// This is a personal academic project. Dear PVS-Studio, please check it.
// PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
#include "include/sockets.h"

int createSocket() {
    int fd;
    if ((fd = socket(AF_INET, SOCK_STREAM, 0)) < 0)
        printSystemError("Sockets: socket()");
    return fd;
}

void setSockOptions(int fd) {
    int opt = 1;
    if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt)) < 0)
        printSystemError("Sockets: setsockopt()");
}

int bindAndGetSocket(int fd, struct sockaddr_in *address) {
    if (bind(fd, (struct sockaddr *) address, sizeof(*address)) < 0) 
        printSystemError("Sockets: bind()");

    if (listen(fd, MAX_PEND_REQ) < 0)
        printSystemError("Sockets: listen()");

    int addrlen = sizeof(*address), fdAux;
    if ((fdAux = accept(fd, (struct sockaddr *) address, (socklen_t *) &addrlen)) < 0)
        printSystemError("Sockets: accept()");
    
    return fdAux;
}

void connectToSocket(int fd, struct sockaddr_in *address) {
    if (connect(fd, (struct sockaddr *) address, sizeof(*address)) < 0)
        printSystemError("Sockets: connect()");
}

void closeSocket(int fd) {
    if (close(fd) < 0)
        printSystemError("Sockets: close()");
}

void setSockAddress(int argc, char *argv[], struct sockaddr_in * address, in_addr_t inAddress) {
    address->sin_family = AF_INET;
    address->sin_addr.s_addr = htonl(inAddress);
    address->sin_port = htons(PORT);

    int opt;
    opterr = 0;
    while ((opt = getopt(argc, argv, "a:p:")) != -1) {
        if (optarg[0] == '-')
            printError("Usage: server [-a address] [-p port]\n");
        switch (opt) {
            case 'a':
                if (inet_pton(AF_INET, optarg, &address->sin_addr) <= 0)
                    printError("Sockets: inet_pton()");
                break;
            case 'p':
                address->sin_port = htons(atoi(optarg));
                break;
            default:
                printError("Usage: server [-a address] [-p port]\n");
        }
    }
}