/* * libwebsockets - small server side websockets and web server implementation * * Copyright (C) 2010-2017 Andy Green * * 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_WAITING_TO_SEND_CLOSE_NOTIFICATION && wsi->state != LWSS_AWAITING_CLOSE_ACK) || wp != LWS_WRITE_CLOSE)) { lwsl_debug("binning\n"); 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: wsi %p: tx_content_remain = %llu\n", __func__, wsi, (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 (poss > wsi->u.http.tx_content_remain) poss = wsi->u.http.tx_content_remain; /* * 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 }