/[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 6 - (show annotations)
Sat Oct 6 16:09:07 2007 UTC (12 years ago) by dpavlin
Original Path: upstream/dynamips-0.2.6-RC5/nvram_export.c
File MIME type: text/plain
File size: 4800 byte(s)
dynamips-0.2.6-RC5

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 #include "dev_c3600.h"
20
21 #define PLATFORM_C7200 0x37323030
22 #define PLATFORM_C3600 0x33363030
23
24 /* Export configuration from 7200 NVRAM */
25 int dev_nvram_7200_export_config(FILE *nvram_fd,FILE *cfg_fd)
26 {
27 m_uint32_t tag,start,end,len,clen,nvlen;
28 char buffer[512];
29 int res = -1;
30
31 fseek(nvram_fd,C7200_NVRAM_ROM_RES_SIZE+6,SEEK_SET);
32 fread(&tag,sizeof(tag),1,nvram_fd);
33 if (ntohl(tag) != 0xF0A5ABCD) {
34 fprintf(stderr,"NVRAM: Unable to find IOS tag (tag=0x%8.8x)!\n",
35 ntohl(tag));
36 goto done;
37 }
38
39 fseek(nvram_fd,0x06,SEEK_CUR);
40 fread(&start,sizeof(start),1,nvram_fd);
41 fread(&end,sizeof(end),1,nvram_fd);
42 fread(&nvlen,sizeof(nvlen),1,nvram_fd);
43 start = htonl(start) + 1;
44 end = htonl(end);
45 nvlen = htonl(nvlen);
46
47 if ((start <= C7200_NVRAM_ADDR) || (end <= C7200_NVRAM_ADDR) ||
48 (end <= start))
49 {
50 fprintf(stderr,"NVRAM: invalid configuration markers "
51 "(start=0x%x,end=0x%x).\n",start,end);
52 goto done;
53 }
54
55 clen = len = end - start;
56 if ((clen + 1) != nvlen) {
57 fprintf(stderr,"NVRAM: invalid configuration size (0x%x)\n",nvlen);
58 goto done;
59 }
60
61 start -= C7200_NVRAM_ADDR;
62 fseek(nvram_fd,start,SEEK_SET);
63
64 while(len > 0) {
65 if (len > sizeof(buffer))
66 clen = sizeof(buffer);
67 else
68 clen = len;
69
70 fread(buffer,clen,1,nvram_fd);
71 fwrite(buffer,clen,1,cfg_fd);
72 len -= clen;
73 }
74
75 res = 0;
76 done:
77 return res;
78 }
79
80 /* Export configuration from 3600 NVRAM */
81 int dev_nvram_3600_export_config(FILE *nvram_fd,FILE *cfg_fd)
82 {
83 m_uint32_t tag,start,end,len,clen,nvlen;
84 char buffer[512];
85 int res = -1;
86
87 fseek(nvram_fd,C3600_NVRAM_ROM_RES_SIZE+6,SEEK_SET);
88 fread(&tag,sizeof(tag),1,nvram_fd);
89 if (ntohl(tag) != 0xF0A5ABCD) {
90 fprintf(stderr,"NVRAM: Unable to find IOS tag (tag=0x%8.8x)!\n",
91 ntohl(tag));
92 goto done;
93 }
94
95 fseek(nvram_fd,0x06,SEEK_CUR);
96 fread(&start,sizeof(start),1,nvram_fd);
97 fread(&end,sizeof(end),1,nvram_fd);
98 fread(&nvlen,sizeof(nvlen),1,nvram_fd);
99 start = htonl(start) + 1 + C3600_NVRAM_ADDR + C3600_NVRAM_ROM_RES_SIZE + 8;
100 end = htonl(end) + C3600_NVRAM_ADDR + C3600_NVRAM_ROM_RES_SIZE + 8;
101 nvlen = htonl(nvlen);
102
103 if ((start <= C3600_NVRAM_ADDR) || (end <= C3600_NVRAM_ADDR) ||
104 (end <= start))
105 {
106 fprintf(stderr,"NVRAM: invalid configuration markers "
107 "(start=0x%x,end=0x%x).\n",start,end);
108 goto done;
109 }
110
111 clen = len = end - start;
112 if ((clen + 1) != nvlen) {
113 fprintf(stderr,"NVRAM: invalid configuration size (0x%x)\n",nvlen);
114 goto done;
115 }
116
117 start -= C3600_NVRAM_ADDR;
118 fseek(nvram_fd,start,SEEK_SET);
119
120 while(len > 0) {
121 if (len > sizeof(buffer))
122 clen = sizeof(buffer);
123 else
124 clen = len;
125
126 fread(buffer,clen,1,nvram_fd);
127 fwrite(buffer,clen,1,cfg_fd);
128 len -= clen;
129 }
130
131 res = 0;
132 done:
133 return res;
134 }
135
136 /* Export configuration from NVRAM */
137 int dev_nvram_export_config(char *nvram_filename,char *cfg_filename)
138 {
139 m_uint32_t platform;
140 FILE *nvram_fd,*cfg_fd;
141 char platform_string[5];
142 int res = -1;
143
144 if (!(nvram_fd = fopen(nvram_filename,"r"))) {
145 fprintf(stderr,"Unable to open NVRAM file '%s'!\n",nvram_filename);
146 return(-1);
147 }
148
149 if (!(cfg_fd = fopen(cfg_filename,"w"))) {
150 fprintf(stderr,"Unable to create config file '%s'!\n",cfg_filename);
151 return(-1);
152 }
153
154 fseek(nvram_fd,0x200,SEEK_SET);
155 fread(&platform,sizeof(platform),1,nvram_fd);
156
157 switch(ntohl(platform)) {
158 case PLATFORM_C7200:
159 res = dev_nvram_7200_export_config(nvram_fd,cfg_fd);
160 break;
161 case PLATFORM_C3600:
162 res = dev_nvram_3600_export_config(nvram_fd,cfg_fd);
163 break;
164 default:
165 memcpy(platform_string,&platform,4);
166 platform_string[4] = '\0';
167 fprintf(stderr,"NVRAM: unknown platform %s (platform=0x%x)!\n",
168 platform_string,ntohl(platform));
169 }
170
171 fclose(nvram_fd);
172 fclose(cfg_fd);
173 return(res);
174 }
175
176 int main(int argc,char *argv[])
177 {
178 printf("Cisco 7200/3600 NVRAM configuration export.\n");
179 printf("Copyright (c) 2006 Christophe Fillot.\n\n");
180
181 if (argc != 3) {
182 fprintf(stderr,"Usage: %s nvram_file config_file\n",argv[0]);
183 exit(EXIT_FAILURE);
184 }
185
186 if (!dev_nvram_export_config(argv[1],argv[2]))
187 printf("Configuration written to %s\n",argv[2]);
188
189 return(0);
190 }

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