From 42e21846f5a23b4ac47fb487d616c1fcbbb2a674 Mon Sep 17 00:00:00 2001
From: Uwe Seimet <Uwe.Seimet@seimet.de>
Date: Fri, 26 Jan 2024 12:41:23 +0100
Subject: [PATCH] Extract method

---
 cpp/devices/ctapdriver.cpp | 57 +++++++++++++++++++++++---------------
 cpp/devices/ctapdriver.h   |  2 +-
 2 files changed, 35 insertions(+), 24 deletions(-)

diff --git a/cpp/devices/ctapdriver.cpp b/cpp/devices/ctapdriver.cpp
index 82558cf7..c81b7ded 100644
--- a/cpp/devices/ctapdriver.cpp
+++ b/cpp/devices/ctapdriver.cpp
@@ -171,35 +171,32 @@ bool CTapDriver::Init(const param_map &const_params)
 
 void CTapDriver::CleanUp() const
 {
-    if (tap_fd != -1) {
-        if (const int fd = socket(AF_LOCAL, SOCK_STREAM, 0); fd == -1) {
-            LogErrno("Can't open bridge socket");
-        } else {
-            trace(">brctl delif " + BRIDGE_NAME + " " + BRIDGE_INTERFACE_NAME);
-            if (const string error = br_setif(fd, BRIDGE_NAME, BRIDGE_INTERFACE_NAME, false); !error.empty()) {
-                warn("Removing " + BRIDGE_INTERFACE_NAME + " from the bridge failed: " + error);
-                warn("You may need to manually remove the tap device");
-            }
+    if (tap_fd == -1) {
+        return;
+    }
 
-            trace(">ip link set dev " + BRIDGE_NAME + " down");
-            if (const string error = ip_link(fd, BRIDGE_NAME.c_str(), false); !error.empty()) {
-                warn(error);
-            }
+    if (const int fd = socket(AF_LOCAL, SOCK_STREAM, 0); fd == -1) {
+        LogErrno("Can't open bridge socket");
+    } else {
+        trace(">brctl delif " + BRIDGE_NAME + " " + BRIDGE_INTERFACE_NAME);
+        if (const string error = br_setif(fd, BRIDGE_NAME, BRIDGE_INTERFACE_NAME, false); !error.empty()) {
+            warn("Removing " + BRIDGE_INTERFACE_NAME + " from the bridge failed: " + error);
+            warn("You may need to manually remove the tap device");
+        }
 
-#ifdef __linux__
-            if (bridge_created) {
-                trace(">brctl delbr " + BRIDGE_NAME);
-                if (ioctl(fd, SIOCBRDELBR, BRIDGE_NAME.c_str()) == -1) {
-                    warn("Removing " + BRIDGE_NAME + " failed: " + strerror(errno));
-                }
-            }
-#endif
+        trace(">ip link set dev " + BRIDGE_NAME + " down");
+        if (const string error = ip_link(fd, BRIDGE_NAME.c_str(), false); !error.empty()) {
+            warn(error);
+        }
 
-            close(fd);
+        if (const string error = DeleteBridge(fd); !error.empty()) {
+            warn(error);
         }
 
-        close(tap_fd);
+        close(fd);
     }
+
+    close(tap_fd);
 }
 
 param_map CTapDriver::GetDefaultParams() const
@@ -303,6 +300,20 @@ string CTapDriver::AddBridge(int fd)
     return "";
 }
 
+string CTapDriver::DeleteBridge(int fd) const
+{
+#ifdef __linux__
+    if (bridge_created) {
+        trace(">brctl delbr " + BRIDGE_NAME);
+        if (ioctl(fd, SIOCBRDELBR, BRIDGE_NAME.c_str()) == -1) {
+            return "Removing " + BRIDGE_NAME + " failed: " + strerror(errno);
+        }
+    }
+#endif
+
+    return "";
+}
+
 string CTapDriver::IpLink(bool enable)
 {
     const int fd = socket(PF_INET, SOCK_DGRAM, 0);
diff --git a/cpp/devices/ctapdriver.h b/cpp/devices/ctapdriver.h
index b9d674f0..65d30181 100644
--- a/cpp/devices/ctapdriver.h
+++ b/cpp/devices/ctapdriver.h
@@ -58,8 +58,8 @@ class CTapDriver
         return BRIDGE_NAME;
     }
 
-    // Add the piscsi_bridge bridge
     static string AddBridge(int);
+    string DeleteBridge(int) const;
 
     // Enable/Disable the piscsi0 interface
     static string IpLink(bool);