637 lines
16 KiB
Go
637 lines
16 KiB
Go
package main
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import (
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"encoding/binary"
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"encoding/hex"
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"fmt"
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"net"
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"os"
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"os/exec"
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"strings"
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"sync"
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"be.ems/captrace/config"
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"be.ems/lib/dborm"
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"be.ems/lib/global"
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"be.ems/lib/log"
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_ "github.com/go-sql-driver/mysql"
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"golang.org/x/net/http/httpguts"
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"golang.org/x/net/http2/hpack"
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)
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// goroutine
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var limitChan = make(chan bool, 1024)
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const (
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GTPU_V1_VERSION = 1 << 5
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GTPU_VER_MASK = 7 << 5
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GTPU_PT_GTP = 1 << 4
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GTPU_HEADER_LEN = 12
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GTPU_E_S_PB_BIT = 7
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GTPU_E_BI = 1 << 2
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)
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const (
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GTPU_HEADER_VERSION_INDEX = 0
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GTPU_HEADER_MSG_TYPE_INDEX = 1
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GTPU_HEADER_LENGTH_INDEX = 2
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GTPU_HEADER_TEID_INDEX = 4
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)
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type ExtHeader struct {
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TaskId uint32
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IMSI string
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IfType byte
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MsgType byte
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MsgDirect byte // 0-recv,1-send
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TimeStamp int64
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SrcIP string
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DstIP string
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SrcPort uint16
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DstPort uint16
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Proto int
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PPI int // only for SCTP
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DataLen uint16
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DataInfo []byte
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}
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type MsgInfo struct {
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TaskId uint32
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TimeStamp int64
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IfType byte
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MsgType byte
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MsgDirect byte
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SrcAddr string // IP:Port
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DstAddr string // IP:Port
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}
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// func (fr *Framer) ReadFrame() (Frame, error)
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// ReadMetaHeaders *hpack.Decoder
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func validWireHeaderFieldName(v string) bool {
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if len(v) == 0 {
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return false
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}
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for _, r := range v {
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if !httpguts.IsTokenRune(r) {
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return false
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}
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if 'A' <= r && r <= 'Z' {
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return false
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}
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}
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return true
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}
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// tshark -r gtp.pcap -T json -d tcp.port==8080,http2 -Y "http2"
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// -T pdml: Packet Details Markup Language
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// -T psml: Packet Summary Markup Language
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func execTshark(filename string, proto string) {
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pcapPath := filename
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tshark := exec.Command("tshark", "-r"+pcapPath,
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"-Y"+proto,
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"-T", "pdml")
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out, err := tshark.CombinedOutput()
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if err != nil {
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log.Errorf("Failed to exec tshark:", err)
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} else {
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log.Debug("combined out:", string(out))
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}
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}
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const magicMicroseconds = 0xa1b2c3d4
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const versionMajor = 2
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const versionMinor = 4
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func WriteEmptyPcap(filename string, timestamp int64, length int, data []byte) error {
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var cooked = [...]byte{0x00, 0x00, 0x03, 0x04, 0x00, 0x06, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x08, 0x00}
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var buf []byte
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//24+16+16 = 56
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buf = make([]byte, 56+length)
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binary.LittleEndian.PutUint32(buf[0:4], magicMicroseconds)
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binary.LittleEndian.PutUint16(buf[4:6], versionMajor)
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binary.LittleEndian.PutUint16(buf[6:8], versionMinor)
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// bytes 8:12 stay 0 (timezone = UTC)
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// bytes 12:16 stay 0 (sigfigs is always set to zero, according to
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// http://wiki.wireshark.org/Development/LibpcapFileFormat
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binary.LittleEndian.PutUint32(buf[16:20], 0x00040000)
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binary.LittleEndian.PutUint32(buf[20:24], 0x00000071)
