/[dynamips]/trunk/nvram_export.c
This is repository of my old source code which isn't updated any more. Go to git.rot13.org for current projects!
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Contents of /trunk/nvram_export.c

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Revision 1 - (show annotations)
Sat Oct 6 16:01:44 2007 UTC (12 years ago) by dpavlin
Original Path: upstream/dynamips-0.2.5/nvram_export.c
File MIME type: text/plain
File size: 2528 byte(s)
import 0.2.5 from upstream

1 /*
2 * Cisco C7200 Simulation Platform.
3 * Copyright (c) 2005,2006 Christophe Fillot. All rights reserved.
4 *
5 * Extract IOS configuration from a NVRAM file (standalone tool)
6 */
7
8 #include <stdio.h>
9 #include <stdlib.h>
10 #include <string.h>
11 #include <time.h>
12 #include <errno.h>
13
14 #include "mips64.h"
15 #include "dynamips.h"
16 #include "memory.h"
17 #include "device.h"
18 #include "dev_c7200.h"
19
20 /* Export configuration from NVRAM */
21 int dev_nvram_export_config(char *nvram_filename,char *cfg_filename)
22 {
23 m_uint32_t tag,start,end,len,clen,nvlen;
24 FILE *nvram_fd,*cfg_fd;
25 char buffer[512];
26 int res = -1;
27
28 if (!(nvram_fd = fopen(nvram_filename,"r"))) {
29 fprintf(stderr,"Unable to open NVRAM file '%s'!\n",nvram_filename);
30 return(-1);
31 }
32
33 if (!(cfg_fd = fopen(cfg_filename,"w"))) {
34 fprintf(stderr,"Unable to create config file '%s'!\n",cfg_filename);
35 return(-1);
36 }
37
38 fseek(nvram_fd,C7200_NVRAM_ROM_RES_SIZE+6,SEEK_SET);
39 fread(&tag,sizeof(tag),1,nvram_fd);
40 if (ntohl(tag) != 0xF0A5ABCD) {
41 fprintf(stderr,"NVRAM: Unable to find IOS tag (tag=0x%8.8x)!\n",
42 ntohl(tag));
43 goto done;
44 }
45
46 fseek(nvram_fd,0x06,SEEK_CUR);
47 fread(&start,sizeof(start),1,nvram_fd);
48 fread(&end,sizeof(end),1,nvram_fd);
49 fread(&nvlen,sizeof(nvlen),1,nvram_fd);
50 start = htonl(start) + 1;
51 end = htonl(end);
52 nvlen = htonl(nvlen);
53
54 if ((start <= C7200_NVRAM_ADDR) || (end <= C7200_NVRAM_ADDR) ||
55 (end <= start))
56 {
57 fprintf(stderr,"NVRAM: invalid configuration markers "
58 "(start=0x%x,end=0x%x).\n",start,end);
59 goto done;
60 }
61
62 clen = len = end - start;
63 if ((clen + 1) != nvlen) {
64 fprintf(stderr,"NVRAM: invalid configuration size (0x%x)\n",nvlen);
65 goto done;
66 }
67
68 start -= C7200_NVRAM_ADDR;
69 fseek(nvram_fd,start,SEEK_SET);
70
71 while(len > 0) {
72 if (len > sizeof(buffer))
73 clen = sizeof(buffer);
74 else
75 clen = len;
76
77 fread(buffer,clen,1,nvram_fd);
78 fwrite(buffer,clen,1,cfg_fd);
79 len -= clen;
80 }
81
82 res = 0;
83 done:
84 fclose(nvram_fd);
85 fclose(cfg_fd);
86 return(res);
87 }
88
89 int main(int argc,char *argv[])
90 {
91 printf("Cisco 7200 NVRAM configuration export.\n");
92 printf("Copyright (c) 2006 Christophe Fillot.\n\n");
93
94 if (argc != 3) {
95 fprintf(stderr,"Usage: %s nvram_file config_file\n",argv[0]);
96 exit(EXIT_FAILURE);
97 }
98
99 if (!dev_nvram_export_config(argv[1],argv[2]))
100 printf("Configuration written to %s\n",argv[2]);
101
102 return(0);
103 }

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