2 * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
3 * Copyright (c) 1996,1999 by Internet Software Consortium.
5 * Permission to use, copy, modify, and distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
9 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
15 * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
18 #if !defined(LINT) && !defined(CODECENTER)
19 static const char rcsid[] = "$Id: gen_sv.c,v 1.2.18.1 2005/04/27 05:00:57 sra Exp $";
24 #include "port_before.h"
26 #include <sys/types.h>
27 #include <netinet/in.h>
28 #include <arpa/nameser.h>
35 #include <isc/memcluster.h>
38 #include "port_after.h"
46 struct irs_rule * rules;
47 struct irs_rule * rule;
48 struct __res_state * res;
49 void (*free_res)(void *);
54 static void sv_close(struct irs_sv*);
55 static struct servent * sv_next(struct irs_sv *);
56 static struct servent * sv_byname(struct irs_sv *, const char *,
58 static struct servent * sv_byport(struct irs_sv *, int, const char *);
59 static void sv_rewind(struct irs_sv *);
60 static void sv_minimize(struct irs_sv *);
61 static struct __res_state * sv_res_get(struct irs_sv *);
62 static void sv_res_set(struct irs_sv *,
69 irs_gen_sv(struct irs_acc *this) {
70 struct gen_p *accpvt = (struct gen_p *)this->private;
74 if (!(sv = memget(sizeof *sv))) {
78 memset(sv, 0x5e, sizeof *sv);
79 if (!(pvt = memget(sizeof *pvt))) {
80 memput(sv, sizeof *sv);
84 memset(pvt, 0, sizeof *pvt);
85 pvt->rules = accpvt->map_rules[irs_sv];
86 pvt->rule = pvt->rules;
90 sv->byname = sv_byname;
91 sv->byport = sv_byport;
92 sv->rewind = sv_rewind;
93 sv->minimize = sv_minimize;
94 sv->res_get = sv_res_get;
95 sv->res_set = sv_res_set;
102 sv_close(struct irs_sv *this) {
103 struct pvt *pvt = (struct pvt *)this->private;
105 memput(pvt, sizeof *pvt);
106 memput(this, sizeof *this);
109 static struct servent *
110 sv_next(struct irs_sv *this) {
111 struct pvt *pvt = (struct pvt *)this->private;
112 struct servent *rval;
116 sv = pvt->rule->inst->sv;
117 rval = (*sv->next)(sv);
120 if (!(pvt->rule->flags & IRS_CONTINUE))
122 pvt->rule = pvt->rule->next;
124 sv = pvt->rule->inst->sv;
131 static struct servent *
132 sv_byname(struct irs_sv *this, const char *name, const char *proto) {
133 struct pvt *pvt = (struct pvt *)this->private;
134 struct irs_rule *rule;
135 struct servent *rval;
139 for (rule = pvt->rules; rule; rule = rule->next) {
141 rval = (*sv->byname)(sv, name, proto);
142 if (rval || !(rule->flags & IRS_CONTINUE))
148 static struct servent *
149 sv_byport(struct irs_sv *this, int port, const char *proto) {
150 struct pvt *pvt = (struct pvt *)this->private;
151 struct irs_rule *rule;
152 struct servent *rval;
156 for (rule = pvt->rules; rule; rule = rule->next) {
158 rval = (*sv->byport)(sv, port, proto);
159 if (rval || !(rule->flags & IRS_CONTINUE))
166 sv_rewind(struct irs_sv *this) {
167 struct pvt *pvt = (struct pvt *)this->private;
170 pvt->rule = pvt->rules;
172 sv = pvt->rule->inst->sv;
178 sv_minimize(struct irs_sv *this) {
179 struct pvt *pvt = (struct pvt *)this->private;
180 struct irs_rule *rule;
182 for (rule = pvt->rules; rule != NULL; rule = rule->next) {
183 struct irs_sv *sv = rule->inst->sv;
189 static struct __res_state *
190 sv_res_get(struct irs_sv *this) {
191 struct pvt *pvt = (struct pvt *)this->private;
194 struct __res_state *res;
195 res = (struct __res_state *)malloc(sizeof *res);
200 memset(res, 0, sizeof *res);
201 sv_res_set(this, res, free);
208 sv_res_set(struct irs_sv *this, struct __res_state *res,
209 void (*free_res)(void *)) {
210 struct pvt *pvt = (struct pvt *)this->private;
211 struct irs_rule *rule;
213 if (pvt->res && pvt->free_res) {
214 res_nclose(pvt->res);
215 (*pvt->free_res)(pvt->res);
219 pvt->free_res = free_res;
221 for (rule = pvt->rules; rule != NULL; rule = rule->next) {
222 struct irs_sv *sv = rule->inst->sv;
225 (*sv->res_set)(sv, pvt->res, NULL);