Add debugging for async DNS errors.

diff --git a/src/adns.c b/src/adns.c
index 758c08088bd5f6fbbe97b23afae94f1143fbbed5..f5b642aaef45ed509129aac6c23371c74405a2b5 100644 (file)
--- a/src/adns.c
+++ b/src/adns.c
@@ -145,7 +145,7 @@ struct adns_blocking_info {
 static 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);
+       logger(info->mesh, MESHLINK_WARNING, "Resolving %s port %s", info->host, info->serv);
        devtool_adns_resolve_probe();
 
        struct addrinfo hint = {
@@ -153,7 +153,10 @@ static void *adns_blocking_handler(void *data) {
                .ai_socktype = info->socktype,
        };
 
-       if(getaddrinfo(info->host, info->serv, &hint, &info->ai)) {
+       int result = getaddrinfo(info->host, info->serv, &hint, &info->ai);
+
+       if(result) {
+               logger(info->mesh, MESHLINK_ERROR, "getaddrinfo(%s, %s) returned an error: %s", info->host, info->serv, gai_strerror(result));
                info->ai = NULL;
        }
 
@@ -164,8 +167,11 @@ static void *adns_blocking_handler(void *data) {
        bool cleanup = info->done;
 
        if(!info->done) {
+               logger(info->mesh, MESHLINK_WARNING, "getaddrinfo(%s, %s) returned before waiter timed out", info->host, info->serv);
                info->done = true;
                pthread_cond_signal(&info->cond);
+       } else {
+               logger(info->mesh, MESHLINK_WARNING, "getaddrinfo(%s, %s) returned after waiter timed out", info->host, info->serv);
        }
 
        pthread_mutex_unlock(&info->mutex);
@@ -193,6 +199,8 @@ struct addrinfo *adns_blocking_request(meshlink_handle_t *mesh, char *host, char
        clock_gettime(CLOCK_REALTIME, &deadline);
        deadline.tv_sec += timeout;
 
+       logger(mesh, MESHLINK_WARNING, "Starting blocking DNS request for %s port %s", host, serv);
+
        pthread_t thread;
 
        if(pthread_create(&thread, NULL, adns_blocking_handler, info)) {
@@ -214,9 +222,10 @@ struct addrinfo *adns_blocking_request(meshlink_handle_t *mesh, char *host, char
        bool cleanup = info->done;
 
        if(info->done) {
+               logger(mesh, MESHLINK_WARNING, "DNS request for %s port %s fulfilled in time, ai = %p", host, serv, (void *)info->ai);
                result = info->ai;
        } else {
-               logger(mesh, MESHLINK_WARNING, "Deadline passed for DNS request %s port %s", host, serv);
+               logger(mesh, MESHLINK_ERROR, "Deadline passed for DNS request %s port %s, ai = %p", host, serv, (void *)info->ai);
                info->done = true;
        }