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[/] [openrisc/] [trunk/] [bootloaders/] [orpmon/] [services/] [tftp.c] - Blame information for rev 662

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/*
 *      Copyright 1994, 1995, 2000 Neil Russell.
 *      (See License)
 *      Copyright 2000, 2001 DENX Software Engineering, Wolfgang Denk, wd@denx.de
 */
 
#include "common.h"
#include "support.h"
#include "net.h"
#include "tftp.h"
#include "bootp.h"
 
#define WELL_KNOWN_PORT 69      /* Well known TFTP port #               */
#define TIMEOUT         2       /* Seconds to timeout for a lost pkt    */
#define TIMEOUT_COUNT   10      /* # of timeouts before giving up       */
                                        /* (for checking the image size)        */
#define HASHES_PER_LINE 65      /* Number of "loading" hashes per line  */
 
/*
 *      TFTP operations.
 */
#define TFTP_RRQ        1
#define TFTP_WRQ        2
#define TFTP_DATA       3
#define TFTP_ACK        4
#define TFTP_ERROR      5
 
static int TftpServerPort;      /* The UDP port at their end            */
static int TftpOurPort;         /* The UDP port at our end              */
static int TftpTimeoutCount;
static unsigned TftpBlock;
static unsigned TftpLastBlock;
static int TftpState;
#define STATE_RRQ       1
#define STATE_DATA      2
#define STATE_TOO_LARGE 3
#define STATE_BAD_MAGIC 4
 
char *tftp_filename;
 
// running TFTP CRC value
unsigned long TFTP_CHKSUM;
 
#ifdef CFG_DIRECT_FLASH_TFTP
extern flash_info_t flash_info[CFG_MAX_FLASH_BANKS];
#endif
 
static __inline__ void
store_block(unsigned block, unsigned char *src, unsigned len)
{
        unsigned long offset = block * 512, newsize = offset + len;
#ifdef CFG_DIRECT_FLASH_TFTP
        int i, rc = 0;
 
        for (i = 0; i < CFG_MAX_FLASH_BANKS; i++) {
                /* start address in flash? */
                if (global.src_addr + offset >= flash_info[i].start[0]) {
                        rc = 1;
                        break;
                }
        }
 
        if (rc) {               /* Flash is destination for this packet */
                rc = flash_write((unsigned char *)src,
                                 (unsigned long)(global.src_addr + offset),
                                 len);
                switch (rc) {
                case 0:  /* OK */
                        break;
                case 1:
                        printf("Timeout writing to Flash\n");
                        break;
                case 2:
                        printf("Flash not Erased\n");
                        break;
                case 4:
                        printf("Can't write to protected Flash sectors\n");
                        break;
                case 8:
                        printf("Outside available Flash\n");
                        break;
                case 16:
                        printf("Size must be aligned (multiple of 8?)\n");
                        break;
                default:
                        printf("%s[%d] FIXME: rc=%d\n", __FILE__, __LINE__, rc);
                        break;
                }
                if (rc) {
                        NetState = NETLOOP_FAIL;
                        return;
                }
        } else
#endif /* CFG_DIRECT_FLASH_TFTP */
 
//#define QUICK_ETHPACKET_COPY    
#ifdef QUICK_ETHPACKET_COPY
        {
                unsigned char *dst =
                    (unsigned char *)(global.src_addr + offset);
                //printf("quick ethpacket copy: src: 0x%x dst: 0x%x, len: %d\n",(unsigned long)src, (unsigned long)dst, len);
                // First, align the destination address so we can copy words
                // If either src or dst are not word aligned, then we will never
                // be able to do word copies
                while ((len)
                       && ((((unsigned long)dst) & 0x3)
                           || (((unsigned long)src) & 0x3))) {
                        //              printf("bc: src: 0x%x dst: 0x%x, len: %d\n",(unsigned long)src, (unsigned long)dst, len);
                        dst[0] = src[0];
                        len--;
                        dst++;
                        src++;
 
                }
                unsigned long *wdst, *wsrc;
                wdst = (unsigned long *)dst;
                wsrc = (unsigned long *)src;
                while (len >= 4) {
                        //printf("wc: src: 0x%x dst: 0x%x, len: %d\n",(unsigned long)src, (unsigned long)dst, len);
                        wdst[0] = wsrc[0];
                        wdst++;
                        wsrc++;
                        len -= 4;
                        dst += 4;
                        src += 4;
 
