/*
* Copyright (C) Roman Arutyunyan
* Copyright (C) Nginx, Inc.
*/
#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_http.h>
typedef struct {
ngx_http_v3_parse_uni_t parse;
ngx_int_t index;
} ngx_http_v3_uni_stream_t;
static void ngx_http_v3_close_uni_stream(ngx_connection_t *c);
static void ngx_http_v3_uni_read_handler(ngx_event_t *rev);
static void ngx_http_v3_uni_dummy_read_handler(ngx_event_t *wev);
static void ngx_http_v3_uni_dummy_write_handler(ngx_event_t *wev);
void
ngx_http_v3_init_uni_stream(ngx_connection_t *c)
{
uint64_t n;
ngx_http_v3_session_t *h3c;
ngx_http_v3_uni_stream_t *us;
h3c = ngx_http_v3_get_session(c);
if (h3c->hq) {
ngx_http_v3_finalize_connection(c,
NGX_HTTP_V3_ERR_STREAM_CREATION_ERROR,
"uni stream in hq mode");
c->data = NULL;
ngx_http_v3_close_uni_stream(c);
return;
}
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0, "http3 init uni stream");
n = c->quic->id >> 2;
if (n >= NGX_HTTP_V3_MAX_UNI_STREAMS) {
ngx_http_v3_finalize_connection(c,
NGX_HTTP_V3_ERR_STREAM_CREATION_ERROR,
"reached maximum number of uni streams");
c->data = NULL;
ngx_http_v3_close_uni_stream(c);
return;
}
ngx_quic_cancelable_stream(c);
us = ngx_pcalloc(c->pool, sizeof(ngx_http_v3_uni_stream_t));
if (us == NULL) {
ngx_http_v3_finalize_connection(c,
NGX_HTTP_V3_ERR_INTERNAL_ERROR,
"memory allocation error");
c->data = NULL;
ngx_http_v3_close_uni_stream(c);
return;
}
us->index = -1;
c->data = us;
c->read->handler = ngx_http_v3_uni_read_handler;
c->write->handler = ngx_http_v3_uni_dummy_write_handler;
ngx_http_v3_uni_read_handler(c->read);
}
static void
ngx_http_v3_close_uni_stream(ngx_connection_t *c)
{
ngx_pool_t *pool;
ngx_http_v3_session_t *h3c;
ngx_http_v3_uni_stream_t *us;
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0, "http3 close stream");
us = c->data;
if (us && us->index >= 0) {
h3c = ngx_http_v3_get_session(c);
h3c->known_streams[us->index] = NULL;
}
c->destroyed = 1;
pool = c->pool;
ngx_close_connection(c);
ngx_destroy_pool(pool);
}
ngx_int_t
ngx_http_v3_register_uni_stream(ngx_connection_t *c, uint64_t type)
{
ngx_int_t index;
ngx_http_v3_session_t *h3c;
ngx_http_v3_uni_stream_t *us;
h3c = ngx_http_v3_get_session(c);
switch (type) {
case NGX_HTTP_V3_STREAM_ENCODER:
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0,
"http3 encoder stream");
index = NGX_HTTP_V3_STREAM_CLIENT_ENCODER;
break;
case NGX_HTTP_V3_STREAM_DECODER:
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0,
"http3 decoder stream");
index = NGX_HTTP_V3_STREAM_CLIENT_DECODER;
break;
case NGX_HTTP_V3_STREAM_CONTROL:
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0,
"http3 control stream");
index = NGX_HTTP_V3_STREAM_CLIENT_CONTROL;
break;
default:
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0,
"http3 stream 0x%02xL", type);
if (h3c->known_streams[NGX_HTTP_V3_STREAM_CLIENT_ENCODER] == NULL
|| h3c->known_streams[NGX_HTTP_V3_STREAM_CLIENT_DECODER] == NULL
|| h3c->known_streams[NGX_HTTP_V3_STREAM_CLIENT_CONTROL] == NULL)
{
ngx_log_error(NGX_LOG_INFO, c->log, 0, "missing mandatory stream");
return NGX_HTTP_V3_ERR_STREAM_CREATION_ERROR;
}
index = -1;
}
if (index >= 0) {
if (h3c->known_streams[index]) {
