nw_pcap_pkg Package Body Reference

Package Body >> nw_pcap_pkg

Functions
t_slv_arr	f_pcap_read_pkt ( name: in string pkt_no: in natural pkt_len: in natural bigendian: in boolean )	[ impure ]
integer	f_pcap_get_pkt_cnt ( name: in string )	[ impure ]
	Get PCAP file packet count.
natural	f_pcap_get_pkt_len ( name: in string , pkt_no: in natural )	[ impure ]
	Get length of network packet.
t_slv_arr	f_pcap_get_pkt ( name: in string pkt_no: in natural pkt_len: in natural )	[ impure ]
	Extract packet from file.

Member Function/Procedure/Process Documentation

f_pcap_get_pkt_cnt()

integer f_pcap_get_pkt_cnt (   name in string   ) impure

Function

Get PCAP file packet count.

Parameters

name	PCAP file name

Returns

Number of network packets in file (-1 on failure).

Get the number of network packets in PCAP file. Supports both PCAP and PCAPNG formats (only the first section in the latter format).

Example use

v_cnt := f_pcap_get_pkt_cnt("../nw_pcap/tb/ipv6-smtp.pcapng");  -- v_cnt is now 17 (17 packets in this file)
v_cnt := f_pcap_get_pkt_cnt("../nw_pcap/tb/PPTP_negotiation.pcap");  -- v_cnt is now 28 (28 packets in this file)

f_pcap_get_pkt_len()

natural f_pcap_get_pkt_len (   name in string ,   pkt_no in natural   ) impure

Function

Get length of network packet.

Parameters

name	PCAP file name
pkt_no	Index of network packet in file (0 is first)

Returns

Number of bytes in network packet

Get the length of a specific network packet in a PCAP file.

Example use

v_len := f_pcap_get_pkt_len("../nw_pcap/tb/ipv6-smtp.pcapng", 3);  -- v_len is now 125 (length of packet #3)
v_len := f_pcap_get_pkt_cnt("../nw_pcap/tb/PPTP_negotiation.pcap", 26);  -- v_len is now 138 (length of packet #26)

f_pcap_get_pkt()

t_slv_arr f_pcap_get_pkt (   name in string ,   pkt_no in natural ,   pkt_len in natural   ) impure

Function

Extract packet from file.

Parameters

name	PCAP file name
pkt_no	Index of network packet in file (0 is first)
pkt_len	Number of bytes to read

Returns

8bit data array with packet

Get a specific packet from file.

Example use

v_len                  := f_pcap_get_pkt_len("../nw_pcap/tb/ipv6-smtp.pcapng", 3);  -- v_len is now 125 (length of packet #3)
v_data(0 to v_len - 1) := f_pcap_get_pkt("../nw_pcap/tb/ipv6-smtp.pcapng", 3, v_len); 

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The documentation for this design unit was generated from the following file:

• nw_pcap/src/nw_pcap_pkg.vhd