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fe8c2806 WD |
1 | /* |
2 | * Copyright 1994, 1995, 2000 Neil Russell. | |
3 | * (See License) | |
4 | * Copyright 2000, 2001 DENX Software Engineering, Wolfgang Denk, wd@denx.de | |
5 | */ | |
6 | ||
7 | #include <common.h> | |
8 | #include <command.h> | |
9 | #include <net.h> | |
10 | #include "tftp.h" | |
11 | #include "bootp.h" | |
12 | ||
13 | #undef ET_DEBUG | |
14 | ||
15 | #if (CONFIG_COMMANDS & CFG_CMD_NET) | |
16 | ||
17 | #define WELL_KNOWN_PORT 69 /* Well known TFTP port # */ | |
18 | #define TIMEOUT 2 /* Seconds to timeout for a lost pkt */ | |
19 | #ifndef CONFIG_NET_RETRY_COUNT | |
20 | # define TIMEOUT_COUNT 10 /* # of timeouts before giving up */ | |
21 | #else | |
22 | # define TIMEOUT_COUNT (CONFIG_NET_RETRY_COUNT * 2) | |
23 | #endif | |
24 | /* (for checking the image size) */ | |
25 | #define HASHES_PER_LINE 65 /* Number of "loading" hashes per line */ | |
26 | ||
27 | /* | |
28 | * TFTP operations. | |
29 | */ | |
30 | #define TFTP_RRQ 1 | |
31 | #define TFTP_WRQ 2 | |
32 | #define TFTP_DATA 3 | |
33 | #define TFTP_ACK 4 | |
34 | #define TFTP_ERROR 5 | |
35 | ||
36 | ||
37 | static int TftpServerPort; /* The UDP port at their end */ | |
38 | static int TftpOurPort; /* The UDP port at our end */ | |
39 | static int TftpTimeoutCount; | |
40 | static unsigned TftpBlock; | |
41 | static unsigned TftpLastBlock; | |
42 | static int TftpState; | |
43 | #define STATE_RRQ 1 | |
44 | #define STATE_DATA 2 | |
45 | #define STATE_TOO_LARGE 3 | |
46 | #define STATE_BAD_MAGIC 4 | |
47 | ||
48 | #define DEFAULT_NAME_LEN (8 + 4 + 1) | |
49 | static char default_filename[DEFAULT_NAME_LEN]; | |
50 | static char *tftp_filename; | |
51 | ||
52 | #ifdef CFG_DIRECT_FLASH_TFTP | |
53 | extern flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; | |
54 | #endif | |
55 | ||
56 | static __inline__ void | |
57 | store_block (unsigned block, uchar * src, unsigned len) | |
58 | { | |
59 | ulong offset = block * 512, newsize = offset + len; | |
60 | #ifdef CFG_DIRECT_FLASH_TFTP | |
61 | int i, rc = 0; | |
62 | ||
63 | for (i=0; i<CFG_MAX_FLASH_BANKS; i++) { | |
64 | /* start address in flash? */ | |
65 | if (load_addr + offset >= flash_info[i].start[0]) { | |
66 | rc = 1; | |
67 | break; | |
68 | } | |
69 | } | |
70 | ||
71 | if (rc) { /* Flash is destination for this packet */ | |
72 | rc = flash_write ((uchar *)src, (ulong)(load_addr+offset), len); | |
73 | if (rc) { | |
74 | flash_perror (rc); | |
75 | NetState = NETLOOP_FAIL; | |
76 | return; | |
77 | } | |
78 | } | |
79 | else | |
80 | #endif /* CFG_DIRECT_FLASH_TFTP */ | |
81 | { | |
82 | (void)memcpy((void *)(load_addr + offset), src, len); | |
83 | } | |
84 | ||
85 | if (NetBootFileXferSize < newsize) | |
86 | NetBootFileXferSize = newsize; | |
87 | } | |
88 | ||
89 | static void TftpSend (void); | |
90 | static void TftpTimeout (void); | |
91 | ||
92 | /**********************************************************************/ | |
93 | ||
94 | static void | |
95 | TftpSend (void) | |
96 | { | |
97 | volatile uchar * pkt; | |
98 | volatile uchar * xp; | |
99 | int len = 0; | |
