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
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
|
/*
* $Id: ip_util.c,v 1.1 2004/11/14 07:26:26 paulus Exp $
*
* Copyright (C) 1995,1996,1997 Lars Fenneberg
*
* Copyright 1992 Livingston Enterprises, Inc.
*
* Copyright 1992,1993, 1994,1995 The Regents of the University of Michigan
* and Merit Network, Inc. All Rights Reserved
*
* See the file COPYRIGHT for the respective terms and conditions.
* If the file is missing contact me at lf@elemental.net
* and I'll send you a copy.
*
*/
#include <includes.h>
#include <radiusclient.h>
/*
* Function: rc_get_ipaddr
*
* Purpose: return an IP address in host long notation from a host
* name or address in dot notation.
*
* Returns: 0 on failure
*/
UINT4 rc_get_ipaddr (char *host)
{
struct hostent *hp;
if (rc_good_ipaddr (host) == 0)
{
return ntohl(inet_addr (host));
}
else if ((hp = gethostbyname (host)) == (struct hostent *) NULL)
{
error("rc_get_ipaddr: couldn't resolve hostname: %s", host);
return ((UINT4) 0);
}
return ntohl((*(UINT4 *) hp->h_addr));
}
/*
* Function: rc_good_ipaddr
*
* Purpose: check for valid IP address in standard dot notation.
*
* Returns: 0 on success, -1 when failure
*
*/
int rc_good_ipaddr (char *addr)
{
int dot_count;
int digit_count;
if (addr == NULL)
return (-1);
dot_count = 0;
digit_count = 0;
while (*addr != '\0' && *addr != ' ')
{
if (*addr == '.')
{
dot_count++;
digit_count = 0;
}
else if (!isdigit (*addr))
{
dot_count = 5;
}
else
{
digit_count++;
if (digit_count > 3)
{
dot_count = 5;
}
}
addr++;
}
if (dot_count != 3)
{
return (-1);
}
else
{
return (0);
}
}
/*
* Function: rc_ip_hostname
*
* Purpose: Return a printable host name (or IP address in dot notation)
* for the supplied IP address.
*
*/
const char *rc_ip_hostname (UINT4 h_ipaddr)
{
struct hostent *hp;
UINT4 n_ipaddr = htonl (h_ipaddr);
if ((hp = gethostbyaddr ((char *) &n_ipaddr, sizeof (struct in_addr),
AF_INET)) == NULL) {
error("rc_ip_hostname: couldn't look up host by addr: %08lX", h_ipaddr);
}
return ((hp==NULL)?"unknown":hp->h_name);
}
/*
* Function: rc_own_ipaddress
*
* Purpose: get the IP address of this host in host order
*
* Returns: IP address on success, 0 on failure
*
*/
UINT4 rc_own_ipaddress(void)
{
static UINT4 this_host_ipaddr = 0;
if (!this_host_ipaddr) {
if ((this_host_ipaddr = rc_get_ipaddr (hostname)) == 0) {
error("rc_own_ipaddress: couldn't get own IP address");
return 0;
}
}
return this_host_ipaddr;
}
/*
* Function: rc_own_bind_ipaddress
*
* Purpose: get the IP address to be used as a source address
* for sending requests in host order
*
* Returns: IP address
*
*/
UINT4 rc_own_bind_ipaddress(void)
{
char *bindaddr;
UINT4 rval = 0;
if ((bindaddr = rc_conf_str("bindaddr")) == NULL ||
strcmp(rc_conf_str("bindaddr"), "*") == 0) {
rval = INADDR_ANY;
} else {
if ((rval = rc_get_ipaddr(bindaddr)) == 0) {
error("rc_own_bind_ipaddress: couldn't get IP address from bindaddr");
rval = INADDR_ANY;
}
}
return rval;
}
|
