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-rw-r--r--lib/bind/irs/dns_pr.c268
1 files changed, 268 insertions, 0 deletions
diff --git a/lib/bind/irs/dns_pr.c b/lib/bind/irs/dns_pr.c
new file mode 100644
index 0000000..7582f85
--- /dev/null
+++ b/lib/bind/irs/dns_pr.c
@@ -0,0 +1,268 @@
+/*
+ * 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(LIBC_SCCS) && !defined(lint)
+static const char rcsid[] = "$Id: dns_pr.c,v 1.4.18.1 2005/04/27 05:00:55 sra Exp $";
+#endif
+
+/* Imports */
+
+#include "port_before.h"
+
+#include <sys/types.h>
+#include <netinet/in.h>
+#include <arpa/nameser.h>
+#include <resolv.h>
+
+#include <stdio.h>
+#include <string.h>
+#include <netdb.h>
+#include <ctype.h>
+#include <stdlib.h>
+#include <errno.h>
+
+#include <isc/memcluster.h>
+#include <irs.h>
+
+#include "port_after.h"
+
+#include "irs_p.h"
+#include "hesiod.h"
+#include "dns_p.h"
+
+/* Types. */
+
+struct pvt {
+ struct dns_p * dns;
+ struct protoent proto;
+ char * prbuf;
+};
+
+/* Forward. */
+
+static void pr_close(struct irs_pr *);
+static struct protoent * pr_byname(struct irs_pr *, const char *);
+static struct protoent * pr_bynumber(struct irs_pr *, int);
+static struct protoent * pr_next(struct irs_pr *);
+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 *));
+
+static struct protoent * parse_hes_list(struct irs_pr *, char **);
+
+/* Public. */
+
+struct irs_pr *
+irs_dns_pr(struct irs_acc *this) {
+ struct dns_p *dns = (struct dns_p *)this->private;
+ struct pvt *pvt;
+ struct irs_pr *pr;
+
+ if (!dns->hes_ctx) {
+ errno = ENODEV;
+ return (NULL);
+ }
+ if (!(pvt = memget(sizeof *pvt))) {
+ errno = ENOMEM;
+ return (NULL);
+ }
+ memset(pvt, 0, sizeof *pvt);
+ if (!(pr = memget(sizeof *pr))) {
+ memput(pvt, sizeof *pvt);
+ errno = ENOMEM;
+ return (NULL);
+ }
+ memset(pr, 0x5e, sizeof *pr);
+ pvt->dns = dns;
+ pr->private = pvt;
+ pr->byname = pr_byname;
+ pr->bynumber = pr_bynumber;
+ pr->next = pr_next;
+ pr->rewind = pr_rewind;
+ pr->close = pr_close;
+ 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;
+
+ if (pvt->proto.p_aliases)
+ free(pvt->proto.p_aliases);
+ if (pvt->prbuf)
+ free(pvt->prbuf);
+
+ memput(pvt, sizeof *pvt);
+ memput(this, sizeof *this);
+}
+
+static struct protoent *
+pr_byname(struct irs_pr *this, const char *name) {
+ struct pvt *pvt = (struct pvt *)this->private;
+ struct dns_p *dns = pvt->dns;
+ struct protoent *proto;
+ char **hes_list;
+
+ if (!(hes_list = hesiod_resolve(dns->hes_ctx, name, "protocol")))
+ return (NULL);
+
+ proto = parse_hes_list(this, hes_list);
+ hesiod_free_list(dns->hes_ctx, hes_list);
+ return (proto);
+}
+
+static struct protoent *
+pr_bynumber(struct irs_pr *this, int num) {
+ struct pvt *pvt = (struct pvt *)this->private;
+ struct dns_p *dns = pvt->dns;
+ struct protoent *proto;
+ char numstr[16];
+ char **hes_list;
+
+ sprintf(numstr, "%d", num);
+ if (!(hes_list = hesiod_resolve(dns->hes_ctx, numstr, "protonum")))
+ return (NULL);
+
+ proto = parse_hes_list(this, hes_list);
+ hesiod_free_list(dns->hes_ctx, hes_list);
+ return (proto);
+}
+
+static struct protoent *
+pr_next(struct irs_pr *this) {
+ UNUSED(this);
+ errno = ENODEV;
+ return (NULL);
+}
+
+static void
+pr_rewind(struct irs_pr *this) {
+ UNUSED(this);
+ /* NOOP */
+}
+
+static void
+pr_minimize(struct irs_pr *this) {
+ UNUSED(this);
+ /* NOOP */
+}
+
+static struct __res_state *
+pr_res_get(struct irs_pr *this) {
+ struct pvt *pvt = (struct pvt *)this->private;
+ struct dns_p *dns = pvt->dns;
+
+ return (__hesiod_res_get(dns->hes_ctx));
+}
+
+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 dns_p *dns = pvt->dns;
+
+ __hesiod_res_set(dns->hes_ctx, res, free_res);
+}
+
+/* Private. */
+
+static struct protoent *
+parse_hes_list(struct irs_pr *this, char **hes_list) {
+ struct pvt *pvt = (struct pvt *)this->private;
+ char *p, *cp, **cpp, **new;
+ int num = 0;
+ int max = 0;
+
+ for (cpp = hes_list; *cpp; cpp++) {
+ cp = *cpp;
+
+ /* Strip away comments, if any. */
+ if ((p = strchr(cp, '#')))
+ *p = 0;
+
+ /* Skip blank lines. */
+ p = cp;
+ while (*p && !isspace((unsigned char)*p))
+ p++;
+ if (!*p)
+ continue;
+
+ /* OK, we've got a live one. Let's parse it for real. */
+ if (pvt->prbuf)
+ free(pvt->prbuf);
+ pvt->prbuf = strdup(cp);
+
+ p = pvt->prbuf;
+ pvt->proto.p_name = p;
+ while (*p && !isspace((unsigned char)*p))
+ p++;
+ if (!*p)
+ continue;
+ *p++ = '\0';
+
+ pvt->proto.p_proto = atoi(p);
+ while (*p && !isspace((unsigned char)*p))
+ p++;
+ if (*p)
+ *p++ = '\0';
+
+ while (*p) {
+ if ((num + 1) >= max || !pvt->proto.p_aliases) {
+ max += 10;
+ new = realloc(pvt->proto.p_aliases,
+ max * sizeof(char *));
+ if (!new) {
+ errno = ENOMEM;
+ goto cleanup;
+ }
+ pvt->proto.p_aliases = new;
+ }
+ pvt->proto.p_aliases[num++] = p;
+ while (*p && !isspace((unsigned char)*p))
+ p++;
+ if (*p)
+ *p++ = '\0';
+ }
+ if (!pvt->proto.p_aliases)
+ pvt->proto.p_aliases = malloc(sizeof(char *));
+ if (!pvt->proto.p_aliases)
+ goto cleanup;
+ pvt->proto.p_aliases[num] = NULL;
+ return (&pvt->proto);
+ }
+
+ cleanup:
+ if (pvt->proto.p_aliases) {
+ free(pvt->proto.p_aliases);
+ pvt->proto.p_aliases = NULL;
+ }
+ if (pvt->prbuf) {
+ free(pvt->prbuf);
+ pvt->prbuf = NULL;
+ }
+ return (NULL);
+}
+
+/*! \file */
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