1*0Sstevel@tonic-gate /* 2*0Sstevel@tonic-gate * Copyright (c) 1997-2000 by Sun Microsystems, Inc. 3*0Sstevel@tonic-gate * All rights reserved. 4*0Sstevel@tonic-gate */ 5*0Sstevel@tonic-gate 6*0Sstevel@tonic-gate /* 7*0Sstevel@tonic-gate * Copyright (c) 1996,1999 by Internet Software Consortium. 8*0Sstevel@tonic-gate * 9*0Sstevel@tonic-gate * Permission to use, copy, modify, and distribute this software for any 10*0Sstevel@tonic-gate * purpose with or without fee is hereby granted, provided that the above 11*0Sstevel@tonic-gate * copyright notice and this permission notice appear in all copies. 12*0Sstevel@tonic-gate * 13*0Sstevel@tonic-gate * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS 14*0Sstevel@tonic-gate * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES 15*0Sstevel@tonic-gate * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE 16*0Sstevel@tonic-gate * CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL 17*0Sstevel@tonic-gate * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR 18*0Sstevel@tonic-gate * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS 19*0Sstevel@tonic-gate * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS 20*0Sstevel@tonic-gate * SOFTWARE. 21*0Sstevel@tonic-gate */ 22*0Sstevel@tonic-gate 23*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 24*0Sstevel@tonic-gate 25*0Sstevel@tonic-gate #if defined(LIBC_SCCS) && !defined(lint) 26*0Sstevel@tonic-gate static const char rcsid[] = "$Id: inet_neta.c,v 1.6 1999/01/08 19:23:45 vixie Exp $"; 27*0Sstevel@tonic-gate #endif 28*0Sstevel@tonic-gate 29*0Sstevel@tonic-gate #include "port_before.h" 30*0Sstevel@tonic-gate 31*0Sstevel@tonic-gate #include <sys/types.h> 32*0Sstevel@tonic-gate #include <sys/socket.h> 33*0Sstevel@tonic-gate #include <netinet/in.h> 34*0Sstevel@tonic-gate #include <arpa/inet.h> 35*0Sstevel@tonic-gate 36*0Sstevel@tonic-gate #include <errno.h> 37*0Sstevel@tonic-gate #include <stdio.h> 38*0Sstevel@tonic-gate #include <string.h> 39*0Sstevel@tonic-gate 40*0Sstevel@tonic-gate #include "port_after.h" 41*0Sstevel@tonic-gate 42*0Sstevel@tonic-gate #ifdef SPRINTF_CHAR 43*0Sstevel@tonic-gate # define SPRINTF(x) strlen(sprintf/**/x) 44*0Sstevel@tonic-gate #else 45*0Sstevel@tonic-gate # define SPRINTF(x) ((size_t)sprintf x) 46*0Sstevel@tonic-gate #endif 47*0Sstevel@tonic-gate 48*0Sstevel@tonic-gate /* 49*0Sstevel@tonic-gate * char * 50*0Sstevel@tonic-gate * inet_neta(src, dst, size) 51*0Sstevel@tonic-gate * format a u_long network number into presentation format. 52*0Sstevel@tonic-gate * return: 53*0Sstevel@tonic-gate * pointer to dst, or NULL if an error occurred (check errno). 54*0Sstevel@tonic-gate * note: 55*0Sstevel@tonic-gate * format of ``src'' is as for inet_network(). 56*0Sstevel@tonic-gate * author: 57*0Sstevel@tonic-gate * Paul Vixie (ISC), July 1996 58*0Sstevel@tonic-gate */ 59*0Sstevel@tonic-gate char * 60*0Sstevel@tonic-gate inet_neta(src, dst, size) 61*0Sstevel@tonic-gate u_long src; 62*0Sstevel@tonic-gate char *dst; 63*0Sstevel@tonic-gate size_t size; 64*0Sstevel@tonic-gate { 65*0Sstevel@tonic-gate char *odst = dst; 66*0Sstevel@tonic-gate char *tp; 67*0Sstevel@tonic-gate 68*0Sstevel@tonic-gate while (src & 0xffffffff) { 69*0Sstevel@tonic-gate u_char b = (src & 0xff000000) >> 24; 70*0Sstevel@tonic-gate 71*0Sstevel@tonic-gate src <<= 8; 72*0Sstevel@tonic-gate if (b) { 73*0Sstevel@tonic-gate if (size < sizeof "255.") 74*0Sstevel@tonic-gate goto emsgsize; 75*0Sstevel@tonic-gate tp = dst; 76*0Sstevel@tonic-gate dst += SPRINTF((dst, "%u", b)); 77*0Sstevel@tonic-gate if (src != 0L) { 78*0Sstevel@tonic-gate *dst++ = '.'; 79*0Sstevel@tonic-gate *dst = '\0'; 80*0Sstevel@tonic-gate } 81*0Sstevel@tonic-gate size -= (size_t)(dst - tp); 82*0Sstevel@tonic-gate } 83*0Sstevel@tonic-gate } 84*0Sstevel@tonic-gate if (dst == odst) { 85*0Sstevel@tonic-gate if (size < sizeof "0.0.0.0") 86*0Sstevel@tonic-gate goto emsgsize; 87*0Sstevel@tonic-gate strcpy(dst, "0.0.0.0"); 88*0Sstevel@tonic-gate } 89*0Sstevel@tonic-gate return (odst); 90*0Sstevel@tonic-gate 91*0Sstevel@tonic-gate emsgsize: 92*0Sstevel@tonic-gate errno = EMSGSIZE; 93*0Sstevel@tonic-gate return (NULL); 94*0Sstevel@tonic-gate } 95