feat: added fuzz (#96)

* feat: fuzzing, bug: fixed v9 field counting

---------

Co-authored-by: Michael Mileusnich <mmileusnich@gmail.com>
Co-authored-by: mikemiles-dev <michaelmileusnich@Michaels-MacBook-Air-2.local>

RELEASES.md

@@ -1,5 +1,7 @@
 # 0.5.0
 * Typos in documentation fixed.
+* Added cargo-fuzz for fuzzing.
+  * Uncovered area in V9 that could cause panic.
 
 # 0.4.9
 * Added FlowStartMilliseconds, FlowEndMilliseconds 

fuzz/.gitignore

@@ -0,0 +1,4 @@
+target
+corpus
+artifacts
+coverage

fuzz/Cargo.toml

@@ -0,0 +1,21 @@
+[package]
+name = "netflow_parser-fuzz"
+version = "0.0.0"
+publish = false
+edition = "2021"
+
+[package.metadata]
+cargo-fuzz = true
+
+[dependencies]
+libfuzzer-sys = "0.4"
+
+[dependencies.netflow_parser]
+path = ".."
+
+[[bin]]
+name = "fuzz_target_1"
+path = "fuzz_targets/fuzz_target_1.rs"
+test = false
+doc = false
+bench = false

fuzz/README.md

@@ -0,0 +1,3 @@
+```rustup default nightly```
+
+```cargo fuzz run fuzz_target_1```

fuzz/fuzz_targets/fuzz_target_1.rs

@@ -0,0 +1,8 @@
+#![no_main]
+
+use libfuzzer_sys::fuzz_target;
+use netflow_parser::NetflowParser;
+
+fuzz_target!(|data: &[u8]| {
+    NetflowParser::default().parse_bytes(data);
+});

src/variable_versions/v9.rs

@@ -285,7 +285,9 @@ pub struct OptionDataField {
 
 impl Template {
     fn get_total_size(&self) -> u16 {
-        self.fields.iter().fold(0, |acc, i| acc + i.field_length)
+        self.fields
+            .iter()
+            .fold(0, |acc, i| acc.saturating_add(i.field_length))
     }
 }