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Manuel Novoa III cad53642003-03-19 09:13:01 +00001/* vi: set sw=4 ts=4: */
2/*
3 * vconfig implementation for busybox
4 *
5 * Copyright (C) 2001 Manuel Novoa III <mjn3@codepoet.org>
6 *
Denys Vlasenko0ef64bd2010-08-16 20:14:46 +02007 * Licensed under GPLv2 or later, see file LICENSE in this source tree.
Manuel Novoa III cad53642003-03-19 09:13:01 +00008 */
Denys Vlasenko47367e12016-11-23 09:05:14 +01009//config:config VCONFIG
Denys Vlasenkob097a842018-12-28 03:20:17 +010010//config: bool "vconfig (2.3 kb)"
Denys Vlasenko47367e12016-11-23 09:05:14 +010011//config: default y
Denys Vlasenko47367e12016-11-23 09:05:14 +010012//config: help
Denys Vlasenko72089cf2017-07-21 09:50:55 +020013//config: Creates, removes, and configures VLAN interfaces
Denys Vlasenko47367e12016-11-23 09:05:14 +010014
Denys Vlasenkoa4d4ab02017-08-09 18:52:19 +020015//applet:IF_VCONFIG(APPLET_NOEXEC(vconfig, vconfig, BB_DIR_SBIN, BB_SUID_DROP, vconfig))
Denys Vlasenko47367e12016-11-23 09:05:14 +010016
17//kbuild:lib-$(CONFIG_VCONFIG) += vconfig.o
18
Pere Orga5bc8c002011-04-11 03:29:49 +020019//usage:#define vconfig_trivial_usage
20//usage: "COMMAND [OPTIONS]"
21//usage:#define vconfig_full_usage "\n\n"
22//usage: "Create and remove virtual ethernet devices\n"
Denys Vlasenko6b6826f2021-06-13 01:08:48 +020023//usage: "\n add IFACE VLAN_ID"
24//usage: "\n rem VLAN_NAME"
25//usage: "\n set_flag IFACE 0|1 VLAN_QOS"
26//usage: "\n set_egress_map VLAN_NAME SKB_PRIO VLAN_QOS"
27//usage: "\n set_ingress_map VLAN_NAME SKB_PRIO VLAN_QOS"
28//usage: "\n set_name_type NAME_TYPE"
Pere Orga5bc8c002011-04-11 03:29:49 +020029
Denis Vlasenkob6adbf12007-05-26 19:00:18 +000030#include "libbb.h"
Rob Landleyd921b2e2006-08-03 15:41:12 +000031#include <net/if.h>
Eric Andersen853c4942003-01-23 05:59:32 +000032
Denys Vlasenko0c4dbd42017-09-18 16:28:43 +020033/* BB_AUDIT SUSv3 N/A */
34
Eric Andersenb8d2cd42003-12-19 10:40:56 +000035/* Stuff from linux/if_vlan.h, kernel version 2.4.23 */
36enum vlan_ioctl_cmds {
37 ADD_VLAN_CMD,
38 DEL_VLAN_CMD,
39 SET_VLAN_INGRESS_PRIORITY_CMD,
40 SET_VLAN_EGRESS_PRIORITY_CMD,
41 GET_VLAN_INGRESS_PRIORITY_CMD,
42 GET_VLAN_EGRESS_PRIORITY_CMD,
43 SET_VLAN_NAME_TYPE_CMD,
44 SET_VLAN_FLAG_CMD
45};
46enum vlan_name_types {
47 VLAN_NAME_TYPE_PLUS_VID, /* Name will look like: vlan0005 */
48 VLAN_NAME_TYPE_RAW_PLUS_VID, /* name will look like: eth1.0005 */
49 VLAN_NAME_TYPE_PLUS_VID_NO_PAD, /* Name will look like: vlan5 */
50 VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD, /* Name will look like: eth0.5 */
51 VLAN_NAME_TYPE_HIGHEST
52};
53
54struct vlan_ioctl_args {
55 int cmd; /* Should be one of the vlan_ioctl_cmds enum above. */
56 char device1[24];
57
Tim Rikerc1ef7bd2006-01-25 00:08:53 +000058 union {
Eric Andersenb8d2cd42003-12-19 10:40:56 +000059 char device2[24];
60 int VID;
61 unsigned int skb_priority;
62 unsigned int name_type;
63 unsigned int bind_type;
64 unsigned int flag; /* Matches vlan_dev_info flags */
Tim Rikerc1ef7bd2006-01-25 00:08:53 +000065 } u;
Eric Andersenb8d2cd42003-12-19 10:40:56 +000066
Eric Andersenc7bda1c2004-03-15 08:29:22 +000067 short vlan_qos;
Eric Andersenb8d2cd42003-12-19 10:40:56 +000068};
69
Denys Vlasenkofb132e42010-10-29 11:46:52 +020070#define VLAN_GROUP_ARRAY_LEN 4096
71#define SIOCSIFVLAN 0x8983 /* Set 802.1Q VLAN options */
Eric Andersen853c4942003-01-23 05:59:32 +000072
Denis Vlasenkoc5045fd2008-12-02 20:38:36 +000073/* On entry, table points to the length of the current string
74 * plus NUL terminator plus data length for the subsequent entry.
