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devip: don't set mtu of interface to zero when not specified (thanks joe9)

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change 9f74a951ae6a introduced a bug that set the mtu of a new
interface to 0 when not specified in the add ctl.
This commit is contained in:
cinap_lenrek 2018-05-14 19:18:13 +02:00
parent 19d6a98038
commit c9bb6f68eb
1 changed files with 1 additions and 1 deletions
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2
sys/src/9/ip/ipifc.c
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@ -507,7 +507,7 @@ ipifcadd(Ipifc *ifc, char **argv, int argc, int tentative, Iplifc *lifcp)
return up->errstr;
}
if(mtu >= ifc->m->mintu && mtu <= ifc->m->maxtu)
if(mtu > 0 && mtu >= ifc->m->mintu && mtu <= ifc->m->maxtu)
ifc->maxtu = mtu;
/* ignore if this is already a local address for this ifc */