100 | ||
101 | /* | |
102 | * We will always be sending some sort of packet, so | |
103 | * cobble together the packet headers now. | |
104 | */ | |
105 | pkt = NetTxPacket + ETHER_HDR_SIZE + IP_HDR_SIZE; | |
106 | ||
107 | switch (TftpState) { | |
108 | ||
109 | case STATE_RRQ: | |
110 | xp = pkt; | |
111 | *((ushort *)pkt)++ = htons(TFTP_RRQ); | |
112 | strcpy ((char *)pkt, tftp_filename); | |
113 | pkt += strlen(tftp_filename) + 1; | |
114 | strcpy ((char *)pkt, "octet"); | |
115 | pkt += 5 /*strlen("octet")*/ + 1; | |
116 | len = pkt - xp; | |
117 | break; | |
118 | ||
119 | case STATE_DATA: | |
120 | xp = pkt; | |
121 | *((ushort *)pkt)++ = htons(TFTP_ACK); | |
122 | *((ushort *)pkt)++ = htons(TftpBlock); | |
123 | len = pkt - xp; | |
124 | break; | |
125 | ||
126 | case STATE_TOO_LARGE: | |
127 | xp = pkt; | |
128 | *((ushort *)pkt)++ = htons(TFTP_ERROR); | |
129 | *((ushort *)pkt)++ = htons(3); | |
130 | strcpy ((char *)pkt, "File too large"); | |
131 | pkt += 14 /*strlen("File too large")*/ + 1; | |
132 | len = pkt - xp; | |
133 | break; | |
134 | ||
135 | case STATE_BAD_MAGIC: | |
136 | xp = pkt; | |
137 | *((ushort *)pkt)++ = htons(TFTP_ERROR); | |
138 | *((ushort *)pkt)++ = htons(2); | |
139 | strcpy ((char *)pkt, "File has bad magic"); | |
140 | pkt += 18 /*strlen("File has bad magic")*/ + 1; | |
141 | len = pkt - xp; | |
142 | break; | |
143 | } | |
144 | ||
73a8b27c | 145 | NetSendUDPPacket(NetServerEther, NetServerIP, TftpServerPort, TftpOurPort, len); |
fe8c2806 WD |
146 | } |
147 | ||
148 | ||
149 | static void | |
150 | TftpHandler (uchar * pkt, unsigned dest, unsigned src, unsigned len) | |
151 | { | |
152 | ushort proto; | |
153 | ||
154 | if (dest != TftpOurPort) { | |
155 | return; | |
156 | } | |
157 | if (TftpState != STATE_RRQ && src != TftpServerPort) { | |
158 | return; | |
159 | } | |
160 | ||
161 | if (len < 2) { | |
162 | return; | |
163 | } | |
164 | len -= 2; | |
165 | /* warning: don't use increment (++) in ntohs() macros!! */ | |
166 | proto = *((ushort *)pkt)++; | |
167 | switch (ntohs(proto)) { | |
168 | ||
169 | case TFTP_RRQ: | |
170 | case TFTP_WRQ: | |
171 | case TFTP_ACK: | |
172 | break; | |
173 | default: | |
174 | break; | |
175 | ||
176 | case TFTP_DATA: | |
177 | if (len < 2) | |
178 | return; | |
179 | len -= 2; | |
180 | TftpBlock = ntohs(*(ushort *)pkt); | |
181 | if (((TftpBlock - 1) % 10) == 0) { | |
182 | putc ('#'); | |
183 | } else if ((TftpBlock % (10 * HASHES_PER_LINE)) == 0) { | |
184 | puts ("\n\t "); | |
185 | } | |
186 | ||
187 | if (TftpState == STATE_RRQ) { | |
188 | TftpState = STATE_DATA; | |
189 | TftpServerPort = src; | |
190 | TftpLastBlock = 0; | |
191 | ||
192 | if (TftpBlock != 1) { /* Assertion */ | |
193 | printf ("\nTFTP error: " | |
194 | "First block is not block 1 (%d)\n" | |
195 | "Starting again\n\n", | |
196 | TftpBlock); | |
197 | NetStartAgain (); | |
198 | break; | |
199 | } | |
200 | } | |
201 | ||
202 | if (TftpBlock == TftpLastBlock) { | |
203 | /* | |
204 | * Same block again; ignore it. | |
205 | */ | |
206 | break; | |
207 | } | |
208 | ||
209 | TftpLastBlock = TftpBlock; | |
