radius-util.cc
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1 /*
2  * Copyright (C) 1996-2017 The Squid Software Foundation and contributors
3  *
4  * Squid software is distributed under GPLv2+ license and includes
5  * contributions from numerous individuals and organizations.
6  * Please see the COPYING and CONTRIBUTORS files for details.
7  */
8 
9 // 2008-05-14: rename to radius-util.* to avoid name clashes with squid util.*
10 /*
11  *
12  * RADIUS
13  * Remote Authentication Dial In User Service
14  *
15  *
16  * Livingston Enterprises, Inc.
17  * 6920 Koll Center Parkway
18  * Pleasanton, CA 94566
19  *
20  * Copyright 1992 Livingston Enterprises, Inc.
21  * Copyright 1997 Cistron Internet Services B.V.
22  *
23  * Permission to use, copy, modify, and distribute this software for any
24  * purpose and without fee is hereby granted, provided that this
25  * copyright and permission notice appear on all copies and supporting
26  * documentation, the name of Livingston Enterprises, Inc. not be used
27  * in advertising or publicity pertaining to distribution of the
28  * program without specific prior permission, and notice be given
29  * in supporting documentation that copying and distribution is by
30  * permission of Livingston Enterprises, Inc.
31  *
32  * Livingston Enterprises, Inc. makes no representations about
33  * the suitability of this software for any purpose. It is
34  * provided "as is" without express or implied warranty.
35  *
36  */
37 
38 /*
39  * util.c Miscellanous generic functions.
40  *
41  */
42 
43 char util_sccsid[] =
44  "@(#)util.c 1.5 Copyright 1992 Livingston Enterprises Inc\n"
45  " 2.1 Copyright 1997 Cistron Internet Services B.V.";
46 
47 #include "squid.h"
49 #include "md5.h"
50 
51 #include <cctype>
52 #include <csignal>
53 #include <ctime>
54 #if HAVE_SYS_SOCKET_H
55 #include <sys/socket.h>
56 #endif
57 #if HAVE_NETINET_IN_H
58 #include <netinet/in.h>
59 #endif
60 #if HAVE_NETDB_H
61 #include <netdb.h>
62 #endif
63 #if HAVE_PWD_H
64 #include <pwd.h>
65 #endif
66 
67 /*
68  * Check for valid IP address in standard dot notation.
69  */
70 static int good_ipaddr(char *addr)
71 {
72  int dot_count;
73  int digit_count;
74 
75  dot_count = 0;
76  digit_count = 0;
77  while (*addr != '\0' && *addr != ' ') {
78  if (*addr == '.') {
79  ++dot_count;
80  digit_count = 0;
81  } else if (!isdigit(*addr)) {
82  dot_count = 5;
83  } else {
84  ++digit_count;
85  if (digit_count > 3) {
86  dot_count = 5;
87  }
88  }
89  ++addr;
90  }
91  if (dot_count != 3) {
92  return(-1);
93  } else {
94  return(0);
95  }
96 }
97 
98 /*
99  * Return an IP address in host long notation from
100  * one supplied in standard dot notation.
101  */
102 static uint32_t ipstr2long(char *ip_str)
103 {
104  char buf[6];
105  char *ptr;
106  int i;
107  int count;
108  uint32_t ipaddr;
109  int cur_byte;
110 
111  ipaddr = (uint32_t)0;
112  for (i = 0; i < 4; ++i) {
113  ptr = buf;
114  count = 0;
115  *ptr = '\0';
116  while (*ip_str != '.' && *ip_str != '\0' && count < 4) {
117  if (!isdigit(*ip_str)) {
118  return((uint32_t)0);
119  }
120  *ptr = *ip_str;
121  ++ptr;
122  ++ip_str;
123  ++count;
124  }
125  if (count >= 4 || count == 0) {
126  return((uint32_t)0);
127  }
128  *ptr = '\0';
129  cur_byte = atoi(buf);
130  if (cur_byte < 0 || cur_byte > 255) {
131  return((uint32_t)0);
132  }
133  ++ip_str;
134  ipaddr = ipaddr << 8 | (uint32_t)cur_byte;
135  }
136  return(ipaddr);
137 }
138 
139 /*
140  * Return an IP address in host long notation from a host
141  * name or address in dot notation.
142  */
143 uint32_t get_ipaddr(char *host)
144 {
145  struct hostent *hp;
146 
147  if (good_ipaddr(host) == 0) {
148  return(ipstr2long(host));
149  } else if ((hp = gethostbyname(host)) == (struct hostent *)NULL) {
150  return((uint32_t)0);
151  }
152  return(ntohl(*(uint32_t *)hp->h_addr));
153 }
154 
static int good_ipaddr(char *addr)
Definition: radius-util.cc:70
static uint32_t ipstr2long(char *ip_str)
Definition: radius-util.cc:102
int i
Definition: membanger.c:49
uint32_t get_ipaddr(char *host)
Definition: radius-util.cc:143
void * addr
Definition: membanger.c:46
void const char * buf
Definition: stub_helper.cc:16
char util_sccsid[]
Definition: radius-util.cc:43
struct hostent * gethostbyname()
#define NULL
Definition: types.h:166

 

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