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 */ 37 int 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
