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pcap_list_tstamp_types, pcap_free_tstamp_types - get a list of time stamp types supported by a capture device, and free that list

#include <pcap/pcap.h>

int pcap_list_tstamp_types(pcap_t *p, int **tstamp_typesp);
void pcap_free_tstamp_types(int *tstamp_types);

pcap_list_tstamp_types () is used to get a list of the supported time stamp types of the interface associated with the pcap descriptor. pcap_list_tstamp_types () allocates an array to hold the list and sets *tstamp_typesp to point to the array. See pcap-tstamp (@MAN_MISC_INFO@) for a list of all the time stamp types.

The caller is responsible for freeing the array with pcap_free_tstamp_types (), which frees the list pointed to by tstamp_types .

pcap_list_tstamp_types () returns the number of time stamp types in the array on success and PCAP_ERROR on failure. A return value of one means that the only time stamp type supported is the one in the list, which is the capture device's default time stamp type. A return value of zero means that the only time stamp type supported is PCAP_TSTAMP_HOST , which is the capture device's default time stamp type (only older versions of libpcap will return that; newer versions will always return one or more types). 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.

These functions became available in libpcap release 1.2.1. In previous releases, the time stamp type cannot be set; only the default time stamp type offered by a capture source is available.

pcap (3PCAP), pcap_tstamp_type_val_to_name (3PCAP), pcap-tstamp (@MAN_MISC_INFO@)