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mirror of https://github.com/wader/fq.git synced 2024-12-24 22:05:31 +03:00
fq/format/inet/icmp.go
Mattias Wadman 1ddea1ada3 interp,format: Refactor registry usage and use function helpers
Move registry to interp and add support for functions and filesystems.
This will be used later for allow formats to add own functions and fq code.

Add gojqextra function helpers to have more comfortable API to add functions.
Takes care of argument type casting and JQValue:s and some more things.

Refactor interp package to use new function helper and registry. Probably
fixes a bunch of JQValue bugs and other type errors.

Refactor out some mpeg nal things to mpeg format.

Refactor interp jq code into display.q and init.jq.

Remove undocumented aes_ctr funciton, was a test. Hopefully will add more crypto things laster.
2022-07-16 19:24:13 +02:00

107 lines
3.8 KiB
Go

package inet
import (
"github.com/wader/fq/format"
"github.com/wader/fq/pkg/decode"
"github.com/wader/fq/pkg/interp"
"github.com/wader/fq/pkg/scalar"
)
func init() {
interp.RegisterFormat(decode.Format{
Name: format.ICMP,
Description: "Internet Control Message Protocol",
Groups: []string{format.IP_PACKET},
DecodeFn: decodeICMP,
})
}
// based on https://en.wikipedia.org/wiki/Internet_Control_Message_Protocol
var icmpTypeMap = scalar.UToScalar{
0: {Sym: "echo_reply", Description: "Echo reply"},
3: {Sym: "unreachable", Description: "Destination network unreachable"},
4: {Sym: "source_quench", Description: "Source quench (congestion control)"},
5: {Sym: "redirect", Description: "Redirect Datagram for the Network"},
6: {Description: "Alternate Host Address"},
8: {Sym: "echo_request", Description: "Echo request"},
9: {Sym: "router_advertisement", Description: "Router Advertisement"},
10: {Sym: "router_solicitation", Description: "Router discovery/selection/solicitation"},
11: {Sym: "time_exceeded", Description: "TTL expired in transit"},
12: {Sym: "parameter_problem", Description: "Pointer indicates the error"},
13: {Sym: "timestamp", Description: "Timestamp"},
14: {Sym: "timestamp_reply", Description: "Timestamp reply"},
15: {Sym: "information_request", Description: "Information Request"},
16: {Sym: "information_reply", Description: "Information Reply"},
17: {Sym: "address_mask_request", Description: "Address Mask Request"},
18: {Sym: "address_mask_reply", Description: "Address Mask Reply"},
30: {Sym: "traceroute", Description: "Information Request"},
31: {Description: "Datagram Conversion Error"},
32: {Description: "Mobile Host Redirect"},
33: {Description: "Where-Are-You (originally meant for IPv6)"},
34: {Description: "Here-I-Am (originally meant for IPv6)"},
35: {Description: "Mobile Registration Request"},
36: {Description: "Mobile Registration Reply"},
37: {Description: "Domain Name Request"},
38: {Description: "Domain Name Reply"},
39: {Description: "Simple Key-Management for Internet Protocol"},
40: {Sym: "photuris"},
41: {Description: "Experimental icmp for experimental mobility protocols"},
42: {Sym: "extended_echo_request", Description: "Request Extended Echo"},
43: {Sym: "extended_echo_reply", Description: "No Error"},
}
var icmpCodeMapMap = map[uint64]scalar.UToDescription{
3: {
1: "Destination host unreachable",
2: "Destination protocol unreachable",
3: "Destination port unreachable",
4: "Fragmentation required, and DF flag set",
5: "Source route failed",
6: "Destination network unknown",
7: "Destination host unknown",
8: "Source host isolated",
9: "Network administratively prohibited",
10: "Host administratively prohibited",
11: "Network unreachable for ToS",
12: "Host unreachable for ToS",
13: "Communication administratively prohibited",
14: "Host Precedence Violation",
15: "Precedence cutoff in effect",
},
5: {
0: "Redirect Datagram for the Network",
1: "Redirect Datagram for the Host",
2: "Redirect Datagram for the ToS & network",
3: "Redirect Datagram for the ToS & host",
},
11: {
0: "TTL expired in transit",
1: "Fragment reassembly time exceeded",
},
12: {
0: "Pointer indicates the error",
1: "Missing a required option",
2: "Bad length",
},
43: {
0: "No Error",
1: "Malformed Query",
2: "No Such Interface",
3: "No Such Table Entry",
4: "Multiple Interfaces Satisfy Query",
},
}
func decodeICMP(d *decode.D, in any) any {
if ipi, ok := in.(format.IPPacketIn); ok && ipi.Protocol != format.IPv4ProtocolICMP {
d.Fatalf("incorrect protocol %d", ipi.Protocol)
}
typ := d.FieldU8("type", icmpTypeMap)
d.FieldU8("code", icmpCodeMapMap[typ])
d.FieldU16("checksum")
d.FieldRawLen("content", d.BitsLeft())
return nil
}