| // Copyright (c) 2011 The Chromium OS Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include <time.h> |
| |
| #include <unistd.h> |
| #include <string.h> |
| #include <sys/socket.h> |
| #include <arpa/inet.h> |
| #include <netinet/ether.h> |
| #include <net/if.h> |
| #include <net/if_arp.h> |
| #include <linux/netlink.h> |
| #include <linux/rtnetlink.h> |
| #include <fcntl.h> |
| #include <string> |
| |
| #include <base/callback_old.h> |
| #include <base/logging.h> |
| #include <base/memory/scoped_ptr.h> |
| #include <base/stl_util-inl.h> |
| #include <base/stringprintf.h> |
| |
| #include "shill/control_interface.h" |
| #include "shill/device.h" |
| #include "shill/device_info.h" |
| #include "shill/device_stub.h" |
| #include "shill/ethernet.h" |
| #include "shill/manager.h" |
| #include "shill/rtnl_handler.h" |
| #include "shill/rtnl_listener.h" |
| #include "shill/rtnl_message.h" |
| #include "shill/service.h" |
| #include "shill/wifi.h" |
| |
| using std::map; |
| using std::string; |
| |
| namespace shill { |
| |
| // static |
| const char *DeviceInfo::kInterfaceUevent= "/sys/class/net/%s/uevent"; |
| // static |
| const char *DeviceInfo::kInterfaceDriver= "/sys/class/net/%s/device/driver"; |
| // static |
| const char *DeviceInfo::kModemDrivers[] = { |
| "gobi", |
| "QCUSBNet2k", |
| "GobiNet", |
| NULL |
| }; |
| |
| |
| DeviceInfo::DeviceInfo(ControlInterface *control_interface, |
| EventDispatcher *dispatcher, |
| Manager *manager) |
| : control_interface_(control_interface), |
| dispatcher_(dispatcher), |
| manager_(manager), |
| link_callback_(NewCallback(this, &DeviceInfo::LinkMsgHandler)), |
| link_listener_(NULL) { |
| } |
| |
| DeviceInfo::~DeviceInfo() {} |
| |
| void DeviceInfo::AddDeviceToBlackList(const string &device_name) { |
| black_list_.insert(device_name); |
| } |
| |
| void DeviceInfo::Start() { |
| link_listener_.reset( |
| new RTNLListener(RTNLHandler::kRequestLink, link_callback_.get())); |
| RTNLHandler::GetInstance()->RequestDump(RTNLHandler::kRequestLink); |
| } |
| |
| void DeviceInfo::Stop() { |
| link_listener_.reset(NULL); |
| } |
| |
| void DeviceInfo::RegisterDevice(const DeviceRefPtr &device) { |
| VLOG(2) << __func__ << "(" << device->link_name() << ", " |
| << device->interface_index() << ")"; |
| CHECK(!GetDevice(device->interface_index()).get()); |
| infos_[device->interface_index()].device = device; |
| if (device->TechnologyIs(Device::kCellular) || |
| device->TechnologyIs(Device::kEthernet) || |
| device->TechnologyIs(Device::kWifi)) { |
| manager_->RegisterDevice(device); |
| } |
| } |
| |
| Device::Technology DeviceInfo::GetDeviceTechnology(const string &iface_name) { |
| char contents[1024]; |
| int length; |
| int fd; |
| string uevent_file = StringPrintf(kInterfaceUevent, iface_name.c_str()); |
| string driver_file = StringPrintf(kInterfaceDriver, iface_name.c_str()); |
| const char *wifi_type; |
| const char *driver_name; |
| int modem_idx; |
| |
| fd = open(uevent_file.c_str(), O_RDONLY); |
| if (fd < 0) |
| return Device::kUnknown; |
| |
| length = read(fd, contents, sizeof(contents) - 1); |
| if (length < 0) |
| return Device::kUnknown; |
| |
| /* |
| * If the "uevent" file contains the string "DEVTYPE=wlan\n" at the |
| * start of the file or after a newline, we can safely assume this |
| * is a wifi device. |
| */ |
| contents[length] = '\0'; |
| wifi_type = strstr(contents, "DEVTYPE=wlan\n"); |
| if (wifi_type != NULL && (wifi_type == contents || wifi_type[-1] == '\n')) |
| return Device::kWifi; |
| |
| length = readlink(driver_file.c_str(), contents, sizeof(contents)-1); |
| if (length < 0) |
| return Device::kUnknown; |
| |
| contents[length] = '\0'; |
| driver_name = strrchr(contents, '/'); |
| if (driver_name != NULL) { |
| driver_name++; |
| // See if driver for this interface is in a list of known modem driver names |
| for (modem_idx = 0; kModemDrivers[modem_idx] != NULL; modem_idx++) |
| if (strcmp(driver_name, kModemDrivers[modem_idx]) == 0) |
| return Device::kCellular; |
| } |
| |
