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/*
* Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
* Copyright (c) 1996,1999 by Internet Software Consortium.
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
* OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#if !defined(LINT) && !defined(CODECENTER)
static const char rcsid[] = "$Id: gen_pr.c,v 1.3 2005/04/27 04:56:24 sra Exp $";
#endif
/* Imports */
#include "port_before.h"
#include <sys/types.h>
#include <netinet/in.h>
#include <arpa/nameser.h>
#include <errno.h>
#include <resolv.h>
#include <stdlib.h>
#include <string.h>
#include <isc/memcluster.h>
#include <irs.h>
#include "port_after.h"
#include "irs_p.h"
#include "gen_p.h"
/* Types */
struct pvt {
struct irs_rule * rules;
struct irs_rule * rule;
struct __res_state * res;
void (*free_res)(void *);
};
/* Forward */
static void pr_close(struct irs_pr*);
static struct protoent * pr_next(struct irs_pr *);
static struct protoent * pr_byname(struct irs_pr *, const char *);
static struct protoent * pr_bynumber(struct irs_pr *, int);
static void pr_rewind(struct irs_pr *);
static void pr_minimize(struct irs_pr *);
static struct __res_state * pr_res_get(struct irs_pr *);
static void pr_res_set(struct irs_pr *,
struct __res_state *,
void (*)(void *));
/* Public */
struct irs_pr *
irs_gen_pr(struct irs_acc *this) {
struct gen_p *accpvt = (struct gen_p *)this->private;
struct irs_pr *pr;
struct pvt *pvt;
if (!(pr = memget(sizeof *pr))) {
errno = ENOMEM;
return (NULL);
}
memset(pr, 0x5e, sizeof *pr);
if (!(pvt = memget(sizeof *pvt))) {
memput(pr, sizeof *pr);
errno = ENOMEM;
return (NULL);
}
memset(pvt, 0, sizeof *pvt);
pvt->rules = accpvt->map_rules[irs_pr];
pvt->rule = pvt->rules;
pr->private = pvt;
pr->close = pr_close;
pr->next = pr_next;
pr->byname = pr_byname;
pr->bynumber = pr_bynumber;
pr->rewind = pr_rewind;
pr->minimize = pr_minimize;
pr->res_get = pr_res_get;
pr->res_set = pr_res_set;
return (pr);
}
/* Methods */
static void
pr_close(struct irs_pr *this) {
struct pvt *pvt = (struct pvt *)this->private;
memput(pvt, sizeof *pvt);
memput(this, sizeof *this);
}
static struct protoent *
pr_next(struct irs_pr *this) {
struct pvt *pvt = (struct pvt *)this->private;
struct protoent *rval;
struct irs_pr *pr;
while (pvt->rule) {
pr = pvt->rule->inst->pr;
rval = (*pr->next)(pr);
if (rval)
return (rval);
if (!(pvt->rules->flags & IRS_CONTINUE))
break;
pvt->rule = pvt->rule->next;
if (pvt->rule) {
pr = pvt->rule->inst->pr;
(*pr->rewind)(pr);
}
}
return (NULL);
}
static struct protoent *
pr_byname(struct irs_pr *this, const char *name) {
struct pvt *pvt = (struct pvt *)this->private;
struct irs_rule *rule;
struct protoent *rval;
struct irs_pr *pr;
rval = NULL;
for (rule = pvt->rules; rule; rule = rule->next) {
pr = rule->inst->pr;
rval = (*pr->byname)(pr, name);
if (rval || !(rule->flags & IRS_CONTINUE))
break;
}
return (rval);
}
static struct protoent *
pr_bynumber(struct irs_pr *this, int proto) {
struct pvt *pvt = (struct pvt *)this->private;
struct irs_rule *rule;
struct protoent *rval;
struct irs_pr *pr;
rval = NULL;
for (rule = pvt->rules; rule; rule = rule->next) {
pr = rule->inst->pr;
rval = (*pr->bynumber)(pr, proto);
if (rval || !(rule->flags & IRS_CONTINUE))
break;
}
return (rval);
}
static void
pr_rewind(struct irs_pr *this) {
struct pvt *pvt = (struct pvt *)this->private;
struct irs_pr *pr;
pvt->rule = pvt->rules;
if (pvt->rule) {
pr = pvt->rule->inst->pr;
(*pr->rewind)(pr);
}
}
static void
pr_minimize(struct irs_pr *this) {
struct pvt *pvt = (struct pvt *)this->private;
struct irs_rule *rule;
for (rule = pvt->rules; rule != NULL; rule = rule->next) {
struct irs_pr *pr = rule->inst->pr;
(*pr->minimize)(pr);
}
}
static struct __res_state *
pr_res_get(struct irs_pr *this) {
struct pvt *pvt = (struct pvt *)this->private;
if (!pvt->res) {
struct __res_state *res;
res = (struct __res_state *)malloc(sizeof *res);
if (!res) {
errno = ENOMEM;
return (NULL);
}
memset(res, 0, sizeof *res);
pr_res_set(this, res, free);
}
return (pvt->res);
}
static void
pr_res_set(struct irs_pr *this, struct __res_state *res,
void (*free_res)(void *)) {
struct pvt *pvt = (struct pvt *)this->private;
struct irs_rule *rule;
if (pvt->res && pvt->free_res) {
res_nclose(pvt->res);
(*pvt->free_res)(pvt->res);
}
pvt->res = res;
pvt->free_res = free_res;
for (rule = pvt->rules; rule != NULL; rule = rule->next) {
struct irs_pr *pr = rule->inst->pr;
if (pr->res_set)
(*pr->res_set)(pr, pvt->res, NULL);
}
}
/*! \file */
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