1 /**

     2  * Relational pipes

     3  * Copyright © 2022 František Kučera (Frantovo.cz, GlobalCode.info)

     4  *

     5  * This program is free software: you can redistribute it and/or modify

     6  * it under the terms of the GNU General Public License as published by

     7  * the Free Software Foundation, version 3 of the License.

     8  *

     9  * This program is distributed in the hope that it will be useful,

    10  * but WITHOUT ANY WARRANTY; without even the implied warranty of

    11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

    12  * GNU General Public License for more details.

    13  *

    14  * You should have received a copy of the GNU General Public License

    15  * along with this program. If not, see <http://www.gnu.org/licenses/>.

    16  */

    17 #include <string>

    18 #include <cstring>

    19 #include <unistd.h>

    20 #include <stdexcept>

    21 #include <arpa/inet.h>

    22 #include <sys/types.h>

    23 #include <sys/socket.h>

    24 #include <netinet/in.h>

    25 #include <vector>

    26 

    27 #include "Socket.h"

    28 

    29 namespace relpipe {

    30 namespace out {

    31 namespace socket {

    32 

    33 class TCPSocket : public Socket {

    34 public:

    35 

    36 	void send(const std::string& message) override {

    37 		// TODO: TCP send()

    38 		struct sockaddr_in a;

    39 		memset((char *) &a, 0, sizeof (a));

    40 		a.sin_family = AF_INET;

    41 		a.sin_addr.s_addr = inet_addr("127.0.0.1"); // TODO: use getaddrinfo() instead (because of error -1 = 255.255.255.255)

    42 		a.sin_port = htons(1234);

    43 

    44 		int s = ::socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);

    45 		sendto(s, message.c_str(), message.size(), 0, (sockaddr*) & a, sizeof (a));

    46 

    47 		close(s);

    48 	}

    49 

    50 	const std::string receive() override {

    51 		// TODO: TCP receive()

    52 		return "TODO: receive() a message";

    53 	}

    54 

    55 };

    56 

    57 static class TCPSocketFactory : public SocketFactory {

    58 public:

    59 

    60 	bool canHandle(const std::string& connectionString) override {

    61 		return connectionString.rfind("tcp://", 0) == 0;

    62 	}

    63 

    64 	Socket* open(const std::string& connectionString) override {

    65 		// TODO: pass string to constructor

    66 		return new TCPSocket();

    67 	}

    68 } tcpSocketFactory;

    69 

    70 static std::vector<SocketFactory*> factories{&tcpSocketFactory};

    71 

    72 SocketFactory* SocketFactory::find(const std::string& connectionString) {

    73 	for (auto f : factories) if (f->canHandle(connectionString)) return f;

    74 	return nullptr;

    75 }

    76 

    77 

    78 }

    79 }

    80 }