17c478bd9Sstevel@tonic-gate /*
2*9525b14bSRao Shoaib * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
37c478bd9Sstevel@tonic-gate * Copyright (c) 1996,1999 by Internet Software Consortium.
47c478bd9Sstevel@tonic-gate *
57c478bd9Sstevel@tonic-gate * Permission to use, copy, modify, and distribute this software for any
67c478bd9Sstevel@tonic-gate * purpose with or without fee is hereby granted, provided that the above
77c478bd9Sstevel@tonic-gate * copyright notice and this permission notice appear in all copies.
87c478bd9Sstevel@tonic-gate *
9*9525b14bSRao Shoaib * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
10*9525b14bSRao Shoaib * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11*9525b14bSRao Shoaib * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR
12*9525b14bSRao Shoaib * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13*9525b14bSRao Shoaib * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14*9525b14bSRao Shoaib * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
15*9525b14bSRao Shoaib * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
167c478bd9Sstevel@tonic-gate */
177c478bd9Sstevel@tonic-gate
187c478bd9Sstevel@tonic-gate /* Imports */
197c478bd9Sstevel@tonic-gate
207c478bd9Sstevel@tonic-gate #include "port_before.h"
217c478bd9Sstevel@tonic-gate
227c478bd9Sstevel@tonic-gate #include <sys/types.h>
237c478bd9Sstevel@tonic-gate
247c478bd9Sstevel@tonic-gate #include <netinet/in.h>
257c478bd9Sstevel@tonic-gate #include <arpa/nameser.h>
267c478bd9Sstevel@tonic-gate
277c478bd9Sstevel@tonic-gate #include <errno.h>
287c478bd9Sstevel@tonic-gate #include <resolv.h>
297c478bd9Sstevel@tonic-gate #include <stdlib.h>
307c478bd9Sstevel@tonic-gate #include <string.h>
317c478bd9Sstevel@tonic-gate
327c478bd9Sstevel@tonic-gate #include <isc/memcluster.h>
337c478bd9Sstevel@tonic-gate #include <irs.h>
347c478bd9Sstevel@tonic-gate
357c478bd9Sstevel@tonic-gate #include "port_after.h"
367c478bd9Sstevel@tonic-gate
377c478bd9Sstevel@tonic-gate #include "irs_p.h"
387c478bd9Sstevel@tonic-gate #include "gen_p.h"
397c478bd9Sstevel@tonic-gate
407c478bd9Sstevel@tonic-gate /* Types */
417c478bd9Sstevel@tonic-gate
427c478bd9Sstevel@tonic-gate struct pvt {
437c478bd9Sstevel@tonic-gate struct irs_rule * rules;
447c478bd9Sstevel@tonic-gate struct irs_rule * rule;
457c478bd9Sstevel@tonic-gate struct __res_state * res;
467c478bd9Sstevel@tonic-gate void (*free_res)(void *);
477c478bd9Sstevel@tonic-gate };
487c478bd9Sstevel@tonic-gate
497c478bd9Sstevel@tonic-gate /* Forward */
507c478bd9Sstevel@tonic-gate
517c478bd9Sstevel@tonic-gate static void nw_close(struct irs_nw*);
527c478bd9Sstevel@tonic-gate static struct nwent * nw_next(struct irs_nw *);
