Mercurial > hg > nginx-quic
view src/event/quic/ngx_event_quic_streams.c @ 8512:bb5152ed045b quic
QUIC: added support for segmentation offloading.
To improve output performance, UDP segmentation offloading is used
if available. If there is a significant amount of data in an output
queue and path is verified, QUIC packets are not sent one-by-one,
but instead are collected in a buffer, which is then passed to kernel
in a single sendmsg call, using UDP GSO. Such method greatly decreases
number of system calls and thus system load.
author | Vladimir Homutov <vl@nginx.com> |
---|---|
date | Thu, 15 Jul 2021 14:22:00 +0300 |
parents | 4715f3e669f1 |
children | 4009f120cad4 |
line wrap: on
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/* * Copyright (C) Nginx, Inc. */ #include <ngx_config.h> #include <ngx_core.h> #include <ngx_event.h> #include <ngx_event_quic_connection.h> #define NGX_QUIC_STREAM_GONE (void *) -1 static ngx_quic_stream_t *ngx_quic_create_client_stream(ngx_connection_t *c, uint64_t id); static ngx_quic_stream_t *ngx_quic_create_stream(ngx_connection_t *c, uint64_t id); static ssize_t ngx_quic_stream_recv(ngx_connection_t *c, u_char *buf, size_t size); static ssize_t ngx_quic_stream_send(ngx_connection_t *c, u_char *buf, size_t size); static ngx_chain_t *ngx_quic_stream_send_chain(ngx_connection_t *c, ngx_chain_t *in, off_t limit); static size_t ngx_quic_max_stream_flow(ngx_connection_t *c); static void ngx_quic_stream_cleanup_handler(void *data); static ngx_int_t ngx_quic_control_flow(ngx_connection_t *c, uint64_t last); static ngx_int_t ngx_quic_update_flow(ngx_connection_t *c, uint64_t last); ngx_connection_t * ngx_quic_open_stream(ngx_connection_t *c, ngx_uint_t bidi) { uint64_t id; ngx_quic_stream_t *qs, *nqs; ngx_quic_connection_t *qc; qs = c->quic; qc = ngx_quic_get_connection(qs->parent); if (bidi) { if (qc->streams.server_streams_bidi >= qc->streams.server_max_streams_bidi) { ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0, "quic too many server bidi streams:%uL", qc->streams.server_streams_bidi); return NULL; } id = (qc->streams.server_streams_bidi << 2) | NGX_QUIC_STREAM_SERVER_INITIATED; ngx_log_debug3(NGX_LOG_DEBUG_EVENT, c->log, 0, "quic creating server bidi stream" " streams:%uL max:%uL id:0x%xL", qc->streams.server_streams_bidi, qc->streams.server_max_streams_bidi, id); qc->streams.server_streams_bidi++; } else { if (qc->streams.server_streams_uni >= qc->streams.server_max_streams_uni) { ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0, "quic too many server uni streams:%uL", qc->streams.server_streams_uni); return NULL; } id = (qc->streams.server_streams_uni << 2) | NGX_QUIC_STREAM_SERVER_INITIATED | NGX_QUIC_STREAM_UNIDIRECTIONAL; ngx_log_debug3(NGX_LOG_DEBUG_EVENT, c->log, 0, "quic creating server uni stream" " streams:%uL max:%uL id:0x%xL", qc->streams.server_streams_uni, qc->streams.server_max_streams_uni, id); qc->streams.server_streams_uni++; } nqs = ngx_quic_create_stream(qs->parent, id); if (nqs == NULL) { return NULL; } return nqs->connection; } void ngx_quic_rbtree_insert_stream(ngx_rbtree_node_t *temp, ngx_rbtree_node_t *node, ngx_rbtree_node_t *sentinel) { ngx_rbtree_node_t **p; ngx_quic_stream_t *qn, *qnt; for ( ;; ) { qn = (ngx_quic_stream_t *) node; qnt = (ngx_quic_stream_t *) temp; p = (qn->id < qnt->id) ? &temp->left : &temp->right; if (*p == sentinel) { break; } temp = *p; } *p = node; node->parent = temp; node->left = sentinel; node->right = sentinel; ngx_rbt_red(node); } ngx_quic_stream_t * ngx_quic_find_stream(ngx_rbtree_t *rbtree, uint64_t id) { ngx_rbtree_node_t *node, *sentinel; ngx_quic_stream_t *qn; node = rbtree->root; sentinel = rbtree->sentinel; while (node != sentinel) { qn = (ngx_quic_stream_t *) node; if (id == qn->id) { return qn; } node = (id < qn->id) ? node->left : node->right; } return NULL; } ngx_int_t ngx_quic_close_streams(ngx_connection_t *c, ngx_quic_connection_t *qc) { ngx_event_t *rev, *wev; ngx_rbtree_t *tree; ngx_rbtree_node_t *node; ngx_quic_stream_t *qs; #if (NGX_DEBUG) ngx_uint_t ns; #endif tree = &qc->streams.tree; if (tree->root == tree->sentinel) { return NGX_OK; } #if (NGX_DEBUG) ns = 0; #endif for (node = ngx_rbtree_min(tree->root, tree->sentinel); node; node = ngx_rbtree_next(tree, node)) { qs = (ngx_quic_stream_t *) node; rev = qs->connection->read; rev->error = 1; rev->ready = 1; wev = qs->connection->write; wev->error = 1; wev->ready = 1; ngx_post_event(rev, &ngx_posted_events); if (rev->timer_set) { ngx_del_timer(rev); } #if (NGX_DEBUG) ns++; #endif } ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0, "quic connection has %ui active streams", ns); return NGX_AGAIN; } ngx_int_t ngx_quic_reset_stream(ngx_connection_t *c, ngx_uint_t err) { ngx_event_t *wev; ngx_connection_t *pc; ngx_quic_frame_t *frame; ngx_quic_stream_t *qs; ngx_quic_connection_t *qc; qs = c->quic; pc = qs->parent; qc = ngx_quic_get_connection(pc); frame = ngx_quic_alloc_frame(pc); if (frame == NULL) { return NGX_ERROR; } frame->level = ssl_encryption_application; frame->type = NGX_QUIC_FT_RESET_STREAM; frame->u.reset_stream.id = qs->id; frame->u.reset_stream.error_code = err; frame->u.reset_stream.final_size = c->sent; ngx_quic_queue_frame(qc, frame); wev = c->write; wev->error = 1; wev->ready = 1; return NGX_OK; } static ngx_quic_stream_t * ngx_quic_create_client_stream(ngx_connection_t *c, uint64_t id) { uint64_t min_id; ngx_quic_stream_t *qs; ngx_quic_connection_t *qc; ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0, "quic stream id:0x%xL is new", id); qc = ngx_quic_get_connection(c); if (qc->shutdown) { return NGX_QUIC_STREAM_GONE; } if (id & NGX_QUIC_STREAM_UNIDIRECTIONAL) { if (id & NGX_QUIC_STREAM_SERVER_INITIATED) { if ((id >> 2) < qc->streams.server_streams_uni) { return NGX_QUIC_STREAM_GONE; } qc->error = NGX_QUIC_ERR_STREAM_STATE_ERROR; return NULL; } if ((id >> 2) < qc->streams.client_streams_uni) { return NGX_QUIC_STREAM_GONE; } if ((id >> 2) >= qc->streams.client_max_streams_uni) { qc->error = NGX_QUIC_ERR_STREAM_LIMIT_ERROR; return NULL; } min_id = (qc->streams.client_streams_uni << 2) | NGX_QUIC_STREAM_UNIDIRECTIONAL; qc->streams.client_streams_uni = (id >> 2) + 1; } else { if (id & NGX_QUIC_STREAM_SERVER_INITIATED) { if ((id >> 2) < qc->streams.server_streams_bidi) { return NGX_QUIC_STREAM_GONE; } qc->error = NGX_QUIC_ERR_STREAM_STATE_ERROR; return NULL; } if ((id >> 2) < qc->streams.client_streams_bidi) { return NGX_QUIC_STREAM_GONE; } if ((id >> 2) >= qc->streams.client_max_streams_bidi) { qc->error = NGX_QUIC_ERR_STREAM_LIMIT_ERROR; return NULL; } min_id = (qc->streams.client_streams_bidi << 2); qc->streams.client_streams_bidi = (id >> 2) + 1; } /* * RFC 9000, 2.1. Stream Types and Identifiers * * successive streams of each type are created with numerically increasing * stream IDs. A stream ID that is used out of order results in all * streams of that type with lower-numbered stream IDs also being opened. */ for ( /* void */ ; min_id < id; min_id += 0x04) { qs = ngx_quic_create_stream(c, min_id); if (qs == NULL) { return NULL; } qs->connection->listening->handler(qs->connection); if (qc->shutdown) { return NGX_QUIC_STREAM_GONE; } } return ngx_quic_create_stream(c, id); } static ngx_quic_stream_t * ngx_quic_create_stream(ngx_connection_t *c, uint64_t id) { ngx_log_t *log; ngx_pool_t *pool; ngx_connection_t *sc; ngx_quic_stream_t *qs; ngx_pool_cleanup_t *cln; ngx_quic_connection_t *qc; ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0, "quic stream id:0x%xL create", id); qc = ngx_quic_get_connection(c); pool = ngx_create_pool(NGX_DEFAULT_POOL_SIZE, c->log); if (pool == NULL) { return NULL; } qs = ngx_pcalloc(pool, sizeof(ngx_quic_stream_t)); if (qs == NULL) { ngx_destroy_pool(pool); return NULL; } qs->node.key = id; qs->parent = c; qs->id = id; qs->final_size = (uint64_t) -1; log = ngx_palloc(pool, sizeof(ngx_log_t)); if (log == NULL) { ngx_destroy_pool(pool); return NULL; } *log = *c->log; pool->log = log; sc = ngx_get_connection(-1, log); if (sc == NULL) { ngx_destroy_pool(pool); return NULL; } qs->connection = sc; sc->quic = qs; sc->type = SOCK_STREAM; sc->pool = pool; sc->ssl = c->ssl; sc->sockaddr = c->sockaddr; sc->listening = c->listening; sc->addr_text = c->addr_text; sc->local_sockaddr = c->local_sockaddr; sc->local_socklen = c->local_socklen; sc->number = ngx_atomic_fetch_add(ngx_connection_counter, 1); sc->recv = ngx_quic_stream_recv; sc->send = ngx_quic_stream_send; sc->send_chain = ngx_quic_stream_send_chain; sc->read->log = log; sc->write->log = log; log->connection = sc->number; if ((id & NGX_QUIC_STREAM_UNIDIRECTIONAL) == 0 || (id & NGX_QUIC_STREAM_SERVER_INITIATED)) { sc->write->ready = 1; } if (id & NGX_QUIC_STREAM_UNIDIRECTIONAL) { if (id & NGX_QUIC_STREAM_SERVER_INITIATED) { qs->send_max_data = qc->ctp.initial_max_stream_data_uni; } else { qs->recv_max_data = qc->tp.initial_max_stream_data_uni; } } else { if (id & NGX_QUIC_STREAM_SERVER_INITIATED) { qs->send_max_data = qc->ctp.initial_max_stream_data_bidi_remote; qs->recv_max_data = qc->tp.initial_max_stream_data_bidi_local; } else { qs->send_max_data = qc->ctp.initial_max_stream_data_bidi_local; qs->recv_max_data = qc->tp.initial_max_stream_data_bidi_remote; } } qs->recv_window = qs->recv_max_data; cln = ngx_pool_cleanup_add(pool, 0); if (cln == NULL) { ngx_close_connection(sc); ngx_destroy_pool(pool); return NULL; } cln->handler = ngx_quic_stream_cleanup_handler; cln->data = sc; ngx_rbtree_insert(&qc->streams.tree, &qs->node); return qs; } static ssize_t ngx_quic_stream_recv(ngx_connection_t *c, u_char *buf, size_t size) { ssize_t len, n; ngx_buf_t *b; ngx_chain_t *cl, **ll; ngx_event_t *rev; ngx_connection_t *pc; ngx_quic_stream_t *qs; qs = c->quic; pc = qs->parent; rev = c->read; if (rev->error) { return NGX_ERROR; } ngx_log_debug3(NGX_LOG_DEBUG_EVENT, c->log, 0, "quic stream id:0x%xL recv eof:%d buf:%uz", qs->id, rev->pending_eof, size); if (qs->in == NULL || qs->in->buf->sync) { rev->ready = 0; if (qs->recv_offset == qs->final_size) { rev->eof = 1; return 0; } ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0, "quic stream id:0x%xL recv() not ready", qs->id); return NGX_AGAIN; } len = 0; cl = qs->in; for (ll = &cl; *ll; ll = &(*ll)->next) { b = (*ll)->buf; if (b->sync) { /* hole */ break; } n = ngx_min(b->last - b->pos, (ssize_t) size); buf = ngx_cpymem(buf, b->pos, n); len += n; size -= n; b->pos += n; if (b->pos != b->last) { break; } } qs->in = *ll; *ll = NULL; ngx_quic_free_bufs(pc, cl); if (qs->in == NULL) { rev->ready = rev->pending_eof; } ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0, "quic stream id:0x%xL recv len:%z", qs->id, len); if (ngx_quic_update_flow(c, qs->recv_offset + len) != NGX_OK) { return NGX_ERROR; } return len; } static ssize_t ngx_quic_stream_send(ngx_connection_t *c, u_char *buf, size_t size) { ngx_buf_t b; ngx_chain_t cl; ngx_memzero(&b, sizeof(ngx_buf_t)); b.memory = 1; b.pos = buf; b.last = buf + size; cl.buf = &b; cl.next = NULL; if (ngx_quic_stream_send_chain(c, &cl, 0) == NGX_CHAIN_ERROR) { return NGX_ERROR; } if (b.pos == buf) { return NGX_AGAIN; } return b.pos - buf; } static ngx_chain_t * ngx_quic_stream_send_chain(ngx_connection_t *c, ngx_chain_t *in, off_t limit) { size_t n, flow; ngx_event_t *wev; ngx_chain_t *cl; ngx_connection_t *pc; ngx_quic_frame_t *frame; ngx_quic_stream_t *qs; ngx_quic_connection_t *qc; qs = c->quic; pc = qs->parent; qc = ngx_quic_get_connection(pc); wev = c->write; if (wev->error) { return NGX_CHAIN_ERROR; } flow = ngx_quic_max_stream_flow(c); if (flow == 0) { wev->ready = 0; return in; } n = (limit && (size_t) limit < flow) ? (size_t) limit : flow; frame = ngx_quic_alloc_frame(pc); if (frame == NULL) { return NGX_CHAIN_ERROR; } frame->data = ngx_quic_copy_chain(pc, in, n); if (frame->data == NGX_CHAIN_ERROR) { return NGX_CHAIN_ERROR; } for (n = 0, cl = frame->data; cl; cl = cl->next) { n += ngx_buf_size(cl->buf); } while (in && ngx_buf_size(in->buf) == 0) { in = in->next; } frame->level = ssl_encryption_application; frame->type = NGX_QUIC_FT_STREAM6; /* OFF=1 LEN=1 FIN=0 */ frame->u.stream.off = 1; frame->u.stream.len = 1; frame->u.stream.fin = 0; frame->u.stream.type = frame->type; frame->u.stream.stream_id = qs->id; frame->u.stream.offset = c->sent; frame->u.stream.length = n; c->sent += n; qc->streams.sent += n; ngx_quic_queue_frame(qc, frame); wev->ready = (n < flow) ? 1 : 0; ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0, "quic send_chain sent:%uz", n); return in; } static size_t ngx_quic_max_stream_flow(ngx_connection_t *c) { size_t size; uint64_t sent, unacked; ngx_quic_stream_t *qs; ngx_quic_connection_t *qc; qs = c->quic; qc = ngx_quic_get_connection(qs->parent); size = NGX_QUIC_STREAM_BUFSIZE; sent = c->sent; unacked = sent - qs->acked; if (qc->streams.send_max_data == 0) { qc->streams.send_max_data = qc->ctp.initial_max_data; } if (unacked >= NGX_QUIC_STREAM_BUFSIZE) { ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, 0, "quic send flow hit buffer size"); return 0; } if (unacked + size > NGX_QUIC_STREAM_BUFSIZE) { size = NGX_QUIC_STREAM_BUFSIZE - unacked; } if (qc->streams.sent >= qc->streams.send_max_data) { ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, 0, "quic send flow hit MAX_DATA"); return 0; } if (qc->streams.sent + size > qc->streams.send_max_data) { size = qc->streams.send_max_data - qc->streams.sent; } if (sent >= qs->send_max_data) { ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, 0, "quic send flow hit MAX_STREAM_DATA"); return 0; } if (sent + size > qs->send_max_data) { size = qs->send_max_data - sent; } ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0, "quic send flow:%uz", size); return size; } static void ngx_quic_stream_cleanup_handler(void *data) { ngx_connection_t *c = data; ngx_connection_t *pc; ngx_quic_frame_t *frame; ngx_quic_stream_t *qs; ngx_quic_connection_t *qc; qs = c->quic; pc = qs->parent; qc = ngx_quic_get_connection(pc); ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0, "quic stream id:0x%xL cleanup", qs->id); ngx_rbtree_delete(&qc->streams.tree, &qs->node); ngx_quic_free_bufs(pc, qs->in); if (qc->closing) { /* schedule handler call to continue ngx_quic_close_connection() */ ngx_post_event(pc->read, &ngx_posted_events); return; } if (qc->error) { goto done; } c->read->pending_eof = 1; (void) ngx_quic_update_flow(c, qs->recv_last); if ((qs->id & NGX_QUIC_STREAM_SERVER_INITIATED) == 0 || (qs->id & NGX_QUIC_STREAM_UNIDIRECTIONAL) == 0) { if (!c->read->pending_eof && !c->read->error) { frame = ngx_quic_alloc_frame(pc); if (frame == NULL) { goto done; } frame->level = ssl_encryption_application; frame->type = NGX_QUIC_FT_STOP_SENDING; frame->u.stop_sending.id = qs->id; frame->u.stop_sending.error_code = 0x100; /* HTTP/3 no error */ ngx_quic_queue_frame(qc, frame); } } if ((qs->id & NGX_QUIC_STREAM_SERVER_INITIATED) == 0) { frame = ngx_quic_alloc_frame(pc); if (frame == NULL) { goto done; } frame->level = ssl_encryption_application; frame->type = NGX_QUIC_FT_MAX_STREAMS; if (qs->id & NGX_QUIC_STREAM_UNIDIRECTIONAL) { frame->u.max_streams.limit = ++qc->streams.client_max_streams_uni; frame->u.max_streams.bidi = 0; } else { frame->u.max_streams.limit = ++qc->streams.client_max_streams_bidi; frame->u.max_streams.bidi = 1; } ngx_quic_queue_frame(qc, frame); if (qs->id & NGX_QUIC_STREAM_UNIDIRECTIONAL) { /* do not send fin for client unidirectional streams */ goto done; } } if (c->write->error) { goto done; } ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0, "quic stream id:0x%xL send fin", qs->id); frame = ngx_quic_alloc_frame(pc); if (frame == NULL) { goto done; } frame->level = ssl_encryption_application; frame->type = NGX_QUIC_FT_STREAM7; /* OFF=1 LEN=1 FIN=1 */ frame->u.stream.off = 1; frame->u.stream.len = 1; frame->u.stream.fin = 1; frame->u.stream.type = frame->type; frame->u.stream.stream_id = qs->id; frame->u.stream.offset = c->sent; frame->u.stream.length = 0; ngx_quic_queue_frame(qc, frame); done: (void) ngx_quic_output(pc); if (qc->shutdown) { ngx_quic_shutdown_quic(pc); } } ngx_int_t ngx_quic_handle_stream_frame(ngx_connection_t *c, ngx_quic_header_t *pkt, ngx_quic_frame_t *frame) { uint64_t last; ngx_pool_t *pool; ngx_event_t *rev; ngx_connection_t *sc; ngx_quic_stream_t *qs; ngx_quic_connection_t *qc; ngx_quic_stream_frame_t *f; qc = ngx_quic_get_connection(c); f = &frame->u.stream; if ((f->stream_id & NGX_QUIC_STREAM_UNIDIRECTIONAL) && (f->stream_id & NGX_QUIC_STREAM_SERVER_INITIATED)) { qc->error = NGX_QUIC_ERR_STREAM_STATE_ERROR; return NGX_ERROR; } /* no overflow since both values are 62-bit */ last = f->offset + f->length; qs = ngx_quic_find_stream(&qc->streams.tree, f->stream_id); if (qs == NULL) { qs = ngx_quic_create_client_stream(c, f->stream_id); if (qs == NULL) { return NGX_ERROR; } if (qs == NGX_QUIC_STREAM_GONE) { return NGX_OK; } sc = qs->connection; if (ngx_quic_control_flow(sc, last) != NGX_OK) { goto cleanup; } if (f->fin) { sc->read->pending_eof = 1; qs->final_size = last; } if (f->offset == 