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皮皮勒 发表于 2006-8-29 01:04

在CB中用socket api来写网络通讯程序

int nSize=0;
g(i%W4L/`$Oy    nSize=recv(m_AcceptSocket,(char FAR*)buf,4096,0);*fbx1sym+c~4g
   if(nSize>0)
1\Rg K8u!|%q    {v!IW}Hsa?
      buf[nSize]='\0';
r.S,F] l"],?l/m       //Display
D)F h-\ I5efYa       PSTNForm->Memo1->Lines->Add("Received Length:"+String(nSize));%@,_"b2SIZI!q;?"_%L;@
      PSTNForm->Memo1->Lines->Add("Received:"+StrPas(buf));A4ND*X3~T+k
      //Deliver
d'W0|$t}"`       ::Sleep(100);&~4M$xv8eV?1M&U
      send(m_AcceptSocket,buf,nSize,0);
| w#CB"f$V5e~    }
4q5n!L4e,^ V]
Q.Y)v!D3A| }
r2P(O'lZ_ POW
v //******************************CLASS TListenThread*****************************************************9F(^$k3PCrc3bk)B
__fastcall TListenThread::TListenThread(PROTO m_ProtocolA,UINT m_PortA,bool CreateSuspended):TThread(FALSE)
YP6@^:V$bP7_ {
tI)zg}9~+\    m_Socket=INVALID_SOCKET;
sq9[brh l*Pr-b    m_Port=m_PortA;?-Z7|6G-N7X
   m_Protocol=m_ProtocolA;puT0P4i)wK
   szTmp[0]='\0';
3At2|E't9V.E    ::ZeroMemory(&wsaData,sizeof(WSAData));S&O#c:n&K~x
   ::ZeroMemory(&server,sizeof(struct sockaddr_in));{"l"A1@"l
   FreeOnTerminate=TRUE;//Automatically delete while terminating. p*hu,NLj;^ c'W
}%X7UecF8RB*}
__fastcall TListenThread::~TListenThread()
X,H`:? d \H {a$f bX0@*?
   closesocket(m_Socket); i,bPxF-a8R0e
   ::WSACleanup();
/I*Ky&Ir]*p    m_Socket=INVALID_SOCKET;
-Q/wyAZ ~%IM    m_Port=0;A]O{RK7L4|l
   m_Protocol=TCP;~IS;c%| pve
   szTmp[0]='\0';1T*I9Owph
   ::ZeroMemory(&wsaData,sizeof(WSAData));ba0ei R?u0r
   ::ZeroMemory(&server,sizeof(struct sockaddr_in));/f0oa6S(jy'I ^EY;]
}
!j.rq^ S}j-G void __fastcall TListenThread::DoError()$W5\9j$w;b_W
{
tL!d!L"@Dg7Vg7yg    if(m_Socket!=INVALID_SOCKET) closesocket(m_Socket);
Bz.HL*v:XRsqy    WSACleanup();4mP*Fr(jWv^
   return;
0v} a#C$ZY,lj }
NBO%D:|8Um-E void __fastcall TListenThread::InitSocket()
W4y,HJUa$D_ {
,D)~*usNr3v    WORD version=MAKEWORD(2,0);jX8E#Z_} b
   if(::WSAStartup(version,&wsaData)){d X(KiHsR0Z
      sprintf(szTmp,"Failed to intiailize socket,error no:%d",::WSAGetLastError());"YWG Hd(N
