summaryrefslogtreecommitdiffstats
path: root/lib/bind/irs/nis_nw.c
diff options
context:
space:
mode:
Diffstat (limited to 'lib/bind/irs/nis_nw.c')
-rw-r--r--lib/bind/irs/nis_nw.c385
1 files changed, 385 insertions, 0 deletions
diff --git a/lib/bind/irs/nis_nw.c b/lib/bind/irs/nis_nw.c
new file mode 100644
index 0000000..2fb50dc
--- /dev/null
+++ b/lib/bind/irs/nis_nw.c
@@ -0,0 +1,385 @@
+/*
+ * 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: nis_nw.c,v 1.3.18.1 2005/04/27 05:01:03 sra Exp $";
+#endif /* LIBC_SCCS and not lint */
+
+/* Imports */
+
+#include "port_before.h"
+
+#ifndef WANT_IRS_NIS
+static int __bind_irs_nis_unneeded;
+#else
+
+#include <sys/types.h>
+#include <sys/socket.h>
+
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <arpa/nameser.h>
+#ifdef T_NULL
+#undef T_NULL /* Silence re-definition warning of T_NULL. */
+#endif
+#include <rpc/rpc.h>
+#include <rpc/xdr.h>
+#include <rpcsvc/yp_prot.h>
+#include <rpcsvc/ypclnt.h>
+
+#include <errno.h>
+#include <resolv.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <isc/memcluster.h>
+#include <irs.h>
+
+#include "port_after.h"
+
+#include "irs_p.h"
+#include "nis_p.h"
+
+/* Definitions */
+
+#define MAXALIASES 35
+#define MAXADDRSIZE 4
+
+struct pvt {
+ int needrewind;
+ char * nis_domain;
+ char * curkey_data;
+ int curkey_len;
+ char * curval_data;
+ int curval_len;
+
+ struct nwent nwent;
+ char * nwbuf;
+
+ char * aliases[MAXALIASES + 1];
+ u_char addr[MAXADDRSIZE];
+
+ struct __res_state * res;
+ void (*free_res)(void *);
+};
+
+enum do_what { do_none = 0x0, do_key = 0x1, do_val = 0x2, do_all = 0x3 };
+
+static /*const*/ char networks_byname[] = "networks.byname";
+static /*const*/ char networks_byaddr[] = "networks.byaddr";
+
+/* Forward */
+
+static void nw_close(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 struct nwent * nw_next(struct irs_nw *);
+static void nw_rewind(struct irs_nw *);
+static void nw_minimize(struct irs_nw *);
+static struct __res_state * nw_res_get(struct irs_nw *this);
+static void nw_res_set(struct irs_nw *this,
+ struct __res_state *res,
+ void (*free_res)(void *));
+
+static struct nwent * makenwent(struct irs_nw *this);
+static void nisfree(struct pvt *, enum do_what);
+static int init(struct irs_nw *this);
+
+/* Public */
+
+struct irs_nw *
+irs_nis_nw(struct irs_acc *this) {
+ struct irs_nw *nw;
+ struct pvt *pvt;
+
+ if (!(pvt = memget(sizeof *pvt))) {
+ errno = ENOMEM;
+ return (NULL);
+ }
+ memset(pvt, 0, sizeof *pvt);
+ if (!(nw = memget(sizeof *nw))) {
+ memput(pvt, sizeof *pvt);
+ errno = ENOMEM;
+ return (NULL);
+ }
+ memset(nw, 0x5e, sizeof *nw);
+ pvt->needrewind = 1;
+ pvt->nis_domain = ((struct nis_p *)this->private)->domain;
+ nw->private = pvt;
