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- .\" Copyright (c) 1994, 1996, 1997
- .\" The Regents of the University of California. All rights reserved.
- .\"
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- .\" modification, are permitted provided that: (1) source code distributions
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- .\" ``This product includes software developed by the University of California,
- .\" Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
- .\" the University nor the names of its contributors may be used to endorse
- .\" or promote products derived from this software without specific prior
- .\" written permission.
- .\" THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
- .\" WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
- .\" MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
- .\"
- .TH PCAP_CREATE 3PCAP "3 January 2014"
- .SH NAME
- pcap_create \- create a live capture handle
- .SH SYNOPSIS
- .nf
- .ft B
- #include <pcap/pcap.h>
- .ft
- .LP
- .nf
- .ft B
- char errbuf[PCAP_ERRBUF_SIZE];
- .ft
- .LP
- .ft B
- pcap_t *pcap_create(const char *source, char *errbuf);
- .ft
- .fi
- .SH DESCRIPTION
- .B pcap_create()
- is used to create a packet capture handle to look
- at packets on the network.
- .I source
- is a string that specifies the network device to open; on Linux systems
- with 2.2 or later kernels, a
- .I source
- argument of "any" or
- .B NULL
- can be used to capture packets from all interfaces.
- .PP
- The returned handle must be activated with
- .B pcap_activate()
- before packets can be captured
- with it; options for the capture, such as promiscuous mode, can be set
- on the handle before activating it.
- .SH RETURN VALUE
- .B pcap_create()
- returns a
- .I pcap_t *
- on success and
- .B NULL
- on failure.
- If
- .B NULL
- is returned,
- .I errbuf
- is filled in with an appropriate error message.
- .I errbuf
- is assumed to be able to hold at least
- .B PCAP_ERRBUF_SIZE
- chars.
- .SH SEE ALSO
- pcap(3PCAP), pcap_activate(3PCAP)
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