[PATCH v2 4/6] net/vmnet: implement host mode (vmnet-host)

[Vladislav Yaroshchuk <yaroshchuk2000@gmail.com>]

Still not implemented:
- port forwarding

Signed-off-by: Vladislav Yaroshchuk <yaroshchuk2000@gmail.com>
---
 net/vmnet-host.c | 75 ++++++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 72 insertions(+), 3 deletions(-)

diff --git a/net/vmnet-host.c b/net/vmnet-host.c
index 1d3484b51e..77a2c20b48 100644
--- a/net/vmnet-host.c
+++ b/net/vmnet-host.c
@@ -17,8 +17,77 @@
 
 #include <vmnet/vmnet.h>
 
+typedef struct VmnetHostState {
+  VmnetCommonState common;
+
+} VmnetHostState;
+
+static xpc_object_t create_if_desc(const Netdev *netdev, Error **errp);
+
+static NetClientInfo net_vmnet_host_info = {
+    .type = NET_CLIENT_DRIVER_VMNET_HOST,
+    .size = sizeof(VmnetHostState),
+    .receive = vmnet_receive_common,
+    .cleanup = vmnet_cleanup_common,
+};
+
 int net_init_vmnet_host(const Netdev *netdev, const char *name,
-                        NetClientState *peer, Error **errp) {
-  error_setg(errp, "vmnet-host is not implemented yet");
-  return -1;
+                        NetClientState *peer, Error **errp)
+{
+    NetClientState *nc;
+    xpc_object_t if_desc;
+
+    nc = qemu_new_net_client(&net_vmnet_host_info,
+                             peer, "vmnet-host", name);
+    if_desc = create_if_desc(netdev, errp);
+    return vmnet_if_create(nc, if_desc, errp, NULL);
+}
+
+static xpc_object_t create_if_desc(const Netdev *netdev, Error **errp)
+{
+    const NetdevVmnetHostOptions *options;
+    xpc_object_t if_desc;
+
+    if_desc = xpc_dictionary_create(NULL, NULL, 0);
+    xpc_dictionary_set_uint64(
+        if_desc,
+        vmnet_operation_mode_key,
+        VMNET_HOST_MODE
+    );
+
+    xpc_dictionary_set_bool(
+        if_desc,
+        vmnet_allocate_mac_address_key,
+        false
+    );
+
+    options = &(netdev->u.vmnet_host);
+
+    if (options->has_dhcpstart ||
+        options->has_dhcpend ||
+        options->has_subnetmask) {
+
+        if (options->has_dhcpstart &&
+            options->has_dhcpend &&
+            options->has_subnetmask) {
+
+            xpc_dictionary_set_string(if_desc,
+                                      vmnet_start_address_key,
+                                      options->dhcpstart);
+            xpc_dictionary_set_string(if_desc,
+                                      vmnet_end_address_key,
+                                      options->dhcpend);
+            xpc_dictionary_set_string(if_desc,
+                                      vmnet_subnet_mask_key,
+                                      options->subnetmask);
+        } else {
+            error_setg(
+                errp,
+                "'dhcpstart', 'dhcpend', 'subnetmask' "
+                "must be provided together"
+            );
+        }
+    }
+
+    return if_desc;
 }
-- 
2.23.0