xref: /openbmc/u-boot/cmd/net.c (revision 6f565821) 
1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * (C) Copyright 2000
4  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5  */
6 
7 /*
8  * Boot support
9  */
10 #include <common.h>
11 #include <command.h>
12 #include <net.h>
13 
14 static int netboot_common(enum proto_t, cmd_tbl_t *, int, char * const []);
15 
16 #ifdef CONFIG_CMD_BOOTP
17 static int do_bootp(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
18 {
19 	return netboot_common(BOOTP, cmdtp, argc, argv);
20 }
21 
22 U_BOOT_CMD(
23 	bootp,	3,	1,	do_bootp,
24 	"boot image via network using BOOTP/TFTP protocol",
25 	"[loadAddress] [[hostIPaddr:]bootfilename]"
26 );
27 #endif
28 
29 #ifdef CONFIG_CMD_TFTPBOOT
30 int do_tftpb(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
31 {
32 	int ret;
33 
34 	bootstage_mark_name(BOOTSTAGE_KERNELREAD_START, "tftp_start");
35 	ret = netboot_common(TFTPGET, cmdtp, argc, argv);
36 	bootstage_mark_name(BOOTSTAGE_KERNELREAD_STOP, "tftp_done");
37 	return ret;
38 }
39 
40 U_BOOT_CMD(
41 	tftpboot,	3,	1,	do_tftpb,
42 	"boot image via network using TFTP protocol",
43 	"[loadAddress] [[hostIPaddr:]bootfilename]"
44 );
45 #endif
46 
47 #ifdef CONFIG_CMD_TFTPPUT
48 static int do_tftpput(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
49 {
50 	return netboot_common(TFTPPUT, cmdtp, argc, argv);
51 }
52 
53 U_BOOT_CMD(
54 	tftpput,	4,	1,	do_tftpput,
55 	"TFTP put command, for uploading files to a server",
56 	"Address Size [[hostIPaddr:]filename]"
57 );
58 #endif
59 
60 #ifdef CONFIG_CMD_TFTPSRV
61 static int do_tftpsrv(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
62 {
63 	return netboot_common(TFTPSRV, cmdtp, argc, argv);
64 }
65 
66 U_BOOT_CMD(
67 	tftpsrv,	2,	1,	do_tftpsrv,
68 	"act as a TFTP server and boot the first received file",
69 	"[loadAddress]\n"
70 	"Listen for an incoming TFTP transfer, receive a file and boot it.\n"
71 	"The transfer is aborted if a transfer has not been started after\n"
72 	"about 50 seconds or if Ctrl-C is pressed."
73 );
74 #endif
75 
76 
77 #ifdef CONFIG_CMD_RARP
78 int do_rarpb(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
79 {
80 	return netboot_common(RARP, cmdtp, argc, argv);
81 }
82 
83 U_BOOT_CMD(
84 	rarpboot,	3,	1,	do_rarpb,
85 	"boot image via network using RARP/TFTP protocol",
86 	"[loadAddress] [[hostIPaddr:]bootfilename]"
87 );
88 #endif
89 
90 #if defined(CONFIG_CMD_DHCP)
91 static int do_dhcp(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
92 {
93 	return netboot_common(DHCP, cmdtp, argc, argv);
94 }
95 
96 U_BOOT_CMD(
97 	dhcp,	3,	1,	do_dhcp,
98 	"boot image via network using DHCP/TFTP protocol",
99 	"[loadAddress] [[hostIPaddr:]bootfilename]"
100 );
