[PATCH] qemu: fix well-formed migration URI formatting

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When adding an automatically allocated port to a well-formed migration
URI, keep it well-formed:

  tcp://1.2.3.4/  ->  tcp://1.2.3.4/:12345   # wrong
  tcp://1.2.3.4/  ->  tcp://1.2.3.4:12345/   # fixed
  tcp://1.2.3.4   ->  tcp://1.2.3.4:12345    # still works
  tcp:1.2.3.4     ->  tcp:1.2.3.4:12345      # still works (old syntax)

Signed-off-by: Michael Chapman <mike@xxxxxxxxxxxxxxxxx>
---
 src/qemu/qemu_migration.c | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

diff --git a/src/qemu/qemu_migration.c b/src/qemu/qemu_migration.c
index 0439ba4..cb59620 100644
--- a/src/qemu/qemu_migration.c
+++ b/src/qemu/qemu_migration.c
@@ -2535,6 +2535,7 @@ qemuMigrationPrepareDirect(virQEMUDriverPtr driver,
     char *uri_str = NULL;
     int ret = -1;
     virURIPtr uri = NULL;
+    bool well_formed_uri = true;
 
     VIR_DEBUG("driver=%p, dconn=%p, cookiein=%s, cookieinlen=%d, "
               "cookieout=%p, cookieoutlen=%p, uri_in=%s, uri_out=%p, "
@@ -2597,6 +2598,7 @@ qemuMigrationPrepareDirect(virQEMUDriverPtr driver,
 
         /* Convert uri_in to well-formed URI with // after tcp: */
         if (!(STRPREFIX(uri_in, "tcp://"))) {
+            well_formed_uri = false;
             if (virAsprintf(&uri_str, "tcp://%s", p) < 0)
                 goto cleanup;
         }
@@ -2626,9 +2628,17 @@ qemuMigrationPrepareDirect(virQEMUDriverPtr driver,
                 goto cleanup;
             }
 
-            /* Caller frees */
-            if (virAsprintf(uri_out, "%s:%d", uri_in, port) < 0)
-                goto cleanup;
+            if (well_formed_uri) {
+                uri->port = port;
+
+                /* Caller frees */
+                if (!(*uri_out = virURIFormat(uri)))
+                    goto cleanup;
+            } else {
+                /* Caller frees */
+                if (virAsprintf(uri_out, "%s:%d", uri_in, port) < 0)
+                    goto cleanup;
+            }
 
         } else {
             port = uri->port;
-- 
1.8.3.1

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