+++ /dev/null
-/*
- * 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 "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
-
-static struct wpa_ctrl *ctrl_conn;
-static struct wpa_ctrl *monitor_conn;
-
-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 char iface[PROPERTY_VALUE_MAX];
-// TODO: use new ANDROID_SOCKET mechanism, once support for multiple
-// sockets is in
-
-static const char IFACE_DIR[] = "/data/system/wpa_supplicant";
-static const char DRIVER_MODULE_NAME[] = "wlan";
-static const char DRIVER_MODULE_TAG[] = "wlan ";
-static const char DRIVER_MODULE_PATH[] = "/system/lib/modules/wlan.ko";
-static const char FIRMWARE_LOADER[] = "wlan_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 SUPP_CONFIG_TEMPLATE[]= "/system/etc/wifi/wpa_supplicant.conf";
-static const char SUPP_CONFIG_FILE[] = "/data/misc/wifi/wpa_supplicant.conf";
-static const char MODULE_FILE[] = "/proc/modules";
-
-static int insmod(const char *filename)
-{
- void *module;
- unsigned int size;
- int ret;
-
- module = load_file(filename, &size);
- if (!module)
- return -1;
-
- ret = init_module(module, size, "");
-
- 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)
- LOGD("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(iface, "sta") == 0)
- return 0;
-
- if (ifc_init() < 0)
- return -1;
-
- if (do_dhcp(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();
-}
-
-static int check_driver_loaded() {
- char driver_status[PROPERTY_VALUE_MAX];
- FILE *proc;
- char line[sizeof(DRIVER_MODULE_TAG)+10];
-
- if (!property_get(DRIVER_PROP_NAME, driver_status, NULL)
- || strcmp(driver_status, "ok") != 0) {
- return 0; /* driver not loaded */
- }
- /*
- * 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) {
- LOGW("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;
-}
-
-int wifi_load_driver()
-{
- char driver_status[PROPERTY_VALUE_MAX];
- int count = 100; /* wait at most 20 seconds for completion */
-
- if (check_driver_loaded()) {
- return 0;
- }
-
- if (insmod(DRIVER_MODULE_PATH) < 0)
- return -1;
-
- 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)
- return -1;
- }
- usleep(200000);
- }
- property_set(DRIVER_PROP_NAME, "timeout");
- return -1;
-}
-
-int wifi_unload_driver()
-{
- int count = 20; /* wait at most 10 seconds for completion */
-
- if (rmmod(DRIVER_MODULE_NAME) == 0) {
- while (count-- > 0) {
- if (!check_driver_loaded())
- break;
- usleep(500000);
- }
- if (count) {
- return 0;
- }
- return -1;
- } else
- return -1;
-}
-
-int ensure_config_file_exists()
-{
- char buf[2048];
- int srcfd, destfd;
- int nread;
-
- if (access(SUPP_CONFIG_FILE, R_OK|W_OK) == 0) {
- return 0;
- } else if (errno != ENOENT) {
- LOGE("Cannot access \"%s\": %s", SUPP_CONFIG_FILE, strerror(errno));
- return -1;
- }
-
- srcfd = open(SUPP_CONFIG_TEMPLATE, O_RDONLY);
- if (srcfd < 0) {
- LOGE("Cannot open \"%s\": %s", SUPP_CONFIG_TEMPLATE, strerror(errno));
- return -1;
- }
-
- destfd = open(SUPP_CONFIG_FILE, O_CREAT|O_WRONLY, 0660);
- if (destfd < 0) {
- close(srcfd);
- LOGE("Cannot create \"%s\": %s", SUPP_CONFIG_FILE, strerror(errno));
- return -1;
- }
-
- while ((nread = read(srcfd, buf, sizeof(buf))) != 0) {
- if (nread < 0) {
- LOGE("Error reading \"%s\": %s", SUPP_CONFIG_TEMPLATE, strerror(errno));
- close(srcfd);
- close(destfd);
- unlink(SUPP_CONFIG_FILE);
- return -1;
- }
- write(destfd, buf, nread);
- }
-
- close(destfd);
- close(srcfd);
-
- if (chown(SUPP_CONFIG_FILE, AID_SYSTEM, AID_WIFI) < 0) {
- LOGE("Error changing group ownership of %s to %d: %s",
- SUPP_CONFIG_FILE, AID_WIFI, strerror(errno));
- unlink(SUPP_CONFIG_FILE);
- return -1;
- }
- return 0;