                }
                while (len) {
                        //printf("cu: src: 0x%x dst: 0x%x, len: %d\n",(unsigned long)src, (unsigned long)dst, len);
                        dst[0] = src[0];
                        len--;
                        dst++;
                        src++;
                }
        }
#else
 
#ifdef TFTP_CALC_CRC
                // Call special memcpy that calculates CRC for us:
                TFTP_CHKSUM +=
                    memcpy_crc((void *)(global.src_addr + offset), src, len);
#else
                // Standard memcpy:
                (void)memcpy((void *)(global.src_addr + offset), src, len);
#endif
 
#endif
 
        if (NetBootFileXferSize < newsize)
                NetBootFileXferSize = newsize;
}
 
static void TftpSend(void);
static void TftpTimeout(void);
 
/**********************************************************************/
 
static void TftpSend(void)
{
        volatile unsigned char *pkt;
        volatile unsigned char *xp;
        int len = 0;
 
#ifdef ET_DEBUG
        printf("TftpSend: %d\n", TftpState);
#endif
 
        /*
         *      We will always be sending some sort of packet, so
         *      cobble together the packet headers now.
         */
        pkt = NetTxPacket + ETHER_HDR_SIZE + IP_HDR_SIZE;
 
        switch (TftpState) {
 
        case STATE_RRQ:
                xp = pkt;
                (*((unsigned short *)pkt)) = SWAP16c(TFTP_RRQ);
                pkt += sizeof(short);
                strcpy((char *)pkt, tftp_filename);
                pkt += strlen(tftp_filename) + 1;
                strcpy((char *)pkt, "octet");
                pkt += 5 /*strlen("octet") */  + 1;
                len = pkt - xp;
 
                break;
 
        case STATE_DATA:
                xp = pkt;
                *((unsigned short *)pkt) = SWAP16c(TFTP_ACK);
                pkt += sizeof(short);
                *((unsigned short *)pkt) = SWAP16(TftpBlock);
                pkt += sizeof(short);
                len = pkt - xp;
                break;
 
        case STATE_TOO_LARGE:
                xp = pkt;
                *((unsigned short *)pkt) = SWAP16c(TFTP_ERROR);
                pkt += sizeof(short);
                *((unsigned short *)pkt) = SWAP16(3);
                pkt += sizeof(short);
                strcpy((char *)pkt, "File too large");
                pkt += 14 /*strlen("File too large") */  + 1;
                len = pkt - xp;
                break;
 
        case STATE_BAD_MAGIC:
                xp = pkt;
                *((unsigned short *)pkt) = SWAP16c(TFTP_ERROR);
                pkt += sizeof(short);
                *((unsigned short *)pkt) = SWAP16(2);
                pkt += sizeof(short);
                strcpy((char *)pkt, "File has bad magic");
                pkt += 18 /*strlen("File has bad magic") */  + 1;
                len = pkt - xp;
                break;
        }
 
        NetSetEther(NetTxPacket, NetServerEther, PROT_IP);
        NetSetIP(NetTxPacket + ETHER_HDR_SIZE, NetServerIP,
                 TftpServerPort, TftpOurPort, len);
        NetSendPacket(NetTxPacket, ETHER_HDR_SIZE + IP_HDR_SIZE + len);
 
}
 
static void
TftpHandler(unsigned char *pkt, unsigned dest, unsigned src, unsigned len)
{
#ifdef ET_DEBUG
        //  printf("TftpHandler\n");
#endif
        if (dest != TftpOurPort) {
                return;
        }
        if (TftpState != STATE_RRQ && src != TftpServerPort) {
                return;
        }
 
        if (len < 2) {
                return;
        }
        len -= 2;
        switch (SWAP16(*((unsigned short *)pkt))) {
 
        case TFTP_RRQ:
        case TFTP_WRQ:
        case TFTP_ACK:
                pkt += sizeof(short);
                break;
        default:
                break;
 
        case TFTP_DATA:
                pkt += sizeof(short);
                if (len < 2)
                        return;
                len -= 2;
                TftpBlock = SWAP16(*(unsigned short *)pkt);
                if (((TftpBlock - 1) % 10) == 0) {
                        putc('#');
                        TftpTimeoutCount = 0;
                } else if ((TftpBlock % (10 * HASHES_PER_LINE)) == 0) {
                        printf("\n\t ");
                }
 
                if (TftpState == STATE_RRQ) {
                        TftpState = STATE_DATA;
                        TftpServerPort = src;
                        TftpLastBlock = 0;
 
