1001 lines
28 KiB
C
1001 lines
28 KiB
C
/*
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* nghttp2 - HTTP/2 C Library
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*
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* Copyright (c) 2013 Tatsuhiro Tsujikawa
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include "nghttp2_frame.h"
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#include <string.h>
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#include <assert.h>
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#include <stdio.h>
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#include <errno.h>
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#include "nghttp2_helper.h"
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#include "nghttp2_net.h"
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#include "nghttp2_priority_spec.h"
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void nghttp2_frame_pack_frame_hd(uint8_t *buf, const nghttp2_frame_hd *hd) {
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nghttp2_put_uint32be(&buf[0], (uint32_t)(hd->length << 8));
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buf[3] = hd->type;
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buf[4] = hd->flags;
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nghttp2_put_uint32be(&buf[5], (uint32_t)hd->stream_id);
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/* ignore hd->reserved for now */
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}
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void nghttp2_frame_unpack_frame_hd(nghttp2_frame_hd *hd, const uint8_t *buf) {
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hd->length = nghttp2_get_uint32(&buf[0]) >> 8;
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hd->type = buf[3];
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hd->flags = buf[4];
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hd->stream_id = nghttp2_get_uint32(&buf[5]) & NGHTTP2_STREAM_ID_MASK;
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hd->reserved = 0;
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}
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void nghttp2_frame_hd_init(nghttp2_frame_hd *hd, size_t length, uint8_t type,
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uint8_t flags, int32_t stream_id) {
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hd->length = length;
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hd->type = type;
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hd->flags = flags;
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hd->stream_id = stream_id;
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hd->reserved = 0;
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}
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void nghttp2_frame_headers_init(nghttp2_headers *frame, uint8_t flags,
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int32_t stream_id, nghttp2_headers_category cat,
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const nghttp2_priority_spec *pri_spec,
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nghttp2_nv *nva, size_t nvlen) {
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nghttp2_frame_hd_init(&frame->hd, 0, NGHTTP2_HEADERS, flags, stream_id);
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frame->padlen = 0;
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frame->nva = nva;
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frame->nvlen = nvlen;
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frame->cat = cat;
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if (pri_spec) {
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frame->pri_spec = *pri_spec;
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} else {
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nghttp2_priority_spec_default_init(&frame->pri_spec);
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}
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}
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void nghttp2_frame_headers_free(nghttp2_headers *frame, nghttp2_mem *mem) {
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nghttp2_nv_array_del(frame->nva, mem);
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}
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void nghttp2_frame_priority_init(nghttp2_priority *frame, int32_t stream_id,
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const nghttp2_priority_spec *pri_spec) {
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nghttp2_frame_hd_init(&frame->hd, NGHTTP2_PRIORITY_SPECLEN, NGHTTP2_PRIORITY,
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NGHTTP2_FLAG_NONE, stream_id);
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frame->pri_spec = *pri_spec;
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}
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void nghttp2_frame_priority_free(nghttp2_priority *frame _U_) {}
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void nghttp2_frame_rst_stream_init(nghttp2_rst_stream *frame, int32_t stream_id,
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uint32_t error_code) {
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nghttp2_frame_hd_init(&frame->hd, 4, NGHTTP2_RST_STREAM, NGHTTP2_FLAG_NONE,
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stream_id);
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frame->error_code = error_code;
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}
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void nghttp2_frame_rst_stream_free(nghttp2_rst_stream *frame _U_) {}
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void nghttp2_frame_settings_init(nghttp2_settings *frame, uint8_t flags,
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nghttp2_settings_entry *iv, size_t niv) {
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nghttp2_frame_hd_init(&frame->hd, niv * NGHTTP2_FRAME_SETTINGS_ENTRY_LENGTH,
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NGHTTP2_SETTINGS, flags, 0);
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frame->niv = niv;
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frame->iv = iv;
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}
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void nghttp2_frame_settings_free(nghttp2_settings *frame, nghttp2_mem *mem) {
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nghttp2_mem_free(mem, frame->iv);
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}
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void nghttp2_frame_push_promise_init(nghttp2_push_promise *frame, uint8_t flags,
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int32_t stream_id,
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int32_t promised_stream_id,
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nghttp2_nv *nva, size_t nvlen) {
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nghttp2_frame_hd_init(&frame->hd, 0, NGHTTP2_PUSH_PROMISE, flags, stream_id);
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frame->padlen = 0;
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frame->nva = nva;
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frame->nvlen = nvlen;
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frame->promised_stream_id = promised_stream_id;
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frame->reserved = 0;
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}
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void nghttp2_frame_push_promise_free(nghttp2_push_promise *frame,
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nghttp2_mem *mem) {
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nghttp2_nv_array_del(frame->nva, mem);
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}
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void nghttp2_frame_ping_init(nghttp2_ping *frame, uint8_t flags,
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const uint8_t *opaque_data) {
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nghttp2_frame_hd_init(&frame->hd, 8, NGHTTP2_PING, flags, 0);
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if (opaque_data) {
