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 static 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 */ 65 int 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 */ 78 int 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
