1*0Sstevel@tonic-gate /* 2*0Sstevel@tonic-gate * CDDL HEADER START 3*0Sstevel@tonic-gate * 4*0Sstevel@tonic-gate * The contents of this file are subject to the terms of the 5*0Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only 6*0Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance 7*0Sstevel@tonic-gate * with the License. 8*0Sstevel@tonic-gate * 9*0Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10*0Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 11*0Sstevel@tonic-gate * See the License for the specific language governing permissions 12*0Sstevel@tonic-gate * and limitations under the License. 13*0Sstevel@tonic-gate * 14*0Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 15*0Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16*0Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 17*0Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 18*0Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 19*0Sstevel@tonic-gate * 20*0Sstevel@tonic-gate * CDDL HEADER END 21*0Sstevel@tonic-gate */ 22*0Sstevel@tonic-gate /* 23*0Sstevel@tonic-gate * Copyright 2002-2003 Sun Microsystems, Inc. All rights reserved. 24*0Sstevel@tonic-gate * Use is subject to license terms. 25*0Sstevel@tonic-gate */ 26*0Sstevel@tonic-gate 27*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 28*0Sstevel@tonic-gate 29*0Sstevel@tonic-gate #include <sys/salib.h> 30*0Sstevel@tonic-gate #include <sys/types.h> 31*0Sstevel@tonic-gate #include <sys/socket.h> 32*0Sstevel@tonic-gate #include <sys/bootvfs.h> 33*0Sstevel@tonic-gate #include <netinet/in.h> 34*0Sstevel@tonic-gate 35*0Sstevel@tonic-gate /* 36*0Sstevel@tonic-gate * This structure defines the static area where gethostbyname() 37*0Sstevel@tonic-gate * stores the hostent data that it returns to the caller. 38*0Sstevel@tonic-gate */ 39*0Sstevel@tonic-gate static struct { 40*0Sstevel@tonic-gate struct hostent he; 41*0Sstevel@tonic-gate in_addr_t *ha_list[2]; 42*0Sstevel@tonic-gate in_addr_t ha_addr; 43*0Sstevel@tonic-gate char ha_name[MAXHOSTNAMELEN+1]; 44*0Sstevel@tonic-gate } hostinfo; 45*0Sstevel@tonic-gate 46*0Sstevel@tonic-gate int h_errno; 47*0Sstevel@tonic-gate 48*0Sstevel@tonic-gate static in_addr_t inet_addr(const char *); 49*0Sstevel@tonic-gate static in_addr_t nam2addr(const char *); 50*0Sstevel@tonic-gate 51*0Sstevel@tonic-gate /* Very stripped-down gethostbyname() */ 52*0Sstevel@tonic-gate struct hostent * 53*0Sstevel@tonic-gate gethostbyname(const char *nam) 54*0Sstevel@tonic-gate { 55*0Sstevel@tonic-gate bzero(&hostinfo, sizeof (hostinfo)); 56*0Sstevel@tonic-gate 57*0Sstevel@tonic-gate hostinfo.ha_addr = inet_addr(nam); 58*0Sstevel@tonic-gate if ((int32_t)hostinfo.ha_addr == -1) { 59*0Sstevel@tonic-gate if (get_default_fs() == NULL) { 60*0Sstevel@tonic-gate h_errno = HOST_NOT_FOUND; 61*0Sstevel@tonic-gate return (NULL); 62*0Sstevel@tonic-gate } 63*0Sstevel@tonic-gate hostinfo.ha_addr = nam2addr(nam); 64*0Sstevel@tonic-gate if ((int32_t)hostinfo.ha_addr == -1) { 65*0Sstevel@tonic-gate h_errno = HOST_NOT_FOUND; 66*0Sstevel@tonic-gate return (NULL); 67*0Sstevel@tonic-gate } 68*0Sstevel@tonic-gate } 69*0Sstevel@tonic-gate 70*0Sstevel@tonic-gate hostinfo.he.h_addrtype = AF_INET; 71*0Sstevel@tonic-gate (void) strlcpy(hostinfo.ha_name, nam, MAXHOSTNAMELEN); 72*0Sstevel@tonic-gate hostinfo.he.h_name = hostinfo.ha_name; 73*0Sstevel@tonic-gate