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pcap_datalink_val_to_name(3pcap) — Linux manual page

NAME | SYNOPSIS | DESCRIPTION | BACKWARD COMPATIBILITY | SEE ALSO | COLOPHON 

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
       the DLT_ name for the link-layer header type value with the DLT_
       removed.  NULL is returned if the type value does not correspond
       to a known DLT_ value.

       pcap_datalink_val_to_description() translates a link-layer header
       type value to a short description of that link-layer header type.
       NULL is returned if the type value does not correspond to a known
       DLT_ 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 like pcap_datalink_val_to_description().  If the type
       value does not correspond to a known DLT_ value, the string "DLT
       n" is returned, where n is the value of the dlt argument.

BACKWARD COMPATIBILITY         top

       The pcap_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 returned NULL, 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 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 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 is not 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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