From: Guus Sliepen <guus@meshlink.io>
Date: Sat, 11 Apr 2020 14:33:22 +0000 (+0200)
Subject: Add a probe point for async DNS resolving.
X-Git-Url: http://git.meshlink.io/?p=meshlink;a=commitdiff_plain;h=f13c6d9a4dbfce011fc4c3a5260b38b9a2a4fcc5

Add a probe point for async DNS resolving.
---

diff --git a/src/adns.c b/src/adns.c
index 2776a4c5..8181140d 100644
--- a/src/adns.c
+++ b/src/adns.c
@@ -23,6 +23,7 @@
 #include <stdatomic.h>
 
 #include "adns.h"
+#include "devtools.h"
 #include "logger.h"
 #include "xalloc.h"
 
@@ -48,6 +49,7 @@ static void *adns_loop(void *data) {
 
 		if(time(NULL) < item->deadline) {
 			logger(mesh, MESHLINK_DEBUG, "Resolving %s port %s", item->host, item->serv);
+			devtool_adns_resolve_probe();
 			int result = getaddrinfo(item->host, item->serv, NULL, &item->ai);
 
 			if(result) {
@@ -143,6 +145,7 @@ void *adns_blocking_handler(void *data) {
 	struct adns_blocking_info *info = data;
 
 	logger(info->mesh, MESHLINK_DEBUG, "Resolving %s port %s", info->host, info->serv);
+	devtool_adns_resolve_probe();
 
 	if(getaddrinfo(info->host, info->serv, NULL, &info->ai)) {
 		info->ai = NULL;
diff --git a/src/devtools.c b/src/devtools.c
index 5a49e3a8..5bd06180 100644
--- a/src/devtools.c
+++ b/src/devtools.c
@@ -30,7 +30,7 @@
 
 #include "devtools.h"
 
-static void trybind_nop_probe(void) {
+static void nop_probe(void) {
 	return;
 }
 
@@ -44,9 +44,10 @@ static void inviter_commits_first_nop_probe(bool stage) {
 	return;
 }
 
-void (*devtool_trybind_probe)(void) = trybind_nop_probe;
+void (*devtool_trybind_probe)(void) = nop_probe;
 void (*devtool_keyrotate_probe)(int stage) = keyrotate_nop_probe;
 void (*devtool_set_inviter_commits_first)(bool inviter_commited_first) = inviter_commits_first_nop_probe;
+void (*devtool_adns_resolve_probe)(void) = nop_probe;
 
 /* Return an array of edges in the current network graph.
  * Data captures the current state and will not be updated.
diff --git a/src/devtools.h b/src/devtools.h
index 6d0b4989..79aef33a 100644
--- a/src/devtools.h
+++ b/src/devtools.h
@@ -166,6 +166,9 @@ extern void (*devtool_trybind_probe)(void);
  */
 extern void (*devtool_keyrotate_probe)(int stage);
 
+/// Debug function pointer variable for asynchronous DNS resolving
+extern void (*devtool_adns_resolve_probe)(void);
+
 /// Debug function pointer variable for asserting inviter/invitee committing sequence
 /** This function pointer variable is a userspace tracepoint or debugger callback which
  *  invokes either after inviter writing invitees host file into the disk