329 lines
13 KiB
Plaintext
329 lines
13 KiB
Plaintext
@(#) $Header: INSTALL,v 1.42 98/03/20 18:49:16 vern Exp $ (LBL)
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To build libpcap, first customize any paths in Makefile.in, then run
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"./configure" (a shell script). The configure script will determine
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your system attributes and generate an appropriate Makefile from
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Makefile.in. Next run "make". If everything goes well you can su to
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root and run "make install", "make install-incl" and "make
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install-man". However, you need not install libpcap if you just want to
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build tcpdump; just make sure the tcpdump and libpcap directory trees
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have the same parent directory.
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If configure says:
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configure: warning: cannot determine packet capture interface
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configure: warning: (see INSTALL for more info)
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then your system either does not support packet capture or your system
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does support packet capture but libpcap does not support that
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particular type. (If you have HP-UX, see below.) If your system uses a
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packet capture not supported by libpcap, please send us patches; don't
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forget to include an autoconf fragment suitable for use in
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configure.in.
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It is possible to override the default packet capture type, although
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the circumstance where this works are limited. For example if you have
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installed bpf under SunOS 4 and wish to build a snit libpcap:
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./configure --with-pcap=snit
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Another example is to force a supported packet capture type in the case
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where the configure scripts fails to detect it.
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You will need an ANSI C compiler to build libpcap. The configure script
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will abort if your compiler is not ANSI compliant. If this happens, use
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the GNU C compiler, available via anonymous ftp:
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ftp://prep.ai.mit.edu/pub/gnu/gcc-*.tar.gz
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Note well: If you use gcc, you may need to run its "fixincludes"
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script. Running fixincludes is not required with later versions of gcc
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and in some cases (e.g. Solaris 2.5) causes problems when run. The
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configure script will abort with:
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checking for ANSI ioctl definitions... yes
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configure: error: see the INSTALL for more info
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if it detects if the fixincludes needs to be run. If the fixincludes
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test in configure passes, you're probably ok.
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If you use flex, you must use version 2.4.6 or higher. The configure
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script automatically detects the version of flex and will not use it
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unless it is new enough. You can use "flex -V" to see what version you
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have (unless it's really old). The current version of flex is available
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via anonymous ftp:
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ftp://ftp.ee.lbl.gov/flex-*.tar.Z
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As of this writing, the current version is 2.5.4.
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If you use bison, you must use flex (and visa versa). The configure
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script automatically falls back to lex and yacc if both flex and bison
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are not found.
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Sometimes the stock C compiler does not interact well with flex and
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bison. The list of problems includes undefined references for alloca.
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You can get around this by installing gcc or manually disabling flex
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and bison with:
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./configure --without-flex --without-bison
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If your system only has AT&T lex, this is okay unless your libpcap
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program uses other lex/yacc generated code. (Although it's possible to
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map the yy* identifiers with a script, we use flex and bison so we
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don't feel this is necessary.)
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Some systems support the Berkeley Packet Filter natively; for example
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out of the box OSF and BSD/OS have bpf. If your system does not support
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bpf, you will need to pick up:
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ftp://ftp.ee.lbl.gov/bpf-*.tar.Z
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Note well: you MUST have kernel source for your operating system in
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order to install bpf. An exception is SunOS 4; the bpf distribution
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includes replacement kernel objects for some of the standard SunOS 4
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network device drivers. See the bpf INSTALL document for more
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information.
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If you use Solaris, there is a bug with bufmod(7) that is fixed in
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Solaris 2.3.2 (aka SunOS 5.3.2). Setting a snapshot length with the
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broken bufmod(7) results in data be truncated from the FRONT of the
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packet instead of the end. The work around is to not set a snapshot
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length but this results in performance problems since the entire packet
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is copied to user space. If you must run an older version of Solaris,
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there is a patch available from Sun; ask for bugid 1149065. After
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installing the patch, use "setenv BUFMOD_FIXED" to enable use of
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bufmod(7). However, we recommend you run a more current release of
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Solaris.
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If you use the SPARCompiler, you must be careful to not use the
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/usr/ucb/cc interface. If you do, you will get bogus warnings and
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perhaps errors. Either make sure your path has /opt/SUNWspro/bin
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before /usr/ucb or else:
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setenv CC /opt/SUNWspro/bin/cc
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before running configure. (You might have to do a "make distclean"
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if you already ran configure once).
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Also note that "make depend" won't work; while all of the known
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universe uses -M, the SPARCompiler uses -xM to generate makefile
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dependencies.
