mirror of
https://github.com/nmap/nmap.git
synced 2026-01-03 05:09:14 +00:00
Update included libpcap to 1.10.1
This commit is contained in:
dmiller
@@ -25,15 +25,94 @@
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#include <pcap/pcap-inttypes.h>
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#include <pcap/compiler-tests.h>
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#include "portability.h"
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/*
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* Macros to extract possibly-unaligned big-endian integral values.
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* If we have versions of GCC or Clang that support an __attribute__
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* to say "if we're building with unsigned behavior sanitization,
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* don't complain about undefined behavior in this function", we
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* label these functions with that attribute - we *know* it's undefined
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* in the C standard, but we *also* know it does what we want with
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* the ISA we're targeting and the compiler we're using.
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*
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* For GCC 4.9.0 and later, we use __attribute__((no_sanitize_undefined));
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* pre-5.0 GCC doesn't have __has_attribute, and I'm not sure whether
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* GCC or Clang first had __attribute__((no_sanitize(XXX)).
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*
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* For Clang, we check for __attribute__((no_sanitize(XXX)) with
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* __has_attribute, as there are versions of Clang that support
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* __attribute__((no_sanitize("undefined")) but don't support
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* __attribute__((no_sanitize_undefined)).
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*
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* We define this here, rather than in funcattrs.h, because we
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* only want it used here, we don't want it to be broadly used.
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* (Any printer will get this defined, but this should at least
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* make it harder for people to find.)
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*/
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#ifdef LBL_ALIGN
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#if defined(__GNUC__) && ((__GNUC__ * 100 + __GNUC_MINOR__) >= 409)
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#define UNALIGNED_OK __attribute__((no_sanitize_undefined))
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#elif __has_attribute(no_sanitize)
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#define UNALIGNED_OK __attribute__((no_sanitize("undefined")))
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#else
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#define UNALIGNED_OK
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#endif
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#if (defined(__i386__) || defined(_M_IX86) || defined(__X86__) || defined(__x86_64__) || defined(_M_X64)) || \
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(defined(__m68k__) && (!defined(__mc68000__) && !defined(__mc68010__))) || \
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(defined(__ppc__) || defined(__ppc64__) || defined(_M_PPC) || defined(_ARCH_PPC) || defined(_ARCH_PPC64)) || \
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(defined(__s390__) || defined(__s390x__) || defined(__zarch__))
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/*
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* The processor doesn't natively handle unaligned loads.
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* The processor natively handles unaligned loads, so we can just
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* cast the pointer and fetch through it.
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*
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* XXX - are those all the x86 tests we need?
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* XXX - are those the only 68k tests we need not to generated
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* unaligned accesses if the target is the 68000 or 68010?
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* XXX - are there any tests we don't need, because some definitions are for
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* compilers that also predefine the GCC symbols?
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* XXX - do we need to test for both 32-bit and 64-bit versions of those
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* architectures in all cases?
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*/
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#if PCAP_IS_AT_LEAST_GNUC_VERSION(2,0) && \
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UNALIGNED_OK static inline uint16_t
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EXTRACT_BE_U_2(const void *p)
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{
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return ((uint16_t)ntohs(*(const uint16_t *)(p)));
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}
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UNALIGNED_OK static inline int16_t
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EXTRACT_BE_S_2(const void *p)
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{
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return ((int16_t)ntohs(*(const int16_t *)(p)));
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}
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UNALIGNED_OK static inline uint32_t
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EXTRACT_BE_U_4(const void *p)
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{
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return ((uint32_t)ntohl(*(const uint32_t *)(p)));
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}
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UNALIGNED_OK static inline int32_t
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EXTRACT_BE_S_4(const void *p)
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{
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return ((int32_t)ntohl(*(const int32_t *)(p)));
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}
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UNALIGNED_OK static inline uint64_t
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EXTRACT_BE_U_8(const void *p)
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{
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return ((uint64_t)(((uint64_t)ntohl(*((const uint32_t *)(p) + 0))) << 32 |
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((uint64_t)ntohl(*((const uint32_t *)(p) + 1))) << 0));
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}
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UNALIGNED_OK static inline int64_t
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EXTRACT_BE_S_8(const void *p)
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{
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return ((int64_t)(((int64_t)ntohl(*((const uint32_t *)(p) + 0))) << 32 |
