static int
lws_0405_frame_mask_generate(struct lws *wsi)
{
+#if 0
+ wsi->u.ws.mask[0] = 0;
+ wsi->u.ws.mask[1] = 0;
+ wsi->u.ws.mask[2] = 0;
+ wsi->u.ws.mask[3] = 0;
+#else
int n;
-
/* fetch the per-frame nonce */
- n = lws_get_random(lws_get_context(wsi), wsi->u.ws.mask_nonce, 4);
+ n = lws_get_random(lws_get_context(wsi), wsi->u.ws.mask, 4);
if (n != 4) {
lwsl_parser("Unable to read from random device %s %d\n",
SYSTEM_RANDOM_FILEPATH, n);
return 1;
}
-
+#endif
/* start masking from first byte of masking key buffer */
- wsi->u.ws.frame_mask_index = 0;
+ wsi->u.ws.mask_idx = 0;
return 0;
}
assert(0);
}
- m = lws_ext_cb_wsi_active_exts(wsi,
- LWS_EXT_CALLBACK_PACKET_TX_DO_SEND, &buf, len);
+ m = lws_ext_cb_active(wsi, LWS_EXT_CB_PACKET_TX_DO_SEND, &buf, len);
if (m < 0)
return -1;
if (m) /* handled */ {
switch (n) {
case LWS_SSL_CAPABLE_ERROR:
- lwsl_err("%s: wsi %p: LWS_SSL_CAPABLE_ERROR\n", __func__,
- (void *)wsi);
/* we're going to close, let close know sends aren't possible */
wsi->socket_is_permanently_unusable = 1;
return -1;
/* what we just sent went out cleanly */
return n;
- if (n && wsi->u.ws.clean_buffer)
- /*
- * This buffer unaffected by extension rewriting.
- * It means the user code is expected to deal with
- * partial sends. (lws knows the header was already
- * sent, so on next send will just resume sending
- * payload)
- */
- return n;
-
/*
* Newly truncated send. Buffer the remainder (it will get
* first priority next time the socket is writable)
* @wsi: Websocket instance (available from user callback)
* @buf: The data to send. For data being sent on a websocket
* connection (ie, not default http), this buffer MUST have
- * LWS_SEND_BUFFER_PRE_PADDING bytes valid BEFORE the pointer.
+ * LWS_PRE bytes valid BEFORE the pointer.
* This is so the protocol header data can be added in-situ.
* @len: Count of the data bytes in the payload starting from buf
* @protocol: Use LWS_WRITE_HTTP to reply to an http connection, and one
* pressure at any given time.
*/
-LWS_VISIBLE int lws_write(struct lws *wsi, unsigned char *buf,
- size_t len, enum lws_write_protocol protocol)
+LWS_VISIBLE int lws_write(struct lws *wsi, unsigned char *buf, size_t len,
+ enum lws_write_protocol wp)
{
- int masked7 = wsi->mode == LWSCM_WS_CLIENT;
+ struct lws_context_per_thread *pt = &wsi->context->pt[(int)wsi->tsi];
+ int masked7 = (wsi->mode == LWSCM_WS_CLIENT);
unsigned char is_masked_bit = 0;
unsigned char *dropmask = NULL;
struct lws_tokens eff_buf;
int pre = 0, n;
size_t orig_len = len;
- if (protocol == LWS_WRITE_HTTP ||
- protocol == LWS_WRITE_HTTP_FINAL ||
- protocol == LWS_WRITE_HTTP_HEADERS)
+ if (wsi->state == LWSS_ESTABLISHED && wsi->u.ws.tx_draining_ext) {
+ /* remove us from the list */
+ struct lws **w = &pt->tx_draining_ext_list;
+ lwsl_debug("%s: TX EXT DRAINING: Remove from list\n", __func__);
+ wsi->u.ws.tx_draining_ext = 0;
+ /* remove us from context draining ext list */
+ while (*w) {
+ if (*w == wsi) {
+ *w = wsi->u.ws.tx_draining_ext_list;
+ break;
+ }
+ w = &((*w)->u.ws.tx_draining_ext_list);
+ }
+ wsi->u.ws.tx_draining_ext_list = NULL;
+ wp = (wsi->u.ws.tx_draining_stashed_wp & 0xc0) |
+ LWS_WRITE_CONTINUATION;
+
+ lwsl_ext("FORCED draining wp to 0x%02X\n", wp);
+ }
+
+ if (wp == LWS_WRITE_HTTP ||
+ wp == LWS_WRITE_HTTP_FINAL ||
+ wp == LWS_WRITE_HTTP_HEADERS)
goto send_raw;
- /* websocket protocol, either binary or text */
+ /* if not in a state to send stuff, then just send nothing */
if (wsi->state != LWSS_ESTABLISHED &&
- !(wsi->state == LWSS_RETURNED_CLOSE_ALREADY &&
- protocol == LWS_WRITE_CLOSE))
- return -1;
+ ((wsi->state != LWSS_RETURNED_CLOSE_ALREADY &&
+ wsi->state != LWSS_AWAITING_CLOSE_ACK) ||
+ wp != LWS_WRITE_CLOSE))
+ return 0;
/* if we are continuing a frame that already had its header done */
- if (wsi->u.ws.inside_frame)
+ if (wsi->u.ws.inside_frame) {
+ lwsl_debug("INSIDE FRAME\n");
goto do_more_inside_frame;
+ }
wsi->u.ws.clean_buffer = 1;
/*
* give a chance to the extensions to modify payload
- * pre-TX mangling is not allowed to truncate
+ * the extension may decide to produce unlimited payload erratically
+ * (eg, compression extension), so we require only that if he produces
+ * something, it will be a complete fragment of the length known at
+ * the time (just the fragment length known), and if he has
+ * more we will come back next time he is writeable and allow him to
+ * produce more fragments until he's drained.
