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Current Path: /usr/src/contrib/libpcap

📁 ..
📄 CHANGES(41.04 KB)
📄 CMakeLists.txt(84.97 KB)
📄 CONTRIBUTING.md(1.41 KB)
📄 CREDITS(11.47 KB)
📁 ChmodBPF
📄 INSTALL.md(15.44 KB)
📄 LICENSE(868 B)
📄 Makefile-devel-adds(614 B)
📄 Makefile.in(23.68 KB)
📄 README.md(3.71 KB)
📄 TODO(1.51 KB)
📄 VERSION(6 B)
📁 Win32
📄 aclocal.m4(30.92 KB)
📄 arcnet.h(2.39 KB)
📄 atmuni31.h(3.87 KB)
📄 bpf_dump.c(1.9 KB)
📄 bpf_filter.c(12.22 KB)
📄 bpf_image.c(7.38 KB)
📄 chmod_bpf(757 B)
📁 cmake
📄 cmake_uninstall.cmake.in(1.01 KB)
📄 cmakeconfig.h.in(11.15 KB)
📄 config.guess(43.17 KB)
📄 config.h.in(10.25 KB)
📄 config.sub(34.93 KB)
📄 configure(331.21 KB)
📄 configure.ac(64.36 KB)
📄 diag-control.h(8.3 KB)
📄 dlpisubs.c(9.41 KB)
📄 dlpisubs.h(702 B)
📁 doc
📄 etherent.c(3.43 KB)
📄 ethertype.h(3.47 KB)
📄 extract.h(9.23 KB)
📄 fad-getad.c(8.62 KB)
📄 fad-gifc.c(12.84 KB)
📄 fad-glifc.c(9.37 KB)
📄 fmtutils.c(6.35 KB)
📄 fmtutils.h(2.19 KB)
📄 ftmacros.h(4.22 KB)
📄 gencode.c(257 KB)
📄 gencode.h(11.44 KB)
📄 grammar.y(24.66 KB)
📄 ieee80211.h(5.25 KB)
📄 install-sh(5.45 KB)
📁 lbl
📄 libpcap.pc.in(484 B)
📄 llc.h(2.56 KB)
📁 missing
📄 mkdep(2.43 KB)
📁 msdos
📄 nametoaddr.c(18.83 KB)
📄 nametoaddr.h(2.12 KB)
📄 nlpid.h(1.66 KB)
📄 nomkdep(135 B)
📄 optimize.c(62.27 KB)
📄 optimize.h(1.29 KB)
📄 org.tcpdump.chmod_bpf.plist(441 B)
📁 pcap
📄 pcap-bpf.c(84.02 KB)
📄 pcap-bpf.h(2.24 KB)
📄 pcap-bt-linux.c(11.42 KB)
📄 pcap-bt-linux.h(1.76 KB)
📄 pcap-bt-monitor-linux.c(7.84 KB)
📄 pcap-bt-monitor-linux.h(1.64 KB)
📄 pcap-common.c(47.14 KB)
📄 pcap-common.h(2.29 KB)
📄 pcap-config.1(2.27 KB)
📄 pcap-config.in(1.8 KB)
📄 pcap-dag.c(37.15 KB)
📄 pcap-dag.h(457 B)
📄 pcap-dbus.c(10.03 KB)
📄 pcap-dbus.h(112 B)
📄 pcap-dll.rc(1.03 KB)
📄 pcap-dlpi.c(47.56 KB)
📄 pcap-dos.c(35.9 KB)
📄 pcap-dos.h(6.7 KB)
📄 pcap-enet.c(4.74 KB)
📄 pcap-filter.manmisc.in(33.54 KB)
📄 pcap-int.h(16.94 KB)
📄 pcap-libdlpi.c(12.11 KB)
📄 pcap-linktype.manmisc.in(2.33 KB)
📄 pcap-linux.c(207.89 KB)
📄 pcap-namedb.h(1.98 KB)
📄 pcap-netfilter-linux.c(20.48 KB)
📄 pcap-netfilter-linux.h(1.67 KB)
📄 pcap-netmap.c(7.82 KB)
📄 pcap-netmap.h(126 B)
📄 pcap-new.c(12.79 KB)
📄 pcap-nit.c(10.2 KB)
📄 pcap-npf.c(51.61 KB)
📄 pcap-null.c(1.9 KB)
📄 pcap-pf.c(18.48 KB)
📄 pcap-rdmasniff.c(10.98 KB)
📄 pcap-rdmasniff.h(140 B)
📄 pcap-rpcap-int.h(3.43 KB)
📄 pcap-rpcap.c(96.91 KB)
📄 pcap-rpcap.h(2.19 KB)
📄 pcap-savefile.manfile.in(5.11 KB)
📄 pcap-septel.c(8.69 KB)
📄 pcap-septel.h(512 B)
📄 pcap-sita.c(36.34 KB)
📄 pcap-sita.h(224 B)
📄 pcap-sita.html(37.43 KB)
📄 pcap-snf.c(14.75 KB)
📄 pcap-snf.h(110 B)
📄 pcap-snit.c(12.67 KB)
