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12 changed files with 73 additions and 757 deletions

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Cargo.lock generated
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source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "180e6ccf01daf4c426b846dfc66db1fc518f074baa793aa7d9b9aaeffad6a3b6"
[[package]]
name = "windows_i686_gnu"
version = "0.42.2"
@ -980,12 +504,6 @@ version = "0.48.5"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "a75915e7def60c94dcef72200b9a8e58e5091744960da64ec734a6c6e9b3743e"
[[package]]
name = "windows_i686_msvc"
version = "0.36.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "e2e7917148b2812d1eeafaeb22a97e4813dfa60a3f8f78ebe204bcc88f12f024"
[[package]]
name = "windows_i686_msvc"
version = "0.42.2"
@ -998,12 +516,6 @@ version = "0.48.5"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "8f55c233f70c4b27f66c523580f78f1004e8b5a8b659e05a4eb49d4166cca406"
[[package]]
name = "windows_x86_64_gnu"
version = "0.36.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "4dcd171b8776c41b97521e5da127a2d86ad280114807d0b2ab1e462bc764d9e1"
[[package]]
name = "windows_x86_64_gnu"
version = "0.42.2"
@ -1028,12 +540,6 @@ version = "0.48.5"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "0b7b52767868a23d5bab768e390dc5f5c55825b6d30b86c844ff2dc7414044cc"
[[package]]
name = "windows_x86_64_msvc"
version = "0.36.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "c811ca4a8c853ef420abd8592ba53ddbbac90410fab6903b3e79972a631f7680"
[[package]]
name = "windows_x86_64_msvc"
version = "0.42.2"
@ -1045,23 +551,3 @@ name = "windows_x86_64_msvc"
version = "0.48.5"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "ed94fce61571a4006852b7389a063ab983c02eb1bb37b47f8272ce92d06d9538"
[[package]]
name = "zerocopy"
version = "0.7.32"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "74d4d3961e53fa4c9a25a8637fc2bfaf2595b3d3ae34875568a5cf64787716be"
dependencies = [
"zerocopy-derive",
]
[[package]]
name = "zerocopy-derive"
version = "0.7.32"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "9ce1b18ccd8e73a9321186f97e46f9f04b778851177567b1975109d26a08d2a6"
dependencies = [
"proc-macro2",
"quote",
"syn",
]

View File

@ -11,9 +11,7 @@ crate-type = ["rlib", "cdylib"]
[dependencies]
anyhow = "1.0.77"
egui = "0.26.2"
indicatif = "0.17.7"
pcap = { version = "1.2.0", features = ["capture-stream"] }
pcap-parser = { version = "0.14.1", features = ["data"] }
png = "0.17.10"
pyo3 = { version = "0.20.0", "features" = ["extension-module"] }

View File

@ -1,31 +1,8 @@
### Thermal decoder
https://telavivmakers.org/tamiwiki/projects/thermalcam
https://wiki.telavivmakers.org/tamiwiki/projects/thermalcam
### Starting the stream
#### Enable jumbo frames
```
sudo ip link set eth0 mtu 9000
```
#### Send start packet
You need to send a special packet.
Sending it via sudo because of raw sockets:
```bash
sudo ./venv/bin/python ./replay.py
```
To send it you need the capability to open sockets in raw mode, but that does not work well with scripts (see [1]
[1] setcap for executables, not helpful for python scripts:
```
setcap cap_net_raw,cap_net_admin=eip ./replay.py
```
### Rust lib usage
# if you don't already have a virtualenv. Linux specific, adjust to your OS.

