Integrate TLDK with NGINX

Created a clone of nginx (from https://github.com/nginx/nginx)
to demonstrate and benchmark TLDK library integrated with real
world application.
A new nginx module is created and and BSD socket-like API is implemented
on top of native TLDK API.
Note, that right now only minimalistic subset of socket-like API is provided:
- accept
- close
- readv
- recv
- writev
so only limited nginx functionality is available for a moment.

Change-Id: Ie1efe9349a0538da4348a48fb8306cbf636b5a92
Signed-off-by: Mohammad Abdul Awal <mohammad.abdul.awal@intel.com>
Signed-off-by: Reshma Pattan <reshma.pattan@intel.com>
Signed-off-by: Remy Horton <remy.horton@intel.com>
Signed-off-by: Konstantin Ananyev <konstantin.ananyev@intel.com>

1 files changed, 106 insertions, 0 deletions

diff --git a/app/nginx/src/os/win32/ngx_wsarecv_chain.c b/app/nginx/src/os/win32/ngx_wsarecv_chain.c
new file mode 100644
index 0000000..2598e09
--- /dev/null
+++ b/app/nginx/src/os/win32/ngx_wsarecv_chain.c
@@ -0,0 +1,106 @@
+
+/*
+ * Copyright (C) Igor Sysoev
+ * Copyright (C) Nginx, Inc.
+ */
+
+
+#include <ngx_config.h>
+#include <ngx_core.h>
+#include <ngx_event.h>
+
+
+#define NGX_WSABUFS  8
+
+
+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 {
+            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 (bytes < size) {
+        rev->ready = 0;
+    }
+
+    if (bytes == 0) {
+        rev->eof = 1;
+    }
+
+    return bytes;
+}