Revert "stream: squelch ECONNRESET error if already closed"

This reverts commit 05a003a.

This commit triggerd "test-tls-hello-parser-failure" failure in io.js.
See the reference below for a more thorough explanation.

Refs: nodejs/node#2310
PR-URL: libuv#475
Reviewed-By: Ben Noordhuis <[email protected]>

Author: saghul

Makefile.am

@@ -224,7 +224,6 @@ test_run_tests_SOURCES = test/blackhole-server.c \
                          test/test-tcp-open.c \
                          test/test-tcp-read-stop.c \
                          test/test-tcp-shutdown-after-write.c \
-                         test/test-tcp-squelch-connreset.c \
                          test/test-tcp-unexpected-read.c \
                          test/test-tcp-oob.c \
                          test/test-tcp-write-to-half-open-connection.c \

src/unix/internal.h

@@ -89,11 +89,10 @@
 #endif
 
 #if defined(__linux__)
-# define UV__POLLIN     UV__EPOLLIN
-# define UV__POLLOUT    UV__EPOLLOUT
-# define UV__POLLERR    UV__EPOLLERR
-# define UV__POLLHUP    UV__EPOLLHUP
-# define UV__POLLRDHUP  UV__EPOLLRDHUP
+# define UV__POLLIN   UV__EPOLLIN
+# define UV__POLLOUT  UV__EPOLLOUT
+# define UV__POLLERR  UV__EPOLLERR
+# define UV__POLLHUP  UV__EPOLLHUP
 #endif
 
 #if defined(__sun) || defined(_AIX)
@@ -119,10 +118,6 @@
 # define UV__POLLHUP  8
 #endif
 
-#ifndef UV__POLLRDHUP
-# define UV__POLLRDHUP  0x200
-#endif
-
 #if !defined(O_CLOEXEC) && defined(__FreeBSD__)
 /*
  * It may be that we are just missing `__POSIX_VISIBLE >= 200809`.
@@ -148,7 +143,6 @@ enum {
   UV_TCP_NODELAY          = 0x400,  /* Disable Nagle. */
   UV_TCP_KEEPALIVE        = 0x800,  /* Turn on keep-alive. */
   UV_TCP_SINGLE_ACCEPT    = 0x1000, /* Only accept() when idle. */
-  UV_STREAM_DISCONNECT    = 0x2000, /* Remote end is forcibly closed */
   UV_HANDLE_IPV6          = 0x10000, /* Handle is bound to a IPv6 socket. */
   UV_UDP_PROCESSING       = 0x20000  /* Handle is running the send callback queue. */
 };

src/unix/kqueue.c

@@ -241,9 +241,6 @@ void uv__io_poll(uv_loop_t* loop, int timeout) {
       if (ev->flags & EV_ERROR)
         revents |= UV__POLLERR;
 
-      if ((w->pevents & UV__POLLIN) && (ev->flags & EV_EOF))
-        revents |= UV__POLLRDHUP;
-
       if (revents == 0)
         continue;
 

src/unix/linux-core.c

@@ -184,8 +184,6 @@ void uv__io_poll(uv_loop_t* loop, int timeout) {
     assert(w->fd < (int) loop->nwatchers);
 
     e.events = w->pevents;
-    if (w->pevents & UV__POLLIN)
-      e.events |= UV__POLLRDHUP;
     e.data = w->fd;
 
     if (w->events == 0)
@@ -323,7 +321,7 @@ void uv__io_poll(uv_loop_t* loop, int timeout) {
        * the current watcher. Also, filters out events that users has not
        * requested us to watch.
        */
-      pe->events &= w->pevents | UV__POLLERR | UV__POLLHUP | UV__POLLRDHUP;
+      pe->events &= w->pevents | UV__POLLERR | UV__POLLHUP;
 
       /* Work around an epoll quirk where it sometimes reports just the
        * EPOLLERR or EPOLLHUP event.  In order to force the event loop to

src/unix/linux-syscalls.h

@@ -76,7 +76,6 @@
 #define UV__EPOLLOUT          4
 #define UV__EPOLLERR          8
 #define UV__EPOLLHUP          16
-#define UV__EPOLLRDHUP        0x2000
 #define UV__EPOLLONESHOT      0x40000000
 #define UV__EPOLLET           0x80000000
 

src/unix/poll.c

@@ -41,7 +41,7 @@ static void uv__poll_io(uv_loop_t* loop, uv__io_t* w, unsigned int events) {
   }
 
   pevents = 0;
-  if (events & (UV__POLLIN | UV__POLLRDHUP))
+  if (events & UV__POLLIN)
     pevents |= UV_READABLE;
   if (events & UV__POLLOUT)
     pevents |= UV_WRITABLE;