+ *
+ * This allows what is sent each time it is writeable to be limited to
+ * a size that can be sent without partial sends or blocking, allows
+ * interleaving of control frames and other connection service.
*/
eff_buf.token = (char *)buf;
eff_buf.token_len = len;
- switch ((int)protocol) {
+ switch ((int)wp) {
case LWS_WRITE_PING:
case LWS_WRITE_PONG:
case LWS_WRITE_CLOSE:
break;
default:
- if (lws_ext_cb_wsi_active_exts(wsi, LWS_EXT_CALLBACK_PAYLOAD_TX,
- &eff_buf, 0) < 0)
+ n = lws_ext_cb_active(wsi, LWS_EXT_CB_PAYLOAD_TX, &eff_buf, wp);
+ if (n < 0)
return -1;
+
+ if (n && eff_buf.token_len) {
+ /* extension requires further draining */
+ wsi->u.ws.tx_draining_ext = 1;
+ wsi->u.ws.tx_draining_ext_list = pt->tx_draining_ext_list;
+ pt->tx_draining_ext_list = wsi;
+ /* we must come back to do more */
+ lws_callback_on_writable(wsi);
+ /*
+ * keep a copy of the write type for the overall
+ * action that has provoked generation of these
+ * fragments, so the last guy can use its FIN state.
+ */
+ wsi->u.ws.tx_draining_stashed_wp = wp;
+ /* this is definitely not actually the last fragment
+ * because the extension asserted he has more coming
+ * So make sure this intermediate one doesn't go out
+ * with a FIN.
+ */
+ wp |= LWS_WRITE_NO_FIN;
+ }
+
+ if (eff_buf.token_len && wsi->u.ws.stashed_write_pending) {
+ wsi->u.ws.stashed_write_pending = 0;
+ wp = (wp &0xc0) | (int)wsi->u.ws.stashed_write_type;
+ }
}
/*
* compression extension, it has already updated its state according
* to this being issued
*/
- if ((char *)buf != eff_buf.token)
+ if ((char *)buf != eff_buf.token) {
+ /*
+ * ext might eat it, but no have anything to issue yet
+ * in that case we have to follow his lead, but stash and
+ * replace the write type that was lost here the first time.
+ */
+ if (len && !eff_buf.token_len) {
+ if (!wsi->u.ws.stashed_write_pending)
+ wsi->u.ws.stashed_write_type = (char)wp & 0x3f;
+ wsi->u.ws.stashed_write_pending = 1;
+ return len;
+ }
/*
* extension recreated it:
* need to buffer this if not all sent
*/
wsi->u.ws.clean_buffer = 0;
+ }
buf = (unsigned char *)eff_buf.token;
len = eff_buf.token_len;
is_masked_bit = 0x80;
}
- switch (protocol & 0xf) {
+ switch (wp & 0xf) {
case LWS_WRITE_TEXT:
n = LWSWSOPC_TEXT_FRAME;
break;
n = LWSWSOPC_PONG;
break;
default:
- lwsl_warn("lws_write: unknown write opc / protocol\n");
+ lwsl_warn("lws_write: unknown write opc / wp\n");
return -1;
}
- if (!(protocol & LWS_WRITE_NO_FIN))
+ if (!(wp & LWS_WRITE_NO_FIN))
n |= 1 << 7;
if (len < 126) {
/*
* Deal with masking if we are in client -> server direction and
- * the protocol demands it
+ * the wp demands it
*/
- if (wsi->mode == LWSCM_WS_CLIENT) {
+ if (masked7) {
if (!wsi->u.ws.inside_frame)
if (lws_0405_frame_mask_generate(wsi)) {
lwsl_err("frame mask generation failed\n");
*/
if (dropmask) { /* never set if already inside frame */
for (n = 4; n < (int)len + 4; n++)
- dropmask[n] = dropmask[n] ^
- wsi->u.ws.mask_nonce[
- (wsi->u.ws.frame_mask_index++) & 3];
+ dropmask[n] = dropmask[n] ^ wsi->u.ws.mask[
