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-rw-r--r--drivers/net/netconsole.c267
1 files changed, 267 insertions, 0 deletions
diff --git a/drivers/net/netconsole.c b/drivers/net/netconsole.c
new file mode 100644
index 0000000..69089f9
--- /dev/null
+++ b/drivers/net/netconsole.c
@@ -0,0 +1,267 @@
+/*
+ * (C) Copyright 2004
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+
+#ifdef CONFIG_NETCONSOLE
+
+#include <command.h>
+#include <devices.h>
+#include <net.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+static char input_buffer[512];
+static int input_size = 0; /* char count in input buffer */
+static int input_offset = 0; /* offset to valid chars in input buffer */
+static int input_recursion = 0;
+static int output_recursion = 0;
+static int net_timeout;
+static uchar nc_ether[6]; /* server enet address */
+static IPaddr_t nc_ip; /* server ip */
+static short nc_port; /* source/target port */
+static const char *output_packet; /* used by first send udp */
+static int output_packet_len = 0;
+
+static void nc_wait_arp_handler (uchar * pkt, unsigned dest, unsigned src,
+ unsigned len)
+{
+ NetState = NETLOOP_SUCCESS; /* got arp reply - quit net loop */
+}
+
+static void nc_handler (uchar * pkt, unsigned dest, unsigned src,
+ unsigned len)
+{
+ if (input_size)
+ NetState = NETLOOP_SUCCESS; /* got input - quit net loop */
+}
+
+static void nc_timeout (void)
+{
+ NetState = NETLOOP_SUCCESS;
+}
+
+void NcStart (void)
+{
+ if (!output_packet_len || memcmp (nc_ether, NetEtherNullAddr, 6)) {
+ /* going to check for input packet */
+ NetSetHandler (nc_handler);
+ NetSetTimeout (net_timeout, nc_timeout);
+ } else {
+ /* send arp request */
+ uchar *pkt;
+ NetSetHandler (nc_wait_arp_handler);
+ pkt = (uchar *) NetTxPacket + NetEthHdrSize () + IP_HDR_SIZE;
+ memcpy (pkt, output_packet, output_packet_len);
+ NetSendUDPPacket (nc_ether, nc_ip, nc_port, nc_port, output_packet_len);
+ }
+}
+
+int nc_input_packet (uchar * pkt, unsigned dest, unsigned src, unsigned len)
+{
+ int end, chunk;
+
+ if (dest != nc_port || !len)
+ return 0; /* not for us */
+
+ if (input_size == sizeof input_buffer)
+ return 1; /* no space */
+ if (len > sizeof input_buffer - input_size)
+ len = sizeof input_buffer - input_size;
+
+ end = input_offset + input_size;
+ if (end > sizeof input_buffer)
+ end -= sizeof input_buffer;
+
+ chunk = len;
+ if (end + len > sizeof input_buffer) {
+ chunk = sizeof input_buffer - end;
+ memcpy(input_buffer, pkt + chunk, len - chunk);
+ }
+ memcpy (input_buffer + end, pkt, chunk);
+
+ input_size += len;
+
+ return 1;
+}
+
+static void nc_send_packet (const char *buf, int len)
+{
+ struct eth_device *eth;
+ int inited = 0;
+ uchar *pkt;
+ uchar *ether;
+ IPaddr_t ip;
+
+ if ((eth = eth_get_dev ()) == NULL) {
+ return;
+ }
+
+ if (!memcmp (nc_ether, NetEtherNullAddr, 6)) {
+ if (eth->state == ETH_STATE_ACTIVE)
+ return; /* inside net loop */
+ output_packet = buf;
+ output_packet_len = len;
+ NetLoop (NETCONS); /* wait for arp reply and send packet */
+ output_packet_len = 0;
+ return;
+ }
+
+ if (eth->state != ETH_STATE_ACTIVE) {
+ if (eth_init (gd->bd) < 0)
+ return;
+ inited = 1;
+ }
+ pkt = (uchar *) NetTxPacket + NetEthHdrSize () + IP_HDR_SIZE;
+ memcpy (pkt, buf, len);
+ ether = nc_ether;
+ ip = nc_ip;
+ NetSendUDPPacket (ether, ip, nc_port, nc_port, len);
+
+ if (inited)
+ eth_halt ();
+}
+
+int nc_start (void)
+{
+ int netmask, our_ip;
+
+ nc_port = 6666; /* default port */
+
+ if (getenv ("ncip")) {
+ char *p;
+
+ nc_ip = getenv_IPaddr ("ncip");
+ if (!nc_ip)
+ return -1; /* ncip is 0.0.0.0 */
+ if ((p = strchr (getenv ("ncip"), ':')) != NULL)
+ nc_port = simple_strtoul (p + 1, NULL, 10);
+ } else
+ nc_ip = ~0; /* ncip is not set */
+
+ our_ip = getenv_IPaddr ("ipaddr");
+ netmask = getenv_IPaddr ("netmask");
+
+ if (nc_ip == ~0 || /* 255.255.255.255 */
+ ((netmask & our_ip) == (netmask & nc_ip) && /* on the same net */
+ (netmask | nc_ip) == ~0)) /* broadcast to our net */
+ memset (nc_ether, 0xff, sizeof nc_ether);
+ else
+ memset (nc_ether, 0, sizeof nc_ether); /* force arp request */
+
+ return 0;
+}
+
+void nc_putc (char c)
+{
+ if (output_recursion)
+ return;
+ output_recursion = 1;
+
+ nc_send_packet (&c, 1);
+
+ output_recursion = 0;
+}
+
+void nc_puts (const char *s)
+{
+ int len;
+
+ if (output_recursion)
+ return;
+ output_recursion = 1;
+
+ if ((len = strlen (s)) > 512)
+ len = 512;
+
+ nc_send_packet (s, len);
+
+ output_recursion = 0;
+}
+
+int nc_getc (void)
+{
+ uchar c;
+
+ input_recursion = 1;
+
+ net_timeout = 0; /* no timeout */
+ while (!input_size)
+ NetLoop (NETCONS);
+
+ input_recursion = 0;
+
+ c = input_buffer[input_offset++];
+
+ if (input_offset >= sizeof input_buffer)
+ input_offset -= sizeof input_buffer;
+ input_size--;
+
+ return c;
+}
+
+int nc_tstc (void)
+{
+ struct eth_device *eth;
+
+ if (input_recursion)
+ return 0;
+
+ if (input_size)
+ return 1;
+
+ eth = eth_get_dev ();
+ if (eth && eth->state == ETH_STATE_ACTIVE)
+ return 0; /* inside net loop */
+
+ input_recursion = 1;
+
+ net_timeout = 1;
+ NetLoop (NETCONS); /* kind of poll */
+
+ input_recursion = 0;
+
+ return input_size != 0;
+}
+
+int drv_nc_init (void)
+{
+ device_t dev;
+ int rc;
+
+ memset (&dev, 0, sizeof (dev));
+
+ strcpy (dev.name, "nc");
+ dev.flags = DEV_FLAGS_OUTPUT | DEV_FLAGS_INPUT | DEV_FLAGS_SYSTEM;
+ dev.start = nc_start;
+ dev.putc = nc_putc;
+ dev.puts = nc_puts;
+ dev.getc = nc_getc;
+ dev.tstc = nc_tstc;
+
+ rc = device_register (&dev);
+
+ return (rc == 0) ? 1 : rc;
+}
+
+#endif /* CONFIG_NETCONSOLE */