1 /* vi: set sw=4 ts=4: */
3 * vconfig implementation for busybox
5 * Copyright (C) 2001 Manuel Novoa III <mjn3@codepoet.org>
7 * Licensed under GPLv2 or later, see file LICENSE in this source tree.
10 /* BB_AUDIT SUSv3 N/A */
12 //usage:#define vconfig_trivial_usage
13 //usage: "COMMAND [OPTIONS]"
14 //usage:#define vconfig_full_usage "\n\n"
15 //usage: "Create and remove virtual ethernet devices\n"
16 //usage: "\n add [interface-name] [vlan_id]"
17 //usage: "\n rem [vlan-name]"
18 //usage: "\n set_flag [interface-name] [flag-num] [0 | 1]"
19 //usage: "\n set_egress_map [vlan-name] [skb_priority] [vlan_qos]"
20 //usage: "\n set_ingress_map [vlan-name] [skb_priority] [vlan_qos]"
21 //usage: "\n set_name_type [name-type]"
26 /* Stuff from linux/if_vlan.h, kernel version 2.4.23 */
27 enum vlan_ioctl_cmds {
30 SET_VLAN_INGRESS_PRIORITY_CMD,
31 SET_VLAN_EGRESS_PRIORITY_CMD,
32 GET_VLAN_INGRESS_PRIORITY_CMD,
33 GET_VLAN_EGRESS_PRIORITY_CMD,
34 SET_VLAN_NAME_TYPE_CMD,
37 enum vlan_name_types {
38 VLAN_NAME_TYPE_PLUS_VID, /* Name will look like: vlan0005 */
39 VLAN_NAME_TYPE_RAW_PLUS_VID, /* name will look like: eth1.0005 */
40 VLAN_NAME_TYPE_PLUS_VID_NO_PAD, /* Name will look like: vlan5 */
41 VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD, /* Name will look like: eth0.5 */
42 VLAN_NAME_TYPE_HIGHEST
45 struct vlan_ioctl_args {
46 int cmd; /* Should be one of the vlan_ioctl_cmds enum above. */
52 unsigned int skb_priority;
53 unsigned int name_type;
54 unsigned int bind_type;
55 unsigned int flag; /* Matches vlan_dev_info flags */
61 #define VLAN_GROUP_ARRAY_LEN 4096
62 #define SIOCSIFVLAN 0x8983 /* Set 802.1Q VLAN options */
64 /* On entry, table points to the length of the current string
65 * plus NUL terminator plus data length for the subsequent entry.
66 * The return value is the last data entry for the matching string. */
67 static const char *xfind_str(const char *table, const char *str)
69 while (strcasecmp(str, table+1) != 0) {
78 static const char cmds[] ALIGN1 = {
83 3, SET_VLAN_NAME_TYPE_CMD, 17,
85 'n', 'a', 'm', 'e', '_',
86 't', 'y', 'p', 'e', 0,
87 5, SET_VLAN_FLAG_CMD, 12,
89 'f', 'l', 'a', 'g', 0,
90 5, SET_VLAN_EGRESS_PRIORITY_CMD, 18,
92 'e', 'g', 'r', 'e', 's', 's', '_',
94 5, SET_VLAN_INGRESS_PRIORITY_CMD, 16,
96 'i', 'n', 'g', 'r', 'e', 's', 's', '_',
100 static const char name_types[] ALIGN1 = {
101 VLAN_NAME_TYPE_PLUS_VID, 16,
103 '_', 'P', 'L', 'U', 'S', '_', 'V', 'I', 'D',
105 VLAN_NAME_TYPE_PLUS_VID_NO_PAD, 22,
107 '_', 'P', 'L', 'U', 'S', '_', 'V', 'I', 'D',
108 '_', 'N', 'O', '_', 'P', 'A', 'D', 0,
109 VLAN_NAME_TYPE_RAW_PLUS_VID, 15,
111 '_', 'P', 'L', 'U', 'S', '_', 'V', 'I', 'D',
113 VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD, 20,
115 '_', 'P', 'L', 'U', 'S', '_', 'V', 'I', 'D',
116 '_', 'N', 'O', '_', 'P', 'A', 'D', 0,
119 static const char conf_file_name[] ALIGN1 = "/proc/net/vlan/config";
121 int vconfig_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
122 int vconfig_main(int argc, char **argv)
124 struct vlan_ioctl_args ifr;
132 /* Don't bother closing the filedes. It will be closed on cleanup. */
133 /* Will die if 802.1q is not present */
134 xopen(conf_file_name, O_RDONLY);
136 memset(&ifr, 0, sizeof(ifr));
139 p = xfind_str(cmds+2, *argv);
145 if (ifr.cmd == SET_VLAN_NAME_TYPE_CMD) { /* set_name_type */
146 ifr.u.name_type = *xfind_str(name_types+1, argv[1]);
148 strncpy_IFNAMSIZ(ifr.device1, argv[1]);
151 /* I suppose one could try to combine some of the function calls below,
152 * since ifr.u.flag, ifr.u.VID, and ifr.u.skb_priority are all same-sized
153 * (unsigned) int members of a unions. But because of the range checking,
154 * doing so wouldn't save that much space and would also make maintainence
156 if (ifr.cmd == SET_VLAN_FLAG_CMD) { /* set_flag */
157 ifr.u.flag = xatoul_range(p, 0, 1);
158 /* DM: in order to set reorder header, qos must be set */
159 ifr.vlan_qos = xatoul_range(argv[3], 0, 7);
160 } else if (ifr.cmd == ADD_VLAN_CMD) { /* add */
161 ifr.u.VID = xatoul_range(p, 0, VLAN_GROUP_ARRAY_LEN-1);
162 } else if (ifr.cmd != DEL_VLAN_CMD) { /* set_{egress|ingress}_map */
163 ifr.u.skb_priority = xatou(p);
164 ifr.vlan_qos = xatoul_range(argv[3], 0, 7);
168 fd = xsocket(AF_INET, SOCK_STREAM, 0);
169 ioctl_or_perror_and_die(fd, SIOCSIFVLAN, &ifr,
170 "ioctl error for %s", *argv);