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Fix "netstat -gW" behavior broken in r259638.

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netstat has two options for printing multicast tables:
sysctl (the default one for live systems) and kvm-based one (for cores).
It looks like kvm-based one hasn't been working since it's been introduced
in r190012 due to absence of mfctablesize kernel symbol.
Check for all ipv4-multicast symbols being correctly resolved was introduced
in r259638 regardless of 'live' value leading to "No IPv4 MROUTING" error
message.

Reported by:	Olivier Cochard-Labbé
MFC after:	1 week
This commit is contained in:
Alexander V. Chernikov 2014-04-29 16:51:28 +00:00
parent 97ecaa8907
commit 68bbdd0e71
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=265096
1 changed files with 13 additions and 11 deletions
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24
usr.bin/netstat/mroute.c
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@ -236,16 +236,7 @@ mroutepr()
* functionality was deprecated, as PIM does not use it.
*/
maxvif = 0;
kresolve_list(mrl);
pmfchashtbl = mrl[N_MFCHASHTBL].n_value;
pmfctablesize = mrl[N_MFCTABLESIZE].n_value;
pviftbl = mrl[N_VIFTABLE].n_value;
if (pmfchashtbl == 0 || pmfctablesize == 0 || pviftbl == 0) {
fprintf(stderr, "No IPv4 MROUTING kernel support.\n");
return;
}
pmfchashtbl = pmfctablesize = pviftbl = 0;
len = sizeof(viftable);
if (live) {
@ -254,8 +245,19 @@ mroutepr()
warn("sysctl: net.inet.ip.viftable");
return;
}
} else
} else {
kresolve_list(mrl);
pmfchashtbl = mrl[N_MFCHASHTBL].n_value;
pmfctablesize = mrl[N_MFCTABLESIZE].n_value;
pviftbl = mrl[N_VIFTABLE].n_value;
if (pmfchashtbl == 0 || pmfctablesize == 0 || pviftbl == 0) {
fprintf(stderr, "No IPv4 MROUTING kernel support.\n");
return;
}
kread(pviftbl, (char *)viftable, sizeof(viftable));
}
banner_printed = 0;
for (vifi = 0, v = viftable; vifi < MAXVIFS; ++vifi, ++v) {