net/vmnet-shared.c

   1 /*
   2  * vmnet-shared.c
   3  *
   4  * Copyright(c) 2022 Vladislav Yaroshchuk <vladislav.yaroshchuk@jetbrains.com>
   5  *
   6  * This work is licensed under the terms of the GNU GPL, version 2 or later.
   7  * See the COPYING file in the top-level directory.
   8  *
   9  */
  10
  11 #include "qemu/osdep.h"
  12 #include "qapi/qapi-types-net.h"
  13 #include "qapi/error.h"
  14 #include "vmnet_int.h"
  15 #include "clients.h"
  16
  17 #include <vmnet/vmnet.h>
  18
  19
  20 static bool validate_options(const Netdev *netdev, Error **errp)
  21 {
  22     const NetdevVmnetSharedOptions *options = &(netdev->u.vmnet_shared);
  23
  24     if ((options->start_address ||
  25          options->end_address ||
  26          options->subnet_mask) &&
  27         !(options->start_address &&
  28           options->end_address &&
  29           options->subnet_mask)) {
  30         error_setg(errp,
  31                    "'start-address', 'end-address', 'subnet-mask' "
  32                    "should be provided together"
  33         );
  34         return false;
  35     }
  36
  37     return true;
  38 }
  39
  40 static xpc_object_t build_if_desc(const Netdev *netdev)
  41 {
  42     const NetdevVmnetSharedOptions *options = &(netdev->u.vmnet_shared);
  43     xpc_object_t if_desc = xpc_dictionary_create(NULL, NULL, 0);
  44
  45     xpc_dictionary_set_uint64(
  46         if_desc,
  47         vmnet_operation_mode_key,
  48         VMNET_SHARED_MODE
  49     );
  50
  51     if (options->nat66_prefix) {
  52         xpc_dictionary_set_string(if_desc,
  53                                   vmnet_nat66_prefix_key,
  54                                   options->nat66_prefix);
  55     }
  56
  57     if (options->start_address) {
  58         xpc_dictionary_set_string(if_desc,
  59                                   vmnet_start_address_key,
  60                                   options->start_address);
  61         xpc_dictionary_set_string(if_desc,
  62                                   vmnet_end_address_key,
  63                                   options->end_address);
  64         xpc_dictionary_set_string(if_desc,
  65                                   vmnet_subnet_mask_key,
  66                                   options->subnet_mask);
  67     }
  68
  69     xpc_dictionary_set_bool(
  70         if_desc,
  71         vmnet_enable_isolation_key,
  72         options->isolated
  73     );
  74
  75     return if_desc;
  76 }
  77
  78 static NetClientInfo net_vmnet_shared_info = {
  79     .type = NET_CLIENT_DRIVER_VMNET_SHARED,
  80     .size = sizeof(VmnetState),
  81     .receive = vmnet_receive_common,
  82     .cleanup = vmnet_cleanup_common,
  83 };
  84
  85 int net_init_vmnet_shared(const Netdev *netdev, const char *name,
  86                           NetClientState *peer, Error **errp)
  87 {
  88     NetClientState *nc = qemu_new_net_client(&net_vmnet_shared_info,
  89                                              peer, "vmnet-shared", name);
  90     xpc_object_t if_desc;
  91     int result = -1;
  92
  93     if (!validate_options(netdev, errp)) {
  94         return result;
  95     }
  96
  97     if_desc = build_if_desc(netdev);
  98     result = vmnet_if_create(nc, if_desc, errp);
  99     xpc_release(if_desc);
 100     return result;
 101 }