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userv/misc.c

163 lines
3.1 KiB

7 years ago
/*
* UserServer/0.1
* misc.c - Miscellanous functions
*
* Copyright (C) 2002 Gergely Polonkai
* Copyright (C) 2002-2006 P-Team Programmers' Group
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of 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 recieved a copy of the GNU General Public License
* along with this program; if not, write to Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA, 02111-1307, USA.
*
* GNU GPL is in doc/COPYING
*/
#include <string.h>
#include <ctype.h>
#include <stdlib.h>
#include <pwd.h>
#include "userv.h"
#include "functions.h"
char *trim(char *text, char *spc) {
int start, end;
char *b;
if (spc) {
for (start = 0; start < strlen(text); start++)
if (!strchr(spc, *(text + start)))
break;
for (end = strlen(text) - 1; end >= 0; end--)
if (!strchr(spc, *(text + end)))
break;
} else {
for (start = 0; start < strlen(text); start++)
if (!isspace(*(text + start)))
break;
for (end = strlen(text) - 1; end >= 0; end--)
if (!isspace(*(text + end)))
break;
}
if (end == -1)
return NULL;
if ((b = malloc(end - start + 2)) == NULL)
return NULL;
memset(b, 0, end - start + 2);
strncpy(b, text + start, end - start + 1);
return b;
}
int
valid_ip(char *addr) {
int i, np = 0, nn = 0;
if (!addr)
return 0;
if (strlen(addr) > 15)
return 0;
if (!isdigit(addr[0]))
return 0;
for (i = 0; i < strlen(addr); i++) {
if (*(addr + i) == '.')
np++;
if ((*(addr + i) != '.') && (!isdigit(*(addr + i))))
return 0;
}
if (np != 3)
return 0;
np = 0;
for (i = 0; i < strlen(addr); i++) {
if (*(addr + i) == '.') {
if (np)
return 0;
np = 1;
nn = 0;
}
if (*(addr + i) != '.') {
np = 0;
nn++;
if (nn == 4)
return 0;
}
if (i > 0)
if ((*(addr + i - 1) == '0') && (*(addr + i) != '.'))
return 0;
}
if (strcmp(addr, "0.0.0.0") == 0)
return 0;
if (strcmp(addr, "255.255.255.255") == 0)
return 0;
return 1;
}
int
valid_user(char *name) {
if (getpwnam(name) == NULL)
return 0;
return 1;
}
int
ip_allowed(char *IP) {
CST *temp = caddr;
while (temp) {
if (strcmp(IP, temp->IP) == 0)
return 1;
temp = temp->next;
}
return 0;
}
int
user_allowed(char *uname) {
UST *temp = auser;
if (strcmp(uname, "root") == 0)
return 0;
while (temp) {
if (strcmp(uname, temp->uname) == 0)
return 1;
temp = temp->next;
}
return 0;
}
int
IsNum(char *str) {
int i;
if (!str)
return 0;
for (i = 0; i < strlen(str); i++)
if (!isdigit(*(str + i)))
return 0;
return 1;
}