On Mon, 30 Jan 2012 03:02:35 +0100 (CET) Jan Engelhardt <jengelh@xxxxxxxxxx> wrote: > On Monday 2012-01-30 01:31, Stephen Hemminger wrote: > > >On Sun, 29 Jan 2012 23:24:27 +0000 > >Ed W <lists@xxxxxxxxxxxxxx> wrote: > > > >> On 29/01/2012 11:50, Jan Engelhardt wrote: > >> > On Sunday 2012-01-29 03:23, Simon Chen wrote: > >> > > >> >> Hey folks, > >> >> > >> >> To my limited knowledge, Linux currently supports 256 (255?) routing > >> >> tables defined in /etc/iproute2/rt_tables. > >> > There are 2147483647. > >> > > >> > >> Any reason why it's not an unsigned 32bit int? (surely there is a corner > >> case where this is useful...) > >> > >> Ed W > > > >The 8 bit value is enshrined in the API for 'struct rtmsg' and therefore > >increasing it would break existing applications. > > Actually, what Ed (and me too) was wondering about was: > > why does `ip route show table $[0x80000000]` not print an empty table, > i.e. where is it that some code uses int/s32 during parsing of > the argument and/or the RTA_TABLE attribute? There are lots of places internally in ip utilities that use u32 for route table. But the route input/output message format is still limited to 8 bits. -- To unsubscribe from this list: send the line "unsubscribe netfilter" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