+ nw->close = nw_close;
+ nw->byname = nw_byname;
+ nw->byaddr = nw_byaddr;
+ nw->next = nw_next;
+ nw->rewind = nw_rewind;
+ nw->minimize = nw_minimize;
+ nw->res_get = nw_res_get;
+ nw->res_set = nw_res_set;
+ return (nw);
+}
+
+/* Methods */
+
+static void
+nw_close(struct irs_nw *this) {
+ struct pvt *pvt = (struct pvt *)this->private;
+
+ nw_minimize(this);
+ if (pvt->res && pvt->free_res)
+ (*pvt->free_res)(pvt->res);
+ if (pvt->nwbuf)
+ free(pvt->nwbuf);
+ memput(pvt, sizeof *pvt);
+ memput(this, sizeof *this);
+}
+
+static struct nwent *
+nw_byaddr(struct irs_nw *this, void *net, int length, int af) {
+ struct pvt *pvt = (struct pvt *)this->private;
+ char tmp[sizeof "255.255.255.255/32"], *t;
+ int r;
+
+ if (init(this) == -1)
+ return (NULL);
+
+ if (af != AF_INET) {
+ RES_SET_H_ERRNO(pvt->res, NETDB_INTERNAL);
+ errno = EAFNOSUPPORT;
+ return (NULL);
+ }
+ nisfree(pvt, do_val);
+ /* Try it with /CIDR first. */
+ if (inet_net_ntop(AF_INET, net, length, tmp, sizeof tmp) == NULL) {
+ RES_SET_H_ERRNO(pvt->res, NETDB_INTERNAL);
+ return (NULL);
+ }
+ r = yp_match(pvt->nis_domain, networks_byaddr, tmp, strlen(tmp),
+ &pvt->curval_data, &pvt->curval_len);
+ if (r != 0) {
+ /* Give it a shot without the /CIDR. */
+ if ((t = strchr(tmp, '/')) != NULL) {
+ *t = '\0';
+ r = yp_match(pvt->nis_domain, networks_byaddr,
+ tmp, strlen(tmp),
+ &pvt->curval_data, &pvt->curval_len);
+ }
+ if (r != 0) {
+ RES_SET_H_ERRNO(pvt->res, HOST_NOT_FOUND);
+ return (NULL);
+ }
+ }
+ return (makenwent(this));
+}
+
+static struct nwent *
+nw_byname(struct irs_nw *this, const char *name, int af) {
+ struct pvt *pvt = (struct pvt *)this->private;
+ int r;
+ char *tmp;
+
+ if (init(this) == -1)
+ return (NULL);
+
+ if (af != AF_INET) {
+ RES_SET_H_ERRNO(pvt->res, NETDB_INTERNAL);
+ errno = EAFNOSUPPORT;
+ return (NULL);
+ }
+ nisfree(pvt, do_val);
+ DE_CONST(name, tmp);
+ r = yp_match(pvt->nis_domain, networks_byname, tmp,
+ strlen(tmp), &pvt->curval_data, &pvt->curval_len);
+ if (r != 0) {
+ RES_SET_H_ERRNO(pvt->res, HOST_NOT_FOUND);
+ return (NULL);
+ }
+ return (makenwent(this));
+}
+
+static void
+nw_rewind(struct irs_nw *this) {
+ struct pvt *pvt = (struct pvt *)this->private;
+
+ pvt->needrewind = 1;
+}
+
+static struct nwent *
+nw_next(struct irs_nw *this) {
+ struct pvt *pvt = (struct pvt *)this->private;
+ struct nwent *rval;
+ int r;
+
+ if (init(this) == -1)
+ return (NULL);
+
+ do {
+ if (pvt->needrewind) {
+ nisfree(pvt, do_all);
+ r = yp_first(pvt->nis_domain, networks_byaddr,
+ &pvt->curkey_data, &pvt->curkey_len,
+ &pvt->curval_data, &pvt->curval_len);
+ pvt->needrewind = 0;
+ } else {
+ char *newkey_data;
+ int newkey_len;
+
+ nisfree(pvt, do_val);
+ r = yp_next(pvt->nis_domain, networks_byaddr,