75 * The return value is the last data entry for the matching string. */
Glenn L McGrathb4f3d7f2003-02-08 23:11:19 +000076static const char *xfind_str(const char *table, const char *str)
77{
Denys Vlasenkofdd0b3b2012-01-16 04:00:37 +010078 while (strcasecmp(str, table + 1) != 0) {
79 if (!table[0])
Manuel Novoa III cad53642003-03-19 09:13:01 +000080 bb_show_usage();
Denys Vlasenkofdd0b3b2012-01-16 04:00:37 +010081 table += table[0];
Glenn L McGrathb4f3d7f2003-02-08 23:11:19 +000082 }
83 return table - 1;
84}
Eric Andersen853c4942003-01-23 05:59:32 +000085
Denis Vlasenko6ca409e2007-08-12 20:58:27 +000086static const char cmds[] ALIGN1 = {
Glenn L McGrathb4f3d7f2003-02-08 23:11:19 +000087 4, ADD_VLAN_CMD, 7,
Denys Vlasenkofdd0b3b2012-01-16 04:00:37 +010088 'a','d','d',0,
Glenn L McGrathb4f3d7f2003-02-08 23:11:19 +000089 3, DEL_VLAN_CMD, 7,
Denys Vlasenkofdd0b3b2012-01-16 04:00:37 +010090 'r','e','m',0,
Glenn L McGrathb4f3d7f2003-02-08 23:11:19 +000091 3, SET_VLAN_NAME_TYPE_CMD, 17,
Denys Vlasenkofdd0b3b2012-01-16 04:00:37 +010092 's','e','t','_','n','a','m','e','_','t','y','p','e',0,
Denis Vlasenko3038ac92006-09-30 19:37:25 +000093 5, SET_VLAN_FLAG_CMD, 12,
Denys Vlasenkofdd0b3b2012-01-16 04:00:37 +010094 's','e','t','_','f','l','a','g',0,
Glenn L McGrathb4f3d7f2003-02-08 23:11:19 +000095 5, SET_VLAN_EGRESS_PRIORITY_CMD, 18,
Denys Vlasenkofdd0b3b2012-01-16 04:00:37 +010096 's','e','t','_','e','g','r','e','s','s','_','m','a','p',0,
97 5, SET_VLAN_INGRESS_PRIORITY_CMD, 0,
98 's','e','t','_','i','n','g','r','e','s','s','_','m','a','p',0,
Glenn L McGrathb4f3d7f2003-02-08 23:11:19 +000099};
Eric Andersen853c4942003-01-23 05:59:32 +0000100
Denis Vlasenko6ca409e2007-08-12 20:58:27 +0000101static const char name_types[] ALIGN1 = {
Glenn L McGrathb4f3d7f2003-02-08 23:11:19 +0000102 VLAN_NAME_TYPE_PLUS_VID, 16,
Denys Vlasenkofdd0b3b2012-01-16 04:00:37 +0100103 'V','L','A','N','_','P','L','U','S','_','V','I','D',0,
Glenn L McGrathb4f3d7f2003-02-08 23:11:19 +0000104 VLAN_NAME_TYPE_PLUS_VID_NO_PAD, 22,
Denys Vlasenkofdd0b3b2012-01-16 04:00:37 +0100105 'V','L','A','N','_','P','L','U','S','_','V','I','D','_','N','O','_','P','A','D',0,
Glenn L McGrathb4f3d7f2003-02-08 23:11:19 +0000106 VLAN_NAME_TYPE_RAW_PLUS_VID, 15,
Denys Vlasenkofdd0b3b2012-01-16 04:00:37 +0100107 'D','E','V','_','P','L','U','S','_','V','I','D',0,
108 VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD, 0,
109 'D','E','V','_','P','L','U','S','_','V','I','D','_','N','O','_','P','A','D',0,
Glenn L McGrathb4f3d7f2003-02-08 23:11:19 +0000110};
Eric Andersen853c4942003-01-23 05:59:32 +0000111
Denis Vlasenko9b49a5e2007-10-11 10:05:36 +0000112int vconfig_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
Glenn L McGrathb4f3d7f2003-02-08 23:11:19 +0000113int vconfig_main(int argc, char **argv)
114{
115 struct vlan_ioctl_args ifr;
116 const char *p;
117 int fd;
Eric Andersen853c4942003-01-23 05:59:32 +0000118
Denis Vlasenkoc5045fd2008-12-02 20:38:36 +0000119 memset(&ifr, 0, sizeof(ifr));
Glenn L McGrathb4f3d7f2003-02-08 23:11:19 +0000120
121 ++argv;
Denys Vlasenkofdd0b3b2012-01-16 04:00:37 +0100122 if (!argv[0])
Manuel Novoa III cad53642003-03-19 09:13:01 +0000123 bb_show_usage();
Denys Vlasenkofdd0b3b2012-01-16 04:00:37 +0100124 p = xfind_str(cmds + 2, argv[0]);
125 ifr.cmd = *p;
126 if (argc != p[-1])
127 bb_show_usage();
Glenn L McGrathb4f3d7f2003-02-08 23:11:19 +0000128
Denys Vlasenkofdd0b3b2012-01-16 04:00:37 +0100129 if (ifr.cmd == SET_VLAN_NAME_TYPE_CMD) {
130 /* set_name_type */
131 ifr.u.name_type = *xfind_str(name_types + 1, argv[1]);
Glenn L McGrathb4f3d7f2003-02-08 23:11:19 +0000132 } else {
Denis Vlasenko360d9662008-12-02 18:18:50 +0000133 strncpy_IFNAMSIZ(ifr.device1, argv[1]);
Manuel Novoa III cad53642003-03-19 09:13:01 +0000134 p = argv[2];
Glenn L McGrathb4f3d7f2003-02-08 23:11:19 +0000135
136 /* I suppose one could try to combine some of the function calls below,
137 * since ifr.u.flag, ifr.u.VID, and ifr.u.skb_priority are all same-sized
138 * (unsigned) int members of a unions. But because of the range checking,
Denys Vlasenko10ad6222017-04-17 16:13:32 +0200139 * doing so wouldn't save that much space and would also make maintenance
Denys Vlasenkofdd0b3b2012-01-16 04:00:37 +0100140 * more of a pain.
141 */
142 if (ifr.cmd == SET_VLAN_FLAG_CMD) {
143 /* set_flag */
144 ifr.u.flag = xatou_range(p, 0, 1);
Denis Vlasenko3038ac92006-09-30 19:37:25 +0000145 /* DM: in order to set reorder header, qos must be set */
Denys Vlasenkofdd0b3b2012-01-16 04:00:37 +0100146 ifr.vlan_qos = xatou_range(argv[3], 0, 7);
147 } else if (ifr.cmd == ADD_VLAN_CMD) {
148 /* add */
149 ifr.u.VID = xatou_range(p, 0, VLAN_GROUP_ARRAY_LEN - 1);
150 } else if (ifr.cmd != DEL_VLAN_CMD) {
151 /* set_{egress|ingress}_map */
Denis Vlasenko13858992006-10-08 12:49:22 +0000152 ifr.u.skb_priority = xatou(p);
Denys Vlasenkofdd0b3b2012-01-16 04:00:37 +0100153 ifr.vlan_qos = xatou_range(argv[3], 0, 7);
Glenn L McGrathb4f3d7f2003-02-08 23:11:19 +0000154 }
155 }
156
Rob Landleyd921b2e2006-08-03 15:41:12 +0000157 fd = xsocket(AF_INET, SOCK_STREAM, 0);
Denis Vlasenkofb79a2e2007-07-14 22:07:14 +0000158 ioctl_or_perror_and_die(fd, SIOCSIFVLAN, &ifr,
Denys Vlasenkofdd0b3b2012-01-16 04:00:37 +0100159 "ioctl error for %s", argv[0]);
Glenn L McGrathb4f3d7f2003-02-08 23:11:19 +0000160
161 return 0;
162}