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 #include <netinet/in.h>
247c478bd9Sstevel@tonic-gate #include <arpa/nameser.h>
257c478bd9Sstevel@tonic-gate #include <resolv.h>
267c478bd9Sstevel@tonic-gate
277c478bd9Sstevel@tonic-gate #include <stdio.h>
287c478bd9Sstevel@tonic-gate #include <string.h>
297c478bd9Sstevel@tonic-gate #include <netdb.h>
307c478bd9Sstevel@tonic-gate #include <ctype.h>
317c478bd9Sstevel@tonic-gate #include <stdlib.h>
327c478bd9Sstevel@tonic-gate #include <errno.h>
337c478bd9Sstevel@tonic-gate
347c478bd9Sstevel@tonic-gate #include <isc/memcluster.h>
357c478bd9Sstevel@tonic-gate #include <irs.h>
367c478bd9Sstevel@tonic-gate
377c478bd9Sstevel@tonic-gate #include "port_after.h"
387c478bd9Sstevel@tonic-gate
397c478bd9Sstevel@tonic-gate #include "irs_p.h"
407c478bd9Sstevel@tonic-gate #include "hesiod.h"
417c478bd9Sstevel@tonic-gate #include "dns_p.h"
427c478bd9Sstevel@tonic-gate
437c478bd9Sstevel@tonic-gate /* Types. */
447c478bd9Sstevel@tonic-gate
457c478bd9Sstevel@tonic-gate struct pvt {
467c478bd9Sstevel@tonic-gate struct dns_p * dns;
477c478bd9Sstevel@tonic-gate struct protoent proto;
487c478bd9Sstevel@tonic-gate char * prbuf;
497c478bd9Sstevel@tonic-gate };
507c478bd9Sstevel@tonic-gate
517c478bd9Sstevel@tonic-gate /* Forward. */
527c478bd9Sstevel@tonic-gate
537c478bd9Sstevel@tonic-gate static void pr_close(struct irs_pr *);
547c478bd9Sstevel@tonic-gate static struct protoent * pr_byname(struct irs_pr *, const char *);
557c478bd9Sstevel@tonic-gate static struct protoent * pr_bynumber(struct irs_pr *, int);
567c478bd9Sstevel@tonic-gate static struct protoent * pr_next(struct irs_pr *);
577c478bd9Sstevel@tonic-gate static void pr_rewind(struct irs_pr *);
587c478bd9Sstevel@tonic-gate static void pr_minimize(struct irs_pr *);
597c478bd9Sstevel@tonic-gate static struct __res_state * pr_res_get(struct irs_pr *);
607c478bd9Sstevel@tonic-gate static void pr_res_set(struct irs_pr *,
617c478bd9Sstevel@tonic-gate struct __res_state *,
627c478bd9Sstevel@tonic-gate void (*)(void *));
637c478bd9Sstevel@tonic-gate
647c478bd9Sstevel@tonic-gate static struct protoent * parse_hes_list(struct irs_pr *, char **);
657c478bd9Sstevel@tonic-gate
667c478bd9Sstevel@tonic-gate /* Public. */
677c478bd9Sstevel@tonic-gate
687c478bd9Sstevel@tonic-gate struct irs_pr *
irs_dns_pr(struct irs_acc * this)697c478bd9Sstevel@tonic-gate irs_dns_pr(struct irs_acc *this) {
707c478bd9Sstevel@tonic-gate struct dns_p *dns = (struct dns_p *)this->private;
717c478bd9Sstevel@tonic-gate struct pvt *pvt;
727c478bd9Sstevel@tonic-gate struct irs_pr *pr;
737c478bd9Sstevel@tonic-gate
747c478bd9Sstevel@tonic-gate if (!dns->hes_ctx) {
757c478bd9Sstevel@tonic-gate errno = ENODEV;
767c478bd9Sstevel@tonic-gate return (NULL);
777c478bd9Sstevel@tonic-gate }
787c478bd9Sstevel@tonic-gate if (!(pvt = memget(sizeof *pvt))) {
797c478bd9Sstevel@tonic-gate errno = ENOMEM;
807c478bd9Sstevel@tonic-gate return (NULL);
817c478bd9Sstevel@tonic-gate }
827c478bd9Sstevel@tonic-gate memset(pvt, 0, sizeof *pvt);
837c478bd9Sstevel@tonic-gate if (!(pr = memget(sizeof *pr))) {
