Simplify code that parses ifa_flags. am: c00d57d353 (eb571191) · Commits · e / os / android_system_core

libsysutils/src/NetlinkEvent.cpp

+4 −6

Original line number	Diff line number	Diff line
		@@ -180,7 +180,7 @@ bool NetlinkEvent::parseIfAddrMessage(const struct nlmsghdr *nh) {
		struct ifa_cacheinfo *cacheinfo = nullptr;
		char addrstr[INET6_ADDRSTRLEN] = "";
		char ifname[IFNAMSIZ] = "";
		uint32_t flags = 0;
		uint32_t flags;

		if (!checkRtNetlinkLength(nh, sizeof(*ifaddr)))
		return false;
		@@ -195,6 +195,9 @@ bool NetlinkEvent::parseIfAddrMessage(const struct nlmsghdr *nh) {
		// For log messages.
		const char *msgtype = rtMessageName(type);

		// First 8 bits of flags. In practice will always be overridden when parsing IFA_FLAGS below.
		flags = ifaddr->ifa_flags;

		struct rtattr *rta;
		int len = IFA_PAYLOAD(nh);
		for (rta = IFA_RTA(ifaddr); RTA_OK(rta, len); rta = RTA_NEXT(rta, len)) {
		@@ -231,10 +234,6 @@ bool NetlinkEvent::parseIfAddrMessage(const struct nlmsghdr *nh) {
		SLOGD("Unknown ifindex %d in %s", ifaddr->ifa_index, msgtype);
		}

		// First 8 bits of flags. In practice will always be overridden by the IFA_FLAGS below,
		// because that always appears after IFA_ADDRESS. But just in case, support both orders.
		flags = (flags & 0xffffff00) \| ifaddr->ifa_flags;

		} else if (rta->rta_type == IFA_CACHEINFO) {
		// Address lifetime information.
		if (maybeLogDuplicateAttribute(cacheinfo, "IFA_CACHEINFO", msgtype))
		@@ -249,7 +248,6 @@ bool NetlinkEvent::parseIfAddrMessage(const struct nlmsghdr *nh) {
		cacheinfo = (struct ifa_cacheinfo *) RTA_DATA(rta);

		} else if (rta->rta_type == IFA_FLAGS) {
		// In practice IFA_FLAGS is always after IFA_ADDRESS, so this will overwrite the flags.
		flags = (uint32_t)RTA_DATA(rta);
		}
		}