Mercurial > hg > nginx-quic
view src/os/win32/ngx_wsarecv_chain.c @ 8651:7189cb2b4c5d
Version bump.
author | Roman Arutyunyan <arut@nginx.com> |
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date | Tue, 14 Sep 2021 12:12:02 +0300 |
parents | ecf2a9002b37 |
children | 56819a9491fe |
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/* * Copyright (C) Igor Sysoev * Copyright (C) Nginx, Inc. */ #include <ngx_config.h> #include <ngx_core.h> #include <ngx_event.h> #define NGX_WSABUFS 64 ssize_t ngx_wsarecv_chain(ngx_connection_t *c, ngx_chain_t *chain, off_t limit) { int rc; u_char *prev; u_long bytes, flags; size_t n, size; ngx_err_t err; ngx_array_t vec; ngx_event_t *rev; LPWSABUF wsabuf; WSABUF wsabufs[NGX_WSABUFS]; prev = NULL; wsabuf = NULL; flags = 0; size = 0; bytes = 0; vec.elts = wsabufs; vec.nelts = 0; vec.size = sizeof(WSABUF); vec.nalloc = NGX_WSABUFS; vec.pool = c->pool; /* coalesce the neighbouring bufs */ while (chain) { n = chain->buf->end - chain->buf->last; if (limit) { if (size >= (size_t) limit) { break; } if (size + n > (size_t) limit) { n = (size_t) limit - size; } } if (prev == chain->buf->last) { wsabuf->len += n; } else { if (vec.nelts == vec.nalloc) { break; } wsabuf = ngx_array_push(&vec); if (wsabuf == NULL) { return NGX_ERROR; } wsabuf->buf = (char *) chain->buf->last; wsabuf->len = n; } size += n; prev = chain->buf->end; chain = chain->next; } ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0, "WSARecv: %d:%d", vec.nelts, wsabuf->len); rc = WSARecv(c->fd, vec.elts, vec.nelts, &bytes, &flags, NULL, NULL); rev = c->read; if (rc == -1) { rev->ready = 0; err = ngx_socket_errno; if (err == WSAEWOULDBLOCK) { ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, err, "WSARecv() not ready"); return NGX_AGAIN; } rev->error = 1; ngx_connection_error(c, err, "WSARecv() failed"); return NGX_ERROR; } #if (NGX_HAVE_FIONREAD) if (rev->available >= 0 && bytes > 0) { rev->available -= bytes; /* * negative rev->available means some additional bytes * were received between kernel notification and WSARecv(), * and therefore ev->ready can be safely reset even for * edge-triggered event methods */ if (rev->available < 0) { rev->available = 0; rev->ready = 0; } ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0, "WSARecv: avail:%d", rev->available); } else if (bytes == size) { if (ngx_socket_nread(c->fd, &rev->available) == -1) { rev->error = 1; ngx_connection_error(c, ngx_socket_errno, ngx_socket_nread_n " failed"); return NGX_ERROR; } ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0, "WSARecv: avail:%d", rev->available); } #endif if (bytes < size) { rev->ready = 0; } if (bytes == 0) { rev->eof = 1; } return bytes; }