Line data Source code
1 : /*
2 : * PostgreSQL type definitions for the INET and CIDR types.
3 : *
4 : * src/backend/utils/adt/network.c
5 : *
6 : * Jon Postel RIP 16 Oct 1998
7 : */
8 :
9 : #include "postgres.h"
10 :
11 : #include <sys/socket.h>
12 : #include <netinet/in.h>
13 : #include <arpa/inet.h>
14 :
15 : #include "access/stratnum.h"
16 : #include "catalog/pg_opfamily.h"
17 : #include "catalog/pg_type.h"
18 : #include "common/hashfn.h"
19 : #include "common/ip.h"
20 : #include "lib/hyperloglog.h"
21 : #include "libpq/libpq-be.h"
22 : #include "libpq/pqformat.h"
23 : #include "miscadmin.h"
24 : #include "nodes/makefuncs.h"
25 : #include "nodes/nodeFuncs.h"
26 : #include "nodes/supportnodes.h"
27 : #include "utils/builtins.h"
28 : #include "utils/fmgroids.h"
29 : #include "utils/guc.h"
30 : #include "utils/inet.h"
31 : #include "utils/lsyscache.h"
32 : #include "utils/sortsupport.h"
33 :
34 :
35 : /*
36 : * An IPv4 netmask size is a value in the range of 0 - 32, which is
37 : * represented with 6 bits in inet/cidr abbreviated keys where possible.
38 : *
39 : * An IPv4 inet/cidr abbreviated key can use up to 25 bits for subnet
40 : * component.
41 : */
42 : #define ABBREV_BITS_INET4_NETMASK_SIZE 6
43 : #define ABBREV_BITS_INET4_SUBNET 25
44 :
45 : /* sortsupport for inet/cidr */
46 : typedef struct
47 : {
48 : int64 input_count; /* number of non-null values seen */
49 : bool estimating; /* true if estimating cardinality */
50 :
51 : hyperLogLogState abbr_card; /* cardinality estimator */
52 : } network_sortsupport_state;
53 :
54 : static int32 network_cmp_internal(inet *a1, inet *a2);
55 : static int network_fast_cmp(Datum x, Datum y, SortSupport ssup);
56 : static int network_cmp_abbrev(Datum x, Datum y, SortSupport ssup);
57 : static bool network_abbrev_abort(int memtupcount, SortSupport ssup);
58 : static Datum network_abbrev_convert(Datum original, SortSupport ssup);
59 : static List *match_network_function(Node *leftop,
60 : Node *rightop,
61 : int indexarg,
62 : Oid funcid,
63 : Oid opfamily);
64 : static List *match_network_subset(Node *leftop,
65 : Node *rightop,
66 : bool is_eq,
67 : Oid opfamily);
68 : static bool addressOK(unsigned char *a, int bits, int family);
69 : static inet *internal_inetpl(inet *ip, int64 addend);
70 :
71 :
72 : /*
73 : * Common INET/CIDR input routine
74 : */
75 : static inet *
76 3072 : network_in(char *src, bool is_cidr)
77 : {
78 : int bits;
79 : inet *dst;
80 :
81 3072 : dst = (inet *) palloc0(sizeof(inet));
82 :
83 : /*
84 : * First, check to see if this is an IPv6 or IPv4 address. IPv6 addresses
85 : * will have a : somewhere in them (several, in fact) so if there is one
86 : * present, assume it's V6, otherwise assume it's V4.
87 : */
88 :
89 3072 : if (strchr(src, ':') != NULL)
90 536 : ip_family(dst) = PGSQL_AF_INET6;
91 : else
92 2536 : ip_family(dst) = PGSQL_AF_INET;
93 :
94 3782 : bits = pg_inet_net_pton(ip_family(dst), src, ip_addr(dst),
95 710 : is_cidr ? ip_addrsize(dst) : -1);
96 3072 : if ((bits < 0) || (bits > ip_maxbits(dst)))
97 4 : ereport(ERROR,
98 : (errcode(ERRCODE_INVALID_TEXT_REPRESENTATION),
99 : /* translator: first %s is inet or cidr */
100 : errmsg("invalid input syntax for type %s: \"%s\"",
101 : is_cidr ? "cidr" : "inet", src)));
102 :
103 : /*
104 : * Error check: CIDR values must not have any bits set beyond the masklen.
105 : */
106 3068 : if (is_cidr)
107 : {
108 706 : if (!addressOK(ip_addr(dst), bits, ip_family(dst)))
109 12 : ereport(ERROR,
110 : (errcode(ERRCODE_INVALID_TEXT_REPRESENTATION),
111 : errmsg("invalid cidr value: \"%s\"", src),
112 : errdetail("Value has bits set to right of mask.")));
113 : }
114 :
115 3056 : ip_bits(dst) = bits;
116 3056 : SET_INET_VARSIZE(dst);
117 :
118 3056 : return dst;
119 : }
120 :
121 : Datum
122 2362 : inet_in(PG_FUNCTION_ARGS)
123 : {
124 2362 : char *src = PG_GETARG_CSTRING(0);
125 :
126 2362 : PG_RETURN_INET_P(network_in(src, false));
127 : }
128 :
129 : Datum
130 710 : cidr_in(PG_FUNCTION_ARGS)
131 : {
132 710 : char *src = PG_GETARG_CSTRING(0);
133 :
134 710 : PG_RETURN_INET_P(network_in(src, true));
135 : }
136 :
137 :
138 : /*
139 : * Common INET/CIDR output routine
140 : */
141 : static char *
142 5860 : network_out(inet *src, bool is_cidr)
143 : {
144 : char tmp[sizeof("xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:255.255.255.255/128")];
145 : char *dst;
146 : int len;
147 :
148 5860 : dst = pg_inet_net_ntop(ip_family(src), ip_addr(src), ip_bits(src),
149 : tmp, sizeof(tmp));
150 5860 : if (dst == NULL)
151 0 : ereport(ERROR,
152 : (errcode(ERRCODE_INVALID_BINARY_REPRESENTATION),
153 : errmsg("could not format inet value: %m")));
154 :
155 : /* For CIDR, add /n if not present */
156 5860 : if (is_cidr && strchr(tmp, '/') == NULL)
157 : {
158 406 : len = strlen(tmp);
159 406 : snprintf(tmp + len, sizeof(tmp) - len, "/%u", ip_bits(src));
160 : }
161 :
162 5860 : return pstrdup(tmp);
163 : }
164 :
165 : Datum
166 3774 : inet_out(PG_FUNCTION_ARGS)
167 : {
168 3774 : inet *src = PG_GETARG_INET_PP(0);
169 :
170 3774 : PG_RETURN_CSTRING(network_out(src, false));
171 : }
172 :
173 : Datum
174 2086 : cidr_out(PG_FUNCTION_ARGS)
175 : {
176 2086 : inet *src = PG_GETARG_INET_PP(0);
177 :
178 2086 : PG_RETURN_CSTRING(network_out(src, true));
179 : }
180 :
181 :
182 : /*
183 : * network_recv - converts external binary format to inet
184 : *
185 : * The external representation is (one byte apiece for)
186 : * family, bits, is_cidr, address length, address in network byte order.
187 : *
188 : * Presence of is_cidr is largely for historical reasons, though it might
189 : * allow some code-sharing on the client side. We send it correctly on
190 : * output, but ignore the value on input.
191 : */
192 : static inet *
193 0 : network_recv(StringInfo buf, bool is_cidr)
194 : {
195 : inet *addr;
196 : char *addrptr;
197 : int bits;
198 : int nb,
199 : i;
200 :
201 : /* make sure any unused bits in a CIDR value are zeroed */
202 0 : addr = (inet *) palloc0(sizeof(inet));
203 :
204 0 : ip_family(addr) = pq_getmsgbyte(buf);
205 0 : if (ip_family(addr) != PGSQL_AF_INET &&
206 0 : ip_family(addr) != PGSQL_AF_INET6)
207 0 : ereport(ERROR,
208 : (errcode(ERRCODE_INVALID_BINARY_REPRESENTATION),
209 : /* translator: %s is inet or cidr */
210 : errmsg("invalid address family in external \"%s\" value",
211 : is_cidr ? "cidr" : "inet")));
212 0 : bits = pq_getmsgbyte(buf);
213 0 : if (bits < 0 || bits > ip_maxbits(addr))
214 0 : ereport(ERROR,
215 : (errcode(ERRCODE_INVALID_BINARY_REPRESENTATION),
216 : /* translator: %s is inet or cidr */
217 : errmsg("invalid bits in external \"%s\" value",
218 : is_cidr ? "cidr" : "inet")));
219 0 : ip_bits(addr) = bits;
220 0 : i = pq_getmsgbyte(buf); /* ignore is_cidr */
221 0 : nb = pq_getmsgbyte(buf);
222 0 : if (nb != ip_addrsize(addr))
223 0 : ereport(ERROR,
224 : (errcode(ERRCODE_INVALID_BINARY_REPRESENTATION),
225 : /* translator: %s is inet or cidr */
226 : errmsg("invalid length in external \"%s\" value",
227 : is_cidr ? "cidr" : "inet")));
228 :
229 0 : addrptr = (char *) ip_addr(addr);
230 0 : for (i = 0; i < nb; i++)
231 0 : addrptr[i] = pq_getmsgbyte(buf);
232 :
233 : /*
234 : * Error check: CIDR values must not have any bits set beyond the masklen.
