| /* Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #include <assert.h> |
| #include <stddef.h> |
| |
| #include <apr_strings.h> |
| |
| #include <httpd.h> |
| #include <http_core.h> |
| #include <http_connection.h> |
| #include <http_log.h> |
| |
| #include <nghttp2/nghttp2.h> |
| |
| #include "h2_private.h" |
| #include "h2.h" |
| #include "h2_bucket_beam.h" |
| #include "h2_conn.h" |
| #include "h2_config.h" |
| #include "h2_h2.h" |
| #include "h2_mplx.h" |
| #include "h2_push.h" |
| #include "h2_request.h" |
| #include "h2_headers.h" |
| #include "h2_session.h" |
| #include "h2_stream.h" |
| #include "h2_task.h" |
| #include "h2_ctx.h" |
| #include "h2_task.h" |
| #include "h2_util.h" |
| |
| |
| static const char *h2_ss_str(h2_stream_state_t state) |
| { |
| switch (state) { |
| case H2_SS_IDLE: |
| return "IDLE"; |
| case H2_SS_RSVD_L: |
| return "RESERVED_LOCAL"; |
| case H2_SS_RSVD_R: |
| return "RESERVED_REMOTE"; |
| case H2_SS_OPEN: |
| return "OPEN"; |
| case H2_SS_CLOSED_L: |
| return "HALF_CLOSED_LOCAL"; |
| case H2_SS_CLOSED_R: |
| return "HALF_CLOSED_REMOTE"; |
| case H2_SS_CLOSED: |
| return "CLOSED"; |
| case H2_SS_CLEANUP: |
| return "CLEANUP"; |
| default: |
| return "UNKNOWN"; |
| } |
| } |
| |
| const char *h2_stream_state_str(h2_stream *stream) |
| { |
| return h2_ss_str(stream->state); |
| } |
| |
| /* Abbreviations for stream transit tables */ |
| #define S_XXX (-2) /* Programming Error */ |
| #define S_ERR (-1) /* Protocol Error */ |
| #define S_NOP (0) /* No Change */ |
| #define S_IDL (H2_SS_IDL + 1) |
| #define S_RS_L (H2_SS_RSVD_L + 1) |
| #define S_RS_R (H2_SS_RSVD_R + 1) |
| #define S_OPEN (H2_SS_OPEN + 1) |
| #define S_CL_L (H2_SS_CLOSED_L + 1) |
| #define S_CL_R (H2_SS_CLOSED_R + 1) |
| #define S_CLS (H2_SS_CLOSED + 1) |
| #define S_CLN (H2_SS_CLEANUP + 1) |
| |
| /* state transisitions when certain frame types are sent */ |
| static int trans_on_send[][H2_SS_MAX] = { |
| /*S_IDLE,S_RS_R, S_RS_L, S_OPEN, S_CL_R, S_CL_L, S_CLS, S_CLN, */ |
| { S_ERR, S_ERR, S_ERR, S_NOP, S_NOP, S_ERR, S_NOP, S_NOP, },/* DATA */ |
| { S_ERR, S_ERR, S_CL_R, S_NOP, S_NOP, S_ERR, S_NOP, S_NOP, },/* HEADERS */ |
| { S_NOP, S_NOP, S_NOP, S_NOP, S_NOP, S_NOP, S_NOP, S_NOP, },/* PRIORITY */ |
| { S_CLS, S_CLS, S_CLS, S_CLS, S_CLS, S_CLS, S_NOP, S_NOP, },/* RST_STREAM */ |
| { S_ERR, S_ERR, S_ERR, S_ERR, S_ERR, S_ERR, S_ERR, S_ERR, },/* SETTINGS */ |
| { S_RS_L,S_ERR, S_ERR, S_ERR, S_ERR, S_ERR, S_ERR, S_ERR, },/* PUSH_PROMISE */ |
| { S_ERR, S_ERR, S_ERR, S_ERR, S_ERR, S_ERR, S_ERR, S_ERR, },/* PING */ |
| { S_ERR, S_ERR, S_ERR, S_ERR, S_ERR, S_ERR, S_ERR, S_ERR, },/* GOAWAY */ |
| { S_NOP, S_NOP, S_NOP, S_NOP, S_NOP, S_NOP, S_NOP, S_NOP, },/* WINDOW_UPDATE */ |
| { S_NOP, S_NOP, S_NOP, S_NOP, S_NOP, S_NOP, S_NOP, S_NOP, },/* CONT */ |
| }; |
| /* state transisitions when certain frame types are received */ |
| static int trans_on_recv[][H2_SS_MAX] = { |
| /*S_IDLE,S_RS_R, S_RS_L, S_OPEN, S_CL_R, S_CL_L, S_CLS, S_CLN, */ |
| { S_ERR, S_ERR, S_ERR, S_NOP, S_ERR, S_NOP, S_NOP, S_NOP, },/* DATA */ |
| { S_OPEN,S_CL_L, S_ERR, S_NOP, S_ERR, S_NOP, S_NOP, S_NOP, },/* HEADERS */ |
| { S_NOP, S_NOP, S_NOP, S_NOP, S_NOP, S_NOP, S_NOP, S_NOP, },/* PRIORITY */ |
| { S_ERR, S_CLS, S_CLS, S_CLS, S_CLS, S_CLS, S_NOP, S_NOP, },/* RST_STREAM */ |
| { S_ERR, S_ERR, S_ERR, S_ERR, S_ERR, S_ERR, S_ERR, S_ERR, },/* SETTINGS */ |
| { S_RS_R,S_ERR, S_ERR, S_ERR, S_ERR, S_ERR, S_ERR, S_ERR, },/* PUSH_PROMISE */ |
| { S_ERR, S_ERR, S_ERR, S_ERR, S_ERR, S_ERR, S_ERR, S_ERR, },/* PING */ |
| { S_ERR, S_ERR, S_ERR, S_ERR, S_ERR, S_ERR, S_ERR, S_ERR, },/* GOAWAY */ |
| { S_NOP, S_NOP, S_NOP, S_NOP, S_NOP, S_NOP, S_NOP, S_NOP, },/* WINDOW_UPDATE */ |
| { S_NOP, S_NOP, S_NOP, S_NOP, S_NOP, S_NOP, S_NOP, S_NOP, },/* CONT */ |
| }; |
| /* state transisitions when certain events happen */ |
| static int trans_on_event[][H2_SS_MAX] = { |
| /*S_IDLE,S_RS_R, S_RS_L, S_OPEN, S_CL_R, S_CL_L, S_CLS, S_CLN, */ |
| { S_XXX, S_ERR, S_ERR, S_CL_L, S_CLS, S_XXX, S_XXX, S_XXX, },/* EV_CLOSED_L*/ |
| { S_ERR, S_ERR, S_ERR, S_CL_R, S_ERR, S_CLS, S_NOP, S_NOP, },/* EV_CLOSED_R*/ |
| { S_CLS, S_CLS, S_CLS, S_CLS, S_CLS, S_CLS, S_NOP, S_NOP, },/* EV_CANCELLED*/ |
| { S_NOP, S_XXX, S_XXX, S_XXX, S_XXX, S_CLS, S_CLN, S_XXX, },/* EV_EOS_SENT*/ |