0) { sc->read->ready = 1; } if (ngx_quic_order_bufs(c, &qs->in, frame->data, f->offset) != NGX_OK) { goto cleanup; } sc->listening->handler(sc); return NGX_OK; } sc = qs->connection; rev = sc->read; if (rev->error) { return NGX_OK; } if (ngx_quic_control_flow(sc, last) != NGX_OK) { return NGX_ERROR; } if (qs->final_size != (uint64_t) -1 && last > qs->final_size) { qc->error = NGX_QUIC_ERR_FINAL_SIZE_ERROR; return NGX_ERROR; } if (last <= qs->recv_offset) { return NGX_OK; } if (f->offset < qs->recv_offset) { ngx_quic_trim_bufs(frame->data, qs->recv_offset - f->offset); f->offset = qs->recv_offset; } if (f->fin) { if (qs->final_size != (uint64_t) -1 && qs->final_size != last) { qc->error = NGX_QUIC_ERR_FINAL_SIZE_ERROR; return NGX_ERROR; } if (qs->recv_last > last) { qc->error = NGX_QUIC_ERR_FINAL_SIZE_ERROR; return NGX_ERROR; } rev->pending_eof = 1; qs->final_size = last; } if (ngx_quic_order_bufs(c, &qs->in, frame->data, f->offset - qs->recv_offset) != NGX_OK) { return NGX_ERROR; } if (f->offset == qs->recv_offset) { rev->ready = 1; if (rev->active) { rev->handler(rev); } } return NGX_OK; cleanup: pool = sc->pool; ngx_close_connection(sc); ngx_destroy_pool(pool); return NGX_ERROR; } ngx_int_t ngx_quic_handle_max_data_frame(ngx_connection_t *c, ngx_quic_max_data_frame_t *f) { ngx_event_t *wev; ngx_rbtree_t *tree; ngx_rbtree_node_t *node; ngx_quic_stream_t *qs; ngx_quic_connection_t *qc; qc = ngx_quic_get_connection(c); tree = &qc->streams.tree; if (f->max_data <= qc->streams.send_max_data) { return NGX_OK; } if (qc->streams.sent >= qc->streams.send_max_data) { for (node = ngx_rbtree_min(tree->root, tree->sentinel); node; node = ngx_rbtree_next(tree, node)) { qs = (ngx_quic_stream_t *) node; wev = qs->connection->write; if (wev->active) { wev->ready = 1; ngx_post_event(wev, &ngx_posted_events); } } } qc->streams.send_max_data = f->max_data; return NGX_OK; } ngx_int_t ngx_quic_handle_streams_blocked_frame(ngx_connection_t *c, ngx_quic_header_t *pkt, ngx_quic_streams_blocked_frame_t *f) { return NGX_OK; } ngx_int_t ngx_quic_handle_stream_data_blocked_frame(ngx_connection_t *c, ngx_quic_header_t *pkt, ngx_quic_stream_data_blocked_frame_t *f) { uint64_t limit; ngx_quic_frame_t *frame; ngx_quic_stream_t *qs; ngx_quic_connection_t *qc; qc = ngx_quic_get_connection(c); if ((f->id & NGX_QUIC_STREAM_UNIDIRECTIONAL) && (f->id & NGX_QUIC_STREAM_SERVER_INITIATED)) { qc->error = NGX_QUIC_ERR_STREAM_STATE_ERROR; return NGX_ERROR; } qs = ngx_quic_find_stream(&qc->streams.tree, f->id); if (qs == NULL) { qs = ngx_quic_create_client_stream(c, f->id); if (qs == NULL) { return NGX_ERROR; } if (qs == NGX_QUIC_STREAM_GONE) { return NGX_OK; } limit = qs->recv_max_data; qs->connection->listening->handler(qs->connection); } else { limit = qs->recv_max_data; } frame = ngx_quic_alloc_frame(c); if (frame == NULL) { return NGX_ERROR; } frame->level = pkt->level; frame->type = NGX_QUIC_FT_MAX_STREAM_DATA; frame->u.max_stream_data.id = f->id; frame->u.max_stream_data.limit = limit; ngx_quic_queue_frame(qc, frame); return NGX_OK; } ngx_int_t ngx_quic_handle_max_stream_data_frame(ngx_connection_t *c, ngx_quic_header_t *pkt, ngx_quic_max_stream_data_frame_t *f) { uint64_t sent; ngx_event_t *wev; ngx_quic_stream_t *qs; ngx_quic_connection_t *qc; qc = ngx_quic_get_connection(c); if ((f->id & NGX_QUIC_STREAM_UNIDIRECTIONAL) && (f->id & NGX_QUIC_STREAM_SERVER_INITIATED) == 