deps: update llhttp to 9.1.2

PR-URL: nodejs#48981
Reviewed-By: Robert Nagy <ronagy@icloud.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Rafael Gonzaga <rafael.nunu@hotmail.com>
Reviewed-By: Marco Ippolito <marcoippolito54@gmail.com>

deps/llhttp/.gitignore

@@ -0,0 +1 @@
+libllhttp.pc

deps/llhttp/CMakeLists.txt

@@ -1,7 +1,7 @@
 cmake_minimum_required(VERSION 3.5.1)
 cmake_policy(SET CMP0069 NEW)
 
-project(llhttp VERSION 8.1.1)
+project(llhttp VERSION 9.1.2)
 include(GNUInstallDirs)
 
 set(CMAKE_C_STANDARD 99)
@@ -47,8 +47,9 @@ configure_file(
 function(config_library target)
   target_sources(${target} PRIVATE ${LLHTTP_SOURCES} ${LLHTTP_HEADERS})
 
-  target_include_directories(${target} PRIVATE
-      ${CMAKE_CURRENT_SOURCE_DIR}/include
+  target_include_directories(${target} PUBLIC
+    $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
+    $<INSTALL_INTERFACE:include>
   )
 
   set_target_properties(${target} PROPERTIES
@@ -72,9 +73,10 @@ function(config_library target)
 
   # This is required to work with FetchContent
   install(EXPORT llhttp
-        FILE llhttp-config.cmake
-        NAMESPACE llhttp::
-        DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/llhttp)
+    FILE llhttp-config.cmake
+    NAMESPACE llhttp::
+    DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/llhttp
+  )
 endfunction(config_library target)
 
 if(BUILD_SHARED_LIBS)

deps/llhttp/README.md

@@ -61,33 +61,41 @@ checks could be performed to get even stricter verification of the llhttp.
 ## Usage
 
 ```C
+#include "stdio.h"
 #include "llhttp.h"
+#include "string.h"
 
-llhttp_t parser;
-llhttp_settings_t settings;
+int handle_on_message_complete(llhttp_t* parser) {
+	fprintf(stdout, "Message completed!\n");
+	return 0;
+}
+
+int main() {
+	llhttp_t parser;
+	llhttp_settings_t settings;
 
-/* Initialize user callbacks and settings */
-llhttp_settings_init(&settings);
+	/*Initialize user callbacks and settings */
+	llhttp_settings_init(&settings);
 
-/* Set user callback */
-settings.on_message_complete = handle_on_message_complete;
+	/*Set user callback */
+	settings.on_message_complete = handle_on_message_complete;
 
-/* Initialize the parser in HTTP_BOTH mode, meaning that it will select between
- * HTTP_REQUEST and HTTP_RESPONSE parsing automatically while reading the first
- * input.
- */
-llhttp_init(&parser, HTTP_BOTH, &settings);
+	/*Initialize the parser in HTTP_BOTH mode, meaning that it will select between
+	*HTTP_REQUEST and HTTP_RESPONSE parsing automatically while reading the first
+	*input.
+	*/
+	llhttp_init(&parser, HTTP_BOTH, &settings);
 
-/* Parse request! */
-const char* request = "GET / HTTP/1.1\r\n\r\n";
-int request_len = strlen(request);
+	/*Parse request! */
+	const char* request = "GET / HTTP/1.1\r\n\r\n";
+	int request_len = strlen(request);
 
-enum llhttp_errno err = llhttp_execute(&parser, request, request_len);
-if (err == HPE_OK) {
-  /* Successfully parsed! */
-} else {
-  fprintf(stderr, "Parse error: %s %s\n", llhttp_errno_name(err),
-          parser.reason);
+	enum llhttp_errno err = llhttp_execute(&parser, request, request_len);
+	if (err == HPE_OK) {
+		fprintf(stdout, "Successfully parsed!\n");
+	} else {
+		fprintf(stderr, "Parse error: %s %s\n", llhttp_errno_name(err), parser.reason);
+	}
 }
 ```
 For more information on API usage, please refer to [src/native/api.h](https://github.com/nodejs/llhttp/blob/main/src/native/api.h).
@@ -279,7 +287,7 @@ protocol support to highly non-compliant clients/server.
 No `HPE_INVALID_HEADER_TOKEN` will be raised for incorrect header values when
 lenient parsing is "on".
 
-**USE AT YOUR OWN RISK!**
+**Enabling this flag can pose a security issue since you will be exposed to request smuggling attacks. USE WITH CAUTION!**
 
 ### `void llhttp_set_lenient_chunked_length(llhttp_t* parser, int enabled)`
 
@@ -292,23 +300,22 @@ conjunction with `Content-Length`.
 This error is important to prevent HTTP request smuggling, but may be less desirable
 for small number of cases involving legacy servers.
 
-**USE AT YOUR OWN RISK!**
+**Enabling this flag can pose a security issue since you will be exposed to request smuggling attacks. USE WITH CAUTION!**
 
 ### `void llhttp_set_lenient_keep_alive(llhttp_t* parser, int enabled)`
 
 Enables/disables lenient handling of `Connection: close` and HTTP/1.0
 requests responses.
 
-Normally `llhttp` would error on (in strict mode) or discard (in loose mode)
-the HTTP request/response after the request/response with `Connection: close`
-and `Content-Length`. 
+Normally `llhttp` would error the HTTP request/response 
+after the request/response with `Connection: close` and `Content-Length`. 
 
