rust/src/http2/http2.rs

   1 /* Copyright (C) 2020 Open Information Security Foundation
   2  *
   3  * You can copy, redistribute or modify this Program under the terms of
   4  * the GNU General Public License version 2 as published by the Free
   5  * Software Foundation.
   6  *
   7  * This program is distributed in the hope that it will be useful,
   8  * but WITHOUT ANY WARRANTY; without even the implied warranty of
   9  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  10  * GNU General Public License for more details.
  11  *
  12  * You should have received a copy of the GNU General Public License
  13  * version 2 along with this program; if not, write to the Free Software
  14  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  15  * 02110-1301, USA.
  16  */
  17
  18 use super::files::*;
  19 use super::parser;
  20 use crate::applayer::{self, *};
  21 use crate::core::{
  22     self, AppProto, Flow, SuricataFileContext, ALPROTO_FAILED, ALPROTO_UNKNOWN, IPPROTO_TCP,
  23     STREAM_TOCLIENT, STREAM_TOSERVER,
  24 };
  25 use crate::filecontainer::*;
  26 use crate::filetracker::*;
  27 use nom;
  28 use std;
  29 use std::ffi::{CStr, CString};
  30 use std::fmt;
  31 use std::mem::transmute;
  32
  33 static mut ALPROTO_HTTP2: AppProto = ALPROTO_UNKNOWN;
  34
  35 const HTTP2_DEFAULT_MAX_FRAME_SIZE: u32 = 16384;
  36 const HTTP2_MAX_HANDLED_FRAME_SIZE: usize = 65536;
  37 const HTTP2_MIN_HANDLED_FRAME_SIZE: usize = 256;
  38
  39 pub static mut SURICATA_HTTP2_FILE_CONFIG: Option<&'static SuricataFileContext> = None;
  40
  41 #[no_mangle]
  42 pub extern "C" fn rs_http2_init(context: &'static mut SuricataFileContext) {
  43     unsafe {
  44         SURICATA_HTTP2_FILE_CONFIG = Some(context);
  45     }
  46 }
  47
  48 #[repr(u8)]
  49 #[derive(Copy, Clone, PartialOrd, PartialEq)]
  50 pub enum HTTP2ConnectionState {
  51     Http2StateInit = 0,
  52     Http2StateMagicDone = 1,
  53 }
  54
  55 const HTTP2_FRAME_HEADER_LEN: usize = 9;
  56 const HTTP2_MAGIC_LEN: usize = 24;
  57 const HTTP2_FRAME_GOAWAY_LEN: usize = 4;
  58 const HTTP2_FRAME_RSTSTREAM_LEN: usize = 4;
  59 const HTTP2_FRAME_PRIORITY_LEN: usize = 1;
  60 const HTTP2_FRAME_WINDOWUPDATE_LEN: usize = 4;
  61 //TODO make this configurable
  62 pub const HTTP2_MAX_TABLESIZE: u32 = 0x10000; // 65536
  63
  64 #[repr(u8)]
  65 #[derive(Copy, Clone, PartialOrd, PartialEq, Debug)]
  66 pub enum HTTP2FrameUnhandledReason {
  67     UnknownType = 0,
  68     TooLong = 1,
  69     ParsingError = 2,
  70     Incomplete = 3,
  71 }
  72
  73 impl fmt::Display for HTTP2FrameUnhandledReason {
  74     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
  75         write!(f, "{:?}", self)
  76     }
  77 }
  78
  79 #[derive(Debug)]
  80 pub struct HTTP2FrameUnhandled {
  81     pub reason: HTTP2FrameUnhandledReason,
  82 }
  83
  84 pub enum HTTP2FrameTypeData {
  85     PRIORITY(parser::HTTP2FramePriority),
  86     GOAWAY(parser::HTTP2FrameGoAway),
  87     RSTSTREAM(parser::HTTP2FrameRstStream),
  88     SETTINGS(Vec<parser::HTTP2FrameSettings>),
  89     WINDOWUPDATE(parser::HTTP2FrameWindowUpdate),
  90     HEADERS(parser::HTTP2FrameHeaders),
  91     PUSHPROMISE(parser::HTTP2FramePushPromise),
  92     CONTINUATION(parser::HTTP2FrameContinuation),
  93     PING,
  94     DATA,
  95     //not a defined frame
  96     UNHANDLED(HTTP2FrameUnhandled),
  97 }
  98
  99 #[repr(u8)]
 100 #[derive(Copy, Clone, PartialOrd, PartialEq, Debug)]
 101 pub enum HTTP2TransactionState {
 102     HTTP2StateIdle = 0,
 103     HTTP2StateOpen = 1,
 104     HTTP2StateReserved = 2,
 105     HTTP2StateDataClient = 3,
 106     HTTP2StateHalfClosedClient = 4,
 107     HTTP2StateDataServer = 5,
 108     HTTP2StateHalfClosedServer = 6,
 109     HTTP2StateClosed = 7,
 110     //not a RFC-defined state, used for stream 0 frames appyling to the global connection
 111     HTTP2StateGlobal = 8,
 112 }
 113
 114 pub struct HTTP2Frame {
 115     pub header: parser::HTTP2FrameHeader,
 116     pub data: HTTP2FrameTypeData,
 117 }
 118
 119 pub struct HTTP2Transaction {
 120     tx_id: u64,
 121     pub stream_id: u32,
 122     pub state: HTTP2TransactionState,
 123     child_stream_id: u32,
 124
 125     pub frames_tc: Vec<HTTP2Frame>,
 126     pub frames_ts: Vec<HTTP2Frame>,
 127
 128     de_state: Option<*mut core::DetectEngineState>,
 129     events: *mut core::AppLayerDecoderEvents,
 130     tx_data: AppLayerTxData,
 131     ft: FileTransferTracker,
 132
 133     //temporary escaped header for detection
 134     //must be attached to transaction for memory management (be freed at the right time)
 135     pub escaped: Vec<Vec<u8>>,
 136 }
 137
 138 impl HTTP2Transaction {
 139     pub fn new() -> HTTP2Transaction {
 140         HTTP2Transaction {
 141             tx_id: 0,
 142             stream_id: 0,
 143             child_stream_id: 0,
 144             state: HTTP2TransactionState::HTTP2StateIdle,
 145             frames_tc: Vec::new(),
 146             frames_ts: Vec::new(),
 147             de_state: None,
 148             events: std::ptr::null_mut(),
 149             tx_data: AppLayerTxData::new(),
 150             ft: FileTransferTracker::new(),
 151             escaped: Vec::with_capacity(16),
 152         }
 153     }
 154
 155     pub fn free(&mut self) {
 156         if self.events != std::ptr::null_mut() {
 157             core::sc_app_layer_decoder_events_free_events(&mut self.events);
 158         }
 159         if let Some(state) = self.de_state {
 160             core::sc_detect_engine_state_free(state);
 161         }
 162     }
 163
 164     fn handle_frame(
 165         &mut self, header: &parser::HTTP2FrameHeader, data: &HTTP2FrameTypeData, dir: u8,
 166     ) {
 167         //handle child_stream_id changes
 168         match data {
 169             HTTP2FrameTypeData::PUSHPROMISE(hs) => {
 170                 if dir == STREAM_TOCLIENT {
 171                     //we could set an event if self.child_stream_id != 0
 172                     if header.flags & parser::HTTP2_FLAG_HEADER_END_HEADERS == 0 {
 173                         self.child_stream_id = hs.stream_id;
 174                     }
 175                     self.state = HTTP2TransactionState::HTTP2StateReserved;
