10Sstevel@tonic-gate /* 2*11038SRao.Shoaib@Sun.COM * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC") 30Sstevel@tonic-gate * Copyright (c) 1996,1999 by Internet Software Consortium. 40Sstevel@tonic-gate * 50Sstevel@tonic-gate * Permission to use, copy, modify, and distribute this software for any 60Sstevel@tonic-gate * purpose with or without fee is hereby granted, provided that the above 70Sstevel@tonic-gate * copyright notice and this permission notice appear in all copies. 80Sstevel@tonic-gate * 9*11038SRao.Shoaib@Sun.COM * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES 10*11038SRao.Shoaib@Sun.COM * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 11*11038SRao.Shoaib@Sun.COM * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR 12*11038SRao.Shoaib@Sun.COM * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 13*11038SRao.Shoaib@Sun.COM * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 14*11038SRao.Shoaib@Sun.COM * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT 15*11038SRao.Shoaib@Sun.COM * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 160Sstevel@tonic-gate */ 170Sstevel@tonic-gate 180Sstevel@tonic-gate #if defined(LIBC_SCCS) && !defined(lint) 19*11038SRao.Shoaib@Sun.COM static const char rcsid[] = "$Id: gen_ho.c,v 1.5 2006/03/09 23:57:56 marka Exp $"; 200Sstevel@tonic-gate #endif /* LIBC_SCCS and not lint */ 210Sstevel@tonic-gate 220Sstevel@tonic-gate /* Imports */ 230Sstevel@tonic-gate 240Sstevel@tonic-gate #include "port_before.h" 250Sstevel@tonic-gate 260Sstevel@tonic-gate #include <sys/types.h> 270Sstevel@tonic-gate 280Sstevel@tonic-gate #include <netinet/in.h> 290Sstevel@tonic-gate #include <arpa/nameser.h> 300Sstevel@tonic-gate 310Sstevel@tonic-gate #include <errno.h> 320Sstevel@tonic-gate #include <stdlib.h> 330Sstevel@tonic-gate #include <netdb.h> 340Sstevel@tonic-gate #include <resolv.h> 350Sstevel@tonic-gate #include <stdio.h> 360Sstevel@tonic-gate #include <string.h> 370Sstevel@tonic-gate 380Sstevel@tonic-gate #include <isc/memcluster.h> 390Sstevel@tonic-gate #include <irs.h> 400Sstevel@tonic-gate 410Sstevel@tonic-gate #include "port_after.h" 420Sstevel@tonic-gate 430Sstevel@tonic-gate #include "irs_p.h" 440Sstevel@tonic-gate #include "gen_p.h" 450Sstevel@tonic-gate 460Sstevel@tonic-gate /* Definitions */ 470Sstevel@tonic-gate 480Sstevel@tonic-gate struct pvt { 490Sstevel@tonic-gate struct irs_rule * rules; 500Sstevel@tonic-gate struct irs_rule * rule; 510Sstevel@tonic-gate struct irs_ho * ho; 520Sstevel@tonic-gate struct __res_state * res; 530Sstevel@tonic-gate void (*free_res)(void *); 540Sstevel@tonic-gate }; 550Sstevel@tonic-gate 560Sstevel@tonic-gate /* Forwards */ 570Sstevel@tonic-gate 580Sstevel@tonic-gate static void ho_close(struct irs_ho *this); 590Sstevel@tonic-gate static struct hostent * ho_byname(struct irs_ho *this, const char *name); 600Sstevel@tonic-gate static struct hostent * ho_byname2(struct irs_ho *this, const char *name, 610Sstevel@tonic-gate int af); 620Sstevel@tonic-gate static struct