 This is important to prevent cache poisoning attacks,
 but might interact badly with outdated and insecure clients. 
 
 With this flag the extra request/response will be parsed normally.
 
-**USE AT YOUR OWN RISK!**
+**Enabling this flag can pose a security issue since you will be exposed to poisoning attacks. USE WITH CAUTION!**
 
 ### `void llhttp_set_lenient_transfer_encoding(llhttp_t* parser, int enabled)`
 
@@ -323,7 +330,67 @@ avoid request smuggling.
 
 With this flag the extra value will be parsed normally.
 
-**USE AT YOUR OWN RISK!**
+**Enabling this flag can pose a security issue since you will be exposed to request smuggling attacks. USE WITH CAUTION!**
+
+### `void llhttp_set_lenient_version(llhttp_t* parser, int enabled)`
+
+Enables/disables lenient handling of HTTP version.
+
+Normally `llhttp` would error when the HTTP version in the request or status line
+is not `0.9`, `1.0`, `1.1` or `2.0`.
+With this flag the extra value will be parsed normally.
+
+**Enabling this flag can pose a security issue since you will allow unsupported HTTP versions. USE WITH CAUTION!**
+
+### `void llhttp_set_lenient_data_after_close(llhttp_t* parser, int enabled)`
+
+Enables/disables lenient handling of additional data received after a message ends
+and keep-alive is disabled.
+
+Normally `llhttp` would error when additional unexpected data is received if the message
+contains the `Connection` header with `close` value.
+With this flag the extra data will discarded without throwing an error.
+
+**Enabling this flag can pose a security issue since you will be exposed to poisoning attacks. USE WITH CAUTION!**
+
+### `void llhttp_set_lenient_optional_lf_after_cr(llhttp_t* parser, int enabled)`
+
+Enables/disables lenient handling of incomplete CRLF sequences.
+
+Normally `llhttp` would error when a CR is not followed by LF when terminating the
+request line, the status line, the headers or a chunk header.
+With this flag only a CR is required to terminate such sections.
+
+**Enabling this flag can pose a security issue since you will be exposed to request smuggling attacks. USE WITH CAUTION!**
+
+### `void llhttp_set_lenient_optional_cr_before_lf(llhttp_t* parser, int enabled)`
+
+Enables/disables lenient handling of line separators.
+
+Normally `llhttp` would error when a LF is not preceded by CR when terminating the
+request line, the status line, the headers, a chunk header or a chunk data.
+With this flag only a LF is required to terminate such sections.
+
+**Enabling this flag can pose a security issue since you will be exposed to request smuggling attacks. USE WITH CAUTION!**
+
+### `void llhttp_set_lenient_optional_crlf_after_chunk(llhttp_t* parser, int enabled)`
+
+Enables/disables lenient handling of chunks not separated via CRLF.
+
+Normally `llhttp` would error when after a chunk data a CRLF is missing before
+starting a new chunk.
+With this flag the new chunk can start immediately after the previous one.
+
+**Enabling this flag can pose a security issue since you will be exposed to request smuggling attacks. USE WITH CAUTION!**
+
+### `void llhttp_set_lenient_spaces_after_chunk_size(llhttp_t* parser, int enabled)`
+
+Enables/disables lenient handling of spaces after chunk size.
+
+Normally `llhttp` would error when after a chunk size is followed by one or more spaces are present instead of a CRLF or `;`.
+With this flag this check is disabled.
+
+**Enabling this flag can pose a security issue since you will be exposed to request smuggling attacks. USE WITH CAUTION!**
 
 ## Build Instructions
 
@@ -345,17 +412,34 @@ make
 
 ### Using with CMake
 
-If you want to use this library in a CMake project you can use the snippet below.
+If you want to use this library in a CMake project as a shared library, you can use the snippet below.
 
 ```
 FetchContent_Declare(llhttp
-  URL "https://github.com/nodejs/llhttp/archive/refs/tags/v6.0.5.tar.gz")  # Using version 6.0.5
+  URL "https://github.com/nodejs/llhttp/archive/refs/tags/release/v8.1.0.tar.gz")
 
 FetchContent_MakeAvailable(llhttp)
 
-target_link_libraries(${EXAMPLE_PROJECT_NAME} ${PROJECT_LIBRARIES} llhttp ${PROJECT_NAME})
+# Link with the llhttp_shared target
+target_link_libraries(${EXAMPLE_PROJECT_NAME} ${PROJECT_LIBRARIES} llhttp_shared ${PROJECT_NAME})
 ```
 
+If you want to use this library in a CMake project as a static library, you can set some cache variables first.
+
+```
+FetchContent_Declare(llhttp
+  URL "https://github.com/nodejs/llhttp/archive/refs/tags/release/v8.1.0.tar.gz")
+
+set(BUILD_SHARED_LIBS OFF CACHE INTERNAL "")
+set(BUILD_STATIC_LIBS ON CACHE INTERNAL "")
+FetchContent_MakeAvailable(llhttp)
+
+# Link with the llhttp_static target
+target_link_libraries(${EXAMPLE_PROJECT_NAME} ${PROJECT_LIBRARIES} llhttp_static ${PROJECT_NAME})
+```
+
+_Note that using the git repo directly (e.g., via a git repo url and tag) will not work with FetchContent_Declare because [CMakeLists.txt](./CMakeLists.txt) requires string replacements (e.g., `_RELEASE_`) before it will build._
+
 ## Building on Windows
 
 ### Installation