Skip to content

Instantly share code, notes, and snippets.

@briankip

briankip/myftpd.c

Last active October 7, 2015 04:51
Show Gist options
  • Save briankip/947b9678283cdbe0cea3 to your computer and use it in GitHub Desktop.
Save briankip/947b9678283cdbe0cea3 to your computer and use it in GitHub Desktop.
Download ZIP

Revisions

  1. @kipropbrian kipropbrian revised this gist Oct 7, 2015. 1 changed file with 29 additions and 35 deletions.
    64 changes: 29 additions & 35 deletions myftpd.c
    View file
    Original file line number Diff line number Diff line change
    @@ -7,13 +7,14 @@

    #define QUEUE 1 //Queue for incoming connections
    #define BUFFLENGTH 512 //Send buffer length

    void fileops(int clientsock);

    int main(int argc , char *argv[])
    {
    int sock_fd, len, newsock;
    int sock_fd, len, newsock, readsize;
    struct sockaddr_in server, client;
    FILE *fp;
    char *file = "oven.f";
    char buffr[BUFFLENGTH];

    if(argc < 2)
    {
    @@ -39,48 +40,41 @@ int main(int argc , char *argv[])
    if( bind(sock_fd,(struct sockaddr *)&server , sizeof(server)) < 0)
    {
    printf("Server bind failed!\n");
    return 1;
    }

    listen(sock_fd , QUEUE);
    printf("Waiting for SYN\n");

    while (newsock = accept(sock_fd, (struct sockaddr *)&client, (socklen_t*)&len)){
    printf("New connection ....\n");
    fileops(newsock);
    printf("New connect from %s.\n", inet_ntoa(client.sin_addr));

    fp = fopen(file, "r");

    if(fp == NULL)
    {
    printf("File 404'd \n");
    return 1;
    }

    bzero(buffr, BUFFLENGTH);
    while((readsize = fread(buffr, sizeof(char), BUFFLENGTH, fp)) > 0)
    {
    int sentbytes;
    sentbytes = send(newsock, buffr, readsize, 0);
    if(sentbytes < 0)
    {
    printf("Send to client failed.\n");
    }
    else if(sentbytes >= readsize) {
    close(newsock);
    }
    bzero(buffr, BUFFLENGTH);
    }
    }
    if (newsock < 0 ){
    printf("Something went wrong\n");
    }
    printf("File sent. So long, and thanks for the fish... \n");
    close(sock_fd);
    close(newsock);
    }

    void fileops(int newsock)
    {
    FILE *fp;
    char *file = "oven.f";
    char buffr[BUFFLENGTH];
    int readsize;

    fp = fopen(file, "r");

    if(fp == NULL)
    {
    printf("File 404'd \n");
    return;
    }

    bzero(buffr, BUFFLENGTH);
    while((readsize = fread(buffr, sizeof(char), BUFFLENGTH, fp)) > 0)
    {
    if((send(newsock, buffr, readsize, 0)) < 0)
    {
    printf("Send to client failed.\n");
    }
    printf("Size = %d\n", readsize);
    printf("Items = %c\n", buffr[2]);
    bzero(buffr, BUFFLENGTH);
    }
    return;
    }
  2. @kipropbrian kipropbrian created this gist Oct 4, 2015.
    86 changes: 86 additions & 0 deletions myftpd.c
    View file
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,86 @@
    #include<stdio.h>
    #include<string.h>
    #include<stdlib.h>
    #include<sys/socket.h>
    #include<arpa/inet.h>
    #include<unistd.h>

    #define QUEUE 1 //Queue for incoming connections
    #define BUFFLENGTH 512 //Send buffer length

    void fileops(int clientsock);

    int main(int argc , char *argv[])
    {
    int sock_fd, len, newsock;
    struct sockaddr_in server, client;

    if(argc < 2)
    {
    printf("Too few arguments. \nUsage : myftpd <port>\n");
    exit(1);
    }

    int port = atoi(argv[1]);

    sock_fd = socket(AF_INET , SOCK_STREAM , 0);

    if (sock_fd == -1)
    {
    printf("Could not create socket!\n");
    }

    //Prepare the sockaddr_in structure
    server.sin_family = AF_INET;
    server.sin_addr.s_addr = INADDR_ANY;
    server.sin_port = htons(port);

    //Bind
    if( bind(sock_fd,(struct sockaddr *)&server , sizeof(server)) < 0)
    {
    printf("Server bind failed!\n");
    }

    listen(sock_fd , QUEUE);
    printf("Waiting for SYN\n");

    while (newsock = accept(sock_fd, (struct sockaddr *)&client, (socklen_t*)&len)){
    printf("New connection ....\n");
    fileops(newsock);
    }
    if (newsock < 0 ){
    printf("Something went wrong\n");
    }
    printf("File sent. So long, and thanks for the fish... \n");
    close(sock_fd);
    close(newsock);
    }

    void fileops(int newsock)
    {
    FILE *fp;
    char *file = "oven.f";
    char buffr[BUFFLENGTH];
    int readsize;

    fp = fopen(file, "r");

    if(fp == NULL)
    {
    printf("File 404'd \n");
    return;
    }

    bzero(buffr, BUFFLENGTH);
    while((readsize = fread(buffr, sizeof(char), BUFFLENGTH, fp)) > 0)
    {
    if((send(newsock, buffr, readsize, 0)) < 0)
    {
    printf("Send to client failed.\n");
    }
    printf("Size = %d\n", readsize);
    printf("Items = %c\n", buffr[2]);
    bzero(buffr, BUFFLENGTH);
    }
    return;
    }