[ 2/5] libvirt domain xml allow to set peer address

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Signed-off-by: Vasiliy Tolstov <v.tolstov@xxxxxxxxx>
---
 docs/formatdomain.html.in     | 12 +++++++++++-
 docs/schemas/domaincommon.rng |  5 +++++
 src/conf/domain_conf.c        | 14 +++++++++++++-
 src/conf/domain_conf.h        |  1 +
 4 files changed, 30 insertions(+), 2 deletions(-)

diff --git a/docs/formatdomain.html.in b/docs/formatdomain.html.in
index 957b839eb745..a6c6b15aa8e4 100644
--- a/docs/formatdomain.html.in
+++ b/docs/formatdomain.html.in
@@ -4758,6 +4758,7 @@ qemu-kvm -net nic,model=? /dev/null
       &lt;source network='default'/&gt;
       &lt;target dev='vnet0'/&gt;
       <b>&lt;ip address='192.168.122.5' prefix='24'/&gt;</b>
+      <b>&lt;ip address='192.168.122.5' prefix='24' peer='10.0.0.10'/&gt;</b>
       <b>&lt;route family='ipv4' address='192.168.122.0' prefix='24' gateway='192.168.122.1'/&gt;</b>
       <b>&lt;route family='ipv4' address='192.168.122.8' gateway='192.168.122.1'/&gt;</b>
     &lt;/interface&gt;
@@ -4790,7 +4791,16 @@ qemu-kvm -net nic,model=? /dev/null
     to define the network routes to use for the network device. The attributes
     of this element are described in the documentation for the <code>route</code>
     element in <a href="formatnetwork.html#elementsStaticroute">network definitions</a>.
-    This is only used by the LXC driver.
+    This is used by the LXC driver and <span class="since">Since 1.3.3</span> by the QEMU
+    driver.
+    </p>
+
+    <p>
+    <span class="since">Since 1.3.3</span> ip elements can hold peer attribute to assign
+    a point-to-point address for the network device. The attributes  of this element
+    are described in the documentation for the <code>ip</code> element in
+    <a href="formatnetwork.html#elementsAddress">network definitions</a>.
+    This is only used by the LXC and QEMU drivers.
     </p>
 
     <h5><a name="elementVhostuser">vhost-user interface</a></h5>
diff --git a/docs/schemas/domaincommon.rng b/docs/schemas/domaincommon.rng
index 54c149dd5290..fa545261326d 100644
--- a/docs/schemas/domaincommon.rng
+++ b/docs/schemas/domaincommon.rng
@@ -2393,6 +2393,11 @@
               <ref name="ipPrefix"/>
             </attribute>
           </optional>
+          <optional>
+            <attribute name="peer">
+              <ref name="ipAddr"/>
+            </attribute>
+          </optional>
           <empty/>
         </element>
       </zeroOrMore>
diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
index d4c78fdb9fbb..65d2b3eeef3b 100644
--- a/src/conf/domain_conf.c
+++ b/src/conf/domain_conf.c
@@ -5734,7 +5734,7 @@ virDomainNetIpParseXML(xmlNodePtr node)
     unsigned int prefixValue = 0;
     char *familyStr = NULL;
     int family = AF_UNSPEC;
-    char *address = NULL;
+    char *address = NULL, *peer = NULL;
 
     if (!(prefixStr = virXMLPropString(node, "prefix")) ||
         (virStrToLong_ui(prefixStr, NULL, 10, &prefixValue) < 0)) {
@@ -5748,6 +5748,9 @@ virDomainNetIpParseXML(xmlNodePtr node)
         goto cleanup;
     }
 
+    if ((peer = virXMLPropString(node, "peer")) == NULL)
+        VIR_DEBUG("Peer is empty");
+
     familyStr = virXMLPropString(node, "family");
     if (familyStr && STREQ(familyStr, "ipv4"))
         family = AF_INET;
@@ -5765,6 +5768,14 @@ virDomainNetIpParseXML(xmlNodePtr node)
                        address);
         goto cleanup;
     }
+
+    if ((peer != NULL) && (virSocketAddrParse(&ip->peer, peer, family) < 0)) {
+            virReportError(VIR_ERR_INVALID_ARG,
+                           _("Failed to parse IP address: '%s'"),
+                           peer);
+            goto cleanup;
+    }
+
     ip->prefix = prefixValue;
 
     ret = ip;
@@ -5774,6 +5785,7 @@ virDomainNetIpParseXML(xmlNodePtr node)
     VIR_FREE(prefixStr);
     VIR_FREE(familyStr);
     VIR_FREE(address);
+    VIR_FREE(peer);
     VIR_FREE(ip);
     return ret;
 }
diff --git a/src/conf/domain_conf.h b/src/conf/domain_conf.h
index fe9faebff6d6..029eee3a5618 100644
--- a/src/conf/domain_conf.h
+++ b/src/conf/domain_conf.h
@@ -514,6 +514,7 @@ typedef struct _virDomainNetIpDef virDomainNetIpDef;
 typedef virDomainNetIpDef *virDomainNetIpDefPtr;
 struct _virDomainNetIpDef {
     virSocketAddr address;       /* ipv4 or ipv6 address */
+    virSocketAddr peer;    /* ipv4 or ipv6 address of peer */
     unsigned int prefix; /* number of 1 bits in the net mask */
 };
 
-- 
2.7.3

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