ip6_sysctl_soiikey: use IP6_SOIIKEY_LEN instead of hardcoded value

[Sebastien Marie]

Hi,

I think it is preferable to not hardcode IP6_SOIIKEY_LEN in
ip6_sysctl_soiikey().

No changes expected, as IP6_SOIIKEY_LEN is 16.

netinet6/ip6_var.h
   295  #define IP6_SOIIKEY_LEN 16
   296  extern uint8_t  ip6_soiikey[IP6_SOIIKEY_LEN];

Thanks.
-- 
Sebastien Marie


Index: netinet6/ip6_input.c
===================================================================
RCS file: /cvs/src/sys/netinet6/ip6_input.c,v
retrieving revision 1.212
diff -u -p -U10 -r1.212 ip6_input.c
--- netinet6/ip6_input.c        10 Feb 2018 05:52:08 -0000      1.212
+++ netinet6/ip6_input.c        12 Feb 2018 09:07:05 -0000
@@ -1367,21 +1367,21 @@ ip6_sysctl_ip6stat(void *oldp, size_t *o
            ip6stat, sizeof(*ip6stat));
        free(ip6stat, M_TEMP, sizeof(*ip6stat));
 
        return (ret);
 }
 
 int
 ip6_sysctl_soiikey(void *oldp, size_t *oldlenp, void *newp, size_t newlen)
 {
        struct ifnet *ifp;
-       uint8_t oldkey[16];
+       uint8_t oldkey[IP6_SOIIKEY_LEN];
        int error;
 
        error = suser(curproc, 0);
        if (error != 0)
                return (error);
 
        memcpy(oldkey, ip6_soiikey, sizeof(oldkey));
 
        error = sysctl_struct(oldp, oldlenp, newp, newlen, ip6_soiikey,
            sizeof(ip6_soiikey));