[U-Boot] [PATCH v12 3/3] Add wget application
Christian Gmeiner
christian.gmeiner at gmail.com
Tue Aug 14 07:43:29 UTC 2018
Am Mo., 25. Juni 2018 um 00:42 Uhr schrieb <DH at synoia.com>:
>
> From: Duncan Hare <DuncanCHare at yahoo.com>
>
> Commit-notes
> All the code is new, and not copied from any source
>
> Test wget
>
> wget is a general purpose TCP/IP program. There is a Linux/unix version
> of wget, which enables server verification without running u-boot.
>
> 1. The python distribution include a simple http request handler.
> To use it with u-boot and Linux wget start the python server
> in the directory which contains your test files.
>
> sudo python -m SimplleHTTPServer 80
>
> sudo becuse the port number used is lower than 1,000.
> Leave this window open.
>
> Then test the server, in a directory different from your directory
> containing test file, assuming a test file named "test file.name"
> at a Linux command prompt enter:
>
> wget localhost/testfile.name
>
> and the file should be transferred to the receiving directory.
>
> The server verification is now complete.
>
> 2. wget in u-boot needs a load address, server ip address, an ip
> address, optional file path, and file name.
>
> The server and u-boot ip address can be 127.0.0.1. The routing is then
> between the u-boot test environment and the server in the same machine.
>
> u-boot script example
>
> env set ipaddr 127.0.0.1; env set loadaddr 0x8000000;
> wget 127.0.0.1 testfile.name
>
> or
>
> env set ipaddr 127.0.0.1; env set loadaddr 0x8000000;
> wget 127.0.0.1 pathname/testfile.name
>
> wget prints a progress "|" every 127 packets, and at the end of transfer
> prints a message of success or fail, and bytes transferred.
>
> When testing u-boot, we first did a large file transfer with wget
> and then modified tftp to download the same file and verify wget's
> transfer was both complete and correct, with a strcmp function replacing
> the copy to kernel area code fragment.
> END
>
> Cover-letter
> Add TCP and WGET
> This is a limited implementation of a TCP, a receiver, with
> selective acknowledgment (SACK), and wget as a transfer protocol over TCP.
>
> TCP with SACK provides maximum transfer rates over fast and fast multi-hop
> networks. TCP continues stream transfer if packets are dropped, and then
> recoveres dropped packed asynchronously.
>
> WGET is a very efficient file transfer protocol running over TCP.
> There is a single request for each file transferred, irrespective of file size.
> END
>
> Signed-off-by: Duncan Hare <DuncanCHare at yahoo.com>
> ---
>
> cmd/Kconfig | 7 +
> cmd/net.c | 13 ++
> include/net.h | 2 +-
> include/net/wget.h | 19 +++
> net/Makefile | 2 +-
> net/net.c | 9 +-
> net/wget.c | 426 +++++++++++++++++++++++++++++++++++++++++++++++++++++
> 7 files changed, 475 insertions(+), 3 deletions(-)
> create mode 100644 include/net/wget.h
> create mode 100644 net/wget.c
>
> diff --git a/cmd/Kconfig b/cmd/Kconfig
> index 45c83359ad..fb9c894363 100644
> --- a/cmd/Kconfig
> +++ b/cmd/Kconfig
> @@ -1192,6 +1192,13 @@ config CMD_NFS
> help
> Boot image via network using NFS protocol.
>
> +config CMD_WGET
> + bool "wget"
> + select TCP
> + help
> + Download kernel, or other files, from a web server over TCP.