847c478bd9Sstevel@tonic-gate memput(pvt, sizeof *pvt);
857c478bd9Sstevel@tonic-gate errno = ENOMEM;
867c478bd9Sstevel@tonic-gate return (NULL);
877c478bd9Sstevel@tonic-gate }
887c478bd9Sstevel@tonic-gate memset(pr, 0x5e, sizeof *pr);
897c478bd9Sstevel@tonic-gate pvt->dns = dns;
907c478bd9Sstevel@tonic-gate pr->private = pvt;
917c478bd9Sstevel@tonic-gate pr->byname = pr_byname;
927c478bd9Sstevel@tonic-gate pr->bynumber = pr_bynumber;
937c478bd9Sstevel@tonic-gate pr->next = pr_next;
947c478bd9Sstevel@tonic-gate pr->rewind = pr_rewind;
957c478bd9Sstevel@tonic-gate pr->close = pr_close;
967c478bd9Sstevel@tonic-gate pr->minimize = pr_minimize;
977c478bd9Sstevel@tonic-gate pr->res_get = pr_res_get;
987c478bd9Sstevel@tonic-gate pr->res_set = pr_res_set;
997c478bd9Sstevel@tonic-gate return (pr);
1007c478bd9Sstevel@tonic-gate }
1017c478bd9Sstevel@tonic-gate
1027c478bd9Sstevel@tonic-gate /* Methods. */
1037c478bd9Sstevel@tonic-gate
1047c478bd9Sstevel@tonic-gate static void
pr_close(struct irs_pr * this)1057c478bd9Sstevel@tonic-gate pr_close(struct irs_pr *this) {
1067c478bd9Sstevel@tonic-gate struct pvt *pvt = (struct pvt *)this->private;
1077c478bd9Sstevel@tonic-gate
1087c478bd9Sstevel@tonic-gate if (pvt->proto.p_aliases)
1097c478bd9Sstevel@tonic-gate free(pvt->proto.p_aliases);
1107c478bd9Sstevel@tonic-gate if (pvt->prbuf)
1117c478bd9Sstevel@tonic-gate free(pvt->prbuf);
1127c478bd9Sstevel@tonic-gate
1137c478bd9Sstevel@tonic-gate memput(pvt, sizeof *pvt);
1147c478bd9Sstevel@tonic-gate memput(this, sizeof *this);
1157c478bd9Sstevel@tonic-gate }
1167c478bd9Sstevel@tonic-gate
1177c478bd9Sstevel@tonic-gate static struct protoent *
pr_byname(struct irs_pr * this,const char * name)1187c478bd9Sstevel@tonic-gate pr_byname(struct irs_pr *this, const char *name) {
1197c478bd9Sstevel@tonic-gate struct pvt *pvt = (struct pvt *)this->private;
1207c478bd9Sstevel@tonic-gate struct dns_p *dns = pvt->dns;
1217c478bd9Sstevel@tonic-gate struct protoent *proto;
1227c478bd9Sstevel@tonic-gate char **hes_list;
1237c478bd9Sstevel@tonic-gate
1247c478bd9Sstevel@tonic-gate if (!(hes_list = hesiod_resolve(dns->hes_ctx, name, "protocol")))
1257c478bd9Sstevel@tonic-gate return (NULL);
1267c478bd9Sstevel@tonic-gate
1277c478bd9Sstevel@tonic-gate proto = parse_hes_list(this, hes_list);
1287c478bd9Sstevel@tonic-gate hesiod_free_list(dns->hes_ctx, hes_list);
1297c478bd9Sstevel@tonic-gate return (proto);
1307c478bd9Sstevel@tonic-gate }
1317c478bd9Sstevel@tonic-gate
1327c478bd9Sstevel@tonic-gate static struct protoent *
pr_bynumber(struct irs_pr * this,int num)1337c478bd9Sstevel@tonic-gate pr_bynumber(struct irs_pr *this, int num) {
1347c478bd9Sstevel@tonic-gate struct pvt *pvt = (struct pvt *)this->private;
1357c478bd9Sstevel@tonic-gate struct dns_p *dns = pvt->dns;
1367c478bd9Sstevel@tonic-gate struct protoent *proto;
1377c478bd9Sstevel@tonic-gate char numstr[16];
1387c478bd9Sstevel@tonic-gate char **hes_list;
1397c478bd9Sstevel@tonic-gate
1407c478bd9Sstevel@tonic-gate sprintf(numstr, "%d", num);
1417c478bd9Sstevel@tonic-gate if (!(hes_list = hesiod_resolve(dns->hes_ctx, numstr, "protonum")))
