mirror of
https://github.com/the-tcpdump-group/tcpdump.git
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eeabdc9b78
At least some versions of GCC will, on SPARC, generate code for
if (bp->bp_htype == 1 && bp->bp_hlen == 6 && bp->bp_op == BOOTPREQUEST) {
where bp is a pointer to a struct bootp, that loads the first 4-byte
word in that structure, masks out the field in that structure that's not
being compared, and compares against a word with the appropriate values
in the other fields. That won't work, because there's no guarantee that
bp points to a value aligned on a 4-byte boundary.
Declaring "struct bootp" to be packed appears to keep at least GCC 4.2.4
from performing that optimization; we define an "UNALIGNED" tag to apply
to structures to prevent that optimization, and apply that tag to the
structures in bootp.h. (We'll apply it to other structures as we
discover the need for it.)
425 lines
18 KiB
C
425 lines
18 KiB
C
/*
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* Copyright (c) 1988-2002
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that: (1) source code distributions
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* retain the above copyright notice and this paragraph in its entirety, (2)
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* distributions including binary code include the above copyright notice and
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* this paragraph in its entirety in the documentation or other materials
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* provided with the distribution, and (3) all advertising materials mentioning
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* features or use of this software display the following acknowledgement:
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* ``This product includes software developed by the University of California,
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* Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
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* the University nor the names of its contributors may be used to endorse
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* or promote products derived from this software without specific prior
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* written permission.
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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*
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* @(#) $Header: /tcpdump/master/tcpdump/interface.h,v 1.285 2008-08-16 11:36:20 hannes Exp $ (LBL)
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*/
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#ifndef tcpdump_interface_h
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#define tcpdump_interface_h
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#ifdef HAVE_OS_PROTO_H
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#include "os-proto.h"
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#endif
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#ifndef HAVE___ATTRIBUTE__
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#define __attribute__(x)
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#endif
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/*
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* Used to declare a structure unaligned, so that the C compiler,
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* if necessary, generates code that doesn't assume alignment.
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* This is required because there is no guarantee that the packet
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* data we get from libpcap/WinPcap is properly aligned.
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*
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* This assumes that, for all compilers that support __attribute__:
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*
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* 1) they support __attribute__((packed));
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*
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* 2) for all instruction set architectures requiring strict
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* alignment, declaring a structure with that attribute
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* causes the compiler to generate code that handles
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* misaligned 2-byte, 4-byte, and 8-byte integral
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* quantities.
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*
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* It does not (yet) handle compilers where you can get the compiler
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* to generate code of that sort by some other means.
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*
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* This is required in order to, for example, keep the compiler from
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* generating, for
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*
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* if (bp->bp_htype == 1 && bp->bp_hlen == 6 && bp->bp_op == BOOTPREQUEST) {
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*
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* in print-bootp.c, code that loads the first 4-byte word of a
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* "struct bootp", masking out the bp_hops field, and comparing the result
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* against 0x01010600.
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*
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* Note: this also requires that padding be put into the structure,
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* at least for compilers where it's implemented as __attribute__((packed)).
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*/
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#define UNALIGNED __attribute__((packed))
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/* snprintf et al */
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#include <stdarg.h>
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#if HAVE_STDINT_H
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#include <stdint.h>
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#endif
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#if !defined(HAVE_SNPRINTF)
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int snprintf(char *, size_t, const char *, ...)
