600 lines
18 KiB
C
600 lines
18 KiB
C
/*
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* Spdylay - SPDY Library
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*
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* Copyright (c) 2012 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 "spdylay_session.h"
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#include <string.h>
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#include <stddef.h>
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#include <stdio.h>
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#include <assert.h>
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#include <arpa/inet.h>
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#include "spdylay_stream.h"
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#include "spdylay_helper.h"
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int spdylay_outbound_item_compar(const void *lhsx, const void *rhsx)
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{
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const spdylay_outbound_item *lhs, *rhs;
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lhs = (const spdylay_outbound_item*)lhsx;
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rhs = (const spdylay_outbound_item*)rhsx;
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return lhs->pri-rhs->pri;
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}
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int spdylay_session_client_new(spdylay_session **session_ptr,
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const spdylay_session_callbacks *callbacks,
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void *user_data)
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{
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int r;
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*session_ptr = malloc(sizeof(spdylay_session));
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if(*session_ptr == NULL) {
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return SPDYLAY_ERR_NOMEM;
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}
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memset(*session_ptr, 0, sizeof(spdylay_session));
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(*session_ptr)->next_stream_id = 1;
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(*session_ptr)->last_recv_stream_id = 0;
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r = spdylay_zlib_deflate_hd_init(&(*session_ptr)->hd_deflater);
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if(r != 0) {
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free(*session_ptr);
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return r;
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}
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r = spdylay_zlib_inflate_hd_init(&(*session_ptr)->hd_inflater);
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if(r != 0) {
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spdylay_zlib_deflate_free(&(*session_ptr)->hd_deflater);
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free(*session_ptr);
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return r;
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}
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r = spdylay_map_init(&(*session_ptr)->streams);
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if(r != 0) {
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spdylay_zlib_inflate_free(&(*session_ptr)->hd_inflater);
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spdylay_zlib_deflate_free(&(*session_ptr)->hd_deflater);
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free(*session_ptr);
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return r;
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}
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r = spdylay_pq_init(&(*session_ptr)->ob_pq, spdylay_outbound_item_compar);
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if(r != 0) {
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spdylay_map_free(&(*session_ptr)->streams);
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spdylay_zlib_inflate_free(&(*session_ptr)->hd_inflater);
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spdylay_zlib_deflate_free(&(*session_ptr)->hd_deflater);
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free(*session_ptr);
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return r;
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}
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(*session_ptr)->callbacks = *callbacks;
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(*session_ptr)->user_data = user_data;
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(*session_ptr)->ibuf.mark = (*session_ptr)->ibuf.buf;
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(*session_ptr)->ibuf.limit = (*session_ptr)->ibuf.buf;
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(*session_ptr)->iframe.state = SPDYLAY_RECV_HEAD;
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return 0;
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}
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static void spdylay_free_streams(key_type key, void *val)
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{
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spdylay_stream_free((spdylay_stream*)val);
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free(val);
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}
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static void spdylay_outbound_item_free(spdylay_outbound_item *item)
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{
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if(item == NULL) {
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return;
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}
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switch(item->frame_type) {
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case SPDYLAY_SYN_STREAM:
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spdylay_frame_syn_stream_free(&item->frame->syn_stream);
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break;
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}
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free(item->frame);
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}
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void spdylay_session_del(spdylay_session *session)
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{
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spdylay_map_each(&session->streams, spdylay_free_streams);
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spdylay_map_free(&session->streams);
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while(!spdylay_pq_empty(&session->ob_pq)) {
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spdylay_outbound_item *item = (spdylay_outbound_item*)
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spdylay_pq_top(&session->ob_pq);
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spdylay_outbound_item_free(item);
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free(item);
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spdylay_pq_pop(&session->ob_pq);
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}
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spdylay_pq_free(&session->ob_pq);
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spdylay_zlib_deflate_free(&session->hd_deflater);
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spdylay_zlib_inflate_free(&session->hd_inflater);
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free(session->iframe.buf);
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free(session);
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}
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int spdylay_session_add_frame(spdylay_session *session,
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spdylay_frame_type frame_type,
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spdylay_frame *frame)
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{
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int r;
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spdylay_outbound_item *item;
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item = malloc(sizeof(spdylay_outbound_item));
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if(item == NULL) {
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return SPDYLAY_ERR_NOMEM;
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}
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item->frame_type = frame_type;
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item->frame = frame;
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/* TODO Add pri field to SYN_REPLY, DATA frame which copies
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corresponding SYN_STREAM pri. PING frame always pri = 0
