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Sanitize Chat

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This commit is contained in:
TheBrokenRail 2021-02-21 22:16:05 -05:00
parent 615a3a28a0
commit 7b6fa15893
1 changed files with 24 additions and 0 deletions
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24
mods/src/chat/chat.cpp
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@ -1,4 +1,5 @@
#include <string> #include <string>
#include <cstring>
#include <cstdio> #include <cstdio>
#include <vector> #include <vector>
#include <pthread.h> #include <pthread.h>
@ -10,6 +11,11 @@
#include "chat.h" #include "chat.h"
// Message Limitations
#define MAX_MESSAGE_LENGTH 512
#define MINIMUM_MESSAGE_CHARACTER 32
#define MAXIMUM_MESSAGE_CHARACTER 126
// Send API Command // Send API Command
static void send_api_command(unsigned char *minecraft, char *str) { static void send_api_command(unsigned char *minecraft, char *str) {
struct ConnectedClient client; struct ConnectedClient client;
@ -30,11 +36,29 @@ static void send_api_chat_command(unsigned char *minecraft, char *str) {
free(command); free(command);
} }
// Sanitize Message
static void sanitize_message(char **message) {
// Store Message Length
int length = strlen(*message);
// Truncate Message
if (length > MAX_MESSAGE_LENGTH) {
(*message)[MAX_MESSAGE_LENGTH] = '\0';
length = MAX_MESSAGE_LENGTH;
}
// Loop Through Message
for (int i = 0; i < length; i++) {
if ((*message)[i] < MINIMUM_MESSAGE_CHARACTER || (*message)[i] > MAXIMUM_MESSAGE_CHARACTER) {
// Replace Illegal Character
(*message)[i] = '?';
}
}
}
// Send Message To Players // Send Message To Players
static void send_message(unsigned char *server_side_network_handler, char *username, char *message) { static void send_message(unsigned char *server_side_network_handler, char *username, char *message) {
char *full_message = NULL; char *full_message = NULL;
asprintf(&full_message, "<%s> %s", username, message); asprintf(&full_message, "<%s> %s", username, message);
ALLOC_CHECK(full_message); ALLOC_CHECK(full_message);
sanitize_message(&full_message);
(*ServerSideNetworkHandler_displayGameMessage)(server_side_network_handler, std::string(full_message)); (*ServerSideNetworkHandler_displayGameMessage)(server_side_network_handler, std::string(full_message));
free(full_message); free(full_message);
} }