libpcap-1.3.0/pcap-libdlpi.c - nest-learning-thermostat/5.0/libpcap - Git at Google

 /*
  * Copyright (c) 1993, 1994, 1995, 1996, 1997
  *	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: (1) source code distributions
  * retain the above copyright notice and this paragraph in its entirety, (2)
  * distributions including binary code include the above copyright notice and
  * this paragraph in its entirety in the documentation or other materials
  * provided with the distribution, and (3) all advertising materials mentioning
  * features or use of this software display the following acknowledgement:
  * ``This product includes software developed by the University of California,
  * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
  * the University nor the names of its contributors may be used to endorse
  * or promote products derived from this software without specific prior
  * written permission.
  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  *
  * This code contributed by Sagun Shakya (sagun.shakya@sun.com)
  */
 /*
  * Packet capture routines for DLPI using libdlpi under SunOS 5.11.
  */

 #ifndef lint
 static const char rcsid[] _U_ =
 	"@(#) $Header: /tcpdump/master/libpcap/pcap-libdlpi.c,v 1.6 2008-04-14 20:40:58 guy Exp $ (LBL)";
 #endif

 #ifdef HAVE_CONFIG_H
 #include "config.h"
 #endif

 #include <sys/types.h>
 #include <sys/time.h>
 #include <sys/bufmod.h>
 #include <sys/stream.h>
 #include <libdlpi.h>
 #include <errno.h>
 #include <memory.h>
 #include <stropts.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>

 #include "pcap-int.h"
 #include "dlpisubs.h"

 /* Forwards. */
 static int dlpromiscon(pcap_t *, bpf_u_int32);
 static int pcap_read_libdlpi(pcap_t *, int, pcap_handler, u_char *);
 static int pcap_inject_libdlpi(pcap_t *, const void *, size_t);
 static void pcap_close_libdlpi(pcap_t *);
 static void pcap_libdlpi_err(const char *, const char *, int, char *);
 static void pcap_cleanup_libdlpi(pcap_t *);

 /*
  * list_interfaces() will list all the network links that are
  * available on a system.
  */
 static boolean_t list_interfaces(const char *, void *);

 typedef struct linknamelist {
 	char	linkname[DLPI_LINKNAME_MAX];
 	struct linknamelist *lnl_next;
 } linknamelist_t;

 typedef struct linkwalk {
 	linknamelist_t	*lw_list;
 	int		lw_err;
 } linkwalk_t;

 /*
  * The caller of this function should free the memory allocated
  * for each linknamelist_t "entry" allocated.
  */
 static boolean_t
 list_interfaces(const char *linkname, void *arg)
 {
 	linkwalk_t	*lwp = arg;
 	linknamelist_t	*entry;

 	if ((entry = calloc(1, sizeof(linknamelist_t))) == NULL) {
 		lwp->lw_err = ENOMEM;
 		return (B_TRUE);
 	}
 	(void) strlcpy(entry->linkname, linkname, DLPI_LINKNAME_MAX);

 	if (lwp->lw_list == NULL) {
 		lwp->lw_list = entry;
 	} else {
 		entry->lnl_next = lwp->lw_list;
 		lwp->lw_list = entry;
 	}

 	return (B_FALSE);
 }

 static int
 pcap_activate_libdlpi(pcap_t *p)
 {
 	int retv;
 	dlpi_handle_t dh;
 	dlpi_info_t dlinfo;
 	int err = PCAP_ERROR;

 	/*
 	 * Enable Solaris raw and passive DLPI extensions;
 	 * dlpi_open() will not fail if the underlying link does not support
 	 * passive mode. See dlpi(7P) for details.
 	 */
 	retv = dlpi_open(p->opt.source, &dh, DLPI_RAW|DLPI_PASSIVE);
 	if (retv != DLPI_SUCCESS) {
 		if (retv == DLPI_ELINKNAMEINVAL || retv == DLPI_ENOLINK)
 			err = PCAP_ERROR_NO_SUCH_DEVICE;
 		else if (retv == DL_SYSERR &&
 		    (errno == EPERM || errno == EACCES))
 			err = PCAP_ERROR_PERM_DENIED;
 		pcap_libdlpi_err(p->opt.source, "dlpi_open", retv,
 		    p->errbuf);
 		return (err);
 	}
 	p->dlpi_hd = dh;

 	if (p->opt.rfmon) {
 		/*
 		 * This device exists, but we don't support monitor mode
 		 * any platforms that support DLPI.
 		 */
 		err = PCAP_ERROR_RFMON_NOTSUP;
 		goto bad;
 	}