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(highest) */
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switch(frame_type) {
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case SPDYLAY_SYN_STREAM:
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item->pri = 4-frame->syn_stream.pri;
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break;
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default:
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item->pri = 4;
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};
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r = spdylay_pq_push(&session->ob_pq, item);
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if(r != 0) {
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free(item);
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return r;
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}
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return 0;
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}
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int spdylay_session_add_rst_stream(spdylay_session *session,
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int32_t stream_id, uint32_t status_code)
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{
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int r;
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spdylay_frame *frame;
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frame = malloc(sizeof(spdylay_frame));
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if(frame == NULL) {
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return SPDYLAY_ERR_NOMEM;
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}
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spdylay_frame_rst_stream_init(&frame->rst_stream, stream_id, status_code);
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r = spdylay_session_add_frame(session, SPDYLAY_RST_STREAM, frame);
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if(r != 0) {
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spdylay_frame_rst_stream_free(&frame->rst_stream);
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free(frame);
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return r;
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}
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return 0;
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}
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int spdylay_session_open_stream(spdylay_session *session, int32_t stream_id)
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{
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int r;
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spdylay_stream *stream = malloc(sizeof(spdylay_stream));
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if(stream == NULL) {
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return SPDYLAY_ERR_NOMEM;
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}
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spdylay_stream_init(stream, stream_id);
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r = spdylay_map_insert(&session->streams, stream_id, stream);
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if(r != 0) {
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free(stream);
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}
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return r;
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}
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ssize_t spdylay_session_prep_frame(spdylay_session *session,
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spdylay_outbound_item *item,
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uint8_t **framebuf_ptr)
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{
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uint8_t *framebuf;
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ssize_t framebuflen;
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int r;
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switch(item->frame_type) {
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case SPDYLAY_SYN_STREAM: {
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item->frame->syn_stream.stream_id = session->next_stream_id;
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session->next_stream_id += 2;
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framebuflen = spdylay_frame_pack_syn_stream(&framebuf,
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&item->frame->syn_stream,
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&session->hd_deflater);
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if(framebuflen < 0) {
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return framebuflen;
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}
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printf("packed %d bytes\n", framebuflen);
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r = spdylay_session_open_stream(session, item->frame->syn_stream.stream_id);
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if(r != 0) {
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free(framebuf);
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return r;
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}
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*framebuf_ptr = framebuf;
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break;
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}
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default:
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framebuflen = SPDYLAY_ERR_INVALID_ARGUMENT;
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}
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return framebuflen;
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}
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static void spdylay_active_outbound_item_reset
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(spdylay_active_outbound_item *aob)
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{
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spdylay_outbound_item_free(aob->item);
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free(aob->item);
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free(aob->framebuf);
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memset(aob, 0, sizeof(spdylay_active_outbound_item));
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}
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int spdylay_session_send(spdylay_session *session)
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{
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printf("session_send\n");
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while(session->aob.item || !spdylay_pq_empty(&session->ob_pq)) {
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const uint8_t *data;
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size_t datalen;
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ssize_t sentlen;
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if(session->aob.item == NULL) {
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spdylay_outbound_item *item = spdylay_pq_top(&session->ob_pq);
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uint8_t *framebuf;
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ssize_t framebuflen;
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spdylay_pq_pop(&session->ob_pq);
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/* TODO Get or validate stream id here */
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framebuflen = spdylay_session_prep_frame(session, item, &framebuf);
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if(framebuflen < 0) {
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/* TODO Call error callback? */
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spdylay_outbound_item_free(item);
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free(item);
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continue;;
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}
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session->aob.item = item;
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session->aob.framebuf = framebuf;
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session->aob.framebuflen = framebuflen;
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}
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data = session->aob.framebuf + session->aob.framebufoff;
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datalen = session->aob.framebuflen - session->aob.framebufoff;
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sentlen = session->callbacks.send_callback(session, data, datalen, 0,
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session->user_data);
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if(sentlen < 0) {
