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1 /*
2 * vmnet-bridged.m
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 "clients.h"
15 #include "vmnet_int.h"
16
17 #include <vmnet/vmnet.h>
18
19
20 static bool validate_ifname(const char *ifname)
21 {
22 xpc_object_t shared_if_list = vmnet_copy_shared_interface_list();
23 bool match = false;
24 if (!xpc_array_get_count(shared_if_list)) {
25 goto done;
26 }
27
28 match = !xpc_array_apply(
29 shared_if_list,
30 ^bool(size_t index, xpc_object_t value) {
31 return strcmp(xpc_string_get_string_ptr(value), ifname) != 0;
32 });
33
34 done:
35 xpc_release(shared_if_list);
36 return match;
37 }
38
39
40 static char* get_valid_ifnames(void)
41 {
42 xpc_object_t shared_if_list = vmnet_copy_shared_interface_list();
43 __block char *if_list = NULL;
44 __block char *if_list_prev = NULL;
45
46 if (!xpc_array_get_count(shared_if_list)) {
47 goto done;
48 }
49
50 xpc_array_apply(
51 shared_if_list,
52 ^bool(size_t index, xpc_object_t value) {
53 /* build list of strings like "en0 en1 en2 " */
54 if_list = g_strconcat(xpc_string_get_string_ptr(value),
55 " ",
56 if_list_prev,
57 NULL);
58 g_free(if_list_prev);
59 if_list_prev = if_list;
60 return true;
61 });
62
63 done:
64 xpc_release(shared_if_list);
65 return if_list;
66 }
67
68
69 static bool validate_options(const Netdev *netdev, Error **errp)
70 {
71 const NetdevVmnetBridgedOptions *options = &(netdev->u.vmnet_bridged);
72 char* if_list;
73
74 if (!validate_ifname(options->ifname)) {
75 if_list = get_valid_ifnames();
76 if (if_list) {
77 error_setg(errp,
78 "unsupported ifname '%s', expected one of [ %s]",
79 options->ifname,
80 if_list);
81 g_free(if_list);
82 } else {
83 error_setg(errp,
84 "unsupported ifname '%s', no supported "
85 "interfaces available",
86 options->ifname);
87 }
88 return false;
89 }
90
91 return true;
92 }
93
94
95 static xpc_object_t build_if_desc(const Netdev *netdev)
96 {
97 const NetdevVmnetBridgedOptions *options = &(netdev->u.vmnet_bridged);
98 xpc_object_t if_desc = xpc_dictionary_create(NULL, NULL, 0);
99
100 xpc_dictionary_set_uint64(if_desc,
101 vmnet_operation_mode_key,
102 VMNET_BRIDGED_MODE
103 );
104
105 xpc_dictionary_set_string(if_desc,
106 vmnet_shared_interface_name_key,
107 options->ifname);
108
109 xpc_dictionary_set_bool(if_desc,
110 vmnet_enable_isolation_key,
111 options->isolated);
112
113 return if_desc;
114 }
115
116
117 static NetClientInfo net_vmnet_bridged_info = {
118 .type = NET_CLIENT_DRIVER_VMNET_BRIDGED,
119 .size = sizeof(VmnetState),
120 .receive = vmnet_receive_common,
121 .cleanup = vmnet_cleanup_common,
122 };
123
124
125 int net_init_vmnet_bridged(const Netdev *netdev, const char *name,
126 NetClientState *peer, Error **errp)
127 {
128 NetClientState *nc = qemu_new_net_client(&net_vmnet_bridged_info,
129 peer, "vmnet-bridged", name);
130 xpc_object_t if_desc;
131 int result = -1;
132
133 if (!validate_options(netdev, errp)) {
134 return result;
135 }
136
137 if_desc = build_if_desc(netdev);
138 result = vmnet_if_create(nc, if_desc, errp);
139 xpc_release(if_desc);
140 return result;
141 }