 176                 }
 177             }
 178             HTTP2FrameTypeData::CONTINUATION(_) => {
 179                 if dir == STREAM_TOCLIENT
 180                     && header.flags & parser::HTTP2_FLAG_HEADER_END_HEADERS != 0
 181                 {
 182                     self.child_stream_id = 0;
 183                 }
 184             }
 185             HTTP2FrameTypeData::HEADERS(_) => {
 186                 if dir == STREAM_TOCLIENT {
 187                     self.child_stream_id = 0;
 188                 }
 189             }
 190             HTTP2FrameTypeData::RSTSTREAM(_) => {
 191                 self.child_stream_id = 0;
 192             }
 193             _ => {}
 194         }
 195         //handle closing state changes
 196         match data {
 197             HTTP2FrameTypeData::HEADERS(_) | HTTP2FrameTypeData::DATA => {
 198                 if header.flags & parser::HTTP2_FLAG_HEADER_EOS != 0 {
 199                     match self.state {
 200                         HTTP2TransactionState::HTTP2StateHalfClosedClient
 201                         | HTTP2TransactionState::HTTP2StateDataServer => {
 202                             if dir == STREAM_TOCLIENT {
 203                                 self.state = HTTP2TransactionState::HTTP2StateClosed;
 204                             }
 205                         }
 206                         HTTP2TransactionState::HTTP2StateHalfClosedServer => {
 207                             if dir == STREAM_TOSERVER {
 208                                 self.state = HTTP2TransactionState::HTTP2StateClosed;
 209                             }
 210                         }
 211                         // do not revert back to a half closed state
 212                         HTTP2TransactionState::HTTP2StateClosed => {}
 213                         HTTP2TransactionState::HTTP2StateGlobal => {}
 214                         _ => {
 215                             if dir == STREAM_TOCLIENT {
 216                                 self.state = HTTP2TransactionState::HTTP2StateHalfClosedServer;
 217                             } else {
 218                                 self.state = HTTP2TransactionState::HTTP2StateHalfClosedClient;
 219                             }
 220                         }
 221                     }
 222                 } else if header.ftype == parser::HTTP2FrameType::DATA as u8 {
 223                     //not end of stream
 224                     if dir == STREAM_TOSERVER {
 225                         if self.state < HTTP2TransactionState::HTTP2StateDataClient {
 226                             self.state = HTTP2TransactionState::HTTP2StateDataClient;
 227                         }
 228                     } else {
 229                         if self.state < HTTP2TransactionState::HTTP2StateDataServer {
 230                             self.state = HTTP2TransactionState::HTTP2StateDataServer;
 231                         }
 232                     }
 233                 }
 234             }
 235             _ => {}
 236         }
 237     }
 238 }
 239
 240 impl Drop for HTTP2Transaction {
 241     fn drop(&mut self) {
 242         self.free();
 243     }
 244 }
 245
 246 #[repr(u32)]
 247 pub enum HTTP2Event {
 248     InvalidFrameHeader = 0,
 249     InvalidClientMagic,
 250     InvalidFrameData,
 251     InvalidHeader,
 252     InvalidFrameLength,
 253     ExtraHeaderData,
 254     LongFrameData,
 255     StreamIdReuse,
 256     InvalidHTTP1Settings,
 257 }
 258
 259 impl HTTP2Event {
 260     fn from_i32(value: i32) -> Option<HTTP2Event> {
 261         match value {
 262             0 => Some(HTTP2Event::InvalidFrameHeader),
 263             1 => Some(HTTP2Event::InvalidClientMagic),
 264             2 => Some(HTTP2Event::InvalidFrameData),
 265             3 => Some(HTTP2Event::InvalidHeader),
 266             4 => Some(HTTP2Event::InvalidFrameLength),
 267             5 => Some(HTTP2Event::ExtraHeaderData),
 268             6 => Some(HTTP2Event::LongFrameData),
 269             7 => Some(HTTP2Event::StreamIdReuse),
 270             8 => Some(HTTP2Event::InvalidHTTP1Settings),
 271             _ => None,
 272         }
 273     }
 274 }
 275
 276 pub struct HTTP2DynTable {
 277     pub table: Vec<parser::HTTP2FrameHeaderBlock>,
 278     pub current_size: usize,
 279     pub max_size: usize,
 280     pub overflow: u8,
 281 }
 282
 283 impl HTTP2DynTable {
 284     pub fn new() -> Self {
 285         Self {
 286             table: Vec::with_capacity(64),
 287             current_size: 0,
 288             max_size: 4096, //default value
 289             overflow: 0,
 290         }
 291     }
 292 }
 293
 294 pub struct HTTP2State {
 295     tx_id: u64,
 296     request_frame_size: u32,
 297     response_frame_size: u32,
 298     dynamic_headers_ts: HTTP2DynTable,
 299     dynamic_headers_tc: HTTP2DynTable,
 300     transactions: Vec<HTTP2Transaction>,
 301     progress: HTTP2ConnectionState,
 302     pub files: HTTP2Files,
 303 }
 304
 305 impl HTTP2State {
 306     pub fn new() -> Self {
 307         Self {
 308             tx_id: 0,
 309             request_frame_size: 0,
 310             response_frame_size: 0,
 311             // the headers are encoded on one byte
 312             // with a fixed number of static headers, and
 313             // a variable number of dynamic headers
 314             dynamic_headers_ts: HTTP2DynTable::new(),
 315             dynamic_headers_tc: HTTP2DynTable::new(),
 316             transactions: Vec::new(),
 317             progress: HTTP2ConnectionState::Http2StateInit,
 318             files: HTTP2Files::new(),
 319         }
 320     }
 321
 322     pub fn free(&mut self) {
 323         self.transactions.clear();
 324         self.files.free();
 325     }
 326
 327     pub fn set_event(&mut self, event: HTTP2Event) {
 328         let len = self.transactions.len();
 329         if len == 0 {
 330             return;
 331         }
 332         let tx = &mut self.transactions[len - 1];
 333         let ev = event as u8;
 334         core::sc_app_layer_decoder_events_set_event_raw(&mut tx.events, ev);
 335     }
 336
 337     // Free a transaction by ID.
