[OpenSPARC-T2-DV] / verif / env / common / vera / niu_ippktgen / C / libnet / src / libnet_if_addr.c

/*
 *  $Id: libnet_if_addr.c,v 1.21 2005/11/29 21:56:10 carlosc Exp $
 *
 *  libnet
 *  libnet_if_addr.c - interface selection code
 *
 *  Copyright (c) 1998 - 2004 Mike D. Schiffman <mike@infonexus.com>
 *  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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
 *
 */

#if (HAVE_CONFIG_H)
#include "../include/config.h"
#endif
#if (!(_WIN32) || (__CYGWIN__)) 
#include "../include/libnet.h"
#else
#include "../include/win32/libnet.h"
#endif
#ifdef HAVE_SYS_SOCKIO_H
#include <sys/sockio.h>
#endif
#include "../include/ifaddrlist.h"

#define MAX_IPADDR 512

#if !(__WIN32__)

/*
 * By testing if we can retrieve the FLAGS of an iface
 * we can know if it exists or not and if it is up.
 */
int 
libnet_check_iface(libnet_t *l)
{
    struct ifreq ifr;
    int fd, res;

    fd = socket(AF_INET, SOCK_DGRAM, 0);
    if (fd < 0)
    {
        snprintf(l->err_buf, LIBNET_ERRBUF_SIZE, "%s() socket: %s\n", __func__,
                strerror(errno));
        return (-1);
    }

    strncpy(ifr.ifr_name, l->device, sizeof(ifr.ifr_name) -1);
    ifr.ifr_name[sizeof(ifr.ifr_name) - 1] = '\0';
    
    res = ioctl(fd, SIOCGIFFLAGS, (int8_t *)&ifr);

    if (res < 0)
    {
        snprintf(l->err_buf, LIBNET_ERRBUF_SIZE, "%s() ioctl: %s\n", __func__,
                strerror(errno));
    }
    else
    {
        if ((ifr.ifr_flags & IFF_UP) == 0)
        {
            snprintf(l->err_buf, LIBNET_ERRBUF_SIZE, "%s(): %s is down\n",
                    __func__, l->device);
	    res = -1;
        }
    }
    close(fd);
    return (res);
}


/*
 *  Return the interface list
 */

#ifdef HAVE_SOCKADDR_SA_LEN
#define NEXTIFR(i) \
((struct ifreq *)((u_char *)&i->ifr_addr + i->ifr_addr.sa_len))
#else
#define NEXTIFR(i) (i + 1)
#endif

#ifndef BUFSIZE
#define BUFSIZE 2048
#endif

#ifdef HAVE_LINUX_PROCFS
#define PROC_DEV_FILE "/proc/net/dev"
#endif

int
libnet_ifaddrlist(register struct libnet_ifaddr_list **ipaddrp, int8_t *dev,
register int8_t *errbuf)
{
    register struct libnet_ifaddr_list *al;
    struct ifreq *ifr, *lifr, *pifr, nifr;
    int8_t device[sizeof(nifr.ifr_name)];
    static struct libnet_ifaddr_list ifaddrlist[MAX_IPADDR];
    
    char *p;
    struct ifconf ifc;
    struct ifreq ibuf[MAX_IPADDR];
    register int fd, nipaddr;
    
#ifdef HAVE_LINUX_PROCFS
    FILE *fp;
    char buf[2048];
#endif
    
    fd = socket(AF_INET, SOCK_DGRAM, 0);
    if (fd < 0)
    {
	snprintf(errbuf, LIBNET_ERRBUF_SIZE, "%s(): socket error: %s\n",
                __func__, strerror(errno));
	return (-1);
    }

#ifdef HAVE_LINUX_PROCFS
    if ((fp = fopen(PROC_DEV_FILE, "r")) == NULL)
    {
	snprintf(errbuf, LIBNET_ERRBUF_SIZE,
                "%s(): fopen(proc_dev_file) failed: %s\n",  __func__,
                strerror(errno));
	return (-1);
    }
#endif

    memset(&ifc, 0, sizeof(ifc));
    ifc.ifc_len = sizeof(ibuf);
    ifc.ifc_buf = (caddr_t)ibuf;

    if(ioctl(fd, SIOCGIFCONF, &ifc) < 0)
    {
	snprintf(errbuf, LIBNET_ERRBUF_SIZE,
                "%s(): ioctl(SIOCGIFCONF) error: %s\n", 
                __func__, strerror(errno));
	return(-1);
    }

    pifr = NULL;
    lifr = (struct ifreq *)&ifc.ifc_buf[ifc.ifc_len];
    
    al = ifaddrlist;
    nipaddr = 0;

