shithub: patch

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add tinc-pingpong-race: tentative fix for ping pong involuntarily causing recalc and node deletion

--- /dev/null

+++ b/tinc-pingpong-race

@@ -1,0 +1,15 @@

+diff 5a3aea0ca8fc8ec5529a5328e6f7879ad6d976da uncommitted

+--- a//sys/src/cmd/ip/tinc.c

++++ b//sys/src/cmd/ip/tinc.c

+@@ -1301,7 +1301,10 @@

+ 	while((n = conrecv(c, f, nelem(f))) > 0){

+ 		switch(atoi(f[0])){

+ 		case PING:

+-			if(consend(c, "%d %x", PONG, rand()) < 0)

++			netlock(c);

++			n = consend(c, "%d %x", PONG, rand());

++			netunlock(c);

++			if(n < 0)

+ 				return;

+ 			continue;

+ 		case PONG: