[PATCH v20 2/4] net: Add wget application
Ramon Fried
rfried.dev at gmail.com
Wed Nov 9 09:23:52 CET 2022
On Wed, Nov 9, 2022 at 4:26 AM Ying-Chun Liu (PaulLiu)
<paul.liu at linaro.org> wrote:
>
>
>
> On 2022/11/9 05:03, Sean Anderson wrote:
> > On 11/8/22 01:17, Ying-Chun Liu (PaulLiu) wrote:
> >> From: "Ying-Chun Liu (PaulLiu)" <paul.liu at linaro.org>
> >>
> >> This commit adds a simple wget command that can download files
> >> from http server.
> >>
> >> The command syntax is
> >> wget ${loadaddr} <path of the file from server>
> >>
> >> Signed-off-by: Duncan Hare <DuncanCHare at yahoo.com>
> >> Signed-off-by: Ying-Chun Liu (PaulLiu) <paul.liu at linaro.org>
> >> Reviewed-by: Simon Glass <sjg at chromium.org>
> >> Cc: Christian Gmeiner <christian.gmeiner at gmail.com>
> >> Cc: Joe Hershberger <joe.hershberger at ni.com>
> >> Cc: Michal Simek <michal.simek at xilinx.com>
> >> Cc: Ramon Fried <rfried.dev at gmail.com>
> >> ---
> >> v1-v12: Made by Duncan, didn't tracked.
> >> v13: Fix some issues which is reviewed by Christian
> >> v14: Add options to enable/disable SACK.
> >> v15: Fix various syntax errors reviewed by Michal.
> >> Remove magic numbers. Use kernel-doc format.
> >> v16: Add more kernel-doc. Fix more double spaces.
> >> v17: Fix wget with address timeout issue reported by Ramon.
> >> v20: Rebase to latest master and resolve conflict.
> >> ---
> >> cmd/Kconfig | 7 +
> >> cmd/net.c | 13 ++
> >> include/net.h | 2 +-
> >> include/net/wget.h | 22 +++
> >> net/Makefile | 1 +
> >> net/net.c | 6 +
> >> net/wget.c | 438 +++++++++++++++++++++++++++++++++++++++++++++
> >> 7 files changed, 488 insertions(+), 1 deletion(-)
> >> create mode 100644 include/net/wget.h
> >> create mode 100644 net/wget.c
> >>
> >> diff --git a/cmd/Kconfig b/cmd/Kconfig
> >> index 105406496e..d093581b24 100644
> >> --- a/cmd/Kconfig
> >> +++ b/cmd/Kconfig
> >> @@ -1798,6 +1798,13 @@ config SYS_DISABLE_AUTOLOAD
> >> is complete. Enable this option to disable this behavior and instead
> >> require files to be loaded over the network by subsequent commands.
> >>
> >> +config CMD_WGET
> >> + bool "wget"
> >> + select TCP
> >> + help
> >> + wget is a simple command to download kernel, or other files,
> >> + from a http server over TCP.
> >> +
> >> config CMD_MII
> >> bool "mii"
> >> imply CMD_MDIO
> >> diff --git a/cmd/net.c b/cmd/net.c
> >> index addcad3ac1..f6d9f5ea3a 100644
> >> --- a/cmd/net.c
> >> +++ b/cmd/net.c
> >> @@ -125,6 +125,19 @@ U_BOOT_CMD(
> >> );
> >> #endif
> >>
> >> +#if defined(CONFIG_CMD_WGET)
> >> +static int do_wget(struct cmd_tbl *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 f4140523c2..e0c7804827 100644
> >> --- a/include/net.h
> >> +++ b/include/net.h
> >> @@ -561,7 +561,7 @@ 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, WOL, UDP, NCSI
> >> + TFTPSRV, TFTPPUT, LINKLOCAL, FASTBOOT, WOL, UDP, NCSI, 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..da0920de11
> >> --- /dev/null
> >> +++ b/include/net/wget.h
> >> @@ -0,0 +1,22 @@
> >> +/* SPDX-License-Identifier: GPL-2.0 */
> >> +/*
> >> + * Duncan Hare Copyright 2017
> >> + */
> >> +
> >> +/**
> >> + * wget_start() - begin wget
> >> + */
> >> +void wget_start(void);
> >> +
> >> +enum wget_state {
> >> + WGET_CLOSED,
> >> + WGET_CONNECTING,
> >> + WGET_CONNECTED,
> >> + WGET_TRANSFERRING,
> >> + WGET_TRANSFERRED
> >> +};
> >> +
> >> +#define DEBUG_WGET 0 /* Set to 1 for debug messages */
> >> +#define SERVER_PORT 80
> >> +#define WGET_RETRY_COUNT 30
> >> +#define WGET_TIMEOUT 2000UL
> >> diff --git a/net/Makefile b/net/Makefile
> >> index d131d1cb1a..4f757a224c 100644
> >> --- a/net/Makefile
> >> +++ b/net/Makefile
> >> @@ -31,6 +31,7 @@ obj-$(CONFIG_UDP_FUNCTION_FASTBOOT) += fastboot.o
> >> obj-$(CONFIG_CMD_WOL) += wol.o
> >> obj-$(CONFIG_PROT_UDP) += udp.o
> >> obj-$(CONFIG_PROT_TCP) += tcp.o
> >> +obj-$(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 7878a9970b..8c630f9467 100644
> >> --- a/net/net.c
> >> +++ b/net/net.c
> >> @@ -118,6 +118,7 @@
> >> #include "wol.h"
> >> #endif
> >> #include <net/tcp.h>
> >> +#include <net/wget.h>
> >>
> >> /** BOOTP EXTENTIONS **/
> >>
> >> @@ -517,6 +518,11 @@ 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();
> >> diff --git a/net/wget.c b/net/wget.c
> >> new file mode 100644
> >> index 0000000000..3826c4b364
> >> --- /dev/null
> >> +++ b/net/wget.c
> >> @@ -0,0 +1,438 @@
> >> +// 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 <command.h>
> >> +#include <common.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_ack_num + len;
> >> + unsigned int tcp_seq_num = retry_tcp_seq_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_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("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,
> >> + 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, 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() - handler of wget
> >> + * @pkt: the pointer to the payload
> >> + * @tcp_seq_num: tcp sequence number
> >> + * @action_and_state: TCP state
> >> + * @tcp_ack_num: tcp acknowledge number
> >> + * @len: length of the payload
> >> + *
> >> + * 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, 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 (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=%x, Ack=%x\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=%x, 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_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 (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_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, ':');
> >
> > Why do we use colon as the separator here? Can't we split on '/'?
> >
> > --Sean
>
> Hi Sean,
>
> We use colon here because the other network commands are using colon.
> For example,
> tftpboot [loadAddress] [[hostIPaddr:]bootfilename]
> nfs [loadAddress] [[hostIPaddr:]bootfilename]
>
> So we are
> wget [loadAddress] [[hostIPaddr:]path and image name]
>
> That also means ':' is not necessary if we set serverip variable.
>
> In the meanwhile we only support this command syntax.
> But this syntax is not conflict with http://xxx.xxx.xxx.xxx/yyy.
> We can add that syntax later when we want to support SSL.
>
> I mean if we see [[hostIPaddr:]path and image name] or
> http://xxx.xxx.xxx.xxx[:port]/yyy we go http.
> If we see https://xxx.xxx.xxx.xxx[:port]/yyy we go SSL.
>
> Yours,
> Paul
>
>
> >
> >> + 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);
> >> +}
> >
Reviewed-by: Ramon Fried <rfried.dev at gmail.com>
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