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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	usr.bin/ssh/lib/../canohost.c	Lines:	34	59	57.6 %
Date:	2017-11-07	Branches:	14	32	43.8 %


/* $OpenBSD: canohost.c,v 1.73 2016/03/07 19:02:43 djm Exp $ */
/*
 * Author: Tatu Ylonen <ylo@cs.hut.fi>
 * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
 *                    All rights reserved
 * Functions for returning the canonical host name of the remote site.
 *
 * As far as I am concerned, the code I have written for this software
 * can be used freely for any purpose.  Any derived versions of this
 * software must be clearly marked as such, and if the derived work is
 * incompatible with the protocol description in the RFC file, it must be
 * called by a name other than "ssh" or "Secure Shell".
 */

#include <sys/types.h>
#include <sys/socket.h>
#include <sys/un.h>

#include <netinet/in.h>

#include <errno.h>
#include <netdb.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdarg.h>
#include <unistd.h>

#include "xmalloc.h"
#include "packet.h"
#include "log.h"
#include "canohost.h"
#include "misc.h"

/*
 * Returns the local/remote IP-address/hostname of socket as a string.
 * The returned string must be freed.
 */
static char *
get_socket_address(int sock, int remote, int flags)
{
	struct sockaddr_storage addr;
	socklen_t addrlen;
	char ntop[NI_MAXHOST];
	int r;

	/* Get IP address of client. */
	addrlen = sizeof(addr);
	memset(&addr, 0, sizeof(addr));

	if (remote) {
		if (getpeername(sock, (struct sockaddr *)&addr, &addrlen) != 0)
			return NULL;
	} else {
		if (getsockname(sock, (struct sockaddr *)&addr, &addrlen) != 0)
			return NULL;
	}

	switch (addr.ss_family) {
	case AF_INET:
	case AF_INET6:
		/* Get the address in ascii. */
		if ((r = getnameinfo((struct sockaddr *)&addr, addrlen, ntop,
		    sizeof(ntop), NULL, 0, flags)) != 0) {
			error("%s: getnameinfo %d failed: %s", __func__,
			    flags, ssh_gai_strerror(r));
			return NULL;
		}
		return xstrdup(ntop);
	case AF_UNIX:
		/* Get the Unix domain socket path. */
		return xstrdup(((struct sockaddr_un *)&addr)->sun_path);
	default:
		/* We can't look up remote Unix domain sockets. */
		return NULL;
	}
}

char *
get_peer_ipaddr(int sock)
{
	char *p;

	if ((p = get_socket_address(sock, 1, NI_NUMERICHOST)) != NULL)
		return p;
	return xstrdup("UNKNOWN");
}

char *
get_local_ipaddr(int sock)
{
	char *p;

	if ((p = get_socket_address(sock, 0, NI_NUMERICHOST)) != NULL)
		return p;
	return xstrdup("UNKNOWN");
}

char *
get_local_name(int fd)
{
	char *host, myname[NI_MAXHOST];

	/* Assume we were passed a socket */
	if ((host = get_socket_address(fd, 0, NI_NAMEREQD)) != NULL)
		return host;

	/* Handle the case where we were passed a pipe */
	if (gethostname(myname, sizeof(myname)) == -1) {
		verbose("%s: gethostname: %s", __func__, strerror(errno));
		host = xstrdup("UNKNOWN");
	} else {
		host = xstrdup(myname);
	}

	return host;
}

/* Returns the local/remote port for the socket. */

static int
get_sock_port(int sock, int local)
{
	struct sockaddr_storage from;
	socklen_t fromlen;
	char strport[NI_MAXSERV];
	int r;

	/* Get IP address of client. */
	fromlen = sizeof(from);
	memset(&from, 0, sizeof(from));
	if (local) {
		if (getsockname(sock, (struct sockaddr *)&from, &fromlen) < 0) {
			error("getsockname failed: %.100s", strerror(errno));
			return 0;
		}
	} else {
		if (getpeername(sock, (struct sockaddr *)&from, &fromlen) < 0) {
			debug("getpeername failed: %.100s", strerror(errno));
			return -1;
		}
	}

	/* Non-inet sockets don't have a port number. */
	if (from.ss_family != AF_INET && from.ss_family != AF_INET6)
		return 0;

	/* Return port number. */
	if ((r = getnameinfo((struct sockaddr *)&from, fromlen, NULL, 0,
	    strport, sizeof(strport), NI_NUMERICSERV)) != 0)
		fatal("%s: getnameinfo NI_NUMERICSERV failed: %s", __func__,
		    ssh_gai_strerror(r));
	return atoi(strport);
}