| }; |
| |
| static int on_map(h2_stream_state_t state, int map[H2_SS_MAX]) |
| { |
| int op = map[state]; |
| switch (op) { |
| case S_XXX: |
| case S_ERR: |
| return op; |
| case S_NOP: |
| return state; |
| default: |
| return op-1; |
| } |
| } |
| |
| static int on_frame(h2_stream_state_t state, int frame_type, |
| int frame_map[][H2_SS_MAX], apr_size_t maxlen) |
| { |
| ap_assert(frame_type >= 0); |
| ap_assert(state >= 0); |
| if (frame_type >= maxlen) { |
| return state; /* NOP, ignore unknown frame types */ |
| } |
| return on_map(state, frame_map[frame_type]); |
| } |
| |
| static int on_frame_send(h2_stream_state_t state, int frame_type) |
| { |
| return on_frame(state, frame_type, trans_on_send, H2_ALEN(trans_on_send)); |
| } |
| |
| static int on_frame_recv(h2_stream_state_t state, int frame_type) |
| { |
| return on_frame(state, frame_type, trans_on_recv, H2_ALEN(trans_on_recv)); |
| } |
| |
| static int on_event(h2_stream* stream, h2_stream_event_t ev) |
| { |
| if (stream->monitor && stream->monitor->on_event) { |
| stream->monitor->on_event(stream->monitor->ctx, stream, ev); |
| } |
| if (ev < H2_ALEN(trans_on_event)) { |
| return on_map(stream->state, trans_on_event[ev]); |
| } |
| return stream->state; |
| } |
| |
| static void H2_STREAM_OUT_LOG(int lvl, h2_stream *s, const char *tag) |
| { |
| if (APLOG_C_IS_LEVEL(s->session->c, lvl)) { |
| conn_rec *c = s->session->c; |
| char buffer[4 * 1024]; |
| apr_size_t len, bmax = sizeof(buffer)/sizeof(buffer[0]); |
| |
| len = h2_util_bb_print(buffer, bmax, tag, "", s->out_buffer); |
| ap_log_cerror(APLOG_MARK, lvl, 0, c, |
| H2_STRM_MSG(s, "out-buffer(%s)"), len? buffer : "empty"); |
| } |
| } |
| |
| static apr_status_t setup_input(h2_stream *stream) { |
| if (stream->input == NULL) { |
| int empty = (stream->input_eof |
| && (!stream->in_buffer |
| || APR_BRIGADE_EMPTY(stream->in_buffer))); |
| if (!empty) { |
| h2_beam_create(&stream->input, stream->pool, stream->id, |
| "input", H2_BEAM_OWNER_SEND, 0, |
| stream->session->s->timeout); |
| h2_beam_send_from(stream->input, stream->pool); |
| } |
| } |
| return APR_SUCCESS; |
| } |
| |
| static apr_status_t close_input(h2_stream *stream) |
| { |
| conn_rec *c = stream->session->c; |
| apr_status_t status = APR_SUCCESS; |
| |
| stream->input_eof = 1; |
| if (stream->input && h2_beam_is_closed(stream->input)) { |
| return APR_SUCCESS; |
| } |
| |
| ap_log_cerror(APLOG_MARK, APLOG_TRACE1, 0, stream->session->c, |
| H2_STRM_MSG(stream, "closing input")); |
| if (stream->rst_error) { |
| return APR_ECONNRESET; |
| } |
| |
| if (stream->trailers && !apr_is_empty_table(stream->trailers)) { |
| apr_bucket *b; |
| h2_headers *r; |
| |
| if (!stream->in_buffer) { |
| stream->in_buffer = apr_brigade_create(stream->pool, c->bucket_alloc); |
| } |
| |
| r = h2_headers_create(HTTP_OK, stream->trailers, NULL, |
| stream->in_trailer_octets, stream->pool); |
| stream->trailers = NULL; |
| b = h2_bucket_headers_create(c->bucket_alloc, r); |
| APR_BRIGADE_INSERT_TAIL(stream->in_buffer, b); |
| |
| b = apr_bucket_eos_create(c->bucket_alloc); |
| APR_BRIGADE_INSERT_TAIL(stream->in_buffer, b); |
| |
| ap_log_cerror(APLOG_MARK, APLOG_TRACE2, 0, stream->session->c, |
| H2_STRM_MSG(stream, "added trailers")); |
| h2_stream_dispatch(stream, H2_SEV_IN_DATA_PENDING); |
| } |
| if (stream->input) { |
| h2_stream_flush_input(stream); |
| return h2_beam_close(stream->input); |
| } |
| return status; |
| } |
| |
| static apr_status_t close_output(h2_stream *stream) |
| { |
| if (!stream->output || h2_beam_is_closed(stream->output)) { |
| return APR_SUCCESS; |
| } |
| ap_log_cerror(APLOG_MARK, APLOG_TRACE1, 0, stream->session->c, |
| H2_STRM_MSG(stream, "closing output")); |
| return h2_beam_leave(stream->output); |
| } |
| |
| static void on_state_enter(h2_stream *stream) |
| { |
| if (stream->monitor && stream->monitor->on_state_enter) { |
| stream->monitor->on_state_enter(stream->monitor->ctx, stream); |
| } |
| } |
| |
| static void on_state_event(h2_stream *stream, h2_stream_event_t ev) |
| { |
| if (stream->monitor && stream->monitor->on_state_event) { |
| stream->monitor->on_state_event(stream->monitor->ctx, stream, ev); |
| } |
| } |
| |
| static void on_state_invalid(h2_stream *stream) |
