1 /* 2 * Copyright (c) 1986 Regents of the University of California. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms are permitted 6 * provided that the above copyright notice and this paragraph are 7 * duplicated in all such forms and that any documentation, 8 * advertising materials, and other materials related to such 9 * distribution and use acknowledge that the software was developed 10 * by the University of California, Berkeley. The name of the 11 * University may not be used to endorse or promote products derived 12 * from this software without specific prior written permission. 13 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR 14 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED 15 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. 16 * 17 * This code is derived from software contributed to Berkeley by 18 * J.Q. Johnson at Cornell University. 19 */ 20 21 #if defined(LIBC_SCCS) && !defined(lint) 22 static char sccsid[] = "@(#)ns_addr.c 6.4 (Berkeley) 08/12/88"; 23 #endif /* LIBC_SCCS and not lint */ 24 25 #include <sys/types.h> 26 #include <netns/ns.h> 27 28 static struct ns_addr addr, zero_addr; 29 30 struct ns_addr 31 ns_addr(name) 32 char *name; 33 { 34 char separator = '.'; 35 char *hostname, *socketname, *cp; 36 char buf[50]; 37 extern char *index(); 38 39 addr = zero_addr; 40 (void)strncpy(buf, name, 49); 41 42 /* 43 * First, figure out what he intends as a field separtor. 44 * Despite the way this routine is written, the prefered 45 * form 2-272.AA001234H.01777, i.e. XDE standard. 46 * Great efforts are made to insure backward compatability. 47 */ 48 if (hostname = index(buf, '#')) 49 separator = '#'; 50 else { 51 hostname = index(buf, '.'); 52 if ((cp = index(buf, ':')) && 53 ( (hostname && cp < hostname) || (hostname == 0))) { 54 hostname = cp; 55 separator = ':'; 56 } 57 } 58 if (hostname) 59 *hostname++ = 0; 60 Field(buf, addr.x_net.c_net, 4); 61 if (hostname == 0) 62 return (addr); /* No separator means net only */ 63 64 socketname = index(hostname, separator); 65 if (socketname) { 66 *socketname++ = 0; 67 Field(socketname, (u_char *)&addr.x_port, 2); 68 } 69 70 Field(hostname, addr.x_host.c_host, 6); 71 72 return (addr); 73 } 74 75 static 76 Field(buf, out, len) 77 char *buf; 78 u_char *out; 79 int len; 80 { 81 register char *bp = buf; 82 int i, ibase, base16 = 0, base10 = 0, clen = 0; 83 int hb[6], *hp; 84 char *fmt; 85 86 /* 87 * first try 2-273#2-852-151-014#socket 88 */ 89 if ((*buf != '-') && 90 (1 < (i = sscanf(buf, "%d-%d-%d-%d-%d", 91 &hb[0], &hb[1], &hb[2], &hb[3], &hb[4])))) { 92 cvtbase(1000L, 256, hb, i, out, len); 93 return; 94 } 95 /* 96 * try form 8E1#0.0.AA.0.5E.E6#socket 97 */ 98 if (1 < (i = sscanf(buf,"%x.%x.%x.%x.%x.%x", 99 &hb[0], &hb[1], &hb[2], &hb[3], &hb[4], &hb[5]))) { 100 cvtbase(256L, 256, hb, i, out, len); 101 return; 102 } 103 /* 104 * try form 8E1#0:0:AA:0:5E:E6#socket 105 */ 106 if (1 < (i = sscanf(buf,"%x:%x:%x:%x:%x:%x", 107 &hb[0], &hb[1], &hb[2], &hb[3], &hb[4], &hb[5]))) { 108 cvtbase(256L, 256, hb, i, out, len); 109 return; 110 } 111 /* 112 * This is REALLY stretching it but there was a 113 * comma notation separting shorts -- definitely non standard 114 */ 115 if (1 < (i = sscanf(buf,"%x,%x,%x", 116 &hb[0], &hb[1], &hb[2]))) { 117 hb[0] = htons(hb[0]); hb[1] = htons(hb[1]); 118 hb[2] = htons(hb[2]); 119 cvtbase(65536L, 256, hb, i, out, len); 120 return; 121 } 122 123 /* Need to decide if base 10, 16 or 8 */ 124 while (*bp) switch (*bp++) { 125 126 case '0': case '1': case '2': case '3': case '4': case '5': 127 case '6': case '7': case '-': 128 break; 129 130 case '8': case '9': 131 base10 = 1; 132 break; 133 134 case 'a': case 'b': case 'c': case 'd': case 'e': case 'f': 135 case 'A': case 'B': case 'C': case 'D': case 'E': case 'F': 136 base16 = 1; 137 break; 138 139 case 'x': case 'X': 140 *--bp = '0'; 141 base16 = 1; 142 break; 143 144 case 'h': case 'H': 145 base16 = 1; 146 /* fall into */ 147 148 default: 149 *--bp = 0; /* Ends Loop */ 150 } 151 if (base16) { 152 fmt = "%3x"; 153 ibase = 4096; 154 } else if (base10 == 0 && *buf == '0') { 155 fmt = "%3o"; 156 ibase = 512; 157 } else { 158 fmt = "%3d"; 159 ibase = 1000; 160 } 161 162 for (bp = buf; *bp++; ) clen++; 163 if (clen == 0) clen++; 164 if (clen > 18) clen = 18; 165 i = ((clen - 1) / 3) + 1; 166 bp = clen + buf - 3; 167 hp = hb + i - 1; 168 169 while (hp > hb) { 170 (void)sscanf(bp, fmt, hp); 171 bp[0] = 0; 172 hp--; 173 bp -= 3; 174 } 175 (void)sscanf(buf, fmt, hp); 176 cvtbase((long)ibase, 256, hb, i, out, len); 177 } 178 179 static 180 cvtbase(oldbase,newbase,input,inlen,result,reslen) 181 long oldbase; 182 int newbase; 183 int input[]; 184 int inlen; 185 unsigned char result[]; 186 int reslen; 187 { 188 int d, e; 189 long sum; 190 191 e = 1; 192 while (e > 0 && reslen > 0) { 193 d = 0; e = 0; sum = 0; 194 /* long division: input=input/newbase */ 195 while (d < inlen) { 196 sum = sum*oldbase + (long) input[d]; 197 e += (sum > 0); 198 input[d++] = sum / newbase; 199 sum %= newbase; 200 } 201 result[--reslen] = sum; /* accumulate remainder */ 202 } 203 for (d=0; d < reslen; d++) 204 result[d] = 0; 205 } 206