📄 pcap-snoop.c(13.26 KB)
📄 pcap-tc.c(34.21 KB)
📄 pcap-tc.h(1.9 KB)
📄 pcap-tstamp.manmisc.in(7.7 KB)
📄 pcap-types.h(1.93 KB)
📄 pcap-usb-linux.c(35.89 KB)
📄 pcap-usb-linux.h(1.75 KB)
📄 pcap.3pcap.in(29.62 KB)
📄 pcap.c(103.69 KB)
📄 pcap.h(2.17 KB)
📄 pcap_activate.3pcap(3.8 KB)
📄 pcap_breakloop.3pcap(3.98 KB)
📄 pcap_can_set_rfmon.3pcap(2.63 KB)
📄 pcap_close.3pcap(1.47 KB)
📄 pcap_compile.3pcap.in(3.02 KB)
📄 pcap_create.3pcap(2.19 KB)
📄 pcap_datalink.3pcap.in(2.39 KB)
📄 pcap_datalink_name_to_val.3pcap(1.82 KB)
📄 pcap_datalink_val_to_name.3pcap(2.47 KB)
📄 pcap_dump.3pcap(1.73 KB)
📄 pcap_dump_close.3pcap(1.49 KB)
📄 pcap_dump_file.3pcap(1.54 KB)
📄 pcap_dump_flush.3pcap(1.69 KB)
📄 pcap_dump_ftell.3pcap(2.11 KB)
📄 pcap_dump_open.3pcap.in(3.31 KB)
📄 pcap_file.3pcap(2.06 KB)
📄 pcap_fileno.3pcap(2 KB)
📄 pcap_findalldevs.3pcap(6.25 KB)
📄 pcap_freecode.3pcap(1.67 KB)
📄 pcap_get_required_select_timeout.3pcap(3.04 KB)
📄 pcap_get_selectable_fd.3pcap(4.66 KB)
📄 pcap_get_tstamp_precision.3pcap.in(1.83 KB)
📄 pcap_geterr.3pcap(1.84 KB)
📄 pcap_inject.3pcap(3.34 KB)
📄 pcap_is_swapped.3pcap(1.91 KB)
📄 pcap_lib_version.3pcap(1.6 KB)
📄 pcap_list_datalinks.3pcap.in(2.54 KB)
📄 pcap_list_tstamp_types.3pcap.in(2.98 KB)
📄 pcap_lookupdev.3pcap(2.47 KB)
📄 pcap_lookupnet.3pcap(1.95 KB)
📄 pcap_loop.3pcap(6.58 KB)
📄 pcap_major_version.3pcap(1.96 KB)
📄 pcap_next_ex.3pcap(4.86 KB)
📄 pcap_offline_filter.3pcap(1.95 KB)
📄 pcap_open_dead.3pcap.in(2.65 KB)
📄 pcap_open_live.3pcap(2.65 KB)
📄 pcap_open_offline.3pcap.in(3.8 KB)
📄 pcap_set_buffer_size.3pcap(1.79 KB)
📄 pcap_set_datalink.3pcap(1.84 KB)
📄 pcap_set_immediate_mode.3pcap.in(3.27 KB)
📄 pcap_set_promisc.3pcap(1.82 KB)
📄 pcap_set_protocol_linux.3pcap(2.81 KB)
📄 pcap_set_rfmon.3pcap(1.82 KB)
📄 pcap_set_snaplen.3pcap(1.74 KB)
📄 pcap_set_timeout.3pcap(2.15 KB)
📄 pcap_set_tstamp_precision.3pcap.in(2.38 KB)
📄 pcap_set_tstamp_type.3pcap.in(2.73 KB)
📄 pcap_setdirection.3pcap(2.36 KB)
📄 pcap_setfilter.3pcap(1.79 KB)
📄 pcap_setnonblock.3pcap(2.82 KB)
📄 pcap_snapshot.3pcap(1.91 KB)
📄 pcap_stats.3pcap(3.35 KB)
📄 pcap_statustostr.3pcap(1.55 KB)
📄 pcap_strerror.3pcap(1.54 KB)
📄 pcap_tstamp_type_name_to_val.3pcap(1.87 KB)
📄 pcap_tstamp_type_val_to_name.3pcap(1.99 KB)
📄 portability.h(5.46 KB)
📄 ppp.h(2.62 KB)
📄 rpcap-protocol.c(6.67 KB)
📄 rpcap-protocol.h(18.61 KB)
📁 rpcapd
📄 savefile.c(13.72 KB)
📄 scanner.l(14.36 KB)
📄 sf-pcap.c(30.33 KB)
📄 sf-pcap.h(1.69 KB)
📄 sf-pcapng.c(38.9 KB)
📄 sf-pcapng.h(1.41 KB)
📄 sockutils.c(52.26 KB)
📄 sockutils.h(5.22 KB)
📄 sunatmpos.h(2.09 KB)
📁 testprogs
📁 tests
📄 varattrs.h(2.38 KB)

