Local changes: - In contrib/libpcap/pcap/bpf.h, do not include pcap/dlt.h. Our system net/dlt.h is pulled in from net/bpf.h. - sys/net/dlt.h: Incorporate changes from libpcap 1.10.3. - lib/libpcap/Makefile: Update for libpcap 1.10.3. Changelog: https://git.tcpdump.org/libpcap/blob/95691ebe7564afa3faa5c6ba0dbd17e351be455a:/CHANGES Reviewed by: emaste Obtained from: https://www.tcpdump.org/release/libpcap-1.10.3.tar.gz Sponsored by: The FreeBSD Foundation
346 lines
9.3 KiB
C
346 lines
9.3 KiB
C
/* -*- Mode: c; tab-width: 8; indent-tabs-mode: 1; c-basic-offset: 8; -*- */
|
|
/*
|
|
* 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.
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include <config.h>
|
|
#endif
|
|
|
|
#include <sys/param.h>
|
|
#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; /* Squelch compiler warnings on some platforms for */
|
|
struct rtentry; /* declarations in <net/if.h> */
|
|
#include <net/if.h>
|
|
#include <netinet/in.h>
|
|
|
|
#include <errno.h>
|
|
#include <memory.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
|
|
#include "pcap-int.h"
|
|
|
|
#ifdef HAVE_OS_PROTO_H
|
|
#include "os-proto.h"
|
|
#endif
|
|
|
|
/*
|
|
* Get a list of all interfaces that are up and that we can open.
|
|
* Returns -1 on error, 0 otherwise.
|
|
* The list, as returned through "alldevsp", may be null if no interfaces
|
|
* were up and could be opened.
|
|
*
|
|
* This is the implementation used on platforms that have SIOCGLIFCONF
|
|
* but don't have "getifaddrs()". (Solaris 8 and later; we use
|
|
* SIOCGLIFCONF rather than SIOCGIFCONF in order to get IPv6 addresses.)
|
|
*/
|
|
int
|
|
pcap_findalldevs_interfaces(pcap_if_list_t *devlistp, char *errbuf,
|
|
int (*check_usable)(const char *), get_if_flags_func get_flags_func)
|
|
{
|
|
register int fd4, fd6, fd;
|
|
register struct lifreq *ifrp, *ifend;
|
|
struct lifnum ifn;
|
|
struct lifconf ifc;
|
|
char *buf = NULL;
|
|
unsigned buf_size;
|
|
#ifdef HAVE_SOLARIS
|
|
char *p, *q;
|
|
#endif
|
|
struct lifreq ifrflags, ifrnetmask, ifrbroadaddr, ifrdstaddr;
|
|
struct sockaddr *netmask, *broadaddr, *dstaddr;
|
|
int ret = 0;
|
|
|
|
/*
|
|
* Create a socket from which to fetch the list of interfaces,
|
|
* and from which to fetch IPv4 information.
|
|
*/
|
|
fd4 = socket(AF_INET, SOCK_DGRAM, 0);
|
|
if (fd4 < 0) {
|
|
pcap_fmt_errmsg_for_errno(errbuf, PCAP_ERRBUF_SIZE,
|
|
errno, "socket: AF_INET");
|
|
return (-1);
|
|
}
|
|
|
|
/*
|
|
* Create a socket from which to fetch IPv6 information.
|
|
*/
|
|
fd6 = socket(AF_INET6, SOCK_DGRAM, 0);
|
|
if (fd6 < 0) {
|
|
pcap_fmt_errmsg_for_errno(errbuf, PCAP_ERRBUF_SIZE,
|
|
errno, "socket: AF_INET6");
|
|
(void)close(fd4);
|
|
return (-1);
|
|
}
|
|
|
|
/*
|
|
* How many entries will SIOCGLIFCONF return?
|
|
*/
|
|
ifn.lifn_family = AF_UNSPEC;
|
|
ifn.lifn_flags = 0;
|
|
ifn.lifn_count = 0;
|
|
if (ioctl(fd4, SIOCGLIFNUM, (char *)&ifn) < 0) {
|
|
pcap_fmt_errmsg_for_errno(errbuf, PCAP_ERRBUF_SIZE,
|
|
errno, "SIOCGLIFNUM");
|
|
(void)close(fd6);
|
|
(void)close(fd4);
|
|
return (-1);
|
|
}
|
|
|
|
/*
|
|
* Allocate a buffer for those entries.
