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61 lines
1.9 KiB
61 lines
1.9 KiB
package describer
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import (
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"encoding/hex"
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"eruhs/core/parser"
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"fmt"
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)
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type IPv4Describer struct {
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IPv4 *parser.IPv4
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}
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func (i *IPv4Describer) GetHeader() []byte {
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return i.IPv4.Header
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}
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func (i *IPv4Describer) GetDetailDescribe() Describe {
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optionDescribe := make([]map[string]string, 0)
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for _, option := range i.IPv4.Options {
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optionDescribe = append(optionDescribe, map[string]string{
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"类型": fmt.Sprintf("%d", option.OptionType),
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"长度": fmt.Sprintf("%d", option.OptionLength),
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"数据": hex.EncodeToString(option.OptionData),
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})
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}
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protoName := ""
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switch i.IPv4.Protocol {
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case parser.IPv4ProtoICMP:
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protoName = "ICMP"
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case parser.IPv4ProtoIGMP:
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protoName = "IGMP"
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case parser.IPv4ProtoTCP:
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protoName = "TCP"
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case parser.IPv4ProtoUDP:
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protoName = "UDP"
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case parser.IPv4ProtoENCAP:
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protoName = "ENCAP"
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case parser.IPv4ProtoOSPF:
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protoName = "OSPF"
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case parser.IPv4ProtoSCTP:
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protoName = "SCTP"
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}
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return Describe{
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1: {"版本", fmt.Sprintf("%d", i.IPv4.Version)},
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2: {"首部长度", fmt.Sprintf("%d", i.IPv4.IHL)},
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3: {"区分服务", fmt.Sprintf("%d", i.IPv4.DS)},
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4: {"总长", fmt.Sprintf("%d", i.IPv4.TotalLength)},
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5: {"标识符", fmt.Sprintf("%d", i.IPv4.Id)},
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6: {"标志", fmt.Sprintf("%d", i.IPv4.Flags)},
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7: {"分片偏移", fmt.Sprintf("%d", i.IPv4.FragOffset)},
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8: {"存活时间", fmt.Sprintf("%d", i.IPv4.TTL)},
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9: {"应用层协议", protoName},
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10: {"首部校验和", fmt.Sprintf("%d", i.IPv4.Checksum)},
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11: {"源地址", i.IPv4.SrcIP.String()},
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12: {"目的地址", i.IPv4.DstIP.String()},
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13: {"选项字段", fmt.Sprintf("%+v", optionDescribe)},
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14: {"填充", fmt.Sprintf("%d Byte", len(i.IPv4.Padding))},
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}
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}
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