-}
-
-int wifi_start_supplicant()
-{
- 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;
-#endif
-
- /* Check whether already running */
- if (property_get(SUPP_PROP_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() < 0) {
- LOGE("Wi-Fi will not be enabled");
- return -1;
- }
-
- /* Clear out any stale socket files that might be left over. */
- wpa_ctrl_cleanup();
-
-#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(SUPP_PROP_NAME);
- if (pi != NULL) {
- serial = pi->serial;
- }
-#endif
- property_set("ctl.start", SUPPLICANT_NAME);
- sched_yield();
-
- while (count-- > 0) {
- #ifdef HAVE_LIBC_SYSTEM_PROPERTIES
- if (pi == NULL) {
- pi = __system_property_find(SUPP_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(SUPP_PROP_NAME, supp_status, NULL)) {
- if (strcmp(supp_status, "running") == 0)
- return 0;
- }
-#endif
- usleep(100000);
- }
- return -1;
-}
-
-int wifi_stop_supplicant()
-{
- char supp_status[PROPERTY_VALUE_MAX] = {'\0'};
- int count = 50; /* wait at most 5 seconds for completion */
-
- /* Check whether supplicant already stopped */
- if (property_get(SUPP_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(SUPP_PROP_NAME, supp_status, NULL)) {
- if (strcmp(supp_status, "stopped") == 0)
- return 0;
- }
- usleep(100000);
- }
- return -1;
-}
-
-int wifi_connect_to_supplicant()
-{
- char ifname[256];
- char supp_status[PROPERTY_VALUE_MAX] = {'\0'};
-
- /* Make sure supplicant is running */
- if (!property_get(SUPP_PROP_NAME, supp_status, NULL)
- || strcmp(supp_status, "running") != 0) {
- LOGE("Supplicant not running, cannot connect");
- return -1;
- }
-
- property_get("wifi.interface", iface, "sta");
-
- if (access(IFACE_DIR, F_OK) == 0) {
- snprintf(ifname, sizeof(ifname), "%s/%s", IFACE_DIR, iface);
- } else {
- strlcpy(ifname, iface, sizeof(ifname));
- }
-
- ctrl_conn = wpa_ctrl_open(ifname);
- if (ctrl_conn == NULL) {
- LOGE("Unable to open connection to supplicant on \"%s\": %s",
- ifname, strerror(errno));
- return -1;
- }
- monitor_conn = wpa_ctrl_open(ifname);
- if (monitor_conn == NULL) {
- wpa_ctrl_close(ctrl_conn);
- ctrl_conn = NULL;
- return -1;
- }
- if (wpa_ctrl_attach(monitor_conn) != 0) {
- wpa_ctrl_close(monitor_conn);
- wpa_ctrl_close(ctrl_conn);
- ctrl_conn = monitor_conn = NULL;
- return -1;
- }
- return 0;
-}
-
-int wifi_send_command(struct wpa_ctrl *ctrl, const char *cmd, char *reply, size_t *reply_len)
-{
- int ret;
-
- if (ctrl_conn == NULL) {
- LOGV("Not connected to wpa_supplicant - \"%s\" command dropped.\n", cmd);
- return -1;
- }
- ret = wpa_ctrl_request(ctrl, cmd, strlen(cmd), reply, reply_len, NULL);
- if (ret == -2) {
- LOGD("'%s' command timed out.\n", cmd);
- 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_wait_for_event(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 == NULL)
- return 0;
-
- result = wpa_ctrl_recv(monitor_conn, buf, &nread);
- if (result < 0) {
- LOGD("wpa_ctrl_recv failed: %s\n", strerror(errno));
- return -1;
- }
- buf[nread] = '\0';
- /* LOGD("wait_for_event: result=%d nread=%d string=\"%s\"\n", result, nread, buf); */
- /* Check for EOF on the socket */
- if (result == 0 && nread == 0) {
- /* Fabricate an event to pass up */
- LOGD("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;
-}
-
-void wifi_close_supplicant_connection()
-{
- if (ctrl_conn != NULL) {
- wpa_ctrl_close(ctrl_conn);
- ctrl_conn = NULL;
- }
- if (monitor_conn != NULL) {
- wpa_ctrl_close(monitor_conn);
- monitor_conn = NULL;
- }
-}
-
-int wifi_command(const char *command, char *reply, size_t *reply_len)
-{
- return wifi_send_command(ctrl_conn, command, reply, reply_len);
-}
OSDN Git Service
