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Commit 595ba25

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manavmehtamanavmehta
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move helpers into helpers.h and helpers.c
1 parent 8d221d6 commit 595ba25

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3 files changed

+247
-218
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3 files changed

+247
-218
lines changed

‎server/helpers.c

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#include <time.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <strings.h>
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#include <string.h>
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#include <arpa/inet.h>
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#include <unistd.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <ctype.h>
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#include <netinet/in.h>
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#include <stdbool.h>
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#include <netdb.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <time.h>
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#include <netinet/tcp.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <dirent.h>
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#define MAXLINE 4096
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#define BACKLOGS 1024
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#define TRUE 1
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#define FALSE 0
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#define GRN "\x1B[32m"
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#define RED "\x1B[31m"
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#define WHT "\x1B[37m"
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#define BLU "\x1B[34m"
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#define YEL "\x1B[33m"
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#define MAG "\x1B[35m"
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#define CYN "\x1B[36m"
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#define RESET "\x1B[0m"
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void rm_lt_spaces(char *str){
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int left = 0, right = strlen(str) - 1;
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while (isspace((unsigned char) str[left]))
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left++;
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while ((right >= left) && isspace((unsigned char) str[right]))
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right--;
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int i;
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for (i = left; i <= right; i++)
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str[i - left] = str[i];
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str[i - left] = '\0';
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return;
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}
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int get_client_ip_port(char *str, char *client_ip, int *client_port){
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printf("Request received\n");
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char *n1, *n2, *n3, *n4, *n5, *n6;
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int x5, x6;
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strtok(str, " ");
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n1 = strtok(NULL, ",");
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n2 = strtok(NULL, ",");
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n3 = strtok(NULL, ",");
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n4 = strtok(NULL, ",");
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n5 = strtok(NULL, ",");
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n6 = strtok(NULL, ",");
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sprintf(client_ip, "%s.%s.%s.%s", n1, n2, n3, n4);
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x5 = atoi(n5);
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x6 = atoi(n6);
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*client_port = (256*x5)+x6;
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printf("client_ip: %s client_port: %d\n", client_ip, *client_port);
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return 1;
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}
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int setup_data_connection(int *fd, char *client_ip, int client_port, int server_port){
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struct sockaddr_in cliaddr, tempaddr;
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if ( (*fd = socket(AF_INET, SOCK_STREAM, 0)) < 0){
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perror("socket error");
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return -1;
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}
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//bind port for data connection to be server port - 1 by using a temporary struct sockaddr_in
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memset(&tempaddr, '\0', sizeof(tempaddr));
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tempaddr.sin_family = AF_INET;
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tempaddr.sin_addr.s_addr = htonl(INADDR_ANY);
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tempaddr.sin_port = htons(server_port-1);
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while((bind(*fd, (struct sockaddr*) &tempaddr, sizeof(tempaddr))) < 0){
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//perror("bind error");
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server_port--;
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tempaddr.sin_port = htons(server_port);
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}
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//initiate data connection fd with client ip and client port
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memset(&cliaddr, '\0', sizeof(cliaddr));
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cliaddr.sin_family = AF_INET;
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cliaddr.sin_port = htons(client_port);
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if (inet_pton(AF_INET, client_ip, &cliaddr.sin_addr) <= 0){
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perror("inet_pton error");
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return -1;
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}
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if (connect(*fd, (struct sockaddr *) &cliaddr, sizeof(cliaddr)) < 0){
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perror("connect error");
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return -1;
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}
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return 1;
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}
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int get_filename(char *input, char *fileptr){
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char *filename = NULL;
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filename = strtok(input, " ");
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filename = strtok(NULL, " ");
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if(filename == NULL){
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return -1;
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}else{
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strncpy(fileptr, filename, strlen(filename));
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return 1;
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}
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}
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int get_cmd_code(char *command){
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char temp_cmd[1024];
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strcpy(temp_cmd, command);
