1*0Sstevel@tonic-gate /* 2*0Sstevel@tonic-gate * Copyright 2001-2002 Sun Microsystems, Inc. All rights reserved. 3*0Sstevel@tonic-gate * Use is subject to license terms. 4*0Sstevel@tonic-gate */ 5*0Sstevel@tonic-gate 6*0Sstevel@tonic-gate /* 7*0Sstevel@tonic-gate * Copyright (c) 1998-1999 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: gethostent_r.c,v 8.7 2001/11/01 08:02:09 marka Exp $"; 27*0Sstevel@tonic-gate #endif /* LIBC_SCCS and not lint */ 28*0Sstevel@tonic-gate 29*0Sstevel@tonic-gate #include <port_before.h> 30*0Sstevel@tonic-gate #if !defined(_REENTRANT) || !defined(DO_PTHREADS) 31*0Sstevel@tonic-gate static int gethostent_r_not_required = 0; 32*0Sstevel@tonic-gate #else 33*0Sstevel@tonic-gate #include <errno.h> 34*0Sstevel@tonic-gate #include <string.h> 35*0Sstevel@tonic-gate #include <stdio.h> 36*0Sstevel@tonic-gate #include <sys/types.h> 37*0Sstevel@tonic-gate #include <netinet/in.h> 38*0Sstevel@tonic-gate #include <netdb.h> 39*0Sstevel@tonic-gate #include <sys/param.h> 40*0Sstevel@tonic-gate #include <port_after.h> 41*0Sstevel@tonic-gate 42*0Sstevel@tonic-gate #ifdef HOST_R_RETURN 43*0Sstevel@tonic-gate 44*0Sstevel@tonic-gate static HOST_R_RETURN 45*0Sstevel@tonic-gate copy_hostent(struct hostent *, struct hostent *, HOST_R_COPY_ARGS); 46*0Sstevel@tonic-gate 47*0Sstevel@tonic-gate HOST_R_RETURN 48*0Sstevel@tonic-gate gethostbyname_r(const char *name, struct hostent *hptr, HOST_R_ARGS) { 49*0Sstevel@tonic-gate struct hostent *he = gethostbyname(name); 50*0Sstevel@tonic-gate #ifdef HOST_R_SETANSWER 51*0Sstevel@tonic-gate int n = 0; 52*0Sstevel@tonic-gate #endif 53*0Sstevel@tonic-gate 54*0Sstevel@tonic-gate HOST_R_ERRNO; 55*0Sstevel@tonic-gate 56*0Sstevel@tonic-gate #ifdef HOST_R_SETANSWER 57*0Sstevel@tonic-gate if (he == NULL || (n = copy_hostent(he, hptr, HOST_R_COPY)) == 0) 58*0Sstevel@tonic-gate *answerp = NULL; 59*0Sstevel@tonic-gate else 60*0Sstevel@tonic-gate *answerp = hptr; 61*0Sstevel@tonic-gate 62*0Sstevel@tonic-gate return (n); 63*0Sstevel@tonic-gate #else 64*0Sstevel@tonic-gate if (he == NULL) 65*0Sstevel@tonic-gate return (HOST_R_BAD); 66*0Sstevel@tonic-gate 67*0Sstevel@tonic-gate return (copy_hostent(he, hptr, HOST_R_COPY)); 68*0Sstevel@tonic-gate #endif 69*0Sstevel@tonic-gate } 70*0Sstevel@tonic-gate 71*0Sstevel@tonic-gate HOST_R_RETURN 72*0Sstevel@tonic-gate gethostbyaddr_r(const char *addr, int len, int type, 73*0Sstevel@tonic-gate struct hostent *hptr, HOST_R_ARGS) { 74*0Sstevel@tonic-gate struct hostent *he = gethostbyaddr(addr, len, type); 75*0Sstevel@tonic-gate #ifdef HOST_R_SETANSWER 76*0Sstevel@tonic-gate int n = 0; 77*0Sstevel@tonic-gate #endif 78*0Sstevel@tonic-gate 79*0Sstevel@tonic-gate HOST_R_ERRNO; 80*0Sstevel@tonic-gate 81*0Sstevel@tonic-gate #ifdef HOST_R_SETANSWER 