101 #endif
102 
103 #if defined(CONFIG_CMD_NFS)
104 static int do_nfs(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
105 {
106 	return netboot_common(NFS, cmdtp, argc, argv);
107 }
108 
109 U_BOOT_CMD(
110 	nfs,	3,	1,	do_nfs,
111 	"boot image via network using NFS protocol",
112 	"[loadAddress] [[hostIPaddr:]bootfilename]"
113 );
114 #endif
115 
116 static void netboot_update_env(void)
117 {
118 	char tmp[22];
119 
120 	if (net_gateway.s_addr) {
121 		ip_to_string(net_gateway, tmp);
122 		env_set("gatewayip", tmp);
123 	}
124 
125 	if (net_netmask.s_addr) {
126 		ip_to_string(net_netmask, tmp);
127 		env_set("netmask", tmp);
128 	}
129 
130 	if (net_hostname[0])
131 		env_set("hostname", net_hostname);
132 
133 	if (net_root_path[0])
134 		env_set("rootpath", net_root_path);
135 
136 	if (net_ip.s_addr) {
137 		ip_to_string(net_ip, tmp);
138 		env_set("ipaddr", tmp);
139 	}
140 #if !defined(CONFIG_BOOTP_SERVERIP)
141 	/*
142 	 * Only attempt to change serverip if net/bootp.c:store_net_params()
143 	 * could have set it
144 	 */
145 	if (net_server_ip.s_addr) {
146 		ip_to_string(net_server_ip, tmp);
147 		env_set("serverip", tmp);
148 	}
149 #endif
150 	if (net_dns_server.s_addr) {
151 		ip_to_string(net_dns_server, tmp);
152 		env_set("dnsip", tmp);
153 	}
154 #if defined(CONFIG_BOOTP_DNS2)
155 	if (net_dns_server2.s_addr) {
156 		ip_to_string(net_dns_server2, tmp);
157 		env_set("dnsip2", tmp);
158 	}
159 #endif
160 	if (net_nis_domain[0])
161 		env_set("domain", net_nis_domain);
162 
163 #if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_TIMEOFFSET)
164 	if (net_ntp_time_offset) {
165 		sprintf(tmp, "%d", net_ntp_time_offset);
166 		env_set("timeoffset", tmp);
167 	}
168 #endif
169 #if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_NTPSERVER)
170 	if (net_ntp_server.s_addr) {
171 		ip_to_string(net_ntp_server, tmp);
172 		env_set("ntpserverip", tmp);
173 	}
174 #endif
175 }
176 
177 static int netboot_common(enum proto_t proto, cmd_tbl_t *cmdtp, int argc,
178 		char * const argv[])
179 {
180 	char *s;
181 	char *end;
182 	int   rcode = 0;
183 	int   size;
184 	ulong addr;
185 
186 	net_boot_file_name_explicit = false;
187 
188 	/* pre-set load_addr */
189 	s = env_get("loadaddr");
190 	if (s != NULL)
191 		load_addr = simple_strtoul(s, NULL, 16);
192 
193 	switch (argc) {
194 	case 1:
195 		/* refresh bootfile name from env */
196 		copy_filename(net_boot_file_name, env_get("bootfile"),
197 			      sizeof(net_boot_file_name));
198 		break;
199 
200 	case 2:	/*
201 		 * Only one arg - accept two forms:
202 		 * Just load address, or just boot file name. The latter
203 		 * form must be written in a format which can not be
204 		 * mis-interpreted as a valid number.
