[PATCH 5/7] dnsproxy: support programmatic configuration of the default listen port

[matthias.gerstner@suse.de]

From: Matthias Gerstner <matthias.gerstner@suse.de>

This way a test instance of dnsproxy can be setup that listens on an
unprivileged port for easier testing as non-root.
---
 src/connman.h  |  1 +
 src/dnsproxy.c | 10 ++++++++--
 2 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/src/connman.h b/src/connman.h
index 68176086..909b53ae 100644
--- a/src/connman.h
+++ b/src/connman.h
@@ -983,6 +983,7 @@ void __connman_dnsproxy_remove_listener(int index);
 int __connman_dnsproxy_append(int index, const char *domain, const char *server);
 int __connman_dnsproxy_remove(int index, const char *domain, const char *server);
 int __connman_dnsproxy_set_mdns(int index, bool enabled);
+void __connman_dnsproxy_set_listen_port(unsigned int port);
 
 int __connman_6to4_probe(struct connman_service *service);
 void __connman_6to4_remove(struct connman_ipconfig *ipconfig);
diff --git a/src/dnsproxy.c b/src/dnsproxy.c
index d04057fa..f862c788 100644
--- a/src/dnsproxy.c
+++ b/src/dnsproxy.c
@@ -223,6 +223,7 @@ static GHashTable *listener_table = NULL;
 static time_t next_refresh;
 static GHashTable *partial_tcp_req_table;
 static guint cache_timer = 0;
+static in_port_t dns_listen_port = 53;
 
 static guint16 get_id(void)
 {
@@ -3704,7 +3705,7 @@ static GIOChannel *get_listener(int family, int protocol, int index)
 	if (family == AF_INET6) {
 		memset(&s.sin6, 0, sizeof(s.sin6));
 		s.sin6.sin6_family = AF_INET6;
-		s.sin6.sin6_port = htons(53);
+		s.sin6.sin6_port = htons(dns_listen_port);
 		slen = sizeof(s.sin6);
 
 		if (__connman_inet_get_interface_address(index,
@@ -3721,7 +3722,7 @@ static GIOChannel *get_listener(int family, int protocol, int index)
 	} else if (family == AF_INET) {
 		memset(&s.sin, 0, sizeof(s.sin));
 		s.sin.sin_family = AF_INET;
-		s.sin.sin_port = htons(53);
+		s.sin.sin_port = htons(dns_listen_port);
 		slen = sizeof(s.sin);
 
 		if (__connman_inet_get_interface_address(index,
@@ -4050,3 +4051,8 @@ void __connman_dnsproxy_cleanup(void)
 	if (ipv6_resolve)
 		g_resolv_unref(ipv6_resolve);
 }
+
+void __connman_dnsproxy_set_listen_port(unsigned int port)
+{
+	dns_listen_port = port;
+}
-- 
2.34.1