/* $NetBSD: gen_sv.c,v 1.1.1.2 2012/09/09 16:07:55 christos Exp $ */ /* * 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 1.3 2005/04/27 04:56:24 sra Exp "; #endif /* Imports */ #include "port_before.h" #include #include #include #include #include #include #include #include #include #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 */