diff --git a/ffserver.c b/ffserver.c
index 7bda96889a..abc7cd9f96 100644
--- a/ffserver.c
+++ b/ffserver.c
@@ -692,8 +692,8 @@ static int http_server(void)
            second to handle timeouts */
         do {
             ret = poll(poll_table, poll_entry - poll_table, delay);
-            if (ret < 0 && ff_neterrno() != FF_NETERROR(EAGAIN) &&
-                ff_neterrno() != FF_NETERROR(EINTR))
+            if (ret < 0 && ff_neterrno() != AVERROR(EAGAIN) &&
+                ff_neterrno() != AVERROR(EINTR))
                 return -1;
         } while (ret < 0);
 
@@ -916,8 +916,8 @@ static int handle_connection(HTTPContext *c)
     read_loop:
         len = recv(c->fd, c->buffer_ptr, 1, 0);
         if (len < 0) {
-            if (ff_neterrno() != FF_NETERROR(EAGAIN) &&
-                ff_neterrno() != FF_NETERROR(EINTR))
+            if (ff_neterrno() != AVERROR(EAGAIN) &&
+                ff_neterrno() != AVERROR(EINTR))
                 return -1;
         } else if (len == 0) {
             return -1;
@@ -952,8 +952,8 @@ static int handle_connection(HTTPContext *c)
             return 0;
         len = send(c->fd, c->buffer_ptr, c->buffer_end - c->buffer_ptr, 0);
         if (len < 0) {
-            if (ff_neterrno() != FF_NETERROR(EAGAIN) &&
-                ff_neterrno() != FF_NETERROR(EINTR)) {
+            if (ff_neterrno() != AVERROR(EAGAIN) &&
+                ff_neterrno() != AVERROR(EINTR)) {
                 /* error : close connection */
                 av_freep(&c->pb_buffer);
                 return -1;
@@ -1022,8 +1022,8 @@ static int handle_connection(HTTPContext *c)
             return 0;
         len = send(c->fd, c->buffer_ptr, c->buffer_end - c->buffer_ptr, 0);
         if (len < 0) {
-            if (ff_neterrno() != FF_NETERROR(EAGAIN) &&
-                ff_neterrno() != FF_NETERROR(EINTR)) {
+            if (ff_neterrno() != AVERROR(EAGAIN) &&
+                ff_neterrno() != AVERROR(EINTR)) {
                 /* error : close connection */
                 av_freep(&c->pb_buffer);
                 return -1;
@@ -1049,8 +1049,8 @@ static int handle_connection(HTTPContext *c)
         len = send(c->fd, c->packet_buffer_ptr,
                     c->packet_buffer_end - c->packet_buffer_ptr, 0);
         if (len < 0) {
-            if (ff_neterrno() != FF_NETERROR(EAGAIN) &&
-                ff_neterrno() != FF_NETERROR(EINTR)) {
+            if (ff_neterrno() != AVERROR(EAGAIN) &&
+                ff_neterrno() != AVERROR(EINTR)) {
                 /* error : close connection */
                 av_freep(&c->packet_buffer);
                 return -1;
@@ -2550,8 +2550,8 @@ static int http_send_data(HTTPContext *c)
                 /* TCP data output */
                 len = send(c->fd, c->buffer_ptr, c->buffer_end - c->buffer_ptr, 0);
                 if (len < 0) {
-                    if (ff_neterrno() != FF_NETERROR(EAGAIN) &&
-                        ff_neterrno() != FF_NETERROR(EINTR))
+                    if (ff_neterrno() != AVERROR(EAGAIN) &&
+                        ff_neterrno() != AVERROR(EINTR))
                         /* error : close connection */
                         return -1;
                     else
@@ -2624,8 +2624,8 @@ static int http_receive_data(HTTPContext *c)
         len = recv(c->fd, c->buffer_ptr, 1, 0);
 
         if (len < 0) {
-            if (ff_neterrno() != FF_NETERROR(EAGAIN) &&
-                ff_neterrno() != FF_NETERROR(EINTR))
+            if (ff_neterrno() != AVERROR(EAGAIN) &&
+                ff_neterrno() != AVERROR(EINTR))
                 /* error : close connection */
                 goto fail;
             return 0;
@@ -2651,8 +2651,8 @@ static int http_receive_data(HTTPContext *c)
         len = recv(c->fd, c->buffer_ptr,
                    FFMIN(c->chunk_size, c->buffer_end - c->buffer_ptr), 0);
         if (len < 0) {
-            if (ff_neterrno() != FF_NETERROR(EAGAIN) &&
-                ff_neterrno() != FF_NETERROR(EINTR))
+            if (ff_neterrno() != AVERROR(EAGAIN) &&
+                ff_neterrno() != AVERROR(EINTR))
                 /* error : close connection */
                 goto fail;
         } else if (len == 0)
diff --git a/libavformat/network.h b/libavformat/network.h
index d6aee93121..58a8e80e72 100644
--- a/libavformat/network.h
+++ b/libavformat/network.h
@@ -27,9 +27,21 @@
 #include <winsock2.h>
 #include <ws2tcpip.h>
 
