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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	lib/libc/net/ethers.c	Lines:	18	101	17.8 %
Date:	2017-11-07	Branches:	9	70	12.9 %


/*	$OpenBSD: ethers.c,v 1.25 2016/09/21 04:38:56 guenther Exp $	*/

/*
 * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

/*
 * ethers(3) a la Sun.
 * Originally Written by Roland McGrath <roland@frob.com> 10/14/93.
 * Substantially modified by Todd C. Miller <Todd.Miller@courtesan.com>
 */

#include <sys/types.h>
#include <sys/socket.h>
#include <net/if.h>
#include <netinet/in.h>
#include <netinet/if_ether.h>
#include <paths.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <limits.h>
#ifdef YP
#include <rpcsvc/ypclnt.h>
#endif

#ifndef _PATH_ETHERS
#define _PATH_ETHERS	"/etc/ethers"
#endif

static char * _ether_aton(const char *, struct ether_addr *);

char *
ether_ntoa(struct ether_addr *e)
{
	static char a[] = "xx:xx:xx:xx:xx:xx";

	(void)snprintf(a, sizeof a, "%02x:%02x:%02x:%02x:%02x:%02x",
	    e->ether_addr_octet[0], e->ether_addr_octet[1],
	    e->ether_addr_octet[2], e->ether_addr_octet[3],
	    e->ether_addr_octet[4], e->ether_addr_octet[5]);

	return (a);
}

static char *
_ether_aton(const char *s, struct ether_addr *e)
{
	int i;
	long l;
	char *pp;

	while (isspace((unsigned char)*s))
		s++;

	/* expect 6 hex octets separated by ':' or space/NUL if last octet */
	for (i = 0; i < 6; i++) {
		l = strtol(s, &pp, 16);
		if (pp == s || l > 0xFF || l < 0)
			return (NULL);
		if (!(*pp == ':' ||
		    (i == 5 && (isspace((unsigned char)*pp) ||
		    *pp == '\0'))))
			return (NULL);
		e->ether_addr_octet[i] = (u_char)l;
		s = pp + 1;
	}

	/* return character after the octets ala strtol(3) */
	return (pp);
}

struct ether_addr *
ether_aton(const char *s)
{
	static struct ether_addr n;

	return (_ether_aton(s, &n) ? &n : NULL);
}

int
ether_ntohost(char *hostname, struct ether_addr *e)
{
	FILE *f;
	char buf[BUFSIZ+1], *p;
	size_t len;
	struct ether_addr try;
#ifdef YP
	char trybuf[sizeof("xx:xx:xx:xx:xx:xx")];
	int trylen;
#endif

#ifdef YP
	snprintf(trybuf, sizeof trybuf, "%x:%x:%x:%x:%x:%x",
	    e->ether_addr_octet[0], e->ether_addr_octet[1],
	    e->ether_addr_octet[2], e->ether_addr_octet[3],
	    e->ether_addr_octet[4], e->ether_addr_octet[5]);
	trylen = strlen(trybuf);
#endif

	f = fopen(_PATH_ETHERS, "re");
	if (f == NULL)
		return (-1);
	while ((p = fgetln(f, &len)) != NULL) {
		if (p[len-1] == '\n')
			len--;
		if (len > sizeof(buf) - 2)
			continue;
		(void)memcpy(buf, p, len);
		buf[len] = '\n';	/* code assumes newlines later on */
		buf[len+1] = '\0';
#ifdef YP
		/* A + in the file means try YP now.  */
		if (!strncmp(buf, "+\n", sizeof(buf))) {
			char *ypbuf, *ypdom;
			int ypbuflen;

			if (yp_get_default_domain(&ypdom))
				continue;
			if (yp_match(ypdom, "ethers.byaddr", trybuf,
			    trylen, &ypbuf, &ypbuflen))
				continue;
			if (ether_line(ypbuf, &try, hostname) == 0) {
				free(ypbuf);
				(void)fclose(f);
				return (0);
			}
			free(ypbuf);
			continue;
		}
#endif
		if (ether_line(buf, &try, hostname) == 0 &&
		    memcmp(&try, e, sizeof(try)) == 0) {
			(void)fclose(f);
			return (0);
		}
	}
	(void)fclose(f);
	errno = ENOENT;
	return (-1);
}

int
ether_hostton(const char *hostname, struct ether_addr *e)
{
	FILE *f;
	char buf[BUFSIZ+1], *p;
	char try[HOST_NAME_MAX+1];
	size_t len;
#ifdef YP
	int hostlen = strlen(hostname);
#endif

	f = fopen(_PATH_ETHERS, "re");
	if (f==NULL)
		return (-1);

