wpa_supplicant/binder/supplicant.cpp

   1 /*
   2  * binder interface for wpa_supplicant daemon
   3  * Copyright (c) 2004-2016, Jouni Malinen <j@w1.fi>
   4  * Copyright (c) 2004-2016, Roshan Pius <rpius@google.com>
   5  *
   6  * This software may be distributed under the terms of the BSD license.
   7  * See README for more details.
   8  */
   9
  10 #include "binder_manager.h"
  11 #include "supplicant.h"
  12
  13 namespace wpa_supplicant_binder {
  14
  15 Supplicant::Supplicant(struct wpa_global *global)
  16         : wpa_global_(global)
  17 {
  18 }
  19
  20
  21 android::binder::Status Supplicant::CreateInterface(
  22         const android::os::PersistableBundle &params,
  23         android::sp<fi::w1::wpa_supplicant::IIface> *aidl_return)
  24 {
  25         android::String16 driver, ifname, confname, bridge_ifname;
  26
  27         /* Check if required Ifname argument is missing */
  28         if (!params.getString(android::String16("Ifname"), &ifname))
  29                 return android::binder::Status::fromServiceSpecificError(
  30                         ERROR_INVALID_ARGS,
  31                         android::String8("Ifname missing in params."));
  32         /* Retrieve the remaining params from the dictionary */
  33         params.getString(android::String16("Driver"), &driver);
  34         params.getString(android::String16("ConfigFile"), &confname);
  35         params.getString(android::String16("BridgeIfname"), &bridge_ifname);
  36
  37         /*
  38          * Try to get the wpa_supplicant record for this iface, return
  39          * an error if we already control it.
  40          */
  41         if (wpa_supplicant_get_iface(wpa_global_,
  42                                      android::String8(ifname).string()) != NULL)
  43                 return android::binder::Status::fromServiceSpecificError(
  44                         ERROR_IFACE_EXISTS,
  45                         android::String8("wpa_supplicant already controls this interface."));
  46
  47         android::binder::Status status;
  48         struct wpa_supplicant *wpa_s = NULL;
  49         struct wpa_interface iface;
  50
  51         os_memset(&iface, 0, sizeof(iface));
  52         iface.driver = os_strdup(android::String8(driver).string());
  53         iface.ifname = os_strdup(android::String8(ifname).string());
  54         iface.confname = os_strdup(android::String8(confname).string());
  55         iface.bridge_ifname = os_strdup(
  56                 android::String8(bridge_ifname).string());
  57         /* Otherwise, have wpa_supplicant attach to it. */
  58         wpa_s = wpa_supplicant_add_iface(wpa_global_, &iface, NULL);
  59         /* The supplicant core creates a corresponding binder object via
  60          * BinderManager when |wpa_supplicant_add_iface| is called. */
  61         if (!wpa_s || !wpa_s->binder_object_key) {
  62                 status = android::binder::Status::fromServiceSpecificError(
  63                         ERROR_UNKNOWN,
  64                         android::String8("wpa_supplicant couldn't grab this interface."));
  65         } else {
  66                 BinderManager *binder_manager = BinderManager::getInstance();
  67
  68                 if (!binder_manager ||
  69                     binder_manager->getIfaceBinderObjectByKey(
  70                             wpa_s->binder_object_key, aidl_return))
  71                         status = android::binder::Status::fromServiceSpecificError(
  72                                 ERROR_UNKNOWN,
  73                                 android::String8("wpa_supplicant encountered a binder error."));
  74                 else
  75                         status = android::binder::Status::ok();
  76         }
  77         os_free((void *) iface.driver);
  78         os_free((void *) iface.ifname);
  79         os_free((void *) iface.confname);
  80         os_free((void *) iface.bridge_ifname);
  81         return status;
  82 }
  83
  84
  85 android::binder::Status Supplicant::RemoveInterface(const std::string &ifname)
  86 {
  87         struct wpa_supplicant *wpa_s;
  88
  89         wpa_s = wpa_supplicant_get_iface(wpa_global_, ifname.c_str());
  90         if (!wpa_s || !wpa_s->binder_object_key)
  91                 return android::binder::Status::fromServiceSpecificError(
  92                         ERROR_IFACE_UNKNOWN,
  93                         android::String8("wpa_supplicant does not control this interface."));
  94         if (wpa_supplicant_remove_iface(wpa_global_, wpa_s, 0))
  95                 return android::binder::Status::fromServiceSpecificError(
  96                         ERROR_UNKNOWN,
  97                         android::String8("wpa_supplicant couldn't remove this interface."));
  98         return android::binder::Status::ok();
  99 }
 100
 101
 102 android::binder::Status Supplicant::GetInterface(
 103         const std::string &ifname,
 104         android::sp<fi::w1::wpa_supplicant::IIface> *aidl_return)
 105 {
 106         struct wpa_supplicant *wpa_s;
 107
 108         wpa_s = wpa_supplicant_get_iface(wpa_global_, ifname.c_str());
 109         if (!wpa_s || !wpa_s->binder_object_key)
 110                 return android::binder::Status::fromServiceSpecificError(
 111                         ERROR_IFACE_UNKNOWN,
 112                         android::String8("wpa_supplicant does not control this interface."));
 113
 114         BinderManager *binder_manager = BinderManager::getInstance();
 115         if (!binder_manager ||
 116             binder_manager->getIfaceBinderObjectByKey(wpa_s->binder_object_key,
 117                                                       aidl_return))
 118                 return android::binder::Status::fromServiceSpecificError(
 119                         ERROR_UNKNOWN,
 120                         android::String8("wpa_supplicant encountered a binder error."));
 121
 122         return android::binder::Status::ok();
 123 }
 124
 125 } /* namespace wpa_supplicant_binder */