Magic Firewall fields

Field Name	Description
`cf.colo.name` `String`	The data center that is handling this traffic. Example value: `sfo06`
`cf.colo.region` `String`	Region of the data center that is handling this traffic. Example value: `WNAM`
`icmp` `String`	The raw ICMP packet as a list of bytes. It should be used in conjunction with the bit_slice function when other structured fields are lacking.
`icmp.type` `Number`	The ICMP type. Only applies to ICMP packets. Example value: `8`
`icmp.code` `Number`	The ICMP code. Only applies to ICMP packets. Example value: `2`
`ip` `String`	The raw IP packet as a list of bytes. It should be used in conjunction with the bit_slice function when other structured fields are lacking.
`ip.dst` `IP Address`	The destination address as specified in the IP packet. Example value: `192.0.2.2`
`ip.geoip.country` `String`	Represents the 2-letter country code associated with the client IP address in ISO 3166-1 Alpha 2 format. Example value: `GB` For more information on the ISO 3166-1 Alpha 2 format, see ISO 3166-1 Alpha 2 on Wikipedia. This field matches on both source and destination IP addresses.
`ip.hdr_len` `Number`	The length of the IPv4 header in bytes. Example value: `5`
`ip.len` `Number`	The length of the packet including the header. Example value: `60`
`ip.opt.type` `Number`	The first byte of IP options field, if the options field is set. Example value: `25`
`ip.proto` `String`	The transport layer for the packet, if it can be determined. Example values: `icmp`, `tcp`
`ip.src` `IP Address`	The source address of the IP Packet.
`ip.ttl` `Number`	The time-to-live of the IP Packet. Example values: `54`
`tcp` `String`	The raw TCP packet as a list of bytes. It should be used in conjunction with the bit_slice function when other structured fields are lacking.
`tcp.flags` `Number`	The numeric value of the TCP flags byte.
`tcp.flags.ack` `Boolean`	TCP acknowledgment flag.
`tcp.flags.cwr` `Boolean`	TCP congestion window reduced flag.
`tcp.flags.ecn` `Boolean`	TCP ECN-Echo flag.
`tcp.flags.fin` `Boolean`	TCP flag indicating this is the last packet from sender.
`tcp.flags.push` `Boolean`	TCP push flag.
`tcp.flags.reset` `Boolean`	TCP reset flag.
`tcp.flags.syn` `Boolean`	TCP synchronize flag.
`tcp.flags.urg` `Boolean`	TCP urgent flag.
`tcp.srcport` `Number`	Source port number of the IP packet. Only applies to TCP packets.
`tcp.dstport` `Number`	Destination port number of the IP packet. Only applies to TCP packets.
`udp` `String`	The raw UDP packet as a list of bytes. It should be used in conjunction with the bit_slice function when other structured fields are lacking.
`udp.dstport` `Number`	Destination port number of the IP packet. Only applies to UDP packets.
`udp.srcport` `Number`	Source port number of the IP packet. Only applies to UDP packets.