78 lines
1.8 KiB
Plaintext
78 lines
1.8 KiB
Plaintext
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#include <stdio.h>
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#include <string.h>
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#include <winsock2.h>
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#define PORT 8888
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#define BUFFER_SIZE 4196
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const char* kExitFlag = "exit";
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int main() {
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WORD winsock_version = MAKEWORD(2,2);
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WSADATA wsa_data;
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if (WSAStartup(winsock_version, &wsa_data) != 0) {
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printf("Failed to init socket dll!\n");
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return 1;
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}
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SOCKET server_socket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
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if (server_socket == INVALID_SOCKET) {
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printf("Failed to create server socket!\n");
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return 2;
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}
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sockaddr_in server_addr;
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server_addr.sin_family = AF_INET;
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server_addr.sin_port = htons(PORT);
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server_addr.sin_addr.S_un.S_addr = INADDR_ANY;
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if (bind(server_socket, (LPSOCKADDR)&server_addr, sizeof(server_addr)) == SOCKET_ERROR) {
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printf("Failed to bind port!\n");
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return 3;
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}
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if (listen(server_socket, 10)) {
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printf("Failed to listen!\n");
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return 4;
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}
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sockaddr_in client_addr;
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int client_addr_len = sizeof(client_addr);
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printf("Wait for connecting...\n");
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SOCKET client_socket = accept(server_socket, (SOCKADDR*)&client_addr, &client_addr_len);
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if (client_socket == INVALID_SOCKET) {
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printf("Failed to accept!\n");
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return 5;
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}
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printf("Succeed to receive a connection: %s\n" , inet_ntoa(client_addr.sin_addr));
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char recv_buf[BUFFER_SIZE+1];
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while (true) {
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int ret = recv(client_socket, recv_buf, BUFFER_SIZE, 0);
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if (ret < 0) {
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printf("Failed to receive data!\n");
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break;
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}
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recv_buf[ret]=0; // correctly ends received string
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printf("Receive from Client: \"%s\" \n", recv_buf);
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if (strcmp(kExitFlag,recv_buf)==0) {
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send(client_socket, kExitFlag, sizeof(kExitFlag), 0);
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printf("Exit!\n");
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break;
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}
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const char* send_data = "Hello, Tcp Client!\n";
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send(client_socket, send_data, strlen(send_data), 0);
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}
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closesocket(client_socket);
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closesocket(server_socket);
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WSACleanup();
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return 0;
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}
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