Editing: pcap-nit.c

/*
 * Copyright (c) 1990, 1991, 1992, 1993, 1994, 1995, 1996
 *	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.
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <sys/types.h>
#include <sys/time.h>
#include <sys/timeb.h>
#include <sys/file.h>
#include <sys/ioctl.h>
#include <sys/socket.h>

#include <net/if.h>
#include <net/nit.h>

#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <netinet/if_ether.h>
#include <netinet/ip_var.h>
#include <netinet/udp.h>
#include <netinet/udp_var.h>
#include <netinet/tcp.h>
#include <netinet/tcpip.h>

#include <ctype.h>
#include <errno.h>
#include <stdio.h>

#include "pcap-int.h"

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

/*
 * The chunk size for NIT.  This is the amount of buffering
 * done for read calls.
 */
#define CHUNKSIZE (2*1024)

/*
 * The total buffer space used by NIT.
 */
#define BUFSPACE (4*CHUNKSIZE)

/* Forwards */
static int nit_setflags(int, int, int, char *);

/*
 * Private data for capturing on NIT devices.
 */
struct pcap_nit {
	struct pcap_stat stat;
};

static int
pcap_stats_nit(pcap_t *p, struct pcap_stat *ps)
{
	struct pcap_nit *pn = p->priv;

/*
	 * "ps_recv" counts packets handed to the filter, not packets
	 * that passed the filter.  As filtering is done in userland,
	 * this does not include packets dropped because we ran out
	 * of buffer space.
	 *
	 * "ps_drop" presumably counts packets dropped by the socket
	 * because of flow control requirements or resource exhaustion;
	 * it doesn't count packets dropped by the interface driver.
	 * As filtering is done in userland, it counts packets regardless
	 * of whether they would've passed the filter.
	 *
	 * These statistics don't include packets not yet read from the
	 * kernel by libpcap or packets not yet read from libpcap by the
	 * application.
	 */
	*ps = pn->stat;
	return (0);
}

static int
pcap_read_nit(pcap_t *p, int cnt, pcap_handler callback, u_char *user)
{
	struct pcap_nit *pn = p->priv;
	register int cc, n;
	register u_char *bp, *cp, *ep;
	register struct nit_hdr *nh;
	register int caplen;

cc = p->cc;
	if (cc == 0) {
		cc = read(p->fd, (char *)p->buffer, p->bufsize);
		if (cc < 0) {
			if (errno == EWOULDBLOCK)
				return (0);
			pcap_fmt_errmsg_for_errno(p->errbuf, sizeof(p->errbuf),
			    errno, "pcap_read");
			return (-1);
		}
		bp = (u_char *)p->buffer;
	} else
		bp = p->bp;