#ifdef HAVE_LINUX_PROCFS
    while (fgets(buf, sizeof(buf), fp))
    {
	if ((p = strchr(buf, ':')) == NULL)
        {
            continue;
        }
        *p = '\0';
        for(p = buf; *p == ' '; p++) ;
	
        strncpy(nifr.ifr_name, p, sizeof(nifr.ifr_name) - 1);
        nifr.ifr_name[sizeof(nifr.ifr_name) - 1] = '\0';
	
#else /* !HAVE_LINUX_PROCFS */

    for (ifr = ifc.ifc_req; ifr < lifr; ifr = NEXTIFR(ifr))
    {
	/* XXX LINUX SOLARIS ifalias */
	if((p = strchr(ifr->ifr_name, ':')))
        {
            *p='\0';
        }
	if (pifr && strcmp(ifr->ifr_name, pifr->ifr_name) == 0)
        {
            continue;
        }
	strncpy(nifr.ifr_name, ifr->ifr_name, sizeof(nifr.ifr_name) - 1);
	nifr.ifr_name[sizeof(nifr.ifr_name) - 1] = '\0';
#endif

        /* save device name */
        strncpy(device, nifr.ifr_name, sizeof(device) - 1);
        device[sizeof(device) - 1] = '\0';

        if (ioctl(fd, SIOCGIFFLAGS, &nifr) < 0)
        {
            pifr = ifr;
            continue;
	}
        if ((nifr.ifr_flags & IFF_UP) == 0)
	{
            pifr = ifr;
            continue;	
	}

        if (dev == NULL && LIBNET_ISLOOPBACK(&nifr))
	{
            pifr = ifr;
            continue;
	}
	
        strncpy(nifr.ifr_name, device, sizeof(device) - 1);
        nifr.ifr_name[sizeof(nifr.ifr_name) - 1] = '\0';
        if (ioctl(fd, SIOCGIFADDR, (int8_t *)&nifr) < 0)
        {
            if (errno != EADDRNOTAVAIL)
            {
                snprintf(errbuf, LIBNET_ERRBUF_SIZE,
                        "%s(): SIOCGIFADDR: dev=%s: %s\n", __func__, device,
                        strerror(errno));
                close(fd);
                return (-1);
	    }
            else /* device has no IP address => set to 0 */
            {
                al->addr = 0;
            }
        }
        else
        {
            al->addr = ((struct sockaddr_in *)&nifr.ifr_addr)->sin_addr.s_addr;
        }

        if ((al->device = strdup(device)) == NULL)
        {
            snprintf(errbuf, LIBNET_ERRBUF_SIZE, 
                    "%s(): strdup not enough memory\n", __func__);
            return(-1);
        }

        ++al;
        ++nipaddr;

#ifndef HAVE_LINUX_PROCFS
        pifr = ifr;
#endif

    } /* while|for */
	
#ifdef HAVE_LINUX_PROCFS
    if (ferror(fp))
    {
        snprintf(errbuf, LIBNET_ERRBUF_SIZE,
                "%s(): ferror: %s\n", __func__, strerror(errno));
	return (-1);
    }
    fclose(fp);
#endif

    *ipaddrp = ifaddrlist;
    return (nipaddr);
}
#else
/* From tcptraceroute, convert a numeric IP address to a string */
#define IPTOSBUFFERS    12
static int8_t *iptos(u_int32_t in)
{
    static int8_t output[IPTOSBUFFERS][ 3 * 4 + 3 + 1];
    static int16_t which;
    u_int8_t *p;

    p = (u_int8_t *)&in;
    which = (which + 1 == IPTOSBUFFERS ? 0 : which + 1);
    snprintf(output[which], IPTOSBUFFERS, "%d.%d.%d.%d", 
            p[0], p[1], p[2], p[3]);
    return output[which];
}

int
libnet_ifaddrlist(register struct libnet_ifaddr_list **ipaddrp, int8_t *dev,
register int8_t *errbuf)
{
    int nipaddr = 0;    int i = 0;

    static struct libnet_ifaddr_list ifaddrlist[MAX_IPADDR];
    pcap_if_t *alldevs;
    pcap_if_t *d;
    int8_t err[PCAP_ERRBUF_SIZE];

