1*0Sstevel@tonic-gate /* 2*0Sstevel@tonic-gate * Copyright 1997-2002 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) 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: gen_ho.c,v 1.16 2001/05/29 05:48:36 marka Exp $"; 27*0Sstevel@tonic-gate #endif /* LIBC_SCCS and not lint */ 28*0Sstevel@tonic-gate 29*0Sstevel@tonic-gate /* Imports */ 30*0Sstevel@tonic-gate 31*0Sstevel@tonic-gate #include "port_before.h" 32*0Sstevel@tonic-gate 33*0Sstevel@tonic-gate #include <sys/types.h> 34*0Sstevel@tonic-gate 35*0Sstevel@tonic-gate #include <netinet/in.h> 36*0Sstevel@tonic-gate #include <arpa/nameser.h> 37*0Sstevel@tonic-gate 38*0Sstevel@tonic-gate #include <errno.h> 39*0Sstevel@tonic-gate #include <stdlib.h> 40*0Sstevel@tonic-gate #include <netdb.h> 41*0Sstevel@tonic-gate #include <resolv.h> 42*0Sstevel@tonic-gate #include <stdio.h> 43*0Sstevel@tonic-gate #include <string.h> 44*0Sstevel@tonic-gate 45*0Sstevel@tonic-gate #include <isc/memcluster.h> 46*0Sstevel@tonic-gate #include <irs.h> 47*0Sstevel@tonic-gate 48*0Sstevel@tonic-gate #include "port_after.h" 49*0Sstevel@tonic-gate 50*0Sstevel@tonic-gate #include "irs_p.h" 51*0Sstevel@tonic-gate #include "gen_p.h" 52*0Sstevel@tonic-gate 53*0Sstevel@tonic-gate /* Definitions */ 54*0Sstevel@tonic-gate 55*0Sstevel@tonic-gate struct pvt { 56*0Sstevel@tonic-gate struct irs_rule * rules; 57*0Sstevel@tonic-gate struct irs_rule * rule; 58*0Sstevel@tonic-gate struct irs_ho * ho; 59*0Sstevel@tonic-gate struct __res_state * res; 60*0Sstevel@tonic-gate void (*free_res)(void *); 61*0Sstevel@tonic-gate }; 62*0Sstevel@tonic-gate 63*0Sstevel@tonic-gate /* Forwards */ 64*0Sstevel@tonic-gate 65*0Sstevel@tonic-gate static void ho_close(struct irs_ho *this); 66*0Sstevel@tonic-gate static struct hostent * ho_byname(struct irs_ho *this, const char *name); 67*0Sstevel@tonic-gate static struct hostent * ho_byname2(struct irs_ho *this, const char *name, 68*0Sstevel@tonic-gate int af); 69*0Sstevel@tonic-gate static struct hostent * ho_byaddr(struct irs_ho *this, const void *addr, 70*0Sstevel@tonic-gate int len, int af); 71*0Sstevel@tonic-gate static struct hostent * ho_next(struct irs_ho *this); 72*0Sstevel@tonic-gate static void ho_rewind(struct irs_ho *this); 73*0Sstevel@tonic-gate static void ho_minimize(struct irs_ho *this); 74*0Sstevel@tonic-gate static struct __res_state * ho_res_get(struct irs_ho *this); 75*0Sstevel@tonic-gate static void ho_res_set(struct irs_ho *this, 76*0Sstevel@tonic-gate struct __res_state *res, 77*0Sstevel@tonic-gate void (*free_res)(void *)); 78*0Sstevel@tonic-gate static struct addrinfo * ho_addrinfo(struct irs_ho *this, const char *name, 79*0Sstevel@tonic-gate const struct addrinfo *pai); 80*0Sstevel@tonic-gate 81*0Sstevel@tonic-gate static int init(struct irs_ho *this); 82*0Sstevel@tonic-gate 83*0Sstevel@tonic-gate /* Exports */ 84*0Sstevel@tonic-gate 85*0Sstevel@tonic-gate struct irs_ho * 86*0Sstevel@tonic-gate irs_gen_ho(struct irs_acc *this) { 87*0Sstevel@tonic-gate struct gen_p *accpvt = (struct gen_p *)this->private; 88*0Sstevel@tonic-gate struct irs_ho *ho; 89*0Sstevel@tonic-gate struct pvt *pvt; 90*0Sstevel@tonic-gate 91*0Sstevel@tonic-gate if (!