know that..."; currently, only pcap_activate() returns them, but we
might want some more warning returns for some other calls, such as the
ones that set filters. It's a little cleaner than "clear out the error
message buffer and, if it's not empty after a successful return, it has
a warning", and a little cleaner than spewing a warning to the standard
error (as that might not be visible to the user if they're running a GUI
application).
that often means "sorry, this platform requires you to run as root or to
somehow tweak the system to give you capture privileges", and
applications might want to explain that in a way that does a better job
of letting the user know what they have to do.
Try to return or PCAP_ERROR_PERM_DENIED for open errors, rather than
just returning PCAP_ERROR, so that the application can, if it chooses,
try to explain the error better (as those two errors are the ones that
don't mean "there's probably some obscure OS or libpcap problem", but
mean, instead, "you made an error" or "you need to get permission to
capture").
Check for monitor mode *after* checking whether the device exists in the
first place; a non-existent device doesn't support monitor mode, but
that's because it doesn't, well, exist, and the latter would be a more
meaningful error.
Have pcap_open_live() supply an error message for return values other
than PCAP_ERROR, PCAP_ERROR_NO_SUCH_DEVICE, and PCAP_ERROR_PERM_DENIED -
those all supply error strings (PCAP_ERROR because it's for various OS
problems that might require debugging, and the other two because there
might be multiple causes).
handle" routine, an 'activate a pcap_t handle" routine, and some "set
the properties of the pcap_t handle" routines, so that, for example, the
buffer size can be set on a BPF device before the device is bound to an
interface.
Add additional routines to set monitor mode, and make at least an
initial attempt at supporting that on Linux, *BSD, and Mac OS X 10.4 and
10.5. (Very much "initial" for Linux, which is a twisty little maze of
wireless drivers, many different.)
Have a "timeout" member of the pcap_md structure on all platforms, use
that on Windows instead of the "timeout" member of the pcap_t structure,
and get rid of the "timeout" member of that structure.
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.
Add support for additional link types to gencode.c, so we at least
support "link[N:M]" and an empty expression.
Sort the DLT_CHOICE values in order by the DLT_ value, add missing ones,
and fix some existing descriptions.
This patch introduces support for the DAG ERF type
TYPE_COLOR_MC_HDLC_POS.
The patch also allows appropriate DAG cards (DAG 3.7T, DAG 7.1S)
to optionally produce DLT_MTP2_WITH_PHDR (139) traces when
capturing from channelised HDLC links, as an alternative to
DLT_MTP2 (140). When using the new DLT, the 'DAG channel' is
recorded in the pcap record pseudo header as the 'link_number'.
Basic BPF filtering support for DLT_MTP2_WITH_PHDR is also
added.
Fix some warnings.
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).
Linux. The USB sniffing code for Linux now supplies a per-packet header
based on the one supplied by the Linux binary sniffing interface, so we
add a new DLT_ value and use that.
Fix his e-mail address, and add him to the credits.
Abeni.
Added DLT/DLT name table mappings and linktype values and DLT/linktype
mappings for USB and for the Bluetooth NCI UART transport layer.
Fix up indentation.
packets, only sent packets, or all packets be accepted, with an
implementation for Linux.
Add an implementation for BPF platforms that support BIOCSSEESENT.
rename it again to DLT_PPP_PPPD, and rename other #defines to match.
Add backwards-compatibility #defines of DLT_PPP_WITH_DIRECTION and
DLT_LINUX_PPP_WITHDIRECTION for software that used them.
to pointer variables, so the signature can't be changed).
From Gisle Vanem: assign to the right variables in the Win32
version-string construction code (where one criterion for being "right"
is that the variable exist...).
UN*Xy-enough platform that the Makefile.in rules to generate "version.h"
work), and use the stuff from "version.h" iff HAVE_VERSION_H is defined,
so we can use it even with WinPcap.
DLT_IEEE802_11_RADIO_AVS for future use with the AVS radio header.
Fix a comment.
Put in reserved LINKTYPE_USERn values corresponding to the reserved
DLT_USERn values.
devices, offer DLT_DOCSIS as one of the choices of link-layer type, and
support setting that type as meaning just "set libpcap's notion of the
link-layer type to DLT_DOCSIS" without telling the driver to use
DLT_DOCSIS.
guy