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memcpy(frame->opaque_data, opaque_data, sizeof(frame->opaque_data));
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} else {
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memset(frame->opaque_data, 0, sizeof(frame->opaque_data));
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}
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}
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void nghttp2_frame_ping_free(nghttp2_ping *frame _U_) {}
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void nghttp2_frame_goaway_init(nghttp2_goaway *frame, int32_t last_stream_id,
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uint32_t error_code, uint8_t *opaque_data,
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size_t opaque_data_len) {
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nghttp2_frame_hd_init(&frame->hd, 8 + opaque_data_len, NGHTTP2_GOAWAY,
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NGHTTP2_FLAG_NONE, 0);
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frame->last_stream_id = last_stream_id;
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frame->error_code = error_code;
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frame->opaque_data = opaque_data;
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frame->opaque_data_len = opaque_data_len;
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frame->reserved = 0;
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}
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void nghttp2_frame_goaway_free(nghttp2_goaway *frame, nghttp2_mem *mem) {
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nghttp2_mem_free(mem, frame->opaque_data);
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}
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void nghttp2_frame_window_update_init(nghttp2_window_update *frame,
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uint8_t flags, int32_t stream_id,
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int32_t window_size_increment) {
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nghttp2_frame_hd_init(&frame->hd, 4, NGHTTP2_WINDOW_UPDATE, flags, stream_id);
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frame->window_size_increment = window_size_increment;
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frame->reserved = 0;
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}
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void nghttp2_frame_window_update_free(nghttp2_window_update *frame _U_) {}
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size_t nghttp2_frame_trail_padlen(nghttp2_frame *frame, size_t padlen) {
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/* We have iframe->padlen == 0, but iframe->frame.hd.flags may have
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NGHTTP2_FLAG_PADDED set. This happens when receiving
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CONTINUATION frame, since we don't reset flags after HEADERS was
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received. */
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if (padlen == 0) {
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return 0;
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}
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return padlen - ((frame->hd.flags & NGHTTP2_FLAG_PADDED) > 0);
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}
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void nghttp2_frame_data_init(nghttp2_data *frame, uint8_t flags,
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int32_t stream_id) {
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/* At this moment, the length of DATA frame is unknown */
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nghttp2_frame_hd_init(&frame->hd, 0, NGHTTP2_DATA, flags, stream_id);
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frame->padlen = 0;
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}
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void nghttp2_frame_data_free(nghttp2_data *frame _U_) {}
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void nghttp2_frame_extension_init(nghttp2_extension *frame, uint8_t type,
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uint8_t flags, int32_t stream_id,
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void *payload) {
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nghttp2_frame_hd_init(&frame->hd, 0, type, flags, stream_id);
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frame->payload = payload;
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}
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void nghttp2_frame_extension_free(nghttp2_extension *frame _U_) {}
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void nghttp2_frame_altsvc_init(nghttp2_extension *frame, int32_t stream_id,
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uint8_t *origin, size_t origin_len,
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uint8_t *field_value, size_t field_value_len) {
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nghttp2_ext_altsvc *altsvc;
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nghttp2_frame_hd_init(&frame->hd, 2 + origin_len + field_value_len,
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NGHTTP2_ALTSVC, NGHTTP2_FLAG_NONE, stream_id);
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altsvc = frame->payload;
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altsvc->origin = origin;
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altsvc->origin_len = origin_len;
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altsvc->field_value = field_value;
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altsvc->field_value_len = field_value_len;
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}
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void nghttp2_frame_altsvc_free(nghttp2_extension *frame, nghttp2_mem *mem) {
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nghttp2_ext_altsvc *altsvc;
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altsvc = frame->payload;
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/* We use the same buffer for altsvc->origin and
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altsvc->field_value. */
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nghttp2_mem_free(mem, altsvc->origin);
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}
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size_t nghttp2_frame_priority_len(uint8_t flags) {
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if (flags & NGHTTP2_FLAG_PRIORITY) {
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return NGHTTP2_PRIORITY_SPECLEN;
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}
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return 0;
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}
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size_t nghttp2_frame_headers_payload_nv_offset(nghttp2_headers *frame) {
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return nghttp2_frame_priority_len(frame->hd.flags);
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}
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/*
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* Call this function after payload was serialized, but not before
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* changing buf->pos and serializing frame header.
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*
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* This function assumes bufs->cur points to the last buf chain of the
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* frame(s).
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*
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* This function serializes frame header for HEADERS/PUSH_PROMISE and
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* handles their successive CONTINUATION frames.
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*
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* We don't process any padding here.
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*/
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static int frame_pack_headers_shared(nghttp2_bufs *bufs,
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nghttp2_frame_hd *frame_hd) {
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nghttp2_buf *buf;
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nghttp2_buf_chain *ci, *ce;
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nghttp2_frame_hd hd;
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buf = &bufs->head->buf;
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hd = *frame_hd;
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hd.length = nghttp2_buf_len(buf);
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DEBUGF(fprintf(stderr, "send: HEADERS/PUSH_PROMISE, payloadlen=%zu\n",
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hd.length));
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/* We have multiple frame buffers, which means one or more
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CONTINUATION frame is involved. Remove END_HEADERS flag from the
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first frame. */
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if (bufs->head != bufs->cur) {
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hd.flags = (uint8_t)(hd.flags & ~NGHTTP2_FLAG_END_HEADERS);
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}
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buf->pos -= NGHTTP2_FRAME_HDLEN;
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nghttp2_frame_pack_frame_hd(buf->pos, &hd);
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if (bufs->head != bufs->cur) {
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/* 2nd and later frames are CONTINUATION frames. */
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hd.type = NGHTTP2_CONTINUATION;
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/* We don't have no flags except for last CONTINUATION */
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hd.flags = NGHTTP2_FLAG_NONE;
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ce = bufs->cur;
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for (ci = bufs->head->next; ci != ce; ci = ci->next) {
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buf = &ci->buf;
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hd.length = nghttp2_buf_len(buf);
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DEBUGF(fprintf(stderr, "send: int CONTINUATION, payloadlen=%zu\n",
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hd.length));
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buf->pos -= NGHTTP2_FRAME_HDLEN;
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nghttp2_frame_pack_frame_hd(buf->pos, &hd);
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}
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buf = &ci->buf;
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hd.length = nghttp2_buf_len(buf);
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/* Set END_HEADERS flag for last CONTINUATION */
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hd.flags = NGHTTP2_FLAG_END_HEADERS;
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DEBUGF(fprintf(stderr, "send: last CONTINUATION, payloadlen=%zu\n",
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hd.length));
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buf->pos -= NGHTTP2_FRAME_HDLEN;
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nghttp2_frame_pack_frame_hd(buf->pos, &hd);
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}
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return 0;
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}
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int nghttp2_frame_pack_headers(nghttp2_bufs *bufs, nghttp2_headers *frame,
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nghttp2_hd_deflater *deflater) {
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size_t nv_offset;
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int rv;
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nghttp2_buf *buf;
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assert(bufs->head == bufs->cur);
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nv_offset = nghttp2_frame_headers_payload_nv_offset(frame);
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buf = &bufs->cur->buf;
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buf->pos += nv_offset;
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buf->last = buf->pos;
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/* This call will adjust buf->last to the correct position */
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rv = nghttp2_hd_deflate_hd_bufs(deflater, bufs, frame->nva, frame->nvlen);
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if (rv == NGHTTP2_ERR_BUFFER_ERROR) {
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rv = NGHTTP2_ERR_HEADER_COMP;
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}
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buf->pos -= nv_offset;
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if (rv != 0) {
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return rv;
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}
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if (frame->hd.flags & NGHTTP2_FLAG_PRIORITY) {
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nghttp2_frame_pack_priority_spec(buf->pos, &frame->pri_spec);
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}
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frame->padlen = 0;
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frame->hd.length = nghttp2_bufs_len(bufs);
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return frame_pack_headers_shared(bufs, &frame->hd);
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}
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void nghttp2_frame_pack_priority_spec(uint8_t *buf,
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const nghttp2_priority_spec *pri_spec) {
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nghttp2_put_uint32be(buf, (uint32_t)pri_spec->stream_id);
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if (pri_spec->exclusive) {
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buf[0] |= 0x80;
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}
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buf[4] = (uint8_t)(pri_spec->weight - 1);
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}
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void nghttp2_frame_unpack_priority_spec(nghttp2_priority_spec *pri_spec,
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uint8_t flags _U_,
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const uint8_t *payload,
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size_t payloadlen _U_) {
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int32_t dep_stream_id;
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uint8_t exclusive;
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int32_t weight;
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dep_stream_id = nghttp2_get_uint32(payload) & NGHTTP2_STREAM_ID_MASK;
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exclusive = (payload[0] & 0x80) > 0;
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weight = payload[4] + 1;
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nghttp2_priority_spec_init(pri_spec, dep_stream_id, weight, exclusive);
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}
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int nghttp2_frame_unpack_headers_payload(nghttp2_headers *frame,
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const uint8_t *payload,
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size_t payloadlen) {
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if (frame->hd.flags & NGHTTP2_FLAG_PRIORITY) {
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nghttp2_frame_unpack_priority_spec(&frame->pri_spec, frame->hd.flags,
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payload, payloadlen);
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} else {
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nghttp2_priority_spec_default_init(&frame->pri_spec);
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}
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frame->nva = NULL;
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frame->nvlen = 0;
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return 0;
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}
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int nghttp2_frame_pack_priority(nghttp2_bufs *bufs, nghttp2_priority *frame) {
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nghttp2_buf *buf;
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assert(bufs->head == bufs->cur);
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buf = &bufs->head->buf;
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assert(nghttp2_buf_avail(buf) >= NGHTTP2_PRIORITY_SPECLEN);
