pcap_set_datalink(3)

pcap_set_datalink3

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

Usage

#include <pcap/pcap.h>

int pcap_set_datalink(pcap_t *p, int dlt);

Overview

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

Return value

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(3) or pcap_perror(3) may be called with p as an argument to fetch or display the error text.

Releases

39 releases since FreeBSD 8.0-RELEASE; the text changed 8 times.

  1. 8.0–8.4
  2. 9.0
  3. 9.1–10.4
  4. 11.0
  5. 11.1–11.3
  6. 11.4
  7. 12.0–12.1
  8. 12.2–13.4
  9. 13.5–16.0

From base 16.0-CURRENT-20261027-61c70dc16a79 in FreeBSD 16.0-CURRENT (2026-10-27). Parsed by carta from the page's man source.