http2/doc: list possible values for enum keywords

Ticket: 8675

doc/userguide/rules/http2-keywords.rst

@@ -26,6 +26,8 @@ http2.frametype is also a :ref:`multi-integer <multi-integers>`.
 
 http2.frametype does not have any corresponding log output.
 
+See ``suricata --list-keywords=json | jq '."http2.frametype".enum_values'``
+
 Examples::
 
   http2.frametype:GOAWAY;
@@ -40,6 +42,8 @@ http2.errorcode uses an :ref:`unsigned 32-bit integer <rules-integer-keywords>`.
 
 http2.errorcode is also a :ref:`multi-integer <multi-integers>`.
 
+See ``suricata --list-keywords=json | jq '."http2.errorcode".enum_values'``
+
 Examples::
 
   http2.errorcode: NO_ERROR;

rust/src/http2/detect.rs

@@ -25,12 +25,13 @@ use crate::detect::uint::{
     DetectUintArrayData, DetectUintData, DetectUintIndex, DetectUintMode,
 };
 use crate::detect::{DetectThreadBuf, EnumString};
+use crate::jsonbuilder::JsonBuilder;
 use crate::direction::Direction;
 use base64::{engine::general_purpose::STANDARD, Engine};
 use std::ffi::CStr;
 use std::os::raw::c_void;
 use std::rc::Rc;
-use suricata_sys::sys::DetectEngineThreadCtx;
+use suricata_sys::sys::{DetectEngineThreadCtx, SCJsonBuilder};
 
 #[no_mangle]
 pub unsafe extern "C" fn SCHttp2TxHasFrametype(
@@ -1178,3 +1179,15 @@ mod tests {
         }
     }
 }
+
+#[no_mangle]
+pub unsafe extern "C" fn SCDetectHTTP2frameTypeListValues(jsb: *mut SCJsonBuilder) {
+    let jsb = cast_pointer!(jsb, JsonBuilder);
+    let _ = parser::HTTP2FrameType::list_values(jsb);
+}
+
+#[no_mangle]
+pub unsafe extern "C" fn SCDetectHTTP2errorcodeListValues(jsb: *mut SCJsonBuilder) {
+    let jsb = cast_pointer!(jsb, JsonBuilder);
+    let _ = parser::HTTP2ErrorCode::list_values(jsb);
+}

src/detect-http2.c

@@ -97,6 +97,16 @@ static int g_http2_match_buffer_id = 0;
 static int g_http2_complete_buffer_id = 0;
 static int g_http2_header_buffer_id = 0;
 
+static void DetectHTTP2frameTypeListValues(SCJsonBuilder *jsb)
+{
+    SCDetectHTTP2frameTypeListValues(jsb);
+}
+
+static void DetectHTTP2errorcodeListValues(SCJsonBuilder *jsb)
+{
+    SCDetectHTTP2errorcodeListValues(jsb);
+}
+
 /**
  * \brief Registration function for HTTP2 keywords
  */
@@ -112,6 +122,7 @@ void DetectHttp2Register(void)
     sigmatch_table[DETECT_HTTP2_FRAMETYPE].Free = DetectHTTP2frametypeFree;
     sigmatch_table[DETECT_HTTP2_FRAMETYPE].flags =
             SIGMATCH_INFO_UINT8 | SIGMATCH_INFO_MULTI_UINT | SIGMATCH_INFO_ENUM_UINT;
+    sigmatch_table[DETECT_HTTP2_FRAMETYPE].JsonAdditionalInfo = DetectHTTP2frameTypeListValues;
 #ifdef UNITTESTS
     sigmatch_table[DETECT_HTTP2_FRAMETYPE].RegisterTests = DetectHTTP2frameTypeRegisterTests;
 #endif
@@ -125,6 +136,7 @@ void DetectHttp2Register(void)
     sigmatch_table[DETECT_HTTP2_ERRORCODE].Free = DetectHTTP2errorcodeFree;
     sigmatch_table[DETECT_HTTP2_ERRORCODE].flags =
             SIGMATCH_INFO_UINT32 | SIGMATCH_INFO_MULTI_UINT | SIGMATCH_INFO_ENUM_UINT;
+    sigmatch_table[DETECT_HTTP2_ERRORCODE].JsonAdditionalInfo = DetectHTTP2errorcodeListValues;
 #ifdef UNITTESTS
     sigmatch_table[DETECT_HTTP2_ERRORCODE].RegisterTests = DetectHTTP2errorCodeRegisterTests;
 #endif