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|
/*
* Copyright 2008, The Android Open Source 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.
*/
#include <stdlib.h>
#include <fcntl.h>
#include <errno.h>
#include <string.h>
#include <dirent.h>
#include <sys/socket.h>
#include <unistd.h>
#include <poll.h>
#ifdef USES_TI_MAC80211
#include <dirent.h>
#include <net/if.h>
#include <netlink/genl/genl.h>
#include <netlink/genl/family.h>
#include <netlink/genl/ctrl.h>
#include <netlink/msg.h>
#include <netlink/attr.h>
#include "nl80211.h"
#endif
#include "hardware_legacy/wifi.h"
#include "libwpa_client/wpa_ctrl.h"
#define LOG_TAG "WifiHW"
#include "cutils/log.h"
#include "cutils/memory.h"
#include "cutils/misc.h"
#include "cutils/properties.h"
#include "private/android_filesystem_config.h"
#ifdef HAVE_LIBC_SYSTEM_PROPERTIES
#define _REALLY_INCLUDE_SYS__SYSTEM_PROPERTIES_H_
#include <sys/_system_properties.h>
#endif
/* PRIMARY refers to the connection on the primary interface
* SECONDARY refers to an optional connection on a p2p interface
*
* For concurrency, we only support one active p2p connection and
* one active STA connection at a time
*/
#define PRIMARY 0
#define SECONDARY 1
#define MAX_CONNS 2
static struct wpa_ctrl *ctrl_conn[MAX_CONNS];
static struct wpa_ctrl *monitor_conn[MAX_CONNS];
/* socket pair used to exit from a blocking read */
static int exit_sockets[MAX_CONNS][2];
extern int do_dhcp();
extern int ifc_init();
extern void ifc_close();
extern char *dhcp_lasterror();
extern void get_dhcp_info();
extern int init_module(void *, unsigned long, const char *);
extern int delete_module(const char *, unsigned int);
static int wifi_mode = 0;
static char primary_iface[PROPERTY_VALUE_MAX];
// TODO: use new ANDROID_SOCKET mechanism, once support for multiple
// sockets is in
#ifdef USES_TI_MAC80211
#define P2P_INTERFACE "p2p0"
struct nl_sock *nl_soc;
struct nl_cache *nl_cache;
struct genl_family *nl80211;
#endif
#ifndef WIFI_DRIVER_MODULE_ARG
#define WIFI_DRIVER_MODULE_ARG ""
#endif
#ifndef WIFI_DRIVER_MODULE_AP_ARG
#define WIFI_DRIVER_MODULE_AP_ARG ""
#endif
#ifndef WIFI_FIRMWARE_LOADER
#define WIFI_FIRMWARE_LOADER ""
#endif
#define WIFI_TEST_INTERFACE "sta"
#ifndef WIFI_DRIVER_FW_PATH_STA
#define WIFI_DRIVER_FW_PATH_STA NULL
#endif
#ifndef WIFI_DRIVER_FW_PATH_AP
#define WIFI_DRIVER_FW_PATH_AP NULL
#endif
#ifndef WIFI_DRIVER_FW_PATH_P2P
#define WIFI_DRIVER_FW_PATH_P2P NULL
#endif
#ifdef WIFI_EXT_MODULE_NAME
static const char EXT_MODULE_NAME[] = WIFI_EXT_MODULE_NAME;
#ifdef WIFI_EXT_MODULE_ARG
static const char EXT_MODULE_ARG[] = WIFI_EXT_MODULE_ARG;
#else
static const char EXT_MODULE_ARG[] = "";
#endif
#endif
#ifdef WIFI_EXT_MODULE_PATH
static const char EXT_MODULE_PATH[] = WIFI_EXT_MODULE_PATH;
#endif
#ifndef WIFI_DRIVER_FW_PATH_PARAM
#define WIFI_DRIVER_FW_PATH_PARAM "/sys/module/wlan/parameters/fwpath"
#endif
static const char IFACE_DIR[] = "/data/system/wpa_supplicant";
#ifdef WIFI_DRIVER_MODULE_PATH
static const char DRIVER_MODULE_NAME[] = WIFI_DRIVER_MODULE_NAME;
static const char DRIVER_MODULE_TAG[] = WIFI_DRIVER_MODULE_NAME " ";
static const char DRIVER_MODULE_PATH[] = WIFI_DRIVER_MODULE_PATH;
static const char DRIVER_MODULE_ARG[] = WIFI_DRIVER_MODULE_ARG;
static const char DRIVER_MODULE_AP_ARG[] = WIFI_DRIVER_MODULE_AP_ARG;