 338     fn free_tx(&mut self, tx_id: u64) {
 339         let len = self.transactions.len();
 340         let mut found = false;
 341         let mut index = 0;
 342         for i in 0..len {
 343             let tx = &self.transactions[i];
 344             if tx.tx_id == tx_id + 1 {
 345                 found = true;
 346                 index = i;
 347                 break;
 348             }
 349         }
 350         if found {
 351             self.transactions.remove(index);
 352         }
 353     }
 354
 355     pub fn get_tx(&mut self, tx_id: u64) -> Option<&HTTP2Transaction> {
 356         for tx in &mut self.transactions {
 357             if tx.tx_id == tx_id + 1 {
 358                 return Some(tx);
 359             }
 360         }
 361         return None;
 362     }
 363
 364     fn find_tx_index(&mut self, sid: u32, header: &parser::HTTP2FrameHeader) -> usize {
 365         for i in 0..self.transactions.len() {
 366             //reverse order should be faster
 367             let idx = self.transactions.len() - 1 - i;
 368             if sid == self.transactions[idx].stream_id {
 369                 if self.transactions[idx].state == HTTP2TransactionState::HTTP2StateClosed {
 370                     //these frames can be received in this state for a short period
 371                     if header.ftype != parser::HTTP2FrameType::RSTSTREAM as u8
 372                         && header.ftype != parser::HTTP2FrameType::WINDOWUPDATE as u8
 373                         && header.ftype != parser::HTTP2FrameType::PRIORITY as u8
 374                     {
 375                         self.set_event(HTTP2Event::StreamIdReuse);
 376                     }
 377                 }
 378                 return idx + 1;
 379             }
 380         }
 381         return 0;
 382     }
 383
 384     fn find_child_stream_id(&mut self, sid: u32) -> u32 {
 385         for i in 0..self.transactions.len() {
 386             //reverse order should be faster
 387             if sid == self.transactions[self.transactions.len() - 1 - i].stream_id {
 388                 if self.transactions[self.transactions.len() - 1 - i].child_stream_id > 0 {
 389                     return self.transactions[self.transactions.len() - 1 - i].child_stream_id;
 390                 }
 391                 return sid;
 392             }
 393         }
 394         return sid;
 395     }
 396
 397     fn create_global_tx(&mut self) -> &mut HTTP2Transaction {
 398         //special transaction with only one frame
 399         //as it affects the global connection, there is no end to it
 400         let mut tx = HTTP2Transaction::new();
 401         self.tx_id += 1;
 402         tx.tx_id = self.tx_id;
 403         tx.state = HTTP2TransactionState::HTTP2StateGlobal;
 404         self.transactions.push(tx);
 405         return self.transactions.last_mut().unwrap();
 406     }
 407
 408     pub fn find_or_create_tx(
 409         &mut self, header: &parser::HTTP2FrameHeader, data: &HTTP2FrameTypeData, dir: u8,
 410     ) -> &mut HTTP2Transaction {
 411         if header.stream_id == 0 {
 412             return self.create_global_tx();
 413         }
 414         let sid = match data {
 415             //yes, the right stream_id for Suricata is not the header one
 416             HTTP2FrameTypeData::PUSHPROMISE(hs) => hs.stream_id,
 417             HTTP2FrameTypeData::CONTINUATION(_) => {
 418                 if dir == STREAM_TOCLIENT {
 419                     //continuation of a push promise
 420                     self.find_child_stream_id(header.stream_id)
 421                 } else {
 422                     header.stream_id
 423                 }
 424             }
 425             _ => header.stream_id,
 426         };
 427         let index = self.find_tx_index(sid, header);
 428         if index > 0 {
 429             return &mut self.transactions[index - 1];
 430         } else {
 431             let mut tx = HTTP2Transaction::new();
 432             self.tx_id += 1;
 433             tx.tx_id = self.tx_id;
 434             tx.stream_id = sid;
 435             tx.state = HTTP2TransactionState::HTTP2StateOpen;
 436             self.transactions.push(tx);
 437             return self.transactions.last_mut().unwrap();
 438         }
 439     }
 440
 441     fn parse_frame_data(
 442         &mut self, ftype: u8, input: &[u8], complete: bool, hflags: u8, dir: u8,
 443     ) -> HTTP2FrameTypeData {
 444         match num::FromPrimitive::from_u8(ftype) {
 445             Some(parser::HTTP2FrameType::GOAWAY) => {
 446                 if input.len() < HTTP2_FRAME_GOAWAY_LEN {
 447                     self.set_event(HTTP2Event::InvalidFrameLength);
 448                     return HTTP2FrameTypeData::UNHANDLED(HTTP2FrameUnhandled {
 449                         reason: HTTP2FrameUnhandledReason::Incomplete,
 450                     });
 451                 }
 452                 match parser::http2_parse_frame_goaway(input) {
 453                     Ok((_, goaway)) => {
 454                         return HTTP2FrameTypeData::GOAWAY(goaway);
 455                     }
 456                     Err(_) => {
 457                         self.set_event(HTTP2Event::InvalidFrameData);
 458                         return HTTP2FrameTypeData::UNHANDLED(HTTP2FrameUnhandled {
 459                             reason: HTTP2FrameUnhandledReason::ParsingError,
 460                         });
 461                     }
 462                 }
 463             }
 464             Some(parser::HTTP2FrameType::SETTINGS) => {
 465                 match parser::http2_parse_frame_settings(input) {
 466                     Ok((_, set)) => {
 467                         for i in 0..set.len() {
 468                             if set[i].id == parser::HTTP2SettingsId::SETTINGSHEADERTABLESIZE {
 469                                 //set for both endpoints ? to be tested
 470                                 self.dynamic_headers_tc.max_size = set[i].value as usize;
 471                                 self.dynamic_headers_ts.max_size = set[i].value as usize;
 472                                 if set[i].value > HTTP2_MAX_TABLESIZE {
 473                                     //mark potential overflow
 474                                     self.dynamic_headers_tc.overflow = 1;
 475                                     self.dynamic_headers_ts.overflow = 1;
 476                                 } else {
 477                                     //reset in case peer set a lower value, to be tested
 478                                     self.dynamic_headers_tc.overflow = 0;
 479                                     self.dynamic_headers_ts.overflow = 0;
 480                                 }
