Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	lib/libpcap/inet.c	Lines:	0	66	0.0 %
Date:	2017-11-13	Branches:	0	34	0.0 %


/*	$OpenBSD: inet.c,v 1.24 2015/12/22 19:51:04 mmcc Exp $	*/

/*
 * Copyright (c) 1994, 1995, 1996, 1997, 1998
 *	The Regents of the University of California.  All rights reserved.
 *
 * 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.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the Computer Systems
 *	Engineering Group at Lawrence Berkeley Laboratory.
 * 4. Neither the name of the University nor of the Laboratory may be used
 *    to endorse or promote products derived from this software without
 *    specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
 */


#include <sys/file.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#ifdef HAVE_SYS_SOCKIO_H
#include <sys/sockio.h>
#endif
#include <sys/time.h>				/* concession to AIX */

struct mbuf;
struct rtentry;

#include <net/if.h>
#include <netinet/in.h>

#include <ctype.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#ifdef HAVE_IFADDRS_H
#include <ifaddrs.h>
#endif

#include "pcap-int.h"

#ifdef HAVE_OS_PROTO_H
#include "os-proto.h"
#endif

/*
 * Free a list of interfaces.
 */
void
pcap_freealldevs(pcap_if_t *alldevs)
{
	pcap_if_t *curdev, *nextdev;
	pcap_addr_t *curaddr, *nextaddr;

	for (curdev = alldevs; curdev != NULL; curdev = nextdev) {
		nextdev = curdev->next;

		/*
		 * Free all addresses.
		 */
		for (curaddr = curdev->addresses; curaddr != NULL;
		    curaddr = nextaddr) {
			nextaddr = curaddr->next;
			free(curaddr->addr);
			free(curaddr->netmask);
			free(curaddr->broadaddr);
			free(curaddr->dstaddr);
			free(curaddr);
		}

		/*
		 * Free the name string.
		 */
		free(curdev->name);

		/*
		 * Free the description string, if any.
		 */
		free(curdev->description);

		/*
		 * Free the interface.
		 */
		free(curdev);
	}
}

/*
 * Return the name of a network interface attached to the system, or NULL
 * if none can be found.  The interface must be configured up; the
 * lowest unit number is preferred; loopback is ignored.
 */
char *
pcap_lookupdev(errbuf)
	char *errbuf;
{
#ifdef HAVE_IFADDRS_H
	struct ifaddrs *ifap, *ifa, *mp;
	int n, minunit;
	char *cp;
	static char device[IF_NAMESIZE + 1];

	if (getifaddrs(&ifap) != 0) {
		(void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
		    "getifaddrs: %s", pcap_strerror(errno));
		return NULL;
	}

	mp = NULL;
	minunit = 666;
	for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
		if ((ifa->ifa_flags & IFF_UP) == 0)
			continue;
		if (ISLOOPBACK(ifa->ifa_name, ifa->ifa_flags))
			continue;
		for (cp = ifa->ifa_name; !isdigit((unsigned char)*cp); ++cp)
			continue;
		n = atoi(cp);
		if (n < minunit) {
			minunit = n;
			mp = ifa;
		}
	}
	if (mp == NULL) {
		(void)strlcpy(errbuf, "no suitable device found",
		    PCAP_ERRBUF_SIZE);
		freeifaddrs(ifap);
		return (NULL);
	}

	(void)strlcpy(device, mp->ifa_name, sizeof(device));
	freeifaddrs(ifap);
	return (device);
#else
	int fd, minunit, n;
	char *cp;
	struct ifreq *ifrp, *ifend, *ifnext, *mp;
	struct ifconf ifc;
	struct ifreq ibuf[16], ifr;
	static char device[sizeof(ifrp->ifr_name) + 1];

	fd = socket(AF_INET, SOCK_DGRAM, 0);
	if (fd < 0) {
		(void)snprintf(errbuf, PCAP_ERRBUF_SIZE, "socket: %s",
		    pcap_strerror(errno));
		return (NULL);
	}
	ifc.ifc_len = sizeof ibuf;
	ifc.ifc_buf = (caddr_t)ibuf;

	memset((char *)ibuf, 0, sizeof(ibuf));
	if (ioctl(fd, SIOCGIFCONF, (char *)&ifc) < 0 ||
	    ifc.ifc_len < sizeof(struct ifreq)) {
		(void)snprintf(errbuf, PCAP_ERRBUF_SIZE, "SIOCGIFCONF: %s",
		    pcap_strerror(errno));
		(void)close(fd);
		return (NULL);
	}
	ifrp = ibuf;
	ifend = (struct ifreq *)((char *)ibuf + ifc.ifc_len);