int
get_peer_port(int sock)
{
	return get_sock_port(sock, 0);
}

int
get_local_port(int sock)
{
	return get_sock_port(sock, 1);
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: canohost.c,v 1.73 2016/03/07 19:02:43 djm Exp $ */
2			/*
3			* Author: Tatu Ylonen <ylo@cs.hut.fi>
4			* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
5			* All rights reserved
6			* Functions for returning the canonical host name of the remote site.
7			*
8			* As far as I am concerned, the code I have written for this software
9			* can be used freely for any purpose. Any derived versions of this
10			* software must be clearly marked as such, and if the derived work is
11			* incompatible with the protocol description in the RFC file, it must be
12			* called by a name other than "ssh" or "Secure Shell".
13			*/
14
15			#include <sys/types.h>
16			#include <sys/socket.h>
17			#include <sys/un.h>
18
19			#include <netinet/in.h>
20
21			#include <errno.h>
22			#include <netdb.h>
23			#include <stdio.h>
24			#include <stdlib.h>
25			#include <string.h>
26			#include <stdarg.h>
27			#include <unistd.h>
28
29			#include "xmalloc.h"
30			#include "packet.h"
31			#include "log.h"
32			#include "canohost.h"
33			#include "misc.h"
34
35			/*
36			* Returns the local/remote IP-address/hostname of socket as a string.
37			* The returned string must be freed.
38			*/
39			static char *
40			get_socket_address(int sock, int remote, int flags)
41			{
42		4	struct sockaddr_storage addr;
43		2	socklen_t addrlen;
44		2	char ntop[NI_MAXHOST];
45			int r;
46
47			/* Get IP address of client. */
48		2	addrlen = sizeof(addr);
49		2	memset(&addr, 0, sizeof(addr));
50
51	✓✓	2	if (remote) {
52	✗✓	1	if (getpeername(sock, (struct sockaddr *)&addr, &addrlen) != 0)
53			return NULL;
54			} else {
55	✗✓	1	if (getsockname(sock, (struct sockaddr *)&addr, &addrlen) != 0)
56			return NULL;
57			}
58
59	✗✓✗✗	2	switch (addr.ss_family) {
60			case AF_INET:
61			case AF_INET6:
62			/* Get the address in ascii. */
63	✗✓	4	if ((r = getnameinfo((struct sockaddr *)&addr, addrlen, ntop,
64		2	sizeof(ntop), NULL, 0, flags)) != 0) {
65			error("%s: getnameinfo %d failed: %s", __func__,
66			flags, ssh_gai_strerror(r));
67			return NULL;
68			}
69		2	return xstrdup(ntop);
70			case AF_UNIX:
71			/* Get the Unix domain socket path. */
72			return xstrdup(((struct sockaddr_un *)&addr)->sun_path);
73			default:
74			/* We can't look up remote Unix domain sockets. */
75			return NULL;
76			}
77		2	}
78
79			char *
80			get_peer_ipaddr(int sock)
81			{
82			char *p;
83
84	✓✗	2	if ((p = get_socket_address(sock, 1, NI_NUMERICHOST)) != NULL)
85		1	return p;
86			return xstrdup("UNKNOWN");
87		1	}
88
89			char *
90			get_local_ipaddr(int sock)
91			{
92			char *p;
93
94	✓✗	2	if ((p = get_socket_address(sock, 0, NI_NUMERICHOST)) != NULL)
95		1	return p;
96			return xstrdup("UNKNOWN");
97		1	}
98
99			char *
100			get_local_name(int fd)
101			{
102			char *host, myname[NI_MAXHOST];
103
104			/* Assume we were passed a socket */
105			if ((host = get_socket_address(fd, 0, NI_NAMEREQD)) != NULL)
106			return host;
107
108			/* Handle the case where we were passed a pipe */
109			if (gethostname(myname, sizeof(myname)) == -1) {
110			verbose("%s: gethostname: %s", __func__, strerror(errno));
111			host = xstrdup("UNKNOWN");
112			} else {
113			host = xstrdup(myname);
114			}
115
116			return host;
117			}
118
119			/* Returns the local/remote port for the socket. */
120
121			static int
122			get_sock_port(int sock, int local)
123			{
124		4	struct sockaddr_storage from;
125		2	socklen_t fromlen;
126		2	char strport[NI_MAXSERV];
127			int r;
128
129			/* Get IP address of client. */
130		2	fromlen = sizeof(from);
131		2	memset(&from, 0, sizeof(from));
132	✓✓	2	if (local) {
133	✗✓	1	if (getsockname(sock, (struct sockaddr *)&from, &fromlen) < 0) {
134			error("getsockname failed: %.100s", strerror(errno));
135			return 0;
136			}
137			} else {
138	✗✓	1	if (getpeername(sock, (struct sockaddr *)&from, &fromlen) < 0) {
139			debug("getpeername failed: %.100s", strerror(errno));
140			return -1;
141			}
142			}
143
144			/* Non-inet sockets don't have a port number. */
145	✗✓✗✗	2	if (from.ss_family != AF_INET && from.ss_family != AF_INET6)
146			return 0;
147
148			/* Return port number. */
149	✗✓	6	if ((r = getnameinfo((struct sockaddr *)&from, fromlen, NULL, 0,
150		4	strport, sizeof(strport), NI_NUMERICSERV)) != 0)
151			fatal("%s: getnameinfo NI_NUMERICSERV failed: %s", __func__,
152			ssh_gai_strerror(r));
153		2	return atoi(strport);
154		2	}
155
156			int
157			get_peer_port(int sock)
158			{
159		2	return get_sock_port(sock, 0);
160			}
161
162			int
163			get_local_port(int sock)
164			{
165		2	return get_sock_port(sock, 1);
166			}