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__attribute__((format(printf, 3, 4)));
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#endif
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#if !defined(HAVE_VSNPRINTF)
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int vsnprintf(char *, size_t, const char *, va_list)
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__attribute__((format(printf, 3, 0)));
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#endif
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#ifndef HAVE_STRLCAT
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extern size_t strlcat(char *, const char *, size_t);
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#endif
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#ifndef HAVE_STRLCPY
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extern size_t strlcpy(char *, const char *, size_t);
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#endif
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#ifndef HAVE_STRDUP
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extern char *strdup(const char *);
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#endif
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#ifndef HAVE_STRSEP
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extern char *strsep(char **, const char *);
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#endif
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#define PT_VAT 1 /* Visual Audio Tool */
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#define PT_WB 2 /* distributed White Board */
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#define PT_RPC 3 /* Remote Procedure Call */
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#define PT_RTP 4 /* Real-Time Applications protocol */
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#define PT_RTCP 5 /* Real-Time Applications control protocol */
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#define PT_SNMP 6 /* Simple Network Management Protocol */
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#define PT_CNFP 7 /* Cisco NetFlow protocol */
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#define PT_TFTP 8 /* trivial file transfer protocol */
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#define PT_AODV 9 /* Ad-hoc On-demand Distance Vector Protocol */
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#ifndef min
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#define min(a,b) ((a)>(b)?(b):(a))
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#endif
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#ifndef max
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#define max(a,b) ((b)>(a)?(b):(a))
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#endif
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#define ESRC(ep) ((ep)->ether_shost)
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#define EDST(ep) ((ep)->ether_dhost)
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#ifndef NTOHL
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#define NTOHL(x) (x) = ntohl(x)
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#define NTOHS(x) (x) = ntohs(x)
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#define HTONL(x) (x) = htonl(x)
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#define HTONS(x) (x) = htons(x)
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#endif
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#endif
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#ifndef MIN
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#define MIN(a,b) ((a)<(b)?(a):(b))
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#endif
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extern char *program_name; /* used to generate self-identifying messages */
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extern int32_t thiszone; /* seconds offset from gmt to local time */
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/*
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* True if "l" bytes of "var" were captured.
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*
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* The "snapend - (l) <= snapend" checks to make sure "l" isn't so large
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* that "snapend - (l)" underflows.
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*
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* The check is for <= rather than < because "l" might be 0.
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*/
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#define TTEST2(var, l) (snapend - (l) <= snapend && \
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(const u_char *)&(var) <= snapend - (l))
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/* True if "var" was captured */
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#define TTEST(var) TTEST2(var, sizeof(var))
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/* Bail if "l" bytes of "var" were not captured */
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#define TCHECK2(var, l) if (!TTEST2(var, l)) goto trunc
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/* Bail if "var" was not captured */
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#define TCHECK(var) TCHECK2(var, sizeof(var))
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extern void ts_print(const struct timeval *);
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extern void relts_print(int);
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extern int fn_print(const u_char *, const u_char *);
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extern int fn_printn(const u_char *, u_int, const u_char *);
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extern int fn_printzp(const u_char *, u_int, const u_char *);
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extern int mask2plen(u_int32_t);
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extern const char *tok2strary_internal(const char **, int, const char *, int);
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#define tok2strary(a,f,i) tok2strary_internal(a, sizeof(a)/sizeof(a[0]),f,i)
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extern const char *dnaddr_string(u_short);
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extern void error(const char *, ...)
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__attribute__((noreturn, format (printf, 1, 2)));
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extern void warning(const char *, ...) __attribute__ ((format (printf, 1, 2)));
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extern char *read_infile(char *);
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extern char *copy_argv(char **);
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extern void safeputchar(int);
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extern void safeputs(const char *, int);
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extern const char *isonsap_string(const u_char *, register u_int);
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extern const char *protoid_string(const u_char *);
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extern const char *ipxsap_string(u_short);
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extern const char *dnname_string(u_short);
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extern const char *dnnum_string(u_short);
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/* checksum routines */
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extern void init_checksum(void);
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extern u_int16_t verify_crc10_cksum(u_int16_t, const u_char *, int);
