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How to use get_external_port method in localstack

Best Python code snippet using localstack_python

peers.py

Source:peers.py

1import asyncio2import structlog3from .messages import (4    create_peers_message,5    create_block_message,6    create_transaction_message,7    create_ping_message8)9from .transactions import validate_transaction10logger = structlog.getLogger()11class P2PError(Exception):12    pass13class P2PProtocol:14    def __init__(self, server):15        self.server = server16        self.blockchain = server.blockchain17        self.connection_pool = server.connection_pool18    @staticmethod19    async def send_message(writer, message):20        writer.write(message.encode() + b"\n")21    async def handle_message(self, message, writer):22        message_handlers = {23            "block": self.handle_block,24            "ping": self.handle_ping,25            "peers": self.handle_peers,26            "transaciton": self.handle_transaction,27        }28        handler = message_handlers.get(message["name"])29        if not handler:30            return P2PError("Missing handler for message")31        await handler(message, writer)32    async def handle_ping(self, message, writer):33        block_height = message["payload"]["block_height"]34        writer.is_miner = message["payload"]["is_miner"]35        peers = self.connection_pool.get_alive_peers(20)36        peers_message = create_peers_message(37            self.server.get_external_ip,38            self.server.get_external_port,39            peers)40        await self.send_message(writer, peers_message)41        if block_height < self.blockchain.last_block["height"]:42            for block in self.blockchain.chain[block_height + 1:]:43                await self.send_message(44                    writer,45                    create_block_message(46                        self.server.get_external_ip,47                        self.server.get_external_port,48                        block49                    ),50                )51    async def handle_transaction(self, message, writer):52        logger.info("Received transaction")53        tx = message["payload"]54        if validate_transaction(tx) is True:55            self.blockchain.pending_transactions.append(tx)56            for peer in self.connection_pool.get_alive_peers(20):57                await self.send_message(58                    peer,59                    create_transaction_message(self.server.get_external_ip, self.server.get_external_port, tx),60                )61        else:62            logger.warning("Received invalid transaction")63    async def handle_block(self, message, writer):64        logger.info("Received new block")65        block = message["payload"]66        self.blockchain.add_block(block)67        for peer in self.connection_pool.get_alive_peers(20):68            await self.send_message(69                peer,70                create_block_message(self.server.get_external_ip, self.server.get_external_port, block),71            )72    async def handle_peers(self, message, writer):73        logger.info("Received new peers")74        peers = message["payload"]75        ping_message = create_ping_message(76            self.server.external_ip,77            self.server.external_port,78            len(self.blockchain.chain),79            len(self.connection_pool.get_alive_peers(50)),80            False,81        )82        for peer in peers:83            reader, writer = await asyncio.open_connection(peer["ip"], peer["port"])84            self.connection_pool.add_peer(writer)...

custom_packet1.py

Source:custom_packet1.py

...18        self._ip_src = packet[0][1].src19        self._ip_dst = packet[0][1].dst20        self._port_src = packet[0][2].sport21        self._port_dst = packet[0][2].dport22        self._app_proto = self.get_app_proto(self.get_external_port())23        self._trans_proto = self.get_trans_proto(packet)24        self._size = self.get_size(packet)25        self._process = Process(self._ip_src,self._port_src,self._port_dst)26        27    28    def is_incoming(self):29        """ Define if the packet is incoming or outgoing from the interface."""30        if self._ip_src != get_if_addr(conf.iface):31            return True32        return False3334    def get_trans_proto(self,packet):35        """ Define what transportation protocol the packet is using."""36        if packet.haslayer(TCP):37            return "TCP"38        if packet.haslayer(UDP):39            return "UDP"40        if packet.haslayer(ICMP):41            return "ICMP"4243    def get_app_proto(self,port):44        """ Define what application protocol the packet is using.45            It uses the getservbyport from socket module to do this task.46        """47        try:48            return socket.getservbyport(port)49        except:50            return "others"5152    def get_external_port(self):53        """ Define the external port.54            This info is passed to the get_app_proto method in the __init__ method.55        """56        if self._ip_src != get_if_addr(conf.iface):57            return self._port_src 58        else: 59            return self._port_dst6061    def get_external_ip(self):62        """ Define the external IP.63            This info is used in the output_format method.64        """65        if self._ip_src != get_if_addr(conf.iface):66            return self._ip_src
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