205 		 */
206 		addr = simple_strtoul(argv[1], &end, 16);
207 		if (end == (argv[1] + strlen(argv[1]))) {
208 			load_addr = addr;
209 			/* refresh bootfile name from env */
210 			copy_filename(net_boot_file_name, env_get("bootfile"),
211 				      sizeof(net_boot_file_name));
212 		} else {
213 			net_boot_file_name_explicit = true;
214 			copy_filename(net_boot_file_name, argv[1],
215 				      sizeof(net_boot_file_name));
216 		}
217 		break;
218 
219 	case 3:
220 		load_addr = simple_strtoul(argv[1], NULL, 16);
221 		net_boot_file_name_explicit = true;
222 		copy_filename(net_boot_file_name, argv[2],
223 			      sizeof(net_boot_file_name));
224 
225 		break;
226 
227 #ifdef CONFIG_CMD_TFTPPUT
228 	case 4:
229 		if (strict_strtoul(argv[1], 16, &save_addr) < 0 ||
230 		    strict_strtoul(argv[2], 16, &save_size) < 0) {
231 			printf("Invalid address/size\n");
232 			return CMD_RET_USAGE;
233 		}
234 		net_boot_file_name_explicit = true;
235 		copy_filename(net_boot_file_name, argv[3],
236 			      sizeof(net_boot_file_name));
237 		break;
238 #endif
239 	default:
240 		bootstage_error(BOOTSTAGE_ID_NET_START);
241 		return CMD_RET_USAGE;
242 	}
243 	bootstage_mark(BOOTSTAGE_ID_NET_START);
244 
245 	size = net_loop(proto);
246 	if (size < 0) {
247 		bootstage_error(BOOTSTAGE_ID_NET_NETLOOP_OK);
248 		return CMD_RET_FAILURE;
249 	}
250 	bootstage_mark(BOOTSTAGE_ID_NET_NETLOOP_OK);
251 
252 	/* net_loop ok, update environment */
253 	netboot_update_env();
254 
255 	/* done if no file was loaded (no errors though) */
256 	if (size == 0) {
257 		bootstage_error(BOOTSTAGE_ID_NET_LOADED);
258 		return CMD_RET_SUCCESS;
259 	}
260 
261 	bootstage_mark(BOOTSTAGE_ID_NET_LOADED);
262 
263 	rcode = bootm_maybe_autostart(cmdtp, argv[0]);
264 
265 	if (rcode == CMD_RET_SUCCESS)
266 		bootstage_mark(BOOTSTAGE_ID_NET_DONE);
267 	else
268 		bootstage_error(BOOTSTAGE_ID_NET_DONE_ERR);
269 	return rcode;
270 }
271 
272 #if defined(CONFIG_CMD_PING)
273 static int do_ping(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
274 {
275 	if (argc < 2)
276 		return CMD_RET_USAGE;
277 
278 	net_ping_ip = string_to_ip(argv[1]);
279 	if (net_ping_ip.s_addr == 0)
280 		return CMD_RET_USAGE;
281 
282 	if (net_loop(PING) < 0) {
283 		printf("ping failed; host %s is not alive\n", argv[1]);
284 		return CMD_RET_FAILURE;
285 	}
286 
287 	printf("host %s is alive\n", argv[1]);
288 
289 	return CMD_RET_SUCCESS;
290 }
291 
292 U_BOOT_CMD(
293 	ping,	2,	1,	do_ping,
294 	"send ICMP ECHO_REQUEST to network host",
295 	"pingAddress"
296 );
297 #endif
298 
299 #if defined(CONFIG_CMD_CDP)
300 
301 static void cdp_update_env(void)
302 {
303 	char tmp[16];
304 
305 	if (cdp_appliance_vlan != htons(-1)) {
306 		printf("CDP offered appliance VLAN %d\n",
307 		       ntohs(cdp_appliance_vlan));
308 		vlan_to_string(cdp_appliance_vlan, tmp);
309 		env_set("vlan", tmp);
310 		net_our_vlan = cdp_appliance_vlan;
311 	}
312 
313 	if (cdp_native_vlan != htons(-1)) {
314 		printf("CDP offered native VLAN %d\n", ntohs(cdp_native_vlan));
315 		vlan_to_string(cdp_native_vlan, tmp);
316 		env_set("nvlan", tmp);
317 		net_native_vlan = cdp_native_vlan;
318 	}
319 }
320 
321 int do_cdp(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
322 {
323 	int r;
324 
325 	r = net_loop(CDP);
326 	if (r < 0) {
327 		printf("cdp failed; perhaps not a CISCO switch?\n");