235 : */
236 0 : if (is_cidr)
237 : {
238 0 : if (!addressOK(ip_addr(addr), bits, ip_family(addr)))
239 0 : ereport(ERROR,
240 : (errcode(ERRCODE_INVALID_BINARY_REPRESENTATION),
241 : errmsg("invalid external \"cidr\" value"),
242 : errdetail("Value has bits set to right of mask.")));
243 : }
244 :
245 0 : SET_INET_VARSIZE(addr);
246 :
247 0 : return addr;
248 : }
249 :
250 : Datum
251 0 : inet_recv(PG_FUNCTION_ARGS)
252 : {
253 0 : StringInfo buf = (StringInfo) PG_GETARG_POINTER(0);
254 :
255 0 : PG_RETURN_INET_P(network_recv(buf, false));
256 : }
257 :
258 : Datum
259 0 : cidr_recv(PG_FUNCTION_ARGS)
260 : {
261 0 : StringInfo buf = (StringInfo) PG_GETARG_POINTER(0);
262 :
263 0 : PG_RETURN_INET_P(network_recv(buf, true));
264 : }
265 :
266 :
267 : /*
268 : * network_send - converts inet to binary format
269 : */
270 : static bytea *
271 0 : network_send(inet *addr, bool is_cidr)
272 : {
273 : StringInfoData buf;
274 : char *addrptr;
275 : int nb,
276 : i;
277 :
278 0 : pq_begintypsend(&buf);
279 0 : pq_sendbyte(&buf, ip_family(addr));
280 0 : pq_sendbyte(&buf, ip_bits(addr));
281 0 : pq_sendbyte(&buf, is_cidr);
282 0 : nb = ip_addrsize(addr);
283 0 : if (nb < 0)
284 0 : nb = 0;
285 0 : pq_sendbyte(&buf, nb);
286 0 : addrptr = (char *) ip_addr(addr);
287 0 : for (i = 0; i < nb; i++)
288 0 : pq_sendbyte(&buf, addrptr[i]);
289 0 : return pq_endtypsend(&buf);
290 : }
291 :
292 : Datum
293 0 : inet_send(PG_FUNCTION_ARGS)
294 : {
295 0 : inet *addr = PG_GETARG_INET_PP(0);
296 :
297 0 : PG_RETURN_BYTEA_P(network_send(addr, false));
298 : }
299 :
300 : Datum
301 0 : cidr_send(PG_FUNCTION_ARGS)
302 : {
303 0 : inet *addr = PG_GETARG_INET_PP(0);
304 :
305 0 : PG_RETURN_BYTEA_P(network_send(addr, true));
306 : }
307 :
308 :
309 : Datum
310 1720 : inet_to_cidr(PG_FUNCTION_ARGS)
311 : {
312 1720 : inet *src = PG_GETARG_INET_PP(0);
313 : int bits;
314 :
315 1720 : bits = ip_bits(src);
316 :
317 : /* safety check */
318 1720 : if ((bits < 0) || (bits > ip_maxbits(src)))
319 0 : elog(ERROR, "invalid inet bit length: %d", bits);
320 :
321 1720 : PG_RETURN_INET_P(cidr_set_masklen_internal(src, bits));
322 : }
323 :
324 : Datum
325 100 : inet_set_masklen(PG_FUNCTION_ARGS)
326 : {
327 100 : inet *src = PG_GETARG_INET_PP(0);
328 100 : int bits = PG_GETARG_INT32(1);
329 : inet *dst;
330 :
331 100 : if (bits == -1)
332 32 : bits = ip_maxbits(src);
333 :
334 100 : if ((bits < 0) || (bits > ip_maxbits(src)))
335 0 : ereport(ERROR,
336 : (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
337 : errmsg("invalid mask length: %d", bits)));
338 :
339 : /* clone the original data */
340 100 : dst = (inet *) palloc(VARSIZE_ANY(src));
341 100 : memcpy(dst, src, VARSIZE_ANY(src));
342 :
343 100 : ip_bits(dst) = bits;
344 :
345 100 : PG_RETURN_INET_P(dst);
346 : }
347 :
348 : Datum
349 0 : cidr_set_masklen(PG_FUNCTION_ARGS)
350 : {
351 0 : inet *src = PG_GETARG_INET_PP(0);
352 0 : int bits = PG_GETARG_INT32(1);
353 :
354 0 : if (bits == -1)
355 0 : bits = ip_maxbits(src);
356 :
357 0 : if ((bits < 0) || (bits > ip_maxbits(src)))
358 0 : ereport(ERROR,
359 : (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
360 : errmsg("invalid mask length: %d", bits)));
361 :
362 0 : PG_RETURN_INET_P(cidr_set_masklen_internal(src, bits));
363 : }
364 :
365 : /*
366 : * Copy src and set mask length to 'bits' (which must be valid for the family)
367 : */
368 : inet *
369 1856 : cidr_set_masklen_internal(const inet *src, int bits)
370 : {
371 1856 : inet *dst = (inet *) palloc0(sizeof(inet));
372 :
373 1856 : ip_family(dst) = ip_family(src);
374 1856 : ip_bits(dst) = bits;
375 :
376 1856 : if (bits > 0)
377 : {
378 : Assert(bits <= ip_maxbits(dst));
379 :
380 : /* Clone appropriate bytes of the address, leaving the rest 0 */
381 1856 : memcpy(ip_addr(dst), ip_addr(src), (bits + 7) / 8);
382 :
383 : /* Clear any unwanted bits in the last partial byte */
384 1856 : if (bits % 8)
385 24 : ip_addr(dst)[bits / 8] &= ~(0xFF >> (bits % 8));
386 : }
387 :
388 : /* Set varlena header correctly */
389 1856 : SET_INET_VARSIZE(dst);
390 :
391 1856 : return dst;
392 : }
393 :
394 : /*
395 : * Basic comparison function for sorting and inet/cidr comparisons.
396 : *
397 : * Comparison is first on the common bits of the network part, then on
398 : * the length of the network part, and then on the whole unmasked address.
399 : * The effect is that the network part is the major sort key, and for
400 : * equal network parts we sort on the host part. Note this is only sane
401 : * for CIDR if address bits to the right of the mask are guaranteed zero;
402 : * otherwise logically-equal CIDRs might compare different.
403 : */
404 :
405 : static int32
406 80256 : network_cmp_internal(inet *a1, inet *a2)
407 : {
408 80256 : if (ip_family(a1) == ip_family(a2))
409 : {
410 : int order;
411 :
412 71304 : order = bitncmp(ip_addr(a1), ip_addr(a2),
413 71304 : Min(ip_bits(a1), ip_bits(a2)));
414 71304 : if (order != 0)
415 63734 : return order;
416 7570 : order = ((int) ip_bits(a1)) - ((int) ip_bits(a2));
417 7570 : if (order != 0)
418 996 : return order;
419 6574 : return bitncmp(ip_addr(a1), ip_addr(a2), ip_maxbits(a1));
420 : }
421 :
422 8952 : return ip_family(a1) - ip_family(a2);
423 : }
424 :
425 : Datum
426 236 : network_cmp(PG_FUNCTION_ARGS)
427 : {
428 236 : inet *a1 = PG_GETARG_INET_PP(0);
429 236 : inet *a2 = PG_GETARG_INET_PP(1);
430 :
431 236 : PG_RETURN_INT32(network_cmp_internal(a1, a2));
432 : }
433 :
434 : /*
435 : * SortSupport strategy routine
436 : */
437 : Datum
438 242 : network_sortsupport(PG_FUNCTION_ARGS)
439 : {
440 242 : SortSupport ssup = (SortSupport) PG_GETARG_POINTER(0);
441 :
442 242 : ssup->comparator = network_fast_cmp;
443 242 : ssup->ssup_extra = NULL;
444 :
445 242 : if (ssup->abbreviate)
446 : {
447 : network_sortsupport_state *uss;
448 : MemoryContext oldcontext;
449 :
450 112 : oldcontext = MemoryContextSwitchTo(ssup->ssup_cxt);
451 :
452 112 : uss = palloc(sizeof(network_sortsupport_state));
453 112 : uss->input_count = 0;
454 112 : uss->estimating = true;
455 112 : initHyperLogLog(&uss->abbr_card, 10);
456 :
457 112 : ssup->ssup_extra = uss;
458 :
459 112 : ssup->comparator = network_cmp_abbrev;
460 112 : ssup->abbrev_converter = network_abbrev_convert;
461 112 : ssup->abbrev_abort = network_abbrev_abort;
462 112 : ssup->abbrev_full_comparator = network_fast_cmp;
463 :
464 112 : MemoryContextSwitchTo(oldcontext);
465 : }
466 :
467 242 : PG_RETURN_VOID();
468 : }
469 :
470 : /*
471 : * SortSupport comparison func
472 : */
473 : static int
474 31528 : network_fast_cmp(Datum x, Datum y, SortSupport ssup)
475 : {
476 31528 : inet *arg1 = DatumGetInetPP(x);
477 31528 : inet *arg2 = DatumGetInetPP(y);
478 :
479 31528 : return network_cmp_internal(arg1, arg2);
480 : }
481 :
482 : /*
483 : * Abbreviated key comparison func
484 : */
485 : static int
486 3956 : network_cmp_abbrev(Datum x, Datum y, SortSupport ssup)
487 : {
488 3956 : if (x > y)
489 1856 : return 1;
490 2100 : else if (x == y)
491 508 : return 0;
492 : else
493 1592 : return -1;
494 : }
495 :
496 : /*
497 : * Callback for estimating effectiveness of abbreviated key optimization.
498 : *
499 : * We pay no attention to the cardinality of the non-abbreviated data, because
500 : * there is no equality fast-path within authoritative inet comparator.
501 : */
502 : static bool
503 28 : network_abbrev_abort(int memtupcount, SortSupport ssup)
504 : {
505 28 : network_sortsupport_state *uss = ssup->ssup_extra;
506 : double abbr_card;
507 :
508 28 : if (memtupcount < 10000 || uss->input_count < 10000 || !uss->estimating)
509 28 : return false;
510 :
511 0 : abbr_card = estimateHyperLogLog(&uss->abbr_card);
512 :
513 : /*
514 : * If we have >100k distinct values, then even if we were sorting many
515 : * billion rows we'd likely still break even, and the penalty of undoing
516 : * that many rows of abbrevs would probably not be worth it. At this point
517 : * we stop counting because we know that we're now fully committed.
518 : */
519 0 : if (abbr_card > 100000.0)
520 : {
521 : #ifdef TRACE_SORT
522 0 : if (trace_sort)
523 0 : elog(LOG,
524 : "network_abbrev: estimation ends at cardinality %f"
525 : " after " INT64_FORMAT " values (%d rows)",
526 : abbr_card, uss->input_count, memtupcount);
527 : #endif
528 0 : uss->estimating = false;
529 0 : return false;
530 : }
531 :
532 : /*
533 : * Target minimum cardinality is 1 per ~2k of non-null inputs. 0.5 row
534 : * fudge factor allows us to abort earlier on genuinely pathological data
535 : * where we've had exactly one abbreviated value in the first 2k
536 : * (non-null) rows.
