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 34 /* open listen() port on loopback interface */ 35 int socket_loopback_server(int port, int type) 36 { 37 struct sockaddr_in addr; 38 int s, n; 39 40 memset(&addr, 0, sizeof(addr)); 41 addr.sin_family = AF_INET; 42 addr.sin_port = htons(port); 43 addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK); 44 45 s = socket(AF_INET, type, 0); 46 if(s < 0) return -1; 47 48 n = 1; 49 setsockopt(s, SOL_SOCKET, SO_REUSEADDR, (const char *) &n, sizeof(n)); 50 51 if(bind(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) { 52 close(s); 53 return -1; 54 } 55 56 if (type == SOCK_STREAM) { 57 int ret; 58 59 ret = listen(s, LISTEN_BACKLOG); 60 61 if (ret < 0) { 62 close(s); 63 return -1; 64 } 65 } 66 67 return s; 68 } 69 70