    /* Retrieve the interfaces list */
    if (pcap_findalldevs(&alldevs, err) == -1)
    {
        snprintf(errbuf, LIBNET_ERRBUF_SIZE, 
                "%s(): error in pcap_findalldevs: %s\n", __func__, err);
        return (-1);
    }

    /* Scan the list printing every entry */
	for (d = alldevs; d; d = d->next)
    {
		if((!d->addresses) || (d->addresses->addr->sa_family != AF_INET))
            continue;
        if(d->flags & PCAP_IF_LOOPBACK)
            continue;
    
		/* XXX - strdup */
        ifaddrlist[i].device = strdup(d->name);
        ifaddrlist[i].addr = (u_int32_t)
                strdup(iptos(((struct sockaddr_in *)
                d->addresses->addr)->sin_addr.s_addr));
        ++i;
        ++nipaddr;
    }

    *ipaddrp = ifaddrlist;
    return (nipaddr);
}
#endif /* __WIN32__ */

int
libnet_select_device(libnet_t *l)
{
    int c, i;
    int8_t err_buf[LIBNET_ERRBUF_SIZE];
    struct libnet_ifaddr_list *address_list, *al;
    u_int32_t addr;


    if (l == NULL)
    { 
        return (-1);
    }

    if (l->device && !isdigit(l->device[0]))
    {
#if !(__WIN32__)
	if (libnet_check_iface(l) < 0)
	{
            /* err msg set in libnet_check_iface() */
	    return (-1);
	}
#endif
	return (1);
    }

    /*
     *  Number of interfaces.
     */
    c = libnet_ifaddrlist(&address_list, l->device, err_buf);
    if (c < 0)
    {
        /* err msg set in libnet_ifaddrlist() */
        return (-1);
    }
    else if (c == 0)
    {
        snprintf(l->err_buf, LIBNET_ERRBUF_SIZE,
                "%s(): no network interface found\n", __func__);
        return (-1);
    }
	
    al = address_list;
    if (l->device)
    {
        /*
         *  Then we have an IP address in l->device => do lookup
         */
	addr = libnet_name2addr4(l, l->device, 0);

        for (i = c; i; --i, ++address_list)
        {
            if (((addr == -1) && !(strncmp(l->device, address_list->device,
                   strlen(l->device)))) || 
                    (address_list->addr == addr))
            {
                /* free the "user supplied device" - see libnet_init() */
                free(l->device);
                l->device =  strdup(address_list->device);
                goto good;
            }
        }
        if (i <= 0)
        {
            snprintf(l->err_buf, LIBNET_ERRBUF_SIZE,
                    "%s(): can't find interface for IP %s\n", __func__,
                    l->device);
	    goto bad;
        }
    }
    else
    {
        l->device = strdup(address_list->device);
    }

good:
    for (i = 0; i < c; i++)
    {
        free(al[i].device);
    }
    return (1);

bad:
    for (i = 0; i < c; i++)
    {
        free(al[i].device);
    }
    return (-1);
}

