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LinceMathewLinceMathew
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CN programs
0 parents  commit 667ed68

24 files changed

+572
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lines changed

‎.vscode/settings.json‎

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{
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"files.associations": {
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"fcntl.h": "c",
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"stat.h": "c",
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"inet.h": "c"
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}
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}

‎.vscode/tasks.json‎

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{
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"tasks": [
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{
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"type": "cppbuild",
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"label": "C/C++: gcc-9 build active file",
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"command": "/usr/bin/gcc-9",
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"args": [
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"-fdiagnostics-color=always",
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"-g",
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"${file}",
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"-o",
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"${fileDirname}/${fileBasenameNoExtension}"
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],
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"options": {
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"cwd": "${fileDirname}"
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},
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"problemMatcher": [
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"$gcc"
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],
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"group": {
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"kind": "build",
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"isDefault": true
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},
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"detail": "Task generated by Debugger."
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}
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],
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"version": "2.0.0"
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}

‎FTP/client/a.out‎

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‎FTP/client/ftpclient.c‎

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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <fcntl.h>
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#include <sys/sendfile.h>
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int main(int argv, char *argc[])
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{
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struct sockaddr_in server;
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int bind_test, lfd, choice, size, filehandle, status;
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char buf[100] = "", sBuf[100] = "", filename[20], *f;
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lfd = socket(AF_INET, SOCK_STREAM, 0);
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if (lfd == -1)
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{
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printf("socket creation failed");
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exit(1);
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}
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server.sin_family = AF_INET;
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server.sin_port = atoi(argc[1]);
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server.sin_addr.s_addr = inet_addr("127.0.0.1");
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printf("\nClient ready....");
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bind_test = connect(lfd, (struct sockaddr *)&server, sizeof server);
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if (bind_test == -1)
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{
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printf("Connect Error");
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exit(1);
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}
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int i = 1;
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while (1)
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{
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printf("Enter a choice:\n1- get\n2- quit\n");
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scanf("%d", &choice);
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switch (choice)
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{
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case 1:
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printf("Enter filename to get: ");
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scanf("%s", filename);
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strcpy(buf, "get");
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strcat(buf, filename);
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send(lfd, buf, 100, 0);
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recv(lfd, &size, sizeof(int), 0);
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if (!size)
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{
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printf("No such file on the remote directory\n\n");
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break;
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}
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f = malloc(size);
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recv(lfd, f, size, 0);
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while (1)
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{
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filehandle = open(filename, O_CREAT | O_EXCL | O_WRONLY, 0666);
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if (filehandle == -1)
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{
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sprintf(filename + strlen(filename), "%d", i);
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// needed only if same directory is used for both server and client
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}
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else
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break;
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}
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write(filehandle, f, size, 0);
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close(filehandle);
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strcpy(buf, "cat ");
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strcat(buf, filename);
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system(buf);
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break;
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case 2:
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strcpy(buf, "quit");
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send(lfd, buf, 100, 0);
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recv(lfd, &status, 100, 0);
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if (status)
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{
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printf("Server closed\nQuitting..\n");
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close(lfd);
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exit(0);
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}
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printf("Server failed to close connection\n");
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}
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}
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}

‎FTP/client/sample.txt‎

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sample

‎FTP/client/sample.txt1‎

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sample

‎FTP/ftpserver.c‎

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#include <stdio.h>
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#include <string.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <sys/sendfile.h>
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#include <stdlib.h>
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/*for O_RDONLY*/
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#include <fcntl.h>
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int main()
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{
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struct sockaddr_in client, server;
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struct stat obj;
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int lfd, n, confd, k, size, filehandle;
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char rbuf[100] = "", sBuf[100] = "", filename[20], command[5];
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lfd = socket(AF_INET, SOCK_STREAM, 0);
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server.sin_family = AF_INET;
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server.sin_port = 3500;
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// server.sin_addr.s_addr=inet_addr("127.0.0.1");
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server.sin_addr.s_addr = inet_addr("127.0.0.1");
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k = bind(lfd, (struct sockaddr *)&server, sizeof server);
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if (k == -1)
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{
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printf("Binding error");
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exit(1);
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}
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k = listen(lfd, 1);
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if (k == -1)
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{
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printf("Listen failed");
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exit(1);
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}
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printf("\nServer ready,waiting for client....");
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n = sizeof client;
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confd = accept(lfd, (struct sockaddr *)&client, &n);
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int i = 1;
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while (1)
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{
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recv(confd, rbuf, sizeof rbuf, 0);
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sscanf(rbuf, "%s", command);
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if (!strcmp(command, "get"))
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{
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sscanf(rbuf, "%s%s", filename, filename);
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stat(filename, &obj);
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filehandle = open(filename, O_RDONLY);
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size = obj.st_size;
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if (filehandle == -1)
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size = 0;
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send(confd, &size, sizeof(int), 0);
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if (size)
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sendfile(confd, filehandle, NULL, size);
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}
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else if (!strcmp(command, "bye") || !strcmp(command, "quit"))
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{
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printf("FTP server quitting..\n");
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i = 1;
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send(confd, &i, sizeof(int), 0);
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close(confd);
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close(lfd);
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exit(0);
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}
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}
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return 0;
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}

‎FTP/sample.txt‎

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sample

‎FTP/server‎

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‎FTP/server.c‎

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#include <stdio.h>
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#include <string.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <sys/sendfile.h>
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#include <fcntl.h>
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void main()
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{
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struct sockaddr_in client, server;
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struct stat obj;
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int lfd, n, confd, k, size, filehandle;
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char rbuf[100] = "", sBuf[100] = "", filename[20], command[5];
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lfd = socket(AF_INET, SOCK_STREAM, 0);
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server.sin_family = AF_INET;
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server.sin_port = 3500;
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// server.sin_addr.s_addr=inet_addr("127.0.0.1");
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server.sin_addr.s_addr = inet_addr("127.0.0.1");
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k = bind(lfd, (struct sockaddr *)&server, sizeof server);
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k = listen(lfd, 1);
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printf("\nServer ready,waiting for client....");
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n = sizeof client;
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confd = accept(lfd, (struct sockaddr *)&client, &n);
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int i = 1;
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while (1)
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{
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recv(confd, rbuf, sizeof rbuf, 0);
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sscanf(rbuf, "%s", command);
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if (!strcmp(command, "get"))
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{
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sscanf(rbuf, "%s%s", filename, filename);
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stat(filename, &obj);
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filehandle = open(filename, O_RDONLY);
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size = obj.st_size;
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if (filehandle == -1)
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size = 0;
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send(confd, &size, sizeof(int), 0);
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if (size)
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sendfile(confd, filehandle, NULL, size);
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}
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else if (!strcmp(command, "bye") || !strcmp(command, "quit"))
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{
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printf("FTP server quitting..\n");
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i = 1;
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send(confd, &i, sizeof(int), 0);
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close(confd);
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close(lfd);
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exit(0);
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}
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}
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}

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