| { |
| if (stream->monitor && stream->monitor->on_state_invalid) { |
| stream->monitor->on_state_invalid(stream->monitor->ctx, stream); |
| } |
| /* stream got an event/frame invalid in its state */ |
| ap_log_cerror(APLOG_MARK, APLOG_TRACE1, 0, stream->session->c, |
| H2_STRM_MSG(stream, "invalid state event")); |
| switch (stream->state) { |
| case H2_SS_OPEN: |
| case H2_SS_RSVD_L: |
| case H2_SS_RSVD_R: |
| case H2_SS_CLOSED_L: |
| case H2_SS_CLOSED_R: |
| h2_stream_rst(stream, H2_ERR_INTERNAL_ERROR); |
| break; |
| default: |
| break; |
| } |
| } |
| |
| static apr_status_t transit(h2_stream *stream, int new_state) |
| { |
| if (new_state == stream->state) { |
| return APR_SUCCESS; |
| } |
| else if (new_state < 0) { |
| ap_log_cerror(APLOG_MARK, APLOG_WARNING, 0, stream->session->c, |
| H2_STRM_LOG(APLOGNO(03081), stream, "invalid transition")); |
| on_state_invalid(stream); |
| return APR_EINVAL; |
| } |
| |
| ap_log_cerror(APLOG_MARK, APLOG_TRACE1, 0, stream->session->c, |
| H2_STRM_MSG(stream, "transit to [%s]"), h2_ss_str(new_state)); |
| stream->state = new_state; |
| switch (new_state) { |
| case H2_SS_IDLE: |
| break; |
| case H2_SS_RSVD_L: |
| close_input(stream); |
| break; |
| case H2_SS_RSVD_R: |
| break; |
| case H2_SS_OPEN: |
| break; |
| case H2_SS_CLOSED_L: |
| close_output(stream); |
| break; |
| case H2_SS_CLOSED_R: |
| close_input(stream); |
| break; |
| case H2_SS_CLOSED: |
| close_input(stream); |
| close_output(stream); |
| if (stream->out_buffer) { |
| apr_brigade_cleanup(stream->out_buffer); |
| } |
| break; |
| case H2_SS_CLEANUP: |
| break; |
| } |
| on_state_enter(stream); |
| return APR_SUCCESS; |
| } |
| |
| void h2_stream_set_monitor(h2_stream *stream, h2_stream_monitor *monitor) |
| { |
| stream->monitor = monitor; |
| } |
| |
| void h2_stream_dispatch(h2_stream *stream, h2_stream_event_t ev) |
| { |
| int new_state; |
| |
| ap_log_cerror(APLOG_MARK, APLOG_TRACE2, 0, stream->session->c, |
| H2_STRM_MSG(stream, "dispatch event %d"), ev); |
| new_state = on_event(stream, ev); |
| if (new_state < 0) { |
| ap_log_cerror(APLOG_MARK, APLOG_WARNING, 0, stream->session->c, |
| H2_STRM_LOG(APLOGNO(10002), stream, "invalid event %d"), ev); |
| on_state_invalid(stream); |
| AP_DEBUG_ASSERT(new_state > S_XXX); |
| return; |
| } |
| else if (new_state == stream->state) { |
| /* nop */ |
| ap_log_cerror(APLOG_MARK, APLOG_TRACE2, 0, stream->session->c, |
| H2_STRM_MSG(stream, "non-state event %d"), ev); |
| return; |
| } |
| else { |
| on_state_event(stream, ev); |
| transit(stream, new_state); |
| } |
| } |
| |
| static void set_policy_for(h2_stream *stream, h2_request *r) |
| { |
| int enabled = h2_session_push_enabled(stream->session); |
| stream->push_policy = h2_push_policy_determine(r->headers, stream->pool, enabled); |
| r->serialize = h2_config_sgeti(stream->session->s, H2_CONF_SER_HEADERS); |
| } |
| |
| apr_status_t h2_stream_send_frame(h2_stream *stream, int ftype, int flags, size_t frame_len) |
| { |
| apr_status_t status = APR_SUCCESS; |
| int new_state, eos = 0; |
| |
| new_state = on_frame_send(stream->state, ftype); |
| if (new_state < 0) { |
| ap_log_cerror(APLOG_MARK, APLOG_TRACE1, 0, stream->session->c, |
| H2_STRM_MSG(stream, "invalid frame %d send"), ftype); |
| AP_DEBUG_ASSERT(new_state > S_XXX); |
| return transit(stream, new_state); |
| } |
| |
| ++stream->out_frames; |
| stream->out_frame_octets += frame_len; |
| switch (ftype) { |
| case NGHTTP2_DATA: |
| eos = (flags & NGHTTP2_FLAG_END_STREAM); |
| break; |
| |
| case NGHTTP2_HEADERS: |
| eos = (flags & NGHTTP2_FLAG_END_STREAM); |
| break; |
| |
| case NGHTTP2_PUSH_PROMISE: |
| /* start pushed stream */ |
| ap_assert(stream->request == NULL); |
| ap_assert(stream->rtmp != NULL); |
| status = h2_stream_end_headers(stream, 1, 0); |
| if (status != APR_SUCCESS) goto leave; |
| break; |
| |
| default: |
| break; |
| } |
| ap_log_cerror(APLOG_MARK, APLOG_TRACE1, 0, stream->session->c, |
| H2_STRM_MSG(stream, "send frame %d, eos=%d"), ftype, eos); |
| status = transit(stream, new_state); |
| if (status == APR_SUCCESS && eos) { |
| status = transit(stream, on_event(stream, H2_SEV_CLOSED_L)); |
| } |
| leave: |
| return status; |
| } |
| |
