diff mbox

[01/18] slirp: goto bad in udp_input if sosendto fails

Message ID 1449792930-27293-1-git-send-email-samuel.thibault@ens-lyon.org
State New
Headers show

Commit Message

Samuel Thibault Dec. 11, 2015, 12:15 a.m. UTC
From: Guillaume Subiron <maethor@subiron.org>

Before this patch, if sosendto fails, udp_input is executed as if the
packet was sent, recording the packet for icmp errors, which does not
makes sense since the packet was not actually sent, errors would be
related to a previous packet.

This patch adds a goto bad to cut the execution of this function.

Signed-off-by: Guillaume Subiron <maethor@subiron.org>
Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
---
 slirp/debug.h | 2 +-
 slirp/udp.c   | 1 +
 2 files changed, 2 insertions(+), 1 deletion(-)

Comments

Thomas Huth Dec. 11, 2015, 11:54 a.m. UTC | #1
On 11/12/15 01:15, Samuel Thibault wrote:
> From: Guillaume Subiron <maethor@subiron.org>
> 
> Before this patch, if sosendto fails, udp_input is executed as if the
> packet was sent, recording the packet for icmp errors, which does not
> makes sense since the packet was not actually sent, errors would be
> related to a previous packet.
> 
> This patch adds a goto bad to cut the execution of this function.
> 
> Signed-off-by: Guillaume Subiron <maethor@subiron.org>
> Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
> ---
>  slirp/debug.h | 2 +-
>  slirp/udp.c   | 1 +
>  2 files changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/slirp/debug.h b/slirp/debug.h
> index 6cfa61e..c60f967 100644
> --- a/slirp/debug.h
> +++ b/slirp/debug.h
> @@ -5,7 +5,7 @@
>   * terms and conditions of the copyright.
>   */
>  
> -//#define DEBUG 1
> +#define DEBUG 1

Please don't enable the debug code by default.

> diff --git a/slirp/udp.c b/slirp/udp.c
> index fee13b4..ce63414 100644
> --- a/slirp/udp.c
> +++ b/slirp/udp.c
> @@ -218,6 +218,7 @@ udp_input(register struct mbuf *m, int iphlen)
>  	  *ip=save_ip;
>  	  DEBUG_MISC((dfd,"udp tx errno = %d-%s\n",errno,strerror(errno)));
>  	  icmp_error(m, ICMP_UNREACH,ICMP_UNREACH_NET, 0,strerror(errno));
> +	  goto bad;
>  	}
>  
>  	m_free(so->so_m);   /* used for ICMP if error on sorecvfrom */

That change looks sane to me.

 Thomas
Samuel Thibault Dec. 11, 2015, 12:05 p.m. UTC | #2
Thomas Huth, on Fri 11 Dec 2015 12:54:14 +0100, wrote:
> > @@ -5,7 +5,7 @@
> >   * terms and conditions of the copyright.
> >   */
> >  
> > -//#define DEBUG 1
> > +#define DEBUG 1
> 
> Please don't enable the debug code by default.

Oops, sorry, that wasn't meant to be included in the patch series.

Samuel
diff mbox

Patch

diff --git a/slirp/debug.h b/slirp/debug.h
index 6cfa61e..c60f967 100644
--- a/slirp/debug.h
+++ b/slirp/debug.h
@@ -5,7 +5,7 @@ 
  * terms and conditions of the copyright.
  */
 
-//#define DEBUG 1
+#define DEBUG 1
 
 #ifdef DEBUG
 
diff --git a/slirp/udp.c b/slirp/udp.c
index fee13b4..ce63414 100644
--- a/slirp/udp.c
+++ b/slirp/udp.c
@@ -218,6 +218,7 @@  udp_input(register struct mbuf *m, int iphlen)
 	  *ip=save_ip;
 	  DEBUG_MISC((dfd,"udp tx errno = %d-%s\n",errno,strerror(errno)));
 	  icmp_error(m, ICMP_UNREACH,ICMP_UNREACH_NET, 0,strerror(errno));
+	  goto bad;
 	}
 
 	m_free(so->so_m);   /* used for ICMP if error on sorecvfrom */