#endif
static const char FIRMWARE_LOADER[] = WIFI_FIRMWARE_LOADER;
static const char DRIVER_PROP_NAME[] = "wlan.driver.status";
static const char SUPPLICANT_NAME[] = "wpa_supplicant";
static const char SUPP_PROP_NAME[] = "init.svc.wpa_supplicant";
static const char P2P_SUPPLICANT_NAME[] = "p2p_supplicant";
static const char P2P_PROP_NAME[] = "init.svc.p2p_supplicant";
static const char SUPP_CONFIG_TEMPLATE[]= "/system/etc/wifi/wpa_supplicant.conf";
static const char SUPP_CONFIG_FILE[] = "/data/misc/wifi/wpa_supplicant.conf";
static const char P2P_CONFIG_FILE[] = "/data/misc/wifi/p2p_supplicant.conf";
static const char CONTROL_IFACE_PATH[] = "/data/misc/wifi/sockets";
static const char MODULE_FILE[] = "/proc/modules";
static const char SUPP_ENTROPY_FILE[] = WIFI_ENTROPY_FILE;
static unsigned char dummy_key[21] = { 0x02, 0x11, 0xbe, 0x33, 0x43, 0x35,
0x68, 0x47, 0x84, 0x99, 0xa9, 0x2b,
0x1c, 0xd3, 0xee, 0xff, 0xf1, 0xe2,
0xf3, 0xf4, 0xf5 };
/* Is either SUPPLICANT_NAME or P2P_SUPPLICANT_NAME */
static char supplicant_name[PROPERTY_VALUE_MAX];
/* Is either SUPP_PROP_NAME or P2P_PROP_NAME */
static char supplicant_prop_name[PROPERTY_KEY_MAX];
static int is_primary_interface(const char *ifname)
{
//Treat NULL as primary interface to allow control
//on STA without an interface
if (ifname == NULL || !strncmp(ifname, primary_iface, strlen(primary_iface))) {
return 1;
}
return 0;
}
#ifdef SAMSUNG_WIFI
char* get_samsung_wifi_type()
{
char buf[10];
int fd = open("/data/.cid.info", O_RDONLY);
if (fd < 0)
return NULL;
if (read(fd, buf, sizeof(buf)) < 0) {
close(fd);
return NULL;
}
close(fd);
if (strncmp(buf, "murata", 6) == 0)
return "_murata";
if (strncmp(buf, "semcove", 7) == 0)
return "_semcove";
return NULL;
}
#endif
static int insmod(const char *filename, const char *args)
{
void *module;
unsigned int size;
int ret;
module = load_file(filename, &size);
if (!module)
return -1;
ret = init_module(module, size, args);
free(module);
return ret;
}
static int rmmod(const char *modname)
{
int ret = -1;
int maxtry = 10;
while (maxtry-- > 0) {
ret = delete_module(modname, O_NONBLOCK | O_EXCL);
if (ret < 0 && errno == EAGAIN)
usleep(500000);
else
break;
}
if (ret != 0)
ALOGD("Unable to unload driver module \"%s\": %s\n",
modname, strerror(errno));
return ret;
}
int do_dhcp_request(int *ipaddr, int *gateway, int *mask,
int *dns1, int *dns2, int *server, int *lease) {
/* For test driver, always report success */
if (strcmp(primary_iface, WIFI_TEST_INTERFACE) == 0)
return 0;
if (ifc_init() < 0)
return -1;
if (do_dhcp(primary_iface) < 0) {
ifc_close();
return -1;
}
ifc_close();
get_dhcp_info(ipaddr, gateway, mask, dns1, dns2, server, lease);
return 0;
}
const char *get_dhcp_error_string() {
return dhcp_lasterror();
}
int is_wifi_driver_loaded() {
char driver_status[PROPERTY_VALUE_MAX];
#ifdef WIFI_DRIVER_MODULE_PATH
FILE *proc;
char line[sizeof(DRIVER_MODULE_TAG)+10];
#endif
if (!property_get(DRIVER_PROP_NAME, driver_status, NULL)
|| strcmp(driver_status, "ok") != 0) {
return 0; /* driver not loaded */
}
#ifdef WIFI_DRIVER_MODULE_PATH
/*
* If the property says the driver is loaded, check to
* make sure that the property setting isn't just left
* over from a previous manual shutdown or a runtime
* crash.
