rust: fix unnecessary_unwrap warnings

warning: called `unwrap` on `rd.pipe` after checking its variant with `is_some`
   --> src/smb/smb1.rs:858:28
    |
857 |             if rd.pipe.is_some() {
    |             -------------------- help: try: `if let Some(<item>) = rd.pipe`
858 |                 let pipe = rd.pipe.unwrap();
    |                            ^^^^^^^^^^^^^^^^
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/rust-1.93.0/index.html#unnecessary_unwrap
    = note: `#[warn(clippy::unnecessary_unwrap)]` on by default

rust/src/pop3/pop3.rs

@@ -541,26 +541,27 @@ impl POP3State {
                             flow,
                             direction::Direction::ToClient as i32,
                         );
-                        if response.status == sawp_pop3::Status::OK && tx.request.is_some() {
+                        if response.status == sawp_pop3::Status::OK {
-                            let command = tx.request.as_ref().unwrap();
+                            if let Some(command) = &tx.request {
-                            SCLogDebug!("command {:?}", command);
+                                SCLogDebug!("command {:?}", command);
-                            match &command.keyword {
+                                match &command.keyword {
-                                sawp_pop3::Keyword::STLS => {
+                                    sawp_pop3::Keyword::STLS => {
-                                    unsafe {
+                                        unsafe {
-                                        SCAppLayerRequestProtocolTLSUpgrade(flow);
+                                            SCAppLayerRequestProtocolTLSUpgrade(flow);
-                                    };
+                                        };
+                                    }
+                                    sawp_pop3::Keyword::RETR => {
+                                        // Don't hold onto the whole email body
+
+                                        // TODO: pass off to mime parser
+                                        response.data.clear();
+                                    }
+                                    sawp_pop3::Keyword::AUTH => {
+                                        SCLogDebug!("OK on AUTH, expect base64 blob");
+                                        auth_ok = true;
+                                    }
+                                    _ => {}
                                 }
-                                sawp_pop3::Keyword::RETR => {
-                                    // Don't hold onto the whole email body
-
-                                    // TODO: pass off to mime parser
-                                    response.data.clear();
-                                }
-                                sawp_pop3::Keyword::AUTH => {
-                                    SCLogDebug!("OK on AUTH, expect base64 blob");
-                                    auth_ok = true;
-                                }
-                                _ => {}
                             }
                         }
                         tx.response = Some(response);

rust/src/smb/smb1.rs

@@ -854,8 +854,7 @@ pub fn smb1_trans_request_record(state: &mut SMBState, r: &SmbRecord)
 
             /* if we have a fid, store it so the response can pick it up */
             let mut pipe_dcerpc = false;
-            if rd.pipe.is_some() {
+            if let Some(pipe) = rd.pipe {
-                let pipe = rd.pipe.unwrap();
                 state.ssn2vec_cache.put(SMBCommonHdr::from1(r, SMBHDR_TYPE_GUID),
                         pipe.fid.to_vec());