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extern u_int16_t create_osi_cksum(const u_int8_t *, int, int);
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/* The printer routines. */
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#include <pcap.h>
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extern int print_unknown_data(const u_char *, const char *,int);
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extern void ascii_print(const u_char *, u_int);
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extern void hex_and_ascii_print_with_offset(const char *, const u_char *,
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u_int, u_int);
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extern void hex_and_ascii_print(const char *, const u_char *, u_int);
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extern void hex_print_with_offset(const char *, const u_char *, u_int, u_int);
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extern void hex_print(const char *, const u_char *, u_int);
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extern void telnet_print(const u_char *, u_int);
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extern int ethertype_print(u_short, const u_char *, u_int, u_int);
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extern int llc_print(const u_char *, u_int, u_int, const u_char *,
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const u_char *, u_short *);
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extern int snap_print(const u_char *, u_int, u_int, u_int);
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extern void aarp_print(const u_char *, u_int);
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extern void aodv_print(const u_char *, u_int, int);
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extern void atalk_print(const u_char *, u_int);
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extern void atm_print(u_int, u_int, u_int, const u_char *, u_int, u_int);
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extern u_int atm_if_print(const struct pcap_pkthdr *, const u_char *);
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extern u_int sunatm_if_print(const struct pcap_pkthdr *, const u_char *);
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extern int oam_print(const u_char *, u_int, u_int);
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extern void bootp_print(const u_char *, u_int);
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extern void bgp_print(const u_char *, int);
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extern void beep_print(const u_char *, u_int);
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extern void cnfp_print(const u_char *, const u_char *);
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extern void decnet_print(const u_char *, u_int, u_int);
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extern void default_print(const u_char *, u_int);
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extern void dvmrp_print(const u_char *, u_int);
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extern void egp_print(const u_char *, u_int);
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extern u_int enc_if_print(const struct pcap_pkthdr *, const u_char *);
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extern u_int pflog_if_print(const struct pcap_pkthdr *, const u_char *);
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extern u_int arcnet_if_print(const struct pcap_pkthdr *, const u_char *);
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extern u_int arcnet_linux_if_print(const struct pcap_pkthdr *, const u_char *);
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extern void ether_print(const u_char *, u_int, u_int,
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void (*)(const u_char *), const u_char *);
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extern u_int ether_if_print(const struct pcap_pkthdr *, const u_char *);
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extern u_int token_print(const u_char *, u_int, u_int);
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extern u_int token_if_print(const struct pcap_pkthdr *, const u_char *);
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extern void fddi_print(const u_char *, u_int, u_int);
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extern u_int fddi_if_print(const struct pcap_pkthdr *, const u_char *);
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extern u_int fr_if_print(const struct pcap_pkthdr *, const u_char *);
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extern u_int mfr_if_print(const struct pcap_pkthdr *, const u_char *);
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extern u_int fr_print(register const u_char *, u_int);
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extern u_int mfr_print(register const u_char *, u_int);
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extern char *q922_string(const u_char *);
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extern u_int ieee802_11_if_print(const struct pcap_pkthdr *, const u_char *);
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extern u_int ieee802_11_radio_if_print(const struct pcap_pkthdr *,
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const u_char *);
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extern u_int ap1394_if_print(const struct pcap_pkthdr *, const u_char *);
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extern u_int ieee802_11_radio_avs_if_print(const struct pcap_pkthdr *,
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const u_char *);
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extern void gre_print(const u_char *, u_int);
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extern void icmp_print(const u_char *, u_int, const u_char *, int);
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extern void igmp_print(const u_char *, u_int);
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extern void igrp_print(const u_char *, u_int, const u_char *);
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extern void ipN_print(const u_char *, u_int);
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extern u_int ipfc_if_print(const struct pcap_pkthdr *, const u_char *);
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extern void ipx_print(const u_char *, u_int);
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extern void isoclns_print(const u_char *, u_int, u_int);
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extern void krb_print(const u_char *);
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extern u_int llap_print(const u_char *, u_int);
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extern u_int ltalk_if_print(const struct pcap_pkthdr *, const u_char *);
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extern void msdp_print(const unsigned char *, u_int);
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extern void nfsreply_print(const u_char *, u_int, const u_char *);
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extern void nfsreq_print(const u_char *, u_int, const u_char *);
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extern void ns_print(const u_char *, u_int, int);
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extern void ntp_print(const u_char *, u_int);
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extern u_int null_if_print(const struct pcap_pkthdr *, const u_char *);
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extern void ospf_print(const u_char *, u_int, const u_char *);
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extern void olsr_print (const u_char *, u_int, int);
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extern void pimv1_print(const u_char *, u_int);
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extern void cisco_autorp_print(const u_char *, u_int);
