网站建设与开发的论文,崇信门户网站留言回复,哪里有手机网站制作公司,做网站 需要买云服务器吗1--基于TCP实现字符串对话 主要需求#xff1a; 服务器端和客户端各传递 1 次字符串#xff0c;基于 TCP 协议#xff0c;传递字符串前先以 4 字节整数型方式传递字符串长度#xff0c;剩余部分为字符串数据#xff1b; 注#xff1a;下面的代码基于 Windows 系统实现 服务器端和客户端各传递 1 次字符串基于 TCP 协议传递字符串前先以 4 字节整数型方式传递字符串长度剩余部分为字符串数据 注下面的代码基于 Windows 系统实现 1-1--服务器端
// gcc string_server_win.c -o string_server_win -lwsock32
// string_server_win 9190#include stdio.h
#include stdlib.h
#include string.h
#include winsock2.h#define BUF_SIZE 1024
#define Len_SIZE 4void ErrorHandling(char *message){fputs(message, stderr);fputc(\n, stderr);exit(1);
}int main(int argc, char *argv[]){if (argc ! 2) {printf(Usage: %s port\n, argv[0]);exit(1);}WSADATA wsaData; // init Socket libif(WSAStartup(MAKEWORD(2, 2), wsaData) ! 0){ ErrorHandling(WSAStartup() error!);}int Serv_sock socket(PF_INET, SOCK_STREAM, 0); // create socketif (Serv_sock -1) {ErrorHandling(socket() error);}struct sockaddr_in serv_addr; // allocate ip, portmemset(serv_addr, 0, sizeof(serv_addr)); serv_addr.sin_family AF_INET;serv_addr.sin_addr.s_addr htonl(INADDR_ANY);serv_addr.sin_port htons(atoi(argv[1]));if (bind(Serv_sock, (struct sockaddr*) serv_addr, sizeof(serv_addr)) -1){ ErrorHandling(bind() error);}if (listen(Serv_sock, 5) -1) { // readyErrorHandling(listen() error);}struct sockaddr_in clnt_addr;int clnt_addr_size sizeof(clnt_addr);for (int i 0; i 5; i) {int Clnt_sock accept(Serv_sock, (struct sockaddr*) clnt_addr, clnt_addr_size); // acceptif (Clnt_sock -1){ErrorHandling(accept() error);}else{printf(Connected client %d \n, i1);}while(1) {int over 0, recv_len 0, msg_len, recv_cnt;char msg[BUF_SIZE];while (recv_len 0 || recv_len msg_len Len_SIZE) {recv_cnt recv(Clnt_sock, (char*)msg[recv_len], BUF_SIZE, 0);if (recv_cnt -1) {ErrorHandling(read() error!);}if (recv_cnt 0) {over 1;break;}recv_len recv_cnt;if (recv_len Len_SIZE) {memcpy(msg_len, msg, Len_SIZE);}}msg[recv_len] \0;if (over 1) {break;}printf(Message from client: %s, msg Len_SIZE); // output message from clientfputs(Input message: , stdout);fgets(msg Len_SIZE, BUF_SIZE - Len_SIZE, stdin); // input messageint len strlen(msg Len_SIZE);memcpy(msg, len, Len_SIZE);send(Clnt_sock, msg, Len_SIZE len, 0); // send message to client}closesocket(Clnt_sock);}closesocket(Serv_sock);return 0;
}1-2--客户端
// gcc string_client_win.c -o string_client_win -lwsock32
// string_client_win 127.0.0.1 9190#include stdio.h
#include stdlib.h
#include string.h
#include winsock2.h#define BUF_SIZE 1024
#define Len_SIZE 4void ErrorHandling(char *message){fputs(message, stderr);fputc(\n, stderr);exit(1);
}int main(int argc, char* argv[]){if (argc ! 3) {printf(Usage: %s IP port\n, argv[0]);exit(1);}WSADATA wsaData; // init socket libif(WSAStartup(MAKEWORD(2, 2), wsaData) ! 0){ErrorHandling(WSAStartup() error!);}int sock socket(PF_INET, SOCK_STREAM, 0); // create socketif (sock -1)ErrorHandling(socket() error);struct sockaddr_in serv_addr; // allocate ip, portmemset(serv_addr, 0, sizeof(serv_addr)); serv_addr.sin_family AF_INET;serv_addr.sin_addr.s_addr inet_addr(argv[1]);serv_addr.sin_port htons(atoi(argv[2]));if (connect(sock, (struct sockaddr*) serv_addr, sizeof(serv_addr)) -1){ // connectErrorHandling(connect() error);}else {puts(Connected);}for(int i 0; i 3; i) {char msg[BUF_SIZE];memset(msg, 0, BUF_SIZE);fputs(Input message: , stdout);fgets(msg Len_SIZE, BUF_SIZE - Len_SIZE, stdin); // input messageint len strlen(msg Len_SIZE);memcpy(msg, len, Len_SIZE);send(sock, msg, Len_SIZE len, 0); // send message to serverint recv_len 0, msg_len 0, recv_cnt 0;while (recv_len 0 || recv_len msg_len Len_SIZE) {recv_cnt recv(sock, (char*)msg, BUF_SIZE, 0);recv_len recv_cnt;if (recv_len Len_SIZE) {memcpy(msg_len, msg, Len_SIZE);}}msg[recv_len] \0;printf(Message from server: %s, msg Len_SIZE);}closesocket(sock);return 0;
}1-3--编译运行
# 服务器端
gcc string_server_win.c -o string_server_win -lwsock32
string_server_win 9190# 客户端
gcc string_client_win.c -o string_client_win -lwsock32
string_client_win 127.0.0.1 9190
1-4--基于 linux 实现
项目链接Chapter5
2--基于TCP实现文件传输