*/
if ((proc = fopen(MODULE_FILE, "r")) == NULL) {
ALOGW("Could not open %s: %s", MODULE_FILE, strerror(errno));
property_set(DRIVER_PROP_NAME, "unloaded");
return 0;
}
while ((fgets(line, sizeof(line), proc)) != NULL) {
if (strncmp(line, DRIVER_MODULE_TAG, strlen(DRIVER_MODULE_TAG)) == 0) {
fclose(proc);
return 1;
}
}
fclose(proc);
property_set(DRIVER_PROP_NAME, "unloaded");
return 0;
#else
return 1;
#endif
}
int wifi_load_driver()
{
#ifdef WIFI_DRIVER_MODULE_PATH
char driver_status[PROPERTY_VALUE_MAX];
int count = 100; /* wait at most 20 seconds for completion */
char module_arg2[256];
#ifdef SAMSUNG_WIFI
char* type = get_samsung_wifi_type();
if (wifi_mode == 1) {
snprintf(module_arg2, sizeof(module_arg2), "%s%s", DRIVER_MODULE_AP_ARG, type == NULL ? "" : type);
} else {
snprintf(module_arg2, sizeof(module_arg2), "%s%s", DRIVER_MODULE_ARG, type == NULL ? "" : type);
}
if (insmod(DRIVER_MODULE_PATH, module_arg2) < 0) {
#else
property_set(DRIVER_PROP_NAME, "loading");
#ifdef WIFI_EXT_MODULE_PATH
if (insmod(EXT_MODULE_PATH, EXT_MODULE_ARG) < 0)
return -1;
usleep(200000);
#endif
if (insmod(DRIVER_MODULE_PATH, DRIVER_MODULE_ARG) < 0) {
#endif
#ifdef WIFI_EXT_MODULE_NAME
rmmod(EXT_MODULE_NAME);
#endif
return -1;
}
if (strcmp(FIRMWARE_LOADER,"") == 0) {
#ifdef WIFI_DRIVER_LOADER_DELAY
usleep(WIFI_DRIVER_LOADER_DELAY);
#endif
property_set(DRIVER_PROP_NAME, "ok");
}
else {
property_set("ctl.start", FIRMWARE_LOADER);
}
sched_yield();
while (count-- > 0) {
if (property_get(DRIVER_PROP_NAME, driver_status, NULL)) {
if (strcmp(driver_status, "ok") == 0)
return 0;
else if (strcmp(DRIVER_PROP_NAME, "failed") == 0) {
wifi_unload_driver();
return -1;
}
}
usleep(200000);
}
property_set(DRIVER_PROP_NAME, "timeout");
wifi_unload_driver();
return -1;
#else
property_set(DRIVER_PROP_NAME, "ok");
return 0;
#endif
}
int wifi_unload_driver()
{
usleep(200000); /* allow to finish interface down */
#ifdef WIFI_DRIVER_MODULE_PATH
if (rmmod(DRIVER_MODULE_NAME) == 0) {
int count = 20; /* wait at most 10 seconds for completion */
while (count-- > 0) {
if (!is_wifi_driver_loaded())
break;
usleep(500000);
}
usleep(500000); /* allow card removal */
if (count) {
#ifdef WIFI_EXT_MODULE_NAME
if (rmmod(EXT_MODULE_NAME) == 0)
#endif
return 0;
}
return -1;
} else
return -1;
#else
property_set(DRIVER_PROP_NAME, "unloaded");
return 0;
#endif
}
int ensure_entropy_file_exists()
{
int ret;
int destfd;
ret = access(SUPP_ENTROPY_FILE, R_OK|W_OK);
if ((ret == 0) || (errno == EACCES)) {
if ((ret != 0) &&
(chmod(SUPP_ENTROPY_FILE, S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP) != 0)) {
ALOGE("Cannot set RW to \"%s\": %s", SUPP_ENTROPY_FILE, strerror(errno));
return -1;
}
return 0;
}
destfd = TEMP_FAILURE_RETRY(open(SUPP_ENTROPY_FILE, O_CREAT|O_RDWR, 0660));
if (destfd < 0) {
ALOGE("Cannot create \"%s\": %s", SUPP_ENTROPY_FILE, strerror(errno));
return -1;
}
if (TEMP_FAILURE_RETRY(write(destfd, dummy_key, sizeof(dummy_key))) != sizeof(dummy_key)) {
ALOGE("Error writing \"%s\": %s", SUPP_ENTROPY_FILE, strerror(errno));
close(destfd);
return -1;
}
close(destfd);
/* chmod is needed because open() didn't set permisions properly */
if (chmod(SUPP_ENTROPY_FILE, 0660) < 0) {
ALOGE("Error changing permissions of %s to 0660: %s",
SUPP_ENTROPY_FILE, strerror(errno));
unlink(SUPP_ENTROPY_FILE);
return -1;
}
if (chown(SUPP_ENTROPY_FILE, AID_SYSTEM, AID_WIFI) < 0) {
ALOGE("Error changing group ownership of %s to %d: %s",
SUPP_ENTROPY_FILE, AID_WIFI, strerror(errno));
unlink(SUPP_ENTROPY_FILE);
return -1;
}
return 0;
}
int update_ctrl_interface(const char *config_file) {
int srcfd, destfd;
int nread;
char ifc[PROPERTY_VALUE_MAX];
char *pbuf;
char *sptr;
struct stat sb;
if (stat(config_file, &sb) != 0)
return -1;
pbuf = malloc(sb.st_size + PROPERTY_VALUE_MAX);
if (!pbuf)
return 0;
srcfd = TEMP_FAILURE_RETRY(open(config_file, O_RDONLY));
if (srcfd < 0) {
ALOGE("Cannot open \"%s\": %s", config_file, strerror(errno));
free(pbuf);
return 0;
}
nread = TEMP_FAILURE_RETRY(read(srcfd, pbuf, sb.st_size));
close(srcfd);
if (nread < 0) {
ALOGE("Cannot read \"%s\": %s", config_file, strerror(errno));
free(pbuf);
return 0;
}
if (!strcmp(config_file, SUPP_CONFIG_FILE)) {
property_get("wifi.interface", ifc, WIFI_TEST_INTERFACE);
} else {
strcpy(ifc, CONTROL_IFACE_PATH);
}
/*
* if there is a "ctrl_interface=<value>" entry, re-write it ONLY if it is
* NOT a directory. The non-directory value option is an Android add-on
* that allows the control interface to be exchanged through an environment
* variable (initialized by the "init" program when it starts a service
* with a "socket" option).
