linux网络编程——TCP文件服务器
2012-08-19 12:22
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程序功能：
客户端能够通过命令显示文件服务器上的文件，能够上传、下载文件等等功能；
程序如下：
（1）、server.c
客户端能够通过命令显示文件服务器上的文件，能够上传、下载文件等等功能；
程序如下：
（1）、server.c
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <arpa/inet.h>
#include <sys/socket.h>
#include <dirent.h>
#include <fcntl.h>
struct message
{
char cmd[10];
char filename[20];
};
void list_file(int , struct message *);
void get_file(int , struct message *);
void put_file(int , struct message *);
int main(int argc, const char *argv[])
{
int listen_fd, socket_fd;
struct sockaddr_in server_addr, client_addr;
int client_addrlen;
struct message msg;
if (argc < 3)
{
fprintf(stderr, "usages : %s ip port\n", argv[0]);
exit(-1);
}
if ((listen_fd = socket(AF_INET, SOCK_STREAM, 0)) < 0)
{
perror("failed to create socket");
exit(-1);
}
server_addr.sin_family = AF_INET;
server_addr.sin_port = htons(atoi(argv[2]));
server_addr.sin_addr.s_addr = inet_addr(argv[1]);
client_addrlen = sizeof(struct sockaddr);
if (bind(listen_fd, (struct sockaddr *)&server_addr, sizeof(server_addr)) < 0)
{
perror("failed to bind");
exit(-1);
}
listen(listen_fd, 5);
while(1)
{
if ((socket_fd = accept(listen_fd, (struct sockaddr *)&client_addr, &client_addrlen)) < 0)
{
perror("failed to accept");
exit(-1);
}
memset(&msg, 0, sizeof(msg));
recv(socket_fd, &msg, sizeof(msg), 0);
printf("cmd : %s\n", msg.cmd);
if (strcmp(msg.cmd, "list") == 0)
list_file(socket_fd, &msg);
if (strcmp(msg.cmd, "get") == 0)
get_file(socket_fd, &msg);
if (strcmp(msg.cmd, "put") == 0)
put_file(socket_fd, &msg);
}
return 0;
}
void list_file(int socket_fd, struct message *msg)
{
DIR *dir;
struct dirent *dp;
char buf[100];
if ((dir = opendir(".")) < 0)
{
perror("failed to open dir");
exit(-1);
}
memset(buf, 0, sizeof(buf));
while ((dp = readdir(dir)) != NULL)
{
if (strcmp(dp->d_name, ".") == 0 || strcmp(dp->d_name, "..") == 0)
continue;
strcat(buf, dp->d_name);
strcat(buf, " ");
}
send(socket_fd, buf, strlen(buf) + 1, 0);
close(socket_fd);
return ;
}
void get_file(int socket_fd, struct message *msg)
{
int fd;
char buf[1024];
int num = 0;
if ((fd = open(msg->filename, O_RDONLY)) < 0)
{
perror("failed to open file");
exit(-1);
}
memset(buf, 0, sizeof(buf));
while((num = read(fd, buf, sizeof(buf))) > 0)
{
usleep(500);
send(socket_fd, buf, num, 0);
}
close(fd);
close(socket_fd);
return ;
}
void put_file(int socket_fd, struct message *msg)
{
int fd;
char buf[1024];
int num = 0;
if ((fd = open(msg->filename, O_WRONLY | O_CREAT | O_TRUNC, 0666)) < 0)
{
perror("failed to create file");
exit(-1);
}
memset(buf, 0, sizeof(buf));
while((num = recv(socket_fd, buf, sizeof(buf), 0)) > 0)
write(fd, buf, num);
close(fd);
close(socket_fd);
return ;
}（2）client.c#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <arpa/inet.h>
#include <sys/socket.h>
#include <dirent.h>
#include <fcntl.h>
struct message
{
char cmd[10];
char filename[20];
};
void list_file(struct message , char *, struct sockaddr_in);
void get_file(struct message , char *, char *, struct sockaddr_in);
void put_file(struct message , char *, char *, struct sockaddr_in);
int main(int argc, const char *argv[])
{
struct sockaddr_in server_addr;
struct message msg;
char buf[100];
char *arg[10];
