FTP雛型程式碼一枚
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <stdio.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <string.h>
#include <netdb.h>
#define DEST_IP "140.113.140.165"//"140.113.17.206"
//#define LOCAL_IP "140.113.209.67"
#define DEST_PORT 1001
#define MY_HOST "ccbsd7.csie.nctu.edu.tw"
//#define MY_HOST "acer2.twbbs.org"
//#define MY_PORT 3000
#define STDIN 0
FILE *file;
char s[1000];
void getport(int MY_PORT)
{
int y;
strcpy(s,"PORT 140,113,209,67,");
y=strlen(s);
s[y]=(MY_PORT/256)/10+48;
s[y+1]=(MY_PORT/256)%10+48;
s[y+2]=',';
if((MY_PORT%256)>=100)
{
s[y+3]=(MY_PORT%256)/100+48;
s[y+4]=((MY_PORT%256)/10)%10+48;
s[y+5]=(MY_PORT%256)%10+48;
s[y+6]=0;
}
else if((MY_PORT%256)>=10)
{
s[y+3]=(MY_PORT%256)/10+48;
s[y+4]=(MY_PORT%256)%10+48;
s[y+5]=0;
}
else
{
s[y+3]=(MY_PORT%256)+48;
s[y+4]=0;
}
//printf("[%s]\n",s);
}
int main()
{
int sockfd,new_fd,len,x,y=0,i,myport,count,new_fd2,MY_PORT=3000;
char ch ='A',s1[1000],*s2=NULL,myIP[1000];
struct sockaddr_in my_addr, dest_addr;
struct hostent *h;
int result,sin_size;
fd_set readfds;
void *buf=NULL;
if ((h=gethostbyname(MY_HOST)) == NULL) { // get the host info
herror("gethostbyname");
exit(1);
}
strcpy(myIP,inet_ntoa(*((struct in_addr*)h->h_addr)));
printf("IP Address : %s\n", myIP);
/* if ((h=gethostbyname(MY_HOST)) == NULL) { // get the host info
herror("gethostbyname");
exit(1);
}
strcpy(myIP,inet_ntoa(*((struct in_addr*)h->h_addr)));
printf("IP Address : %s\n", myIP);*/
sockfd = socket(AF_INET, SOCK_STREAM, 0);
my_addr.sin_family = AF_INET;
my_addr.sin_addr.s_addr = inet_addr(myIP);
memset(&(my_addr.sin_zero), '\0', 8);
dest_addr.sin_family = AF_INET; // host byte order
dest_addr.sin_port = htons(DEST_PORT); // short, network byte order
dest_addr.sin_addr.s_addr = inet_addr(DEST_IP);
memset(&(dest_addr.sin_zero), '\0', 8); // zero the rest of the struct
len = sizeof(dest_addr);
result = connect(sockfd, (struct sockaddr *)&dest_addr, len);
if(result == -1)
{
printf("can't connect to the server.\n");
exit(1);
}
else
{
FD_ZERO(&readfds);
while(1)
{
FD_SET(sockfd, &readfds);
FD_SET(STDIN, &readfds);
select(STDIN+sockfd+1, &readfds, NULL, NULL, NULL);
if ( FD_ISSET(sockfd, &readfds) )
{
x=read(sockfd, s,1000);
if(x==-1)
strcpy(s,"error!");
else if(x==0)
break;
s[x]=0;
printf("%s>\n",s);
}
else if (FD_ISSET(STDIN, &readfds))
{
fgets(s,1000,stdin);
if( (strcmp(s,"exit\n"))==0)
break;
else if( (strcmp(s,"list\n"))==0)
{
my_addr.sin_port = htons(MY_PORT);
new_fd = socket(AF_INET,SOCK_STREAM,0);
strcpy(s1,s);
getport(MY_PORT);
y=strlen(s);
s[y]= 13;
s[y+1]= 10;
x=write(sockfd,s,y+2);
MY_PORT++;
x=read(sockfd, s,1000);
s[x]=0;
printf("%s>\n",s);
x=bind(new_fd, (struct sockaddr *)&my_a
ddr, sizeof(struct sockaddr));
listen(new_fd, 1);
strcpy(s,s1);
y=strlen(s);
s[y] = 13;
s[y+1]= 10;
x=write(sockfd,s,y+2);
x=read(sockfd, s,1000);
s[x]=0;
printf("%s>\n",s);
sin_size = sizeof(struct sockaddr_in);
new_fd2 = accept(new_fd, (struct sockad
dr *)&dest_addr,(socklen_t*)&sin_size);
while(1)
{
x=read(new_fd2, s,1000);
if(x<=0)
break;
printf("%s",s);
}
close(new_fd);
}
else if(s[0]=='r'&&s[1]=='e'&&s[2]=='t'&&s[3]==
'r')
{
my_addr.sin_port = htons(MY_PORT);
strcpy(s1,s);
s2=strtok(s1," ");
s2=strtok(NULL,"\n");
file=fopen(s2,"w+");
strcpy(s2,s);
new_fd = socket(AF_INET,SOCK_STREAM, 0)
;
getport(MY_PORT);
y=strlen(s);
s[y]= 13;
s[y+1]= 10;
x=write(sockfd,s,y+2);
MY_PORT++;
x=read(sockfd, s,1000);
s[x]=0;
printf("%s>\n",s);
x=bind(new_fd, (struct sockaddr *)&my_a
ddr, sizeof(struct sockaddr));
listen(new_fd, 1);
strcpy(s,s2);
y=strlen(s);
s[y] = 13;
s[y+1]= 10;
x=write(sockfd,s,y+2);
x=read(sockfd, s,1000);
s[x]=0;
printf("%s>\n",s);
sin_size = sizeof(struct sockaddr_in);
new_fd2 = accept(new_fd, (struct sockad
dr *)&dest_addr,(socklen_t*)&sin_size);
//printf("new_fd2=%d\n",new_fd2);
while(1)
{
x=read(new_fd2, s,1000);
if(x<=0)
break;
fwrite(s,1,x,file);
}
fclose(file);
close(new_fd);
}
else
{
y=strlen(s);
s[y]=13;
s[y+1]= 10;
x=write(sockfd,s,y+2);
}
}
}
close(sockfd);
}
return 0;
}
--
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