pcap_set_datalink(3PCAP) man page

Updated: 5 March 2022
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This man page documents libpcap version 1.11.0-PRE-GIT (see also: 1.10.1, 1.10.0, 1.9.1, 1.9.0, 1.8.1, 1.7.4, 1.6.2, 1.5.3).

Your system may have a different version installed, possibly with some local modifications. To achieve the best results, please make sure this version of this man page suits your needs. If necessary, try to look for a different version on this web site or in the man pages available in your installation.


pcap_set_datalink - set the link-layer header type to be used by a capture device


#include <pcap/pcap.h>

int pcap_set_datalink(pcap_t *p, int dlt);


pcap_set_datalink() is used to set the current link-layer header type of the pcap descriptor to the type specified by dlt.


pcap_set_datalink() returns 0 on success, PCAP_ERROR_NOT_ACTIVATED if called on a capture handle that has been created but not activated, or 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_name_to_val(3PCAP)


This HTML man page was generated at 15:38:07 GMT, March 07, 2022 from a source man page in "The Tcpdump Group" git repositories using man2html and other tools.