537c478bd9Sstevel@tonic-gate static struct nwent * nw_byname(struct irs_nw *, const char *, int);
547c478bd9Sstevel@tonic-gate static struct nwent * nw_byaddr(struct irs_nw *, void *, int, int);
557c478bd9Sstevel@tonic-gate static void nw_rewind(struct irs_nw *);
567c478bd9Sstevel@tonic-gate static void nw_minimize(struct irs_nw *);
577c478bd9Sstevel@tonic-gate static struct __res_state * nw_res_get(struct irs_nw *this);
587c478bd9Sstevel@tonic-gate static void nw_res_set(struct irs_nw *this,
597c478bd9Sstevel@tonic-gate struct __res_state *res,
607c478bd9Sstevel@tonic-gate void (*free_res)(void *));
617c478bd9Sstevel@tonic-gate
627c478bd9Sstevel@tonic-gate static int init(struct irs_nw *this);
637c478bd9Sstevel@tonic-gate
647c478bd9Sstevel@tonic-gate /* Public */
657c478bd9Sstevel@tonic-gate
667c478bd9Sstevel@tonic-gate struct irs_nw *
irs_gen_nw(struct irs_acc * this)677c478bd9Sstevel@tonic-gate irs_gen_nw(struct irs_acc *this) {
687c478bd9Sstevel@tonic-gate struct gen_p *accpvt = (struct gen_p *)this->private;
697c478bd9Sstevel@tonic-gate struct irs_nw *nw;
707c478bd9Sstevel@tonic-gate struct pvt *pvt;
717c478bd9Sstevel@tonic-gate
727c478bd9Sstevel@tonic-gate if (!(pvt = memget(sizeof *pvt))) {
737c478bd9Sstevel@tonic-gate errno = ENOMEM;
747c478bd9Sstevel@tonic-gate return (NULL);
757c478bd9Sstevel@tonic-gate }
767c478bd9Sstevel@tonic-gate memset(pvt, 0, sizeof *pvt);
777c478bd9Sstevel@tonic-gate if (!(nw = memget(sizeof *nw))) {
787c478bd9Sstevel@tonic-gate memput(pvt, sizeof *pvt);
797c478bd9Sstevel@tonic-gate errno = ENOMEM;
807c478bd9Sstevel@tonic-gate return (NULL);
817c478bd9Sstevel@tonic-gate }
827c478bd9Sstevel@tonic-gate memset(nw, 0x5e, sizeof *nw);
837c478bd9Sstevel@tonic-gate pvt->rules = accpvt->map_rules[irs_nw];
847c478bd9Sstevel@tonic-gate pvt->rule = pvt->rules;
857c478bd9Sstevel@tonic-gate nw->private = pvt;
867c478bd9Sstevel@tonic-gate nw->close = nw_close;
877c478bd9Sstevel@tonic-gate nw->next = nw_next;
887c478bd9Sstevel@tonic-gate nw->byname = nw_byname;
897c478bd9Sstevel@tonic-gate nw->byaddr = nw_byaddr;
907c478bd9Sstevel@tonic-gate nw->rewind = nw_rewind;
917c478bd9Sstevel@tonic-gate nw->minimize = nw_minimize;
927c478bd9Sstevel@tonic-gate nw->res_get = nw_res_get;
937c478bd9Sstevel@tonic-gate nw->res_set = nw_res_set;
947c478bd9Sstevel@tonic-gate return (nw);
957c478bd9Sstevel@tonic-gate }
967c478bd9Sstevel@tonic-gate
977c478bd9Sstevel@tonic-gate /* Methods */
987c478bd9Sstevel@tonic-gate
997c478bd9Sstevel@tonic-gate static void
nw_close(struct irs_nw * this)1007c478bd9Sstevel@tonic-gate nw_close(struct irs_nw *this) {
1017c478bd9Sstevel@tonic-gate struct pvt *pvt = (struct pvt *)this->private;
1027c478bd9Sstevel@tonic-gate
