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virtualx-engine/thirdparty/lws/output.c
Fabio Alessandrelli fa33e0f62d Add libwebsockets as thirdparty library. 
License is LGPLv2.1 + static linking exception, version is 2.4.1
2018-02-05 16:11:41 +01:00

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/*
* libwebsockets - small server side websockets and web server implementation
*
* Copyright (C) 2010-2017 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
* License as published by the Free Software Foundation:
* version 2.1 of the License.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301 USA
*/
#include "private-libwebsockets.h"
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, 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.mask_idx = 0;
return 0;
}
/*
* notice this returns number of bytes consumed, or -1
*/
int lws_issue_raw(struct lws *wsi, unsigned char *buf, size_t len)
{
struct lws_context *context = lws_get_context(wsi);
struct lws_context_per_thread *pt = &wsi->context->pt[(int)wsi->tsi];
size_t real_len = len;
unsigned int n;
int m;
lws_stats_atomic_bump(wsi->context, pt, LWSSTATS_C_API_WRITE, 1);
if (!len)
return 0;
/* just ignore sends after we cleared the truncation buffer */
if (wsi->state == LWSS_FLUSHING_STORED_SEND_BEFORE_CLOSE &&
!wsi->trunc_len)
return len;
if (wsi->trunc_len && (buf < wsi->trunc_alloc ||
buf > (wsi->trunc_alloc + wsi->trunc_len + wsi->trunc_offset))) {
char dump[20];
strncpy(dump, (char *)buf, sizeof(dump) - 1);
dump[sizeof(dump) - 1] = '\0';
#if defined(LWS_WITH_ESP8266)
lwsl_err("****** %p: Sending new %lu (%s), pending truncated ...\n",
wsi, (unsigned long)len, dump);
#else
lwsl_err("****** %p: Sending new %lu (%s), pending truncated ...\n"
" It's illegal to do an lws_write outside of\n"
" the writable callback: fix your code\n",
wsi, (unsigned long)len, dump);
#endif
assert(0);
return -1;
}
m = lws_ext_cb_active(wsi, LWS_EXT_CB_PACKET_TX_DO_SEND, &buf, len);
if (m < 0)
return -1;
if (m) /* handled */ {
n = m;
goto handle_truncated_send;
}
if (!wsi->http2_substream && !lws_socket_is_valid(wsi->desc.sockfd))
lwsl_warn("** error invalid sock but expected to send\n");
/* limit sending */
if (wsi->protocol->tx_packet_size)
n = wsi->protocol->tx_packet_size;
else {
n = wsi->protocol->rx_buffer_size;
if (!n)
n = context->pt_serv_buf_size;
}
n += LWS_PRE + 4;
if (n > len)
n = len;
#if defined(LWS_WITH_ESP8266)
if (wsi->pending_send_completion) {
n = 0;
goto handle_truncated_send;
}
#endif
/* nope, send it on the socket directly */
lws_latency_pre(context, wsi);
n = lws_ssl_capable_write(wsi, buf, n);
lws_latency(context, wsi, "send lws_issue_raw", n, n == len);
switch (n) {
case LWS_SSL_CAPABLE_ERROR:
/* we're going to close, let close know sends aren't possible */
wsi->socket_is_permanently_unusable = 1;
return -1;
case LWS_SSL_CAPABLE_MORE_SERVICE:
/* nothing got sent, not fatal, retry the whole thing later */
n = 0;
break;
}
handle_truncated_send:
/*
* we were already handling a truncated send?