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extern void rsvp_print(const u_char *, u_int);
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extern void ldp_print(const u_char *, u_int);
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extern void lldp_print(const u_char *, u_int);
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extern void lmp_print(const u_char *, u_int);
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extern void lspping_print(const u_char *, u_int);
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extern void lwapp_control_print(const u_char *, u_int, int);
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extern void lwapp_data_print(const u_char *, u_int);
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extern void eigrp_print(const u_char *, u_int);
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extern void mobile_print(const u_char *, u_int);
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extern void pim_print(const u_char *, u_int, u_int);
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extern u_int pppoe_print(const u_char *, u_int);
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extern u_int ppp_print(register const u_char *, u_int);
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extern u_int ppp_if_print(const struct pcap_pkthdr *, const u_char *);
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extern u_int ppp_hdlc_if_print(const struct pcap_pkthdr *, const u_char *);
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extern u_int ppp_bsdos_if_print(const struct pcap_pkthdr *, const u_char *);
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extern u_int pppoe_if_print(const struct pcap_pkthdr *, const u_char *);
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extern u_int prism_if_print(const struct pcap_pkthdr *, const u_char *);
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extern void q933_print(const u_char *, u_int);
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extern int vjc_print(register const char *, u_short);
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extern void vqp_print(register const u_char *, register u_int);
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extern u_int raw_if_print(const struct pcap_pkthdr *, const u_char *);
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extern void rip_print(const u_char *, u_int);
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extern u_int sl_if_print(const struct pcap_pkthdr *, const u_char *);
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extern void lane_print(const u_char *, u_int, u_int);
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extern u_int lane_if_print(const struct pcap_pkthdr *, const u_char *);
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extern u_int cip_if_print(const struct pcap_pkthdr *, const u_char *);
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extern u_int sl_bsdos_if_print(const struct pcap_pkthdr *, const u_char *);
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extern u_int chdlc_if_print(const struct pcap_pkthdr *, const u_char *);
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extern u_int chdlc_print(register const u_char *, u_int);
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extern u_int juniper_atm1_print(const struct pcap_pkthdr *, const u_char *);
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extern u_int juniper_atm2_print(const struct pcap_pkthdr *, const u_char *);
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extern u_int juniper_mfr_print(const struct pcap_pkthdr *, register const u_char *);
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extern u_int juniper_mlfr_print(const struct pcap_pkthdr *, const u_char *);
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extern u_int juniper_mlppp_print(const struct pcap_pkthdr *, const u_char *);
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extern u_int juniper_pppoe_print(const struct pcap_pkthdr *, const u_char *);
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extern u_int juniper_pppoe_atm_print(const struct pcap_pkthdr *, const u_char *);
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extern u_int juniper_ggsn_print(const struct pcap_pkthdr *, const u_char *);
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extern u_int juniper_es_print(const struct pcap_pkthdr *, const u_char *);
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extern u_int juniper_monitor_print(const struct pcap_pkthdr *, const u_char *);
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extern u_int juniper_services_print(const struct pcap_pkthdr *, const u_char *);
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extern u_int juniper_ether_print(const struct pcap_pkthdr *, const u_char *);
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extern u_int juniper_ppp_print(const struct pcap_pkthdr *, const u_char *);
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extern u_int juniper_frelay_print(const struct pcap_pkthdr *, const u_char *);
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extern u_int juniper_chdlc_print(const struct pcap_pkthdr *, const u_char *);
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extern u_int sll_if_print(const struct pcap_pkthdr *, const u_char *);
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extern void snmp_print(const u_char *, u_int);
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extern void sunrpcrequest_print(const u_char *, u_int, const u_char *);
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extern u_int symantec_if_print(const struct pcap_pkthdr *, const u_char *);
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extern void tcp_print(const u_char *, u_int, const u_char *, int);
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extern void tftp_print(const u_char *, u_int);
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extern void timed_print(const u_char *);
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extern void udld_print(const u_char *, u_int);
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extern void udp_print(const u_char *, u_int, const u_char *, int);
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extern void vtp_print(const u_char *, u_int);
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extern void wb_print(const void *, u_int);
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extern int ah_print(register const u_char *);
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extern int ipcomp_print(register const u_char *, int *);
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extern void rx_print(register const u_char *, int, int, int, u_char *);
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extern void netbeui_print(u_short, const u_char *, int);
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extern void ipx_netbios_print(const u_char *, u_int);
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extern void nbt_tcp_print(const u_char *, int);
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extern void nbt_udp137_print(const u_char *, int);
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extern void nbt_udp138_print(const u_char *, int);
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extern void smb_tcp_print(const u_char *, int);
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extern char *smb_errstr(int, int);
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extern const char *nt_errstr(u_int32_t);
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extern void print_data(const unsigned char *, int);
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extern void l2tp_print(const u_char *, u_int);
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extern void vrrp_print(const u_char *, u_int, int);