+ pvt->curkey_data, pvt->curkey_len,
+ &newkey_data, &newkey_len,
+ &pvt->curval_data, &pvt->curval_len);
+ nisfree(pvt, do_key);
+ pvt->curkey_data = newkey_data;
+ pvt->curkey_len = newkey_len;
+ }
+ if (r != 0) {
+ RES_SET_H_ERRNO(pvt->res, HOST_NOT_FOUND);
+ return (NULL);
+ }
+ rval = makenwent(this);
+ } while (rval == NULL);
+ return (rval);
+}
+
+static void
+nw_minimize(struct irs_nw *this) {
+ struct pvt *pvt = (struct pvt *)this->private;
+
+ if (pvt->res)
+ res_nclose(pvt->res);
+}
+
+static struct __res_state *
+nw_res_get(struct irs_nw *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);
+ nw_res_set(this, res, free);
+ }
+
+ return (pvt->res);
+}
+
+static void
+nw_res_set(struct irs_nw *this, struct __res_state *res,
+ void (*free_res)(void *)) {
+ struct pvt *pvt = (struct pvt *)this->private;
+
+ if (pvt->res && pvt->free_res) {
+ res_nclose(pvt->res);
+ (*pvt->free_res)(pvt->res);
+ }
+
+ pvt->res = res;
+ pvt->free_res = free_res;
+}
+
+/* Private */
+
+static struct nwent *
+makenwent(struct irs_nw *this) {
+ struct pvt *pvt = (struct pvt *)this->private;
+ static const char spaces[] = " \t";
+ char *t, *cp, **ap;
+
+ if (pvt->nwbuf)
+ free(pvt->nwbuf);
+ pvt->nwbuf = pvt->curval_data;
+ pvt->curval_data = NULL;
+
+ if ((cp = strpbrk(pvt->nwbuf, "#\n")) != NULL)
+ *cp = '\0';
+ cp = pvt->nwbuf;
+
+ /* Name */
+ pvt->nwent.n_name = cp;
+ cp += strcspn(cp, spaces);
+ if (!*cp)
+ goto cleanup;
+ *cp++ = '\0';
+ cp += strspn(cp, spaces);
+
+ /* Network */
+ pvt->nwent.n_addrtype = AF_INET;
+ t = cp + strcspn(cp, spaces);
+ if (*t)
+ *t++ = '\0';
+ pvt->nwent.n_length = inet_net_pton(AF_INET, cp,
+ pvt->addr, sizeof pvt->addr);
+ if (pvt->nwent.n_length < 0)
+ goto cleanup;
+ pvt->nwent.n_addr = pvt->addr;
+ cp = t;
+
+ /* Aliases */
+ ap = pvt->nwent.n_aliases = pvt->aliases;
+ while (*cp) {
+ if (ap >= &pvt->aliases[MAXALIASES])
+ break;
+ *ap++ = cp;
+ cp += strcspn(cp, spaces);
+ if (!*cp)
+ break;
+ *cp++ = '\0';
+ cp += strspn(cp, spaces);
+ }
+ *ap = NULL;
+
+ return (&pvt->nwent);
+
+ cleanup:
+ if (pvt->nwbuf) {
+ free(pvt->nwbuf);
+ pvt->nwbuf = NULL;
+ }
+ return (NULL);
+}
+
+static void
+nisfree(struct pvt *pvt, enum do_what do_what) {
+ if ((do_what & do_key) && pvt->curkey_data) {
+ free(pvt->curkey_data);
+ pvt->curkey_data = NULL;
+ }
+ if ((do_what & do_val) && pvt->curval_data) {
+ free(pvt->curval_data);
+ pvt->curval_data = NULL;
+ }
+}
+
+static int
+init(struct irs_nw *this) {
+ struct pvt *pvt = (struct pvt *)this->private;
+
+ if (!pvt->res && !nw_res_get(this))
+ return (-1);
+ if (((pvt->res->options & RES_INIT) == 0) &&
+ res_ninit(pvt->res) == -1)
+ return (-1);
+ return (0);
+}
+
+#endif /*WANT_IRS_NIS*/
+
+/*! \file */
OpenPOWER on IntegriCloud