82*0Sstevel@tonic-gate if (he == NULL || (n = copy_hostent(he, hptr, HOST_R_COPY)) == 0) 83*0Sstevel@tonic-gate *answerp = NULL; 84*0Sstevel@tonic-gate else 85*0Sstevel@tonic-gate *answerp = hptr; 86*0Sstevel@tonic-gate 87*0Sstevel@tonic-gate return (n); 88*0Sstevel@tonic-gate #else 89*0Sstevel@tonic-gate if (he == NULL) 90*0Sstevel@tonic-gate return (HOST_R_BAD); 91*0Sstevel@tonic-gate 92*0Sstevel@tonic-gate return (copy_hostent(he, hptr, HOST_R_COPY)); 93*0Sstevel@tonic-gate #endif 94*0Sstevel@tonic-gate } 95*0Sstevel@tonic-gate 96*0Sstevel@tonic-gate /* 97*0Sstevel@tonic-gate * These assume a single context is in operation per thread. 98*0Sstevel@tonic-gate * If this is not the case we will need to call irs directly 99*0Sstevel@tonic-gate * rather than through the base functions. 100*0Sstevel@tonic-gate */ 101*0Sstevel@tonic-gate 102*0Sstevel@tonic-gate HOST_R_RETURN 103*0Sstevel@tonic-gate gethostent_r(struct hostent *hptr, HOST_R_ARGS) { 104*0Sstevel@tonic-gate struct hostent *he = gethostent(); 105*0Sstevel@tonic-gate #ifdef HOST_R_SETANSWER 106*0Sstevel@tonic-gate int n = 0; 107*0Sstevel@tonic-gate #endif 108*0Sstevel@tonic-gate 109*0Sstevel@tonic-gate HOST_R_ERRNO; 110*0Sstevel@tonic-gate 111*0Sstevel@tonic-gate #ifdef HOST_R_SETANSWER 112*0Sstevel@tonic-gate if (he == NULL || (n = copy_hostent(he, hptr, HOST_R_COPY)) == 0) 113*0Sstevel@tonic-gate *answerp = NULL; 114*0Sstevel@tonic-gate else 115*0Sstevel@tonic-gate *answerp = hptr; 116*0Sstevel@tonic-gate 117*0Sstevel@tonic-gate return (n); 118*0Sstevel@tonic-gate #else 119*0Sstevel@tonic-gate if (he == NULL) 120*0Sstevel@tonic-gate return (HOST_R_BAD); 121*0Sstevel@tonic-gate 122*0Sstevel@tonic-gate return (copy_hostent(he, hptr, HOST_R_COPY)); 123*0Sstevel@tonic-gate #endif 124*0Sstevel@tonic-gate } 125*0Sstevel@tonic-gate 126*0Sstevel@tonic-gate HOST_R_SET_RETURN 127*0Sstevel@tonic-gate #ifdef HOST_R_ENT_ARGS 128*0Sstevel@tonic-gate sethostent_r(int stay_open, HOST_R_ENT_ARGS) 129*0Sstevel@tonic-gate #else 130*0Sstevel@tonic-gate sethostent_r(int stay_open) 131*0Sstevel@tonic-gate #endif 132*0Sstevel@tonic-gate { 133*0Sstevel@tonic-gate sethostent(stay_open); 134*0Sstevel@tonic-gate #ifdef HOST_R_SET_RESULT 135*0Sstevel@tonic-gate return (HOST_R_SET_RESULT); 136*0Sstevel@tonic-gate #endif 137*0Sstevel@tonic-gate } 138*0Sstevel@tonic-gate 139*0Sstevel@tonic-gate HOST_R_END_RETURN 140*0Sstevel@tonic-gate #ifdef HOST_R_ENT_ARGS 141*0Sstevel@tonic-gate endhostent_r(HOST_R_ENT_ARGS) 142*0Sstevel@tonic-gate #else 143*0Sstevel@tonic-gate endhostent_r(void) 144*0Sstevel@tonic-gate #endif 145*0Sstevel@tonic-gate { 146*0Sstevel@tonic-gate endhostent(); 147*0Sstevel@tonic-gate HOST_R_END_RESULT(HOST_R_OK); 148*0Sstevel@tonic-gate } 149*0Sstevel@tonic-gate 