hostent * ho_byaddr(struct irs_ho *this, const void *addr, 630Sstevel@tonic-gate int len, int af); 640Sstevel@tonic-gate static struct hostent * ho_next(struct irs_ho *this); 650Sstevel@tonic-gate static void ho_rewind(struct irs_ho *this); 660Sstevel@tonic-gate static void ho_minimize(struct irs_ho *this); 670Sstevel@tonic-gate static struct __res_state * ho_res_get(struct irs_ho *this); 680Sstevel@tonic-gate static void ho_res_set(struct irs_ho *this, 690Sstevel@tonic-gate struct __res_state *res, 700Sstevel@tonic-gate void (*free_res)(void *)); 710Sstevel@tonic-gate static struct addrinfo * ho_addrinfo(struct irs_ho *this, const char *name, 720Sstevel@tonic-gate const struct addrinfo *pai); 730Sstevel@tonic-gate 740Sstevel@tonic-gate static int init(struct irs_ho *this); 750Sstevel@tonic-gate 760Sstevel@tonic-gate /* Exports */ 770Sstevel@tonic-gate 780Sstevel@tonic-gate struct irs_ho * 790Sstevel@tonic-gate irs_gen_ho(struct irs_acc *this) { 800Sstevel@tonic-gate struct gen_p *accpvt = (struct gen_p *)this->private; 810Sstevel@tonic-gate struct irs_ho *ho; 820Sstevel@tonic-gate struct pvt *pvt; 830Sstevel@tonic-gate 840Sstevel@tonic-gate if (!(pvt = memget(sizeof *pvt))) { 850Sstevel@tonic-gate errno = ENOMEM; 860Sstevel@tonic-gate return (NULL); 870Sstevel@tonic-gate } 880Sstevel@tonic-gate memset(pvt, 0, sizeof *pvt); 890Sstevel@tonic-gate if (!(ho = memget(sizeof *ho))) { 900Sstevel@tonic-gate memput(pvt, sizeof *pvt); 910Sstevel@tonic-gate errno = ENOMEM; 920Sstevel@tonic-gate return (NULL); 930Sstevel@tonic-gate } 940Sstevel@tonic-gate memset(ho, 0x5e, sizeof *ho); 950Sstevel@tonic-gate pvt->rules = accpvt->map_rules[irs_ho]; 960Sstevel@tonic-gate pvt->rule = pvt->rules; 970Sstevel@tonic-gate ho->private = pvt; 980Sstevel@tonic-gate ho->close = ho_close; 990Sstevel@tonic-gate ho->byname = ho_byname; 1000Sstevel@tonic-gate ho->byname2 = ho_byname2; 1010Sstevel@tonic-gate ho->byaddr = ho_byaddr; 1020Sstevel@tonic-gate ho->next = ho_next; 1030Sstevel@tonic-gate ho->rewind = ho_rewind; 1040Sstevel@tonic-gate ho->minimize = ho_minimize; 1050Sstevel@tonic-gate ho->res_get = ho_res_get; 1060Sstevel@tonic-gate ho->res_set = ho_res_set; 1070Sstevel@tonic-gate ho->addrinfo = ho_addrinfo; 1080Sstevel@tonic-gate return (ho); 1090Sstevel@tonic-gate } 1100Sstevel@tonic-gate 1110Sstevel@tonic-gate /* Methods. */ 1120Sstevel@tonic-gate 1130Sstevel@tonic-gate static void 1140Sstevel@tonic-gate ho_close(struct irs_ho *this) { 1150Sstevel@tonic-gate struct pvt *pvt = (struct pvt *)this->private; 1160Sstevel@tonic-gate 1170Sstevel@tonic-gate ho_minimize(this); 1180Sstevel@tonic-gate if (pvt->res && pvt->free_res) 1190Sstevel@tonic-gate (*pvt->free_res)(pvt->res); 1200Sstevel@tonic-gate memput(pvt, sizeof *pvt); 1210Sstevel@tonic-gate memput(this, sizeof *this); 1220Sstevel@tonic-gate } 1230Sstevel@tonic-gate 1240Sstevel@tonic-gate static struct hostent * 1250Sstevel@tonic-gate ho_byname(struct irs_ho *this, const char *name) { 1260Sstevel@tonic-gate struct pvt *pvt = (struct pvt *)this->private; 1270Sstevel@tonic-gate struct irs_rule *rule; 1280Sstevel@tonic-gate struct hostent *rval; 1290Sstevel@tonic-gate struct irs_ho *ho; 1300Sstevel@tonic-gate int therrno = NETDB_INTERNAL; 1310Sstevel@tonic-gate int softerror = 0; 1320Sstevel@tonic-gate 1330Sstevel@tonic-gate if (init(this) == -1) 1340Sstevel@tonic-gate return (NULL); 1350Sstevel@tonic-gate 1360Sstevel@tonic-gate for (rule = pvt->rules; rule; rule = rule->next) { 1370Sstevel@tonic-gate ho = rule->inst->ho; 1380Sstevel@tonic-gate RES_SET_H_ERRNO(pvt->res, NETDB_INTERNAL); 1390Sstevel@tonic-gate errno = 0; 1400Sstevel@tonic-gate rval = (*ho->byname)(ho, name); 1410Sstevel@tonic-gate if (rval != NULL) 1420Sstevel@tonic-gate return (rval); 1430Sstevel@tonic-gate if (softerror == 0 && 1440Sstevel@tonic-gate pvt->res->res_h_errno != HOST_NOT_FOUND && 1450Sstevel@tonic-gate pvt->res->res_h_errno != NETDB_INTERNAL) { 1460Sstevel@tonic-gate softerror = 1; 1470Sstevel@tonic-gate therrno = pvt->res->res_h_errno; 1480Sstevel@tonic-gate } 1490Sstevel@tonic-gate if (rule->flags & IRS_CONTINUE) 1500Sstevel@tonic-gate continue; 1510Sstevel@tonic-gate /* 1520Sstevel@tonic-gate * The value TRY_AGAIN can mean that the service 1530Sstevel@tonic-gate * is not available, or just that this particular name 1540Sstevel@tonic-gate * cannot be resolved now. We use the errno ECONNREFUSED 1550Sstevel@tonic-gate * to distinguish. If a lookup sets that errno when 1560Sstevel@tonic-gate * H_ERRNO is TRY_AGAIN, we continue to try other lookup 1570Sstevel@tonic-gate * functions, otherwise we return the TRY_AGAIN error. 1580Sstevel@tonic-gate */ 1590Sstevel@tonic-gate if (pvt->res->res_h_errno != TRY_AGAIN || errno != ECONNREFUSED) 1600Sstevel@tonic-gate break; 1610Sstevel@tonic-gate } 1620Sstevel@tonic-gate if (softerror != 0 && pvt->res->res_h_errno == HOST_NOT_FOUND) 1630Sstevel@tonic-gate RES_SET_H_ERRNO(pvt->res, therrno); 1640Sstevel@tonic-gate return (NULL); 1650Sstevel@tonic-gate } 1660Sstevel@tonic-gate 1670Sstevel@tonic-gate static struct hostent * 1680Sstevel@tonic-gate ho_byname2(struct irs_ho *this, const char *name, int af) { 1690Sstevel@tonic-gate struct pvt *pvt = (struct pvt *)this->private; 1700Sstevel@tonic-gate struct irs_rule *rule; 1710Sstevel@tonic-gate struct hostent *rval; 1720Sstevel@tonic-gate struct irs_ho *ho; 1730Sstevel@tonic-gate int therrno = NETDB_INTERNAL; 1740Sstevel@tonic-gate int softerror = 0; 1750Sstevel@tonic-gate 1760Sstevel@tonic-gate if (init(this) == -1) 1770Sstevel@tonic-gate return (NULL); 1780Sstevel@tonic-gate 1790Sstevel@tonic-gate for (rule = pvt->rules; rule; rule = rule->next) { 1800Sstevel@tonic-gate ho = rule->inst->ho; 1810Sstevel@tonic-gate RES_SET_H_ERRNO(pvt->res, NETDB_INTERNAL); 1820Sstevel@tonic-gate errno = 0; 1830Sstevel@tonic-gate rval = (*ho->byname2)(ho, name, af); 1840Sstevel@tonic-gate if (rval != NULL) 1850Sstevel@tonic-gate return (rval); 1860Sstevel@tonic-gate if (softerror == 0 && 1870Sstevel@tonic-gate pvt->res->res_h_errno != HOST_NOT_FOUND && 1880Sstevel@tonic-gate pvt->res->res_h_errno != NETDB_INTERNAL) { 1890Sstevel@tonic-gate softerror = 1; 1900Sstevel@tonic-gate therrno = pvt->res->res_h_errno; 1910Sstevel@tonic-gate } 1920Sstevel@tonic-gate if (rule->flags & IRS_CONTINUE) 1930Sstevel@tonic-gate continue; 1940Sstevel@tonic-gate /* 1950Sstevel@tonic-gate * See the comments in ho_byname() explaining 1960Sstevel@tonic-gate * the interpretation of TRY_AGAIN and ECONNREFUSED. 