Merge branch 'manipulate-exprs' into 'master'

Add functions to iterate over the expressions of existing rules

See merge request rustwall/rustables!3

1 files changed, 14 insertions, 2 deletions

diff --git a/rustables/src/expr/masquerade.rs b/rustables/src/expr/masquerade.rs
index 66e9e0e..40565d5 100644
--- a/rustables/src/expr/masquerade.rs
+++ b/rustables/src/expr/masquerade.rs
@@ -1,12 +1,24 @@
-use super::{Expression, Rule};
+use super::{DeserializationError, Expression, Rule};
 use rustables_sys as sys;
 use std::os::raw::c_char;
 
 /// Sets the source IP to that of the output interface.
+#[derive(Debug, PartialEq)]
 pub struct Masquerade;
 
 impl Expression for Masquerade {
+    fn get_raw_name() -> *const sys::libc::c_char {
+        b"masq\0" as *const _ as *const c_char
+    }
+
+    fn from_expr(_expr: *const sys::nftnl_expr) -> Result<Self, DeserializationError>
+    where
+        Self: Sized,
+    {
+        Ok(Masquerade)
+    }
+
     fn to_expr(&self, _rule: &Rule) -> *mut sys::nftnl_expr {
-        try_alloc!(unsafe { sys::nftnl_expr_alloc(b"masq\0" as *const _ as *const c_char) })
+        try_alloc!(unsafe { sys::nftnl_expr_alloc(Self::get_raw_name()) })
     }
 }