PCAP_DATALINK_NAME_TO_VAL(3) Library Functions Manual PCAP_DATALINK_NAME_TO_VAL(3)NAME
pcap_datalink_name_to_val - get the link-layer header type value corresponding to a header type name
SYNOPSIS
#include <pcap/pcap.h>
int pcap_datalink_name_to_val(const char *name);
DESCRIPTION
pcap_datalink_name_to_val() translates a data link type name, which is a DLT_ name with the DLT_ removed, to the corresponding data link
type value. The translation is case-insensitive.
RETURN VALUE
pcap_datalink_name_to_val() returns 0 on success and -1 on failure.
SEE ALSO pcap(3)
5 April 2008 PCAP_DATALINK_NAME_TO_VAL(3)
Check Out this Related Man Page
PCAP_DATALINK(3PCAP)PCAP_DATALINK(3PCAP)NAME
pcap_datalink - get the link-layer header type
SYNOPSIS
#include <pcap/pcap.h>
int pcap_datalink(pcap_t *p);
DESCRIPTION
pcap_datalink() returns the link-layer header type for the live capture or ``savefile'' specified by p.
It must not be called on a pcap descriptor created by pcap_create() that has not yet been activated by pcap_activate().
http://www.tcpdump.org/linktypes.html lists the values pcap_datalink() can return and describes the packet formats that correspond to those
values.
Do NOT assume that the packets for a given capture or ``savefile`` will have any given link-layer header type, such as DLT_EN10MB for Eth-
ernet. For example, the "any" device on Linux will have a link-layer header type of DLT_LINUX_SLL even if all devices on the system at the
time the "any" device is opened have some other data link type, such as DLT_EN10MB for Ethernet.
RETURN VALUE
pcap_datalink() returns the link-layer header type on success and PCAP_ERROR_NOT_ACTIVATED if called on a capture handle that has been cre-
ated but not activated.
SEE ALSO pcap(3PCAP), pcap-linktype(7)
22 August 2010 PCAP_DATALINK(3PCAP)
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