summaryrefslogtreecommitdiff
path: root/package/nvram/src/nvram_linux.c
blob: c41e32118ac1e03fe10b2d6e045635a60d23325c (plain)
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
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
/*
 * NVRAM variable manipulation (Linux user mode half)
 *
 * Copyright 2004, Broadcom Corporation
 * All Rights Reserved.
 * 
 * THIS SOFTWARE IS OFFERED "AS IS", AND BROADCOM GRANTS NO WARRANTIES OF ANY
 * KIND, EXPRESS OR IMPLIED, BY STATUTE, COMMUNICATION OR OTHERWISE. BROADCOM
 * SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS
 * FOR A SPECIFIC PURPOSE OR NONINFRINGEMENT CONCERNING THIS SOFTWARE.
 *
 * $Id$
 */

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <error.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <sys/mman.h>

#include <typedefs.h>
#include <bcmnvram.h>
#include <nvram_convert.h>
#include <shutils.h>
#include <utils.h>

#define PATH_DEV_NVRAM "/dev/nvram"

/* Globals */
static int nvram_fd = -1;
static char *nvram_buf = NULL;
int check_action(void);
int file_to_buf(char *path, char *buf, int len);

int
nvram_init(void *unused)
{
	if ((nvram_fd = open(PATH_DEV_NVRAM, O_RDWR)) < 0)
		goto err;

	/* Map kernel string buffer into user space */
	if ((nvram_buf = mmap(NULL, NVRAM_SPACE, PROT_READ, MAP_SHARED, nvram_fd, 0)) == MAP_FAILED) {
		close(nvram_fd);
		nvram_fd = -1;
		goto err;
	}

	return 0;

 err:
	perror(PATH_DEV_NVRAM);
	return errno;
}

char *
nvram_get(const char *name)
{
	size_t count = strlen(name) + 1;
	char tmp[100], *value;
	unsigned long *off = (unsigned long *) tmp;

	if (nvram_fd < 0)
		if (nvram_init(NULL))
			return NULL;

	if (count > sizeof(tmp)) {
		if (!(off = malloc(count)))
			return NULL;
	}

	/* Get offset into mmap() space */
	strcpy((char *) off, name);

	count = read(nvram_fd, off, count);

	if (count == sizeof(unsigned long))
		value = &nvram_buf[*off];
	else
		value = NULL;

	if (count < 0)
		perror(PATH_DEV_NVRAM);

	if (off != (unsigned long *) tmp)
		free(off);

	return value;
}

int
nvram_getall(char *buf, int count)
{
	int ret;

	if (nvram_fd < 0)
		if ((ret = nvram_init(NULL)))
			return ret;

	if (count == 0)
		return 0;

	/* Get all variables */
	*buf = '\0';

	ret = read(nvram_fd, buf, count);

	if (ret < 0)
		perror(PATH_DEV_NVRAM);

	return (ret == count) ? 0 : ret;
}

static int
_nvram_set(const char *name, const char *value)
{
	size_t count = strlen(name) + 1;
	char tmp[100], *buf = tmp;
	int ret;

	if (nvram_fd < 0)
		if ((ret = nvram_init(NULL)))
			return ret;

	/* Unset if value is NULL */
	if (value)
		count += strlen(value) + 1;

	if (count > sizeof(tmp)) {
		if (!(buf = malloc(count)))
			return -ENOMEM;
	}

	if (value)
		sprintf(buf, "%s=%s", name, value);
	else
		strcpy(buf, name);

	ret = write(nvram_fd, buf, count);

	if (ret < 0)
		perror(PATH_DEV_NVRAM);

	if (buf != tmp)
		free(buf);

	return (ret == count) ? 0 : ret;
}

int
nvram_set(const char *name, const char *value)
{
	 extern struct nvram_convert nvram_converts[];
         struct nvram_convert *v;
         int ret;

         ret = _nvram_set(name, value);

         for(v = nvram_converts ; v->name ; v++) {
                 if(!strcmp(v->name, name)){
                         if(strcmp(v->wl0_name,""))      _nvram_set(v->wl0_name, value);
                         if(strcmp(v->d11g_name,""))     _nvram_set(v->d11g_name, value);
                 }
         }

