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C語言socket多線程編程限制客戶端連接數(shù)

時間:2025-11-20 02:20:03 C語言

C語言socket多線程編程限制客戶端連接數(shù)

  C語言傳遞參數(shù)均是以值傳遞(pass by value),另外也可以傳遞指針(a pointer passed by value)。以下是小編為大家搜索整理的C語言socket多線程編程限制客戶端連接數(shù),希望能給大家?guī)韼椭?更多精彩內容請及時關注我們應屆畢業(yè)生考試網!

C語言socket多線程編程限制客戶端連接數(shù)

  先上一些多線程需要使用的函數(shù)定義:

  代碼如下:

  DWORD WINAPI ProcessClientRequests(LPVOID lpParam) /pic/p>

  {

  return 0;

  }

  HANDLE handler=CreateThread(NULL, 0, ProcessClientRequests, &clientsocket, 0, NULL); /pic/p>

  WaitForMultipleObjects(MAXCLIENTS, threads, TRUE, INFINITE); /pic/p>

  for(int i=0;i

  {

  CloseHandle(threads[i]); /pic/p>

  }

  服務器端程序

  主線程代碼如下:

  代碼如下:

  #define MAXCLIENTS 3 /pic/p>

  int main()

  {

  WSADATA wsaData;

  WSAStartup(MAKEWORD(2, 2), &wsaData);

  HANDLE threads[MAXCLIENTS];

  SOCKET s=socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);

  sockaddr_in sockaddr;

  sockaddr.sin_family=PF_INET;

  sockaddr.sin_addr.S_un.S_addr=inet_addr("127.0.0.1");

  sockaddr.sin_port=htons(9000);

  bind(s, (SOCKADDR*)&sockaddr, sizeof(SOCKADDR));

  listen(s, 1);

  printf("listening on port [%d].n", 9000);

  int existingClientCount=0;

  while(TRUE)

  {

  SOCKADDR clientAddr;

  int size=sizeof(SOCKADDR);

  SOCKET clientsocket;

  clientsocket=accept(s, &clientAddr, &size);

  printf("***SYS*** New client touched.n");

  if(existingClientCount

  {

  threads[existingClientCount++]=CreateThread(NULL, 0, ProcessClientRequests, &clientsocket, 0, NULL); /pic/p>

  }

  else

  {

  char* msg="Exceeded Max incoming requests, will refused this connect!rn";

  send(clientsocket, msg, strlen(msg)+sizeof(char), NULL); /pic/p>

  printf("***SYS*** REFUSED.n");

  closesocket(clientsocket); /pic/p>

  break;

  }

  }

  printf("Maximize clients occurred for d%.rn", MAXCLIENTS);

  WaitForMultipleObjects(MAXCLIENTS, threads, TRUE, INFINITE); /pic/p>

  closesocket(s);

  for(int i=0;i

  {

  CloseHandle(threads[i]); /pic/p>

  }

  WSACleanup();

  printf("Cleared all.rn");

  getchar();

  exit(0);

  }

  子線程函數(shù)定義

  代碼如下:

  DWORD WINAPI ProcessClientRequests(LPVOID lpParam)

  {

  SOCKET* clientsocket=(SOCKET*)lpParam; /pic/p>

  char* msg="Hello, my client.rn";

  send(*clientsocket, msg, strlen(msg)+sizeof(char), NULL);

  printf("***SYS*** HELLO.n");

  while(TRUE)

  {

  char buffer[MAXBYTE]={0};

  recv(*clientsocket, buffer, MAXBYTE, NULL);

  if(strcmp(buffer, "exit")==0)

  {

  char* msg_bye="Bye.rn";

  send(*clientsocket, msg_bye, strlen(msg_bye)+sizeof(char), NULL);

  break;

  }

  printf("***Client*** %sn", buffer);

  }

  closesocket(*clientsocket);

  return 0;

  }

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