1 /*
2 * Copyright (C) 2012 by Darren Reed.
3 *
4 * See the IPFILTER.LICENCE file for details on licencing.
5 *
6 * $Id: parsewhoisline.c,v 1.2.2.5 2012/07/22 08:04:24 darren_r Exp $
7 */
8 #include "ipf.h"
9
10 /*
11 Microsoft Corp MICROSOFT19 (NET-198-136-97-0-1) 198.137.97.0 - 198.137.97.255
12 Microsoft Corp SAVV-S233053-6 (NET-206-79-74-32-1) 206.79.74.32 - 206.79.74.47
13 */
14 int
parsewhoisline(char * line,addrfamily_t * addrp,addrfamily_t * maskp)15 parsewhoisline(char *line, addrfamily_t *addrp, addrfamily_t *maskp)
16 {
17 struct in_addr a1, a2;
18 char *src = line;
19 char *s = NULL;
20
21 if (line == NULL)
22 return (-1);
23
24 while (*src != '\0') {
25 s = strchr(src, '(');
26 if (s == NULL)
27 break;
28
29 if (strncmp(s, "(NET", 4)) {
30 src = s + 1;
31 }
32 break;
33 }
34
35 if (s == NULL)
36 return (-1);
37
38 memset(addrp, 0x00, sizeof(*maskp));
39 memset(maskp, 0x00, sizeof(*maskp));
40
41 if (*(s + 4) == '6') {
42 #ifdef USE_INET6
43 i6addr_t a61, a62;
44
45 s = strchr(s, ')');
46 if (s == NULL || *++s != ' ')
47 return (-1);
48 /*
49 * Parse the IPv6
50 */
51 if (inet_pton(AF_INET6, s, &a61.in6) != 1)
52 return (-1);
53
54 s = strchr(s, ' ');
55 if (s == NULL || strncmp(s, " - ", 3))
56 return (-1);
57
58 s += 3;
59 if (inet_pton(AF_INET6, s, &a62) != 1)
60 return (-1);
61
62 addrp->adf_addr = a61;
63 addrp->adf_family = AF_INET6;
64 addrp->adf_len = offsetof(addrfamily_t, adf_addr) +
65 sizeof(struct in6_addr);
66
67 maskp->adf_addr.i6[0] = ~(a62.i6[0] ^ a61.i6[0]);
68 maskp->adf_addr.i6[1] = ~(a62.i6[1] ^ a61.i6[1]);
69 maskp->adf_addr.i6[2] = ~(a62.i6[2] ^ a61.i6[2]);
70 maskp->adf_addr.i6[3] = ~(a62.i6[3] ^ a61.i6[3]);
71
72 /*
73 * If the mask that's been generated isn't a consecutive mask
74 * then we can't add it into a pool.
75 */
76 if (count6bits(maskp->adf_addr.i6) == -1)
77 return (-1);
78
79 maskp->adf_family = AF_INET6;
80 maskp->adf_len = addrp->adf_len;
81
82 if (IP6_MASKNEQ(&addrp->adf_addr.in6, &maskp->adf_addr.in6,
83 &addrp->adf_addr.in6)) {
84 return (-1);
85 }
86 return (0);
87 #else
88 return (-1);
89 #endif
90 }
91
92 s = strchr(s, ')');
93 if (s == NULL || *++s != ' ')
94 return (-1);
95
96 s++;
97
98 if (inet_aton(s, &a1) != 1)
99 return (-1);
100
101 s = strchr(s, ' ');
102 if (s == NULL || strncmp(s, " - ", 3))
103 return (-1);
104
105 s += 3;
106 if (inet_aton(s, &a2) != 1)
107 return (-1);
108
109 addrp->adf_addr.in4 = a1;
110 addrp->adf_family = AF_INET;
111 addrp->adf_len = offsetof(addrfamily_t, adf_addr) +
112 sizeof(struct in_addr);
113 maskp->adf_addr.in4.s_addr = ~(a2.s_addr ^ a1.s_addr);
114
115 /*
116 * If the mask that's been generated isn't a consecutive mask then
117 * we can't add it into a pool.
118 */
119 if (count4bits(maskp->adf_addr.in4.s_addr) == -1)
120 return (-1);
121
122 maskp->adf_family = AF_INET;
123 maskp->adf_len = addrp->adf_len;
124 bzero((char *)maskp + maskp->adf_len, sizeof(*maskp) - maskp->adf_len);
125 if ((addrp->adf_addr.in4.s_addr & maskp->adf_addr.in4.s_addr) !=
126 addrp->adf_addr.in4.s_addr)
127 return (-1);
128 return (0);
129 }
130