*
* The <value> is deemed to be a directory if the "DIR=" form is used or
* the value begins with "/".
*/
if ((sptr = strstr(pbuf, "ctrl_interface=")) &&
(!strstr(pbuf, "ctrl_interface=DIR=")) &&
(!strstr(pbuf, "ctrl_interface=/"))) {
char *iptr = sptr + strlen("ctrl_interface=");
int ilen = 0;
int mlen = strlen(ifc);
int nwrite;
if (strncmp(ifc, iptr, mlen) != 0) {
ALOGE("ctrl_interface != %s", ifc);
while (((ilen + (iptr - pbuf)) < nread) && (iptr[ilen] != '\n'))
ilen++;
mlen = ((ilen >= mlen) ? ilen : mlen) + 1;
memmove(iptr + mlen, iptr + ilen + 1, nread - (iptr + ilen + 1 - pbuf));
memset(iptr, '\n', mlen);
memcpy(iptr, ifc, strlen(ifc));
destfd = TEMP_FAILURE_RETRY(open(config_file, O_RDWR, 0660));
if (destfd < 0) {
ALOGE("Cannot update \"%s\": %s", config_file, strerror(errno));
free(pbuf);
return -1;
}
TEMP_FAILURE_RETRY(write(destfd, pbuf, nread + mlen - ilen -1));
close(destfd);
}
}
free(pbuf);
return 0;
}
int ensure_config_file_exists(const char *config_file)
{
char buf[2048];
int srcfd, destfd;
struct stat sb;
int nread;
int ret;
ret = access(config_file, R_OK|W_OK);
if ((ret == 0) || (errno == EACCES)) {
if ((ret != 0) &&
(chmod(config_file, S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP) != 0)) {
ALOGE("Cannot set RW to \"%s\": %s", config_file, strerror(errno));
return -1;
}
/* return if filesize is at least 10 bytes */
if (stat(config_file, &sb) == 0 && sb.st_size > 10) {
return update_ctrl_interface(config_file);
}
} else if (errno != ENOENT) {
ALOGE("Cannot access \"%s\": %s", config_file, strerror(errno));
return -1;
}
srcfd = TEMP_FAILURE_RETRY(open(SUPP_CONFIG_TEMPLATE, O_RDONLY));
if (srcfd < 0) {
ALOGE("Cannot open \"%s\": %s", SUPP_CONFIG_TEMPLATE, strerror(errno));
return -1;
}
destfd = TEMP_FAILURE_RETRY(open(config_file, O_CREAT|O_RDWR, 0660));
if (destfd < 0) {
close(srcfd);
ALOGE("Cannot create \"%s\": %s", config_file, strerror(errno));
return -1;
}
while ((nread = TEMP_FAILURE_RETRY(read(srcfd, buf, sizeof(buf)))) != 0) {
if (nread < 0) {
ALOGE("Error reading \"%s\": %s", SUPP_CONFIG_TEMPLATE, strerror(errno));
close(srcfd);
close(destfd);
unlink(config_file);
return -1;
}
TEMP_FAILURE_RETRY(write(destfd, buf, nread));
}
close(destfd);
close(srcfd);
/* chmod is needed because open() didn't set permisions properly */
if (chmod(config_file, 0660) < 0) {
ALOGE("Error changing permissions of %s to 0660: %s",
config_file, strerror(errno));
unlink(config_file);
return -1;
}
if (chown(config_file, AID_SYSTEM, AID_WIFI) < 0) {
ALOGE("Error changing group ownership of %s to %d: %s",
config_file, AID_WIFI, strerror(errno));
unlink(config_file);
return -1;
}
return update_ctrl_interface(config_file);
}
/**
* wifi_wpa_ctrl_cleanup() - Delete any local UNIX domain socket files that
* may be left over from clients that were previously connected to
* wpa_supplicant. This keeps these files from being orphaned in the
* event of crashes that prevented them from being removed as part
* of the normal orderly shutdown.
