Minor changes to PR #2813.

* Function to test for slave handshake renamed slaveIsInHandshakeState.
* Function no longer accepts arguments since it always tests the
  same global state.
* Test for state translated to a range test since defines are guaranteed
  to stay in order in the future.
* Use the new function in the ROLE command implementation as well.

src/replication.c

@@ -41,7 +41,6 @@ void replicationDiscardCachedMaster(void);
 void replicationResurrectCachedMaster(int newfd);
 void replicationSendAck(void);
 void putSlaveOnline(redisClient *slave);
-int serverInHandshakeState(int repl_state);
 
 /* --------------------------- Utility functions ---------------------------- */
 
@@ -910,6 +909,13 @@ void updateSlavesWaitingBgsave(int bgsaveerr, int type) {
 
 /* ----------------------------------- SLAVE -------------------------------- */
 
+/* Returns 1 if the given replication state is a handshake state,
+ * 0 otherwise. */
+int slaveIsInHandshakeState(void) {
+    return server.repl_state >= REDIS_REPL_RECEIVE_PONG &&
+           server.repl_state <= REDIS_REPL_RECEIVE_PSYNC;
+}
+
 /* Abort the async download of the bulk dataset while SYNC-ing with master */
 void replicationAbortSyncTransfer(void) {
     redisAssert(server.repl_state == REDIS_REPL_TRANSFER);
@@ -1628,7 +1634,7 @@ void undoConnectWithMaster(void) {
     int fd = server.repl_transfer_s;
 
     redisAssert(server.repl_state == REDIS_REPL_CONNECTING ||
-                serverInHandshakeState(server.repl_state));
+                slaveIsInHandshakeState());
     aeDeleteFileEvent(server.el,fd,AE_READABLE|AE_WRITABLE);
     close(fd);
     server.repl_transfer_s = -1;
@@ -1647,7 +1653,7 @@ int cancelReplicationHandshake(void) {
     if (server.repl_state == REDIS_REPL_TRANSFER) {
         replicationAbortSyncTransfer();
     } else if (server.repl_state == REDIS_REPL_CONNECTING ||
-             serverInHandshakeState(server.repl_state))
+               slaveIsInHandshakeState())
     {
         undoConnectWithMaster();
     } else {
@@ -1782,42 +1788,23 @@ void roleCommand(redisClient *c) {
         addReplyBulkCBuffer(c,"slave",5);
         addReplyBulkCString(c,server.masterhost);
         addReplyLongLong(c,server.masterport);
+        if (slaveIsInHandshakeState()) {
+            slavestate = "handshake";
+        } else {
             switch(server.repl_state) {
             case REDIS_REPL_NONE: slavestate = "none"; break;
             case REDIS_REPL_CONNECT: slavestate = "connect"; break;
             case REDIS_REPL_CONNECTING: slavestate = "connecting"; break;
-        case REDIS_REPL_RECEIVE_PONG:
-        case REDIS_REPL_SEND_AUTH:
-        case REDIS_REPL_RECEIVE_AUTH:
-        case REDIS_REPL_SEND_PORT:
-        case REDIS_REPL_RECEIVE_PORT:
-        case REDIS_REPL_SEND_CAPA:
-        case REDIS_REPL_RECEIVE_CAPA:
-        case REDIS_REPL_SEND_PSYNC:
-        case REDIS_REPL_RECEIVE_PSYNC: slavestate = "handshake"; break;
             case REDIS_REPL_TRANSFER: slavestate = "sync"; break;
             case REDIS_REPL_CONNECTED: slavestate = "connected"; break;
             default: slavestate = "unknown"; break;
             }
+        }
         addReplyBulkCString(c,slavestate);
         addReplyLongLong(c,server.master ? server.master->reploff : -1);
     }
 }
 
-/* Returns 1 if the given replication state is a handshake state,
- * 0 otherwise. */
-int serverInHandshakeState(int repl_state) {
-    return repl_state == REDIS_REPL_RECEIVE_PONG ||
-           repl_state == REDIS_REPL_SEND_AUTH ||
-           repl_state == REDIS_REPL_RECEIVE_AUTH ||
-           repl_state == REDIS_REPL_SEND_PORT ||
-           repl_state == REDIS_REPL_RECEIVE_PORT ||
-           repl_state == REDIS_REPL_SEND_CAPA ||
-           repl_state == REDIS_REPL_RECEIVE_CAPA ||
-           repl_state == REDIS_REPL_SEND_PSYNC ||
-           repl_state == REDIS_REPL_RECEIVE_PSYNC;
-}
-
 /* Send a REPLCONF ACK command to the master to inform it about the current
  * processed offset. If we are not connected with a master, the command has
  * no effects. */
@@ -2202,7 +2189,7 @@ void replicationCron(void) {
     /* Non blocking connection timeout? */
     if (server.masterhost &&
         (server.repl_state == REDIS_REPL_CONNECTING ||
-         serverInHandshakeState(server.repl_state)) &&
+         slaveIsInHandshakeState()) &&
          (time(NULL)-server.repl_transfer_lastio) > server.repl_timeout)
     {
         redisLog(REDIS_WARNING,"Timeout connecting to the MASTER...");