ngx_log_error(NGX_LOG_INFO, c->log, 0, "stream exists");
return NGX_HTTP_V3_ERR_STREAM_CREATION_ERROR;
}
h3c->known_streams[index] = c;
us = c->data;
us->index = index;
}
return NGX_OK;
}
static void
ngx_http_v3_uni_read_handler(ngx_event_t *rev)
{
u_char buf[128];
ssize_t n;
ngx_buf_t b;
ngx_int_t rc;
ngx_connection_t *c;
ngx_http_v3_session_t *h3c;
ngx_http_v3_uni_stream_t *us;
c = rev->data;
us = c->data;
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0, "http3 read handler");
if (c->close) {
ngx_http_v3_close_uni_stream(c);
return;
}
ngx_memzero(&b, sizeof(ngx_buf_t));
while (rev->ready) {
n = c->recv(c, buf, sizeof(buf));
if (n == NGX_ERROR) {
rc = NGX_HTTP_V3_ERR_INTERNAL_ERROR;
goto failed;
}
if (n == 0) {
if (us->index >= 0) {
rc = NGX_HTTP_V3_ERR_CLOSED_CRITICAL_STREAM;
goto failed;
}
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0, "http3 read eof");
ngx_http_v3_close_uni_stream(c);
return;
}
if (n == NGX_AGAIN) {
break;
}
b.pos = buf;
b.last = buf + n;
h3c = ngx_http_v3_get_session(c);
h3c->total_bytes += n;
if (ngx_http_v3_check_flood(c) != NGX_OK) {
ngx_http_v3_close_uni_stream(c);
return;
}
rc = ngx_http_v3_parse_uni(c, &us->parse, &b);
if (rc == NGX_DONE) {
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0,
"http3 read done");
ngx_http_v3_close_uni_stream(c);
return;
}
if (rc > 0) {
goto failed;
}
if (rc != NGX_AGAIN) {
rc = NGX_HTTP_V3_ERR_GENERAL_PROTOCOL_ERROR;
goto failed;
}
}
if (ngx_handle_read_event(rev, 0) != NGX_OK) {
rc = NGX_HTTP_V3_ERR_INTERNAL_ERROR;
goto failed;
}
return;
failed:
ngx_http_v3_finalize_connection(c, rc, "stream error");
ngx_http_v3_close_uni_stream(c);
}
static void
ngx_http_v3_uni_dummy_read_handler(ngx_event_t *rev)
{
u_char ch;
ngx_connection_t *c;
c = rev->data;
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0, "http3 dummy read handler");
if (c->close) {
ngx_http_v3_close_uni_stream(c);
return;
}
if (rev->ready) {
if (c->recv(c, &ch, 1) != 0) {
ngx_http_v3_finalize_connection(c, NGX_HTTP_V3_ERR_NO_ERROR, NULL);
ngx_http_v3_close_uni_stream(c);
return;
}
}
if (ngx_handle_read_event(rev, 0) != NGX_OK) {
ngx_http_v3_finalize_connection(c, NGX_HTTP_V3_ERR_INTERNAL_ERROR,
NULL);
ngx_http_v3_close_uni_stream(c);
}
}
static void
ngx_http_v3_uni_dummy_write_handler(ngx_event_t *wev)
{
ngx_connection_t *c;
c = wev->data;
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0, "http3 dummy write handler");
if (ngx_handle_write_event(wev, 0) != NGX_OK) {
ngx_http_v3_finalize_connection(c, NGX_HTTP_V3_ERR_INTERNAL_ERROR,
NULL);
ngx_http_v3_close_uni_stream(c);
}
}
ngx_connection_t *
ngx_http_v3_get_uni_stream(ngx_connection_t *c, ngx_uint_t type)
{
u_char buf[NGX_HTTP_V3_VARLEN_INT_LEN];
size_t n;
ngx_int_t index;
ngx_connection_t *sc;
ngx_http_v3_session_t *h3c;
ngx_http_v3_uni_stream_t *us;
switch (type) {
case NGX_HTTP_V3_STREAM_ENCODER:
index = NGX_HTTP_V3_STREAM_SERVER_ENCODER;
break;
case NGX_HTTP_V3_STREAM_DECODER:
index = NGX_HTTP_V3_STREAM_SERVER_DECODER;
break;
case NGX_HTTP_V3_STREAM_CONTROL:
index = NGX_HTTP_V3_STREAM_SERVER_CONTROL;
break;
default:
index = -1;
}
h3c = ngx_http_v3_get_session(c);
if (index >= 0) {
if (h3c->known_streams[index]) {
return h3c->known_streams[index];
