projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| aa524f68 KM |
1 | static char sccsid[] = "@(#)bindresvport.c 2.2 88/07/29 4.0 RPCSRC 1.8 88/02/08 SMI"; |
| 2 | /* | |
| 3 | * Sun RPC is a product of Sun Microsystems, Inc. and is provided for | |
| 4 | * unrestricted use provided that this legend is included on all tape | |
| 5 | * media and as a part of the software program in whole or part. Users | |
| 6 | * may copy or modify Sun RPC without charge, but are not authorized | |
| 7 | * to license or distribute it to anyone else except as part of a product or | |
| 8 | * program developed by the user. | |
| 9 | * | |
| 10 | * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE | |
| 11 | * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR | |
| 12 | * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. | |
| 13 | * | |
| 14 | * Sun RPC is provided with no support and without any obligation on the | |
| 15 | * part of Sun Microsystems, Inc. to assist in its use, correction, | |
| 16 | * modification or enhancement. | |
| 17 | * | |
| 18 | * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE | |
| 19 | * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC | |
| 20 | * OR ANY PART THEREOF. | |
| 21 | * | |
| 22 | * In no event will Sun Microsystems, Inc. be liable for any lost revenue | |
| 23 | * or profits or other special, indirect and consequential damages, even if | |
| 24 | * Sun has been advised of the possibility of such damages. | |
| 25 | * | |
| 26 | * Sun Microsystems, Inc. | |
| 27 | * 2550 Garcia Avenue | |
| 28 | * Mountain View, California 94043 | |
| 29 | */ | |
| 30 | ||
| 31 | /* | |
| 32 | * Copyright (c) 1987 by Sun Microsystems, Inc. | |
| 33 | */ | |
| 34 | ||
| 35 | #include <sys/types.h> | |
| 36 | #include <sys/errno.h> | |
| 37 | #include <sys/socket.h> | |
| 38 | #include <netinet/in.h> | |
| 39 | ||
| 40 | /* | |
| 41 | * Bind a socket to a privileged IP port | |
| 42 | */ | |
| 43 | bindresvport(sd, sin) | |
| 44 | int sd; | |
| 45 | struct sockaddr_in *sin; | |
| 46 | { | |
| 47 | int res; | |
| 48 | static short port; | |
| 49 | struct sockaddr_in myaddr; | |
| 50 | extern int errno; | |
| 51 | int i; | |
| 52 | ||
| 53 | #define STARTPORT 600 | |
| 54 | #define ENDPORT (IPPORT_RESERVED - 1) | |
| 55 | #define NPORTS (ENDPORT - STARTPORT + 1) | |
| 56 | ||
| 57 | if (sin == (struct sockaddr_in *)0) { | |
| 58 | sin = &myaddr; | |
| 59 | bzero(sin, sizeof (*sin)); | |
| 60 | sin->sin_family = AF_INET; | |
| 61 | } else if (sin->sin_family != AF_INET) { | |
| 62 | errno = EPFNOSUPPORT; | |
| 63 | return (-1); | |
| 64 | } | |
| 65 | if (port == 0) { | |
| 66 | port = (getpid() % NPORTS) + STARTPORT; | |
| 67 | } | |
| 68 | res = -1; | |
| 69 | errno = EADDRINUSE; | |
| 70 | for (i = 0; i < NPORTS && res < 0 && errno == EADDRINUSE; i++) { | |
| 71 | sin->sin_port = htons(port++); | |
| 72 | if (port > ENDPORT) { | |
| 73 | port = STARTPORT; | |
| 74 | } | |
| 75 | res = bind(sd, sin, sizeof(struct sockaddr_in)); | |
| 76 | } | |
| 77 | return (res); | |
| 78 | } |