	mp = NULL;
	minunit = 666;
	for (; ifrp < ifend; ifrp = ifnext) {
#ifdef HAVE_SOCKADDR_SA_LEN
		n = ifrp->ifr_addr.sa_len + sizeof(ifrp->ifr_name);
		if (n < sizeof(*ifrp))
			ifnext = ifrp + 1;
		else
			ifnext = (struct ifreq *)((char *)ifrp + n);
		if (ifrp->ifr_addr.sa_family != AF_INET)
			continue;
#else
		ifnext = ifrp + 1;
#endif
		/*
		 * Need a template to preserve address info that is
		 * used below to locate the next entry.  (Otherwise,
		 * SIOCGIFFLAGS stomps over it because the requests
		 * are returned in a union.)
		 */
		(void)strlcpy(ifr.ifr_name, ifrp->ifr_name,
		    sizeof(ifr.ifr_name));
		if (ioctl(fd, SIOCGIFFLAGS, (char *)&ifr) < 0) {
			if (errno == ENXIO)
				continue;
			(void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
			    "SIOCGIFFLAGS: %.*s: %s",
			    (int)sizeof(ifr.ifr_name), ifr.ifr_name,
			    pcap_strerror(errno));
			(void)close(fd);
			return (NULL);
		}

		/* Must be up and not the loopback */
		if ((ifr.ifr_flags & IFF_UP) == 0 ||
		    ISLOOPBACK(ifr.ifr_name, ifr.ifr_flags))
			continue;

		for (cp = ifrp->ifr_name; !isdigit((unsigned char)*cp); ++cp)
			continue;
		n = atoi(cp);
		if (n < minunit) {
			minunit = n;
			mp = ifrp;
		}
	}
	(void)close(fd);
	if (mp == NULL) {
		(void)strlcpy(errbuf, "no suitable device found",
		    PCAP_ERRBUF_SIZE);
		return (NULL);
	}

	(void)strlcpy(device, mp->ifr_name, sizeof(device));
	return (device);
#endif
}

int
pcap_lookupnet(const char *device, bpf_u_int32 *netp, bpf_u_int32 *maskp,
    char *errbuf)
{
	int fd;
	struct sockaddr_in *sin;
	struct ifreq ifr;

