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69 lines
1.9 KiB
69 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 TCPDescriber struct {
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TCP *parser.TCP
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}
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func (t *TCPDescriber) GetHeader() []byte {
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return t.TCP.Header
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}
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func (t *TCPDescriber) GetDetailDescribe() Describe {
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tcpFlags := make([]string, 0)
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if t.TCP.NS {
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tcpFlags = append(tcpFlags, "NS")
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}
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if t.TCP.CWR {
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tcpFlags = append(tcpFlags, "CWR")
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}
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if t.TCP.ECE {
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tcpFlags = append(tcpFlags, "ECE")
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}
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if t.TCP.URG {
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tcpFlags = append(tcpFlags, "URG")
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}
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if t.TCP.ACK {
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tcpFlags = append(tcpFlags, "ACK")
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}
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if t.TCP.PSH {
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tcpFlags = append(tcpFlags, "PSH")
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}
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if t.TCP.RST {
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tcpFlags = append(tcpFlags, "RST")
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}
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if t.TCP.SYN {
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tcpFlags = append(tcpFlags, "SYN")
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}
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if t.TCP.FIN {
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tcpFlags = append(tcpFlags, "FIN")
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}
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optionDescribe := make([]map[string]string, 0)
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for _, option := range t.TCP.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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return Describe{
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1: {"源端口号", fmt.Sprintf("%d", t.TCP.SrcPort)},
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2: {"目的端口号", fmt.Sprintf("%d", t.TCP.DstPort)},
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3: {"序列号", fmt.Sprintf("%d", t.TCP.Seq)},
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4: {"确认号", fmt.Sprintf("%d", t.TCP.Ack)},
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5: {"数据偏移", fmt.Sprintf("%d", t.TCP.DataOffset)},
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6: {"标志符", fmt.Sprintf("%v", tcpFlags)},
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7: {"窗口", fmt.Sprintf("%d", t.TCP.Window)},
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8: {"校验和", fmt.Sprintf("%d", t.TCP.Checksum)},
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9: {"紧急指针", fmt.Sprintf("%d", t.TCP.Urgent)},
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10: {"可选字段", fmt.Sprintf("%+v", optionDescribe)},
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11: {"填充", fmt.Sprintf("%d", len(t.TCP.Padding))},
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}
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}
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