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Added spdylay_session_mem_recv()

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spdylay_session_mem_recv() processes input bytes as the received data
from the remote endpoint. spdylay_session_recv() uses it internally.
The spdylay_inbound_buffer and ibuf member in spdylay_session is removed.
The buffer is allocated in the stack when spdylay_session_recv() is called.
This commit is contained in:
Tatsuhiro Tsujikawa 2012-03-17 23:39:38 +09:00
parent 425a9558d7
commit 742a8bbac9
3 changed files with 104 additions and 96 deletions
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23
lib/includes/spdylay/spdylay.h
View File

@ -1144,6 +1144,29 @@ int spdylay_session_send(spdylay_session *session);
*/
int spdylay_session_recv(spdylay_session *session);
/**
* Processes data |in| as an input from the remote endpoint. The
* |inlen| indicates the number of bytes in the |in|.
*
* This function behaves like `spdylay_session_recv()` except that it
* does not use :member:`spdylay_session_callbacks.recv_callback` to
* receive data; the |in| is the only data for the invocation of this
* function. If all bytes are processed, this function returns. The
* other callbacks are called in the same way as they are in
* `spdylay_session_recv()`.
*
* In the current implementation, this function always tries to
* processes all input data unless an error occurs.
*
* This function returns the number of processed bytes, or one of the
* following negative error codes:
*
* :enum:`SPDYLAY_ERR_NOMEM`
* Out of memory.
*/
ssize_t spdylay_session_mem_recv(spdylay_session *session,
const uint8_t *in, size_t inlen);
/**
* @function
*

