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Diffstat (limited to 'synadhd/wifi_hal/cpp_bindings.h')
| -rwxr-xr-x | synadhd/wifi_hal/cpp_bindings.h | 384 |
1 files changed, 384 insertions, 0 deletions
diff --git a/synadhd/wifi_hal/cpp_bindings.h b/synadhd/wifi_hal/cpp_bindings.h new file mode 100755 index 0000000..8b5600a --- /dev/null +++ b/synadhd/wifi_hal/cpp_bindings.h @@ -0,0 +1,384 @@ +/* + * Copyright (C) 2017 The Android Open Source Project + * + * Portions copyright (C) 2017 Broadcom Limited + * + * 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 "wifi_hal.h" +#include "common.h" +#include "sync.h" + +class WifiEvent +{ + /* TODO: remove this when nl headers are updated */ + static const unsigned NL80211_ATTR_MAX_INTERNAL = 256; +private: + struct nl_msg *mMsg; + struct genlmsghdr *mHeader; + struct nlattr *mAttributes[NL80211_ATTR_MAX_INTERNAL + 1]; + +public: + WifiEvent(nl_msg *msg) { + mMsg = msg; + mHeader = NULL; + memset(mAttributes, 0, sizeof(mAttributes)); + } + ~WifiEvent() { + /* don't destroy mMsg; it doesn't belong to us */ + } + + void log(); + + int parse(); + + genlmsghdr *header() { + return mHeader; + } + + int get_cmd() { + return mHeader->cmd; + } + + int get_vendor_id() { + return get_u32(NL80211_ATTR_VENDOR_ID); + } + + int get_vendor_subcmd() { + return get_u32(NL80211_ATTR_VENDOR_SUBCMD); + } + + void *get_vendor_data() { + return get_data(NL80211_ATTR_VENDOR_DATA); + } + + int get_vendor_data_len() { + return get_len(NL80211_ATTR_VENDOR_DATA); + } + + const char *get_cmdString(); + + nlattr ** attributes() { + return mAttributes; + } + + nlattr *get_attribute(int attribute) { + return mAttributes[attribute]; + } + + uint8_t get_u8(int attribute) { + return mAttributes[attribute] ? nla_get_u8(mAttributes[attribute]) : 0; + } + + uint16_t get_u16(int attribute) { + return mAttributes[attribute] ? nla_get_u16(mAttributes[attribute]) : 0; + } + + uint32_t get_u32(int attribute) { + return mAttributes[attribute] ? nla_get_u32(mAttributes[attribute]) : 0; + } + + uint64_t get_u64(int attribute) { + return mAttributes[attribute] ? nla_get_u64(mAttributes[attribute]) : 0; + } + + int get_len(int attribute) { + return mAttributes[attribute] ? nla_len(mAttributes[attribute]) : 0; + } + + void *get_data(int attribute) { + return mAttributes[attribute] ? nla_data(mAttributes[attribute]) : NULL; + } + + void *get_string(int attribute) { + return mAttributes[attribute] ? nla_get_string(mAttributes[attribute]) : NULL; + } +private: + WifiEvent(const WifiEvent&); // hide copy constructor to prevent copies +}; + +class nl_iterator { + struct nlattr *pos; + int rem; +public: + nl_iterator(struct nlattr *attr) { + pos = (struct nlattr *)nla_data(attr); + rem = nla_len(attr); + } + bool has_next() { + return nla_ok(pos, rem); + } + void next() { + pos = (struct nlattr *)nla_next(pos, &(rem)); + } + struct nlattr *get() { + return pos; + } + uint16_t get_type() { + return nla_type(pos); + } + uint8_t get_u8() { + return nla_get_u8(pos); + } + uint16_t get_u16() { + return nla_get_u16(pos); + } + uint32_t get_u32() { + return nla_get_u32(pos); + } + uint64_t get_u64() { + return nla_get_u64(pos); + } + void* get_data() { + return nla_data(pos); + } + int get_len() { + return nla_len(pos); + } + void* get_string() { + return nla_get_string(pos); + } +private: + nl_iterator(const nl_iterator&); // hide copy constructor to prevent copies +}; + +class WifiRequest +{ +private: + int mFamily; + int mIface; + struct nl_msg *mMsg; + +public: + WifiRequest(int family) { + mMsg = NULL; + mFamily = family; + mIface = -1; + } + + WifiRequest(int family, int iface) { + mMsg = NULL; + mFamily = family; + mIface = iface; + } + + ~WifiRequest() { + destroy(); + } + + void destroy() { + if (mMsg) { + nlmsg_free(mMsg); + mMsg = NULL; + } + } + + nl_msg *getMessage() { + return mMsg; + } + + /* Command assembly helpers */ + int create(int family, uint8_t cmd, int flags, int hdrlen); + int create(uint8_t cmd) { + return create(mFamily, cmd, 0, 0); + } + + int create(uint32_t id, int subcmd); + + int put(int attribute, void *ptr, unsigned len) { + return nla_put(mMsg, attribute, len, ptr); + } + int put_s8(int attribute, int8_t value) { + return nla_put(mMsg, attribute, sizeof(value), &value); + } + int put_u8(int attribute, uint8_t value) { + return nla_put(mMsg, attribute, sizeof(value), &value); + } + int put_u16(int attribute, uint16_t value) { + return nla_put(mMsg, attribute, sizeof(value), &value); + } + int put_u32(int attribute, uint32_t value) { + return nla_put(mMsg, attribute, sizeof(value), &value); + } + int