函数名

vtcp_connectex

声明

int WINAPI vtcp_connectex(VTCP_SOCKET socket,PSOCKADDR_IN sai,int sailen,LPWSAOVERLAPPED lpOverlapped,LPWSAOVERLAPPED_COMPLETION_ROUTINE lpCompletionRoutine);

描述

连接服务端。

输入

VTCP_SOCKET socket: VTCP句柄，由vtcp_socket函数创建。

PSOCKADDR_IN sai: 连接目标地址结构。

int sailen: 连接目标地址结构大小，需要设置为 sizeof(SOCKADDR_IN)。

LPWSAOVERLAPPED lpOverlapped: 重叠I/O结构。

LPWSAOVERLAPPED_COMPLETION_ROUTINE lpCompletionRoutine: 完成例程。

输出

无

返回值（错误码=0 成功）

ERROR_INVALID_HANDLE： VTCP句柄不正确。

ERROR_INVALID_STATE: VTCP句柄状态不正确。

ERROR_INVALID_PARAMETER: 参数不正确。

ERROR_IO_PENDING：I/O被延迟。

其他错误参考windows

说明

当没有关联IOCP时,lpOverlapped->hEvent有效，则lpCompletionRoutine可以为NULL。

当没有关联IOCP时,lpCompletionRoutine = NULL，则lpOverlapped->hEvent必须有效。

当关联了IOCP时，lpOverlapped必须有效，而lpOverlapped->hEvent与lpCompletionRoutine被忽略。

参考

Windows完成端口编程模型（IOCP）。

connect

vtcp_iocp

typedef

void

(CALLBACK * LPWSAOVERLAPPED_COMPLETION_ROUTINE)(

IN DWORD dwError,

IN DWORD cbTransferred,

IN LPWSAOVERLAPPED lpOverlapped,

IN DWORD dwFlags

);

#define WSAOVERLAPPED OVERLAPPED

typedef struct _OVERLAPPED * LPWSAOVERLAPPED;

typedef struct _OVERLAPPED {

ULONG_PTR Internal;

ULONG_PTR InternalHigh;

union {

struct {

DWORD Offset;

DWORD OffsetHigh;

} DUMMYSTRUCTNAME;

PVOID Pointer;

} DUMMYUNIONNAME;

HANDLE hEvent;

} OVERLAPPED, *LPOVERLAPPED;