537 : */
538 0 : if (abbr_card < uss->input_count / 2000.0 + 0.5)
539 : {
540 : #ifdef TRACE_SORT
541 0 : if (trace_sort)
542 0 : elog(LOG,
543 : "network_abbrev: aborting abbreviation at cardinality %f"
544 : " below threshold %f after " INT64_FORMAT " values (%d rows)",
545 : abbr_card, uss->input_count / 2000.0 + 0.5, uss->input_count,
546 : memtupcount);
547 : #endif
548 0 : return true;
549 : }
550 :
551 : #ifdef TRACE_SORT
552 0 : if (trace_sort)
553 0 : elog(LOG,
554 : "network_abbrev: cardinality %f after " INT64_FORMAT
555 : " values (%d rows)", abbr_card, uss->input_count, memtupcount);
556 : #endif
557 :
558 0 : return false;
559 : }
560 :
561 : /*
562 : * SortSupport conversion routine. Converts original inet/cidr representation
563 : * to abbreviated key representation that works with simple 3-way unsigned int
564 : * comparisons. The network_cmp_internal() rules for sorting inet/cidr datums
565 : * are followed by abbreviated comparisons by an encoding scheme that
566 : * conditions keys through careful use of padding.
567 : *
568 : * Some background: inet values have three major components (take for example
569 : * the address 1.2.3.4/24):
570 : *
571 : * * A network, or netmasked bits (1.2.3.0).
572 : * * A netmask size (/24).
573 : * * A subnet, or bits outside of the netmask (0.0.0.4).
574 : *
575 : * cidr values are the same except that with only the first two components --
576 : * all their subnet bits *must* be zero (1.2.3.0/24).
577 : *
578 : * IPv4 and IPv6 are identical in this makeup, with the difference being that
579 : * IPv4 addresses have a maximum of 32 bits compared to IPv6's 64 bits, so in
580 : * IPv6 each part may be larger.
581 : *
582 : * inet/cidr types compare using these sorting rules. If inequality is detected
583 : * at any step, comparison is finished. If any rule is a tie, the algorithm
584 : * drops through to the next to break it:
585 : *
586 : * 1. IPv4 always appears before IPv6.
587 : * 2. Network bits are compared.
588 : * 3. Netmask size is compared.
589 : * 4. All bits are compared (having made it here, we know that both
590 : * netmasked bits and netmask size are equal, so we're in effect only
591 : * comparing subnet bits).
592 : *
593 : * When generating abbreviated keys for SortSupport, we pack as much as we can
594 : * into a datum while ensuring that when comparing those keys as integers,
595 : * these rules will be respected. Exact contents depend on IP family and datum
596 : * size.
597 : *
598 : * IPv4
599 : * ----
600 : *
601 : * 4 byte datums:
602 : *
603 : * Start with 1 bit for the IP family (IPv4 or IPv6; this bit is present in
604 : * every case below) followed by all but 1 of the netmasked bits.
605 : *
606 : * +----------+---------------------+
607 : * | 1 bit IP | 31 bits network | (1 bit network
608 : * | family | (truncated) | omitted)
609 : * +----------+---------------------+
610 : *
611 : * 8 byte datums:
612 : *
613 : * We have space to store all netmasked bits, followed by the netmask size,
614 : * followed by 25 bits of the subnet (25 bits is usually more than enough in
615 : * practice). cidr datums always have all-zero subnet bits.
616 : *
617 : * +----------+-----------------------+--------------+--------------------+
618 : * | 1 bit IP | 32 bits network | 6 bits | 25 bits subnet |
619 : * | family | (full) | network size | (truncated) |
620 : * +----------+-----------------------+--------------+--------------------+
621 : *
622 : * IPv6
623 : * ----
624 : *
625 : * 4 byte datums:
626 : *
627 : * +----------+---------------------+
628 : * | 1 bit IP | 31 bits network | (up to 97 bits
629 : * | family | (truncated) | network omitted)
630 : * +----------+---------------------+
631 : *
632 : * 8 byte datums:
633 : *
634 : * +----------+---------------------------------+
635 : * | 1 bit IP | 63 bits network | (up to 65 bits
636 : * | family | (truncated) | network omitted)
637 : * +----------+---------------------------------+
638 : */
639 : static Datum
640 1048 : network_abbrev_convert(Datum original, SortSupport ssup)
641 : {
642 1048 : network_sortsupport_state *uss = ssup->ssup_extra;
643 1048 : inet *authoritative = DatumGetInetPP(original);
644 : Datum res,
645 : ipaddr_datum,
646 : subnet_bitmask,
647 : network;
648 : int subnet_size;
649 :
650 : Assert(ip_family(authoritative) == PGSQL_AF_INET ||
651 : ip_family(authoritative) == PGSQL_AF_INET6);
652 :
653 : /*
654 : * Get an unsigned integer representation of the IP address by taking its
655 : * first 4 or 8 bytes. Always take all 4 bytes of an IPv4 address. Take
656 : * the first 8 bytes of an IPv6 address with an 8 byte datum and 4 bytes
657 : * otherwise.
658 : *
659 : * We're consuming an array of unsigned char, so byteswap on little endian
660 : * systems (an inet's ipaddr field stores the most significant byte
661 : * first).
662 : */
663 1048 : if (ip_family(authoritative) == PGSQL_AF_INET)
664 : {
665 : uint32 ipaddr_datum32;
666 :
667 796 : memcpy(&ipaddr_datum32, ip_addr(authoritative), sizeof(uint32));
668 :
669 : /* Must byteswap on little-endian machines */
670 : #ifndef WORDS_BIGENDIAN
671 796 : ipaddr_datum = pg_bswap32(ipaddr_datum32);
672 : #else
673 : ipaddr_datum = ipaddr_datum32;
674 : #endif
675 :
676 : /* Initialize result without setting ipfamily bit */
677 796 : res = (Datum) 0;
678 : }
679 : else
680 : {
681 252 : memcpy(&ipaddr_datum, ip_addr(authoritative), sizeof(Datum));
682 :
683 : /* Must byteswap on little-endian machines */
684 252 : ipaddr_datum = DatumBigEndianToNative(ipaddr_datum);
685 :
686 : /* Initialize result with ipfamily (most significant) bit set */
687 252 : res = ((Datum) 1) << (SIZEOF_DATUM * BITS_PER_BYTE - 1);
688 : }
689 :
690 : /*
691 : * ipaddr_datum must be "split": high order bits go in "network" component
692 : * of abbreviated key (often with zeroed bits at the end due to masking),
693 : * while low order bits go in "subnet" component when there is space for
694 : * one. This is often accomplished by generating a temp datum subnet
695 : * bitmask, which we may reuse later when generating the subnet bits
696 : * themselves. (Note that subnet bits are only used with IPv4 datums on
697 : * platforms where datum is 8 bytes.)
698 : *
699 : * The number of bits in subnet is used to generate a datum subnet
700 : * bitmask. For example, with a /24 IPv4 datum there are 8 subnet bits
701 : * (since 32 - 24 is 8), so the final subnet bitmask is B'1111 1111'. We
702 : * need explicit handling for cases where the ipaddr bits cannot all fit
703 : * in a datum, though (otherwise we'd incorrectly mask the network
704 : * component with IPv6 values).
705 : */
706 1048 : subnet_size = ip_maxbits(authoritative) - ip_bits(authoritative);
707 : Assert(subnet_size >= 0);
708 : /* subnet size must work with prefix ipaddr cases */
709 1048 : subnet_size %= SIZEOF_DATUM * BITS_PER_BYTE;
710 1048 : if (ip_bits(authoritative) == 0)
711 : {
712 : /* Fit as many ipaddr bits as possible into subnet */
713 112 : subnet_bitmask = ((Datum) 0) - 1;
714 112 : network = 0;
715 : }
716 936 : else if (ip_bits(authoritative) < SIZEOF_DATUM * BITS_PER_BYTE)
717 : {
718 : /* Split ipaddr bits between network and subnet */
719 796 : subnet_bitmask = (((Datum) 1) << subnet_size) - 1;
720 796 : network = ipaddr_datum & ~subnet_bitmask;
721 : }
722 : else
723 : {
724 : /* Fit as many ipaddr bits as possible into network */
725 140 : subnet_bitmask = 0;
726 140 : network = ipaddr_datum;
727 : }
728 :
729 : #if SIZEOF_DATUM == 8
730 1048 : if (ip_family(authoritative) == PGSQL_AF_INET)
731 : {
732 : /*
733 : * IPv4 with 8 byte datums: keep all 32 netmasked bits, netmask size,
734 : * and most significant 25 subnet bits
735 : */
736 796 : Datum netmask_size = (Datum) ip_bits(authoritative);
737 : Datum subnet;
738 :
739 : /*
740 : * Shift left 31 bits: 6 bits netmask size + 25 subnet bits.
741 : *
742 : * We don't make any distinction between network bits that are zero
743 : * due to masking and "true"/non-masked zero bits. An abbreviated
744 : * comparison that is resolved by comparing a non-masked and non-zero
745 : * bit to a masked/zeroed bit is effectively resolved based on
746 : * ip_bits(), even though the comparison won't reach the netmask_size
747 : * bits.
748 : */
749 796 : network <<= (ABBREV_BITS_INET4_NETMASK_SIZE +
750 : ABBREV_BITS_INET4_SUBNET);
751 :
752 : /* Shift size to make room for subnet bits at the end */
753 796 : netmask_size <<= ABBREV_BITS_INET4_SUBNET;
754 :
755 : /* Extract subnet bits without shifting them */
756 796 : subnet = ipaddr_datum & subnet_bitmask;
757 :
758 : /*
759 : * If we have more than 25 subnet bits, we can't fit everything. Shift
760 : * subnet down to avoid clobbering bits that are only supposed to be
761 : * used for netmask_size.
762 : *
763 : * Discarding the least significant subnet bits like this is correct
764 : * because abbreviated comparisons that are resolved at the subnet
765 : * level must have had equal netmask_size/ip_bits() values in order to
766 : * get that far.