(pvt = memget(sizeof *pvt))) { 92*0Sstevel@tonic-gate errno = ENOMEM; 93*0Sstevel@tonic-gate return (NULL); 94*0Sstevel@tonic-gate } 95*0Sstevel@tonic-gate memset(pvt, 0, sizeof *pvt); 96*0Sstevel@tonic-gate if (!(ho = memget(sizeof *ho))) { 97*0Sstevel@tonic-gate memput(pvt, sizeof *pvt); 98*0Sstevel@tonic-gate errno = ENOMEM; 99*0Sstevel@tonic-gate return (NULL); 100*0Sstevel@tonic-gate } 101*0Sstevel@tonic-gate memset(ho, 0x5e, sizeof *ho); 102*0Sstevel@tonic-gate pvt->rules = accpvt->map_rules[irs_ho]; 103*0Sstevel@tonic-gate pvt->rule = pvt->rules; 104*0Sstevel@tonic-gate ho->private = pvt; 105*0Sstevel@tonic-gate ho->close = ho_close; 106*0Sstevel@tonic-gate ho->byname = ho_byname; 107*0Sstevel@tonic-gate ho->byname2 = ho_byname2; 108*0Sstevel@tonic-gate ho->byaddr = ho_byaddr; 109*0Sstevel@tonic-gate ho->next = ho_next; 110*0Sstevel@tonic-gate ho->rewind = ho_rewind; 111*0Sstevel@tonic-gate ho->minimize = ho_minimize; 112*0Sstevel@tonic-gate ho->res_get = ho_res_get; 113*0Sstevel@tonic-gate ho->res_set = ho_res_set; 114*0Sstevel@tonic-gate ho->addrinfo = ho_addrinfo; 115*0Sstevel@tonic-gate return (ho); 116*0Sstevel@tonic-gate } 117*0Sstevel@tonic-gate 118*0Sstevel@tonic-gate /* Methods. */ 119*0Sstevel@tonic-gate 120*0Sstevel@tonic-gate static void 121*0Sstevel@tonic-gate ho_close(struct irs_ho *this) { 122*0Sstevel@tonic-gate struct pvt *pvt = (struct pvt *)this->private; 123*0Sstevel@tonic-gate 124*0Sstevel@tonic-gate ho_minimize(this); 125*0Sstevel@tonic-gate if (pvt->res && pvt->free_res) 126*0Sstevel@tonic-gate (*pvt->free_res)(pvt->res); 127*0Sstevel@tonic-gate memput(pvt, sizeof *pvt); 128*0Sstevel@tonic-gate memput(this, sizeof *this); 129*0Sstevel@tonic-gate } 130*0Sstevel@tonic-gate 131*0Sstevel@tonic-gate static struct hostent * 132*0Sstevel@tonic-gate ho_byname(struct irs_ho *this, const char *name) { 133*0Sstevel@tonic-gate struct pvt *pvt = (struct pvt *)this->private; 134*0Sstevel@tonic-gate struct irs_rule *rule; 135*0Sstevel@tonic-gate struct hostent *rval; 136*0Sstevel@tonic-gate struct irs_ho *ho; 137*0Sstevel@tonic-gate int therrno = NETDB_INTERNAL; 138*0Sstevel@tonic-gate int softerror = 0; 139*0Sstevel@tonic-gate 140*0Sstevel@tonic-gate if (init(this) == -1) 141*0Sstevel@tonic-gate return (NULL); 142*0Sstevel@tonic-gate 143*0Sstevel@tonic-gate for (rule = pvt->rules; rule; rule = rule->next) { 144*0Sstevel@tonic-gate ho = rule->inst->ho; 145*0Sstevel@tonic-gate RES_SET_H_ERRNO(pvt->res, NETDB_INTERNAL); 146*0Sstevel@tonic-gate errno = 0; 147*0Sstevel@tonic-gate rval = (*ho->byname)(ho, name); 148*0Sstevel@tonic-gate if (rval != NULL) 149*0Sstevel@tonic-gate return (rval); 150*0Sstevel@tonic-gate if (softerror == 0 && 151*0Sstevel@tonic-gate pvt->res->res_h_errno != HOST_NOT_FOUND && 152*0Sstevel@tonic-gate pvt->res->res_h_errno != NETDB_INTERNAL) { 153*0Sstevel@tonic-gate softerror = 1; 154*0Sstevel@tonic-gate therrno = pvt->res->res_h_errno; 155*0Sstevel@tonic-gate } 156*0Sstevel@tonic-gate if (rule->flags & IRS_CONTINUE) 157*0Sstevel@tonic-gate continue; 158*0Sstevel@tonic-gate /* 159*0Sstevel@tonic-gate * The value TRY_AGAIN can mean that the service 160*0Sstevel@tonic-gate * is not available, or just that this particular name 161*0Sstevel@tonic-gate * cannot be resolved now. We use the errno ECONNREFUSED 162*0Sstevel@tonic-gate * to distinguish. If a lookup sets that errno when 163*0Sstevel@tonic-gate * H_ERRNO is TRY_AGAIN, we continue to try other lookup 164*0Sstevel@tonic-gate * functions, otherwise we return the TRY_AGAIN error. 165*0Sstevel@tonic-gate */ 166*0Sstevel@tonic-gate if (pvt->res->res_h_errno != TRY_AGAIN || errno != ECONNREFUSED) 167*0Sstevel@tonic-gate break; 168*0Sstevel@tonic-gate } 169*0Sstevel@tonic-gate if (softerror != 0 && pvt->res->res_h_errno == HOST_NOT_FOUND) 170*0Sstevel@tonic-gate RES_SET_H_ERRNO(pvt->res, therrno); 171*0Sstevel@tonic-gate return (NULL); 172*0Sstevel@tonic-gate } 173*0Sstevel@tonic-gate 174*0Sstevel@tonic-gate static struct hostent * 175*0Sstevel@tonic-gate ho_byname2(struct irs_ho *this, const char *name, int af) { 176*0Sstevel@tonic-gate struct pvt *pvt = (struct pvt *)this->private; 177*0Sstevel@tonic-gate struct irs_rule *rule; 178*0Sstevel@tonic-gate struct hostent *rval; 179*0Sstevel@tonic-gate struct irs_ho *ho; 180*0Sstevel@tonic-gate int therrno = NETDB_INTERNAL; 181*0Sstevel@tonic-gate int softerror = 0; 182*0Sstevel@tonic-gate 183*0Sstevel@tonic-gate if (init(this) == -1) 184*0Sstevel@tonic-gate return (NULL); 185*0Sstevel@tonic-gate 186*0Sstevel@tonic-gate for (rule = pvt->rules; rule; rule = rule->next) { 187*0Sstevel@tonic-gate ho = rule->inst->ho; 188*0Sstevel@tonic-gate RES_SET_H_ERRNO(pvt->res, NETDB_INTERNAL); 189*0Sstevel@tonic-gate errno = 0; 190*0Sstevel@tonic-gate rval = (*ho->byname2)(ho, name, af); 191*0Sstevel@tonic-gate if (rval != NULL) 192*0Sstevel@tonic-gate return (rval); 193*0Sstevel@tonic-gate if (softerror == 0 && 194*0Sstevel@tonic-gate pvt->res->res_h_errno != HOST_NOT_FOUND && 195*0Sstevel@tonic-gate pvt->res->res_h_errno != NETDB_INTERNAL) { 196*0Sstevel@tonic-gate softerror = 1; 197*0Sstevel@tonic-gate therrno = pvt->res->res_h_errno; 198*0Sstevel@tonic-gate } 199*0Sstevel@tonic-gate if (rule->flags & IRS_CONTINUE) 200*0Sstevel@tonic-gate continue; 201*0Sstevel@tonic-gate /* 202*0Sstevel@tonic-gate * See the comments in ho_byname() explaining 203*0Sstevel@tonic-gate * the interpretation of TRY_AGAIN and ECONNREFUSED. 