0) { qc->error = NGX_QUIC_ERR_STREAM_STATE_ERROR; return NGX_ERROR; } qs = ngx_quic_find_stream(&qc->streams.tree, f->id); if (qs == NULL) { qs = ngx_quic_create_client_stream(c, f->id); if (qs == NULL) { return NGX_ERROR; } if (qs == NGX_QUIC_STREAM_GONE) { return NGX_OK; } if (f->limit > qs->send_max_data) { qs->send_max_data = f->limit; } qs->connection->listening->handler(qs->connection); return NGX_OK; } if (f->limit <= qs->send_max_data) { return NGX_OK; } sent = qs->connection->sent; if (sent >= qs->send_max_data) { wev = qs->connection->write; if (wev->active) { wev->ready = 1; ngx_post_event(wev, &ngx_posted_events); } } qs->send_max_data = f->limit; return NGX_OK; } ngx_int_t ngx_quic_handle_reset_stream_frame(ngx_connection_t *c, ngx_quic_header_t *pkt, ngx_quic_reset_stream_frame_t *f) { ngx_pool_t *pool; ngx_event_t *rev; ngx_connection_t *sc; ngx_quic_stream_t *qs; ngx_quic_connection_t *qc; qc = ngx_quic_get_connection(c); if ((f->id & NGX_QUIC_STREAM_UNIDIRECTIONAL) && (f->id & NGX_QUIC_STREAM_SERVER_INITIATED)) { qc->error = NGX_QUIC_ERR_STREAM_STATE_ERROR; return NGX_ERROR; } qs = ngx_quic_find_stream(&qc->streams.tree, f->id); if (qs == NULL) { qs = ngx_quic_create_client_stream(c, f->id); if (qs == NULL) { return NGX_ERROR; } if (qs == NGX_QUIC_STREAM_GONE) { return NGX_OK; } sc = qs->connection; rev = sc->read; rev->error = 1; rev->ready = 1; if (ngx_quic_control_flow(sc, f->final_size) != NGX_OK) { goto cleanup; } qs->final_size = f->final_size; if (ngx_quic_update_flow(sc, qs->final_size) != NGX_OK) { goto cleanup; } sc->listening->handler(sc); return NGX_OK; } sc = qs->connection; rev = sc->read; rev->error = 1; rev->ready = 1; if (ngx_quic_control_flow(sc, f->final_size) != NGX_OK) { return NGX_ERROR; } if (qs->final_size != (uint64_t) -1 && qs->final_size != f->final_size) { qc->error = NGX_QUIC_ERR_FINAL_SIZE_ERROR; return NGX_ERROR; } if (qs->recv_last > f->final_size) { qc->error = NGX_QUIC_ERR_FINAL_SIZE_ERROR; return NGX_ERROR; } qs->final_size = f->final_size; if (ngx_quic_update_flow(sc, qs->final_size) != NGX_OK) { return NGX_ERROR; } if (rev->active) { rev->handler(rev); } return NGX_OK; cleanup: pool = sc->pool; ngx_close_connection(sc); ngx_destroy_pool(pool); return NGX_ERROR; } ngx_int_t ngx_quic_handle_stop_sending_frame(ngx_connection_t *c, ngx_quic_header_t *pkt, ngx_quic_stop_sending_frame_t *f) { ngx_event_t *wev; ngx_connection_t *sc; ngx_quic_stream_t *qs; ngx_quic_connection_t *qc; qc = ngx_quic_get_connection(c); if ((f->id & NGX_QUIC_STREAM_UNIDIRECTIONAL) && (f->id & NGX_QUIC_STREAM_SERVER_INITIATED) == 0) { qc->error = NGX_QUIC_ERR_STREAM_STATE_ERROR; return NGX_ERROR; } qs = ngx_quic_find_stream(&qc->streams.tree, f->id); if (qs == NULL) { qs = ngx_quic_create_client_stream(c, f->id); if (qs == NULL) { return NGX_ERROR; } if (qs == NGX_QUIC_STREAM_GONE) { return NGX_OK; } sc = qs->connection; wev = sc->write; wev->error = 1; wev->ready = 1; sc->listening->handler(sc); return NGX_OK; } wev = qs->connection->write; wev->error = 1; wev->ready = 1; if (wev->active) { wev->handler(wev); } return NGX_OK; } ngx_int_t ngx_quic_handle_max_streams_frame(ngx_connection_t *c, ngx_quic_header_t *pkt, ngx_quic_max_streams_frame_t *f) { ngx_quic_connection_t *qc; qc = ngx_quic_get_connection(c); if (f->bidi) { if (qc->streams.server_max_streams_bidi < f->limit) { qc->streams.server_max_streams_bidi = f->limit; ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0, "quic max_streams_bidi:%uL", f->limit); } } else { if (qc->streams.server_max_streams_uni < f->limit) { qc->streams.server_max_streams_uni = f->limit; ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0, "quic max_streams_uni:%uL", f->limit); } } return NGX_OK; } void ngx_quic_handle_stream_ack(ngx_connection_t *c, ngx_quic_frame_t *f) { uint64_t sent, unacked; ngx_event_t *wev; ngx_quic_stream_t *qs; ngx_quic_connection_t *qc; qc = ngx_quic_get_connection(c); qs = ngx_quic_find_stream(&qc->streams.tree, f->u.stream.stream_id); if (qs == NULL) { return; } wev = qs->connection->write; sent = qs->connection->sent; unacked = sent - qs->acked; if (unacked >= NGX_QUIC_STREAM_BUFSIZE && wev->active) { wev->ready = 1; ngx_post_event(wev, &ngx_posted_events); } qs->acked += f->u.stream.length; ngx_log_debug3(NGX_LOG_DEBUG_EVENT, qs->connection->log, 0, "quic stream ack len:%uL acked:%uL unacked:%uL", f->u.stream.length, qs->acked, sent - qs->acked); } static ngx_int_t ngx_quic_control_flow(ngx_connection_t *c, uint64_t last) { uint64_t len; ngx_event_t *rev; ngx_quic_stream_t *qs; ngx_quic_connection_t *qc; rev = c->read; qs = c->quic; qc = ngx_quic_get_connection(qs->parent); if (last <= qs->recv_last) { return NGX_OK; } len = last - qs->recv_last; ngx_log_debug4(NGX_LOG_DEBUG_EVENT, c->log, 0, "quic flow control msd:%uL/%uL md:%uL/%uL", last, qs->recv_max_data, qc->streams.recv_last + len, qc->streams.recv_max_data); qs->recv_last += len; if (!rev->error && qs->recv_last > qs->recv_max_data) { qc->error = NGX_QUIC_ERR_FLOW_CONTROL_ERROR; return NGX_ERROR; } qc->streams.recv_last += len; if (qc->streams.recv_last > qc->streams.recv_max_data) { qc->error = NGX_QUIC_ERR_FLOW_CONTROL_ERROR; return NGX_ERROR; } return NGX_OK; } static ngx_int_t ngx_quic_update_flow(ngx_connection_t *c, uint64_t last) { uint64_t len; ngx_event_t *rev; ngx_connection_t *pc; ngx_quic_frame_t *frame; ngx_quic_stream_t *qs; ngx_quic_connection_t *qc; rev = c->read; qs = c->quic; pc = qs->parent; qc = ngx_quic_get_connection(pc); if (last <= qs->recv_offset) { return NGX_OK; } len = last - qs->recv_offset; ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0, "quic flow update %uL", last); qs->recv_offset += len; if (!rev->pending_eof && !rev->error && qs->recv_max_data <= qs->recv_offset + qs->recv_window / 2) { qs->recv_max_data = qs->recv_offset + qs->recv_window; ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0, "quic flow update msd:%uL", qs->recv_max_data); frame = ngx_quic_alloc_frame(pc); if (frame == NULL) { return NGX_ERROR; } frame->level = ssl_encryption_application; frame->type = NGX_QUIC_FT_MAX_STREAM_DATA; frame->u.max_stream_data.id = qs->id; frame->u.max_stream_data.limit = qs->recv_max_data; ngx_quic_queue_frame(qc, frame); } qc->streams.recv_offset += len; if (qc->streams.recv_max_data <= qc->streams.recv_offset + qc->streams.recv_window / 2) { qc->streams.recv_max_data = qc->streams.recv_offset + qc->streams.recv_window; ngx_log_debug1(NGX_LOG_DEBUG_EVENT, pc->log, 0, "quic flow update md:%uL", qc->streams.recv_max_data); frame = ngx_quic_alloc_frame(pc); if (frame == NULL) { return NGX_ERROR; } frame->level = ssl_encryption_application; frame->type = NGX_QUIC_FT_MAX_DATA; frame->u.max_data.max_data = qc->streams.recv_max_data; ngx_quic_queue_frame(qc, frame); } return NGX_OK; }