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If you are trying to do packet capture with a FORE ATM card, you may or
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may not be able to. They usually only release their driver in object
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code so unless their driver supports packet capture, there's not much
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libpcap can do.
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If you get an error like:
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tcpdump: recv_ack: bind error 0x???
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when using DLPI, look for the DL_ERROR_ACK error return values, usually
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in /usr/include/sys/dlpi.h, and find the corresponding value.
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Under OSF, packet capture must be enabled before it can be used. For
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instructions on how to enable packet filter support, see:
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ftp://ftp.digital.com/pub/Digital/dec-faq/Digital-UNIX
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Once you enable packet filter support, your OSF system will support bpf
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natively.
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Under Ultrix, packet capture must be enabled before it can be used. For
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instructions on how to enable packet filter support, see:
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ftp://ftp.digital.com/pub/Digital/dec-faq/ultrix
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If you use HP-UX, you must have at least version 9 and either the
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version of cc that supports ANSI C (cc -Aa) or else use the GNU C
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compiler. You must also buy the optional streams package. If you don't
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have:
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/usr/include/sys/dlpi.h
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/usr/include/sys/dlpi_ext.h
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then you don't have the streams package. In addition, we believe you
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need to install the "9.X LAN and DLPI drivers cumulative" patch
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(PHNE_6855) to make the version 9 DLPI work with libpcap.
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It's been reported that the DLPI streams package is standard starting
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with HP-UX 10.
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The HP implementation of DLPI is a little bit eccentric. Unlike
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Solaris, you must attach /dev/dlpi instead of the specific /dev/*
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network pseudo device entry in order to capture packets. The ppa is
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based on the ifnet "index" number. Under HP-UX 9, it is necessary to
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read /dev/kmem and the kernel symbol file (/hp-ux). Under HP-UX 10,
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dlpi can provide information for determining the ppa. It does not seem
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to be possible to trace the loopback interface. Unlike other DLPI
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implementations, PHYS implies MULTI and SAP and you get an error if you
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try to enable more than one promiscous more than one promiscuous mode
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at a time. Finally, testing shows that there can't be more than one
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simultaneous dlpi user per network interface and you cannot capture
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outbound packets.
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If you use Linux, this version of libpcap is known to compile and run
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under Red Hat 4.0 with the 2.0.25 kernel. It may work with earlier 2.X
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versions but is guaranteed not to work with 1.X kernels. Running more
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than one libpcap program at a time can cause problems since promiscuous
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mode is implemented by twiddlin the interface flags from the libpcap
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application. Also, packet timestamps aren't very good. This appears to
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be due to haphazard handling of the timestamp in the kernel.
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Note well: there is rumoured to be a version of tcpdump floating around
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called 3.0.3 that includes libpcap and is supposed to support Linux.
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You should be advised that the Network Research Group at LBNL never
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generated a release with this version number. We note with interest
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that a standard cracker trick to get people to install trojans is to
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distribute bogus packages that have a version number higher than the
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current release. We also note with annoyance that 90% of the Linux
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related bug reports we get are due to changes made to unofficial
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versions of our page. If you are having trouble but aren't using a
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version that came from ftp.ee.lbl.gov, please try that before
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submitting a bug report!
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If you use AIX, you may not be able to build libpcap from this release.
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Although AIX 4 ships with tcpdump, it is an old version that predates
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libpcap. We do not have an AIX system in house so it's impossible for
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us to test AIX patches submitted to us. We are told that you must link
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against /lib/pse.exp, that you must use AIX cc or a GNU C compiler
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newer than 2.7.2 and that you may need to run strload before running a
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libpcap application. Also, it may be necessary to run the configure
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script as root in order for it to detect that bpf is available. Another
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workaround is to use:
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./configure --with-pcap=bpf
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If you use NeXTSTEP, you will not be able to build libpcap from this
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release. We hope to support this operating system in some future
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release of libpcap.
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If you use SINIX, you should be able to build libpcap from this
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release. It is known to compile and run on SINIX-Y/N 5.42 with the C-DS
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V1.0 or V1.1 compiler. But note that in some releases of SINIX, yacc
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emits incorrect code; if grammar.y fails to compile, change every
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occurence of:
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#ifdef YYDEBUG
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to:
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#if YYDEBUG
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Another workaround is to use flex and bison.
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If you use SCO, you might have trouble building libpcap from this
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release. We do not have a machine running SCO and have not had reports
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of anyone successfully building on it. Since SCO apparently supports
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dlpi, it's possible the current version works. Meanwhile, sco provides
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a tcpdump binary as part of their "Network/Security Tools" package:
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http://www.sco.com/technology/internet/goodies/#SECURITY
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There is also a README that explains how to enable packet capture.
