学步园

// Server<br /> #include <stdio.h><br /> #include <winsock.h><br /> #pragma comment(lib, "wsock32.lib")<br /> int main(int argc, char* argv[])<br /> {<br /> WSADATA wsaData;<br /> SOCKET sockListener;<br /> SOCKADDR_IN sin, saUdpServ;<br /> BOOL fBroadcast = TRUE;<br /> char sendBuff[1024];<br /> int nSize;<br /> int nCount = 0;<br /> if (WSAStartup(MAKEWORD(1, 1), &wsaData) != 0) // initialize WinSocket<br /> {<br /> printf("Failed to initialize windows socket!/n");<br /> return -1;<br /> }<br /> sockListener = socket(PF_INET, SOCK_DGRAM, 0);<br /> setsockopt(sockListener, SOL_SOCKET, SO_BROADCAST, (CHAR*)&fBroadcast, sizeof(BOOL));<br /> sin.sin_family = AF_INET;<br /> sin.sin_port = htons(0);<br /> sin.sin_addr.s_addr = htonl(INADDR_ANY);<br /> if (bind(sockListener, (SOCKADDR*)&sin, sizeof(sin)) != 0)<br /> {<br /> printf("failed to bind socket to local port!/n");<br /> return -1;<br /> }<br /> saUdpServ.sin_family = AF_INET;<br /> saUdpServ.sin_addr.s_addr = htonl(INADDR_BROADCAST);<br /> saUdpServ.sin_port = htons(7001);<br /> nSize = sizeof(SOCKADDR_IN);<br /> while (true)<br /> {<br /> sprintf(sendBuff, "Message%d", nCount++);<br /> sendto(sockListener, sendBuff, lstrlen(sendBuff), 0, (SOCKADDR*)&saUdpServ, sizeof(SOCKADDR_IN));<br /> printf("%s/n", sendBuff);<br /> }<br /> return 0;<br /> }</p> <p>

// client<br /> #include <stdio.h><br /> #include <winsock.h><br /> #include <conio.h><br /> #pragma comment(lib, "wsock32.lib")<br /> int main(int argc, char* argv[])<br /> {<br /> WSADATA wsaData;<br /> SOCKET sockListener;<br /> SOCKADDR_IN sin, saClient;<br /> char cRecvBuff[1024];<br /> int nSize, nbSize;<br /> int iAddrLen = sizeof(saClient);<br /> if (WSAStartup(MAKEWORD(1, 1), &wsaData) != 0)<br /> {<br /> printf("Failed to initialize windows socket!/n");<br /> return -1;<br /> }<br /> sockListener = socket(AF_INET, SOCK_DGRAM, 0);<br /> sin.sin_family = AF_INET;<br /> sin.sin_port = htons(7001);<br /> sin.sin_addr.s_addr = htonl(INADDR_ANY);<br /> if (bind(sockListener, (SOCKADDR FAR*)&sin, sizeof(sin)) != 0)<br /> {<br /> printf("Failed to bind socket to local port!/n");<br /> return -1;<br /> }<br /> while (true)<br /> {<br /> nSize = sizeof(SOCKADDR_IN);<br /> if ((nbSize = recvfrom(sockListener, cRecvBuff, 1024, 0,<br /> (SOCKADDR FAR*)&saClient, &nSize)) == SOCKET_ERROR)<br /> {<br /> printf("Receive Error!");<br /> break;<br /> }<br /> cRecvBuff[nbSize] = '/0';<br /> printf("%s/n", cRecvBuff);<br /> }<br /> return 0;<br /> }<br />