diff options
Diffstat (limited to 'lib/bind/irs/gen_pr.c')
| -rw-r--r-- | lib/bind/irs/gen_pr.c | 228 |
1 files changed, 228 insertions, 0 deletions
diff --git a/lib/bind/irs/gen_pr.c b/lib/bind/irs/gen_pr.c new file mode 100644 index 0000000..5c9d69c --- /dev/null +++ b/lib/bind/irs/gen_pr.c @@ -0,0 +1,228 @@ +/* + * 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 1.2.18.1 2005/04/27 05:00:56 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 */ |
