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
|
#include "iprange.h"
uint8_t prefix_enabled[] = { 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 };
char *print_prefix_ips = "";
char *print_prefix_nets = "";
char *print_suffix_ips = "";
char *print_suffix_nets = "";
inline void prefix_update_counters(in_addr_t addr, int prefix) {
(void)addr;
if(likely(prefix >= 0 && prefix <= 32))
prefix_counters[prefix]++;
}
inline void print_addr(in_addr_t addr, int prefix) {
prefix_update_counters(addr, prefix);
char buf[IP2STR_MAX_LEN + 1];
if (prefix < 32)
printf("%s%s/%d%s\n", print_prefix_nets, ip2str_r(buf, addr), prefix, print_suffix_nets);
else
printf("%s%s%s\n", print_prefix_ips, ip2str_r(buf, addr), print_suffix_ips);
} /* print_addr() */
/*------------------------------------------------------*/
/* Print out an address range in a.b.c.d-A.B.C.D format */
/*------------------------------------------------------*/
inline void print_addr_range(in_addr_t lo, in_addr_t hi) {
char buf[IP2STR_MAX_LEN + 1];
if(unlikely(lo > hi)) {
/*
* it should never happen
* give a log for the user to see
*/
in_addr_t t = hi;
fprintf(stderr, "%s: WARNING: invalid range reversed start=%s", PROG, ip2str_r(buf, lo));
fprintf(stderr, " end=%s\n", ip2str_r(buf, hi));
hi = lo;
lo = t;
}
if(lo == hi) {
printf("%s%s-", print_prefix_ips, ip2str_r(buf, lo));
printf("%s%s\n", ip2str_r(buf, hi), print_suffix_ips);
}
else {
printf("%s%s-", print_prefix_nets, ip2str_r(buf, lo));
printf("%s%s\n", ip2str_r(buf, hi), print_suffix_nets);
}
}
inline void print_addr_single(in_addr_t x) {
char buf[IP2STR_MAX_LEN + 1];
printf("%s%s%s\n", print_prefix_ips, ip2str_r(buf, x), print_suffix_ips);
}
/*------------------------------------------------------------*/
/* Recursively compute network addresses to cover range lo-hi */
/*------------------------------------------------------------*/
/* Note: Worst case scenario is when lo=0.0.0.1 and hi=255.255.255.254
* We then have 62 CIDR blocks to cover this interval, and 125
* calls to split_range();
* The maximum possible recursion depth is 32.
*/
inline int split_range(in_addr_t addr, int prefix, in_addr_t lo, in_addr_t hi, void (*print)(in_addr_t, int)) {
in_addr_t bc, lower_half, upper_half;
if(unlikely(lo > hi)) {
/*
* it should never happen
* give a log for the user to see
*/
in_addr_t t = hi;
char buf[IP2STR_MAX_LEN + 1];
fprintf(stderr, "%s: WARNING: invalid range reversed start=%s", PROG, ip2str_r(buf, lo));
fprintf(stderr, " end=%s\n", ip2str_r(buf, hi));
hi = lo;
lo = t;
}
if (unlikely((prefix < 0) || (prefix > 32))) {
fprintf(stderr, "%s: Invalid netmask %d!\n", PROG, prefix);
return 0;
}
bc = broadcast(addr, prefix);
if (unlikely((lo < addr) || (hi > bc))) {
fprintf(stderr, "%s: Out of range limits: %x, %x for "
"network %x/%d, broadcast: %x!\n", PROG, lo, hi, addr, prefix, bc);
return 0;
}
if ((lo == addr) && (hi == bc) && prefix_enabled[prefix]) {
print(addr, prefix);
return 1;
}
prefix++;
lower_half = addr;
upper_half = set_bit(addr, prefix, 1);
if (hi < upper_half)
return split_range(lower_half, prefix, lo, hi, print);
else if (lo >= upper_half)
return split_range(upper_half, prefix, lo, hi, print);
else
return (
split_range(lower_half, prefix, lo, broadcast(lower_half, prefix), print) +
split_range(upper_half, prefix, upper_half, hi, print)
);
}
/* ----------------------------------------------------------------------------
* ipset_print()
*
* print the ipset given to stdout
*
*/
void ipset_print(ipset *ips, IPSET_PRINT_CMD print) {
size_t i, n, total = 0;
if(unlikely(!(ips->flags & IPSET_FLAG_OPTIMIZED)))
ipset_optimize(ips);
if(print == PRINT_BINARY) {
ipset_save_binary_v10(ips);
return;
}
if(unlikely(debug)) fprintf(stderr, "%s: Printing %s with %zu ranges, %zu unique IPs\n", PROG, ips->filename, ips->entries, ips->unique_ips);
switch(print) {
case PRINT_CIDR:
/* reset the prefix counters */
for(i = 0; i <= 32; i++)
prefix_counters[i] = 0;
n = ips->entries;
for(i = 0; i < n ;i++)
total += split_range(0, 0, ips->netaddrs[i].addr, ips->netaddrs[i].broadcast, print_addr);
break;
case PRINT_SINGLE_IPS:
n = ips->entries;
for(i = 0; i < n ;i++) {
in_addr_t x, start = ips->netaddrs[i].addr, end = ips->netaddrs[i].broadcast;
if(unlikely(start > end)) {
char buf[IP2STR_MAX_LEN + 1];
fprintf(stderr, "%s: WARNING: invalid range reversed start=%s", PROG, ip2str_r(buf, start));
fprintf(stderr, " end=%s\n", ip2str_r(buf, end));
x = end;
end = start;
start = x;
}
if(unlikely(end - start > (256 * 256 * 256))) {
char buf[IP2STR_MAX_LEN + 1];
fprintf(stderr, "%s: too big range eliminated start=%s", PROG, ip2str_r(buf, start));
fprintf(stderr, " end=%s gives %lu IPs\n", ip2str_r(buf, end), (unsigned long)(end - start));
continue;
}
for( x = start ; x >= start && x <= end ; x++ ) {
print_addr_single(x);
total++;
}
}
break;
default:
n = ips->entries;
for(i = 0; i < n ;i++) {
print_addr_range(ips->netaddrs[i].addr, ips->netaddrs[i].broadcast);
total++;
}
break;
}
/* print prefix break down */
if(unlikely(debug)) {
int prefixes = 0;
if (print == PRINT_CIDR) {
fprintf(stderr, "\n%zu printed CIDRs, break down by prefix:\n", total);
total = 0;
for(i = 0; i <= 32 ;i++) {
if(prefix_counters[i]) {
fprintf(stderr, " - prefix /%zu counts %zu entries\n", i, prefix_counters[i]);
total += prefix_counters[i];
prefixes++;
}
}
}
else if (print == PRINT_SINGLE_IPS) prefixes = 1;
{
char *units;
if (print == PRINT_CIDR) units = "CIDRs";
else if (print == PRINT_SINGLE_IPS) units = "IPs";
else units = "ranges";
fprintf(stderr, "\ntotals: %zu lines read, %zu distinct IP ranges found, %d CIDR prefixes, %zu %s printed, %zu unique IPs\n", ips->lines, ips->entries, prefixes, total, units, ips->unique_ips);
}
}
}
|
