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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: extract.h

/*
 * Copyright (c) 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.
 */

#ifndef _WIN32
#include <arpa/inet.h>
#endif

#include <pcap/pcap-inttypes.h>
#include <pcap/compiler-tests.h>

/*
 * Macros to extract possibly-unaligned big-endian integral values.
 */
#ifdef LBL_ALIGN
/*
 * The processor doesn't natively handle unaligned loads.
 */
#if PCAP_IS_AT_LEAST_GNUC_VERSION(2,0) && \
    (defined(__alpha) || defined(__alpha__) || \
     defined(__mips) || defined(__mips__))
/*
 * This is MIPS or Alpha, which don't natively handle unaligned loads,
 * but which have instructions that can help when doing unaligned
 * loads, and this is GCC 2.0 or later or a compiler that claims to
 * be GCC 2.0 or later, which we assume that mean we have
 * __attribute__((packed)), which we can use to convince the compiler
 * to generate those instructions.
 *
 * Declare packed structures containing a uint16_t and a uint32_t,
 * cast the pointer to point to one of those, and fetch through it;
 * the GCC manual doesn't appear to explicitly say that
 * __attribute__((packed)) causes the compiler to generate unaligned-safe
 * code, but it apppears to do so.
 *
 * We do this in case the compiler can generate code using those
 * instructions to do an unaligned load and pass stuff to "ntohs()" or
 * "ntohl()", which might be better than than the code to fetch the
 * bytes one at a time and assemble them.  (That might not be the
 * case on a little-endian platform, such as DEC's MIPS machines and
 * Alpha machines, where "ntohs()" and "ntohl()" might not be done
 * inline.)
 *
 * We do this only for specific architectures because, for example,
 * at least some versions of GCC, when compiling for 64-bit SPARC,
 * generate code that assumes alignment if we do this.
 *
 * XXX - add other architectures and compilers as possible and
 * appropriate.
 *
 * HP's C compiler, indicated by __HP_cc being defined, supports
 * "#pragma unaligned N" in version A.05.50 and later, where "N"
 * specifies a number of bytes at which the typedef on the next
 * line is aligned, e.g.
 *
 *	#pragma unalign 1
 *	typedef uint16_t unaligned_uint16_t;
 *
 * to define unaligned_uint16_t as a 16-bit unaligned data type.
 * This could be presumably used, in sufficiently recent versions of
 * the compiler, with macros similar to those below.  This would be
 * useful only if that compiler could generate better code for PA-RISC
 * or Itanium than would be generated by a bunch of shifts-and-ORs.
 *
 * DEC C, indicated by __DECC being defined, has, at least on Alpha,
 * an __unaligned qualifier that can be applied to pointers to get the
 * compiler to generate code that does unaligned loads and stores when
 * dereferencing the pointer in question.
 *
 * XXX - what if the native C compiler doesn't support
 * __attribute__((packed))?  How can we get it to generate unaligned
 * accesses for *specific* items?
 */
typedef struct {
	uint16_t	val;
} __attribute__((packed)) unaligned_uint16_t;

typedef struct {
	uint32_t	val;
} __attribute__((packed)) unaligned_uint32_t;

static inline uint16_t
EXTRACT_16BITS(const void *p)
{
	return ((uint16_t)ntohs(((const unaligned_uint16_t *)(p))->val));
}

static inline uint32_t
EXTRACT_32BITS(const void *p)
{
	return ((uint32_t)ntohl(((const unaligned_uint32_t *)(p))->val));
}

static inline uint64_t
EXTRACT_64BITS(const void *p)
{
	return ((uint64_t)(((uint64_t)ntohl(((const unaligned_uint32_t *)(p) + 0)->val)) << 32 | \
		((uint64_t)ntohl(((const unaligned_uint32_t *)(p) + 1)->val)) << 0));
}

#else /* have to do it a byte at a time */
/*
 * This isn't a GCC-compatible compiler, we don't have __attribute__,
 * or we do but we don't know of any better way with this instruction
 * set to do unaligned loads, so do unaligned loads of big-endian
 * quantities the hard way - fetch the bytes one at a time and
 * assemble them.
 */
#define EXTRACT_16BITS(p) \
	((uint16_t)(((uint16_t)(*((const uint8_t *)(p) + 0)) << 8) | \
	            ((uint16_t)(*((const uint8_t *)(p) + 1)) << 0)))
#define EXTRACT_32BITS(p) \
	((uint32_t)(((uint32_t)(*((const uint8_t *)(p) + 0)) << 24) | \
	            ((uint32_t)(*((const uint8_t *)(p) + 1)) << 16) | \
	            ((uint32_t)(*((const uint8_t *)(p) + 2)) << 8) | \
	            ((uint32_t)(*((const uint8_t *)(p) + 3)) << 0)))
#define EXTRACT_64BITS(p) \
	((uint64_t)(((uint64_t)(*((const uint8_t *)(p) + 0)) << 56) | \
	            ((uint64_t)(*((const uint8_t *)(p) + 1)) << 48) | \
	            ((uint64_t)(*((const uint8_t *)(p) + 2)) << 40) | \
	            ((uint64_t)(*((const uint8_t *)(p) + 3)) << 32) | \
	            ((uint64_t)(*((const uint8_t *)(p) + 4)) << 24) | \
	            ((uint64_t)(*((const uint8_t *)(p) + 5)) << 16) | \
	            ((uint64_t)(*((const uint8_t *)(p) + 6)) << 8) | \
	            ((uint64_t)(*((const uint8_t *)(p) + 7)) << 0)))
#endif /* must special-case unaligned accesses */
#else /* LBL_ALIGN */
/*
 * The processor natively handles unaligned loads, so we can just
 * cast the pointer and fetch through it.
 */
static inline uint16_t
EXTRACT_16BITS(const void *p)
{
	return ((uint16_t)ntohs(*(const uint16_t *)(p)));
}

