/*
* libwebsockets - small server side websockets and web server implementation
*
- * Copyright (C) 2010-201
4 Andy Green <andy@warmcat.com>
+ * Copyright (C) 2010-201
5 Andy Green <andy@warmcat.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
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_ctx(wsi),
- wsi->u.ws.frame_masking_nonce_04, 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);
+ 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;
}
int lws_issue_raw(struct lws *wsi, unsigned char *buf, size_t len)
{
- struct lws_context *context = lws_get_ctx(wsi);
+ struct lws_context *context = lws_get_context(wsi);
size_t real_len = len;
int n, m;
if (!len)
return 0;
/* just ignore sends after we cleared the truncation buffer */
- if (wsi->state == WSI_STATE_FLUSHING_STORED_SEND_BEFORE_CLOSE &&
- !wsi->truncated_send_len)
+ if (wsi->state == LWSS_FLUSHING_STORED_SEND_BEFORE_CLOSE &&
+ !wsi->trunc_len)
return len;
- if (wsi->truncated_send_len && (buf < wsi->truncated_send_malloc ||
- buf > (wsi->truncated_send_malloc + wsi->truncated_send_len +
- wsi->truncated_send_offset))) {
+ if (wsi->trunc_len && (buf < wsi->trunc_alloc ||
+ buf > (wsi->trunc_alloc + wsi->trunc_len +
+ wsi->trunc_offset))) {
lwsl_err("****** %x Sending new, pending truncated ...\n", wsi);
assert(0);
}
- m = lws_ext_callback_for_each_active(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 */ {
/* nope, send it on the socket directly */
lws_latency_pre(context, wsi);
n = lws_ssl_capable_write(wsi, buf, len);
- lws_latency(context, wsi, "send lws_issue_raw", n, (unsigned int)n == len);
+ lws_latency(context, wsi, "send lws_issue_raw", n,
+ (unsigned int)n == len);
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;
/*
* we were already handling a truncated send?
*/
- if (wsi->truncated_send_len) {
- lwsl_info("***** %x partial send moved on by %d (vs %d)\n",
- wsi, n, real_len);
- wsi->truncated_send_offset += n;
- wsi->truncated_send_len -= n;
+ if (wsi->trunc_len) {
+ lwsl_info("%p partial adv %d (vs %d)\n", wsi, n, real_len);
+ wsi->trunc_offset += n;
+ wsi->trunc_len -= n;
- if (!wsi->truncated_send_len) {
+ if (!wsi->trunc_len) {
lwsl_info("***** %x partial send completed\n", wsi);
/* done with it, but don't free it */
n = real_len;
- if (wsi->state == WSI_STATE_FLUSHING_STORED_SEND_BEFORE_CLOSE) {
+ if (wsi->state == LWSS_FLUSHING_STORED_SEND_BEFORE_CLOSE) {
lwsl_info("***** %x signalling to close now\n", wsi);
return -1; /* retry closing now */
}
/* 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)
*/
- lwsl_info("***** %x new partial sent %d from %d total\n",
- wsi, n, real_len);
+ lwsl_info("%p new partial sent %d from %d total\n", wsi, n, real_len);
/*
* - if we still have a suitable malloc lying around, use it
* - or, if too small, reallocate it
* - or, if no buffer, create it
*/
- if (!wsi->truncated_send_malloc ||
- real_len - n > wsi->truncated_send_allocation) {
- lws_free(wsi->truncated_send_malloc);
+ if (!wsi->trunc_alloc || real_len - n > wsi->trunc_alloc_len) {
+ lws_free(wsi->trunc_alloc);
- wsi->truncated_send_allocation = real_len - n;
- wsi->truncated_send_malloc = lws_malloc(real_len - n);
- if (!wsi->truncated_send_malloc) {
+ wsi->trunc_alloc_len = real_len - n;
+ wsi->trunc_alloc = lws_malloc(real_len - n);
+ if (!wsi->trunc_alloc) {
lwsl_err("truncated send: unable to malloc %d\n",
real_len - n);
return -1;
}
}
- wsi->truncated_send_offset = 0;
- wsi->truncated_send_len = real_len - n;
- memcpy(wsi->truncated_send_malloc, buf + n, real_len - n);
+ wsi->trunc_offset = 0;
+ wsi->trunc_len = real_len - n;
+ memcpy(wsi->trunc_alloc, buf + n, real_len - n);
/* since something buffered, force it to get another chance to send */
lws_callback_on_writable(wsi);
* @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
- * and an additional LWS_SEND_BUFFER_POST_PADDING bytes valid
- * in the buffer after (buf + len). This is so the protocol
- * header and trailer data can be added in-situ.
