[PATCH v2] test_driver: properly handle DHCP ranges and IPv6 networks in testDomainInterfaceAddresses

[Ilias Stamatis <stamatis.iliass@xxxxxxxxx>]

testDomainInterfaceAddresses always returns the same hard-coded
addresses. Change the behavior such as if there is a DHCP range defined,
addresses are returned from that pool.

The specific address returned depends on both the domain id and the
specific guest interface in an attempt to return unique addresses *most
of the time*.

Additionally, properly handle IPv6 networks which were previously
ignored completely.

Signed-off-by: Ilias Stamatis <stamatis.iliass@xxxxxxxxx>
---
 src/test/test_driver.c | 44 +++++++++++++++++++++++++++++++++++++-----
 1 file changed, 39 insertions(+), 5 deletions(-)

diff --git a/src/test/test_driver.c b/src/test/test_driver.c
index 2a0ffbc6c5..21bd95941e 100755
--- a/src/test/test_driver.c
+++ b/src/test/test_driver.c
@@ -3414,6 +3414,10 @@ static int testDomainBlockStats(virDomainPtr domain,
     return ret;
 }

+
+static virNetworkObjPtr testNetworkObjFindByName(testDriverPtr privconn, const char *name);
+
+
 static int
 testDomainInterfaceAddresses(virDomainPtr dom,
                              virDomainInterfacePtr **ifaces,
@@ -3422,11 +3426,15 @@ testDomainInterfaceAddresses(virDomainPtr dom,
 {
     size_t i;
     size_t ifaces_count = 0;
+    size_t addr_offset;
     int ret = -1;
     char macaddr[VIR_MAC_STRING_BUFLEN];
     virDomainObjPtr vm = NULL;
     virDomainInterfacePtr iface = NULL;
     virDomainInterfacePtr *ifaces_ret = NULL;
+    virSocketAddr addr;
+    virNetworkObjPtr net = NULL;
+    virNetworkDefPtr net_def = NULL;

     virCheckFlags(0, -1);

@@ -3447,6 +3455,12 @@ testDomainInterfaceAddresses(virDomainPtr dom,
         goto cleanup;

     for (i = 0; i < vm->def->nnets; i++) {
+        if (!(net = testNetworkObjFindByName(dom->conn->privateData,
+                                             vm->def->nets[i]->data.network.name)))
+            goto cleanup;
+
+        net_def = virNetworkObjGetDef(net);
+
         if (VIR_ALLOC(iface) < 0)
             goto cleanup;

@@ -3460,14 +3474,33 @@ testDomainInterfaceAddresses(virDomainPtr dom,
         if (VIR_ALLOC(iface->addrs) < 0)
             goto cleanup;

-        iface->addrs[0].type = VIR_IP_ADDR_TYPE_IPV4;
-        iface->addrs[0].prefix = 24;
-        if (virAsprintf(&iface->addrs[0].addr, "192.168.0.%zu", 1 + i) < 0)
-            goto cleanup;
-
         iface->naddrs = 1;
+        iface->addrs[0].prefix = virSocketAddrGetIPPrefix(&net_def->ips->address,
+                                                          &net_def->ips->netmask,
+                                                          net_def->ips->prefix);
+
+        if (net_def->ips->nranges > 0)
+            addr = net_def->ips->ranges[0].start;
+        else
+            addr = net_def->ips->address;
+
+        /* try using different addresses per different inf and domain */
+        addr_offset = 20 * (vm->def->id - 1) + i + 1;
+
+        if (net_def->ips->family && STREQ(net_def->ips->family, "ipv6")) {
+            iface->addrs[0].type = VIR_IP_ADDR_TYPE_IPV6;
+            addr.data.inet6.sin6_addr.s6_addr[15] += addr_offset;
+        } else {
+            iface->addrs[0].type = VIR_IP_ADDR_TYPE_IPV4;
+            addr.data.inet4.sin_addr.s_addr = \
+                htonl(ntohl(addr.data.inet4.sin_addr.s_addr) + addr_offset);
+        }
+
+        if (!(iface->addrs[0].addr = virSocketAddrFormat(&addr)))
+            goto cleanup;

         VIR_APPEND_ELEMENT_INPLACE(ifaces_ret, ifaces_count, iface);
+        virNetworkObjEndAPI(&net);
     }

     VIR_STEAL_PTR(*ifaces, ifaces_ret);
@@ -3475,6 +3508,7 @@ testDomainInterfaceAddresses(virDomainPtr dom,

  cleanup:
     virDomainObjEndAPI(&vm);
+    virNetworkObjEndAPI(&net);

     if (ifaces_ret) {
         for (i = 0; i < ifaces_count; i++)
--
2.22.0

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