163
lib/spdylay_session.c
View File

@ -104,6 +104,13 @@ static int spdylay_outbound_item_compar(const void *lhsx, const void *rhsx)
}
}
static void spdylay_inbound_frame_reset(spdylay_inbound_frame *iframe)
{
iframe->state = SPDYLAY_RECV_HEAD;
iframe->len = iframe->off = 0;
iframe->headbufoff = 0;
}
static int spdylay_session_new(spdylay_session **session_ptr,
uint16_t version,
const spdylay_session_callbacks *callbacks,
@ -190,16 +197,13 @@ static int spdylay_session_new(spdylay_session **session_ptr,
(*session_ptr)->callbacks = *callbacks;
(*session_ptr)->user_data = user_data;
(*session_ptr)->ibuf.mark = (*session_ptr)->ibuf.buf;
(*session_ptr)->ibuf.limit = (*session_ptr)->ibuf.buf;
(*session_ptr)->iframe.state = SPDYLAY_RECV_HEAD;
(*session_ptr)->iframe.buf = malloc(SPDYLAY_INITIAL_INBOUND_FRAMEBUF_LENGTH);
if((*session_ptr)->iframe.buf == NULL) {
r = SPDYLAY_ERR_NOMEM;
goto fail_iframe_buf;
}
(*session_ptr)->iframe.bufmax = SPDYLAY_INITIAL_INBOUND_FRAMEBUF_LENGTH;
spdylay_inbound_frame_reset(&(*session_ptr)->iframe);
return 0;
@ -1280,29 +1284,14 @@ int spdylay_session_send(spdylay_session *session)
return 0;
}
static void spdylay_inbound_buffer_shift(spdylay_inbound_buffer *ibuf)
{
ptrdiff_t len = ibuf->limit-ibuf->mark;
memmove(ibuf->buf, ibuf->mark, len);
ibuf->limit = ibuf->buf+len;
ibuf->mark = ibuf->buf;
}
static ssize_t spdylay_recv(spdylay_session *session)
static ssize_t spdylay_recv(spdylay_session *session, uint8_t *buf, size_t len)
{
ssize_t r;
size_t recv_max;
if(session->ibuf.mark != session->ibuf.buf) {
spdylay_inbound_buffer_shift(&session->ibuf);
}
recv_max = session->ibuf.buf+sizeof(session->ibuf.buf)-session->ibuf.limit;
r = session->callbacks.recv_callback
(session, session->ibuf.limit, recv_max, 0, session->user_data);
(session, buf, len, 0, session->user_data);
if(r > 0) {
if(r > recv_max) {
if(r > len) {
return SPDYLAY_ERR_CALLBACK_FAILURE;
} else {
session->ibuf.limit += r;
}
} else if(r < 0) {
if(r != SPDYLAY_ERR_WOULDBLOCK) {
@ -1312,18 +1301,6 @@ static ssize_t spdylay_recv(spdylay_session *session)
return r;
}
static size_t spdylay_inbound_buffer_avail(spdylay_inbound_buffer *ibuf)
{
return ibuf->limit-ibuf->mark;
}
static void spdylay_inbound_frame_reset(spdylay_inbound_frame *iframe)
{
iframe->state = SPDYLAY_RECV_HEAD;
iframe->len = iframe->off = 0;
iframe->ign = 0;
}
static void spdylay_session_call_on_request_recv
(spdylay_session *session, int32_t stream_id)
{
@ -2049,49 +2026,50 @@ static int spdylay_session_update_recv_window_size(spdylay_session *session,
return 0;
}
int spdylay_session_recv(spdylay_session *session)
ssize_t spdylay_session_mem_recv(spdylay_session *session,
const uint8_t *in, size_t inlen)
{
const uint8_t *inmark, *inlimit;
inmark = in;
inlimit = in+inlen;
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);
/* If EOF is reached, r == SPDYLAY_ERR_EOF */
if(r < 0) {
if(r == SPDYLAY_ERR_WOULDBLOCK) {
return 0;
} else if(r == SPDYLAY_ERR_EOF) {
return r;
} else {
return SPDYLAY_ERR_CALLBACK_FAILURE;
}
}
if(spdylay_inbound_buffer_avail(&session->ibuf) < SPDYLAY_HEAD_LEN) {
return 0;
}
size_t remheadbytes;
size_t readlen;
size_t bufavail = inlimit-inmark;
if(bufavail == 0) {
break;
}
session->iframe.state = SPDYLAY_RECV_PAYLOAD;
payloadlen = spdylay_get_uint32(&session->ibuf.mark[4]) &
SPDYLAY_LENGTH_MASK;
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;
r = spdylay_reserve_buffer(&session->iframe.buf,
&session->iframe.bufmax,
session->iframe.len);
if(r != 0) {
/* FATAL */
assert(r < SPDYLAY_ERR_FATAL);
return r;
remheadbytes = SPDYLAY_HEAD_LEN-session->iframe.headbufoff;
readlen = spdylay_min(remheadbytes, bufavail);
memcpy(session->iframe.headbuf+session->iframe.headbufoff,
inmark, readlen);
inmark += readlen;
session->iframe.headbufoff += readlen;
if(session->iframe.headbufoff == SPDYLAY_HEAD_LEN) {
session->iframe.state = SPDYLAY_RECV_PAYLOAD;
payloadlen = spdylay_get_uint32(&session->iframe.headbuf[4]) &
SPDYLAY_LENGTH_MASK;
if(spdylay_frame_is_ctrl_frame(session->iframe.headbuf[0])) {
/* control frame */
session->iframe.len = payloadlen;
r = spdylay_reserve_buffer(&session->iframe.buf,
&session->iframe.bufmax,
session->iframe.len);
if(r != 0) {
/* FATAL */
assert(r < SPDYLAY_ERR_FATAL);
return r;
}
session->iframe.off = 0;
} else {
session->iframe.len = payloadlen;
session->iframe.off = 0;
}
session->iframe.off = 0;
} else {
/* TODO validate stream id here */
session->iframe.len = payloadlen;
session->iframe.off = 0;
break;
}
}
if(session->iframe.state == SPDYLAY_RECV_PAYLOAD) {
@ -2099,22 +2077,13 @@ int spdylay_session_recv(spdylay_session *session)
size_t bufavail, readlen;
int32_t data_stream_id = 0;
uint8_t data_flags = SPDYLAY_DATA_FLAG_NONE;
if(spdylay_inbound_buffer_avail(&session->ibuf) == 0 &&
rempayloadlen > 0) {
r = spdylay_recv(session);
if(r == 0 || r == SPDYLAY_ERR_WOULDBLOCK) {
return 0;
} else if(r == SPDYLAY_ERR_EOF) {
return r;
} else if(r < 0) {
return SPDYLAY_ERR_CALLBACK_FAILURE;
}
bufavail = inlimit-inmark;
if(rempayloadlen > 0 && bufavail == 0) {
break;
}
bufavail = spdylay_inbound_buffer_avail(&session->ibuf);
readlen = bufavail < rempayloadlen ? bufavail : rempayloadlen;
readlen = spdylay_min(bufavail, rempayloadlen);
if(spdylay_frame_is_ctrl_frame(session->iframe.headbuf[0])) {
memcpy(session->iframe.buf+session->iframe.off,
session->ibuf.mark, readlen);
memcpy(session->iframe.buf+session->iframe.off, inmark, readlen);
} else {
/* For data frame, We don't buffer data. Instead, just pass
received data to callback function. */
@ -2125,13 +2094,13 @@ int spdylay_session_recv(spdylay_session *session)
session->callbacks.on_data_chunk_recv_callback(session,
data_flags,
data_stream_id,
session->ibuf.mark,
inmark,
readlen,
session->user_data);
}
}
session->iframe.off += readlen;
session->ibuf.mark += readlen;
inmark += readlen;
if(session->flow_control &&
!spdylay_frame_is_ctrl_frame(session->iframe.headbuf[0])) {
@ -2163,7 +2132,29 @@ int spdylay_session_recv(spdylay_session *session)
}
}
}
return 0;
return inmark-in;
}
int spdylay_session_recv(spdylay_session *session)
{
uint8_t buf[SPDYLAY_INBOUND_BUFFER_LENGTH];
while(1) {
ssize_t readlen;
readlen = spdylay_recv(session, buf, sizeof(buf));
if(readlen > 0) {
ssize_t proclen = spdylay_session_mem_recv(session, buf, readlen);
if(proclen < 0) {
return proclen;
}
assert(proclen == readlen);
} else if(readlen == 0 || readlen == SPDYLAY_ERR_WOULDBLOCK) {
return 0;
} else if(readlen == SPDYLAY_ERR_EOF) {
return readlen;
} else if(readlen < 0) {
return SPDYLAY_ERR_CALLBACK_FAILURE;
}
}
}
int spdylay_session_want_read(spdylay_session *session)

