mirror of
https://github.com/wader/fq.git
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94 lines
3.5 KiB
Go
94 lines
3.5 KiB
Go
package inet
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import (
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"github.com/wader/fq/format"
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"github.com/wader/fq/pkg/decode"
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"github.com/wader/fq/pkg/interp"
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"github.com/wader/fq/pkg/scalar"
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)
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func init() {
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interp.RegisterFormat(
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format.ICMPv6,
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&decode.Format{
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Description: "Internet Control Message Protocol v6",
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Groups: []*decode.Group{format.IP_Packet},
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DecodeFn: decodeICMPv6,
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})
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}
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// based on https://en.wikipedia.org/wiki/Internet_Control_Message_Protocol_for_IPv6
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var icmpv6TypeMap = scalar.UintMap{
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1: {Sym: "unreachable", Description: "Destination unreachable"},
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2: {Sym: "too_big", Description: "Packet too big"},
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3: {Sym: "time_exceeded", Description: "Time exceeded"},
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4: {Sym: "parameter_problem", Description: "Parameter problem"},
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100: {Description: "Private experimentation"},
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101: {Description: "Private experimentation"},
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127: {Description: "Reserved for expansion of ICMPv6 error messages"},
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128: {Sym: "echo_reply", Description: "Echo Request"},
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129: {Sym: "echo_request", Description: "Echo Reply"},
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130: {Description: "Multicast Listener Query (MLD)"},
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131: {Description: "Multicast Listener Report (MLD)"},
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132: {Description: "Multicast Listener Done (MLD)"},
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133: {Description: "Router Solicitation (NDP)"},
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134: {Description: "Router Advertisement (NDP)"},
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135: {Description: "Neighbor Solicitation (NDP)"},
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136: {Description: "Neighbor Advertisement (NDP)"},
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137: {Description: "Redirect Message (NDP)"},
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138: {Description: "Router Renumbering Router Renumbering Command"},
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139: {Description: "ICMP Node Information Query"},
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140: {Description: "ICMP Node Information Response"},
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141: {Description: "Inverse Neighbor Discovery Solicitation Message"},
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142: {Description: "Inverse Neighbor Discovery Advertisement Message"},
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143: {Description: "Multicast Listener Discovery (MLDv2) reports (RFC 3810)"},
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144: {Description: "Home Agent Address Discovery Request Message"},
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145: {Description: "Home Agent Address Discovery Reply Message"},
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146: {Description: "Mobile Prefix Solicitation"},
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147: {Description: "Mobile Prefix Advertisement"},
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148: {Description: "Certification Path Solicitation (SEND)"},
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149: {Description: "Certification Path Advertisement (SEND)"},
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151: {Description: "Multicast Router Advertisement (MRD)"},
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152: {Description: "Multicast Router Solicitation (MRD)"},
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153: {Description: "Multicast Router Termination (MRD)"},
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155: {Description: "RPL Control Message"},
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200: {Description: "Private experimentation"},
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201: {Description: "Private experimentation"},
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255: {Description: "Reserved for expansion of ICMPv6 informational messages"},
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}
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var icmpv6CodeMapMap = map[uint64]scalar.UintMapDescription{
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1: {
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1: "Communication with destination administratively prohibited",
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2: "Beyond scope of source address",
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3: "Address unreachable",
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4: "Port unreachable",
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5: "Source address failed ingress/egress policy",
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6: "Reject route to destination",
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7: "Error in Source Routing Header",
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},
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3: {
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0: "Hop limit exceeded in transit",
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1: "Fragment reassembly time exceeded",
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},
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4: {
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0: "Erroneous header field encountered",
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1: "Unrecognized Next Header type encountered",
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2: "Unrecognized IPv6 option encountered",
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},
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}
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func decodeICMPv6(d *decode.D) any {
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var ipi format.IP_Packet_In
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if d.ArgAs(&ipi) && ipi.Protocol != format.IPv4ProtocolICMPv6 {
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d.Fatalf("incorrect protocol %d", ipi.Protocol)
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}
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typ := d.FieldU8("type", icmpv6TypeMap)
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d.FieldU8("code", icmpv6CodeMapMap[typ])
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d.FieldU16("checksum")
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d.FieldRawLen("content", d.BitsLeft())
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return nil
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}
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