Add utility classes (Slice, Fd, Status, etc)
Test: as follows
- built
- flashed
- bootedt log
- netdutils_test passes
- unsubmitted NFLogListenerTest passes
Bug: 28806131
Change-Id: I17846a0dee1edca55df10e5464e607109d978cb5
diff --git a/libnetdutils/Netlink.cpp b/libnetdutils/Netlink.cpp
new file mode 100644
index 0000000..824c0f2
--- /dev/null
+++ b/libnetdutils/Netlink.cpp
@@ -0,0 +1,78 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * 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 <ios>
+#include <linux/netlink.h>
+
+#include "netdutils/Math.h"
+#include "netdutils/Netlink.h"
+
+namespace android {
+namespace netdutils {
+
+void forEachNetlinkMessage(const Slice buf,
+ const std::function<void(const nlmsghdr&, const Slice)>& onMsg) {
+ Slice tail = buf;
+ while (tail.size() >= sizeof(nlmsghdr)) {
+ nlmsghdr hdr = {};
+ extract(tail, hdr);
+ const auto len = std::max<size_t>(hdr.nlmsg_len, sizeof(hdr));
+ onMsg(hdr, drop(take(tail, len), sizeof(hdr)));
+ tail = drop(tail, align(len, 2));
+ }
+}
+
+void forEachNetlinkAttribute(const Slice buf,
+ const std::function<void(const nlattr&, const Slice)>& onAttr) {
+ Slice tail = buf;
+ while (tail.size() >= sizeof(nlattr)) {
+ nlattr hdr = {};
+ extract(tail, hdr);
+ const auto len = std::max<size_t>(hdr.nla_len, sizeof(hdr));
+ onAttr(hdr, drop(take(tail, len), sizeof(hdr)));
+ tail = drop(tail, align(len, 2));
+ }
+}
+
+} // namespace netdutils
+} // namespace android
+
+bool operator==(const sockaddr_nl& lhs, const sockaddr_nl& rhs) {
+ return (lhs.nl_family == rhs.nl_family) && (lhs.nl_pid == rhs.nl_pid) &&
+ (lhs.nl_groups == rhs.nl_groups);
+}
+
+bool operator!=(const sockaddr_nl& lhs, const sockaddr_nl& rhs) {
+ return !(lhs == rhs);
+}
+
+std::ostream& operator<<(std::ostream& os, const nlmsghdr& hdr) {
+ return os << std::hex << "nlmsghdr["
+ << "len: 0x" << hdr.nlmsg_len << ", type: 0x" << hdr.nlmsg_type << ", flags: 0x"
+ << hdr.nlmsg_flags << ", seq: 0x" << hdr.nlmsg_seq << ", pid: 0x" << hdr.nlmsg_pid
+ << "]" << std::dec;
+}
+
+std::ostream& operator<<(std::ostream& os, const nlattr& attr) {
+ return os << std::hex << "nlattr["
+ << "len: 0x" << attr.nla_len << ", type: 0x" << attr.nla_type << "]" << std::dec;
+}
+
+std::ostream& operator<<(std::ostream& os, const sockaddr_nl& addr) {
+ return os << std::hex << "sockaddr_nl["
+ << "family: " << addr.nl_family << ", pid: " << addr.nl_pid
+ << ", groups: " << addr.nl_groups << "]" << std::dec;
+}