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 #include <stdio_dev.h>
29 DECLARE_GLOBAL_DATA_PTR;
31 #ifndef CONFIG_NETCONSOLE_BUFFER_SIZE
32 #define CONFIG_NETCONSOLE_BUFFER_SIZE 512
35 static char input_buffer[CONFIG_NETCONSOLE_BUFFER_SIZE];
36 static int input_size; /* char count in input buffer */
37 static int input_offset; /* offset to valid chars in input buffer */
38 static int input_recursion;
39 static int output_recursion;
40 static int net_timeout;
41 static uchar nc_ether[6]; /* server enet address */
42 static IPaddr_t nc_ip; /* server ip */
43 static short nc_out_port; /* target output port */
44 static short nc_in_port; /* source input port */
45 static const char *output_packet; /* used by first send udp */
46 static int output_packet_len;
48 static void nc_wait_arp_handler(uchar *pkt, unsigned dest,
49 IPaddr_t sip, unsigned src,
52 net_set_state(NETLOOP_SUCCESS); /* got arp reply - quit net loop */
55 static void nc_handler(uchar *pkt, unsigned dest, IPaddr_t sip, unsigned src,
59 net_set_state(NETLOOP_SUCCESS); /* got input - quit net loop */
62 static void nc_timeout(void)
64 net_set_state(NETLOOP_SUCCESS);
69 if (!output_packet_len || memcmp(nc_ether, NetEtherNullAddr, 6)) {
70 /* going to check for input packet */
71 net_set_udp_handler(nc_handler);
72 NetSetTimeout(net_timeout, nc_timeout);
74 /* send arp request */
76 net_set_arp_handler(nc_wait_arp_handler);
77 pkt = (uchar *)NetTxPacket + NetEthHdrSize() + IP_UDP_HDR_SIZE;
78 memcpy(pkt, output_packet, output_packet_len);
79 NetSendUDPPacket(nc_ether, nc_ip, nc_out_port, nc_in_port,
84 int nc_input_packet(uchar *pkt, unsigned dest, unsigned src, unsigned len)
88 if (dest != nc_in_port || !len)
89 return 0; /* not for us */
91 debug_cond(DEBUG_DEV_PKT, "input: \"%*.*s\"\n", len, len, pkt);
93 if (input_size == sizeof(input_buffer))
94 return 1; /* no space */
95 if (len > sizeof(input_buffer) - input_size)
96 len = sizeof(input_buffer) - input_size;
98 end = input_offset + input_size;
99 if (end > sizeof(input_buffer))
100 end -= sizeof(input_buffer);
103 if (end + len > sizeof(input_buffer)) {
104 chunk = sizeof(input_buffer) - end;
105 memcpy(input_buffer, pkt + chunk, len - chunk);
107 memcpy(input_buffer + end, pkt, chunk);
114 static void nc_send_packet(const char *buf, int len)
116 struct eth_device *eth;
122 debug_cond(DEBUG_DEV_PKT, "output: \"%*.*s\"\n", len, len, buf);
128 if (!memcmp(nc_ether, NetEtherNullAddr, 6)) {
129 if (eth->state == ETH_STATE_ACTIVE)
130 return; /* inside net loop */
132 output_packet_len = len;
133 NetLoop(NETCONS); /* wait for arp reply and send packet */
134 output_packet_len = 0;
138 if (eth->state != ETH_STATE_ACTIVE) {
139 if (eth_init(gd->bd) < 0)
143 pkt = (uchar *)NetTxPacket + NetEthHdrSize() + IP_UDP_HDR_SIZE;
144 memcpy(pkt, buf, len);
147 NetSendUDPPacket(ether, ip, nc_out_port, nc_in_port, len);
153 static int nc_start(void)
158 nc_out_port = 6666; /* default port */
159 nc_in_port = nc_out_port;
161 if (getenv("ncip")) {
163 nc_ip = getenv_IPaddr("ncip");
165 return -1; /* ncip is 0.0.0.0 */
166 p = strchr(getenv("ncip"), ':');
168 nc_out_port = simple_strtoul(p + 1, NULL, 10);
169 nc_in_port = nc_out_port;
172 nc_ip = ~0; /* ncip is not set, so broadcast */
174 p = getenv("ncoutport");
176 nc_out_port = simple_strtoul(p, NULL, 10);
177 p = getenv("ncinport");
179 nc_in_port = simple_strtoul(p, NULL, 10);
181 our_ip = getenv_IPaddr("ipaddr");
182 netmask = getenv_IPaddr("netmask");
184 if (nc_ip == ~0 || /* 255.255.255.255 */
185 ((netmask & our_ip) == (netmask & nc_ip) && /* on the same net */
186 (netmask | nc_ip) == ~0)) /* broadcast to our net */
187 memset(nc_ether, 0xff, sizeof(nc_ether));
189 memset(nc_ether, 0, sizeof(nc_ether)); /* force arp request */
192 * Initialize the static IP settings and buffer pointers
193 * incase we call NetSendUDPPacket before NetLoop
200 static void nc_putc(char c)
202 if (output_recursion)
204 output_recursion = 1;
206 nc_send_packet(&c, 1);
208 output_recursion = 0;
211 static void nc_puts(const char *s)
215 if (output_recursion)
217 output_recursion = 1;
221 int send_len = min(len, sizeof(input_buffer));
222 nc_send_packet(s, send_len);
227 output_recursion = 0;
230 static int nc_getc(void)
236 net_timeout = 0; /* no timeout */
242 c = input_buffer[input_offset++];
244 if (input_offset >= sizeof(input_buffer))
245 input_offset -= sizeof(input_buffer);
251 static int nc_tstc(void)
253 struct eth_device *eth;
262 if (eth && eth->state == ETH_STATE_ACTIVE)
263 return 0; /* inside net loop */
268 NetLoop(NETCONS); /* kind of poll */
272 return input_size != 0;
275 int drv_nc_init(void)
277 struct stdio_dev dev;
280 memset(&dev, 0, sizeof(dev));
282 strcpy(dev.name, "nc");
283 dev.flags = DEV_FLAGS_OUTPUT | DEV_FLAGS_INPUT | DEV_FLAGS_SYSTEM;
284 dev.start = nc_start;
290 rc = stdio_register(&dev);
292 return (rc == 0) ? 1 : rc;