[tor-commits] [tor/maint-0.4.5] Remove unused addr_port_set code

[dgoulet at torproject.org]

commit 627e7d6625997da33b7e00ef33f71db8a8a20cdc
Author: David Goulet <dgoulet at torproject.org>
Date:   Mon Feb 1 12:28:29 2021 -0500

    Remove unused addr_port_set code
    
    Signed-off-by: David Goulet <dgoulet at torproject.org>
---
 src/core/or/address_set.c | 75 -----------------------------------------------
 src/core/or/address_set.h | 15 ----------
 2 files changed, 90 deletions(-)

diff --git a/src/core/or/address_set.c b/src/core/or/address_set.c
index fcddc55e9f..9bd3cc0f2d 100644
--- a/src/core/or/address_set.c
+++ b/src/core/or/address_set.c
@@ -15,7 +15,6 @@
 #include "lib/net/address.h"
 #include "lib/container/bloomfilt.h"
 #include "lib/crypt_ops/crypto_rand.h"
-#include "siphash.h"
 
 /** Wrap our hash function to have the signature that the bloom filter
  * needs. */
@@ -69,77 +68,3 @@ address_set_probably_contains(const address_set_t *set,
 {
   return bloomfilt_probably_contains(set, addr);
 }
-
-/* Length of the item is an address (IPv4 or IPv6) and a 2 byte port. We use
- * 16 bytes for the address here (IPv6) since we do not know which family
- * the given address in the item thus in the case of IPv4, the extra bytes
- * are simply zeroes to accomodate. */
-#define BLOOMFILT_ADDR_PORT_ITEM_LEN (16 + sizeof(uint16_t))
-
-/** Build an item for the bloomfilter consisting of an address and port pair.
- *
- * If the given address is _not_ AF_INET or AF_INET6, then the item is an
- * array of 0s.
- *
- * Return a pointer to a static buffer containing the item. Next call to this
- * function invalidates its previous content. */
-static const uint8_t *
-build_addr_port_item(const tor_addr_t *addr, const uint16_t port)
-{
-  static uint8_t data[BLOOMFILT_ADDR_PORT_ITEM_LEN];
-
-  memset(data, 0, sizeof(data));
-  switch (tor_addr_family(addr)) {
-  case AF_INET:
-    memcpy(data, &addr->addr.in_addr.s_addr, 4);
-    break;
-  case AF_INET6:
-    memcpy(data, &addr->addr.in6_addr.s6_addr, 16);
-    break;
-  case AF_UNSPEC:
-    /* Leave the 0. */
-    break;
-  default:
-    /* LCOV_EXCL_START */
-    tor_fragile_assert();
-    /* LCOV_EXCL_STOP */
-  }
-
-  memcpy(data + 16, &port, sizeof(port));
-  return data;
-}
-
-/** Return a hash value for the given item that the bloomfilter will use. */
-static uint64_t
-bloomfilt_addr_port_hash(const struct sipkey *key,
-                         const void *item)
-{
-  return siphash24(item, BLOOMFILT_ADDR_PORT_ITEM_LEN, key);
-}
-
-/** Allocate and return an addr_port_set_t, suitable for holding up to
- * max_address_guess distinct values. */
-addr_port_set_t *
-addr_port_set_new(int max_addresses_guess)
-{
-  uint8_t k[BLOOMFILT_KEY_LEN];
-  crypto_rand((void*)k, sizeof(k));
-  return bloomfilt_new(max_addresses_guess, bloomfilt_addr_port_hash, k);
-}
-
-/** Add an address and port pair to the given set. */
-void
-addr_port_set_add(addr_port_set_t *set, const tor_addr_t *addr, uint16_t port)
-{
-  bloomfilt_add(set, build_addr_port_item(addr, port));
-}
-
-/** Return true if the given address and port pair are in the set. Of course,
- * this is a bloomfilter and thus in rare occasion, a false positive happens
- * thus the "probably". */
-bool
-addr_port_set_probably_contains(const addr_port_set_t *set,
-                                const tor_addr_t *addr, uint16_t port)
-{
-  return !!bloomfilt_probably_contains(set, build_addr_port_item(addr, port));
-}
diff --git a/src/core/or/address_set.h b/src/core/or/address_set.h
index 2c78ab0576..b4d94b65a9 100644
--- a/src/core/or/address_set.h
+++ b/src/core/or/address_set.h
@@ -29,19 +29,4 @@ void address_set_add_ipv4h(address_set_t *set, uint32_t addr);
 int address_set_probably_contains(const address_set_t *set,
                                   const struct tor_addr_t *addr);
 
-/**
- * An addr_port_set_t represents a set of tor_addr_t values with a uint16_t
- * port value. The implementation is probabilistic: false negatives cannot
- * occur but false positives are possible.
- */
-typedef struct bloomfilt_t addr_port_set_t;
-
-addr_port_set_t *addr_port_set_new(int max_addresses_guess);
-#define addr_port_set_free(s) bloomfilt_free(s)
-void addr_port_set_add(addr_port_set_t *set,
-                       const struct tor_addr_t *addr, uint16_t port);
-bool addr_port_set_probably_contains(const addr_port_set_t *set,
-                                     const struct tor_addr_t *addr,
-                                     uint16_t port);
-
 #endif /* !defined(TOR_ADDRESS_SET_H) */