204*0Sstevel@tonic-gate */ 205*0Sstevel@tonic-gate if (pvt->res->res_h_errno != TRY_AGAIN || errno != ECONNREFUSED) 206*0Sstevel@tonic-gate break; 207*0Sstevel@tonic-gate } 208*0Sstevel@tonic-gate if (softerror != 0 && pvt->res->res_h_errno == HOST_NOT_FOUND) 209*0Sstevel@tonic-gate RES_SET_H_ERRNO(pvt->res, therrno); 210*0Sstevel@tonic-gate return (NULL); 211*0Sstevel@tonic-gate } 212*0Sstevel@tonic-gate 213*0Sstevel@tonic-gate static struct hostent * 214*0Sstevel@tonic-gate ho_byaddr(struct irs_ho *this, const void *addr, int len, int af) { 215*0Sstevel@tonic-gate struct pvt *pvt = (struct pvt *)this->private; 216*0Sstevel@tonic-gate struct irs_rule *rule; 217*0Sstevel@tonic-gate struct hostent *rval; 218*0Sstevel@tonic-gate struct irs_ho *ho; 219*0Sstevel@tonic-gate int therrno = NETDB_INTERNAL; 220*0Sstevel@tonic-gate int softerror = 0; 221*0Sstevel@tonic-gate 222*0Sstevel@tonic-gate 223*0Sstevel@tonic-gate if (init(this) == -1) 224*0Sstevel@tonic-gate return (NULL); 225*0Sstevel@tonic-gate 226*0Sstevel@tonic-gate for (rule = pvt->rules; rule; rule = rule->next) { 227*0Sstevel@tonic-gate ho = rule->inst->ho; 228*0Sstevel@tonic-gate RES_SET_H_ERRNO(pvt->res, NETDB_INTERNAL); 229*0Sstevel@tonic-gate errno = 0; 230*0Sstevel@tonic-gate rval = (*ho->byaddr)(ho, addr, len, af); 231*0Sstevel@tonic-gate if (rval != NULL) 232*0Sstevel@tonic-gate return (rval); 233*0Sstevel@tonic-gate if (softerror == 0 && 234*0Sstevel@tonic-gate pvt->res->res_h_errno != HOST_NOT_FOUND && 235*0Sstevel@tonic-gate pvt->res->res_h_errno != NETDB_INTERNAL) { 236*0Sstevel@tonic-gate softerror = 1; 237*0Sstevel@tonic-gate therrno = pvt->res->res_h_errno; 238*0Sstevel@tonic-gate } 239*0Sstevel@tonic-gate 240*0Sstevel@tonic-gate if (rule->flags & IRS_CONTINUE) 241*0Sstevel@tonic-gate continue; 242*0Sstevel@tonic-gate /* 243*0Sstevel@tonic-gate * See the comments in ho_byname() explaining 244*0Sstevel@tonic-gate * the interpretation of TRY_AGAIN and ECONNREFUSED. 245*0Sstevel@tonic-gate */ 246*0Sstevel@tonic-gate if (pvt->res->res_h_errno != TRY_AGAIN || errno != ECONNREFUSED) 247*0Sstevel@tonic-gate break; 248*0Sstevel@tonic-gate } 249*0Sstevel@tonic-gate if (softerror != 0 && pvt->res->res_h_errno == HOST_NOT_FOUND) 250*0Sstevel@tonic-gate RES_SET_H_ERRNO(pvt->res, therrno); 251*0Sstevel@tonic-gate return (NULL); 252*0Sstevel@tonic-gate } 253*0Sstevel@tonic-gate 254*0Sstevel@tonic-gate static struct hostent * 255*0Sstevel@tonic-gate ho_next(struct irs_ho *this) { 256*0Sstevel@tonic-gate struct pvt *pvt = (struct pvt *)this->private; 257*0Sstevel@tonic-gate struct hostent *rval; 258*0Sstevel@tonic-gate struct irs_ho *ho; 259*0Sstevel@tonic-gate 260*0Sstevel@tonic-gate while (pvt->rule) { 261*0Sstevel@tonic-gate ho = pvt->rule->inst->ho; 262*0Sstevel@tonic-gate rval = (*ho->next)(ho); 263*0Sstevel@tonic-gate if (rval) 264*0Sstevel@tonic-gate return (rval); 265*0Sstevel@tonic-gate if (!