Change "reverse_lookup_name" functions to refer to "PTR_name"s

Under the new convention, having a tor_addr.*lookup function that
doesn't do hostname resolution is too close for comfort.

I used this script here, and have made no other changes.

  s/tor_addr_parse_reverse_lookup_name/tor_addr_parse_PTR_name/g;
  s/tor_addr_to_reverse_lookup_name/tor_addr_to_PTR_name/g;

src/common/address.c

@@ -384,7 +384,7 @@ tor_addr_to_str(char *dest, const tor_addr_t *addr, size_t len, int decorate)
  * IPv4 or IPv6 address too.
  */
 int
-tor_addr_parse_reverse_lookup_name(tor_addr_t *result, const char *address,
+tor_addr_parse_PTR_name(tor_addr_t *result, const char *address,
                                    int family, int accept_regular)
 {
   if (!strcasecmpend(address, ".in-addr.arpa")) {
@@ -474,7 +474,7 @@ tor_addr_parse_reverse_lookup_name(tor_addr_t *result, const char *address,
  * the result in the <b>outlen</b>-byte buffer at <b>out</b>.  Return 0 on
  * success, -1 on failure. */
 int
-tor_addr_to_reverse_lookup_name(char *out, size_t outlen,
+tor_addr_to_PTR_name(char *out, size_t outlen,
                                 const tor_addr_t *addr)
 {
   if (addr->family == AF_INET) {

src/common/address.h

@@ -154,9 +154,9 @@ int tor_addr_is_internal(const tor_addr_t *ip, int for_listening) ATTR_PURE;
 /** Longest length that can be required for a reverse lookup name. */
 /* 32 nybbles, 32 dots, 8 characters of "ip6.arpa", 1 NUL: 73 characters. */
 #define REVERSE_LOOKUP_NAME_BUF_LEN 73
-int tor_addr_to_reverse_lookup_name(char *out, size_t outlen,
+int tor_addr_to_PTR_name(char *out, size_t outlen,
                                     const tor_addr_t *addr);
-int tor_addr_parse_reverse_lookup_name(tor_addr_t *result, const char *address,
+int tor_addr_parse_PTR_name(tor_addr_t *result, const char *address,
                                        int family, int accept_regular);
 
 int tor_addr_port_lookup(const char *s, tor_addr_t *addr_out,

src/or/connection_edge.c

@@ -1766,7 +1766,7 @@ connection_ap_handshake_rewrite_and_attach(entry_connection_t *conn,
       /* Don't let people try to do a reverse lookup on 10.0.0.1. */
       tor_addr_t addr;
       int ok;
-      ok = tor_addr_parse_reverse_lookup_name(
+      ok = tor_addr_parse_PTR_name(
                                &addr, socks->address, AF_UNSPEC, 1);
       if (ok == 1 && tor_addr_is_internal(&addr, 0)) {
         connection_ap_handshake_socks_resolved(conn, RESOLVED_TYPE_ERROR,
@@ -2530,7 +2530,7 @@ connection_ap_handshake_send_resolve(entry_connection_t *ap_conn)
 
     /* We're doing a reverse lookup.  The input could be an IP address, or
      * could be an .in-addr.arpa or .ip6.arpa address */
-    r = tor_addr_parse_reverse_lookup_name(&addr, a, AF_INET, 1);
+    r = tor_addr_parse_PTR_name(&addr, a, AF_INET, 1);
     if (r <= 0) {
       log_warn(LD_APP, "Rejecting ill-formed reverse lookup of %s",
                safe_str_client(a));
@@ -2538,7 +2538,7 @@ connection_ap_handshake_send_resolve(entry_connection_t *ap_conn)
       return -1;
     }
 
-    r = tor_addr_to_reverse_lookup_name(inaddr_buf, sizeof(inaddr_buf), &addr);
+    r = tor_addr_to_PTR_name(inaddr_buf, sizeof(inaddr_buf), &addr);
     if (r < 0) {
       log_warn(LD_BUG, "Couldn't generate reverse lookup hostname of %s",
                safe_str_client(a));

src/or/dns.c

@@ -721,7 +721,7 @@ dns_resolve_impl(edge_connection_t *exitconn, int is_resolve,
    * .in-addr.arpa address but this isn't a resolve request, kill the
    * connection.
    */
-  if ((r = tor_addr_parse_reverse_lookup_name(&addr, exitconn->_base.address,
+  if ((r = tor_addr_parse_PTR_name(&addr, exitconn->_base.address,
                                               AF_UNSPEC, 0)) != 0) {
     if (r == 1) {
       is_reverse = 1;
@@ -1404,7 +1404,7 @@ launch_resolve(edge_connection_t *exitconn)
     }
   }
 
-  r = tor_addr_parse_reverse_lookup_name(
+  r = tor_addr_parse_PTR_name(
                             &a, exitconn->_base.address, AF_UNSPEC, 0);
 
   tor_assert(the_evdns_base);

src/test/test_addr.c

@@ -371,25 +371,25 @@ test_addr_ip6_helpers(void)
   p1 = tor_addr_to_str(buf, &t1, sizeof(buf), 1);
   test_streq(p1, "18.0.0.1");
 
