blob: 01816128a994a7a6aeff62c236dec159b49f6c8a
| 1 | /* |
| 2 | * Sun RPC is a product of Sun Microsystems, Inc. and is provided for |
| 3 | * unrestricted use provided that this legend is included on all tape |
| 4 | * media and as a part of the software program in whole or part. Users |
| 5 | * may copy or modify Sun RPC without charge, but are not authorized |
| 6 | * to license or distribute it to anyone else except as part of a product or |
| 7 | * program developed by the user. |
| 8 | * |
| 9 | * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE |
| 10 | * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR |
| 11 | * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. |
| 12 | * |
| 13 | * Sun RPC is provided with no support and without any obligation on the |
| 14 | * part of Sun Microsystems, Inc. to assist in its use, correction, |
| 15 | * modification or enhancement. |
| 16 | * |
| 17 | * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE |
| 18 | * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC |
| 19 | * OR ANY PART THEREOF. |
| 20 | * |
| 21 | * In no event will Sun Microsystems, Inc. be liable for any lost revenue |
| 22 | * or profits or other special, indirect and consequential damages, even if |
| 23 | * Sun has been advised of the possibility of such damages. |
| 24 | * |
| 25 | * Sun Microsystems, Inc. |
| 26 | * 2550 Garcia Avenue |
| 27 | * Mountain View, California 94043 |
| 28 | */ |
| 29 | /* |
| 30 | * Copyright (c) 1987 by Sun Microsystems, Inc. |
| 31 | */ |
| 32 | |
| 33 | #define __FORCE_GLIBC |
| 34 | #include <features.h> |
| 35 | |
| 36 | #include <errno.h> |
| 37 | #include <unistd.h> |
| 38 | #include <string.h> |
| 39 | #ifdef ANDROID |
| 40 | #include <rpc/types.h> |
| 41 | extern long __set_errno(int n); |
| 42 | #else |
| 43 | #include <sys/types.h> |
| 44 | #endif |
| 45 | #include <sys/socket.h> |
| 46 | #include <netinet/in.h> |
| 47 | |
| 48 | |
| 49 | /* |
| 50 | * Bind a socket to a privileged IP port |
| 51 | */ |
| 52 | int |
| 53 | bindresvport (int sd, struct sockaddr_in *sin) |
| 54 | { |
| 55 | int res; |
| 56 | static short port; |
| 57 | struct sockaddr_in myaddr; |
| 58 | int i; |
| 59 | |
| 60 | #define STARTPORT 600 |
| 61 | #define ENDPORT (IPPORT_RESERVED - 1) |
| 62 | #define NPORTS (ENDPORT - STARTPORT + 1) |
| 63 | |
| 64 | if (sin == (struct sockaddr_in *) 0) |
| 65 | { |
| 66 | sin = &myaddr; |
| 67 | memset (sin, 0, sizeof (*sin)); |
| 68 | sin->sin_family = AF_INET; |
| 69 | } |
| 70 | else if (sin->sin_family != AF_INET) |
| 71 | { |
| 72 | __set_errno (EPFNOSUPPORT); |
| 73 | return -1; |
| 74 | } |
| 75 | |
| 76 | if (port == 0) |
| 77 | { |
| 78 | port = (getpid () % NPORTS) + STARTPORT; |
| 79 | } |
| 80 | res = -1; |
| 81 | __set_errno (EADDRINUSE); |
| 82 | |
| 83 | for (i = 0; i < NPORTS && res < 0 && errno == EADDRINUSE; ++i) |
| 84 | { |
| 85 | sin->sin_port = htons (port); |
| 86 | if (++port > ENDPORT) |
| 87 | { |
| 88 | port = STARTPORT; |
| 89 | } |
| 90 | res = bind(sd, (struct sockaddr *)sin, sizeof(struct sockaddr_in)); |
| 91 | } |
| 92 | |
| 93 | return res; |
| 94 | } |
| 95 | libc_hidden_def(bindresvport) |
| 96 |