scufpong/src/game/MultiPlayer.c

#include <stdio.h>
#include <sys/socket.h>
#include <netdb.h>
#include <errno.h>
#include <string.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <unistd.h>

#include "scufeng/log.h"

#include "MultiPlayer.h"

MultiPlayer MultiPlayer_alloc(
    const char *server_host,
    const uint16_t server_port
) {
    MultiPlayer mp;

    struct protoent *proto = getprotobyname("tcp");
    mp.sock = socket(AF_INET, SOCK_STREAM, proto->p_proto);
    if (mp.sock == -1) {
        LOG_FATALF("socket failed: %d %s", errno, strerror(errno));
    }

    struct in_addr server_addr;
    int res = inet_aton(server_host, &server_addr);
    if (res == 0) {
        LOG_FATAL("inet_aton failed");
    }

    struct sockaddr_in server_sockaddr = {
        .sin_family = AF_INET,
        .sin_addr = server_addr,
        .sin_port = htons(server_port)
    };

    res = connect(
        mp.sock,
        (struct sockaddr *) &server_sockaddr,
        sizeof(server_sockaddr)
    );
    if (res == -1) {
        LOG_FATALF("connect failed: %d %s", errno, strerror(errno));
    }

    mp.conn_s = fdopen(mp.sock, "r+");
    if (mp.conn_s == nullptr) {
        LOG_FATALF("fdopen failed: (%d) %s", errno, strerror(errno));
    }

    return mp;
}

void MultiPlayer_free(MultiPlayer *const mp) {
    fclose(mp->conn_s);
    mp->conn_s = nullptr;
    close(mp->conn);
    mp->conn = 0;
    close(mp->sock);
    mp->sock = 0;
}

void MultiPlayer_tick(MultiPlayer *const mp) {
    char buf[1024] = { 0 };
    const size_t buf_size = sizeof(buf) / sizeof(buf[0]);
    printf("Write msg: ");
    fgets(buf, buf_size, stdin);

    const size_t msg_len = strlen(buf) - 1;

    size_t items_written = fwrite(&msg_len, sizeof(msg_len), 1, mp->conn_s);
    if (items_written < 1) {
        LOG_FATALF("fwrite failed to write msg_len %zu", items_written);
    }
    if (fflush(mp->conn_s) == EOF) {
        LOG_FATAL("fflush failed at msg_len");
    }
    printf("Sent %zu items\n", items_written);

    items_written = fwrite(buf, msg_len, 1, mp->conn_s);
    if (items_written < 1) {
        LOG_FATALF("fwrite failed to write msg %zu", items_written);
    }
    if (fflush(mp->conn_s) == EOF) {
        LOG_FATAL("fflush failed at msg");
    }
    printf("Sent %zu items\n", items_written);

    // ssize_t res = send(mp->sock, buf, strlen(buf) - 1, 0);
    // if (res == -1) {
    //     LOG_ERRORF("send failed: %d %s", errno, strerror(errno));
    //     return;
    // }
    // printf("Sent %zu bytes\n", res);
}