socket_loopback_server.c revision dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0
1/* libs/cutils/socket_loopback_server.c 2** 3** Copyright 2006, The Android Open Source Project 4** 5** Licensed under the Apache License, Version 2.0 (the "License"); 6** you may not use this file except in compliance with the License. 7** You may obtain a copy of the License at 8** 9** http://www.apache.org/licenses/LICENSE-2.0 10** 11** Unless required by applicable law or agreed to in writing, software 12** distributed under the License is distributed on an "AS IS" BASIS, 13** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14** See the License for the specific language governing permissions and 15** limitations under the License. 16*/ 17 18#include <cutils/sockets.h> 19 20#include <stdlib.h> 21#include <string.h> 22#include <unistd.h> 23#include <errno.h> 24#include <stddef.h> 25 26#define LISTEN_BACKLOG 4 27 28#ifndef HAVE_WINSOCK 29#include <sys/socket.h> 30#include <sys/select.h> 31#include <sys/types.h> 32#include <netinet/in.h> 33#endif 34 35/* open listen() port on loopback interface */ 36int socket_loopback_server(int port, int type) 37{ 38 struct sockaddr_in addr; 39 size_t alen; 40 int s, n; 41 42 memset(&addr, 0, sizeof(addr)); 43 addr.sin_family = AF_INET; 44 addr.sin_port = htons(port); 45 addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK); 46 47 s = socket(AF_INET, type, 0); 48 if(s < 0) return -1; 49 50 n = 1; 51 setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &n, sizeof(n)); 52 53 if(bind(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) { 54 close(s); 55 return -1; 56 } 57 58 if (type == SOCK_STREAM) { 59 int ret; 60 61 ret = listen(s, LISTEN_BACKLOG); 62 63 if (ret < 0) { 64 close(s); 65 return -1; 66 } 67 } 68 69 return s; 70} 71 72