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((uint64_t)ntohl(*((const uint32_t *)(p) + 1))) << 0));
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}
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#elif PCAP_IS_AT_LEAST_GNUC_VERSION(2,0) && \
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(defined(__alpha) || defined(__alpha__) || \
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defined(__mips) || defined(__mips__))
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/*
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@@ -52,7 +131,7 @@
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*
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* We do this in case the compiler can generate code using those
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* instructions to do an unaligned load and pass stuff to "ntohs()" or
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* "ntohl()", which might be better than than the code to fetch the
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* "ntohl()", which might be better than the code to fetch the
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* bytes one at a time and assemble them. (That might not be the
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* case on a little-endian platform, such as DEC's MIPS machines and
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* Alpha machines, where "ntohs()" and "ntohl()" might not be done
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@@ -92,46 +171,91 @@ typedef struct {
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uint16_t val;
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} __attribute__((packed)) unaligned_uint16_t;
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typedef struct {
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int16_t val;
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} __attribute__((packed)) unaligned_int16_t;
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typedef struct {
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uint32_t val;
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} __attribute__((packed)) unaligned_uint32_t;
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static inline uint16_t
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EXTRACT_16BITS(const void *p)
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typedef struct {
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int32_t val;
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} __attribute__((packed)) unaligned_int32_t;
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UNALIGNED_OK static inline uint16_t
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EXTRACT_BE_U_2(const void *p)
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{
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return ((uint16_t)ntohs(((const unaligned_uint16_t *)(p))->val));
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}
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static inline uint32_t
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EXTRACT_32BITS(const void *p)
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UNALIGNED_OK static inline int16_t
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EXTRACT_BE_S_2(const void *p)
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{
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return ((int16_t)ntohs(((const unaligned_int16_t *)(p))->val));
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}
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UNALIGNED_OK static inline uint32_t
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EXTRACT_BE_U_4(const void *p)
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{
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return ((uint32_t)ntohl(((const unaligned_uint32_t *)(p))->val));
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}
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static inline uint64_t
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EXTRACT_64BITS(const void *p)
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UNALIGNED_OK static inline int32_t
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EXTRACT_BE_S_4(const void *p)
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{
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return ((uint64_t)(((uint64_t)ntohl(((const unaligned_uint32_t *)(p) + 0)->val)) << 32 | \
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return ((int32_t)ntohl(((const unaligned_int32_t *)(p))->val));
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}
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UNALIGNED_OK static inline uint64_t
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EXTRACT_BE_U_8(const void *p)
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{
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return ((uint64_t)(((uint64_t)ntohl(((const unaligned_uint32_t *)(p) + 0)->val)) << 32 |
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((uint64_t)ntohl(((const unaligned_uint32_t *)(p) + 1)->val)) << 0));
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}
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#else /* have to do it a byte at a time */
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UNALIGNED_OK static inline int64_t
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EXTRACT_BE_S_8(const void *p)
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{
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return ((int64_t)(((uint64_t)ntohl(((const unaligned_uint32_t *)(p) + 0)->val)) << 32 |
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((uint64_t)ntohl(((const unaligned_uint32_t *)(p) + 1)->val)) << 0));
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}
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#else
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/*
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* This isn't a GCC-compatible compiler, we don't have __attribute__,
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* This architecture doesn't natively support unaligned loads, and either
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* this isn't a GCC-compatible compiler, we don't have __attribute__,
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* or we do but we don't know of any better way with this instruction
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* set to do unaligned loads, so do unaligned loads of big-endian
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* quantities the hard way - fetch the bytes one at a time and
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* assemble them.
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*
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* XXX - ARM is a special case. ARMv1 through ARMv5 didn't suppory
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* unaligned loads; ARMv6 and later support it *but* have a bit in
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* the system control register that the OS can set and that causes
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* unaligned loads to fault rather than succeeding.
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*
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* At least some OSes may set that flag, so we do *not* treat ARM
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* as supporting unaligned loads. If your OS supports them on ARM,
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* and you want to use them, please update the tests in the #if above
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* to check for ARM *and* for your OS.
