > 0) {
	388	web_server_ip = string_to_ip(net_boot_file_name);
	389	++image_url;
	390	net_server_ip = web_server_ip;
	391	} else {
	392	web_server_ip = net_server_ip;
	393	image_url = net_boot_file_name;
	394	}
	395
	396	debug_cond(DEBUG_WGET,
	397	"wget: Transfer HTTP Server %pI4; our IP %pI4\n",
	398	&web_server_ip, &net_ip);
	399
	400	/* Check if we need to send across this subnet */
	401	if (net_gateway.s_addr && net_netmask.s_addr) {
	402	struct in_addr our_net;
	403	struct in_addr server_net;
	404
	405	our_net.s_addr = net_ip.s_addr & net_netmask.s_addr;
406	server_net.s_addr = net_server_ip.s_addr & net_netmask.s_addr;
407	if (our_net.s_addr != server_net.s_addr)
408	debug_cond(DEBUG_WGET,
409	"wget: sending through gateway %pI4",
410	&net_gateway);
411	}
412	debug_cond(DEBUG_WGET, "URL '%s'\n", image_url);
413
414	if (net_boot_file_expected_size_in_blocks) {
415	debug_cond(DEBUG_WGET, "wget: Size is 0x%x Bytes = ",
416	net_boot_file_expected_size_in_blocks * BLOCKSIZE);
417	print_size(net_boot_file_expected_size_in_blocks * BLOCKSIZE,
418	"");
419	}
420	debug_cond(DEBUG_WGET,
421	"\nwget:Load address: 0x%lx\nLoading: *\b", image_load_addr);
422
423	net_set_timeout_handler(wget_timeout, wget_timeout_handler);
424	tcp_set_tcp_handler(wget_handler);
425
426	wget_timeout_count = 0;
427	current_wget_state = WGET_CLOSED;
428
429	our_port = random_port();
430
431	/*
432	* Zero out server ether to force arp resolution in case
433	* the server ip for the previous u-boot command, for example dns
434	* is not the same as the web server ip.
435	*/
436
437	memset(net_server_ethaddr, 0, 6);
438
439	wget_send(TCP_SYN, 0, 0, 0);
440	}