[PATCH] domain_conf: fix graphics parsing

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Commit dc98a5bc refactored the code a lot and forget about checking if
listen attribute is specified.  This ensures that listen attribute and
first listen element are compared only if both exist.

Signed-off-by: Pavel Hrdina <phrdina@xxxxxxxxxx>
---
 src/conf/domain_conf.c                             |  3 +-
 .../qemuxml2argv-graphics-vnc-no-listen-attr.args  | 22 ++++++++++++
 .../qemuxml2argv-graphics-vnc-no-listen-attr.xml   | 36 +++++++++++++++++++
 tests/qemuxml2argvtest.c                           |  1 +
 .../qemuxml2xmlout-graphics-vnc-no-listen-attr.xml | 41 ++++++++++++++++++++++
 tests/qemuxml2xmltest.c                            |  1 +
 6 files changed, 103 insertions(+), 1 deletion(-)
 create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-graphics-vnc-no-listen-attr.args
 create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-graphics-vnc-no-listen-attr.xml
 create mode 100644 tests/qemuxml2xmloutdata/qemuxml2xmlout-graphics-vnc-no-listen-attr.xml

diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
index 9e547b4..d2cf8d5 100644
--- a/src/conf/domain_conf.c
+++ b/src/conf/domain_conf.c
@@ -10741,7 +10741,8 @@ virDomainGraphicsListensParseXML(virDomainGraphicsDefPtr def,
     if (STREQ_NULLABLE(listenAddr, ""))
         VIR_FREE(listenAddr);
 
-    if (address && STRNEQ_NULLABLE(address->address, listenAddr)) {
+    if (address && listenAddr &&
+        STRNEQ_NULLABLE(address->address, listenAddr)) {
         virReportError(VIR_ERR_XML_ERROR,
                        _("graphics listen attribute %s must match address "
                          "attribute of first listen element (found %s)"),
diff --git a/tests/qemuxml2argvdata/qemuxml2argv-graphics-vnc-no-listen-attr.args b/tests/qemuxml2argvdata/qemuxml2argv-graphics-vnc-no-listen-attr.args
new file mode 100644
index 0000000..f374cff
--- /dev/null
+++ b/tests/qemuxml2argvdata/qemuxml2argv-graphics-vnc-no-listen-attr.args
@@ -0,0 +1,22 @@
+LC_ALL=C \
+PATH=/bin \
+HOME=/home/test \
+USER=test \
+LOGNAME=test \
+QEMU_AUDIO_DRV=none \
+/usr/bin/qemu \
+-name QEMUGuest1 \
+-S \
+-M pc \
+-m 214 \
+-smp 1 \
+-uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
+-nodefaults \
+-monitor unix:/tmp/lib/domain--1-QEMUGuest1/monitor.sock,server,nowait \
+-no-acpi \
+-boot c \
+-usb \
+-drive file=/dev/HostVG/QEMUGuest1,format=raw,if=none,id=drive-ide0-0-0 \
+-device ide-drive,bus=ide.0,unit=0,drive=drive-ide0-0-0,id=ide0-0-0 \
+-vnc '[2001:1:2:3:4:5:1234:1234]:3' \
+-vga cirrus
diff --git a/tests/qemuxml2argvdata/qemuxml2argv-graphics-vnc-no-listen-attr.xml b/tests/qemuxml2argvdata/qemuxml2argv-graphics-vnc-no-listen-attr.xml
new file mode 100644
index 0000000..f80a010
--- /dev/null
+++ b/tests/qemuxml2argvdata/qemuxml2argv-graphics-vnc-no-listen-attr.xml
@@ -0,0 +1,36 @@
+<domain type='qemu'>
+  <name>QEMUGuest1</name>
+  <uuid>c7a5fdbd-edaf-9455-926a-d65c16db1809</uuid>
+  <memory unit='KiB'>219100</memory>
+  <currentMemory unit='KiB'>219100</currentMemory>
+  <vcpu placement='static'>1</vcpu>
+  <os>
+    <type arch='i686' machine='pc'>hvm</type>
+    <boot dev='hd'/>
+  </os>
+  <clock offset='utc'/>
+  <on_poweroff>destroy</on_poweroff>
+  <on_reboot>restart</on_reboot>
+  <on_crash>destroy</on_crash>
+  <devices>
+    <emulator>/usr/bin/qemu</emulator>
+    <disk type='block' device='disk'>
+      <driver name='qemu' type='raw'/>
+      <source dev='/dev/HostVG/QEMUGuest1'/>
+      <target dev='hda' bus='ide'/>
+      <address type='drive' controller='0' bus='0' target='0' unit='0'/>
+    </disk>
+    <controller type='usb' index='0'/>
+    <controller type='ide' index='0'/>
+    <controller type='pci' index='0' model='pci-root'/>
+    <input type='mouse' bus='ps2'/>
+    <input type='keyboard' bus='ps2'/>
+    <graphics type='vnc' port='5903' autoport='no'>
+      <listen type='address' address='2001:1:2:3:4:5:1234:1234'/>
+    </graphics>
+    <video>
+      <model type='cirrus' vram='16384' heads='1'/>
+    </video>
+    <memballoon model='none'/>
+  </devices>
+</domain>
diff --git a/tests/qemuxml2argvtest.c b/tests/qemuxml2argvtest.c
index f1b2a8d..975e358 100644
--- a/tests/qemuxml2argvtest.c
+++ b/tests/qemuxml2argvtest.c
@@ -891,6 +891,7 @@ mymain(void)
     DO_TEST("graphics-vnc-socket", QEMU_CAPS_VNC);
     DO_TEST("graphics-vnc-websocket", QEMU_CAPS_VNC, QEMU_CAPS_VNC_WEBSOCKET);
     DO_TEST("graphics-vnc-policy", QEMU_CAPS_VNC, QEMU_CAPS_VNC_SHARE_POLICY);
+    DO_TEST("graphics-vnc-no-listen-attr", QEMU_CAPS_VNC);
 
