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/*
* Copyright (c) 1996 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 INTERNET SOFTWARE CONSORTIUM DISCLAIMS
* ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
* CONSORTIUM 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 char rcsid[] = "$Id: gen_nw.c,v 1.8 1997/12/04 04:57:50 halley Exp $";
#endif
/* Imports */
#include "port_before.h"
#include <sys/types.h>
#include <errno.h>
#include <stdlib.h>
#include <string.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;
};
/* Forward */
static void nw_close(struct irs_nw*);
static struct nwent * nw_next(struct irs_nw *);
static struct nwent * nw_byname(struct irs_nw *, const char *, int);
static struct nwent * nw_byaddr(struct irs_nw *, void *, int, int);
static void nw_rewind(struct irs_nw *);
static void nw_minimize(struct irs_nw *);
/* Public */
struct irs_nw *
irs_gen_nw(struct irs_acc *this) {
struct gen_p *accpvt = (struct gen_p *)this->private;
struct irs_nw *nw;
struct pvt *pvt;
if (!(nw = (struct irs_nw *)malloc(sizeof *nw))) {
errno = ENOMEM;
return (NULL);
}
memset(nw, 0x5e, sizeof *nw);
if (!(pvt = (struct pvt *)malloc(sizeof *pvt))) {
free(nw);
errno = ENOMEM;
return (NULL);
}
memset(pvt, 0, sizeof *pvt);
pvt->rules = accpvt->map_rules[irs_nw];
pvt->rule = pvt->rules;
nw->private = pvt;
nw->close = nw_close;
nw->next = nw_next;
nw->byname = nw_byname;
nw->byaddr = nw_byaddr;
nw->rewind = nw_rewind;
nw->minimize = nw_minimize;
return (nw);
}
/* Methods */
static void
nw_close(struct irs_nw *this) {
struct pvt *pvt = (struct pvt *)this->private;
free(pvt);
free(this);
}
static struct nwent *
nw_next(struct irs_nw *this) {
struct pvt *pvt = (struct pvt *)this->private;
struct nwent *rval;
struct irs_nw *nw;
while (pvt->rule) {
nw = pvt->rule->inst->nw;
rval = (*nw->next)(nw);
if (rval)
return (rval);
if (!(pvt->rules->flags & IRS_CONTINUE))
break;
pvt->rule = pvt->rule->next;
if (pvt->rule) {
nw = pvt->rule->inst->nw;
(*nw->rewind)(nw);
}
}
return (NULL);
}
static struct nwent *
nw_byname(struct irs_nw *this, const char *name, int type) {
struct pvt *pvt = (struct pvt *)this->private;
struct irs_rule *rule;
struct nwent *rval;
struct irs_nw *nw;
for (rule = pvt->rules; rule; rule = rule->next) {
nw = rule->inst->nw;
h_errno = NETDB_INTERNAL;
rval = (*nw->byname)(nw, name, type);
if (rval != NULL)
return (rval);
if (h_errno != TRY_AGAIN && !(rule->flags & IRS_CONTINUE))
break;
}
return (NULL);
}
static struct nwent *
nw_byaddr(struct irs_nw *this, void *net, int length, int type) {
struct pvt *pvt = (struct pvt *)this->private;
struct irs_rule *rule;
struct nwent *rval;
struct irs_nw *nw;
for (rule = pvt->rules; rule; rule = rule->next) {
nw = rule->inst->nw;
h_errno = NETDB_INTERNAL;
rval = (*nw->byaddr)(nw, net, length, type);
if (rval != NULL)
return (rval);
if (h_errno != TRY_AGAIN && !(rule->flags & IRS_CONTINUE))
break;
}
return (NULL);
}
static void
nw_rewind(struct irs_nw *this) {
struct pvt *pvt = (struct pvt *)this->private;
struct irs_nw *nw;
pvt->rule = pvt->rules;
if (pvt->rule) {
nw = pvt->rule->inst->nw;
(*nw->rewind)(nw);
}
}
static void
nw_minimize(struct irs_nw *this) {
struct pvt *pvt = (struct pvt *)this->private;
struct irs_rule *rule;
for (rule = pvt->rules; rule != NULL; rule = rule->next) {
struct irs_nw *nw = rule->inst->nw;
(*nw->minimize)(nw);
}
}
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