Raspberry Pi Zero セットアップ – 初回起動とログイン

% ping -c 3 raspberrypi.local

% ping -4 raspberrypi.local

import struct
import socket

MDNS_PORT = 5353
MDNS_IP = '244.0.0.251'
SRC_PORT = 12345
LOCCAL_IP = '192.168.x.x'  # 環境に合わせて設定


def send_mdns(server_name):
    udp_socket = socket.socket(
        family=socket.AF_INET, type=socket.SOCK_DGRAM)
    udp_socket.bind(('0.0.0.0', SRC_PORT))
    udp_data = bytearray()
    udp_data += struct.pack('>HHHHHH', 0, 0, 1, 0, 0, 0)
    udp_data += struct.pack(f'B{len(server_name)}s',
                            len(server_name), server_name.encode())
    udp_data += struct.pack(f'B{len("local")}s',
                            len('local'), b'local')
    udp_data += struct.pack('>BHH', 0, 1, 1)
    udp_socket.sendto(udp_data, ('224.0.0.251', 5353))


def recv_mdns(server_name):
    udp_socket = socket.socket(
        family=socket.AF_INET, type=socket.SOCK_DGRAM)
    udp_socket.bind((LOCCAL_IP, SRC_PORT))
    data, addr = udp_socket.recvfrom(1024)
    ip = struct.unpack('4B', data[-4:])
    print(
        f'{server_name}.local: {ip[0]}.{ip[1]}.{ip[2]}.{ip[3]}')


def main():
    print(arg)
    send_mdns('raspberrypi')
    recv_mdns('raspberrypi')


if __name__ == "__main__":
    main()

% ssh pi@raspberrypi.local
pi@raspberrypi.local's password: raspberry
Linux raspberrypi 4.19.97+ #1294 Thu Jan 30 13:10:54 GMT 2020 armv6l

The programs included with the Debian GNU/Linux system are free software;
the exact distribution terms for each program are described in the
individual files in /usr/share/doc/*/copyright.

Debian GNU/Linux comes with ABSOLUTELY NO WARRANTY, to the extent
permitted by applicable law.

SSH is enabled and the default password for the 'pi' user has not been changed.
This is a security risk - please login as the 'pi' user and type 'passwd' to set a new password.

pi@raspberrypi:~ $