123 lines
3.7 KiB
C
123 lines
3.7 KiB
C
//
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// Created by k0rb4k on 30/03/2021.
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//
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#include "server.h"
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#include "config.h"
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//TODO: object-like C
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extern int errno;
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_Noreturn void udpListen(int serverSocket, struct sockaddr * clientAddress, unsigned long addressLength) {
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int recvLen;
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char clientMessage[MESSAGE_STRING_LENGTH], quote[MESSAGE_STRING_LENGTH];
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for (;;) {
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// receive data
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recvLen = recvfrom(serverSocket, clientMessage, MESSAGE_STRING_LENGTH, 0, clientAddress, (socklen_t *) &addressLength);
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perror("recvfrom");
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if (recvLen >= 0) {
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printf("client says: %s\n", clientMessage);
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// send data
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getRandomQuote(quote);
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printf("responding: `%s`\n", quote);
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sendto(serverSocket, quote, strlen(quote), 0, clientAddress, addressLength);
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perror("sendto");
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}
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}
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}
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void tcpListen(int serverSocket, struct sockaddr * clientAddress, unsigned long addressLength) {
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int clientSocket;
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char quote[MESSAGE_STRING_LENGTH] = "", clientMessage[MESSAGE_STRING_LENGTH] = "";
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listen(serverSocket, 5);
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puts("server listening");
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// accept connections
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//TODO: t h r e a d s
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while ((clientSocket = accept(serverSocket, clientAddress, (socklen_t *) &addressLength)) >=
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0) {
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puts("client connected");
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// receive data
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while (recv(clientSocket, clientMessage, MESSAGE_STRING_LENGTH, 0) >= 0) {
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printf("client says: %s\n", clientMessage);
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// send data
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getRandomQuote(quote);
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printf("responding: \"%s\"\n", quote);
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send(clientSocket, quote, strlen(quote), 0);
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}
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puts("client disconnected");
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}
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if (clientSocket < 0) {
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puts("client connection failed");
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exit(3);
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}
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}
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void server(int tcp, int ipv6) {
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int serverSocket, socketType, socketProtocol;
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unsigned long serverAddressLength, clientAddressLength;
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struct sockaddr *serverAddress, *clientAddress;
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struct sockaddr_in serverAddress4, clientAddress4;
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struct sockaddr_in6 serverAddress6, clientAddress6;
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if (ipv6) {
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serverAddress6.sin6_family = AF_INET6;
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serverAddress6.sin6_addr = in6addr_any;
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serverAddress6.sin6_port = htons(DEFAULT_LISTEN_PORT);
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serverAddress = (struct sockaddr *) &serverAddress6;
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serverAddressLength = sizeof serverAddress6;
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clientAddress6.sin6_family = AF_INET6;
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clientAddress = (struct sockaddr *) &clientAddress6;
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clientAddressLength = sizeof clientAddress6;
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} else {
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serverAddress4.sin_family = AF_INET;
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serverAddress4.sin_addr.s_addr = INADDR_ANY;
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serverAddress4.sin_port = htons(DEFAULT_LISTEN_PORT);
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serverAddress = (struct sockaddr *) &serverAddress4;
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serverAddressLength = sizeof serverAddress4;
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clientAddress4.sin_family = AF_INET;
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clientAddress = (struct sockaddr *) &clientAddress4;
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clientAddressLength = sizeof clientAddress4;
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}
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if (tcp) {
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socketType = SOCK_STREAM;
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socketProtocol = IPPROTO_TCP;
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} else {
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socketType = SOCK_DGRAM;
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socketProtocol = IPPROTO_UDP;
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}
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// create sock
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serverSocket = socket(serverAddress->sa_family, socketType, socketProtocol);
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if (serverSocket == -1) {
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puts("socket not created");
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exit(1);
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}
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puts("socket created");
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// bind sock
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if (bind(serverSocket, serverAddress, serverAddressLength) < 0) {
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puts("bind failed");
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exit(2);
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}
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// TODO: threads to run both at the same time
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if (tcp) {
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tcpListen(serverSocket, clientAddress, clientAddressLength);
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} else {
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udpListen(serverSocket, clientAddress, clientAddressLength);
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}
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}
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