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if(sentlen == SPDYLAY_ERR_WOULDBLOCK) {
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return 0;
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} else {
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return sentlen;
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}
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} else {
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printf("sent %d bytes\n", sentlen);
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session->aob.framebufoff += sentlen;
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if(session->aob.framebufoff == session->aob.framebuflen) {
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/* Frame has completely sent */
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spdylay_active_outbound_item_reset(&session->aob);
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/* TODO If frame is data frame, we need to sent all chunk of
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data.*/
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} else {
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/* partial write */
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break;
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}
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}
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}
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return 0;
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}
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static void spdylay_inbound_buffer_shift(spdylay_inbound_buffer *ibuf)
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{
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ptrdiff_t len = ibuf->limit-ibuf->mark;
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memmove(ibuf->buf, ibuf->mark, len);
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ibuf->limit = ibuf->buf+len;
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ibuf->mark = ibuf->buf;
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}
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static ssize_t spdylay_recv(spdylay_session *session)
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{
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ssize_t r;
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size_t recv_max;
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if(session->ibuf.mark != session->ibuf.buf) {
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spdylay_inbound_buffer_shift(&session->ibuf);
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}
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recv_max = session->ibuf.buf+sizeof(session->ibuf.buf)-session->ibuf.limit;
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r = session->callbacks.recv_callback
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(session, session->ibuf.limit, recv_max, 0, session->user_data);
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if(r > 0) {
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if(r > recv_max) {
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return SPDYLAY_ERR_CALLBACK_FAILURE;
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} else {
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session->ibuf.limit += r;
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}
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} else if(r < 0) {
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if(r != SPDYLAY_ERR_WOULDBLOCK) {
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r = SPDYLAY_ERR_CALLBACK_FAILURE;
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}
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}
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return r;
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}
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static size_t spdylay_inbound_buffer_avail(spdylay_inbound_buffer *ibuf)
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{
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return ibuf->limit-ibuf->mark;
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}
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static void spdylay_inbound_frame_reset(spdylay_inbound_frame *iframe)
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{
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iframe->state = SPDYLAY_RECV_HEAD;
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free(iframe->buf);
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iframe->buf = NULL;
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iframe->len = iframe->off = 0;
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iframe->ign = 0;
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}
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static void spdylay_debug_print_nv(char **nv)
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{
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int i;
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for(i = 0; nv[i]; i += 2) {
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printf("%s: %s\n", nv[i], nv[i+1]);
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}
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}
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static void spdylay_session_call_on_ctrl_frame_received
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(spdylay_session *session, spdylay_frame_type type, spdylay_frame *frame)
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{
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if(session->callbacks.on_ctrl_recv_callback) {
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session->callbacks.on_ctrl_recv_callback
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(session, type, frame, session->user_data);
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}
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}
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/*
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* Checks whether received stream_id is valid.
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* This function returns 1 if it succeeds, or 0.
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*/
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static int spdylay_session_is_new_peer_stream_id(spdylay_session *session,
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int32_t stream_id)
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{
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if(stream_id == 0) {
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return 0;
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}
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if(session->server) {
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return stream_id % 2 == 1 && session->last_recv_stream_id < stream_id;
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} else {
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return stream_id % 2 == 0 && session->last_recv_stream_id < stream_id;
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}
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}
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/*
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* Validates SYN_STREAM frame |frame|. This function returns 0 if it
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* succeeds, or -1.
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*/
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static int spdylay_session_validate_syn_stream(spdylay_session *session,
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spdylay_syn_stream *frame)
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{
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/* TODO Check assoc_stream_id */
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if(spdylay_session_is_new_peer_stream_id(session, frame->stream_id)) {
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return 0;
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} else {
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return -1;
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}
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}
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static spdylay_stream* spdylay_session_get_stream(spdylay_session *session,
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int32_t stream_id)
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{
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return (spdylay_stream*)spdylay_map_find(&session->streams, stream_id);
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}
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/*
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* Validates SYN_REPLY frame |frame|. This function returns 0 if it
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* succeeds, or -1.