}
}
sc = ngx_quic_open_stream(c, 0);
if (sc == NULL) {
goto failed;
}
ngx_quic_cancelable_stream(sc);
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0,
"http3 create uni stream, type:%ui", type);
us = ngx_pcalloc(sc->pool, sizeof(ngx_http_v3_uni_stream_t));
if (us == NULL) {
goto failed;
}
us->index = index;
sc->data = us;
sc->read->handler = ngx_http_v3_uni_dummy_read_handler;
sc->write->handler = ngx_http_v3_uni_dummy_write_handler;
if (index >= 0) {
h3c->known_streams[index] = sc;
}
n = (u_char *) ngx_http_v3_encode_varlen_int(buf, type) - buf;
h3c = ngx_http_v3_get_session(c);
h3c->total_bytes += n;
if (sc->send(sc, buf, n) != (ssize_t) n) {
goto failed;
}
ngx_post_event(sc->read, &ngx_posted_events);
return sc;
failed:
ngx_log_error(NGX_LOG_ERR, c->log, 0, "failed to create server stream");
ngx_http_v3_finalize_connection(c, NGX_HTTP_V3_ERR_STREAM_CREATION_ERROR,
"failed to create server stream");
if (sc) {
ngx_http_v3_close_uni_stream(sc);
}
return NULL;
}
ngx_int_t
ngx_http_v3_send_settings(ngx_connection_t *c)
{
u_char *p, buf[NGX_HTTP_V3_VARLEN_INT_LEN * 6];
size_t n;
ngx_connection_t *cc;
ngx_http_v3_session_t *h3c;
ngx_http_v3_srv_conf_t *h3scf;
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0, "http3 send settings");
cc = ngx_http_v3_get_uni_stream(c, NGX_HTTP_V3_STREAM_CONTROL);
if (cc == NULL) {
return NGX_ERROR;
}
h3scf = ngx_http_v3_get_module_srv_conf(c, ngx_http_v3_module);
n = ngx_http_v3_encode_varlen_int(NULL,
NGX_HTTP_V3_PARAM_MAX_TABLE_CAPACITY);
n += ngx_http_v3_encode_varlen_int(NULL, h3scf->max_table_capacity);
n += ngx_http_v3_encode_varlen_int(NULL, NGX_HTTP_V3_PARAM_BLOCKED_STREAMS);
n += ngx_http_v3_encode_varlen_int(NULL, h3scf->max_blocked_streams);
p = (u_char *) ngx_http_v3_encode_varlen_int(buf,
NGX_HTTP_V3_FRAME_SETTINGS);
p = (u_char *) ngx_http_v3_encode_varlen_int(p, n);
p = (u_char *) ngx_http_v3_encode_varlen_int(p,
NGX_HTTP_V3_PARAM_MAX_TABLE_CAPACITY);
p = (u_char *) ngx_http_v3_encode_varlen_int(p, h3scf->max_table_capacity);
p = (u_char *) ngx_http_v3_encode_varlen_int(p,
NGX_HTTP_V3_PARAM_BLOCKED_STREAMS);
p = (u_char *) ngx_http_v3_encode_varlen_int(p, h3scf->max_blocked_streams);
n = p - buf;
h3c = ngx_http_v3_get_session(c);
h3c->total_bytes += n;
if (cc->send(cc, buf, n) != (ssize_t) n) {
goto failed;
}
return NGX_OK;
failed:
ngx_log_error(NGX_LOG_ERR, c->log, 0, "failed to send settings");
ngx_http_v3_finalize_connection(c, NGX_HTTP_V3_ERR_EXCESSIVE_LOAD,
"failed to send settings");
ngx_http_v3_close_uni_stream(cc);
return NGX_ERROR;
}
ngx_int_t
ngx_http_v3_send_goaway(ngx_connection_t *c, uint64_t id)
{
u_char *p, buf[NGX_HTTP_V3_VARLEN_INT_LEN * 3];
size_t n;
ngx_connection_t *cc;
ngx_http_v3_session_t *h3c;
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0, "http3 send goaway %uL", id);
cc = ngx_http_v3_get_uni_stream(c, NGX_HTTP_V3_STREAM_CONTROL);
if (cc == NULL) {
return NGX_ERROR;
}
n = ngx_http_v3_encode_varlen_int(NULL, id);
p = (u_char *) ngx_http_v3_encode_varlen_int(buf, NGX_HTTP_V3_FRAME_GOAWAY);
p = (u_char *) ngx_http_v3_encode_varlen_int(p, n);
p = (u_char *) ngx_http_v3_encode_varlen_int(p, id);
n = p - buf;