/* EOF */
Commit	Line	Data
86530b38 AT	1	/*
	2	* $Id: libnet_if_addr.c,v 1.21 2005/11/29 21:56:10 carlosc Exp $
	3	*
	4	* libnet
	5	* libnet_if_addr.c - interface selection code
	6	*
	7	* Copyright (c) 1998 - 2004 Mike D. Schiffman <mike@infonexus.com>
	8	* All rights reserved.
	9	*
	10	* Redistribution and use in source and binary forms, with or without
	11	* modification, are permitted provided that the following conditions
	12	* are met:
	13	* 1. Redistributions of source code must retain the above copyright
	14	* notice, this list of conditions and the following disclaimer.
	15	* 2. Redistributions in binary form must reproduce the above copyright
	16	* notice, this list of conditions and the following disclaimer in the
	17	* documentation and/or other materials provided with the distribution.
	18	*
	19	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
	20	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	21	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	22	* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
	23	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	24	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	25	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	26	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	27	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	28	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	29	* SUCH DAMAGE.
	30	*
	31	*/
	32
	33	#if (HAVE_CONFIG_H)
	34	#include "../include/config.h"
	35	#endif
	36	#if (!(_WIN32) \|\| (__CYGWIN__))
	37	#include "../include/libnet.h"
	38	#else
	39	#include "../include/win32/libnet.h"
	40	#endif
	41	#ifdef HAVE_SYS_SOCKIO_H
	42	#include <sys/sockio.h>
	43	#endif
	44	#include "../include/ifaddrlist.h"
	45
	46	#define MAX_IPADDR 512
	47
	48	#if !(__WIN32__)
	49
	50	/*
	51	* By testing if we can retrieve the FLAGS of an iface
	52	* we can know if it exists or not and if it is up.
	53	*/
	54	int
	55	libnet_check_iface(libnet_t *l)
	56	{
	57	struct ifreq ifr;
	58	int fd, res;
	59
	60	fd = socket(AF_INET, SOCK_DGRAM, 0);
	61	if (fd < 0)
	62	{
	63	snprintf(l->err_buf, LIBNET_ERRBUF_SIZE, "%s() socket: %s\n", __func__,
	64	strerror(errno));
65	return (-1);
66	}
67
68	strncpy(ifr.ifr_name, l->device, sizeof(ifr.ifr_name) -1);
69	ifr.ifr_name[sizeof(ifr.ifr_name) - 1] = '\0';
70
71	res = ioctl(fd, SIOCGIFFLAGS, (int8_t *)&ifr);
72
73	if (res < 0)
74	{
75	snprintf(l->err_buf, LIBNET_ERRBUF_SIZE, "%s() ioctl: %s\n", __func__,
76	strerror(errno));
77	}
78	else
79	{
80	if ((ifr.ifr_flags & IFF_UP) == 0)
81	{
82	snprintf(l->err_buf, LIBNET_ERRBUF_SIZE, "%s(): %s is down\n",
83	__func__, l->device);
84	res = -1;
85	}
86	}
87	close(fd);
88	return (res);
89	}
90
91
92	/*
93	* Return the interface list
94	*/
95
96	#ifdef HAVE_SOCKADDR_SA_LEN
97	#define NEXTIFR(i) \
98	((struct ifreq )((u_char )&i->ifr_addr + i->ifr_addr.sa_len))
99	#else
100	#define NEXTIFR(i) (i + 1)
101	#endif
102
103	#ifndef BUFSIZE
104	#define BUFSIZE 2048
105	#endif
106
107	#ifdef HAVE_LINUX_PROCFS
108	#define PROC_DEV_FILE "/proc/net/dev"
109	#endif
110
111	int
112	libnet_ifaddrlist(register struct libnet_ifaddr_list *ipaddrp, int8_t dev,
113	register int8_t *errbuf)
114	{
115	register struct libnet_ifaddr_list *al;
116	struct ifreq ifr, lifr, *pifr, nifr;
117	int8_t device[sizeof(nifr.ifr_name)];
