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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_sv.c,v 1.2.18.1 2005/04/27 05:00:57 sra Exp $";
#endif
/* Imports */
#include "port_before.h"
#include <sys/types.h>
#include <netinet/in.h>
#include <arpa/nameser.h>
#include <resolv.h>
#include <errno.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 sv_close(struct irs_sv*);
static struct servent * sv_next(struct irs_sv *);
static struct servent * sv_byname(struct irs_sv *, const char *,
const char *);
static struct servent * sv_byport(struct irs_sv *, int, const char *);
static void sv_rewind(struct irs_sv *);
static void sv_minimize(struct irs_sv *);
static struct __res_state * sv_res_get(struct irs_sv *);
static void sv_res_set(struct irs_sv *,
struct __res_state *,
void (*)(void *));
/* Public */
struct irs_sv *
irs_gen_sv(struct irs_acc *this) {
struct gen_p *accpvt = (struct gen_p *)this->private;
struct irs_sv *sv;
struct pvt *pvt;
if (!(sv = memget(sizeof *sv))) {
errno = ENOMEM;
return (NULL);
}
memset(sv, 0x5e, sizeof *sv);
if (!(pvt = memget(sizeof *pvt))) {
memput(sv, sizeof *sv);
errno = ENOMEM;
return (NULL);
}
memset(pvt, 0, sizeof *pvt);
pvt->rules = accpvt->map_rules[irs_sv];
pvt->rule = pvt->rules;
sv->private = pvt;
sv->close = sv_close;
sv->next = sv_next;
sv->byname = sv_byname;
sv->byport = sv_byport;
sv->rewind = sv_rewind;
sv->minimize = sv_minimize;
sv->res_get = sv_res_get;
sv->res_set = sv_res_set;
return (sv);
}
/* Methods */
static void
sv_close(struct irs_sv *this) {
struct pvt *pvt = (struct pvt *)this->private;
memput(pvt, sizeof *pvt);
memput(this, sizeof *this);
}
static struct servent *
sv_next(struct irs_sv *this) {
struct pvt *pvt = (struct pvt *)this->private;
struct servent *rval;
struct irs_sv *sv;
while (pvt->rule) {
sv = pvt->rule->inst->sv;
rval = (*sv->next)(sv);
if (rval)
return (rval);
if (!(pvt->rule->flags & IRS_CONTINUE))
break;
pvt->rule = pvt->rule->next;
if (pvt->rule) {
sv = pvt->rule->inst->sv;
(*sv->rewind)(sv);
}
}
return (NULL);
}
static struct servent *
sv_byname(struct irs_sv *this, const char *name, const char *proto) {
struct pvt *pvt = (struct pvt *)this->private;
struct irs_rule *rule;
struct servent *rval;
struct irs_sv *sv;
rval = NULL;
for (rule = pvt->rules; rule; rule = rule->next) {
sv = rule->inst->sv;
rval = (*sv->byname)(sv, name, proto);
if (rval || !(rule->flags & IRS_CONTINUE))
break;
}
return (rval);
}
static struct servent *
sv_byport(struct irs_sv *this, int port, const char *proto) {
struct pvt *pvt = (struct pvt *)this->private;
struct irs_rule *rule;
struct servent *rval;
struct irs_sv *sv;
rval = NULL;
for (rule = pvt->rules; rule; rule = rule->next) {
sv = rule->inst->sv;
rval = (*sv->byport)(sv, port, proto);
if (rval || !(rule->flags & IRS_CONTINUE))
break;
}
return (rval);
}
static void
sv_rewind(struct irs_sv *this) {
struct pvt *pvt = (struct pvt *)this->private;
struct irs_sv *sv;
pvt->rule = pvt->rules;
if (pvt->rule) {
sv = pvt->rule->inst->sv;
(*sv->rewind)(sv);
}
}
static void
sv_minimize(struct irs_sv *this) {
struct pvt *pvt = (struct pvt *)this->private;
struct irs_rule *rule;
for (rule = pvt->rules; rule != NULL; rule = rule->next) {
struct irs_sv *sv = rule->inst->sv;
(*sv->minimize)(sv);
}
}
static struct __res_state *
sv_res_get(struct irs_sv *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);
sv_res_set(this, res, free);
}
return (pvt->res);
}
static void
sv_res_set(struct irs_sv *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_sv *sv = rule->inst->sv;
if (sv->res_set)
(*sv->res_set)(sv, pvt->res, NULL);
}
}
/*! \file */
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