-#define ff_neterrno() (-WSAGetLastError())
-#define FF_NETERROR(err) (-WSA##err)
-#define WSAEAGAIN WSAEWOULDBLOCK
+#define EPROTONOSUPPORT WSAEPROTONOSUPPORT
+#define ETIMEDOUT       WSAETIMEDOUT
+#define ECONNREFUSED    WSAECONNREFUSED
+#define EINPROGRESS     WSAEINPROGRESS
+
+static inline int ff_neterrno() {
+    int err = WSAGetLastError();
+    switch (err) {
+    case WSAEWOULDBLOCK:
+        return AVERROR(EAGAIN);
+    case WSAEINTR:
+        return AVERROR(EINTR);
+    }
+    return -err;
+}
 #else
 #include <sys/types.h>
 #include <sys/socket.h>
@@ -37,7 +49,6 @@
 #include <netdb.h>
 
 #define ff_neterrno() AVERROR(errno)
-#define FF_NETERROR(err) AVERROR(err)
 #endif
 
 #if HAVE_ARPA_INET_H
diff --git a/libavformat/rtpproto.c b/libavformat/rtpproto.c
index dd5bc71c0e..269b1b2726 100644
--- a/libavformat/rtpproto.c
+++ b/libavformat/rtpproto.c
@@ -231,8 +231,8 @@ static int rtp_read(URLContext *h, uint8_t *buf, int size)
         len = recvfrom (s->rtp_fd, buf, size, 0,
                         (struct sockaddr *)&from, &from_len);
         if (len < 0) {
-            if (ff_neterrno() == FF_NETERROR(EAGAIN) ||
-                ff_neterrno() == FF_NETERROR(EINTR))
+            if (ff_neterrno() == AVERROR(EAGAIN) ||
+                ff_neterrno() == AVERROR(EINTR))
                 continue;
             return AVERROR(EIO);
         }
@@ -251,8 +251,8 @@ static int rtp_read(URLContext *h, uint8_t *buf, int size)
                 len = recvfrom (s->rtcp_fd, buf, size, 0,
                                 (struct sockaddr *)&from, &from_len);
                 if (len < 0) {
-                    if (ff_neterrno() == FF_NETERROR(EAGAIN) ||
-                        ff_neterrno() == FF_NETERROR(EINTR))
+                    if (ff_neterrno() == AVERROR(EAGAIN) ||
+                        ff_neterrno() == AVERROR(EINTR))
                         continue;
                     return AVERROR(EIO);
                 }
@@ -264,15 +264,15 @@ static int rtp_read(URLContext *h, uint8_t *buf, int size)
                 len = recvfrom (s->rtp_fd, buf, size, 0,
                                 (struct sockaddr *)&from, &from_len);
                 if (len < 0) {
-                    if (ff_neterrno() == FF_NETERROR(EAGAIN) ||
-                        ff_neterrno() == FF_NETERROR(EINTR))
+                    if (ff_neterrno() == AVERROR(EAGAIN) ||
+                        ff_neterrno() == AVERROR(EINTR))
                         continue;
                     return AVERROR(EIO);
                 }
                 break;
             }
         } else if (n < 0) {
-            if (ff_neterrno() == FF_NETERROR(EINTR))
+            if (ff_neterrno() == AVERROR(EINTR))
                 continue;
             return AVERROR(EIO);
         }
diff --git a/libavformat/rtsp.c b/libavformat/rtsp.c
index bc8cd67c81..62311cbb23 100644
--- a/libavformat/rtsp.c
+++ b/libavformat/rtsp.c
@@ -1528,7 +1528,7 @@ redirect:
             goto fail;
         lower_transport_mask &= ~(1 << lower_transport);
         if (lower_transport_mask == 0 && err == 1) {
-            err = FF_NETERROR(EPROTONOSUPPORT);
+            err = AVERROR(EPROTONOSUPPORT);
             goto fail;
         }
     } while (err);
@@ -1615,7 +1615,7 @@ static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
             }
 #endif
         } else if (n == 0 && ++timeout_cnt >= MAX_TIMEOUTS) {
-            return FF_NETERROR(ETIMEDOUT);
+            return AVERROR(ETIMEDOUT);
         } else if (n < 0 && errno != EINTR)
             return AVERROR(errno);
     }
diff --git a/libavformat/rtspdec.c b/libavformat/rtspdec.c
index e484347896..e79f873e1b 100644
--- a/libavformat/rtspdec.c
+++ b/libavformat/rtspdec.c
@@ -311,7 +311,7 @@ retry:
 
