hi
i am adjusting a socket program code to make it able to read and write on files and send and recieve packets
but i am stuck it only performs the first while loop and doesn't go to the next lines to execute them !
i dont usually program using C ...but now i have to since i am dealing with linux to write the code !
any help would be really appreciated
i have added the part of reading and writing on files and save them in buffers ...but now i need to exchange data between them
my code
/* udpserver.c */
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <stdio.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <stdlib.h>
int main()
{
/*-------------file reading and buffering------------------*/
int in_count;// counter for input files
char* files_list[]={"input.txt"};// array for input files names to send them to sender
for(in_count=0;in_count<1;in_count++){
//printf("\n %s \n",files_list[in_count]); // test print
}
static const char filename[] = "input.txt";
FILE *file = fopen ( filename, "r" );
int row, clm;
char buffer[128][128];
char line[128]; // line length
for(row=0; row<128; row++)
for(clm=0; clm<128; clm++)
buffer[row][clm] = '\0';
for(row=0; row<128; row++)
line[row] = '\0';
if ( file != NULL ){
row=0;
while ( fgets ( line, sizeof line, file ) != NULL ) // reading line by line from file
{
strcpy(buffer[row], line);
//printf("%s", buffer[row]);
row++;
}
fclose ( file );
}//end if
else
{
printf ("error " ) ;
//perror ( filename ); /* why didn't the file open? */
}//end else
/* -------------------end of file reading------------------*/
int sock;
int addr_len, bytes_read;
char recv_data[1024];
struct sockaddr_in server_addr , client_addr;
if ((sock = socket(AF_INET, SOCK_DGRAM, 0)) == -1) {
perror("Socket");
exit(1);
}
server_addr.sin_family = AF_INET;
server_addr.sin_port = htons(5000);
server_addr.sin_addr.s_addr = INADDR_ANY;
bzero(&(server_addr.sin_zero),8);
if (bind(sock,(struct sockaddr *)&server_addr,
sizeof(struct sockaddr)) == -1)
{
perror("Bind");
exit(1);
}
addr_len = sizeof(struct sockaddr);
printf("\nUDPServer Waiting for client on port 5000");
fflush(stdout);
while (1)// i think the problem is here
{
bytes_read = recvfrom(sock,recv_data,1024,0,
(struct sockaddr *)&client_addr, &addr_len);
recv_data[bytes_read] = '\0';
printf("\n(%s , %d) said : ",inet_ntoa(client_addr.sin_addr),
ntohs(client_addr.sin_port));
printf("%s", recv_data);
fflush(stdout);
}
sendto(sock, files_list[in_count], strlen(files_list[in_count]), 0,
(struct sockaddr *)&client_addr, sizeof(struct sockaddr));// sending file name to the cilent
// recieve
sendto(sock, buffer[0], strlen(buffer[0]), 0,
(struct sockaddr *)&client_addr, sizeof(struct sockaddr));//sending data inside the file
return 0;
}
now i still have to put another recieve ...but its not getting inside the send above it so i left it as comment to add it later ..
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <stdio.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <stdlib.h>
int main()
{
int sock;
struct sockaddr_in server_addr;
struct hostent *host;
char send_data[1024];
char C_buff[1024] ;
int bytes_read;
char *name_files[100];
int addr_len;
host= (struct hostent *) gethostbyname((char *)"127.0.0.1");
if ((sock = socket(AF_INET, SOCK_DGRAM, 0)) == -1)
{
perror("socket");
exit(1);
}
server_addr.sin_family = AF_INET;
server_addr.sin_port = htons(5000);
server_addr.sin_addr = *((struct in_addr *)host->h_addr);
bzero(&(server_addr.sin_zero),8);
while (1)
{
printf("Type Something (q or Q to quit):");
gets(send_data);
if ((strcmp(send_data , "q") == 0) || strcmp(send_data , "Q") == 0)
break;
else
sendto(sock, send_data, strlen(send_data), 0,
(struct sockaddr *)&server_addr, sizeof(struct sockaddr));
}
recvfrom(sock,name_files,1024,0,
(struct sockaddr *)&server_addr, &addr_len);
scanf("%s", name_files[0]);//enter file name choosen
sendto(sock, name_files[0], strlen(name_files[0]), 0,
(struct sockaddr *)&server_addr, sizeof(struct sockaddr));//sending the shosen file name
recvfrom(sock,C_buff,1024,0,
(struct sockaddr *)&server_addr, &addr_len);//recieve files contents from server
//-----------------------writing on a file from buffer---------------
//char * array [] ={"fnj" , "dfg","fgg"};
FILE * fout ;
int i;
fout = fopen("out.txt","w"); /* open the file in */
//for (i=0; i<3; i++)
fprintf(fout,"%s\n",C_buff); /* write */
fclose(fout); /* close the file */
return 0;
}
thanks :)