-  /* Test tor_addr_parse_reverse_lookup_name */
-  i = tor_addr_parse_reverse_lookup_name(&t1, "Foobar.baz", AF_UNSPEC, 0);
+  /* Test tor_addr_parse_PTR_name */
+  i = tor_addr_parse_PTR_name(&t1, "Foobar.baz", AF_UNSPEC, 0);
   test_eq(0, i);
-  i = tor_addr_parse_reverse_lookup_name(&t1, "Foobar.baz", AF_UNSPEC, 1);
+  i = tor_addr_parse_PTR_name(&t1, "Foobar.baz", AF_UNSPEC, 1);
   test_eq(0, i);
-  i = tor_addr_parse_reverse_lookup_name(&t1, "1.0.168.192.in-addr.arpa",
+  i = tor_addr_parse_PTR_name(&t1, "1.0.168.192.in-addr.arpa",
                                          AF_UNSPEC, 1);
   test_eq(1, i);
   test_eq(tor_addr_family(&t1), AF_INET);
   p1 = tor_addr_to_str(buf, &t1, sizeof(buf), 1);
   test_streq(p1, "192.168.0.1");
-  i = tor_addr_parse_reverse_lookup_name(&t1, "192.168.0.99", AF_UNSPEC, 0);
+  i = tor_addr_parse_PTR_name(&t1, "192.168.0.99", AF_UNSPEC, 0);
   test_eq(0, i);
-  i = tor_addr_parse_reverse_lookup_name(&t1, "192.168.0.99", AF_UNSPEC, 1);
+  i = tor_addr_parse_PTR_name(&t1, "192.168.0.99", AF_UNSPEC, 1);
   test_eq(1, i);
   p1 = tor_addr_to_str(buf, &t1, sizeof(buf), 1);
   test_streq(p1, "192.168.0.99");
   memset(&t1, 0, sizeof(t1));
-  i = tor_addr_parse_reverse_lookup_name(&t1,
+  i = tor_addr_parse_PTR_name(&t1,
                                          "0.1.2.3.4.5.6.7.8.9.a.b.c.d.e.f."
                                          "f.e.e.b.1.e.b.e.e.f.f.e.e.e.d.9."
                                          "ip6.ARPA",
@@ -398,37 +398,37 @@ test_addr_ip6_helpers(void)
   p1 = tor_addr_to_str(buf, &t1, sizeof(buf), 1);
   test_streq(p1, "[9dee:effe:ebe1:beef:fedc:ba98:7654:3210]");
   /* Failing cases. */
-  i = tor_addr_parse_reverse_lookup_name(&t1,
+  i = tor_addr_parse_PTR_name(&t1,
                                          "6.7.8.9.a.b.c.d.e.f."
                                          "f.e.e.b.1.e.b.e.e.f.f.e.e.e.d.9."
                                          "ip6.ARPA",
                                          AF_UNSPEC, 0);
   test_eq(i, -1);
-  i = tor_addr_parse_reverse_lookup_name(&t1,
+  i = tor_addr_parse_PTR_name(&t1,
                                          "6.7.8.9.a.b.c.d.e.f.a.b.c.d.e.f.0."
                                          "f.e.e.b.1.e.b.e.e.f.f.e.e.e.d.9."
                                          "ip6.ARPA",
                                          AF_UNSPEC, 0);
   test_eq(i, -1);
-  i = tor_addr_parse_reverse_lookup_name(&t1,
+  i = tor_addr_parse_PTR_name(&t1,
                                          "6.7.8.9.a.b.c.d.e.f.X.0.0.0.0.9."
                                          "f.e.e.b.1.e.b.e.e.f.f.e.e.e.d.9."
                                          "ip6.ARPA",
                                          AF_UNSPEC, 0);
   test_eq(i, -1);
-  i = tor_addr_parse_reverse_lookup_name(&t1, "32.1.1.in-addr.arpa",
+  i = tor_addr_parse_PTR_name(&t1, "32.1.1.in-addr.arpa",
                                          AF_UNSPEC, 0);
   test_eq(i, -1);
-  i = tor_addr_parse_reverse_lookup_name(&t1, ".in-addr.arpa",
+  i = tor_addr_parse_PTR_name(&t1, ".in-addr.arpa",
                                          AF_UNSPEC, 0);
   test_eq(i, -1);
-  i = tor_addr_parse_reverse_lookup_name(&t1, "1.2.3.4.5.in-addr.arpa",
+  i = tor_addr_parse_PTR_name(&t1, "1.2.3.4.5.in-addr.arpa",
                                          AF_UNSPEC, 0);
   test_eq(i, -1);
-  i = tor_addr_parse_reverse_lookup_name(&t1, "1.2.3.4.5.in-addr.arpa",
+  i = tor_addr_parse_PTR_name(&t1, "1.2.3.4.5.in-addr.arpa",
                                          AF_INET6, 0);
   test_eq(i, -1);
-  i = tor_addr_parse_reverse_lookup_name(&t1,
+  i = tor_addr_parse_PTR_name(&t1,
                                          "6.7.8.9.a.b.c.d.e.f.a.b.c.d.e.0."
                                          "f.e.e.b.1.e.b.e.e.f.f.e.e.e.d.9."
                                          "ip6.ARPA",