1427c478bd9Sstevel@tonic-gate return (NULL);
1437c478bd9Sstevel@tonic-gate
1447c478bd9Sstevel@tonic-gate proto = parse_hes_list(this, hes_list);
1457c478bd9Sstevel@tonic-gate hesiod_free_list(dns->hes_ctx, hes_list);
1467c478bd9Sstevel@tonic-gate return (proto);
1477c478bd9Sstevel@tonic-gate }
1487c478bd9Sstevel@tonic-gate
1497c478bd9Sstevel@tonic-gate static struct protoent *
pr_next(struct irs_pr * this)1507c478bd9Sstevel@tonic-gate pr_next(struct irs_pr *this) {
1517c478bd9Sstevel@tonic-gate UNUSED(this);
1527c478bd9Sstevel@tonic-gate errno = ENODEV;
1537c478bd9Sstevel@tonic-gate return (NULL);
1547c478bd9Sstevel@tonic-gate }
1557c478bd9Sstevel@tonic-gate
1567c478bd9Sstevel@tonic-gate static void
pr_rewind(struct irs_pr * this)1577c478bd9Sstevel@tonic-gate pr_rewind(struct irs_pr *this) {
1587c478bd9Sstevel@tonic-gate UNUSED(this);
1597c478bd9Sstevel@tonic-gate /* NOOP */
1607c478bd9Sstevel@tonic-gate }
1617c478bd9Sstevel@tonic-gate
1627c478bd9Sstevel@tonic-gate static void
pr_minimize(struct irs_pr * this)1637c478bd9Sstevel@tonic-gate pr_minimize(struct irs_pr *this) {
1647c478bd9Sstevel@tonic-gate UNUSED(this);
1657c478bd9Sstevel@tonic-gate /* NOOP */
1667c478bd9Sstevel@tonic-gate }
1677c478bd9Sstevel@tonic-gate
1687c478bd9Sstevel@tonic-gate static struct __res_state *
pr_res_get(struct irs_pr * this)1697c478bd9Sstevel@tonic-gate pr_res_get(struct irs_pr *this) {
1707c478bd9Sstevel@tonic-gate struct pvt *pvt = (struct pvt *)this->private;
1717c478bd9Sstevel@tonic-gate struct dns_p *dns = pvt->dns;
1727c478bd9Sstevel@tonic-gate
1737c478bd9Sstevel@tonic-gate return (__hesiod_res_get(dns->hes_ctx));
1747c478bd9Sstevel@tonic-gate }
1757c478bd9Sstevel@tonic-gate
1767c478bd9Sstevel@tonic-gate static void
pr_res_set(struct irs_pr * this,struct __res_state * res,void (* free_res)(void *))1777c478bd9Sstevel@tonic-gate pr_res_set(struct irs_pr *this, struct __res_state * res,
1787c478bd9Sstevel@tonic-gate void (*free_res)(void *)) {
1797c478bd9Sstevel@tonic-gate struct pvt *pvt = (struct pvt *)this->private;
1807c478bd9Sstevel@tonic-gate struct dns_p *dns = pvt->dns;
1817c478bd9Sstevel@tonic-gate
1827c478bd9Sstevel@tonic-gate __hesiod_res_set(dns->hes_ctx, res, free_res);
1837c478bd9Sstevel@tonic-gate }
1847c478bd9Sstevel@tonic-gate
1857c478bd9Sstevel@tonic-gate /* Private. */
1867c478bd9Sstevel@tonic-gate
1877c478bd9Sstevel@tonic-gate static struct protoent *
parse_hes_list(struct irs_pr * this,char ** hes_list)1887c478bd9Sstevel@tonic-gate parse_hes_list(struct irs_pr *this, char **hes_list) {
1897c478bd9Sstevel@tonic-gate struct pvt *pvt = (struct pvt *)this->private;
1907c478bd9Sstevel@tonic-gate char *p, *cp, **cpp, **new;
1917c478bd9Sstevel@tonic-gate int num = 0;
1927c478bd9Sstevel@tonic-gate int max = 0;
1937c478bd9Sstevel@tonic-gate
1947c478bd9Sstevel@tonic-gate for (cpp = hes_list; *cpp; cpp++) {
1957c478bd9Sstevel@tonic-gate cp = *cpp;
1967c478bd9Sstevel@tonic-gate
1977c478bd9Sstevel@tonic-gate /* Strip away comments, if any. */
1987c478bd9Sstevel@tonic-gate if ((p = strchr(cp, '#')))
