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[FFmpeg-devel,v3,1/3] avformat/udp: return the error code instead of generic EIO

Message ID 1610087542-12587-1-git-send-email-lance.lmwang@gmail.com
State Superseded
Headers show
Series [FFmpeg-devel,v3,1/3] avformat/udp: return the error code instead of generic EIO
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Commit Message

Limin Wang Jan. 8, 2021, 6:32 a.m. UTC
From: Limin Wang <lance.lmwang@gmail.com>

Signed-off-by: Limin Wang <lance.lmwang@gmail.com>
---
 libavformat/udp.c | 42 ++++++++++++++++++++++--------------------
 1 file changed, 22 insertions(+), 20 deletions(-)

Comments

Marton Balint Jan. 8, 2021, 11:23 p.m. UTC | #1
On Fri, 8 Jan 2021, lance.lmwang@gmail.com wrote:

> From: Limin Wang <lance.lmwang@gmail.com>
>
> Signed-off-by: Limin Wang <lance.lmwang@gmail.com>
> ---
> libavformat/udp.c | 42 ++++++++++++++++++++++--------------------
> 1 file changed, 22 insertions(+), 20 deletions(-)
>
> diff --git a/libavformat/udp.c b/libavformat/udp.c
> index 13c346a..28987e0 100644
> --- a/libavformat/udp.c
> +++ b/libavformat/udp.c
> @@ -633,6 +633,8 @@ static int udp_open(URLContext *h, const char *uri, int flags)
>     char buf[256];
>     struct sockaddr_storage my_addr;
>     socklen_t len;
> +    int ret = AVERROR(EIO);
> +    int net_ret = 0;
>
>     h->is_streamed = 1;
> 
> @@ -641,12 +643,12 @@ static int udp_open(URLContext *h, const char *uri, int flags)
>         s->buffer_size = is_output ? UDP_TX_BUF_SIZE : UDP_RX_BUF_SIZE;
>
>     if (s->sources) {
> -        if (ff_ip_parse_sources(h, s->sources, &s->filters) < 0)
> +        if ((ret = ff_ip_parse_sources(h, s->sources, &s->filters)) < 0)
>             goto fail;
>     }
>
>     if (s->block) {
> -        if (ff_ip_parse_blocks(h, s->block, &s->filters) < 0)
> +        if ((ret = ff_ip_parse_blocks(h, s->block, &s->filters)) < 0)
>             goto fail;
>     }
> 
> @@ -712,11 +714,11 @@ static int udp_open(URLContext *h, const char *uri, int flags)
>             av_strlcpy(localaddr, buf, sizeof(localaddr));
>         }
>         if (av_find_info_tag(buf, sizeof(buf), "sources", p)) {
> -            if (ff_ip_parse_sources(h, buf, &s->filters) < 0)
> +            if ((ret = ff_ip_parse_sources(h, buf, &s->filters)) < 0)
>                 goto fail;
>         }
>         if (av_find_info_tag(buf, sizeof(buf), "block", p)) {
> -            if (ff_ip_parse_blocks(h, buf, &s->filters) < 0)
> +            if ((ret = ff_ip_parse_blocks(h, buf, &s->filters)) < 0)
>                 goto fail;
>         }
>         if (!is_output && av_find_info_tag(buf, sizeof(buf), "timeout", p))
> @@ -742,7 +744,7 @@ static int udp_open(URLContext *h, const char *uri, int flags)
>         if (!(flags & AVIO_FLAG_READ))
>             goto fail;
>     } else {
> -        if (ff_udp_set_remote_url(h, uri) < 0)
> +        if ((ret = ff_udp_set_remote_url(h, uri)) < 0)
>             goto fail;
>     }
> 
> @@ -763,13 +765,13 @@ static int udp_open(URLContext *h, const char *uri, int flags)
>      */
>     if (s->reuse_socket > 0 || (s->is_multicast && s->reuse_socket < 0)) {
>         s->reuse_socket = 1;
> -        if (setsockopt (udp_fd, SOL_SOCKET, SO_REUSEADDR, &(s->reuse_socket), sizeof(s->reuse_socket)) != 0)
> +        if ((net_ret = setsockopt (udp_fd, SOL_SOCKET, SO_REUSEADDR, &(s->reuse_socket), sizeof(s->reuse_socket))) != 0)
>             goto fail;
>     }
>
>     if (s->is_broadcast) {
> #ifdef SO_BROADCAST
> -        if (setsockopt (udp_fd, SOL_SOCKET, SO_BROADCAST, &(s->is_broadcast), sizeof(s->is_broadcast)) != 0)
> +        if ((net_ret = setsockopt (udp_fd, SOL_SOCKET, SO_BROADCAST, &(s->is_broadcast), sizeof(s->is_broadcast))) != 0)
> #endif
>            goto fail;
>     }
> @@ -788,7 +790,7 @@ static int udp_open(URLContext *h, const char *uri, int flags)
>
>     if (dscp >= 0) {
>         dscp <<= 2;
> -        if (setsockopt (udp_fd, IPPROTO_IP, IP_TOS, &dscp, sizeof(dscp)) != 0)
> +        if ((net_ret = setsockopt (udp_fd, IPPROTO_IP, IP_TOS, &dscp, sizeof(dscp))) != 0)
>             goto fail;
>     }
> 
> @@ -802,7 +804,7 @@ static int udp_open(URLContext *h, const char *uri, int flags)
>     /* bind to the local address if not multicast or if the multicast
>      * bind failed */
>     /* the bind is needed to give a port to the socket now */
> -    if (bind_ret < 0 && bind(udp_fd,(struct sockaddr *)&my_addr, len) < 0) {
> +    if (bind_ret < 0 && (net_ret = bind(udp_fd,(struct sockaddr *)&my_addr, len)) < 0) {
>         ff_log_net_error(h, AV_LOG_ERROR, "bind failed");
>         goto fail;
>     }
> @@ -814,28 +816,28 @@ static int udp_open(URLContext *h, const char *uri, int flags)
>     if (s->is_multicast) {
>         if (h->flags & AVIO_FLAG_WRITE) {
>             /* output */
> -            if (udp_set_multicast_ttl(udp_fd, s->ttl, (struct sockaddr *)&s->dest_addr) < 0)
> +            if ((net_ret = udp_set_multicast_ttl(udp_fd, s->ttl, (struct sockaddr *)&s->dest_addr)) < 0)

