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Code Issues Activity

implement chat messages

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p2r3
2025-08-21 17:45:39 +03:00
parent 33c564e0fc
commit 05862bf62a
3 changed files with 55 additions and 0 deletions
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7
src/main.c
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@@ -111,6 +111,13 @@ void handlePacket (int client_fd, int length, int packet_id) {
}
break;
case 0x08:
if (state == STATE_PLAY) {
cs_chat(client_fd);
return;
}
break;
case 0x0B:
if (state == STATE_PLAY) {
if (cs_clientStatus(client_fd)) break;

47
src/packets.c
View File

@@ -901,6 +901,7 @@ int cs_clientStatus (int client_fd) {
return 0;
}
// S->C System Chat
int sc_systemChat (int client_fd, char* message, uint16_t len) {
writeVarInt(client_fd, 5 + len);
@@ -916,6 +917,52 @@ int sc_systemChat (int client_fd, char* message, uint16_t len) {
}
// C->S Chat
int cs_chat (int client_fd) {
readString(client_fd);
PlayerData *player;
if (getPlayerData(client_fd, &player)) return 1;
size_t message_len = strlen(recv_buffer);
uint8_t name_len = strlen(player->name);
// To be safe, cap messages to 32 bytes before the buffer length
if (message_len > 224) {
recv_buffer[224] = '\0';
message_len = 224;
}
// Shift message contents forward to make space for player name tag
memmove(recv_buffer + name_len + 3, recv_buffer, message_len + 1);
// Copy player name to index 1
memcpy(recv_buffer + 1, player->name, name_len);
// Surround player name with brackets and a space
recv_buffer[0] = '<';
recv_buffer[name_len + 1] = '>';
recv_buffer[name_len + 2] = ' ';
// Forward message to all connected players
for (int i = 0; i < MAX_PLAYERS; i ++) {
if (player_data[i].client_fd == -1) continue;
sc_systemChat(client_fd, recv_buffer, message_len + name_len + 3);
}
readUint64(client_fd); // Ignore timestamp
readUint64(client_fd); // Ignore salt
// Ignore signature (if any)
uint8_t has_signature = readByte(client_fd);
if (has_signature) recv_all(client_fd, recv_buffer, 256, false);
readVarInt(client_fd); // Ignore message count
readUint32(client_fd); // Ignore acknowledgement bitmask
readByte(client_fd); // Ignore checksum
return 0;
}
// S->C Registry Data (multiple packets) and Update Tags (configuration, multiple packets)
int sc_registries (int client_fd) {