Cocoa Packet Analyzer is a native Mac OS X implementation of a network protocol analyzer and packet sniffer. It is able to do basic network capturing, filter packets, analyze and display pcap files. CPA uses libPCAP for reading packet trace files and for capturing network traffic (filter expressions from tcpdump may be used).

Supported Types and Protocols:

• Ethertype ARP
• Ethertype IP
• Ethertype PPP
• Ethertype PPPoED/S
• Linktype Loopback
• Linktype PPP

• IP-Protocol IP
• IP-Protocol TCP
• IP-Protocol UDP
• IP-Protocol ICMP
• IP-Protocol IGMP
• IP-Protocol L2TP

• PPPoE Discovery and Sessionstages
• PPP-Protocols: IP, LCP, IPCP, CCP, PAP, CHAP
• L2TP-Protocol (port based detection)
• RADIUS-Protocol (port based detection)
• SIP-Protocol (third party analyzer plugin)
  

Screenshots:
Capturing
Loopback
RADIUS
L2TP
PPPoE-LCP
PPP-IPCP
IP-TCP



Downloads:
Version 0.48
What's new?



Requires:
Mac OS X 10.4 / 10.5

Some plans for 1.0 release:

• More protocols
• Nice name (suggestions?)
• Fancy GUI & icon(s) (wanna help?)
• Localizations
• Scripting
• Printing support