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Remove broadcast-based local discovery mechanism.

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The new local address based local discovery mechanism is technically
superior to the old broadcast-based one. In fact, the old algorithm
can technically make things worse by e.g. sending broadcasts over the
VPN itself and then selecting the VPN address as the node's UDP
address. This cannot happen with the new mechanism.

Note that this means old nodes that don't send their local addresses in
ADD_EDGE messages can't be discovered, because there is no address to
send discovery packets to. Old nodes can still discover new nodes by
sending them broadcasts, though.
This commit is contained in:
Etienne Dechamps 2014-06-29 11:01:24 +01:00
parent e16ade874d
commit 4159108971
4 changed files with 5 additions and 58 deletions
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src/net.h
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@ -126,7 +126,6 @@ extern int seconds_till_retry;
extern int addressfamily;
extern unsigned replaywin;
extern bool localdiscovery;
extern sockaddr_t localdiscovery_address;
extern listen_socket_t listen_socket[MAXSOCKETS];
extern int listen_sockets;