3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 * See file CREDITS for list of people who contributed to this
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
26 #ifdef CONFIG_NETCONSOLE
32 #ifndef CONFIG_NET_MULTI
33 #error define CONFIG_NET_MULTI to use netconsole
36 static char input_buffer[512];
37 static int input_size = 0; /* char count in input buffer */
38 static int input_offset = 0; /* offset to valid chars in input buffer */
39 static int input_recursion = 0;
40 static int output_recursion = 0;
41 static int net_timeout;
42 static uchar nc_ether[6]; /* server enet address */
43 static IPaddr_t nc_ip; /* server ip */
44 static short nc_port; /* source/target port */
45 static const char *output_packet; /* used by first send udp */
46 static int output_packet_len = 0;
48 static void nc_wait_arp_handler (uchar * pkt, unsigned dest, unsigned src,
51 NetState = NETLOOP_SUCCESS; /* got arp reply - quit net loop */
54 static void nc_handler (uchar * pkt, unsigned dest, unsigned src,
58 NetState = NETLOOP_SUCCESS; /* got input - quit net loop */
61 static void nc_timeout (void)
63 NetState = NETLOOP_SUCCESS;
68 if (!output_packet_len || memcmp (nc_ether, NetEtherNullAddr, 6)) {
69 /* going to check for input packet */
70 NetSetHandler (nc_handler);
71 NetSetTimeout (net_timeout, nc_timeout);
73 /* send arp request */
75 NetSetHandler (nc_wait_arp_handler);
76 pkt = (uchar *) NetTxPacket + NetEthHdrSize () + IP_HDR_SIZE;
77 memcpy (pkt, output_packet, output_packet_len);
78 NetSendUDPPacket (nc_ether, nc_ip, nc_port, nc_port, output_packet_len);
82 int nc_input_packet (uchar * pkt, unsigned dest, unsigned src, unsigned len)
86 if (dest != nc_port || !len)
87 return 0; /* not for us */
89 if (input_size == sizeof input_buffer)
90 return 1; /* no space */
91 if (len > sizeof input_buffer - input_size)
92 len = sizeof input_buffer - input_size;
94 end = input_offset + input_size;
95 if (end > sizeof input_buffer)
96 end -= sizeof input_buffer;
99 if (end + len > sizeof input_buffer) {
100 chunk = sizeof input_buffer - end;
101 memcpy(input_buffer, pkt + chunk, len - chunk);
103 memcpy (input_buffer + end, pkt, chunk);
110 static void nc_send_packet (const char *buf, int len)
112 DECLARE_GLOBAL_DATA_PTR;
114 struct eth_device *eth;
120 if ((eth = eth_get_dev ()) == NULL) {
124 if (!memcmp (nc_ether, NetEtherNullAddr, 6)) {
125 if (eth->state == ETH_STATE_ACTIVE)
126 return; /* inside net loop */
128 output_packet_len = len;
129 NetLoop (NETCONS); /* wait for arp reply and send packet */
130 output_packet_len = 0;
134 if (eth->state != ETH_STATE_ACTIVE) {
135 if (eth_init (gd->bd) < 0)
139 pkt = (uchar *) NetTxPacket + NetEthHdrSize () + IP_HDR_SIZE;
140 memcpy (pkt, buf, len);
143 NetSendUDPPacket (ether, ip, nc_port, nc_port, len);
153 nc_port = 6666; /* default port */
155 if (getenv ("ncip")) {
156 nc_ip = getenv_IPaddr ("ncip");
158 return -1; /* ncip is 0.0.0.0 */
159 char *p = strchr (getenv ("ncip"), ':');
161 nc_port = simple_strtoul (p + 1, NULL, 10);
163 nc_ip = ~0; /* ncip is not set */
165 our_ip = getenv_IPaddr ("ipaddr");
166 netmask = getenv_IPaddr ("netmask");
168 if (nc_ip == ~0 || /* 255.255.255.255 */
169 ((netmask & our_ip) == (netmask & nc_ip) && /* on the same net */
170 (netmask | nc_ip) == ~0)) /* broadcast to our net */
171 memset (nc_ether, 0xff, sizeof nc_ether);
173 memset (nc_ether, 0, sizeof nc_ether); /* force arp request */
178 void nc_putc (char c)
180 if (output_recursion)
182 output_recursion = 1;
184 nc_send_packet (&c, 1);
186 output_recursion = 0;
189 void nc_puts (const char *s)
191 if (output_recursion)
193 output_recursion = 1;
195 int len = strlen (s);
200 nc_send_packet (s, len);
202 output_recursion = 0;
209 net_timeout = 0; /* no timeout */
215 uchar c = input_buffer[input_offset];
217 if (input_offset >= sizeof input_buffer)
218 input_offset -= sizeof input_buffer;
226 struct eth_device *eth;
234 eth = eth_get_dev ();
235 if (eth && eth->state == ETH_STATE_ACTIVE)
236 return 0; /* inside net loop */
241 NetLoop (NETCONS); /* kind of poll */
245 return input_size != 0;
248 int drv_nc_init (void)
253 memset (&dev, 0, sizeof (dev));
255 strcpy (dev.name, "nc");
256 dev.flags = DEV_FLAGS_OUTPUT | DEV_FLAGS_INPUT | DEV_FLAGS_SYSTEM;
257 dev.start = nc_start;
263 rc = device_register (&dev);
265 return (rc == 0) ? 1 : rc;
268 #endif /* CONFIG_NETCONSOLE */