118	static struct libnet_ifaddr_list ifaddrlist[MAX_IPADDR];
119
120	char *p;
121	struct ifconf ifc;
122	struct ifreq ibuf[MAX_IPADDR];
123	register int fd, nipaddr;
124
125	#ifdef HAVE_LINUX_PROCFS
126	FILE *fp;
127	char buf[2048];
128	#endif
129
130	fd = socket(AF_INET, SOCK_DGRAM, 0);
131	if (fd < 0)
132	{
133	snprintf(errbuf, LIBNET_ERRBUF_SIZE, "%s(): socket error: %s\n",
134	__func__, strerror(errno));
135	return (-1);
136	}
137
138	#ifdef HAVE_LINUX_PROCFS
139	if ((fp = fopen(PROC_DEV_FILE, "r")) == NULL)
140	{
141	snprintf(errbuf, LIBNET_ERRBUF_SIZE,
142	"%s(): fopen(proc_dev_file) failed: %s\n", __func__,
143	strerror(errno));
144	return (-1);
145	}
146	#endif
147
148	memset(&ifc, 0, sizeof(ifc));
149	ifc.ifc_len = sizeof(ibuf);
150	ifc.ifc_buf = (caddr_t)ibuf;
151
152	if(ioctl(fd, SIOCGIFCONF, &ifc) < 0)
153	{
154	snprintf(errbuf, LIBNET_ERRBUF_SIZE,
155	"%s(): ioctl(SIOCGIFCONF) error: %s\n",
156	__func__, strerror(errno));
157	return(-1);
158	}
159
160	pifr = NULL;
161	lifr = (struct ifreq *)&ifc.ifc_buf[ifc.ifc_len];
162
163	al = ifaddrlist;
164	nipaddr = 0;
165
166	#ifdef HAVE_LINUX_PROCFS
167	while (fgets(buf, sizeof(buf), fp))
168	{
169	if ((p = strchr(buf, ':')) == NULL)
170	{
171	continue;
172	}
173	*p = '\0';
174	for(p = buf; *p == ' '; p++) ;
175
176	strncpy(nifr.ifr_name, p, sizeof(nifr.ifr_name) - 1);
177	nifr.ifr_name[sizeof(nifr.ifr_name) - 1] = '\0';
178
179	#else /* !HAVE_LINUX_PROCFS */
180
181	for (ifr = ifc.ifc_req; ifr < lifr; ifr = NEXTIFR(ifr))
182	{
183	/* XXX LINUX SOLARIS ifalias */
184	if((p = strchr(ifr->ifr_name, ':')))
185	{
186	*p='\0';
187	}
188	if (pifr && strcmp(ifr->ifr_name, pifr->ifr_name) == 0)
189	{
190	continue;
191	}
192	strncpy(nifr.ifr_name, ifr->ifr_name, sizeof(nifr.ifr_name) - 1);
193	nifr.ifr_name[sizeof(nifr.ifr_name) - 1] = '\0';
194	#endif
195
196	/* save device name */
197	strncpy(device, nifr.ifr_name, sizeof(device) - 1);
198	device[sizeof(device) - 1] = '\0';
199
200	if (ioctl(fd, SIOCGIFFLAGS, &nifr) < 0)
201	{
202	pifr = ifr;
203	continue;
204	}
205	if ((nifr.ifr_flags & IFF_UP) == 0)
206	{
207	pifr = ifr;
208	continue;
209	}
210
211	if (dev == NULL && LIBNET_ISLOOPBACK(&nifr))
212	{
213	pifr = ifr;
214	continue;
215	}
216
217	strncpy(nifr.ifr_name, device, sizeof(device) - 1);
218	nifr.ifr_name[sizeof(nifr.ifr_name) - 1] = '\0';
219	if (ioctl(fd, SIOCGIFADDR, (int8_t *)&nifr) < 0)
220	{
221	if (errno != EADDRNOTAVAIL)
222	{
223	snprintf(errbuf, LIBNET_ERRBUF_SIZE,
224	"%s(): SIOCGIFADDR: dev=%s: %s\n", __func__, device,
225	strerror(errno));
226	close(fd);
227	return (-1);
228	}
229	else /* device has no IP address => set to 0 */
230	{
231	al->addr = 0;
232	}
233	}
234	else
235	{
236	al->addr = ((struct sockaddr_in *)&nifr.ifr_addr)->sin_addr.s_addr;
237	}
238
239	if ((al->device = strdup(device)) == NULL)
240	{
241	snprintf(errbuf, LIBNET_ERRBUF_SIZE,
242	"%s(): strdup not enough memory\n", __func__);
243	return(-1);
244	}
245
246	++al;
247	++nipaddr;
248
249	#ifndef HAVE_LINUX_PROCFS
250	pifr = ifr;
251	#endif
252
253	} /* while\|for */
254
255	#ifdef HAVE_LINUX_PROCFS
256	if (ferror(fp))
257	{
258	snprintf(errbuf, LIBNET_ERRBUF_SIZE,
259	"%s(): ferror: %s\n", __func__, strerror(errno));
260	return (-1);
261	}
262	fclose(fp);
263	#endif
264
265	*ipaddrp = ifaddrlist;
