/*
* 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_int_t ngx_quic_do_reset_stream(ngx_quic_stream_t *qs,
ngx_uint_t err);
static ngx_int_t ngx_quic_shutdown_stream_send(ngx_connection_t *c);
static ngx_int_t ngx_quic_shutdown_stream_recv(ngx_connection_t *c);
static ngx_quic_stream_t *ngx_quic_get_stream(ngx_connection_t *c, uint64_t id);
static ngx_int_t ngx_quic_reject_stream(ngx_connection_t *c, uint64_t id);
static void ngx_quic_init_stream_handler(ngx_event_t *ev);
static void ngx_quic_init_streams_handler(ngx_connection_t *c);
static ngx_int_t ngx_quic_do_init_streams(ngx_connection_t *c);
static ngx_quic_stream_t *ngx_quic_create_stream(ngx_connection_t *c,
uint64_t id);
static void ngx_quic_empty_handler(ngx_event_t *ev);
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 ngx_int_t ngx_quic_stream_flush(ngx_quic_stream_t *qs);
static void ngx_quic_stream_cleanup_handler(void *data);
static ngx_int_t ngx_quic_close_stream(ngx_quic_stream_t *qs);
static ngx_int_t ngx_quic_can_shutdown(ngx_connection_t *c);
static ngx_int_t ngx_quic_control_flow(ngx_quic_stream_t *qs, uint64_t last);
static ngx_int_t ngx_quic_update_flow(ngx_quic_stream_t *qs, uint64_t last);
static ngx_int_t ngx_quic_update_max_stream_data(ngx_quic_stream_t *qs);
static ngx_int_t ngx_quic_update_max_data(ngx_connection_t *c);
static void ngx_quic_set_event(ngx_event_t *ev);
ngx_connection_t *
ngx_quic_open_stream(ngx_connection_t *c, ngx_uint_t bidi)
{
uint64_t id;
ngx_connection_t *pc, *sc;
ngx_quic_stream_t *qs;
ngx_quic_connection_t *qc;
pc = c->quic ? c->quic->parent : c;
qc = ngx_quic_get_connection(pc);
if (qc->closing) {
return NULL;
}
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++;
}
qs = ngx_quic_create_stream(pc, id);
if (qs == NULL) {
return NULL;
}
sc = qs->connection;
sc->write->active = 1;
sc->write->ready = 1;
if (bidi) {
sc->read->active = 1;
}
return sc;
}
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_pool_t *pool;
ngx_queue_t *q;
ngx_rbtree_t *tree;
ngx_connection_t *sc;
ngx_rbtree_node_t *node;
ngx_quic_stream_t *qs;
while (!ngx_queue_empty(&qc->streams.uninitialized)) {
q = ngx_queue_head(&qc->streams.uninitialized);
ngx_queue_remove(q);
qs = ngx_queue_data(q, ngx_quic_stream_t, queue);
pool = qs->connection->pool;
ngx_close_connection(qs->connection);
ngx_destroy_pool(pool);
}
tree = &qc->streams.tree;
if (tree->root == tree->sentinel) {
return NGX_OK;
}
node = ngx_rbtree_min(tree->root, tree->sentinel);
while (node) {
qs = (ngx_quic_stream_t *) node;
node = ngx_rbtree_next(tree, node);
sc = qs->connection;
qs->recv_state = NGX_QUIC_STREAM_RECV_RESET_RECVD;
qs->send_state = NGX_QUIC_STREAM_SEND_RESET_SENT;
if (sc == NULL) {
ngx_quic_close_stream(qs);
continue;
}
sc->read->error = 1;
sc->write->error = 1;
ngx_quic_set_event(sc->read);
ngx_quic_set_event(sc->write);
sc->close = 1;
sc->read->handler(sc->read);
}
if (tree->root == tree->sentinel) {
return NGX_OK;
}
ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, 0,
"quic connection has active streams");
return NGX_AGAIN;
}
ngx_int_t
ngx_quic_reset_stream(ngx_connection_t *c, ngx_uint_t err)
{
return ngx_quic_do_reset_stream(c->quic, err);
}
static ngx_int_t
ngx_quic_do_reset_stream(ngx_quic_stream_t *qs, ngx_uint_t err)
{
ngx_connection_t *pc;