 481                             }
 482                         }
 483                         //we could set an event on remaining data
 484                         return HTTP2FrameTypeData::SETTINGS(set);
 485                     }
 486                     Err(nom::Err::Incomplete(_)) => {
 487                         if complete {
 488                             self.set_event(HTTP2Event::InvalidFrameData);
 489                             return HTTP2FrameTypeData::UNHANDLED(HTTP2FrameUnhandled {
 490                                 reason: HTTP2FrameUnhandledReason::ParsingError,
 491                             });
 492                         } else {
 493                             return HTTP2FrameTypeData::UNHANDLED(HTTP2FrameUnhandled {
 494                                 reason: HTTP2FrameUnhandledReason::TooLong,
 495                             });
 496                         }
 497                     }
 498                     Err(_) => {
 499                         self.set_event(HTTP2Event::InvalidFrameData);
 500                         return HTTP2FrameTypeData::UNHANDLED(HTTP2FrameUnhandled {
 501                             reason: HTTP2FrameUnhandledReason::ParsingError,
 502                         });
 503                     }
 504                 }
 505             }
 506             Some(parser::HTTP2FrameType::RSTSTREAM) => {
 507                 if input.len() != HTTP2_FRAME_RSTSTREAM_LEN {
 508                     self.set_event(HTTP2Event::InvalidFrameLength);
 509                     return HTTP2FrameTypeData::UNHANDLED(HTTP2FrameUnhandled {
 510                         reason: HTTP2FrameUnhandledReason::Incomplete,
 511                     });
 512                 } else {
 513                     match parser::http2_parse_frame_rststream(input) {
 514                         Ok((_, rst)) => {
 515                             return HTTP2FrameTypeData::RSTSTREAM(rst);
 516                         }
 517                         Err(_) => {
 518                             self.set_event(HTTP2Event::InvalidFrameData);
 519                             return HTTP2FrameTypeData::UNHANDLED(HTTP2FrameUnhandled {
 520                                 reason: HTTP2FrameUnhandledReason::ParsingError,
 521                             });
 522                         }
 523                     }
 524                 }
 525             }
 526             Some(parser::HTTP2FrameType::PRIORITY) => {
 527                 if input.len() != HTTP2_FRAME_PRIORITY_LEN {
 528                     self.set_event(HTTP2Event::InvalidFrameLength);
 529                     return HTTP2FrameTypeData::UNHANDLED(HTTP2FrameUnhandled {
 530                         reason: HTTP2FrameUnhandledReason::Incomplete,
 531                     });
 532                 } else {
 533                     match parser::http2_parse_frame_priority(input) {
 534                         Ok((_, priority)) => {
 535                             return HTTP2FrameTypeData::PRIORITY(priority);
 536                         }
 537                         Err(_) => {
 538                             self.set_event(HTTP2Event::InvalidFrameData);
 539                             return HTTP2FrameTypeData::UNHANDLED(HTTP2FrameUnhandled {
 540                                 reason: HTTP2FrameUnhandledReason::ParsingError,
 541                             });
 542                         }
 543                     }
 544                 }
 545             }
 546             Some(parser::HTTP2FrameType::WINDOWUPDATE) => {
 547                 if input.len() != HTTP2_FRAME_WINDOWUPDATE_LEN {
 548                     self.set_event(HTTP2Event::InvalidFrameLength);
 549                     return HTTP2FrameTypeData::UNHANDLED(HTTP2FrameUnhandled {
 550                         reason: HTTP2FrameUnhandledReason::Incomplete,
 551                     });
 552                 } else {
 553                     match parser::http2_parse_frame_windowupdate(input) {
 554                         Ok((_, wu)) => {
 555                             return HTTP2FrameTypeData::WINDOWUPDATE(wu);
 556                         }
 557                         Err(_) => {
 558                             self.set_event(HTTP2Event::InvalidFrameData);
 559                             return HTTP2FrameTypeData::UNHANDLED(HTTP2FrameUnhandled {
 560                                 reason: HTTP2FrameUnhandledReason::ParsingError,
 561                             });
 562                         }
 563                     }
 564                 }
 565             }
 566             Some(parser::HTTP2FrameType::PUSHPROMISE) => {
 567                 let dyn_headers = if dir == STREAM_TOCLIENT {
 568                     &mut self.dynamic_headers_tc
 569                 } else {
 570                     &mut self.dynamic_headers_ts
 571                 };
 572                 match parser::http2_parse_frame_push_promise(input, hflags, dyn_headers) {
 573                     Ok((_, hs)) => {
 574                         for i in 0..hs.blocks.len() {
 575                             if hs.blocks[i].error
 576                                 >= parser::HTTP2HeaderDecodeStatus::HTTP2HeaderDecodeError
 577                             {
 578                                 self.set_event(HTTP2Event::InvalidHeader);
 579                             }
 580                         }
 581                         return HTTP2FrameTypeData::PUSHPROMISE(hs);
 582                     }
 583                     Err(nom::Err::Incomplete(_)) => {
 584                         if complete {
 585                             self.set_event(HTTP2Event::InvalidFrameData);
 586                             return HTTP2FrameTypeData::UNHANDLED(HTTP2FrameUnhandled {
 587                                 reason: HTTP2FrameUnhandledReason::ParsingError,
 588                             });
 589                         } else {
 590                             return HTTP2FrameTypeData::UNHANDLED(HTTP2FrameUnhandled {
 591                                 reason: HTTP2FrameUnhandledReason::TooLong,
 592                             });
 593                         }
 594                     }
 595                     Err(_) => {
 596                         self.set_event(HTTP2Event::InvalidFrameData);
 597                         return HTTP2FrameTypeData::UNHANDLED(HTTP2FrameUnhandled {
 598                             reason: HTTP2FrameUnhandledReason::ParsingError,
 599                         });
 600                     }
 601                 }
 602             }
 603             Some(parser::HTTP2FrameType::DATA) => {
 604                 return HTTP2FrameTypeData::DATA;
 605             }