static inline uint32_t
EXTRACT_32BITS(const void *p)
{
	return ((uint32_t)ntohl(*(const uint32_t *)(p)));
}

static inline uint64_t
EXTRACT_64BITS(const void *p)
{
	return ((uint64_t)(((uint64_t)ntohl(*((const uint32_t *)(p) + 0))) << 32 | \
		((uint64_t)ntohl(*((const uint32_t *)(p) + 1))) << 0));

}

#endif /* LBL_ALIGN */

#define EXTRACT_24BITS(p) \
	((uint32_t)(((uint32_t)(*((const uint8_t *)(p) + 0)) << 16) | \
	            ((uint32_t)(*((const uint8_t *)(p) + 1)) << 8) | \
	            ((uint32_t)(*((const uint8_t *)(p) + 2)) << 0)))

#define EXTRACT_40BITS(p) \
	((uint64_t)(((uint64_t)(*((const uint8_t *)(p) + 0)) << 32) | \
	            ((uint64_t)(*((const uint8_t *)(p) + 1)) << 24) | \
	            ((uint64_t)(*((const uint8_t *)(p) + 2)) << 16) | \
	            ((uint64_t)(*((const uint8_t *)(p) + 3)) << 8) | \
	            ((uint64_t)(*((const uint8_t *)(p) + 4)) << 0)))

#define EXTRACT_48BITS(p) \
	((uint64_t)(((uint64_t)(*((const uint8_t *)(p) + 0)) << 40) | \
	            ((uint64_t)(*((const uint8_t *)(p) + 1)) << 32) | \
	            ((uint64_t)(*((const uint8_t *)(p) + 2)) << 24) | \
	            ((uint64_t)(*((const uint8_t *)(p) + 3)) << 16) | \
	            ((uint64_t)(*((const uint8_t *)(p) + 4)) << 8) | \
	            ((uint64_t)(*((const uint8_t *)(p) + 5)) << 0)))

#define EXTRACT_56BITS(p) \
	((uint64_t)(((uint64_t)(*((const uint8_t *)(p) + 0)) << 48) | \
	            ((uint64_t)(*((const uint8_t *)(p) + 1)) << 40) | \
	            ((uint64_t)(*((const uint8_t *)(p) + 2)) << 32) | \
	            ((uint64_t)(*((const uint8_t *)(p) + 3)) << 24) | \
	            ((uint64_t)(*((const uint8_t *)(p) + 4)) << 16) | \
	            ((uint64_t)(*((const uint8_t *)(p) + 5)) << 8) | \
	            ((uint64_t)(*((const uint8_t *)(p) + 6)) << 0)))

/*
 * Macros to extract possibly-unaligned little-endian integral values.
 * XXX - do loads on little-endian machines that support unaligned loads?
 */
#define EXTRACT_LE_8BITS(p) (*(p))
#define EXTRACT_LE_16BITS(p) \
	((uint16_t)(((uint16_t)(*((const uint8_t *)(p) + 1)) << 8) | \
	            ((uint16_t)(*((const uint8_t *)(p) + 0)) << 0)))
#define EXTRACT_LE_32BITS(p) \
	((uint32_t)(((uint32_t)(*((const uint8_t *)(p) + 3)) << 24) | \
	            ((uint32_t)(*((const uint8_t *)(p) + 2)) << 16) | \
	            ((uint32_t)(*((const uint8_t *)(p) + 1)) << 8) | \
	            ((uint32_t)(*((const uint8_t *)(p) + 0)) << 0)))
#define EXTRACT_LE_24BITS(p) \
	((uint32_t)(((uint32_t)(*((const uint8_t *)(p) + 2)) << 16) | \
	            ((uint32_t)(*((const uint8_t *)(p) + 1)) << 8) | \
	            ((uint32_t)(*((const uint8_t *)(p) + 0)) << 0)))
#define EXTRACT_LE_64BITS(p) \
	((uint64_t)(((uint64_t)(*((const uint8_t *)(p) + 7)) << 56) | \
	            ((uint64_t)(*((const uint8_t *)(p) + 6)) << 48) | \
	            ((uint64_t)(*((const uint8_t *)(p) + 5)) << 40) | \
	            ((uint64_t)(*((const uint8_t *)(p) + 4)) << 32) | \
	            ((uint64_t)(*((const uint8_t *)(p) + 3)) << 24) | \
	            ((uint64_t)(*((const uint8_t *)(p) + 2)) << 16) | \
	            ((uint64_t)(*((const uint8_t *)(p) + 1)) << 8) | \
	            ((uint64_t)(*((const uint8_t *)(p) + 0)) << 0)))

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Editing: extract.h

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