	while ((p = fgetln(f, &len)) != NULL) {
		if (p[len-1] == '\n')
			len--;
		if (len > sizeof(buf) - 2)
			continue;
		memcpy(buf, p, len);
		buf[len] = '\n';	/* code assumes newlines later on */
		buf[len+1] = '\0';
#ifdef YP
		/* A + in the file means try YP now.  */
		if (!strncmp(buf, "+\n", sizeof(buf))) {
			char *ypbuf, *ypdom;
			int ypbuflen;

			if (yp_get_default_domain(&ypdom))
				continue;
			if (yp_match(ypdom, "ethers.byname", hostname, hostlen,
			    &ypbuf, &ypbuflen))
				continue;
			if (ether_line(ypbuf, e, try) == 0) {
				free(ypbuf);
				(void)fclose(f);
				return (0);
			}
			free(ypbuf);
			continue;
		}
#endif
		if (ether_line(buf, e, try) == 0 && strcmp(hostname, try) == 0) {
			(void)fclose(f);
			return (0);
		}
	}
	(void)fclose(f);
	errno = ENOENT;
	return (-1);
}

int
ether_line(const char *line, struct ether_addr *e, char *hostname)
{
	char *p;
	size_t n;

	/* Parse "xx:xx:xx:xx:xx:xx" */
	if ((p = _ether_aton(line, e)) == NULL || (*p != ' ' && *p != '\t'))
		goto bad;

	/* Now get the hostname */
	while (isspace((unsigned char)*p))
		p++;
	if (*p == '\0')
		goto bad;
	n = strcspn(p, " \t\n");
	if (n >= HOST_NAME_MAX+1)
		goto bad;
	strlcpy(hostname, p, n + 1);
	return (0);

bad:
	errno = EINVAL;
	return (-1);
}
DEF_WEAK(ether_line);


