Programming

Hai Friends

I am writing a c program to transfer files from one system to another using TCP/IP socket programming..

My Recieve Program

#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>

extern int errno;
extern char *sys_erlist[];

void receiveFile(int fd);

#define QLEN 5

int main(int argc, char *argv[])
{
struct sockaddr_in fsin;
char *service = "9110";
int msock, ssock, alen;
struct hostent *phe;
struct servent *pse;
struct protoent *ppe;
struct sockaddr_in sin;
int s, type;

bzero((char *)&sin, sizeof(sin));
sin.sin_family = AF_INET;

if(pse = (struct servent *)getservbyname(service, protocol))
sin.sin_port= (u_short)pse->s_port;
else if((sin.sin_port = htons((u_short)atoi(service))) == 0)
printf("Can't get \"%s\" service entry\n", service);

if(phe = (struct hostent *)gethostbyname(host))
bcopy(phe->h_addr, (char *)&sin.sin_addr, phe->h_length);
else if((sin.sin_addr.s_addr = inet_addr(host)) == INADDR_NONE)
printf("Can't get \"%s\" protocol entry.\n", protocol);

if((ppe = (struct protoent *)getprotobyname(protocol)) == 0)
printf("Can't get \"%s\" protocol entry.\n", protocol);

if(strcmp(protocol, "udp") == 0)
type = SOCK_DGRAM;
else
type = SOCK_STREAM;

s = socket(PF_INET, type, ppe->p_proto);
if(s < 0)
printf("Cant create socket\n");

if(connect(s, (struct sockaddr *)&sin, sizeof(sin)) < 0)
printf("Can't connect to %s.%s\n", host, service);

ssock = accept(s, (struct sockaddr *)&sin, &alen);
if(ssock < 0)
printf("Accept Failed.\n");
(void)receiveFile(ssock);
(void)close(ssock);
}

void receiveFile(fd)
int fd;
{
char buf[BUFSIZE];
int BUFSIZE=1024;
int cc;
FILE *fp=fopen("sample","w");
do
{
cc = read(fd, buf, sizeof buf);
fputs(fp,buf);
}while(cc > 0);
fclose(fp);
}

My Transmit Program
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <sys/wait.h>
#include <netinet/in.h>

int main(int argc, char *argv[])
{
int status=0;
int portno=atoi(argv[1]);
// Create a socket. Do a "man socket" to get details. These are
// pretty common defaults for domain, type, and protocol
int s = socket(PF_INET,SOCK_STREAM,0);

if (s <= 0) {
printf("server: Socket creation failed.");
exit(-1);
}

// Connect to server port
sockaddr_in address;
int addressSize = sizeof(sockaddr_in);
address.sin_family=AF_INET; // using INTERNET V4 domain
address.sin_port = htons(portno);
inet_pton(AF_INET,"127.0.0.1",&address.sin_addr); // xlate to internal format

status = connect(s,(struct sockaddr*) &address, addressSize);

if (status != 0) {
printf("client:Connect operation failed, unable to connect to server port.");
exit(-1);
}
int BUFFER_SIZE=1024;
FILE *in = fopen(argv[2],"r");
int len;
char buffer[1024];
while((len = fread(buffer,1,sizeof(buffer),in)) > 0)
{
cout.flush();
send(s,buffer,BUFFER_SIZE,0);
}
fclose(in);
close(s);
return 0;
}

When i run the program my receive program receives twice every data...

Can anyone please figure me out a client/server program to transmit files from one system to another using sockets.

hi collins,

I am using your client/server code for transmitting f ile from one system to another system . I am facing the same problem . Data is being copied twice. Have you resolved that problem or any other solutions please lemme know.

Thank you,
Murali

try this:
---Transmit Program

while((len = fread(buffer,sizeof(buffer),1, in)) > 0)
{
cout.flush();
send(s,buffer,len,0);
}