Add new config flag REGEX_IGNORECASE that can be enabled to make FTL's regex case insensitive. It defaults to false (legacy behavior).

Signed-off-by: DL6ER <dl6er@dl6er.de>

src/config.c

@@ -332,6 +332,19 @@ void read_FTLconf(void)
 	else
 		logg("   PARSE_ARP_CACHE: Inactive");
 
+	// REGEX_IGNORECASE
+	// defaults to: No
+	config.regex_ignorecase = false;
+	buffer = parse_FTLconf(fp, "REGEX_IGNORECASE");
+
+	if(buffer != NULL && strcasecmp(buffer, "true") == 0)
+		config.regex_ignorecase = true;
+
+	if(config.regex_ignorecase)
+		logg("   REGEX_IGNORECASE: Enabled. Regex is case insensitive");
+	else
+		logg("   REGEX_IGNORECASE: Disabled. Regex is case sensitive");
+
 	// Read DEBUG_... setting from pihole-FTL.conf
 	read_debuging_settings(fp);
 

src/config.h

@@ -32,6 +32,7 @@ typedef struct {
 	bool analyze_only_A_AAAA;
 	bool DBimport;
 	bool parse_arp_cache;
+	bool regex_ignorecase;
 } ConfigStruct;
 
 typedef struct {

src/regex.c

@@ -39,7 +39,10 @@ static bool init_regex(const char *regexin, const int index)
 {
 	// compile regular expressions into data structures that
 	// can be used with regexec to match against a string
-	const int errcode = regcomp(&regex[index], regexin, REG_EXTENDED);
+	int regflags = REG_EXTENDED;
+	if(config.regex_ignorecase)
+		regflags |= REG_ICASE;
+	const int errcode = regcomp(&regex[index], regexin, regflags);
 	if(errcode != 0)
 	{
 		log_regex_error("compiling", errcode, index);