*/
void wifi_wpa_ctrl_cleanup(void)
{
DIR *dir;
struct dirent entry;
struct dirent *result;
size_t dirnamelen;
size_t maxcopy;
char pathname[PATH_MAX];
char *namep;
char *local_socket_dir = CONFIG_CTRL_IFACE_CLIENT_DIR;
char *local_socket_prefix = CONFIG_CTRL_IFACE_CLIENT_PREFIX;
if ((dir = opendir(local_socket_dir)) == NULL)
return;
dirnamelen = (size_t)snprintf(pathname, sizeof(pathname), "%s/", local_socket_dir);
if (dirnamelen >= sizeof(pathname)) {
closedir(dir);
return;
}
namep = pathname + dirnamelen;
maxcopy = PATH_MAX - dirnamelen;
while (readdir_r(dir, &entry, &result) == 0 && result != NULL) {
if (strncmp(entry.d_name, local_socket_prefix, strlen(local_socket_prefix)) == 0) {
if (strlcpy(namep, entry.d_name, maxcopy) < maxcopy) {
unlink(pathname);
}
}
}
closedir(dir);
}
#ifdef USES_TI_MAC80211
static int init_nl()
{
int err;
nl_soc = nl_socket_alloc();
if (!nl_soc) {
ALOGE("Failed to allocate netlink socket.");
return -ENOMEM;
}
if (genl_connect(nl_soc)) {
ALOGE("Failed to connect to generic netlink.");
err = -ENOLINK;
goto out_handle_destroy;
}
genl_ctrl_alloc_cache(nl_soc, &nl_cache);
if (!nl_cache) {
ALOGE("Failed to allocate generic netlink cache.");
err = -ENOMEM;
goto out_handle_destroy;
}
nl80211 = genl_ctrl_search_by_name(nl_cache, "nl80211");
if (!nl80211) {
ALOGE("nl80211 not found.");
err = -ENOENT;
goto out_cache_free;
}
return 0;
out_cache_free:
nl_cache_free(nl_cache);
out_handle_destroy:
nl_socket_free(nl_soc);
return err;
}
static void deinit_nl()
{
genl_family_put(nl80211);
nl_cache_free(nl_cache);
nl_socket_free(nl_soc);
}
// ignore the "." and ".." entries
static int dir_filter(const struct dirent *name)
{
if (0 == strcmp("..", name->d_name) ||
0 == strcmp(".", name->d_name))
return 0;
return 1;
}
// lookup the only active phy
int phy_lookup()
{
char buf[200];
int fd, pos;
struct dirent **namelist;
int n, i;
n = scandir("/sys/class/ieee80211", &namelist, dir_filter,
(int (*)(const struct dirent**, const struct dirent**))alphasort);
if (n != 1) {
ALOGE("unexpected - found %d phys in /sys/class/ieee80211", n);
for (i = 0; i < n; i++)
free(namelist[i]);
free(namelist);
return -1;
}
snprintf(buf, sizeof(buf), "/sys/class/ieee80211/%s/index",
namelist[0]->d_name);
free(namelist[0]);
free(namelist);
fd = open(buf, O_RDONLY);
if (fd < 0)
return -1;
pos = read(fd, buf, sizeof(buf) - 1);
if (pos < 0) {
close(fd);
return -1;
}
buf[pos] = '\0';
close(fd);
return atoi(buf);
}
int nl_error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg)
{
int *ret = (int *)arg;
*ret = err->error;
return NL_STOP;
}
int nl_finish_handler(struct nl_msg *msg, void *arg)
{
int *ret = (int *)arg;
*ret = 0;
return NL_SKIP;
}
int nl_ack_handler(struct nl_msg *msg, void *arg)
{
int *ret = (int *)arg;
*ret = 0;
return NL_STOP;
}
static int execute_nl_interface_cmd(const char *iface,
enum nl80211_iftype type,
uint8_t cmd)
{
struct nl_cb *cb;
struct nl_msg *msg;
int devidx = 0;
int err;
int add_interface = (cmd == NL80211_CMD_NEW_INTERFACE);
if (add_interface) {
devidx = phy_lookup();
} else {
devidx = if_nametoindex(iface);
if (devidx == 0) {
ALOGE("failed to translate ifname to idx");
return -errno;
}
}
msg = nlmsg_alloc();
if (!msg) {
ALOGE("failed to allocate netlink message");