ngx_quic_frame_t *frame;
ngx_quic_connection_t *qc;
if (qs->send_state == NGX_QUIC_STREAM_SEND_DATA_RECVD
|| qs->send_state == NGX_QUIC_STREAM_SEND_RESET_SENT
|| qs->send_state == NGX_QUIC_STREAM_SEND_RESET_RECVD)
{
return NGX_OK;
}
qs->send_state = NGX_QUIC_STREAM_SEND_RESET_SENT;
qs->send_final_size = qs->send_offset;
if (qs->connection) {
qs->connection->write->error = 1;
}
pc = qs->parent;
qc = ngx_quic_get_connection(pc);
ngx_log_debug1(NGX_LOG_DEBUG_EVENT, pc->log, 0,
"quic stream id:0x%xL reset", qs->id);
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 = qs->send_offset;
ngx_quic_queue_frame(qc, frame);
ngx_quic_free_buffer(pc, &qs->send);
return NGX_OK;
}
ngx_int_t
ngx_quic_shutdown_stream(ngx_connection_t *c, int how)
{
if (how == NGX_RDWR_SHUTDOWN || how == NGX_WRITE_SHUTDOWN) {
if (ngx_quic_shutdown_stream_send(c) != NGX_OK) {
return NGX_ERROR;
}
}
if (how == NGX_RDWR_SHUTDOWN || how == NGX_READ_SHUTDOWN) {
if (ngx_quic_shutdown_stream_recv(c) != NGX_OK) {
return NGX_ERROR;
}
}
return NGX_OK;
}
static ngx_int_t
ngx_quic_shutdown_stream_send(ngx_connection_t *c)
{
ngx_quic_stream_t *qs;
qs = c->quic;
if (qs->send_state != NGX_QUIC_STREAM_SEND_READY
&& qs->send_state != NGX_QUIC_STREAM_SEND_SEND)
{
return NGX_OK;
}
qs->send_state = NGX_QUIC_STREAM_SEND_SEND;
qs->send_final_size = c->sent;
ngx_log_debug1(NGX_LOG_DEBUG_EVENT, qs->parent->log, 0,
"quic stream id:0x%xL send shutdown", qs->id);
return ngx_quic_stream_flush(qs);
}
static ngx_int_t
ngx_quic_shutdown_stream_recv(ngx_connection_t *c)
{
ngx_connection_t *pc;
ngx_quic_frame_t *frame;
ngx_quic_stream_t *qs;
ngx_quic_connection_t *qc;
qs = c->quic;
if (qs->recv_state != NGX_QUIC_STREAM_RECV_RECV
&& qs->recv_state != NGX_QUIC_STREAM_RECV_SIZE_KNOWN)
{
return NGX_OK;
}
pc = qs->parent;
qc = ngx_quic_get_connection(pc);
if (qc->conf->stream_close_code == 0) {
return NGX_OK;
}
frame = ngx_quic_alloc_frame(pc);
if (frame == NULL) {
return NGX_ERROR;
}
ngx_log_debug1(NGX_LOG_DEBUG_EVENT, pc->log, 0,
"quic stream id:0x%xL recv shutdown", qs->id);
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 = qc->conf->stream_close_code;
ngx_quic_queue_frame(qc, frame);
return NGX_OK;
}
static ngx_quic_stream_t *
ngx_quic_get_stream(ngx_connection_t *c, uint64_t id)
{
uint64_t min_id;
ngx_event_t *rev;
ngx_quic_stream_t *qs;
ngx_quic_connection_t *qc;
qc = ngx_quic_get_connection(c);
qs = ngx_quic_find_stream(&qc->streams.tree, id);
if (qs) {
return qs;
}
if (qc->shutdown || qc->closing) {
return NGX_QUIC_STREAM_GONE;
}
ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0,
"quic stream id:0x%xL is missing", id);
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.
*/
#if (NGX_SUPPRESS_WARN)
qs = NULL;
#endif
for ( /* void */ ; min_id <= id; min_id += 0x04) {
qs = ngx_quic_create_stream(c, min_id);
if (qs == NULL) {
if (ngx_quic_reject_stream(c, min_id) != NGX_OK) {
return NULL;
}
continue;
}
ngx_queue_insert_tail(&qc->streams.uninitialized, &qs->queue);
rev = qs->connection->read;
rev->handler = ngx_quic_init_stream_handler;
if (qc->streams.initialized) {
ngx_post_event(rev, &ngx_posted_events);
if (qc->push.posted) {
/*
* The posted stream can produce output immediately.
* By postponing the push event, we coalesce the stream
* output with queued frames in one UDP datagram.
