[PATCH 1 of 5] HTTP/3: removed client-side encoder support

[Roman Arutyunyan]

# HG changeset patch
# User Roman Arutyunyan <arut at nginx.com>
# Date 1633520939 -10800
#      Wed Oct 06 14:48:59 2021 +0300
# Branch quic
# Node ID d53039c3224e8227979c113f621e532aef7c0f9b
# Parent  1ead7d64e9934c1a6c0d9dd3c5f1a3d643b926d6
HTTP/3: removed client-side encoder support.

Dynamic tables are not used when generating responses anyway.

diff --git a/src/http/v3/ngx_http_v3_streams.c b/src/http/v3/ngx_http_v3_streams.c
--- a/src/http/v3/ngx_http_v3_streams.c
+++ b/src/http/v3/ngx_http_v3_streams.c
@@ -480,155 +480,6 @@ failed:
 
 
 ngx_int_t
-ngx_http_v3_send_ref_insert(ngx_connection_t *c, ngx_uint_t dynamic,
-    ngx_uint_t index, ngx_str_t *value)
-{
-    u_char            *p, buf[NGX_HTTP_V3_PREFIX_INT_LEN * 2];
-    size_t             n;
-    ngx_connection_t  *ec;
-
-    ngx_log_debug3(NGX_LOG_DEBUG_HTTP, c->log, 0,
-                   "http3 client ref insert, %s[%ui] \"%V\"",
-                   dynamic ? "dynamic" : "static", index, value);
-
-    ec = ngx_http_v3_get_uni_stream(c, NGX_HTTP_V3_STREAM_ENCODER);
-    if (ec == NULL) {
-        return NGX_ERROR;
-    }
-
-    p = buf;
-
-    *p = (dynamic ? 0x80 : 0xc0);
-    p = (u_char *) ngx_http_v3_encode_prefix_int(p, index, 6);
-
-    /* XXX option for huffman? */
-    *p = 0;
-    p = (u_char *) ngx_http_v3_encode_prefix_int(p, value->len, 7);
-
-    n = p - buf;
-
-    if (ec->send(ec, buf, n) != (ssize_t) n) {
-        goto failed;
-    }
-
-    if (ec->send(ec, value->data, value->len) != (ssize_t) value->len) {
-        goto failed;
-    }
-
-    return NGX_OK;
-
-failed:
-
-    ngx_http_v3_close_uni_stream(ec);
-
-    return NGX_ERROR;
-}
-
-
-ngx_int_t
-ngx_http_v3_send_insert(ngx_connection_t *c, ngx_str_t *name, ngx_str_t *value)
-{
-    u_char             buf[NGX_HTTP_V3_PREFIX_INT_LEN];
-    size_t             n;
-    ngx_connection_t  *ec;
-
-    ngx_log_debug2(NGX_LOG_DEBUG_HTTP, c->log, 0,
-                   "http3 client insert \"%V\":\"%V\"", name, value);
-
-    ec = ngx_http_v3_get_uni_stream(c, NGX_HTTP_V3_STREAM_ENCODER);
-    if (ec == NULL) {
-        return NGX_ERROR;
-    }
-
-    /* XXX option for huffman? */
-    buf[0] = 0x40;
-    n = (u_char *) ngx_http_v3_encode_prefix_int(buf, name->len, 5) - buf;
-
-    if (ec->send(ec, buf, n) != (ssize_t) n) {
-        goto failed;
-    }
-
-    if (ec->send(ec, name->data, name->len) != (ssize_t) name->len) {
-        goto failed;
-    }
-
-    /* XXX option for huffman? */
-    buf[0] = 0;
-    n = (u_char *) ngx_http_v3_encode_prefix_int(buf, value->len, 7) - buf;
-
-    if (ec->send(ec, buf, n) != (ssize_t) n) {
-        goto failed;
-    }
-
-    if (ec->send(ec, value->data, value->len) != (ssize_t) value->len) {
-        goto failed;
-    }
-
-    return NGX_OK;
-
-failed:
-
-    ngx_http_v3_close_uni_stream(ec);
-
-    return NGX_ERROR;
-}
-
-
-ngx_int_t
-ngx_http_v3_send_set_capacity(ngx_connection_t *c, ngx_uint_t capacity)
-{
-    u_char             buf[NGX_HTTP_V3_PREFIX_INT_LEN];
-    size_t             n;
-    ngx_connection_t  *ec;
-
-    ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0,
-                   "http3 client set capacity %ui", capacity);
-
-    ec = ngx_http_v3_get_uni_stream(c, NGX_HTTP_V3_STREAM_ENCODER);
-    if (ec == NULL) {
-        return NGX_ERROR;
-    }
-
-    buf[0] = 0x20;
-    n = (u_char *) ngx_http_v3_encode_prefix_int(buf, capacity, 5) - buf;
-
-    if (ec->send(ec, buf, n) != (ssize_t) n) {
-        ngx_http_v3_close_uni_stream(ec);
-        return NGX_ERROR;
-    }
-
-    return NGX_OK;
-}
-
-
-ngx_int_t
-ngx_http_v3_send_duplicate(ngx_connection_t *c, ngx_uint_t index)
-{
-    u_char             buf[NGX_HTTP_V3_PREFIX_INT_LEN];
-    size_t             n;
-    ngx_connection_t  *ec;
-
-    ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0,
-                   "http3 client duplicate %ui", index);
-
-    ec = ngx_http_v3_get_uni_stream(c, NGX_HTTP_V3_STREAM_ENCODER);
-    if (ec == NULL) {
-        return NGX_ERROR;
-    }
-
-    buf[0] = 0;
-    n = (u_char *) ngx_http_v3_encode_prefix_int(buf, index, 5) - buf;
-
-    if (ec->send(ec, buf, n) != (ssize_t) n) {
-        ngx_http_v3_close_uni_stream(ec);
-        return NGX_ERROR;
-    }
-
-    return NGX_OK;
-}
-
-
-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];
diff --git a/src/http/v3/ngx_http_v3_streams.h b/src/http/v3/ngx_http_v3_streams.h
--- a/src/http/v3/ngx_http_v3_streams.h
+++ b/src/http/v3/ngx_http_v3_streams.h
@@ -27,13 +27,6 @@ ngx_int_t ngx_http_v3_cancel_stream(ngx_
 
 ngx_int_t ngx_http_v3_send_settings(ngx_connection_t *c);
 ngx_int_t ngx_http_v3_send_goaway(ngx_connection_t *c, uint64_t id);
-ngx_int_t ngx_http_v3_send_ref_insert(ngx_connection_t *c, ngx_uint_t dynamic,
-    ngx_uint_t index, ngx_str_t *value);
-ngx_int_t ngx_http_v3_send_insert(ngx_connection_t *c, ngx_str_t *name,
-    ngx_str_t *value);
-ngx_int_t ngx_http_v3_send_set_capacity(ngx_connection_t *c,
-    ngx_uint_t capacity);
-ngx_int_t ngx_http_v3_send_duplicate(ngx_connection_t *c, ngx_uint_t index);
 ngx_int_t ngx_http_v3_send_ack_section(ngx_connection_t *c,
     ngx_uint_t stream_id);
 ngx_int_t ngx_http_v3_send_cancel_stream(ngx_connection_t *c,