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*/
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static int spdylay_session_validate_syn_reply(spdylay_session *session,
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spdylay_syn_reply *frame)
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{
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spdylay_stream *stream;
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stream = spdylay_session_get_stream(session, frame->stream_id);
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if(stream && stream->state == SPDYLAY_STREAM_OPENING) {
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return 0;
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} else {
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return -1;
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}
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}
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static int spdylay_session_handle_invalid_ctrl_frame(spdylay_session *session,
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int32_t stream_id,
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spdylay_frame_type type,
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spdylay_frame *frame)
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{
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int r;
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r = spdylay_session_add_rst_stream(session, stream_id,
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SPDYLAY_PROTOCOL_ERROR);
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if(r != 0) {
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return r;
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}
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if(session->callbacks.on_invalid_ctrl_recv_callback) {
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session->callbacks.on_invalid_ctrl_recv_callback
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(session, type, frame, session->user_data);
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}
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}
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int spdylay_session_process_ctrl_frame(spdylay_session *session)
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{
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int r = 0;
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uint16_t type;
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spdylay_frame frame;
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memcpy(&type, &session->iframe.headbuf[2], sizeof(uint16_t));
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type = ntohs(type);
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switch(type) {
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case SPDYLAY_SYN_STREAM:
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printf("SYN_STREAM\n");
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r = spdylay_frame_unpack_syn_stream(&frame.syn_stream,
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session->iframe.headbuf,
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sizeof(session->iframe.headbuf),
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session->iframe.buf,
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session->iframe.len,
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&session->hd_inflater);
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if(r == 0) {
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r = spdylay_session_validate_syn_stream(session, &frame.syn_stream);
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if(r == 0) {
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spdylay_session_call_on_ctrl_frame_received(session, type, &frame);
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} else {
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r = spdylay_session_handle_invalid_ctrl_frame
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(session, frame.syn_stream.stream_id, type, &frame);
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}
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spdylay_frame_syn_stream_free(&frame.syn_stream);
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} else {
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/* TODO if r indicates mulformed NV pairs (multiple nulls) or
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invalid frame, send RST_STREAM with PROTOCOL_ERROR. Same for
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other control frames. */
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}
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break;
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case SPDYLAY_SYN_REPLY:
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printf("SYN_REPLY\n");
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r = spdylay_frame_unpack_syn_reply(&frame.syn_reply,
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session->iframe.headbuf,
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sizeof(session->iframe.headbuf),
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session->iframe.buf,
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session->iframe.len,
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&session->hd_inflater);
