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Usage example

$ ./diadecode.py -m M-t7740-i0000-fef-d33-r8000-p0183032233d2efef00000001011000ef000000000000000000000000000000000000000000000000000000000000000000000000000000000 0000000 Found definition: type SCP_MSG_CONFIG (0x7740) in sccp.db Field description: type SCP_MSG_CONFIG (0x7740) Field description: id 0 Field description: src Sending module_id Field description: dst SCP_TASK_ID Field description: rsp_req used to request a confirmation Field description: hclass 0 Field description: status 0 Field description: err_info 0 Field description: len 60 d: 33 f: ef i: 0000 p: 0183032233d2efef00000001011000ef000000000000000000000000000000000000000000000000000000000000000000000000000000000 r: 8000 t: 7740 decompose(0183032233d2efef00000001011000ef000000000000000000000000000000000000000000000000000000000000000000000000000000000) Offset + description: 0 1 cnf_ver - must be set to one cnf_ver= 0x01 (cnf_ver - must be set to one) Offset + description: 1 1 sio - Service Information Octet value sio= 0x83 (sio - Service Information Octet value) Offset + description: 2 2 options options= 0x0322 (options) Offset + description: 4 1 module_id - SCCP module id module_id= 0x33 (module_id - SCCP module id) Offset + description: 5 1 mtp_id - MTP module id mtp_id= 0xd2 (mtp_id - MTP module id) Offset + description: 6 1 mngt_id - Management module id mngt_id= 0xef (mngt_id - Management module id) Offset + description: 7 1 maint_id - Maintenance module id maint_id= 0xef (maint_id - Maintenance module id) Offset + description: 8 4 point_code - Local point code point_code= 0x00000001 (point_code - Local point code) Offset + description: 12 2 max_sif max_sif= 0x0110 (max_sif) Offset + description: 14 1 sccp_instance sccp_instance= 0x00 (sccp_instance) Offset + description: 15 1 smb_id - Broadcast module id smb_id= 0xef (smb_id - Broadcast module id) Offset + description: 16 2 smb_flags - Broadcast flags smb_flags= 0x0000 (smb_flags - Broadcast flags) Offset + description: 18 2 num_uc - Required number of User num_uc= 0x0000 (num_uc - Required number of User connections) Offset + description: 20 2 uc_onset - Onset of congestion point for user uc_onset= 0x0000 (uc_onset - Onset of congestion point for user connections) Offset + description: 22 2 uc_abmt uc_abmt= 0x0000 (uc_abmt) Offset + description: 24 2 num_ic num_ic= 0x0000 (num_ic) Offset + description: 26 2 ic_onset ic_onset= 0x0000 (ic_onset) Offset + description: 28 2 ic_abmt ic_abmt= 0x0000 (ic_abmt) Offset + description: 30 2 num_data num_data= 0x0000 (num_data) Offset + description: 32 2 data_onset data_onset= 0x0000 (data_onset) Offset + description: 34 2 data_abmt data_abmt= 0x0000 (data_abmt) Offset + description: 36 2 num_edata num_edata= 0x0000 (num_edata Section 10 Non-Primitive Interface page 57 MESSAGE HEADER FIELD NAME MEANING) Offset + description: 38 2 edata_onset edata_onset= 0x0000 (edata_onset) Offset + description: 40 2 edata_abmt edata_abmt= 0x0000 (edata_abmt) Offset + description: 42 2 ext_options ext_options= 0x0000 (ext_options) Offset + description: 44 2 base_id base_id= 0x0000 (base_id) Offset + description: 46 2 top_id top_id= 0x0000 (top_id) Offset + description: 48 2 min_id min_id= 0x0000 (min_id) Offset + description: 50 2 max_id max_id= 0x0000 (max_id) Offset + description: 52 1 isup_id isup_id= 0x00 (isup_id) Offset + description: 53 2 nc nc= 0x0000 (nc) Offset + description: 55 1 hop_counter hop_counter= 0x00 (hop_counter) Offset + description: 56 2 error_offset error_offset= 0x0 (error_offset) Offset + description: 58 2 reserved – set to zero reserved= 0x (reserved – set to zero ) 01 83 0322 33 d2 ef ef 00000001 0110 00 ef 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 00 0000 00 0 $

Usage help

$ ./diadecode.py

Created by Philippe Langlois on 2009-11-11.
Copyright © 2009 P1 Security. All rights reserved.
http://www.p1security.com/

Usage:
diadecode.py [ m | -l “” ]
“-h”, "-help":
this message
“-m”, “—message”:
message you want to decode

Example:
./diadecode.py -m M-t7740-i0000-fef-d33-r8000-p018381063322efef00000002011000ef001c000000000000000000000000000000000000000000000000000000000000000000000000000000000000
./diadecode.py -m M-t7780-i0000-fef-d14-r8000-p001415339e9e00000000002000400040000080000410080200ff0000000000000000000000000000
./diadecode.py -l “S7L:I0000 M t3741 i0000 f33 def r0000 s06 e00000000 p00031401000000000800000000000000000000000000000000000000000000000000000000000000”

Configuration for s7_play for Dialogic are not really super clear:
**************************************************************

• SCCP Configuration.
  **************************************************************
• Issue configuration message to the SCCP module:
• —maint_id
• -mod_id -—SMB flags
• --options -——-pc —SMB id
• —sio —mgmt_id —SCCP inst
• -ver —mtp_id -—max_sif — num_uc
  M-t7740-i0000-fef-d33-r8000-p018303223322efef00000002011000ef0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000

Logs from Dialogic are typically cryptic:
S7L:I0000 M t32da i0000 fd2 def r0000 s00 e00000000 p0002000000010000000100000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
S7L:I0000 M t02f0 i0000 fd2 def r0000 s00 e00000000 p0000000100020000000000010000000100000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
S7L:I0000 M t02db i0000 fd2 def r0000 s00 e00000000 p00000002
S7L:I0000 M t02e0 i0000 fd2 def r0000 s00 e00000000 p0002
S7L:I0000 M t0762 i7740 f33 def r0000 s05 e000000cd
S7L:I0000 SCCP Software event : SCPSWE_BAD_MSG
S7L:I0000 M t3740 i0000 f33 def r0000 s05 e00000000 p018303223322efef00000001011000ef0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
S7L:I0000 M t3741 i0000 f33 def r0000 s06 e00000000 p00031401000000000800000000000000000000000000000000000000000000000000000000000000
S7L:I0000 M t3741 i0000 f33 def r0000 s06 e00000000 p00010000000000020000000000000000000000000000000000000000000000000000000000000000
S7L:I0000 M t3741 i0000 f33 def r0000 s06 e00000000 p00020000000000020800000000000000000000000000000000000000000000000000000000000000
S7L:I0000 M t8744 i0008 f33 def r0000 s00 e00000000 p0101000000000000
S7L:I0000 M t07a2 i7780 f14 def r0000 s06 e000000cd
S7L:I0000 TCAP Software event : TCPSWE_BAD_MSG
S7L:I0000 M t3780 i0000 f14 def r0000 s05 e00000000 p000015339e9e00000020000000400040000080000410080200ff0000000000000000000000000000
S7L:I0000 M t1795 i0000 f14 def r0000 s00 e00000000 p0000000f0000000f0000007f

The *.db files must be in the current directory where you execute this program.

References

• Intel/Dialogic SS7 Stack Forums