210 | NetSetTimeout (TIMEOUT * CFG_HZ, TftpTimeout); | |
211 | ||
212 | store_block (TftpBlock - 1, pkt + 2, len); | |
213 | ||
214 | /* | |
215 | * Acknoledge the block just received, which will prompt | |
216 | * the server for the next one. | |
217 | */ | |
218 | TftpSend (); | |
219 | ||
220 | if (len < 512) { | |
221 | /* | |
222 | * We received the whole thing. Try to | |
223 | * run it. | |
224 | */ | |
225 | puts ("\ndone\n"); | |
226 | NetState = NETLOOP_SUCCESS; | |
227 | } | |
228 | break; | |
229 | ||
230 | case TFTP_ERROR: | |
231 | printf ("\nTFTP error: '%s' (%d)\n", | |
232 | pkt + 2, ntohs(*(ushort *)pkt)); | |
233 | puts ("Starting again\n\n"); | |
234 | NetStartAgain (); | |
235 | break; | |
236 | } | |
237 | } | |
238 | ||
239 | ||
240 | static void | |
241 | TftpTimeout (void) | |
242 | { | |
243 | if (++TftpTimeoutCount >= TIMEOUT_COUNT) { | |
244 | puts ("\nRetry count exceeded; starting again\n"); | |
245 | NetStartAgain (); | |
246 | } else { | |
247 | puts ("T "); | |
248 | NetSetTimeout (TIMEOUT * CFG_HZ, TftpTimeout); | |
249 | TftpSend (); | |
250 | } | |
251 | } | |
252 | ||
253 | ||
254 | void | |
255 | TftpStart (void) | |
256 | { | |
fe8c2806 WD |
257 | if (BootFile[0] == '\0') { |
258 | IPaddr_t OurIP = ntohl(NetOurIP); | |
259 | ||
260 | sprintf(default_filename, "%02lX%02lX%02lX%02lX.img", | |
261 | OurIP & 0xFF, | |
262 | (OurIP >> 8) & 0xFF, | |
263 | (OurIP >> 16) & 0xFF, | |
264 | (OurIP >> 24) & 0xFF ); | |
265 | tftp_filename = default_filename; | |
266 | ||
267 | printf ("*** Warning: no boot file name; using '%s'\n", | |
268 | tftp_filename); | |
269 | } else { | |
270 | tftp_filename = BootFile; | |
271 | } | |
272 | ||
273 | puts ("TFTP from server "); print_IPaddr (NetServerIP); | |
274 | puts ("; our IP address is "); print_IPaddr (NetOurIP); | |
275 | ||
276 | /* Check if we need to send across this subnet */ | |
277 | if (NetOurGatewayIP && NetOurSubnetMask) { | |
278 | IPaddr_t OurNet = NetOurIP & NetOurSubnetMask; | |
279 | IPaddr_t ServerNet = NetServerIP & NetOurSubnetMask; | |
280 | ||
281 | if (OurNet != ServerNet) { | |
282 | puts ("; sending through gateway "); | |
283 | print_IPaddr (NetOurGatewayIP) ; | |
284 | } | |
285 | } | |
286 | putc ('\n'); | |
287 | ||
288 | printf ("Filename '%s'.", tftp_filename); | |
289 | ||
290 | if (NetBootFileSize) { | |
291 | printf (" Size is 0x%x Bytes = ", NetBootFileSize<<9); | |
292 | print_size (NetBootFileSize<<9, ""); | |
293 | } | |
294 | ||
295 | putc ('\n'); | |
296 | ||
297 | printf ("Load address: 0x%lx\n", load_addr); | |
298 | ||
299 | puts ("Loading: *\b"); | |
300 | ||
301 | NetSetTimeout (TIMEOUT * CFG_HZ, TftpTimeout); | |
302 | NetSetHandler (TftpHandler); | |
303 | ||
304 | TftpServerPort = WELL_KNOWN_PORT; | |
305 | TftpTimeoutCount = 0; | |
306 | TftpState = STATE_RRQ; | |
307 | TftpOurPort = 1024 + (get_timer(0) % 3072); | |
308 | ||
73a8b27c WD |
309 | /* zero out server ether in case the server ip has changed */ |
310 | memset(NetServerEther, 0, 6); | |
311 | ||
fe8c2806 WD |
312 | TftpSend (); |
313 | } | |
314 | ||
315 | #endif /* CFG_CMD_NET */ |