* Add INADDR_DUMMY from Linux 5.13 to netinet/in.h
@ 2021-08-05 20:05 Joseph Myers
2021-08-05 20:12 ` Florian Weimer
0 siblings, 1 reply; 2+ messages in thread
From: Joseph Myers @ 2021-08-05 20:05 UTC (permalink / raw)
To: libc-alpha
Linux 5.13 adds an INADDR_DUMMY definition; add a corresponding
definition to glibc's netinet/in.h. (This isn't strictly a new kernel
interface, rather a value defined in RFC 7600.)
Tested for x86_64.
diff --git a/inet/netinet/in.h b/inet/netinet/in.h
index ed21690afb..cee35efec9 100644
--- a/inet/netinet/in.h
+++ b/inet/netinet/in.h
@@ -196,6 +196,9 @@ enum
#define INADDR_BROADCAST ((in_addr_t) 0xffffffff)
/* Address indicating an error return. */
#define INADDR_NONE ((in_addr_t) 0xffffffff)
+/* Dummy address for source of ICMPv6 errors converted to IPv4 (RFC
+ 7600). */
+#define INADDR_DUMMY ((in_addr_t) 0xc0000008)
/* Network number for local host loopback. */
#define IN_LOOPBACKNET 127
--
Joseph S. Myers
joseph@codesourcery.com
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: Add INADDR_DUMMY from Linux 5.13 to netinet/in.h
2021-08-05 20:05 Add INADDR_DUMMY from Linux 5.13 to netinet/in.h Joseph Myers
@ 2021-08-05 20:12 ` Florian Weimer
0 siblings, 0 replies; 2+ messages in thread
From: Florian Weimer @ 2021-08-05 20:12 UTC (permalink / raw)
To: Joseph Myers; +Cc: libc-alpha
* Joseph Myers:
> Linux 5.13 adds an INADDR_DUMMY definition; add a corresponding
> definition to glibc's netinet/in.h. (This isn't strictly a new kernel
> interface, rather a value defined in RFC 7600.)
>
> Tested for x86_64.
>
> diff --git a/inet/netinet/in.h b/inet/netinet/in.h
> index ed21690afb..cee35efec9 100644
> --- a/inet/netinet/in.h
> +++ b/inet/netinet/in.h
> @@ -196,6 +196,9 @@ enum
> #define INADDR_BROADCAST ((in_addr_t) 0xffffffff)
> /* Address indicating an error return. */
> #define INADDR_NONE ((in_addr_t) 0xffffffff)
> +/* Dummy address for source of ICMPv6 errors converted to IPv4 (RFC
> + 7600). */
> +#define INADDR_DUMMY ((in_addr_t) 0xc0000008)
>
> /* Network number for local host loopback. */
> #define IN_LOOPBACKNET 127
I checked that the value matches RFC 7600 (192.0.0.8). Looks good.
Thanks,
Florian
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