|
|
*/
|
|
buf_size = ifn.lifn_count * sizeof (struct lifreq);
|
|
buf = malloc(buf_size);
|
|
if (buf == NULL) {
|
|
pcap_fmt_errmsg_for_errno(errbuf, PCAP_ERRBUF_SIZE,
|
|
errno, "malloc");
|
|
(void)close(fd6);
|
|
(void)close(fd4);
|
|
return (-1);
|
|
}
|
|
|
|
/*
|
|
* Get the entries.
|
|
*/
|
|
ifc.lifc_len = buf_size;
|
|
ifc.lifc_buf = buf;
|
|
ifc.lifc_family = AF_UNSPEC;
|
|
ifc.lifc_flags = 0;
|
|
memset(buf, 0, buf_size);
|
|
if (ioctl(fd4, SIOCGLIFCONF, (char *)&ifc) < 0) {
|
|
pcap_fmt_errmsg_for_errno(errbuf, PCAP_ERRBUF_SIZE,
|
|
errno, "SIOCGLIFCONF");
|
|
(void)close(fd6);
|
|
(void)close(fd4);
|
|
free(buf);
|
|
return (-1);
|
|
}
|
|
|
|
/*
|
|
* Loop over the entries.
|
|
*/
|
|
ifrp = (struct lifreq *)buf;
|
|
ifend = (struct lifreq *)(buf + ifc.lifc_len);
|
|
|
|
for (; ifrp < ifend; ifrp++) {
|
|
/*
|
|
* Skip entries that begin with "dummy".
|
|
* XXX - what are these? Is this Linux-specific?
|
|
* Are there platforms on which we shouldn't do this?
|
|
*/
|
|
if (strncmp(ifrp->lifr_name, "dummy", 5) == 0)
|
|
continue;
|
|
|
|
/*
|
|
* Can we capture on this device?
|
|
*/
|
|
if (!(*check_usable)(ifrp->lifr_name)) {
|
|
/*
|
|
* No.
|
|
*/
|
|
continue;
|
|
}
|
|
|
|
/*
|
|
* IPv6 or not?
|
|
*/
|
|
if (((struct sockaddr *)&ifrp->lifr_addr)->sa_family == AF_INET6)
|
|
fd = fd6;
|
|
else
|
|
fd = fd4;
|
|
|
|
/*
|
|
* Get the flags for this interface.
|
|
*/
|
|
strncpy(ifrflags.lifr_name, ifrp->lifr_name,
|
|
sizeof(ifrflags.lifr_name));
|
|
if (ioctl(fd, SIOCGLIFFLAGS, (char *)&ifrflags) < 0) {
|
|
if (errno == ENXIO)
|
|
continue;
|
|
pcap_fmt_errmsg_for_errno(errbuf, PCAP_ERRBUF_SIZE,
|
|
errno, "SIOCGLIFFLAGS: %.*s",
|
|
(int)sizeof(ifrflags.lifr_name),
|
|
ifrflags.lifr_name);
|
|
ret = -1;
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* Get the netmask for this address on this interface.
|
|
*/
|
|
strncpy(ifrnetmask.lifr_name, ifrp->lifr_name,
|
|
sizeof(ifrnetmask.lifr_name));
|
|
memcpy(&ifrnetmask.lifr_addr, &ifrp->lifr_addr,
|
|
sizeof(ifrnetmask.lifr_addr));
|
|
if (ioctl(fd, SIOCGLIFNETMASK, (char *)&ifrnetmask) < 0) {
|
|
if (errno == EADDRNOTAVAIL) {
|
|
/*
|
|
* Not available.
|
|
*/
|
|
netmask = NULL;
|
|
} else {
|
|
pcap_fmt_errmsg_for_errno(errbuf,
|
|
PCAP_ERRBUF_SIZE, errno,
|
|
"SIOCGLIFNETMASK: %.*s",
|
|
(int)sizeof(ifrnetmask.lifr_name),
|
|
ifrnetmask.lifr_name);
|
|
ret = -1;
|
|
break;
|
|
}
|
|
} else
|
|
netmask = (struct sockaddr *)&ifrnetmask.lifr_addr;
|
|
|
|
/*
|
|
* Get the broadcast address for this address on this
|
|
* interface (if any).
