mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-08-17 23:48:52 +09:00
268 lines
5.7 KiB
C
268 lines
5.7 KiB
C
/*
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* (C) Copyright 2004
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include <common.h>
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#ifdef CONFIG_NETCONSOLE
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#include <command.h>
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#include <devices.h>
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#include <net.h>
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DECLARE_GLOBAL_DATA_PTR;
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static char input_buffer[512];
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static int input_size = 0; /* char count in input buffer */
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static int input_offset = 0; /* offset to valid chars in input buffer */
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static int input_recursion = 0;
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static int output_recursion = 0;
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static int net_timeout;
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static uchar nc_ether[6]; /* server enet address */
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static IPaddr_t nc_ip; /* server ip */
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static short nc_port; /* source/target port */
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static const char *output_packet; /* used by first send udp */
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static int output_packet_len = 0;
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static void nc_wait_arp_handler (uchar * pkt, unsigned dest, unsigned src,
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unsigned len)
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{
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NetState = NETLOOP_SUCCESS; /* got arp reply - quit net loop */
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}
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static void nc_handler (uchar * pkt, unsigned dest, unsigned src,
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unsigned len)
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{
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if (input_size)
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NetState = NETLOOP_SUCCESS; /* got input - quit net loop */
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}
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static void nc_timeout (void)
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{
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NetState = NETLOOP_SUCCESS;
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}
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void NcStart (void)
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{
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if (!output_packet_len || memcmp (nc_ether, NetEtherNullAddr, 6)) {
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/* going to check for input packet */
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NetSetHandler (nc_handler);
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NetSetTimeout (net_timeout, nc_timeout);
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} else {
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/* send arp request */
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uchar *pkt;
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NetSetHandler (nc_wait_arp_handler);
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pkt = (uchar *) NetTxPacket + NetEthHdrSize () + IP_HDR_SIZE;
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memcpy (pkt, output_packet, output_packet_len);
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NetSendUDPPacket (nc_ether, nc_ip, nc_port, nc_port, output_packet_len);
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}
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}
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int nc_input_packet (uchar * pkt, unsigned dest, unsigned src, unsigned len)
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{
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int end, chunk;
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if (dest != nc_port || !len)
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return 0; /* not for us */
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if (input_size == sizeof input_buffer)
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return 1; /* no space */
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if (len > sizeof input_buffer - input_size)
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len = sizeof input_buffer - input_size;
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end = input_offset + input_size;
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if (end > sizeof input_buffer)
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end -= sizeof input_buffer;
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chunk = len;
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if (end + len > sizeof input_buffer) {
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chunk = sizeof input_buffer - end;
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memcpy(input_buffer, pkt + chunk, len - chunk);
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}
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memcpy (input_buffer + end, pkt, chunk);
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input_size += len;
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return 1;
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}
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static void nc_send_packet (const char *buf, int len)
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{
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struct eth_device *eth;
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int inited = 0;
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uchar *pkt;
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uchar *ether;
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IPaddr_t ip;
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if ((eth = eth_get_dev ()) == NULL) {
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return;
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}
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if (!memcmp (nc_ether, NetEtherNullAddr, 6)) {
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if (eth->state == ETH_STATE_ACTIVE)
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return; /* inside net loop */
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output_packet = buf;
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output_packet_len = len;
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NetLoop (NETCONS); /* wait for arp reply and send packet */
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output_packet_len = 0;
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return;
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}
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if (eth->state != ETH_STATE_ACTIVE) {
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if (eth_init (gd->bd) < 0)
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return;
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inited = 1;
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}
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pkt = (uchar *) NetTxPacket + NetEthHdrSize () + IP_HDR_SIZE;
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memcpy (pkt, buf, len);
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ether = nc_ether;
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ip = nc_ip;
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NetSendUDPPacket (ether, ip, nc_port, nc_port, len);
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if (inited)
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eth_halt ();
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}
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int nc_start (void)
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{
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int netmask, our_ip;
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nc_port = 6666; /* default port */
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if (getenv ("ncip")) {
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char *p;
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nc_ip = getenv_IPaddr ("ncip");
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if (!nc_ip)
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return -1; /* ncip is 0.0.0.0 */
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if ((p = strchr (getenv ("ncip"), ':')) != NULL)
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nc_port = simple_strtoul (p + 1, NULL, 10);
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} else
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nc_ip = ~0; /* ncip is not set */
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our_ip = getenv_IPaddr ("ipaddr");
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netmask = getenv_IPaddr ("netmask");
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if (nc_ip == ~0 || /* 255.255.255.255 */
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((netmask & our_ip) == (netmask & nc_ip) && /* on the same net */
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(netmask | nc_ip) == ~0)) /* broadcast to our net */
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memset (nc_ether, 0xff, sizeof nc_ether);
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else
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memset (nc_ether, 0, sizeof nc_ether); /* force arp request */
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return 0;
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}
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void nc_putc (char c)
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{
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if (output_recursion)
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return;
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output_recursion = 1;
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nc_send_packet (&c, 1);
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output_recursion = 0;
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}
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void nc_puts (const char *s)
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{
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int len;
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if (output_recursion)
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return;
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output_recursion = 1;
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if ((len = strlen (s)) > 512)
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len = 512;
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nc_send_packet (s, len);
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output_recursion = 0;
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}
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int nc_getc (void)
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{
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uchar c;
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input_recursion = 1;
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net_timeout = 0; /* no timeout */
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while (!input_size)
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NetLoop (NETCONS);
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input_recursion = 0;
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c = input_buffer[input_offset++];
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if (input_offset >= sizeof input_buffer)
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input_offset -= sizeof input_buffer;
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input_size--;
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return c;
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}
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int nc_tstc (void)
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{
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struct eth_device *eth;
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if (input_recursion)
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return 0;
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if (input_size)
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return 1;
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eth = eth_get_dev ();
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if (eth && eth->state == ETH_STATE_ACTIVE)
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return 0; /* inside net loop */
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input_recursion = 1;
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net_timeout = 1;
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NetLoop (NETCONS); /* kind of poll */
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input_recursion = 0;
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return input_size != 0;
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}
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int drv_nc_init (void)
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{
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device_t dev;
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int rc;
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memset (&dev, 0, sizeof (dev));
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strcpy (dev.name, "nc");
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dev.flags = DEV_FLAGS_OUTPUT | DEV_FLAGS_INPUT | DEV_FLAGS_SYSTEM;
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dev.start = nc_start;
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dev.putc = nc_putc;
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dev.puts = nc_puts;
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dev.getc = nc_getc;
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dev.tstc = nc_tstc;
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rc = device_register (&dev);
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return (rc == 0) ? 1 : rc;
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}
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#endif /* CONFIG_NETCONSOLE */
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