Difference between revisions of "SOCU:gethostbyname"

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(→‎Description: Add hostent struct docs)
 
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=Description=
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=struct hostent=
It's currently unknown how the output buffer is converted into a hostent struct.
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Internally the sysmodule uses the standard hostent struct, but using s16 for h_addrtype and h_length:
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struct hostent {
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char*  h_name;
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char** h_aliases;
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s16    h_addrtype;
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s16    h_length;
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char** h_addr_list;
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};
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However, the struct returned is different from the internal one:
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struct hostent_3ds_t {
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s16          h_addrtype;    //< Host address type
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s16          h_length;      //< Length of address. Maximum of 16 for IPV6
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s16          h_addr_count;  //< Number of addresses returned. Maximum of 24
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s16          h_alias_count; //< Number of aliases returned. Maximum of 24
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char[256]    h_name;        //< Official name of host
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char[256][24] h_aliases;    //< Alias list
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char[16][24]  h_addr_list;  //< List of addresses from name server
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};
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 +
Its size is of 0x1A88 bytes.

Latest revision as of 01:05, 29 March 2024

Request[edit]

Index Word Description
0 Header code [0x000D0082]
1 Input hostname buffer size, including null-terminator.
2 Output buffer size, normally 0x1A88-bytes.
3 (insize<<14) | 0xC02
4 Pointer to input hostname buffer

The following is located 0x100-bytes after the beginning of the above command buffer:

Index Word Description
0 (outsize<<14) | 2
1 Pointer to output buf

Response[edit]

Index Word Description
0 Header code
1 Result code
2 POSIX return value

struct hostent[edit]

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.