181
decode.py Normal file → Executable file
View File

@ -1,12 +1,9 @@
#!/usr/bin/env python3
import argparse
from pathlib import Path
import os
import subprocess
from io import BytesIO
import numpy as np
from tqdm import tqdm
from datetime import datetime
import pandas as pd
import pcapng
from struct import unpack
@ -15,7 +12,6 @@ from PIL import Image
# Create the parser
parser = argparse.ArgumentParser(description="Process a pcap file.")
parser.add_argument("--live", action="store_true", help="Process images live")
# Add an argument for the pcap file, with a default value
parser.add_argument('input_file', nargs='?', default='in.pcap', help='The pcap file to process')
@ -23,41 +19,39 @@ parser.add_argument('input_file', nargs='?', default='in.pcap', help='The pcap f
# Parse the arguments
args = parser.parse_args()
# Now use args.input_file as the file to process
input_file = args.input_file
basename = os.path.splitext(os.path.basename(input_file))[0]
# Read packets from a pcap file
scanner = pcapng.scanner.FileScanner(open(input_file, "rb"))
blocks = tqdm(scanner)
# Helper function to safely get an attribute from an object
def tryget(obj, att):
if hasattr(obj, att):
return getattr(obj, att)
return None
# TODO - probably a better way to do this
def live_capture_cb(cb):
def outer(pkt):
data = bytes(pkt)
l = len(data)
if l == 6972:
cb(data)
scapy.all.sniff(iface="enp1s0f0", filter='udp', prn=outer)
def rightsize(it):
for i, obj in enumerate(it):
if isinstance(obj, bytes):
l = len(obj)
data = obj
else:
if not hasattr(obj, 'packet_len'):
continue
l = obj.packet_len
data = obj.packet_data
if l != 6972:
len = obj.packet_len
if len != 6972:
continue
yield data
yield obj.packet_data
def removestart(it):
"Remove the UDP header from the packets"
for x in it:
yield removestart_inner(x)
yield x[0x2A:]
def removestart_inner(x):
return x[0x2A:]
# Function to parse packet data
def parse(data):
@ -76,85 +70,42 @@ def parsed(it):
yield parse(x)
class FrameCollector:
def __init__(self):
self.current = []
def handle(self, obj):
ret = None
if obj['part'] == 0:
if len(self.current) > 0:
ret = b"".join(self.current)
self.current = []
#otherdata = []
self.current.append(obj["data"])
return ret
#otherdata.append(obj)
def last(self):
if len(self.current) > 0:
return b"".join(current)
return None
# Function to group data into frames
def frames(it):
handler = FrameCollector()
#otherdata = []
current = []
for obj in it:
ret = handler.handle(obj)
if ret:
yield ret
last = handler.last()
if last:
yield last
if obj['part'] == 0:
if len(current) > 0:
yield b"".join(current)
current = []
current.append(obj["data"])
if len(current) > 0:
yield b"".join(current)
WIDTH = 384
HEIGHT = 288
def bad_frame(frame, width=WIDTH, height=HEIGHT):
return len(frame) != width * height * 2 # 16 bpp
def skip_bad_frames(it, width=WIDTH, height=HEIGHT):
def iterimages(it, width, height, pixelformat=">H"):
for frame in it:
if bad_frame(frame): # 16 bpp
# Will be fixed when we stopped doing restarts
#print(f'{len(frame)} != {width} * {height} * 2')
if len(frame) != width * height * 2: # 16 bpp
continue
yield frame
def iterimages(it, width=WIDTH, height=HEIGHT, pixelformat=">H"):
for frame in it:
yield Image.fromarray(np.frombuffer(frame, dtype=pixelformat).reshape(width, height))
def process_video():
# Now use args.input_file as the file to process
input_file = args.input_file
basename = os.path.splitext(os.path.basename(input_file))[0]
stream = open(input_file, 'rb')
# Read packets from a pcap file
scanner = pcapng.scanner.FileScanner(stream)
blocks = tqdm(scanner)
# Get frames and convert them to images
frames = frames(parsed(removestart(rightsize(blocks))))
images = iterimages(it=frames, width=384, height=288)
# Get frames and convert them to images
frames = skip_bad_frames(frames(parsed(removestart(rightsize(blocks)))))
# Create the directory for frames if not exists
frame_dir = f"frames/{basename}"
if not os.path.exists(frame_dir):
# Create the directory for frames if not exists
frame_dir = f"frames/{basename}"
if not os.path.exists(frame_dir):
os.makedirs(frame_dir)
# Save each image as a PNG file
images = iterimages(it=frames)
for i, img in enumerate(images):
# Save each image as a PNG file
for i, img in enumerate(images):
img.save(f'frames/{basename}/{basename}_{i:04}.png')
ffmpeg_input = f"frames/{basename}/{basename}_%04d.png"
command = [
# Produce a video from the saved images
ffmpeg_input = f"frames/{basename}/{basename}_%04d.png"
command = [
"ffmpeg",
"-y", # Overwrite output file without asking
"-hide_banner", # Hide banner
@ -164,55 +115,11 @@ def process_video():
"-i", ffmpeg_input, # Input file pattern
"-vf", "transpose=1", # Video filter for transposing
"-s", "384x288", # Size of one frame
"-vcodec", "libopenh264", # Video codec
"-vcodec", "libx264", # Video codec
"-pix_fmt", "yuv420p", # Pixel format: YUV 4:2:0
"thermal.mp4", # Output file in MP4 container
]
]
subprocess.run(command)
print("to play: ffplay thermal.mp4")
if args.live:
# TODO: to video via ffmpeg; right now just a single png
# of the last frame
def todo_live_ffmpeg():
output = 'to_ffmpeg'
# live: write to named pipe
if not Path(output).exists():
print(f'making fifo at {output}')
os.mkfifo(output)
fd = open(output, 'wb')
for frame in frames:
fd.write(frame)
print('live stream, import scapy')
import scapy.all
print('open stream')
class PacketHandler:
def __init__(self, cb):
self.frame_collector = FrameCollector()
self.cb = cb
def handle(self, pkt):
pkt = removestart_inner(pkt)
parsed = parse(pkt)
frame_maybe = self.frame_collector.handle(parsed)
if not frame_maybe or bad_frame(frame_maybe):
return
self.cb(frame_maybe)
progress = tqdm()
def on_frame(frame):
progress.update(1)
Image.fromarray(np.frombuffer(frame, dtype='>H').reshape(WIDTH, HEIGHT)).save(f'live.new.png')
os.rename('live.new.png', 'live.png')
handler = PacketHandler(on_frame)
live_capture_cb(handler.handle)
else:
process_video()
subprocess.run(command)
print("to play: ffplay thermal.mp4")

