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c66d4fc74e
mod_http2: only when 'HttpProtocolOptions Unsafe' is configured, will
control characters in response headers or trailers be forwarded to the
client. Otherwise, in the default configuration, a request will eiher
fail with status 500 or the stream will be reset by a RST_STREAM frame.
git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1791377 13f79535-47bb-0310-9956-ffa450edef68
161 lines
5.1 KiB
C
161 lines
5.1 KiB
C
/* Copyright 2015 greenbytes GmbH (https://www.greenbytes.de)
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef __mod_h2__h2__
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#define __mod_h2__h2__
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/**
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* The magic PRIamble of RFC 7540 that is always sent when starting
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* a h2 communication.
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*/
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extern const char *H2_MAGIC_TOKEN;
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#define H2_ERR_NO_ERROR (0x00)
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#define H2_ERR_PROTOCOL_ERROR (0x01)
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#define H2_ERR_INTERNAL_ERROR (0x02)
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#define H2_ERR_FLOW_CONTROL_ERROR (0x03)
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#define H2_ERR_SETTINGS_TIMEOUT (0x04)
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#define H2_ERR_STREAM_CLOSED (0x05)
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#define H2_ERR_FRAME_SIZE_ERROR (0x06)
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#define H2_ERR_REFUSED_STREAM (0x07)
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#define H2_ERR_CANCEL (0x08)
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#define H2_ERR_COMPRESSION_ERROR (0x09)
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#define H2_ERR_CONNECT_ERROR (0x0a)
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#define H2_ERR_ENHANCE_YOUR_CALM (0x0b)
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#define H2_ERR_INADEQUATE_SECURITY (0x0c)
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#define H2_ERR_HTTP_1_1_REQUIRED (0x0d)
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#define H2_HEADER_METHOD ":method"
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#define H2_HEADER_METHOD_LEN 7
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#define H2_HEADER_SCHEME ":scheme"
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#define H2_HEADER_SCHEME_LEN 7
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#define H2_HEADER_AUTH ":authority"
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#define H2_HEADER_AUTH_LEN 10
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#define H2_HEADER_PATH ":path"
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#define H2_HEADER_PATH_LEN 5
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#define H2_CRLF "\r\n"
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/* Max data size to write so it fits inside a TLS record */
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#define H2_DATA_CHUNK_SIZE ((16*1024) - 100 - 9)
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/* Maximum number of padding bytes in a frame, rfc7540 */
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#define H2_MAX_PADLEN 256
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/* Initial default window size, RFC 7540 ch. 6.5.2 */
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#define H2_INITIAL_WINDOW_SIZE ((64*1024)-1)
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#define H2_STREAM_CLIENT_INITIATED(id) (id&0x01)
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#define H2_ALEN(a) (sizeof(a)/sizeof((a)[0]))
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#define H2MAX(x,y) ((x) > (y) ? (x) : (y))
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#define H2MIN(x,y) ((x) < (y) ? (x) : (y))
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typedef enum {
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H2_DEPENDANT_AFTER,
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H2_DEPENDANT_INTERLEAVED,
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H2_DEPENDANT_BEFORE,
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} h2_dependency;
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typedef struct h2_priority {
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h2_dependency dependency;
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int weight;
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} h2_priority;
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typedef enum {
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H2_PUSH_NONE,
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H2_PUSH_DEFAULT,
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H2_PUSH_HEAD,
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H2_PUSH_FAST_LOAD,
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} h2_push_policy;
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typedef enum {
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H2_SESSION_ST_INIT, /* send initial SETTINGS, etc. */
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H2_SESSION_ST_DONE, /* finished, connection close */
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H2_SESSION_ST_IDLE, /* nothing to write, expecting data inc */
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H2_SESSION_ST_BUSY, /* read/write without stop */
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H2_SESSION_ST_WAIT, /* waiting for tasks reporting back */
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H2_SESSION_ST_CLEANUP, /* pool is being cleaned up */
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} h2_session_state;
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typedef struct h2_session_props {
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int accepted_max; /* the highest remote stream id was/will be handled */
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int completed_max; /* the highest remote stream completed */
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int emitted_count; /* the number of local streams sent */
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int emitted_max; /* the highest local stream id sent */
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int error; /* the last session error encountered */
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unsigned int accepting : 1; /* if the session is accepting new streams */
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unsigned int shutdown : 1; /* if the final GOAWAY has been sent */
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} h2_session_props;
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typedef enum h2_stream_state_t {
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H2_SS_IDLE,
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H2_SS_RSVD_R,
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H2_SS_RSVD_L,
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H2_SS_OPEN,
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H2_SS_CLOSED_R,
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H2_SS_CLOSED_L,
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H2_SS_CLOSED,
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H2_SS_CLEANUP,
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H2_SS_MAX
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} h2_stream_state_t;
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typedef enum {
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H2_SEV_CLOSED_L,
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H2_SEV_CLOSED_R,
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H2_SEV_CANCELLED,
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H2_SEV_EOS_SENT,
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H2_SEV_IN_DATA_PENDING,
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} h2_stream_event_t;
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/* h2_request is the transformer of HTTP2 streams into HTTP/1.1 internal
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* format that will be fed to various httpd input filters to finally
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* become a request_rec to be handled by soemone.
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*/
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typedef struct h2_request h2_request;
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struct h2_request {
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const char *method; /* pseudo header values, see ch. 8.1.2.3 */
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const char *scheme;
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const char *authority;
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const char *path;
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apr_table_t *headers;
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apr_time_t request_time;
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unsigned int chunked : 1; /* iff requst body needs to be forwarded as chunked */
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unsigned int serialize : 1; /* iff this request is written in HTTP/1.1 serialization */
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};
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typedef struct h2_headers h2_headers;
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struct h2_headers {
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int status;
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apr_table_t *headers;
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apr_table_t *notes;
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};
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typedef apr_status_t h2_io_data_cb(void *ctx, const char *data, apr_off_t len);
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typedef int h2_stream_pri_cmp(int stream_id1, int stream_id2, void *ctx);
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/* Note key to attach connection task id to conn_rec/request_rec instances */
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#define H2_TASK_ID_NOTE "http2-task-id"
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#define H2_FILTER_DEBUG_NOTE "http2-debug"
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#define H2_HDR_CONFORMANCE "http2-hdr-conformance"
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#define H2_HDR_CONFORMANCE_UNSAFE "unsafe"
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#endif /* defined(__mod_h2__h2__) */
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