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tools/hexnet: initial implementation of TCP receive only server

BodgeMaster-unfinished
BodgeMaster 2022-07-20 08:06:04 +02:00
parent 21310fecc7
commit b1733bc007
1 changed files with 55 additions and 10 deletions
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63
src/tools/hexnet.cpp
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@ -14,9 +14,11 @@
//If not, see https://www.gnu.org/licenses/agpl-3.0.en.html //If not, see https://www.gnu.org/licenses/agpl-3.0.en.html
#include <iostream> #include <iostream>
#include <iomanip>
#include <string> #include <string>
#include <cstdint> #include <cstdint>
#include <cctype> #include <cctype>
#include <sockpp/tcp_acceptor.h>
#include "../lib/error.h++" #include "../lib/error.h++"
#include "../lib/cli.h++" #include "../lib/cli.h++"
@ -34,8 +36,9 @@ int main(int argc, char* argv[]){
bool tcp = true; bool tcp = true;
bool udp = true; bool udp = true;
bool listen = false; bool listen = false;
int64_t mtu = 1500;
std::string host; std::string host;
uint16_t port; in_port_t port;
std::vector<CLI::Flag> flags; std::vector<CLI::Flag> flags;
flags.push_back(CLI::Flag('4', "ipv4", "use IPv4, defaults to both when -4 and -6 are omitted, otherwise uses what is specified")); flags.push_back(CLI::Flag('4', "ipv4", "use IPv4, defaults to both when -4 and -6 are omitted, otherwise uses what is specified"));
@ -45,6 +48,7 @@ int main(int argc, char* argv[]){
std::vector<CLI::UnpositionalArgument> unpositionalArguments; std::vector<CLI::UnpositionalArgument> unpositionalArguments;
unpositionalArguments.push_back(CLI::UnpositionalArgument('c', "connect", "HOST", "connect to HOST, listen for incoming connections if omitted")); unpositionalArguments.push_back(CLI::UnpositionalArgument('c', "connect", "HOST", "connect to HOST, listen for incoming connections if omitted"));
unpositionalArguments.push_back(CLI::UnpositionalArgument('m', "mtu-optimize", "MTU", "Optimize for a specific maximum transfer unit by reading MTU bytes at a time."));
std::vector<CLI::PositionalArgument> positionalArguments; std::vector<CLI::PositionalArgument> positionalArguments;
positionalArguments.push_back(CLI::PositionalArgument("PORT", "the port to use")); positionalArguments.push_back(CLI::PositionalArgument("PORT", "the port to use"));
@ -66,15 +70,56 @@ int main(int argc, char* argv[]){
if (cliParser.getUnpositionalArgument('c').errorCode == ErrorCodes::NOT_PRESENT) { if (cliParser.getUnpositionalArgument('c').errorCode == ErrorCodes::NOT_PRESENT) {
listen = true; listen = true;
} }
if (cliParser.getUnpositionalArgument('m').errorCode == ErrorCodes::SUCCESS) {
mtu = std::stol(cliParser.getUnpositionalArgument('m').value);
}
host = cliParser.getUnpositionalArgument('c').value; host = cliParser.getUnpositionalArgument('c').value;
//FIXME: use a function that returns a fixed-width data type instead //FIXME: use a function that returns a fixed-width data type instead,
port = (uint16_t) std::stoi(cliParser.getPositionalArgument(0).value); // ensure that the given value is a valid port
port = (in_port_t) std::stoi(cliParser.getPositionalArgument(0).value);
std::cerr << "Port: " << (int) port << std::endl; if (listen) {
std::cerr << (listen? "Listening" : "Host: ") << host << std::endl; if (ipv6) {
std::cerr << "IPv4: " << (ipv4? "yes" : "no") << std::endl; std::cerr << "IPv6 support is not implented yet." << std::endl;
std::cerr << "IPv6: " << (ipv6? "yes" : "no") << std::endl;
std::cerr << "TCP: " << ( tcp? "yes" : "no") << std::endl;
std::cerr << "UDP: " << ( udp? "yes" : "no") << std::endl;
return EXIT_UNIMPLEMENTED; return EXIT_UNIMPLEMENTED;
} }
if (udp) {
std::cerr << "UDP support is not implemented yet." << std::endl;
return EXIT_UNIMPLEMENTED;
}
std::cerr << "Listening on port " << port << "." << std::endl;
sockpp::socket_initializer socketInitializer;
sockpp::tcp_acceptor tcpAcceptor(port);
if (!tcpAcceptor) {
std::cerr << "Error while creating TCP acceptor: " << tcpAcceptor.last_error_str() << std::endl;
return EXIT_RUNTIME;
}
sockpp::inet_address peer;
sockpp::tcp_socket tcpSocket = tcpAcceptor.accept(&peer);
std::cerr << "Incoming connection from " << peer << std::endl;
if (!tcpSocket) {
std::cerr << "Error on incoming connection: " << tcpAcceptor.last_error_str() << std::endl;
return EXIT_RUNTIME;
}
ssize_t numBytes;
uint8_t buffer[mtu];
while ((numBytes = tcpSocket.read(buffer, sizeof(buffer))) > 0) {
for (ssize_t i=0; i<numBytes; i++) {
std::cout << std::hex << std::setfill('0') << std::setw(2) << (short) buffer[i];
}
std::cout.flush();
}
std::cerr << std::endl << "Connection closed." << std::endl;
return EXIT_SUCCESS;
} else {
std::cerr << "Client mode is not implemented yet." << std::endl;
return EXIT_UNIMPLEMENTED;
}
}