/*
	 * Loop through each packet.  The increment expression
	 * rounds up to the next int boundary past the end of
	 * the previous packet.
	 */
	n = 0;
	ep = bp + cc;
	while (bp < ep) {
		/*
		 * Has "pcap_breakloop()" been called?
		 * If so, return immediately - if we haven't read any
		 * packets, clear the flag and return -2 to indicate
		 * that we were told to break out of the loop, otherwise
		 * leave the flag set, so that the *next* call will break
		 * out of the loop without having read any packets, and
		 * return the number of packets we've processed so far.
		 */
		if (p->break_loop) {
			if (n == 0) {
				p->break_loop = 0;
				return (-2);
			} else {
				p->cc = ep - bp;
				p->bp = bp;
				return (n);
			}
		}

nh = (struct nit_hdr *)bp;
		cp = bp + sizeof(*nh);

switch (nh->nh_state) {

case NIT_CATCH:
			break;

case NIT_NOMBUF:
		case NIT_NOCLUSTER:
		case NIT_NOSPACE:
			pn->stat.ps_drop = nh->nh_dropped;
			continue;

case NIT_SEQNO:
			continue;

default:
			pcap_snprintf(p->errbuf, sizeof(p->errbuf),
			    "bad nit state %d", nh->nh_state);
			return (-1);
		}
		++pn->stat.ps_recv;
		bp += ((sizeof(struct nit_hdr) + nh->nh_datalen +
		    sizeof(int) - 1) & ~(sizeof(int) - 1));

caplen = nh->nh_wirelen;
		if (caplen > p->snapshot)
			caplen = p->snapshot;
		if (bpf_filter(p->fcode.bf_insns, cp, nh->nh_wirelen, caplen)) {
			struct pcap_pkthdr h;
			h.ts = nh->nh_timestamp;
			h.len = nh->nh_wirelen;
			h.caplen = caplen;
			(*callback)(user, &h, cp);
			if (++n >= cnt && !PACKET_COUNT_IS_UNLIMITED(cnt)) {
				p->cc = ep - bp;
				p->bp = bp;
				return (n);
			}
		}
	}
	p->cc = 0;
	return (n);
}

static int
pcap_inject_nit(pcap_t *p, const void *buf, size_t size)
{
	struct sockaddr sa;
	int ret;

memset(&sa, 0, sizeof(sa));
	strncpy(sa.sa_data, device, sizeof(sa.sa_data));
	ret = sendto(p->fd, buf, size, 0, &sa, sizeof(sa));
	if (ret == -1) {
		pcap_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE,
		    errno, "send");
		return (-1);
	}
	return (ret);
}

static int
nit_setflags(pcap_t *p)
{
	struct nit_ioc nioc;

memset(&nioc, 0, sizeof(nioc));
	nioc.nioc_typetomatch = NT_ALLTYPES;
	nioc.nioc_snaplen = p->snapshot;
	nioc.nioc_bufalign = sizeof(int);
	nioc.nioc_bufoffset = 0;

if (p->opt.buffer_size != 0)
		nioc.nioc_bufspace = p->opt.buffer_size;
	else {
		/* Default buffer size */
		nioc.nioc_bufspace = BUFSPACE;
	}

if (p->opt.immediate) {
		/*
		 * XXX - will this cause packets to be delivered immediately?
		 * XXX - given that this is for SunOS prior to 4.0, do
		 * we care?
		 */
		nioc.nioc_chunksize = 0;
	} else
		nioc.nioc_chunksize = CHUNKSIZE;
	if (p->opt.timeout != 0) {
		nioc.nioc_flags |= NF_TIMEOUT;
		nioc.nioc_timeout.tv_sec = p->opt.timeout / 1000;
		nioc.nioc_timeout.tv_usec = (p->opt.timeout * 1000) % 1000000;
	}
	if (p->opt.promisc)
		nioc.nioc_flags |= NF_PROMISC;

if (ioctl(p->fd, SIOCSNIT, &nioc) < 0) {
		pcap_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE,
		    errno, "SIOCSNIT");
		return (-1);
	}
	return (0);
}

static int
pcap_activate_nit(pcap_t *p)
{
	int fd;
	struct sockaddr_nit snit;

if (p->opt.rfmon) {
		/*
		 * No monitor mode on SunOS 3.x or earlier (no
		 * Wi-Fi *devices* for the hardware that supported
		 * them!).
		 */
		return (PCAP_ERROR_RFMON_NOTSUP);
	}