> + Fast file transfer over networks with latenc
> +
> config CMD_MII
> bool "mii"
> help
> diff --git a/cmd/net.c b/cmd/net.c
> index f83839c35e..f5fde849c4 100644
> --- a/cmd/net.c
> +++ b/cmd/net.c
> @@ -113,6 +113,19 @@ 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 ba96267eb8..14b013083d 100644
> --- a/include/net.h
> +++ b/include/net.h
> @@ -539,7 +539,7 @@ extern int net_restart_wrap; /* Tried all network devices */
>
> enum proto_t {
> BOOTP, RARP, ARP, TFTPGET, DHCP, PING, DNS, NFS, CDP, NETCONS, SNTP,
> - TFTPSRV, TFTPPUT, LINKLOCAL, FASTBOOT
> + TFTPSRV, TFTPPUT, LINKLOCAL, FASTBOOT, WGET
> };
>
> extern char net_boot_file_name[1024];/* Boot File name */
> diff --git a/include/net/wget.h b/include/net/wget.h
> new file mode 100644
> index 0000000000..61bdd851f9
> --- /dev/null
> +++ b/include/net/wget.h
> @@ -0,0 +1,19 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +/*
> + * 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/Makefile b/net/Makefile
> index 237023407f..882af145aa 100644
> --- a/net/Makefile
> +++ b/net/Makefile
> @@ -23,8 +23,8 @@ obj-$(CONFIG_CMD_PING) += ping.o
> obj-$(CONFIG_CMD_RARP) += rarp.o
> obj-$(CONFIG_CMD_SNTP) += sntp.o
> obj-$(CONFIG_CMD_TFTPBOOT) += tftp.o
> -obj-$(CONFIG_UDP_FUNCTION_FASTBOOT) += fastboot.o
> obj-$(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)
> diff --git a/net/net.c b/net/net.c
> index 8ac1ff050f..39707d5b18 100644
> --- a/net/net.c
> +++ b/net/net.c
> @@ -109,6 +109,7 @@
> #include "sntp.h"
> #endif
> #include <net/tcp.h>
> +#include <net/wget.h>
>
> /** BOOTP EXTENTIONS **/
>
> @@ -494,6 +495,11 @@ restart:
> nfs_start();
> break;
> #endif
> +#if defined(CONFIG_CMD_WGET)
> + case WGET:
> + wget_start();
> + break;
> +#endif
> #if defined(CONFIG_CMD_CDP)
> case CDP:
> cdp_start();
> @@ -1540,7 +1546,8 @@ void copy_filename(char *dst, const char *src, int size)
>
> #if defined(CONFIG_CMD_NFS) || \
> defined(CONFIG_CMD_SNTP) || \
> - defined(CONFIG_CMD_DNS)
> + defined(CONFIG_CMD_DNS) || \
> + defined(CONFIG_CMD_WGET)
> /*
> * make port a little random (1024-17407)
> * This keeps the math somewhat trivial to compute, and seems to work with
> diff --git a/net/wget.c b/net/wget.c
> new file mode 100644
> index 0000000000..8238ec52c4
> --- /dev/null
> +++ b/net/wget.c
> @@ -0,0 +1,426 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * WGET/HTTP support driver based on U-BOOT's nfs.c
> + * Copyright Duncan Hare <dh at synoia.com> 2017
> + */
> +
> +#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";
Make all of them static const char ... ?
> +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 retry_action;
> +static unsigned int retry_tcp_ack_num;
> +static unsigned int retry_tcp_seq_num;
> +static int retry_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 = retry_action;
> + unsigned int tcp_ack_num = retry_tcp_ack_num;
> + unsigned int tcp_seq_num = retry_tcp_seq_num;
> + int len = retry_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)
> +{
> + 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("%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;
> + printf("%.*s", i, pkt);
> +
> + 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.
> + */
interesting indentation...
> +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 {
> + 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=%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);
> + return;
> + }
> +
> + 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 > 0) {
> + 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 to forece apr resolution in case
> + * the server ip for the previous u-boot commsnd, for exanple dns
> + * is not the same as the web server ip.
> + */
> +
> + memset(net_server_ethaddr, 0, 6);
> +
> + wget_send(TCP_SYN, 0, 0, 0);
> +}
> --
> 2.11.0
>
> _______________________________________________
> U-Boot mailing list
> U-Boot at lists.denx.de
> https://lists.denx.de/listinfo/u-boot
--
greets
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Christian Gmeiner, MSc
https://christian-gmeiner.info
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