| apr_status_t h2_stream_recv_frame(h2_stream *stream, int ftype, int flags, size_t frame_len) |
| { |
| apr_status_t status = APR_SUCCESS; |
| int new_state, eos = 0; |
| |
| new_state = on_frame_recv(stream->state, ftype); |
| if (new_state < 0) { |
| ap_log_cerror(APLOG_MARK, APLOG_TRACE1, 0, stream->session->c, |
| H2_STRM_MSG(stream, "invalid frame %d recv"), ftype); |
| AP_DEBUG_ASSERT(new_state > S_XXX); |
| return transit(stream, new_state); |
| } |
| |
| switch (ftype) { |
| case NGHTTP2_DATA: |
| eos = (flags & NGHTTP2_FLAG_END_STREAM); |
| break; |
| |
| case NGHTTP2_HEADERS: |
| eos = (flags & NGHTTP2_FLAG_END_STREAM); |
| if (stream->state == H2_SS_OPEN) { |
| /* trailer HEADER */ |
| if (!eos) { |
| h2_stream_rst(stream, H2_ERR_PROTOCOL_ERROR); |
| } |
| stream->in_trailer_octets += frame_len; |
| } |
| else { |
| /* request HEADER */ |
| ap_assert(stream->request == NULL); |
| if (stream->rtmp == NULL) { |
| /* This can only happen, if the stream has received no header |
| * name/value pairs at all. The lastest nghttp2 version have become |
| * pretty good at detecting this early. In any case, we have |
| * to abort the connection here, since this is clearly a protocol error */ |
| return APR_EINVAL; |
| } |
| status = h2_stream_end_headers(stream, eos, frame_len); |
| if (status != APR_SUCCESS) goto leave; |
| } |
| break; |
| |
| default: |
| break; |
| } |
| status = transit(stream, new_state); |
| if (status == APR_SUCCESS && eos) { |
| status = transit(stream, on_event(stream, H2_SEV_CLOSED_R)); |
| } |
| leave: |
| return status; |
| } |
| |
| apr_status_t h2_stream_flush_input(h2_stream *stream) |
| { |
| apr_status_t status = APR_SUCCESS; |
| |
| if (stream->in_buffer && !APR_BRIGADE_EMPTY(stream->in_buffer)) { |
| setup_input(stream); |
| status = h2_beam_send(stream->input, stream->in_buffer, APR_BLOCK_READ); |
| stream->in_last_write = apr_time_now(); |
| } |
| if (stream->input_eof |
| && stream->input && !h2_beam_is_closed(stream->input)) { |
| status = h2_beam_close(stream->input); |
| } |
| return status; |
| } |
| |
| apr_status_t h2_stream_recv_DATA(h2_stream *stream, uint8_t flags, |
| const uint8_t *data, size_t len) |
| { |
| h2_session *session = stream->session; |
| apr_status_t status = APR_SUCCESS; |
| |
| stream->in_data_frames++; |
| if (len > 0) { |
| if (APLOGctrace3(session->c)) { |
| const char *load = apr_pstrndup(stream->pool, (const char *)data, len); |
| ap_log_cerror(APLOG_MARK, APLOG_TRACE3, 0, session->c, |
| H2_STRM_MSG(stream, "recv DATA, len=%d: -->%s<--"), |
| (int)len, load); |
| } |
| else { |
| ap_log_cerror(APLOG_MARK, APLOG_TRACE2, status, session->c, |
| H2_STRM_MSG(stream, "recv DATA, len=%d"), (int)len); |
| } |
| stream->in_data_octets += len; |
| if (!stream->in_buffer) { |
| stream->in_buffer = apr_brigade_create(stream->pool, |
| session->c->bucket_alloc); |
| } |
| apr_brigade_write(stream->in_buffer, NULL, NULL, (const char *)data, len); |
| h2_stream_dispatch(stream, H2_SEV_IN_DATA_PENDING); |
| } |
| return status; |
| } |
| |
| static void prep_output(h2_stream *stream) { |
| conn_rec *c = stream->session->c; |
| if (!stream->out_buffer) { |
| stream->out_buffer = apr_brigade_create(stream->pool, c->bucket_alloc); |
| } |
| } |
| |
| h2_stream *h2_stream_create(int id, apr_pool_t *pool, h2_session *session, |
| h2_stream_monitor *monitor, int initiated_on) |
| { |
| h2_stream *stream = apr_pcalloc(pool, sizeof(h2_stream)); |
| |
| stream->id = id; |
| stream->initiated_on = initiated_on; |
| stream->created = apr_time_now(); |
| stream->state = H2_SS_IDLE; |
| stream->pool = pool; |
| stream->session = session; |
| stream->monitor = monitor; |
| stream->max_mem = session->max_stream_mem; |
| |
| #ifdef H2_NG2_LOCAL_WIN_SIZE |
| stream->in_window_size = |
| nghttp2_session_get_stream_local_window_size( |
| stream->session->ngh2, stream->id); |
| #endif |
| |
| ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, session->c, |
| H2_STRM_LOG(APLOGNO(03082), stream, "created")); |
| on_state_enter(stream); |
| return stream; |
| } |
| |
| void h2_stream_cleanup(h2_stream *stream) |
| { |
| apr_status_t status; |
| |
| ap_assert(stream); |
| if (stream->out_buffer) { |
| /* remove any left over output buckets that may still have |