*/
if (wsi->trunc_len) {
lwsl_info("%p partial adv %d (vs %ld)\n", wsi, n, (long)real_len);
wsi->trunc_offset += n;
wsi->trunc_len -= n;
if (!wsi->trunc_len) {
lwsl_info("***** %p partial send completed\n", wsi);
/* done with it, but don't free it */
n = real_len;
if (wsi->state == LWSS_FLUSHING_STORED_SEND_BEFORE_CLOSE) {
lwsl_info("***** %p signalling to close now\n", wsi);
return -1; /* retry closing now */
}
}
/* always callback on writeable */
lws_callback_on_writable(wsi);
return n;
}
if ((unsigned int)n == real_len)
/* what we just sent went out cleanly */
return n;
/*
* Newly truncated send. Buffer the remainder (it will get
* first priority next time the socket is writable)
*/
lwsl_debug("%p new partial sent %d from %lu total\n", wsi, n,
(unsigned long)real_len);
lws_stats_atomic_bump(wsi->context, pt, LWSSTATS_C_WRITE_PARTIALS, 1);
lws_stats_atomic_bump(wsi->context, pt, LWSSTATS_B_PARTIALS_ACCEPTED_PARTS, n);
/*
* - 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->trunc_alloc || real_len - n > wsi->trunc_alloc_len) {
lws_free(wsi->trunc_alloc);
wsi->trunc_alloc_len = real_len - n;
wsi->trunc_alloc = lws_malloc(real_len - n, "truncated send alloc");
if (!wsi->trunc_alloc) {
lwsl_err("truncated send: unable to malloc %lu\n",
(unsigned long)(real_len - n));
return -1;
}
}
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);
return real_len;
}
LWS_VISIBLE int lws_write(struct lws *wsi, unsigned char *buf, size_t len,
enum lws_write_protocol wp)
{
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;
size_t orig_len = len;
int pre = 0, n;
if (wsi->parent_carries_io) {
struct lws_write_passthru pas;
pas.buf = buf;
pas.len = len;
pas.wp = wp;
pas.wsi = wsi;
if (wsi->parent->protocol->callback(wsi->parent,
LWS_CALLBACK_CHILD_WRITE_VIA_PARENT,
wsi->parent->user_space,
(void *)&pas, 0))
return 1;
return len;
}
lws_stats_atomic_bump(wsi->context, pt, LWSSTATS_C_API_LWS_WRITE, 1);
if ((int)len < 0) {
lwsl_err("%s: suspicious len int %d, ulong %lu\n", __func__,
(int)len, (unsigned long)len);
return -1;
}
lws_stats_atomic_bump(wsi->context, pt, LWSSTATS_B_WRITE, len);
#ifdef LWS_WITH_ACCESS_LOG
wsi->access_log.sent += len;
#endif
if (wsi->vhost)
wsi->vhost->conn_stats.tx += len;
if (wsi->state == LWSS_ESTABLISHED && wsi->u.ws.tx_draining_ext) {
/* remove us from the list */
struct lws **w = &pt->tx_draining_ext_list;
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);
}
lws_restart_ws_ping_pong_timer(wsi);
if ((wp & 0x1f) == LWS_WRITE_HTTP ||
(wp & 0x1f) == LWS_WRITE_HTTP_FINAL ||
(wp & 0x1f) == LWS_WRITE_HTTP_HEADERS_CONTINUATION ||
(wp & 0x1f) == LWS_WRITE_HTTP_HEADERS)
goto send_raw;
/* if not in a state to send stuff, then just send nothing */
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) {
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
* 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)wp) {
case LWS_WRITE_PING:
case LWS_WRITE_PONG:
case LWS_WRITE_CLOSE:
break;
default:
lwsl_debug("LWS_EXT_CB_PAYLOAD_TX\n");
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) {
lwsl_debug("drain len %d\n", (int)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;
}
}
/*
* an extension did something we need to keep... for example, if