 	/* Bind with DLPI_ANY_SAP. */
 	if ((retv = dlpi_bind(p->dlpi_hd, DLPI_ANY_SAP, 0)) != DLPI_SUCCESS) {
 		pcap_libdlpi_err(p->opt.source, "dlpi_bind", retv, p->errbuf);
 		goto bad;
 	}

 	/* Enable promiscuous mode. */
 	if (p->opt.promisc) {
 		err = dlpromiscon(p, DL_PROMISC_PHYS);
 		if (err < 0) {
 			/*
 			 * "You don't have permission to capture on
 			 * this device" and "you don't have permission
 			 * to capture in promiscuous mode on this
 			 * device" are different; let the user know,
 			 * so if they can't get permission to
 			 * capture in promiscuous mode, they can at
 			 * least try to capture in non-promiscuous
 			 * mode.
 			 *
 			 * XXX - you might have to capture in
 			 * promiscuous mode to see outgoing packets.
 			 */
 			if (err == PCAP_ERROR_PERM_DENIED)
 				err = PCAP_ERROR_PROMISC_PERM_DENIED;
 			goto bad;
 		}
 	} else {
 		/* Try to enable multicast. */
 		err = dlpromiscon(p, DL_PROMISC_MULTI);
 		if (err < 0)
 			goto bad;
 	}

 	/* Try to enable SAP promiscuity. */
 	err = dlpromiscon(p, DL_PROMISC_SAP);
 	if (err < 0) {
 		/*
 		 * Not fatal, since the DL_PROMISC_PHYS mode worked.
 		 * Report it as a warning, however.
 		 */
 		if (p->opt.promisc)
 			err = PCAP_WARNING;
 		else
 			goto bad;
 	}

 	/* Determine link type.  */
 	if ((retv = dlpi_info(p->dlpi_hd, &dlinfo, 0)) != DLPI_SUCCESS) {
 		pcap_libdlpi_err(p->opt.source, "dlpi_info", retv, p->errbuf);
 		goto bad;
 	}

 	if (pcap_process_mactype(p, dlinfo.di_mactype) != 0)
 		goto bad;

 	p->fd = dlpi_fd(p->dlpi_hd);

 	/* Push and configure bufmod. */
 	if (pcap_conf_bufmod(p, p->snapshot, p->md.timeout) != 0)
 		goto bad;

 	/*
 	 * Flush the read side.
 	 */
 	if (ioctl(p->fd, I_FLUSH, FLUSHR) != 0) {
 		snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "FLUSHR: %s",
 		    pcap_strerror(errno));
 		goto bad;
 	}

 	/* Allocate data buffer. */
 	if (pcap_alloc_databuf(p) != 0)
 		goto bad;

 	/*
 	 * "p->fd" is a FD for a STREAMS device, so "select()" and
 	 * "poll()" should work on it.
 	 */
 	p->selectable_fd = p->fd;

 	p->read_op = pcap_read_libdlpi;
 	p->inject_op = pcap_inject_libdlpi;
 	p->setfilter_op = install_bpf_program;	/* No kernel filtering */
 	p->setdirection_op = NULL;	/* Not implemented */
 	p->set_datalink_op = NULL;	/* Can't change data link type */
 	p->getnonblock_op = pcap_getnonblock_fd;
 	p->setnonblock_op = pcap_setnonblock_fd;
 	p->stats_op = pcap_stats_dlpi;
 	p->cleanup_op = pcap_cleanup_libdlpi;

 	return (0);
 bad:
 	pcap_cleanup_libdlpi(p);
 	return (err);
 }

 #define STRINGIFY(n)	#n

 static int
 dlpromiscon(pcap_t *p, bpf_u_int32 level)
 {
 	int err;

 	retv = dlpi_promiscon(p->hd, level);
 	if (retv != DLPI_SUCCESS) {
 		if (retv == DL_SYSERR &&
 		    (errno == EPERM || errno == EACCES))
 			err = PCAP_ERROR_PERM_DENIED;
 		else
 			err = PCAP_ERROR;
 		pcap_libdlpi_err(p->opt.source, "dlpi_promiscon" STRINGIFY(level),
 		    retv, p->errbuf);
 		return (err);
 	}
 	return (0);
 }

