Line data Source code
1 : /*
2 : * hostapd / VLAN netlink api
3 : * Copyright (c) 2012, Michael Braun <michael-dev@fami-braun.de>
4 : *
5 : * This software may be distributed under the terms of the BSD license.
6 : * See README for more details.
7 : */
8 :
9 : #include "utils/includes.h"
10 : #include <netlink/route/link.h>
11 : #include <netlink/route/link/vlan.h>
12 :
13 : #include "utils/common.h"
14 : #include "vlan_util.h"
15 :
16 : /*
17 : * Add a vlan interface with name 'vlan_if_name', VLAN ID 'vid' and
18 : * tagged interface 'if_name'.
19 : *
20 : * returns -1 on error
21 : * returns 1 if the interface already exists
22 : * returns 0 otherwise
23 : */
24 15 : int vlan_add(const char *if_name, int vid, const char *vlan_if_name)
25 : {
26 15 : int err, ret = -1;
27 15 : struct nl_sock *handle = NULL;
28 15 : struct rtnl_link *rlink = NULL;
29 15 : int if_idx = 0;
30 :
31 15 : wpa_printf(MSG_DEBUG, "VLAN: vlan_add(if_name=%s, vid=%d, "
32 : "vlan_if_name=%s)", if_name, vid, vlan_if_name);
33 :
34 15 : if ((os_strlen(if_name) + 1) > IFNAMSIZ) {
35 0 : wpa_printf(MSG_ERROR, "VLAN: Interface name too long: '%s'",
36 : if_name);
37 0 : return -1;
38 : }
39 :
40 15 : if ((os_strlen(vlan_if_name) + 1) > IFNAMSIZ) {
41 0 : wpa_printf(MSG_ERROR, "VLAN: Interface name too long: '%s'",
42 : vlan_if_name);
43 0 : return -1;
44 : }
45 :
46 15 : handle = nl_socket_alloc();
47 15 : if (!handle) {
48 0 : wpa_printf(MSG_ERROR, "VLAN: failed to open netlink socket");
49 0 : goto vlan_add_error;
50 : }
51 :
52 15 : err = nl_connect(handle, NETLINK_ROUTE);
53 15 : if (err < 0) {
54 0 : wpa_printf(MSG_ERROR, "VLAN: failed to connect to netlink: %s",
55 : nl_geterror(err));
56 0 : goto vlan_add_error;
57 : }
58 :
59 15 : err = rtnl_link_get_kernel(handle, 0, if_name, &rlink);
60 15 : if (err < 0) {
61 : /* link does not exist */
62 0 : wpa_printf(MSG_ERROR, "VLAN: interface %s does not exist",
63 : if_name);
64 0 : goto vlan_add_error;
65 : }
66 15 : if_idx = rtnl_link_get_ifindex(rlink);
67 15 : rtnl_link_put(rlink);
68 15 : rlink = NULL;
69 :
70 15 : err = rtnl_link_get_kernel(handle, 0, vlan_if_name, &rlink);
71 15 : if (err >= 0) {
72 : /* link does exist */
73 4 : rtnl_link_put(rlink);
74 4 : rlink = NULL;
75 4 : wpa_printf(MSG_ERROR, "VLAN: interface %s already exists",
76 : vlan_if_name);
77 4 : ret = 1;
78 4 : goto vlan_add_error;
79 : }
80 :
81 11 : rlink = rtnl_link_alloc();
82 11 : if (!rlink) {
83 0 : wpa_printf(MSG_ERROR, "VLAN: failed to allocate new link");
84 0 : goto vlan_add_error;
85 : }
86 :
87 11 : err = rtnl_link_set_type(rlink, "vlan");
88 11 : if (err < 0) {
89 0 : wpa_printf(MSG_ERROR, "VLAN: failed to set link type: %s",
90 : nl_geterror(err));
91 0 : goto vlan_add_error;
92 : }
93 :
94 11 : rtnl_link_set_link(rlink, if_idx);
95 11 : rtnl_link_set_name(rlink, vlan_if_name);
96 :
97 11 : err = rtnl_link_vlan_set_id(rlink, vid);
98 11 : if (err < 0) {
99 0 : wpa_printf(MSG_ERROR, "VLAN: failed to set link vlan id: %s",
100 : nl_geterror(err));
101 0 : goto vlan_add_error;
102 : }
103 :
104 11 : err = rtnl_link_add(handle, rlink, NLM_F_CREATE);
105 11 : if (err < 0) {
106 2 : wpa_printf(MSG_ERROR, "VLAN: failed to create link %s for "
107 : "vlan %d on %s (%d): %s",
108 : vlan_if_name, vid, if_name, if_idx,
109 : nl_geterror(err));
110 2 : goto vlan_add_error;
111 : }
112 :
113 9 : ret = 0;
114 :
115 : vlan_add_error:
116 15 : if (rlink)
117 11 : rtnl_link_put(rlink);
118 15 : if (handle)
119 15 : nl_socket_free(handle);
120 15 : return ret;
121 : }
122 :
123 :
124 9 : int vlan_rem(const char *if_name)
125 : {
126 9 : int err, ret = -1;
127 9 : struct nl_sock *handle = NULL;
128 9 : struct rtnl_link *rlink = NULL;
129 :
130 9 : wpa_printf(MSG_DEBUG, "VLAN: vlan_rem(if_name=%s)", if_name);
131 :
132 9 : handle = nl_socket_alloc();
133 9 : if (!handle) {
134 0 : wpa_printf(MSG_ERROR, "VLAN: failed to open netlink socket");
135 0 : goto vlan_rem_error;
136 : }
137 :
138 9 : err = nl_connect(handle, NETLINK_ROUTE);
139 9 : if (err < 0) {
140 0 : wpa_printf(MSG_ERROR, "VLAN: failed to connect to netlink: %s",
141 : nl_geterror(err));
142 0 : goto vlan_rem_error;
143 : }
144 :
145 9 : err = rtnl_link_get_kernel(handle, 0, if_name, &rlink);
146 9 : if (err < 0) {
147 : /* link does not exist */
148 5 : wpa_printf(MSG_ERROR, "VLAN: interface %s does not exists",
149 : if_name);
150 5 : goto vlan_rem_error;
151 : }
152 :
153 4 : err = rtnl_link_delete(handle, rlink);
154 4 : if (err < 0) {
155 0 : wpa_printf(MSG_ERROR, "VLAN: failed to remove link %s: %s",
156 : if_name, nl_geterror(err));
157 0 : goto vlan_rem_error;
158 : }
159 :
160 4 : ret = 0;
161 :
162 : vlan_rem_error:
163 9 : if (rlink)
164 4 : rtnl_link_put(rlink);
165 9 : if (handle)
166 9 : nl_socket_free(handle);
167 9 : return ret;
168 : }
169 :
170 :
171 2024 : int vlan_set_name_type(unsigned int name_type)
172 : {
173 2024 : return 0;
174 : }
|
