mirror of
https://github.com/p2r3/bareiron.git
synced 2025-10-02 07:35:08 +02:00
278 lines
7.3 KiB
C
278 lines
7.3 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <arpa/inet.h>
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#include <unistd.h>
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#include "globals.h"
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#include "varnum.h"
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#include "packets.h"
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#include "tools.h"
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static uint64_t htonll (uint64_t value) {
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#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
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return ((uint64_t)htonl((uint32_t)(value >> 32))) |
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((uint64_t)htonl((uint32_t)(value & 0xFFFFFFFF)) << 32);
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#else
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return value;
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#endif
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}
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ssize_t writeByte (int client_fd, uint8_t byte) {
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return send(client_fd, &byte, 1, 0);
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}
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ssize_t writeUint16 (int client_fd, uint16_t num) {
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uint16_t be = htons(num);
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return send(client_fd, &be, sizeof(be), 0);
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}
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ssize_t writeUint32 (int client_fd, uint32_t num) {
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uint32_t be = htonl(num);
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return send(client_fd, &be, sizeof(be), 0);
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}
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ssize_t writeUint64 (int client_fd, uint64_t num) {
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uint64_t be = htonll(num);
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return send(client_fd, &be, sizeof(be), 0);
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}
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ssize_t writeFloat (int client_fd, float num) {
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uint32_t bits;
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memcpy(&bits, &num, sizeof(bits));
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bits = htonl(bits);
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return send(client_fd, &bits, sizeof(bits), 0);
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}
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ssize_t writeDouble (int client_fd, double num) {
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uint64_t bits;
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memcpy(&bits, &num, sizeof(bits));
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bits = htonll(bits);
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return send(client_fd, &bits, sizeof(bits), 0);
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}
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uint8_t readByte (int client_fd) {
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recv_count = recv(client_fd, recv_buffer, 1, MSG_WAITALL);
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return recv_buffer[0];
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}
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uint16_t readUint16 (int client_fd) {
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recv_count = recv(client_fd, recv_buffer, 2, MSG_WAITALL);
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return ((uint16_t)recv_buffer[0] << 8) | recv_buffer[1];
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}
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uint32_t readUint32 (int client_fd) {
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recv_count = recv(client_fd, recv_buffer, 4, MSG_WAITALL);
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return ((uint32_t)recv_buffer[0] << 24) |
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((uint32_t)recv_buffer[1] << 16) |
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((uint32_t)recv_buffer[2] << 8) |
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((uint32_t)recv_buffer[3]);
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}
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uint64_t readUint64 (int client_fd) {
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recv_count = recv(client_fd, recv_buffer, 8, MSG_WAITALL);
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return ((uint64_t)recv_buffer[0] << 56) |
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((uint64_t)recv_buffer[1] << 48) |
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((uint64_t)recv_buffer[2] << 40) |
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((uint64_t)recv_buffer[3] << 32) |
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((uint64_t)recv_buffer[4] << 24) |
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((uint64_t)recv_buffer[5] << 16) |
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((uint64_t)recv_buffer[6] << 8) |
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((uint64_t)recv_buffer[7]);
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}
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int64_t readInt64 (int client_fd) {
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recv_count = recv(client_fd, recv_buffer, 8, MSG_WAITALL);
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return ((int64_t)recv_buffer[0] << 56) |
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((int64_t)recv_buffer[1] << 48) |
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((int64_t)recv_buffer[2] << 40) |
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((int64_t)recv_buffer[3] << 32) |
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((int64_t)recv_buffer[4] << 24) |
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((int64_t)recv_buffer[5] << 16) |
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((int64_t)recv_buffer[6] << 8) |
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((int64_t)recv_buffer[7]);
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}
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float readFloat (int client_fd) {
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uint32_t bytes = readUint32(client_fd);
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float output;
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memcpy(&output, &bytes, sizeof(output));
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return output;
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}
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double readDouble (int client_fd) {
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uint64_t bytes = readUint64(client_fd);
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double output;
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memcpy(&output, &bytes, sizeof(output));
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return output;
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}
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void readString (int client_fd) {
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uint32_t length = readVarInt(client_fd);
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recv_count = recv(client_fd, recv_buffer, length, MSG_WAITALL);
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recv_buffer[recv_count] = '\0';
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}
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int client_states[MAX_PLAYERS * 2];
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void setClientState (int client_fd, int new_state) {
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for (int i = 0; i < MAX_PLAYERS * 2; i += 2) {
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if (client_states[i] != client_fd && client_states[i] != 0) continue;
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client_states[i] = client_fd;
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client_states[i + 1] = new_state;
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}
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}
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int getClientState (int client_fd) {
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for (int i = 0; i < MAX_PLAYERS * 2; i += 2) {
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if (client_states[i] != client_fd) continue;
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return client_states[i + 1];
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}
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return STATE_NONE;
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}
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int getClientIndex (int client_fd) {
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for (int i = 0; i < MAX_PLAYERS * 2; i += 2) {
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if (client_states[i] != client_fd) continue;
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return i;
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}
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return -1;