return 2;
}
cb = nl_cb_alloc(NL_CB_DEFAULT);
if (!cb) {
ALOGE("failed to allocate netlink callbacks");
err = 2;
goto out_free_msg;
}
genlmsg_put(msg, 0, 0, genl_family_get_id(nl80211), 0, 0, cmd, 0);
if (add_interface) {
NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, devidx);
} else {
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, devidx);
}
if (add_interface) {
NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, iface);
NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, type);
}
err = nl_send_auto_complete(nl_soc, msg);
if (err < 0)
goto out;
err = 1;
nl_cb_err(cb, NL_CB_CUSTOM, nl_error_handler, &err);
nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, nl_finish_handler, &err);
nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, nl_ack_handler, &err);
while (err > 0)
nl_recvmsgs(nl_soc, cb);
out:
nl_cb_put(cb);
out_free_msg:
nlmsg_free(msg);
return err;
nla_put_failure:
ALOGW("building message failed");
return 2;
}
int add_remove_p2p_interface(int add)
{
int ret;
ret = init_nl();
if (ret != 0)
return ret;
if (add) {
ret = execute_nl_interface_cmd(P2P_INTERFACE, NL80211_IFTYPE_STATION,
NL80211_CMD_NEW_INTERFACE);
if (ret != 0) {
ALOGE("could not add P2P interface: %d", ret);
goto cleanup;
}
} else {
ret = execute_nl_interface_cmd(P2P_INTERFACE, NL80211_IFTYPE_STATION,
NL80211_CMD_DEL_INTERFACE);
if (ret != 0) {
ALOGE("could not remove P2P interface: %d", ret);
goto cleanup;
}
}
ALOGD("added/removed p2p interface. add: %d", add);
cleanup:
deinit_nl();
return ret;
}
#endif /* USES_TI_MAC80211 */
int wifi_start_supplicant(int p2p_supported)
{
char supp_status[PROPERTY_VALUE_MAX] = {'\0'};
int count = 200; /* wait at most 20 seconds for completion */
#ifdef HAVE_LIBC_SYSTEM_PROPERTIES
const prop_info *pi;
unsigned serial = 0, i;
#endif
if (p2p_supported) {
strcpy(supplicant_name, P2P_SUPPLICANT_NAME);
strcpy(supplicant_prop_name, P2P_PROP_NAME);
/* Ensure p2p config file is created */
if (ensure_config_file_exists(P2P_CONFIG_FILE) < 0) {
ALOGE("Failed to create a p2p config file");
return -1;
}
} else {
strcpy(supplicant_name, SUPPLICANT_NAME);
strcpy(supplicant_prop_name, SUPP_PROP_NAME);
}
/* Check whether already running */
if (property_get(supplicant_name, supp_status, NULL)
&& strcmp(supp_status, "running") == 0) {
return 0;
}
/* Before starting the daemon, make sure its config file exists */
if (ensure_config_file_exists(SUPP_CONFIG_FILE) < 0) {
ALOGE("Wi-Fi will not be enabled");
return -1;
}
if (ensure_entropy_file_exists() < 0) {
ALOGE("Wi-Fi entropy file was not created");
}
#ifdef USES_TI_MAC80211
if (p2p_supported && add_remove_p2p_interface(1) < 0) {
ALOGE("Wi-Fi - could not create p2p interface");
return -1;
}
#endif
/* Clear out any stale socket files that might be left over. */
wifi_wpa_ctrl_cleanup();
/* Reset sockets used for exiting from hung state */
for (i=0; i<MAX_CONNS; i++) {
exit_sockets[i][0] = exit_sockets[i][1] = -1;
}
#ifdef HAVE_LIBC_SYSTEM_PROPERTIES
/*
* Get a reference to the status property, so we can distinguish
* the case where it goes stopped => running => stopped (i.e.,
* it start up, but fails right away) from the case in which
* it starts in the stopped state and never manages to start
* running at all.
