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-rw-r--r--lib/bind/irs/nis_ho.c535
1 files changed, 535 insertions, 0 deletions
diff --git a/lib/bind/irs/nis_ho.c b/lib/bind/irs/nis_ho.c
new file mode 100644
index 0000000..7524279
--- /dev/null
+++ b/lib/bind/irs/nis_ho.c
@@ -0,0 +1,535 @@
+/*
+ * 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_ho.c,v 1.4.18.1 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/param.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 <ctype.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <netdb.h>
+#include <resolv.h>
+#include <stdio.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 MAXADDRS 35
+
+#if PACKETSZ > 1024
+#define MAXPACKET PACKETSZ
+#else
+#define MAXPACKET 1024
+#endif
+
+struct pvt {
+ int needrewind;
+ char * nis_domain;
+ char * curkey_data;
+ int curkey_len;
+ char * curval_data;
+ int curval_len;
+ struct hostent host;
+ char * h_addr_ptrs[MAXADDRS + 1];
+ char * host_aliases[MAXALIASES + 1];
+ char hostbuf[8*1024];
+ u_char host_addr[16]; /*%< IPv4 or IPv6 */
+ 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 u_char mapped[] = { 0,0, 0,0, 0,0, 0,0, 0,0, 0xff,0xff };
+static const u_char tunnelled[] = { 0,0, 0,0, 0,0, 0,0, 0,0, 0,0 };
+static /*const*/ char hosts_byname[] = "hosts.byname";
+static /*const*/ char hosts_byaddr[] = "hosts.byaddr";
+static /*const*/ char ipnode_byname[] = "ipnode.byname";
+static /*const*/ char ipnode_byaddr[] = "ipnode.byaddr";
+static /*const*/ char yp_multi[] = "YP_MULTI_";
+
+/* Forwards */
+
+static void ho_close(struct irs_ho *this);
+static struct hostent * ho_byname(struct irs_ho *this, const char *name);
+static struct hostent * ho_byname2(struct irs_ho *this, const char *name,
+ int af);
+static struct hostent * ho_byaddr(struct irs_ho *this, const void *addr,
+ int len, int af);
+static struct hostent * ho_next(struct irs_ho *this);
+static void ho_rewind(struct irs_ho *this);
+static void ho_minimize(struct irs_ho *this);
+static struct __res_state * ho_res_get(struct irs_ho *this);
+static void ho_res_set(struct irs_ho *this,
+ struct __res_state *res,
+ void (*free_res)(void *));
+static struct addrinfo * ho_addrinfo(struct irs_ho *this, const char *name,
+ const struct addrinfo *pai);
+
+static struct hostent * makehostent(struct irs_ho *this);
+static void nisfree(struct pvt *, enum do_what);
+static int init(struct irs_ho *this);
+
+/* Public */
+
+struct irs_ho *
+irs_nis_ho(struct irs_acc *this) {
+ struct irs_ho *ho;
+ struct pvt *pvt;
+
+ if (!(pvt = memget(sizeof *pvt))) {
+ errno = ENOMEM;
+ return (NULL);
+ }
+ memset(pvt, 0, sizeof *pvt);
+ if (!(ho = memget(sizeof *ho))) {
+ memput(pvt, sizeof *pvt);
+ errno = ENOMEM;
+ return (NULL);
+ }
+ memset(ho, 0x5e, sizeof *ho);
+ pvt->needrewind = 1;
+ pvt->nis_domain = ((struct nis_p *)this->private)->domain;
+ ho->private = pvt;
+ ho->close = ho_close;
+ ho->byname = ho_byname;
+ ho->byname2 = ho_byname2;
+ ho->byaddr = ho_byaddr;
+ ho->next = ho_next;
+ ho->rewind = ho_rewind;
+ ho->minimize = ho_minimize;
+ ho->res_set = ho_res_set;
+ ho->res_get = ho_res_get;
+ ho->addrinfo = ho_addrinfo;
+ return (ho);
+}
+
+/* Methods */
+
+static void
+ho_close(struct irs_ho *this) {
+ struct pvt *pvt = (struct pvt *)this->private;
+
+ ho_minimize(this);
+ nisfree(pvt, do_all);
+ if (pvt->res && pvt->free_res)
+ (*pvt->free_res)(pvt->res);
+ memput(pvt, sizeof *pvt);
+ memput(this, sizeof *this);
+}
+
+static struct hostent *
+ho_byname(struct irs_ho *this, const char *name) {
+ struct pvt *pvt = (struct pvt *)this->private;
+ struct hostent *hp;
