Flatten bind9 vendor work area

1 files changed, 578 insertions, 0 deletions

diff --git a/lib/bind/irs/lcl_ho.c b/lib/bind/irs/lcl_ho.c
new file mode 100644
index 0000000..9534ee6
--- /dev/null
+++ b/lib/bind/irs/lcl_ho.c
@@ -0,0 +1,578 @@
+/*
+ * Copyright (c) 1985, 1988, 1993
+ *    The Regents of the University of California.  All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ * 	This product includes software developed by the University of
+ * 	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+/*
+ * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
+ * Portions 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.
+ */
+
+/* from gethostnamadr.c	8.1 (Berkeley) 6/4/93 */
+/* BIND Id: gethnamaddr.c,v 8.15 1996/05/22 04:56:30 vixie Exp $ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static const char rcsid[] = "$Id: lcl_ho.c,v 1.3.18.2 2006/03/10 00:20:08 marka Exp $";
+#endif /* LIBC_SCCS and not lint */
+
+/* Imports. */
+
+#include "port_before.h"
+
+#include <sys/types.h>
+#include <sys/param.h>
+#include <sys/socket.h>
+
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <arpa/nameser.h>
+
+#include <ctype.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <netdb.h>
+#include <resolv.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <irs.h>
+#include <isc/memcluster.h>
+
+#include "port_after.h"
+
+#include "irs_p.h"
+#include "dns_p.h"
+#include "lcl_p.h"
+
+#ifdef SPRINTF_CHAR
+# define SPRINTF(x) strlen(sprintf/**/x)
+#else
+# define SPRINTF(x) sprintf x
+#endif
+
+/* Definitions. */
+
+#define	MAXALIASES	35
+#define	MAXADDRS	35
+#define	Max(a,b)	((a) > (b) ? (a) : (b))
+
+#if PACKETSZ > 1024
+#define	MAXPACKET	PACKETSZ
+#else
+#define	MAXPACKET	1024
+#endif
+
+struct pvt {
+	FILE *		fp;
+	struct hostent	host;
+	char *		h_addr_ptrs[MAXADDRS + 1];
+	char *		host_aliases[MAXALIASES];
+	char		hostbuf[8*1024];
+	u_char		host_addr[16];	/*%< IPv4 or IPv6 */
+	struct __res_state  *res;
+	void		(*free_res)(void *);
+};
+
+typedef union {
+	int32_t al;
+	char ac;
+} align;
+
+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 };
+
+/* Forward. */
+
+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 size_t		ns_namelen(const char *);
+static int		init(struct irs_ho *this);
+
+/* Portability. */
+
+#ifndef SEEK_SET
+# define SEEK_SET 0
+#endif
+
+/* Public. */
+
+struct irs_ho *
+irs_lcl_ho(struct irs_acc *this) {
+	struct irs_ho *ho;
+	struct pvt *pvt;
+
+	UNUSED(this);
+
+	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);
+	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_get = ho_res_get;
+	ho->res_set = ho_res_set;
+	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);
+	if (pvt->fp)
+		(void) fclose(pvt->fp);
+	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;
+	struct hostent *hp;
+	char **hap;
+	size_t n;
+	
+	if (init(this) == -1)
+		return (NULL);
+
+	ho_rewind(this);
+	n = ns_namelen(name);
+	while ((hp = ho_next(this)) != NULL) {
+		size_t nn;
+
+		if (hp->h_addrtype != af)
+			continue;
+		nn = ns_namelen(hp->h_name);
+		if (strncasecmp(hp->h_name, name, Max(n, nn)) == 0)
+			goto found;
+		for (hap = hp->h_aliases; *hap; hap++) {
+			nn = ns_namelen(*hap);
+			if (strncasecmp(*hap, name, Max(n, nn)) == 0)
+				goto found;
+		}
+	}
+ found:
+	if (!hp) {
+		RES_SET_H_ERRNO(pvt->res, HOST_NOT_FOUND);
+		return (NULL);
+	}
+	RES_SET_H_ERRNO(pvt->res, NETDB_SUCCESS);
+	return (hp);
+}
+
+static struct hostent *
+ho_byaddr(struct irs_ho *this, const void *addr, int len, int af) {
+	struct pvt *pvt = (struct pvt *)this->private;
+	const u_char *uaddr = addr;
+	struct hostent *hp;
+	int size;
+	
+	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;
+	}
+	switch (af) {
+	case AF_INET:
+		size = INADDRSZ;
+		break;
+	case AF_INET6:
+		size = IN6ADDRSZ;
+		break;
+	default:
+		errno = EAFNOSUPPORT;
+		RES_SET_H_ERRNO(pvt->res, NETDB_INTERNAL);
+		return (NULL);
+	}
+	if (size > len) {
+		errno = EINVAL;
+		RES_SET_H_ERRNO(pvt->res, NETDB_INTERNAL);
+		return (NULL);
+	}
+
+	/*
+	 * Do the search.
