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NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | BACKWARD COMPATIBILITY | SEE ALSO | COLOPHON |
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PCAP_SET_PROTOCOL_LINUX(3PCAP) PCAP_SET_PROTOCOL_LINUX(3PCAP)
pcap_set_protocol_linux - set capture protocol for a not-yet-
activated capture handle
#include <pcap/pcap.h>
int pcap_set_protocol_linux(pcap_t *p, int protocol);
On network interface devices on Linux, pcap_set_protocol_linux()
sets the protocol to be used in the socket(2) call to create a
capture socket when the handle is activated. The argument is a
link-layer protocol value, such as the values in the
<linux/if_ether.h> header file, specified in host byte order. If
protocol is non-zero, packets of that protocol will be captured
when the handle is activated, otherwise, all packets will be
captured. This function is only provided on Linux, and, if it is
used on any device other than a network interface, it will have
no effect.
It should not be used in portable code; instead, a filter should
be specified with pcap_setfilter(3PCAP).
If a given network interface provides a standard link-layer
header, with a standard packet type, but provides some packet
types with a different socket-layer protocol type from the one in
the link-layer header, that packet type cannot be filtered with a
filter specified with pcap_setfilter() but can be filtered by
specifying the socket-layer protocol type using
pcap_set_protocol_linux().
pcap_set_protocol_linux() returns 0 on success or
PCAP_ERROR_ACTIVATED if called on a capture handle that has been
activated.
This function became available in libpcap release 1.9.0.
pcap(3PCAP), pcap_create(3PCAP), pcap_activate(3PCAP)
This page is part of the libpcap (packet capture library)
project. Information about the project can be found at
⟨http://www.tcpdump.org/⟩. If you have a bug report for this
manual page, see ⟨http://www.tcpdump.org/#patches⟩. This page
was obtained from the project's upstream Git repository
⟨https://github.com/the-tcpdump-group/libpcap.git⟩ on 2024-06-14.
(At that time, the date of the most recent commit that was found
in the repository was 2024-06-04.) If you discover any rendering
problems in this HTML version of the page, or you believe there
is a better or more up-to-date source for the page, or you have
corrections or improvements to the information in this COLOPHON
(which is not part of the original manual page), send a mail to
man-pages@man7.org
22 August 2018PCAP_SET_PROTOCOL_LINUX(3PCAP)
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HTML rendering created 2024-06-26 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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