From: Guus Sliepen <guus@tinc-vpn.org>
Date: Thu, 23 Feb 2012 12:26:01 +0000 (+0100)
Subject: Merge branch 'master' of git://tinc-vpn.org/tinc into 1.1
X-Git-Tag: import-tinc-1.1~402
X-Git-Url: http://git.meshlink.io/?p=meshlink;a=commitdiff_plain;h=f5dc136cfd7a3a195b75f7174722734e25f30fd9

Merge branch 'master' of git://tinc-vpn.org/tinc into 1.1

Conflicts:
	src/net.c
	src/net_packet.c
	src/net_socket.c
---

f5dc136cfd7a3a195b75f7174722734e25f30fd9
diff --cc src/net_packet.c
index f7d86403,18a898d3..64b0f8e8
--- a/src/net_packet.c
+++ b/src/net_packet.c
@@@ -65,13 -65,19 +66,20 @@@ bool localdiscovery = false
  
  #define MAX_SEQNO 1073741824
  
- // mtuprobes == 1..30: initial discovery, send bursts with 1 second interval
- // mtuprobes ==    31: sleep pinginterval seconds
- // mtuprobes ==    32: send 1 burst, sleep pingtimeout second
- // mtuprobes ==    33: no response from other side, restart PMTU discovery process
+ /* mtuprobes == 1..30: initial discovery, send bursts with 1 second interval
+    mtuprobes ==    31: sleep pinginterval seconds
+    mtuprobes ==    32: send 1 burst, sleep pingtimeout second
+    mtuprobes ==    33: no response from other side, restart PMTU discovery process
+ 
+    Probes are sent in batches of three, with random sizes between the lower and
+    upper boundaries for the MTU thus far discovered.
+ 
+    In case local discovery is enabled, a fourth packet is added to each batch,
+    which will be broadcast to the local network.
+ */
  
 -void send_mtu_probe(node_t *n) {
 +static void send_mtu_probe_handler(int fd, short events, void *data) {
 +	node_t *n = data;
  	vpn_packet_t packet;
  	int len, i;
  	int timeout = 1;
@@@ -129,9 -136,9 +137,9 @@@
  			len = 64;
  		
  		memset(packet.data, 0, 14);
 -		RAND_pseudo_bytes(packet.data + 14, len - 14);
 +		randomize(packet.data + 14, len - 14);
  		packet.len = len;
- 		packet.priority = 0;
+ 		packet.priority = i < 3 ? 0 : -1;
  
  		ifdebug(TRAFFIC) logger(LOG_INFO, "Sending MTU probe length %d to %s (%s)", len, n->name, n->hostname);
  
diff --cc src/net_socket.c
index 730cf6b8,94db11c0..28206697
--- a/src/net_socket.c
+++ b/src/net_socket.c
@@@ -209,7 -210,8 +209,8 @@@ int setup_vpn_in_socket(const sockaddr_
  #endif
  
  	option = 1;
 -	setsockopt(nfd, SOL_SOCKET, SO_REUSEADDR, (void *)&option, sizeof(option));
 -	setsockopt(nfd, SOL_SOCKET, SO_BROADCAST, (void *)&option, sizeof(option));
 +	setsockopt(nfd, SOL_SOCKET, SO_REUSEADDR, (void *)&option, sizeof option);
++	setsockopt(nfd, SOL_SOCKET, SO_BROADCAST, (void *)&option, sizeof option);
  
  	if(udp_rcvbuf && setsockopt(nfd, SOL_SOCKET, SO_RCVBUF, (void *)&udp_rcvbuf, sizeof(udp_rcvbuf)))
  		logger(LOG_WARNING, "Can't set UDP SO_RCVBUF to %i: %s", udp_rcvbuf, strerror(errno));
diff --cc src/node.h
index 4464011f,d1cb97f7..e86aa6a0
--- a/src/node.h
+++ b/src/node.h
@@@ -62,13 -66,13 +62,14 @@@ typedef struct node_t 
  	int incompression;			/* Compressionlevel, 0 = no compression */
  	int outcompression;			/* Compressionlevel, 0 = no compression */
  
 +	int distance;
  	struct node_t *nexthop;			/* nearest node from us to him */
+ 	struct edge_t *prevedge;		/* nearest node from him to us */
  	struct node_t *via;			/* next hop for UDP packets */
  
 -	avl_tree_t *subnet_tree;		/* Pointer to a tree of subnets belonging to this node */
 +	splay_tree_t *subnet_tree;		/* Pointer to a tree of subnets belonging to this node */
  
 -	avl_tree_t *edge_tree;			/* Edges with this node as one of the endpoints */
 +	splay_tree_t *edge_tree;			/* Edges with this node as one of the endpoints */
  
  	struct connection_t *connection;	/* Connection associated with this node (if a direct connection exists) */