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buf->pos -= NGHTTP2_FRAME_HDLEN;
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nghttp2_frame_pack_frame_hd(buf->pos, &frame->hd);
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nghttp2_frame_pack_priority_spec(buf->last, &frame->pri_spec);
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buf->last += NGHTTP2_PRIORITY_SPECLEN;
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return 0;
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}
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void nghttp2_frame_unpack_priority_payload(nghttp2_priority *frame,
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const uint8_t *payload,
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size_t payloadlen) {
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nghttp2_frame_unpack_priority_spec(&frame->pri_spec, frame->hd.flags, payload,
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payloadlen);
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}
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int nghttp2_frame_pack_rst_stream(nghttp2_bufs *bufs,
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nghttp2_rst_stream *frame) {
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nghttp2_buf *buf;
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assert(bufs->head == bufs->cur);
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buf = &bufs->head->buf;
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assert(nghttp2_buf_avail(buf) >= 4);
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buf->pos -= NGHTTP2_FRAME_HDLEN;
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nghttp2_frame_pack_frame_hd(buf->pos, &frame->hd);
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nghttp2_put_uint32be(buf->last, frame->error_code);
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buf->last += 4;
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return 0;
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}
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void nghttp2_frame_unpack_rst_stream_payload(nghttp2_rst_stream *frame,
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const uint8_t *payload,
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size_t payloadlen _U_) {
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frame->error_code = nghttp2_get_uint32(payload);
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}
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int nghttp2_frame_pack_settings(nghttp2_bufs *bufs, nghttp2_settings *frame) {
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nghttp2_buf *buf;
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assert(bufs->head == bufs->cur);
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buf = &bufs->head->buf;
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if (nghttp2_buf_avail(buf) < frame->hd.length) {
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return NGHTTP2_ERR_FRAME_SIZE_ERROR;
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}
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buf->pos -= NGHTTP2_FRAME_HDLEN;
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nghttp2_frame_pack_frame_hd(buf->pos, &frame->hd);
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buf->last +=
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nghttp2_frame_pack_settings_payload(buf->last, frame->iv, frame->niv);
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return 0;
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}
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size_t nghttp2_frame_pack_settings_payload(uint8_t *buf,
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const nghttp2_settings_entry *iv,
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size_t niv) {
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size_t i;
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for (i = 0; i < niv; ++i, buf += NGHTTP2_FRAME_SETTINGS_ENTRY_LENGTH) {
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nghttp2_put_uint16be(buf, (uint16_t)iv[i].settings_id);
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nghttp2_put_uint32be(buf + 2, iv[i].value);
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}
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return NGHTTP2_FRAME_SETTINGS_ENTRY_LENGTH * niv;
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}
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|
|
void nghttp2_frame_unpack_settings_payload(nghttp2_settings *frame,
|
|
nghttp2_settings_entry *iv,
|
|
size_t niv) {
|
|
frame->iv = iv;
|
|
frame->niv = niv;
|
|
}
|
|
|
|
void nghttp2_frame_unpack_settings_entry(nghttp2_settings_entry *iv,
|
|
const uint8_t *payload) {
|
|
iv->settings_id = nghttp2_get_uint16(&payload[0]);
|
|
iv->value = nghttp2_get_uint32(&payload[2]);
|
|
}
|
|
|
|
int nghttp2_frame_unpack_settings_payload2(nghttp2_settings_entry **iv_ptr,
|
|
size_t *niv_ptr,
|
|
const uint8_t *payload,
|
|
size_t payloadlen,
|
|
nghttp2_mem *mem) {
|
|
size_t i;
|
|
|
|
*niv_ptr = payloadlen / NGHTTP2_FRAME_SETTINGS_ENTRY_LENGTH;
|
|
|
|
if (*niv_ptr == 0) {
|
|
*iv_ptr = NULL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
*iv_ptr =
|
|
nghttp2_mem_malloc(mem, (*niv_ptr) * sizeof(nghttp2_settings_entry));
|
|
|
|
if (*iv_ptr == NULL) {
|
|
return NGHTTP2_ERR_NOMEM;
|
|
}
|
|
|
|
for (i = 0; i < *niv_ptr; ++i) {
|
|
size_t off = i * NGHTTP2_FRAME_SETTINGS_ENTRY_LENGTH;
|
|
nghttp2_frame_unpack_settings_entry(&(*iv_ptr)[i], &payload[off]);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int nghttp2_frame_pack_push_promise(nghttp2_bufs *bufs,
|
|
nghttp2_push_promise *frame,
|
|
nghttp2_hd_deflater *deflater) {
|
|
size_t nv_offset = 4;
|
|
int rv;
|
|
nghttp2_buf *buf;
|
|
|
|
assert(bufs->head == bufs->cur);
|
|
|
|
buf = &bufs->cur->buf;
|
|
|
|
buf->pos += nv_offset;
|
|
buf->last = buf->pos;
|
|
|
|
/* This call will adjust buf->last to the correct position */
|
|
rv = nghttp2_hd_deflate_hd_bufs(deflater, bufs, frame->nva, frame->nvlen);
|
|
|
|
if (rv == NGHTTP2_ERR_BUFFER_ERROR) {
|
|
rv = NGHTTP2_ERR_HEADER_COMP;
|
|
}
|
|
|
|
buf->pos -= nv_offset;
|
|
|
|
if (rv != 0) {
|
|
return rv;
|
|
}
|
|
|
|
nghttp2_put_uint32be(buf->pos, (uint32_t)frame->promised_stream_id);
|
|
|
|
frame->padlen = 0;
|
|
frame->hd.length = nghttp2_bufs_len(bufs);
|
|
|
|
return frame_pack_headers_shared(bufs, &frame->hd);
|
|
}
|
|
|
|
int nghttp2_frame_unpack_push_promise_payload(nghttp2_push_promise *frame,
|
|
const uint8_t *payload,
|
|
size_t payloadlen _U_) {
|
|
frame->promised_stream_id =
|
|
nghttp2_get_uint32(payload) & NGHTTP2_STREAM_ID_MASK;
|
|
frame->nva = NULL;
|
|
frame->nvlen = 0;
|
|
return 0;
|
|
}
|
|
|
|
int nghttp2_frame_pack_ping(nghttp2_bufs *bufs, nghttp2_ping *frame) {
|
|
nghttp2_buf *buf;
|
|
|
|
assert(bufs->head == bufs->cur);
|
|
|
|
buf = &bufs->head->buf;
|
|
|
|
assert(nghttp2_buf_avail(buf) >= 8);
|
|
|
|
buf->pos -= NGHTTP2_FRAME_HDLEN;
|
|
|
|
nghttp2_frame_pack_frame_hd(buf->pos, &frame->hd);
|
|
|
|
buf->last =
|
|
nghttp2_cpymem(buf->last, frame->opaque_data, sizeof(frame->opaque_data));
|
|
|
|
return 0;
|
|
}
|
|
|
|
void nghttp2_frame_unpack_ping_payload(nghttp2_ping *frame,
|
|
const uint8_t *payload,
|
|
size_t payloadlen _U_) {
|
|
memcpy(frame->opaque_data, payload, sizeof(frame->opaque_data));
|
|
}
|
|
|
|
int nghttp2_frame_pack_goaway(nghttp2_bufs *bufs, nghttp2_goaway *frame) {
|
|
int rv;
|
|
nghttp2_buf *buf;
|
|
|
|
assert(bufs->head == bufs->cur);
|
|
|
|
buf = &bufs->head->buf;
|
|
|
|
buf->pos -= NGHTTP2_FRAME_HDLEN;
|
|
|
|
nghttp2_frame_pack_frame_hd(buf->pos, &frame->hd);
|
|
|
|
nghttp2_put_uint32be(buf->last, (uint32_t)frame->last_stream_id);
|
|
buf->last += 4;
|
|
|
|
nghttp2_put_uint32be(buf->last, frame->error_code);
|
|
buf->last += 4;
|
|
|
|
rv = nghttp2_bufs_add(bufs, frame->opaque_data, frame->opaque_data_len);
|
|
|
|
if (rv == NGHTTP2_ERR_BUFFER_ERROR) {
|
|
return NGHTTP2_ERR_FRAME_SIZE_ERROR;
|
|
}
|
|
|
|
if (rv != 0) {
|
|
return rv;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void nghttp2_frame_unpack_goaway_payload(nghttp2_goaway *frame,
|
|
const uint8_t *payload,
|
|
size_t payloadlen _U_,
|
|
uint8_t *var_gift_payload,
|
|
size_t var_gift_payloadlen) {
|
|
frame->last_stream_id = nghttp2_get_uint32(payload) & NGHTTP2_STREAM_ID_MASK;
|
|
frame->error_code = nghttp2_get_uint32(payload + 4);
|
|
|
|
frame->opaque_data = var_gift_payload;
|
|
frame->opaque_data_len = var_gift_payloadlen;
|
|
}
|
|
|
|
int nghttp2_frame_unpack_goaway_payload2(nghttp2_goaway *frame,
|
|
const uint8_t *payload,
|
|
size_t payloadlen, nghttp2_mem *mem) {
|
|
uint8_t *var_gift_payload;
|
|
size_t var_gift_payloadlen;
|
|
|
|
if (payloadlen > 8) {
|
|
var_gift_payloadlen = payloadlen - 8;
|
|
} else {
|
|
var_gift_payloadlen = 0;
|
|
}
|
|
|
|
payloadlen -= var_gift_payloadlen;
|
|
|
|
if (!var_gift_payloadlen) {
|
|
var_gift_payload = NULL;
|
|
} else {
|
|
var_gift_payload = nghttp2_mem_malloc(mem, var_gift_payloadlen);
|
|
|
|
if (var_gift_payload == NULL) {
|
|
return NGHTTP2_ERR_NOMEM;
|
|
}
|
|
|
|
memcpy(var_gift_payload, payload + 8, var_gift_payloadlen);
|
