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devip: make sure ifc is bound in add6 ctl command

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This commit is contained in:
cinap_lenrek 2019-05-11 14:54:10 +02:00
parent 3a0d5f41a8
commit 7186be0424
1 changed files with 5 additions and 3 deletions
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8
sys/src/9/ip/ipifc.c
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@ -1576,13 +1576,14 @@ ipifcregisterproxy(Fs *f, Ipifc *ifc, uchar *ip, int add)
}
char*
ipifcadd6(Ipifc *ifc, char**argv, int argc)
ipifcadd6(Ipifc *ifc, char **argv, int argc)
{
int plen = 64;
char addr[40], preflen[6];
char *params[3];
uchar prefix[IPaddrlen];
Iplifc lifc;
Medium *m;
lifc.onlink = 1;
lifc.autoflag = 1;
@ -1616,9 +1617,10 @@ ipifcadd6(Ipifc *ifc, char**argv, int argc)
return Ebadarg;
/* issue "add" ctl msg for v6 link-local addr and prefix len */
if(ifc->m->pref2addr == nil)
m = ifc->m;
if(m == nil || m->pref2addr == nil)
return Ebadarg;
(*ifc->m->pref2addr)(prefix, ifc->mac); /* mac → v6 link-local addr */
(*m->pref2addr)(prefix, ifc->mac); /* mac → v6 link-local addr */
sprint(addr, "%I", prefix);
sprint(preflen, "/%d", plen);