*/
ngx_delete_posted_event(&qc->push);
ngx_post_event(&qc->push, &ngx_posted_events);
}
}
}
if (qs == NULL) {
return NGX_QUIC_STREAM_GONE;
}
return qs;
}
static ngx_int_t
ngx_quic_reject_stream(ngx_connection_t *c, uint64_t id)
{
uint64_t code;
ngx_quic_frame_t *frame;
ngx_quic_connection_t *qc;
qc = ngx_quic_get_connection(c);
code = (id & NGX_QUIC_STREAM_UNIDIRECTIONAL)
? qc->conf->stream_reject_code_uni
: qc->conf->stream_reject_code_bidi;
if (code == 0) {
return NGX_DECLINED;
}
ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0,
"quic stream id:0x%xL reject err:0x%xL", id, code);
frame = ngx_quic_alloc_frame(c);
if (frame == NULL) {
return NGX_ERROR;
}
frame->level = ssl_encryption_application;
frame->type = NGX_QUIC_FT_RESET_STREAM;
frame->u.reset_stream.id = id;
frame->u.reset_stream.error_code = code;
frame->u.reset_stream.final_size = 0;
ngx_quic_queue_frame(qc, frame);
frame = ngx_quic_alloc_frame(c);
if (frame == NULL) {
return NGX_ERROR;
}
frame->level = ssl_encryption_application;
frame->type = NGX_QUIC_FT_STOP_SENDING;
frame->u.stop_sending.id = id;
frame->u.stop_sending.error_code = code;
ngx_quic_queue_frame(qc, frame);
return NGX_OK;
}
static void
ngx_quic_init_stream_handler(ngx_event_t *ev)
{
ngx_connection_t *c;
ngx_quic_stream_t *qs;
c = ev->data;
qs = c->quic;
ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, 0, "quic init stream");
if ((qs->id & NGX_QUIC_STREAM_UNIDIRECTIONAL) == 0) {
c->write->active = 1;
c->write->ready = 1;
}
c->read->active = 1;
ngx_queue_remove(&qs->queue);
c->listening->handler(c);
}
ngx_int_t
ngx_quic_init_streams(ngx_connection_t *c)
{
ngx_int_t rc;
ngx_quic_connection_t *qc;
qc = ngx_quic_get_connection(c);
if (qc->streams.initialized) {
return NGX_OK;
}
rc = ngx_ssl_ocsp_validate(c);
if (rc == NGX_ERROR) {
return NGX_ERROR;
}
if (rc == NGX_AGAIN) {
c->ssl->handler = ngx_quic_init_streams_handler;
return NGX_OK;
}
return ngx_quic_do_init_streams(c);
}
static void
ngx_quic_init_streams_handler(ngx_connection_t *c)
{
if (ngx_quic_do_init_streams(c) != NGX_OK) {
ngx_quic_close_connection(c, NGX_ERROR);
}
}
static ngx_int_t
ngx_quic_do_init_streams(ngx_connection_t *c)
{
ngx_queue_t *q;
ngx_quic_stream_t *qs;
ngx_quic_connection_t *qc;
ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, 0, "quic init streams");
qc = ngx_quic_get_connection(c);
if (qc->conf->init) {
if (qc->conf->init(c) != NGX_OK) {
return NGX_ERROR;
}
}
for (q = ngx_queue_head(&qc->streams.uninitialized);
q != ngx_queue_sentinel(&qc->streams.uninitialized);
q = ngx_queue_next(q))
{
qs = ngx_queue_data(q, ngx_quic_stream_t, queue);
ngx_post_event(qs->connection->read, &ngx_posted_events);
}
qc->streams.initialized = 1;
if (!qc->closing && qc->close.timer_set) {
ngx_del_timer(&qc->close);
}
return NGX_OK;
}
static ngx_quic_stream_t *
ngx_quic_create_stream(ngx_connection_t *c, uint64_t id)
{
ngx_str_t addr_text;
ngx_log_t *log;
ngx_pool_t *pool;
ngx_uint_t reusable;
ngx_queue_t *q;
struct sockaddr *sockaddr;
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);
if (!ngx_queue_empty(&qc->streams.free)) {
q = ngx_queue_head(&qc->streams.free);
qs = ngx_queue_data(q, ngx_quic_stream_t, queue);
ngx_queue_remove(&qs->queue);
} else {
/*
* the number of streams is limited by transport
* parameters and application requirements
*/
qs = ngx_palloc(c->pool, sizeof(ngx_quic_stream_t));