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// Packet Header
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binary.LittleEndian.PutUint64(buf[24:32], uint64(timestamp))
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binary.LittleEndian.PutUint32(buf[32:36], uint32(length+16))
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binary.LittleEndian.PutUint32(buf[36:40], uint32(length+16))
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copy(buf[40:], cooked[:])
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copy(buf[56:], data[:])
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err := os.WriteFile(filename, buf[:], 0644)
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//log.Debugf("CAP: %v\n", buf)
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return err
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}
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func ngapDataHandle(emsg []byte, timestamp int64, data []byte) int {
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filePath := fmt.Sprintf("/tmp/ng%d.pcap", timestamp)
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err := WriteEmptyPcap(filePath, timestamp, len(data), data)
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if err != nil {
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log.Error("Failed to tshark:", err)
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return -1
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} else {
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execTshark(filePath, "ngap")
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}
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return 0
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}
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func pfcpDataHandle(emsg []byte, timestamp int64, data []byte) int {
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filePath := fmt.Sprintf("/tmp/pf%d.pcap", timestamp)
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err := WriteEmptyPcap(filePath, timestamp, len(data), data)
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if err != nil {
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log.Error("Failed to tshark:", err)
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} else {
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execTshark(filePath, "pfcp")
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}
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return 0
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}
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func httpDataHandle(emsg []byte, timestamp int64, data []byte) int {
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filePath := fmt.Sprintf("/tmp/sb%d.pcap", timestamp)
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err := WriteEmptyPcap(filePath, timestamp, len(data), data)
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if err != nil {
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log.Error("Failed to tshark:", err)
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} else {
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execTshark(filePath, "http2")
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}
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return 0
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}
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func httpHeaderDataHandle(emsg []byte, header []byte, data []byte) int {
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var remainSize = uint32(16 << 20)
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var sawRegular bool
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var invalid bool // pseudo header field errors
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var Fields []hpack.HeaderField
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invalid = false
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hdec := hpack.NewDecoder(4096, nil)
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hdec.SetEmitEnabled(true)
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hdec.SetMaxStringLength(int(16 << 20))
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hdec.SetEmitFunc(func(hf hpack.HeaderField) {
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if !httpguts.ValidHeaderFieldValue(hf.Value) {
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// Don't include the value in the error, because it may be sensitive.
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invalid = true
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}
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isPseudo := strings.HasPrefix(hf.Name, ":")
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if isPseudo {
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if sawRegular {
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invalid = true
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}
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} else {
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sawRegular = true
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if !validWireHeaderFieldName(hf.Name) {
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invalid = true
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}
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}
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if invalid {
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hdec.SetEmitEnabled(false)
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return
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}
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size := hf.Size()
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if size > remainSize {
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hdec.SetEmitEnabled(false)
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//mh.Truncated = true
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return
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}
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remainSize -= size
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Fields = append(Fields, hf)
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})
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// defer hdec.SetEmitFunc(func(hf hpack.HeaderField) {})
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frag := header
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if _, err := hdec.Write(frag); err != nil {
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return -1
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}
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if err := hdec.Close(); err != nil {
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return -1
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}
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hdec.SetEmitFunc(func(hf hpack.HeaderField) {})
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var headers []byte
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var line string
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for i := range Fields {
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line = fmt.Sprintf("\"%s\":\"%s\",", Fields[i].Name, Fields[i].Value)
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headers = append(headers, []byte(line)...)
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}
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if data != nil && len(data) > 0 {
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encode := fmt.Sprintf("%s \"content\":%s\n", string(headers), string(data))
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emsg = append(emsg, []byte(encode)...)
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log.Debug("encode:", string(encode))
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} else {
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log.Debug("headers:", string(headers))
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emsg = append(emsg, []byte(headers)...)