 /*
  * In Solaris, the "standard" mechanism" i.e SIOCGLIFCONF will only find
  * network links that are plumbed and are up. dlpi_walk(3DLPI) will find
  * additional network links present in the system.
  */
 int
 pcap_platform_finddevs(pcap_if_t **alldevsp, char *errbuf)
 {
 	int retv = 0;

 	linknamelist_t	*entry, *next;
 	linkwalk_t	lw = {NULL, 0};
 	int 		save_errno;

 	/* dlpi_walk() for loopback will be added here. */

 	dlpi_walk(list_interfaces, &lw, 0);

 	if (lw.lw_err != 0) {
 		snprintf(errbuf, PCAP_ERRBUF_SIZE,
 		    "dlpi_walk: %s", pcap_strerror(lw.lw_err));
 		retv = -1;
 		goto done;
 	}

 	/* Add linkname if it does not exist on the list. */
 	for (entry = lw.lw_list; entry != NULL; entry = entry->lnl_next) {
 		if (pcap_add_if(alldevsp, entry->linkname, 0, NULL, errbuf) < 0)
 			retv = -1;
 	}
 done:
 	save_errno = errno;
 	for (entry = lw.lw_list; entry != NULL; entry = next) {
 		next = entry->lnl_next;
 		free(entry);
 	}
 	errno = save_errno;

 	return (retv);
 }

 /*
  * Read data received on DLPI handle. Returns -2 if told to terminate, else
  * returns the number of packets read.
  */
 static int
 pcap_read_libdlpi(pcap_t *p, int count, pcap_handler callback, u_char *user)
 {
 	int len;
 	u_char *bufp;
 	size_t msglen;
 	int retv;

 	len = p->cc;
 	if (len != 0) {
 		bufp = p->bp;
 		goto process_pkts;
 	}
 	do {
 		/* Has "pcap_breakloop()" been called? */
 		if (p->break_loop) {
 			/*
 			 * Yes - clear the flag that indicates that it has,
 			 * and return -2 to indicate that we were told to
 			 * break out of the loop.
 			 */
 			p->break_loop = 0;
 			return (-2);
 		}

 		msglen = p->bufsize;
 		bufp = p->buffer + p->offset;

 		retv = dlpi_recv(p->dlpi_hd, NULL, NULL, bufp,
 		    &msglen, -1, NULL);
 		if (retv != DLPI_SUCCESS) {
 			/*
 			 * This is most likely a call to terminate out of the
 			 * loop. So, do not return an error message, instead
 			 * check if "pcap_breakloop()" has been called above.
 			 */
 			if (retv == DL_SYSERR && errno == EINTR) {
 				len = 0;
 				continue;
 			}
 			pcap_libdlpi_err(dlpi_linkname(p->dlpi_hd),
 			    "dlpi_recv", retv, p->errbuf);
 			return (-1);
 		}
 		len = msglen;
 	} while (len == 0);

 process_pkts:
 	return (pcap_process_pkts(p, callback, user, count, bufp, len));
 }

 static int
 pcap_inject_libdlpi(pcap_t *p, const void *buf, size_t size)
 {
 	int retv;

 	retv = dlpi_send(p->dlpi_hd, NULL, 0, buf, size, NULL);
 	if (retv != DLPI_SUCCESS) {
 		pcap_libdlpi_err(dlpi_linkname(p->dlpi_hd), "dlpi_send", retv,
 		    p->errbuf);
 		return (-1);
 	}
 	/*
 	 * dlpi_send(3DLPI) does not provide a way to return the number of
 	 * bytes sent on the wire. Based on the fact that DLPI_SUCCESS was
 	 * returned we are assuming 'size' bytes were sent.
 	 */
 	return (size);
 }

 /*
  * Close dlpi handle.
  */
 static void
 pcap_cleanup_libdlpi(pcap_t *p)
 {
 	if (p->dlpi_hd != NULL) {
 		dlpi_close(p->dlpi_hd);
 		p->dlpi_hd = NULL;
 		p->fd = -1;
 	}
 	pcap_cleanup_live_common(p);
 }