/*
	 * Turn a negative snapshot value (invalid), a snapshot value of
	 * 0 (unspecified), or a value bigger than the normal maximum
	 * value, into the maximum allowed value.
	 *
	 * If some application really *needs* a bigger snapshot
	 * length, we should just increase MAXIMUM_SNAPLEN.
	 */
	if (p->snapshot <= 0 || p->snapshot > MAXIMUM_SNAPLEN)
		p->snapshot = MAXIMUM_SNAPLEN;

if (p->snapshot < 96)
		/*
		 * NIT requires a snapshot length of at least 96.
		 */
		p->snapshot = 96;

memset(p, 0, sizeof(*p));
	p->fd = fd = socket(AF_NIT, SOCK_RAW, NITPROTO_RAW);
	if (fd < 0) {
		pcap_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE,
		    errno, "socket");
		goto bad;
	}
	snit.snit_family = AF_NIT;
	(void)strncpy(snit.snit_ifname, p->opt.device, NITIFSIZ);

if (bind(fd, (struct sockaddr *)&snit, sizeof(snit))) {
		/*
		 * XXX - there's probably a particular bind error that
		 * means "there's no such device" and a particular bind
		 * error that means "that device doesn't support NIT";
		 * they might be the same error, if they both end up
		 * meaning "NIT doesn't know about that device".
		 */
		pcap_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE,
		    errno, "bind: %s", snit.snit_ifname);
		goto bad;
	}
	if (nit_setflags(p) < 0)
		goto bad;

/*
	 * NIT supports only ethernets.
	 */
	p->linktype = DLT_EN10MB;

p->bufsize = BUFSPACE;
	p->buffer = malloc(p->bufsize);
	if (p->buffer == NULL) {
		pcap_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE,
		    errno, "malloc");
		goto bad;
	}

/*
	 * "p->fd" is a socket, so "select()" should work on it.
	 */
	p->selectable_fd = p->fd;

/*
	 * This is (presumably) a real Ethernet capture; give it a
	 * link-layer-type list with DLT_EN10MB and DLT_DOCSIS, so
	 * that an application can let you choose it, in case you're
	 * capturing DOCSIS traffic that a Cisco Cable Modem
	 * Termination System is putting out onto an Ethernet (it
	 * doesn't put an Ethernet header onto the wire, it puts raw
	 * DOCSIS frames out on the wire inside the low-level
	 * Ethernet framing).
	 */
	p->dlt_list = (u_int *) malloc(sizeof(u_int) * 2);
	/*
	 * If that fails, just leave the list empty.
	 */
	if (p->dlt_list != NULL) {
		p->dlt_list[0] = DLT_EN10MB;
		p->dlt_list[1] = DLT_DOCSIS;
		p->dlt_count = 2;
	}

p->read_op = pcap_read_nit;
	p->inject_op = pcap_inject_nit;
	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_nit;

return (0);
 bad:
	pcap_cleanup_live_common(p);
	return (PCAP_ERROR);
}

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

p = pcap_create_common(ebuf, sizeof (struct pcap_nit));
	if (p == NULL)
		return (NULL);

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

/*
 * XXX - there's probably a particular bind error that means "that device
 * doesn't support NIT"; if so, we should try a bind and use that.
 */
static int
can_be_bound(const char *name _U_)
{
	return (1);
}

static int
get_if_flags(const char *name _U_, bpf_u_int32 *flags _U_, char *errbuf _U_)
{
	/*
	 * Nothing we can do.
	 * XXX - is there a way to find out whether an adapter has
	 * something plugged into it?
	 */
	return (0);
}

int
pcap_platform_finddevs(pcap_if_list_t *devlistp, char *errbuf)
{
	return (pcap_findalldevs_interfaces(devlistp, errbuf, can_be_bound,
	    get_if_flags));
}

/*
 * Libpcap version string.
 */
const char *
pcap_lib_version(void)
{
	return (PCAP_VERSION_STRING);
}

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Editing: pcap-nit.c

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