/* * Sun RPC is a product of Sun Microsystems, Inc. and is provided for * unrestricted use provided that this legend is included on all tape * media and as a part of the software program in whole or part. Users * may copy or modify Sun RPC without charge, but are not authorized * to license or distribute it to anyone else except as part of a product or * program developed by the user. * * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. * * Sun RPC is provided with no support and without any obligation on the * part of Sun Microsystems, Inc. to assist in its use, correction, * modification or enhancement. * * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC * OR ANY PART THEREOF. * * In no event will Sun Microsystems, Inc. be liable for any lost revenue * or profits or other special, indirect and consequential damages, even if * Sun has been advised of the possibility of such damages. * * Sun Microsystems, Inc. * 2550 Garcia Avenue * Mountain View, California 94043 */ #if defined(LIBC_SCCS) && !defined(lint) /*static char *sccsid = "from: @(#)bindresvport.c 1.8 88/02/08 SMI";*/ /*static char *sccsid = "from: @(#)bindresvport.c 2.2 88/07/29 4.0 RPCSRC";*/ static char *rcsid = "$Id: bindresvport.c,v 1.3 1995/10/22 14:51:11 phk Exp $"; #endif /* * Copyright (c) 1987 by Sun Microsystems, Inc. */ #include #include #include #include #include #include /* * Bind a socket to a privileged IP port */ int bindresvport(sd, sin) int sd; struct sockaddr_in *sin; { int res; static short port; struct sockaddr_in myaddr; int i; #define STARTPORT 600 #define ENDPORT (IPPORT_RESERVED - 1) #define NPORTS (ENDPORT - STARTPORT + 1) if (sin == (struct sockaddr_in *)0) { sin = &myaddr; bzero(sin, sizeof (*sin)); sin->sin_family = AF_INET; } else if (sin->sin_family != AF_INET) { errno = EPFNOSUPPORT; return (-1); } if (port == 0) { port = (getpid() % NPORTS) + STARTPORT; } res = -1; errno = EADDRINUSE; for (i = 0; i < NPORTS && res < 0 && errno == EADDRINUSE; i++) { sin->sin_port = htons(port++); if (port > ENDPORT) { port = STARTPORT; } res = bind(sd, (struct sockaddr *)sin, sizeof(struct sockaddr_in)); } return (res); }