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}
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return 0
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}
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func gtpuHandler(rvMsg []byte, rvLen int) {
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var extHdr ExtHeader
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var tr dborm.TraceData
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var off, ret int
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msg := rvMsg
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verFlags := msg[GTPU_HEADER_VERSION_INDEX]
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gtpuHdrLen := GTPU_HEADER_LEN
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localTeid := binary.BigEndian.Uint32(msg[GTPU_HEADER_TEID_INDEX:])
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extHdr.TaskId = localTeid
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if (verFlags & GTPU_E_S_PB_BIT) != 0 {
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if (verFlags & GTPU_E_BI) != 0 {
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extTypeIndex := GTPU_HEADER_LEN - 1
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extType := msg[extTypeIndex]
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if extType == 0xFE {
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extHdr.IMSI = string(msg[extTypeIndex+2 : extTypeIndex+17])
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extHdr.IfType = msg[extTypeIndex+17]
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extHdr.MsgType = msg[extTypeIndex+18]
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extHdr.MsgDirect = msg[extTypeIndex+19]
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extHdr.TimeStamp = int64(binary.BigEndian.Uint64(msg[extTypeIndex+19:]))
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log.Debugf("ext info %v %s %d %d %d", msg[(extTypeIndex+2):(extTypeIndex+20)], extHdr.IMSI, extHdr.IfType, extHdr.MsgType, extHdr.MsgDirect)
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// set offset of IP Packet
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off = 40 + 4
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//src ip: msg+40+12
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extHdr.SrcIP = fmt.Sprintf("%d.%d.%d.%d", msg[off+12], msg[off+13], msg[off+14], msg[off+15])
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//dst ip: msg+40+12+4
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extHdr.DstIP = fmt.Sprintf("%d.%d.%d.%d", msg[off+16], msg[off+17], msg[off+18], msg[off+19])
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extHdr.SrcPort = uint16(binary.BigEndian.Uint16(msg[off+20:]))
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extHdr.DstPort = uint16(binary.BigEndian.Uint16(msg[off+22:]))
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log.Debugf("info %s:%d %s:%d", extHdr.SrcIP, extHdr.SrcPort, extHdr.DstIP, extHdr.DstPort)
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// ip header start msg+40
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tr.TaskID = int(extHdr.TaskId)
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tr.Timestamp = extHdr.TimeStamp
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tr.Imsi = extHdr.IMSI
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tr.IfType = int(extHdr.IfType)
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tr.SrcAddr = fmt.Sprintf("%s:%d", extHdr.SrcIP, extHdr.SrcPort)
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tr.DstAddr = fmt.Sprintf("%s:%d", extHdr.DstIP, extHdr.DstPort)
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tr.MsgType = int(extHdr.MsgType)
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tr.MsgDirect = int(extHdr.MsgDirect)
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tr.Length = int(rvLen - off)
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tr.RawMsg = make([]byte, int(rvLen-off))
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copy(tr.RawMsg, []byte(msg[off:]))
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extHdr.Proto = int(msg[off+9])
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if extHdr.Proto == 132 { //SCTP
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extHdr.PPI = int(msg[off+47])
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extHdr.DataLen = uint16(binary.BigEndian.Uint16(msg[(off+34):]) - 16)
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log.Debugf("dat len %d %d", extHdr.DataLen, extHdr.PPI)
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if extHdr.PPI == 60 { // NGAP
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extHdr.DataInfo = make([]byte, extHdr.DataLen)
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copy(extHdr.DataInfo, msg[(off+48):])
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//append(extHdr.DataInfo, msg[88:]...)
