import struct
class ICMP6:
    _ICMP_ECHO_REQUEST       = 128
    def __init__(self, destination, id, sequence, payload=None,
            payload_size=56, ttl=64, traffic_class=0):

        if payload is not None:
            payload_size = len(payload)
        else:
            payload = b'\x00'*payload_size

        self._destination = destination
        self._id = id & 0xffff
        self._sequence = sequence & 0xffff
        self._payload = payload
        self._payload_size = payload_size
        self._ttl = ttl
        self._traffic_class = traffic_class
        self._time = 0
    def _checksum(self, data):
        '''
        Compute the checksum of an ICMP packet. Checksums are used to
        verify the integrity of packets.
        '''
        sum = 0
        data += b'\x00'

        for i in range(0, len(data) - 1, 2):
            sum += (data[i] << 8) + data[i + 1]
            sum  = (sum & 0xffff) + (sum >> 16)

        sum = ~sum & 0xffff

        return sum
    def _create_packet(self):
        '''
        Build an ICMP packet from an identifier, a sequence number and
        a payload.
        This method returns the newly created ICMP header concatenated
        to the payload passed in parameters.
        '''
        id, sequence, payload = self._id, self._sequence, self._payload
        checksum = 0

        # Temporary ICMP header to compute the checksum
        header = struct.pack('!2B3H', self._ICMP_ECHO_REQUEST, 0, checksum,
            id, sequence)

        checksum = self._checksum(header + payload)

        # Definitive ICMP header
        header = struct.pack('!2B3H', self._ICMP_ECHO_REQUEST, 0, checksum,
            id, sequence)

        return header + payload





X=512
Y=512
import socket, traceback, time
import pathlib
import json

if pathlib.Path('1.png').exists():
    from PIL import Image
    img = Image.open('1.png')
    img = img.resize((X, Y), Image.Resampling.LANCZOS)
    img.save('out.png')
    img = img.convert('RGBA')
    imgd = []
    for x in range(X):
        imgd.append([])
        for y in range(Y):
            r, g, b, a = img.getpixel((x, y))
            imgd[-1].append((r, g, b, a))
#    with open('1.json', 'w') as f:
#        json.dump(imgd, f)
#    input('pil')
else:
    print('use 1.json')
    with open('1.json', 'r') as f:
        imgd = json.load(f)

def send_icmp(addr):
    try:
        with socket.socket(socket.AF_INET6, socket.SOCK_DGRAM, socket.IPPROTO_ICMPV6) as s:
            p = ICMP6(None, 0xad, 0, b'')._create_packet()
            s.sendto(p, (addr, 0))
    except Exception:
       traceback.print_exc()

import sys
skip = int(sys.argv[1]) if sys.argv[1:] else 0
slp = float(sys.argv[2]) if sys.argv[2:] else 0.0001
for x in range(X):
    if x < skip:
        continue
    print(f"{x=}")
    for y in range(Y):
        r, g, b, a = imgd[x][y]
        if a:
            send_icmp(f"fdcf:8538:9ad5:3333:{x:x}:{y:x}:11{r:02x}:{g:02x}{b:02x}")
            #print(f"fdcf:8538:9ad5:3333:{x:x}:{y:x}:11{r:02x}:{g:02x}{b:02x}")
            time.sleep(slp)