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 * Start with a default last protocol.
49 * We are only interested in NETCONS or not.
51 enum proto_t net_loop_last_protocol = BOOTP;
53 static void nc_wait_arp_handler(uchar *pkt, unsigned dest,
54 IPaddr_t sip, unsigned src,
57 net_set_state(NETLOOP_SUCCESS); /* got arp reply - quit net loop */
60 static void nc_handler(uchar *pkt, unsigned dest, IPaddr_t sip, unsigned src,
64 net_set_state(NETLOOP_SUCCESS); /* got input - quit net loop */
67 static void nc_timeout(void)
69 net_set_state(NETLOOP_SUCCESS);
72 static int is_broadcast(IPaddr_t ip)
74 static IPaddr_t netmask;
75 static IPaddr_t our_ip;
76 static int env_changed_id;
77 int env_id = get_env_id();
79 /* update only when the environment has changed */
80 if (env_changed_id != env_id) {
81 netmask = getenv_IPaddr("netmask");
82 our_ip = getenv_IPaddr("ipaddr");
84 env_changed_id = env_id;
87 return (ip == ~0 || /* 255.255.255.255 */
88 ((netmask & our_ip) == (netmask & ip) && /* on the same net */
89 (netmask | ip) == ~0)); /* broadcast to our net */
92 static int refresh_settings_from_env(void)
95 static int env_changed_id;
96 int env_id = get_env_id();
98 /* update only when the environment has changed */
99 if (env_changed_id != env_id) {
100 if (getenv("ncip")) {
101 nc_ip = getenv_IPaddr("ncip");
103 return -1; /* ncip is 0.0.0.0 */
104 p = strchr(getenv("ncip"), ':');
106 nc_out_port = simple_strtoul(p + 1, NULL, 10);
107 nc_in_port = nc_out_port;
110 nc_ip = ~0; /* ncip is not set, so broadcast */
112 p = getenv("ncoutport");
114 nc_out_port = simple_strtoul(p, NULL, 10);
115 p = getenv("ncinport");
117 nc_in_port = simple_strtoul(p, NULL, 10);
119 if (is_broadcast(nc_ip))
120 /* broadcast MAC address */
121 memset(nc_ether, 0xff, sizeof(nc_ether));
123 /* force arp request */
124 memset(nc_ether, 0, sizeof(nc_ether));
130 * Called from NetLoop in net/net.c before each packet
134 refresh_settings_from_env();
135 if (!output_packet_len || memcmp(nc_ether, NetEtherNullAddr, 6)) {
136 /* going to check for input packet */
137 net_set_udp_handler(nc_handler);
138 NetSetTimeout(net_timeout, nc_timeout);
140 /* send arp request */
142 net_set_arp_handler(nc_wait_arp_handler);
143 pkt = (uchar *)NetTxPacket + NetEthHdrSize() + IP_UDP_HDR_SIZE;
144 memcpy(pkt, output_packet, output_packet_len);
145 NetSendUDPPacket(nc_ether, nc_ip, nc_out_port, nc_in_port,
150 int nc_input_packet(uchar *pkt, unsigned dest, unsigned src, unsigned len)
154 if (dest != nc_in_port || !len)
155 return 0; /* not for us */
157 debug_cond(DEBUG_DEV_PKT, "input: \"%*.*s\"\n", len, len, pkt);
159 if (input_size == sizeof(input_buffer))
160 return 1; /* no space */
161 if (len > sizeof(input_buffer) - input_size)
162 len = sizeof(input_buffer) - input_size;
164 end = input_offset + input_size;
165 if (end > sizeof(input_buffer))
166 end -= sizeof(input_buffer);
169 if (end + len > sizeof(input_buffer)) {
170 chunk = sizeof(input_buffer) - end;
171 memcpy(input_buffer, pkt + chunk, len - chunk);
173 memcpy(input_buffer + end, pkt, chunk);
180 static void nc_send_packet(const char *buf, int len)
182 struct eth_device *eth;
188 debug_cond(DEBUG_DEV_PKT, "output: \"%*.*s\"\n", len, len, buf);
194 if (!memcmp(nc_ether, NetEtherNullAddr, 6)) {
195 if (eth->state == ETH_STATE_ACTIVE)
196 return; /* inside net loop */
198 output_packet_len = len;
199 NetLoop(NETCONS); /* wait for arp reply and send packet */
200 output_packet_len = 0;
204 if (eth->state != ETH_STATE_ACTIVE) {
205 if (eth_is_on_demand_init()) {
206 if (eth_init(gd->bd) < 0)
208 eth_set_last_protocol(NETCONS);
210 eth_init_state_only(gd->bd);
214 pkt = (uchar *)NetTxPacket + NetEthHdrSize() + IP_UDP_HDR_SIZE;
215 memcpy(pkt, buf, len);
218 NetSendUDPPacket(ether, ip, nc_out_port, nc_in_port, len);
221 if (eth_is_on_demand_init())
224 eth_halt_state_only();
228 static int nc_start(void)
232 nc_out_port = 6666; /* default port */
233 nc_in_port = nc_out_port;
235 retval = refresh_settings_from_env();
240 * Initialize the static IP settings and buffer pointers
241 * incase we call NetSendUDPPacket before NetLoop
248 static void nc_putc(char c)
250 if (output_recursion)
252 output_recursion = 1;
254 nc_send_packet(&c, 1);
256 output_recursion = 0;
259 static void nc_puts(const char *s)
263 if (output_recursion)
265 output_recursion = 1;
269 int send_len = min(len, sizeof(input_buffer));
270 nc_send_packet(s, send_len);
275 output_recursion = 0;
278 static int nc_getc(void)
284 net_timeout = 0; /* no timeout */
290 c = input_buffer[input_offset++];
292 if (input_offset >= sizeof(input_buffer))
293 input_offset -= sizeof(input_buffer);
299 static int nc_tstc(void)
301 struct eth_device *eth;
310 if (eth && eth->state == ETH_STATE_ACTIVE)
311 return 0; /* inside net loop */
316 NetLoop(NETCONS); /* kind of poll */
320 return input_size != 0;
323 int drv_nc_init(void)
325 struct stdio_dev dev;
328 memset(&dev, 0, sizeof(dev));
330 strcpy(dev.name, "nc");
331 dev.flags = DEV_FLAGS_OUTPUT | DEV_FLAGS_INPUT | DEV_FLAGS_SYSTEM;
332 dev.start = nc_start;
338 rc = stdio_register(&dev);
340 return (rc == 0) ? 1 : rc;