|
|
*/
|
|
if (ifrflags.lifr_flags & IFF_BROADCAST) {
|
|
strncpy(ifrbroadaddr.lifr_name, ifrp->lifr_name,
|
|
sizeof(ifrbroadaddr.lifr_name));
|
|
memcpy(&ifrbroadaddr.lifr_addr, &ifrp->lifr_addr,
|
|
sizeof(ifrbroadaddr.lifr_addr));
|
|
if (ioctl(fd, SIOCGLIFBRDADDR,
|
|
(char *)&ifrbroadaddr) < 0) {
|
|
if (errno == EADDRNOTAVAIL) {
|
|
/*
|
|
* Not available.
|
|
*/
|
|
broadaddr = NULL;
|
|
} else {
|
|
pcap_fmt_errmsg_for_errno(errbuf,
|
|
PCAP_ERRBUF_SIZE, errno,
|
|
"SIOCGLIFBRDADDR: %.*s",
|
|
(int)sizeof(ifrbroadaddr.lifr_name),
|
|
ifrbroadaddr.lifr_name);
|
|
ret = -1;
|
|
break;
|
|
}
|
|
} else
|
|
broadaddr = (struct sockaddr *)&ifrbroadaddr.lifr_broadaddr;
|
|
} else {
|
|
/*
|
|
* Not a broadcast interface, so no broadcast
|
|
* address.
|
|
*/
|
|
broadaddr = NULL;
|
|
}
|
|
|
|
/*
|
|
* Get the destination address for this address on this
|
|
* interface (if any).
|
|
*/
|
|
if (ifrflags.lifr_flags & IFF_POINTOPOINT) {
|
|
strncpy(ifrdstaddr.lifr_name, ifrp->lifr_name,
|
|
sizeof(ifrdstaddr.lifr_name));
|
|
memcpy(&ifrdstaddr.lifr_addr, &ifrp->lifr_addr,
|
|
sizeof(ifrdstaddr.lifr_addr));
|
|
if (ioctl(fd, SIOCGLIFDSTADDR,
|
|
(char *)&ifrdstaddr) < 0) {
|
|
if (errno == EADDRNOTAVAIL) {
|
|
/*
|
|
* Not available.
|
|
*/
|
|
dstaddr = NULL;
|
|
} else {
|
|
pcap_fmt_errmsg_for_errno(errbuf,
|
|
PCAP_ERRBUF_SIZE, errno,
|
|
"SIOCGLIFDSTADDR: %.*s",
|
|
(int)sizeof(ifrdstaddr.lifr_name),
|
|
ifrdstaddr.lifr_name);
|
|
ret = -1;
|
|
break;
|
|
}
|
|
} else
|
|
dstaddr = (struct sockaddr *)&ifrdstaddr.lifr_dstaddr;
|
|
} else
|
|
dstaddr = NULL;
|
|
|
|
#ifdef HAVE_SOLARIS
|
|
/*
|
|
* If this entry has a colon followed by a number at
|
|
* the end, it's a logical interface. Those are just
|
|
* the way you assign multiple IP addresses to a real
|
|
* interface, so an entry for a logical interface should
|
|
* be treated like the entry for the real interface;
|
|
* we do that by stripping off the ":" and the number.
|
|
*/
|
|
p = strchr(ifrp->lifr_name, ':');
|
|
if (p != NULL) {
|
|
/*
|
|
* We have a ":"; is it followed by a number?
|
|
*/
|
|
q = p + 1;
|
|
while (PCAP_ISDIGIT(*q))
|
|
q++;
|
|
if (*q == '\0') {
|
|
/*
|
|
* All digits after the ":" until the end.
|
|
* Strip off the ":" and everything after
|
|
* it.
|
|
*/
|
|
*p = '\0';
|
|
}
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Add information for this address to the list.
|
|
*/
|
|
if (add_addr_to_if(devlistp, ifrp->lifr_name,
|
|
ifrflags.lifr_flags, get_flags_func,
|
|
(struct sockaddr *)&ifrp->lifr_addr,
|
|
sizeof (struct sockaddr_storage),
|
|
netmask, sizeof (struct sockaddr_storage),
|
|
broadaddr, sizeof (struct sockaddr_storage),
|
|
dstaddr, sizeof (struct sockaddr_storage), errbuf) < 0) {
|
|
ret = -1;
|
|
break;
|
|
}
|
|
}
|
|
free(buf);
|
|
(void)close(fd6);
|
|
(void)close(fd4);
|
|
|
|
return (ret);
|
|
}
|