FTP - UDP - File Transfer Protocol - Networks & DBMS Lab - C Program

Program:

// FTP Client Program: ftpudpc.c

#include<stdio.h>
#include<string.h>
#include<sys/stat.h>
#include<sys/socket.h>
#include<sys/types.h>
#include<netinet/in.h>
#include<arpa/inet.h>
#include<fcntl.h>
#include<stdlib.h>
main()
{
    struct sockaddr_in server,client;
    int s,n,ret;size_t fp;
    char filename[20],downloaded[10],filedata[100],c[25];
    mode_t mode = S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH;
    s=socket(AF_INET,SOCK_DGRAM,0);
    server.sin_family=AF_INET;
    server.sin_port=2000;
    server.sin_addr.s_addr=inet_addr("127.0.0.1");
    n=sizeof(server);
    printf("Enter the name of the file: ");
    scanf("%s",filename);
    printf("\nEnter a name to save: ");
    scanf("%s",downloaded);
    printf("\nDownloading...\n");
    sendto(s,filename,sizeof(filename),0,(struct sockaddr *)&server,n);
    fp = open(downloaded, O_WRONLY | O_CREAT | O_TRUNC, mode);
    if(fp==-1)
    {
        printf("\nError...");
        exit(0);
    }
    recvfrom(s,filedata,sizeof(filedata),0,NULL,NULL);
    printf("\nProcessing Contents...\n");
    while(1)
    {
        if(strcmp(filedata,"end")==0)
            break;
    printf("%s",filedata);
        ret=write(fp,filedata,strlen(filedata));
        bzero(filedata,100);
        recvfrom(s,filedata,sizeof(filedata),0,NULL,NULL);
    }
    printf("\nFile downloaded successfully...\n");
}

// FTP Server Program: ftpudps.c

#include<stdio.h>
#include<sys/types.h>
#include<sys/stat.h>
#include<sys/socket.h>
#include<netinet/in.h>
#include<arpa/inet.h>
#include<fcntl.h>
#include<string.h>

main()
{
    struct sockaddr_in server,client;
    int serversock,n,fp,end;
    char filename[20],buffer[100];
    serversock=socket(AF_INET,SOCK_DGRAM,0);
    server.sin_family=AF_INET;
    server.sin_port=2000;
    server.sin_addr.s_addr=inet_addr("127.0.0.1");
    bind(serversock,(struct sockaddr *)&server,sizeof(server));
    n=sizeof(client);
    recvfrom(serversock,filename,sizeof(filename), 0,(struct sockaddr *)&client,&n);
    fp=open(filename,O_RDONLY);
    while(1)
    {
        end=read(fp,buffer,sizeof(buffer));
        if(end==0)
            break;
        sendto(serversock,buffer,sizeof(buffer),0,(struct sockaddr *)&client,n);
        bzero(buffer,100);
    }
    strcpy(buffer,"end");
    sendto(serversock,buffer,sizeof(buffer),0,(struct sockaddr *)&client,n);
}

// File to be transfered: mybtech.txt

~~My Btech~~
A Computer Science & Engineering Portal
www.2k8cs.tk
www.2k8618.blogspot.com
2008-2012

Output:

Terminal 1: (Client)
nn@linuxmint ~ $ gcc ftpudpc.c -o client
nn@linuxmint ~ $ ./client
Enter the name of the file: mybtech.txt

Enter a name to save: test.txt

Downloading...

Processing Contents...
~~My Btech~~
A Computer Science & Engineering Portal
www.2k8cs.tk
www.2k8618.blogspot.com
2008-2012

File downloaded successfully...
nn@linuxmint ~ $

Terminal 2: (Server)
nn@linuxmint ~ $ gcc ftpudps.c -o server
nn@linuxmint ~ $ ./server
nn@linuxmint ~ $

Database Management Systems (DBMS) - Elmasri, Navathe - Presentation Slides - PPT

Fundamentals of Database Systems

Elmasri, Navathe

Presentation Slides

visit

University of Bridgeport to download ppt..

1.Introduction

2.Databse System Concepts and Architecture

3.Data Modeling Using the Entity-Relationship (ER) Model

4.The Relational Data Model and Relational Database Constraints

5.The Relational Algebra and Calculus 

6.SQL-99: Schema Definition, Basic Constraints, and Queries

7.Functional Dependencies and Normalization for Relational Databases

8.Relational Database Design Algorithms and Further Dependencies

9.Practical Database Design Methodology and Use of UML Diagrams

10.Disk Storage, Basic File Structures, and Hashing

11.Indexing Structures for Files 
12.Introduction to Transaction Processing Concepts and Theory
13.Concurrency Control Techniques
14.Database Recovery Techniques

Kannur University Hall Ticket 2011 Btech Semester 6

 

Kannur university has been released its Hall Ticket for Btech, semester 6, Regular/Supplementary/Improvement Degree Examination 2011.The examination will start on 13th July 2011.Students can download their HALLTICKET as they will be available  in the official website www.kannuruniversity.ac.in on 12th July,2011.

Download B.Tech. S6 Kannur University Hall Ticket 2011 here.

http://117.211.84.98/btech6th/

Kannur University Official Website...
www.kannuruniversity.ac.in.

Kannur University Exam Results - Semester 3 - Regular/Supplimentary/Improvement - Btech -2010

        Kannur University has published B.Tech. semester III examination results 2010. For more information one can visit the official website of kannur university. www.kannuruniversity.ac.in.


Click below link to directly go to the Kannur University Exam result page.

Kannur University Exam Results


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