/*
* libwebsockets - small server side websockets and web server implementation
*
- * Copyright (C) 2010-201
3 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
#include "private-libwebsockets.h"
-#ifdef WIN32
-#include <io.h>
-#endif
-
static int
-libwebsocket_0405_frame_mask_generate(struct libwebsocket *wsi)
+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 = libwebsockets_get_random(wsi->protocol->owning_server,
- 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;
}
#ifdef _DEBUG
-void lwsl_hexdump(void *vbuf, size_t len)
+LWS_VISIBLE void lwsl_hexdump(void *vbuf, size_t len)
{
- int n;
- int m;
- int start;
unsigned char *buf = (unsigned char *)vbuf;
+ unsigned int n, m, start;
char line[80];
char *p;
#endif
-int lws_issue_raw(struct libwebsocket *wsi, unsigned char *buf, size_t len)
+/*
+ * notice this returns number of bytes consumed, or -1
+ */
+
+int lws_issue_raw(struct lws *wsi, unsigned char *buf, size_t len)
{
- int n;
-#ifndef LWS_NO_EXTENSIONS
- int m;
+ struct lws_context *context = lws_get_context(wsi);
+ size_t real_len = len;
+ int n, m;
- /*
- * one of the extensions is carrying our data itself? Like mux?
- */
+ 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))) {
+ lwsl_err("****** %x Sending new, pending truncated ...\n", wsi);
+ assert(0);
+ }
- for (n = 0; n < wsi->count_active_extensions; n++) {
- /*
- * there can only be active extensions after handshake completed
- * so we can rely on protocol being set already in here
- */
- m = wsi->active_extensions[n]->callback(
- wsi->protocol->owning_server,
- wsi->active_extensions[n], wsi,
- LWS_EXT_CALLBACK_PACKET_TX_DO_SEND,
- wsi->active_extensions_user[n], &buf, len);
- if (m < 0) {
- lwsl_ext("Extension reports fatal error\n");
- return -1;
- }
- if (m) /* handled */ {
-/* lwsl_ext("ext sent it\n"); */
- return 0;
- }
+ 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;
}
-#endif
- if (!wsi->sock)
- lwsl_warn("** error 0 sock but expected to send\n");
- /*
- * nope, send it on the socket directly
- */
+ if (!lws_socket_is_valid(wsi->sock))
+ lwsl_warn("** error invalid sock but expected to send\n");
-#if 0
- lwsl_debug(" TX: ");
- lws_hexdump(buf, len);
-#endif
+ /* 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);
-#ifdef LWS_OPENSSL_SUPPORT
- if (wsi->ssl) {
- n = SSL_write(wsi->ssl, buf, len);
- if (n < 0) {
- lwsl_debug("ERROR writing to socket\n");
- return -1;
- }
- } else {
-#endif
- n = send(wsi->sock, buf, len, MSG_NOSIGNAL);
- if (n != len) {
- lwsl_debug("ERROR writing len %d to socket %d\n", len, n);
- return -1;
- }
-#ifdef LWS_OPENSSL_SUPPORT
+ 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;
}
-#endif
- return 0;
-}
-
-#ifdef LWS_NO_EXTENSIONS
-int
-lws_issue_raw_ext_access(struct libwebsocket *wsi,
- unsigned char *buf, size_t len)
-{
- return lws_issue_raw(wsi, buf, len);
-}
-#else
-int
-lws_issue_raw_ext_access(struct libwebsocket *wsi,
- unsigned char *buf, size_t len)
-{
- int ret;
- struct lws_tokens eff_buf;
- int m;
- int n;
-
- eff_buf.token = (char *)buf;
- eff_buf.token_len = len;
+handle_truncated_send:
/*
- * while we have original buf to spill ourselves, or extensions report
- * more in their pipeline
+ * we were already handling a truncated send?
*/
-
- ret = 1;
- while (ret == 1) {
-
- /* default to nobody has more to spill */
-
- ret = 0;
-
- /* show every extension the new incoming data */
-
- for (n = 0; n < wsi->count_active_extensions; n++) {
- m = wsi->active_extensions[n]->callback(
- wsi->protocol->owning_server,
- wsi->active_extensions[n], wsi,
- LWS_EXT_CALLBACK_PACKET_TX_PRESEND,
- wsi->active_extensions_user[n], &eff_buf, 0);
- if (m < 0) {
- lwsl_ext("Extension: fatal error\n");
- return -1;
+ 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->trunc_len) {
+ lwsl_info("***** %x 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("***** %x signalling to close now\n", wsi);
+ return -1; /* retry closing now */
}
- if (m)
- /*
- * at least one extension told us he has more
- * to spill, so we will go around again after
- */
- ret = 1;
}
+ /* always callback on writeable */
+ lws_callback_on_writable(wsi);
- /* assuming they left us something to send, send it */
-
- if (eff_buf.token_len)
- if (lws_issue_raw(wsi, (unsigned char *)eff_buf.token,
- eff_buf.token_len))
- return -1;
-
- lwsl_parser("written %d bytes to client\n", eff_buf.token_len);
-
- /* no extension has more to spill */
-
- if (!ret)
- break;
-
- /* we used up what we had */
-
- eff_buf.token = NULL;
- eff_buf.token_len = 0;
-
- /*
- * Did that leave the pipe choked?