I suggest you make this ret as well and change udp_set_multicast_ttl to 
return ff_neterrno() instead of -1 on error.

>                 goto fail;
>         }
>         if (h->flags & AVIO_FLAG_READ) {
>             /* input */
>             if (s->filters.nb_include_addrs) {
> -                if (udp_set_multicast_sources(h, udp_fd,
> +                if ((net_ret = udp_set_multicast_sources(h, udp_fd,

This is ret as far as I see.

>                                               (struct sockaddr *)&s->dest_addr,
>                                               s->dest_addr_len, &s->local_addr_storage,
>                                               s->filters.include_addrs,
> -                                              s->filters.nb_include_addrs, 1) < 0)
> +                                              s->filters.nb_include_addrs, 1)) < 0)
>                     goto fail;
>             } else {
> -                if (udp_join_multicast_group(udp_fd, (struct sockaddr *)&s->dest_addr,(struct sockaddr *)&s->local_addr_storage) < 0)
> +                if ((net_ret = udp_join_multicast_group(udp_fd, (struct sockaddr *)&s->dest_addr,(struct sockaddr *)&s->local_addr_storage)) < 0)

Same comment as for udp_set_multicast_ttl.

>                     goto fail;
>             }
>             if (s->filters.nb_exclude_addrs) {
> -                if (udp_set_multicast_sources(h, udp_fd,
> +                if ((net_ret = udp_set_multicast_sources(h, udp_fd,

This is also ret.