150*0Sstevel@tonic-gate /* Private */ 151*0Sstevel@tonic-gate 152*0Sstevel@tonic-gate #ifndef HOSTENT_DATA 153*0Sstevel@tonic-gate static HOST_R_RETURN 154*0Sstevel@tonic-gate copy_hostent(struct hostent *he, struct hostent *hptr, HOST_R_COPY_ARGS) { 155*0Sstevel@tonic-gate char *cp; 156*0Sstevel@tonic-gate char **ptr; 157*0Sstevel@tonic-gate int i, n; 158*0Sstevel@tonic-gate int nptr, len; 159*0Sstevel@tonic-gate 160*0Sstevel@tonic-gate /* Find out the amount of space required to store the answer. */ 161*0Sstevel@tonic-gate nptr = 2; /* NULL ptrs */ 162*0Sstevel@tonic-gate len = (char *)ALIGN(buf) - buf; 163*0Sstevel@tonic-gate for (i = 0; he->h_addr_list[i]; i++, nptr++) { 164*0Sstevel@tonic-gate len += he->h_length; 165*0Sstevel@tonic-gate } 166*0Sstevel@tonic-gate for (i = 0; he->h_aliases[i]; i++, nptr++) { 167*0Sstevel@tonic-gate len += strlen(he->h_aliases[i]) + 1; 168*0Sstevel@tonic-gate } 169*0Sstevel@tonic-gate len += strlen(he->h_name) + 1; 170*0Sstevel@tonic-gate len += nptr * sizeof(char*); 171*0Sstevel@tonic-gate 172*0Sstevel@tonic-gate if (len > buflen) { 173*0Sstevel@tonic-gate errno = ERANGE; 174*0Sstevel@tonic-gate return (HOST_R_BAD); 175*0Sstevel@tonic-gate } 176*0Sstevel@tonic-gate 177*0Sstevel@tonic-gate /* copy address size and type */ 178*0Sstevel@tonic-gate hptr->h_addrtype = he->h_addrtype; 179*0Sstevel@tonic-gate n = hptr->h_length = he->h_length; 180*0Sstevel@tonic-gate 181*0Sstevel@tonic-gate ptr = (char **)ALIGN(buf); 182*0Sstevel@tonic-gate cp = (char *)ALIGN(buf) + nptr * sizeof(char *); 183*0Sstevel@tonic-gate 184*0Sstevel@tonic-gate /* copy address list */ 185*0Sstevel@tonic-gate hptr->h_addr_list = ptr; 186*0Sstevel@tonic-gate for (i = 0; he->h_addr_list[i]; i++ , ptr++) { 187*0Sstevel@tonic-gate memcpy(cp, he->h_addr_list[i], n); 188*0Sstevel@tonic-gate hptr->h_addr_list[i] = cp; 189*0Sstevel@tonic-gate cp += n; 190*0Sstevel@tonic-gate } 191*0Sstevel@tonic-gate hptr->h_addr_list[i] = NULL; 192*0Sstevel@tonic-gate ptr++; 193*0Sstevel@tonic-gate 194*0Sstevel@tonic-gate /* copy official name */ 195*0Sstevel@tonic-gate n = strlen(he->h_name) + 1; 196*0Sstevel@tonic-gate strcpy(cp, he->h_name); 197*0Sstevel@tonic-gate hptr->h_name = cp; 198*0Sstevel@tonic-gate cp += n; 199*0Sstevel@tonic-gate 200*0Sstevel@tonic-gate /* copy aliases */ 201*0Sstevel@tonic-gate hptr->h_aliases = ptr; 202*0Sstevel@tonic-gate for (i = 0 ; he->h_aliases[i]; i++) { 203*0Sstevel@tonic-gate n = strlen(he->h_aliases[i]) + 1; 204*0Sstevel@tonic-gate strcpy(cp, he->h_aliases[i]); 205*0Sstevel@tonic-gate hptr->h_aliases[i] = cp; 206*0Sstevel@tonic-gate cp += n; 207*0Sstevel@tonic-gate } 208*0Sstevel@tonic-gate hptr->h_aliases[i] = NULL; 209*0Sstevel@tonic-gate 210*0Sstevel@tonic-gate return (HOST_R_OK); 