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76 lines
2.4 KiB
76 lines
2.4 KiB
package main
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import (
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"os"
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"fmt"
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"bytes"
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"encoding/binary"
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"io/ioutil"
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)
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type IridiumSDB struct {
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ProtocolRevision byte
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MessageLength uint16
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Message MOMessage
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}
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type MOMessage struct {
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HeaderIEI byte
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HeaderLength uint16
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CDRReference uint32
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IMEI [15]byte
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Status byte
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MOMSN uint16
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MTMSN uint16
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SessionTime uint32
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}
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var SessionStatusString = []string{
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"The SBD session completed successfully.",
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"The MO message transfer, if any, was successful. The MT message queued at the Iridium Gateway is too large to be transferred within a single SBD session.",
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"The MO message transfer, if any, was successful. The reported location was determined to be of unacceptable quality. This value is only applicable to IMEIs using SBD protocol revision 1.",
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"", // 3
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"", // 4
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"", // 5
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"", // 6
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"", // 7
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"", // 8
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"", // 9
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"The SBD session timed out before session completion.",
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"", // 11
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"The MO message being transferred by the IMEI is too large to be transferred within a single SBD session.",
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"An RF link loss occurred during the SBD session.",
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"An IMEI protocol anomaly occurred during SBD session.",
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"The IMEI is prohibited from accessing the Iridium Gateway."}
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func main() {
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if len(os.Args) < 2 {
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fmt.Fprintf(os.Stderr, "required argument missing\n")
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os.Exit(1)
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}
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rdt, err := ioutil.ReadFile(os.Args[1])
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if err != nil {
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fmt.Fprintf(os.Stderr, "error reading %s: %s\n", os.Args[1], err.Error())
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os.Exit(1)
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}
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header := IridiumSDB{}
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buf := bytes.NewBuffer(rdt)
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err = binary.Read(buf, binary.BigEndian, &header)
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if err != nil {
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fmt.Fprintf(os.Stderr, "error parsing %s: %s\n", os.Args[1], err.Error())
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os.Exit(1)
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}
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fmt.Fprintf(os.Stdout, "Protocol Revision: %d\n", header.ProtocolRevision)
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fmt.Fprintf(os.Stdout, "Message Length: %d\n", header.MessageLength)
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fmt.Fprintf(os.Stdout, "MO Header IEI: %x\n", header.Message.HeaderIEI)
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fmt.Fprintf(os.Stdout, "MO Header Length: %d\n", header.Message.HeaderLength)
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fmt.Fprintf(os.Stdout, "CDR Reference: %d\n", header.Message.CDRReference)
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fmt.Fprintf(os.Stdout, "IMEI: %s\n", string(header.Message.IMEI[:]))
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fmt.Fprintf(os.Stdout, "Status: %s (%d)\n", SessionStatusString[header.Message.Status], header.Message.Status)
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fmt.Fprintf(os.Stdout, "MOMSN: %d\n", header.Message.MOMSN)
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fmt.Fprintf(os.Stdout, "MTMSN: %d\n", header.Message.MTMSN)
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fmt.Fprintf(os.Stdout, "Session Time: %d\n", header.Message.SessionTime)
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}
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