+
+ if (init(this) == -1)
+ return (NULL);
+
+ if (pvt->res->options & RES_USE_INET6) {
+ hp = ho_byname2(this, name, AF_INET6);
+ if (hp)
+ return (hp);
+ }
+ return (ho_byname2(this, name, AF_INET));
+}
+
+static struct hostent *
+ho_byname2(struct irs_ho *this, const char *name, int af) {
+ struct pvt *pvt = (struct pvt *)this->private;
+ int r;
+ char *tmp;
+
+ UNUSED(af);
+
+ if (init(this) == -1)
+ return (NULL);
+
+ nisfree(pvt, do_val);
+
+ strcpy(pvt->hostbuf, yp_multi);
+ strncat(pvt->hostbuf, name, sizeof(pvt->hostbuf) - sizeof(yp_multi));
+ pvt->hostbuf[sizeof(pvt->hostbuf) - 1] = '\0';
+ for (r = sizeof(yp_multi) - 1; pvt->hostbuf[r] != '\0'; r++)
+ if (isupper((unsigned char)pvt->hostbuf[r]))
+ tolower(pvt->hostbuf[r]);
+
+ tmp = pvt->hostbuf;
+ r = yp_match(pvt->nis_domain, ipnode_byname, tmp,
+ strlen(tmp), &pvt->curval_data, &pvt->curval_len);
+ if (r != 0) {
+ tmp = pvt->hostbuf + sizeof(yp_multi) - 1;
+ r = yp_match(pvt->nis_domain, ipnode_byname, tmp,
+ strlen(tmp), &pvt->curval_data, &pvt->curval_len);
+ }
+ if (r != 0) {
+ tmp = pvt->hostbuf;
+ r = yp_match(pvt->nis_domain, hosts_byname, tmp,
+ strlen(tmp), &pvt->curval_data, &pvt->curval_len);
+ }
+ if (r != 0) {
+ tmp = pvt->hostbuf + sizeof(yp_multi) - 1;
+ r = yp_match(pvt->nis_domain, hosts_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 (makehostent(this));
+}
+
+static struct hostent *
+ho_byaddr(struct irs_ho *this, const void *addr, int len, int af) {
+ struct pvt *pvt = (struct pvt *)this->private;
+ char tmp[sizeof "ffff:ffff:ffff:ffff:ffff:ffff:255.255.255.255"];
+ const u_char *uaddr = addr;
+ int r;
+
+ if (init(this) == -1)
+ return (NULL);
+
+ if (af == AF_INET6 && len == IN6ADDRSZ &&
+ (!memcmp(uaddr, mapped, sizeof mapped) ||
+ !memcmp(uaddr, tunnelled, sizeof tunnelled))) {
+ /* Unmap. */
+ addr = (const u_char *)addr + sizeof mapped;
+ uaddr += sizeof mapped;
+ af = AF_INET;
+ len = INADDRSZ;
+ }
+ if (inet_ntop(af, uaddr, tmp, sizeof tmp) == NULL) {
+ RES_SET_H_ERRNO(pvt->res, NETDB_INTERNAL);
+ return (NULL);
+ }
+ nisfree(pvt, do_val);
+ r = yp_match(pvt->nis_domain, ipnode_byaddr, tmp, strlen(tmp),
+ &pvt->curval_data, &pvt->curval_len);
+ if (r != 0)
+ r = yp_match(pvt->nis_domain, hosts_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 (makehostent(this));
+}
+
+static struct hostent *
+ho_next(struct irs_ho *this) {
+ struct pvt *pvt = (struct pvt *)this->private;
+ struct hostent *rval;
+ int r;
+
+ if (init(this) == -1)
+ return (NULL);
+
+ do {
+ if (pvt->needrewind) {
+ nisfree(pvt, do_all);
+ r = yp_first(pvt->nis_domain, hosts_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, hosts_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 = makehostent(this);
+ } while (rval == NULL);
+ return (rval);
+}
+
+static void
+ho_rewind(struct irs_ho *this) {
+ struct pvt *pvt = (struct pvt *)this->private;
+
+ pvt->needrewind = 1;
+}
+
+static void
+ho_minimize(struct irs_ho *this) {
+ struct pvt *pvt = (struct pvt *)this->private;
+
+ if (pvt->res)
+ res_nclose(pvt->res);
+}
+
+static struct __res_state *
+ho_res_get(struct irs_ho *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);
+ ho_res_set(this, res, free);
+ }
+
+ return (pvt->res);
+}
+
+static void
+ho_res_set(struct irs_ho *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;
+}
+
+struct nis_res_target {
+ struct nis_res_target *next;
+ int family;
+};
+
+/* XXX */
+extern struct addrinfo *hostent2addrinfo __P((struct hostent *,
+ const struct addrinfo *pai));
+
+static struct addrinfo *
+ho_addrinfo(struct irs_ho *this, const char *name, const struct addrinfo *pai)