int i = 0;
if (argc < 3)
{
fprintf(stderr, "usages: %s ip port\n", argv[0]);
exit(-1);
}
server_addr.sin_family = AF_INET;
server_addr.sin_port = htons(atoi(argv[2]));
server_addr.sin_addr.s_addr = inet_addr(argv[1]);
while (1)
{
memset(buf, 0, sizeof(buf));
memset(&msg, 0, sizeof(msg));
i = 0;
printf("##################################\n");
printf("function:\n");
printf("Input \"list\" can list the file server's files\n");
printf("Input \"get filename\" can download file from file server\n");
printf("Input \"put filename\" can upload file to file server\n");
printf("Input \"quit\" can quit the client\n");
printf("##################################\n");
printf(">");
fgets(buf, sizeof(buf), stdin);
buf[strlen(buf) - 1] = 0;
if (strncmp(buf, "quit", 4) == 0)
break;
arg[i] = strtok(buf, " ");
while(arg[i] != NULL)
arg[++i] = strtok(NULL, " ");
if (strcmp(arg[0], "list") == 0)
list_file(msg, arg[0], server_addr);
else if (strcmp(arg[0], "get") == 0)
get_file(msg, arg[0], arg[1], server_addr);
else if (strcmp(arg[0], "put") == 0)
put_file(msg, arg[0], arg[1], server_addr);
}
return 0;
}
void list_file(struct message msg, char *cmd, struct sockaddr_in server_addr)
{
char buf[100];
int server_fd;
if ((server_fd = socket(AF_INET, SOCK_STREAM, 0)) < 0)
{
perror("failed to create socket");
exit(-1);
}
if (connect(server_fd, (struct sockaddr *)&server_addr, sizeof(server_addr)) < 0)
{
perror("failed to connect");
exit(-1);
}
strcpy(msg.cmd, cmd);
send(server_fd, &msg, sizeof(msg), 0);
usleep(500);
memset(buf, 0, sizeof(buf));
recv(server_fd, buf, sizeof(buf), 0);
printf("%s\n", buf);
close(server_fd);
return ;
}
void get_file(struct message msg, char *cmd, char *filename, struct sockaddr_in server_addr)
{
int fd;
int server_fd;
char buf[1024];
int num = 0;
if ((server_fd = socket(AF_INET, SOCK_STREAM, 0)) < 0)
{
perror("failed to create socket");
exit(-1);
}
if (connect(server_fd, (struct sockaddr *)&server_addr, sizeof(server_addr)) < 0)
{
perror("failed to connect");
exit(-1);
}
if ((fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0666)) < 0)
{
perror("failed to create file");
exit(-1);
}
strcpy(msg.cmd, cmd);
strcpy(msg.filename, filename);
send(server_fd, &msg, sizeof(msg), 0);
memset(buf, 0, sizeof(buf));
while ((num = recv(server_fd, buf, sizeof(buf), 0)) > 0)
{
usleep(500);
write(fd, buf, num);
memset(buf, 0, sizeof(buf));
}
printf("DownLoad OK!\n");
close(fd);
close(server_fd);
return ;
}
void put_file(struct message msg, char *cmd, char *filename, struct sockaddr_in server_addr)
{
int fd;
int server_fd;
int num = 0;
char buf[1024];
if ((server_fd = socket(AF_INET, SOCK_STREAM, 0)) < 0)
{
perror("failed to create socket");
exit(-1);
}
if (connect(server_fd, (struct sockaddr *)&server_addr, sizeof(server_addr)) < 0)
{
perror("failed to connect");
exit(-1);
}
strcpy(msg.cmd, cmd);
strcpy(msg.filename, filename);
send(server_fd, &msg, sizeof(msg), 0);
usleep(500);
if ((fd = open(filename, O_RDONLY)) < 0)
{
perror("failed to open file");
exit(-1);
}
memset(buf, 0, sizeof(buf));
while ((num = read(fd, buf, sizeof(buf))) > 0)
send(server_fd, buf, num, 0);
printf("UpLoad OK!\n");
close(fd);
close(server_fd);
return ;
}
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