>                                               (struct sockaddr *)&s->dest_addr,
>                                               s->dest_addr_len, &s->local_addr_storage,
>                                               s->filters.exclude_addrs,
> -                                              s->filters.nb_exclude_addrs, 0) < 0)
> +                                              s->filters.nb_exclude_addrs, 0)) < 0)
>                     goto fail;
>             }
>         }
> @@ -844,7 +846,7 @@ static int udp_open(URLContext *h, const char *uri, int flags)
>     if (is_output) {
>         /* limit the tx buf size to limit latency */
>         tmp = s->buffer_size;
> -        if (setsockopt(udp_fd, SOL_SOCKET, SO_SNDBUF, &tmp, sizeof(tmp)) < 0) {
> +        if ((net_ret = setsockopt(udp_fd, SOL_SOCKET, SO_SNDBUF, &tmp, sizeof(tmp))) < 0) {
>             ff_log_net_error(h, AV_LOG_ERROR, "setsockopt(SO_SNDBUF)");
>             goto fail;
>         }
> @@ -867,7 +869,7 @@ static int udp_open(URLContext *h, const char *uri, int flags)
>         ff_socket_nonblock(udp_fd, 1);
>     }
>     if (s->is_connected) {
> -        if (connect(udp_fd, (struct sockaddr *) &s->dest_addr, s->dest_addr_len)) {
> +        if (net_ret = connect(udp_fd, (struct sockaddr *) &s->dest_addr, s->dest_addr_len)) {
>             ff_log_net_error(h, AV_LOG_ERROR, "connect");
>             goto fail;
>         }
> @@ -888,8 +890,6 @@ static int udp_open(URLContext *h, const char *uri, int flags)
>     }
>
>     if ((!is_output && s->circular_buffer_size) || (is_output && s->bitrate && s->circular_buffer_size)) {
> -        int ret;
> -
>         /* start the task going */
>         s->fifo = av_fifo_alloc(s->circular_buffer_size);
>         ret = pthread_mutex_init(&s->mutex, NULL);
> @@ -919,11 +919,13 @@ static int udp_open(URLContext *h, const char *uri, int flags)
>     pthread_mutex_destroy(&s->mutex);
> #endif
>  fail:
> +    if (net_ret < 0)

Strictly speaking this is not the same, because in some cases the code 
checks for non-zeroness for success of network functions, and not 
less-than-zero. I don't know if it makes a difference in practice for 
some exotic architectures, yes the current code is not conistent about 
it.

