Revise network definitions for HorizonOS

(backport <#3863>)
(cherry picked from commit 82ebf14)

src/unix/newlib/horizon/mod.rs

@@ -21,6 +21,14 @@ pub type sbintime_t = ::c_longlong;
 pub type sigset_t = ::c_ulong;
 
 s! {
+ pub struct hostent {
+ pub h_name: *mut ::c_char,
+ pub h_aliases: *mut *mut ::c_char,
+ pub h_addrtype: u16,
+ pub h_length: u16,
+ pub h_addr_list: *mut *mut ::c_char,
+ }
+
  pub struct sockaddr {
  pub sa_family: ::sa_family_t,
  pub sa_data: [::c_char; 26usize],
@@ -35,6 +43,7 @@ s! {
  pub sin_family: ::sa_family_t,
  pub sin_port: ::in_port_t,
  pub sin_addr: ::in_addr,
+ pub sin_zero: [::c_char; 8],
  }
 
  pub struct sockaddr_in6 {

src/unix/newlib/mod.rs

@@ -53,6 +53,21 @@ cfg_if! {
  }
 }
 
+cfg_if! {
+ if #[cfg(not(target_os = "horizon"))] {
+ s!{
+ pub struct hostent {
+ pub h_name: *mut ::c_char,
+ pub h_aliases: *mut *mut ::c_char,
+ pub h_addrtype: ::c_int,
+ pub h_length: ::c_int,
+ pub h_addr_list: *mut *mut ::c_char,
+ pub h_addr: *mut ::c_char,
+ }
+ }
+ }
+}
+
 s! {
  // The order of the `ai_addr` field in this struct is crucial
  // for converting between the Rust and C types.
@@ -87,16 +102,7 @@ s! {
  }
 
  pub struct in_addr {
- pub s_addr: ::in_addr_t,
- }
-
- pub struct hostent {
- pub h_name: *mut ::c_char,
- pub h_aliases: *mut *mut ::c_char,
- pub h_addrtype: ::c_int,
- pub h_length: ::c_int,
- pub h_addr_list: *mut *mut ::c_char,
- pub h_addr: *mut ::c_char,
+ pub s_addr: ::in_addr_t,
  }
 
  pub struct pollfd {