     ret = ff_rtsp_fetch_packet(s, pkt);
     if (ret < 0) {
-        if (ret == FF_NETERROR(ETIMEDOUT) && !rt->packets) {
+        if (ret == AVERROR(ETIMEDOUT) && !rt->packets) {
             if (rt->lower_transport == RTSP_LOWER_TRANSPORT_UDP &&
                 rt->lower_transport_mask & (1 << RTSP_LOWER_TRANSPORT_TCP)) {
                 RTSPMessageHeader reply1, *reply = &reply1;
diff --git a/libavformat/sapenc.c b/libavformat/sapenc.c
index 91c1f628c7..bd3483e296 100644
--- a/libavformat/sapenc.c
+++ b/libavformat/sapenc.c
@@ -240,7 +240,7 @@ static int sap_write_packet(AVFormatContext *s, AVPacket *pkt)
     if (!sap->last_time || now - sap->last_time > 5000000) {
         int ret = url_write(sap->ann_fd, sap->ann, sap->ann_size);
         /* Don't abort even if we get "Destination unreachable" */
-        if (ret < 0 && ret != FF_NETERROR(ECONNREFUSED))
+        if (ret < 0 && ret != AVERROR(ECONNREFUSED))
             return ret;
         sap->last_time = now;
     }
diff --git a/libavformat/tcp.c b/libavformat/tcp.c
index 29eb60abe9..b01f0b85bf 100644
--- a/libavformat/tcp.c
+++ b/libavformat/tcp.c
@@ -72,13 +72,13 @@ static int tcp_open(URLContext *h, const char *uri, int flags)
     ret = connect(fd, cur_ai->ai_addr, cur_ai->ai_addrlen);
     if (ret < 0) {
         struct pollfd p = {fd, POLLOUT, 0};
-        if (ff_neterrno() == FF_NETERROR(EINTR)) {
+        if (ff_neterrno() == AVERROR(EINTR)) {
             if (url_interrupt_cb())
                 goto fail1;
             goto redo;
         }
-        if (ff_neterrno() != FF_NETERROR(EINPROGRESS) &&
-            ff_neterrno() != FF_NETERROR(EAGAIN))
+        if (ff_neterrno() != AVERROR(EINPROGRESS) &&
+            ff_neterrno() != AVERROR(EAGAIN))
             goto fail;
 
         /* wait until we are connected or until abort */
@@ -136,7 +136,7 @@ static int tcp_wait_fd(int fd, int write)
     int ret;
 
     ret = poll(&p, 1, 100);
-    return ret < 0 ? ff_neterrno() : p.revents & ev ? 0 : FF_NETERROR(EAGAIN);
+    return ret < 0 ? ff_neterrno() : p.revents & ev ? 0 : AVERROR(EAGAIN);
 }
 
 static int tcp_read(URLContext *h, uint8_t *buf, int size)
diff --git a/libavformat/udp.c b/libavformat/udp.c
index 6c1b37b59d..0196573209 100644
--- a/libavformat/udp.c
+++ b/libavformat/udp.c
@@ -455,7 +455,7 @@ static int udp_read(URLContext *h, uint8_t *buf, int size)
             return AVERROR(EINTR);
         ret = poll(&p, 1, 100);
         if (ret < 0) {
-            if (ff_neterrno() == FF_NETERROR(EINTR))
+            if (ff_neterrno() == AVERROR(EINTR))
                 continue;
             return AVERROR(EIO);
         }
@@ -463,8 +463,8 @@ static int udp_read(URLContext *h, uint8_t *buf, int size)
             continue;
         len = recv(s->udp_fd, buf, size, 0);
         if (len < 0) {
-            if (ff_neterrno() != FF_NETERROR(EAGAIN) &&
-                ff_neterrno() != FF_NETERROR(EINTR))
+            if (ff_neterrno() != AVERROR(EAGAIN) &&
+                ff_neterrno() != AVERROR(EINTR))
                 return AVERROR(EIO);
         } else {
             break;
@@ -486,8 +486,8 @@ static int udp_write(URLContext *h, const uint8_t *buf, int size)
         } else
             ret = send(s->udp_fd, buf, size, 0);
         if (ret < 0) {
-            if (ff_neterrno() != FF_NETERROR(EINTR) &&
-                ff_neterrno() != FF_NETERROR(EAGAIN))
+            if (ff_neterrno() != AVERROR(EINTR) &&
+                ff_neterrno() != AVERROR(EAGAIN))
                 return ff_neterrno();
         } else {
             break;