1970Sstevel@tonic-gate */ 1980Sstevel@tonic-gate if (pvt->res->res_h_errno != TRY_AGAIN || errno != ECONNREFUSED) 1990Sstevel@tonic-gate break; 2000Sstevel@tonic-gate } 2010Sstevel@tonic-gate if (softerror != 0 && pvt->res->res_h_errno == HOST_NOT_FOUND) 2020Sstevel@tonic-gate RES_SET_H_ERRNO(pvt->res, therrno); 2030Sstevel@tonic-gate return (NULL); 2040Sstevel@tonic-gate } 2050Sstevel@tonic-gate 2060Sstevel@tonic-gate static struct hostent * 2070Sstevel@tonic-gate ho_byaddr(struct irs_ho *this, const void *addr, int len, int af) { 2080Sstevel@tonic-gate struct pvt *pvt = (struct pvt *)this->private; 2090Sstevel@tonic-gate struct irs_rule *rule; 2100Sstevel@tonic-gate struct hostent *rval; 2110Sstevel@tonic-gate struct irs_ho *ho; 2120Sstevel@tonic-gate int therrno = NETDB_INTERNAL; 2130Sstevel@tonic-gate int softerror = 0; 2140Sstevel@tonic-gate 2150Sstevel@tonic-gate 2160Sstevel@tonic-gate if (init(this) == -1) 2170Sstevel@tonic-gate return (NULL); 2180Sstevel@tonic-gate 2190Sstevel@tonic-gate for (rule = pvt->rules; rule; rule = rule->next) { 2200Sstevel@tonic-gate ho = rule->inst->ho; 2210Sstevel@tonic-gate RES_SET_H_ERRNO(pvt->res, NETDB_INTERNAL); 2220Sstevel@tonic-gate errno = 0; 2230Sstevel@tonic-gate rval = (*ho->byaddr)(ho, addr, len, af); 2240Sstevel@tonic-gate if (rval != NULL) 2250Sstevel@tonic-gate return (rval); 2260Sstevel@tonic-gate if (softerror == 0 && 2270Sstevel@tonic-gate pvt->res->res_h_errno != HOST_NOT_FOUND && 2280Sstevel@tonic-gate pvt->res->res_h_errno != NETDB_INTERNAL) { 2290Sstevel@tonic-gate softerror = 1; 2300Sstevel@tonic-gate therrno = pvt->res->res_h_errno; 2310Sstevel@tonic-gate } 2320Sstevel@tonic-gate 2330Sstevel@tonic-gate if (rule->flags & IRS_CONTINUE) 2340Sstevel@tonic-gate continue; 2350Sstevel@tonic-gate /* 2360Sstevel@tonic-gate * See the comments in ho_byname() explaining 2370Sstevel@tonic-gate * the interpretation of TRY_AGAIN and ECONNREFUSED. 2380Sstevel@tonic-gate */ 2390Sstevel@tonic-gate if (pvt->res->res_h_errno != TRY_AGAIN || errno != ECONNREFUSED) 2400Sstevel@tonic-gate break; 2410Sstevel@tonic-gate } 2420Sstevel@tonic-gate if (softerror != 0 && pvt->res->res_h_errno == HOST_NOT_FOUND) 2430Sstevel@tonic-gate RES_SET_H_ERRNO(pvt->res, therrno); 2440Sstevel@tonic-gate return (NULL); 2450Sstevel@tonic-gate } 2460Sstevel@tonic-gate 2470Sstevel@tonic-gate static struct hostent * 2480Sstevel@tonic-gate ho_next(struct irs_ho *this) { 2490Sstevel@tonic-gate struct pvt *pvt = (struct pvt *)this->private; 2500Sstevel@tonic-gate struct hostent *rval; 2510Sstevel@tonic-gate struct irs_ho *ho; 2520Sstevel@tonic-gate 2530Sstevel@tonic-gate while (pvt->rule) { 2540Sstevel@tonic-gate ho = pvt->rule->inst->ho; 2550Sstevel@tonic-gate rval = (*ho->next)(ho); 2560Sstevel@tonic-gate if (rval) 2570Sstevel@tonic-gate return (rval); 2580Sstevel@tonic-gate if (!