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
|
/*
* Copyright (c) 2015 Andreas Schneider <asn@cryptomilk.org>
* Copyright (c) 2017 Christopher N. Hesse <raymanfx@gmail.com>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#define LOG_TAG "wifiloader"
#define LOG_NDEBUG 0
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <cutils/log.h>
#include <sys/stat.h>
#include <sys/syscall.h>
#define DEFERRED_INITCALLS "/proc/deferred_initcalls"
#ifndef WIFI_DRIVER_MODULE_NAME
#define WIFI_DRIVER_MODULE_NAME "wlan"
#endif
#ifndef WIFI_DRIVER_MODULE_PATH
#define WIFI_DRIVER_MODULE_PATH "/system/lib/modules/" WIFI_DRIVER_MODULE_NAME ".ko"
#endif
#define finit_module(fd, params, flags) syscall(__NR_finit_module, fd, params, flags)
static int check_module_loaded(char const *tag)
{
FILE *proc;
char line[126];
if ((proc = fopen("/proc/modules", "r")) == NULL) {
ALOGW("Could not open %s: %s", "/proc/modules", strerror(errno));
return -errno;
}
while ((fgets(line, sizeof(line), proc)) != NULL) {
if (strncmp(line, tag, strlen(tag)) == 0) {
fclose(proc);
return 1;
}
}
fclose(proc);
return 0;
}
static int load_module(char const *path)
{
int fd;
if (check_module_loaded(WIFI_DRIVER_MODULE_NAME) > 0) {
ALOGE("Driver: %s already loaded", path);
return -1;
}
fd = open(path, O_RDONLY);
if (fd == -1) {
ALOGE("Failed to open %s - error: %s", path, strerror(errno));
return -errno;
}
// load the .ko image
if (finit_module(fd, "", 0) != 0) {
ALOGE("Failed to load module %s - error: %s", path, strerror(errno));
close(fd);
return -errno;
}
close(fd);
return 0;
}
int main(void)
{
char buf[8] = { '\0' };
FILE *fp;
size_t r;
int fd;
struct stat st;
if (stat(WIFI_DRIVER_MODULE_PATH, &st) == 0) {
ALOGD("Loading WiFi kernel module: %s", WIFI_DRIVER_MODULE_PATH);
load_module(WIFI_DRIVER_MODULE_PATH);
}
ALOGD("Trigger initcall of deferred modules\n");
fp = fopen(DEFERRED_INITCALLS, "r");
if (fp == NULL) {
ALOGE("Failed to open %s - error: %s\n",
DEFERRED_INITCALLS,
strerror(errno));
return -errno;
}
r = fread(buf, sizeof(buf), 1, fp);
fclose(fp);
ALOGV("%s=%s\n", DEFERRED_INITCALLS, buf);
return 0;
}
|