| * references into request pools */ |
| apr_brigade_cleanup(stream->out_buffer); |
| } |
| if (stream->input) { |
| h2_beam_abort(stream->input); |
| status = h2_beam_wait_empty(stream->input, APR_NONBLOCK_READ); |
| if (status == APR_EAGAIN) { |
| ap_log_cerror(APLOG_MARK, APLOG_TRACE2, 0, stream->session->c, |
| H2_STRM_MSG(stream, "wait on input drain")); |
| status = h2_beam_wait_empty(stream->input, APR_BLOCK_READ); |
| ap_log_cerror(APLOG_MARK, APLOG_TRACE2, status, stream->session->c, |
| H2_STRM_MSG(stream, "input drain returned")); |
| } |
| } |
| } |
| |
| void h2_stream_destroy(h2_stream *stream) |
| { |
| ap_assert(stream); |
| ap_log_cerror(APLOG_MARK, APLOG_TRACE3, 0, stream->session->c, |
| H2_STRM_MSG(stream, "destroy")); |
| apr_pool_destroy(stream->pool); |
| } |
| |
| apr_status_t h2_stream_prep_processing(h2_stream *stream) |
| { |
| if (stream->request) { |
| const h2_request *r = stream->request; |
| ap_log_cerror(APLOG_MARK, APLOG_TRACE1, 0, stream->session->c, |
| H2_STRM_MSG(stream, "schedule %s %s://%s%s chunked=%d"), |
| r->method, r->scheme, r->authority, r->path, r->chunked); |
| setup_input(stream); |
| stream->scheduled = 1; |
| return APR_SUCCESS; |
| } |
| return APR_EINVAL; |
| } |
| |
| void h2_stream_rst(h2_stream *stream, int error_code) |
| { |
| stream->rst_error = error_code; |
| if (stream->input) { |
| h2_beam_abort(stream->input); |
| } |
| if (stream->output) { |
| h2_beam_leave(stream->output); |
| } |
| ap_log_cerror(APLOG_MARK, APLOG_TRACE1, 0, stream->session->c, |
| H2_STRM_MSG(stream, "reset, error=%d"), error_code); |
| h2_stream_dispatch(stream, H2_SEV_CANCELLED); |
| } |
| |
| apr_status_t h2_stream_set_request_rec(h2_stream *stream, |
| request_rec *r, int eos) |
| { |
| h2_request *req; |
| apr_status_t status; |
| |
| ap_assert(stream->request == NULL); |
| ap_assert(stream->rtmp == NULL); |
| if (stream->rst_error) { |
| return APR_ECONNRESET; |
| } |
| status = h2_request_rcreate(&req, stream->pool, r); |
| if (status == APR_SUCCESS) { |
| ap_log_rerror(APLOG_MARK, APLOG_DEBUG, status, r, |
| H2_STRM_LOG(APLOGNO(03058), stream, |
| "set_request_rec %s host=%s://%s%s"), |
| req->method, req->scheme, req->authority, req->path); |
| stream->rtmp = req; |
| /* simulate the frames that led to this */ |
| return h2_stream_recv_frame(stream, NGHTTP2_HEADERS, |
| NGHTTP2_FLAG_END_STREAM, 0); |
| } |
| return status; |
| } |
| |
| void h2_stream_set_request(h2_stream *stream, const h2_request *r) |
| { |
| ap_assert(stream->request == NULL); |
| ap_assert(stream->rtmp == NULL); |
| stream->rtmp = h2_request_clone(stream->pool, r); |
| } |
| |
| static void set_error_response(h2_stream *stream, int http_status) |
| { |
| if (!h2_stream_is_ready(stream)) { |
| conn_rec *c = stream->session->c; |
| apr_bucket *b; |
| h2_headers *response; |
| |
| response = h2_headers_die(http_status, stream->request, stream->pool); |
| prep_output(stream); |
| b = apr_bucket_eos_create(c->bucket_alloc); |
| APR_BRIGADE_INSERT_HEAD(stream->out_buffer, b); |
| b = h2_bucket_headers_create(c->bucket_alloc, response); |
| APR_BRIGADE_INSERT_HEAD(stream->out_buffer, b); |
| } |
| } |
| |
| static apr_status_t add_trailer(h2_stream *stream, |
| const char *name, size_t nlen, |
| const char *value, size_t vlen) |
| { |
| conn_rec *c = stream->session->c; |
| char *hname, *hvalue; |
| |
| if (nlen == 0 || name[0] == ':') { |
| ap_log_cerror(APLOG_MARK, APLOG_DEBUG, APR_EINVAL, c, |
| H2_STRM_LOG(APLOGNO(03060), stream, |
| "pseudo header in trailer")); |
| return APR_EINVAL; |
| } |
| if (h2_req_ignore_trailer(name, nlen)) { |
| return APR_SUCCESS; |
| } |
| if (!stream->trailers) { |
| stream->trailers = apr_table_make(stream->pool, 5); |
| } |
| hname = apr_pstrndup(stream->pool, name, nlen); |
| hvalue = apr_pstrndup(stream->pool, value, vlen); |
| h2_util_camel_case_header(hname, nlen); |
| apr_table_mergen(stream->trailers, hname, hvalue); |
| ap_log_cerror(APLOG_MARK, APLOG_TRACE2, 0, c, |
| H2_STRM_MSG(stream, "added trailer '%s: %s'"), hname, hvalue); |
| |
| return APR_SUCCESS; |
| } |
| |
| apr_status_t h2_stream_add_header(h2_stream *stream, |
| const char *name, size_t nlen, |
| const char *value, size_t vlen) |
| { |
| h2_session *session = stream->session; |