(pvt->rule->flags & IRS_CONTINUE)) 266*0Sstevel@tonic-gate break; 267*0Sstevel@tonic-gate pvt->rule = pvt->rule->next; 268*0Sstevel@tonic-gate if (pvt->rule) { 269*0Sstevel@tonic-gate ho = pvt->rule->inst->ho; 270*0Sstevel@tonic-gate (*ho->rewind)(ho); 271*0Sstevel@tonic-gate } 272*0Sstevel@tonic-gate } 273*0Sstevel@tonic-gate return (NULL); 274*0Sstevel@tonic-gate } 275*0Sstevel@tonic-gate 276*0Sstevel@tonic-gate static void 277*0Sstevel@tonic-gate ho_rewind(struct irs_ho *this) { 278*0Sstevel@tonic-gate struct pvt *pvt = (struct pvt *)this->private; 279*0Sstevel@tonic-gate struct irs_ho *ho; 280*0Sstevel@tonic-gate 281*0Sstevel@tonic-gate pvt->rule = pvt->rules; 282*0Sstevel@tonic-gate if (pvt->rule) { 283*0Sstevel@tonic-gate ho = pvt->rule->inst->ho; 284*0Sstevel@tonic-gate (*ho->rewind)(ho); 285*0Sstevel@tonic-gate } 286*0Sstevel@tonic-gate } 287*0Sstevel@tonic-gate 288*0Sstevel@tonic-gate static void 289*0Sstevel@tonic-gate ho_minimize(struct irs_ho *this) { 290*0Sstevel@tonic-gate struct pvt *pvt = (struct pvt *)this->private; 291*0Sstevel@tonic-gate struct irs_rule *rule; 292*0Sstevel@tonic-gate 293*0Sstevel@tonic-gate if (pvt->res) 294*0Sstevel@tonic-gate res_nclose(pvt->res); 295*0Sstevel@tonic-gate for (rule = pvt->rules; rule != NULL; rule = rule->next) { 296*0Sstevel@tonic-gate struct irs_ho *ho = rule->inst->ho; 297*0Sstevel@tonic-gate 298*0Sstevel@tonic-gate (*ho->minimize)(ho); 299*0Sstevel@tonic-gate } 300*0Sstevel@tonic-gate } 301*0Sstevel@tonic-gate 302*0Sstevel@tonic-gate static struct __res_state * 303*0Sstevel@tonic-gate ho_res_get(struct irs_ho *this) { 304*0Sstevel@tonic-gate struct pvt *pvt = (struct pvt *)this->private; 305*0Sstevel@tonic-gate 306*0Sstevel@tonic-gate if (!pvt->res) { 307*0Sstevel@tonic-gate struct __res_state *res; 308*0Sstevel@tonic-gate res = (struct __res_state *)malloc(sizeof *res); 309*0Sstevel@tonic-gate if (!res) { 310*0Sstevel@tonic-gate errno = ENOMEM; 311*0Sstevel@tonic-gate return (NULL); 312*0Sstevel@tonic-gate } 313*0Sstevel@tonic-gate memset(res, 0, sizeof *res); 314*0Sstevel@tonic-gate ho_res_set(this, res, free); 315*0Sstevel@tonic-gate } 316*0Sstevel@tonic-gate 317*0Sstevel@tonic-gate return (pvt->res); 318*0Sstevel@tonic-gate } 319*0Sstevel@tonic-gate 320*0Sstevel@tonic-gate static void 321*0Sstevel@tonic-gate ho_res_set(struct irs_ho *this, struct __res_state *res, 322*0Sstevel@tonic-gate void (*free_res)(void *)) { 323*0Sstevel@tonic-gate struct pvt *pvt = (struct pvt *)this->private; 324*0Sstevel@tonic-gate struct irs_rule *rule; 325*0Sstevel@tonic-gate 326*0Sstevel@tonic-gate if (pvt->res && pvt->free_res) { 327*0Sstevel@tonic-gate res_nclose(pvt->res); 328*0Sstevel@tonic-gate (*pvt->free_res)(pvt->res); 329*0Sstevel@tonic-gate } 330*0Sstevel@tonic-gate 331*0Sstevel@tonic-gate pvt->res = res; 332*0Sstevel@tonic-gate pvt->free_res = free_res; 333*0Sstevel@tonic-gate 334*0Sstevel@tonic-gate for (rule = pvt->rules; rule != NULL; rule = rule->next) { 335*0Sstevel@tonic-gate struct irs_ho *ho = rule->inst->ho; 336*0Sstevel@tonic-gate 337*0Sstevel@tonic-gate (*ho->res_set)(ho, pvt->res, NULL); 338*0Sstevel@tonic-gate } 339*0Sstevel@tonic-gate } 340*0Sstevel@tonic-gate 341*0Sstevel@tonic-gate static struct addrinfo * 342*0Sstevel@tonic-gate ho_addrinfo(struct irs_ho *this, const char *name, const struct addrinfo *pai) 343*0Sstevel@tonic-gate { 344*0Sstevel@tonic-gate struct pvt *pvt = (struct pvt *)this->private; 345*0Sstevel@tonic-gate struct irs_rule *rule; 346*0Sstevel@tonic-gate struct addrinfo *rval = NULL; 347*0Sstevel@tonic-gate struct irs_ho *ho; 348*0Sstevel@tonic-gate int therrno = NETDB_INTERNAL; 349*0Sstevel@tonic-gate int softerror = 0; 350*0Sstevel@tonic-gate 351*0Sstevel@tonic-gate if (init(this) == -1) 352*0Sstevel@tonic-gate return (NULL); 353*0Sstevel@tonic-gate 354*0Sstevel@tonic-gate for (rule = pvt->rules; rule; rule = rule->next) { 355*0Sstevel@tonic-gate ho = rule->inst->ho; 356*0Sstevel@tonic-gate RES_SET_H_ERRNO(pvt->res, NETDB_INTERNAL); 357*0Sstevel@tonic-gate errno = 0; 358*0Sstevel@tonic-gate if (ho->addrinfo == NULL) /* for safety */ 359*0Sstevel@tonic-gate continue; 360*0Sstevel@tonic-gate rval = (*ho->addrinfo)(ho, name, pai); 361*0Sstevel@tonic-gate if (rval != NULL) 362*0Sstevel@tonic-gate return (rval); 363*0Sstevel@tonic-gate if (softerror == 0 && 364*0Sstevel@tonic-gate pvt->res->res_h_errno != HOST_NOT_FOUND && 365*0Sstevel@tonic-gate pvt->res->res_h_errno != NETDB_INTERNAL) { 366*0Sstevel@tonic-gate softerror = 1; 367*0Sstevel@tonic-gate therrno = pvt->res->res_h_errno; 368*0Sstevel@tonic-gate } 369*0Sstevel@tonic-gate if (rule->flags & IRS_CONTINUE) 370*0Sstevel@tonic-gate continue; 371*0Sstevel@tonic-gate /* 372*0Sstevel@tonic-gate * See the comments in ho_byname() explaining 373*0Sstevel@tonic-gate * the interpretation of TRY_AGAIN and ECONNREFUSED. 374*0Sstevel@tonic-gate */ 375*0Sstevel@tonic-gate if (pvt->res->res_h_errno != TRY_AGAIN || 376*0Sstevel@tonic-gate errno != ECONNREFUSED) 377*0Sstevel@tonic-gate break; 378*0Sstevel@tonic-gate } 379*0Sstevel@tonic-gate if (softerror != 0 && pvt->res->res_h_errno == HOST_NOT_FOUND) 380*0Sstevel@tonic-gate RES_SET_H_ERRNO(pvt->res, therrno); 381*0Sstevel@tonic-gate if (rval) 382*0Sstevel@tonic-gate freeaddrinfo(rval); 383*0Sstevel@tonic-gate return (NULL); 384*0Sstevel@tonic-gate } 385*0Sstevel@tonic-gate 386*0Sstevel@tonic-gate static int 387*0Sstevel@tonic-gate init(struct irs_ho *this) { 388*0Sstevel@tonic-gate struct pvt *pvt = (struct pvt *)this->private; 389*0Sstevel@tonic-gate 390*0Sstevel@tonic-gate if (!pvt->res && !ho_res_get(this)) 391*0Sstevel@tonic-gate return (-1); 392*0Sstevel@tonic-gate 393*0Sstevel@tonic-gate if (((pvt->res->options & RES_INIT) == 0) && 394*0Sstevel@tonic-gate (res_ninit(pvt->res) == -1)) 395*0Sstevel@tonic-gate return (-1); 396*0Sstevel@tonic-gate 397*0Sstevel@tonic-gate return (0); 398*0Sstevel@tonic-gate } 399