Regards,
Marton


> +        ret = ff_neterrno();
>     if (udp_fd >= 0)
>         closesocket(udp_fd);
>     av_fifo_freep(&s->fifo);
>     ff_ip_reset_filters(&s->filters);
> -    return AVERROR(EIO);
> +    return ret;
> }
> 
> static int udplite_open(URLContext *h, const char *uri, int flags)
> -- 
> 1.8.3.1
>
> _______________________________________________
> ffmpeg-devel mailing list
> ffmpeg-devel@ffmpeg.org
> https://ffmpeg.org/mailman/listinfo/ffmpeg-devel
>
> To unsubscribe, visit link above, or email
> ffmpeg-devel-request@ffmpeg.org with subject "unsubscribe".
Limin Wang Jan. 9, 2021, 3:11 a.m. UTC | #2
On Sat, Jan 09, 2021 at 12:23:42AM +0100, Marton Balint wrote:
> 
> 
> On Fri, 8 Jan 2021, lance.lmwang@gmail.com wrote:
> 
> > From: Limin Wang <lance.lmwang@gmail.com>
> > 
> > Signed-off-by: Limin Wang <lance.lmwang@gmail.com>
> > ---
> > libavformat/udp.c | 42 ++++++++++++++++++++++--------------------
> > 1 file changed, 22 insertions(+), 20 deletions(-)
> > 
> > diff --git a/libavformat/udp.c b/libavformat/udp.c
> > index 13c346a..28987e0 100644
> > --- a/libavformat/udp.c
> > +++ b/libavformat/udp.c
> > @@ -633,6 +633,8 @@ static int udp_open(URLContext *h, const char *uri, int flags)
> >     char buf[256];
> >     struct sockaddr_storage my_addr;
> >     socklen_t len;
> > +    int ret = AVERROR(EIO);
> > +    int net_ret = 0;
> > 
> >     h->is_streamed = 1;
> > 
> > @@ -641,12 +643,12 @@ static int udp_open(URLContext *h, const char *uri, int flags)
> >         s->buffer_size = is_output ? UDP_TX_BUF_SIZE : UDP_RX_BUF_SIZE;
> > 
> >     if (s->sources) {
> > -        if (ff_ip_parse_sources(h, s->sources, &s->filters) < 0)
> > +        if ((ret = ff_ip_parse_sources(h, s->sources, &s->filters)) < 0)
> >             goto fail;
> >     }
> > 
> >     if (s->block) {
> > -        if (ff_ip_parse_blocks(h, s->block, &s->filters) < 0)
> > +        if ((ret = ff_ip_parse_blocks(h, s->block, &s->filters)) < 0)
> >             goto fail;
> >     }
> > 
> > @@ -712,11 +714,11 @@ static int udp_open(URLContext *h, const char *uri, int flags)
> >             av_strlcpy(localaddr, buf, sizeof(localaddr));
> >         }
> >         if (av_find_info_tag(buf, sizeof(buf), "sources", p)) {
> > -            if (ff_ip_parse_sources(h, buf, &s->filters) < 0)
> > +            if ((ret = ff_ip_parse_sources(h, buf, &s->filters)) < 0)
> >                 goto fail;
> >         }
> >         if (av_find_info_tag(buf, sizeof(buf), "block", p)) {
> > -            if (ff_ip_parse_blocks(h, buf, &s->filters) < 0)
> > +            if ((ret = ff_ip_parse_blocks(h, buf, &s->filters)) < 0)
> >                 goto fail;
> >         }
> >         if (!is_output && av_find_info_tag(buf, sizeof(buf), "timeout", p))
> > @@ -742,7 +744,7 @@ static int udp_open(URLContext *h, const char *uri, int flags)
> >         if (!(flags & AVIO_FLAG_READ))
> >             goto fail;
> >     } else {
> > -        if (ff_udp_set_remote_url(h, uri) < 0)
> > +        if ((ret = ff_udp_set_remote_url(h, uri)) < 0)
> >             goto fail;
> >     }
> > 
> > @@ -763,13 +765,13 @@ static int udp_open(URLContext *h, const char *uri, int flags)
> >      */
> >     if (s->reuse_socket > 0 || (s->is_multicast && s->reuse_socket < 0)) {
> >         s->reuse_socket = 1;
> > -        if (setsockopt (udp_fd, SOL_SOCKET, SO_REUSEADDR, &(s->reuse_socket), sizeof(s->reuse_socket)) != 0)
> > +        if ((net_ret = setsockopt (udp_fd, SOL_SOCKET, SO_REUSEADDR, &(s->reuse_socket), sizeof(s->reuse_socket))) != 0)
> >             goto fail;
> >     }
> > 
> >     if (s->is_broadcast) {
> > #ifdef SO_BROADCAST
> > -        if (setsockopt (udp_fd, SOL_SOCKET, SO_BROADCAST, &(s->is_broadcast), sizeof(s->is_broadcast)) != 0)
> > +        if ((net_ret = setsockopt (udp_fd, SOL_SOCKET, SO_BROADCAST, &(s->is_broadcast), sizeof(s->is_broadcast))) != 0)
> > #endif
> >            goto fail;
> >     }
> > @@ -788,7 +790,7 @@ static int udp_open(URLContext *h, const char *uri, int flags)
> > 
> >     if (dscp >= 0) {
> >         dscp <<= 2;
> > -        if (setsockopt (udp_fd, IPPROTO_IP, IP_TOS, &dscp, sizeof(dscp)) != 0)
> > +        if ((net_ret = setsockopt (udp_fd, IPPROTO_IP, IP_TOS, &dscp, sizeof(dscp))) != 0)
> >             goto fail;
> >     }
> > 
> > @@ -802,7 +804,7 @@ static int udp_open(URLContext *h, const char *uri, int flags)
> >     /* bind to the local address if not multicast or if the multicast
> >      * bind failed */
> >     /* the bind is needed to give a port to the socket now */
> > -    if (bind_ret < 0 && bind(udp_fd,(struct sockaddr *)&my_addr, len) < 0) {
> > +    if (bind_ret < 0 && (net_ret = bind(udp_fd,(struct sockaddr *)&my_addr, len)) < 0) {
> >         ff_log_net_error(h, AV_LOG_ERROR, "bind failed");
> >         goto fail;
> >     }
> > @@ -814,28 +816,28 @@ static int udp_open(URLContext *h, const char *uri, int flags)
> >     if (s->is_multicast) {
> >         if (h->flags & AVIO_FLAG_WRITE) {
> >             /* output */
> > -            if (udp_set_multicast_ttl(udp_fd, s->ttl, (struct sockaddr *)&s->dest_addr) < 0)
> > +            if ((net_ret = udp_set_multicast_ttl(udp_fd, s->ttl, (struct sockaddr *)&s->dest_addr)) < 0)
> 
> I suggest you make this ret as well and change udp_set_multicast_ttl to
> return ff_neterrno() instead of -1 on error.