767 : */
768 796 : if (subnet_size > ABBREV_BITS_INET4_SUBNET)
769 96 : subnet >>= subnet_size - ABBREV_BITS_INET4_SUBNET;
770 :
771 : /*
772 : * Assemble the final abbreviated key without clobbering the ipfamily
773 : * bit that must remain a zero.
774 : */
775 796 : res |= network | netmask_size | subnet;
776 : }
777 : else
778 : #endif
779 : {
780 : /*
781 : * 4 byte datums, or IPv6 with 8 byte datums: Use as many of the
782 : * netmasked bits as will fit in final abbreviated key. Avoid
783 : * clobbering the ipfamily bit that was set earlier.
784 : */
785 252 : res |= network >> 1;
786 : }
787 :
788 1048 : uss->input_count += 1;
789 :
790 : /* Hash abbreviated key */
791 1048 : if (uss->estimating)
792 : {
793 : uint32 tmp;
794 :
795 : #if SIZEOF_DATUM == 8
796 1048 : tmp = (uint32) res ^ (uint32) ((uint64) res >> 32);
797 : #else /* SIZEOF_DATUM != 8 */
798 : tmp = (uint32) res;
799 : #endif
800 :
801 1048 : addHyperLogLog(&uss->abbr_card, DatumGetUInt32(hash_uint32(tmp)));
802 : }
803 :
804 1048 : return res;
805 : }
806 :
807 : /*
808 : * Boolean ordering tests.
809 : */
810 : Datum
811 11034 : network_lt(PG_FUNCTION_ARGS)
812 : {
813 11034 : inet *a1 = PG_GETARG_INET_PP(0);
814 11034 : inet *a2 = PG_GETARG_INET_PP(1);
815 :
816 11034 : PG_RETURN_BOOL(network_cmp_internal(a1, a2) < 0);
817 : }
818 :
819 : Datum
820 9182 : network_le(PG_FUNCTION_ARGS)
821 : {
822 9182 : inet *a1 = PG_GETARG_INET_PP(0);
823 9182 : inet *a2 = PG_GETARG_INET_PP(1);
824 :
825 9182 : PG_RETURN_BOOL(network_cmp_internal(a1, a2) <= 0);
826 : }
827 :
828 : Datum
829 6968 : network_eq(PG_FUNCTION_ARGS)
830 : {
831 6968 : inet *a1 = PG_GETARG_INET_PP(0);
832 6968 : inet *a2 = PG_GETARG_INET_PP(1);
833 :
834 6968 : PG_RETURN_BOOL(network_cmp_internal(a1, a2) == 0);
835 : }
836 :
837 : Datum
838 9518 : network_ge(PG_FUNCTION_ARGS)
839 : {
840 9518 : inet *a1 = PG_GETARG_INET_PP(0);
841 9518 : inet *a2 = PG_GETARG_INET_PP(1);
842 :
843 9518 : PG_RETURN_BOOL(network_cmp_internal(a1, a2) >= 0);
844 : }
845 :
846 : Datum
847 11466 : network_gt(PG_FUNCTION_ARGS)
848 : {
849 11466 : inet *a1 = PG_GETARG_INET_PP(0);
850 11466 : inet *a2 = PG_GETARG_INET_PP(1);
851 :
852 11466 : PG_RETURN_BOOL(network_cmp_internal(a1, a2) > 0);
853 : }
854 :
855 : Datum
856 68 : network_ne(PG_FUNCTION_ARGS)
857 : {
858 68 : inet *a1 = PG_GETARG_INET_PP(0);
859 68 : inet *a2 = PG_GETARG_INET_PP(1);
860 :
861 68 : PG_RETURN_BOOL(network_cmp_internal(a1, a2) != 0);
862 : }
863 :
864 : /*
865 : * MIN/MAX support functions.
866 : */
867 : Datum
868 128 : network_smaller(PG_FUNCTION_ARGS)
869 : {
870 128 : inet *a1 = PG_GETARG_INET_PP(0);
871 128 : inet *a2 = PG_GETARG_INET_PP(1);
872 :
873 128 : if (network_cmp_internal(a1, a2) < 0)
874 76 : PG_RETURN_INET_P(a1);
875 : else
876 52 : PG_RETURN_INET_P(a2);
877 : }
878 :
879 : Datum
880 128 : network_larger(PG_FUNCTION_ARGS)
881 : {
882 128 : inet *a1 = PG_GETARG_INET_PP(0);
883 128 : inet *a2 = PG_GETARG_INET_PP(1);
884 :
885 128 : if (network_cmp_internal(a1, a2) > 0)
886 104 : PG_RETURN_INET_P(a1);
887 : else
888 24 : PG_RETURN_INET_P(a2);
889 : }
890 :
891 : /*
892 : * Support function for hash indexes on inet/cidr.
893 : */
894 : Datum
895 40 : hashinet(PG_FUNCTION_ARGS)
896 : {
897 40 : inet *addr = PG_GETARG_INET_PP(0);
898 40 : int addrsize = ip_addrsize(addr);
899 :
900 : /* XXX this assumes there are no pad bytes in the data structure */
901 40 : return hash_any((unsigned char *) VARDATA_ANY(addr), addrsize + 2);
902 : }
903 :
904 : Datum
905 40 : hashinetextended(PG_FUNCTION_ARGS)
906 : {
907 40 : inet *addr = PG_GETARG_INET_PP(0);
908 40 : int addrsize = ip_addrsize(addr);
909 :
910 40 : return hash_any_extended((unsigned char *) VARDATA_ANY(addr), addrsize + 2,
911 40 : PG_GETARG_INT64(1));
912 : }
913 :
914 : /*
915 : * Boolean network-inclusion tests.
916 : */
917 : Datum
918 4088 : network_sub(PG_FUNCTION_ARGS)
919 : {
920 4088 : inet *a1 = PG_GETARG_INET_PP(0);
921 4088 : inet *a2 = PG_GETARG_INET_PP(1);
922 :
923 4088 : if (ip_family(a1) == ip_family(a2))
924 : {
925 3288 : PG_RETURN_BOOL(ip_bits(a1) > ip_bits(a2) &&
926 : bitncmp(ip_addr(a1), ip_addr(a2), ip_bits(a2)) == 0);
927 : }
928 :
929 800 : PG_RETURN_BOOL(false);
930 : }
931 :
932 : Datum
933 6604 : network_subeq(PG_FUNCTION_ARGS)
934 : {
935 6604 : inet *a1 = PG_GETARG_INET_PP(0);
936 6604 : inet *a2 = PG_GETARG_INET_PP(1);
937 :
938 6604 : if (ip_family(a1) == ip_family(a2))
939 : {
940 4092 : PG_RETURN_BOOL(ip_bits(a1) >= ip_bits(a2) &&
941 : bitncmp(ip_addr(a1), ip_addr(a2), ip_bits(a2)) == 0);
942 : }
943 :
944 2512 : PG_RETURN_BOOL(false);
945 : }
946 :
947 : Datum
948 4120 : network_sup(PG_FUNCTION_ARGS)
949 : {
950 4120 : inet *a1 = PG_GETARG_INET_PP(0);
951 4120 : inet *a2 = PG_GETARG_INET_PP(1);
952 :
953 4120 : if (ip_family(a1) == ip_family(a2))
954 : {
955 3320 : PG_RETURN_BOOL(ip_bits(a1) < ip_bits(a2) &&
956 : bitncmp(ip_addr(a1), ip_addr(a2), ip_bits(a1)) == 0);
957 : }
958 :
959 800 : PG_RETURN_BOOL(false);
960 : }
961 :
962 : Datum
963 12376 : network_supeq(PG_FUNCTION_ARGS)
964 : {
965 12376 : inet *a1 = PG_GETARG_INET_PP(0);
966 12376 : inet *a2 = PG_GETARG_INET_PP(1);
967 :
968 12376 : if (ip_family(a1) == ip_family(a2))
969 : {
970 6816 : PG_RETURN_BOOL(ip_bits(a1) <= ip_bits(a2) &&
971 : bitncmp(ip_addr(a1), ip_addr(a2), ip_bits(a1)) == 0);
972 : }
973 :
974 5560 : PG_RETURN_BOOL(false);
975 : }
976 :
977 : Datum
978 14020 : network_overlap(PG_FUNCTION_ARGS)
979 : {
980 14020 : inet *a1 = PG_GETARG_INET_PP(0);
981 14020 : inet *a2 = PG_GETARG_INET_PP(1);
982 :
983 14020 : if (ip_family(a1) == ip_family(a2))
984 : {
985 8532 : PG_RETURN_BOOL(bitncmp(ip_addr(a1), ip_addr(a2),
986 : Min(ip_bits(a1), ip_bits(a2))) == 0);
987 : }
988 :
989 5488 : PG_RETURN_BOOL(false);
990 : }
991 :
992 : /*
993 : * Planner support function for network subset/superset operators
994 : */
995 : Datum
996 992 : network_subset_support(PG_FUNCTION_ARGS)
997 : {
998 992 : Node *rawreq = (Node *) PG_GETARG_POINTER(0);
999 992 : Node *ret = NULL;
1000 :
1001 992 : if (IsA(rawreq, SupportRequestIndexCondition))
1002 : {
1003 : /* Try to convert operator/function call to index conditions */
1004 32 : SupportRequestIndexCondition *req = (SupportRequestIndexCondition *) rawreq;
1005 :
1006 32 : if (is_opclause(req->node))
1007 : {
1008 32 : OpExpr *clause = (OpExpr *) req->node;
1009 :
1010 : Assert(list_length(clause->args) == 2);
1011 : ret = (Node *)
1012 32 : match_network_function((Node *) linitial(clause->args),
1013 32 : (Node *) lsecond(clause->args),
1014 : req->indexarg,
1015 : req->funcid,
1016 : req->opfamily);
1017 : }
1018 0 : else if (is_funcclause(req->node)) /* be paranoid */
1019 : {
1020 0 : FuncExpr *clause = (FuncExpr *) req->node;
1021 :
1022 : Assert(list_length(clause->args) == 2);
1023 : ret = (Node *)
1024 0 : match_network_function((Node *) linitial(clause->args),
1025 0 : (Node *) lsecond(clause->args),
1026 : req->indexarg,
1027 : req->funcid,
1028 : req->opfamily);
1029 : }
1030 : }
1031 :
1032 992 : PG_RETURN_POINTER(ret);
1033 : }
1034 :
1035 : /*
1036 : * match_network_function
1037 : * Try to generate an indexqual for a network subset/superset function.
