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fix creation of queue on dummy

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This commit is contained in:
Hendrik Schutter
2025-12-06 23:04:00 +01:00
parent d6c4b24149
commit 6a747cb127
7 changed files with 344 additions and 51 deletions
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dummy_receiver.py
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@ -1,53 +1,185 @@
import sysv_ipc #pip install sysv-ipc
import pycstruct #pip install pycstruct
#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""Author: Hendrik Schutter, localhorst@mosad.xyz
Date of creation: 2025/12/05
Date of last modification: 2025/12/05
"""
import ctypes
import os
import time
import argparse
# Constants
STR_BUFFER_SIZE = 64
MSG_QUEUE_KEY = 0x1B11193C0
IPC_CREAT = 0o1000
terminate = False
str_buffer_size = 64
msg_queue_key = 0x1B11193C0
class TDriveData(ctypes.Structure):
_fields_ = [
("caDriveIndex", ctypes.c_char * STR_BUFFER_SIZE),
("caDriveHours", ctypes.c_char * STR_BUFFER_SIZE),
("caDriveCycles", ctypes.c_char * STR_BUFFER_SIZE),
("caDriveErrors", ctypes.c_char * STR_BUFFER_SIZE),
("caDriveShredTimestamp", ctypes.c_char * STR_BUFFER_SIZE),
("caDriveShredDuration", ctypes.c_char * STR_BUFFER_SIZE),
("caDriveCapacity", ctypes.c_char * STR_BUFFER_SIZE),
("caDriveState", ctypes.c_char * STR_BUFFER_SIZE),
("caDriveModelFamily", ctypes.c_char * STR_BUFFER_SIZE),
("caDriveModelName", ctypes.c_char * STR_BUFFER_SIZE),
("caDriveSerialnumber", ctypes.c_char * STR_BUFFER_SIZE),
("caDriveReHddVersion", ctypes.c_char * STR_BUFFER_SIZE),
]
try:
mq = sysv_ipc.MessageQueue(msg_queue_key, sysv_ipc.IPC_CREAT)
class TMsgQueueData(ctypes.Structure):
_fields_ = [
("msg_queue_type", ctypes.c_long),
("driveData", TDriveData),
]
# IPC bindings - enable errno support
libc = ctypes.CDLL("libc.so.6", use_errno=True)
msgget = libc.msgget
msgrcv = libc.msgrcv
msgget.argtypes = [ctypes.c_int, ctypes.c_int]
msgget.restype = ctypes.c_int
msgrcv.argtypes = [
ctypes.c_int,
ctypes.POINTER(TMsgQueueData),
ctypes.c_size_t,
ctypes.c_long,
ctypes.c_int,
]
msgrcv.restype = ctypes.c_ssize_t
def create_drive_objects(drive_info):
"""Convert dictionary to layouter-compatible DriveData and ReHddInfo objects"""
drive = layouter.DriveData(
drive_index=int(drive_info["driveIndex"]),
drive_state=drive_info["driveState"],
modelfamily=drive_info["driveModelFamily"],
modelname=drive_info["driveModelName"],
capacity=int(drive_info["driveCapacity"]),
serialnumber=drive_info["driveSerialnumber"],
power_on_hours=int(drive_info["driveHours"]),
power_cycle=int(drive_info["driveCycles"]),
smart_error_count=int(drive_info["driveErrors"]),
shred_timestamp=int(drive_info["driveShredTimestamp"]),
shred_duration=int(drive_info["driveShredDuration"]),
)
rehdd_info = layouter.ReHddInfo(
link="https://git.mosad.xyz/localhorst/reHDD",
version=drive_info["driveReHddVersion"],
)
return drive, rehdd_info
def worker(queue_id, test_mode=False):
try:
while not terminate:
if test_mode:
time.sleep(3)
drive_info = {
"driveIndex": "42",
"driveHours": 44,
"driveCycles": 45,
"driveErrors": 43,
"driveShredTimestamp": int(time.time()),
"driveShredDuration": 0,
"driveCapacity": 42,
"driveState": "shredded",
"driveModelFamily": "modelFamily",
"driveModelName": "modelName",
"driveSerialnumber": "serial",
"driveReHddVersion": "V1.1.2",
}
else:
msg = TMsgQueueData()
print("Waiting for message from queue...")
