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Decrement TTL of incoming packets.

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Tinc will now, by default, decrement the TTL field of incoming IPv4 and IPv6
packets, before forwarding them to the virtual network device or to another
node. Packets with a TTL value of zero will be dropped, and an ICMP Time
Exceeded message will be sent back.

This behaviour can be disabled using the DecrementTTL option.
This commit is contained in:
Guus Sliepen 2012-02-20 16:34:02 +01:00
parent 6289859ab3
commit 0233b1d710
5 changed files with 67 additions and 0 deletions
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2
src/net_setup.c
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@ -398,6 +398,8 @@ static bool setup_myself(void) {
get_config_bool(lookup_config(config_tree, "PriorityInheritance"), &priorityinheritance);
get_config_bool(lookup_config(config_tree, "DecrementTTL"), &decrement_ttl);
#if !defined(SOL_IP) || !defined(IP_TOS)
if(priorityinheritance)
logger(LOG_WARNING, "%s not supported on this platform", "PriorityInheritance");