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log.Debugf("dataInfo %v", extHdr.DataInfo)
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ret = ngapDataHandle([]byte(tr.DecMsg), tr.Timestamp, tr.RawMsg)
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}
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} else if extHdr.Proto == 6 { // TCP
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iplen := uint16(binary.BigEndian.Uint16(msg[off+2:]))
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tcplen := uint16(iplen - 32 - 20)
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hdrlen := uint16(binary.BigEndian.Uint16(msg[off+20+32+1:]))
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offset := uint16(off + 52)
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log.Debugf("HTTP %d %d %d\n", iplen, tcplen, hdrlen)
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extHdr.DataLen = tcplen
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extHdr.DataInfo = make([]byte, extHdr.DataLen)
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copy(extHdr.DataInfo, msg[offset:])
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//ret = httpDataHandle(tr.DecodedMsg, tr.Timestamp, tr.RawMsg)
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if tcplen > (hdrlen + 9) { // has data
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doffset := uint16(offset + hdrlen + 9)
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datlen := uint16(binary.BigEndian.Uint16(msg[doffset+1:]))
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log.Debugf("HTTP datlen %d", datlen)
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ret = httpHeaderDataHandle([]byte(tr.DecMsg), msg[offset+9:offset+9+hdrlen], msg[doffset+9:doffset+datlen+9])
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} else {
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ret = httpHeaderDataHandle([]byte(tr.DecMsg), msg[offset+9:hdrlen], nil)
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}
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} else if extHdr.Proto == 17 { // UDP
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ilen := uint16(binary.BigEndian.Uint16(msg[off+2:]))
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udplen := uint16(ilen - 20)
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extHdr.DataLen = udplen - 8
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extHdr.DataInfo = make([]byte, extHdr.DataLen)
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copy(extHdr.DataInfo, msg[off+27:])
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ret = pfcpDataHandle([]byte(tr.DecMsg), tr.Timestamp, tr.RawMsg)
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}
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if ret < 0 {
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log.Error("Decode message error")
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} else {
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PutTraceRecordToDB(&tr)
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}
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}
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for extType != 0 && extTypeIndex < rvLen {
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extLen := msg[extTypeIndex+1] << 2
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if extLen == 0 {
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log.Error("error, extLen is zero")
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return
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}
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gtpuHdrLen += int(extLen)
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extTypeIndex += int(extLen)
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extType = msg[extTypeIndex]
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}
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}
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} else {
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gtpuHdrLen -= 4
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}
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}
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func udpProcess(conn *net.UDPConn) {
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data := make([]byte, 2048)
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n, _, err := conn.ReadFromUDP(data)
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if err != nil {
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log.Error("failed read udp msg, error: " + err.Error())
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}
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gtpuHandler(data, n)
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//str := string(data[:n])
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//log.Error("receive from client, data:" + str)
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<-limitChan
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}
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func udpServer(address string) {
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udpAddr, err := net.ResolveUDPAddr("udp", address)
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if err != nil {
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log.Error("Failed to ResolveUDPAddr:", err)
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os.Exit(1)
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}
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conn, err := net.ListenUDP("udp", udpAddr)
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if err != nil {
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log.Error("read from connect failed, err:", err)