+	 */
+	ho_rewind(this);
+	while ((hp = ho_next(this)) != NULL) {
+		char **hap;
+
+		for (hap = hp->h_addr_list; *hap; hap++) {
+			const u_char *taddr = (const u_char *)*hap;
+			int taf = hp->h_addrtype;
+			int tlen = hp->h_length;
+
+			if (taf == AF_INET6 && tlen == IN6ADDRSZ &&
+			    (!memcmp(taddr, mapped, sizeof mapped) ||
+			     !memcmp(taddr, tunnelled, sizeof tunnelled))) {
+				/* Unmap. */
+				taddr += sizeof mapped;
+				taf = AF_INET;
+				tlen = INADDRSZ;
+			}
+			if (taf == af && tlen == len &&
+			    !memcmp(taddr, uaddr, tlen))
+				goto found;
+		}
+	}
+ found:
+	if (!hp) {
+		RES_SET_H_ERRNO(pvt->res, HOST_NOT_FOUND);
+		return (NULL);
+	}
+	RES_SET_H_ERRNO(pvt->res, NETDB_SUCCESS);
+	return (hp);
+}
+
+static struct hostent *
+ho_next(struct irs_ho *this) {
+	struct pvt *pvt = (struct pvt *)this->private;
+	char *cp, **q, *p;
+	char *bufp, *ndbuf, *dbuf = NULL;
+	int c, af, len, bufsiz, offset;
+
+	if (init(this) == -1)
+		return (NULL);
+
+	if (!pvt->fp)
+		ho_rewind(this);
+	if (!pvt->fp) {
+		RES_SET_H_ERRNO(pvt->res, NETDB_INTERNAL);
+		return (NULL);
+	}
+	bufp = pvt->hostbuf;
+	bufsiz = sizeof pvt->hostbuf;
+	offset = 0;
+ again:
+	if (!(p = fgets(bufp + offset, bufsiz - offset, pvt->fp))) {
+		RES_SET_H_ERRNO(pvt->res, HOST_NOT_FOUND);
+		if (dbuf)
+			free(dbuf);
+		return (NULL);
+	}
+	if (!strchr(p, '\n') && !feof(pvt->fp)) {
+#define GROWBUF 1024
+		/* allocate space for longer line */
+		if (dbuf == NULL) {
+			if ((ndbuf = malloc(bufsiz + GROWBUF)) != NULL)
+				strcpy(ndbuf, bufp);
+		} else
+			ndbuf = realloc(dbuf, bufsiz + GROWBUF);
+		if (ndbuf) {
+			dbuf = ndbuf;
+			bufp = dbuf;
+			bufsiz += GROWBUF;
+			offset = strlen(dbuf);
+		} else {
+			/* allocation failed; skip this long line */
+			while ((c = getc(pvt->fp)) != EOF)
+				if (c == '\n')
+					break;
+			if (c != EOF)
+				ungetc(c, pvt->fp);
+		}
+		goto again;
+	}
+
+	p -= offset;
+	offset = 0;
+
+	if (*p == '#')
+		goto again;
+	if ((cp = strpbrk(p, "#\n")) != NULL)
+		*cp = '\0';
+	if (!(cp = strpbrk(p, " \t")))
+		goto again;
+	*cp++ = '\0';
+	if (inet_pton(AF_INET6, p, pvt->host_addr) > 0) {
+		af = AF_INET6;
+		len = IN6ADDRSZ;
+	} else if (inet_aton(p, (struct in_addr *)pvt->host_addr) > 0) {
+		if (pvt->res->options & RES_USE_INET6) {
+			map_v4v6_address((char*)pvt->host_addr,
+					 (char*)pvt->host_addr);
+			af = AF_INET6;
+			len = IN6ADDRSZ;
+		} else {
+			af = AF_INET;
+			len = INADDRSZ;
+		}
+	} else {
+		goto again;
+	}
+	pvt->h_addr_ptrs[0] = (char *)pvt->host_addr;
+	pvt->h_addr_ptrs[1] = NULL;
+	pvt->host.h_addr_list = pvt->h_addr_ptrs;
+	pvt->host.h_length = len;
+	pvt->host.h_addrtype = af;
+	while (*cp == ' ' || *cp == '\t')
+		cp++;
+	pvt->host.h_name = cp;
+	q = pvt->host.h_aliases = pvt->host_aliases;
+	if ((cp = strpbrk(cp, " \t")) != NULL)
+		*cp++ = '\0';
+	while (cp && *cp) {
+		if (*cp == ' ' || *cp == '\t') {
+			cp++;
+			continue;
+		}
+		if (q < &pvt->host_aliases[MAXALIASES - 1])
+			*q++ = cp;
+		if ((cp = strpbrk(cp, " \t")) != NULL)
+			*cp++ = '\0';
+	}
+	*q = NULL;
+	if (dbuf)
+		free(dbuf);
+	RES_SET_H_ERRNO(pvt->res, NETDB_SUCCESS);
+	return (&pvt->host);
+}
+
+static void
+ho_rewind(struct irs_ho *this) {
+	struct pvt *pvt = (struct pvt *)this->private;
+
+	if (pvt->fp) {
+		if (fseek(pvt->fp, 0L, SEEK_SET) == 0)
+			return;
+		(void)fclose(pvt->fp);
+	}
+	if (!(pvt->fp = fopen(_PATH_HOSTS, "r")))
+		return;
+	if (fcntl(fileno(pvt->fp), F_SETFD, 1) < 0) {
+		(void)fclose(pvt->fp);
+		pvt->fp = NULL;
+	}
+}
+
+static void
+ho_minimize(struct irs_ho *this) {
+	struct pvt *pvt = (struct pvt *)this->private;
+
+	if (pvt->fp != NULL) {
+		(void)fclose(pvt->fp);
+		pvt->fp = NULL;
+	}
+	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 lcl_res_target {
+	struct lcl_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 lcl_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->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. */
+
+static size_t
+ns_namelen(const char *s) {
+	int i;
+
+	for (i = strlen(s); i > 0 && s[i-1] == '.'; i--)
+		(void)NULL;
+	return ((size_t) i);
+}
+
+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) == 0U) &&
+	    res_ninit(pvt->res) == -1)
+		return (-1);
+	return (0);
+}
+
+/*! \file */