	fd = socket(AF_INET, SOCK_DGRAM, 0);
	if (fd < 0) {
		(void)snprintf(errbuf, PCAP_ERRBUF_SIZE, "socket: %s",
		    pcap_strerror(errno));
		return (-1);
	}
	memset(&ifr, 0, sizeof(ifr));
#ifdef linux
	/* XXX Work around Linux kernel bug */
	ifr.ifr_addr.sa_family = AF_INET;
#endif
	(void)strlcpy(ifr.ifr_name, device, sizeof(ifr.ifr_name));
	if (ioctl(fd, SIOCGIFADDR, (char *)&ifr) < 0) {
		if (errno == EADDRNOTAVAIL) {
			(void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
			    "%s: no IPv4 address assigned", device);
		} else {
			(void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
			    "SIOCGIFADDR: %s: %s",
			    device, pcap_strerror(errno));
		}
		(void)close(fd);
		return (-1);
	}
	sin = (struct sockaddr_in *)&ifr.ifr_addr;
	*netp = sin->sin_addr.s_addr;
	if (ioctl(fd, SIOCGIFNETMASK, (char *)&ifr) < 0) {
		(void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
		    "SIOCGIFNETMASK: %s: %s", device, pcap_strerror(errno));
		(void)close(fd);
		return (-1);
	}
	(void)close(fd);
	*maskp = sin->sin_addr.s_addr;
	if (*maskp == 0) {
		if (IN_CLASSA(*netp))
			*maskp = IN_CLASSA_NET;
		else if (IN_CLASSB(*netp))
			*maskp = IN_CLASSB_NET;
		else if (IN_CLASSC(*netp))
			*maskp = IN_CLASSC_NET;
		else {
			(void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
			    "inet class for 0x%x unknown", *netp);
			return (-1);
		}
	}
	*netp &= *maskp;
	return (0);
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: inet.c,v 1.24 2015/12/22 19:51:04 mmcc Exp $ */
2
3			/*
4			* Copyright (c) 1994, 1995, 1996, 1997, 1998
5			* The Regents of the University of California. All rights reserved.
6			*
7			* Redistribution and use in source and binary forms, with or without
8			* modification, are permitted provided that the following conditions
9			* are met:
10			* 1. Redistributions of source code must retain the above copyright
11			* notice, this list of conditions and the following disclaimer.
12			* 2. Redistributions in binary form must reproduce the above copyright
13			* notice, this list of conditions and the following disclaimer in the
14			* documentation and/or other materials provided with the distribution.
15			* 3. All advertising materials mentioning features or use of this software
16			* must display the following acknowledgement:
17			* This product includes software developed by the Computer Systems
18			* Engineering Group at Lawrence Berkeley Laboratory.
19			* 4. Neither the name of the University nor of the Laboratory may be used
20			* to endorse or promote products derived from this software without
21			* specific prior written permission.
22			*
23			* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24			* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25			* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26			* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27			* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28			* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29			* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30			* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31			* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32			* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33			* SUCH DAMAGE.
34			*/
35
36
37			#include <sys/file.h>
38			#include <sys/ioctl.h>
39			#include <sys/socket.h>
40			#ifdef HAVE_SYS_SOCKIO_H
41			#include <sys/sockio.h>
42			#endif
43			#include <sys/time.h> /* concession to AIX */
44
45			struct mbuf;
46			struct rtentry;
47
48			#include <net/if.h>
49			#include <netinet/in.h>
50
51			#include <ctype.h>
52			#include <errno.h>
53			#include <stdio.h>
54			#include <stdlib.h>
55			#include <string.h>
56			#include <unistd.h>
57			#ifdef HAVE_IFADDRS_H
58			#include <ifaddrs.h>
59			#endif
60
61			#include "pcap-int.h"
62
63			#ifdef HAVE_OS_PROTO_H
64			#include "os-proto.h"
65			#endif
66
67			/*
68			* Free a list of interfaces.
69			*/
70			void
71			pcap_freealldevs(pcap_if_t *alldevs)
72			{
73			pcap_if_t curdev, nextdev;
74			pcap_addr_t curaddr, nextaddr;
75
76			for (curdev = alldevs; curdev != NULL; curdev = nextdev) {
77			nextdev = curdev->next;
78
79			/*
80			* Free all addresses.
81			*/
82			for (curaddr = curdev->addresses; curaddr != NULL;
83			curaddr = nextaddr) {
84			nextaddr = curaddr->next;
85			free(curaddr->addr);
86			free(curaddr->netmask);
87			free(curaddr->broadaddr);
88			free(curaddr->dstaddr);
89			free(curaddr);
90			}
91
92			/*
93			* Free the name string.
94			*/
95			free(curdev->name);
96
97			/*
98			* Free the description string, if any.
99			*/
100			free(curdev->description);
101
102			/*
103			* Free the interface.
104			*/
105			free(curdev);
106			}
107			}
108
109			/*
110			* Return the name of a network interface attached to the system, or NULL
111			* if none can be found. The interface must be configured up; the
112			* lowest unit number is preferred; loopback is ignored.
113			*/
114			char *
115			pcap_lookupdev(errbuf)
116			char *errbuf;
117			{
118			#ifdef HAVE_IFADDRS_H
119			struct ifaddrs ifap, ifa, *mp;
120			int n, minunit;
121			char *cp;
