diff --git a/src/ffi.rs b/src/ffi.rs
index 37fa519..e59b60a 100644
--- a/src/ffi.rs
+++ b/src/ffi.rs
@@ -45,7 +45,7 @@ pub fn disable_internal_nscd() {
     }
 }
 
-mod ffi {
+mod glibcffi {
     use nix::libc;
     extern "C" {
         pub fn gethostbyname2_r (
@@ -178,7 +178,7 @@ pub fn gethostbyname2_r(name: String, af: libc::c_int) -> anyhow::Result<Hostent
     let mut hostent_result  = ptr::null_mut();
     let ret: i32 = loop {
         let ret = unsafe {
-            ffi::gethostbyname2_r(
+            glibcffi::gethostbyname2_r(
                 name.as_ptr(),
                 af,
                 &mut ret_hostent,
diff --git a/src/handlers.rs b/src/handlers.rs
index bc37d73..a7b9ef9 100644
--- a/src/handlers.rs
+++ b/src/handlers.rs
@@ -22,8 +22,8 @@ use std::os::unix::ffi::OsStrExt;
 
 use anyhow::{bail, Context, Result};
 use atoi::atoi;
-use dns_lookup::{getaddrinfo, getnameinfo, AddrInfoHints};
-use nix::libc::{AF_INET6, NI_NUMERICSERV, SOCK_STREAM};
+use dns_lookup::getnameinfo;
+use nix::libc::NI_NUMERICSERV;
 use nix::sys::socket::AddressFamily;
 use nix::unistd::{getgrouplist, Gid, Group, Uid, User};
 use slog::{debug, error, Logger};
@@ -433,7 +433,7 @@ impl Host {
             } else {
                 16
             },
-            h_addr_list_cnt: num_addrs as i32,
+            h_addr_list_cnt: num_addrs,
             error: if has_addrs {
                 0
             } else {
@@ -441,7 +441,7 @@ impl Host {
             },
         };
 
-        let total_len = 4 * 8 + hostname_c_string_len as i32 + buf_addrs.len() as i32;
+        let total_len = 4 * 8 + hostname_c_string_len + buf_addrs.len() as i32;
         let mut buf = Vec::with_capacity(total_len as usize);
 
         // add header
diff --git a/src/protocol.rs b/src/protocol.rs
index 9bde033..0176334 100644
--- a/src/protocol.rs
+++ b/src/protocol.rs
@@ -266,7 +266,7 @@ impl HstResponseHeader {
     }
 
     /// Return the serialized header as vector of bytes
-    pub fn to_vec(&self) -> Vec<u8> {
+    pub fn to_vec(self) -> Vec<u8> {
         self.as_slice().to_vec()
     }
 
@@ -275,10 +275,10 @@ impl HstResponseHeader {
         found: 0,
         h_name_len: 0,
         h_aliases_cnt: 0,
-        h_addrtype: -1 as i32,
-        h_length: -1 as i32,
+        h_addrtype: -1,
+        h_length: -1,
         h_addr_list_cnt: 0,
-        error: H_ERRNO_HOST_NOT_FOUND as i32,
+        error: H_ERRNO_HOST_NOT_FOUND,
     };
 
     pub const ERRNO_NETDB_INTERNAL: Self = Self {
@@ -286,9 +286,9 @@ impl HstResponseHeader {
         found: 0,
         h_name_len: 0,
         h_aliases_cnt: 0,
-        h_addrtype: -1 as i32,
-        h_length: -1 as i32,
-        h_addr_list_cnt: H_ERRNO_NETDB_INTERNAL as i32,
+        h_addrtype: -1,
+        h_length: -1,
+        h_addr_list_cnt: H_ERRNO_NETDB_INTERNAL,
         error: 0,
     };
 }