1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
|
/*
Unix SMB/CIFS implementation.
Samba utility functions
Copyright (C) Jelmer Vernooij <jelmer@samba.org> 2008
Copyright (C) Andrew Tridgell 1992-1998
Copyright (C) Jeremy Allison 2001-2002
Copyright (C) Simo Sorce 2001
Copyright (C) Jim McDonough (jmcd@us.ibm.com) 2003.
Copyright (C) James J Myers 2003
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 3 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, see <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
#include "system/network.h"
#include "system/locale.h"
#include "system/filesys.h"
/**
Interpret an internet address or name into an IP address in 4 byte form.
**/
_PUBLIC_ uint32_t interpret_addr(const char *str)
{
struct hostent *hp;
uint32_t res;
if (str == NULL || *str == 0 ||
strcmp(str,"0.0.0.0") == 0) {
return 0;
}
if (strcmp(str,"255.255.255.255") == 0) {
return 0xFFFFFFFF;
}
/* recognise 'localhost' as a special name. This fixes problems with
some hosts that don't have localhost in /etc/hosts */
if (strcasecmp(str,"localhost") == 0) {
str = "127.0.0.1";
}
/* if it's in the form of an IP address then get the lib to interpret it */
if (is_ipaddress(str)) {
res = inet_addr(str);
} else {
/* otherwise assume it's a network name of some sort and use
sys_gethostbyname */
if ((hp = sys_gethostbyname(str)) == 0) {
DEBUG(3,("sys_gethostbyname: Unknown host. %s\n",str));
return 0;
}
if(hp->h_addr == NULL) {
DEBUG(3,("sys_gethostbyname: host address is invalid for host %s\n",str));
return 0;
}
memcpy((char *)&res,(char *)hp->h_addr, 4);
}
if (res == (uint32_t)-1)
return(0);
return(res);
}
/**
A convenient addition to interpret_addr().
**/
_PUBLIC_ struct in_addr interpret_addr2(const char *str)
{
struct in_addr ret;
uint32_t a = interpret_addr(str);
ret.s_addr = a;
return ret;
}
/**
Check if an IP is the 0.0.0.0.
**/
_PUBLIC_ bool is_zero_ip(struct in_addr ip)
{
return ip.s_addr == 0;
}
/**
Are two IPs on the same subnet?
**/
_PUBLIC_ bool same_net_v4(struct in_addr ip1, struct in_addr ip2, struct in_addr mask)
{
uint32_t net1,net2,nmask;
nmask = ntohl(mask.s_addr);
net1 = ntohl(ip1.s_addr);
net2 = ntohl(ip2.s_addr);
return((net1 & nmask) == (net2 & nmask));
}
/**
Return true if a string could be a pure IP address.
**/
_PUBLIC_ bool is_ipaddress(const char *str)
{
bool pure_address = true;
int i;
if (str == NULL) return false;
for (i=0; pure_address && str[i]; i++)
if (!(isdigit((int)str[i]) || str[i] == '.'))
pure_address = false;
/* Check that a pure number is not misinterpreted as an IP */
pure_address = pure_address && (strchr(str, '.') != NULL);
return pure_address;
}
|