1038 : *
1039 : * This layer is just concerned with identifying the function and swapping
1040 : * the arguments if necessary.
1041 : */
1042 : static List *
1043 32 : match_network_function(Node *leftop,
1044 : Node *rightop,
1045 : int indexarg,
1046 : Oid funcid,
1047 : Oid opfamily)
1048 : {
1049 32 : switch (funcid)
1050 : {
1051 8 : case F_NETWORK_SUB:
1052 : /* indexkey must be on the left */
1053 8 : if (indexarg != 0)
1054 0 : return NIL;
1055 8 : return match_network_subset(leftop, rightop, false, opfamily);
1056 :
1057 8 : case F_NETWORK_SUBEQ:
1058 : /* indexkey must be on the left */
1059 8 : if (indexarg != 0)
1060 0 : return NIL;
1061 8 : return match_network_subset(leftop, rightop, true, opfamily);
1062 :
1063 8 : case F_NETWORK_SUP:
1064 : /* indexkey must be on the right */
1065 8 : if (indexarg != 1)
1066 0 : return NIL;
1067 8 : return match_network_subset(rightop, leftop, false, opfamily);
1068 :
1069 8 : case F_NETWORK_SUPEQ:
1070 : /* indexkey must be on the right */
1071 8 : if (indexarg != 1)
1072 0 : return NIL;
1073 8 : return match_network_subset(rightop, leftop, true, opfamily);
1074 :
1075 0 : default:
1076 :
1077 : /*
1078 : * We'd only get here if somebody attached this support function
1079 : * to an unexpected function. Maybe we should complain, but for
1080 : * now, do nothing.
1081 : */
1082 0 : return NIL;
1083 : }
1084 : }
1085 :
1086 : /*
1087 : * match_network_subset
1088 : * Try to generate an indexqual for a network subset function.
1089 : */
1090 : static List *
1091 32 : match_network_subset(Node *leftop,
1092 : Node *rightop,
1093 : bool is_eq,
1094 : Oid opfamily)
1095 : {
1096 : List *result;
1097 : Datum rightopval;
1098 32 : Oid datatype = INETOID;
1099 : Oid opr1oid;
1100 : Oid opr2oid;
1101 : Datum opr1right;
1102 : Datum opr2right;
1103 : Expr *expr;
1104 :
1105 : /*
1106 : * Can't do anything with a non-constant or NULL comparison value.
1107 : *
1108 : * Note that since we restrict ourselves to cases with a hard constant on
1109 : * the RHS, it's a-fortiori a pseudoconstant, and we don't need to worry
1110 : * about verifying that.
1111 : */
1112 32 : if (!IsA(rightop, Const) ||
1113 32 : ((Const *) rightop)->constisnull)
1114 0 : return NIL;
1115 32 : rightopval = ((Const *) rightop)->constvalue;
1116 :
1117 : /*
1118 : * Must check that index's opfamily supports the operators we will want to
1119 : * apply.
1120 : *
1121 : * We insist on the opfamily being the specific one we expect, else we'd
1122 : * do the wrong thing if someone were to make a reverse-sort opfamily with
1123 : * the same operators.
1124 : */
1125 32 : if (opfamily != NETWORK_BTREE_FAM_OID)
1126 0 : return NIL;
1127 :
1128 : /*
1129 : * create clause "key >= network_scan_first( rightopval )", or ">" if the
1130 : * operator disallows equality.
1131 : *
1132 : * Note: seeing that this function supports only fixed values for opfamily
1133 : * and datatype, we could just hard-wire the operator OIDs instead of
1134 : * looking them up. But for now it seems better to be general.
1135 : */
1136 32 : if (is_eq)
1137 : {
1138 16 : opr1oid = get_opfamily_member(opfamily, datatype, datatype,
1139 : BTGreaterEqualStrategyNumber);
1140 16 : if (opr1oid == InvalidOid)
1141 0 : elog(ERROR, "no >= operator for opfamily %u", opfamily);
1142 : }
1143 : else
1144 : {
1145 16 : opr1oid = get_opfamily_member(opfamily, datatype, datatype,
1146 : BTGreaterStrategyNumber);
1147 16 : if (opr1oid == InvalidOid)
1148 0 : elog(ERROR, "no > operator for opfamily %u", opfamily);
1149 : }
1150 :
1151 32 : opr1right = network_scan_first(rightopval);
1152 :
1153 32 : expr = make_opclause(opr1oid, BOOLOID, false,
1154 : (Expr *) leftop,
1155 32 : (Expr *) makeConst(datatype, -1,
1156 : InvalidOid, /* not collatable */
1157 : -1, opr1right,
1158 : false, false),
1159 : InvalidOid, InvalidOid);
1160 32 : result = list_make1(expr);
1161 :
1162 : /* create clause "key <= network_scan_last( rightopval )" */
1163 :
1164 32 : opr2oid = get_opfamily_member(opfamily, datatype, datatype,
1165 : BTLessEqualStrategyNumber);
1166 32 : if (opr2oid == InvalidOid)
1167 0 : elog(ERROR, "no <= operator for opfamily %u", opfamily);
1168 :
1169 32 : opr2right = network_scan_last(rightopval);
1170 :
1171 32 : expr = make_opclause(opr2oid, BOOLOID, false,
1172 : (Expr *) leftop,
1173 32 : (Expr *) makeConst(datatype, -1,
1174 : InvalidOid, /* not collatable */
1175 : -1, opr2right,
1176 : false, false),
1177 : InvalidOid, InvalidOid);
1178 32 : result = lappend(result, expr);
1179 :
1180 32 : return result;
1181 : }
1182 :
1183 :
1184 : /*
1185 : * Extract data from a network datatype.
1186 : */
1187 : Datum
1188 68 : network_host(PG_FUNCTION_ARGS)
1189 : {
1190 68 : inet *ip = PG_GETARG_INET_PP(0);
1191 : char *ptr;
1192 : char tmp[sizeof("xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:255.255.255.255/128")];
1193 :
1194 : /* force display of max bits, regardless of masklen... */
1195 68 : if (pg_inet_net_ntop(ip_family(ip), ip_addr(ip), ip_maxbits(ip),
1196 : tmp, sizeof(tmp)) == NULL)
1197 0 : ereport(ERROR,
1198 : (errcode(ERRCODE_INVALID_BINARY_REPRESENTATION),
1199 : errmsg("could not format inet value: %m")));
1200 :
1201 : /* Suppress /n if present (shouldn't happen now) */
1202 68 : if ((ptr = strchr(tmp, '/')) != NULL)
1203 0 : *ptr = '\0';
1204 :
1205 68 : PG_RETURN_TEXT_P(cstring_to_text(tmp));
1206 : }
1207 :
1208 : /*
1209 : * network_show implements the inet and cidr casts to text. This is not
1210 : * quite the same behavior as network_out, hence we can't drop it in favor
1211 : * of CoerceViaIO.
