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/*
LIBSNSP - A C Library for the Simple Network Scanning Protocol
Copyright (C) 2001 Michael R. Kllejan
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/* $Id: cmd.c,v 1.6 2001/09/29 15:13:09 michael Exp $ */
#include <stdio.h>
#include "cmd.h"
#include "reply.h"
#include "snsp_errno.h"
#include "macros.h"
#include "const.h"
snsp_cmd_t *
snsp_cmd_alloc ()
{
snsp_cmd_t *cmd;
if (!(cmd = (snsp_cmd_t *) malloc (sizeof (snsp_cmd_t))))
ERROR(SNSPG_ENOMEM, return NULL;)
cmd->cmd = NULL;
if (!(cmd->parameters = LINKED_LIST_ALLOC))
ERROR(SNSPG_ENOMEM, return NULL;)
return cmd;
}
void
snsp_cmd_free (snsp_cmd_t ** cmd)
{
if (!(cmd)) ERROR ( SNSPG_EPARA, return; )
if (!(*cmd)) ERROR ( SNSPG_EPARA, return; )
if ((*cmd)->cmd)
free ((*cmd)->cmd);
if ((*cmd)->parameters)
LINKED_LIST_FREE (&(*cmd)->parameters);
free (*cmd);
*cmd = NULL;
};
#define STR_ERROR ERROR (SNSPC_ELINETOOLONG, return NULL;)
char *
snsp_cmd_render (snsp_cmd_t *cmd)
{
char *cmd_str = NULL; int cmd_str_cnt = SNSP_CMD_LEN_MAX+1;
int para_cnt = 0, i = 0;
int b_cont_dq = 0, b_cont_ws = 0;
if (!((cmd == NULL) || (cmd->cmd == NULL))) ERROR (SNSPG_EPARA, return NULL;)
if (!(cmd_str = (char*) malloc (SNSP_CMD_LEN_MAX+1)))
ERROR (SNSPG_ENOMEM, return NULL;)
if (strlen(cmd->cmd) != SNSP_CMD_CMD_LEN)
ERROR (SNSPC_ECMDFLSLEN, return NULL;)
for (i = 0; i < SNSP_CMD_CMD_LEN; i++)
if (!(isalpha(cmd->cmd[i])))
ERROR (SNSPC_ECMDILLGCHR, return NULL;)
SSTRCPY (cmd_str, cmd->cmd, cmd_str_cnt, STR_ERROR)
cmd->parameters = LINKED_LIST_FIRST (cmd->parameters);
LINKED_LIST_WALK_BEGIN (cmd->parameters) {
if (strlen(cmd->parameters->data) > SNSP_CMD_PARA_LEN_MAX)
ERROR (SNSPC_EPARATOOLONG, return NULL;)
b_cont_ws = b_cont_dq = 0;
for (i = 0; i < strlen(cmd->parameters->data); i++) {
if (!(snsp_isprint (cmd->parameters->data[i]) ||
snsp_isspace (cmd->parameters->data[i])))
ERROR (SNSPC_EPARAILLGCHR, return NULL;)
if (snsp_isspace (cmd->parameters->data[i])) b_cont_ws = 1;
if (cmd->parameters->data[i] == '\"') b_cont_dq = 1;
};
SSTRCAT (cmd_str, " ", cmd_str_cnt, STR_ERROR);
if (b_cont_dq) ERROR (SNSPC_EPARACONTQUOTE, return NULL;)
if (b_cont_ws) {
SSTRCAT (cmd_str, "\"", cmd_str_cnt, STR_ERROR);
SSTRCAT (cmd_str, cmd->parameters->data, cmd_str_cnt, STR_ERROR);
SSTRCAT (cmd_str, "\"", cmd_str_cnt, STR_ERROR);
} else {
SSTRCAT (cmd_str, cmd->parameters->data, cmd_str_cnt, STR_ERROR);
};
