From: Yu <jiung.yu@samsung.com>
Date: Tue, 26 Feb 2019 02:13:07 +0000 (+0900)
Subject: Initialize ARES channel and start DNS lookup
X-Git-Tag: submit/tizen/20190314.071214~4
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=refs%2Fchanges%2F09%2F200509%2F7;p=platform%2Fcore%2Fconnectivity%2Finm-manager.git

Initialize ARES channel and start DNS lookup

Change-Id: I34698eba3ddd60ead9b095dc20cdfd0a49371241
Signed-off-by: Yu Jiung <jiung.yu@samsung.com>
---

diff --git a/src/inm-dns-lookup.c b/src/inm-dns-lookup.c
index 0d94b8a..076c839 100644
--- a/src/inm-dns-lookup.c
+++ b/src/inm-dns-lookup.c
@@ -33,9 +33,12 @@
 #include "inm-dns-lookup.h"
 
 #define ARES_DEFAULT_TIMEOUT_MS 1000
+#define ARES_DEFAULT_TRY 4
 #define DEFAULT_TEST_URL "www.tizen.org"
 
 typedef struct {
+	ares_channel channel;
+	struct ares_options *ch_options;
 	guint timer_source_id;
 	inm_default_dns_lookup_callback cb;
 	gpointer cb_user_data;
@@ -43,9 +46,49 @@ typedef struct {
 
 static inm_dns_lookup_s *g_default_dns_lookup_data;
 
+static inline void __destroy_default_dns_lookup_data();
+
+static int __ares_set_opt(inm_dns_lookup_s *lookup_data)
+{
+	struct ares_options *p_opts = NULL;
+
+	p_opts = g_try_malloc0(sizeof(struct ares_options));
+	if (!p_opts) {
+		INM_LOGI("");
+		return -1;
+	}
+
+	p_opts->timeout = ARES_DEFAULT_TIMEOUT_MS;
+	p_opts->tries = ARES_DEFAULT_TRY;
+
+	lookup_data->ch_options = p_opts;
+
+	return 0;
+}
+
+static inline int __init_ares_channel(inm_dns_lookup_s *dns_lookup_data)
+{
+	ares_channel ch;
+	int opt_mask = 0;
+	int ret;
+
+	opt_mask = ARES_OPT_TIMEOUTMS | ARES_OPT_TRIES | ARES_OPT_SOCK_STATE_CB;
+	ret = ares_init_options(&ch, dns_lookup_data->ch_options, opt_mask);
+	if (ret != ARES_SUCCESS) {
+		PRINT_LOG("ares_init_options: %s\n", ares_strerror(ret));
+		ares_destroy(ch);
+		return -1;
+	}
+
+	dns_lookup_data->channel = ch;
+
+	return 0;
+}
+
 static inline int __create_default_dns_lookup_data()
 {
 	inm_dns_lookup_s *dns_lookup_data = NULL;
+	int ret;
 
 	dns_lookup_data = g_try_malloc0(sizeof(inm_dns_lookup_s));
 	if (!dns_lookup_data) {
@@ -53,10 +96,41 @@ static inline int __create_default_dns_lookup_data()
 		return -1;
 	}
 
+	ret = __ares_set_opt(dns_lookup_data);
+	if (ret != 0) {
+		INM_LOGI("");
+		g_free(dns_lookup_data);
+		return -1;
+	}
+	ret = __init_ares_channel(dns_lookup_data);
+	if (ret != 0) {
+		INM_LOGI("");
+		g_free(dns_lookup_data->ch_options);
+		g_free(dns_lookup_data);
+		return -1;
+	}
+
 	g_default_dns_lookup_data = dns_lookup_data;
 	return 0;
 }
 
+static inline void __deinit_ares_channel(inm_dns_lookup_s *dns_lookup_data)
+{
+	__INM_FUNC_ENTER__;
+
+	if (!dns_lookup_data) {
+		__INM_FUNC_EXIT__;
+		return;
+	}
+
+	g_free(dns_lookup_data->ch_options);
+	ares_destroy(dns_lookup_data->channel);
+	dns_lookup_data->channel = NULL;
+
+	__INM_FUNC_EXIT__;
+	return;
+}
+
 static inline void __destroy_default_dns_lookup_data()
 {
 	inm_dns_lookup_s *dns_lookup_data;
@@ -71,10 +145,40 @@ static inline void __destroy_default_dns_lookup_data()
 
 	REMOVE_G_SOURCE(dns_lookup_data->timer_source_id);
 
+	__deinit_ares_channel(dns_lookup_data);
+	g_free(dns_lookup_data);
+
 	__INM_FUNC_EXIT__;
 	return;
 }
 
+static void __ares_host_cb(void *arg, int status, int timeouts, struct hostent *p_host)
+{
+	inm_dns_lookup_s *dns_lookup_data;
+	int err = INM_DNS_LOOKUP_ERROR_NONE;
+	gboolean result = TRUE;
+
+	__INM_FUNC_ENTER__;
+	if (!g_default_dns_lookup_data) {
+		__INM_FUNC_EXIT__;
+		return;
+	}
+
+	PRINT_LOG("status %s", ares_strerror(status));
+	dns_lookup_data = (inm_dns_lookup_s *)arg;
+	if (!p_host || status != ARES_SUCCESS) {
+		err = INM_DNS_LOOKUP_ERROR_OPERATION_FAILED;
+		result = FALSE;
+	}
+
+	dns_lookup_data->cb(err,
+			result,
+			p_host ? p_host->h_name : NULL,
+			dns_lookup_data->cb_user_data);
+
+	__INM_FUNC_EXIT__;
+}
+
 static gboolean __default_dns_lookup_timer_cb(gpointer user_data)
 {
 	inm_dns_lookup_s *dns_lookup_data;
@@ -124,14 +228,27 @@ int inm_default_dns_lookup_start(inm_default_dns_lookup_callback cb, gpointer us
 					__default_dns_lookup_timer_cb,
 					NULL);
 
+	ares_gethostbyname(g_default_dns_lookup_data->channel,
+			DEFAULT_TEST_URL,
+			AF_INET,
+			__ares_host_cb,
+			(void *)g_default_dns_lookup_data);
+
 	return 0;
 }
 
 int inm_dns_lookup_init()
 {
+	int ret;
 	int version;
 
 	INM_LOGI("c-ares version %s", ares_version(&version));
+	ret = ares_library_init(ARES_LIB_INIT_ALL);
+	if (ret != ARES_SUCCESS) {
+		INM_LOGE("Lib init failed %s",
+				  ares_strerror(ret));
+		return INM_DNS_LOOKUP_ERROR_OPERATION_FAILED;
+	}
 
 	return INM_DNS_LOOKUP_ERROR_NONE;
 }