1212 : */
1213 : Datum
1214 144 : network_show(PG_FUNCTION_ARGS)
1215 : {
1216 144 : inet *ip = PG_GETARG_INET_PP(0);
1217 : int len;
1218 : char tmp[sizeof("xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:255.255.255.255/128")];
1219 :
1220 144 : if (pg_inet_net_ntop(ip_family(ip), ip_addr(ip), ip_maxbits(ip),
1221 : tmp, sizeof(tmp)) == NULL)
1222 0 : ereport(ERROR,
1223 : (errcode(ERRCODE_INVALID_BINARY_REPRESENTATION),
1224 : errmsg("could not format inet value: %m")));
1225 :
1226 : /* Add /n if not present (which it won't be) */
1227 144 : if (strchr(tmp, '/') == NULL)
1228 : {
1229 144 : len = strlen(tmp);
1230 144 : snprintf(tmp + len, sizeof(tmp) - len, "/%u", ip_bits(ip));
1231 : }
1232 :
1233 144 : PG_RETURN_TEXT_P(cstring_to_text(tmp));
1234 : }
1235 :
1236 : Datum
1237 0 : inet_abbrev(PG_FUNCTION_ARGS)
1238 : {
1239 0 : inet *ip = PG_GETARG_INET_PP(0);
1240 : char *dst;
1241 : char tmp[sizeof("xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:255.255.255.255/128")];
1242 :
1243 0 : dst = pg_inet_net_ntop(ip_family(ip), ip_addr(ip),
1244 0 : ip_bits(ip), tmp, sizeof(tmp));
1245 :
1246 0 : if (dst == NULL)
1247 0 : ereport(ERROR,
1248 : (errcode(ERRCODE_INVALID_BINARY_REPRESENTATION),
1249 : errmsg("could not format inet value: %m")));
1250 :
1251 0 : PG_RETURN_TEXT_P(cstring_to_text(tmp));
1252 : }
1253 :
1254 : Datum
1255 0 : cidr_abbrev(PG_FUNCTION_ARGS)
1256 : {
1257 0 : inet *ip = PG_GETARG_INET_PP(0);
1258 : char *dst;
1259 : char tmp[sizeof("xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:255.255.255.255/128")];
1260 :
1261 0 : dst = pg_inet_cidr_ntop(ip_family(ip), ip_addr(ip),
1262 0 : ip_bits(ip), tmp, sizeof(tmp));
1263 :
1264 0 : if (dst == NULL)
1265 0 : ereport(ERROR,
1266 : (errcode(ERRCODE_INVALID_BINARY_REPRESENTATION),
1267 : errmsg("could not format cidr value: %m")));
1268 :
1269 0 : PG_RETURN_TEXT_P(cstring_to_text(tmp));
1270 : }
1271 :
1272 : Datum
1273 236 : network_masklen(PG_FUNCTION_ARGS)
1274 : {
1275 236 : inet *ip = PG_GETARG_INET_PP(0);
1276 :
1277 236 : PG_RETURN_INT32(ip_bits(ip));
1278 : }
1279 :
1280 : Datum
1281 68 : network_family(PG_FUNCTION_ARGS)
1282 : {
1283 68 : inet *ip = PG_GETARG_INET_PP(0);
1284 :
1285 68 : switch (ip_family(ip))
1286 : {
1287 56 : case PGSQL_AF_INET:
1288 56 : PG_RETURN_INT32(4);
1289 : break;
1290 12 : case PGSQL_AF_INET6:
1291 12 : PG_RETURN_INT32(6);
1292 : break;
1293 0 : default:
1294 0 : PG_RETURN_INT32(0);
1295 : break;
1296 : }
1297 : }
1298 :
1299 : Datum
1300 168 : network_broadcast(PG_FUNCTION_ARGS)
1301 : {
1302 168 : inet *ip = PG_GETARG_INET_PP(0);
1303 : inet *dst;
1304 : int byte;
1305 : int bits;
1306 : int maxbytes;
1307 : unsigned char mask;
1308 : unsigned char *a,
1309 : *b;
1310 :
1311 : /* make sure any unused bits are zeroed */
1312 168 : dst = (inet *) palloc0(sizeof(inet));
1313 :
1314 168 : maxbytes = ip_addrsize(ip);
1315 168 : bits = ip_bits(ip);
1316 168 : a = ip_addr(ip);
1317 168 : b = ip_addr(dst);
1318 :
1319 1128 : for (byte = 0; byte < maxbytes; byte++)
1320 : {
1321 960 : if (bits >= 8)
1322 : {
1323 660 : mask = 0x00;
1324 660 : bits -= 8;
1325 : }
1326 300 : else if (bits == 0)
1327 284 : mask = 0xff;
1328 : else
1329 : {
1330 16 : mask = 0xff >> bits;
1331 16 : bits = 0;
1332 : }
1333 :
1334 960 : b[byte] = a[byte] | mask;
1335 : }
1336 :
1337 168 : ip_family(dst) = ip_family(ip);
1338 168 : ip_bits(dst) = ip_bits(ip);
1339 168 : SET_INET_VARSIZE(dst);
1340 :
1341 168 : PG_RETURN_INET_P(dst);
1342 : }
1343 :
1344 : Datum
1345 168 : network_network(PG_FUNCTION_ARGS)
1346 : {
1347 168 : inet *ip = PG_GETARG_INET_PP(0);
1348 : inet *dst;
1349 : int byte;
1350 : int bits;
1351 : unsigned char mask;
1352 : unsigned char *a,
1353 : *b;
1354 :
1355 : /* make sure any unused bits are zeroed */
1356 168 : dst = (inet *) palloc0(sizeof(inet));
1357 :
1358 168 : bits = ip_bits(ip);
1359 168 : a = ip_addr(ip);
1360 168 : b = ip_addr(dst);
1361 :
1362 168 : byte = 0;
1363 :
1364 844 : while (bits)
1365 : {
1366 676 : if (bits >= 8)
1367 : {
1368 660 : mask = 0xff;
1369 660 : bits -= 8;
1370 : }
1371 : else
1372 : {
1373 16 : mask = 0xff << (8 - bits);
1374 16 : bits = 0;
1375 : }
1376 :
1377 676 : b[byte] = a[byte] & mask;
1378 676 : byte++;
1379 : }
1380 :
1381 168 : ip_family(dst) = ip_family(ip);
1382 168 : ip_bits(dst) = ip_bits(ip);
1383 168 : SET_INET_VARSIZE(dst);
1384 :
1385 168 : PG_RETURN_INET_P(dst);
1386 : }
1387 :
1388 : Datum
1389 0 : network_netmask(PG_FUNCTION_ARGS)
1390 : {
1391 0 : inet *ip = PG_GETARG_INET_PP(0);
1392 : inet *dst;
1393 : int byte;
1394 : int bits;
1395 : unsigned char mask;
1396 : unsigned char *b;
1397 :
1398 : /* make sure any unused bits are zeroed */
1399 0 : dst = (inet *) palloc0(sizeof(inet));
1400 :
1401 0 : bits = ip_bits(ip);
1402 0 : b = ip_addr(dst);
1403 :
1404 0 : byte = 0;
1405 :
1406 0 : while (bits)
1407 : {
1408 0 : if (bits >= 8)
1409 : {
1410 0 : mask = 0xff;
1411 0 : bits -= 8;
1412 : }
1413 : else
1414 : {
1415 0 : mask = 0xff << (8 - bits);
1416 0 : bits = 0;
1417 : }
1418 :
1419 0 : b[byte] = mask;
1420 0 : byte++;
1421 : }
1422 :
1423 0 : ip_family(dst) = ip_family(ip);
1424 0 : ip_bits(dst) = ip_maxbits(ip);
1425 0 : SET_INET_VARSIZE(dst);
1426 :
1427 0 : PG_RETURN_INET_P(dst);
1428 : }
1429 :
1430 : Datum
1431 0 : network_hostmask(PG_FUNCTION_ARGS)
1432 : {
1433 0 : inet *ip = PG_GETARG_INET_PP(0);
1434 : inet *dst;
1435 : int byte;
1436 : int bits;
1437 : int maxbytes;
1438 : unsigned char mask;
1439 : unsigned char *b;
1440 :
1441 : /* make sure any unused bits are zeroed */
1442 0 : dst = (inet *) palloc0(sizeof(inet));
1443 :
1444 0 : maxbytes = ip_addrsize(ip);
1445 0 : bits = ip_maxbits(ip) - ip_bits(ip);
1446 0 : b = ip_addr(dst);
1447 :
1448 0 : byte = maxbytes - 1;
1449 :
1450 0 : while (bits)
1451 : {
1452 0 : if (bits >= 8)
1453 : {
1454 0 : mask = 0xff;
1455 0 : bits -= 8;
1456 : }
1457 : else
1458 : {
1459 0 : mask = 0xff >> (8 - bits);
1460 0 : bits = 0;
1461 : }
1462 :
1463 0 : b[byte] = mask;
1464 0 : byte--;
1465 : }
1466 :
1467 0 : ip_family(dst) = ip_family(ip);
1468 0 : ip_bits(dst) = ip_maxbits(ip);
1469 0 : SET_INET_VARSIZE(dst);
1470 :
1471 0 : PG_RETURN_INET_P(dst);
1472 : }
1473 :
1474 : /*
1475 : * Returns true if the addresses are from the same family, or false. Used to
1476 : * check that we can create a network which contains both of the networks.
1477 : */
1478 : Datum
1479 144 : inet_same_family(PG_FUNCTION_ARGS)
1480 : {
1481 144 : inet *a1 = PG_GETARG_INET_PP(0);
1482 144 : inet *a2 = PG_GETARG_INET_PP(1);
1483 :
1484 144 : PG_RETURN_BOOL(ip_family(a1) == ip_family(a2));
1485 : }
1486 :
1487 : /*
1488 : * Returns the smallest CIDR which contains both of the inputs.
1489 : */
1490 : Datum
1491 140 : inet_merge(PG_FUNCTION_ARGS)
1492 : {
1493 140 : inet *a1 = PG_GETARG_INET_PP(0),
1494 140 : *a2 = PG_GETARG_INET_PP(1);
1495 : int commonbits;
1496 :
1497 140 : if (ip_family(a1) != ip_family(a2))
1498 4 : ereport(ERROR,
1499 : (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
1500 : errmsg("cannot merge addresses from different families")));
1501 :
1502 136 : commonbits = bitncommon(ip_addr(a1), ip_addr(a2),
1503 136 : Min(ip_bits(a1), ip_bits(a2)));
1504 :
1505 136 : PG_RETURN_INET_P(cidr_set_masklen_internal(a1, commonbits));
1506 : }
1507 :
1508 : /*
1509 : * Convert a value of a network datatype to an approximate scalar value.
1510 : * This is used for estimating selectivities of inequality operators
1511 : * involving network types.
1512 : *
1513 : * On failure (e.g., unsupported typid), set *failure to true;
1514 : * otherwise, that variable is not changed.
1515 : */
1516 : double
1517 10880 : convert_network_to_scalar(Datum value, Oid typid, bool *failure)
1518 : {
1519 10880 : switch (typid)
1520 : {
1521 10880 : case INETOID:
1522 : case CIDROID:
1523 : {
1524 10880 : inet *ip = DatumGetInetPP(value);
1525 : int len;
1526 : double res;
1527 : int i;
1528 :
1529 : /*
1530 : * Note that we don't use the full address for IPv6.
1531 : */
1532 10880 : if (ip_family(ip) == PGSQL_AF_INET)
1533 10880 : len = 4;
1534 : else
1535 0 : len = 5;
1536 :
1537 10880 : res = ip_family(ip);
1538 54400 : for (i = 0; i < len; i++)
1539 : {
1540 43520 : res *= 256;
1541 43520 : res += ip_addr(ip)[i];
1542 : }
1543 10880 : return res;
1544 : }
1545 0 : case MACADDROID:
1546 : {
1547 0 : macaddr *mac = DatumGetMacaddrP(value);
1548 : double res;
1549 :
1550 0 : res = (mac->a << 16) | (mac->b << 8) | (mac->c);
1551 0 : res *= 256 * 256 * 256;
1552 0 : res += (mac->d << 16) | (mac->e << 8) | (mac->f);
1553 0 : return res;
1554 : }
1555 0 : case MACADDR8OID:
1556 : {
1557 0 : macaddr8 *mac = DatumGetMacaddr8P(value);
1558 : double res;
1559 :
1560 0 : res = (mac->a << 24) | (mac->b << 16) | (mac->c << 8) | (mac->d);
1561 0 : res *= ((double) 256) * 256 * 256 * 256;
1562 0 : res += (mac->e << 24) | (mac->f << 16) | (mac->g << 8) | (mac->h);
1563 0 : return res;
1564 : }
1565 : }
1566 :
1567 0 : *failure = true;
1568 0 : return 0;
1569 : }
1570 :
1571 : /*
1572 : * int
1573 : * bitncmp(l, r, n)
1574 : * compare bit masks l and r, for n bits.
