444 lines
12 KiB
C
444 lines
12 KiB
C
/*
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* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the project nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* Copyright (c) 1982, 1986, 1990, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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/*
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* Compatability shims with the rfc2553 API to simplify ntp.
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*/
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#include <config.h>
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#include <sys/types.h>
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#include <ctype.h>
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#include <sys/socket.h>
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#include <isc/net.h>
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#ifdef HAVE_NETINET_IN_H
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#include <netinet/in.h>
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#endif
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#include "ntp_rfc2553.h"
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#include "ntpd.h"
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#include "ntp_malloc.h"
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#include "ntp_stdlib.h"
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#include "ntp_string.h"
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#ifndef ISC_PLATFORM_HAVEIPV6
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static char *ai_errlist[] = {
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"Success",
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"Address family for hostname not supported", /* EAI_ADDRFAMILY */
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"Temporary failure in name resolution", /* EAI_AGAIN */
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"Invalid value for ai_flags", /* EAI_BADFLAGS */
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"Non-recoverable failure in name resolution", /* EAI_FAIL */
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"ai_family not supported", /* EAI_FAMILY */
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"Memory allocation failure", /* EAI_MEMORY */
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"No address associated with hostname", /* EAI_NODATA */
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"hostname nor servname provided, or not known", /* EAI_NONAME */
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"servname not supported for ai_socktype", /* EAI_SERVICE */
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"ai_socktype not supported", /* EAI_SOCKTYPE */
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"System error returned in errno", /* EAI_SYSTEM */
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"Invalid value for hints", /* EAI_BADHINTS */
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"Resolved protocol is unknown", /* EAI_PROTOCOL */
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"Unknown error", /* EAI_MAX */
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};
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/*
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* Local declaration
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*/
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int
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DNSlookup_name(
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const char *name,
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int ai_family,
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struct hostent **Addresses
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);
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#ifndef SYS_WINNT
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/*
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* Encapsulate gethostbyname to control the error code
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*/
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int
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DNSlookup_name(
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const char *name,
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int ai_family,
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struct hostent **Addresses
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)
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{
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*Addresses = gethostbyname(name);
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return (h_errno);
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}
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#endif
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static int do_nodename P((const char *nodename, struct addrinfo *ai,
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const struct addrinfo *hints));
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int
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getaddrinfo (const char *nodename, const char *servname,
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const struct addrinfo *hints, struct addrinfo **res)
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{
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int rval;
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struct servent *sp;
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struct addrinfo *ai = NULL;
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int port;
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const char *proto = NULL;
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int family, socktype, flags, protocol;
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/*
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* If no name is provide just return an error
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*/
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if (nodename == NULL && servname == NULL)
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return (EAI_NONAME);
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ai = calloc(sizeof(struct addrinfo), 1);
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if (ai == NULL)
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return (EAI_MEMORY);
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/*
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* Copy default values from hints, if available
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*/
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if (hints != NULL) {
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ai->ai_flags = hints->ai_flags;
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ai->ai_family = hints->ai_family;
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ai->ai_socktype = hints->ai_socktype;
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ai->ai_protocol = hints->ai_protocol;
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family = hints->ai_family;
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socktype = hints->ai_socktype;
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protocol = hints->ai_protocol;
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flags = hints->ai_flags;
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switch (family) {
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case AF_UNSPEC:
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switch (hints->ai_socktype) {
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case SOCK_STREAM:
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proto = "tcp";
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break;
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case SOCK_DGRAM:
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proto = "udp";
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break;
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}
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break;
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case AF_INET:
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case AF_INET6:
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switch (hints->ai_socktype) {
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case 0:
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break;
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case SOCK_STREAM:
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proto = "tcp";
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break;
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case SOCK_DGRAM:
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proto = "udp";
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break;
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case SOCK_RAW:
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break;
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default:
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return (EAI_SOCKTYPE);
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}
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break;
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#ifdef AF_LOCAL
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case AF_LOCAL:
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switch (hints->ai_socktype) {
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case 0:
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break;
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case SOCK_STREAM:
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break;
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case SOCK_DGRAM:
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break;
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default:
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return (EAI_SOCKTYPE);
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}
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break;
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#endif
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default:
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return (EAI_FAMILY);
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}
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} else {
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protocol = 0;
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family = 0;
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socktype = 0;
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flags = 0;
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}
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rval = do_nodename(nodename, ai, hints);
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if (rval != 0) {
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freeaddrinfo(ai);
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return (rval);
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}
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/*
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* First, look up the service name (port) if it was
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* requested. If the socket type wasn't specified, then
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* try and figure it out.
