/* * 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 */ /* * Copyright (c) 1987 by Sun Microsystems, Inc. */ #define __FORCE_GLIBC #include <features.h> #include <errno.h> #include <unistd.h> #include <string.h> #include <sys/types.h> #include <sys/socket.h> #include <netinet/in.h> libc_hidden_proto(memset) libc_hidden_proto(bind) libc_hidden_proto(getpid) /* * Bind a socket to a privileged IP port */ libc_hidden_proto(bindresvport) int bindresvport (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; memset (sin, 0, sizeof (*sin)); sin->sin_family = AF_INET; } else if (sin->sin_family != AF_INET) { __set_errno (EPFNOSUPPORT); return -1; } if (port == 0) { port = (getpid () % NPORTS) + STARTPORT; } res = -1; __set_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; } libc_hidden_def(bindresvport)