                        if (TftpBlock != 1) {   /* Assertion */
                                printf("\nTFTP error: "
                                       "First block is not block 1 (%d)\n"
                                       "Starting again\n\n", TftpBlock);
                                NetStartAgain();
                                break;
                        }
                }
 
                if (TftpBlock == TftpLastBlock) {
#ifdef ET_DEBUG
                        printf("block %d - repeated\n", TftpLastBlock);
#endif
                        /*
                         *    Same block again; resend ack (maybe got lost last time)
                         */
                        TftpSend();
                        break;
                } else {
#ifdef ET_DEBUG
                        printf("block %d - OK\n", TftpLastBlock);
#endif
                        TftpLastBlock = TftpBlock;
                        NetSetTimeout(TIMEOUT * TICKS_PER_SEC, TftpTimeout);
 
                        store_block(TftpBlock - 1, pkt + 2, len);
                }
 
                /*
                 *      Acknoledge the block just received, which will prompt
                 *      the server for the next one.
                 */
                TftpSend();
 
                if (len < 512) {
                        /*
                         *      We received the whole thing.  Try to
                         *      run it.
                         */
                        printf("\ndone\n");
                        NetState = NETLOOP_SUCCESS;
                }
                break;
 
        case TFTP_ERROR:
                pkt += sizeof(short);
                printf("\nTFTP error: '%s' (%d)\n",
                       pkt + 2, SWAP16(*(unsigned short *)pkt));
                printf("Starting again\n\n");
                NetStartAgain();
                break;
        }
 
}
 
static void TftpTimeout(void)
{
        if (++TftpTimeoutCount >= TIMEOUT_COUNT) {
                printf("\nRetry count exceeded; starting again\n");
                NetStartAgain();
        } else {
                printf("T ");
                NetSetTimeout(TIMEOUT * TICKS_PER_SEC, TftpTimeout);
                TftpSend();
        }
}
 
void TftpStart(void)
{
#ifdef ET_DEBUG
        printf("\nServer ethernet address %02x:%02x:%02x:%02x:%02x:%02x\n",
               NetServerEther[0],
               NetServerEther[1],
               NetServerEther[2],
               NetServerEther[3], NetServerEther[4], NetServerEther[5]
            );
#endif /* DEBUG */
 
        TFTP_CHKSUM = 0; // Reset checksum
 
        printf("TFTP from server ");
        print_IPaddr(NetServerIP);
        printf("; our IP address is ");
        print_IPaddr(NetOurIP);
 
        // Check if we need to send across this subnet
        if (NetOurGatewayIP && NetOurSubnetMask) {
                IPaddr_t OurNet = NetOurIP & NetOurSubnetMask;
                IPaddr_t ServerNet = NetServerIP & NetOurSubnetMask;
 
                if (OurNet != ServerNet) {
                        printf("; sending through gateway ");
                        print_IPaddr(NetOurGatewayIP);
                }
        }
        putc('\n');
 
        printf("Filename '%s'.", tftp_filename);
 
        if (NetBootFileSize) {
                printf(" Size is %d%s kB => %x Bytes",
                       NetBootFileSize / 2,
                       (NetBootFileSize % 2) ? ".5" : "", NetBootFileSize << 9);
        }
 
        putc('\n');
 
        printf("Load address: 0x%lx\n", global.src_addr);
 
        printf("Loading: *\b");
 
        NetSetTimeout(TIMEOUT * TICKS_PER_SEC, TftpTimeout);
        NetSetHandler(TftpHandler);
 
        TftpServerPort = WELL_KNOWN_PORT;
        TftpTimeoutCount = 0;
        TftpState = STATE_RRQ;
        TftpOurPort = 1024 + (get_timer(0) % 3072);
 