* compression extension, it has already updated its state according
* to this being issued
*/
if ((char *)buf != eff_buf.token) {
/*
* ext might eat it, but not 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;
if (!buf) {
lwsl_err("null buf (%d)\n", (int)len);
return -1;
}
switch (wsi->ietf_spec_revision) {
case 13:
if (masked7) {
pre += 4;
dropmask = &buf[0 - pre];
is_masked_bit = 0x80;
}
switch (wp & 0xf) {
case LWS_WRITE_TEXT:
n = LWSWSOPC_TEXT_FRAME;
break;
case LWS_WRITE_BINARY:
n = LWSWSOPC_BINARY_FRAME;
break;
case LWS_WRITE_CONTINUATION:
n = LWSWSOPC_CONTINUATION;
break;
case LWS_WRITE_CLOSE:
n = LWSWSOPC_CLOSE;
break;
case LWS_WRITE_PING:
n = LWSWSOPC_PING;
break;
case LWS_WRITE_PONG:
n = LWSWSOPC_PONG;
break;
default:
lwsl_warn("lws_write: unknown write opc / wp\n");
return -1;
}
if (!(wp & LWS_WRITE_NO_FIN))
n |= 1 << 7;
if (len < 126) {
pre += 2;
buf[-pre] = n;
buf[-pre + 1] = (unsigned char)(len | is_masked_bit);
} else {
if (len < 65536) {
pre += 4;
buf[-pre] = n;
buf[-pre + 1] = 126 | is_masked_bit;
buf[-pre + 2] = (unsigned char)(len >> 8);
buf[-pre + 3] = (unsigned char)len;
} else {
pre += 10;
buf[-pre] = n;
buf[-pre + 1] = 127 | is_masked_bit;
#if defined __LP64__
buf[-pre + 2] = (len >> 56) & 0x7f;
buf[-pre + 3] = len >> 48;
buf[-pre + 4] = len >> 40;
buf[-pre + 5] = len >> 32;
#else
buf[-pre + 2] = 0;
buf[-pre + 3] = 0;
buf[-pre + 4] = 0;
buf[-pre + 5] = 0;
#endif
buf[-pre + 6] = (unsigned char)(len >> 24);
buf[-pre + 7] = (unsigned char)(len >> 16);
buf[-pre + 8] = (unsigned char)(len >> 8);
buf[-pre + 9] = (unsigned char)len;
}
}
break;
}
do_more_inside_frame:
/*
* Deal with masking if we are in client -> server direction and
* the wp demands it
*/
if (masked7) {
if (!wsi->u.ws.inside_frame)
if (lws_0405_frame_mask_generate(wsi)) {
lwsl_err("frame mask generation failed\n");
return -1;
}
/*
* in v7, just mask the payload
*/
if (dropmask) { /* never set if already inside frame */
for (n = 4; n < (int)len + 4; n++)
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, 4);
}
}
send_raw:
switch ((int)(wp & 0x1f)) {
case LWS_WRITE_CLOSE:
/* lwsl_hexdump(&buf[-pre], len); */
case LWS_WRITE_HTTP:
case LWS_WRITE_HTTP_FINAL:
case LWS_WRITE_HTTP_HEADERS:
case LWS_WRITE_HTTP_HEADERS_CONTINUATION:
case LWS_WRITE_PONG:
case LWS_WRITE_PING:
#ifdef LWS_WITH_HTTP2
if (wsi->mode == LWSCM_HTTP2_SERVING) {
unsigned char flags = 0;
n = LWS_H2_FRAME_TYPE_DATA;
if ((wp & 0x1f) == LWS_WRITE_HTTP_HEADERS) {
n = LWS_H2_FRAME_TYPE_HEADERS;
if (!(wp & LWS_WRITE_NO_FIN))
flags = LWS_H2_FLAG_END_HEADERS;
if (wsi->u.h2.send_END_STREAM || (wp & LWS_WRITE_H2_STREAM_END)) {
flags |= LWS_H2_FLAG_END_STREAM;
wsi->u.h2.send_END_STREAM = 1;
}
}
if ((wp & 0x1f) == LWS_WRITE_HTTP_HEADERS_CONTINUATION) {
n = LWS_H2_FRAME_TYPE_CONTINUATION;
if (!(wp & LWS_WRITE_NO_FIN))
flags = LWS_H2_FLAG_END_HEADERS;
if (wsi->u.h2.send_END_STREAM || (wp & LWS_WRITE_H2_STREAM_END)) {
flags |= LWS_H2_FLAG_END_STREAM;
wsi->u.h2.send_END_STREAM = 1;
}
}
if (((wp & 0x1f) == LWS_WRITE_HTTP ||
(wp & 0x1f) == LWS_WRITE_HTTP_FINAL) &&
wsi->u.http.tx_content_length) {
wsi->u.http.tx_content_remain -= len;
lwsl_info("%s: content_remain = %llu\n", __func__,
(unsigned long long)wsi->u.http.tx_content_remain);
if (!wsi->u.http.tx_content_remain) {
