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 static char input_buffer[512];
32 static int input_size; /* char count in input buffer */
33 static int input_offset; /* offset to valid chars in input buffer */
34 static int input_recursion;
35 static int output_recursion;
36 static int net_timeout;
37 static uchar nc_ether[6]; /* server enet address */
38 static IPaddr_t nc_ip; /* server ip */
39 static short nc_port; /* source/target port */
40 static const char *output_packet; /* used by first send udp */
41 static int output_packet_len;
43 static void nc_wait_arp_handler(uchar *pkt, unsigned dest,
44 IPaddr_t sip, unsigned src,
47 net_set_state(NETLOOP_SUCCESS); /* got arp reply - quit net loop */
50 static void nc_handler(uchar *pkt, unsigned dest, IPaddr_t sip, unsigned src,
54 net_set_state(NETLOOP_SUCCESS); /* got input - quit net loop */
57 static void nc_timeout(void)
59 net_set_state(NETLOOP_SUCCESS);
64 if (!output_packet_len || memcmp(nc_ether, NetEtherNullAddr, 6)) {
65 /* going to check for input packet */
66 net_set_udp_handler(nc_handler);
67 NetSetTimeout(net_timeout, nc_timeout);
69 /* send arp request */
71 net_set_arp_handler(nc_wait_arp_handler);
72 pkt = (uchar *)NetTxPacket + NetEthHdrSize() + IP_UDP_HDR_SIZE;
73 memcpy(pkt, output_packet, output_packet_len);
74 NetSendUDPPacket(nc_ether, nc_ip, nc_port, nc_port,
79 int nc_input_packet(uchar *pkt, unsigned dest, unsigned src, unsigned len)
83 if (dest != nc_port || !len)
84 return 0; /* not for us */
86 debug_cond(DEBUG_DEV_PKT, "input: \"%*.*s\"\n", len, len, pkt);
88 if (input_size == sizeof(input_buffer))
89 return 1; /* no space */
90 if (len > sizeof(input_buffer) - input_size)
91 len = sizeof(input_buffer) - input_size;
93 end = input_offset + input_size;
94 if (end > sizeof(input_buffer))
95 end -= sizeof(input_buffer);
98 if (end + len > sizeof(input_buffer)) {
99 chunk = sizeof(input_buffer) - end;
100 memcpy(input_buffer, pkt + chunk, len - chunk);
102 memcpy(input_buffer + end, pkt, chunk);
109 static void nc_send_packet(const char *buf, int len)
111 struct eth_device *eth;
117 debug_cond(DEBUG_DEV_PKT, "output: \"%*.*s\"\n", len, len, buf);
123 if (!memcmp(nc_ether, NetEtherNullAddr, 6)) {
124 if (eth->state == ETH_STATE_ACTIVE)
125 return; /* inside net loop */
127 output_packet_len = len;
128 NetLoop(NETCONS); /* wait for arp reply and send packet */
129 output_packet_len = 0;
133 if (eth->state != ETH_STATE_ACTIVE) {
134 if (eth_init(gd->bd) < 0)
138 pkt = (uchar *)NetTxPacket + NetEthHdrSize() + IP_UDP_HDR_SIZE;
139 memcpy(pkt, buf, len);
142 NetSendUDPPacket(ether, ip, nc_port, nc_port, len);
148 static int nc_start(void)
152 nc_port = 6666; /* default port */
154 if (getenv("ncip")) {
157 nc_ip = getenv_IPaddr("ncip");
159 return -1; /* ncip is 0.0.0.0 */
160 p = strchr(getenv("ncip"), ':');
162 nc_port = simple_strtoul(p + 1, NULL, 10);
164 nc_ip = ~0; /* ncip is not set */
166 our_ip = getenv_IPaddr("ipaddr");
167 netmask = getenv_IPaddr("netmask");
169 if (nc_ip == ~0 || /* 255.255.255.255 */
170 ((netmask & our_ip) == (netmask & nc_ip) && /* on the same net */
171 (netmask | nc_ip) == ~0)) /* broadcast to our net */
172 memset(nc_ether, 0xff, sizeof(nc_ether));
174 memset(nc_ether, 0, sizeof(nc_ether)); /* force arp request */
177 * Initialize the static IP settings and buffer pointers
178 * incase we call NetSendUDPPacket before NetLoop
185 static void nc_putc(char c)
187 if (output_recursion)
189 output_recursion = 1;
191 nc_send_packet(&c, 1);
193 output_recursion = 0;
196 static void nc_puts(const char *s)
200 if (output_recursion)
202 output_recursion = 1;
206 int send_len = min(len, 512);
207 nc_send_packet(s, send_len);
212 output_recursion = 0;
215 static int nc_getc(void)
221 net_timeout = 0; /* no timeout */
227 c = input_buffer[input_offset++];
229 if (input_offset >= sizeof(input_buffer))
230 input_offset -= sizeof(input_buffer);
236 static int nc_tstc(void)
238 struct eth_device *eth;
247 if (eth && eth->state == ETH_STATE_ACTIVE)
248 return 0; /* inside net loop */
253 NetLoop(NETCONS); /* kind of poll */
257 return input_size != 0;
260 int drv_nc_init(void)
262 struct stdio_dev dev;
265 memset(&dev, 0, sizeof(dev));
267 strcpy(dev.name, "nc");
268 dev.flags = DEV_FLAGS_OUTPUT | DEV_FLAGS_INPUT | DEV_FLAGS_SYSTEM;
269 dev.start = nc_start;
275 rc = stdio_register(&dev);
277 return (rc == 0) ? 1 : rc;