122			static char device[IF_NAMESIZE + 1];
123
124			if (getifaddrs(&ifap) != 0) {
125			(void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
126			"getifaddrs: %s", pcap_strerror(errno));
127			return NULL;
128			}
129
130			mp = NULL;
131			minunit = 666;
132			for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
133			if ((ifa->ifa_flags & IFF_UP) == 0)
134			continue;
135			if (ISLOOPBACK(ifa->ifa_name, ifa->ifa_flags))
136			continue;
137			for (cp = ifa->ifa_name; !isdigit((unsigned char)*cp); ++cp)
138			continue;
139			n = atoi(cp);
140			if (n < minunit) {
141			minunit = n;
142			mp = ifa;
143			}
144			}
145			if (mp == NULL) {
146			(void)strlcpy(errbuf, "no suitable device found",
147			PCAP_ERRBUF_SIZE);
148			freeifaddrs(ifap);
149			return (NULL);
150			}
151
152			(void)strlcpy(device, mp->ifa_name, sizeof(device));
153			freeifaddrs(ifap);
154			return (device);
155			#else
156			int fd, minunit, n;
157			char *cp;
158			struct ifreq ifrp, ifend, ifnext, mp;
159			struct ifconf ifc;
160			struct ifreq ibuf[16], ifr;
161			static char device[sizeof(ifrp->ifr_name) + 1];
162
163			fd = socket(AF_INET, SOCK_DGRAM, 0);
164			if (fd < 0) {
165			(void)snprintf(errbuf, PCAP_ERRBUF_SIZE, "socket: %s",
166			pcap_strerror(errno));
167			return (NULL);
168			}
169			ifc.ifc_len = sizeof ibuf;
170			ifc.ifc_buf = (caddr_t)ibuf;
171
172			memset((char *)ibuf, 0, sizeof(ibuf));
173			if (ioctl(fd, SIOCGIFCONF, (char *)&ifc) < 0 \|\|
174			ifc.ifc_len < sizeof(struct ifreq)) {
175			(void)snprintf(errbuf, PCAP_ERRBUF_SIZE, "SIOCGIFCONF: %s",
176			pcap_strerror(errno));
177			(void)close(fd);
178			return (NULL);
179			}
180			ifrp = ibuf;
181			ifend = (struct ifreq )((char )ibuf + ifc.ifc_len);
182
183			mp = NULL;
184			minunit = 666;
185			for (; ifrp < ifend; ifrp = ifnext) {
186			#ifdef HAVE_SOCKADDR_SA_LEN
187			n = ifrp->ifr_addr.sa_len + sizeof(ifrp->ifr_name);
188			if (n < sizeof(*ifrp))
189			ifnext = ifrp + 1;
190			else
191			ifnext = (struct ifreq )((char )ifrp + n);
192			if (ifrp->ifr_addr.sa_family != AF_INET)
193			continue;
194			#else
195			ifnext = ifrp + 1;
196			#endif
197			/*
198			* Need a template to preserve address info that is
199			* used below to locate the next entry. (Otherwise,
200			* SIOCGIFFLAGS stomps over it because the requests
201			* are returned in a union.)
202			*/
203			(void)strlcpy(ifr.ifr_name, ifrp->ifr_name,
204			sizeof(ifr.ifr_name));
205			if (ioctl(fd, SIOCGIFFLAGS, (char *)&ifr) < 0) {
206			if (errno == ENXIO)
207			continue;
208			(void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
209			"SIOCGIFFLAGS: %.*s: %s",
210			(int)sizeof(ifr.ifr_name), ifr.ifr_name,
211			pcap_strerror(errno));
212			(void)close(fd);
213			return (NULL);
214			}
215
216			/* Must be up and not the loopback */
217			if ((ifr.ifr_flags & IFF_UP) == 0 \|\|
218			ISLOOPBACK(ifr.ifr_name, ifr.ifr_flags))
219			continue;
220
221			for (cp = ifrp->ifr_name; !isdigit((unsigned char)*cp); ++cp)
222			continue;
223			n = atoi(cp);
224			if (n < minunit) {
225			minunit = n;
226			mp = ifrp;
227			}
228			}
229			(void)close(fd);
230			if (mp == NULL) {
231			(void)strlcpy(errbuf, "no suitable device found",
232			PCAP_ERRBUF_SIZE);
233			return (NULL);
234			}
235
236			(void)strlcpy(device, mp->ifr_name, sizeof(device));
237			return (device);
238			#endif
239			}
240
241			int
242			pcap_lookupnet(const char device, bpf_u_int32 netp, bpf_u_int32 *maskp,
243			char *errbuf)
244			{
245			int fd;
246			struct sockaddr_in *sin;
247			struct ifreq ifr;
248
249			fd = socket(AF_INET, SOCK_DGRAM, 0);
250			if (fd < 0) {
251			(void)snprintf(errbuf, PCAP_ERRBUF_SIZE, "socket: %s",
252			pcap_strerror(errno));
253			return (-1);
254			}
255			memset(&ifr, 0, sizeof(ifr));
256			#ifdef linux
257			/* XXX Work around Linux kernel bug */
258			ifr.ifr_addr.sa_family = AF_INET;
259			#endif
260			(void)strlcpy(ifr.ifr_name, device, sizeof(ifr.ifr_name));
261			if (ioctl(fd, SIOCGIFADDR, (char *)&ifr) < 0) {
262			if (errno == EADDRNOTAVAIL) {
263			(void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
264			"%s: no IPv4 address assigned", device);
265			} else {
266			(void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
267			"SIOCGIFADDR: %s: %s",
268			device, pcap_strerror(errno));
269			}
270			(void)close(fd);
271			return (-1);
272			}
273			sin = (struct sockaddr_in *)&ifr.ifr_addr;
274			*netp = sin->sin_addr.s_addr;
275			if (ioctl(fd, SIOCGIFNETMASK, (char *)&ifr) < 0) {
276			(void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
277			"SIOCGIFNETMASK: %s: %s", device, pcap_strerror(errno));
278			(void)close(fd);
279			return (-1);
280			}
281			(void)close(fd);
282			*maskp = sin->sin_addr.s_addr;
283			if (*maskp == 0) {
284			if (IN_CLASSA(*netp))
285			*maskp = IN_CLASSA_NET;
286			else if (IN_CLASSB(*netp))
287			*maskp = IN_CLASSB_NET;
288			else if (IN_CLASSC(*netp))
289			*maskp = IN_CLASSC_NET;
290			else {
291			(void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
292			"inet class for 0x%x unknown", *netp);
293			return (-1);
294			}
295			}
296			netp &= maskp;
297			return (0);
298			}