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*/
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#define EXTRACT_16BITS(p) \
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#define EXTRACT_BE_U_2(p) \
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((uint16_t)(((uint16_t)(*((const uint8_t *)(p) + 0)) << 8) | \
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((uint16_t)(*((const uint8_t *)(p) + 1)) << 0)))
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#define EXTRACT_32BITS(p) \
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#define EXTRACT_BE_S_2(p) \
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((int16_t)(((uint16_t)(*((const uint8_t *)(p) + 0)) << 8) | \
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((uint16_t)(*((const uint8_t *)(p) + 1)) << 0)))
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#define EXTRACT_BE_U_4(p) \
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((uint32_t)(((uint32_t)(*((const uint8_t *)(p) + 0)) << 24) | \
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((uint32_t)(*((const uint8_t *)(p) + 1)) << 16) | \
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((uint32_t)(*((const uint8_t *)(p) + 2)) << 8) | \
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((uint32_t)(*((const uint8_t *)(p) + 3)) << 0)))
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#define EXTRACT_64BITS(p) \
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#define EXTRACT_BE_S_4(p) \
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((int32_t)(((uint32_t)(*((const uint8_t *)(p) + 0)) << 24) | \
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((uint32_t)(*((const uint8_t *)(p) + 1)) << 16) | \
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((uint32_t)(*((const uint8_t *)(p) + 2)) << 8) | \
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((uint32_t)(*((const uint8_t *)(p) + 3)) << 0)))
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#define EXTRACT_BE_U_8(p) \
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((uint64_t)(((uint64_t)(*((const uint8_t *)(p) + 0)) << 56) | \
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((uint64_t)(*((const uint8_t *)(p) + 1)) << 48) | \
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((uint64_t)(*((const uint8_t *)(p) + 2)) << 40) | \
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@@ -140,47 +264,67 @@ EXTRACT_64BITS(const void *p)
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((uint64_t)(*((const uint8_t *)(p) + 5)) << 16) | \
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((uint64_t)(*((const uint8_t *)(p) + 6)) << 8) | \
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((uint64_t)(*((const uint8_t *)(p) + 7)) << 0)))
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#endif /* must special-case unaligned accesses */
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#else /* LBL_ALIGN */
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#define EXTRACT_BE_S_8(p) \
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((int64_t)(((uint64_t)(*((const uint8_t *)(p) + 0)) << 56) | \
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((uint64_t)(*((const uint8_t *)(p) + 1)) << 48) | \
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((uint64_t)(*((const uint8_t *)(p) + 2)) << 40) | \
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((uint64_t)(*((const uint8_t *)(p) + 3)) << 32) | \
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((uint64_t)(*((const uint8_t *)(p) + 4)) << 24) | \
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((uint64_t)(*((const uint8_t *)(p) + 5)) << 16) | \
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((uint64_t)(*((const uint8_t *)(p) + 6)) << 8) | \
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((uint64_t)(*((const uint8_t *)(p) + 7)) << 0)))
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/*
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* The processor natively handles unaligned loads, so we can just
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* cast the pointer and fetch through it.
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* Extract an IPv4 address, which is in network byte order, and not
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* necessarily aligned, and provide the result in host byte order.
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*/
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static inline uint16_t
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EXTRACT_16BITS(const void *p)
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{
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return ((uint16_t)ntohs(*(const uint16_t *)(p)));
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}
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#define EXTRACT_IPV4_TO_HOST_ORDER(p) \
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((uint32_t)(((uint32_t)(*((const uint8_t *)(p) + 0)) << 24) | \
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((uint32_t)(*((const uint8_t *)(p) + 1)) << 16) | \
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((uint32_t)(*((const uint8_t *)(p) + 2)) << 8) | \
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((uint32_t)(*((const uint8_t *)(p) + 3)) << 0)))
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#endif /* unaligned access checks */
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static inline uint32_t
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EXTRACT_32BITS(const void *p)
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{
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return ((uint32_t)ntohl(*(const uint32_t *)(p)));
|
||||
}
|
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|
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static inline uint64_t
|
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EXTRACT_64BITS(const void *p)
|
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{
|
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return ((uint64_t)(((uint64_t)ntohl(*((const uint32_t *)(p) + 0))) << 32 | \
|
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((uint64_t)ntohl(*((const uint32_t *)(p) + 1))) << 0));
|
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|
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}
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|
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#endif /* LBL_ALIGN */
|
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|
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#define EXTRACT_24BITS(p) \
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/*
|
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* Non-power-of-2 sizes.