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}
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int reservePlayerData (int client_fd, char *uuid) {
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for (int i = 0; i < MAX_PLAYERS; i ++) {
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if (memcmp(player_data[i].uuid, uuid, 16) == 0) {
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player_data[i].client_fd = client_fd;
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return 0;
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}
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uint8_t empty = true;
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for (uint8_t j = 0; j < 16; j ++) {
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if (player_data[i].uuid[j] != 0) {
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empty = false;
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break;
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}
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}
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if (empty) {
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player_data[i].client_fd = client_fd;
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memcpy(player_data[i].uuid, uuid, 16);
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player_data[i].y = -32767;
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return 0;
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}
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}
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return 1;
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}
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int getPlayerData (int client_fd, PlayerData **output) {
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for (int i = 0; i < MAX_PLAYERS; i ++) {
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if (player_data[i].client_fd == client_fd) {
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*output = &player_data[i];
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return 0;
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}
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}
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return 1;
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}
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void clearPlayerFD (int client_fd) {
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for (int i = 0; i < MAX_PLAYERS; i ++) {
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if (player_data[i].client_fd == client_fd) {
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player_data[i].client_fd = 0;
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return;
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}
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}
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}
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uint8_t serverSlotToClientSlot (uint8_t slot) {
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if (slot >= 0 && slot <= 9) return slot + 36;
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if (slot >= 9 && slot <= 35) return slot;
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if (slot == 40) return 45;
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if (slot >= 36 && slot <= 39) return 3 - (slot - 36) + 5;
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return 255;
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}
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uint8_t clientSlotToServerSlot (int window_id, uint8_t slot) {
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if (window_id == 0) { // player inventory
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if (slot >= 36 && slot <= 44) return slot - 36;
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if (slot >= 9 && slot <= 35) return slot;
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if (slot == 45) return 40;
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if (slot >= 5 && slot <= 8) return 4 - (slot - 5) + 36;
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// map inventory crafting slots to player data crafting grid (semi-hack)
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// this abuses the fact that the buffers are adjacent in player data
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if (slot == 1) return 41;
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if (slot == 2) return 42;
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if (slot == 3) return 44;
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if (slot == 4) return 45;
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} else if (window_id == 12) { // crafting table
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// same crafting offset overflow hack as above
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if (slot >= 1 && slot <= 9) return 40 + slot;
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// the rest of the slots are identical, just shifted by one
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if (slot >= 10 && slot <= 45) return clientSlotToServerSlot(0, slot - 1);
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}
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return 255;
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}
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int givePlayerItem (int client_fd, uint16_t item) {
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PlayerData *player;
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if (getPlayerData(client_fd, &player)) return 1;
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uint8_t slot = 255;
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for (int i = 0; i < 41; i ++) {
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if (player->inventory_items[i] == item && player->inventory_count[i] < 64) {
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slot = i;
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break;
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}
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}
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if (slot == 255) {
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for (int i = 0; i < 41; i ++) {
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if (player->inventory_items[i] == 0 && player->inventory_count[i] == 0) {
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slot = i;
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break;
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}
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}
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}
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if (slot == 255) return 1;
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player->inventory_items[slot] = item;
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player->inventory_count[slot] ++;
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sc_setContainerSlot(client_fd, 0, serverSlotToClientSlot(slot), player->inventory_count[slot], item);
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return 0;
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}
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uint8_t getBlockChange (short x, short y, short z) {
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short tmp;
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for (int i = 0; i < block_changes_count; i ++) {
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if (block_changes[i].block == 0xFF) continue;
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if (
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block_changes[i].x == x &&
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block_changes[i].y == y &&
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block_changes[i].z == z
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) return block_changes[i].block;
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}
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return 0xFF;
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}
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void makeBlockChange (short x, short y, short z, uint8_t block) {
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short tmp;
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for (int i = 0; i < block_changes_count; i ++) {
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if (
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block_changes[i].x == x &&
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block_changes[i].y == y &&
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block_changes[i].z == z
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) {
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block_changes[i].block = block;
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return;
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}
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}
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block_changes[block_changes_count].x = x;
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block_changes[block_changes_count].y = y;
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block_changes[block_changes_count].z = z;
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block_changes[block_changes_count].block = block;
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block_changes_count ++;
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}
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