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03a6a2e9 MB |
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" | |
03a6a2e9 MB |
10 | #include <netlink/route/link.h> |
11 | #include <netlink/route/link/vlan.h> | |
12 | ||
13 | #include "utils/common.h" | |
03a6a2e9 MB |
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 | int vlan_add(const char *if_name, int vid, const char *vlan_if_name) | |
25 | { | |
9649b534 | 26 | int err, ret = -1; |
03a6a2e9 | 27 | struct nl_sock *handle = NULL; |
03a6a2e9 MB |
28 | struct rtnl_link *rlink = NULL; |
29 | int if_idx = 0; | |
30 | ||
31 | 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 | if ((os_strlen(if_name) + 1) > IFNAMSIZ) { | |
35 | wpa_printf(MSG_ERROR, "VLAN: Interface name too long: '%s'", | |
36 | if_name); | |
37 | return -1; | |
38 | } | |
39 | ||
40 | if ((os_strlen(vlan_if_name) + 1) > IFNAMSIZ) { | |
41 | wpa_printf(MSG_ERROR, "VLAN: Interface name too long: '%s'", | |
42 | vlan_if_name); | |
43 | return -1; | |
44 | } | |
45 | ||
46 | handle = nl_socket_alloc(); | |
47 | if (!handle) { | |
48 | wpa_printf(MSG_ERROR, "VLAN: failed to open netlink socket"); | |
49 | goto vlan_add_error; | |
50 | } | |
51 | ||
9649b534 MB |
52 | err = nl_connect(handle, NETLINK_ROUTE); |
53 | if (err < 0) { | |
54 | wpa_printf(MSG_ERROR, "VLAN: failed to connect to netlink: %s", | |
55 | nl_geterror(err)); | |
03a6a2e9 MB |
56 | goto vlan_add_error; |
57 | } | |
58 | ||
5aef495f | 59 | err = rtnl_link_get_kernel(handle, 0, if_name, &rlink); |
9649b534 | 60 | if (err < 0) { |
03a6a2e9 MB |
61 | /* link does not exist */ |
62 | wpa_printf(MSG_ERROR, "VLAN: interface %s does not exist", | |
63 | if_name); | |
64 | goto vlan_add_error; | |
65 | } | |
5aef495f MB |
66 | if_idx = rtnl_link_get_ifindex(rlink); |
67 | rtnl_link_put(rlink); | |
68 | rlink = NULL; | |
03a6a2e9 | 69 | |
5aef495f MB |
70 | err = rtnl_link_get_kernel(handle, 0, vlan_if_name, &rlink); |
71 | if (err >= 0) { | |
03a6a2e9 MB |
72 | /* link does exist */ |
73 | rtnl_link_put(rlink); | |
74 | rlink = NULL; | |
75 | wpa_printf(MSG_ERROR, "VLAN: interface %s already exists", | |
76 | vlan_if_name); | |
77 | ret = 1; | |
78 | goto vlan_add_error; | |
79 | } | |
80 | ||
81 | rlink = rtnl_link_alloc(); | |
82 | if (!rlink) { | |
83 | wpa_printf(MSG_ERROR, "VLAN: failed to allocate new link"); | |
84 | goto vlan_add_error; | |
85 | } | |
86 | ||
9649b534 MB |
87 | err = rtnl_link_set_type(rlink, "vlan"); |
88 | if (err < 0) { | |
89 | wpa_printf(MSG_ERROR, "VLAN: failed to set link type: %s", | |
90 | nl_geterror(err)); | |
03a6a2e9 MB |
91 | goto vlan_add_error; |
92 | } | |
93 | ||
94 | rtnl_link_set_link(rlink, if_idx); | |
95 | rtnl_link_set_name(rlink, vlan_if_name); | |
96 | ||
9649b534 MB |
97 | err = rtnl_link_vlan_set_id(rlink, vid); |
98 | if (err < 0) { | |
99 | wpa_printf(MSG_ERROR, "VLAN: failed to set link vlan id: %s", | |
100 | nl_geterror(err)); | |
03a6a2e9 MB |
101 | goto vlan_add_error; |
102 | } | |
103 | ||
9649b534 MB |
104 | err = rtnl_link_add(handle, rlink, NLM_F_CREATE); |
105 | if (err < 0) { | |
03a6a2e9 | 106 | wpa_printf(MSG_ERROR, "VLAN: failed to create link %s for " |
9649b534 MB |
107 | "vlan %d on %s (%d): %s", |
108 | vlan_if_name, vid, if_name, if_idx, | |
109 | nl_geterror(err)); | |
03a6a2e9 MB |
110 | goto vlan_add_error; |
111 | } | |
112 | ||
113 | ret = 0; | |
114 | ||
115 | vlan_add_error: | |
116 | if (rlink) | |
117 | rtnl_link_put(rlink); | |
03a6a2e9 MB |
118 | if (handle) |
119 | nl_socket_free(handle); | |
120 | return ret; | |
121 | } | |
122 | ||
123 | ||
124 | int vlan_rem(const char *if_name) | |
125 | { | |
9649b534 | 126 | int err, ret = -1; |
03a6a2e9 | 127 | struct nl_sock *handle = NULL; |
03a6a2e9 MB |
128 | struct rtnl_link *rlink = NULL; |
129 | ||
130 | wpa_printf(MSG_DEBUG, "VLAN: vlan_rem(if_name=%s)", if_name); | |
131 | ||
132 | handle = nl_socket_alloc(); | |
133 | if (!handle) { | |
134 | wpa_printf(MSG_ERROR, "VLAN: failed to open netlink socket"); | |
135 | goto vlan_rem_error; | |
136 | } | |
137 | ||
9649b534 MB |
138 | err = nl_connect(handle, NETLINK_ROUTE); |
139 | if (err < 0) { | |
140 | wpa_printf(MSG_ERROR, "VLAN: failed to connect to netlink: %s", | |
141 | nl_geterror(err)); | |
03a6a2e9 MB |
142 | goto vlan_rem_error; |
143 | } | |
144 | ||
5aef495f | 145 | err = rtnl_link_get_kernel(handle, 0, if_name, &rlink); |
9649b534 | 146 | if (err < 0) { |
03a6a2e9 MB |
147 | /* link does not exist */ |
148 | wpa_printf(MSG_ERROR, "VLAN: interface %s does not exists", | |
149 | if_name); | |
150 | goto vlan_rem_error; | |
151 | } | |
152 | ||
9649b534 MB |
153 | err = rtnl_link_delete(handle, rlink); |
154 | if (err < 0) { | |
155 | wpa_printf(MSG_ERROR, "VLAN: failed to remove link %s: %s", | |
156 | if_name, nl_geterror(err)); | |
03a6a2e9 MB |
157 | goto vlan_rem_error; |
158 | } | |
159 | ||
160 | ret = 0; | |
161 | ||
162 | vlan_rem_error: | |
163 | if (rlink) | |
164 | rtnl_link_put(rlink); | |
03a6a2e9 MB |
165 | if (handle) |
166 | nl_socket_free(handle); | |
167 | return ret; | |
168 | } | |
84d67551 JM |
169 | |
170 | ||
171 | int vlan_set_name_type(unsigned int name_type) | |
172 | { | |
173 | return 0; | |
174 | } |