lwsl_info("%s: selecting final write mode\n", __func__);
wp = LWS_WRITE_HTTP_FINAL;
}
}
if ((wp & 0x1f) == LWS_WRITE_HTTP_FINAL || (wp & LWS_WRITE_H2_STREAM_END)) {
//lws_get_network_wsi(wsi)->u.h2.END_STREAM) {
lwsl_info("%s: setting END_STREAM\n", __func__);
flags |= LWS_H2_FLAG_END_STREAM;
wsi->u.h2.send_END_STREAM = 1;
}
return lws_h2_frame_write(wsi, n, flags,
wsi->u.h2.my_sid, len, buf);
}
#endif
return lws_issue_raw(wsi, (unsigned char *)buf - pre, len + pre);
default:
break;
}
/*
* give any active extensions a chance to munge the buffer
* before send. We pass in a pointer to an lws_tokens struct
* prepared with the default buffer and content length that's in
* there. Rather than rewrite the default buffer, extensions
* that expect to grow the buffer can adapt .token to
* point to their own per-connection buffer in the extension
* user allocation. By default with no extensions or no
* extension callback handling, just the normal input buffer is
* used then so it is efficient.
*
* callback returns 1 in case it wants to spill more buffers
*
* This takes care of holding the buffer if send is incomplete, ie,
* if wsi->u.ws.clean_buffer is 0 (meaning an extension meddled with
* the buffer). If wsi->u.ws.clean_buffer is 1, it will instead
* return to the user code how much OF THE USER BUFFER was consumed.
*/
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) {
/* everything in the buffer was handled (or rebuffered...) */
wsi->u.ws.inside_frame = 0;
return orig_len;
}
/*
* it is how many bytes of user buffer got sent... may be < orig_len
* in which case callback when writable has already been arranged
* and user code can call lws_write() again with the rest
* later.
*/
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];
struct lws_process_html_args args;
lws_filepos_t amount, poss;
unsigned char *p, *pstart;
#if defined(LWS_WITH_RANGES)
unsigned char finished = 0;
#endif
int n, m;
lwsl_debug("wsi->http2_substream %d\n", wsi->http2_substream);
while (!lws_send_pipe_choked(wsi)) {
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__);
goto file_had_it;
}
continue;
}
if (wsi->u.http.filepos == wsi->u.http.filelen)
goto all_sent;
n = 0;
pstart = pt->serv_buf + LWS_H2_FRAME_HEADER_LENGTH;
p = pstart;
#if defined(LWS_WITH_RANGES)
if (wsi->u.http.range.count_ranges && !wsi->u.http.range.inside) {
lwsl_notice("%s: doing range start %llu\n", __func__, wsi->u.http.range.start);
if ((long long)lws_vfs_file_seek_cur(wsi->u.http.fop_fd,
wsi->u.http.range.start -
wsi->u.http.filepos) < 0)
goto file_had_it;
wsi->u.http.filepos = wsi->u.http.range.start;
if (wsi->u.http.range.count_ranges > 1) {
n = lws_snprintf((char *)p, context->pt_serv_buf_size - LWS_H2_FRAME_HEADER_LENGTH,
"_lws\x0d\x0a"
"Content-Type: %s\x0d\x0a"
"Content-Range: bytes %llu-%llu/%llu\x0d\x0a"
"\x0d\x0a",
wsi->u.http.multipart_content_type,
wsi->u.http.range.start,
wsi->u.http.range.end,
wsi->u.http.range.extent);
p += n;
}
wsi->u.http.range.budget = wsi->u.http.range.end -
wsi->u.http.range.start + 1;
wsi->u.http.range.inside = 1;
}
#endif
poss = context->pt_serv_buf_size - n - LWS_H2_FRAME_HEADER_LENGTH;
/*
* if there is a hint about how much we will do well to send at one time,
* restrict ourselves to only trying to send that.