src/unix/stream.c

@@ -1129,8 +1129,6 @@ static void uv__read(uv_stream_t* stream) {
           uv__stream_osx_interrupt_select(stream);
         }
         stream->read_cb(stream, 0, &buf);
-      } else if (errno == ECONNRESET && (stream->flags & UV_STREAM_DISCONNECT)) {
-        uv__stream_eof(stream, &buf);
       } else {
         /* Error. User should call uv_close(). */
         stream->read_cb(stream, -errno, &buf);
@@ -1219,11 +1217,8 @@ static void uv__stream_io(uv_loop_t* loop, uv__io_t* w, unsigned int events) {
   assert(uv__stream_fd(stream) >= 0);
 
   /* Ignore POLLHUP here. Even it it's set, there may still be data to read. */
-  if (events & (UV__POLLIN | UV__POLLERR | UV__POLLHUP | UV__POLLRDHUP)) {
-    if (events & UV__POLLRDHUP)
-      stream->flags |= UV_STREAM_DISCONNECT;
+  if (events & (UV__POLLIN | UV__POLLERR | UV__POLLHUP))
     uv__read(stream);
-  }
 
   if (uv__stream_fd(stream) == -1)
     return;  /* read_cb closed stream. */

test/test-list.h

@@ -79,9 +79,6 @@ TEST_DECLARE   (tcp_bind_invalid_flags)
 TEST_DECLARE   (tcp_listen_without_bind)
 TEST_DECLARE   (tcp_connect_error_fault)
 TEST_DECLARE   (tcp_connect_timeout)
-#ifndef _WIN32
-TEST_DECLARE   (tcp_squelch_connreset)
-#endif
 TEST_DECLARE   (tcp_close_while_connecting)
 TEST_DECLARE   (tcp_close)
 TEST_DECLARE   (tcp_create_early)
@@ -427,9 +424,6 @@ TASK_LIST_START
   TEST_ENTRY  (tcp_listen_without_bind)
   TEST_ENTRY  (tcp_connect_error_fault)
   TEST_ENTRY  (tcp_connect_timeout)
-#ifndef _WIN32
-  TEST_ENTRY  (tcp_squelch_connreset)
-#endif
   TEST_ENTRY  (tcp_close_while_connecting)
   TEST_ENTRY  (tcp_close)
   TEST_ENTRY  (tcp_create_early)

test/test-poll.c

@@ -204,15 +204,14 @@ static void connection_poll_cb(uv_poll_t* handle, int status, int events) {
         /* Read a couple of bytes. */
         static char buffer[74];
         r = recv(context->sock, buffer, sizeof buffer, 0);
+        ASSERT(r >= 0);
 
         if (r > 0) {
           context->read += r;
-        } else if (r == 0) {
+        } else {
           /* Got FIN. */
           context->got_fin = 1;
           new_events &= ~UV_READABLE;
-        } else {
-          ASSERT(got_eagain());
         }
 
         break;
@@ -223,6 +222,7 @@ static void connection_poll_cb(uv_poll_t* handle, int status, int events) {
         /* Read until EAGAIN. */
         static char buffer[931];
         r = recv(context->sock, buffer, sizeof buffer, 0);
+        ASSERT(r >= 0);
 
         while (r > 0) {
           context->read += r;

test/test-tcp-open.c

@@ -38,7 +38,6 @@ static uv_connect_t connect_req;
 static uv_shutdown_t shutdown_req;
 static uv_write_t write_req;
 
-static int read_bytes = 0;
 
 static void startup(void) {
 #ifdef _WIN32
@@ -112,15 +111,11 @@ static void read_cb(uv_stream_t* tcp, ssize_t nread, const uv_buf_t* buf) {
   ASSERT(tcp != NULL);
 
   if (nread >= 0) {
-    read_bytes += nread;
-    if (nread > 0) {
-      ASSERT(nread == 4);
-      ASSERT(memcmp("PING", buf->base, nread) == 0);
-    }
+    ASSERT(nread == 4);
+    ASSERT(memcmp("PING", buf->base, nread) == 0);
   }
   else {
     ASSERT(nread == UV_EOF);
-    ASSERT(read_bytes == 4);
     printf("GOT EOF\n");
     uv_close((uv_handle_t*)tcp, close_cb);
   }

test/test-tcp-squelch-connreset.c

@@ -364,7 +364,6 @@
         'test/test-tcp-connect-timeout.c',
         'test/test-tcp-connect6-error.c',
         'test/test-tcp-open.c',
-        'test/test-tcp-squelch-connreset.c',
         'test/test-tcp-write-to-half-open-connection.c',
         'test/test-tcp-write-after-connect.c',
         'test/test-tcp-writealot.c',