sockaddr_in转换IP头大啦

来了来了
_bind    proc                                          ;绑定   
        local    @stSin : sockaddr_in
        local    @InAddr : sockaddr_in
        local    @szBuffer:dword
        pushad
        invoke    socket,AF_INET,SOCK_STREAM,0
        mov    hSocket,eax
        mov    @stSin.sin_family,AF_INET
        invoke    htons,8888
        mov    @stSin.sin_port,ax
        mov    @stSin.sin_addr,INADDR_ANY
        invoke    bind,hSocket,addr @stSin,sizeof @stSin
        .if    eax == SOCKET_ERROR

        .else
            invoke listen,hSocket,50
            .While TRUE
                invoke accept,hSocket,offset addrs,0
                .break    .if    eax==INVALID_SOCKET
                invoke    CreateThread,NULL,0,offset _ServiceThread,eax,NULL,esp        ;收数据都成功 就是下面
                invoke    CloseHandle,eax        
               
                mov    eax,addrs.sin_addr                    
                invoke    inet_ntoa,eax
                invoke    MessageBox,NULL,eax,NULL,NULL    ; 这就出问题了 都是 0.0.0.0 有什么办法能取到 addrs中的正确IP?

            .endw
            invoke    closesocket,hSocket
        .endif
        popad

        ret   
_bind    endp

注意看 MSDN说明

accept Function

The accept function permits an incoming connection attempt on a socket.

Syntax
C++
SOCKET accept(
  __in     SOCKET s,
  __out    struct sockaddr *addr,
  __inout  int *addrlen
);

Parameters
s [in]
A descriptor that identifies a socket that has been placed in a listening state with the listen function. The connection is actually made with the socket that is returned by accept.

addr [out]
An optional pointer to a buffer that receives the address of the connecting entity, as known to the communications layer. The exact format of the addr parameter is determined by the address family that was established when the socket from the sockaddr structure was created.

-------------------------------------------------------------------------------------------------------
addrlen [in, out]   ; in , out !!!!!!!!
An optional pointer to an integer that contains the length of structure pointed to by the addr parameter.

-----------------------------------------------------------------------------------------------------------

_bind    proc                                          ;绑定   
        local    @stSin : sockaddr_in
        local    @stRetSin:sockaddr_in
        local    @dwRetSize:DWORD

        pushad
        invoke    socket,AF_INET,SOCK_STREAM,0
        mov    hSocket,eax
        mov    @stSin.sin_family,AF_INET
        invoke    htons,8888
        mov    @stSin.sin_port,ax
        mov    @stSin.sin_addr,INADDR_ANY
        invoke    bind,hSocket,addr @stSin,sizeof @stSin
        .if    eax == SOCKET_ERROR

        .else
            invoke listen,hSocket,50
            .While TRUE
                mov    @dwRetSize,sizeof sockaddr_in
                invoke accept,hSocket,addr @stRetSin,addr @dwRetSize
                .break    .if    eax==INVALID_SOCKET
                push      ecx
                invoke    CreateThread,NULL,0,offset _ServiceThread,eax,NULL,esp    
                pop       ecx            
                invoke    CloseHandle,eax        
               
                mov       eax,@stRetSin.sin_addr                 
                invoke    inet_ntoa,eax
                invoke    OutputDebugString,eax

            .endw
            invoke    closesocket,hSocket
        .endif
        popad

        ret   
_bind    endp


注:

accept   
如果不需要返回信息 直接
invoke accept,hSocket,NULL,NULL
如果需要返回信息 必须指定返回缓冲区 缓冲区是一个 sockaddr_in 结构 还必须指定 缓冲区大小
但是不可以
invoke accept,hSocket,addr @szBuff,sizeof @szBuff
因为 addrlen 必须是一个整型指针 int *addrlen
也就是说 必须赐予此指针  返回缓冲区的大小
然后函数在此指针返回 返回信息数据结构的大小
正确使用的情况如下:
Local  @szBuff:sockaddr_in
Local  @dwRetSize:DWORD

mov    @dwRetSize,sizeof @szBuff
invoke accept,hSocket,addr @szBuff,addr @dwRetSize


[ 本帖最后由 sll0807 于 2009-11-2 01:44 编辑 ]