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: ethers.c,v 1.25 2016/09/21 04:38:56 guenther Exp $ */
2
3			/*
4			* Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
5			*
6			* Permission to use, copy, modify, and distribute this software for any
7			* purpose with or without fee is hereby granted, provided that the above
8			* copyright notice and this permission notice appear in all copies.
9			*
10			* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11			* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12			* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13			* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14			* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15			* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16			* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17			*/
18
19			/*
20			* ethers(3) a la Sun.
21			* Originally Written by Roland McGrath <roland@frob.com> 10/14/93.
22			* Substantially modified by Todd C. Miller <Todd.Miller@courtesan.com>
23			*/
24
25			#include <sys/types.h>
26			#include <sys/socket.h>
27			#include <net/if.h>
28			#include <netinet/in.h>
29			#include <netinet/if_ether.h>
30			#include <paths.h>
31			#include <errno.h>
32			#include <stdio.h>
33			#include <stdlib.h>
34			#include <string.h>
35			#include <ctype.h>
36			#include <limits.h>
37			#ifdef YP
38			#include <rpcsvc/ypclnt.h>
39			#endif
40
41			#ifndef _PATH_ETHERS
42			#define _PATH_ETHERS "/etc/ethers"
43			#endif
44
45			static char * _ether_aton(const char , struct ether_addr );
46
47			char *
48			ether_ntoa(struct ether_addr *e)
49			{
50			static char a[] = "xx:xx:xx:xx:xx:xx";
51
52		178	(void)snprintf(a, sizeof a, "%02x:%02x:%02x:%02x:%02x:%02x",
53		356	e->ether_addr_octet[0], e->ether_addr_octet[1],
54		178	e->ether_addr_octet[2], e->ether_addr_octet[3],
55		178	e->ether_addr_octet[4], e->ether_addr_octet[5]);
56
57		178	return (a);
58			}
59
60			static char *
61			_ether_aton(const char s, struct ether_addr e)
62			{
63			int i;
64			long l;
65		30	char *pp;
66
67	✗✓	30	while (isspace((unsigned char)*s))
68			s++;
69
70			/* expect 6 hex octets separated by ':' or space/NUL if last octet */
71	✓✓	210	for (i = 0; i < 6; i++) {
72		90	l = strtol(s, &pp, 16);
73	✗✓	90	if (pp == s \|\| l > 0xFF \|\| l < 0)
74			return (NULL);
75	✓✓✗✓	105	if (!(*pp == ':' \|\|
76	✓✗✓✗	30	(i == 5 && (isspace((unsigned char)*pp) \|\|
77		15	*pp == '\0'))))
78			return (NULL);
79		90	e->ether_addr_octet[i] = (u_char)l;
80		90	s = pp + 1;
81			}
82
83			/* return character after the octets ala strtol(3) */
84		15	return (pp);
85		15	}
86
87			struct ether_addr *
88			ether_aton(const char *s)
89			{
90			static struct ether_addr n;
91
92		30	return (_ether_aton(s, &n) ? &n : NULL);
93			}
94
95			int
96			ether_ntohost(char hostname, struct ether_addr e)
97			{
98			FILE *f;
99			char buf[BUFSIZ+1], *p;
100			size_t len;
101			struct ether_addr try;
102			#ifdef YP
103			char trybuf[sizeof("xx:xx:xx:xx:xx:xx")];
104			int trylen;
105			#endif
106
107			#ifdef YP
108			snprintf(trybuf, sizeof trybuf, "%x:%x:%x:%x:%x:%x",
109			e->ether_addr_octet[0], e->ether_addr_octet[1],
110			e->ether_addr_octet[2], e->ether_addr_octet[3],
111			e->ether_addr_octet[4], e->ether_addr_octet[5]);
112			trylen = strlen(trybuf);
113			#endif
114
115			f = fopen(_PATH_ETHERS, "re");
116			if (f == NULL)
117			return (-1);
118			while ((p = fgetln(f, &len)) != NULL) {
119			if (p[len-1] == '\n')
120			len--;
121			if (len > sizeof(buf) - 2)
122			continue;
123			(void)memcpy(buf, p, len);
124			buf[len] = '\n'; /* code assumes newlines later on */
125			buf[len+1] = '\0';
126			#ifdef YP
127			/* A + in the file means try YP now. */
128			if (!strncmp(buf, "+\n", sizeof(buf))) {
129			char ypbuf, ypdom;
130			int ypbuflen;
131
132			if (yp_get_default_domain(&ypdom))
133			continue;
134			if (yp_match(ypdom, "ethers.byaddr", trybuf,
135			trylen, &ypbuf, &ypbuflen))
136			continue;
137			if (ether_line(ypbuf, &try, hostname) == 0) {
138			free(ypbuf);
139			(void)fclose(f);
140			return (0);
141			}
142			free(ypbuf);
143			continue;
144			}
145			#endif
146			if (ether_line(buf, &try, hostname) == 0 &&
147			memcmp(&try, e, sizeof(try)) == 0) {
148			(void)fclose(f);
149			return (0);
150			}
151			}
152			(void)fclose(f);
153			errno = ENOENT;
154			return (-1);
155			}
156
157			int
158			ether_hostton(const char hostname, struct ether_addr e)
159			{
160			FILE *f;
161			char buf[BUFSIZ+1], *p;
162			char try[HOST_NAME_MAX+1];
163			size_t len;
164			#ifdef YP
165			int hostlen = strlen(hostname);
166			#endif
167
168			f = fopen(_PATH_ETHERS, "re");
169			if (f==NULL)
170			return (-1);
171
172			while ((p = fgetln(f, &len)) != NULL) {
173			if (p[len-1] == '\n')
174			len--;
175			if (len > sizeof(buf) - 2)
176			continue;
177			memcpy(buf, p, len);
178			buf[len] = '\n'; /* code assumes newlines later on */
179			buf[len+1] = '\0';
180			#ifdef YP
181			/* A + in the file means try YP now. */
182			if (!strncmp(buf, "+\n", sizeof(buf))) {
183			char ypbuf, ypdom;
184			int ypbuflen;
185
186			if (yp_get_default_domain(&ypdom))
187			continue;
188			if (yp_match(ypdom, "ethers.byname", hostname, hostlen,
189			&ypbuf, &ypbuflen))
190			continue;
191			if (ether_line(ypbuf, e, try) == 0) {
192			free(ypbuf);
193			(void)fclose(f);
194			return (0);
195			}
196			free(ypbuf);
197			continue;
198			}
199			#endif
200			if (ether_line(buf, e, try) == 0 && strcmp(hostname, try) == 0) {
201			(void)fclose(f);
202			return (0);
203			}
204			}
205			(void)fclose(f);
206			errno = ENOENT;
207			return (-1);
208			}
209
210			int
211			ether_line(const char line, struct ether_addr e, char *hostname)
212			{
213			char *p;
214			size_t n;
215
216			/* Parse "xx:xx:xx:xx:xx:xx" */
217			if ((p = _ether_aton(line, e)) == NULL \|\| (p != ' ' && p != '\t'))
218			goto bad;
219
220			/* Now get the hostname */
221			while (isspace((unsigned char)*p))
222			p++;
223			if (*p == '\0')
224			goto bad;
225			n = strcspn(p, " \t\n");
226			if (n >= HOST_NAME_MAX+1)
227			goto bad;
228			strlcpy(hostname, p, n + 1);
229			return (0);
230
231			bad:
232			errno = EINVAL;
233			return (-1);
234			}
235			DEF_WEAK(ether_line);