h3c = ngx_http_v3_get_session(c);
h3c->total_bytes += n;
if (cc->send(cc, buf, n) != (ssize_t) n) {
goto failed;
}
return NGX_OK;
failed:
ngx_log_error(NGX_LOG_ERR, c->log, 0, "failed to send goaway");
ngx_http_v3_finalize_connection(c, NGX_HTTP_V3_ERR_EXCESSIVE_LOAD,
"failed to send goaway");
ngx_http_v3_close_uni_stream(cc);
return NGX_ERROR;
}
ngx_int_t
ngx_http_v3_send_ack_section(ngx_connection_t *c, ngx_uint_t stream_id)
{
u_char buf[NGX_HTTP_V3_PREFIX_INT_LEN];
size_t n;
ngx_connection_t *dc;
ngx_http_v3_session_t *h3c;
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0,
"http3 send section acknowledgement %ui", stream_id);
dc = ngx_http_v3_get_uni_stream(c, NGX_HTTP_V3_STREAM_DECODER);
if (dc == NULL) {
return NGX_ERROR;
}
buf[0] = 0x80;
n = (u_char *) ngx_http_v3_encode_prefix_int(buf, stream_id, 7) - buf;
h3c = ngx_http_v3_get_session(c);
h3c->total_bytes += n;
if (dc->send(dc, buf, n) != (ssize_t) n) {
goto failed;
}
return NGX_OK;
failed:
ngx_log_error(NGX_LOG_ERR, c->log, 0,
"failed to send section acknowledgement");
ngx_http_v3_finalize_connection(c, NGX_HTTP_V3_ERR_EXCESSIVE_LOAD,
"failed to send section acknowledgement");
ngx_http_v3_close_uni_stream(dc);
return NGX_ERROR;
}
ngx_int_t
ngx_http_v3_send_cancel_stream(ngx_connection_t *c, ngx_uint_t stream_id)
{
u_char buf[NGX_HTTP_V3_PREFIX_INT_LEN];
size_t n;
ngx_connection_t *dc;
ngx_http_v3_session_t *h3c;
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0,
"http3 send stream cancellation %ui", stream_id);
dc = ngx_http_v3_get_uni_stream(c, NGX_HTTP_V3_STREAM_DECODER);
if (dc == NULL) {
return NGX_ERROR;
}
buf[0] = 0x40;
n = (u_char *) ngx_http_v3_encode_prefix_int(buf, stream_id, 6) - buf;
h3c = ngx_http_v3_get_session(c);
h3c->total_bytes += n;
if (dc->send(dc, buf, n) != (ssize_t) n) {
goto failed;
}
return NGX_OK;
failed:
ngx_log_error(NGX_LOG_ERR, c->log, 0, "failed to send stream cancellation");
ngx_http_v3_finalize_connection(c, NGX_HTTP_V3_ERR_EXCESSIVE_LOAD,
"failed to send stream cancellation");
ngx_http_v3_close_uni_stream(dc);
return NGX_ERROR;
}
ngx_int_t
ngx_http_v3_send_inc_insert_count(ngx_connection_t *c, ngx_uint_t inc)
{
u_char buf[NGX_HTTP_V3_PREFIX_INT_LEN];
size_t n;
ngx_connection_t *dc;
ngx_http_v3_session_t *h3c;
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0,
"http3 send insert count increment %ui", inc);
dc = ngx_http_v3_get_uni_stream(c, NGX_HTTP_V3_STREAM_DECODER);
if (dc == NULL) {
return NGX_ERROR;
}
buf[0] = 0;
n = (u_char *) ngx_http_v3_encode_prefix_int(buf, inc, 6) - buf;
h3c = ngx_http_v3_get_session(c);
h3c->total_bytes += n;
if (dc->send(dc, buf, n) != (ssize_t) n) {
goto failed;
}
return NGX_OK;
failed:
ngx_log_error(NGX_LOG_ERR, c->log, 0,
"failed to send insert count increment");
ngx_http_v3_finalize_connection(c, NGX_HTTP_V3_ERR_EXCESSIVE_LOAD,
"failed to send insert count increment");
ngx_http_v3_close_uni_stream(dc);
return NGX_ERROR;
}
ngx_int_t
ngx_http_v3_cancel_stream(ngx_connection_t *c, ngx_uint_t stream_id)
{
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0,
"http3 cancel stream %ui", stream_id);
/* we do not use dynamic tables */
return NGX_OK;
}
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