Network Security Tools

Name

pcap_list_datalinks — Prototype: int pcap_list_datalinks(pcap_t *p, int **dlt_buf);

Synopsis

Purpose: pcap_list_datalinks lists all data link types supported by a capture device. Where multiple types are supported, a particular data link type can be selected with pcap_set_datalink. pcap_list_datalinks returns the number of supported data links on success, with dlt_buf pointing to an array of data link type values. The function returns -1 on error. The data link type values can be converted to human-readable link types (such as the values in Table 10-2) using the pcap_datalink_val_to_name or pcap_datalink_val_to_description functions. You can find an example of using pcap_list_datalinks in the Section 10.2.4 section earlier in this chapter.