1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
|
/*
* ekermit-test.c
* --------------
* A test program for the E-Kermit library.
*
* Copyright (c) 2016, NORDUnet A/S All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of the NORDUnet nor the names of its contributors may
* be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/* This receives one or more files from a kermit client (e.g. C-Kermit),
* and stores them in a minimal file system on SDRAM.
*/
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include "stm-init.h"
#include "stm-sdram.h"
#include "sdram-malloc.h"
#include "stm-kermit.h"
/* alignment for file allocations */
#define ALIGN 16
/* maximum length of file name */
#define NAMELEN 32
/* maximum number of files */
#define NFILE 4
typedef struct {
char name[NAMELEN];
uint8_t *loc;
size_t len;
} filetab_t;
filetab_t filetab[NFILE], *curfile;
int nfile;
#ifdef DUMP
static void hexdump(uint8_t *buf, int len)
{
for ( ; len > 0; buf += 16, len -= 16) {
int plen = (len > 16) ? 16 : len;
int i;
for (i = 0; i < plen; ++i)
printf("%02x ", buf[i]);
for ( ; i < 16; ++i)
printf(" ");
printf("| ");
for (i = 0; i < plen; ++i)
printf("%c", isprint(buf[i]) ? buf[i] : ' ');
printf("\n");
}
}
#endif
/* Override weak function defintions for callouts in stm-kermit.c */
/* Called when kermit receives an F (file) packet
*/
int kermit_openfile(unsigned char *name)
{
if (nfile == NFILE) {
curfile = NULL;
return -1;
}
curfile = &filetab[nfile];
strncpy(curfile->name, (char *)name, sizeof(curfile->name));
curfile->loc = sdram_malloc(0);
if (curfile->loc == NULL) {
curfile = NULL;
return -1;
}
curfile->len = 0;
++nfile;
return 0;
}
/* Called when kermit's receive buffer is full, after some number of D
* (data) packets
*/
int kermit_writefile(unsigned char *buf, int len)
{
if (curfile == NULL)
return -1;
uint8_t *writeptr = sdram_malloc(len);
if (writeptr == NULL)
return -1;
memcpy(writeptr, buf, len);
curfile->len += len;
return 0;
}
/* Called when kermit receives a Z (EOF) packet
*/
int kermit_closefile(void)
{
if (curfile == NULL)
return -1;
int pad = ALIGN - (curfile->len & (ALIGN - 1));
if (sdram_malloc(pad) == NULL)
return -1;
curfile = NULL;
return 0;
}
/* Called when kermit receives a Z (EOF) packet with a D (discard) flag
*/
int kermit_cancelfile(void)
{
if (curfile == NULL)
return -1;
sdram_free(curfile->loc);
memset(curfile, 0, sizeof(*curfile));
--nfile;
return 0;
}
/* The main function is pretty simple, because the kermit library does all
* the work out of sight.
*/
int main(void)
{
stm_init();
sdram_init();
while (1) {
memset((void *)filetab, 0, sizeof(filetab));
curfile = NULL;
nfile = 0;
kermit_main();
for (int i = 0; i < nfile; ++i) {
filetab_t *f = &filetab[i];
printf("%d. %-16s %p %d\n", i, f->name, f->loc, f->len);
#ifdef DUMP
hexdump(f->loc, f->len);
#endif
sdram_free(f->loc);
}
}
}
|
