d56f51ea7d
As part of this, we import bpf_filter.c from NetBSD. Even though that file is part of the NetBSD kernel, it is also used by userland (as is clear here). Our LWIP service has its own bpf_filter.c implementation but that implementation has certain limits (e.g. on program size) that are fine for a system service but should not apply to userland. The libpcap code has a number of blocks guarded by __NetBSD__, but none of those blocks apply to MINIX 3. In particular, some of the alignment logic used for NetBSD may in fact not work in our case. Change-Id: Ib187e22d627c929e111d5d4a991c3bee3c0154cb
65 lines
2.3 KiB
Plaintext
65 lines
2.3 KiB
Plaintext
.\" $NetBSD: pcap_can_set_rfmon.3pcap,v 1.2 2014/11/19 19:33:30 christos Exp $
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.\"
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.\" Copyright (c) 1994, 1996, 1997
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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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.TH PCAP_CAN_SET_RFMON 3PCAP "18 May 2010"
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.SH NAME
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pcap_can_set_rfmon \- check whether monitor mode can be set for a
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not-yet-activated capture handle
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.SH SYNOPSIS
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.nf
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.ft B
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#include <pcap/pcap.h>
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.LP
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.ft B
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int pcap_can_set_rfmon(pcap_t *p);
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.ft
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.fi
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.SH DESCRIPTION
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.B pcap_can_set_rfmon()
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checks whether monitor mode could be set on a capture handle when
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the handle is activated.
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.SH RETURN VALUE
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.B pcap_can_set_rfmon()
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returns 0 if monitor mode could not be set,
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1 if monitor mode could be set,
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.B PCAP_ERROR_NO_SUCH_DEVICE
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if the capture source specified when the handle was created doesn't
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exist,
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.B PCAP_ERROR_PERM_DENIED
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if the process doesn't have permission to check whether monitor mode
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could be supported,
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.B PCAP_ERROR_ACTIVATED
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if called on a capture handle that has been activated, or
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.B PCAP_ERROR
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if an error occurred.
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If
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.B PCAP_ERROR
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is returned,
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.B pcap_geterr()
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or
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.B pcap_perror()
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may be called with
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.I p
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as an argument to fetch or display the error text.
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.SH SEE ALSO
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pcap(3PCAP), pcap_create(3PCAP), pcap_activate(3PCAP),
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pcap_set_rfmon(3PCAP)
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