+ * 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
* of LWS_WRITE_BINARY or LWS_WRITE_TEXT to send appropriate
* 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 == LWS_CONNMODE_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 post = 0, pre = 0, n;
+ int pre = 0, n;
size_t orig_len = len;
- if (len == 0 && protocol != LWS_WRITE_CLOSE &&
- protocol != LWS_WRITE_PING && protocol != LWS_WRITE_PONG) {
- lwsl_warn("zero length lws_write attempt\n");
- return 0;
+ 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 (protocol == LWS_WRITE_HTTP ||
- protocol == LWS_WRITE_HTTP_FINAL ||
- protocol == LWS_WRITE_HTTP_HEADERS)
+ 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 != WSI_STATE_ESTABLISHED &&
- !(wsi->state == WSI_STATE_RETURNED_CLOSE_ALREADY &&
- protocol == LWS_WRITE_CLOSE))
- return -1;
+ if (wsi->state != LWSS_ESTABLISHED &&
+ ((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 (protocol) {
+ switch ((int)wp) {
case LWS_WRITE_PING:
case LWS_WRITE_PONG:
case LWS_WRITE_CLOSE:
break;
default:
- if (lws_ext_callback_for_each_active(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 = LWS_WS_OPCODE_07__TEXT_FRAME;
+ n = LWSWSOPC_TEXT_FRAME;
break;
case LWS_WRITE_BINARY:
- n = LWS_WS_OPCODE_07__BINARY_FRAME;
+ n = LWSWSOPC_BINARY_FRAME;
break;
case LWS_WRITE_CONTINUATION:
- n = LWS_WS_OPCODE_07__CONTINUATION;
+ n = LWSWSOPC_CONTINUATION;
break;
case LWS_WRITE_CLOSE:
- n = LWS_WS_OPCODE_07__CLOSE;
-
- /*
- * 06+ has a 2-byte status code in network order
- * we can do this because we demand post-buf
- */
-
- if (wsi->u.ws.close_reason) {
- /* reason codes count as data bytes */
- buf[0] = (unsigned char)(wsi->u.ws.close_reason >> 8);
- buf[1] = (unsigned char)wsi->u.ws.close_reason;
- len += 2;
- }
+ n = LWSWSOPC_CLOSE;
break;
case LWS_WRITE_PING:
- n = LWS_WS_OPCODE_07__PING;
+ n = LWSWSOPC_PING;
break;
case LWS_WRITE_PONG:
- n = LWS_WS_OPCODE_07__PONG;
+ 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 == LWS_CONNMODE_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.frame_masking_nonce_04[
- (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.frame_masking_nonce_04, 4);
+ memcpy(dropmask, wsi->u.ws.mask, 4);
}
}
send_raw:
- switch (protocol) {
+ switch ((int)wp) {
case LWS_WRITE_CLOSE:
-/* lwsl_hexdump(&buf[-pre], len + post); */
+/* lwsl_hexdump(&buf[-pre], len); */
case LWS_WRITE_HTTP:
case LWS_WRITE_HTTP_FINAL:
case LWS_WRITE_HTTP_HEADERS:
case LWS_WRITE_PONG:
case LWS_WRITE_PING:
#ifdef LWS_USE_HTTP2
- if (wsi->mode == LWS_CONNMODE_HTTP2_SERVING) {
+ if (wsi->mode == LWSCM_HTTP2_SERVING) {
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) && wsi->u.http.content_length) {
+ 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);
+ 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;
}
- return lws_http2_frame_write(wsi, n, flags, wsi->u.http2.my_stream_id, len, buf);
+ return lws_http2_frame_write(wsi, n, flags,
+ wsi->u.http2.my_stream_id, len, buf);
}
#endif
- return lws_issue_raw(wsi, (unsigned char *)buf - pre,
- len + pre + post);
+ return lws_issue_raw(wsi, (unsigned char *)buf - pre, len + pre);
default:
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
* return to the user code how much OF THE USER BUFFER was consumed.
*/
- n = lws_issue_raw_ext_access(wsi, buf - pre, len + pre + post);
+ n = lws_issue_raw_ext_access(wsi, buf - pre, len + pre);
+ wsi->u.ws.inside_frame = 1;
if (n <= 0)
return n;
- if (n == (int)len + pre + post) {
+ if (n == (int)len + pre) {
/* everything in the buffer was handled (or rebuffered...) */
wsi->u.ws.inside_frame = 0;
return orig_len;
* later.
*/
- return n - (pre + post);
+ return n - pre;
}
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;
while (!lws_send_pipe_choked(wsi)) {
-
- if (wsi->truncated_send_len) {
- if (lws_issue_raw(wsi, wsi->truncated_send_malloc +
- wsi->truncated_send_offset,
- wsi->truncated_send_len) < 0) {
+ if (wsi->trunc_len) {
+ if (lws_issue_raw(wsi, wsi->trunc_alloc +
+ wsi->trunc_offset,
+ wsi->trunc_len) < 0) {
lwsl_info("%s: closing\n", __func__);
return -1;
}
goto all_sent;
if (lws_plat_file_read(wsi, wsi->u.http.fd, &amount,
- context->service_buffer,
- sizeof(context->service_buffer)) < 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->service_buffer, 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 (m != n)
/* adjust for what was not sent */
- if (lws_plat_file_seek_cur(wsi,
- wsi->u.http.fd,
+ if (lws_plat_file_seek_cur(wsi, wsi->u.http.fd,
m - n) ==
(unsigned long)-1)
return -1;
}
all_sent:
- if (!wsi->truncated_send_len &&
- wsi->u.http.filepos == wsi->u.http.filelen) {
- wsi->state = WSI_STATE_HTTP;
+ if (!wsi->trunc_len && wsi->u.http.filepos == wsi->u.http.filelen) {
+ wsi->state = LWSS_HTTP;
/* we might be in keepalive, so close it off here */
lws_plat_file_close(wsi, wsi->u.http.fd);
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