if (qs == NULL) {
return NULL;
}
}
ngx_memzero(qs, sizeof(ngx_quic_stream_t));
qs->node.key = id;
qs->parent = c;
qs->id = id;
qs->send_final_size = (uint64_t) -1;
qs->recv_final_size = (uint64_t) -1;
pool = ngx_create_pool(NGX_DEFAULT_POOL_SIZE, c->log);
if (pool == NULL) {
ngx_queue_insert_tail(&qc->streams.free, &qs->queue);
return NULL;
}
log = ngx_palloc(pool, sizeof(ngx_log_t));
if (log == NULL) {
ngx_destroy_pool(pool);
ngx_queue_insert_tail(&qc->streams.free, &qs->queue);
return NULL;
}
*log = *c->log;
pool->log = log;
sockaddr = ngx_palloc(pool, c->socklen);
if (sockaddr == NULL) {
ngx_destroy_pool(pool);
ngx_queue_insert_tail(&qc->streams.free, &qs->queue);
return NULL;
}
ngx_memcpy(sockaddr, c->sockaddr, c->socklen);
if (c->addr_text.data) {
addr_text.data = ngx_pnalloc(pool, c->addr_text.len);
if (addr_text.data == NULL) {
ngx_destroy_pool(pool);
ngx_queue_insert_tail(&qc->streams.free, &qs->queue);
return NULL;
}
ngx_memcpy(addr_text.data, c->addr_text.data, c->addr_text.len);
addr_text.len = c->addr_text.len;
} else {
addr_text.len = 0;
addr_text.data = NULL;
}
reusable = c->reusable;
ngx_reusable_connection(c, 0);
sc = ngx_get_connection(c->fd, log);
if (sc == NULL) {
ngx_destroy_pool(pool);
ngx_queue_insert_tail(&qc->streams.free, &qs->queue);
ngx_reusable_connection(c, reusable);
return NULL;
}
qs->connection = sc;
sc->quic = qs;
sc->shared = 1;
sc->type = SOCK_STREAM;
sc->pool = pool;
sc->ssl = c->ssl;
sc->sockaddr = sockaddr;
sc->socklen = c->socklen;
sc->listening = c->listening;
sc->addr_text = 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->start_time = c->start_time;
sc->tcp_nodelay = NGX_TCP_NODELAY_DISABLED;
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;
sc->read->handler = ngx_quic_empty_handler;
sc->write->handler = ngx_quic_empty_handler;
log->connection = sc->number;
if (id & NGX_QUIC_STREAM_UNIDIRECTIONAL) {
if (id & NGX_QUIC_STREAM_SERVER_INITIATED) {
qs->send_max_data = qc->ctp.initial_max_stream_data_uni;
qs->recv_state = NGX_QUIC_STREAM_RECV_DATA_READ;
qs->send_state = NGX_QUIC_STREAM_SEND_READY;
} else {
qs->recv_max_data = qc->tp.initial_max_stream_data_uni;
qs->recv_state = NGX_QUIC_STREAM_RECV_RECV;
qs->send_state = NGX_QUIC_STREAM_SEND_DATA_RECVD;
}
} 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_state = NGX_QUIC_STREAM_RECV_RECV;
qs->send_state = NGX_QUIC_STREAM_SEND_READY;
}
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);
ngx_queue_insert_tail(&qc->streams.free, &qs->queue);
ngx_reusable_connection(c, reusable);
return NULL;
}
cln->handler = ngx_quic_stream_cleanup_handler;
cln->data = sc;
ngx_rbtree_insert(&qc->streams.tree, &qs->node);
return qs;
}
void
ngx_quic_cancelable_stream(ngx_connection_t *c)
{
ngx_connection_t *pc;
ngx_quic_stream_t *qs;
ngx_quic_connection_t *qc;
qs = c->quic;
pc = qs->parent;
qc = ngx_quic_get_connection(pc);
if (!qs->cancelable) {
qs->cancelable = 1;
if (ngx_quic_can_shutdown(pc) == NGX_OK) {
ngx_reusable_connection(pc, 1);
if (qc->shutdown) {
ngx_quic_shutdown_quic(pc);
}
}
}
}
static void
ngx_quic_empty_handler(ngx_event_t *ev)
{
}
static ssize_t
ngx_quic_stream_recv(ngx_connection_t *c, u_char *buf, size_t size)
{
ssize_t len;
ngx_buf_t *b;
ngx_chain_t *cl, *in;
ngx_event_t *rev;
ngx_connection_t *pc;
ngx_quic_stream_t *qs;
qs = c->quic;
pc = qs->parent;
rev = c->read;
if (qs->recv_state == NGX_QUIC_STREAM_RECV_RESET_RECVD
