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 DECLARE_GLOBAL_DATA_PTR;
34 static char input_buffer[512];
35 static int input_size = 0; /* char count in input buffer */
36 static int input_offset = 0; /* offset to valid chars in input buffer */
37 static int input_recursion = 0;
38 static int output_recursion = 0;
39 static int net_timeout;
40 static uchar nc_ether[6]; /* server enet address */
41 static IPaddr_t nc_ip; /* server ip */
42 static short nc_port; /* source/target port */
43 static const char *output_packet; /* used by first send udp */
44 static int output_packet_len = 0;
46 static void nc_wait_arp_handler (uchar * pkt, unsigned dest, unsigned src,
49 NetState = NETLOOP_SUCCESS; /* got arp reply - quit net loop */
52 static void nc_handler (uchar * pkt, unsigned dest, unsigned src,
56 NetState = NETLOOP_SUCCESS; /* got input - quit net loop */
59 static void nc_timeout (void)
61 NetState = NETLOOP_SUCCESS;
66 if (!output_packet_len || memcmp (nc_ether, NetEtherNullAddr, 6)) {
67 /* going to check for input packet */
68 NetSetHandler (nc_handler);
69 NetSetTimeout (net_timeout, nc_timeout);
71 /* send arp request */
73 NetSetHandler (nc_wait_arp_handler);
74 pkt = (uchar *) NetTxPacket + NetEthHdrSize () + IP_HDR_SIZE;
75 memcpy (pkt, output_packet, output_packet_len);
76 NetSendUDPPacket (nc_ether, nc_ip, nc_port, nc_port, output_packet_len);
80 int nc_input_packet (uchar * pkt, unsigned dest, unsigned src, unsigned len)
84 if (dest != nc_port || !len)
85 return 0; /* not for us */
87 if (input_size == sizeof input_buffer)
88 return 1; /* no space */
89 if (len > sizeof input_buffer - input_size)
90 len = sizeof input_buffer - input_size;
92 end = input_offset + input_size;
93 if (end > sizeof input_buffer)
94 end -= sizeof input_buffer;
97 if (end + len > sizeof input_buffer) {
98 chunk = sizeof input_buffer - end;
99 memcpy(input_buffer, pkt + chunk, len - chunk);
101 memcpy (input_buffer + end, pkt, chunk);
108 static void nc_send_packet (const char *buf, int len)
110 struct eth_device *eth;
116 if ((eth = eth_get_dev ()) == NULL) {
120 if (!memcmp (nc_ether, NetEtherNullAddr, 6)) {
121 if (eth->state == ETH_STATE_ACTIVE)
122 return; /* inside net loop */
124 output_packet_len = len;
125 NetLoop (NETCONS); /* wait for arp reply and send packet */
126 output_packet_len = 0;
130 if (eth->state != ETH_STATE_ACTIVE) {
131 if (eth_init (gd->bd) < 0)
135 pkt = (uchar *) NetTxPacket + NetEthHdrSize () + IP_HDR_SIZE;
136 memcpy (pkt, buf, len);
139 NetSendUDPPacket (ether, ip, nc_port, nc_port, len);
149 nc_port = 6666; /* default port */
151 if (getenv ("ncip")) {
154 nc_ip = getenv_IPaddr ("ncip");
156 return -1; /* ncip is 0.0.0.0 */
157 if ((p = strchr (getenv ("ncip"), ':')) != NULL)
158 nc_port = simple_strtoul (p + 1, NULL, 10);
160 nc_ip = ~0; /* ncip is not set */
162 our_ip = getenv_IPaddr ("ipaddr");
163 netmask = getenv_IPaddr ("netmask");
165 if (nc_ip == ~0 || /* 255.255.255.255 */
166 ((netmask & our_ip) == (netmask & nc_ip) && /* on the same net */
167 (netmask | nc_ip) == ~0)) /* broadcast to our net */
168 memset (nc_ether, 0xff, sizeof nc_ether);
170 memset (nc_ether, 0, sizeof nc_ether); /* force arp request */
175 void nc_putc (char c)
177 if (output_recursion)
179 output_recursion = 1;
181 nc_send_packet (&c, 1);
183 output_recursion = 0;
186 void nc_puts (const char *s)
190 if (output_recursion)
192 output_recursion = 1;
194 if ((len = strlen (s)) > 512)
197 nc_send_packet (s, len);
199 output_recursion = 0;
208 net_timeout = 0; /* no timeout */
214 c = input_buffer[input_offset++];
216 if (input_offset >= sizeof input_buffer)
217 input_offset -= sizeof input_buffer;
225 struct eth_device *eth;
233 eth = eth_get_dev ();
234 if (eth && eth->state == ETH_STATE_ACTIVE)
235 return 0; /* inside net loop */
240 NetLoop (NETCONS); /* kind of poll */
244 return input_size != 0;
247 int drv_nc_init (void)
252 memset (&dev, 0, sizeof (dev));
254 strcpy (dev.name, "nc");
255 dev.flags = DEV_FLAGS_OUTPUT | DEV_FLAGS_INPUT | DEV_FLAGS_SYSTEM;
256 dev.start = nc_start;
262 rc = device_register (&dev);
264 return (rc == 0) ? 1 : rc;
267 #endif /* CONFIG_NETCONSOLE */