1/* libs/cutils/socket_loopback_client.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#ifndef HAVE_WINSOCK 27#include <sys/socket.h> 28#include <sys/select.h> 29#include <sys/types.h> 30#include <netinet/in.h> 31#endif 32 33/* Connect to port on the loopback IP interface. type is 34 * SOCK_STREAM or SOCK_DGRAM. 35 * return is a file descriptor or -1 on error 36 */ 37int socket_loopback_client(int port, int type) 38{ 39 struct sockaddr_in addr; 40 socklen_t alen; 41 int s; 42 43 memset(&addr, 0, sizeof(addr)); 44 addr.sin_family = AF_INET; 45 addr.sin_port = htons(port); 46 addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK); 47 48 s = socket(AF_INET, type, 0); 49 if(s < 0) return -1; 50 51 if(connect(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) { 52 close(s); 53 return -1; 54 } 55 56 return s; 57 58} 59 60