|| qs->recv_state == NGX_QUIC_STREAM_RECV_RESET_READ)
{
qs->recv_state = NGX_QUIC_STREAM_RECV_RESET_READ;
return NGX_ERROR;
}
ngx_log_debug2(NGX_LOG_DEBUG_EVENT, pc->log, 0,
"quic stream id:0x%xL recv buf:%uz", qs->id, size);
if (size == 0) {
return 0;
}
in = ngx_quic_read_buffer(pc, &qs->recv, size);
if (in == NGX_CHAIN_ERROR) {
return NGX_ERROR;
}
len = 0;
for (cl = in; cl; cl = cl->next) {
b = cl->buf;
len += b->last - b->pos;
buf = ngx_cpymem(buf, b->pos, b->last - b->pos);
}
ngx_quic_free_chain(pc, in);
if (len == 0) {
rev->ready = 0;
if (qs->recv_state == NGX_QUIC_STREAM_RECV_DATA_RECVD
&& qs->recv_offset == qs->recv_final_size)
{
qs->recv_state = NGX_QUIC_STREAM_RECV_DATA_READ;
}
if (qs->recv_state == NGX_QUIC_STREAM_RECV_DATA_READ) {
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;
}
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(qs, 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)
{
uint64_t n, flow;
ngx_event_t *wev;
ngx_connection_t *pc;
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 (qs->send_state != NGX_QUIC_STREAM_SEND_READY
&& qs->send_state != NGX_QUIC_STREAM_SEND_SEND)
{
wev->error = 1;
return NGX_CHAIN_ERROR;
}
qs->send_state = NGX_QUIC_STREAM_SEND_SEND;
flow = qs->acked + qc->conf->stream_buffer_size - qs->sent;
if (flow == 0) {
wev->ready = 0;
return in;
}
if (limit == 0 || limit > (off_t) flow) {
limit = flow;
}
n = qs->send.size;
in = ngx_quic_write_buffer(pc, &qs->send, in, limit, qs->sent);
if (in == NGX_CHAIN_ERROR) {
return NGX_CHAIN_ERROR;
}
n = qs->send.size - n;
c->sent += n;
qs->sent += n;
qc->streams.sent += n;
if (flow == n) {
wev->ready = 0;
}
ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0,
"quic send_chain sent:%uL", n);
if (ngx_quic_stream_flush(qs) != NGX_OK) {
return NGX_CHAIN_ERROR;
}
return in;
}
static ngx_int_t
ngx_quic_stream_flush(ngx_quic_stream_t *qs)
{
off_t limit, len;
ngx_uint_t last;
ngx_chain_t *out;
ngx_quic_frame_t *frame;
ngx_connection_t *pc;
ngx_quic_connection_t *qc;
if (qs->send_state != NGX_QUIC_STREAM_SEND_SEND) {
return NGX_OK;
}
pc = qs->parent;
qc = ngx_quic_get_connection(pc);
if (qc->streams.send_max_data == 0) {
qc->streams.send_max_data = qc->ctp.initial_max_data;
}
limit = ngx_min(qc->streams.send_max_data - qc->streams.send_offset,
qs->send_max_data - qs->send_offset);
ngx_log_debug2(NGX_LOG_DEBUG_EVENT, pc->log, 0,
"quic stream id:0x%xL flush limit:%O", qs->id, limit);
len = qs->send.offset;
out = ngx_quic_read_buffer(pc, &qs->send, limit);
if (out == NGX_CHAIN_ERROR) {
return NGX_ERROR;
}
len = qs->send.offset - len;
last = 0;
if (qs->send_final_size != (uint64_t) -1
&& qs->send_final_size == qs->send.offset)
{
qs->send_state = NGX_QUIC_STREAM_SEND_DATA_SENT;
last = 1;
}
if (len == 0 && !last) {
return NGX_OK;
}
frame = ngx_quic_alloc_frame(pc);
if (frame == NULL) {
return NGX_ERROR;
}
frame->level = ssl_encryption_application;
frame->type = NGX_QUIC_FT_STREAM;
frame->data = out;
frame->u.stream.off = 1;
frame->u.stream.len = 1;
frame->u.stream.fin = last;
frame->u.stream.stream_id = qs->id;
frame->u.stream.offset = qs->send_offset;
frame->u.stream.length = len;
ngx_quic_queue_frame(qc, frame);
qs->send_offset += len;
qc->streams.send_offset += len;
ngx_log_debug3(NGX_LOG_DEBUG_EVENT, pc->log, 0,
"quic stream id:0x%xL flush len:%O last:%ui",
qs->id, len, last);
if (qs->connection == NULL) {