 606             Some(parser::HTTP2FrameType::CONTINUATION) => {
 607                 let dyn_headers = if dir == STREAM_TOCLIENT {
 608                     &mut self.dynamic_headers_tc
 609                 } else {
 610                     &mut self.dynamic_headers_ts
 611                 };
 612                 match parser::http2_parse_frame_continuation(input, dyn_headers) {
 613                     Ok((_, hs)) => {
 614                         for i in 0..hs.blocks.len() {
 615                             if hs.blocks[i].error
 616                                 >= parser::HTTP2HeaderDecodeStatus::HTTP2HeaderDecodeError
 617                             {
 618                                 self.set_event(HTTP2Event::InvalidHeader);
 619                             }
 620                         }
 621                         return HTTP2FrameTypeData::CONTINUATION(hs);
 622                     }
 623                     Err(nom::Err::Incomplete(_)) => {
 624                         if complete {
 625                             self.set_event(HTTP2Event::InvalidFrameData);
 626                             return HTTP2FrameTypeData::UNHANDLED(HTTP2FrameUnhandled {
 627                                 reason: HTTP2FrameUnhandledReason::ParsingError,
 628                             });
 629                         } else {
 630                             return HTTP2FrameTypeData::UNHANDLED(HTTP2FrameUnhandled {
 631                                 reason: HTTP2FrameUnhandledReason::TooLong,
 632                             });
 633                         }
 634                     }
 635                     Err(_) => {
 636                         self.set_event(HTTP2Event::InvalidFrameData);
 637                         return HTTP2FrameTypeData::UNHANDLED(HTTP2FrameUnhandled {
 638                             reason: HTTP2FrameUnhandledReason::ParsingError,
 639                         });
 640                     }
 641                 }
 642             }
 643             Some(parser::HTTP2FrameType::HEADERS) => {
 644                 let dyn_headers = if dir == STREAM_TOCLIENT {
 645                     &mut self.dynamic_headers_tc
 646                 } else {
 647                     &mut self.dynamic_headers_ts
 648                 };
 649                 match parser::http2_parse_frame_headers(input, hflags, dyn_headers) {
 650                     Ok((hrem, hs)) => {
 651                         for i in 0..hs.blocks.len() {
 652                             if hs.blocks[i].error
 653                                 >= parser::HTTP2HeaderDecodeStatus::HTTP2HeaderDecodeError
 654                             {
 655                                 self.set_event(HTTP2Event::InvalidHeader);
 656                             }
 657                         }
 658                         if hrem.len() > 0 {
 659                             SCLogDebug!("Remaining data for HTTP2 headers");
 660                             self.set_event(HTTP2Event::ExtraHeaderData);
 661                         }
 662                         return HTTP2FrameTypeData::HEADERS(hs);
 663                     }
 664                     Err(nom::Err::Incomplete(_)) => {
 665                         if complete {
 666                             self.set_event(HTTP2Event::InvalidFrameData);
 667                             return HTTP2FrameTypeData::UNHANDLED(HTTP2FrameUnhandled {
 668                                 reason: HTTP2FrameUnhandledReason::ParsingError,
 669                             });
 670                         } else {
 671                             return HTTP2FrameTypeData::UNHANDLED(HTTP2FrameUnhandled {
 672                                 reason: HTTP2FrameUnhandledReason::TooLong,
 673                             });
 674                         }
 675                     }
 676                     Err(_) => {
 677                         self.set_event(HTTP2Event::InvalidFrameData);
 678                         return HTTP2FrameTypeData::UNHANDLED(HTTP2FrameUnhandled {
 679                             reason: HTTP2FrameUnhandledReason::ParsingError,
 680                         });
 681                     }
 682                 }
 683             }
 684             Some(parser::HTTP2FrameType::PING) => {
 685                 return HTTP2FrameTypeData::PING;
 686             }
 687             _ => {
 688                 return HTTP2FrameTypeData::UNHANDLED(HTTP2FrameUnhandled {
 689                     reason: HTTP2FrameUnhandledReason::UnknownType,
 690                 });
 691             }
 692         }
 693     }
 694
 695     fn stream_data(&mut self, dir: u8, input: &[u8], over: bool, txid: u64) {
 696         match unsafe { SURICATA_HTTP2_FILE_CONFIG } {
 697             Some(sfcm) => {
 698                 for tx in &mut self.transactions {
 699                     if tx.tx_id == txid {
 700                         let xid: u32 = tx.tx_id as u32;
 701                         let (files, flags) = self.files.get(dir);
 702                         tx.ft.tx_id = tx.tx_id;
 703                         tx.ft.new_chunk(
 704                             sfcm,
 705                             files,
 706                             flags,
 707                             b"",
 708                             input,
 709                             tx.ft.tracked, //offset = append
 710                             input.len() as u32,
 711                             0,
 712                             over,
 713                             &xid,
 714                         );
 715                         break;
 716                     }
 717                 }
 718             }
 719             None => panic!("BUG"),
 720         }
 721     }
 722
 723     fn parse_frames(&mut self, mut input: &[u8], il: usize, dir: u8) -> AppLayerResult {
 724         while input.len() > 0 {
 725             match parser::http2_parse_frame_header(input) {
 726                 Ok((rem, head)) => {
 727                     let hl = head.length as usize;
 728
 729                     //we check for completeness first
 730                     if rem.len() < hl {
 731                         //but limit ourselves so as not to exhaust memory
 732                         if hl < HTTP2_MAX_HANDLED_FRAME_SIZE {
 733                             return AppLayerResult::incomplete(
 734                                 (il - input.len()) as u32,
 735                                 (HTTP2_FRAME_HEADER_LEN + hl) as u32,
 736                             );
 737                         } else if rem.len() < HTTP2_MIN_HANDLED_FRAME_SIZE {
 738                             return AppLayerResult::incomplete(
 739                                 (il - input.len()) as u32,