View File

@ -1,17 +0,0 @@
use std::net::UdpSocket;
fn main() -> std::io::Result<()> {
{
let socket = UdpSocket::bind("192.168.0.1:8091")?;
// Receives a single datagram message on the socket. If `buf` is too small to hold
// the message, it will be cut off.
let buf = [
1, 0x20, 1, 0x80, 0x1b, 0x40, 0, 0x20, 0, 0, 0, 0, 0, 0, 0, 0x0f, 0, 0, 0, 1, 0, 0, 1,
0, 0, 0x20, 0x2b, 0,
];
socket.set_broadcast(true)?;
socket.send_to(&buf, "192.168.0.255:8092")?;
}
Ok(())
}

View File

@ -1,9 +0,0 @@
from socket import socket, AF_INET, SOCK_DGRAM
s = socket(AF_INET, SOCK_DGRAM)
s.bind(('', 8090))
while True:
d = s.recvfrom(1024)
print(d)

1
replay.py Executable file → Normal file
View File

@ -1,4 +1,3 @@
#!/usr/bin/env python3
#replay the "trigger" packet.
#this packets will start the source broadcasting its packets.

View File

@ -1,2 +0,0 @@
#!/bin/bash
sudo dnsmasq -i enp1s0f0 --local-service --dhcp-range=192.168.0.10,192.168.0.100 --dhcp-leasefile=dhcp.lease -d

View File

@ -1,3 +0,0 @@
#!/bin/bash
cd $(dirname $0)
sudo ./venv/bin/python ./decode.py --live

View File

@ -89,7 +89,7 @@ impl PacketsIterator {
pub struct Header {
c1: u32,
c2: u16,
pub part: u16,
part: u16,
a: u16,
ffaa: u16,
b: u16,
@ -98,7 +98,7 @@ pub struct Header {
}
impl Header {
pub fn read(data: &[u8]) -> anyhow::Result<Self> {
fn read(data: &[u8]) -> anyhow::Result<Self> {
Ok(Header {
c1: u32::from_be_bytes([data[0], data[1], data[2], data[3]]),
c2: u16::from_be_bytes([data[4], data[5]]),
@ -122,12 +122,12 @@ impl Header {
}
}
pub const HDR_SIZE: usize = std::mem::size_of::<Header>();
const HDR_SIZE: usize = std::mem::size_of::<Header>();
pub struct Frame {
#[allow(dead_code)]
pub header: Header,
pub raw: Vec<u8>,
header: Header,
raw: Vec<u8>,
}
impl Frame {
@ -184,7 +184,7 @@ impl Iterator for Decoder {
}
}
pub fn write_raw_frame(name: &str, data: &[u8]) -> anyhow::Result<()> {
fn write_raw_frame(name: &str, data: &[u8]) -> anyhow::Result<()> {
let path = Path::new(&name);
let file = File::create(path)?;
let ref mut w = BufWriter::new(file);

View File

@ -2,31 +2,11 @@
from pathlib import Path
from thermaldecoder import decode
import numpy as np
import subprocess
import matplotlib.pyplot as plt
# Create a directory to store the frames if it doesn't exist
root = Path('frames')
root.mkdir(exist_ok=True)
# Decode the frames from the pcap file
frames = list(decode('indesk.pcapng'))
# Iterate over the frames
for i, frame in enumerate(frames):
try:
# Convert the frame to an image file
img_path = root / f"frame_{i}.png"
f = np.array(frame)
f.shape = (384, 288)
plt.imshow(f)
plt.axis('off')
plt.savefig(img_path, bbox_inches='tight', pad_inches=0)
plt.close()
# Use ffmpeg to display the image
subprocess.run(['ffmpeg', '-i', str(img_path), '-vf', 'scale=800:600', '-framerate', '25', '-f', 'image2pipe', '-'], check=True)
except ValueError as e:
print(f"Error processing frame {i}: {e}")
frames = list(decode('in.pcap'))
f = np.array(frames[0])
f.shape = (384, 288)
plt.imshow(f)
plt.show()

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