| return Device::kEthernet; |
| } |
| |
| void DeviceInfo::AddLinkMsgHandler(const RTNLMessage &msg) { |
| DCHECK(msg.type() == RTNLMessage::kMessageTypeLink && |
| msg.mode() == RTNLMessage::kMessageModeAdd); |
| int dev_index = msg.interface_index(); |
| Device::Technology technology = Device::kUnknown; |
| |
| unsigned int flags = msg.link_status().flags; |
| unsigned int change = msg.link_status().change; |
| VLOG(2) << __func__ << "(index=" << dev_index |
| << ", flags=" << flags << ", change=" << change << ")"; |
| infos_[dev_index].flags = flags; |
| |
| DeviceRefPtr device = GetDevice(dev_index); |
| if (!device.get()) { |
| if (msg.HasAttribute(IFLA_ADDRESS)) { |
| infos_[dev_index].address = msg.GetAttribute(IFLA_ADDRESS); |
| VLOG(2) << "link index " << dev_index << " address " |
| << infos_[dev_index].address.HexEncode(); |
| } else { |
| LOG(ERROR) << "Add Link message does not have IFLA_ADDRESS!"; |
| return; |
| } |
| if (!msg.HasAttribute(IFLA_IFNAME)) { |
| LOG(ERROR) << "Add Link message does not have IFLA_IFNAME!"; |
| return; |
| } |
| ByteString b(msg.GetAttribute(IFLA_IFNAME)); |
| string link_name(reinterpret_cast<const char*>(b.GetConstData())); |
| VLOG(2) << "add link index " << dev_index << " name " << link_name; |
| |
| if (!link_name.empty()) { |
| if (ContainsKey(black_list_, link_name)) { |
| technology = Device::kBlacklisted; |
| } else { |
| technology = GetDeviceTechnology(link_name); |
| } |
| } |
| string address = infos_[dev_index].address.HexEncode(); |
| switch (technology) { |
| case Device::kCellular: |
| // Cellular devices are managed by ModemInfo. |
| VLOG(2) << "Cellular link " << link_name << " at index " << dev_index |
| << " ignored."; |
| return; |
| case Device::kEthernet: |
| device = new Ethernet(control_interface_, dispatcher_, manager_, |
| link_name, address, dev_index); |
| break; |
| case Device::kWifi: |
| device = new WiFi(control_interface_, dispatcher_, manager_, |
| link_name, address, dev_index); |
| break; |
| default: |
| device = new DeviceStub(control_interface_, dispatcher_, manager_, |
| link_name, address, dev_index, technology); |
| break; |
| } |
| RegisterDevice(device); |
| } |
| device->LinkEvent(flags, change); |
| } |
| |
| void DeviceInfo::DelLinkMsgHandler(const RTNLMessage &msg) { |
| DCHECK(msg.type() == RTNLMessage::kMessageTypeLink && |
| msg.mode() == RTNLMessage::kMessageModeDelete); |
| RemoveInfo(msg.interface_index()); |
| } |
| |
| DeviceRefPtr DeviceInfo::GetDevice(int interface_index) const { |
| const Info *info = GetInfo(interface_index); |
| return info ? info->device : NULL; |
| } |
| |
| bool DeviceInfo::GetAddress(int interface_index, ByteString *address) const { |
| const Info *info = GetInfo(interface_index); |
| if (!info) { |
| return false; |
| } |
| *address = info->address; |
| return true; |
| } |
| |
| bool DeviceInfo::GetFlags(int interface_index, unsigned int *flags) const { |
| const Info *info = GetInfo(interface_index); |
| if (!info) { |
| return false; |
| } |
| *flags = info->flags; |
| return true; |
| } |
| |
| const DeviceInfo::Info *DeviceInfo::GetInfo(int interface_index) const { |
| map<int, Info>::const_iterator iter = infos_.find(interface_index); |
| if (iter == infos_.end()) { |
| return NULL; |
| } |
| return &iter->second; |
| } |
| |
| void DeviceInfo::RemoveInfo(int interface_index) { |
| map<int, Info>::iterator iter = infos_.find(interface_index); |
| if (iter != infos_.end()) { |
| VLOG(2) << "Removing info for device index: " << interface_index; |
| if (iter->second.device.get()) { |
| manager_->DeregisterDevice(iter->second.device); |
| } |
| infos_.erase(iter); |
| } |
| } |
| |
| void DeviceInfo::LinkMsgHandler(const RTNLMessage &msg) { |
| DCHECK(msg.type() == RTNLMessage::kMessageTypeLink); |
| if (msg.mode() == RTNLMessage::kMessageModeAdd) { |
| AddLinkMsgHandler(msg); |
| } else if (msg.mode() == RTNLMessage::kMessageModeDelete) { |
| DelLinkMsgHandler(msg); |
| } else { |
| NOTREACHED(); |
| } |
| } |
| |
| } // namespace shill |