return ngx_quic_close_stream(qs);
}
return NGX_OK;
}
static void
ngx_quic_stream_cleanup_handler(void *data)
{
ngx_connection_t *c = data;
ngx_quic_stream_t *qs;
ngx_quic_connection_t *qc;
qs = c->quic;
ngx_log_debug1(NGX_LOG_DEBUG_EVENT, qs->parent->log, 0,
"quic stream id:0x%xL cleanup", qs->id);
if (ngx_quic_shutdown_stream(c, NGX_RDWR_SHUTDOWN) != NGX_OK) {
qs->connection = NULL;
goto failed;
}
qs->connection = NULL;
if (ngx_quic_close_stream(qs) != NGX_OK) {
goto failed;
}
return;
failed:
qc = ngx_quic_get_connection(qs->parent);
qc->error = NGX_QUIC_ERR_INTERNAL_ERROR;
ngx_post_event(&qc->close, &ngx_posted_events);
}
static ngx_int_t
ngx_quic_close_stream(ngx_quic_stream_t *qs)
{
ngx_connection_t *pc;
ngx_quic_frame_t *frame;
ngx_quic_connection_t *qc;
pc = qs->parent;
qc = ngx_quic_get_connection(pc);
if (!qc->closing) {
/* make sure everything is sent and final size is received */
if (qs->recv_state == NGX_QUIC_STREAM_RECV_RECV) {
return NGX_OK;
}
if (qs->send_state != NGX_QUIC_STREAM_SEND_DATA_RECVD
&& qs->send_state != NGX_QUIC_STREAM_SEND_RESET_RECVD)
{
return NGX_OK;
}
}
ngx_log_debug1(NGX_LOG_DEBUG_EVENT, pc->log, 0,
"quic stream id:0x%xL close", qs->id);
ngx_quic_free_buffer(pc, &qs->send);
ngx_quic_free_buffer(pc, &qs->recv);
ngx_rbtree_delete(&qc->streams.tree, &qs->node);
ngx_queue_insert_tail(&qc->streams.free, &qs->queue);
if (qc->closing) {
/* schedule handler call to continue ngx_quic_close_connection() */
ngx_post_event(&qc->close, &ngx_posted_events);
return NGX_OK;
}
if (!pc->reusable && ngx_quic_can_shutdown(pc) == NGX_OK) {
ngx_reusable_connection(pc, 1);
}
if (qc->shutdown) {
ngx_quic_shutdown_quic(pc);
return NGX_OK;
}
if ((qs->id & NGX_QUIC_STREAM_SERVER_INITIATED) == 0) {
frame = ngx_quic_alloc_frame(pc);
if (frame == NULL) {
return NGX_ERROR;
}
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);
}
return NGX_OK;
}
static ngx_int_t
ngx_quic_can_shutdown(ngx_connection_t *c)
{
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 (tree->root != tree->sentinel) {
for (node = ngx_rbtree_min(tree->root, tree->sentinel);
node;
node = ngx_rbtree_next(tree, node))
{
qs = (ngx_quic_stream_t *) node;
if (!qs->cancelable) {
return NGX_DECLINED;
}
}
}
return NGX_OK;
}
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_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_get_stream(c, f->stream_id);
if (qs == NULL) {
return NGX_ERROR;
}
if (qs == NGX_QUIC_STREAM_GONE) {
return NGX_OK;
}
if (qs->recv_state != NGX_QUIC_STREAM_RECV_RECV
&& qs->recv_state != NGX_QUIC_STREAM_RECV_SIZE_KNOWN)
{
return NGX_OK;
}
if (ngx_quic_control_flow(qs, last) != NGX_OK) {
return NGX_ERROR;
}
if (qs->recv_final_size != (uint64_t) -1 && last > qs->recv_final_size) {
qc->error = NGX_QUIC_ERR_FINAL_SIZE_ERROR;
return NGX_ERROR;
}
if (last < qs->recv_offset) {
return NGX_OK;
}
if (f->fin) {
if (qs->recv_final_size != (uint64_t) -1 && qs->recv_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;
}
qs->recv_final_size = last;
qs->recv_state = NGX_QUIC_STREAM_RECV_SIZE_KNOWN;
}
if (ngx_quic_write_buffer(c, &qs->recv, frame->data, f->length, f->offset)
== NGX_CHAIN_ERROR)
{
return NGX_ERROR;
}
if (qs->recv_state == NGX_QUIC_STREAM_RECV_SIZE_KNOWN
&& qs->recv.size == qs->recv_final_size)
{
qs->recv_state = NGX_QUIC_STREAM_RECV_DATA_RECVD;
}
if (qs->connection == NULL) {
return ngx_quic_close_stream(qs);