266	return (nipaddr);
267	}
268	#else
269	/* From tcptraceroute, convert a numeric IP address to a string */
270	#define IPTOSBUFFERS 12
271	static int8_t *iptos(u_int32_t in)
272	{
273	static int8_t output[IPTOSBUFFERS][ 3 * 4 + 3 + 1];
274	static int16_t which;
275	u_int8_t *p;
276
277	p = (u_int8_t *)&in;
278	which = (which + 1 == IPTOSBUFFERS ? 0 : which + 1);
279	snprintf(output[which], IPTOSBUFFERS, "%d.%d.%d.%d",
280	p[0], p[1], p[2], p[3]);
281	return output[which];
282	}
283
284	int
285	libnet_ifaddrlist(register struct libnet_ifaddr_list *ipaddrp, int8_t dev,
286	register int8_t *errbuf)
287	{
288	int nipaddr = 0; int i = 0;
289
290	static struct libnet_ifaddr_list ifaddrlist[MAX_IPADDR];
291	pcap_if_t *alldevs;
292	pcap_if_t *d;
293	int8_t err[PCAP_ERRBUF_SIZE];
294
295	/* Retrieve the interfaces list */
296	if (pcap_findalldevs(&alldevs, err) == -1)
297	{
298	snprintf(errbuf, LIBNET_ERRBUF_SIZE,
299	"%s(): error in pcap_findalldevs: %s\n", __func__, err);
300	return (-1);
301	}
302
303	/* Scan the list printing every entry */
304	for (d = alldevs; d; d = d->next)
305	{
306	if((!d->addresses) \|\| (d->addresses->addr->sa_family != AF_INET))
307	continue;
308	if(d->flags & PCAP_IF_LOOPBACK)
309	continue;
310
311	/* XXX - strdup */
312	ifaddrlist[i].device = strdup(d->name);
313	ifaddrlist[i].addr = (u_int32_t)
314	strdup(iptos(((struct sockaddr_in *)
315	d->addresses->addr)->sin_addr.s_addr));
316	++i;
317	++nipaddr;
318	}
319
320	*ipaddrp = ifaddrlist;
321	return (nipaddr);
322	}
323	#endif /* __WIN32__ */
324
325	int
326	libnet_select_device(libnet_t *l)
327	{
328	int c, i;
329	int8_t err_buf[LIBNET_ERRBUF_SIZE];
330	struct libnet_ifaddr_list address_list, al;
331	u_int32_t addr;
332
333
334	if (l == NULL)
335	{
336	return (-1);
337	}
338
339	if (l->device && !isdigit(l->device[0]))
340	{
341	#if !(__WIN32__)
342	if (libnet_check_iface(l) < 0)
343	{
344	/* err msg set in libnet_check_iface() */
345	return (-1);
346	}
347	#endif
348	return (1);
349	}
350
351	/*
352	* Number of interfaces.
353	*/
354	c = libnet_ifaddrlist(&address_list, l->device, err_buf);
355	if (c < 0)
356	{
357	/* err msg set in libnet_ifaddrlist() */
358	return (-1);
359	}
360	else if (c == 0)
361	{
362	snprintf(l->err_buf, LIBNET_ERRBUF_SIZE,
363	"%s(): no network interface found\n", __func__);
364	return (-1);
365	}
366
367	al = address_list;
368	if (l->device)
369	{
370	/*
371	* Then we have an IP address in l->device => do lookup
372	*/
373	addr = libnet_name2addr4(l, l->device, 0);
374
375	for (i = c; i; --i, ++address_list)
376	{
377	if (((addr == -1) && !(strncmp(l->device, address_list->device,
378	strlen(l->device)))) \|\|
379	(address_list->addr == addr))
380	{
381	/* free the "user supplied device" - see libnet_init() */
382	free(l->device);
383	l->device = strdup(address_list->device);
384	goto good;
385	}
386	}
387	if (i <= 0)
388	{
389	snprintf(l->err_buf, LIBNET_ERRBUF_SIZE,
390	"%s(): can't find interface for IP %s\n", __func__,
391	l->device);
392	goto bad;
393	}
394	}
395	else
396	{
397	l->device = strdup(address_list->device);
398	}
399
400	good:
401	for (i = 0; i < c; i++)
402	{
403	free(al[i].device);
404	}
405	return (1);
406
407	bad:
408	for (i = 0; i < c; i++)
409	{
410	free(al[i].device);
411	}
412	return (-1);
413	}
414
415	/* EOF */