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f331ac58f8
breaking filter expressions like "ether[14:4]=0xaaaa0300". ok op@ deraadt@ -/-------------------------- revision 1.32 date: 2024/08/29 07:33:50; author: anton; state: Exp; lines: +2 -2; commitid: ZYtBn8qrrNNh87on; Fix regression introduced in previous migration to strtol() by correcting the error condition, making it on par with the example in the manual. ok op@ -/-------------------------- revision 1.31 date: 2024/08/28 11:40:33; author: op; state: Exp; lines: +13 -31; commitid: RirJPBPfGo9NeSE6; libpcap: replace hand-rolled number parser with strtol can't use strtonum here since it needs to handle octal and hex notations as well. Part of a larger diff that's ok beck@ -/-------------------------- |
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| bpf_image.c | ||
| CHANGES | ||
| etherent.c | ||
| ethertype.h | ||
| fad-getad.c | ||
| gencode.c | ||
| gencode.h | ||
| grammar.y | ||
| inet.c | ||
| llc.h | ||
| Makefile | ||
| nametoaddr.c | ||
| optimize.c | ||
| pcap_open_live.3 | ||
| pcap-bpf.c | ||
| pcap-filter.5 | ||
| pcap-int.h | ||
| pcap-namedb.h | ||
| pcap.c | ||
| pcap.h | ||
| ppp.h | ||
| README | ||
| savefile.c | ||
| scanner.l | ||
| shlib_version | ||
| VERSION | ||
$OpenBSD: README,v 1.7 2014/04/11 04:08:58 lteo Exp $ $NetBSD: README,v 1.2 1995/03/06 11:38:07 mycroft Exp $ LIBPCAP 0.5 Now maintained by "The Tcpdump Group" Send patches to patches@tcpdump.org See www.tcpdump.org formerly from Lawrence Berkeley National Laboratory Network Research Group <libpcap@ee.lbl.gov> ftp://ftp.ee.lbl.gov/libpcap.tar.Z (0.4) This directory contains source code for libpcap, a system-independent interface for user-level packet capture. libpcap provides a portable framework for low-level network monitoring. Applications include network statistics collection, security monitoring, network debugging, etc. Since almost every system vendor provides a different interface for packet capture, and since we've developed several tools that require this functionality, we've created this system-independent API to ease in porting and to alleviate the need for several system-dependent packet capture modules in each application. Note well: this interface is new and is likely to change. The libpcap interface supports a filtering mechanism based on the architecture in the BSD packet filter. BPF is described in the 1993 Winter Usenix paper ``The BSD Packet Filter: A New Architecture for User-level Packet Capture''. A compressed postscript version is in: ftp://ftp.ee.lbl.gov/papers/bpf-usenix93.ps.Z. Although most packet capture interfaces support in-kernel filtering, libpcap utilizes in-kernel filtering only for the BPF interface. On systems that don't have BPF, all packets are read into user-space and the BPF filters are evaluated in the libpcap library, incurring added overhead (especially, for selective filters). Ideally, libpcap would translate BPF filters into a filter program that is compatible with the underlying kernel subsystem, but this is not yet implemented. BPF is standard in 4.4BSD, BSD/386, NetBSD, and FreeBSD. DEC OSF/1 uses the packetfilter interface but has been extended to accept BPF filters (which libpcap utilizes). Also, you can add BPF filter support to Ultrix using the kernel source and/or object patches available in: ftp://gatekeeper.dec.com/pub/DEC/net/bpfext42.tar.Z. Problems, bugs, questions, desirable enhancements, source code contributions, etc., should be sent to the email address "patches@tcpdump.org".