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os.Exit(1)
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}
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defer conn.Close()
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for {
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limitChan <- true
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go udpProcess(conn)
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}
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}
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//SCTP OFFSET = 48
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//HTTP2 OFFSET = 52
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//UDP OFFSET = 28
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func PutTraceRecordToDB(tr *dborm.TraceData) error {
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var offset, ret int
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if tr.IfType == 1 || tr.IfType == 2 { // SCTP
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offset = 48
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ret = ngapDataHandle([]byte(tr.DecMsg), tr.Timestamp, tr.RawMsg[offset:])
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} else if tr.IfType == 4 { // UDP
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offset = 28
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ret = pfcpDataHandle([]byte(tr.DecMsg), tr.Timestamp, tr.RawMsg[offset:])
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} else { // HTTP2
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iplen := uint16(binary.BigEndian.Uint16(tr.RawMsg[2:]))
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tcplen := uint16(iplen - 32 - 20)
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hdrlen := uint16(binary.BigEndian.Uint16(tr.RawMsg[20+32+1:]))
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offset = 52
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if tcplen > (hdrlen + 9) { // has data
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doffset := uint16(uint16(offset) + hdrlen + 9)
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datlen := uint16(binary.BigEndian.Uint16(tr.RawMsg[doffset+1:]))
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log.Debugf("HTTP datlen %d\n", datlen)
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ret = httpHeaderDataHandle([]byte(tr.DecMsg), tr.RawMsg[offset+9:offset+9+int(hdrlen)], tr.RawMsg[doffset+9:doffset+datlen+9])
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} else {
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ret = httpHeaderDataHandle([]byte(tr.DecMsg), tr.RawMsg[offset+9:hdrlen], nil)
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}
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}
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if ret == 0 {
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_, err := dborm.XormInsertTraceData(tr)
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if err != nil {
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log.Error("Failed to dborm.XormInsertTraceData:", err)
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return err
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}
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}
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return nil
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}
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// ////////////////
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// var rdb *redis.Client
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// var redisOn bool
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// var rurl string
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//
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// func RdbInitClient(Url string) (err error) {
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// rurl = Url
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// rdb = redis.NewClient(&redis.Options{
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// Addr: rurl,
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// Password: "", // no password set
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// DB: 0, // use default
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// })
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//
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// ctx, cancel := context.WithTimeout(context.Background(), 2*time.Second)
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// defer cancel()
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//
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// _, err = rdb.Ping(ctx).Result()
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// if err != nil {
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// log.Debugf("db connect failed\n")
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// return err
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// }
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// return nil
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// }
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//
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// func RdbKeys(filter string) (vals []string, err error) {
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// ctx := context.Background()
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//
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// vals, err = rdb.Keys(ctx, filter).Result()
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//
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// if err != nil {
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// log.Error("db: Keys ", err.Error())