        TftpSend();
}

Line No.	Rev	Author	Line
1	2	marcus.erl	`/*`
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 "support.h"`
9			`#include "net.h"`
10			`#include "tftp.h"`
11			`#include "bootp.h"`
12
13	406	julius	`#define WELL_KNOWN_PORT 69 /* Well known TFTP port # */`
14			`#define TIMEOUT 2 /* Seconds to timeout for a lost pkt */`
15			`#define TIMEOUT_COUNT 10 /* # of timeouts before giving up */`
16			`/* (for checking the image size) */`
17			`#define HASHES_PER_LINE 65 /* Number of "loading" hashes per line */`
18	2	marcus.erl
19			`/*`
20			`* TFTP operations.`
21			`*/`
22			`#define TFTP_RRQ 1`
23			`#define TFTP_WRQ 2`
24			`#define TFTP_DATA 3`
25			`#define TFTP_ACK 4`
26			`#define TFTP_ERROR 5`
27
28	406	julius	`static int TftpServerPort; /* The UDP port at their end */`
29			`static int TftpOurPort; /* The UDP port at our end */`
30			`static int TftpTimeoutCount;`
31			`static unsigned TftpBlock;`
32			`static unsigned TftpLastBlock;`
33			`static int TftpState;`
34	2	marcus.erl	`#define STATE_RRQ 1`
35			`#define STATE_DATA 2`
36			`#define STATE_TOO_LARGE 3`
37			`#define STATE_BAD_MAGIC 4`
38
39			`char *tftp_filename;`
40
41	140	julius	`// running TFTP CRC value`
42			`unsigned long TFTP_CHKSUM;`
43
44	2	marcus.erl	`#ifdef CFG_DIRECT_FLASH_TFTP`
45			`extern flash_info_t flash_info[CFG_MAX_FLASH_BANKS];`
46			`#endif`
47
48			`static __inline__ void`
49	406	julius	`store_block(unsigned block, unsigned char *src, unsigned len)`
50	2	marcus.erl	`{`
51			`unsigned long offset = block * 512, newsize = offset + len;`
52			`#ifdef CFG_DIRECT_FLASH_TFTP`
53			`int i, rc = 0;`
54
55	406	julius	`for (i = 0; i < CFG_MAX_FLASH_BANKS; i++) {`
56	2	marcus.erl	`/* start address in flash? */`
57			`if (global.src_addr + offset >= flash_info[i].start[0]) {`
58			`rc = 1;`
59			`break;`
60			`}`
61			`}`
62
63	406	julius	`if (rc) { /* Flash is destination for this packet */`
64			`rc = flash_write((unsigned char *)src,`
65			`(unsigned long)(global.src_addr + offset),`
66			`len);`
67	2	marcus.erl	`switch (rc) {`
68			`case 0: /* OK */`
69			`break;`
70	406	julius	`case 1:`
71			`printf("Timeout writing to Flash\n");`
72	2	marcus.erl	`break;`
73	406	julius	`case 2:`
74			`printf("Flash not Erased\n");`
75	2	marcus.erl	`break;`
76	406	julius	`case 4:`
77			`printf("Can't write to protected Flash sectors\n");`
78	2	marcus.erl	`break;`
79	406	julius	`case 8:`
80			`printf("Outside available Flash\n");`
81	2	marcus.erl	`break;`
82	406	julius	`case 16:`
83			`printf("Size must be aligned (multiple of 8?)\n");`
84	2	marcus.erl	`break;`
85			`default:`
86	406	julius	`printf("%s[%d] FIXME: rc=%d\n", __FILE__, __LINE__, rc);`
87	2	marcus.erl	`break;`
88			`}`
89			`if (rc) {`
90			`NetState = NETLOOP_FAIL;`
91			`return;`
92			`}`
93	406	julius	`} else`
94	2	marcus.erl	`#endif /* CFG_DIRECT_FLASH_TFTP */`
95	140	julius
96	406	julius	`//#define QUICK_ETHPACKET_COPY`
97	140	julius	`#ifdef QUICK_ETHPACKET_COPY`
98	406	julius	`{`
99			`unsigned char *dst =`
100			`(unsigned char *)(global.src_addr + offset);`