| int error = 0; |
| apr_status_t status; |
| |
| if (stream->has_response) { |
| return APR_EINVAL; |
| } |
| ++stream->request_headers_added; |
| if (name[0] == ':') { |
| if ((vlen) > session->s->limit_req_line) { |
| /* pseudo header: approximation of request line size check */ |
| ap_log_cerror(APLOG_MARK, APLOG_INFO, 0, session->c, |
| H2_STRM_LOG(APLOGNO(10178), stream, |
| "Request pseudo header exceeds " |
| "LimitRequestFieldSize: %s"), name); |
| error = HTTP_REQUEST_URI_TOO_LARGE; |
| } |
| } |
| else if ((nlen + 2 + vlen) > session->s->limit_req_fieldsize) { |
| /* header too long */ |
| ap_log_cerror(APLOG_MARK, APLOG_INFO, 0, session->c, |
| H2_STRM_LOG(APLOGNO(10180), stream,"Request header exceeds " |
| "LimitRequestFieldSize: %.*s"), |
| (int)H2MIN(nlen, 80), name); |
| error = HTTP_REQUEST_HEADER_FIELDS_TOO_LARGE; |
| } |
| |
| if (stream->request_headers_added > session->s->limit_req_fields + 4) { |
| /* too many header lines, include 4 pseudo headers */ |
| if (stream->request_headers_added |
| > session->s->limit_req_fields + 4 + 100) { |
| /* yeah, right */ |
| h2_stream_rst(stream, H2_ERR_ENHANCE_YOUR_CALM); |
| return APR_ECONNRESET; |
| } |
| ap_log_cerror(APLOG_MARK, APLOG_INFO, 0, session->c, |
| H2_STRM_LOG(APLOGNO(10181), stream, "Number of request headers " |
| "exceeds LimitRequestFields")); |
| error = HTTP_REQUEST_HEADER_FIELDS_TOO_LARGE; |
| } |
| |
| if (error) { |
| set_error_response(stream, error); |
| return APR_EINVAL; |
| } |
| else if (H2_SS_IDLE == stream->state) { |
| if (!stream->rtmp) { |
| stream->rtmp = h2_req_create(stream->id, stream->pool, |
| NULL, NULL, NULL, NULL, NULL, 0); |
| } |
| status = h2_request_add_header(stream->rtmp, stream->pool, |
| name, nlen, value, vlen); |
| } |
| else if (H2_SS_OPEN == stream->state) { |
| status = add_trailer(stream, name, nlen, value, vlen); |
| } |
| else { |
| status = APR_EINVAL; |
| } |
| |
| if (status != APR_SUCCESS) { |
| ap_log_cerror(APLOG_MARK, APLOG_TRACE1, 0, session->c, |
| H2_STRM_MSG(stream, "header %s not accepted"), name); |
| h2_stream_dispatch(stream, H2_SEV_CANCELLED); |
| } |
| return status; |
| } |
| |
| typedef struct { |
| apr_size_t maxlen; |
| const char *failed_key; |
| } val_len_check_ctx; |
| |
| static int table_check_val_len(void *baton, const char *key, const char *value) |
| { |
| val_len_check_ctx *ctx = baton; |
| |
| if (strlen(value) <= ctx->maxlen) return 1; |
| ctx->failed_key = key; |
| return 0; |
| } |
| |
| apr_status_t h2_stream_end_headers(h2_stream *stream, int eos, size_t raw_bytes) |
| { |
| apr_status_t status; |
| val_len_check_ctx ctx; |
| |
| status = h2_request_end_headers(stream->rtmp, stream->pool, eos, raw_bytes); |
| if (APR_SUCCESS == status) { |
| set_policy_for(stream, stream->rtmp); |
| stream->request = stream->rtmp; |
| stream->rtmp = NULL; |
| |
| ctx.maxlen = stream->session->s->limit_req_fieldsize; |
| ctx.failed_key = NULL; |
| apr_table_do(table_check_val_len, &ctx, stream->request->headers, NULL); |
| if (ctx.failed_key) { |
| ap_log_cerror(APLOG_MARK, APLOG_INFO, 0, stream->session->c, |
| H2_STRM_LOG(APLOGNO(), stream,"Request header exceeds " |
| "LimitRequestFieldSize: %.*s"), |
| (int)H2MIN(strlen(ctx.failed_key), 80), ctx.failed_key); |
| set_error_response(stream, HTTP_REQUEST_HEADER_FIELDS_TOO_LARGE); |
| /* keep on returning APR_SUCCESS, so that we send a HTTP response and |
| * do not RST the stream. */ |
| } |
| } |
| return status; |
| } |
| |
| static apr_bucket *get_first_headers_bucket(apr_bucket_brigade *bb) |
| { |
| if (bb) { |
| apr_bucket *b = APR_BRIGADE_FIRST(bb); |
| while (b != APR_BRIGADE_SENTINEL(bb)) { |
| if (H2_BUCKET_IS_HEADERS(b)) { |
| return b; |
| } |
| b = APR_BUCKET_NEXT(b); |
| } |
| } |
| return NULL; |
| } |
| |
| static apr_status_t add_buffered_data(h2_stream *stream, apr_off_t requested, |
| apr_off_t *plen, int *peos, int *is_all, |
| h2_headers **pheaders) |
| { |
| apr_bucket *b, *e; |
| |
| *peos = 0; |
| *plen = 0; |
| *is_all = 0; |
| if (pheaders) { |
| *pheaders = NULL; |
| } |
| |
| H2_STREAM_OUT_LOG(APLOG_TRACE2, stream, "add_buffered_data"); |
| b = APR_BRIGADE_FIRST(stream->out_buffer); |
| while (b != APR_BRIGADE_SENTINEL(stream->out_buffer)) { |
