upload android base code part6

android/system/extras/multinetwork/common.cpp

@@ -0,0 +1,135 @@
+/*
+ * Copyright (C) 2016 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 "common.h"
+
+#include <android/api-level.h>
+#include <arpa/inet.h>
+#include <assert.h>
+#include <ctype.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <string.h>
+#include <iostream>
+
+
+namespace {
+
+bool strEqual(const char *a, const char *b) {
+    return strcmp(a, b) == 0;
+}
+
+// Allow specifying network handles in decimal and hexadecimal.
+bool parseNetworkHandle(const char *arg, net_handle_t *nethandle) {
+    if (arg == nullptr || !isdigit(arg[0]) || nethandle == nullptr) {
+        return false;
+    }
+
+    net_handle_t nh;
+    char *end = nullptr;
+
+    nh = strtoull(arg, &end, 0);
+    if (end != nullptr && *end == '\0') {
+        *nethandle = nh;
+        return true;
+    }
+    return false;
+}
+
+}  // namespace
+
+
+void printUsage(const char *progname) {
+    std::cerr << "Usage: " << progname
+              << " [--nethandle <nethandle>]"
+              << " [--mode explicit|process]"
+              << " [--family unspec|ipv4|ipv6]"
+              << " <argument>"
+              << std::endl;
+    std::cerr << std::endl;
+    std::cerr << "Learn nethandle values from 'dumpsys connectivity --short' "
+              << "or 'dumpsys connectivity --diag'"
+              << std::endl;
+}
+
+Arguments::~Arguments() {}
+
+bool Arguments::parseArguments(int argc, const char* argv[]) {
+    if (argc < 1 || argv == nullptr) { return false; }
+
+    for (int i = 1; i < argc; i++) {
+        if (strEqual(argv[i], "--nethandle")) {
+            i++;
+            if (argc == i) break;
+            if (!parseNetworkHandle(argv[i], &nethandle)) {
+                std::cerr << "Failed to parse nethandle: '" << argv[i] << "'"
+                          << std::endl;
+                break;
+            }
+        } else if (strEqual(argv[i], "--family")) {
+            i++;
+            if (argc == i) break;
+            if (strEqual(argv[i], "unspec")) {
+                family = AF_UNSPEC;
+            } else if (strEqual(argv[i], "ipv4")) {
+                family = AF_INET;
+            } else if (strEqual(argv[i], "ipv6")) {
+                family = AF_INET6;
+            } else {
+                break;
+            }
+        } else if (strEqual(argv[i], "--mode")) {
+            i++;
+            if (argc == i) break;
+            if (strEqual(argv[i], "explicit")) {
+                api_mode = ApiMode::EXPLICIT;
+            } else if (strEqual(argv[i], "process")) {
+                api_mode = ApiMode::PROCESS;
+            } else {
+                break;
+            }
+        } else if (arg1 == nullptr) {
+            arg1 = argv[i];
+        } else {
+            arg1 = nullptr;
+            break;
+        }
+    }
+
+    if (arg1 != nullptr) {
+        return true;
+    }
+
+    printUsage(argv[0]);
+    return false;
+}
+
+
+std::string inetSockaddrToString(const sockaddr* sa) {
+    const bool is_ipv6 = (sa->sa_family == AF_INET6);
+    char host[INET6_ADDRSTRLEN];
+    char port[sizeof("65535")];
+    getnameinfo(sa, is_ipv6 ? sizeof(sockaddr_in6) : sizeof(sockaddr_in),
+                host, sizeof(host),
+                port, sizeof(port),
+                NI_NUMERICHOST | NI_NUMERICSERV);
+
+    if (port[0] == '0' || port[0] == '\0') {
+        return std::string(host);
+    }
+    return (is_ipv6 ? "[" : "") + std::string(host) + (is_ipv6 ? "]:" : ":") + std::string(port);
+}