From 2121ec6786d70362a3a8606c0807606f59b9b0e9 Mon Sep 17 00:00:00 2001
From: ENGO150 <v.smejkal06@gmail.com>
Date: Sat, 27 Jan 2024 18:40:12 +0100
Subject: [PATCH] checking for anon & server username

blocking them also
---
 src/chat/misc.c | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/src/chat/misc.c b/src/chat/misc.c
index ebf3fff..fa372b3 100644
--- a/src/chat/misc.c
+++ b/src/chat/misc.c
@@ -21,6 +21,7 @@ along with this program.  If not, see <https://www.gnu.org/licenses/>.
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <ctype.h>
 #include <sys/socket.h>
 #include <unistd.h>
 
@@ -189,8 +190,31 @@ void remove_json_syntax_characters(char *text)
     }
 }
 
+void lowercase(char *string)
+{
+    for (unsigned long i = 0; i < strlen(string); i++)
+    {
+        string[i] = tolower(string[i]);
+    }
+}
+
+why2_bool username_equal(char *u1, char *u2)
+{
+    char *one = why2_strdup(u1);
+    char *two = why2_strdup(u2);
+
+    //LOWERCASE
+    lowercase(one);
+    lowercase(two);
+
+    return strcmp(one, two) == 0;
+}
+
 why2_bool check_username(char *username)
 {
+    if (username_equal(username, WHY2_CHAT_SERVER_USERNAME)) return 0; //DISABLE 'server' USERNAME
+    if (username_equal(username, WHY2_DEFAULT_USERNAME)) return 0; //DISABLE 'anon' USERNAME DUE TO ONE USERNAME PER SERVER
+
     for (unsigned long i = 0; i < strlen(username); i++)
     {
         if (!((username[i] >= 48 && username[i] <= 57) ||