socket代码,socket详解
socket 客户端可以向服务器端接收和发送文件，代码怎么写
之前写过这样的一个小程序，我发布在自己的博客上：
Server.c
#include?WinSock2.h
#include?WS2tcpip.h
#include?cstdio
#include?iostream
//?for?file?read
#include?fstream
#include?string
int?main()?{
/*?load?the?initializer?library?*/
WSADATA?wsaData;
WSAStartup(MAKEWORD(2,?2),?wsaData);
/*?list?the?each?fields?of?wsaData?*/
//?printf("wVersion:?%d\n",?wsaData.wVersion); //?514
//?printf("wHighVersion:?%d\n",?wsaData.wHighVersion); //?514
//?printf("iMaxSockets:?%d\n",?wsaData.iMaxSockets); //?0
//?printf("iMaxUdpDg:?%d\n",?wsaData.iMaxUdpDg); //?0
/*?you?may?not?print?the?lpVendorInfo?*/
//?printf("szDescription:?%s\n",?wsaData.szDescription); //?WinSock?2.0
//?printf("szSystemStatus:?%s\n",?wsaData.szSystemStatus); //?Running
/*?create?socket(address?family,?type,?protocol)?*/
int?socket_fd?=?socket(AF_INET,?SOCK_STREAM,?IPPROTO_TCP);
/*?initialize?the?addrinfo?hints?*/
struct?addrinfo?hints;
memset(hints,?0,?sizeof(hints));
hints.ai_family?=?AF_INET;
hints.ai_socktype?=?SOCK_STREAM;
hints.ai_protocol?=?IPPROTO_TCP;
hints.ai_flags?=?AI_PASSIVE;
struct?addrinfo?*result?=?nullptr;
/*?by?hints,?and?then?get?the?result(a?linked?list,?see?fields?below)?*/
getaddrinfo(NULL,?"8080",?hints,?result);
/*?the?member?fiekds?of?result?*/
//?printf("ai_family:?%d\n",?result-ai_family); //?2
//?printf("ai_socktype:?%d\n",?result-ai_socktype); //?1
//?printf("ai_protocol:?%d\n",?result-ai_protocol); //?6
//?printf("ai_flags:?%d\n",?result-ai_flags); //?0
//?printf("ai_canonname:?%s\n",?result-ai_canonname); //?(null)
//?printf("ai_a?ddrlen:?%d\n",?result-ai_addrlen); //?16
//?printf("ai_addr-sa_family:?%d\n",?result-ai_addr-sa_family); //?2
//?printf("ai_addr-sa_data:?%s\n",?result-ai_addr-sa_data); //?
//?printf("ai_next:?%x\n",?result-ai_next); //?0
/*?bind?the?socket?to?a?address?*/
/*?bind(socket,?sockaddr?name,?name?len)?*/
bind(socket_fd,?result-ai_addr,?result-ai_addrlen);
freeaddrinfo(result);
/*?listen?the?socket?*/
/*?listen(socket,?backlog)?*/
listen(socket_fd,?SOMAXCONN); /*?0x7fffffff?*/
while(true)?{
/*?accept?a?connection?*/
/*?accept(socket,?addr,?addrlen)?*/
int?client_fd?=?accept(socket_fd,?nullptr,?0);
printf("New?Connection?Eastablished...\n");
/*?Now?we?send?the?source?code?of?this?file?to?client?*/
std::ifstream?fin("c:\\source.cpp");
/*?store?it?into?a?buffer.?*/
while?(fin.good())?{
//?I?rememeber?there?is?a?method?called?getline
std::string?s;
getline(fin,?s);
//?we?need?a?new?line
s?=?s?+?'\n';
send(client_fd,?s.c_str(),?s.size(),?0);
}
fin.close();
/*?close?client?socket?*/
closesocket(client_fd);
}
/*?may?be?never?invoked?*/
closesocket(socket_fd);
WSACleanup();
return?0;
}
Client.c
#include?WinSock2.h
#include?cstdio
#include?iostream
#include?fstream
int?main()?{
/*?load?the?initializer?library?*/
WSADATA?wsaData;
WSAStartup(MAKEWORD(2,?2),?wsaData);
/*?create?socket?*/
int?socket_fd?=?socket(AF_INET,?SOCK_STREAM,?IPPROTO_TCP);
/*?connect?*/
sockaddr_in?addr;
addr.sin_family?=?AF_INET;
addr.sin_addr.s_addr?=?inet_addr("127.0.0.1");
addr.sin_port?=?htons(8080);
/*?connect(socket,?sockaddr,?namelen)?*/
connect(socket_fd,?(sockaddr*)addr,?sizeof(addr));
/*?buffer?memory?*/
char?buf[1024];
/*?open?a?file?for?write?*/
std::ofstream?fout("source.cpp",?std::ios_base::trunc);
while?(true)?{
int?read?=?recv(socket_fd,?buf,?1024,?0);?
if?(read?==?0)?{
fout.close();
printf("Connection?Closed...\n");
break;
}
if?(read??1024)?{
printf("Buffer?Overflow...\n");
}?else?{
buf[read?-?1]?=?0;
/*?now?we?can?print?the?bytes?from?server?*/
fout??buf??std::endl;
}
}
/*?close?socket?*/
closesocket(socket_fd);
WSACleanup();
return?0;
}
linux socket程序 求代码运行结果
ret?=?write(socket_fd,?send_buff,?strlen(send_buff));
应该改为：
ret?=?write(new_socket_fd,?send_buff,?strlen(send_buff));
accept成功后，所有的操作，都要针对新获得的句柄来操作，不然会引发错误，造成主程序异常退出。
socket?这段代码是什么意思？
myscoket=new socket(addressfamily.internetwork,sockettype.stream,protocoltype.tcp) //实例化一个Socket对象。
mysocket.beging.connect(myserver,new asycallback(connectback),mysocket;connectreset.waitone();)
//象系统投递一个异步连接远程服务器的操作。连接成功后，系统会自动调用回调函数connectback.在connectback函数内实现连接成功后的操作就好了。
socket c 这代码是什么意思？
这段代码是使用 windows socket 函数库编写的一个客户端，但是只是去连接了服务器 192.168.1.1:3578
如果连接成功，connect 函数的返回值为 0, 则后续可以调用 recv 和 send 实现数据的接收和发送。