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ip_reass: provide sysctl MIB returning IP fragment TTL

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For now it is read-only, but eventually the cycle that goes over
all fragments should be refactored and this MIB should also become
read/write.

This MIB will allow SNMP daemons to implement MIB-II ipReasmTimeout MIB
straightfoward.  Right now net-snmp compilation is broken by 1922eb3e9c.
The base system bsnmpd is not broken just because it ignored PR_SLOWTIMO,
and thus always returned incorrectly doubled value for ipReasmTimeout.
This commit is contained in:
Gleb Smirnoff 2022-08-20 13:33:39 -07:00
parent f829268bcc
commit 8338690a0a
1 changed files with 4 additions and 0 deletions
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4
sys/netinet/ip_reass.c
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@ -167,6 +167,10 @@ SYSCTL_PROC(_net_inet_ip, OID_AUTO, maxfragbucketsize,
sysctl_maxfragbucketsize, "I",
"Maximum number of IPv4 fragment reassembly queue entries per bucket");
static u_int ipfragttl = IPFRAGTTL / 2;
SYSCTL_UINT(_net_inet_ip, OID_AUTO, fragttl, CTLFLAG_RD, &ipfragttl,
IPFRAGTTL / 2, "IP fragment life time on reassembly queue");
/*
* Take incoming datagram fragment and try to reassemble it into
* whole datagram. If the argument is the first fragment or one