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extern void slow_print(const u_char *, u_int);
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extern void sflow_print(const u_char *, u_int);
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extern void mpcp_print(const u_char *, u_int);
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extern void cfm_print(const u_char *, u_int);
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extern void pgm_print(const u_char *, u_int, const u_char *);
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extern void cdp_print(const u_char *, u_int, u_int);
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extern void dtp_print(const u_char *, u_int);
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extern void stp_print(const u_char *, u_int);
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extern void radius_print(const u_char *, u_int);
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extern void lwres_print(const u_char *, u_int);
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extern void pptp_print(const u_char *);
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extern void dccp_print(const u_char *, const u_char *, u_int);
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extern void sctp_print(const u_char *, const u_char *, u_int);
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extern void forces_print(const u_char *, u_int);
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extern void mpls_print(const u_char *, u_int);
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extern void mpls_lsp_ping_print(const u_char *, u_int);
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extern void zephyr_print(const u_char *, int);
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extern void hsrp_print(const u_char *, u_int);
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extern void bfd_print(const u_char *, u_int, u_int);
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extern void sip_print(const u_char *, u_int);
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extern void syslog_print(const u_char *, u_int);
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extern u_int bt_if_print(const struct pcap_pkthdr *, const u_char *);
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extern u_int usb_linux_48_byte_print(const struct pcap_pkthdr *, const u_char *);
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extern u_int usb_linux_64_byte_print(const struct pcap_pkthdr *, const u_char *);
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#ifdef INET6
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extern void ip6_print(const u_char *, u_int);
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extern void ip6_opt_print(const u_char *, int);
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extern int nextproto6_cksum(const struct ip6_hdr *, const u_short *, u_int, u_int);
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extern int hbhopt_print(const u_char *);
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extern int dstopt_print(const u_char *);
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extern int frag6_print(const u_char *, const u_char *);
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extern int mobility_print(const u_char *, const u_char *);
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extern void ripng_print(const u_char *, unsigned int);
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extern int rt6_print(const u_char *, const u_char *);
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extern void ospf6_print(const u_char *, u_int);
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extern void dhcp6_print(const u_char *, u_int);
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extern int mask62plen(const u_char *);
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#endif /*INET6*/
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extern u_short in_cksum(const u_short *, register u_int, int);
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extern u_int16_t in_cksum_shouldbe(u_int16_t, u_int16_t);
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#ifndef HAVE_BPF_DUMP
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struct bpf_program;
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extern void bpf_dump(const struct bpf_program *, int);
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#endif
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#include "netdissect.h"
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/* forward compatibility */
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#ifndef NETDISSECT_REWORKED
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extern netdissect_options *gndo;
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#define bflag gndo->ndo_bflag
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#define eflag gndo->ndo_eflag
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#define fflag gndo->ndo_fflag
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#define Kflag gndo->ndo_Kflag
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#define nflag gndo->ndo_nflag
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#define Nflag gndo->ndo_Nflag
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#define Oflag gndo->ndo_Oflag
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#define pflag gndo->ndo_pflag
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#define qflag gndo->ndo_qflag
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#define Rflag gndo->ndo_Rflag
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#define sflag gndo->ndo_sflag
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#define Sflag gndo->ndo_Sflag
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#define tflag gndo->ndo_tflag
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#define Uflag gndo->ndo_Uflag
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#define uflag gndo->ndo_uflag
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#define vflag gndo->ndo_vflag
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#define xflag gndo->ndo_xflag
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#define Xflag gndo->ndo_Xflag
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#define Cflag gndo->ndo_Cflag
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#define Gflag gndo->ndo_Gflag
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#define Aflag gndo->ndo_Aflag
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#define Bflag gndo->ndo_Bflag
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#define Iflag gndo->ndo_Iflag
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#define suppress_default_print gndo->ndo_suppress_default_print
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#define packettype gndo->ndo_packettype
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#define sigsecret gndo->ndo_sigsecret
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#define Wflag gndo->ndo_Wflag
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#define WflagChars gndo->ndo_WflagChars
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#define Cflag_count gndo->ndo_Cflag_count
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#define Gflag_count gndo->ndo_Gflag_count
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#define Gflag_time gndo->ndo_Gflag_time
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#define hflag gndo->ndo_hflag
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#define snaplen gndo->ndo_snaplen
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#define snapend gndo->ndo_snapend
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#endif
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