+ (wsi->u.ws.mask_idx++) & 3];
/* copy the frame nonce into place */
- memcpy(dropmask, wsi->u.ws.mask_nonce, 4);
+ memcpy(dropmask, wsi->u.ws.mask, 4);
}
}
send_raw:
- switch ((int)protocol) {
+ switch ((int)wp) {
case LWS_WRITE_CLOSE:
/* lwsl_hexdump(&buf[-pre], len); */
case LWS_WRITE_HTTP:
unsigned char flags = 0;
n = LWS_HTTP2_FRAME_TYPE_DATA;
- if (protocol == LWS_WRITE_HTTP_HEADERS) {
+ if (wp == LWS_WRITE_HTTP_HEADERS) {
n = LWS_HTTP2_FRAME_TYPE_HEADERS;
flags = LWS_HTTP2_FLAG_END_HEADERS;
if (wsi->u.http2.send_END_STREAM)
flags |= LWS_HTTP2_FLAG_END_STREAM;
}
- if ((protocol == LWS_WRITE_HTTP ||
- protocol == LWS_WRITE_HTTP_FINAL) &&
+ if ((wp == LWS_WRITE_HTTP ||
+ wp == LWS_WRITE_HTTP_FINAL) &&
wsi->u.http.content_length) {
wsi->u.http.content_remain -= len;
lwsl_info("%s: content_remain = %lu\n", __func__,
wsi->u.http.content_remain);
if (!wsi->u.http.content_remain) {
lwsl_info("%s: selecting final write mode\n", __func__);
- protocol = LWS_WRITE_HTTP_FINAL;
+ wp = LWS_WRITE_HTTP_FINAL;
}
}
- if (protocol == LWS_WRITE_HTTP_FINAL && wsi->u.http2.END_STREAM) {
+ if (wp == LWS_WRITE_HTTP_FINAL && wsi->u.http2.END_STREAM) {
lwsl_info("%s: setting END_STREAM\n", __func__);
flags |= LWS_HTTP2_FLAG_END_STREAM;
}
break;
}
- wsi->u.ws.inside_frame = 1;
-
/*
* give any active extensions a chance to munge the buffer
* before send. We pass in a pointer to an lws_tokens struct
*/
n = lws_issue_raw_ext_access(wsi, buf - pre, len + pre);
+ wsi->u.ws.inside_frame = 1;
if (n <= 0)
return n;
LWS_VISIBLE int lws_serve_http_file_fragment(struct lws *wsi)
{
struct lws_context *context = wsi->context;
+ struct lws_context_per_thread *pt = &context->pt[(int)wsi->tsi];
unsigned long amount;
int n, m;
goto all_sent;
if (lws_plat_file_read(wsi, wsi->u.http.fd, &amount,
- context->serv_buf,
- sizeof(context->serv_buf)) < 0)
+ pt->serv_buf,
+ LWS_MAX_SOCKET_IO_BUF) < 0)
return -1; /* caller will close */
n = (int)amount;
if (n) {
lws_set_timeout(wsi, PENDING_TIMEOUT_HTTP_CONTENT,
- AWAITING_TIMEOUT);
+ context->timeout_secs);
wsi->u.http.filepos += n;
- m = lws_write(wsi, context->serv_buf, n,
+ m = lws_write(wsi, pt->serv_buf, n,
wsi->u.http.filepos == wsi->u.http.filelen ?
LWS_WRITE_HTTP_FINAL : LWS_WRITE_HTTP);
if (m < 0)
if (wsi->protocol->callback)
/* ignore callback returned value */
- user_callback_handle_rxflow(
- wsi->protocol->callback, wsi,
- LWS_CALLBACK_HTTP_FILE_COMPLETION,
- wsi->user_space, NULL, 0);
+ if (user_callback_handle_rxflow(
+ wsi->protocol->callback, wsi,
+ LWS_CALLBACK_HTTP_FILE_COMPLETION,
+ wsi->user_space, NULL, 0) < 0)
+ return -1;
return 1; /* >0 indicates completed */
}
}
#if LWS_POSIX
n = send(wsi->sock, (char *)buf, len, MSG_NOSIGNAL);
+// lwsl_info("%s: sent len %d result %d", __func__, len, n);
if (n >= 0)
return n;
// !!!
#endif
- lwsl_debug("ERROR writing len %d to skt %d\n", len, n);
+ lwsl_debug("ERROR writing len %d to skt fd %d err %d / errno %d\n", len, wsi->sock, n, LWS_ERRNO);
return LWS_SSL_CAPABLE_ERROR;
}
#endif
projects / platform / upstream / libwebsockets.git / blobdiff