3 files changed, 16 insertions, 0 deletions
diff --git a/src/include/ndpi_main.h b/src/include/ndpi_main.h
index 78e8fdb4a..c8d9b06ae 100644
--- a/src/include/ndpi_main.h
+++ b/src/include/ndpi_main.h
@@ -152,6 +152,8 @@ extern "C" {
 					 const u_int8_t ** l4ptr, u_int16_t * l4len,
 					 u_int8_t * nxt_hdr);
   void ndpi_set_risk(struct ndpi_flow_struct *flow, ndpi_risk_enum r);
+  int ndpi_is_printable_string(char const * const str, size_t len);
+  float ndpi_calculate_entropy(u_int8_t const * const buf, size_t len);
 #ifdef __cplusplus
 }
 #endif
diff --git a/src/include/ndpi_typedefs.h b/src/include/ndpi_typedefs.h
index 860e2da1c..aeac33b30 100644
--- a/src/include/ndpi_typedefs.h
+++ b/src/include/ndpi_typedefs.h
@@ -102,6 +102,7 @@ typedef enum {
   NDPI_DESKTOP_OR_FILE_SHARING_SESSION, /* 30 */
   NDPI_TLS_UNCOMMON_ALPN,
   NDPI_TLS_CERT_VALIDITY_TOO_LONG,
+  NDPI_TLS_EXTENSION_SUSPICIOUS,
 
   /* Leave this as last member */
   NDPI_MAX_RISK /* must be <= 63 due to (**) */
diff --git a/src/include/ndpi_utils.h b/src/include/ndpi_utils.h
index b8176cc02..983aae283 100644
--- a/src/include/ndpi_utils.h
+++ b/src/include/ndpi_utils.h
@@ -16,4 +16,17 @@ extern void printRawData(const uint8_t *ptr, size_t len);
 //extern uint8_t add_segment_to_buffer( struct ndpi_flow_struct *flow, struct ndpi_tcphdr const * tcph, uint32_t waited);
 //extern uint8_t check_for_sequence( struct ndpi_flow_struct *flow, struct ndpi_tcphdr const * tcph);
 
+/* **************************************** */
+
+/* Can't call libc functions from kernel space, define some stub instead */
+
+#define ndpi_isalpha(ch) (((ch) >= 'a' && (ch) <= 'z') || ((ch) >= 'A' && (ch) <= 'Z'))
+#define ndpi_isdigit(ch) ((ch) >= '0' && (ch) <= '9')
+#define ndpi_isspace(ch) (((ch) >= '\t' && (ch) <= '\r') || ((ch) == ' '))
+#define ndpi_isprint(ch) ((ch) >= 0x20 && (ch) <= 0x7e)
+#define ndpi_ispunct(ch) (((ch) >= '!' && (ch) <= '/') ||   \
+              ((ch) >= ':' && (ch) <= '@') ||   \
+              ((ch) >= '[' && (ch) <= '`') ||   \
+              ((ch) >= '{' && (ch) <= '~'))
+
 #endif