| /* |
| * 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> |
| |
| #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 char primary_iface[PROPERTY_VALUE_MAX]; |
| // TODO: use new ANDROID_SOCKET mechanism, once support for multiple |
| // sockets is in |
| |
| #ifndef WIFI_DRIVER_MODULE_ARG |
| #define WIFI_DRIVER_MODULE_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 |
| |
| #ifndef WIFI_DRIVER_FW_PATH_PARAM |
| #define WIFI_DRIVER_FW_PATH_PARAM "/sys/module/wlan/parameters/fwpath" |
| #endif |
| |
| #define WIFI_DRIVER_LOADER_DELAY 1000000 |
| |
| 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; |
| #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; |
| } |
| |
| 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 */ |
| |
| if (is_wifi_driver_loaded()) { |
| return 0; |
| } |
| |
| if (insmod(DRIVER_MODULE_PATH, DRIVER_MODULE_ARG) < 0) |
| return -1; |
| |
| if (strcmp(FIRMWARE_LOADER,"") == 0) { |
| /* usleep(WIFI_DRIVER_LOADER_DELAY); */ |
| 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) { |
| 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); |
| } |
| |
| 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"); |
| } |
| |
| /* 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; |
| } |
