GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: usr.bin/ssh/lib/../canohost.c Lines: 0 55 0.0 %
Date: 2017-11-13 Branches: 0 32 0.0 %

Line Branch Exec Source
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/* $OpenBSD: canohost.c,v 1.73 2016/03/07 19:02:43 djm Exp $ */
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/*
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 * Author: Tatu Ylonen <ylo@cs.hut.fi>
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 * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
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 *                    All rights reserved
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 * Functions for returning the canonical host name of the remote site.
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 *
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 * As far as I am concerned, the code I have written for this software
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 * can be used freely for any purpose.  Any derived versions of this
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 * software must be clearly marked as such, and if the derived work is
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 * incompatible with the protocol description in the RFC file, it must be
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 * called by a name other than "ssh" or "Secure Shell".
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 */
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <sys/un.h>
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#include <netinet/in.h>
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#include <errno.h>
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#include <netdb.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdarg.h>
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#include <unistd.h>
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#include "xmalloc.h"
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#include "packet.h"
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#include "log.h"
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#include "canohost.h"
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#include "misc.h"
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/*
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 * Returns the local/remote IP-address/hostname of socket as a string.
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 * The returned string must be freed.
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 */
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static char *
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get_socket_address(int sock, int remote, int flags)
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{
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	struct sockaddr_storage addr;
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	socklen_t addrlen;
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	char ntop[NI_MAXHOST];
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	int r;
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	/* Get IP address of client. */
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	addrlen = sizeof(addr);
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	memset(&addr, 0, sizeof(addr));
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	if (remote) {
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		if (getpeername(sock, (struct sockaddr *)&addr, &addrlen) != 0)
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			return NULL;
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	} else {
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		if (getsockname(sock, (struct sockaddr *)&addr, &addrlen) != 0)
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			return NULL;
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	}
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	switch (addr.ss_family) {
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	case AF_INET:
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	case AF_INET6:
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		/* Get the address in ascii. */
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		if ((r = getnameinfo((struct sockaddr *)&addr, addrlen, ntop,
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		    sizeof(ntop), NULL, 0, flags)) != 0) {
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			error("%s: getnameinfo %d failed: %s", __func__,
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			    flags, ssh_gai_strerror(r));
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			return NULL;
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		}
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		return xstrdup(ntop);
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	case AF_UNIX:
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		/* Get the Unix domain socket path. */
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		return xstrdup(((struct sockaddr_un *)&addr)->sun_path);
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	default:
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		/* We can't look up remote Unix domain sockets. */
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		return NULL;
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	}
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}
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char *
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get_peer_ipaddr(int sock)
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{
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	char *p;
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	if ((p = get_socket_address(sock, 1, NI_NUMERICHOST)) != NULL)
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		return p;
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	return xstrdup("UNKNOWN");
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}
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char *
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get_local_ipaddr(int sock)
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{
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	char *p;
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	if ((p = get_socket_address(sock, 0, NI_NUMERICHOST)) != NULL)
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		return p;
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	return xstrdup("UNKNOWN");
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}
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char *
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get_local_name(int fd)
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{
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	char *host, myname[NI_MAXHOST];
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	/* Assume we were passed a socket */
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	if ((host = get_socket_address(fd, 0, NI_NAMEREQD)) != NULL)
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		return host;
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	/* Handle the case where we were passed a pipe */
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	if (gethostname(myname, sizeof(myname)) == -1) {
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		verbose("%s: gethostname: %s", __func__, strerror(errno));
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		host = xstrdup("UNKNOWN");
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	} else {
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		host = xstrdup(myname);
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	}
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	return host;
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}
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/* Returns the local/remote port for the socket. */
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static int
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get_sock_port(int sock, int local)
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{
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	struct sockaddr_storage from;
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	socklen_t fromlen;
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	char strport[NI_MAXSERV];
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	int r;
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	/* Get IP address of client. */
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	fromlen = sizeof(from);
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	memset(&from, 0, sizeof(from));
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	if (local) {
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		if (getsockname(sock, (struct sockaddr *)&from, &fromlen) < 0) {
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			error("getsockname failed: %.100s", strerror(errno));
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			return 0;
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		}
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	} else {
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		if (getpeername(sock, (struct sockaddr *)&from, &fromlen) < 0) {
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			debug("getpeername failed: %.100s", strerror(errno));
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			return -1;
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		}
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	}
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	/* Non-inet sockets don't have a port number. */
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	if (from.ss_family != AF_INET && from.ss_family != AF_INET6)
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		return 0;
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	/* Return port number. */
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	if ((r = getnameinfo((struct sockaddr *)&from, fromlen, NULL, 0,
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	    strport, sizeof(strport), NI_NUMERICSERV)) != 0)
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		fatal("%s: getnameinfo NI_NUMERICSERV failed: %s", __func__,
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		    ssh_gai_strerror(r));
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	return atoi(strport);
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}
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int
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get_peer_port(int sock)
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{
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	return get_sock_port(sock, 0);
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}
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int
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get_local_port(int sock)
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{
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	return get_sock_port(sock, 1);
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}