*/
pi = __system_property_find(supplicant_prop_name);
if (pi != NULL) {
serial = pi->serial;
}
#endif
property_get("wifi.interface", primary_iface, WIFI_TEST_INTERFACE);
property_set("ctl.start", supplicant_name);
sched_yield();
while (count-- > 0) {
#ifdef HAVE_LIBC_SYSTEM_PROPERTIES
if (pi == NULL) {
pi = __system_property_find(supplicant_prop_name);
}
if (pi != NULL) {
__system_property_read(pi, NULL, supp_status);
if (strcmp(supp_status, "running") == 0) {
return 0;
} else if (pi->serial != serial &&
strcmp(supp_status, "stopped") == 0) {
return -1;
}
}
#else
if (property_get(supplicant_prop_name, supp_status, NULL)) {
if (strcmp(supp_status, "running") == 0)
return 0;
}
#endif
usleep(100000);
}
return -1;
}
int wifi_stop_supplicant(int p2p_supported)
{
char supp_status[PROPERTY_VALUE_MAX] = {'\0'};
int count = 50; /* wait at most 5 seconds for completion */
if (p2p_supported) {
strcpy(supplicant_name, P2P_SUPPLICANT_NAME);
strcpy(supplicant_prop_name, P2P_PROP_NAME);
} else {
strcpy(supplicant_name, SUPPLICANT_NAME);
strcpy(supplicant_prop_name, SUPP_PROP_NAME);
}
/* Check whether supplicant already stopped */
if (property_get(supplicant_prop_name, supp_status, NULL)
&& strcmp(supp_status, "stopped") == 0) {
return 0;
}
property_set("ctl.stop", supplicant_name);
sched_yield();
while (count-- > 0) {
if (property_get(supplicant_prop_name, supp_status, NULL)) {
if (strcmp(supp_status, "stopped") == 0)
return 0;
}
usleep(100000);
}
ALOGE("Failed to stop supplicant");
return -1;
}
int wifi_connect_on_socket_path(int index, const char *path)
{
char supp_status[PROPERTY_VALUE_MAX] = {'\0'};
/* Make sure supplicant is running */
if (!property_get(supplicant_prop_name, supp_status, NULL)
|| strcmp(supp_status, "running") != 0) {
ALOGE("Supplicant not running, cannot connect");
return -1;
}
ctrl_conn[index] = wpa_ctrl_open(path);
if (ctrl_conn[index] == NULL) {
ALOGE("Unable to open connection to supplicant on \"%s\": %s",
path, strerror(errno));
return -1;
}
monitor_conn[index] = wpa_ctrl_open(path);
if (monitor_conn[index] == NULL) {
wpa_ctrl_close(ctrl_conn[index]);
ctrl_conn[index] = NULL;
return -1;
}
if (wpa_ctrl_attach(monitor_conn[index]) != 0) {
wpa_ctrl_close(monitor_conn[index]);
wpa_ctrl_close(ctrl_conn[index]);
ctrl_conn[index] = monitor_conn[index] = NULL;
return -1;
}
if (socketpair(AF_UNIX, SOCK_STREAM, 0, exit_sockets[index]) == -1) {
wpa_ctrl_close(monitor_conn[index]);
wpa_ctrl_close(ctrl_conn[index]);
ctrl_conn[index] = monitor_conn[index] = NULL;
return -1;
}
return 0;
}
/* Establishes the control and monitor socket connections on the interface */
int wifi_connect_to_supplicant(const char *ifname)
{
char path[256];
if (is_primary_interface(ifname)) {
if (access(IFACE_DIR, F_OK) == 0) {
snprintf(path, sizeof(path), "%s/%s", IFACE_DIR, primary_iface);
} else {
strlcpy(path, primary_iface, sizeof(path));
}
return wifi_connect_on_socket_path(PRIMARY, path);
} else {
sprintf(path, "%s/%s", CONTROL_IFACE_PATH, ifname);
return wifi_connect_on_socket_path(SECONDARY, path);
}
}
int wifi_send_command(int index, const char *cmd, char *reply, size_t *reply_len)
{
int ret;
if (ctrl_conn[index] == NULL) {
ALOGV("Not connected to wpa_supplicant - \"%s\" command dropped.\n", cmd);
return -1;
}
ret = wpa_ctrl_request(ctrl_conn[index], cmd, strlen(cmd), reply, reply_len, NULL);
if (ret == -2) {
ALOGD("'%s' command timed out.\n", cmd);
/* unblocks the monitor receive socket for termination */
TEMP_FAILURE_RETRY(write(exit_sockets[index][0], "T", 1));
return -2;
} else if (ret < 0 || strncmp(reply, "FAIL", 4) == 0) {
return -1;
}
if (strncmp(cmd, "PING", 4) == 0) {
reply[*reply_len] = '\0';
}
return 0;
}
int wifi_ctrl_recv(int index, char *reply, size_t *reply_len)
{
int res;
int ctrlfd = wpa_ctrl_get_fd(monitor_conn[index]);
struct pollfd rfds[2];
memset(rfds, 0, 2 * sizeof(struct pollfd));
rfds[0].fd = ctrlfd;
rfds[0].events |= POLLIN;
rfds[1].fd = exit_sockets[index][1];
rfds[1].events |= POLLIN;
res = TEMP_FAILURE_RETRY(poll(rfds, 2, -1));
if (res < 0) {
ALOGE("Error poll = %d", res);
return res;
}
if (rfds[0].revents & POLLIN) {
return wpa_ctrl_recv(monitor_conn[index], reply, reply_len);
} else if (rfds[1].revents & POLLIN) {
/* Close only the p2p sockets on receive side
* see wifi_close_supplicant_connection()
*/
if (index == SECONDARY) {
ALOGD("close sockets %d", index);
wifi_close_sockets(index);
}
}
return -2;
}
int wifi_wait_on_socket(int index, char *buf, size_t buflen)
{
size_t nread = buflen - 1;
int fd;
fd_set rfds;
int result;
struct timeval tval;
struct timeval *tptr;
if (monitor_conn[index] == NULL) {
ALOGD("Connection closed\n");
strncpy(buf, WPA_EVENT_TERMINATING " - connection closed", buflen-1);
buf[buflen-1] = '\0';
return strlen(buf);
}
result = wifi_ctrl_recv(index, buf, &nread);
/* Terminate reception on exit socket */
if (result == -2) {
strncpy(buf, WPA_EVENT_TERMINATING " - connection closed", buflen-1);
buf[buflen-1] = '\0';
return strlen(buf);
}
if (result < 0) {
ALOGD("wifi_ctrl_recv failed: %s\n", strerror(errno));
strncpy(buf, WPA_EVENT_TERMINATING " - recv error", buflen-1);
buf[buflen-1] = '\0';
return strlen(buf);
}
buf[nread] = '\0';
/* Check for EOF on the socket */
if (result == 0 && nread == 0) {
/* Fabricate an event to pass up */
ALOGD("Received EOF on supplicant socket\n");
strncpy(buf, WPA_EVENT_TERMINATING " - signal 0 received", buflen-1);
buf[buflen-1] = '\0';
return strlen(buf);
}
/*
* Events strings are in the format
*
* <N>CTRL-EVENT-XXX
*
* where N is the message level in numerical form (0=VERBOSE, 1=DEBUG,
* etc.) and XXX is the event name. The level information is not useful
* to us, so strip it off.