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// return nil, err
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// }
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//
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// return vals, nil
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// }
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//
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// func RdbHGetAll(key string) (kvs map[string]string, err error) {
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// ctx := context.Background()
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// kvs, err = rdb.HGetAll(ctx, key).Result()
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//
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// if err != nil {
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// log.Error("db: HGetAll ", err.Error())
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// return nil, err
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// }
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//
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// return kvs, nil
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// }
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//
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// func RdbHMSet(key string, kvs map[string]interface{}) (err error) {
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// ctx := context.Background()
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// err = rdb.HMSet(ctx, key, kvs).Err()
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//
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// if err != nil {
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// log.Error("db: HMSet ", err.Error())
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// return err
|
||
// }
|
||
//
|
||
// return nil
|
||
// }
|
||
//
|
||
// func RdbDel(key string) (err error) {
|
||
// ctx := context.Background()
|
||
// err = rdb.Del(ctx, key).Err()
|
||
//
|
||
// if err != nil {
|
||
// log.Error("db: Del ", err.Error())
|
||
// return err
|
||
// }
|
||
//
|
||
// return nil
|
||
// }
|
||
//
|
||
// func rdbClient(url string) {
|
||
// var err error
|
||
// var kvs map[string]string
|
||
// var vals []string
|
||
// var tr TraceRecord
|
||
//
|
||
// err = RdbInitClient(url)
|
||
//
|
||
// if err != nil {
|
||
// log.Debugf("db: RdbInitClient err\n")
|
||
// os.Exit(2)
|
||
// }
|
||
//
|
||
// for {
|
||
// vals, err = RdbKeys("tsk*") // (vals []string, err error)
|
||
// if err == nil {
|
||
// for i := range vals {
|
||
// kvs, err = RdbHGetAll(vals[i]) //(kvs map[string]string, err error)
|
||
// if err == nil {
|
||
// //tsk-1:1682764180993584177:460000100000001:8
|
||
// log.Debugf("%d: %s %s %s %v\n", i, vals[i], kvs["srcip"], kvs["dstip"], []byte(kvs["ipdat"]))
|
||
// arr := strings.Split(vals[i], ":")
|
||
// if arr != nil && len(arr) == 4 {
|
||
// tr.Taskid, _ = strconv.Atoi(arr[0][4:])
|
||
// tr.Timestamp, _ = strconv.ParseInt(arr[1], 10, 64)
|
||
//
|
||
// tr.Imsi = arr[2]
|
||
// tr.IfType, _ = strconv.Atoi(arr[3])
|
||
//
|
||
// }
|
||
// tr.SrcAddr = fmt.Sprintf("%s:d", kvs["srcip"], kvs["srcport"])
|
||
// tr.DstAddr = fmt.Sprintf("%s:d", kvs["dstip"], kvs["dstport"])
|
||
// tr.MsgType, _ = strconv.Atoi(kvs["msgtp"])
|
||
// tr.MsgDirect, _ = strconv.Atoi(kvs["direct"])
|
||
// rawlen, _ := strconv.Atoi(kvs["datlen"])
|
||
// tr.RawMsg = make([]byte, rawlen)
|
||
// copy(tr.RawMsg, []byte(kvs["ipdat"]))
|
||
// //tr.DecodedMsg
|
||
// PutTraceRecordToDB(&tr)
|
||
//
|
||
// //RdbDel(vals[i])
|
||
// }
|
||
//
|
||
// }
|
||
// }
|
||
// time.Sleep(time.Second * 5)
|
||
// }
|
||
// }
|
||
|
||
// DataBase Connnection
|
||
|
||
//func QueryMultiRowDemo() {
|
||
// //InitMysql()
|
||
// sqlStr := "SELECT id,sname,age FROM student WHERE id = ?"
|
||
// rows, err := dbc.Query(sqlStr, 1)
|
||
// if err != nil {
|
||
// log.Debugf("query failed, err:%v\n", err)
|
||
// return
|
||
// }
|
||
// // 非常重要：关闭rows释放持有的数据库链接
|
||
// defer rows.Close()
|
||
//
|
||
// // 循环读取结果集中的数据
|
||
// for rows.Next() {
|
||
// var u User
|
||
// err := rows.Scan(&u.id, &u.name, &u.age)
|
||
// if err != nil {
|
||
// log.Debugf("scan failed, err:%v\n", err)
|
||
// return
|
||
// }
|
||
// //log.Debugf("id:%d name:%s age:%d\n", u.id, u.name, u.age)
|
||
// }
|
||
//}
|
||
|
||
func ToHtml(path string, timestamp string, port string, ipDaTA []byte) {
|
||
log.Trace("byte数据:", ipDaTA)
|
||
encodedStr := hex.EncodeToString(ipDaTA)
|
||
// [72 101 108 108 111]
|
||
log.Trace(encodedStr)
|
||
command := fmt.Sprintf("/usr/local/bin/data2html -f %s -t %s -i %s -d %s", path, timestamp, port, encodedStr)
|
||
log.Trace("commm:", command)
|
||
cmd := exec.Command("sh", "-c", command)
|
||
_, err := cmd.CombinedOutput()
|
||
|
||
if err != nil {
|
||
log.Error("Error:can not obtain stdout pipe for command:", err)
|
||
return
|
||
}
|
||
//执行命令
|
||
}
|
||
|
||
func main() {
|
||
conf := config.GetYamlConfig()
|
||
|
||
log.InitLogger(conf.Logger.File, conf.Logger.Duration, conf.Logger.Count, "omc:captrace", config.GetLogLevel())
|
||
log.Debugf("OMC captrace version: %s\n", global.Version)
|
||
log.Infof("========================= OMC captrace startup =========================")
|
||
log.Infof("OMC captrace version: %s %s %s", global.Version, global.BuildTime, global.GoVer)
|
||
err := dborm.InitDbClient(conf.Database.Type, conf.Database.User, conf.Database.Password,
|
||
conf.Database.Host, conf.Database.Port, conf.Database.Name)
|
||
if err != nil {
|
||
fmt.Println("dborm.initDbClient err:", err)
|
||
os.Exit(2)
|
||
}
|
||
|
||
var wg sync.WaitGroup
|
||
wg.Add(1)
|
||
|
||
udpServer(conf.Gtp.Addr)
|
||
|
||
wg.Wait()
|
||
}
|