hostinfo.he.h_length = sizeof (struct in_addr); 74*0Sstevel@tonic-gate hostinfo.ha_list[0] = &hostinfo.ha_addr; 75*0Sstevel@tonic-gate hostinfo.he.h_addr_list = (char **)&hostinfo.ha_list; 76*0Sstevel@tonic-gate return (&hostinfo.he); 77*0Sstevel@tonic-gate } 78*0Sstevel@tonic-gate 79*0Sstevel@tonic-gate #define SKIP_SPACE(_p) \ 80*0Sstevel@tonic-gate { \ 81*0Sstevel@tonic-gate char _c; \ 82*0Sstevel@tonic-gate while ((_c = *(_p)) != '\0' && isspace(_c)) \ 83*0Sstevel@tonic-gate p++; \ 84*0Sstevel@tonic-gate if (_c == '\0') \ 85*0Sstevel@tonic-gate goto next_line; \ 86*0Sstevel@tonic-gate } 87*0Sstevel@tonic-gate 88*0Sstevel@tonic-gate #define SKIP_TOKEN(_p) \ 89*0Sstevel@tonic-gate { \ 90*0Sstevel@tonic-gate char _c; \ 91*0Sstevel@tonic-gate while ((_c = *(_p)) != '\0' && !isspace(_c)) \ 92*0Sstevel@tonic-gate p++; \ 93*0Sstevel@tonic-gate if (_c == '\0') \ 94*0Sstevel@tonic-gate goto next_line; \ 95*0Sstevel@tonic-gate } 96*0Sstevel@tonic-gate 97*0Sstevel@tonic-gate #define TRIM_LINE(_l) \ 98*0Sstevel@tonic-gate { \ 99*0Sstevel@tonic-gate char _c, *_p = (_l); \ 100*0Sstevel@tonic-gate while ((_c = *_p) != '#' && _c != '\n' && _c != '\0') \ 101*0Sstevel@tonic-gate _p++; \ 102*0Sstevel@tonic-gate *_p = '\0'; \ 103*0Sstevel@tonic-gate } 104*0Sstevel@tonic-gate 105*0Sstevel@tonic-gate #define BUFSZ 1024 106*0Sstevel@tonic-gate #define HOSTDB "/etc/inet/hosts" 107*0Sstevel@tonic-gate 108*0Sstevel@tonic-gate static in_addr_t 109*0Sstevel@tonic-gate nam2addr(const char *nam) 110*0Sstevel@tonic-gate { 111*0Sstevel@tonic-gate FILE *h; 112*0Sstevel@tonic-gate char c, buf[BUFSZ]; 113*0Sstevel@tonic-gate char *l, *p, *s; 114*0Sstevel@tonic-gate boolean_t first_token; 115*0Sstevel@tonic-gate 116*0Sstevel@tonic-gate if ((h = fopen(HOSTDB, "r")) == NULL) { 117*0Sstevel@tonic-gate return ((in_addr_t)-1); 118*0Sstevel@tonic-gate } 119*0Sstevel@tonic-gate 120*0Sstevel@tonic-gate next_line: 121*0Sstevel@tonic-gate if ((l = fgets(buf, BUFSZ, h)) == NULL) { 122*0Sstevel@tonic-gate (void) fclose(h); 123*0Sstevel@tonic-gate return ((in_addr_t)-1); 124*0Sstevel@tonic-gate } 125*0Sstevel@tonic-gate TRIM_LINE(l); 126*0Sstevel@tonic-gate 127*0Sstevel@tonic-gate p = l; 128*0Sstevel@tonic-gate first_token = B_TRUE; 129*0Sstevel@tonic-gate next_token: 130*0Sstevel@tonic-gate SKIP_SPACE(p); 131*0Sstevel@tonic-gate 132*0Sstevel@tonic-gate if (first_token) { 133*0Sstevel@tonic-gate first_token = B_FALSE; 134*0Sstevel@tonic-gate SKIP_TOKEN(p); 135*0Sstevel@tonic-gate 136*0Sstevel@tonic-gate *p++ = '\0'; 137*0Sstevel@tonic-gate goto next_token; 138*0Sstevel@tonic-gate } 139*0Sstevel@tonic-gate 140*0Sstevel@tonic-gate s = (char *)nam; 141*0Sstevel@tonic-gate if (*p++ == *s++) { 142*0Sstevel@tonic-gate while ((c = *s++) == *p && c != '\0') 143*0Sstevel@tonic-gate p++; 144*0Sstevel@tonic-gate if (c == '\0' && (isspace(*p) || *p == '\0')) 145*0Sstevel@tonic-gate goto match; 146*0Sstevel@tonic-gate } 147*0Sstevel@tonic-gate 148*0Sstevel@tonic-gate SKIP_TOKEN(p); 149*0Sstevel@tonic-gate goto next_token; 150*0Sstevel@tonic-gate match: 151*0Sstevel@tonic-gate (void) fclose(h); 152*0Sstevel@tonic-gate return (inet_addr((const char *)l)); 153*0Sstevel@tonic-gate } 154*0Sstevel@tonic-gate 155*0Sstevel@tonic-gate static in_addr_t 156*0Sstevel@tonic-gate inet_addr(const char *cp) 157*0Sstevel@tonic-gate { 158*0Sstevel@tonic-gate in_addr_t val; 159*0Sstevel@tonic-gate uint_t base, n; 160*0Sstevel@tonic-gate char c; 161*0Sstevel@tonic-gate in_addr_t parts[4], *pp = parts; 162*0Sstevel@tonic-gate 163*0Sstevel@tonic-gate again: 164*0Sstevel@tonic-gate /* 165*0Sstevel@tonic-gate * Collect number up to ``.''