- */
+ return n;
+ }
- if (!lws_send_pipe_choked(wsi))
- /* no we could add more */
- continue;
+ if ((unsigned int)n == real_len)
+ /* what we just sent went out cleanly */
+ return n;
- lwsl_debug("choked\n");
+ /*
+ * Newly truncated send. Buffer the remainder (it will get
+ * first priority next time the socket is writable)
+ */
+ lwsl_info("%p new partial sent %d from %d total\n", wsi, n, real_len);
- /*
- * Yes, he's choked. Don't spill the rest now get a callback
- * when he is ready to send and take care of it there
- */
- libwebsocket_callback_on_writable(
- wsi->protocol->owning_server, wsi);
- wsi->extension_data_pending = 1;
- ret = 0;
+ /*
+ * - 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);
+ if (!wsi->trunc_alloc) {
+ lwsl_err("truncated send: unable to malloc %d\n",
+ real_len - n);
+ return -1;
+ }
}
+ wsi->trunc_offset = 0;
+ wsi->trunc_len = real_len - n;
+ memcpy(wsi->trunc_alloc, buf + n, real_len - n);
- return 0;
+ /* since something buffered, force it to get another chance to send */
+ lws_callback_on_writable(wsi);
+
+ return real_len;
}
-#endif
/**
- * libwebsocket_write() - Apply protocol then write data to client
+ * lws_write() - Apply protocol then write data to client
* @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
* valid storage before and after buf as explained above. This scheme
* allows maximum efficiency of sending data and protocol in a single
* packet while not burdening the user code with any protocol knowledge.
+ *
+ * Return may be -1 for a fatal error needing connection close, or a
+ * positive number reflecting the amount of bytes actually sent. This
+ * can be less than the requested number of bytes due to OS memory
+ * pressure at any given time.
*/
-int libwebsocket_write(struct libwebsocket *wsi, unsigned char *buf,
- size_t len, enum libwebsocket_write_protocol protocol)
+LWS_VISIBLE int lws_write(struct lws *wsi, unsigned char *buf, size_t len,
+ enum lws_write_protocol wp)
{
- int n;
- int pre = 0;
- int post = 0;
- int masked7 = wsi->mode == LWS_CONNMODE_WS_CLIENT;
- unsigned char *dropmask = NULL;
+ 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;
-#ifndef LWS_NO_EXTENSIONS
+ unsigned char *dropmask = NULL;
struct lws_tokens eff_buf;
- int m;
-#endif
+ int pre = 0, n;
+ size_t orig_len = 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;
+ 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;
- if (len == 0 && protocol != LWS_WRITE_CLOSE) {
- lwsl_warn("zero length libwebsocket_write attempt\n");
- return 0;
+ lwsl_ext("FORCED draining wp to 0x%02X\n", wp);
}
- if (protocol == LWS_WRITE_HTTP)
+ 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)
- 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) {
+ lwsl_debug("INSIDE FRAME\n");
+ goto do_more_inside_frame;
+ }
-#ifndef LWS_NO_EXTENSIONS
- /* give a change to the extensions to modify payload */
+ 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 (protocol) {
+ switch ((int)wp) {
case LWS_WRITE_PING:
case LWS_WRITE_PONG:
case LWS_WRITE_CLOSE:
break;
default:
+ n = lws_ext_cb_active(wsi, LWS_EXT_CB_PAYLOAD_TX, &eff_buf, wp);
+ if (n < 0)
+ return -1;
- for (n = 0; n < wsi->count_active_extensions; n++) {
- m = wsi->active_extensions[n]->callback(
- wsi->protocol->owning_server,
- wsi->active_extensions[n], wsi,
- LWS_EXT_CALLBACK_PAYLOAD_TX,
- wsi->active_extensions_user[n], &eff_buf, 0);
- if (m < 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;
}
}
+ /*
+ * 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 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;
-#endif
switch (wsi->ietf_spec_revision) {
case 13:
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 -= 2;
- buf[0] = wsi->u.ws.close_reason >> 8;
- buf[1] = wsi->u.ws.close_reason;
- len += 2;
- }
+ n = LWSWSOPC_CLOSE;
break;
case LWS_WRITE_PING:
- n = LWS_WS_OPCODE_07__PING;
- wsi->u.ws.pings_vs_pongs++;