1037c478bd9Sstevel@tonic-gate nw_minimize(this);
1047c478bd9Sstevel@tonic-gate
1057c478bd9Sstevel@tonic-gate if (pvt->res && pvt->free_res)
1067c478bd9Sstevel@tonic-gate (*pvt->free_res)(pvt->res);
1077c478bd9Sstevel@tonic-gate
1087c478bd9Sstevel@tonic-gate memput(pvt, sizeof *pvt);
1097c478bd9Sstevel@tonic-gate memput(this, sizeof *this);
1107c478bd9Sstevel@tonic-gate }
1117c478bd9Sstevel@tonic-gate
1127c478bd9Sstevel@tonic-gate static struct nwent *
nw_next(struct irs_nw * this)1137c478bd9Sstevel@tonic-gate nw_next(struct irs_nw *this) {
1147c478bd9Sstevel@tonic-gate struct pvt *pvt = (struct pvt *)this->private;
1157c478bd9Sstevel@tonic-gate struct nwent *rval;
1167c478bd9Sstevel@tonic-gate struct irs_nw *nw;
1177c478bd9Sstevel@tonic-gate
1187c478bd9Sstevel@tonic-gate if (init(this) == -1)
1197c478bd9Sstevel@tonic-gate return(NULL);
1207c478bd9Sstevel@tonic-gate
1217c478bd9Sstevel@tonic-gate while (pvt->rule) {
1227c478bd9Sstevel@tonic-gate nw = pvt->rule->inst->nw;
1237c478bd9Sstevel@tonic-gate rval = (*nw->next)(nw);
1247c478bd9Sstevel@tonic-gate if (rval)
1257c478bd9Sstevel@tonic-gate return (rval);
1267c478bd9Sstevel@tonic-gate if (!(pvt->rules->flags & IRS_CONTINUE))
1277c478bd9Sstevel@tonic-gate break;
1287c478bd9Sstevel@tonic-gate pvt->rule = pvt->rule->next;
1297c478bd9Sstevel@tonic-gate if (pvt->rule) {
1307c478bd9Sstevel@tonic-gate nw = pvt->rule->inst->nw;
1317c478bd9Sstevel@tonic-gate (*nw->rewind)(nw);
1327c478bd9Sstevel@tonic-gate }
1337c478bd9Sstevel@tonic-gate }
1347c478bd9Sstevel@tonic-gate return (NULL);
1357c478bd9Sstevel@tonic-gate }
1367c478bd9Sstevel@tonic-gate
1377c478bd9Sstevel@tonic-gate static struct nwent *
nw_byname(struct irs_nw * this,const char * name,int type)1387c478bd9Sstevel@tonic-gate nw_byname(struct irs_nw *this, const char *name, int type) {
1397c478bd9Sstevel@tonic-gate struct pvt *pvt = (struct pvt *)this->private;
1407c478bd9Sstevel@tonic-gate struct irs_rule *rule;
1417c478bd9Sstevel@tonic-gate struct nwent *rval;
1427c478bd9Sstevel@tonic-gate struct irs_nw *nw;
1437c478bd9Sstevel@tonic-gate
1447c478bd9Sstevel@tonic-gate if (init(this) == -1)
1457c478bd9Sstevel@tonic-gate return(NULL);
1467c478bd9Sstevel@tonic-gate
1477c478bd9Sstevel@tonic-gate for (rule = pvt->rules; rule; rule = rule->next) {
1487c478bd9Sstevel@tonic-gate nw = rule->inst->nw;
1497c478bd9Sstevel@tonic-gate RES_SET_H_ERRNO(pvt->res, NETDB_INTERNAL);
1507c478bd9Sstevel@tonic-gate rval = (*nw->byname)(nw, name, type);
1517c478bd9Sstevel@tonic-gate if (rval != NULL)
1527c478bd9Sstevel@tonic-gate return (rval);
1537c478bd9Sstevel@tonic-gate if (pvt->res->res_h_errno != TRY_AGAIN &&
1547c478bd9Sstevel@tonic-gate !(rule->flags & IRS_CONTINUE))
1557c478bd9Sstevel@tonic-gate break;
