1/* 2** Copyright 2006, 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 17#include <errno.h> 18#include <stddef.h> 19#include <stdlib.h> 20#include <string.h> 21#include <unistd.h> 22 23#define LISTEN_BACKLOG 4 24 25#if !defined(_WIN32) 26#include <sys/socket.h> 27#include <sys/select.h> 28#include <sys/types.h> 29#include <netinet/in.h> 30#endif 31 32#include <cutils/sockets.h> 33 34static int _socket_loopback_server(int family, int type, struct sockaddr * addr, size_t size) 35{ 36 int s, n; 37 38 s = socket(family, type, 0); 39 if(s < 0) 40 return -1; 41 42 n = 1; 43 setsockopt(s, SOL_SOCKET, SO_REUSEADDR, (const char *) &n, sizeof(n)); 44 45 if(bind(s, addr, size) < 0) { 46 close(s); 47 return -1; 48 } 49 50 if (type == SOCK_STREAM) { 51 int ret; 52 53 ret = listen(s, LISTEN_BACKLOG); 54 55 if (ret < 0) { 56 close(s); 57 return -1; 58 } 59 } 60 61 return s; 62} 63 64/* open listen() port on loopback IPv6 interface */ 65int socket_loopback_server6(int port, int type) 66{ 67 struct sockaddr_in6 addr; 68 69 memset(&addr, 0, sizeof(addr)); 70 addr.sin6_family = AF_INET6; 71 addr.sin6_port = htons(port); 72 addr.sin6_addr = in6addr_loopback; 73 74 return _socket_loopback_server(AF_INET6, type, (struct sockaddr *) &addr, sizeof(addr)); 75} 76 77/* open listen() port on loopback interface */ 78int socket_loopback_server(int port, int type) 79{ 80 struct sockaddr_in addr; 81 82 memset(&addr, 0, sizeof(addr)); 83 addr.sin_family = AF_INET; 84 addr.sin_port = htons(port); 85 addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK); 86 87 return _socket_loopback_server(AF_INET, type, (struct sockaddr *) &addr, sizeof(addr)); 88} 89