      ::MessageBox(0,szTmp,"Error",MB_OK+MB_ICONERROR);
u~0eY1[8U*d       DoError();rfAM i3t
      return;
9vG_
R,E tU+Y9X    }
6v9pwfo*f
x }+T0B7Ep X QV"~b2B
void __fastcall TListenThread::CreateListenSocket()-q0MIB9\w V}
{/AgXn3o$],L
   switch(m_Protocol)]0T.u+G7zbB
   {J0OY
S5}1`G
      case UDP:E'c*zZpB#H;Y6^}m
         m_Socket=socket(AF_INET,SOCK_DGRAM,0);
]:_$~6x{9x          break;
I
f/W C x`H       case TCP:O5}P(P _?8u!\o
         m_Socket=socket(AF_INET,SOCK_STREAM,0);:Pti;G3[D,B ~B
         break;
fux,~r       default:&@-io+^'AE6k'~9F
         sprintf(szTmp,"Error protocol!");"s'U4~'vh&z$PZw8^
         ::MessageBox(0,szTmp,"Error",MB_OK+MB_ICONERROR);
{{{ ^$?4gfC4Vy          DoError();1Qv$@k6V
         break;cl0L\
Q|
   }vv^w2G0Y
   if(m_Socket==INVALID_SOCKET){
XpL0|3q:I6T1u"p_       sprintf(szTmp,"Failed to create socket!");
5DRZ b-R1W l m.s-M       ::MessageBox(0,szTmp,"Error",MB_OK+MB_ICONERROR);
b1gpl.gt       DoError();a,HD/P(n0m]
      return;mD sBr0hQkuB
   }:k7F?$L"JJ
}
h!Zhy|$i4RS void __fastcall TListenThread::SetListenSocket()jbD.O8U\mO
{&^jvn/X(nj(U
   server.sin_family=AF_INET;EW/SLj|9MT1F
   server.sin_port=htons(m_Port);]x5L5Fp)Z
~1q
   server.sin_addr.S_un.S_addr=INADDR_ANY;
sa T9ho,@*yH8[W    int NewOpenType=SO_SYNCHRONOUS_NONALERT;}fJdO#pV
   if(setsockopt(INVALID_SOCKET,SOL_SOCKET,SO_OPENTYPE,(char*)&NewOpenType,4)){
`)Y-V
CNkH       sprintf(szTmp,"Set socket option error,error no:%d",::WSAGetLastError());
;E#rG\4sP4\       ::MessageBox(0,szTmp,"Error",MB_OK+MB_ICONERROR);
;s+Lq"O"Zp       DoError();r3HX%l?)nt+u4h
      return;dN]S|.U#cb5{
   } E(T} X:O#f%X
}
2R{2W;] jx-oPt U|u void __fastcall TListenThread::BindListenSocket()
D,} tO
{*X1A@ {
J9z"{9tb`5cq     if(bind(m_Socket,(sockaddr*)&server,sizeof(struct sockaddr_in))){@T3M0I$As.jC
      sprintf(szTmp,"Failed to bind socket,error no:%d",::WSAGetLastError());z }fC
ra8\%Qe
      ::MessageBox(0,szTmp,"Error",MB_OK+MB_ICONERROR);"A&sZ jB$eV @
      DoError();
@l)U6s-SP"l4FL       return;
6i4h~j(g6C[7|&Q    }4T
H,z'{| s~+S