+{
+ struct pvt *pvt = (struct pvt *)this->private;
+ struct hostent *hp;
+ struct nis_res_target q, q2, *p;
+ struct addrinfo sentinel, *cur;
+
+ memset(&q, 0, sizeof(q2));
+ memset(&q2, 0, sizeof(q2));
+ memset(&sentinel, 0, sizeof(sentinel));
+ cur = &sentinel;
+
+ switch(pai->ai_family) {
+ case AF_UNSPEC: /*%< INET6 then INET4 */
+ q.family = AF_INET6;
+ q.next = &q2;
+ q2.family = AF_INET;
+ break;
+ case AF_INET6:
+ q.family = AF_INET6;
+ break;
+ case AF_INET:
+ q.family = AF_INET;
+ break;
+ default:
+ RES_SET_H_ERRNO(pvt->res, NO_RECOVERY); /*%< ??? */
+ return(NULL);
+ }
+
+ for (p = &q; p; p = p->next) {
+ struct addrinfo *ai;
+
+ hp = (*this->byname2)(this, name, p->family);
+ if (hp == NULL) {
+ /* byname2 should've set an appropriate error */
+ continue;
+ }
+ if ((hp->h_name == NULL) || (hp->h_name[0] == 0) ||
+ (hp->h_addr_list[0] == NULL)) {
+ RES_SET_H_ERRNO(pvt->res, NO_RECOVERY);
+ continue;
+ }
+ ai = hostent2addrinfo(hp, pai);
+ if (ai) {
+ cur->ai_next = ai;
+ while (cur && cur->ai_next)
+ cur = cur->ai_next;
+ }
+ }
+
+ if (sentinel.ai_next == NULL)
+ RES_SET_H_ERRNO(pvt->res, HOST_NOT_FOUND);
+
+ return(sentinel.ai_next);
+}
+
+/* Private */
+
+/*%
+ipnodes:
+::1 localhost
+127.0.0.1 localhost
+1.2.3.4 FOO bar
+1.2.6.4 FOO bar
+1.2.6.5 host
+
+ipnodes.byname:
+YP_MULTI_localhost ::1,127.0.0.1 localhost
+YP_MULTI_foo 1.2.3.4,1.2.6.4 FOO bar
+YP_MULTI_bar 1.2.3.4,1.2.6.4 FOO bar
+host 1.2.6.5 host
+
+hosts.byname:
+localhost 127.0.0.1 localhost
+host 1.2.6.5 host
+YP_MULTI_foo 1.2.3.4,1.2.6.4 FOO bar
+YP_MULTI_bar 1.2.3.4,1.2.6.4 FOO bar
+*/
+
+static struct hostent *
+makehostent(struct irs_ho *this) {
+ struct pvt *pvt = (struct pvt *)this->private;
+ static const char spaces[] = " \t";
+ char *cp, **q, *p, *comma, *ap;
+ int af = 0, len = 0;
+ int multi = 0;
+ int addr = 0;
+
+ p = pvt->curval_data;
+ if ((cp = strpbrk(p, "#\n")) != NULL)
+ *cp = '\0';
+ if (!(cp = strpbrk(p, spaces)))
+ return (NULL);
+ *cp++ = '\0';
+ ap = pvt->hostbuf;
+ do {
+ if ((comma = strchr(p, ',')) != NULL) {
+ *comma++ = '\0';
+ multi = 1;
+ }
+ if ((ap + IN6ADDRSZ) > (pvt->hostbuf + sizeof(pvt->hostbuf)))
+ break;
+ if ((pvt->res->options & RES_USE_INET6) &&
+ inet_pton(AF_INET6, p, ap) > 0) {
+ af = AF_INET6;
+ len = IN6ADDRSZ;
+ } else if (inet_pton(AF_INET, p, pvt->host_addr) > 0) {
+ if (pvt->res->options & RES_USE_INET6) {
+ map_v4v6_address((char*)pvt->host_addr, ap);
+ af = AF_INET6;
+ len = IN6ADDRSZ;
+ } else {
+ af = AF_INET;
+ len = INADDRSZ;
+ }
+ } else {
+ if (!multi)
+ return (NULL);
+ continue;
+ }
+ if (addr < MAXADDRS) {
+ pvt->h_addr_ptrs[addr++] = ap;
+ pvt->h_addr_ptrs[addr] = NULL;
+ ap += len;
+ }
+ } while ((p = comma) != NULL);
+ if (ap == pvt->hostbuf)
+ return (NULL);
+ pvt->host.h_addr_list = pvt->h_addr_ptrs;
+ pvt->host.h_length = len;
+ pvt->host.h_addrtype = af;
+ cp += strspn(cp, spaces);
+ pvt->host.h_name = cp;
+ q = pvt->host.h_aliases = pvt->host_aliases;
+ if ((cp = strpbrk(cp, spaces)) != NULL)
+ *cp++ = '\0';
+ while (cp && *cp) {
+ if (*cp == ' ' || *cp == '\t') {
+ cp++;
+ continue;
+ }
+ if (q < &pvt->host_aliases[MAXALIASES])
+ *q++ = cp;
+ if ((cp = strpbrk(cp, spaces)) != NULL)
+ *cp++ = '\0';
+ }
+ *q = NULL;
+ RES_SET_H_ERRNO(pvt->res, NETDB_SUCCESS);
+ return (&pvt->host);
+}
+
+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_ho *this) {
+ struct pvt *pvt = (struct pvt *)this->private;
+
+ if (!pvt->res && !ho_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 */
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