 740                                 (HTTP2_FRAME_HEADER_LEN + HTTP2_MIN_HANDLED_FRAME_SIZE) as u32,
 741                             );
 742                         } else {
 743                             self.set_event(HTTP2Event::LongFrameData);
 744                             self.request_frame_size = head.length - (rem.len() as u32);
 745                         }
 746                     }
 747
 748                     //get a safe length for the buffer
 749                     let (hlsafe, complete) = if rem.len() < hl {
 750                         (rem.len(), false)
 751                     } else {
 752                         (hl, true)
 753                     };
 754
 755                     if head.length == 0 && head.ftype == parser::HTTP2FrameType::SETTINGS as u8 {
 756                         input = &rem[hlsafe..];
 757                         continue;
 758                     }
 759                     let txdata = self.parse_frame_data(
 760                         head.ftype,
 761                         &rem[..hlsafe],
 762                         complete,
 763                         head.flags,
 764                         dir,
 765                     );
 766
 767                     let tx = self.find_or_create_tx(&head, &txdata, dir);
 768                     tx.handle_frame(&head, &txdata, dir);
 769                     let over = head.flags & parser::HTTP2_FLAG_HEADER_EOS != 0;
 770                     let txid = tx.tx_id;
 771                     let ftype = head.ftype;
 772                     if dir == STREAM_TOSERVER {
 773                         tx.frames_ts.push(HTTP2Frame {
 774                             header: head,
 775                             data: txdata,
 776                         });
 777                     } else {
 778                         tx.frames_tc.push(HTTP2Frame {
 779                             header: head,
 780                             data: txdata,
 781                         });
 782                     }
 783                     if ftype == parser::HTTP2FrameType::DATA as u8 {
 784                         self.stream_data(dir, &rem[..hlsafe], over, txid);
 785                     }
 786                     input = &rem[hlsafe..];
 787                 }
 788                 Err(nom::Err::Incomplete(_)) => {
 789                     //we may have consumed data from previous records
 790                     return AppLayerResult::incomplete(
 791                         (il - input.len()) as u32,
 792                         HTTP2_FRAME_HEADER_LEN as u32,
 793                     );
 794                 }
 795                 Err(_) => {
 796                     self.set_event(HTTP2Event::InvalidFrameHeader);
 797                     return AppLayerResult::err();
 798                 }
 799             }
 800         }
 801         return AppLayerResult::ok();
 802     }
 803
 804     fn parse_ts(&mut self, mut input: &[u8]) -> AppLayerResult {
 805         //very first : skip magic
 806         let mut magic_consumed = 0;
 807         if self.progress < HTTP2ConnectionState::Http2StateMagicDone {
 808             //skip magic
 809             if input.len() >= HTTP2_MAGIC_LEN {
 810                 //skip magic
 811                 match std::str::from_utf8(&input[..HTTP2_MAGIC_LEN]) {
 812                     Ok("PRI * HTTP/2.0\r\n\r\nSM\r\n\r\n") => {
 813                         input = &input[HTTP2_MAGIC_LEN..];
 814                         magic_consumed = HTTP2_MAGIC_LEN;
 815                     }
 816                     Ok(&_) => {
 817                         self.set_event(HTTP2Event::InvalidClientMagic);
 818                     }
 819                     Err(_) => {
 820                         return AppLayerResult::err();
 821                     }
 822                 }
 823                 self.progress = HTTP2ConnectionState::Http2StateMagicDone;
 824             } else {
 825                 //still more buffer
 826                 return AppLayerResult::incomplete(0 as u32, HTTP2_MAGIC_LEN as u32);
 827             }
 828         }
 829         //first consume frame bytes
 830         let il = input.len();
 831         if self.request_frame_size > 0 {
 832             let ilen = input.len() as u32;
 833             if self.request_frame_size >= ilen {
 834                 self.request_frame_size -= ilen;
 835                 return AppLayerResult::ok();
 836             } else {
 837                 let start = self.request_frame_size as usize;
 838                 input = &input[start..];
 839                 self.request_frame_size = 0;
 840             }
 841         }
 842
 843         //then parse all we can
 844         let r = self.parse_frames(input, il, STREAM_TOSERVER);
 845         if r.status == 1 {
 846             //adds bytes consumed by banner to incomplete result
 847             return AppLayerResult::incomplete(r.consumed + magic_consumed as u32, r.needed);
 848         } else {
 849             return r;
 850         }
 851     }
 852
 853     fn parse_tc(&mut self, mut input: &[u8]) -> AppLayerResult {
 854         //first consume frame bytes
 855         let il = input.len();
 856         if self.response_frame_size > 0 {
 857             let ilen = input.len() as u32;
 858             if self.response_frame_size >= ilen {
 859                 self.response_frame_size -= ilen;
 860                 return AppLayerResult::ok();
 861             } else {
 862                 let start = self.response_frame_size as usize;
 863                 input = &input[start..];
 864                 self.response_frame_size = 0;
 865             }
 866         }
 867         //then parse all we can
 868         return self.parse_frames(input, il, STREAM_TOCLIENT);
 869     }
 870
 871     fn tx_iterator(
 872         &mut self, min_tx_id: u64, state: &mut u64,
 873     ) -> Option<(&HTTP2Transaction, u64, bool)> {
 874         let mut index = *state as usize;
 875         let len = self.transactions.len();
 876
 877         while index < len {
 878             let tx = &self.transactions[index];
 879             if tx.tx_id < min_tx_id + 1 {
 880                 index += 1;
 881                 continue;
 882             }
 883             *state = index as u64;
 884             return Some((tx, tx.tx_id - 1, (len - index) > 1));
 885         }
 886
 887         return None;
 888     }
 889 }
 890
 891 // C exports.
 892
 893 export_tx_get_detect_state!(rs_http2_tx_get_detect_state, HTTP2Transaction);
 894 export_tx_set_detect_state!(rs_http2_tx_set_detect_state, HTTP2Transaction);
 895
 896 export_tx_data_get!(rs_http2_get_tx_data, HTTP2Transaction);
 897
 898 /// C entry point for a probing parser.
