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NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | SEE ALSO | COLOPHON |
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PCAP_LIST_DATALINKS(3PCAP) PCAP_LIST_DATALINKS(3PCAP)
pcap_list_datalinks, pcap_free_datalinks - get a list of link-
layer header types supported by a capture device, and free that
list
#include <pcap/pcap.h>
int pcap_list_datalinks(pcap_t *p, int **dlt_buf);
void pcap_free_datalinks(int *dlt_list);
pcap_list_datalinks() is used to get a list of the supported
link-layer header types of the interface associated with the pcap
descriptor. pcap_list_datalinks() allocates an array to hold the
list and sets *dlt_buf to point to that array.
The caller is responsible for freeing the array with
pcap_free_datalinks(), which frees the list of link-layer header
types pointed to by dlt_list.
It must not be called on a pcap descriptor created by
pcap_create(3PCAP) that has not yet been activated by
pcap_activate(3PCAP).
pcap_list_datalinks() returns the number of link-layer header
types in the array on success, PCAP_ERROR_NOT_ACTIVATED if called
on a capture handle that has been created but not activated, and
PCAP_ERROR on other errors. If PCAP_ERROR is returned,
pcap_geterr(3PCAP) or pcap_perror(3PCAP) may be called with p as
an argument to fetch or display the error text.
pcap(3PCAP), pcap_datalink_val_to_name(3PCAP), pcap-linktype(7)
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
25 July 2018 PCAP_LIST_DATALINKS(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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