         return ret;
}

int
nvram_unset(const char *name)
{
	return _nvram_set(name, NULL);
}

int
nvram_commit(void)
{
	int ret;
	
	cprintf("nvram_commit(): start\n");	
	
	if((check_action() == ACT_IDLE) || 
	   (check_action() == ACT_SW_RESTORE) || 
	   (check_action() == ACT_HW_RESTORE)){
		if (nvram_fd < 0)
			if ((ret = nvram_init(NULL)))
				return ret;

		ret = ioctl(nvram_fd, NVRAM_MAGIC, NULL);

		if (ret < 0)
			perror(PATH_DEV_NVRAM);
	
		cprintf("nvram_commit(): end\n");	
	}
	else
		cprintf("nvram_commit():  nothing to do...\n");

	return ret;
}

int file2nvram(char *filename, char *varname) {
   FILE *fp;
   int c,count;
   int i=0,j=0;
   char mem[10000],buf[30000];

   if ( !(fp=fopen(filename,"rb") ))
        return 0;

   count=fread(mem,1,sizeof(mem),fp);
   fclose(fp);
   for (j=0;j<count;j++) {
        if  (i > sizeof(buf)-3 )
                break;
        c=mem[j];
        if (c >= 32 && c <= 126 && c != '\\' && c != '~')  {
                buf[i++]=(unsigned char) c;
        } else if (c==0) {
		buf[i++]='~';
        } else {
                buf[i++]='\\';
                sprintf(buf+i,"%02X",c);
                i+=2;
        }
   }
   if (i==0) return 0;
   buf[i]=0;
   //fprintf(stderr,"================ > file2nvram %s = [%s] \n",varname,buf); 
   nvram_set(varname,buf);
   //nvram_commit(); //Barry adds for test
}

int nvram2file(char *varname, char *filename) {
   FILE *fp;
   int c,tmp;
   int i=0,j=0;
   char *buf;
   char mem[10000];
   
   if ( !(fp=fopen(filename,"wb") ))
        return 0;
        
   buf=strdup(nvram_safe_get(varname));
   //fprintf(stderr,"=================> nvram2file %s = [%s] \n",varname,buf);
   while (  buf[i] && j < sizeof(mem)-3 ) {
        if (buf[i] == '\\')  {
                i++;
                tmp=buf[i+2];
                buf[i+2]=0;
                sscanf(buf+i,"%02X",&c);
                buf[i+2]=tmp;
                i+=2;
                mem[j]=c;j++;
        } else if (buf[i] == '~') {
		mem[j]=0;j++;
		i++;
        } else {
                mem[j]=buf[i];j++;
                i++;
        }       
   }
   if (j<=0) return j;
   j=fwrite(mem,1,j,fp);
   fclose(fp);
   free(buf);
   return j;
}  

int
check_action(void)
{
	char buf[80] = "";
	
	if(file_to_buf(ACTION_FILE, buf, sizeof(buf))){
		if(!strcmp(buf, "ACT_TFTP_UPGRADE")){
			cprintf("Upgrading from tftp now, quiet exit....\n");
			return ACT_TFTP_UPGRADE;
		}
		else if(!strcmp(buf, "ACT_WEBS_UPGRADE")){
			cprintf("Upgrading from web (https) now, quiet exit....\n");
			return ACT_WEBS_UPGRADE;
		}
		else if(!strcmp(buf, "ACT_WEB_UPGRADE")){
			cprintf("Upgrading from web (http) now, quiet exit....\n");
			return ACT_WEB_UPGRADE;
		}
		else if(!strcmp(buf, "ACT_SW_RESTORE")){
			cprintf("Receive restore command from web, quiet exit....\n");
			return ACT_SW_RESTORE;
		}
		else if(!strcmp(buf, "ACT_HW_RESTORE")){
			cprintf("Receive restore commond from resetbutton, quiet exit....\n");
			return ACT_HW_RESTORE;
		}
	}
	//fprintf(stderr, "Waiting for upgrading....\n");
	return ACT_IDLE;
}

int
file_to_buf(char *path, char *buf, int len)
{
	FILE *fp;

	memset(buf, 0 , len);

	if ((fp = fopen(path, "r"))) {
		fgets(buf, len, fp);
		fclose(fp);
		return 1;
	}

	return 0;
}