328 		return CMD_RET_FAILURE;
329 	}
330 
331 	cdp_update_env();
332 
333 	return CMD_RET_SUCCESS;
334 }
335 
336 U_BOOT_CMD(
337 	cdp,	1,	1,	do_cdp,
338 	"Perform CDP network configuration",
339 	"\n"
340 );
341 #endif
342 
343 #if defined(CONFIG_CMD_SNTP)
344 int do_sntp(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
345 {
346 	char *toff;
347 
348 	if (argc < 2) {
349 		net_ntp_server = env_get_ip("ntpserverip");
350 		if (net_ntp_server.s_addr == 0) {
351 			printf("ntpserverip not set\n");
352 			return CMD_RET_FAILURE;
353 		}
354 	} else {
355 		net_ntp_server = string_to_ip(argv[1]);
356 		if (net_ntp_server.s_addr == 0) {
357 			printf("Bad NTP server IP address\n");
358 			return CMD_RET_FAILURE;
359 		}
360 	}
361 
362 	toff = env_get("timeoffset");
363 	if (toff == NULL)
364 		net_ntp_time_offset = 0;
365 	else
366 		net_ntp_time_offset = simple_strtol(toff, NULL, 10);
367 
368 	if (net_loop(SNTP) < 0) {
369 		printf("SNTP failed: host %pI4 not responding\n",
370 		       &net_ntp_server);
371 		return CMD_RET_FAILURE;
372 	}
373 
374 	return CMD_RET_SUCCESS;
375 }
376 
377 U_BOOT_CMD(
378 	sntp,	2,	1,	do_sntp,
379 	"synchronize RTC via network",
380 	"[NTP server IP]\n"
381 );
382 #endif
383 
384 #if defined(CONFIG_CMD_DNS)
385 int do_dns(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
386 {
387 	if (argc == 1)
388 		return CMD_RET_USAGE;
389 
390 	/*
391 	 * We should check for a valid hostname:
392 	 * - Each label must be between 1 and 63 characters long
393 	 * - the entire hostname has a maximum of 255 characters
394 	 * - only the ASCII letters 'a' through 'z' (case-insensitive),
395 	 *   the digits '0' through '9', and the hyphen
396 	 * - cannot begin or end with a hyphen
397 	 * - no other symbols, punctuation characters, or blank spaces are
398 	 *   permitted
399 	 * but hey - this is a minimalist implmentation, so only check length
400 	 * and let the name server deal with things.
401 	 */
402 	if (strlen(argv[1]) >= 255) {
403 		printf("dns error: hostname too long\n");
404 		return CMD_RET_FAILURE;
405 	}
406 
407 	net_dns_resolve = argv[1];
408 
409 	if (argc == 3)
410 		net_dns_env_var = argv[2];
411 	else
412 		net_dns_env_var = NULL;
413 
414 	if (net_loop(DNS) < 0) {
415 		printf("dns lookup of %s failed, check setup\n", argv[1]);
416 		return CMD_RET_FAILURE;
417 	}
418 
419 	return CMD_RET_SUCCESS;
420 }
421 
422 U_BOOT_CMD(
423 	dns,	3,	1,	do_dns,
424 	"lookup the IP of a hostname",
425 	"hostname [envvar]"
426 );
427 
428 #endif	/* CONFIG_CMD_DNS */
429 
430 #if defined(CONFIG_CMD_LINK_LOCAL)
431 static int do_link_local(cmd_tbl_t *cmdtp, int flag, int argc,
432 			char * const argv[])
433 {
434 	char tmp[22];
435 
436 	if (net_loop(LINKLOCAL) < 0)
437 		return CMD_RET_FAILURE;
438 
439 	net_gateway.s_addr = 0;
440 	ip_to_string(net_gateway, tmp);
441 	env_set("gatewayip", tmp);
442 
443 	ip_to_string(net_netmask, tmp);
444 	env_set("netmask", tmp);
445 
446 	ip_to_string(net_ip, tmp);
447 	env_set("ipaddr", tmp);
448 	env_set("llipaddr", tmp); /* store this for next time */
449 
450 	return CMD_RET_SUCCESS;
451 }
452 
453 U_BOOT_CMD(
454 	linklocal,	1,	1,	do_link_local,
455 	"acquire a network IP address using the link-local protocol",
456 	""
457 );
458 
459 #endif  /* CONFIG_CMD_LINK_LOCAL */
460