submission: Move client_proxy_start() to submission-backend-relay.c.

src/submission/submission-backend-relay.c

@@ -677,3 +677,41 @@ int cmd_quit_relay(struct client *client, struct smtp_server_cmd_ctx *cmd)
 		relay_cmd_quit_proxy(quit_cmd);
 	return 0;
 }
+
+/*
+ * Relay backend
+ */
+
+static void client_proxy_ready_cb(const struct smtp_reply *reply,
+				  void *context)
+{
+	struct client *client = context;
+	enum smtp_capability caps;
+
+	/* check proxy status */
+	if ((reply->status / 100) != 2) {
+		i_error("Failed to establish relay connection: %s",
+			smtp_reply_log(reply));
+		client_destroy(client,
+			"4.4.0", "Failed to establish relay connection");
+		return;
+	}
+
+	/* propagate capabilities */
+	caps = smtp_client_connection_get_capabilities(client->proxy_conn);
+	caps |= SMTP_CAPABILITY_AUTH | SMTP_CAPABILITY_PIPELINING |
+		SMTP_CAPABILITY_SIZE | SMTP_CAPABILITY_ENHANCEDSTATUSCODES |
+		SMTP_CAPABILITY_CHUNKING | SMTP_CAPABILITY_BURL |
+		SMTP_CAPABILITY_VRFY;
+	caps &= SUBMISSION_SUPPORTED_SMTP_CAPABILITIES;
+	smtp_server_connection_set_capabilities(client->conn, caps);
+
+	/* now that we know our capabilities, commence server protocol dialog */
+	smtp_server_connection_resume(client->conn);
+}
+
+void client_proxy_start(struct client *client)
+{
+	smtp_client_connection_connect(client->proxy_conn,
+		client_proxy_ready_cb, client);
+}

src/submission/submission-backend-relay.h

@@ -16,4 +16,6 @@ int cmd_vrfy_relay(struct client *client, struct smtp_server_cmd_ctx *cmd,
 int cmd_noop_relay(struct client *client, struct smtp_server_cmd_ctx *cmd);
 int cmd_quit_relay(struct client *client, struct smtp_server_cmd_ctx *cmd);
 
+void client_proxy_start(struct client *client);
+
 #endif

src/submission/submission-client.c

@@ -23,6 +23,7 @@
 #include "smtp-client.h"
 #include "smtp-client-connection.h"
 
+#include "submission-backend-relay.h"
 #include "submission-commands.h"
 #include "submission-settings.h"
 
@@ -82,40 +83,6 @@ static const char *client_remote_id(struct client *client)
 	return addr;
 }
 
-static void client_proxy_ready_cb(const struct smtp_reply *reply,
-				  void *context)
-{
-	struct client *client = context;
-	enum smtp_capability caps;
-
-	/* check proxy status */
-	if ((reply->status / 100) != 2) {
-		i_error("Failed to establish relay connection: %s",
-			smtp_reply_log(reply));
-		client_destroy(client,
-			"4.4.0", "Failed to establish relay connection");
-		return;
-	}
-
-	/* propagate capabilities */
-	caps = smtp_client_connection_get_capabilities(client->proxy_conn);
-	caps |= SMTP_CAPABILITY_AUTH | SMTP_CAPABILITY_PIPELINING |
-		SMTP_CAPABILITY_SIZE | SMTP_CAPABILITY_ENHANCEDSTATUSCODES |
-		SMTP_CAPABILITY_CHUNKING | SMTP_CAPABILITY_BURL |
-		SMTP_CAPABILITY_VRFY;
-	caps &= SUBMISSION_SUPPORTED_SMTP_CAPABILITIES;
-	smtp_server_connection_set_capabilities(client->conn, caps);
-
-	/* now that we know our capabilities, commence server protocol dialog */
-	smtp_server_connection_resume(client->conn);
-}
-
-static void client_proxy_start(struct client *client)
-{
-	smtp_client_connection_connect(client->proxy_conn,
-		client_proxy_ready_cb, client);
-}
-
 static void client_proxy_create(struct client *client,
 				const struct submission_settings *set)
 {