$@T:QZ,h bw }
k+cU$l KK@ void __fastcall TListenThread::ListenSocket()x5{|"C#]l
{%U+}YQ|"n,R8g#j&m
  if(listen(m_Socket,SOMAXCONN)){
(C7L7y-l3we5q&q      sprintf(szTmp,"listen error,error no:%d",::WSAGetLastError());

t|c
U~      ::MessageBox(0,szTmp,"Error",MB_OK+MB_ICONERROR);
/QR1TS'BO x y"E#F      DoError();
,D$?+S9T'h9` ~      return;
M torv"I\J o]   }z OA%y!Ix,Pov
  //Determine whether there is any connection V!h;VJE0i;c+S
  FD_ZERO(&FDS);
`6ssq4{e4S|   FD_SET(m_Socket,&FDS);(c/{Q f2lY+XH
}
+A~U8i%` void __fastcall TListenThread::Execute()
T D-G,G&uJ {
+fy7} ovI[_7Tu7o    char buf[4096];
]VwC#ah(T/GQs!M    struct sockaddr_in from; //for UDP
'B)^vzBM    int nLen=sizeof(from),nSize=0;  //for UDP
^:cE SfeU;F    InitSocket(); x5R"FX
Mn:_
   CreateListenSocket();
2m*h_:v9R+B:XnW;D,L    SetListenSocket(); vr]:}G4|!UU
   BindListenSocket();&}6]/q k @)fp
   if(m_Protocol==UDP){
cRBb _!g*UQk\!^       while(!Terminated){
;^-R?V3g          int nSize=recvfrom(m_Socket,buf,4096,0,(struct sockaddr*)&from,&nLen);
)L{um/Ia@          if(nSize>0){*ALSjFUw
            buf[nSize]='\0';5L&i O asP!`4AO
            PSTNForm->Memo1->Lines->Add("Received Length:"+String(nSize));+e+`gn+D
            PSTNForm->Memo1->Lines->Add("Received:"+StrPas(buf));
lCr~+R4aID/_             ::Sleep(100);,FUOgN
            sendto(m_Socket,buf,nSize,0,(struct sockaddr*)&from,sizeof(struct sockaddr_in));
8d!B~8vz Y          }
+y$e[{#Q({dp3vH          else return;5eRGan1LBM
K/]&R+p0b.YM
      }
LY-`^ O@*V    }^R]"b-|$|tO0@A
   ListenSocket();5i&X4Xm,Qz`{
   struct sockaddr_in client;"X5i
Q?%C.hudk;J
   int nLength=sizeof(struct sockaddr_in);
bvp8^Q"V/`cX    while(!Terminated){4Hu0i}dLf#QvQ
      int nError=select(1,&FDS,0,0,0);
nLbsaC*@ SQ       if(nErrorTerminate();D7NItC'xd
      pCThread->WaitFor();
RNHM#_L X#j    }
CY2o|d]{O }5V,Q VhO\PE7F
//************************PSTNForm*********************************************//
T5mmoG
f`8Y^ __fastcall TPSTNForm::TPSTNForm(TComponent* Owner)
%sAi6dE"Q    : TForm(Owner)y0tj,B(v$l
aERN
{
Ke4F WS
cw }
K.QVu2e void __fastcall TPSTNForm::Button1Click(TObject *Sender)!f:[Rw^R
{
2QtO[ l(Uq h    Close();,h7bIs
V:~L(Z
}
s.y s0UU2F R void __fastcall TPSTNForm::Button2Click(TObject *Sender)
O6? r0C/W4E7ka1{W {
zZ7? A2s`w    if(pThread){
p(K?3G)a       pThread->Suspend();m I;H'u7A'Yp
      pThread->Terminate();
-q QQ#kT
?Ma-br       delete pThread;
,Vc C|Y|cP       pThread=0;PW"OkdV^/B
   }
'A
c*kg4n,vA    UINT m_Port;
m {E Ig)A    try
H p SyYh'L    {
xJ5vG^3Z-EP/h{)a       m_Port=Port->Text.ToInt();
0Sg!i$L#V2wB0v,{.Xi&VK    }5@pi}+a(O
   catch(Exception &e)}J&x$F c:[)x g
   {4fVtxu2U2rGT
      ::MessageBox(0,e.Message.c_str(),"Error",MB_OK+MB_ICONERROR);'i} R#f/P d|
      return;
N;j_ ?kk6y    }
(@"T
NS;Veb    PROTO m_Protocol;
JaR.X2@;g    switch(Prot->ItemIndex)
7SrCFb8@    {
y1H rX[       case 0:?T@`Ju1c
         m_Protocol=TCP;`~uK#W^['o
         break;
S~ QKBwn|F.n       case 1:nDR9^
^A7Y!] \\
         m_Protocol=UDP;:Lp5p2V,n
         break;9[G4ej*IN-J
      default:
pf!tjj%O'[%Z/i0L8U          break;
#X_fq,i~Z    }
xXq$j8\j    pThread=new TListenThread(m_Protocol,m_Port,FALSE);
qFD9t-C:kx    //pThread->Terminate();
C'V,FyR Bm%` }A3@(G5~p/}
void __fastcall TPSTNForm::FormCreate(TObject *Sender)9vZJ,V${
{
}s
M)v`,C?    ::SendMessage(Prot->Handle,CB_SETCURSEL,0,1); ]Idc:tx{4|#^;~q
}
S@H,` q_ 5y:{;eu"j%v(Q?(a[E[
r
void __fastcall TPSTNForm::FormDestroy(TObject *Sender)
\/p-S|u {
i/pf3s:B    if(pThread){
$Lv7[0G%jD~ J       pThread->Suspend();R\,J)[Gr
      pThread->Terminate();}
%V T}5[!a~5Op/q }
mOo5]/L5h 上面的代码，各位可根据自已的需要和针对自已的应用，在数据处理方面加以改进就可以了。

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