| e = APR_BUCKET_NEXT(b); |
| if (APR_BUCKET_IS_METADATA(b)) { |
| if (APR_BUCKET_IS_FLUSH(b)) { |
| APR_BUCKET_REMOVE(b); |
| apr_bucket_destroy(b); |
| } |
| else if (APR_BUCKET_IS_EOS(b)) { |
| *peos = 1; |
| return APR_SUCCESS; |
| } |
| else if (H2_BUCKET_IS_HEADERS(b)) { |
| if (*plen > 0) { |
| /* data before the response, can only return up to here */ |
| return APR_SUCCESS; |
| } |
| else if (pheaders) { |
| *pheaders = h2_bucket_headers_get(b); |
| APR_BUCKET_REMOVE(b); |
| apr_bucket_destroy(b); |
| ap_log_cerror(APLOG_MARK, APLOG_TRACE1, 0, stream->session->c, |
| H2_STRM_MSG(stream, "prep, -> response %d"), |
| (*pheaders)->status); |
| return APR_SUCCESS; |
| } |
| else { |
| return APR_EAGAIN; |
| } |
| } |
| } |
| else if (b->length == 0) { |
| APR_BUCKET_REMOVE(b); |
| apr_bucket_destroy(b); |
| } |
| else { |
| ap_assert(b->length != (apr_size_t)-1); |
| *plen += b->length; |
| if (*plen >= requested) { |
| *plen = requested; |
| return APR_SUCCESS; |
| } |
| } |
| b = e; |
| } |
| *is_all = 1; |
| return APR_SUCCESS; |
| } |
| |
| apr_status_t h2_stream_out_prepare(h2_stream *stream, apr_off_t *plen, |
| int *peos, h2_headers **pheaders) |
| { |
| apr_status_t status = APR_SUCCESS; |
| apr_off_t requested, missing, max_chunk = H2_DATA_CHUNK_SIZE; |
| conn_rec *c; |
| int complete; |
| |
| ap_assert(stream); |
| |
| if (stream->rst_error) { |
| *plen = 0; |
| *peos = 1; |
| return APR_ECONNRESET; |
| } |
| |
| c = stream->session->c; |
| prep_output(stream); |
| |
| /* determine how much we'd like to send. We cannot send more than |
| * is requested. But we can reduce the size in case the master |
| * connection operates in smaller chunks. (TSL warmup) */ |
| if (stream->session->io.write_size > 0) { |
| max_chunk = stream->session->io.write_size - H2_FRAME_HDR_LEN; |
| } |
| requested = (*plen > 0)? H2MIN(*plen, max_chunk) : max_chunk; |
| |
| /* count the buffered data until eos or a headers bucket */ |
| status = add_buffered_data(stream, requested, plen, peos, &complete, pheaders); |
| |
| if (status == APR_EAGAIN) { |
| /* TODO: ugly, someone needs to retrieve the response first */ |
| h2_mplx_keep_active(stream->session->mplx, stream); |
| ap_log_cerror(APLOG_MARK, APLOG_TRACE1, 0, c, |
| H2_STRM_MSG(stream, "prep, response eagain")); |
| return status; |
| } |
| else if (status != APR_SUCCESS) { |
| return status; |
| } |
| |
| if (pheaders && *pheaders) { |
| return APR_SUCCESS; |
| } |
| |
| /* If there we do not have enough buffered data to satisfy the requested |
| * length *and* we counted the _complete_ buffer (and did not stop in the middle |
| * because of meta data there), lets see if we can read more from the |
| * output beam */ |
| missing = H2MIN(requested, stream->max_mem) - *plen; |
| if (complete && !*peos && missing > 0) { |
| apr_status_t rv = APR_EOF; |
| |
| if (stream->output) { |
| H2_STREAM_OUT_LOG(APLOG_TRACE2, stream, "pre"); |
| rv = h2_beam_receive(stream->output, stream->out_buffer, |
| APR_NONBLOCK_READ, stream->max_mem - *plen); |
| H2_STREAM_OUT_LOG(APLOG_TRACE2, stream, "post"); |
| } |
| |
| if (rv == APR_SUCCESS) { |
| /* count the buffer again, now that we have read output */ |
| status = add_buffered_data(stream, requested, plen, peos, &complete, pheaders); |
| } |
| else if (APR_STATUS_IS_EOF(rv)) { |
| apr_bucket *eos = apr_bucket_eos_create(c->bucket_alloc); |
| APR_BRIGADE_INSERT_TAIL(stream->out_buffer, eos); |
| *peos = 1; |
| } |
| else if (APR_STATUS_IS_EAGAIN(rv)) { |
| /* we set this is the status of this call only if there |
| * is no buffered data, see check below */ |
| } |
| else { |
| /* real error reading. Give this back directly, even though |
| * we may have something buffered. */ |
| status = rv; |
| } |
| } |
| |
| if (status == APR_SUCCESS) { |
| if (*peos || *plen) { |
| ap_log_cerror(APLOG_MARK, APLOG_TRACE1, 0, c, |
| H2_STRM_MSG(stream, "prepare, len=%ld eos=%d"), |
| (long)*plen, *peos); |
| } |
| else { |
| status = (stream->output && h2_beam_is_closed(stream->output))? APR_EOF : APR_EAGAIN; |
| ap_log_cerror(APLOG_MARK, APLOG_TRACE1, 0, c, |
| H2_STRM_MSG(stream, "prepare, no data")); |
| } |
| } |
| return status; |
| } |
| |
| static int is_not_headers(apr_bucket *b) |
| { |
| return !H2_BUCKET_IS_HEADERS(b); |