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*/
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if (servname != NULL) {
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char *e;
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port = strtol(servname, &e, 10);
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if (*e == '\0') {
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if (socktype == 0)
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return (EAI_SOCKTYPE);
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if (port < 0 || port > 65535)
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return (EAI_SERVICE);
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port = htons((unsigned short) port);
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} else {
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sp = getservbyname(servname, proto);
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if (sp == NULL)
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return (EAI_SERVICE);
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port = sp->s_port;
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if (socktype == 0) {
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if (strcmp(sp->s_proto, "tcp") == 0)
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socktype = SOCK_STREAM;
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else if (strcmp(sp->s_proto, "udp") == 0)
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socktype = SOCK_DGRAM;
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}
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}
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} else
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port = 0;
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/*
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*
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* Set up the port number
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*/
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if (ai->ai_family == AF_INET)
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((struct sockaddr_in *)ai->ai_addr)->sin_port = (unsigned short) port;
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else if (ai->ai_family == AF_INET6)
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((struct sockaddr_in6 *)ai->ai_addr)->sin6_port = (unsigned short) port;
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*res = ai;
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return (0);
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}
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void
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freeaddrinfo(struct addrinfo *ai)
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{
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if (ai->ai_canonname != NULL)
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{
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free(ai->ai_canonname);
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ai->ai_canonname = NULL;
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}
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if (ai->ai_addr != NULL)
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{
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free(ai->ai_addr);
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ai->ai_addr = NULL;
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}
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free(ai);
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ai = NULL;
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}
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int
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getnameinfo (const struct sockaddr *sa, u_int salen, char *host,
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size_t hostlen, char *serv, size_t servlen, int flags)
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{
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struct hostent *hp;
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int namelen;
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if (sa->sa_family != AF_INET)
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return (EAI_FAMILY);
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hp = gethostbyaddr(
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(const char *)&((const struct sockaddr_in *)sa)->sin_addr,
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4, AF_INET);
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if (hp == NULL) {
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if (h_errno == TRY_AGAIN)
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return (EAI_AGAIN);
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else
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return (EAI_FAIL);
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}
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if (host != NULL && hostlen > 0) {
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/*
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* Don't exceed buffer
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*/
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namelen = min(strlen(hp->h_name), hostlen - 1);
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if (namelen > 0) {
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strncpy(host, hp->h_name, namelen);
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host[namelen] = '\0';
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}
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}
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return (0);
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}
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char *
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gai_strerror(int ecode)
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{
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if (ecode < 0 || ecode > EAI_MAX)
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ecode = EAI_MAX;
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return ai_errlist[ecode];
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}
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static int
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do_nodename(
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const char *nodename,
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struct addrinfo *ai,
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const struct addrinfo *hints)
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{
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struct hostent *hp = NULL;
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struct sockaddr_in *sockin;
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struct sockaddr_in6 *sockin6;
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int errval;
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ai->ai_addr = calloc(sizeof(struct sockaddr_storage), 1);
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if (ai->ai_addr == NULL)
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return (EAI_MEMORY);
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/*
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* For an empty node name just use the wildcard.
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* NOTE: We need to assume that the address family is
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* set elsewhere so that we can set the appropriate wildcard
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*/
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if (nodename == NULL) {
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ai->ai_addrlen = sizeof(struct sockaddr_storage);
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if (ai->ai_family == AF_INET)
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{
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sockin = (struct sockaddr_in *)ai->ai_addr;
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sockin->sin_family = (short) ai->ai_family;
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sockin->sin_addr.s_addr = htonl(INADDR_ANY);
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}
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else
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{
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sockin6 = (struct sockaddr_in6 *)ai->ai_addr;
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sockin6->sin6_family = (short) ai->ai_family;
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/*
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* we have already zeroed out the address
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* so we don't actually need to do this
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* This assignment is causing problems so
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* we don't do what this would do.
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sockin6->sin6_addr = in6addr_any;
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*/
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}
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#ifdef HAVE_SA_LEN_IN_STRUCT_SOCKADDR
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ai->ai_addr->sa_len = SOCKLEN(ai->ai_addr);
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#endif
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return (0);
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}
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/*
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* See if we have an IPv6 address
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*/
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if(strchr(nodename, ':') != NULL) {
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if (inet_pton(AF_INET6, nodename,
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&((struct sockaddr_in6 *)ai->ai_addr)->sin6_addr) == 1) {
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((struct sockaddr_in6 *)ai->ai_addr)->sin6_family = AF_INET6;
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ai->ai_family = AF_INET6;
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ai->ai_addrlen = sizeof(struct sockaddr_in6);
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return (0);
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}
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}
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/*
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* See if we have an IPv4 address
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*/
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if (inet_pton(AF_INET, nodename,
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&((struct sockaddr_in *)ai->ai_addr)->sin_addr) == 1) {
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((struct sockaddr *)ai->ai_addr)->sa_family = AF_INET;
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ai->ai_family = AF_INET;
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ai->ai_addrlen = sizeof(struct sockaddr_in);
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return (0);
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}
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/*
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* If the numeric host flag is set, don't attempt resolution
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*/
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if (hints != NULL && (hints->ai_flags & AI_NUMERICHOST))
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return (EAI_NONAME);
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/*
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* Look for a name
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*/
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errval = DNSlookup_name(nodename, AF_INET, &hp);
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if (hp == NULL) {
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if (errval == TRY_AGAIN || errval == EAI_AGAIN)
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return (EAI_AGAIN);
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else if (errval == EAI_NONAME) {
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if (inet_pton(AF_INET, nodename,
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&((struct sockaddr_in *)ai->ai_addr)->sin_addr) == 1) {
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((struct sockaddr *)ai->ai_addr)->sa_family = AF_INET;
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ai->ai_family = AF_INET;
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ai->ai_addrlen = sizeof(struct sockaddr_in);
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return (0);
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}
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return (errval);
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}
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else
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{
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return (errval);
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}
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}
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ai->ai_family = hp->h_addrtype;
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ai->ai_addrlen = sizeof(struct sockaddr);
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sockin = (struct sockaddr_in *)ai->ai_addr;
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memcpy(&sockin->sin_addr, hp->h_addr, hp->h_length);
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ai->ai_addr->sa_family = hp->h_addrtype;
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#ifdef HAVE_SA_LEN_IN_STRUCT_SOCKADDR
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ai->ai_addr->sa_len = sizeof(struct sockaddr);
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#endif
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if (hints != NULL && hints->ai_flags & AI_CANONNAME) {
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ai->ai_canonname = malloc(strlen(hp->h_name) + 1);
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if (ai->ai_canonname == NULL)
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return (EAI_MEMORY);
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strcpy(ai->ai_canonname, hp->h_name);
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}
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return (0);
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}
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#endif /* !ISC_PLATFORM_HAVEIPV6 */
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