Source File pc/protocol_config.c

    1    | /***************************************
    2    |   $Revision: 1.39 $
    3    |
    4    |   Protocol config module (pc).  This is the protocol that the admin uses to
    5    |   talk to the server.
    6    |
    7    |   Status: NOT REVUED, NOT TESTED
    8    |
    9    |   ******************/ /******************
    10   |   Filename            : protocol_config.c
    11   |   Authors             : ottrey@ripe.net - initial design
    12   |                         marek@ripe.net - restructured and rewritten
    13   |
    14   |   To Do               : Add a facility to take callbacks instead of
    15   |                         hard-coding menu options.
    16   |                         Add in all the menu support provided by the GLib
    17   |                         libraries.
    18   |                         (Remove strtok if multiple threads are to be used.)
    19   | 			use gnu readline with expansion and history
    20   |   ******************/ /******************
    21   |   Copyright (c) 1999,2000,2001,2002               RIPE NCC
    22   |
    23   |   All Rights Reserved
    24   |
    25   |   Permission to use, copy, modify, and distribute this software and its
    26   |   documentation for any purpose and without fee is hereby granted,
    27   |   provided that the above copyright notice appear in all copies and that
    28   |   both that copyright notice and this permission notice appear in
    29   |   supporting documentation, and that the name of the author not be
    30   |   used in advertising or publicity pertaining to distribution of the
    31   |   software without specific, written prior permission.
    32   |
    33   |   THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
    34   |   ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS; IN NO EVENT SHALL
    35   |   AUTHOR BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY
    36   |   DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
    37   |   AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
    38   |   OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
    39   |   ***************************************/
    40   |
    41   | #define PC_IMPL
    42   | #include "rip.h"
    43   |
    44   | #include <stdio.h>
    45   | #include <stdlib.h>
    46   | #include <time.h>
    47   | #include <sys/ioctl.h>
    48   | #include <glib.h>
    49   |
    50   | /*+ Maximum size of input that can be recieved from the client. +*/
    51   | #define MAX_INPUT_SIZE  1024
    52   |
    53   | extern char* crypt(const char *, const char *);   /* crypt stuff */
    54   |
    55   |
    56   | /*++++++++++++++++++++++++++++++++++++++
    57   |
    58   |   Finds a command by name in the array of command function structures.
    59   |
    60   |   int find_command     returns the index to the correct row of the array, or -1
    61   |                        if the command could not be found.
    62   |
    63   |   char *comm_name      name of the command
    64   |
    65   |   Command *comm        array of command function structures.
    66   |   ++++++++++++++++++++++++++++++++++++++*/
    67   | static
    68   | int find_command(char *comm_name, Command *comm)
    69   | {
    70   |   int i;
    71   |   char *comm_buffer = wr_string(comm_name);
    72   |   char *token, *cursor;
    73   |   int index = -1;
    74   |
    75   |   cursor = comm_buffer;
    76   |   if( (token = strsep(&cursor, " \t")) != NULL) {
    77   |     for (i=0; comm[i].name != NULL; i++) {
    78   |       if ( strcmp(token, comm[i].name) == 0) {
    79   | 	index = i;
    80   | 	break;
    81   |       }
    82   |     }
    83   |   }
    84   |
    85   |   UT_free(comm_buffer);
    86   |
    87   |   return index; /* returns -1 when command not found */
    88   | } /* find_command() */
    89   |
    90   |
    91   | int show_commands(Command *comm, char *comm_name, GString *output)
    92   | {
    93   |   int i = 0;
    94   |
    95   |   g_string_sprintfa(output, "%scommands are:\n\n", comm_name);
    96   |   while (comm[i].name != NULL) {
    97   |     g_string_sprintfa(output, "%s\t%s\n", comm[i].name, comm[i].help);
    98   |     i++;
    99   |   }
    100  |
    101  |   return 1;
    102  | } /* show_commands() */
    103  |
    104  |
    105  | /*++++++++++++++++++++++++++++++++++++++
    106  |
    107  |   int command_execute
    108  |                       executes a command from the given array, matching
    109  | 		      given name. Passes input, output and condat to the
    110  | 		      function found in the array. Command name is
    111  | 		      removed from the input line so only next words are
    112  | 		      passed over to the function.
    113  |
    114  | 		      returns the code of the last command. Code
    115  | 		      PC_RET_QUIT is reserved to indicate that the connection
    116  | 		      should be closed.