}
if (f->offset <= qs->recv_offset) {
ngx_quic_set_event(qs->connection->read);
}
return NGX_OK;
}
ngx_int_t
ngx_quic_handle_max_data_frame(ngx_connection_t *c,
ngx_quic_max_data_frame_t *f)
{
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 (tree->root == tree->sentinel
|| qc->streams.send_offset < qc->streams.send_max_data)
{
/* not blocked on MAX_DATA */
qc->streams.send_max_data = f->max_data;
return NGX_OK;
}
qc->streams.send_max_data = f->max_data;
node = ngx_rbtree_min(tree->root, tree->sentinel);
while (node && qc->streams.send_offset < qc->streams.send_max_data) {
qs = (ngx_quic_stream_t *) node;
node = ngx_rbtree_next(tree, node);
if (ngx_quic_stream_flush(qs) != NGX_OK) {
return NGX_ERROR;
}
}
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_data_blocked_frame(ngx_connection_t *c,
ngx_quic_header_t *pkt, ngx_quic_data_blocked_frame_t *f)
{
return ngx_quic_update_max_data(c);
}
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)
{
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_get_stream(c, f->id);
if (qs == NULL) {
return NGX_ERROR;
}
if (qs == NGX_QUIC_STREAM_GONE) {
return NGX_OK;
}
return ngx_quic_update_max_stream_data(qs);
}
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)
{
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_get_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) {
return NGX_OK;
}
if (qs->send_offset < qs->send_max_data) {
/* not blocked on MAX_STREAM_DATA */
qs->send_max_data = f->limit;
return NGX_OK;
}
qs->send_max_data = f->limit;
return ngx_quic_stream_flush(qs);
}
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_event_t *rev;
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_get_stream(c, f->id);
if (qs == NULL) {
return NGX_ERROR;
}
if (qs == NGX_QUIC_STREAM_GONE) {
return NGX_OK;
}
if (qs->recv_state == NGX_QUIC_STREAM_RECV_RESET_RECVD
|| qs->recv_state == NGX_QUIC_STREAM_RECV_RESET_READ)
{
return NGX_OK;
}
qs->recv_state = NGX_QUIC_STREAM_RECV_RESET_RECVD;
if (ngx_quic_control_flow(qs, f->final_size) != NGX_OK) {
return NGX_ERROR;
}
if (qs->recv_final_size != (uint64_t) -1
&& qs->recv_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->recv_final_size = f->final_size;
if (ngx_quic_update_flow(qs, qs->recv_final_size) != NGX_OK) {
return NGX_ERROR;
}
if (qs->connection == NULL) {
return ngx_quic_close_stream(qs);
}
rev = qs->connection->read;
rev->error = 1;
ngx_quic_set_event(rev);
return NGX_OK;
}
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_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_get_stream(c, f->id);
if (qs == NULL) {
return NGX_ERROR;
}
if (qs == NGX_QUIC_STREAM_GONE) {
return NGX_OK;
}
if (ngx_quic_do_reset_stream(qs, f->error_code) != NGX_OK) {
return NGX_ERROR;
}
if (qs->connection == NULL) {
return ngx_quic_close_stream(qs);
}
ngx_quic_set_event(qs->connection->write);
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 acked;
ngx_quic_stream_t *qs;
ngx_quic_connection_t *qc;
qc = ngx_quic_get_connection(c);
switch (f->type) {
case NGX_QUIC_FT_RESET_STREAM:
qs = ngx_quic_find_stream(&qc->streams.tree, f->u.reset_stream.id);
if (qs == NULL) {
return;
}
qs->send_state = NGX_QUIC_STREAM_SEND_RESET_RECVD;
ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0,
"quic stream id:0x%xL ack reset final_size:%uL",
qs->id, f->u.reset_stream.final_size);
break;
case NGX_QUIC_FT_STREAM:
qs = ngx_quic_find_stream(&qc->streams.tree, f->u.stream.stream_id);
if (qs == NULL) {
return;
}
acked = qs->acked;
qs->acked += f->u.stream.length;
if (f->u.stream.fin) {
qs->fin_acked = 1;
}
if (qs->send_state == NGX_QUIC_STREAM_SEND_DATA_SENT
&& qs->acked == qs->sent && qs->fin_acked)
{
qs->send_state = NGX_QUIC_STREAM_SEND_DATA_RECVD;
}
ngx_log_debug4(NGX_LOG_DEBUG_EVENT, c->log, 0,
"quic stream id:0x%xL ack len:%uL fin:%d unacked:%uL",
qs->id, f->u.stream.length, f->u.stream.fin,
qs->sent - qs->acked);
if (qs->connection
&& qs->sent - acked == qc->conf->stream_buffer_size
&& f->u.stream.length > 0)
{
ngx_quic_set_event(qs->connection->write);
}
break;
default:
return;
}
if (qs->connection == NULL) {
ngx_quic_close_stream(qs);
}
}
static ngx_int_t
ngx_quic_control_flow(ngx_quic_stream_t *qs, uint64_t last)
{
uint64_t len;
ngx_connection_t *pc;
ngx_quic_connection_t *qc;
pc = qs->parent;
qc = ngx_quic_get_connection(pc);
if (last <= qs->recv_last) {
return NGX_OK;
}
len = last - qs->recv_last;
ngx_log_debug5(NGX_LOG_DEBUG_EVENT, pc->log, 0,
"quic stream id:0x%xL flow control msd:%uL/%uL md:%uL/%uL",
qs->id, last, qs->recv_max_data, qc->streams.recv_last + len,
qc->streams.recv_max_data);
qs->recv_last += len;
if (qs->recv_state == NGX_QUIC_STREAM_RECV_RECV
&& 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_quic_stream_t *qs, uint64_t last)
{
uint64_t len;
ngx_connection_t *pc;
ngx_quic_connection_t *qc;
pc = qs->parent;
qc = ngx_quic_get_connection(pc);
if (last <= qs->recv_offset) {
return NGX_OK;
}
len = last - qs->recv_offset;
ngx_log_debug2(NGX_LOG_DEBUG_EVENT, pc->log, 0,
"quic stream id:0x%xL flow update %uL", qs->id, last);
qs->recv_offset += len;
if (qs->recv_max_data <= qs->recv_offset + qs->recv_window / 2) {
if (ngx_quic_update_max_stream_data(qs) != NGX_OK) {
return NGX_ERROR;
}
}
qc->streams.recv_offset += len;
if (qc->streams.recv_max_data
<= qc->streams.recv_offset + qc->streams.recv_window / 2)
{
if (ngx_quic_update_max_data(pc) != NGX_OK) {
return NGX_ERROR;
}
}
return NGX_OK;
}
static ngx_int_t
ngx_quic_update_max_stream_data(ngx_quic_stream_t *qs)
{
uint64_t recv_max_data;
ngx_connection_t *pc;
ngx_quic_frame_t *frame;
ngx_quic_connection_t *qc;
pc = qs->parent;
qc = ngx_quic_get_connection(pc);
if (qs->recv_state != NGX_QUIC_STREAM_RECV_RECV) {
return NGX_OK;
}
recv_max_data = qs->recv_offset + qs->recv_window;
if (qs->recv_max_data == recv_max_data) {
return NGX_OK;
}
qs->recv_max_data = recv_max_data;
ngx_log_debug2(NGX_LOG_DEBUG_EVENT, pc->log, 0,
"quic stream id:0x%xL flow update msd:%uL",
qs->id, 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);
return NGX_OK;
}
static ngx_int_t
ngx_quic_update_max_data(ngx_connection_t *c)
{
uint64_t recv_max_data;
ngx_quic_frame_t *frame;
ngx_quic_connection_t *qc;
qc = ngx_quic_get_connection(c);
recv_max_data = qc->streams.recv_offset + qc->streams.recv_window;
if (qc->streams.recv_max_data == recv_max_data) {
return NGX_OK;
}
qc->streams.recv_max_data = recv_max_data;
ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0,
"quic flow update md:%uL", qc->streams.recv_max_data);
frame = ngx_quic_alloc_frame(c);
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;
}
static void
ngx_quic_set_event(ngx_event_t *ev)
{
ev->ready = 1;
if (ev->active) {
ngx_post_event(ev, &ngx_posted_events);
}
}
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