[PATCHv2 4/5] qemu: Implement virNodeTunnelTcp for the qemu driver

[Peter Krempa <pkrempa@xxxxxxxxxx>]

The driver function implemented by this patch checks the configuration
if the connection is allowed and opens the connection to the socked
using the fdstream handler.
---
 src/qemu/qemu_driver.c | 48 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 48 insertions(+)

diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index e099c5c..77a404f 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -14868,6 +14868,53 @@ endjob:
 cleanup:
     if (vm)
         virDomainObjUnlock(vm);
+
+    return ret;
+}
+
+static int
+nodeTunnelTCP(virConnectPtr conn,
+              virStreamPtr stream,
+              const char *address,
+              const char *service,
+              unsigned int flags)
+{
+    virQEMUDriverPtr driver = conn->privateData;
+    int config = driver->tunnelTcpRw;
+    int ret = -1;
+
+    virCheckFlags(VIR_NODE_TUNNEL_TCP_IPV4 |
+                  VIR_NODE_TUNNEL_TCP_IPV6, -1);
+
+    if (!address)
+        address = "localhost";
+
+    if (conn->flags & VIR_CONNECT_RO)
+        config = driver->tunnelTcpRo;
+
+    switch (config) {
+    case QEMU_TCP_TUNNEL_DISABLE:
+        virReportError(VIR_ERR_OPERATION_INVALID, "%s",
+                       _("Can't open TCP tunnel: disabled in configuration"));
+        goto cleanup;
+        break;
+    case QEMU_TCP_TUNNEL_LOCAL:
+        if (STRNEQ(address, "localhost")) {
+            virReportError(VIR_ERR_INVALID_ARG,
+                           _("Tunneling to host '%s' forbidden. "
+                             "Only connections to 'localhost' are allowed"),
+                           address);
+            goto cleanup;
+        }
+        break;
+    default:
+        /* ok - can be only reached if enabled */
+        break;
+    }
+
+    ret = virFDStreamConnectTCP(stream, address, service, flags);
+
+cleanup:
     return ret;
 }

@@ -15045,6 +15092,7 @@ static virDriver qemuDriver = {
     .nodeSetMemoryParameters = nodeSetMemoryParameters, /* 0.10.2 */
     .nodeGetCPUMap = nodeGetCPUMap, /* 1.0.0 */
     .domainFSTrim = qemuDomainFSTrim, /* 1.0.1 */
+    .nodeTunnelTCP = nodeTunnelTCP, /* 1.0.1 */
 };


-- 
1.8.0

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