View source for SOCU:gethostbyaddr

=Request=
{| class="wikitable" border="1"
|-
!  Index Word
!  Description
|-
| 0
| Header code [0x000E00C2]
|-
| 1
| Input address buffer size.
|-
| 2
| Type (should be AF_INET)
|-
| 3
| Output buffer size, normally 0x1A88-bytes.
|-
| 4
| (insize<<14)  <nowiki>|</nowiki> 0x1002
|-
| 5
| Pointer to input address buffer
|}

The following is located 0x100-bytes after the beginning of the above command buffer:
{| class="wikitable" border="1"
|-
!  Index Word
!  Description
|-
| 0
| (outsize<<14)  <nowiki>|</nowiki> 2
|-
| 1
| Pointer to output buf
|}

=Response=
{| class="wikitable" border="1"
|-
!  Index Word
!  Description
|-
| 0
| Header code
|-
| 1
| Result code
|-
| 2
| POSIX return value
|}

=struct hostent=
Internally the sysmodule uses the standard hostent struct, but using s16 for h_addrtype and h_length:

 struct hostent {
 	char*  h_name;
 	char** h_aliases;
 	s16    h_addrtype;
 	s16    h_length;
 	char** h_addr_list;
 };

However, the struct returned is different from the internal one:

 struct hostent_3ds_t {
 	s16           h_addrtype;    //< Host address type
 	s16           h_length;      //< Length of address. Maximum of 16 for IPV6
 	s16           h_addr_count;  //< Number of addresses returned. Maximum of 24
 	s16           h_alias_count; //< Number of aliases returned. Maximum of 24
 	char[256]     h_name;        //< Official name of host
 	char[256][24] h_aliases;     //< Alias list
 	char[16][24]  h_addr_list;   //< List of addresses from name server
 };

Its size is of 0x1A88 bytes.