Stream: UDP proxy.

src/os/unix/ngx_darwin_init.c

@@ -23,6 +23,7 @@ static ngx_os_io_t ngx_darwin_io = {
     ngx_readv_chain,
     ngx_udp_unix_recv,
     ngx_unix_send,
+    ngx_udp_unix_send,
 #if (NGX_HAVE_SENDFILE)
     ngx_darwin_sendfile_chain,
     NGX_IO_SENDFILE

src/os/unix/ngx_freebsd_init.c

@@ -32,6 +32,7 @@ static ngx_os_io_t ngx_freebsd_io = {
     ngx_readv_chain,
     ngx_udp_unix_recv,
     ngx_unix_send,
+    ngx_udp_unix_send,
 #if (NGX_HAVE_SENDFILE)
     ngx_freebsd_sendfile_chain,
     NGX_IO_SENDFILE

src/os/unix/ngx_linux_init.c

@@ -18,6 +18,7 @@ static ngx_os_io_t ngx_linux_io = {
     ngx_readv_chain,
     ngx_udp_unix_recv,
     ngx_unix_send,
+    ngx_udp_unix_send,
 #if (NGX_HAVE_SENDFILE)
     ngx_linux_sendfile_chain,
     NGX_IO_SENDFILE

src/os/unix/ngx_os.h

@@ -28,6 +28,7 @@ typedef struct {
     ngx_recv_chain_pt  recv_chain;
     ngx_recv_pt        udp_recv;
     ngx_send_pt        send;
+    ngx_send_pt        udp_send;
     ngx_send_chain_pt  send_chain;
     ngx_uint_t         flags;
 } ngx_os_io_t;
@@ -47,6 +48,7 @@ ssize_t ngx_udp_unix_recv(ngx_connection_t *c, u_char *buf, size_t size);
 ssize_t ngx_unix_send(ngx_connection_t *c, u_char *buf, size_t size);
 ngx_chain_t *ngx_writev_chain(ngx_connection_t *c, ngx_chain_t *in,
     off_t limit);
+ssize_t ngx_udp_unix_send(ngx_connection_t *c, u_char *buf, size_t size);
 
 
 #if (IOV_MAX > 64)

src/os/unix/ngx_posix_init.c

@@ -24,6 +24,7 @@ ngx_os_io_t ngx_os_io = {
     ngx_readv_chain,
     ngx_udp_unix_recv,
     ngx_unix_send,
+    ngx_udp_unix_send,
     ngx_writev_chain,
     0
 };

src/os/unix/ngx_solaris_init.c

@@ -19,6 +19,7 @@ static ngx_os_io_t ngx_solaris_io = {
     ngx_readv_chain,
     ngx_udp_unix_recv,
     ngx_unix_send,
+    ngx_udp_unix_send,
 #if (NGX_HAVE_SENDFILE)
     ngx_solaris_sendfilev_chain,
     NGX_IO_SENDFILE

src/os/unix/ngx_udp_send.c

@@ -0,0 +1,56 @@
+
+/*
+ * Copyright (C) Igor Sysoev
+ * Copyright (C) Nginx, Inc.
+ */
+
+
+#include <ngx_config.h>
+#include <ngx_core.h>
+#include <ngx_event.h>
+
+
+ssize_t
+ngx_udp_unix_send(ngx_connection_t *c, u_char *buf, size_t size)
+{
+    ssize_t       n;
+    ngx_err_t     err;
+    ngx_event_t  *wev;
+
+    wev = c->write;
+
+    for ( ;; ) {
+        n = sendto(c->fd, buf, size, 0, c->sockaddr, c->socklen);
+
+        ngx_log_debug4(NGX_LOG_DEBUG_EVENT, c->log, 0,
+                       "sendto: fd:%d %z of %uz to \"%V\"",
+                       c->fd, n, size, &c->addr_text);
+
+        if (n >= 0) {
+            if ((size_t) n != size) {
+                wev->error = 1;
+                (void) ngx_connection_error(c, 0, "sendto() incomplete");
+                return NGX_ERROR;
+            }
+
+            c->sent += n;
+
+            return n;
+        }
+
+        err = ngx_socket_errno;
+
+        if (err == NGX_EAGAIN) {
+            wev->ready = 0;
+            ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, NGX_EAGAIN,
+                           "sendto() not ready");
+            return NGX_AGAIN;
+        }
+
+        if (err != NGX_EINTR) {
+            wev->error = 1;
+            (void) ngx_connection_error(c, err, "sendto() failed");
+            return NGX_ERROR;
+        }
+    }
+}