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If you use UnixWare, you will not be able to build libpcap from this
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release. We hope to support this operating system in some future
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release of libpcap. Meanwhile, there appears to be an UnixWare port of
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libpcap 0.0 (and tcpdump 3.0) in:
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ftp://ftp1.freebird.org/pub/mirror/freebird/internet/systools/
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UnixWare appears to use a hacked version of DLPI.
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If linking tcpdump fails with "Undefined: _alloca" when using bison on
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a Sun4, your version of bison is broken. In any case version 1.16 or
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higher is recommended (1.14 is known to cause problems 1.16 is known to
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work). Either pick up a current version from:
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ftp://prep.ai.mit.edu/pub/gnu/bison.tar.gz
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or hack around it by inserting the lines:
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#ifdef __GNUC__
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#define alloca __builtin_alloca
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#else
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#ifdef sparc
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#include <alloca.h>
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#else
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char *alloca ();
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#endif
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#endif
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right after the (100 line!) GNU license comment in bison.simple, remove
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grammar.[co] and fire up make again.
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If you use SunOS 4, your kernel must support streams NIT. If you run a
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libpcap program and it dies with:
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/dev/nit: No such device
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You must add streams NIT support to your kernel configuration, run
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config and boot the new kernel.
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If you are running a version of SunOS earlier than 4.1, you will need
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to replace the Sun supplied /sys/sun{3,4,4c}/OBJ/nit_if.o with the
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appropriate version from this distribution's SUNOS4 subdirectory and
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build a new kernel:
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nit_if.o.sun3-sunos4 (any flavor of sun3)
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nit_if.o.sun4c-sunos4.0.3c (SS1, SS1+, IPC, SLC, etc.)
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nit_if.o.sun4-sunos4 (Sun4's not covered by
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nit_if.o.sun4c-sunos4.0.3c)
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These nit replacements fix a bug that makes nit essentially unusable in
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pre-SunOS 4.1. In addition, our sun4c-sunos4.0.3c nit gives you
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timestamps to the resolution of the SS-1 clock (1 us) rather than the
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lousy 20ms timestamps Sun gives you (tcpdump will print out the full
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timestamp resolution if it finds it's running on a SS-1).
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FILES
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-----
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CHANGES - description of differences between releases
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FILES - list of files exported as part of the distribution
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INSTALL - this file
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Makefile.in - compilation rules (input to the configure script)
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README - description of distribution
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SUNOS4 - pre-SunOS 4.1 replacement kernel nit modules
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VERSION - version of this release
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aclocal.m4 - autoconf macros
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bpf/net - copies of bpf_filter.c and bpf.h
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bpf_filter.c - symlink to bpf/net/bpf_filter.c
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bpf_image.c - bpf disassembly routine
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config.guess - autoconf support
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config.sub - autoconf support
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configure - configure script (run this first)
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configure.in - configure script source
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etherent.c - /etc/ethers support routines
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ethertype.h - ethernet protocol types and names definitions
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gencode.c - bpf code generation routines
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gencode.h - bpf code generation definitions
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grammar.y - filter string grammar
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inet.c - network routines
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install-sh - BSD style install script
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lbl/gnuc.h - gcc macros and defines
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lbl/os-*.h - os dependent defines and prototypes
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linux-include/* - network include files missing on Linux
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mkdep - construct Makefile dependency list
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nametoaddr.c - hostname to address routines
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net - symlink to bpf/net
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optimize.c - bpf optimization routines
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pcap-bpf.c - BSD Packet Filter support
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pcap-dlpi.c - Data Link Provider Interface support
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pcap-enet.c - enet support
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pcap-int.h - internal libpcap definitions
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pcap-namedb.h - public libpcap name database definitions
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pcap-nit.c - Network Interface Tap support
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pcap-nit.h - Network Interface Tap definitions
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pcap-null.c - dummy monitor support (allows offline use of libpcap)
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pcap-pf.c - Packet Filter support
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pcap-pf.h - Packet Filter definitions
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pcap-snit.c - Streams based Network Interface Tap support
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pcap-snoop.c - Snoop network monitoring support
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pcap.3 - manual entry
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pcap.c - pcap utility routines
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pcap.h - public libpcap definitions
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ppp.h - Point to Point Protocol definitions
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savefile.c - offline support
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scanner.l - filter string scanner
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