1 /* 2 * Copyright (c) 1986, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 */ 7 8 #if defined(LIBC_SCCS) && !defined(lint) 9 static char sccsid[] = "@(#)ns_ntoa.c 8.1 (Berkeley) 06/04/93"; 10 #endif /* LIBC_SCCS and not lint */ 11 12 #include <sys/param.h> 13 #include <netns/ns.h> 14 #include <stdio.h> 15 16 char * 17 ns_ntoa(addr) 18 struct ns_addr addr; 19 { 20 static char obuf[40]; 21 union { union ns_net net_e; u_long long_e; } net; 22 u_short port = htons(addr.x_port); 23 register char *cp; 24 char *cp2; 25 register u_char *up = addr.x_host.c_host; 26 u_char *uplim = up + 6; 27 static char *spectHex(); 28 29 net.net_e = addr.x_net; 30 sprintf(obuf, "%lx", ntohl(net.long_e)); 31 cp = spectHex(obuf); 32 cp2 = cp + 1; 33 while (*up==0 && up < uplim) up++; 34 if (up == uplim) { 35 if (port) { 36 sprintf(cp, ".0"); 37 cp += 2; 38 } 39 } else { 40 sprintf(cp, ".%x", *up++); 41 while (up < uplim) { 42 while (*cp) cp++; 43 sprintf(cp, "%02x", *up++); 44 } 45 cp = spectHex(cp2); 46 } 47 if (port) { 48 sprintf(cp, ".%x", port); 49 spectHex(cp + 1); 50 } 51 return (obuf); 52 } 53 54 static char * 55 spectHex(p0) 56 char *p0; 57 { 58 int ok = 0; 59 int nonzero = 0; 60 register char *p = p0; 61 for (; *p; p++) switch (*p) { 62 63 case 'a': case 'b': case 'c': case 'd': case 'e': case 'f': 64 *p += ('A' - 'a'); 65 /* fall into . . . */ 66 case 'A': case 'B': case 'C': case 'D': case 'E': case 'F': 67 ok = 1; 68 case '1': case '2': case '3': case '4': case '5': 69 case '6': case '7': case '8': case '9': 70 nonzero = 1; 71 } 72 if (nonzero && !ok) { *p++ = 'H'; *p = 0; } 73 return (p); 74 } 75