    117  |
    118  |   Command *comm       array of command function structures (defined in
    119  |                       protocol_config.h)
    120  |
    121  |   char *comm_name     name of the command to be run
    122  |
    123  |   char *input         rest of the command line
    124  |
    125  |   GString *output     dynamically built output string
    126  |
    127  |   sk_conn_st *condat  socket structure for this connection (some commands
    128  |                       use it directly instead of storing the output)
    129  |
    130  |   ++++++++++++++++++++++++++++++++++++++*/
    131  | int command_execute(Command *comm, char *comm_name,
    132  | 		    char *input, GString *output, sk_conn_st *condat)
    133  | {
    134  |   char *name, *next_word, *tmp_input;
    135  |   int index, result=0;
    136  |
    137  |   /* find the command in the string - first whitespace delimited word */
    138  |   /* make a copy of the input */
    139  |   dieif( (tmp_input = wr_string(input)) == NULL );
    140  |   next_word = tmp_input;
    141  |
    142  |   /* find the first word and set the pointer to the rest of the string */
    143  |   name = strsep(&next_word, " \t");
    144  |
    145  |   if( name != NULL && strlen(name) != 0 ) {
    146  |     index = find_command(name, comm);
    147  |     if( index != -1 ) {
    148  |       if( next_word != NULL ) {
    149  | 	/* advance the input pointer to the next word */
    150  | 	while(  *next_word != '\0'
    151  | 		&& isspace( *(unsigned char *)next_word) ) {
    152  | 	  next_word++;
    153  | 	}
    154  |       }
    155  |       else {
    156  | 	next_word = "";
    157  |       }
    158  |
    159  |       /* run, Forrest, run...*/
    160  |       result = comm[index].function(next_word, output, condat);
    161  |     }
    162  |     else {
    163  |       g_string_sprintfa(output, "invalid %scommand: %s\n", comm_name, name);
    164  |       show_commands(comm, comm_name, output);
    165  |       result = 2;
    166  |     }
    167  |   }
    168  |   else {
    169  |     show_commands(comm, comm_name, output);
    170  |     result = 2;
    171  |   }
    172  |
    173  |   UT_free(tmp_input);
    174  |
    175  |   return result;
    176  | } /* command_execute() */
    177  |
    178  |
    179  |
    180  |
    181  |
    182  |
    183  |
    184  | /* proces_input() */
    185  | /*++++++++++++++++++++++++++++++++++++++
    186  |
    187  |   Process the input. Finds the proper command in the top level command
    188  |   array and invokes the function associated with it with the input and
    189  |   output data as arguments.
    190  |
    191  |   int process_input          returns 1 if the connection is to be kept
    192  |                              or 0 when it should be finished - that is,
    193  | 			     when command_execute() returns PC_RET_QUIT.
    194  |
    195  |   char *input                input (presumably a command)
    196  |
    197  |   sk_conn_st *condat         connection data
    198  |
    199  |   More:
    200  |   +html+ <PRE>
    201  |   Author:
    202  |         ottrey
    203  | 	marek - changes and documentation.
    204  |   +html+ </PRE>
    205  |   ++++++++++++++++++++++++++++++++++++++*/
    206  | static
    207  | int process_input(char *input, sk_conn_st *condat)
    208  | {
    209  |   int  index;
    210  |   int res=0;
    211  |   GString *output = g_string_new("");
    212  |
    213  |   index = find_command(input, command);
    214  |
    215  |   switch (index) {
    216  |   case -1:
    217  |     /* Command not found */
    218  |     command_help(NULL, output, condat);
    219  |     break;
    220  |
    221  |   default:
    222  |     res = command_execute(command, "", input, output, condat);
    223  |   }
    224  |
    225  |   if(res != PC_RET_QUIT) {
    226  |     /*
    227  |       printf("thread output=\n%s\n", output);
    228  |     */
    229  |     if ( CO_get_clear_screen() == 1 ) {
    230  |       SK_cd_puts(condat, CLEAR_SCREEN);
    231  |     }
    232  |     SK_cd_puts(condat,  output->str);
    233  |     SK_cd_printf(condat, "\n\n=%d= %s", res, CO_get_prompt());
    234  |
    235  |   }
    236  |
    237  |   g_string_free( output, TRUE );
    238  |
    239  |   /* the return value is the connection state: 1=still open, 0=to be closed
    240  |    */
    241  |
    242  |   return (res != PC_RET_QUIT);
    243  | } /* process_input() */
    244  |
    245  |
    246  | /*++++++++++++++++++++++++++++++++++++++
    247  |
    248  |   Authenticates the user - asks for password and checks it. The password is
    249  |   echoed by the tcp stack, to disable that one would have to attach a tty
    250  |   to this connection and switch to raw mode or try the hard way - renegotiate
    251  |   the telnet connection to switch to character mode (and, possibly, back).
    252  |   The latter has the drawback that to do it right it has to be able to check
    253  |   whether there's telnet on the other side - otherwise, if the connection
    254  |   is made by a program just connecting to the socket, garbage will result.
    255  |   However, in such case password checking might be not a good idea.
    256  |
    257  |   sk_conn_st *condat
    258  |
    259  |   More:
    260  |   +html+ <PRE>
    261  |   Author:
    262  |         ottrey
    263  | 	marek - slight changes and documentation.