 899 #[no_mangle]
 900 pub extern "C" fn rs_http2_probing_parser_tc(
 901     _flow: *const Flow, _direction: u8, input: *const u8, input_len: u32, _rdir: *mut u8,
 902 ) -> AppProto {
 903     if input != std::ptr::null_mut() {
 904         let slice = build_slice!(input, input_len as usize);
 905         match parser::http2_parse_frame_header(slice) {
 906             Ok((_, header)) => {
 907                 if header.reserved != 0
 908                     || header.length > HTTP2_DEFAULT_MAX_FRAME_SIZE
 909                     || header.flags & 0xFE != 0
 910                     || header.ftype != parser::HTTP2FrameType::SETTINGS as u8
 911                 {
 912                     return unsafe { ALPROTO_FAILED };
 913                 }
 914                 return unsafe { ALPROTO_HTTP2 };
 915             }
 916             Err(nom::Err::Incomplete(_)) => {
 917                 return ALPROTO_UNKNOWN;
 918             }
 919             Err(_) => {
 920                 return unsafe { ALPROTO_FAILED };
 921             }
 922         }
 923     }
 924     return ALPROTO_UNKNOWN;
 925 }
 926
 927 /// Extern functions operating on HTTP2.
 928 extern "C" {
 929     pub fn HTTP2MimicHttp1Request(
 930         orig_state: *mut std::os::raw::c_void, new_state: *mut std::os::raw::c_void,
 931     );
 932 }
 933
 934 #[no_mangle]
 935 pub extern "C" fn rs_http2_state_new(
 936     orig_state: *mut std::os::raw::c_void, _orig_proto: AppProto,
 937 ) -> *mut std::os::raw::c_void {
 938     let state = HTTP2State::new();
 939     let boxed = Box::new(state);
 940     let r = unsafe { transmute(boxed) };
 941     if orig_state != std::ptr::null_mut() {
 942         //we could check ALPROTO_HTTP == orig_proto
 943         unsafe {
 944             HTTP2MimicHttp1Request(orig_state, r);
 945         }
 946     }
 947     return r;
 948 }
 949
 950 #[no_mangle]
 951 pub extern "C" fn rs_http2_state_free(state: *mut std::os::raw::c_void) {
 952     // Just unbox...
 953     let mut state: Box<HTTP2State> = unsafe { transmute(state) };
 954     state.free();
 955 }
 956
 957 #[no_mangle]
 958 pub extern "C" fn rs_http2_state_tx_free(state: *mut std::os::raw::c_void, tx_id: u64) {
 959     let state = cast_pointer!(state, HTTP2State);
 960     state.free_tx(tx_id);
 961 }
 962
 963 #[no_mangle]
 964 pub extern "C" fn rs_http2_parse_ts(
 965     flow: *const Flow, state: *mut std::os::raw::c_void, _pstate: *mut std::os::raw::c_void,
 966     input: *const u8, input_len: u32, _data: *const std::os::raw::c_void, _flags: u8,
 967 ) -> AppLayerResult {
 968     let state = cast_pointer!(state, HTTP2State);
 969     let buf = build_slice!(input, input_len as usize);
 970
 971     state.files.flags_ts = unsafe { FileFlowToFlags(flow, STREAM_TOSERVER) };
 972     return state.parse_ts(buf);
 973 }
 974
 975 #[no_mangle]
 976 pub extern "C" fn rs_http2_parse_tc(
 977     flow: *const Flow, state: *mut std::os::raw::c_void, _pstate: *mut std::os::raw::c_void,
 978     input: *const u8, input_len: u32, _data: *const std::os::raw::c_void, _flags: u8,
 979 ) -> AppLayerResult {
 980     let state = cast_pointer!(state, HTTP2State);
 981     let buf = build_slice!(input, input_len as usize);
 982     state.files.flags_tc = unsafe { FileFlowToFlags(flow, STREAM_TOCLIENT) };
 983     return state.parse_tc(buf);
 984 }
 985
 986 #[no_mangle]
 987 pub extern "C" fn rs_http2_state_get_tx(
 988     state: *mut std::os::raw::c_void, tx_id: u64,
 989 ) -> *mut std::os::raw::c_void {
 990     let state = cast_pointer!(state, HTTP2State);
 991     match state.get_tx(tx_id) {
 992         Some(tx) => {
 993             return unsafe { transmute(tx) };
 994         }
 995         None => {
 996             return std::ptr::null_mut();
 997         }
 998     }
 999 }
1000
1001 #[no_mangle]
1002 pub extern "C" fn rs_http2_state_get_tx_count(state: *mut std::os::raw::c_void) -> u64 {
1003     let state = cast_pointer!(state, HTTP2State);
1004     return state.tx_id;
1005 }
1006
1007 #[no_mangle]
1008 pub extern "C" fn rs_http2_state_progress_completion_status(_direction: u8) -> std::os::raw::c_int {
1009     return HTTP2TransactionState::HTTP2StateClosed as i32;
1010 }
1011
1012 #[no_mangle]
1013 pub extern "C" fn rs_http2_tx_get_state(tx: *mut std::os::raw::c_void) -> HTTP2TransactionState {
1014     let tx = cast_pointer!(tx, HTTP2Transaction);
1015     return tx.state;
1016 }
1017
1018 #[no_mangle]
1019 pub extern "C" fn rs_http2_tx_get_alstate_progress(
1020     tx: *mut std::os::raw::c_void, _direction: u8,
1021 ) -> std::os::raw::c_int {
1022     return rs_http2_tx_get_state(tx) as i32;
1023 }
1024
1025 #[no_mangle]
1026 pub extern "C" fn rs_http2_state_get_events(
1027     tx: *mut std::os::raw::c_void,
1028 ) -> *mut core::AppLayerDecoderEvents {
1029     let tx = cast_pointer!(tx, HTTP2Transaction);
1030     return tx.events;
1031 }
1032
1033 #[no_mangle]
1034 pub extern "C" fn rs_http2_state_get_event_info(
1035     event_name: *const std::os::raw::c_char, event_id: *mut std::os::raw::c_int,
1036     event_type: *mut core::AppLayerEventType,
1037 ) -> std::os::raw::c_int {
1038     if event_name == std::ptr::null() {
1039         return -1;
1040     }
1041     let c_event_name: &CStr = unsafe { CStr::from_ptr(event_name) };
1042     let event = match c_event_name.to_str() {
1043         Ok(s) => {
1044             match s {
1045                 "invalid_frame_header" => HTTP2Event::InvalidFrameHeader as i32,
1046                 "invalid_client_magic" => HTTP2Event::InvalidClientMagic as i32,
1047                 "invalid_frame_data" => HTTP2Event::InvalidFrameData as i32,