101			`//printf("quick ethpacket copy: src: 0x%x dst: 0x%x, len: %d\n",(unsigned long)src, (unsigned long)dst, len);`
102			`// First, align the destination address so we can copy words`
103			`// If either src or dst are not word aligned, then we will never`
104			`// be able to do word copies`
105			`while ((len)`
106			`&& ((((unsigned long)dst) & 0x3)`
107			`\|\| (((unsigned long)src) & 0x3))) {`
108			`// printf("bc: src: 0x%x dst: 0x%x, len: %d\n",(unsigned long)src, (unsigned long)dst, len);`
109			`dst[0] = src[0];`
110			`len--;`
111			`dst++;`
112			`src++;`
113	140	julius
114	406	julius	`}`
115			`unsigned long wdst, wsrc;`
116			`wdst = (unsigned long *)dst;`
117			`wsrc = (unsigned long *)src;`
118			`while (len >= 4) {`
119			`//printf("wc: src: 0x%x dst: 0x%x, len: %d\n",(unsigned long)src, (unsigned long)dst, len);`
120			`wdst[0] = wsrc[0];`
121			`wdst++;`
122			`wsrc++;`
123			`len -= 4;`
124			`dst += 4;`
125			`src += 4;`
126
127			`}`
128			`while (len) {`
129			`//printf("cu: src: 0x%x dst: 0x%x, len: %d\n",(unsigned long)src, (unsigned long)dst, len);`
130			`dst[0] = src[0];`
131			`len--;`
132			`dst++;`
133			`src++;`
134			`}`
135			`}`
136	140	julius	`#else`
137	406	julius
138	140	julius	`#ifdef TFTP_CALC_CRC`
139	406	julius	`// Call special memcpy that calculates CRC for us:`
140			`TFTP_CHKSUM +=`
141			`memcpy_crc((void *)(global.src_addr + offset), src, len);`
142	140	julius	`#else`
143	406	julius	`// Standard memcpy:`
144			`(void)memcpy((void *)(global.src_addr + offset), src, len);`
145	140	julius	`#endif`
146	2	marcus.erl
147	406	julius	`#endif`
148	140	julius
149	2	marcus.erl	`if (NetBootFileXferSize < newsize)`
150			`NetBootFileXferSize = newsize;`
151			`}`
152
153	406	julius	`static void TftpSend(void);`
154			`static void TftpTimeout(void);`
155	2	marcus.erl
156			`/**********************************************************************/`
157
158	406	julius	`static void TftpSend(void)`
159	2	marcus.erl	`{`
160	406	julius	`volatile unsigned char *pkt;`
161			`volatile unsigned char *xp;`
162			`int len = 0;`
163	2	marcus.erl
164	140	julius	`#ifdef ET_DEBUG`
165	246	julius	`printf("TftpSend: %d\n", TftpState);`
166	140	julius	`#endif`
167
168	2	marcus.erl	`/*`
169	406	julius	`* We will always be sending some sort of packet, so`
170			`* cobble together the packet headers now.`
171	2	marcus.erl	`*/`
172			`pkt = NetTxPacket + ETHER_HDR_SIZE + IP_HDR_SIZE;`
173
174			`switch (TftpState) {`
175
176			`case STATE_RRQ:`
177			`xp = pkt;`
178	140	julius	`(((unsigned short )pkt)) = SWAP16c(TFTP_RRQ);`
179			`pkt += sizeof(short);`
180	406	julius	`strcpy((char *)pkt, tftp_filename);`
181	2	marcus.erl	`pkt += strlen(tftp_filename) + 1;`
182	406	julius	`strcpy((char *)pkt, "octet");`
183			`pkt += 5 /strlen("octet") / + 1;`
184	2	marcus.erl	`len = pkt - xp;`
185	140	julius
186	2	marcus.erl	`break;`
187
188			`case STATE_DATA:`
189			`xp = pkt;`
190	140	julius	`((unsigned short )pkt) = SWAP16c(TFTP_ACK);`
191			`pkt += sizeof(short);`
192			`((unsigned short )pkt) = SWAP16(TftpBlock);`
193			`pkt += sizeof(short);`
194	2	marcus.erl	`len = pkt - xp;`
195			`break;`
196