1575 : * return:
1576 : * <0, >0, or 0 in the libc tradition.
1577 : * note:
1578 : * network byte order assumed. this means 192.5.5.240/28 has
1579 : * 0x11110000 in its fourth octet.
1580 : * author:
1581 : * Paul Vixie (ISC), June 1996
1582 : */
1583 : int
1584 104902 : bitncmp(const unsigned char *l, const unsigned char *r, int n)
1585 : {
1586 : unsigned int lb,
1587 : rb;
1588 : int x,
1589 : b;
1590 :
1591 104902 : b = n / 8;
1592 104902 : x = memcmp(l, r, b);
1593 104902 : if (x || (n % 8) == 0)
1594 104742 : return x;
1595 :
1596 160 : lb = l[b];
1597 160 : rb = r[b];
1598 244 : for (b = n % 8; b > 0; b--)
1599 : {
1600 160 : if (IS_HIGHBIT_SET(lb) != IS_HIGHBIT_SET(rb))
1601 : {
1602 76 : if (IS_HIGHBIT_SET(lb))
1603 52 : return 1;
1604 24 : return -1;
1605 : }
1606 84 : lb <<= 1;
1607 84 : rb <<= 1;
1608 : }
1609 84 : return 0;
1610 : }
1611 :
1612 : /*
1613 : * bitncommon: compare bit masks l and r, for up to n bits.
1614 : *
1615 : * Returns the number of leading bits that match (0 to n).
1616 : */
1617 : int
1618 3228 : bitncommon(const unsigned char *l, const unsigned char *r, int n)
1619 : {
1620 : int byte,
1621 : nbits;
1622 :
1623 : /* number of bits to examine in last byte */
1624 3228 : nbits = n % 8;
1625 :
1626 : /* check whole bytes */
1627 3682 : for (byte = 0; byte < n / 8; byte++)
1628 : {
1629 490 : if (l[byte] != r[byte])
1630 : {
1631 : /* at least one bit in the last byte is not common */
1632 36 : nbits = 7;
1633 36 : break;
1634 : }
1635 : }
1636 :
1637 : /* check bits in last partial byte */
1638 3228 : if (nbits != 0)
1639 : {
1640 : /* calculate diff of first non-matching bytes */
1641 2524 : unsigned int diff = l[byte] ^ r[byte];
1642 :
1643 : /* compare the bits from the most to the least */
1644 2912 : while ((diff >> (8 - nbits)) != 0)
1645 388 : nbits--;
1646 : }
1647 :
1648 3228 : return (8 * byte) + nbits;
1649 : }
1650 :
1651 :
1652 : /*
1653 : * Verify a CIDR address is OK (doesn't have bits set past the masklen)
1654 : */
1655 : static bool
1656 706 : addressOK(unsigned char *a, int bits, int family)
1657 : {
1658 : int byte;
1659 : int nbits;
1660 : int maxbits;
1661 : int maxbytes;
1662 : unsigned char mask;
1663 :
1664 706 : if (family == PGSQL_AF_INET)
1665 : {
1666 558 : maxbits = 32;
1667 558 : maxbytes = 4;
1668 : }
1669 : else
1670 : {
1671 148 : maxbits = 128;
1672 148 : maxbytes = 16;
1673 : }
1674 : Assert(bits <= maxbits);
1675 :
1676 706 : if (bits == maxbits)
1677 244 : return true;
1678 :
1679 462 : byte = bits / 8;
1680 :
1681 462 : nbits = bits % 8;
1682 462 : mask = 0xff;
1683 462 : if (bits != 0)
1684 430 : mask >>= nbits;
1685 :
1686 1888 : while (byte < maxbytes)
1687 : {
1688 1438 : if ((a[byte] & mask) != 0)
1689 12 : return false;
1690 1426 : mask = 0xff;
1691 1426 : byte++;
1692 : }
1693 :
1694 450 : return true;
1695 : }
1696 :
1697 :
1698 : /*
1699 : * These functions are used by planner to generate indexscan limits
1700 : * for clauses a << b and a <<= b
1701 : */
1702 :
1703 : /* return the minimal value for an IP on a given network */
1704 : Datum
1705 32 : network_scan_first(Datum in)
1706 : {
1707 32 : return DirectFunctionCall1(network_network, in);
1708 : }
1709 :
1710 : /*
1711 : * return "last" IP on a given network. It's the broadcast address,
1712 : * however, masklen has to be set to its max bits, since
1713 : * 192.168.0.255/24 is considered less than 192.168.0.255/32
1714 : *
1715 : * inet_set_masklen() hacked to max out the masklength to 128 for IPv6
1716 : * and 32 for IPv4 when given '-1' as argument.
1717 : */
1718 : Datum
1719 32 : network_scan_last(Datum in)
1720 : {
1721 32 : return DirectFunctionCall2(inet_set_masklen,
1722 : DirectFunctionCall1(network_broadcast, in),
1723 : Int32GetDatum(-1));
1724 : }
1725 :
1726 :
1727 : /*
1728 : * IP address that the client is connecting from (NULL if Unix socket)
1729 : */
1730 : Datum
1731 0 : inet_client_addr(PG_FUNCTION_ARGS)
1732 : {
1733 0 : Port *port = MyProcPort;
1734 : char remote_host[NI_MAXHOST];
1735 : int ret;
1736 :
1737 0 : if (port == NULL)
1738 0 : PG_RETURN_NULL();
1739 :
1740 0 : switch (port->raddr.addr.ss_family)
1741 : {
1742 0 : case AF_INET:
1743 : #ifdef HAVE_IPV6
1744 : case AF_INET6:
1745 : #endif
1746 0 : break;
1747 0 : default:
1748 0 : PG_RETURN_NULL();
1749 : }
1750 :
1751 0 : remote_host[0] = '\0';
1752 :
1753 0 : ret = pg_getnameinfo_all(&port->raddr.addr, port->raddr.salen,
1754 : remote_host, sizeof(remote_host),
1755 : NULL, 0,
1756 : NI_NUMERICHOST | NI_NUMERICSERV);
1757 0 : if (ret != 0)
1758 0 : PG_RETURN_NULL();
1759 :
1760 0 : clean_ipv6_addr(port->raddr.addr.ss_family, remote_host);
1761 :
1762 0 : PG_RETURN_INET_P(network_in(remote_host, false));
1763 : }
1764 :
1765 :
1766 : /*
1767 : * port that the client is connecting from (NULL if Unix socket)
1768 : */
1769 : Datum
1770 0 : inet_client_port(PG_FUNCTION_ARGS)
1771 : {
1772 0 : Port *port = MyProcPort;
1773 : char remote_port[NI_MAXSERV];
1774 : int ret;
1775 :
1776 0 : if (port == NULL)
1777 0 : PG_RETURN_NULL();
1778 :
1779 0 : switch (port->raddr.addr.ss_family)
1780 : {
1781 0 : case AF_INET:
1782 : #ifdef HAVE_IPV6
1783 : case AF_INET6:
1784 : #endif
1785 0 : break;
1786 0 : default:
1787 0 : PG_RETURN_NULL();
1788 : }
1789 :
1790 0 : remote_port[0] = '\0';
1791 :
1792 0 : ret = pg_getnameinfo_all(&port->raddr.addr, port->raddr.salen,
1793 : NULL, 0,
1794 : remote_port, sizeof(remote_port),
1795 : NI_NUMERICHOST | NI_NUMERICSERV);
1796 0 : if (ret != 0)
1797 0 : PG_RETURN_NULL();
1798 :
1799 0 : PG_RETURN_DATUM(DirectFunctionCall1(int4in, CStringGetDatum(remote_port)));
1800 : }
1801 :
1802 :
1803 : /*
1804 : * IP address that the server accepted the connection on (NULL if Unix socket)
1805 : */
1806 : Datum
1807 0 : inet_server_addr(PG_FUNCTION_ARGS)
1808 : {
1809 0 : Port *port = MyProcPort;
1810 : char local_host[NI_MAXHOST];
1811 : int ret;
1812 :
1813 0 : if (port == NULL)
1814 0 : PG_RETURN_NULL();
1815 :
1816 0 : switch (port->laddr.addr.ss_family)
1817 : {
1818 0 : case AF_INET:
1819 : #ifdef HAVE_IPV6
1820 : case AF_INET6:
1821 : #endif
1822 0 : break;
1823 0 : default:
1824 0 : PG_RETURN_NULL();
1825 : }
1826 :
1827 0 : local_host[0] = '\0';
1828 :
1829 0 : ret = pg_getnameinfo_all(&port->laddr.addr, port->laddr.salen,
1830 : local_host, sizeof(local_host),
1831 : NULL, 0,
1832 : NI_NUMERICHOST | NI_NUMERICSERV);
1833 0 : if (ret != 0)
1834 0 : PG_RETURN_NULL();
1835 :
1836 0 : clean_ipv6_addr(port->laddr.addr.ss_family, local_host);
1837 :
1838 0 : PG_RETURN_INET_P(network_in(local_host, false));
1839 : }
1840 :
1841 :
1842 : /*
1843 : * port that the server accepted the connection on (NULL if Unix socket)
1844 : */
1845 : Datum
1846 0 : inet_server_port(PG_FUNCTION_ARGS)
1847 : {
1848 0 : Port *port = MyProcPort;
1849 : char local_port[NI_MAXSERV];
1850 : int ret;
1851 :
1852 0 : if (port == NULL)
1853 0 : PG_RETURN_NULL();
1854 :
1855 0 : switch (port->laddr.addr.ss_family)
1856 : {
1857 0 : case AF_INET:
1858 : #ifdef HAVE_IPV6
1859 : case AF_INET6:
1860 : #endif
1861 0 : break;
1862 0 : default:
1863 0 : PG_RETURN_NULL();
1864 : }
1865 :
1866 0 : local_port[0] = '\0';
1867 :
1868 0 : ret = pg_getnameinfo_all(&port->laddr.addr, port->laddr.salen,
1869 : NULL, 0,
1870 : local_port, sizeof(local_port),
1871 : NI_NUMERICHOST | NI_NUMERICSERV);
1872 0 : if (ret != 0)
1873 0 : PG_RETURN_NULL();
1874 :
1875 0 : PG_RETURN_DATUM(DirectFunctionCall1(int4in, CStringGetDatum(local_port)));