*/
if (buf[0] == '<') {
char *match = strchr(buf, '>');
if (match != NULL) {
nread -= (match+1-buf);
memmove(buf, match+1, nread+1);
}
}
return nread;
}
int wifi_wait_for_event(const char *ifname, char *buf, size_t buflen)
{
if (is_primary_interface(ifname)) {
return wifi_wait_on_socket(PRIMARY, buf, buflen);
} else {
return wifi_wait_on_socket(SECONDARY, buf, buflen);
}
}
void wifi_close_sockets(int index)
{
if (ctrl_conn[index] != NULL) {
wpa_ctrl_close(ctrl_conn[index]);
ctrl_conn[index] = NULL;
}
if (monitor_conn[index] != NULL) {
wpa_ctrl_close(monitor_conn[index]);
monitor_conn[index] = NULL;
}
if (exit_sockets[index][0] >= 0) {
close(exit_sockets[index][0]);
exit_sockets[index][0] = -1;
}
if (exit_sockets[index][1] >= 0) {
close(exit_sockets[index][1]);
exit_sockets[index][1] = -1;
}
}
void wifi_close_supplicant_connection(const char *ifname)
{
char supp_status[PROPERTY_VALUE_MAX] = {'\0'};
int count = 50; /* wait at most 5 seconds to ensure init has stopped stupplicant */
if (is_primary_interface(ifname)) {
wifi_close_sockets(PRIMARY);
} else {
/* p2p socket termination needs unblocking the monitor socket
* STA connection does not need it since supplicant gets shutdown
*/
TEMP_FAILURE_RETRY(write(exit_sockets[SECONDARY][0], "T", 1));
/* p2p sockets are closed after the monitor thread
* receives the terminate on the exit socket
*/
return;
}
while (count-- > 0) {
if (property_get(supplicant_prop_name, supp_status, NULL)) {
if (strcmp(supp_status, "stopped") == 0)
return;
}
usleep(100000);
}
}
int wifi_command(const char *ifname, const char *command, char *reply, size_t *reply_len)
{
if (is_primary_interface(ifname)) {
return wifi_send_command(PRIMARY, command, reply, reply_len);
} else {
return wifi_send_command(SECONDARY, command, reply, reply_len);
}
}
const char *wifi_get_fw_path(int fw_type)
{
switch (fw_type) {
case WIFI_GET_FW_PATH_STA:
return WIFI_DRIVER_FW_PATH_STA;
case WIFI_GET_FW_PATH_AP:
return WIFI_DRIVER_FW_PATH_AP;
case WIFI_GET_FW_PATH_P2P:
return WIFI_DRIVER_FW_PATH_P2P;
}
return NULL;
}
int wifi_change_fw_path(const char *fwpath)
{
int len;
int fd;
int ret = 0;
if (!fwpath)
return ret;
fd = TEMP_FAILURE_RETRY(open(WIFI_DRIVER_FW_PATH_PARAM, O_WRONLY));
if (fd < 0) {
ALOGE("Failed to open wlan fw path param (%s)", strerror(errno));
return -1;
}
len = strlen(fwpath) + 1;
if (TEMP_FAILURE_RETRY(write(fd, fwpath, len)) != len) {
ALOGE("Failed to write wlan fw path param (%s)", strerror(errno));
ret = -1;
}
close(fd);
return ret;
}
int wifi_set_mode(int mode) {
wifi_mode = mode;
return 0;
}
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