1997c478bd9Sstevel@tonic-gate *p = 0;
2007c478bd9Sstevel@tonic-gate
2017c478bd9Sstevel@tonic-gate /* Skip blank lines. */
2027c478bd9Sstevel@tonic-gate p = cp;
2037c478bd9Sstevel@tonic-gate while (*p && !isspace((unsigned char)*p))
2047c478bd9Sstevel@tonic-gate p++;
2057c478bd9Sstevel@tonic-gate if (!*p)
2067c478bd9Sstevel@tonic-gate continue;
2077c478bd9Sstevel@tonic-gate
2087c478bd9Sstevel@tonic-gate /* OK, we've got a live one. Let's parse it for real. */
2097c478bd9Sstevel@tonic-gate if (pvt->prbuf)
2107c478bd9Sstevel@tonic-gate free(pvt->prbuf);
2117c478bd9Sstevel@tonic-gate pvt->prbuf = strdup(cp);
2127c478bd9Sstevel@tonic-gate
2137c478bd9Sstevel@tonic-gate p = pvt->prbuf;
2147c478bd9Sstevel@tonic-gate pvt->proto.p_name = p;
2157c478bd9Sstevel@tonic-gate while (*p && !isspace((unsigned char)*p))
2167c478bd9Sstevel@tonic-gate p++;
2177c478bd9Sstevel@tonic-gate if (!*p)
2187c478bd9Sstevel@tonic-gate continue;
2197c478bd9Sstevel@tonic-gate *p++ = '\0';
2207c478bd9Sstevel@tonic-gate
2217c478bd9Sstevel@tonic-gate pvt->proto.p_proto = atoi(p);
2227c478bd9Sstevel@tonic-gate while (*p && !isspace((unsigned char)*p))
2237c478bd9Sstevel@tonic-gate p++;
2247c478bd9Sstevel@tonic-gate if (*p)
2257c478bd9Sstevel@tonic-gate *p++ = '\0';
2267c478bd9Sstevel@tonic-gate
2277c478bd9Sstevel@tonic-gate while (*p) {
2287c478bd9Sstevel@tonic-gate if ((num + 1) >= max || !pvt->proto.p_aliases) {
2297c478bd9Sstevel@tonic-gate max += 10;
2307c478bd9Sstevel@tonic-gate new = realloc(pvt->proto.p_aliases,
2317c478bd9Sstevel@tonic-gate max * sizeof(char *));
2327c478bd9Sstevel@tonic-gate if (!new) {
2337c478bd9Sstevel@tonic-gate errno = ENOMEM;
2347c478bd9Sstevel@tonic-gate goto cleanup;
2357c478bd9Sstevel@tonic-gate }
2367c478bd9Sstevel@tonic-gate pvt->proto.p_aliases = new;
2377c478bd9Sstevel@tonic-gate }
2387c478bd9Sstevel@tonic-gate pvt->proto.p_aliases[num++] = p;
2397c478bd9Sstevel@tonic-gate while (*p && !isspace((unsigned char)*p))
2407c478bd9Sstevel@tonic-gate p++;
2417c478bd9Sstevel@tonic-gate if (*p)
2427c478bd9Sstevel@tonic-gate *p++ = '\0';
2437c478bd9Sstevel@tonic-gate }
2447c478bd9Sstevel@tonic-gate if (!pvt->proto.p_aliases)
2457c478bd9Sstevel@tonic-gate pvt->proto.p_aliases = malloc(sizeof(char *));
2467c478bd9Sstevel@tonic-gate if (!pvt->proto.p_aliases)
2477c478bd9Sstevel@tonic-gate goto cleanup;
2487c478bd9Sstevel@tonic-gate pvt->proto.p_aliases[num] = NULL;
2497c478bd9Sstevel@tonic-gate return (&pvt->proto);
2507c478bd9Sstevel@tonic-gate }
2517c478bd9Sstevel@tonic-gate
2527c478bd9Sstevel@tonic-gate cleanup:
2537c478bd9Sstevel@tonic-gate if (pvt->proto.p_aliases) {
2547c478bd9Sstevel@tonic-gate free(pvt->proto.p_aliases);
2557c478bd9Sstevel@tonic-gate pvt->proto.p_aliases = NULL;
2567c478bd9Sstevel@tonic-gate }
2577c478bd9Sstevel@tonic-gate if (pvt->prbuf) {
2587c478bd9Sstevel@tonic-gate free(pvt->prbuf);
2597c478bd9Sstevel@tonic-gate pvt->prbuf = NULL;
2607c478bd9Sstevel@tonic-gate }
2617c478bd9Sstevel@tonic-gate return (NULL);
2627c478bd9Sstevel@tonic-gate }
263*9525b14bSRao Shoaib
264*9525b14bSRao Shoaib /*! \file */
265