1 /*
2 * hostapd / VLAN ioctl API
3 * Copyright 2003, Instant802 Networks, Inc.
4 * Copyright 2005-2006, Devicescape Software, Inc.
5 * Copyright (c) 2009, Jouni Malinen <j@w1.fi>
6 *
7 * This software may be distributed under the terms of the BSD license.
8 * See README for more details.
9 */
10
11 #include "utils/includes.h"
12 #include <sys/ioctl.h>
13
14 #include "utils/common.h"
15 #include "common/linux_vlan.h"
16 #include "vlan_util.h"
17
18
vlan_rem(const char * if_name)19 int vlan_rem(const char *if_name)
20 {
21 int fd;
22 struct vlan_ioctl_args if_request;
23
24 wpa_printf(MSG_DEBUG, "VLAN: vlan_rem(%s)", if_name);
25 if ((os_strlen(if_name) + 1) > sizeof(if_request.device1)) {
26 wpa_printf(MSG_ERROR, "VLAN: Interface name too long: '%s'",
27 if_name);
28 return -1;
29 }
30
31 if ((fd = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
32 wpa_printf(MSG_ERROR, "VLAN: %s: socket(AF_INET,SOCK_STREAM) "
33 "failed: %s", __func__, strerror(errno));
34 return -1;
35 }
36
37 os_memset(&if_request, 0, sizeof(if_request));
38
39 os_strlcpy(if_request.device1, if_name, sizeof(if_request.device1));
40 if_request.cmd = DEL_VLAN_CMD;
41
42 if (ioctl(fd, SIOCSIFVLAN, &if_request) < 0) {
43 wpa_printf(MSG_ERROR, "VLAN: %s: DEL_VLAN_CMD failed for %s: "
44 "%s", __func__, if_name, strerror(errno));
45 close(fd);
46 return -1;
47 }
48
49 close(fd);
50 return 0;
51 }
52
53
54 /*
55 Add a vlan interface with VLAN ID 'vid' and tagged interface
56 'if_name'.
57
58 returns -1 on error
59 returns 1 if the interface already exists
60 returns 0 otherwise
61 */
vlan_add(const char * if_name,int vid,const char * vlan_if_name)62 int vlan_add(const char *if_name, int vid, const char *vlan_if_name)
63 {
64 int fd;
65 struct vlan_ioctl_args if_request;
66
67 wpa_printf(MSG_DEBUG, "VLAN: vlan_add(if_name=%s, vid=%d)",
68 if_name, vid);
69 ifconfig_up(if_name);
70
71 if ((os_strlen(if_name) + 1) > sizeof(if_request.device1)) {
72 wpa_printf(MSG_ERROR, "VLAN: Interface name too long: '%s'",
73 if_name);
74 return -1;
75 }
76
77 if ((fd = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
78 wpa_printf(MSG_ERROR, "VLAN: %s: socket(AF_INET,SOCK_STREAM) "
79 "failed: %s", __func__, strerror(errno));
80 return -1;
81 }
82
83 os_memset(&if_request, 0, sizeof(if_request));
84
85 /* Determine if a suitable vlan device already exists. */
86
87 os_snprintf(if_request.device1, sizeof(if_request.device1), "vlan%d",
88 vid);
89
90 if_request.cmd = GET_VLAN_VID_CMD;
91
92 if (ioctl(fd, SIOCSIFVLAN, &if_request) == 0 &&
93 if_request.u.VID == vid) {
94 if_request.cmd = GET_VLAN_REALDEV_NAME_CMD;
95
96 if (ioctl(fd, SIOCSIFVLAN, &if_request) == 0 &&
97 os_strncmp(if_request.u.device2, if_name,
98 sizeof(if_request.u.device2)) == 0) {
99 close(fd);
100 wpa_printf(MSG_DEBUG,
101 "VLAN: vlan_add: if_name %s exists already",
102 if_request.device1);
103 return 1;
104 }
105 }
106
107 /* A suitable vlan device does not already exist, add one. */
108
109 os_memset(&if_request, 0, sizeof(if_request));
110 os_strlcpy(if_request.device1, if_name, sizeof(if_request.device1));
111 if_request.u.VID = vid;
112 if_request.cmd = ADD_VLAN_CMD;
113
114 if (ioctl(fd, SIOCSIFVLAN, &if_request) < 0) {
115 wpa_printf(MSG_ERROR,
116 "VLAN: %s: ADD_VLAN_CMD failed for %s: %s",
117 __func__, if_request.device1, strerror(errno));
118 close(fd);
119 return -1;
120 }
121
122 close(fd);
123 return 0;
124 }
125
126
vlan_set_name_type(unsigned int name_type)127 int vlan_set_name_type(unsigned int name_type)
128 {
129 int fd;
130 struct vlan_ioctl_args if_request;
131
132 wpa_printf(MSG_DEBUG, "VLAN: vlan_set_name_type(name_type=%u)",
133 name_type);
134 if ((fd = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
135 wpa_printf(MSG_ERROR,
136 "VLAN: %s: socket(AF_INET,SOCK_STREAM) failed: %s",
137 __func__, strerror(errno));
138 return -1;
139 }
140
141 os_memset(&if_request, 0, sizeof(if_request));
142
143 if_request.u.name_type = name_type;
144 if_request.cmd = SET_VLAN_NAME_TYPE_CMD;
145 if (ioctl(fd, SIOCSIFVLAN, &if_request) < 0) {
146 wpa_printf(MSG_ERROR,
147 "VLAN: %s: SET_VLAN_NAME_TYPE_CMD name_type=%u failed: %s",
148 __func__, name_type, strerror(errno));
149 close(fd);
150 return -1;
151 }
152
153 close(fd);
154 return 0;
155 }
156