1567c478bd9Sstevel@tonic-gate }
1577c478bd9Sstevel@tonic-gate return (NULL);
1587c478bd9Sstevel@tonic-gate }
1597c478bd9Sstevel@tonic-gate
1607c478bd9Sstevel@tonic-gate static struct nwent *
nw_byaddr(struct irs_nw * this,void * net,int length,int type)1617c478bd9Sstevel@tonic-gate nw_byaddr(struct irs_nw *this, void *net, int length, int type) {
1627c478bd9Sstevel@tonic-gate struct pvt *pvt = (struct pvt *)this->private;
1637c478bd9Sstevel@tonic-gate struct irs_rule *rule;
1647c478bd9Sstevel@tonic-gate struct nwent *rval;
1657c478bd9Sstevel@tonic-gate struct irs_nw *nw;
1667c478bd9Sstevel@tonic-gate
1677c478bd9Sstevel@tonic-gate if (init(this) == -1)
1687c478bd9Sstevel@tonic-gate return(NULL);
1697c478bd9Sstevel@tonic-gate
1707c478bd9Sstevel@tonic-gate for (rule = pvt->rules; rule; rule = rule->next) {
1717c478bd9Sstevel@tonic-gate nw = rule->inst->nw;
1727c478bd9Sstevel@tonic-gate RES_SET_H_ERRNO(pvt->res, NETDB_INTERNAL);
1737c478bd9Sstevel@tonic-gate rval = (*nw->byaddr)(nw, net, length, type);
1747c478bd9Sstevel@tonic-gate if (rval != NULL)
1757c478bd9Sstevel@tonic-gate return (rval);
1767c478bd9Sstevel@tonic-gate if (pvt->res->res_h_errno != TRY_AGAIN &&
1777c478bd9Sstevel@tonic-gate !(rule->flags & IRS_CONTINUE))
1787c478bd9Sstevel@tonic-gate break;
1797c478bd9Sstevel@tonic-gate }
1807c478bd9Sstevel@tonic-gate return (NULL);
1817c478bd9Sstevel@tonic-gate }
1827c478bd9Sstevel@tonic-gate
1837c478bd9Sstevel@tonic-gate static void
nw_rewind(struct irs_nw * this)1847c478bd9Sstevel@tonic-gate nw_rewind(struct irs_nw *this) {
1857c478bd9Sstevel@tonic-gate struct pvt *pvt = (struct pvt *)this->private;
1867c478bd9Sstevel@tonic-gate struct irs_nw *nw;
1877c478bd9Sstevel@tonic-gate
1887c478bd9Sstevel@tonic-gate pvt->rule = pvt->rules;
1897c478bd9Sstevel@tonic-gate if (pvt->rule) {
1907c478bd9Sstevel@tonic-gate nw = pvt->rule->inst->nw;
1917c478bd9Sstevel@tonic-gate (*nw->rewind)(nw);
1927c478bd9Sstevel@tonic-gate }
1937c478bd9Sstevel@tonic-gate }
1947c478bd9Sstevel@tonic-gate
1957c478bd9Sstevel@tonic-gate static void
nw_minimize(struct irs_nw * this)1967c478bd9Sstevel@tonic-gate nw_minimize(struct irs_nw *this) {
1977c478bd9Sstevel@tonic-gate struct pvt *pvt = (struct pvt *)this->private;
1987c478bd9Sstevel@tonic-gate struct irs_rule *rule;
1997c478bd9Sstevel@tonic-gate
2007c478bd9Sstevel@tonic-gate if (pvt->res)
2017c478bd9Sstevel@tonic-gate res_nclose(pvt->res);
2027c478bd9Sstevel@tonic-gate for (rule = pvt->rules; rule != NULL; rule = rule->next) {
2037c478bd9Sstevel@tonic-gate struct irs_nw *nw = rule->inst->nw;
2047c478bd9Sstevel@tonic-gate
2057c478bd9Sstevel@tonic-gate (*nw->minimize)(nw);
2067c478bd9Sstevel@tonic-gate }
2077c478bd9Sstevel@tonic-gate }
