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pcap_datalink_val_to_description(3pcap) — Linux manual page

PCAP_DATALINK_VAL_TO_NAME(3PCAP)PCAP_DATALINK_VAL_TO_NAME(3PCAP)

NAME        top

       pcap_datalink_val_to_name, pcap_datalink_val_to_description,       pcap_datalink_val_to_description_or_dlt - get a name or       description for a link-layer header type value

SYNOPSIS        top

#include <pcap.h>const char *pcap_datalink_val_to_name(int dlt);const char *pcap_datalink_val_to_description(int dlt);const char *pcap_datalink_val_to_description_or_dlt(int dlt);

DESCRIPTION        top

pcap_datalink_val_to_name() translates a link-layer header type       value to the corresponding link-layer header type name, which is       theDLT_name for the link-layer header type value with theDLT_       removed.NULLis returned if the type value does not correspond       to a knownDLT_value.pcap_datalink_val_to_description() translates a link-layer header       type value to a short description of that link-layer header type.NULLis returned if the type value does not correspond to a knownDLT_value.pcap_datalink_val_to_description_or_dlt() translates a link-layer       header type value to a short description of that link-layer header       type just likepcap_datalink_val_to_description().  If the type       value does not correspond to a knownDLT_value, the string "DLT       n" is returned, where n is the value of the dlt argument.

BACKWARD COMPATIBILITY        top

       Thepcap_datalink_val_to_description_or_dlt() function first       became available in libpcap release 1.9.1.  In previous releases,pcap_datalink_val_to_description() would have to be called and, if       it returnedNULL, a default string would have to be constructed.

SEE ALSO        top

pcap(3PCAP),pcap_datalink(3PCAP),pcap_list_datalinks(3PCAP),pcap_datalink_name_to_val(3PCAP)

COLOPHON        top

       This page is part of thelibpcap (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 2025-08-11.       (At that time, the date of the most recent commit that was found       in the repository was 2025-08-10.)  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 isnot part of the original manual page), send a mail to       man-pages@man7.org                                4 May 2022PCAP_DATALINK_VAL_TO_NAME(3PCAP)

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