|
||||
*/
|
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#define EXTRACT_BE_U_3(p) \
|
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((uint32_t)(((uint32_t)(*((const uint8_t *)(p) + 0)) << 16) | \
|
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((uint32_t)(*((const uint8_t *)(p) + 1)) << 8) | \
|
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((uint32_t)(*((const uint8_t *)(p) + 2)) << 0)))
|
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#define EXTRACT_40BITS(p) \
|
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#define EXTRACT_BE_S_3(p) \
|
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(((*((const uint8_t *)(p) + 0)) & 0x80) ? \
|
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((int32_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))) : \
|
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((int32_t)(0xFF000000U | \
|
||||
((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_BE_U_5(p) \
|
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((uint64_t)(((uint64_t)(*((const uint8_t *)(p) + 0)) << 32) | \
|
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((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) \
|
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#define EXTRACT_BE_S_5(p) \
|
||||
(((*((const uint8_t *)(p) + 0)) & 0x80) ? \
|
||||
((int64_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))) : \
|
||||
((int64_t)(INT64_T_CONSTANT(0xFFFFFF0000000000U) | \
|
||||
((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_BE_U_6(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) | \
|
||||
@@ -188,7 +332,23 @@ EXTRACT_64BITS(const void *p)
|
||||
((uint64_t)(*((const uint8_t *)(p) + 4)) << 8) | \
|
||||
((uint64_t)(*((const uint8_t *)(p) + 5)) << 0)))
|
||||
|
||||
#define EXTRACT_56BITS(p) \
|
||||
#define EXTRACT_BE_S_6(p) \
|
||||
(((*((const uint8_t *)(p) + 0)) & 0x80) ? \
|
||||
((int64_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))) : \
|
||||
((int64_t)(INT64_T_CONSTANT(0xFFFFFFFF00000000U) | \
|
||||
((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_BE_U_7(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) | \
|
||||
@@ -197,24 +357,53 @@ EXTRACT_64BITS(const void *p)
|
||||
((uint64_t)(*((const uint8_t *)(p) + 5)) << 8) | \
|
||||
((uint64_t)(*((const uint8_t *)(p) + 6)) << 0)))
|
||||
|
||||
#define EXTRACT_BE_S_7(p) \
|
||||
(((*((const uint8_t *)(p) + 0)) & 0x80) ? \
|
||||
((int64_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))) : \
|
||||
((int64_t)(INT64_T_CONSTANT(0xFFFFFFFFFF000000U) | \
|
||||
((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) \
|
||||
#define EXTRACT_LE_U_2(p) \
|
||||
((uint16_t)(((uint16_t)(*((const uint8_t *)(p) + 1)) << 8) | \
|
||||
((uint16_t)(*((const uint8_t *)(p) + 0)) << 0)))
|
||||
#define EXTRACT_LE_32BITS(p) \
|
||||
#define EXTRACT_LE_S_2(p) \
|
||||
((int16_t)(((uint16_t)(*((const uint8_t *)(p) + 1)) << 8) | \
|
||||
((uint16_t)(*((const uint8_t *)(p) + 0)) << 0)))
|
||||
#define EXTRACT_LE_U_4(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) \
|
||||
#define EXTRACT_LE_S_4(p) \
|
||||
((int32_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_U_3(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) \
|
||||
#define EXTRACT_LE_S_3(p) \
|
||||
((int32_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_U_8(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) | \
|
||||
@@ -223,3 +412,12 @@ EXTRACT_64BITS(const void *p)
|
||||
((uint64_t)(*((const uint8_t *)(p) + 2)) << 16) | \
|
||||
((uint64_t)(*((const uint8_t *)(p) + 1)) << 8) | \
|
||||
((uint64_t)(*((const uint8_t *)(p) + 0)) << 0)))
|
||||
#define EXTRACT_LE_S_8(p) \
|
||||
((int64_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)))
|
||||
|
||||
Reference in New Issue
Block a user