211*0Sstevel@tonic-gate } 212*0Sstevel@tonic-gate #else /* !HOSTENT_DATA */ 213*0Sstevel@tonic-gate static int 214*0Sstevel@tonic-gate copy_hostent(struct hostent *he, struct hostent *hptr, HOST_R_COPY_ARGS) { 215*0Sstevel@tonic-gate char *cp, *eob; 216*0Sstevel@tonic-gate int i, n; 217*0Sstevel@tonic-gate 218*0Sstevel@tonic-gate /* copy address size and type */ 219*0Sstevel@tonic-gate hptr->h_addrtype = he->h_addrtype; 220*0Sstevel@tonic-gate n = hptr->h_length = he->h_length; 221*0Sstevel@tonic-gate 222*0Sstevel@tonic-gate /* copy up to first 35 addresses */ 223*0Sstevel@tonic-gate i = 0; 224*0Sstevel@tonic-gate cp = hdptr->hostaddr; 225*0Sstevel@tonic-gate eob = hdptr->hostaddr + sizeof(hdptr->hostaddr); 226*0Sstevel@tonic-gate hptr->h_addr_list = hdptr->h_addr_ptrs; 227*0Sstevel@tonic-gate while (he->h_addr_list[i] && i < (_MAXADDRS)) { 228*0Sstevel@tonic-gate if (n < (eob - cp)) { 229*0Sstevel@tonic-gate memcpy(cp, he->h_addr_list[i], n); 230*0Sstevel@tonic-gate hptr->h_addr_list[i] = cp; 231*0Sstevel@tonic-gate cp += n; 232*0Sstevel@tonic-gate } else { 233*0Sstevel@tonic-gate break; 234*0Sstevel@tonic-gate } 235*0Sstevel@tonic-gate i++; 236*0Sstevel@tonic-gate } 237*0Sstevel@tonic-gate hptr->h_addr_list[i] = NULL; 238*0Sstevel@tonic-gate 239*0Sstevel@tonic-gate /* copy official name */ 240*0Sstevel@tonic-gate cp = hdptr->hostbuf; 241*0Sstevel@tonic-gate eob = hdptr->hostbuf + sizeof(hdptr->hostbuf); 242*0Sstevel@tonic-gate if ((n = strlen(he->h_name) + 1) < (eob - cp)) { 243*0Sstevel@tonic-gate strcpy(cp, he->h_name); 244*0Sstevel@tonic-gate hptr->h_name = cp; 245*0Sstevel@tonic-gate cp += n; 246*0Sstevel@tonic-gate } else { 247*0Sstevel@tonic-gate return (-1); 248*0Sstevel@tonic-gate } 249*0Sstevel@tonic-gate 250*0Sstevel@tonic-gate /* copy aliases */ 251*0Sstevel@tonic-gate i = 0; 252*0Sstevel@tonic-gate hptr->h_aliases = hdptr->host_aliases; 253*0Sstevel@tonic-gate while (he->h_aliases[i] && i < (_MAXALIASES-1)) { 254*0Sstevel@tonic-gate if ((n = strlen(he->h_aliases[i]) + 1) < (eob - cp)) { 255*0Sstevel@tonic-gate strcpy(cp, he->h_aliases[i]); 256*0Sstevel@tonic-gate hptr->h_aliases[i] = cp; 257*0Sstevel@tonic-gate cp += n; 258*0Sstevel@tonic-gate } else { 259*0Sstevel@tonic-gate break; 260*0Sstevel@tonic-gate } 261*0Sstevel@tonic-gate i++; 262*0Sstevel@tonic-gate } 263*0Sstevel@tonic-gate hptr->h_aliases[i] = NULL; 264*0Sstevel@tonic-gate 265*0Sstevel@tonic-gate return (HOST_R_OK); 266*0Sstevel@tonic-gate } 267*0Sstevel@tonic-gate #endif /* !HOSTENT_DATA */ 268*0Sstevel@tonic-gate #else /* HOST_R_RETURN */ 269*0Sstevel@tonic-gate static int gethostent_r_unknown_system = 0; 270*0Sstevel@tonic-gate #endif /* HOST_R_RETURN */ 271*0Sstevel@tonic-gate #endif /* !defined(_REENTRANT) || !defined(DO_PTHREADS) */ 272