*/
if (wsi->protocol->tx_packet_size &&
poss > wsi->protocol->tx_packet_size)
poss = wsi->protocol->tx_packet_size;
#if defined(LWS_WITH_HTTP2)
m = lws_h2_tx_cr_get(wsi);
if (!m) {
lwsl_info("%s: came here with no tx credit", __func__);
return 0;
}
if (m < poss)
poss = m;
/*
* consumption of the actual payload amount sent will be handled
* when the http2 data frame is sent
*/
#endif
#if defined(LWS_WITH_RANGES)
if (wsi->u.http.range.count_ranges) {
if (wsi->u.http.range.count_ranges > 1)
poss -= 7; /* allow for final boundary */
if (poss > wsi->u.http.range.budget)
poss = wsi->u.http.range.budget;
}
#endif
if (wsi->sending_chunked) {
/* we need to drop the chunk size in here */
p += 10;
/* allow for the chunk to grow by 128 in translation */
poss -= 10 + 128;
}
if (lws_vfs_file_read(wsi->u.http.fop_fd, &amount, p, poss) < 0)
goto file_had_it; /* caller will close */
if (wsi->sending_chunked)
n = (int)amount;
else
n = (p - pstart) + (int)amount;
lwsl_debug("%s: sending %d\n", __func__, n);
if (n) {
lws_set_timeout(wsi, PENDING_TIMEOUT_HTTP_CONTENT,
context->timeout_secs);
if (wsi->sending_chunked) {
args.p = (char *)p;
args.len = n;
args.max_len = (unsigned int)poss + 128;
args.final = wsi->u.http.filepos + n ==
wsi->u.http.filelen;
if (user_callback_handle_rxflow(
wsi->vhost->protocols[(int)wsi->protocol_interpret_idx].callback, wsi,
LWS_CALLBACK_PROCESS_HTML,
wsi->user_space, &args, 0) < 0)
goto file_had_it;
n = args.len;
p = (unsigned char *)args.p;
} else
p = pstart;
#if defined(LWS_WITH_RANGES)
if (wsi->u.http.range.send_ctr + 1 ==
wsi->u.http.range.count_ranges && // last range
wsi->u.http.range.count_ranges > 1 && // was 2+ ranges (ie, multipart)
wsi->u.http.range.budget - amount == 0) {// final part
n += lws_snprintf((char *)pstart + n, 6,
"_lws\x0d\x0a"); // append trailing boundary
lwsl_debug("added trailing boundary\n");
}
#endif
m = lws_write(wsi, p, n,
wsi->u.http.filepos == wsi->u.http.filelen ?