(pvt->rule->flags & IRS_CONTINUE)) 2590Sstevel@tonic-gate break; 2600Sstevel@tonic-gate pvt->rule = pvt->rule->next; 2610Sstevel@tonic-gate if (pvt->rule) { 2620Sstevel@tonic-gate ho = pvt->rule->inst->ho; 2630Sstevel@tonic-gate (*ho->rewind)(ho); 2640Sstevel@tonic-gate } 2650Sstevel@tonic-gate } 2660Sstevel@tonic-gate return (NULL); 2670Sstevel@tonic-gate } 2680Sstevel@tonic-gate 2690Sstevel@tonic-gate static void 2700Sstevel@tonic-gate ho_rewind(struct irs_ho *this) { 2710Sstevel@tonic-gate struct pvt *pvt = (struct pvt *)this->private; 2720Sstevel@tonic-gate struct irs_ho *ho; 2730Sstevel@tonic-gate 2740Sstevel@tonic-gate pvt->rule = pvt->rules; 2750Sstevel@tonic-gate if (pvt->rule) { 2760Sstevel@tonic-gate ho = pvt->rule->inst->ho; 2770Sstevel@tonic-gate (*ho->rewind)(ho); 2780Sstevel@tonic-gate } 2790Sstevel@tonic-gate } 2800Sstevel@tonic-gate 2810Sstevel@tonic-gate static void 2820Sstevel@tonic-gate ho_minimize(struct irs_ho *this) { 2830Sstevel@tonic-gate struct pvt *pvt = (struct pvt *)this->private; 2840Sstevel@tonic-gate struct irs_rule *rule; 2850Sstevel@tonic-gate 2860Sstevel@tonic-gate if (pvt->res) 2870Sstevel@tonic-gate res_nclose(pvt->res); 2880Sstevel@tonic-gate for (rule = pvt->rules; rule != NULL; rule = rule->next) { 2890Sstevel@tonic-gate struct irs_ho *ho = rule->inst->ho; 2900Sstevel@tonic-gate 2910Sstevel@tonic-gate (*ho->minimize)(ho); 2920Sstevel@tonic-gate } 2930Sstevel@tonic-gate } 2940Sstevel@tonic-gate 2950Sstevel@tonic-gate static struct __res_state * 2960Sstevel@tonic-gate ho_res_get(struct irs_ho *this) { 2970Sstevel@tonic-gate struct pvt *pvt = (struct pvt *)this->private; 2980Sstevel@tonic-gate 2990Sstevel@tonic-gate if (!pvt->res) { 3000Sstevel@tonic-gate struct __res_state *res; 3010Sstevel@tonic-gate res = (struct __res_state *)malloc(sizeof *res); 3020Sstevel@tonic-gate if (!res) { 3030Sstevel@tonic-gate errno = ENOMEM; 3040Sstevel@tonic-gate return (NULL); 3050Sstevel@tonic-gate } 3060Sstevel@tonic-gate memset(res, 0, sizeof *res); 3070Sstevel@tonic-gate ho_res_set(this, res, free); 3080Sstevel@tonic-gate } 3090Sstevel@tonic-gate 3100Sstevel@tonic-gate return (pvt->res); 3110Sstevel@tonic-gate } 3120Sstevel@tonic-gate 3130Sstevel@tonic-gate static void 3140Sstevel@tonic-gate ho_res_set(struct irs_ho *this, struct __res_state *res, 3150Sstevel@tonic-gate void (*free_res)(void *)) { 3160Sstevel@tonic-gate struct pvt *pvt = (struct pvt *)this->private; 3170Sstevel@tonic-gate struct irs_rule *rule; 3180Sstevel@tonic-gate 3190Sstevel@tonic-gate if (pvt->res && pvt->free_res) { 3200Sstevel@tonic-gate res_nclose(pvt->res); 3210Sstevel@tonic-gate (*pvt->free_res)(pvt->res); 3220Sstevel@tonic-gate } 3230Sstevel@tonic-gate 3240Sstevel@tonic-gate pvt->res = res; 3250Sstevel@tonic-gate