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if(r == 0) {
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r = spdylay_session_validate_syn_reply(session, &frame.syn_reply);
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if(r == 0) {
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spdylay_session_call_on_ctrl_frame_received(session, type, &frame);
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} else {
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r = spdylay_session_handle_invalid_ctrl_frame
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(session, frame.syn_reply.stream_id, type, &frame);
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}
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spdylay_frame_syn_reply_free(&frame.syn_reply);
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}
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break;
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default:
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/* ignore */
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printf("Received control frame type %x\n", type);
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}
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if(r != 0) {
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return r;
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}
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return 0;
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}
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int spdylay_session_process_data_frame(spdylay_session *session)
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{
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printf("Received data frame, stream_id %d, %zu bytes, fin=%d\n",
|
|
spdylay_get_uint32(session->iframe.headbuf),
|
|
session->iframe.len,
|
|
session->iframe.headbuf[4] & SPDYLAY_FLAG_FIN);
|
|
return 0;
|
|
}
|
|
|
|
int spdylay_session_recv(spdylay_session *session)
|
|
{
|
|
printf("session_recv\n");
|
|
while(1) {
|
|
ssize_t r;
|
|
if(session->iframe.state == SPDYLAY_RECV_HEAD) {
|
|
uint32_t payloadlen;
|
|
if(spdylay_inbound_buffer_avail(&session->ibuf) < SPDYLAY_HEAD_LEN) {
|
|
r = spdylay_recv(session);
|
|
printf("r=%d\n", r);
|
|
/* TODO handle EOF */
|
|
if(r < 0) {
|
|
if(r == SPDYLAY_ERR_WOULDBLOCK) {
|
|
return 0;
|
|
} else {
|
|
return r;
|
|
}
|
|
}
|
|
printf("Recved %d bytes\n", r);
|
|
if(spdylay_inbound_buffer_avail(&session->ibuf) < SPDYLAY_HEAD_LEN) {
|
|
return 0;
|
|
}
|
|
}
|
|
session->iframe.state = SPDYLAY_RECV_PAYLOAD;
|
|
payloadlen = spdylay_get_uint32(&session->ibuf.mark[4]) & 0xffffff;
|
|
memcpy(session->iframe.headbuf, session->ibuf.mark, SPDYLAY_HEAD_LEN);
|
|
session->ibuf.mark += SPDYLAY_HEAD_LEN;
|
|
if(spdylay_frame_is_ctrl_frame(session->iframe.headbuf[0])) {
|
|
/* control frame */
|
|
session->iframe.len = payloadlen;
|
|
session->iframe.buf = malloc(session->iframe.len);
|
|
if(session->iframe.buf == NULL) {
|
|
return SPDYLAY_ERR_NOMEM;
|
|
}
|
|
session->iframe.off = 0;
|
|
} else {
|
|
int32_t stream_id;
|
|
/* data frame */
|
|
/* For data frame, We dont' buffer data. Instead, just pass
|
|
received data to callback function. */
|
|
stream_id = spdylay_get_uint32(session->iframe.headbuf) & 0x7fffffff;
|
|
/* TODO validate stream id here */
|
|
session->iframe.len = payloadlen;
|
|
session->iframe.off = 0;
|
|
}
|
|
}
|
|
if(session->iframe.state == SPDYLAY_RECV_PAYLOAD) {
|
|
size_t rempayloadlen = session->iframe.len - session->iframe.off;
|
|
size_t bufavail, readlen;
|
|
if(spdylay_inbound_buffer_avail(&session->ibuf) == 0 &&
|
|
rempayloadlen > 0) {
|
|
r = spdylay_recv(session);
|
|
if(r <= 0) {
|
|
if(r == SPDYLAY_ERR_WOULDBLOCK) {
|
|
return 0;
|
|
} else {
|
|
return r;
|
|
}
|
|
}
|
|
}
|
|
bufavail = spdylay_inbound_buffer_avail(&session->ibuf);
|
|
readlen = bufavail < rempayloadlen ? bufavail : rempayloadlen;
|
|
if(session->iframe.buf != NULL) {
|
|
memcpy(session->iframe.buf, session->ibuf.mark, readlen);
|
|
}
|
|
session->iframe.off += readlen;
|
|
session->ibuf.mark += readlen;
|
|
if(session->iframe.len == session->iframe.off) {
|
|
if(spdylay_frame_is_ctrl_frame(session->iframe.headbuf[0])) {
|
|
spdylay_session_process_ctrl_frame(session);
|
|
} else {
|
|
spdylay_session_process_data_frame(session);
|
|
}
|
|
spdylay_inbound_frame_reset(&session->iframe);
|
|
}
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int spdylay_session_want_read(spdylay_session *session)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
int spdylay_session_want_write(spdylay_session *session)
|
|
{
|
|
return session->aob.item != NULL || !spdylay_pq_empty(&session->ob_pq);
|
|
}
|
|
|
|
int spdylay_req_submit(spdylay_session *session, const char *path)
|
|
{
|
|
int r;
|
|
spdylay_frame *frame;
|
|
char **nv;
|
|
frame = malloc(sizeof(spdylay_frame));
|
|
nv = malloc(9*sizeof(char*));
|
|
nv[0] = strdup("method");
|
|
nv[1] = strdup("GET");
|
|
nv[2] = strdup("scheme");
|
|
nv[3] = strdup("https");
|
|
nv[4] = strdup("url");
|
|
nv[5] = strdup(path);
|
|
nv[6] = strdup("version");
|
|
nv[7] = strdup("HTTP/1.1");
|
|
nv[8] = NULL;
|
|
spdylay_frame_syn_stream_init(&frame->syn_stream,
|
|
SPDYLAY_FLAG_FIN, 0, 0, 0, nv);
|
|
r = spdylay_session_add_frame(session, SPDYLAY_SYN_STREAM, frame);
|
|
assert(r == 0);
|
|
}
|