in_addr structure (winsock2.h)
The in_addr structure represents an IPv4 Internet address.
Syntax
struct in_addr {
union {
struct {
u_char s_b1;
u_char s_b2;
u_char s_b3;
u_char s_b4;
} S_un_b;
struct {
u_short s_w1;
u_short s_w2;
} S_un_w;
u_long S_addr;
} S_un;
};
Members
S_un
S_un.S_un_b
An IPv4 address formatted as four u_chars.
S_un.S_un_b.s_b1
S_un.S_un_b.s_b2
S_un.S_un_b.s_b3
S_un.S_un_b.s_b4
S_un.S_un_w
An IPv4 address formatted as two u_shorts.
S_un.S_un_w.s_w1
S_un.S_un_w.s_w2
S_un.S_addr
An IPv4 address formatted as a u_long.
Remarks
The in_addr structure is used with IPv4 addresses.
The in_addr structure is the IPv4 equivalent of the IPv6-based in6_addr structure.
Note The IN_ADDR, PIN_ADDR, and LPIN_ADDR derived structures are only defined on the Windows SDK released with Windows Vista and later. The IN_ADDR, PIN_ADDR, and LPIN_ADDR derived structures are defined in the Inaddr.h header file. On earlier versions of the Windows SDK, variables of this type should be declared as struct in_addr.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Windows 2000 Professional [desktop apps only] |
| Minimum supported server | Windows 2000 Server [desktop apps only] |
| Header | winsock2.h |