put_u64(int attribute, uint64_t value) { + return nla_put(mMsg, attribute, sizeof(value), &value); + } + int put_string(int attribute, const char *value) { + return nla_put(mMsg, attribute, strlen(value) + 1, value); + } + int put_addr(int attribute, mac_addr value) { + return nla_put(mMsg, attribute, sizeof(mac_addr), value); + } + + struct nlattr * attr_start(int attribute) { + return nla_nest_start(mMsg, attribute); + } + void attr_end(struct nlattr *attr) { + nla_nest_end(mMsg, attr); + } + + int set_iface_id(int ifindex) { + return put_u32(NL80211_ATTR_IFINDEX, ifindex); + } +private: + WifiRequest(const WifiRequest&); // hide copy constructor to prevent copies + +}; + +class WifiCommand +{ +protected: + const char *mType; + hal_info *mInfo; + WifiRequest mMsg; + Condition mCondition; + wifi_request_id mId; + interface_info *mIfaceInfo; + int mRefs; +public: + WifiCommand(const char *type, wifi_handle handle, wifi_request_id id) + : mType(type), mMsg(getHalInfo(handle)->nl80211_family_id), mId(id), mRefs(1) + { + mIfaceInfo = NULL; + mInfo = getHalInfo(handle); + // ALOGD("WifiCommand %p created, mInfo = %p, mIfaceInfo = %p", this, mInfo, mIfaceInfo); + } + + WifiCommand(const char *type, wifi_interface_handle iface, wifi_request_id id) + : mType(type), mMsg(getHalInfo(iface)->nl80211_family_id, getIfaceInfo(iface)->id), + mId(id), mRefs(1) + { + mIfaceInfo = getIfaceInfo(iface); + mInfo = getHalInfo(iface); + // ALOGD("WifiCommand %p created, mInfo = %p, mIfaceInfo = %p", this, mInfo, mIfaceInfo); + } + + virtual ~WifiCommand() { + // ALOGD("WifiCommand %p destroyed", this); + } + + wifi_request_id id() { + return mId; + } + + const char *getType() { + return mType; + } + + virtual void addRef() { + int refs = __sync_add_and_fetch(&mRefs, 1); + ALOGV("addRef: WifiCommand %p has %d references", this, refs); + } + + virtual void releaseRef() { + int refs = __sync_sub_and_fetch(&mRefs, 1); + if (refs == 0) { + delete this; + } else { + // ALOGD("releaseRef: WifiCommand %p has %d references", this, refs); + } + } + + virtual int create() { + /* by default there is no way to cancel */ + ALOGD("WifiCommand %p can't be created", this); + return WIFI_ERROR_NOT_SUPPORTED; + } + + virtual int cancel() { + /* by default there is no way to cancel */ + return WIFI_ERROR_NOT_SUPPORTED; + } + + int requestResponse(); + int requestEvent(int cmd); + int requestVendorEvent(uint32_t id, int subcmd); + int requestResponse(WifiRequest& request); + +protected: + wifi_handle wifiHandle() { + return getWifiHandle(mInfo); + } + + wifi_interface_handle ifaceHandle() { + return getIfaceHandle(mIfaceInfo); + } + + int familyId() { + return mInfo->nl80211_family_id; + } + + int ifaceId() { + return mIfaceInfo->id; + } + + /* Override this method to parse reply and dig out data; save it in the object */ + virtual int handleResponse(WifiEvent& reply) { + ALOGI("skipping a response"); + return NL_SKIP; + } + + /* Override this method to parse event and dig out data; save it in the object */ + virtual int handleEvent(WifiEvent& event) { + ALOGI("skipping an event"); + return NL_SKIP; + } + + int registerHandler(int cmd) { + return wifi_register_handler(wifiHandle(), cmd, &event_handler, this); + } + + void unregisterHandler(int cmd) { + wifi_unregister_handler(wifiHandle(), cmd); + } + + int registerVendorHandler(uint32_t id, int subcmd) { + return wifi_register_vendor_handler(wifiHandle(), id, subcmd, &event_handler, this); + } + + void unregisterVendorHandlerWithoutLock(uint32_t id, int subcmd) { + wifi_unregister_vendor_handler_without_lock(wifiHandle(), id, subcmd); + } + + void unregisterVendorHandler(uint32_t id, int subcmd) { + wifi_unregister_vendor_handler(wifiHandle(), id, subcmd); + } + +private: + WifiCommand(const WifiCommand& ); // hide copy constructor to prevent copies + + /* Event handling */ + static int response_handler(struct nl_msg *msg, void *arg); + + static int event_handler(struct nl_msg *msg, void *arg); + + /* Other event handlers */ + static int valid_handler(struct nl_msg *msg, void *arg); + + static int ack_handler(struct nl_msg *msg, void *arg); + + static int finish_handler(struct nl_msg *msg, void *arg); + + static int error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg); +}; + +/* nl message processing macros (required to pass C++ type checks) */ + +#define for_each_attr(pos, nla, rem) \ + for (pos = (nlattr *)nla_data(nla), rem = nla_len(nla); \ + nla_ok(pos, rem); \ + pos = (nlattr *)nla_next(pos, &(rem))) + +extern void InitResponseLock(); +extern void DestroyResponseLock(); |