2087c478bd9Sstevel@tonic-gate
2097c478bd9Sstevel@tonic-gate static struct __res_state *
nw_res_get(struct irs_nw * this)2107c478bd9Sstevel@tonic-gate nw_res_get(struct irs_nw *this) {
2117c478bd9Sstevel@tonic-gate struct pvt *pvt = (struct pvt *)this->private;
2127c478bd9Sstevel@tonic-gate
2137c478bd9Sstevel@tonic-gate if (!pvt->res) {
2147c478bd9Sstevel@tonic-gate struct __res_state *res;
2157c478bd9Sstevel@tonic-gate res = (struct __res_state *)malloc(sizeof *res);
2167c478bd9Sstevel@tonic-gate if (!res) {
2177c478bd9Sstevel@tonic-gate errno = ENOMEM;
2187c478bd9Sstevel@tonic-gate return (NULL);
2197c478bd9Sstevel@tonic-gate }
2207c478bd9Sstevel@tonic-gate memset(res, 0, sizeof *res);
2217c478bd9Sstevel@tonic-gate nw_res_set(this, res, free);
2227c478bd9Sstevel@tonic-gate }
2237c478bd9Sstevel@tonic-gate
2247c478bd9Sstevel@tonic-gate return (pvt->res);
2257c478bd9Sstevel@tonic-gate }
2267c478bd9Sstevel@tonic-gate
2277c478bd9Sstevel@tonic-gate static void
nw_res_set(struct irs_nw * this,struct __res_state * res,void (* free_res)(void *))2287c478bd9Sstevel@tonic-gate nw_res_set(struct irs_nw *this, struct __res_state *res,
2297c478bd9Sstevel@tonic-gate void (*free_res)(void *)) {
2307c478bd9Sstevel@tonic-gate struct pvt *pvt = (struct pvt *)this->private;
2317c478bd9Sstevel@tonic-gate struct irs_rule *rule;
2327c478bd9Sstevel@tonic-gate
2337c478bd9Sstevel@tonic-gate if (pvt->res && pvt->free_res) {
2347c478bd9Sstevel@tonic-gate res_nclose(pvt->res);
2357c478bd9Sstevel@tonic-gate (*pvt->free_res)(pvt->res);
2367c478bd9Sstevel@tonic-gate }
2377c478bd9Sstevel@tonic-gate
2387c478bd9Sstevel@tonic-gate pvt->res = res;
2397c478bd9Sstevel@tonic-gate pvt->free_res = free_res;
2407c478bd9Sstevel@tonic-gate
2417c478bd9Sstevel@tonic-gate for (rule = pvt->rules; rule != NULL; rule = rule->next) {
2427c478bd9Sstevel@tonic-gate struct irs_nw *nw = rule->inst->nw;
2437c478bd9Sstevel@tonic-gate
2447c478bd9Sstevel@tonic-gate (*nw->res_set)(nw, pvt->res, NULL);
2457c478bd9Sstevel@tonic-gate }
2467c478bd9Sstevel@tonic-gate }
2477c478bd9Sstevel@tonic-gate
2487c478bd9Sstevel@tonic-gate static int
init(struct irs_nw * this)2497c478bd9Sstevel@tonic-gate init(struct irs_nw *this) {
2507c478bd9Sstevel@tonic-gate struct pvt *pvt = (struct pvt *)this->private;
2517c478bd9Sstevel@tonic-gate
2527c478bd9Sstevel@tonic-gate if (!pvt->res && !nw_res_get(this))
2537c478bd9Sstevel@tonic-gate return (-1);
254*9525b14bSRao Shoaib if (((pvt->res->options & RES_INIT) == 0U) &&
2557c478bd9Sstevel@tonic-gate res_ninit(pvt->res) == -1)
2567c478bd9Sstevel@tonic-gate return (-1);
2577c478bd9Sstevel@tonic-gate return (0);
2587c478bd9Sstevel@tonic-gate }
259*9525b14bSRao Shoaib
260*9525b14bSRao Shoaib /*! \file */
261