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
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
|
/*
* Copyright (c) 2019 Nikos Mavrogiannopoulos
*
* 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 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 received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <ctype.h>
#include "ipcalc.h"
#include "ipv6.h"
static void deaggregate_v4(const char *ip1s, const char *ip2s, unsigned flags);
static void deaggregate_v6(const char *ip1s, const char *ip2s, unsigned flags);
static char *trim(char *str)
{
int len, i;
char *out;
len = strlen(str);
for (i=len-1;i>=0;i--) {
if (isspace(str[i]))
str[i] = 0;
else
break;
}
out = str;
for (i=0;i<len;i++) {
if (isspace(str[i]))
out++;
else
break;
}
return out;
}
void deaggregate(char *str, unsigned flags)
{
char *d1Str = NULL, *d2Str = NULL;
d1Str = strtok(str, "-");
if (d1Str == NULL) {
if (!beSilent)
fprintf(stderr,
"ipcalc: bad deaggregation string: %s\n", str);
exit(1);
}
d1Str = trim(d1Str);
d2Str = strtok(NULL, "-");
if (d2Str == NULL) {
if (!beSilent)
fprintf(stderr,
"ipcalc: bad deaggregation string: %s\n", str);
exit(1);
}
d2Str = trim(d2Str);
if (flags & FLAG_IPV6)
deaggregate_v6(d1Str, d2Str, flags);
else
deaggregate_v4(d1Str, d2Str, flags);
}
static void print_ipv4_net(unsigned *jsonchain, uint32_t ip, unsigned prefix, unsigned flags)
{
char namebuf[INET_ADDRSTRLEN + 1] = {0};
struct in_addr s;
s.s_addr = htonl(ip);
if (inet_ntop(AF_INET, &s, namebuf, INET_ADDRSTRLEN) == NULL) {
fprintf(stderr, "inet_ntop failure at line %d\n",
__LINE__);
exit(1);
}
default_printf(jsonchain, "Network:\t", NULL, "%s/%u", namebuf, prefix);
}
void deaggregate_v4(const char *ip1s, const char *ip2s, unsigned flags)
{
struct in_addr ip1, ip2;
unsigned step;
uint32_t base, end;
unsigned jsonchain;
if (inet_pton(AF_INET, ip1s, &ip1) <= 0) {
if (!beSilent)
fprintf(stderr, "ipcalc: bad IPv4 address: %s\n",
ip1s);
exit(1);
}
if (inet_pton(AF_INET, ip2s, &ip2) <= 0) {
if (!beSilent)
fprintf(stderr, "ipcalc: bad IPv4 address: %s\n",
ip2s);
exit(1);
}
base = ntohl(ip1.s_addr);
end = ntohl(ip2.s_addr);
if (base > end) {
if (!beSilent)
fprintf(stderr, "ipcalc: bad range\n");
exit(1);
}
output_start(&jsonchain);
array_start(&jsonchain, "Deaggregated networks", "DEAGGREGATEDNETWORK");
while (base <= end) {
step = 0;
while ((base | (1 << step)) != base) {
if ((base | (UINT32_MAX >> (31-step))) > end)
break;
step++;
}
print_ipv4_net(&jsonchain, base, 32-step, flags);
base += (1 << step);
}
array_stop(&jsonchain);
output_stop(&jsonchain);
return;
}
static void print_ipv6_net(unsigned *jsonchain, struct in6_addr *ip, unsigned prefix, unsigned flags)
{
char namebuf[INET6_ADDRSTRLEN + 1] = {0};
if (inet_ntop(AF_INET6, ip, namebuf, sizeof(namebuf)) == NULL) {
fprintf(stderr, "inet_ntop failure at line %d\n",
__LINE__);
exit(1);
}
default_printf(jsonchain, "Network:\t", NULL, "%s/%u", namebuf, prefix);
}
static unsigned ipv6_base_ok(struct in6_addr *base, unsigned step)
{
struct in6_addr b2;
memcpy(&b2, base, sizeof(b2));
ipv6_or1(&b2, step);
return memcmp(base->s6_addr, &b2.s6_addr, 16);
}
void deaggregate_v6(const char *ip1s, const char *ip2s, unsigned flags)
{
struct in6_addr ip1, ip2;
unsigned step;
struct in6_addr base, end;
struct in6_addr tmp;
unsigned jsonchain;
if (inet_pton(AF_INET6, ip1s, &ip1) <= 0) {
if (!beSilent)
fprintf(stderr, "ipcalc: bad IPv6 address: %s\n",
ip1s);
exit(1);
}
if (inet_pton(AF_INET6, ip2s, &ip2) <= 0) {
if (!beSilent)
fprintf(stderr, "ipcalc: bad IPv6 address: %s\n",
ip2s);
exit(1);
}
memcpy(&base, &ip1, sizeof(base));
memcpy(&end, &ip2, sizeof(end));
if (ipv6_cmp(&base, &end) > 0) {
if (!beSilent)
fprintf(stderr, "ipcalc: bad IPv6 range\n");
exit(1);
}
output_start(&jsonchain);
array_start(&jsonchain, "Deaggregated networks", "DEAGGREGATEDNETWORK");
while (ipv6_cmp(&base, &end) <= 0) {
step = 0;
while (ipv6_base_ok(&base, step)) {
memcpy(&tmp, &base, sizeof(tmp));
ipv6_orm(&tmp, step+1);
if (ipv6_cmp(&tmp, &end) > 0)
break;
step++;
}
print_ipv6_net(&jsonchain, &base, 128-step, flags);
memset(&tmp, 0, sizeof(tmp));
ipv6_or1(&tmp, step);
/* v6add */
ipv6_add(&base, &tmp);
}
array_stop(&jsonchain);
output_stop(&jsonchain);
return;
}
|