 /*
  * Write error message to buffer.
  */
 static void
 pcap_libdlpi_err(const char *linkname, const char *func, int err, char *errbuf)
 {
 	snprintf(errbuf, PCAP_ERRBUF_SIZE, "libpcap: %s failed on %s: %s",
 	    func, linkname, dlpi_strerror(err));
 }

 pcap_t *
 pcap_create(const char *device, char *ebuf)
 {
 	pcap_t *p;

 	p = pcap_create_common(device, ebuf);
 	if (p == NULL)
 		return (NULL);

 	p->activate_op = pcap_activate_libdlpi;
 	return (p);
 }
	/*
	* Copyright (c) 1993, 1994, 1995, 1996, 1997
	* 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: (1) source code distributions
	* retain the above copyright notice and this paragraph in its entirety, (2)
	* distributions including binary code include the above copyright notice and
	* this paragraph in its entirety in the documentation or other materials
	* provided with the distribution, and (3) all advertising materials mentioning
	* features or use of this software display the following acknowledgement:
	* ``This product includes software developed by the University of California,
	* Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
	* the University nor the names of its contributors may be used to endorse
	* or promote products derived from this software without specific prior
	* written permission.
	* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
	* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
	* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
	*
	* This code contributed by Sagun Shakya (sagun.shakya@sun.com)
	*/
	/*
	* Packet capture routines for DLPI using libdlpi under SunOS 5.11.
	*/

	#ifndef lint
	static const char rcsid[] _U_ =
	"@(#) $Header: /tcpdump/master/libpcap/pcap-libdlpi.c,v 1.6 2008-04-14 20:40:58 guy Exp $ (LBL)";
	#endif

	#ifdef HAVE_CONFIG_H
	#include "config.h"
	#endif

	#include <sys/types.h>
	#include <sys/time.h>
	#include <sys/bufmod.h>
	#include <sys/stream.h>
	#include <libdlpi.h>
	#include <errno.h>
	#include <memory.h>
	#include <stropts.h>
	#include <stdio.h>
	#include <stdlib.h>
	#include <string.h>

	#include "pcap-int.h"
	#include "dlpisubs.h"

	/* Forwards. */
	static int dlpromiscon(pcap_t *, bpf_u_int32);
	static int pcap_read_libdlpi(pcap_t , int, pcap_handler, u_char );
	static int pcap_inject_libdlpi(pcap_t , const void , size_t);
	static void pcap_close_libdlpi(pcap_t *);
	static void pcap_libdlpi_err(const char , const char , int, char *);
	static void pcap_cleanup_libdlpi(pcap_t *);

	/*
	* list_interfaces() will list all the network links that are
	* available on a system.
	*/
	static boolean_t list_interfaces(const char , void );

	typedef struct linknamelist {
	char linkname[DLPI_LINKNAME_MAX];
	struct linknamelist *lnl_next;
	} linknamelist_t;

	typedef struct linkwalk {
	linknamelist_t *lw_list;
	int lw_err;
	} linkwalk_t;

	/*
	* The caller of this function should free the memory allocated
	* for each linknamelist_t "entry" allocated.
	*/
	static boolean_t
	list_interfaces(const char linkname, void arg)
	{
	linkwalk_t *lwp = arg;
	linknamelist_t *entry;

	if ((entry = calloc(1, sizeof(linknamelist_t))) == NULL) {
	lwp->lw_err = ENOMEM;
	return (B_TRUE);
	}
	(void) strlcpy(entry->linkname, linkname, DLPI_LINKNAME_MAX);

	if (lwp->lw_list == NULL) {
	lwp->lw_list = entry;
	} else {
	entry->lnl_next = lwp->lw_list;
	lwp->lw_list = entry;
	}

	return (B_FALSE);
	}

	static int
	pcap_activate_libdlpi(pcap_t *p)
	{
	int retv;
	dlpi_handle_t dh;
	dlpi_info_t dlinfo;
	int err = PCAP_ERROR;

	/*
	* Enable Solaris raw and passive DLPI extensions;
	* dlpi_open() will not fail if the underlying link does not support
	* passive mode. See dlpi(7P) for details.
	*/
	retv = dlpi_open(p->opt.source, &dh, DLPI_RAW\|DLPI_PASSIVE);
	if (retv != DLPI_SUCCESS) {
	if (retv == DLPI_ELINKNAMEINVAL \|\| retv == DLPI_ENOLINK)
	err = PCAP_ERROR_NO_SUCH_DEVICE;
	else if (retv == DL_SYSERR &&
	(errno == EPERM \|\| errno == EACCES))
	err = PCAP_ERROR_PERM_DENIED;
	pcap_libdlpi_err(p->opt.source, "dlpi_open", retv,
	p->errbuf);
	return (err);
	}
	p->dlpi_hd = dh;

	if (p->opt.rfmon) {
	/*
	* This device exists, but we don't support monitor mode
	* any platforms that support DLPI.
	*/
	err = PCAP_ERROR_RFMON_NOTSUP;
	goto bad;
	}

