From: Duncan Hare <duncanch...@yahoo.com>
Why http and wget:
HTTP is the most efficient file retrieval protocol in common
use. The client send a single request, after TCP connection,
to receive a file of any length.
WGET is the application which implements http file transfer
outside browsers as a file transfer protocol. Versions of
wget exists on many operating systems.
END
Signed-off-by: Duncan Hare <duncanch...@yahoo.com>
---
Changes in v10: None
cmd/Kconfig | 5 +
cmd/net.c | 13 ++
include/net.h | 16 +-
include/net/wget.h | 17 +++
net/Kconfig | 7 +-
net/Makefile | 1 +
net/wget.c | 420 +++++++++++++++++++++++++++++++++++++++++++++++++++++
7 files changed, 470 insertions(+), 9 deletions(-)
create mode 100644 include/net/wget.h
create mode 100644 net/wget.c
diff --git a/cmd/Kconfig b/cmd/Kconfig
index 136836d146..1113d69950 100644
--- a/cmd/Kconfig
+++ b/cmd/Kconfig
@@ -1094,6 +1094,11 @@ config CMD_ETHSW
operations such as enabling / disabling a port and
viewing/maintaining the filtering database (FDB)
+config CMD_WGET
+ bool "wget"
+ select TCP
+ help
+ Download a kernel, or other files, from a web server over TCP.
endif
endmenu
diff --git a/cmd/net.c b/cmd/net.c
index d7c776aacf..6a7a51f357 100644
--- a/cmd/net.c
+++ b/cmd/net.c
@@ -110,6 +110,19 @@ U_BOOT_CMD(
);
#endif
+#if defined(CONFIG_CMD_WGET)
+static int do_wget(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
+{
+ return netboot_common(WGET, cmdtp, argc, argv);
+}
+
+U_BOOT_CMD(
+ wget, 3, 1, do_wget,
+ "boot image via network using HTTP protocol",
+ "[loadAddress] [[hostIPaddr:]path and image name]"
+);
+#endif
+
static void netboot_update_env(void)
{
char tmp[22];
diff --git a/include/net.h b/include/net.h
index e29d804a23..ec44bf2bec 100644
--- a/include/net.h
+++ b/include/net.h
@@ -15,10 +15,14 @@
#include <asm/cache.h>
#include <asm/byteorder.h> /* for nton* / ntoh* stuff */
-#define DEBUG_LL_STATE 0 /* Link local state machine changes */
-#define DEBUG_DEV_PKT 0 /* Packets or info directed to the device */
+#define DEBUG_LL_STATE 0 /* Link local state machine changes */
+#define DEBUG_DEV_PKT 0 /* Packets or info directed to the device */
#define DEBUG_NET_PKT 0 /* Packets on info on the network at large */
-#define DEBUG_INT_STATE 0 /* Internal network state changes */
+#define DEBUG_INT_STATE 0 /* Internal network state change */
+
+#if defined(CONFIG_TCP)
+#define CONFIG_SYS_RX_ETH_BUFFER 12 /* For TCP */
+#endif
/*
* The number of receive packet buffers, and the required packet buffer
@@ -31,10 +35,6 @@
* data, the sending TCP will stop sending.
*/
-#if defined(CONFIG_TCP)
-#define CONFIG_SYS_RX_ETH_BUFFER 12 /* For TCP */
-#endif
-
#ifdef CONFIG_SYS_RX_ETH_BUFFER
# define PKTBUFSRX CONFIG_SYS_RX_ETH_BUFFER
#else
@@ -362,8 +362,8 @@ struct vlan_ethernet_hdr {
#define PROT_PPP_SES 0x8864 /* PPPoE session messages */
#define IPPROTO_ICMP 1 /* Internet Control Message Protocol */
+#define IPPROTO_TCP 6 /* Transmission Control Protocol */
#define IPPROTO_UDP 17 /* User Datagram Protocol */
-#define IPPROTO_TCP 6 /* Transmission Control Protocol */
/*
* Internet Protocol (IP) header.
diff --git a/include/net/wget.h b/include/net/wget.h
new file mode 100644
index 0000000000..dce16c573d
--- /dev/null
+++ b/include/net/wget.h
@@ -0,0 +1,17 @@
+/*
+ * Duncan Hare Copyright 2017
+ */
+
+void wget_start(void); /* Begin wget */
+
+enum WGET_STATE {
+ WGET_CLOSED,
+ WGET_CONNECTING,
+ WGET_CONNECTED,
+ WGET_TRANSFERRING,
+ WGET_TRANSFERRED};
+
+#define DEBUG_WGET 0 /* Set to 1 for debug messges */
+#define SERVER_PORT 80
+#define WGET_RETRY_COUNT 30
+#define WGET_TIMEOUT 2000UL
diff --git a/net/Kconfig b/net/Kconfig
index cc6dd83fc4..c973def3b8 100644
--- a/net/Kconfig
+++ b/net/Kconfig
@@ -36,7 +36,12 @@ config NET_TFTP_VARS
config TCP
bool "Include Subset TCP stack for wget"
help
- TCP protocol support for wget.
