Update error handling

uweseimet · Mar 14, 2024 · 4bac83a · 4bac83a
1 parent 429b5d6
commit 4bac83a
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/cpp/devices/tap_driver.cpp b/cpp/devices/tap_driver.cpp
@@ -283,8 +283,13 @@ string TapDriver::DeleteBridge(int fd) const
 string TapDriver::IpLink(bool up)
 {
     const int fd = socket(PF_INET, SOCK_DGRAM, 0);
+    if (fd == -1) {
+        return fmt::format("Can't create socket: {}", strerror(errno));
+    }
+
     trace(string(">ip link set " + BRIDGE_INTERFACE_NAME + " ") + (up ? "up" : "down"));
     const string result = IpLink(fd, BRIDGE_INTERFACE_NAME, up);
+
     close(fd);
 
     return result;