14
lib/spdylay_session.h
View File

@ -53,8 +53,7 @@ typedef struct {
size_t framebufoff;
} spdylay_active_outbound_item;
/* Buffer length for inbound SPDY frames. Same value for the size of
message block of SSLv3/TLSv1 */
/* Buffer length for inbound raw byte stream. */
#define SPDYLAY_INBOUND_BUFFER_LENGTH 16384
#define SPDYLAY_INITIAL_OUTBOUND_FRAMEBUF_LENGTH (SPDYLAY_DATA_PAYLOAD_LENGTH+8)
@ -64,12 +63,6 @@ typedef struct {
#define SPDYLAY_INITIAL_WINDOW_SIZE 65536
typedef struct {
uint8_t buf[SPDYLAY_INBOUND_BUFFER_LENGTH];
uint8_t *mark;
uint8_t *limit;
} spdylay_inbound_buffer;
typedef enum {
SPDYLAY_RECV_HEAD,
SPDYLAY_RECV_PAYLOAD
@ -84,14 +77,16 @@ typedef enum {
typedef struct {
spdylay_inbound_state state;
uint8_t headbuf[SPDYLAY_HEAD_LEN];
/* How many bytes are filled in headbuf */
size_t headbufoff;
/* Payload for control frames. It is not used for DATA frames */
uint8_t *buf;
/* Capacity of buf */
size_t bufmax;
/* length in Length field */
size_t len;
/* How many bytes are filled in buf */
size_t off;
uint8_t ign;
} spdylay_inbound_frame;
typedef enum {
@ -128,7 +123,6 @@ struct spdylay_session {
spdylay_active_outbound_item aob;
spdylay_inbound_buffer ibuf;
spdylay_inbound_frame iframe;
/* Buffer used to store inflated name/value pairs in wire format