|
}
|
|
|
|
nghttp2_frame_unpack_goaway_payload(frame, payload, payloadlen,
|
|
var_gift_payload, var_gift_payloadlen);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int nghttp2_frame_pack_window_update(nghttp2_bufs *bufs,
|
|
nghttp2_window_update *frame) {
|
|
nghttp2_buf *buf;
|
|
|
|
assert(bufs->head == bufs->cur);
|
|
|
|
buf = &bufs->head->buf;
|
|
|
|
assert(nghttp2_buf_avail(buf) >= 4);
|
|
|
|
buf->pos -= NGHTTP2_FRAME_HDLEN;
|
|
|
|
nghttp2_frame_pack_frame_hd(buf->pos, &frame->hd);
|
|
|
|
nghttp2_put_uint32be(buf->last, (uint32_t)frame->window_size_increment);
|
|
buf->last += 4;
|
|
|
|
return 0;
|
|
}
|
|
|
|
void nghttp2_frame_unpack_window_update_payload(nghttp2_window_update *frame,
|
|
const uint8_t *payload,
|
|
size_t payloadlen _U_) {
|
|
frame->window_size_increment =
|
|
nghttp2_get_uint32(payload) & NGHTTP2_WINDOW_SIZE_INCREMENT_MASK;
|
|
}
|
|
|
|
int nghttp2_frame_pack_altsvc(nghttp2_bufs *bufs, nghttp2_extension *frame) {
|
|
int rv;
|
|
nghttp2_buf *buf;
|
|
nghttp2_ext_altsvc *altsvc;
|
|
|
|
altsvc = frame->payload;
|
|
|
|
buf = &bufs->head->buf;
|
|
|
|
assert(nghttp2_buf_avail(buf) >=
|
|
2 + altsvc->origin_len + altsvc->field_value_len);
|
|
|
|
buf->pos -= NGHTTP2_FRAME_HDLEN;
|
|
|
|
nghttp2_frame_pack_frame_hd(buf->pos, &frame->hd);
|
|
|
|
nghttp2_put_uint16be(buf->last, (uint16_t)altsvc->origin_len);
|
|
buf->last += 2;
|
|
|
|
rv = nghttp2_bufs_add(bufs, altsvc->origin, altsvc->origin_len);
|
|
|
|
assert(rv == 0);
|
|
|
|
rv = nghttp2_bufs_add(bufs, altsvc->field_value, altsvc->field_value_len);
|
|
|
|
assert(rv == 0);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void nghttp2_frame_unpack_altsvc_payload(nghttp2_extension *frame,
|
|
size_t origin_len, uint8_t *payload,
|
|
size_t payloadlen) {
|
|
nghttp2_ext_altsvc *altsvc;
|
|
uint8_t *p;
|
|
|
|
altsvc = frame->payload;
|
|
p = payload;
|
|
|
|
altsvc->origin = p;
|
|
|
|
p += origin_len;
|
|
|
|
altsvc->origin_len = origin_len;
|
|
|
|
altsvc->field_value = p;
|
|
altsvc->field_value_len = (size_t)(payload + payloadlen - p);
|
|
}
|
|
|
|
int nghttp2_frame_unpack_altsvc_payload2(nghttp2_extension *frame,
|
|
const uint8_t *payload,
|
|
size_t payloadlen, nghttp2_mem *mem) {
|
|
uint8_t *buf;
|
|
size_t origin_len;
|
|
|
|
if (payloadlen < 2) {
|
|
return NGHTTP2_FRAME_SIZE_ERROR;
|
|
}
|
|
|
|
origin_len = nghttp2_get_uint16(payload);
|
|
|
|
buf = nghttp2_mem_malloc(mem, payloadlen - 2);
|
|
if (!buf) {
|
|
return NGHTTP2_ERR_NOMEM;
|
|
}
|
|
|
|
nghttp2_cpymem(buf, payload + 2, payloadlen - 2);
|
|
|
|
nghttp2_frame_unpack_altsvc_payload(frame, origin_len, buf, payloadlen - 2);
|
|
|
|
return 0;
|
|
}
|
|
|
|
nghttp2_settings_entry *nghttp2_frame_iv_copy(const nghttp2_settings_entry *iv,
|
|
size_t niv, nghttp2_mem *mem) {
|
|
nghttp2_settings_entry *iv_copy;
|
|
size_t len = niv * sizeof(nghttp2_settings_entry);
|
|
|
|
if (len == 0) {
|
|
return NULL;
|
|
}
|
|
|
|
iv_copy = nghttp2_mem_malloc(mem, len);
|
|
|
|
if (iv_copy == NULL) {
|
|
return NULL;
|
|
}
|
|
|
|
memcpy(iv_copy, iv, len);
|
|
|
|
return iv_copy;
|
|
}
|
|
|
|
int nghttp2_nv_equal(const nghttp2_nv *a, const nghttp2_nv *b) {
|
|
return a->namelen == b->namelen && a->valuelen == b->valuelen &&
|
|
memcmp(a->name, b->name, a->namelen) == 0 &&
|
|
memcmp(a->value, b->value, a->valuelen) == 0;
|
|
}
|
|
|
|
void nghttp2_nv_array_del(nghttp2_nv *nva, nghttp2_mem *mem) {
|
|
nghttp2_mem_free(mem, nva);
|
|
}
|
|
|
|
static int bytes_compar(const uint8_t *a, size_t alen, const uint8_t *b,
|
|
size_t blen) {
|
|
int rv;
|
|
|
|
if (alen == blen) {
|
|
return memcmp(a, b, alen);
|
|
}
|
|
|
|
if (alen < blen) {
|
|
rv = memcmp(a, b, alen);
|
|
|
|
if (rv == 0) {
|
|
return -1;
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
rv = memcmp(a, b, blen);
|
|
|
|
if (rv == 0) {
|
|
return 1;
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
int nghttp2_nv_compare_name(const nghttp2_nv *lhs, const nghttp2_nv *rhs) {
|
|
return bytes_compar(lhs->name, lhs->namelen, rhs->name, rhs->namelen);
|
|
}
|
|
|
|
static int nv_compar(const void *lhs, const void *rhs) {
|
|
const nghttp2_nv *a = (const nghttp2_nv *)lhs;
|
|
const nghttp2_nv *b = (const nghttp2_nv *)rhs;
|
|
int rv;
|
|
|
|
rv = bytes_compar(a->name, a->namelen, b->name, b->namelen);
|
|
|
|
if (rv == 0) {
|
|
return bytes_compar(a->value, a->valuelen, b->value, b->valuelen);
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
void nghttp2_nv_array_sort(nghttp2_nv *nva, size_t nvlen) {
|
|
qsort(nva, nvlen, sizeof(nghttp2_nv), nv_compar);
|
|
}
|
|
|
|