+ n = LWSWSOPC_PING;
break;
case LWS_WRITE_PONG:
- n = LWS_WS_OPCODE_07__PONG;
+ n = LWSWSOPC_PONG;
break;
default:
- lwsl_warn("libwebsocket_write: unknown write "
- "opcode / 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) {
pre += 2;
buf[-pre] = n;
- buf[-pre + 1] = len | is_masked_bit;
+ 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] = len >> 8;
- buf[-pre + 3] = len;
+ buf[-pre + 2] = (unsigned char)(len >> 8);
+ buf[-pre + 3] = (unsigned char)len;
} else {
pre += 10;
buf[-pre] = n;
buf[-pre + 4] = 0;
buf[-pre + 5] = 0;
#endif
- buf[-pre + 6] = len >> 24;
- buf[-pre + 7] = len >> 16;
- buf[-pre + 8] = len >> 8;
- buf[-pre + 9] = len;
+ 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 protocol demands it
+ * the wp demands it
*/
- if (wsi->mode == LWS_CONNMODE_WS_CLIENT) {
-
- if (libwebsocket_0405_frame_mask_generate(wsi)) {
- lwsl_err("libwebsocket_write: "
- "frame mask generation failed\n");
- return 1;
- }
+ 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
*/
- 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];
+ 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];
- if (dropmask)
/* 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:
-
-#if 0
- lwsl_debug("send %ld: ", len + post);
- lwsl_hexdump(&buf[-pre], len + post);
-#endif
-
- 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:
- if (lws_issue_raw(wsi, (unsigned char *)buf - pre,
- len + pre + post))
- return -1;
+#ifdef LWS_USE_HTTP2
+ if (wsi->mode == LWSCM_HTTP2_SERVING) {
+ unsigned char flags = 0;
+
+ n = LWS_HTTP2_FRAME_TYPE_DATA;
+ 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;
+ }
- return 0;
+ 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__);
+ wp = LWS_WRITE_HTTP_FINAL;
+ }
+ }
+
+ 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);
+ }
+#endif
+ return lws_issue_raw(wsi, (unsigned char *)buf - pre, len + pre);
default:
break;
}
* 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.
*/
- return 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) {
+ /* everything in the buffer was handled (or rebuffered...) */
+ wsi->u.ws.inside_frame = 0;
+ return orig_len;
+ }
-/**
- * libwebsockets_serve_http_file() - Send a file back to the client using http
- * @context: libwebsockets context
- * @wsi: Websocket instance (available from user callback)
- * @file: The file to issue over http
- * @content_type: The http content type, eg, text/html
- *
- * This function is intended to be called from the callback in response
- * to http requests from the client. It allows the callback to issue
- * local files down the http link in a single step.
- */
+ /*
+ * 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.
+ */
-int libwebsockets_serve_http_file(struct libwebsocket_context *context,
- struct libwebsocket *wsi, const char *file,
- const char *content_type)
+ return n - pre;
+}
+
+LWS_VISIBLE int lws_serve_http_file_fragment(struct lws *wsi)
{
- int fd;
- struct stat stat_buf;
- char buf[1400];
- char *p = buf;
+ struct lws_context *context = wsi->context;
+ struct lws_context_per_thread *pt = &context->pt[(int)wsi->tsi];
+ unsigned long amount;
int n, m;
- strncpy(wsi->u.http.filepath, file, sizeof wsi->u.http.filepath);
- wsi->u.http.filepath[sizeof(wsi->u.http.filepath) - 1] = '\0';
-
-#ifdef WIN32
- fd = open(wsi->u.http.filepath, O_RDONLY | _O_BINARY);
-#else
- fd = open(wsi->u.http.filepath, O_RDONLY);
-#endif
- if (fd < 1) {
- p += sprintf(p, "HTTP/1.0 400 Bad\x0d\x0a"
- "Server: libwebsockets\x0d\x0a"
- "\x0d\x0a"
- );
- libwebsocket_write(wsi, (unsigned char *)buf, p - buf,
- LWS_WRITE_HTTP);
-
- return -1;
- }
-
- fstat(fd, &stat_buf);
- wsi->u.http.filelen = stat_buf.st_size;
- p += sprintf(p, "HTTP/1.0 200 OK\x0d\x0a"
- "Server: libwebsockets\x0d\x0a"
- "Content-Type: %s\x0d\x0a"
- "Content-Length: %u\x0d\x0a"
- "\x0d\x0a", content_type,
- (unsigned int)stat_buf.st_size);
