keunyoung | b85b275 | 2013-03-08 12:28:03 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2011 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | #include "TcpStream.h" |
| 17 | #include <cutils/sockets.h> |
| 18 | #include <errno.h> |
| 19 | #include <stdio.h> |
| 20 | #include <stdlib.h> |
| 21 | #include <unistd.h> |
| 22 | #include <string.h> |
| 23 | |
| 24 | #ifndef _WIN32 |
| 25 | #include <netinet/in.h> |
| 26 | #include <netinet/tcp.h> |
| 27 | #else |
| 28 | #include <ws2tcpip.h> |
| 29 | #endif |
| 30 | |
Josh Gao | b0a0e2f | 2017-04-14 13:43:01 -0700 | [diff] [blame] | 31 | static int _socket_loopback_server(int port, int type) |
Josh Gao | 4b20c7b | 2017-04-13 15:13:31 -0700 | [diff] [blame] | 32 | { |
| 33 | struct sockaddr_in addr; |
| 34 | |
| 35 | memset(&addr, 0, sizeof(addr)); |
| 36 | addr.sin_family = AF_INET; |
| 37 | addr.sin_port = htons(port); |
| 38 | addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK); |
| 39 | |
| 40 | |
| 41 | int s = socket(AF_INET, type, 0); |
| 42 | if (s < 0) |
| 43 | return -1; |
| 44 | |
| 45 | int n = 1; |
| 46 | setsockopt(s, SOL_SOCKET, SO_REUSEADDR, (const char *) &n, sizeof(n)); |
| 47 | |
| 48 | if (bind(s, reinterpret_cast<sockaddr*>(&addr), sizeof(addr)) < 0) { |
| 49 | close(s); |
| 50 | return -1; |
| 51 | } |
| 52 | |
| 53 | if (type == SOCK_STREAM) { |
| 54 | if (listen(s, 4) < 0) { |
| 55 | close(s); |
| 56 | return -1; |
| 57 | } |
| 58 | } |
| 59 | |
| 60 | return s; |
| 61 | } |
| 62 | |
keunyoung | b85b275 | 2013-03-08 12:28:03 -0800 | [diff] [blame] | 63 | TcpStream::TcpStream(size_t bufSize) : |
| 64 | SocketStream(bufSize) |
| 65 | { |
| 66 | } |
| 67 | |
| 68 | TcpStream::TcpStream(int sock, size_t bufSize) : |
| 69 | SocketStream(sock, bufSize) |
| 70 | { |
| 71 | // disable Nagle algorithm to improve bandwidth of small |
| 72 | // packets which are quite common in our implementation. |
| 73 | #ifdef _WIN32 |
| 74 | DWORD flag; |
| 75 | #else |
| 76 | int flag; |
| 77 | #endif |
| 78 | flag = 1; |
| 79 | setsockopt( sock, IPPROTO_TCP, TCP_NODELAY, (const char*)&flag, sizeof(flag) ); |
| 80 | } |
| 81 | |
| 82 | int TcpStream::listen(unsigned short port) |
| 83 | { |
Josh Gao | b0a0e2f | 2017-04-14 13:43:01 -0700 | [diff] [blame] | 84 | m_sock = _socket_loopback_server(port, SOCK_STREAM); |
keunyoung | b85b275 | 2013-03-08 12:28:03 -0800 | [diff] [blame] | 85 | if (!valid()) return int(ERR_INVALID_SOCKET); |
| 86 | |
| 87 | return 0; |
| 88 | } |
| 89 | |
| 90 | SocketStream * TcpStream::accept() |
| 91 | { |
| 92 | int clientSock = -1; |
| 93 | |
| 94 | while (true) { |
| 95 | struct sockaddr_in addr; |
| 96 | socklen_t len = sizeof(addr); |
| 97 | clientSock = ::accept(m_sock, (sockaddr *)&addr, &len); |
| 98 | |
| 99 | if (clientSock < 0 && errno == EINTR) { |
| 100 | continue; |
| 101 | } |
| 102 | break; |
| 103 | } |
| 104 | |
| 105 | TcpStream *clientStream = NULL; |
| 106 | |
| 107 | if (clientSock >= 0) { |
| 108 | clientStream = new TcpStream(clientSock, m_bufsize); |
| 109 | } |
| 110 | return clientStream; |
| 111 | } |
| 112 | |
| 113 | int TcpStream::connect(unsigned short port) |
| 114 | { |
| 115 | return connect("127.0.0.1",port); |
| 116 | } |
| 117 | |
| 118 | int TcpStream::connect(const char* hostname, unsigned short port) |
| 119 | { |
| 120 | m_sock = socket_network_client(hostname, port, SOCK_STREAM); |
| 121 | if (!valid()) return -1; |
| 122 | return 0; |
| 123 | } |