cap_dns.h

/*-
 * Copyright (c) 2012 The FreeBSD Foundation
 *
 * This software was developed by Pawel Jakub Dawidek under sponsorship from
 * the FreeBSD Foundation.
 *
 * 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS 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 AUTHORS 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.
 */

#ifndef	_CAP_DNS_H_
#define	_CAP_DNS_H_

#ifdef HAVE_CASPER
#define WITH_CASPER
#endif

#include <sys/cdefs.h>
#include <sys/socket.h>	/* socklen_t */

/*
 * Pull these in if we're just inlining calls to the underlying
 * libc functions.
 */
#ifndef	WITH_CASPER
#include <sys/types.h>
#include <netdb.h>
#endif	/* WITH_CASPER */

struct addrinfo;
struct hostent;

#ifdef WITH_CASPER
__BEGIN_DECLS

struct hostent *cap_gethostbyname(cap_channel_t *chan, const char *name);
struct hostent *cap_gethostbyname2(cap_channel_t *chan, const char *name,
    int type);
struct hostent *cap_gethostbyaddr(cap_channel_t *chan, const void *addr,
    socklen_t len, int type);

int cap_getaddrinfo(cap_channel_t *chan, const char *hostname,
    const char *servname, const struct addrinfo *hints, struct addrinfo **res);
int cap_getnameinfo(cap_channel_t *chan, const struct sockaddr *sa,
    socklen_t salen, char *host, size_t hostlen, char *serv, size_t servlen,
    int flags);

int cap_dns_type_limit(cap_channel_t *chan, const char * const *types,
    size_t ntypes);
int cap_dns_family_limit(cap_channel_t *chan, const int *families,
    size_t nfamilies);

__END_DECLS
#else

static inline struct hostent *
cap_gethostbyname(cap_channel_t *chan __unused, const char *name)
{

	return (gethostbyname(name));
}

static inline struct hostent *
cap_gethostbyname2(cap_channel_t *chan __unused, const char *name, int type)
{

	return (gethostbyname2(name, type));
}

static inline struct hostent *
cap_gethostbyaddr(cap_channel_t *chan __unused, const void *addr,
    socklen_t len, int type)
{

	return (gethostbyaddr(addr, len, type));
}

static inline int cap_getaddrinfo(cap_channel_t *chan __unused,
    const char *hostname, const char *servname, const struct addrinfo *hints,
    struct addrinfo **res)
{

	return (getaddrinfo(hostname, servname, hints, res));
}

static inline int cap_getnameinfo(cap_channel_t *chan __unused,
    const struct sockaddr *sa, socklen_t salen, char *host, size_t hostlen,
    char *serv, size_t servlen, int flags)
{

	return (getnameinfo(sa, salen, host, hostlen, serv, servlen, flags));
}

static inline int
cap_dns_type_limit(cap_channel_t *chan __unused,
    const char * const *types __unused,
    size_t ntypes __unused)
{

	return (0);
}

static inline int
cap_dns_family_limit(cap_channel_t *chan __unused,
    const int *families __unused,
    size_t nfamilies __unused)
{

	return (0);
}
#endif	/* WITH_CASPER */

#endif	/* !_CAP_DNS_H_ */