[PATCH v20 2/4] net: Add wget application
Ying-Chun Liu (PaulLiu)
paul.liu at linaro.org
Wed Nov 9 03:26:31 CET 2022
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);
>> +}
>
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