OK, will change by suggestion.

> 
> >                 goto fail;
> >         }
> >         if (h->flags & AVIO_FLAG_READ) {
> >             /* input */
> >             if (s->filters.nb_include_addrs) {
> > -                if (udp_set_multicast_sources(h, udp_fd,
> > +                if ((net_ret = udp_set_multicast_sources(h, udp_fd,
> 
> This is ret as far as I see.
yes, use ret is better, will fix it.
> 
> >                                               (struct sockaddr *)&s->dest_addr,
> >                                               s->dest_addr_len, &s->local_addr_storage,
> >                                               s->filters.include_addrs,
> > -                                              s->filters.nb_include_addrs, 1) < 0)
> > +                                              s->filters.nb_include_addrs, 1)) < 0)
> >                     goto fail;
> >             } else {
> > -                if (udp_join_multicast_group(udp_fd, (struct sockaddr *)&s->dest_addr,(struct sockaddr *)&s->local_addr_storage) < 0)
> > +                if ((net_ret = udp_join_multicast_group(udp_fd, (struct sockaddr *)&s->dest_addr,(struct sockaddr *)&s->local_addr_storage)) < 0)
> 
> Same comment as for udp_set_multicast_ttl.

OK

> 
> >                     goto fail;
> >             }
> >             if (s->filters.nb_exclude_addrs) {
> > -                if (udp_set_multicast_sources(h, udp_fd,
> > +                if ((net_ret = udp_set_multicast_sources(h, udp_fd,
> 
> This is also ret.

