Implement fetching hardware address (91c3a047) · Commits · e / os / android_hardware_interfaces

automotive/can/1.0/default/libnetdevice/include/libnetdevice/libnetdevice.h

+15 −0

Original line number	Diff line number	Diff line
		@@ -16,11 +16,16 @@

		#pragma once

		#include <linux/if_ether.h>

		#include <array>
		#include <optional>
		#include <string>

		namespace android::netdevice {

		typedef std::array<uint8_t, ETH_ALEN> hwaddr_t;

		/**
		* Configures libnetdevice to use PF_CAN sockets instead of AF_INET,
		* what requires less permissive SEPolicy rules for a given process.
		@@ -91,4 +96,14 @@ bool add(std::string dev, std::string type);
		*/
		bool del(std::string dev);

		/**
		* Fetches interface's hardware address.
		*
		* \param ifname Interface name
		* \return Hardware address (MAC address) or nullopt if the lookup failed
		*/
		std::optional<hwaddr_t> getHwAddr(const std::string& ifname);

		} // namespace android::netdevice

		bool operator==(const android::netdevice::hwaddr_t lhs, const unsigned char rhs[ETH_ALEN]);

+14 −0

Original line number	Diff line number	Diff line
		@@ -81,4 +81,18 @@ bool del(std::string dev) {
		return sock.send(req) && sock.receiveAck();
		}

		std::optional<hwaddr_t> getHwAddr(const std::string& ifname) {
		auto ifr = ifreqs::fromName(ifname);
		if (!ifreqs::send(SIOCGIFHWADDR, ifr)) return std::nullopt;

		hwaddr_t hwaddr;
		memcpy(hwaddr.data(), ifr.ifr_hwaddr.sa_data, hwaddr.size());
		return hwaddr;
		}

		} // namespace android::netdevice

		bool operator==(const android::netdevice::hwaddr_t lhs, const unsigned char rhs[ETH_ALEN]) {
		static_assert(lhs.size() == ETH_ALEN);
		return 0 == memcmp(lhs.data(), rhs, lhs.size());
		}