Add some additional checks to bpf_validate(), from OpenBSD.
Use bpf_validate() in install_bpf_program(), so we validate programs
even when they're being processed by userland filters; we make
bpf_validate() not reject backward branches, as we use them for the
protochain operator.
For BPF, don't assume that, just because no_optimize was set, we have a
program that we can't hand to the kernel; the user of the application
might have specified no optimization (e.g., tcpdump with -O), or we
might have generated code to handle 802.11 headers (the optimizer can't
handle that code). Instead, try handing the filter to the kernel and,
if that fails, try it in userland.
Get rid of BPF_MAXINSNS - we don't have a limit on program size in
libpcap.
field in a capture file into:
a 16-bit link-layer type field (it's 16 bits in pcap-NG, and
that'll probably be enough for the foreseeable future);
a 10-bit "class" field, indicating the group of link-layer type
values to which the link-layer type belongs - class 0 is for
regular DLT_ values, and class 0x224 grandfathers in the NetBSD
"raw address family" link-layer types;
a 6-bit "extension" field, storing information about the
capture, such an indication of whether the packets include an
FCS and, if so, how many bytes of FCS are present.
several files:
date: 2006/02/27 15:53:24; author: drochner; state: Exp;
avoid shadowing globals, for WARNS=2
date: 2006/02/27 15:55:30; author: drochner; state: Exp;
minor constification, good for WARNS=3 now
date: 2006/02/27 15:57:17; author: drochner; state: Exp;
NetBSD adaption:
...
-const pcap_strerror() for consistency
gencode.c:
date: 2006/04/26 09:24:33; author: tron; state: Exp;
Add missing "const" keywords to match declarations in "pcap.h".
date: 2006/10/15 19:27:21; author: christos; state: Exp;
add a volatile variable to prevent vfork/longjmp clobbering.
optimize.c:
date: 2006/05/17 17:48:36; author: drochner; state: Exp;
Make the optimizer use unsigned numbers as the kernel does.
While it is not agreed on that purely unsigned arithmetics is nice,
different behaviour of optimized and unoptimized code is less desirable.
pcap-bpf.c:
date: 2006/02/27 15:51:38; author: drochner; state: Exp;
pull in from NetBSD's libpcap: use cloning bpf device on NetBSD
Have the configure script check for paths.h, so that we can include it
only if we have it, and use the cloning BPF device only if we're on
NetBSD *and* _PATH_BPF is defined (hopefully this will keep us from
using it on versions of NetBSD that don't have a cloning BPF device; if,
in the future, other OSes with BPF get cloning BPF devices, we can make
this work for them as well).
source directory and the target include directory, and have include
files at the top-level directory to include those headers, for backwards
compatibility.
Update the FILES and INSTALL.txt files to reflect current reality.
guy