1048                 "invalid_header" => HTTP2Event::InvalidHeader as i32,
1049                 "invalid_frame_length" => HTTP2Event::InvalidFrameLength as i32,
1050                 "extra_header_data" => HTTP2Event::ExtraHeaderData as i32,
1051                 "long_frame_data" => HTTP2Event::LongFrameData as i32,
1052                 "stream_id_reuse" => HTTP2Event::StreamIdReuse as i32,
1053                 "invalid_http1_settings" => HTTP2Event::InvalidHTTP1Settings as i32,
1054                 _ => -1, // unknown event
1055             }
1056         }
1057         Err(_) => -1, // UTF-8 conversion failed
1058     };
1059     unsafe {
1060         *event_type = core::APP_LAYER_EVENT_TYPE_TRANSACTION;
1061         *event_id = event as std::os::raw::c_int;
1062     };
1063     0
1064 }
1065
1066 #[no_mangle]
1067 pub extern "C" fn rs_http2_state_get_event_info_by_id(
1068     event_id: std::os::raw::c_int, event_name: *mut *const std::os::raw::c_char,
1069     event_type: *mut core::AppLayerEventType,
1070 ) -> i8 {
1071     if let Some(e) = HTTP2Event::from_i32(event_id as i32) {
1072         let estr = match e {
1073             HTTP2Event::InvalidFrameHeader => "invalid_frame_header\0",
1074             HTTP2Event::InvalidClientMagic => "invalid_client_magic\0",
1075             HTTP2Event::InvalidFrameData => "invalid_frame_data\0",
1076             HTTP2Event::InvalidHeader => "invalid_header\0",
1077             HTTP2Event::InvalidFrameLength => "invalid_frame_length\0",
1078             HTTP2Event::ExtraHeaderData => "extra_header_data\0",
1079             HTTP2Event::LongFrameData => "long_frame_data\0",
1080             HTTP2Event::StreamIdReuse => "stream_id_reuse\0",
1081             HTTP2Event::InvalidHTTP1Settings => "invalid_http1_settings\0",
1082         };
1083         unsafe {
1084             *event_name = estr.as_ptr() as *const std::os::raw::c_char;
1085             *event_type = core::APP_LAYER_EVENT_TYPE_TRANSACTION;
1086         };
1087         0
1088     } else {
1089         -1
1090     }
1091 }
1092 #[no_mangle]
1093 pub extern "C" fn rs_http2_state_get_tx_iterator(
1094     _ipproto: u8, _alproto: AppProto, state: *mut std::os::raw::c_void, min_tx_id: u64,
1095     _max_tx_id: u64, istate: &mut u64,
1096 ) -> applayer::AppLayerGetTxIterTuple {
1097     let state = cast_pointer!(state, HTTP2State);
1098     match state.tx_iterator(min_tx_id, istate) {
1099         Some((tx, out_tx_id, has_next)) => {
1100             let c_tx = unsafe { transmute(tx) };
1101             let ires = applayer::AppLayerGetTxIterTuple::with_values(c_tx, out_tx_id, has_next);
1102             return ires;
1103         }
1104         None => {
1105             return applayer::AppLayerGetTxIterTuple::not_found();
1106         }
1107     }
1108 }
1109
1110 #[no_mangle]
1111 pub extern "C" fn rs_http2_getfiles(
1112     state: *mut std::os::raw::c_void, direction: u8,
1113 ) -> *mut FileContainer {
1114     let state = cast_pointer!(state, HTTP2State);
1115     if direction == STREAM_TOCLIENT {
1116         &mut state.files.files_tc as *mut FileContainer
1117     } else {
1118         &mut state.files.files_ts as *mut FileContainer
1119     }
1120 }
1121
1122 // Parser name as a C style string.
1123 const PARSER_NAME: &'static [u8] = b"http2\0";
1124
1125 #[no_mangle]
1126 pub unsafe extern "C" fn rs_http2_register_parser() {
1127     let default_port = CString::new("[80]").unwrap();
1128     let parser = RustParser {
1129         name: PARSER_NAME.as_ptr() as *const std::os::raw::c_char,
1130         default_port: default_port.as_ptr(),
1131         ipproto: IPPROTO_TCP,
1132         probe_ts: None, // big magic string should be enough
1133         probe_tc: Some(rs_http2_probing_parser_tc),
1134         min_depth: HTTP2_FRAME_HEADER_LEN as u16,
1135         max_depth: HTTP2_MAGIC_LEN as u16,
1136         state_new: rs_http2_state_new,
1137         state_free: rs_http2_state_free,
1138         tx_free: rs_http2_state_tx_free,
1139         parse_ts: rs_http2_parse_ts,
1140         parse_tc: rs_http2_parse_tc,
1141         get_tx_count: rs_http2_state_get_tx_count,
1142         get_tx: rs_http2_state_get_tx,
1143         tx_get_comp_st: rs_http2_state_progress_completion_status,
1144         tx_get_progress: rs_http2_tx_get_alstate_progress,
1145         get_de_state: rs_http2_tx_get_detect_state,
1146         set_de_state: rs_http2_tx_set_detect_state,
1147         get_events: Some(rs_http2_state_get_events),
1148         get_eventinfo: Some(rs_http2_state_get_event_info),
1149         get_eventinfo_byid: Some(rs_http2_state_get_event_info_by_id),
1150         localstorage_new: None,
1151         localstorage_free: None,
1152         get_files: Some(rs_http2_getfiles),
1153         get_tx_iterator: Some(rs_http2_state_get_tx_iterator),
1154         get_tx_data: rs_http2_get_tx_data,
1155         apply_tx_config: None,
1156         flags: 0,
1157         truncate: None,
1158     };
1159
1160     let ip_proto_str = CString::new("tcp").unwrap();
1161
1162     if AppLayerProtoDetectConfProtoDetectionEnabled(ip_proto_str.as_ptr(), parser.name) != 0 {
1163         let alproto = AppLayerRegisterProtocolDetection(&parser, 1);
1164         ALPROTO_HTTP2 = alproto;
1165         if AppLayerParserConfParserEnabled(ip_proto_str.as_ptr(), parser.name) != 0 {
1166             let _ = AppLayerRegisterParser(&parser, alproto);
1167         }
1168         SCLogDebug!("Rust http2 parser registered.");
1169     } else {
1170         SCLogNotice!("Protocol detector and parser disabled for HTTP2.");
1171     }
1172 }