. 166*0Sstevel@tonic-gate * Values are specified as for C: 167*0Sstevel@tonic-gate * 0x=hex, 0=octal, other=decimal. 168*0Sstevel@tonic-gate */ 169*0Sstevel@tonic-gate val = 0; base = 10; 170*0Sstevel@tonic-gate if (*cp == '0') { 171*0Sstevel@tonic-gate if (*++cp == 'x' || *cp == 'X') 172*0Sstevel@tonic-gate base = 16, cp++; 173*0Sstevel@tonic-gate else 174*0Sstevel@tonic-gate base = 8; 175*0Sstevel@tonic-gate } 176*0Sstevel@tonic-gate 177*0Sstevel@tonic-gate while ((c = *cp) != 0) { 178*0Sstevel@tonic-gate if (isdigit(c)) { 179*0Sstevel@tonic-gate if ((c - '0') >= base) 180*0Sstevel@tonic-gate break; 181*0Sstevel@tonic-gate val = (val * base) + (c - '0'); 182*0Sstevel@tonic-gate cp++; 183*0Sstevel@tonic-gate continue; 184*0Sstevel@tonic-gate } 185*0Sstevel@tonic-gate if (base == 16 && isxdigit(c)) { 186*0Sstevel@tonic-gate val = (val << 4) + (c + 10 - (islower(c) ? 'a' : 'A')); 187*0Sstevel@tonic-gate cp++; 188*0Sstevel@tonic-gate continue; 189*0Sstevel@tonic-gate } 190*0Sstevel@tonic-gate break; 191*0Sstevel@tonic-gate } 192*0Sstevel@tonic-gate if (*cp == '.') { 193*0Sstevel@tonic-gate /* 194*0Sstevel@tonic-gate * Internet format: 195*0Sstevel@tonic-gate * a.b.c.d 196*0Sstevel@tonic-gate * a.b.c (with c treated as 16-bits) 197*0Sstevel@tonic-gate * a.b (with b treated as 24 bits) 198*0Sstevel@tonic-gate */ 199*0Sstevel@tonic-gate if (pp >= parts + 4) 200*0Sstevel@tonic-gate return ((in_addr_t)-1); 201*0Sstevel@tonic-gate *pp++ = val, cp++; 202*0Sstevel@tonic-gate goto again; 203*0Sstevel@tonic-gate } 204*0Sstevel@tonic-gate /* 205*0Sstevel@tonic-gate * Check for trailing characters. 206*0Sstevel@tonic-gate */ 207*0Sstevel@tonic-gate if (*cp && !isspace(*cp)) 208*0Sstevel@tonic-gate return ((in_addr_t)-1); 209*0Sstevel@tonic-gate *pp++ = val; 210*0Sstevel@tonic-gate /* 211*0Sstevel@tonic-gate * Concoct the address according to 212*0Sstevel@tonic-gate * the number of parts specified. 213*0Sstevel@tonic-gate */ 214*0Sstevel@tonic-gate n = pp - parts; 215*0Sstevel@tonic-gate switch (n) { 216*0Sstevel@tonic-gate 217*0Sstevel@tonic-gate case 1: /* a -- 32 bits */ 218*0Sstevel@tonic-gate val = parts[0]; 219*0Sstevel@tonic-gate break; 220*0Sstevel@tonic-gate 221*0Sstevel@tonic-gate case 2: /* a.b -- 8.24 bits */ 222*0Sstevel@tonic-gate val = (parts[0] << 24) | (parts[1] & 0xffffff); 223*0Sstevel@tonic-gate break; 224*0Sstevel@tonic-gate 225*0Sstevel@tonic-gate case 3: /* a.b.c -- 8.8.16 bits */ 226*0Sstevel@tonic-gate val = (parts[0] << 24) | ((parts[1] & 0xff) << 16) | 227*0Sstevel@tonic-gate (parts[2] & 0xffff); 228*0Sstevel@tonic-gate break; 229*0Sstevel@tonic-gate 230*0Sstevel@tonic-gate case 4: /* a.b.c.d -- 8.8.8.8 bits */ 231*0Sstevel@tonic-gate val = (parts[0] << 24) | ((parts[1] & 0xff) << 16) | 232*0Sstevel@tonic-gate ((parts[2] & 0xff) << 8) | (parts[3] & 0xff); 233*0Sstevel@tonic-gate break; 234*0Sstevel@tonic-gate 235*0Sstevel@tonic-gate default: 236*0Sstevel@tonic-gate return ((in_addr_t)-1); 237*0Sstevel@tonic-gate } 238*0Sstevel@tonic-gate val = htonl(val); 239*0Sstevel@tonic-gate return (val); 240*0Sstevel@tonic-gate } 241