# Calculate message size - must match C++ side: sizeof(t_msgQueueData) - sizeof(long)
# This is the size of the data portion (excluding msg_queue_type)
msg_size = ctypes.sizeof(TMsgQueueData) - ctypes.sizeof(ctypes.c_long)
print(f"Message size to receive: {msg_size} bytes")
result = msgrcv(
queue_id,
ctypes.byref(msg),
msg_size,
0, # msg type (0 = get first message)
0, # flags (0 = blocking)
)
if result == -1:
err = ctypes.get_errno()
print(
f"Error reading from message queue: {os.strerror(err)} (errno: {err})"
)
break
print(f"Received {result} bytes from queue")
d = msg.driveData
drive_info = {
"driveIndex": d.caDriveIndex.decode().strip("\x00"),
"driveHours": int(d.caDriveHours.decode().strip("\x00")),
"driveCycles": int(d.caDriveCycles.decode().strip("\x00")),
"driveErrors": int(d.caDriveErrors.decode().strip("\x00")),
"driveShredTimestamp": int(
d.caDriveShredTimestamp.decode().strip("\x00")
),
"driveShredDuration": int(
d.caDriveShredDuration.decode().strip("\x00")
),
"driveCapacity": int(d.caDriveCapacity.decode().strip("\x00")),
"driveState": d.caDriveState.decode().strip("\x00"),
"driveModelFamily": d.caDriveModelFamily.decode().strip("\x00"),
"driveModelName": d.caDriveModelName.decode().strip("\x00"),
"driveSerialnumber": d.caDriveSerialnumber.decode().strip("\x00"),
"driveReHddVersion": d.caDriveReHddVersion.decode().strip("\x00"),
}
print(f"Received Drive Data: {drive_info}")
except Exception as e:
import traceback
print(f"Worker encountered an error: {e}")
traceback.print_exc()
def main():
while True:
message, mtype = mq.receive()
print("")
#print("*** New message received ***")
# print(f"Raw message: {message}")
try:
# Create or connect to the message queue with IPC_CREAT flag
# This matches the C++ sender's flags (IPC_CREAT | 0666)
queue_id = msgget(MSG_QUEUE_KEY, IPC_CREAT | 0o666)
if queue_id == -1:
err = ctypes.get_errno()
raise RuntimeError(
f"Failed to create/connect to the message queue: {os.strerror(err)}"
)
#uint8_t u8DriveIndex;
#uint32_t u32DriveHours;
#uint32_t u32DriveCycles;
#uint32_t u32DriveError;
#uint64_t u64DriveShredTimestamp;
#uint64_t u64DriveShredDuration;
#uint64_t u64DriveCapacity;
#char caDriveState[STR_BUFFER_SIZE];
#char caDriveModelFamiliy[STR_BUFFER_SIZE];
#char caDriveModelName[STR_BUFFER_SIZE];
#char caDriveSerialnumber[STR_BUFFER_SIZE];
driveData = pycstruct.StructDef()
driveData.add('utf-8', 'driveIndex', length=str_buffer_size)
driveData.add('utf-8', 'driveHours', length=str_buffer_size)
driveData.add('utf-8', 'driveCycles', length=str_buffer_size)
driveData.add('utf-8', 'driveErrors', length=str_buffer_size)
driveData.add('utf-8', 'driveShredTimestamp', length=str_buffer_size)
driveData.add('utf-8', 'driveShredDuration', length=str_buffer_size)
driveData.add('utf-8', 'driveCapacity', length=str_buffer_size)
driveData.add('utf-8', 'driveState', length=str_buffer_size)
driveData.add('utf-8', 'driveModelFamiliy', length=str_buffer_size)
driveData.add('utf-8', 'driveModelModel', length=str_buffer_size)
driveData.add('utf-8', 'driveSerialnumber', length=str_buffer_size)
driveData.add('utf-8', 'driveReHddVersion', length=str_buffer_size)
# Dictionary representation
result = driveData.deserialize(message)
print('Dictionary object:')
print(str(result))
except sysv_ipc.ExistentialError:
print("ERROR: message queue creation failed")
print(f"Successfully connected to message queue (ID: {queue_id})")
worker(queue_id)
except Exception as e:
import traceback
print(f"Main process encountered an error: {e}")
traceback.print_exc()
time.sleep(30)
if __name__ == "__main__":
main()