+ Selecting TCP protocol support adds TCP for receiving
+ streams of data. The TCP packets are presented
+ as received (possibly out of order). The application
+ receiving the TCP stream places the date by sequence number
+ as an offset from the kernel address. TCP transmission is
+ not supported.
config BOOTP_BOOTPATH
bool "Enable BOOTP BOOTPATH"
diff --git a/net/Makefile b/net/Makefile
index 25729ebeeb..f83df5b728 100644
--- a/net/Makefile
+++ b/net/Makefile
@@ -26,6 +26,7 @@ obj-$(CONFIG_CMD_RARP) += rarp.o
obj-$(CONFIG_CMD_SNTP) += sntp.o
obj-$(CONFIG_CMD_NET) += tftp.o
obj-$(CONFIG_TCP) += tcp.o
+obj-$(CONFIG_CMD_WGET) += wget.o
# Disable this warning as it is triggered by:
# sprintf(buf, index ? "foo%d" : "foo", index)
# and this is intentional usage.
diff --git a/net/wget.c b/net/wget.c
new file mode 100644
index 0000000000..5429a1f7b1
--- /dev/null
+++ b/net/wget.c
@@ -0,0 +1,420 @@
+/*
+ * WGET/HTTP support driver based on U-BOOT's nfs.c
+ * Copyright Duncan Hare <d...@synoia.com> 2017
+ * SPDX-License-Identifier:GPL-2.0+
+ */
+
+#include <common.h>
+#include <command.h>
+#include <mapmem.h>
+#include <net.h>
+#include <net/wget.h>
+#include <net/tcp.h>
+
+const char bootfile1[] = "GET ";
+const char bootfile3[] = " HTTP/1.0\r\n\r\n";
+const char http_eom[] = "\r\n\r\n";
+const char http_ok[] = "200";
+const char content_len[] = "Content-Length";
+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 wget_state;
+
+static char *image_url;
+static unsigned int wget_timeout = WGET_TIMEOUT;
+
+static void wget_timeout_handler(void);
+
+static enum net_loop_state wget_loop_state;
+
+/* Timeout retry parameters */
+static u8 r_action;
+static unsigned int r_tcp_ack_num;
+static unsigned int r_tcp_seq_num;
+static int r_len;
+
+static inline int store_block(uchar *src, unsigned int offset, unsigned int
len)
+{
+ ulong newsize = offset + len;
+ uchar *ptr;
+
+#ifdef CONFIG_SYS_DIRECT_FLASH_WGET
+ int i, rc = 0;
+
+ for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) {
+ /* start address in flash? */
+ if (load_addr + offset >= flash_info[i].start[0]) {
+ rc = 1;
+ break;
+ }
+ }
+
+ if (rc) { /* Flash is destination for this packet */
+ rc = flash_write((uchar *)src,
+ (ulong)(load_addr + offset), len);
+ if (rc) {
+ flash_perror(rc);
+ return -1;
+ }
+ } else {
+#endif /* CONFIG_SYS_DIRECT_FLASH_WGET */
+
+ ptr = map_sysmem(load_addr + offset, len);
+ memcpy(ptr, src, len);
+ unmap_sysmem(ptr);
+
+#ifdef CONFIG_SYS_DIRECT_FLASH_WGET
+ }
+#endif
+ if (net_boot_file_size < (offset + len))
+ net_boot_file_size = newsize;
+ return 0;
+}
+
+/*
+ * 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 = r_action;
+ unsigned int tcp_ack_num = r_tcp_ack_num;
+ unsigned int tcp_seq_num = r_tcp_seq_num;
+ int len = r_len;
+ uchar *ptr;
+ uchar *offset;
+
+ tcp_ack_num = tcp_ack_num + len;
+
+ switch (wget_state) {
+ case WGET_CLOSED:
+ debug_cond(DEBUG_WGET, "wget: send SYN\n");
+ 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 = offset + strlen(bootfile1);
+
+ memcpy(offset, image_url, strlen(image_url));
+ offset = offset + strlen(image_url);
+
+ memcpy(offset, &bootfile3, strlen(bootfile3));
+ offset = offset + strlen(bootfile3);
+ net_send_tcp_packet((offset - ptr), SERVER_PORT, our_port,
+ TCP_PUSH, tcp_seq_num, tcp_ack_num);
+ 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_ack_num,
+ unsigned int tcp_seq_num, int len)
+{
+ r_action = action;
+ r_tcp_ack_num = tcp_ack_num;
+ r_tcp_seq_num = tcp_seq_num;
+ r_len = len;
+ wget_send_stored();
+}
+
+void wget_fail(char *error_message, unsigned int tcp_seq_num,
+ unsigned int tcp_ack_num, u8 action)
+{
+ printf("%s", error_message);
+ printf("%s", "wget: Transfer Fail\n");