-
- n = libwebsocket_write(wsi, (unsigned char *)buf, p - buf, LWS_WRITE_HTTP);
- if (n) {
- close(fd);
- return n;
- }
-
- wsi->u.http.filepos = 0;
- wsi->state = WSI_STATE_HTTP_ISSUING_FILE;
-
while (!lws_send_pipe_choked(wsi)) {
-
- n = read(fd, buf, sizeof buf);
- if (n > 0) {
- wsi->u.http.filepos += n;
- m = libwebsocket_write(wsi, (unsigned char *)buf, n, LWS_WRITE_HTTP);
- if (m) {
- close(fd);
- return m;
+ 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;
}
+ continue;
}
- if (n < 0) {
- close(fd);
- return -1;
- }
+ if (wsi->u.http.filepos == wsi->u.http.filelen)
+ goto all_sent;
- if (n < sizeof(buf) || wsi->u.http.filepos == wsi->u.http.filelen) {
- /* oh, we were able to finish here! */
- wsi->state = WSI_STATE_HTTP;
- close(fd);
+ if (lws_plat_file_read(wsi, wsi->u.http.fd, &amount,
+ pt->serv_buf,
+ LWS_MAX_SOCKET_IO_BUF) < 0)
+ return -1; /* caller will close */
- if (wsi->protocol->callback(context, wsi, LWS_CALLBACK_HTTP_FILE_COMPLETION, wsi->user_space,
- wsi->u.http.filepath, wsi->u.http.filepos)) {
- lwsl_info("closing connecton after file_completion returned nonzero\n");
- libwebsocket_close_and_free_session(context, wsi, LWS_CLOSE_STATUS_NOSTATUS);
- }
+ n = (int)amount;
+ if (n) {
+ lws_set_timeout(wsi, PENDING_TIMEOUT_HTTP_CONTENT,
+ context->timeout_secs);
+ wsi->u.http.filepos += 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)
+ return -1;
- return 0;
+ if (m != n)
+ /* adjust for what was not sent */
+ if (lws_plat_file_seek_cur(wsi, wsi->u.http.fd,
+ m - n) ==
+ (unsigned long)-1)
+ return -1;
+ }
+all_sent:
+ 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);
+ wsi->u.http.fd = LWS_INVALID_FILE;
+
+ if (wsi->protocol->callback)
+ /* ignore callback returned value */
+ 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 */
}
}
- /* we choked, no worries schedule service for the rest of it */
-
- libwebsocket_callback_on_writable(context, wsi);
+ lwsl_info("choked before able to send whole file (post)\n");
+ lws_callback_on_writable(wsi);
- close(fd);
-
- return 0;
+ return 0; /* indicates further processing must be done */
}
-int libwebsockets_serve_http_file_fragment(struct libwebsocket_context *context,
- struct libwebsocket *wsi)
+#if LWS_POSIX
+LWS_VISIBLE int
+lws_ssl_capable_read_no_ssl(struct lws *wsi, unsigned char *buf, int len)
{
- int fd;
- int ret = 0;
- char buf[1400];
int n;
-#ifdef WIN32
- fd = open(wsi->u.http.filepath, O_RDONLY | _O_BINARY);
-#else
- fd = open(wsi->u.http.filepath, O_RDONLY);
+ n = recv(wsi->sock, (char *)buf, len, 0);
+ if (n >= 0)
+ 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
- if (fd < 1)
- return -1;
+ lwsl_warn("error on reading from skt\n");
+ return LWS_SSL_CAPABLE_ERROR;
+}
- lseek(fd, wsi->u.http.filepos, SEEK_SET);
+LWS_VISIBLE int
+lws_ssl_capable_write_no_ssl(struct lws *wsi, unsigned char *buf, int len)
+{
+ int n = 0;
- while (!lws_send_pipe_choked(wsi)) {
- n = read(fd, buf, sizeof buf);
- if (n > 0) {
- libwebsocket_write(wsi, (unsigned char *)buf, n, LWS_WRITE_HTTP);
- wsi->u.http.filepos += n;
- }
+#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;
- if (n < 0) {
- close(fd);
- return -1;
- }
+ if (LWS_ERRNO == LWS_EAGAIN ||
+ LWS_ERRNO == LWS_EWOULDBLOCK ||
+ LWS_ERRNO == LWS_EINTR) {
+ if (LWS_ERRNO == LWS_EWOULDBLOCK)
+ lws_set_blocking_send(wsi);
- if (n < sizeof(buf) || wsi->u.http.filepos == wsi->u.http.filelen) {
- wsi->state = WSI_STATE_HTTP;
- close(fd);
- return 0;
- }
+ return LWS_SSL_CAPABLE_MORE_SERVICE;
}
+#else
+ (void)n;
+ (void)wsi;
+ (void)buf;
+ (void)len;
+ // !!!
+#endif
- libwebsocket_callback_on_writable(context, wsi);
-
- close(fd);
-
- return ret;
+ 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
+LWS_VISIBLE int
+lws_ssl_pending_no_ssl(struct lws *wsi)
+{
+ (void)wsi;
+ return 0;
}
-
-
projects / platform / upstream / libwebsockets.git / blobdiff