if (++para_cnt == SNSP_CMD_PARA_MAX)
ERROR ( SNSPC_EPARATOOMUCH, return NULL;)
} LINKED_LIST_WALK_END (cmd->parameters)
SSTRCAT (cmd_str, "\n", cmd_str_cnt, STR_ERROR);
return cmd_str;
};
#undef STR_ERROR
#define STR_ERROR goto str_error;
#define MEM_ERROR goto mem_error;
#define PARSE_ERROR goto parse_error;
snsp_cmd_t*
snsp_cmd_parse (char *cmd_str)
{
int cmd_str_len;
snsp_cmd_t *cmd;
char *str;
int i = 0, j = 0, k = 0;
char qs;
if (!cmd_str) PARSE_ERROR;
if (!(cmd_str_len = SSTRLEN (cmd_str, SNSP_CMD_LEN_MAX))) PARSE_ERROR;
if (!(cmd = snsp_cmd_alloc ())) MEM_ERROR;
if (!(str = (char *) malloc (SNSP_CMD_LEN_MAX))) MEM_ERROR;
/* Parse and verify command */
if (cmd_str_len < 4) PARSE_ERROR
for (i = 0; i < SNSP_CMD_CMD_LEN; i++)
if (!(isalpha(cmd_str[i])))
PARSE_ERROR
if (!(cmd->cmd = (char *) malloc (SNSP_CMD_CMD_LEN+1))) MEM_ERROR;
strncpy (cmd->cmd, cmd_str, SNSP_CMD_CMD_LEN);
cmd->cmd[SNSP_CMD_CMD_LEN] = '\0';
/* Parse and verify parameters */
while (1) {
for (k=0; snsp_isspace (cmd_str[i]); i++) {
IFMAX (i, cmd_str_len, STR_ERROR)
//IFMAX (++k-1, SNSP_WHITESPACE_MAX, PARSE_ERROR)
};
qs = (cmd_str[i] == '\"') ? (i++, 1) : 0;
IFMAX (i, cmd_str_len, PARSE_ERROR)
j = 0;
while ((qs) ? (cmd_str[i] != '\"') : (snsp_isspace (cmd_str[i]) == 0)) {
if (snsp_isprint (cmd_str[i]) || snsp_isspace (cmd_str[i]))
str[j++] = cmd_str[i++];
else {
#ifdef DEBUG_NO_TELNET
if (cmd_str[i] == '\n')
#else
if (cmd_str[i] == '\r' )
#endif
break;
else
PARSE_ERROR
};
if (j > SNSP_CMD_PARA_MAX)
goto error;
};
str[j] = '\0';
if (strlen(str) != 0)
LINKED_LIST_PUSH (cmd->parameters, (void *) str, strlen (str) + 1);
#ifdef DEBUG_NO_TELNET
if (cmd_str[i] == '\n')
#else
if (cmd_str[i] == '\r')
#endif
break;
i++;
};
#ifndef DEBUG_NO_TELNET
i++;
#endif
if (i >= cmd_str_len)
goto error;
if (cmd_str[i] == '\n')
goto success;
error:
str_error:
mem_error:
parse_error:
snsp_cmd_free (&cmd);
cmd = NULL;
success:
free (str);
return cmd;
};
#undef STR_ERROR
#undef MEM_ERROR
#undef PARSE_ERROR
snsp_cmd_t *
snsp_cmd_create (char *cmd_cmd, ...)
{
snsp_cmd_t *cmd = snsp_cmd_alloc ();
va_list ap;
char *str;
if (cmd_cmd == NULL)
return NULL;
va_start (ap, cmd_cmd);
cmd->cmd = (char *) malloc (strlen (cmd_cmd) + 1);
strcpy (cmd->cmd, cmd_cmd);
while ((str = va_arg (ap, char *)) != NULL)
LINKED_LIST_PUSH (cmd->parameters, str, strlen (str) + 1);
va_end (ap);
return cmd;
}
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