| } |
| |
| apr_status_t h2_stream_read_to(h2_stream *stream, apr_bucket_brigade *bb, |
| apr_off_t *plen, int *peos) |
| { |
| conn_rec *c = stream->session->c; |
| apr_status_t status = APR_SUCCESS; |
| |
| if (stream->rst_error) { |
| return APR_ECONNRESET; |
| } |
| status = h2_append_brigade(bb, stream->out_buffer, plen, peos, is_not_headers); |
| if (status == APR_SUCCESS && !*peos && !*plen) { |
| status = APR_EAGAIN; |
| } |
| ap_log_cerror(APLOG_MARK, APLOG_TRACE2, status, c, |
| H2_STRM_MSG(stream, "read_to, len=%ld eos=%d"), |
| (long)*plen, *peos); |
| return status; |
| } |
| |
| |
| apr_status_t h2_stream_submit_pushes(h2_stream *stream, h2_headers *response) |
| { |
| apr_status_t status = APR_SUCCESS; |
| apr_array_header_t *pushes; |
| int i; |
| |
| pushes = h2_push_collect_update(stream, stream->request, response); |
| if (pushes && !apr_is_empty_array(pushes)) { |
| ap_log_cerror(APLOG_MARK, APLOG_TRACE1, 0, stream->session->c, |
| H2_STRM_MSG(stream, "found %d push candidates"), |
| pushes->nelts); |
| for (i = 0; i < pushes->nelts; ++i) { |
| h2_push *push = APR_ARRAY_IDX(pushes, i, h2_push*); |
| h2_stream *s = h2_session_push(stream->session, stream, push); |
| if (!s) { |
| status = APR_ECONNRESET; |
| break; |
| } |
| } |
| } |
| return status; |
| } |
| |
| apr_table_t *h2_stream_get_trailers(h2_stream *stream) |
| { |
| return NULL; |
| } |
| |
| const h2_priority *h2_stream_get_priority(h2_stream *stream, |
| h2_headers *response) |
| { |
| if (response && stream->initiated_on) { |
| const char *ctype = apr_table_get(response->headers, "content-type"); |
| if (ctype) { |
| /* FIXME: Not good enough, config needs to come from request->server */ |
| return h2_cconfig_get_priority(stream->session->c, ctype); |
| } |
| } |
| return NULL; |
| } |
| |
| int h2_stream_is_ready(h2_stream *stream) |
| { |
| if (stream->has_response) { |
| return 1; |
| } |
| else if (stream->out_buffer && get_first_headers_bucket(stream->out_buffer)) { |
| return 1; |
| } |
| return 0; |
| } |
| |
| int h2_stream_was_closed(const h2_stream *stream) |
| { |
| switch (stream->state) { |
| case H2_SS_CLOSED: |
| case H2_SS_CLEANUP: |
| return 1; |
| default: |
| return 0; |
| } |
| } |
| |
| apr_status_t h2_stream_in_consumed(h2_stream *stream, apr_off_t amount) |
| { |
| h2_session *session = stream->session; |
| |
| if (amount > 0) { |
| apr_off_t consumed = amount; |
| |
| while (consumed > 0) { |
| int len = (consumed > INT_MAX)? INT_MAX : (int)consumed; |
| nghttp2_session_consume(session->ngh2, stream->id, len); |
| consumed -= len; |
| } |
| |
| #ifdef H2_NG2_LOCAL_WIN_SIZE |
| if (1) { |
| int cur_size = nghttp2_session_get_stream_local_window_size( |
| session->ngh2, stream->id); |
| int win = stream->in_window_size; |
| int thigh = win * 8/10; |
| int tlow = win * 2/10; |
| const int win_max = 2*1024*1024; |
| const int win_min = 32*1024; |
| |
| /* Work in progress, probably should add directives for these |
| * values once this stabilizes somewhat. The general idea is |
| * to adapt stream window sizes if the input window changes |
| * a) very quickly (< good RTT) from full to empty |
| * b) only a little bit (> bad RTT) |
| * where in a) it grows and in b) it shrinks again. |
| */ |
| if (cur_size > thigh && amount > thigh && win < win_max) { |
| /* almost empty again with one reported consumption, how |
| * long did this take? */ |
| long ms = apr_time_msec(apr_time_now() - stream->in_last_write); |
| if (ms < 40) { |
| win = H2MIN(win_max, win + (64*1024)); |
| } |
| } |
| else if (cur_size < tlow && amount < tlow && win > win_min) { |
| /* staying full, for how long already? */ |
| long ms = apr_time_msec(apr_time_now() - stream->in_last_write); |
| if (ms > 700) { |
| win = H2MAX(win_min, win - (32*1024)); |
| } |
| } |
| |
| if (win != stream->in_window_size) { |
| stream->in_window_size = win; |
| nghttp2_session_set_local_window_size(session->ngh2, |
| NGHTTP2_FLAG_NONE, stream->id, win); |
| } |
| ap_log_cerror(APLOG_MARK, APLOG_TRACE2, 0, session->c, |
| "h2_stream(%ld-%d): consumed %ld bytes, window now %d/%d", |
| session->id, stream->id, (long)amount, |
| cur_size, stream->in_window_size); |
| } |
| #endif |
| } |
| return APR_SUCCESS; |
| } |
| |