| The Android Open Source Project | 1dc9e47 | 2009-03-03 19:28:35 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2008 The Android Open Source Project |
| 3 | * All rights reserved. |
| 4 | * |
| 5 | * Redistribution and use in source and binary forms, with or without |
| 6 | * modification, are permitted provided that the following conditions |
| 7 | * are met: |
| 8 | * * Redistributions of source code must retain the above copyright |
| 9 | * notice, this list of conditions and the following disclaimer. |
| 10 | * * Redistributions in binary form must reproduce the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer in |
| 12 | * the documentation and/or other materials provided with the |
| 13 | * distribution. |
| 14 | * |
| 15 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 16 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 17 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
| 18 | * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
| 19 | * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 20 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
| 21 | * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS |
| 22 | * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
| 23 | * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| 24 | * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| 25 | * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 26 | * SUCH DAMAGE. |
| 27 | */ |
| Elliott Hughes | 0c485da | 2016-02-03 14:13:52 -0800 | [diff] [blame] | 28 | |
| 29 | #include<netinet/in.h> |
| 30 | |
| The Android Open Source Project | 1dc9e47 | 2009-03-03 19:28:35 -0800 | [diff] [blame] | 31 | #include<errno.h> |
| Elliott Hughes | e437788 | 2016-08-12 10:38:35 -0700 | [diff] [blame] | 32 | #include<netdb.h> |
| The Android Open Source Project | 1dc9e47 | 2009-03-03 19:28:35 -0800 | [diff] [blame] | 33 | #include<sys/types.h> |
| 34 | #include<sys/socket.h> |
| The Android Open Source Project | 1dc9e47 | 2009-03-03 19:28:35 -0800 | [diff] [blame] | 35 | #include<string.h> |
| 36 | #include<unistd.h> |
| 37 | |
| Elliott Hughes | 0c485da | 2016-02-03 14:13:52 -0800 | [diff] [blame] | 38 | constexprint START_PORT=600; |
| 39 | constexprint END_PORT= IPPORT_RESERVED; |
| 40 | constexprint NUM_PORTS=(END_PORT- START_PORT); |
| The Android Open Source Project | 1dc9e47 | 2009-03-03 19:28:35 -0800 | [diff] [blame] | 41 | |
| Elliott Hughes | 0c485da | 2016-02-03 14:13:52 -0800 | [diff] [blame] | 42 | int bindresvport(int sd,struct sockaddr_in* sin){ |
| 43 | sockaddr_in sin0; |
| 44 | if(sin==nullptr){ |
| 45 | memset(&sin0,0,sizeof(sin0)); |
| 46 | sin=&sin0; |
| 47 | sin->sin_family= AF_INET; |
| 48 | } |
| The Android Open Source Project | 1dc9e47 | 2009-03-03 19:28:35 -0800 | [diff] [blame] | 49 | |
| Elliott Hughes | 0c485da | 2016-02-03 14:13:52 -0800 | [diff] [blame] | 50 | if(sin->sin_family!= AF_INET){ |
| 51 | errno= EPFNOSUPPORT; |
| 52 | return-1; |
| 53 | } |
| The Android Open Source Project | 1dc9e47 | 2009-03-03 19:28:35 -0800 | [diff] [blame] | 54 | |
| Elliott Hughes | 0c485da | 2016-02-03 14:13:52 -0800 | [diff] [blame] | 55 | // TODO: thread safety! |
| 56 | staticshort port; |
| 57 | if(port==0){ |
| 58 | port= START_PORT+(getpid()% NUM_PORTS); |
| 59 | } |
| The Android Open Source Project | 1dc9e47 | 2009-03-03 19:28:35 -0800 | [diff] [blame] | 60 | |
| Elliott Hughes | 0c485da | 2016-02-03 14:13:52 -0800 | [diff] [blame] | 61 | for(size_t i= NUM_PORTS; i>0; i--, port++){ |
| 62 | if(port== END_PORT) port= START_PORT; |
| 63 | sin->sin_port= htons(port); |
| 64 | int rc= TEMP_FAILURE_RETRY(bind(sd,reinterpret_cast<sockaddr*>(sin),sizeof(*sin))); |
| 65 | if(rc>=0)return rc; |
| 66 | } |
| 67 | return-1; |
| The Android Open Source Project | 1dc9e47 | 2009-03-03 19:28:35 -0800 | [diff] [blame] | 68 | } |
| Elliott Hughes | 0c485da | 2016-02-03 14:13:52 -0800 | [diff] [blame] | 69 | |
| 70 | const in6_addr in6addr_any= IN6ADDR_ANY_INIT; |
| 71 | const in6_addr in6addr_loopback= IN6ADDR_LOOPBACK_INIT; |