	/* Bind with DLPI_ANY_SAP. */
	if ((retv = dlpi_bind(p->dlpi_hd, DLPI_ANY_SAP, 0)) != DLPI_SUCCESS) {
	pcap_libdlpi_err(p->opt.source, "dlpi_bind", retv, p->errbuf);
	goto bad;
	}

	/* Enable promiscuous mode. */
	if (p->opt.promisc) {
	err = dlpromiscon(p, DL_PROMISC_PHYS);
	if (err < 0) {
	/*
	* "You don't have permission to capture on
	* this device" and "you don't have permission
	* to capture in promiscuous mode on this
	* device" are different; let the user know,
	* so if they can't get permission to
	* capture in promiscuous mode, they can at
	* least try to capture in non-promiscuous
	* mode.
	*
	* XXX - you might have to capture in
	* promiscuous mode to see outgoing packets.
	*/
	if (err == PCAP_ERROR_PERM_DENIED)
	err = PCAP_ERROR_PROMISC_PERM_DENIED;
	goto bad;
	}
	} else {
	/* Try to enable multicast. */
	err = dlpromiscon(p, DL_PROMISC_MULTI);
	if (err < 0)
	goto bad;
	}

	/* Try to enable SAP promiscuity. */
	err = dlpromiscon(p, DL_PROMISC_SAP);
	if (err < 0) {
	/*
	* Not fatal, since the DL_PROMISC_PHYS mode worked.
	* Report it as a warning, however.
	*/
	if (p->opt.promisc)
	err = PCAP_WARNING;
	else
	goto bad;
	}

	/* Determine link type. */
	if ((retv = dlpi_info(p->dlpi_hd, &dlinfo, 0)) != DLPI_SUCCESS) {
	pcap_libdlpi_err(p->opt.source, "dlpi_info", retv, p->errbuf);
	goto bad;
	}

	if (pcap_process_mactype(p, dlinfo.di_mactype) != 0)
	goto bad;

	p->fd = dlpi_fd(p->dlpi_hd);

	/* Push and configure bufmod. */
	if (pcap_conf_bufmod(p, p->snapshot, p->md.timeout) != 0)
	goto bad;

	/*
	* Flush the read side.
	*/
	if (ioctl(p->fd, I_FLUSH, FLUSHR) != 0) {
	snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "FLUSHR: %s",
	pcap_strerror(errno));
	goto bad;
	}

	/* Allocate data buffer. */
	if (pcap_alloc_databuf(p) != 0)
	goto bad;

	/*
	* "p->fd" is a FD for a STREAMS device, so "select()" and
	* "poll()" should work on it.
	*/
	p->selectable_fd = p->fd;

	p->read_op = pcap_read_libdlpi;
	p->inject_op = pcap_inject_libdlpi;
	p->setfilter_op = install_bpf_program; /* No kernel filtering */
	p->setdirection_op = NULL; /* Not implemented */
	p->set_datalink_op = NULL; /* Can't change data link type */
	p->getnonblock_op = pcap_getnonblock_fd;
	p->setnonblock_op = pcap_setnonblock_fd;
	p->stats_op = pcap_stats_dlpi;
	p->cleanup_op = pcap_cleanup_libdlpi;

	return (0);
	bad:
	pcap_cleanup_libdlpi(p);
	return (err);
	}

	#define STRINGIFY(n) #n

	static int
	dlpromiscon(pcap_t *p, bpf_u_int32 level)
	{
	int err;

	retv = dlpi_promiscon(p->hd, level);
	if (retv != DLPI_SUCCESS) {
	if (retv == DL_SYSERR &&
	(errno == EPERM \|\| errno == EACCES))
	err = PCAP_ERROR_PERM_DENIED;
	else
	err = PCAP_ERROR;
	pcap_libdlpi_err(p->opt.source, "dlpi_promiscon" STRINGIFY(level),
	retv, p->errbuf);
	return (err);
	}
	return (0);
	}