OK

> 
> >                                               (struct sockaddr *)&s->dest_addr,
> >                                               s->dest_addr_len, &s->local_addr_storage,
> >                                               s->filters.exclude_addrs,
> > -                                              s->filters.nb_exclude_addrs, 0) < 0)
> > +                                              s->filters.nb_exclude_addrs, 0)) < 0)
> >                     goto fail;
> >             }
> >         }
> > @@ -844,7 +846,7 @@ static int udp_open(URLContext *h, const char *uri, int flags)
> >     if (is_output) {
> >         /* limit the tx buf size to limit latency */
> >         tmp = s->buffer_size;
> > -        if (setsockopt(udp_fd, SOL_SOCKET, SO_SNDBUF, &tmp, sizeof(tmp)) < 0) {
> > +        if ((net_ret = setsockopt(udp_fd, SOL_SOCKET, SO_SNDBUF, &tmp, sizeof(tmp))) < 0) {
> >             ff_log_net_error(h, AV_LOG_ERROR, "setsockopt(SO_SNDBUF)");
> >             goto fail;
> >         }
> > @@ -867,7 +869,7 @@ static int udp_open(URLContext *h, const char *uri, int flags)
> >         ff_socket_nonblock(udp_fd, 1);
> >     }
> >     if (s->is_connected) {
> > -        if (connect(udp_fd, (struct sockaddr *) &s->dest_addr, s->dest_addr_len)) {
> > +        if (net_ret = connect(udp_fd, (struct sockaddr *) &s->dest_addr, s->dest_addr_len)) {
> >             ff_log_net_error(h, AV_LOG_ERROR, "connect");
> >             goto fail;
> >         }
> > @@ -888,8 +890,6 @@ static int udp_open(URLContext *h, const char *uri, int flags)
> >     }
> > 
> >     if ((!is_output && s->circular_buffer_size) || (is_output && s->bitrate && s->circular_buffer_size)) {
> > -        int ret;
> > -
> >         /* start the task going */
> >         s->fifo = av_fifo_alloc(s->circular_buffer_size);
> >         ret = pthread_mutex_init(&s->mutex, NULL);
> > @@ -919,11 +919,13 @@ static int udp_open(URLContext *h, const char *uri, int flags)
> >     pthread_mutex_destroy(&s->mutex);
> > #endif
> >  fail:
> > +    if (net_ret < 0)
> 
> Strictly speaking this is not the same, because in some cases the code
> checks for non-zeroness for success of network functions, and not
> less-than-zero. I don't know if it makes a difference in practice for some
> exotic architectures, yes the current code is not conistent about it.

yes, I'll change to assign the error code for every failure of network functions to avoid
the consistent.

> 
> Regards,
> Marton
> 
> 
> > +        ret = ff_neterrno();
> >     if (udp_fd >= 0)
> >         closesocket(udp_fd);
> >     av_fifo_freep(&s->fifo);
> >     ff_ip_reset_filters(&s->filters);
> > -    return AVERROR(EIO);
> > +    return ret;
> > }
> > 
> > static int udplite_open(URLContext *h, const char *uri, int flags)
> > -- 
> > 1.8.3.1
> > 
> > _______________________________________________
> > ffmpeg-devel mailing list
> > ffmpeg-devel@ffmpeg.org
> > https://ffmpeg.org/mailman/listinfo/ffmpeg-devel
> > 
> > To unsubscribe, visit link above, or email
> > ffmpeg-devel-request@ffmpeg.org with subject "unsubscribe".
> _______________________________________________
> ffmpeg-devel mailing list
> ffmpeg-devel@ffmpeg.org
> https://ffmpeg.org/mailman/listinfo/ffmpeg-devel
> 
> To unsubscribe, visit link above, or email
> ffmpeg-devel-request@ffmpeg.org with subject "unsubscribe".
diff mbox series

Patch

diff --git a/libavformat/udp.c b/libavformat/udp.c
index 13c346a..28987e0 100644
--- a/libavformat/udp.c
+++ b/libavformat/udp.c
@@ -633,6 +633,8 @@  static int udp_open(URLContext *h, const char *uri, int flags)
     char buf[256];
     struct sockaddr_storage my_addr;
     socklen_t len;
+    int ret = AVERROR(EIO);
+    int net_ret = 0;
 
     h->is_streamed = 1;
 
@@ -641,12 +643,12 @@  static int udp_open(URLContext *h, const char *uri, int flags)
         s->buffer_size = is_output ? UDP_TX_BUF_SIZE : UDP_RX_BUF_SIZE;
 
     if (s->sources) {
-        if (ff_ip_parse_sources(h, s->sources, &s->filters) < 0)
+        if ((ret = ff_ip_parse_sources(h, s->sources, &s->filters)) < 0)
             goto fail;
     }
 
     if (s->block) {
-        if (ff_ip_parse_blocks(h, s->block, &s->filters) < 0)
+        if ((ret = ff_ip_parse_blocks(h, s->block, &s->filters)) < 0)
             goto fail;
     }
 
