From 09dd8f99fd8598b809f4d58d4a325310b555981f Mon Sep 17 00:00:00 2001
From: Simon Ruderich <simon@ruderich.org>
Date: Tue, 18 May 2021 18:36:06 +0200
Subject: [PATCH] frontend: add Loop.HostInfoMsg()

---
 cmd/safcm/sync_info.go |  6 +-----
 frontend/conn.go       | 19 +++++++++++++++++++
 2 files changed, 20 insertions(+), 5 deletions(-)

diff --git a/cmd/safcm/sync_info.go b/cmd/safcm/sync_info.go
index 91878e8..8672a3e 100644
--- a/cmd/safcm/sync_info.go
+++ b/cmd/safcm/sync_info.go
@@ -28,17 +28,13 @@ import (
 )
 
 func (s *Sync) hostInfo(conn *rpc.Conn) ([]string, error) {
-	x, err := s.loop.SendRecv(s, conn, safcm.MsgInfoReq{
+	resp, err := s.loop.HostInfoMsg(s, conn, safcm.MsgInfoReq{
 		LogLevel:     s.config.LogLevel,
 		DetectGroups: s.config.DetectGroups,
 	})
 	if err != nil {
 		return nil, err
 	}
-	resp, ok := x.(safcm.MsgInfoResp)
-	if !ok {
-		return nil, fmt.Errorf("unexpected response %v", x)
-	}
 	if resp.Error != "" {
 		return nil, fmt.Errorf("%s", resp.Error)
 	}
diff --git a/frontend/conn.go b/frontend/conn.go
index 10f7c7b..02dfe8b 100644
--- a/frontend/conn.go
+++ b/frontend/conn.go
@@ -18,6 +18,8 @@
 package frontend
 
 import (
+	"fmt"
+
 	"ruderich.org/simon/safcm"
 	"ruderich.org/simon/safcm/rpc"
 )
@@ -45,3 +47,20 @@ func (l *Loop) SendRecv(host Host, conn *rpc.Conn, msg safcm.Msg) (
 		return x, nil
 	}
 }
+
+// HostInfoMsg sends a MsgInfoReq for host via conn and returns the resulting
+// MsgInfoResp.
+func (l *Loop) HostInfoMsg(host Host, conn *rpc.Conn, req safcm.MsgInfoReq) (
+	safcm.MsgInfoResp, error) {
+
+	var empty safcm.MsgInfoResp
+	x, err := l.SendRecv(host, conn, req)
+	if err != nil {
+		return empty, err
+	}
+	resp, ok := x.(safcm.MsgInfoResp)
+	if !ok {
+		return empty, fmt.Errorf("unexpected response %v", x)
+	}
+	return resp, nil
+}
-- 
2.45.2