1、我們先搭建乙個乙個伺服器與客戶機並使他們進行通訊
2、在客戶機中對輸入的指令進行判斷，將指令轉化成對應的列舉型別傳送給服務機
3、服務機對傳送過來的ftp_cmd的值進行判斷，並執行相對應的功能
4、ls功能的實現：通過popen實現，獲取內容傳送客戶機並顯示
get 對指令進行分割，讀取分割後的檔名所對應的檔案，之後將讀取後的資料傳送給服務機
put 對指令進行分割，將檔案讀取到data中，傳送給客戶機，並在伺服器中建立檔案，將內容寫入
quit 直接退出
cd 採用chdir來實現
使用者名稱和密碼的實現：從檔案讀取密碼以及賬號與使用者輸入的進行對比，一致通過反之停止
伺服器**
#include #include #include #include #include #include /* see notes */
#include #include "msg.h"
#include "log.h"
#include "utils.h"
int g_running;
/** *
* @param in_cmd
* @param out_cmd
*/void handle_cmd(struct msg *in_cmd, struct msg *out_cmd)
break;
default:
break;
}}/**
* @brief 澶勭悊瀹㈡埛絝殑鍛戒護in_cmd錛屾妸緇撴灉鍐欏靉out_cmd
* * @param in_cmd
* @param out_cmd
*/void handle_cmd2(struct msg *in_cmd, struct msg *out_cmd)
} else if (ftp_cmd_hist == in_cmd->cmd) else if (ftp_cmd_cd == in_cmd->cmd)
int ret = chdir(dirname);
log_write("chdir ret %d", ret);
} else if (ftp_cmd_quit == in_cmd->cmd) else if (ftp_cmd_get == in_cmd->cmd)
long length = get_length(filename);
if (length < 0 || length > sizeof(out_cmd->data))
get_md5(filename, out_cmd->md5);
file *fp = fopen(filename, "r");
if (fp != null) else
} else if (ftp_cmd_put == in_cmd->cmd)
// 瀵規瘮瀹㈡埛絝殑md5
char md5[64];
get_md5(filename, md5);
if (memcmp(md5, in_cmd->md5, 32) != 0)
}}int main(int argc, char **ar**)
// bind絝彛錛孲erver_port
memset(&serveraddr, 0, sizeof(serveraddr));
serveraddr.sin_family = af_inet;
serveraddr.sin_port = server_port;
serveraddr.sin_addr.s_addr = htonl(inaddr_any);
int on = 1;
setsockopt(listenfd, sol_socket, so_reuseaddr, &on, sizeof(on));
ret = bind(listenfd, (struct sockaddr *)&serveraddr, sizeof(serveraddr));
if (ret < 0)
ret = listen(listenfd, 0);
if (ret < 0)
sock = accept(listenfd, null, 0);
if (ret < 0)
log_write("client connect.\n");
struct auth auth;
ret = recv(sock, &auth, sizeof(struct auth), 0);
log_write("%s %s\n", auth.username, auth.password);
struct auth server;
file *fp = fopen("passwd", "r");
if (fp != null)
if (0 != memcmp(auth.username, server.username, strlen(server.username)) ||
0 != memcmp(auth.password, server.password, strlen(server.password)))
ret = send(sock, &auth, sizeof(struct auth), 0);
log_write("send %d\n", ret);
if (ftp_cmd_error == auth.cmd)
g_running = 1;
while (g_running)
log_destroy();
return 0;
}
#include #include #include #include #include #include /* see notes */
#include "log.h"
#include "msg.h"
#include "utils.h"
enum ftp_cmd get_cmd(char *buf, struct msg *msg)
return ftp_cmd_error;
}int handle_user_input(struct msg *msg_send)
msg_send->cmd = cmd;
strcpy(msg_send->args, buf);
return 0;
}int handle_user_input2(struct msg *msg_send)
else if (0 == memcmp(buf, "hist", 4)) else if (0 == memcmp(buf, "cd", 2)) else if (0 == memcmp(buf, "get", 3)) else if (0 == memcmp(buf, "quit", 4)) else if (0 == memcmp(buf, "put", 3))
long length = get_length(filename);
if (length < 0 || length > sizeof(msg_send->data))
get_md5(filename, msg_send->md5);
// #define null 0
file *fp = fopen(filename, "r");
if (null != fp) else
} else
if (cmd == ftp_cmd_error)
msg_send->cmd = cmd;
strcpy(msg_send->args, buf);
return 0;
}int main(int argc, char **ar**)
log_write("connect server sucess\n");
struct auth auth;
printf("username:");
scanf("%s", auth.username);
printf("password:");
scanf("%s", auth.password);
auth.cmd = ftp_cmd_auth;
ret = send(sock, &auth, sizeof(struct auth), 0);
log_write("send ret %d", ret);
ret = recv(sock, &auth, sizeof(struct auth), 0);
if (ftp_cmd_error == auth.cmd)
printf("well done\n");
while(1)
ret = send(sock, msg_send, sizeof(struct msg), 0);
log_write("send ret %d\n", ret);
ret = recv(sock, msg_recv, sizeof(struct msg), 0);
log_write("recv ret %d\n", ret);
log_write("cmd %d\n", msg_recv->cmd);
log_write("data %s\n", msg_recv->data);
if (ftp_cmd_hist == msg_recv->cmd || ftp_cmd_ls == msg_recv->cmd) else if (ftp_cmd_get == msg_recv->cmd)
char md5[64];
get_md5(filename, md5);
if (memcmp(md5, msg_recv->md5, 32) != 0)
} else if (ftp_cmd_quit == msg_recv->cmd)
}log_destroy();
return 0;
}
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