	/*
	* In Solaris, the "standard" mechanism" i.e SIOCGLIFCONF will only find
	* network links that are plumbed and are up. dlpi_walk(3DLPI) will find
	* additional network links present in the system.
	*/
	int
	pcap_platform_finddevs(pcap_if_t *alldevsp, char errbuf)
	{
	int retv = 0;

	linknamelist_t entry, next;
	linkwalk_t lw = {NULL, 0};
	int save_errno;

	/* dlpi_walk() for loopback will be added here. */

	dlpi_walk(list_interfaces, &lw, 0);

	if (lw.lw_err != 0) {
	snprintf(errbuf, PCAP_ERRBUF_SIZE,
	"dlpi_walk: %s", pcap_strerror(lw.lw_err));
	retv = -1;
	goto done;
	}

	/* Add linkname if it does not exist on the list. */
	for (entry = lw.lw_list; entry != NULL; entry = entry->lnl_next) {
	if (pcap_add_if(alldevsp, entry->linkname, 0, NULL, errbuf) < 0)
	retv = -1;
	}
	done:
	save_errno = errno;
	for (entry = lw.lw_list; entry != NULL; entry = next) {
	next = entry->lnl_next;
	free(entry);
	}
	errno = save_errno;

	return (retv);
	}

	/*
	* Read data received on DLPI handle. Returns -2 if told to terminate, else
	* returns the number of packets read.
	*/
	static int
	pcap_read_libdlpi(pcap_t p, int count, pcap_handler callback, u_char user)
	{
	int len;
	u_char *bufp;
	size_t msglen;
	int retv;

	len = p->cc;
	if (len != 0) {
	bufp = p->bp;
	goto process_pkts;
	}
	do {
	/* Has "pcap_breakloop()" been called? */
	if (p->break_loop) {
	/*
	* Yes - clear the flag that indicates that it has,
	* and return -2 to indicate that we were told to
	* break out of the loop.
	*/
	p->break_loop = 0;
	return (-2);
	}

	msglen = p->bufsize;
	bufp = p->buffer + p->offset;

	retv = dlpi_recv(p->dlpi_hd, NULL, NULL, bufp,
	&msglen, -1, NULL);
	if (retv != DLPI_SUCCESS) {
	/*
	* This is most likely a call to terminate out of the
	* loop. So, do not return an error message, instead
	* check if "pcap_breakloop()" has been called above.
	*/
	if (retv == DL_SYSERR && errno == EINTR) {
	len = 0;
	continue;
	}
	pcap_libdlpi_err(dlpi_linkname(p->dlpi_hd),
	"dlpi_recv", retv, p->errbuf);
	return (-1);
	}
	len = msglen;
	} while (len == 0);

	process_pkts:
	return (pcap_process_pkts(p, callback, user, count, bufp, len));
	}

	static int
	pcap_inject_libdlpi(pcap_t p, const void buf, size_t size)
	{
	int retv;

	retv = dlpi_send(p->dlpi_hd, NULL, 0, buf, size, NULL);
	if (retv != DLPI_SUCCESS) {
	pcap_libdlpi_err(dlpi_linkname(p->dlpi_hd), "dlpi_send", retv,
	p->errbuf);
	return (-1);
	}
	/*
	* dlpi_send(3DLPI) does not provide a way to return the number of
	* bytes sent on the wire. Based on the fact that DLPI_SUCCESS was
	* returned we are assuming 'size' bytes were sent.
	*/
	return (size);
	}

	/*
	* Close dlpi handle.
	*/
	static void
	pcap_cleanup_libdlpi(pcap_t *p)
	{
	if (p->dlpi_hd != NULL) {
	dlpi_close(p->dlpi_hd);
	p->dlpi_hd = NULL;
	p->fd = -1;
	}
	pcap_cleanup_live_common(p);
	}

	/*
	* Write error message to buffer.
	*/
	static void
	pcap_libdlpi_err(const char linkname, const char func, int err, char *errbuf)
	{
	snprintf(errbuf, PCAP_ERRBUF_SIZE, "libpcap: %s failed on %s: %s",
	func, linkname, dlpi_strerror(err));
	}

	pcap_t *
	pcap_create(const char device, char ebuf)
	{
	pcap_t *p;

	p = pcap_create_common(device, ebuf);
	if (p == NULL)
	return (NULL);

	p->activate_op = pcap_activate_libdlpi;
	return (p);
	}