    264  |   +html+ </PRE>
    265  |   ++++++++++++++++++++++++++++++++++++++*/
    266  | static
    267  | char *authenticate_user(sk_conn_st *condat)
    268  | {
    269  |   char *user = NULL;
    270  |   const char Salt[2] = "DB";
    271  |   char input[MAX_INPUT_SIZE];
    272  |   int read_result;
    273  |   char *password=NULL;
    274  |   char *user_password=NULL;
    275  |   char user_buf[10];
    276  |
    277  |   SK_cd_puts(condat, LOGIN_PROMPT);
    278  |   read_result = SK_cd_gets(condat, input, MAX_INPUT_SIZE);
    279  |
    280  |   strncpy(user_buf, input, 10);
    281  |
    282  |   SK_cd_puts(condat, PASSWD_PROMPT);
    283  |   /* XXX These aren't working.
    284  |   SK_puts(sock, ECHO_ON);
    285  |   echo_off(sock);
    286  |   */
    287  |   read_result = SK_cd_gets(condat, input, MAX_INPUT_SIZE);
    288  |   /* XXX These aren't working.
    289  |   echo_on(sock);
    290  |   SK_puts(sock, ECHO_OFF);
    291  |   */
    292  |
    293  |   password = crypt(input, Salt);
    294  |
    295  |   user_password = PR_get_property(user_buf, DEFAULT_USER_NAME);
    296  |
    297  |   if (user_password != NULL) {
    298  |     if (strcmp(password, user_password) == 0) {
    299  |       user = UT_strdup(user_buf);
    300  |     }
    301  |   }
    302  |
    303  |
    304  |   return user;
    305  |
    306  | } /* authenticate_user() */
    307  |
    308  |
    309  |
    310  | /*++++++++++++++++++++++++++++++++++++++
    311  |
    312  |   Main function that talks to the user connected on the given socket.
    313  |   Starts by authenticating the user (if this mode is active)
    314  |   and greeting her with the uptime data. Then it loops reading and executing
    315  |   commands until the "quit" command (or any other command that causes
    316  |   process_input to return 0).
    317  |
    318  |   int sock        connected client socket
    319  |
    320  |   ++++++++++++++++++++++++++++++++++++++*/
    321  | void PC_interact(int sock) {
    322  |   char input[MAX_INPUT_SIZE];
    323  |   int connected = 1;
    324  |   char *user=NULL;
    325  |   sk_conn_st condat;
    326  |
    327  |   memset( &condat, 0, sizeof(condat));
    328  |   condat.sock = sock;
    329  |   SK_getpeerip(sock, &(condat.rIP));
    330  |   condat.ip = SK_getpeername(sock); /* XXX *alloc involved */
    331  |
    332  |   /* Welcome the client */
    333  |   SK_cd_puts(&condat, CO_get_welcome());
    334  |
    335  |   /* Authenticate the user */
    336  |   if (CO_get_authenticate() == 1) {
    337  |     user = authenticate_user(&condat);
    338  |
    339  |     if (user == NULL) {
    340  |       ER_inf_va(FAC_PC, ASP_PC_I_SESSION,
    341  | 		"unsuccesful login attempt from %s", condat.ip );
    342  |     }
    343  |   }
    344  |   else {
    345  |     user="nobody";
    346  |   }
    347  |
    348  |   if (user != NULL) {
    349  |
    350  |     /* Log admin logging on */
    351  |     ER_inf_va(FAC_PC, ASP_PC_I_SESSION,
    352  | 		"user %s from %s logged on", user, condat.ip );
    353  |
    354  |     {
    355  |       show_uptime("", NULL, &condat);
    356  |     }
    357  |
    358  |     SK_cd_printf(&condat, "=0= %s", CO_get_prompt());
    359  |
    360  |     while (condat.rtc==0 && connected) {
    361  |       char *icopy;
    362  |
    363  |       /* Read input. Quit if no input (socket closed) */
    364  |       if( SK_cd_gets(&condat, input, MAX_INPUT_SIZE) <= 0 ) {
    365  | 	break;
    366  |       }
    367  |
    368  |       /* filter junk out: leading/trailing/redundant whitespaces */
    369  |       icopy = ut_string_compress( input );
    370  |
    371  |       /* set thread accounting */
    372  |       TA_setactivity(icopy);
    373  |       TA_increment();
    374  |
    375  |       /*      if( strlen(icopy) > 0 ) {*/
    376  |       {
    377  | 	ER_inf_va(FAC_PC, ASP_PC_I_COMMAND, icopy);
    378  |
    379  | 	connected = process_input(icopy, &condat);
    380  |       }
    381  |
    382  |       TA_setactivity("");
    383  |
    384  |       UT_free(icopy);
    385  |     }
    386  |
    387  |     /* Log admin logging off */
    388  |     ER_inf_va(FAC_PC, ASP_PC_I_SESSION,
    389  | 		"user %s from %s logged off", user, condat.ip );
    390  |
    391  |   }
    392  |
    393  |   UT_free(condat.ip);
    394  | } /* PC_interact() */
    395  |