Changes in wsrep_guess_ip()

* Changed loopback detection to be done via ifa->ifa_flags
* Removed unused function wsrep_guess_address()

Author: Nirbhay Choubey

mysql-test/suite/galera/suite.pm

@@ -24,8 +24,6 @@ return "No my_print_defaults" unless $epath;
 
 push @::global_suppressions,
   (
-     qr(WSREP: Failed to guess base node address),
-     qr(WSREP: Guessing address for incoming client connections failed),
      qr(WSREP: wsrep_sst_receive_address is set to '127.0.0.1),
      qr(WSREP: Could not open saved state file for reading: ),
      qr(WSREP: Gap in state sequence. Need state transfer.),

mysql-test/suite/wsrep/suite.pm

@@ -24,8 +24,6 @@ return "No my_print_defaults" unless $epath;
 
 push @::global_suppressions,
   (
-     qr(WSREP: Failed to guess base node address),
-     qr(WSREP: Guessing address for incoming client connections failed),
      qr(WSREP: Could not open saved state file for reading: ),
      qr(WSREP: option --wsrep-casual-reads is deprecated),
      qr(WSREP: --wsrep-casual-reads=ON takes precedence over --wsrep-sync-wait=0),

sql/wsrep_utils.cc

@@ -35,8 +35,9 @@
 #include <netdb.h>    // getaddrinfo()
 
 #ifdef HAVE_GETIFADDRS
+#include <net/if.h>
 #include <ifaddrs.h>
-#endif
+#endif /* HAVE_GETIFADDRS */
 
 extern char** environ; // environment variables
 
@@ -406,6 +407,13 @@ size_t wsrep_guess_ip (char* buf, size_t buf_len)
     return ip_len;
   }
 
+  /*
+    getifaddrs() is avaiable at least on Linux since glib 2.3, FreeBSD,
+    MAC OSX, OpenSolaris, Solaris.
+
+    On platforms which do not support getifaddrs() this function returns
+    a failure and user is prompted to do manual configuration.
+  */
 #if HAVE_GETIFADDRS
   struct ifaddrs *ifaddr, *ifa;
   if (getifaddrs(&ifaddr) == 0)
@@ -415,34 +423,23 @@ size_t wsrep_guess_ip (char* buf, size_t buf_len)
       if (!ifa->ifa_addr || ifa->ifa_addr->sa_family != AF_INET) // TODO AF_INET6
         continue;
 
-      if (vio_getnameinfo(ifa->ifa_addr, buf, buf_len, NULL, 0, NI_NUMERICHOST))
+      // Skip loopback interfaces (like lo:127.0.0.1)
+      if (ifa->ifa_flags & IFF_LOOPBACK)
         continue;
 
-      if (strcmp(buf, "127.0.0.1") == 0) // lame
+      if (vio_getnameinfo(ifa->ifa_addr, buf, buf_len, NULL, 0, NI_NUMERICHOST))
         continue;
 
       freeifaddrs(ifaddr);
       return strlen(buf);
     }
     freeifaddrs(ifaddr);
   }
-#endif
+#endif /* HAVE_GETIFADDRS */
 
   return 0;
 }
 
-size_t wsrep_guess_address(char* buf, size_t buf_len)
-{
-  size_t addr_len = wsrep_guess_ip (buf, buf_len);
-
-  if (addr_len && addr_len < buf_len) {
-    addr_len += snprintf (buf + addr_len, buf_len - addr_len,
-                          ":%u", mysqld_port);
-  }
-
-  return addr_len;
-}
-
 /*
  * WSREPXid
  */

sql/wsrep_utils.h

@@ -20,7 +20,6 @@
 
 unsigned int wsrep_check_ip (const char* addr);
 size_t wsrep_guess_ip (char* buf, size_t buf_len);
-size_t wsrep_guess_address(char* buf, size_t buf_len);
 
 namespace wsp {
 class node_status