LWS_WRITE_HTTP_FINAL :
LWS_WRITE_HTTP
);
if (m < 0)
goto file_had_it;
wsi->u.http.filepos += amount;
#if defined(LWS_WITH_RANGES)
if (wsi->u.http.range.count_ranges >= 1) {
wsi->u.http.range.budget -= amount;
if (wsi->u.http.range.budget == 0) {
lwsl_notice("range budget exhausted\n");
wsi->u.http.range.inside = 0;
wsi->u.http.range.send_ctr++;
if (lws_ranges_next(&wsi->u.http.range) < 1) {
finished = 1;
goto all_sent;
}
}
}
#endif
if (m != n) {
/* adjust for what was not sent */
if (lws_vfs_file_seek_cur(wsi->u.http.fop_fd,
m - n) ==
(unsigned long)-1)
goto file_had_it;
}
}
all_sent:
if ((!wsi->trunc_len && wsi->u.http.filepos >= wsi->u.http.filelen)
#if defined(LWS_WITH_RANGES)
|| finished)
#else
)
#endif
{
wsi->state = LWSS_HTTP;
/* we might be in keepalive, so close it off here */
lws_vfs_file_close(&wsi->u.http.fop_fd);
lwsl_debug("file completed\n");
if (wsi->protocol->callback &&
user_callback_handle_rxflow(wsi->protocol->callback,
wsi, LWS_CALLBACK_HTTP_FILE_COMPLETION,
wsi->user_space, NULL,
0) < 0) {
/*
* For http/1.x, the choices from
* transaction_completed are either
* 0 to use the connection for pipelined
* or nonzero to hang it up.
*
* However for http/2. while we are
* still interested in hanging up the
* nwsi if there was a network-level
* fatal error, simply completing the
* transaction is a matter of the stream
* state, not the root connection at the
* network level
*/
if (wsi->http2_substream)
return 1;
else
return -1;
}
return 1; /* >0 indicates completed */
}
}
lws_callback_on_writable(wsi);
return 0; /* indicates further processing must be done */
file_had_it:
lws_vfs_file_close(&wsi->u.http.fop_fd);
return -1;
}
#if LWS_POSIX
LWS_VISIBLE int
lws_ssl_capable_read_no_ssl(struct lws *wsi, unsigned char *buf, int len)
{
struct lws_context *context = wsi->context;
struct lws_context_per_thread *pt = &context->pt[(int)wsi->tsi];
int n;
lws_stats_atomic_bump(context, pt, LWSSTATS_C_API_READ, 1);
n = recv(wsi->desc.sockfd, (char *)buf, len, 0);
if (n >= 0) {
if (wsi->vhost)
wsi->vhost->conn_stats.rx += n;
lws_stats_atomic_bump(context, pt, LWSSTATS_B_READ, n);
lws_restart_ws_ping_pong_timer(wsi);
return n;
}
#if LWS_POSIX
if (LWS_ERRNO == LWS_EAGAIN ||
LWS_ERRNO == LWS_EWOULDBLOCK ||
LWS_ERRNO == LWS_EINTR)
return LWS_SSL_CAPABLE_MORE_SERVICE;
#endif
lwsl_notice("error on reading from skt : %d\n", LWS_ERRNO);
return LWS_SSL_CAPABLE_ERROR;
}
LWS_VISIBLE int
lws_ssl_capable_write_no_ssl(struct lws *wsi, unsigned char *buf, int len)
{
int n = 0;
#if LWS_POSIX
n = send(wsi->desc.sockfd, (char *)buf, len, MSG_NOSIGNAL);
// lwsl_info("%s: sent len %d result %d", __func__, len, n);
if (n >= 0)
return n;
if (LWS_ERRNO == LWS_EAGAIN ||
LWS_ERRNO == LWS_EWOULDBLOCK ||
LWS_ERRNO == LWS_EINTR) {
if (LWS_ERRNO == LWS_EWOULDBLOCK) {
lws_set_blocking_send(wsi);
}
return LWS_SSL_CAPABLE_MORE_SERVICE;
}
#else
(void)n;
(void)wsi;
(void)buf;
(void)len;
// !!!
#endif
lwsl_debug("ERROR writing len %d to skt fd %d err %d / errno %d\n",
len, wsi->desc.sockfd, n, LWS_ERRNO);
return LWS_SSL_CAPABLE_ERROR;
}
#endif
LWS_VISIBLE int
lws_ssl_pending_no_ssl(struct lws *wsi)
{
(void)wsi;
#if defined(LWS_WITH_ESP32)
return 100;
#else
return 0;
#endif
}
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