+ 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();
+ }
+}
+
+static void wget_connected(uchar *pkt, unsigned int tcp_seq_num,
+ struct in_addr action_and_state,
+ unsigned int tcp_ack_num, unsigned int len)
+{
+ u8 action = action_and_state.s_addr;
+ uchar *pkt_in_q;
+ char *pos;
+ int hlen;
+ int i;
+
+ pkt[len] = '\0';
+ pos = strstr((char *)pkt, http_eom);
+
+ if (pos == 0) {
+ debug_cond(DEBUG_WGET,
+ "wget: Connected, data before Header %p\n", pkt);
+ pkt_in_q = (void *)load_addr + 0x20000 + (pkt_q_idx * 0x800);
+ memcpy(pkt_in_q, pkt, len);
+ 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);
+ hlen = pos - (char *)pkt + sizeof(http_eom) - 1;
+ pos = strstr((char *)pkt, linefeed);
+ if (pos > 0)
+ i = pos - (char *)pkt;
+ else
+ i = hlen;
+ tcp_print_buffer(pkt, i, i, -1, 0);
+
+ wget_state = WGET_TRANSFERRING;
+
+ if (strstr((char *)pkt, http_ok) == 0) {
+ debug_cond(DEBUG_WGET,
+ "wget: Connected Bad Xfer\n");
+ 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 = 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++) {
+ store_block(pkt_q[i].pkt,
+ pkt_q[i].tcp_seq_num -
+ initial_data_seq_num,
+ pkt_q[i].len);
+ 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);
+}
+
+ /*
+ * In the "application push" invocation, the TCP header with all
+ * its information is pointed to by the packet pointer.
+ *
+ * in the typedef
+ * void rxhand_tcp(uchar *pkt, unsigned int dport,
+ * struct in_addr sip, unsigned int sport,
+ * unsigned int len);
+ * *pkt is the pointer to the payload
+ * dport is used for tcp_seg_num
+ * action_and_state.s_addr is used for TCP state
+ * sport is used for tcp_ack_num (which is unused by the app)
+ * pkt_ length is the payload length.
+ */
+static void wget_handler(uchar *pkt, unsigned int tcp_seq_num,
+ struct in_addr action_and_state,
+ unsigned int tcp_ack_num, unsigned int len)
+{
+ enum TCP_STATE wget_tcp_state = tcp_get_tcp_state();
+ u8 action = action_and_state.s_addr;
+
+ net_set_timeout_handler(wget_timeout, wget_timeout_handler);
+ packets++;
+
+ switch (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=%x, Ack=%x\n",
+ len, tcp_seq_num, tcp_ack_num);
+ if (len == 0) {
+ 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 {
+ tcp_print_buffer(pkt, len, len, -1, 0);
+ 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=%x, len=%x\n",
+ tcp_seq_num, len);
+ if (len == 0) {
+ wget_fail("Image not found, no data returned\n",
+ tcp_seq_num, tcp_ack_num, action);
+ } else {
+ wget_connected(pkt, tcp_seq_num, action_and_state,
+ 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 (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);
+ } else {
+ switch (wget_tcp_state) {
+ case TCP_FIN_WAIT_2:
+ wget_send(TCP_ACK, tcp_seq_num, tcp_ack_num,
+ len);
+ case TCP_SYN_SENT:
+ 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 */
+ 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;
+ }
+}
+
+void wget_start(void)
+{
+ debug_cond(DEBUG_WGET, "%s\n", __func__);
+
+ image_url = strchr(net_boot_file_name, ':');
+ if (!image_url) {
+ web_server_ip = string_to_ip(net_boot_file_name);
+ ++image_url;
+ } 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 << 9);
+ print_size(net_boot_file_expected_size_in_blocks << 9, "");
+ }
+ debug_cond(DEBUG_WGET,
+ "\nwget:Load address: 0x%lx\nLoading: *\b", load_addr);
+
+ net_set_timeout_handler(wget_timeout, wget_timeout_handler);
+ tcp_set_tcp_handler(wget_handler);
+
+ wget_timeout_count = 0;
+ wget_state = WGET_CLOSED;
+
+ our_port = random_port();
+
+ /* zero out server ether in case the server ip has changed */
+ memset(net_server_ethaddr, 0, 6);
+
+ wget_send(TCP_SYN, 0, 0, 0);
+}
--
2.11.0
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