pvt->free_res = free_res; 3260Sstevel@tonic-gate 3270Sstevel@tonic-gate for (rule = pvt->rules; rule != NULL; rule = rule->next) { 3280Sstevel@tonic-gate struct irs_ho *ho = rule->inst->ho; 3290Sstevel@tonic-gate 3300Sstevel@tonic-gate (*ho->res_set)(ho, pvt->res, NULL); 3310Sstevel@tonic-gate } 3320Sstevel@tonic-gate } 3330Sstevel@tonic-gate 3340Sstevel@tonic-gate static struct addrinfo * 3350Sstevel@tonic-gate ho_addrinfo(struct irs_ho *this, const char *name, const struct addrinfo *pai) 3360Sstevel@tonic-gate { 3370Sstevel@tonic-gate struct pvt *pvt = (struct pvt *)this->private; 3380Sstevel@tonic-gate struct irs_rule *rule; 3390Sstevel@tonic-gate struct addrinfo *rval = NULL; 3400Sstevel@tonic-gate struct irs_ho *ho; 3410Sstevel@tonic-gate int therrno = NETDB_INTERNAL; 3420Sstevel@tonic-gate int softerror = 0; 3430Sstevel@tonic-gate 3440Sstevel@tonic-gate if (init(this) == -1) 3450Sstevel@tonic-gate return (NULL); 3460Sstevel@tonic-gate 3470Sstevel@tonic-gate for (rule = pvt->rules; rule; rule = rule->next) { 3480Sstevel@tonic-gate ho = rule->inst->ho; 3490Sstevel@tonic-gate RES_SET_H_ERRNO(pvt->res, NETDB_INTERNAL); 3500Sstevel@tonic-gate errno = 0; 351*11038SRao.Shoaib@Sun.COM if (ho->addrinfo == NULL) /*%< for safety */ 3520Sstevel@tonic-gate continue; 3530Sstevel@tonic-gate rval = (*ho->addrinfo)(ho, name, pai); 3540Sstevel@tonic-gate if (rval != NULL) 3550Sstevel@tonic-gate return (rval); 3560Sstevel@tonic-gate if (softerror == 0 && 3570Sstevel@tonic-gate pvt->res->res_h_errno != HOST_NOT_FOUND && 3580Sstevel@tonic-gate pvt->res->res_h_errno != NETDB_INTERNAL) { 3590Sstevel@tonic-gate softerror = 1; 3600Sstevel@tonic-gate therrno = pvt->res->res_h_errno; 3610Sstevel@tonic-gate } 3620Sstevel@tonic-gate if (rule->flags & IRS_CONTINUE) 3630Sstevel@tonic-gate continue; 3640Sstevel@tonic-gate /* 3650Sstevel@tonic-gate * See the comments in ho_byname() explaining 3660Sstevel@tonic-gate * the interpretation of TRY_AGAIN and ECONNREFUSED. 3670Sstevel@tonic-gate */ 3680Sstevel@tonic-gate if (pvt->res->res_h_errno != TRY_AGAIN || 3690Sstevel@tonic-gate errno != ECONNREFUSED) 3700Sstevel@tonic-gate break; 3710Sstevel@tonic-gate } 3720Sstevel@tonic-gate if (softerror != 0 && pvt->res->res_h_errno == HOST_NOT_FOUND) 3730Sstevel@tonic-gate RES_SET_H_ERRNO(pvt->res, therrno); 3740Sstevel@tonic-gate return (NULL); 3750Sstevel@tonic-gate } 3760Sstevel@tonic-gate 3770Sstevel@tonic-gate static int 3780Sstevel@tonic-gate init(struct irs_ho *this) { 3790Sstevel@tonic-gate struct pvt *pvt = (struct pvt *)this->private; 3800Sstevel@tonic-gate 3810Sstevel@tonic-gate if (!pvt->res && !ho_res_get(this)) 3820Sstevel@tonic-gate return (-1); 3830Sstevel@tonic-gate 384*11038SRao.Shoaib@Sun.COM if (((pvt->res->options & RES_INIT) == 0U) && 3850Sstevel@tonic-gate (res_ninit(pvt->res) == -1)) 3860Sstevel@tonic-gate return (-1); 3870Sstevel@tonic-gate 3880Sstevel@tonic-gate return (0); 3890Sstevel@tonic-gate } 390*11038SRao.Shoaib@Sun.COM 391*11038SRao.Shoaib@Sun.COM /*! \file */ 392