     driver.config->vncSASL = 1;
     VIR_FREE(driver.config->vncSASLdir);
diff --git a/tests/qemuxml2xmloutdata/qemuxml2xmlout-graphics-vnc-no-listen-attr.xml b/tests/qemuxml2xmloutdata/qemuxml2xmlout-graphics-vnc-no-listen-attr.xml
new file mode 100644
index 0000000..0627bbd
--- /dev/null
+++ b/tests/qemuxml2xmloutdata/qemuxml2xmlout-graphics-vnc-no-listen-attr.xml
@@ -0,0 +1,41 @@
+<domain type='qemu'>
+  <name>QEMUGuest1</name>
+  <uuid>c7a5fdbd-edaf-9455-926a-d65c16db1809</uuid>
+  <memory unit='KiB'>219100</memory>
+  <currentMemory unit='KiB'>219100</currentMemory>
+  <vcpu placement='static'>1</vcpu>
+  <os>
+    <type arch='i686' machine='pc'>hvm</type>
+    <boot dev='hd'/>
+  </os>
+  <clock offset='utc'/>
+  <on_poweroff>destroy</on_poweroff>
+  <on_reboot>restart</on_reboot>
+  <on_crash>destroy</on_crash>
+  <devices>
+    <emulator>/usr/bin/qemu</emulator>
+    <disk type='block' device='disk'>
+      <driver name='qemu' type='raw'/>
+      <source dev='/dev/HostVG/QEMUGuest1'/>
+      <target dev='hda' bus='ide'/>
+      <address type='drive' controller='0' bus='0' target='0' unit='0'/>
+    </disk>
+    <controller type='usb' index='0'>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x2'/>
+    </controller>
+    <controller type='ide' index='0'>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/>
+    </controller>
+    <controller type='pci' index='0' model='pci-root'/>
+    <input type='mouse' bus='ps2'/>
+    <input type='keyboard' bus='ps2'/>
+    <graphics type='vnc' port='5903' autoport='no' listen='2001:1:2:3:4:5:1234:1234'>
+      <listen type='address' address='2001:1:2:3:4:5:1234:1234'/>
+    </graphics>
+    <video>
+      <model type='cirrus' vram='16384' heads='1' primary='yes'/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/>
+    </video>
+    <memballoon model='none'/>
+  </devices>
+</domain>
diff --git a/tests/qemuxml2xmltest.c b/tests/qemuxml2xmltest.c
index 0735677..dddc775 100644
--- a/tests/qemuxml2xmltest.c
+++ b/tests/qemuxml2xmltest.c
@@ -430,6 +430,7 @@ mymain(void)
     DO_TEST("graphics-vnc-websocket");
     DO_TEST("graphics-vnc-sasl");
     DO_TEST("graphics-vnc-tls");
+    DO_TEST("graphics-vnc-no-listen-attr");
     DO_TEST("graphics-sdl");
     DO_TEST("graphics-sdl-fullscreen");
     DO_TEST("graphics-spice");
-- 
2.8.1

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