save one round trip (version swapping) for daemon.

[rsync/rsync.git] / compat.c

diff --git a/compat.c b/compat.c
index 8401021..f53c433 100644 (file)
--- a/compat.c
+++ b/compat.c
@@ -40,35 +40,37 @@ extern int verbose;
 
 void setup_protocol(int f_out,int f_in)
 {
-  if (am_server) {
-    remote_version = read_int(f_in);
-    write_int(f_out,PROTOCOL_VERSION);
-    write_flush(f_out);
-  } else {
-    write_int(f_out,PROTOCOL_VERSION);
-    write_flush(f_out);
-    remote_version = read_int(f_in);
-  }
+       if (remote_version == 0) {
+               if (am_server) {
+                       remote_version = read_int(f_in);
+                       write_int(f_out,PROTOCOL_VERSION);
+                       write_flush(f_out);
+               } else {
+                       write_int(f_out,PROTOCOL_VERSION);
+                       write_flush(f_out);
+                       remote_version = read_int(f_in);
+               }
+       }
 
-  if (remote_version < MIN_PROTOCOL_VERSION ||
-      remote_version > MAX_PROTOCOL_VERSION) {
-    rprintf(FERROR,"protocol version mismatch - is your shell clean?\n");
-    exit_cleanup(1);
-  }    
-
-  if (verbose > 2)
-         rprintf(FINFO, "local_version=%d remote_version=%d\n",
-                 PROTOCOL_VERSION, remote_version);
-
-  if (remote_version >= 12) {
-    if (am_server) {
-      checksum_seed = time(NULL);
-      write_int(f_out,checksum_seed);
-    } else {
-      checksum_seed = read_int(f_in);
-    }
-  }
-
-  checksum_init();
+       if (remote_version < MIN_PROTOCOL_VERSION ||
+           remote_version > MAX_PROTOCOL_VERSION) {
+               rprintf(FERROR,"protocol version mismatch - is your shell clean?\n");
+               exit_cleanup(1);
+       }       
+       
+       if (verbose > 2)
+               rprintf(FINFO, "local_version=%d remote_version=%d\n",
+                       PROTOCOL_VERSION, remote_version);
+       
+       if (remote_version >= 12) {
+               if (am_server) {
+                       checksum_seed = time(NULL);
+                       write_int(f_out,checksum_seed);
+               } else {
+                       checksum_seed = read_int(f_in);
+               }
+       }
+       
+       checksum_init();
 }