c - How to check for a <CRLF> for my FTP server -

i have created little ftp server , have few commands available.

here's how check input user see if matches 1 of commands in linked list:

int check_cmd(char *buff, char *cmd) {   int end;    if (strstr(buff, cmd) != buff)     return (-1);   end = strlen(cmd);   if (buff[end] != '\0' && buff[end] != ' ' && buff[end] != '\n')     return (-1);   return (0); }  void read_command(t_client *client, t_cmd *lexer) {   t_cmd *current;    bzero(client->buff, max_read + 1);   server_read(client);   current = lexer;   while (current != null) // go through linked list, checking if matches     {       if (check_cmd(client->buff, current->cmd) == 0) // matches command !         {           current->ptr(client); // calls appropriate function           return ;         }       current = current->next;     }   server_write(client, "invalid command.\n"); } 

but using -c option netcat send \r\n default @ every command, , yet, not check it.

how may check if <crlf> passed through command line?

first thing see end should be:

end = strlen(cmd) - 1; 

because arrays in c accessed index starting 0 not 1.

to check @ end of string determine if end - 1 '\r' , end '\n':

if(buff[end-1] == '\r' && buff[end] == '\n') {   // }