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hardware_samsung/macloader/macloader.c

280 lines
7.0 KiB

/*
* Copyright (C) 2012, The CyanogenMod Project
* Daniel Hillenbrand <codeworkx@cyanogenmod.com>
* Marco Hillenbrand <marco.hillenbrand@googlemail.com>
* Copyright (C) 2017, The LineageOS Project
*
* 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 "macloader"
#define LOG_NDEBUG 0
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <pwd.h>
#include <errno.h>
#include <cutils/log.h>
#include <samsung_macloader.h>
#include "macaddr_mappings.h"
static int wifi_change_nvram_calibration(const char *nvram_file,
const char *type)
{
int len;
int fd = -1;
int ret = 0;
struct stat sb;
char nvram_str[1024] = { 0 };
if (nvram_file == NULL || type == NULL) {
ret = -1;
goto out;
}
ret = stat(nvram_file, &sb);
if (ret != 0) {
ALOGE("Failed to check for NVRAM calibration file '%s' - error: %s",
nvram_file,
strerror(errno));
ret = -1;
goto out;
}
ALOGD("Using NVRAM calibration file: %s\n", nvram_file);
fd = TEMP_FAILURE_RETRY(open(WIFI_DRIVER_NVRAM_PATH_PARAM, O_WRONLY));
if (fd < 0) {
ALOGE("Failed to open wifi nvram config path %s - error: %s",
WIFI_DRIVER_NVRAM_PATH_PARAM, strerror(errno));
ret = -1;
goto out;
}
len = strlen(nvram_file) + 1;
if (TEMP_FAILURE_RETRY(write(fd, nvram_file, len)) != len) {
ALOGE("Failed to write to wifi config path %s - error: %s",
WIFI_DRIVER_NVRAM_PATH_PARAM, strerror(errno));
ret = -1;
goto out;
}
snprintf(nvram_str, sizeof(nvram_str), "%s_%s",
nvram_file, type);
ALOGD("Changing NVRAM calibration file for %s chipset\n", type);
ret = stat(nvram_str, &sb);
if (ret != 0) {
ALOGW("NVRAM calibration file '%s' doesn't exist", nvram_str);
/*
* We were able to write the default calibration file. So
* continue here without returning an error.
*/
ret = 0;
goto out;
}
len = strlen(nvram_str) + 1;
if (TEMP_FAILURE_RETRY(write(fd, nvram_str, len)) != len) {
ALOGW("Failed to write to wifi config path %s - error: %s",
WIFI_DRIVER_NVRAM_PATH_PARAM, strerror(errno));
/*
* We were able to write the default calibration file. So
* continue here without returning an error.
*/
ret = 0;
goto out;
}
ALOGD("NVRAM calibration file set to '%s'\n", nvram_str);
out:
if (fd != -1) {
close(fd);
}
return ret;
}
static int classify_macaddr_half(char const *macaddr_half)
{
int type = NONE;
unsigned int i, j;
char const *macaddr;
for (i = 0; i < TYPE_MAX; i++) {
for (j = 0; j < MAX_RANGE_ENTRIES; j++) {
macaddr = all_ranges[i]->macaddrs[j];
if (macaddr[0] == '\0') {
break;
}
// macaddr_half is guaranteed to be null terminated
if (strcasecmp(macaddr_half, macaddr) == 0) {
type = all_ranges[i]->type;
goto exit;
}
}
}
exit:
if (type != NONE) {
ALOGV("Found CID type: %d", type);
}
return type;
}
int main() {
FILE* file = NULL;
FILE* cidfile = NULL;
char* str;
char mac_addr_half[RANGE_ENTRY_LEN + 1] = {0};
int ret = 0;
int amode;
enum Type type = NONE;
/* open mac addr file */
file = fopen(MACADDR_PATH, "r");
if (file == 0) {
fprintf(stderr, "open(%s) failed\n", MACADDR_PATH);
ALOGE("Can't open %s\n", MACADDR_PATH);
ret = -1;
goto out;
}
/* get and compare mac addr */
str = fgets(mac_addr_half, RANGE_ENTRY_LEN, file);
fclose(file);
if (str == 0) {
fprintf(stderr, "fgets() from file %s failed\n", MACADDR_PATH);
ALOGE("Can't read from %s\n", MACADDR_PATH);
ret = -1;
goto out;
}
type = classify_macaddr_half(mac_addr_half);
if (type == NONE) {
/* delete cid file if no specific type */
ALOGD("Deleting file %s\n", CID_PATH);
remove(CID_PATH);
ret = 0;
goto out;
}
const char *nvram_file;
const char *type_str;
struct passwd *pwd;
int fd;
switch(type) {
case MURATA:
type_str = "murata";
break;
case SEMCOSH:
type_str = "semcosh";
break;
case SEMCO3RD:
type_str = "semco3rd";
break;
case SEMCO:
type_str = "semco";
break;
case WISOL:
type_str = "wisol";
break;
default:
ALOGE("Unknown CID type: %d", type);
ret = -1;
goto out;
}
ALOGI("Settting wifi type to %s in %s\n", type_str, CID_PATH);
/* open cid file */
cidfile = fopen(CID_PATH, "w");
if (cidfile == NULL) {
fprintf(stderr,
"open(%s) failed: %s\n",
CID_PATH,
strerror(errno));
ALOGE("Can't open %s: %s\n", CID_PATH, strerror(errno));
ret = -1;
goto out;
}
ret = fputs(type_str, cidfile);
if (ret != 0) {
ALOGE("Can't write to %s\n", CID_PATH);
ret = -1;
goto out;
}
/* Change permissions of cid file */
ALOGD("Change permissions of %s\n", CID_PATH);
fd = fileno(cidfile);
amode = S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH;
ret = fchmod(fd, amode);
if (ret != 0) {
ALOGE("Can't set permissions on %s - %s\n",
CID_PATH, strerror(errno));
ret = -1;
goto out;
}
pwd = getpwnam("system");
if (pwd == NULL) {
ALOGE("Failed to find 'system' user - %s\n",
strerror(errno));
ret = -1;
goto out;
}
ret = fchown(fd, pwd->pw_uid, pwd->pw_gid);
if (ret != 0) {
ALOGE("Failed to change owner of %s - %s\n",
CID_PATH, strerror(errno));
ret = -1;
goto out;
}
nvram_file = WIFI_DRIVER_NVRAM_PATH;
if (nvram_file != NULL) {
ret = wifi_change_nvram_calibration(nvram_file, type_str);
if (ret != 0) {
ret = -1;
goto out;
}
}
out:
if (file) {
fclose(file);
}
if (cidfile) {
fclose(cidfile);
}
if (ret < 0) {
ALOGE("Macloader error return code: %d", ret);
}
return ret;
}