@@ -712,11 +714,11 @@  static int udp_open(URLContext *h, const char *uri, int flags)
             av_strlcpy(localaddr, buf, sizeof(localaddr));
         }
         if (av_find_info_tag(buf, sizeof(buf), "sources", p)) {
-            if (ff_ip_parse_sources(h, buf, &s->filters) < 0)
+            if ((ret = ff_ip_parse_sources(h, buf, &s->filters)) < 0)
                 goto fail;
         }
         if (av_find_info_tag(buf, sizeof(buf), "block", p)) {
-            if (ff_ip_parse_blocks(h, buf, &s->filters) < 0)
+            if ((ret = ff_ip_parse_blocks(h, buf, &s->filters)) < 0)
                 goto fail;
         }
         if (!is_output && av_find_info_tag(buf, sizeof(buf), "timeout", p))
@@ -742,7 +744,7 @@  static int udp_open(URLContext *h, const char *uri, int flags)
         if (!(flags & AVIO_FLAG_READ))
             goto fail;
     } else {
-        if (ff_udp_set_remote_url(h, uri) < 0)
+        if ((ret = ff_udp_set_remote_url(h, uri)) < 0)
             goto fail;
     }
 
@@ -763,13 +765,13 @@  static int udp_open(URLContext *h, const char *uri, int flags)
      */
     if (s->reuse_socket > 0 || (s->is_multicast && s->reuse_socket < 0)) {
         s->reuse_socket = 1;
-        if (setsockopt (udp_fd, SOL_SOCKET, SO_REUSEADDR, &(s->reuse_socket), sizeof(s->reuse_socket)) != 0)
+        if ((net_ret = setsockopt (udp_fd, SOL_SOCKET, SO_REUSEADDR, &(s->reuse_socket), sizeof(s->reuse_socket))) != 0)
             goto fail;
     }
 
     if (s->is_broadcast) {
 #ifdef SO_BROADCAST
-        if (setsockopt (udp_fd, SOL_SOCKET, SO_BROADCAST, &(s->is_broadcast), sizeof(s->is_broadcast)) != 0)
+        if ((net_ret = setsockopt (udp_fd, SOL_SOCKET, SO_BROADCAST, &(s->is_broadcast), sizeof(s->is_broadcast))) != 0)
 #endif
            goto fail;
     }
@@ -788,7 +790,7 @@  static int udp_open(URLContext *h, const char *uri, int flags)
 
     if (dscp >= 0) {
         dscp <<= 2;
-        if (setsockopt (udp_fd, IPPROTO_IP, IP_TOS, &dscp, sizeof(dscp)) != 0)
+        if ((net_ret = setsockopt (udp_fd, IPPROTO_IP, IP_TOS, &dscp, sizeof(dscp))) != 0)
             goto fail;
     }
 