1876 : }
1877 :
1878 :
1879 : Datum
1880 68 : inetnot(PG_FUNCTION_ARGS)
1881 : {
1882 68 : inet *ip = PG_GETARG_INET_PP(0);
1883 : inet *dst;
1884 :
1885 68 : dst = (inet *) palloc0(sizeof(inet));
1886 :
1887 : {
1888 68 : int nb = ip_addrsize(ip);
1889 68 : unsigned char *pip = ip_addr(ip);
1890 68 : unsigned char *pdst = ip_addr(dst);
1891 :
1892 484 : while (nb-- > 0)
1893 416 : pdst[nb] = ~pip[nb];
1894 : }
1895 68 : ip_bits(dst) = ip_bits(ip);
1896 :
1897 68 : ip_family(dst) = ip_family(ip);
1898 68 : SET_INET_VARSIZE(dst);
1899 :
1900 68 : PG_RETURN_INET_P(dst);
1901 : }
1902 :
1903 :
1904 : Datum
1905 68 : inetand(PG_FUNCTION_ARGS)
1906 : {
1907 68 : inet *ip = PG_GETARG_INET_PP(0);
1908 68 : inet *ip2 = PG_GETARG_INET_PP(1);
1909 : inet *dst;
1910 :
1911 68 : dst = (inet *) palloc0(sizeof(inet));
1912 :
1913 68 : if (ip_family(ip) != ip_family(ip2))
1914 0 : ereport(ERROR,
1915 : (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
1916 : errmsg("cannot AND inet values of different sizes")));
1917 : else
1918 : {
1919 68 : int nb = ip_addrsize(ip);
1920 68 : unsigned char *pip = ip_addr(ip);
1921 68 : unsigned char *pip2 = ip_addr(ip2);
1922 68 : unsigned char *pdst = ip_addr(dst);
1923 :
1924 484 : while (nb-- > 0)
1925 416 : pdst[nb] = pip[nb] & pip2[nb];
1926 : }
1927 68 : ip_bits(dst) = Max(ip_bits(ip), ip_bits(ip2));
1928 :
1929 68 : ip_family(dst) = ip_family(ip);
1930 68 : SET_INET_VARSIZE(dst);
1931 :
1932 68 : PG_RETURN_INET_P(dst);
1933 : }
1934 :
1935 :
1936 : Datum
1937 68 : inetor(PG_FUNCTION_ARGS)
1938 : {
1939 68 : inet *ip = PG_GETARG_INET_PP(0);
1940 68 : inet *ip2 = PG_GETARG_INET_PP(1);
1941 : inet *dst;
1942 :
1943 68 : dst = (inet *) palloc0(sizeof(inet));
1944 :
1945 68 : if (ip_family(ip) != ip_family(ip2))
1946 0 : ereport(ERROR,
1947 : (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
1948 : errmsg("cannot OR inet values of different sizes")));
1949 : else
1950 : {
1951 68 : int nb = ip_addrsize(ip);
1952 68 : unsigned char *pip = ip_addr(ip);
1953 68 : unsigned char *pip2 = ip_addr(ip2);
1954 68 : unsigned char *pdst = ip_addr(dst);
1955 :
1956 484 : while (nb-- > 0)
1957 416 : pdst[nb] = pip[nb] | pip2[nb];
1958 : }
1959 68 : ip_bits(dst) = Max(ip_bits(ip), ip_bits(ip2));
1960 :
1961 68 : ip_family(dst) = ip_family(ip);
1962 68 : SET_INET_VARSIZE(dst);
1963 :
1964 68 : PG_RETURN_INET_P(dst);
1965 : }
1966 :
1967 :
1968 : static inet *
1969 1268 : internal_inetpl(inet *ip, int64 addend)
1970 : {
1971 : inet *dst;
1972 :
1973 1268 : dst = (inet *) palloc0(sizeof(inet));
1974 :
1975 : {
1976 1268 : int nb = ip_addrsize(ip);
1977 1268 : unsigned char *pip = ip_addr(ip);
1978 1268 : unsigned char *pdst = ip_addr(dst);
1979 1268 : int carry = 0;
1980 :
1981 9316 : while (nb-- > 0)
1982 : {
1983 8048 : carry = pip[nb] + (int) (addend & 0xFF) + carry;
1984 8048 : pdst[nb] = (unsigned char) (carry & 0xFF);
1985 8048 : carry >>= 8;
1986 :
1987 : /*
1988 : * We have to be careful about right-shifting addend because
1989 : * right-shift isn't portable for negative values, while simply
1990 : * dividing by 256 doesn't work (the standard rounding is in the
1991 : * wrong direction, besides which there may be machines out there
1992 : * that round the wrong way). So, explicitly clear the low-order
1993 : * byte to remove any doubt about the correct result of the
1994 : * division, and then divide rather than shift.
1995 : */
1996 8048 : addend &= ~((int64) 0xFF);
1997 8048 : addend /= 0x100;
1998 : }
1999 :
2000 : /*
2001 : * At this point we should have addend and carry both zero if original
2002 : * addend was >= 0, or addend -1 and carry 1 if original addend was <
2003 : * 0. Anything else means overflow.
2004 : */
2005 1268 : if (!((addend == 0 && carry == 0) ||
2006 84 : (addend == -1 && carry == 1)))
2007 8 : ereport(ERROR,
2008 : (errcode(ERRCODE_NUMERIC_VALUE_OUT_OF_RANGE),
2009 : errmsg("result is out of range")));
2010 : }
2011 :
2012 1260 : ip_bits(dst) = ip_bits(ip);
2013 1260 : ip_family(dst) = ip_family(ip);
2014 1260 : SET_INET_VARSIZE(dst);
2015 :
2016 1260 : return dst;
2017 : }
2018 :
2019 :
2020 : Datum
2021 1180 : inetpl(PG_FUNCTION_ARGS)
2022 : {
2023 1180 : inet *ip = PG_GETARG_INET_PP(0);
2024 1180 : int64 addend = PG_GETARG_INT64(1);
2025 :
2026 1180 : PG_RETURN_INET_P(internal_inetpl(ip, addend));
2027 : }
2028 :
2029 :
2030 : Datum
2031 88 : inetmi_int8(PG_FUNCTION_ARGS)
2032 : {
2033 88 : inet *ip = PG_GETARG_INET_PP(0);
2034 88 : int64 addend = PG_GETARG_INT64(1);
2035 :
2036 88 : PG_RETURN_INET_P(internal_inetpl(ip, -addend));
2037 : }
2038 :
2039 :
2040 : Datum
2041 96 : inetmi(PG_FUNCTION_ARGS)
2042 : {
2043 96 : inet *ip = PG_GETARG_INET_PP(0);
2044 96 : inet *ip2 = PG_GETARG_INET_PP(1);
2045 96 : int64 res = 0;
2046 :
2047 96 : if (ip_family(ip) != ip_family(ip2))
2048 0 : ereport(ERROR,
2049 : (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
2050 : errmsg("cannot subtract inet values of different sizes")));
2051 : else
2052 : {
2053 : /*
2054 : * We form the difference using the traditional complement, increment,
2055 : * and add rule, with the increment part being handled by starting the
2056 : * carry off at 1. If you don't think integer arithmetic is done in
2057 : * two's complement, too bad.
2058 : */
2059 96 : int nb = ip_addrsize(ip);
2060 96 : int byte = 0;
2061 96 : unsigned char *pip = ip_addr(ip);
2062 96 : unsigned char *pip2 = ip_addr(ip2);
2063 96 : int carry = 1;
2064 :
2065 848 : while (nb-- > 0)
2066 : {
2067 : int lobyte;
2068 :
2069 760 : carry = pip[nb] + (~pip2[nb] & 0xFF) + carry;
2070 760 : lobyte = carry & 0xFF;
2071 760 : if (byte < sizeof(int64))
2072 : {
2073 512 : res |= ((int64) lobyte) << (byte * 8);
2074 : }
2075 : else
2076 : {
2077 : /*
2078 : * Input wider than int64: check for overflow. All bytes to
2079 : * the left of what will fit should be 0 or 0xFF, depending on
2080 : * sign of the now-complete result.
2081 : */
2082 248 : if ((res < 0) ? (lobyte != 0xFF) : (lobyte != 0))
2083 8 : ereport(ERROR,
2084 : (errcode(ERRCODE_NUMERIC_VALUE_OUT_OF_RANGE),
2085 : errmsg("result is out of range")));
2086 : }
2087 752 : carry >>= 8;
2088 752 : byte++;
2089 : }
2090 :
2091 : /*
2092 : * If input is narrower than int64, overflow is not possible, but we
2093 : * have to do proper sign extension.
2094 : */
2095 88 : if (carry == 0 && byte < sizeof(int64))
2096 8 : res |= ((uint64) (int64) -1) << (byte * 8);
2097 : }
2098 :
2099 88 : PG_RETURN_INT64(res);
2100 : }
2101 :
2102 :
2103 : /*
2104 : * clean_ipv6_addr --- remove any '%zone' part from an IPv6 address string
2105 : *
2106 : * XXX This should go away someday!
2107 : *
2108 : * This is a kluge needed because we don't yet support zones in stored inet
2109 : * values. Since the result of getnameinfo() might include a zone spec,
2110 : * call this to remove it anywhere we want to feed getnameinfo's output to
2111 : * network_in. Beats failing entirely.
2112 : *
2113 : * An alternative approach would be to let network_in ignore %-parts for
2114 : * itself, but that would mean we'd silently drop zone specs in user input,
2115 : * which seems not such a good idea.
2116 : */
2117 : void
2118 36 : clean_ipv6_addr(int addr_family, char *addr)
2119 : {
2120 : #ifdef HAVE_IPV6
2121 36 : if (addr_family == AF_INET6)
2122 : {
2123 16 : char *pct = strchr(addr, '%');
2124 :
2125 16 : if (pct)
2126 0 : *pct = '\0';
2127 : }
2128 : #endif
2129 36 : }
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