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char *str = strtok(temp_cmd, " ");
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int cmd_code;
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// command code
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if(strcmp(str, "LIST") == 0) cmd_code = 1;
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else if(strcmp(str, "RETR") == 0) cmd_code = 2;
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else if(strcmp(str, "SKIP") == 0) cmd_code = 4;
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else if(strcmp(str, "ABOR") == 0) cmd_code = 5;
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return cmd_code;
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}
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int _ls(int controlfd, int datafd, char *input){
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char filelist[1024], sendline[MAXLINE+1], str[MAXLINE+1];
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memset(filelist, '\0', (int)sizeof(filelist));
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if(get_filename(input, filelist) > 0){
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printf("Filelist Detected\n");
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sprintf(str, "ls %s", filelist);
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printf("Filelist: %s\n", filelist);
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rm_lt_spaces(filelist);
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//verify that given input is valid
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/*struct stat statbuf;
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stat(filelist, &statbuf);
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if(!(S_ISDIR(statbuf.st_mode))) {
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sprintf(sendline, "550 No Such File or Directory\n");
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write(controlfd, sendline, strlen(sendline));
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return -1;
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}*/
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DIR *dir = opendir(filelist);
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if(!dir){
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sprintf(sendline, "550 No Such File or Directory\n");
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write(controlfd, sendline, strlen(sendline));
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return -1;
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}else{closedir(dir);}
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}else{
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sprintf(str, "ls");
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}
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//initiate file pointer for popen()
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FILE *in;
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extern FILE *popen();
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if (!(in = popen(str, "r"))) {
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sprintf(sendline, "451 Requested action aborted. Local error in processing\n");
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write(controlfd, sendline, strlen(sendline));
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return -1;
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}
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while (fgets(sendline, MAXLINE, in) != NULL) {
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write(datafd, sendline, strlen(sendline));
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printf("%s", sendline);
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memset(sendline, '\0', (int)sizeof(sendline));
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}
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sprintf(sendline, "200 Command OK");
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write(controlfd, sendline, strlen(sendline));
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pclose(in);
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return 1;
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}
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int _get(int controlfd, int datafd, char *input){
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char filename[1024], sendline[MAXLINE+1], str[MAXLINE+1];
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memset(filename, '\0', (int)sizeof(filename));
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memset(sendline, '\0', (int)sizeof(sendline));
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memset(str, '\0', (int)sizeof(str));
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if(get_filename(input, filename) > 0){
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sprintf(str, "cat %s", filename);
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if((access(filename, F_OK)) != 0){
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sprintf(sendline, "550 No Such File or Directory\n");
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write(controlfd, sendline, strlen(sendline));
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return -1;
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}
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}else{
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printf("Filename Not Detected\n");
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sprintf(sendline, "450 Requested file action not taken.\nFilename Not Detected\n");
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write(controlfd, sendline, strlen(sendline));
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return -1;
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}
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FILE *in;
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extern FILE *popen();
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if (!(in = popen(str, "r"))) {
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sprintf(sendline, "451 Requested action aborted. Local error in processing\n");
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write(controlfd, sendline, strlen(sendline));
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return -1;
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}
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while (fgets(sendline, MAXLINE, in) != NULL) {
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write(datafd, sendline, strlen(sendline));
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//printf("%s", sendline);
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memset(sendline, '\0', (int)sizeof(sendline));
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}
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sprintf(sendline, "200 Command OK");
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write(controlfd, sendline, strlen(sendline));
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pclose(in);
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return 1;
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}

‎server/helpers.h

Lines changed: 9 additions & 0 deletions
Original file line numberDiff line numberDiff line change
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#include "helpers.c"
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void rm_lt_spaces(char *str);
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int get_client_ip_port(char *str, char *client_ip, int *client_port);
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int setup_data_connection(int *fd, char *client_ip, int client_port, int server_port);
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int get_filename(char *input, char *fileptr);
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int get_cmd_code(char *command);
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int _ls(int controlfd, int datafd, char *input);
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int _get(int controlfd, int datafd, char *input);

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