@@ -802,7 +804,7 @@  static int udp_open(URLContext *h, const char *uri, int flags)
     /* bind to the local address if not multicast or if the multicast
      * bind failed */
     /* the bind is needed to give a port to the socket now */
-    if (bind_ret < 0 && bind(udp_fd,(struct sockaddr *)&my_addr, len) < 0) {
+    if (bind_ret < 0 && (net_ret = bind(udp_fd,(struct sockaddr *)&my_addr, len)) < 0) {
         ff_log_net_error(h, AV_LOG_ERROR, "bind failed");
         goto fail;
     }
@@ -814,28 +816,28 @@  static int udp_open(URLContext *h, const char *uri, int flags)
     if (s->is_multicast) {
         if (h->flags & AVIO_FLAG_WRITE) {
             /* output */
-            if (udp_set_multicast_ttl(udp_fd, s->ttl, (struct sockaddr *)&s->dest_addr) < 0)
+            if ((net_ret = udp_set_multicast_ttl(udp_fd, s->ttl, (struct sockaddr *)&s->dest_addr)) < 0)
                 goto fail;
         }
         if (h->flags & AVIO_FLAG_READ) {
             /* input */
             if (s->filters.nb_include_addrs) {
-                if (udp_set_multicast_sources(h, udp_fd,
+                if ((net_ret = udp_set_multicast_sources(h, udp_fd,
                                               (struct sockaddr *)&s->dest_addr,
                                               s->dest_addr_len, &s->local_addr_storage,
                                               s->filters.include_addrs,
-                                              s->filters.nb_include_addrs, 1) < 0)
+                                              s->filters.nb_include_addrs, 1)) < 0)
                     goto fail;
             } else {
-                if (udp_join_multicast_group(udp_fd, (struct sockaddr *)&s->dest_addr,(struct sockaddr *)&s->local_addr_storage) < 0)
+                if ((net_ret = udp_join_multicast_group(udp_fd, (struct sockaddr *)&s->dest_addr,(struct sockaddr *)&s->local_addr_storage)) < 0)
                     goto fail;
             }
             if (s->filters.nb_exclude_addrs) {
-                if (udp_set_multicast_sources(h, udp_fd,
+                if ((net_ret = udp_set_multicast_sources(h, udp_fd,
                                               (struct sockaddr *)&s->dest_addr,
                                               s->dest_addr_len, &s->local_addr_storage,
                                               s->filters.exclude_addrs,
-                                              s->filters.nb_exclude_addrs, 0) < 0)
+                                              s->filters.nb_exclude_addrs, 0)) < 0)
                     goto fail;
             }
         }
@@ -844,7 +846,7 @@  static int udp_open(URLContext *h, const char *uri, int flags)
     if (is_output) {
         /* limit the tx buf size to limit latency */
         tmp = s->buffer_size;
-        if (setsockopt(udp_fd, SOL_SOCKET, SO_SNDBUF, &tmp, sizeof(tmp)) < 0) {
+        if ((net_ret = setsockopt(udp_fd, SOL_SOCKET, SO_SNDBUF, &tmp, sizeof(tmp))) < 0) {
             ff_log_net_error(h, AV_LOG_ERROR, "setsockopt(SO_SNDBUF)");
             goto fail;
         }
@@ -867,7 +869,7 @@  static int udp_open(URLContext *h, const char *uri, int flags)
         ff_socket_nonblock(udp_fd, 1);
     }
     if (s->is_connected) {
-        if (connect(udp_fd, (struct sockaddr *) &s->dest_addr, s->dest_addr_len)) {
+        if (net_ret = connect(udp_fd, (struct sockaddr *) &s->dest_addr, s->dest_addr_len)) {
             ff_log_net_error(h, AV_LOG_ERROR, "connect");
             goto fail;
         }
@@ -888,8 +890,6 @@  static int udp_open(URLContext *h, const char *uri, int flags)
     }
 
     if ((!is_output && s->circular_buffer_size) || (is_output && s->bitrate && s->circular_buffer_size)) {
-        int ret;
-
         /* start the task going */
         s->fifo = av_fifo_alloc(s->circular_buffer_size);
         ret = pthread_mutex_init(&s->mutex, NULL);
@@ -919,11 +919,13 @@  static int udp_open(URLContext *h, const char *uri, int flags)
     pthread_mutex_destroy(&s->mutex);
 #endif
  fail:
+    if (net_ret < 0)
+        ret = ff_neterrno();
     if (udp_fd >= 0)
         closesocket(udp_fd);
     av_fifo_freep(&s->fifo);
     ff_ip_reset_filters(&s->filters);
-    return AVERROR(EIO);
+    return ret;
 }
 
 static int udplite_open(URLContext *h, const char *uri, int flags)