diff --git a/src/header/netdb/lookup.rs b/src/header/netdb/lookup.rs
index 0734eec6..ccb00b65 100644
--- a/src/header/netdb/lookup.rs
+++ b/src/header/netdb/lookup.rs
@@ -17,10 +17,11 @@ use crate::header::{
     netinet_in::{IPPROTO_UDP, in_addr, sockaddr_in},
     sys_socket::{
         self,
-        constants::{AF_INET, SOCK_DGRAM},
+        constants::{AF_INET, SOCK_DGRAM, SOL_SOCKET, SO_RCVTIMEO},
         sockaddr,
     },
     time,
+    sys_select::timeval,
 };
 
 use super::{
@@ -89,11 +90,34 @@ pub fn lookup_host(host: &str) -> Result<LookupHost, c_int> {
             drop(Box::from_raw(packet_data_ptr));
         }
 
-        let i = 0 as socklen_t;
         let mut buf = vec![0u8; 65536];
         let buf_ptr = buf.as_mut_ptr().cast::<c_void>();
 
-        let count = unsafe { sys_socket::recv(sock, buf_ptr, 65536, 0) };
+        // Set 5s recv timeout (best-effort; if this fails, recv may block longer).
+        let tv = timeval {
+            tv_sec: 5,
+            tv_usec: 0,
+        };
+        unsafe {
+            sys_socket::setsockopt(
+                sock,
+                SOL_SOCKET,
+                SO_RCVTIMEO,
+                &tv as *const timeval as *const c_void,
+                core::mem::size_of::<timeval>() as socklen_t,
+            );
+        }
+
+        let mut count: isize = -1;
+        for _attempt in 0..2 {
+            count = unsafe { sys_socket::recv(sock, buf_ptr, 65536, 0) };
+            if count >= 0 {
+                break;
+            }
+            if unsafe { sys_socket::send(sock, packet_data_ptr, packet_data_len, 0) } < 0 {
+                break;
+            }
+        }
         if count < 0 {
             return Err(EIO);
         }
@@ -193,11 +217,34 @@ pub fn lookup_addr(addr: in_addr) -> Result<Vec<Vec<u8>>, c_int> {
             drop(Box::from_raw(packet_data_ptr));
         }
 
-        let i = mem::size_of::<sockaddr_in>() as socklen_t;
         let mut buf = [0u8; 65536];
         let buf_ptr = buf.as_mut_ptr().cast::<c_void>();
 
-        let count = unsafe { sys_socket::recv(sock, buf_ptr, 65536, 0) };
+        // Set 5s recv timeout (best-effort; if this fails, recv may block longer).
+        let tv = timeval {
+            tv_sec: 5,
+            tv_usec: 0,
+        };
+        unsafe {
+            sys_socket::setsockopt(
+                sock,
+                SOL_SOCKET,
+                SO_RCVTIMEO,
+                &tv as *const timeval as *const c_void,
+                core::mem::size_of::<timeval>() as socklen_t,
+            );
+        }
+
+        let mut count: isize = -1;
+        for _attempt in 0..2 {
+            count = unsafe { sys_socket::recv(sock, buf_ptr, 65536, 0) };
+            if count >= 0 {
+                break;
+            }
+            if unsafe { sys_socket::send(sock, packet_data_ptr, packet_data_len, 0) } < 0 {
+                break;
+            }
+        }
         if count < 0 {
             return Err(EIO);
         }