197			`case STATE_TOO_LARGE:`
198			`xp = pkt;`
199	140	julius	`((unsigned short )pkt) = SWAP16c(TFTP_ERROR);`
200			`pkt += sizeof(short);`
201			`((unsigned short )pkt) = SWAP16(3);`
202			`pkt += sizeof(short);`
203	406	julius	`strcpy((char *)pkt, "File too large");`
204			`pkt += 14 /strlen("File too large") / + 1;`
205	2	marcus.erl	`len = pkt - xp;`
206			`break;`
207
208			`case STATE_BAD_MAGIC:`
209			`xp = pkt;`
210	140	julius	`((unsigned short )pkt) = SWAP16c(TFTP_ERROR);`
211			`pkt += sizeof(short);`
212			`((unsigned short )pkt) = SWAP16(2);`
213			`pkt += sizeof(short);`
214	406	julius	`strcpy((char *)pkt, "File has bad magic");`
215			`pkt += 18 /strlen("File has bad magic") / + 1;`
216	2	marcus.erl	`len = pkt - xp;`
217			`break;`
218			`}`
219
220	406	julius	`NetSetEther(NetTxPacket, NetServerEther, PROT_IP);`
221			`NetSetIP(NetTxPacket + ETHER_HDR_SIZE, NetServerIP,`
222			`TftpServerPort, TftpOurPort, len);`
223			`NetSendPacket(NetTxPacket, ETHER_HDR_SIZE + IP_HDR_SIZE + len);`
224	140	julius
225	2	marcus.erl	`}`
226
227			`static void`
228	406	julius	`TftpHandler(unsigned char *pkt, unsigned dest, unsigned src, unsigned len)`
229	2	marcus.erl	`{`
230	140	julius	`#ifdef ET_DEBUG`
231	406	julius	`// printf("TftpHandler\n");`
232	140	julius	`#endif`
233	2	marcus.erl	`if (dest != TftpOurPort) {`
234			`return;`
235			`}`
236			`if (TftpState != STATE_RRQ && src != TftpServerPort) {`
237			`return;`
238			`}`
239
240			`if (len < 2) {`
241			`return;`
242			`}`
243			`len -= 2;`
244	140	julius	`switch (SWAP16(((unsigned short )pkt))) {`
245	2	marcus.erl
246			`case TFTP_RRQ:`
247			`case TFTP_WRQ:`
248			`case TFTP_ACK:`
249	406	julius	`pkt += sizeof(short);`
250	2	marcus.erl	`break;`
251			`default:`
252			`break;`
253
254			`case TFTP_DATA:`
255	406	julius	`pkt += sizeof(short);`
256	2	marcus.erl	`if (len < 2)`
257			`return;`
258			`len -= 2;`
259			`TftpBlock = SWAP16((unsigned short )pkt);`
260			`if (((TftpBlock - 1) % 10) == 0) {`
261	406	julius	`putc('#');`
262	2	marcus.erl	`TftpTimeoutCount = 0;`
263			`} else if ((TftpBlock % (10 * HASHES_PER_LINE)) == 0) {`
264	406	julius	`printf("\n\t ");`
265	2	marcus.erl	`}`
266
267			`if (TftpState == STATE_RRQ) {`
268			`TftpState = STATE_DATA;`
269			`TftpServerPort = src;`
270			`TftpLastBlock = 0;`
271
272			`if (TftpBlock != 1) { /* Assertion */`
273	406	julius	`printf("\nTFTP error: "`
274			`"First block is not block 1 (%d)\n"`
275			`"Starting again\n\n", TftpBlock);`
276			`NetStartAgain();`
277	2	marcus.erl	`break;`
278			`}`
279			`}`
280	405	julius
281	2	marcus.erl	`if (TftpBlock == TftpLastBlock) {`
282	405	julius	`#ifdef ET_DEBUG`
283	406	julius	`printf("block %d - repeated\n", TftpLastBlock);`
284	405	julius	`#endif`
285	406	julius	`/*`
286			`* Same block again; resend ack (maybe got lost last time)`
287			`*/`
288			`TftpSend();`
289			`break;`
290			`} else {`
291	405	julius	`#ifdef ET_DEBUG`
292	406	julius	`printf("block %d - OK\n", TftpLastBlock);`
293	405	julius	`#endif`
294	406	julius	`TftpLastBlock = TftpBlock;`
295			`NetSetTimeout(TIMEOUT * TICKS_PER_SEC, TftpTimeout);`
296
297			`store_block(TftpBlock - 1, pkt + 2, len);`
298			`}`
299
300	2	marcus.erl	`/*`
301	406	julius	`* Acknoledge the block just received, which will prompt`
302			`* the server for the next one.`
303	2	marcus.erl	`*/`
304	406	julius	`TftpSend();`
305
306	2	marcus.erl	`if (len < 512) {`
307			`/*`
308	406	julius	`* We received the whole thing. Try to`
309			`* run it.`
310	2	marcus.erl	`*/`
311	406	julius	`printf("\ndone\n");`
312	2	marcus.erl	`NetState = NETLOOP_SUCCESS;`
313			`}`
314			`break;`
315
316			`case TFTP_ERROR:`
317	406	julius	`pkt += sizeof(short);`
318			`printf("\nTFTP error: '%s' (%d)\n",`
319			`pkt + 2, SWAP16((unsigned short )pkt));`
320			`printf("Starting again\n\n");`
321			`NetStartAgain();`
322	2	marcus.erl	`break;`
323			`}`
324	406	julius
325	2	marcus.erl	`}`
326
327	406	julius	`static void TftpTimeout(void)`
328	2	marcus.erl	`{`
329			`if (++TftpTimeoutCount >= TIMEOUT_COUNT) {`
330	406	julius	`printf("\nRetry count exceeded; starting again\n");`
331			`NetStartAgain();`
332	2	marcus.erl	`} else {`
333	406	julius	`printf("T ");`
334			`NetSetTimeout(TIMEOUT * TICKS_PER_SEC, TftpTimeout);`
335			`TftpSend();`
336	2	marcus.erl	`}`
337			`}`
338
339	406	julius	`void TftpStart(void)`
340	2	marcus.erl	`{`
341			`#ifdef ET_DEBUG`
342	406	julius	`printf("\nServer ethernet address %02x:%02x:%02x:%02x:%02x:%02x\n",`
343			`NetServerEther[0],`
344			`NetServerEther[1],`
345			`NetServerEther[2],`
346			`NetServerEther[3], NetServerEther[4], NetServerEther[5]`
347			`);`
348	2	marcus.erl	`#endif /* DEBUG */`
349
350	406	julius	`TFTP_CHKSUM = 0; // Reset checksum`
351	140	julius
352	406	julius	`printf("TFTP from server ");`
353			`print_IPaddr(NetServerIP);`
354			`printf("; our IP address is ");`
355			`print_IPaddr(NetOurIP);`
356	2	marcus.erl
357			`// Check if we need to send across this subnet`
358			`if (NetOurGatewayIP && NetOurSubnetMask) {`
359	406	julius	`IPaddr_t OurNet = NetOurIP & NetOurSubnetMask;`
360			`IPaddr_t ServerNet = NetServerIP & NetOurSubnetMask;`
361	2	marcus.erl
362	406	julius	`if (OurNet != ServerNet) {`
363			`printf("; sending through gateway ");`
364			`print_IPaddr(NetOurGatewayIP);`
365			`}`
366	2	marcus.erl	`}`
367	406	julius	`putc('\n');`
368	2	marcus.erl
369	406	julius	`printf("Filename '%s'.", tftp_filename);`
370	2	marcus.erl
371			`if (NetBootFileSize) {`
372	406	julius	`printf(" Size is %d%s kB => %x Bytes",`
373			`NetBootFileSize / 2,`
374			`(NetBootFileSize % 2) ? ".5" : "", NetBootFileSize << 9);`
375	2	marcus.erl	`}`
376
377	406	julius	`putc('\n');`
378	2	marcus.erl
379	406	julius	`printf("Load address: 0x%lx\n", global.src_addr);`
380	2	marcus.erl
381	406	julius	`printf("Loading: *\b");`
382	2	marcus.erl
383	406	julius	`NetSetTimeout(TIMEOUT * TICKS_PER_SEC, TftpTimeout);`
384			`NetSetHandler(TftpHandler);`
385	2	marcus.erl
386			`TftpServerPort = WELL_KNOWN_PORT;`
387			`TftpTimeoutCount = 0;`
388			`TftpState = STATE_RRQ;`
389			`TftpOurPort = 1024 + (get_timer(0) % 3072);`
390
391	406	julius	`TftpSend();`
392	2	marcus.erl	`}`

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