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Always call res_init() before getaddrinfo().

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Unfortunately, glibc assumes that /etc/resolv.conf is a static file that
never changes. Even on servers, /etc/resolv.conf might be a dynamically
generated file, and we never know when it changes. So just call
res_init() every time, so glibc uses up-to-date nameserver information.

Conflicts:
	src/have.h
	src/net.c
	src/net_setup.c
This commit is contained in:
Guus Sliepen 2015-04-12 15:42:48 +02:00
commit 95921696a4
5 changed files with 21 additions and 17 deletions
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14
doc/tinc.conf.5.in
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@ -464,10 +464,10 @@ and
.Ev REMOTEPORT
are available.
.El
.It Va ReplayWindow Li = Ar bytes Pq 16
.It Va ReplayWindow Li = Ar bytes Pq 32
This is the size of the replay tracking window for each remote node, in bytes.
The window is a bitfield which tracks 1 packet per bit, so for example
the default setting of 16 will track up to 128 packets in the window. In high
the default setting of 32 will track up to 256 packets in the window. In high
bandwidth scenarios, setting this to a higher value can reduce packet loss from
the interaction of replay tracking with underlying real packet loss and/or
reordering. Setting this to zero will disable replay tracking completely and
@ -502,12 +502,14 @@ If tinc doesn't receive any UDP ping replies over the specified interval,
it will assume UDP communication is broken and will fall back to TCP.
.It Va UDPInfoInterval Li = Ar seconds Pq 5
The minimum amount of time between sending periodic updates about UDP addresses, which are mostly useful for UDP hole punching.
.It Va UDPRcvBuf Li = Ar bytes Pq OS default
.It Va UDPRcvBuf Li = Ar bytes Pq 1048576
Sets the socket receive buffer size for the UDP socket, in bytes.
If unset, the default buffer size will be used by the operating system.
.It Va UDPSndBuf Li = Ar bytes Pq OS default
If set to zero, the default buffer size will be used by the operating system.
Note: this setting can have a significant impact on performance, especially raw throughput.
.It Va UDPSndBuf Li = Ar bytes Pq 1048576
Sets the socket send buffer size for the UDP socket, in bytes.
If unset, the default buffer size will be used by the operating system.
If set to zero, the default buffer size will be used by the operating system.
Note: this setting can have a significant impact on performance, especially raw throughput.
.El
.Sh HOST CONFIGURATION FILES
The host configuration files contain all information needed