int nghttp2_nv_array_copy(nghttp2_nv **nva_ptr, const nghttp2_nv *nva,
|
|
size_t nvlen, nghttp2_mem *mem) {
|
|
size_t i;
|
|
uint8_t *data = NULL;
|
|
size_t buflen = 0;
|
|
nghttp2_nv *p;
|
|
|
|
if (nvlen == 0) {
|
|
*nva_ptr = NULL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
for (i = 0; i < nvlen; ++i) {
|
|
/* + 1 for null-termination */
|
|
if ((nva[i].flags & NGHTTP2_NV_FLAG_NO_COPY_NAME) == 0) {
|
|
buflen += nva[i].namelen + 1;
|
|
}
|
|
if ((nva[i].flags & NGHTTP2_NV_FLAG_NO_COPY_VALUE) == 0) {
|
|
buflen += nva[i].valuelen + 1;
|
|
}
|
|
}
|
|
|
|
buflen += sizeof(nghttp2_nv) * nvlen;
|
|
|
|
*nva_ptr = nghttp2_mem_malloc(mem, buflen);
|
|
|
|
if (*nva_ptr == NULL) {
|
|
return NGHTTP2_ERR_NOMEM;
|
|
}
|
|
|
|
p = *nva_ptr;
|
|
data = (uint8_t *)(*nva_ptr) + sizeof(nghttp2_nv) * nvlen;
|
|
|
|
for (i = 0; i < nvlen; ++i) {
|
|
p->flags = nva[i].flags;
|
|
|
|
if (nva[i].flags & NGHTTP2_NV_FLAG_NO_COPY_NAME) {
|
|
p->name = nva[i].name;
|
|
p->namelen = nva[i].namelen;
|
|
} else {
|
|
memcpy(data, nva[i].name, nva[i].namelen);
|
|
p->name = data;
|
|
p->namelen = nva[i].namelen;
|
|
data[p->namelen] = '\0';
|
|
nghttp2_downcase(p->name, p->namelen);
|
|
data += nva[i].namelen + 1;
|
|
}
|
|
|
|
if (nva[i].flags & NGHTTP2_NV_FLAG_NO_COPY_VALUE) {
|
|
p->value = nva[i].value;
|
|
p->valuelen = nva[i].valuelen;
|
|
} else {
|
|
memcpy(data, nva[i].value, nva[i].valuelen);
|
|
p->value = data;
|
|
p->valuelen = nva[i].valuelen;
|
|
data[p->valuelen] = '\0';
|
|
data += nva[i].valuelen + 1;
|
|
}
|
|
|
|
++p;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int nghttp2_iv_check(const nghttp2_settings_entry *iv, size_t niv) {
|
|
size_t i;
|
|
for (i = 0; i < niv; ++i) {
|
|
switch (iv[i].settings_id) {
|
|
case NGHTTP2_SETTINGS_HEADER_TABLE_SIZE:
|
|
break;
|
|
case NGHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS:
|
|
break;
|
|
case NGHTTP2_SETTINGS_ENABLE_PUSH:
|
|
if (iv[i].value != 0 && iv[i].value != 1) {
|
|
return 0;
|
|
}
|
|
break;
|
|
case NGHTTP2_SETTINGS_INITIAL_WINDOW_SIZE:
|
|
if (iv[i].value > (uint32_t)NGHTTP2_MAX_WINDOW_SIZE) {
|
|
return 0;
|
|
}
|
|
break;
|
|
case NGHTTP2_SETTINGS_MAX_FRAME_SIZE:
|
|
if (iv[i].value < NGHTTP2_MAX_FRAME_SIZE_MIN ||
|
|
iv[i].value > NGHTTP2_MAX_FRAME_SIZE_MAX) {
|
|
return 0;
|
|
}
|
|
break;
|
|
case NGHTTP2_SETTINGS_MAX_HEADER_LIST_SIZE:
|
|
break;
|
|
}
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
static void frame_set_pad(nghttp2_buf *buf, size_t padlen, int framehd_only) {
|
|
size_t trail_padlen;
|
|
size_t newlen;
|
|
|
|
DEBUGF(fprintf(stderr, "send: padlen=%zu, shift left 1 bytes\n", padlen));
|
|
|
|
memmove(buf->pos - 1, buf->pos, NGHTTP2_FRAME_HDLEN);
|
|
|
|
--buf->pos;
|
|
|
|
buf->pos[4] |= NGHTTP2_FLAG_PADDED;
|
|
|
|
newlen = (nghttp2_get_uint32(buf->pos) >> 8) + padlen;
|
|
nghttp2_put_uint32be(buf->pos, (uint32_t)((newlen << 8) + buf->pos[3]));
|
|
|
|
if (framehd_only) {
|
|
return;
|
|
}
|
|
|
|
trail_padlen = padlen - 1;
|
|
buf->pos[NGHTTP2_FRAME_HDLEN] = (uint8_t)trail_padlen;
|
|
|
|
/* zero out padding */
|
|
memset(buf->last, 0, trail_padlen);
|
|
/* extend buffers trail_padlen bytes, since we ate previous padlen -
|
|
trail_padlen byte(s) */
|
|
buf->last += trail_padlen;
|
|
}
|
|
|
|
int nghttp2_frame_add_pad(nghttp2_bufs *bufs, nghttp2_frame_hd *hd,
|
|
size_t padlen, int framehd_only) {
|
|
nghttp2_buf *buf;
|
|
|
|
if (padlen == 0) {
|
|
DEBUGF(fprintf(stderr, "send: padlen = 0, nothing to do\n"));
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* We have arranged bufs like this:
|
|
*
|
|
* 0 1 2 3
|
|
* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
* | |Frame header | Frame payload... :
|
|
* +-+-----------------+-------------------------------------------+
|
|
* | |Frame header | Frame payload... :
|
|
* +-+-----------------+-------------------------------------------+
|
|
* | |Frame header | Frame payload... :
|
|
* +-+-----------------+-------------------------------------------+
|
|
*
|
|
* We arranged padding so that it is included in the first frame
|
|
* completely. For padded frame, we are going to adjust buf->pos of
|
|
* frame which includes padding and serialize (memmove) frame header
|
|
* in the correct position. Also extends buf->last to include
|
|
* padding.
|
|
*/
|
|
|
|
buf = &bufs->head->buf;
|
|
|
|
assert(nghttp2_buf_avail(buf) >= padlen - 1);
|
|
|
|
frame_set_pad(buf, padlen, framehd_only);
|
|
|
|
hd->length += padlen;
|
|
hd->flags |= NGHTTP2_FLAG_PADDED;
|
|
|
|
DEBUGF(fprintf(stderr, "send: final payloadlen=%zu, padlen=%zu\n", hd->length,
|
|
padlen));
|
|
|
|
return 0;
|
|
}
|