GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: lib/libc/rpc/bindresvport.c Lines: 0 49 0.0 %
Date: 2017-11-13 Branches: 0 28 0.0 %

Line Branch Exec Source
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/*	$OpenBSD: bindresvport.c,v 1.18 2015/09/14 11:01:47 guenther Exp $	*/
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/*
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 * Copyright 1996, Jason Downs.  All rights reserved.
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 * Copyright 1998, Theo de Raadt.  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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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */
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#include <errno.h>
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#include <string.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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/*
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 * Bind a socket to a privileged IP port
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 */
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int
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bindresvport(int sd, struct sockaddr_in *sin)
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{
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	return bindresvport_sa(sd, (struct sockaddr *)sin);
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}
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DEF_WEAK(bindresvport);
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/*
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 * Bind a socket to a privileged port for whatever protocol.
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 */
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int
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bindresvport_sa(int sd, struct sockaddr *sa)
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{
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	int old, error, af;
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	struct sockaddr_storage myaddr;
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	struct sockaddr_in *sin;
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	struct sockaddr_in6 *sin6;
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	int proto, portrange, portlow;
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	u_int16_t port;
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	socklen_t salen;
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	if (sa == NULL) {
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		salen = sizeof(myaddr);
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		sa = (struct sockaddr *)&myaddr;
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		if (getsockname(sd, sa, &salen) == -1)
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			return -1;	/* errno is correctly set */
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		af = sa->sa_family;
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		memset(&myaddr, 0, salen);
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	} else
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		af = sa->sa_family;
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	if (af == AF_INET) {
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		proto = IPPROTO_IP;
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		portrange = IP_PORTRANGE;
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		portlow = IP_PORTRANGE_LOW;
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		sin = (struct sockaddr_in *)sa;
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		salen = sizeof(struct sockaddr_in);
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		port = sin->sin_port;
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	} else if (af == AF_INET6) {
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		proto = IPPROTO_IPV6;
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		portrange = IPV6_PORTRANGE;
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		portlow = IPV6_PORTRANGE_LOW;
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		sin6 = (struct sockaddr_in6 *)sa;
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		salen = sizeof(struct sockaddr_in6);
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		port = sin6->sin6_port;
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	} else {
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		errno = EPFNOSUPPORT;
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		return (-1);
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	}
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	sa->sa_family = af;
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	sa->sa_len = salen;
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	if (port == 0) {
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		socklen_t oldlen = sizeof(old);
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		error = getsockopt(sd, proto, portrange, &old, &oldlen);
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		if (error < 0)
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			return (error);
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		error = setsockopt(sd, proto, portrange, &portlow,
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		    sizeof(portlow));
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		if (error < 0)
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			return (error);
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	}
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	error = bind(sd, sa, salen);
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	if (port == 0) {
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		int saved_errno = errno;
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		if (error) {
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			if (setsockopt(sd, proto, portrange, &old,
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			    sizeof(old)) < 0)
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				errno = saved_errno;
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			return (error);
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		}
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		if (sa != (struct sockaddr *)&myaddr) {
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			/* Hmm, what did the kernel assign... */
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			if (getsockname(sd, sa, &salen) < 0)
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				errno = saved_errno;
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			return (error);
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		}
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	}
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	return (error);
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}
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DEF_WEAK(bindresvport_sa);