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/* vi: set sw=4 ts=4: */
/*
* vconfig implementation for busybox
*
* Copyright (C) 2001 Manuel Novoa III <mjn3@codepoet.org>
*
* Licensed under GPLv2 or later, see file LICENSE in this source tree.
*/
/* BB_AUDIT SUSv3 N/A */
//config:config VCONFIG
//config: bool "vconfig (2.5 kb)"
//config: default y
//config: select PLATFORM_LINUX
//config: help
//config: Creates, removes, and configures VLAN interfaces
//applet:IF_VCONFIG(APPLET_NOEXEC(vconfig, vconfig, BB_DIR_SBIN, BB_SUID_DROP, vconfig))
//kbuild:lib-$(CONFIG_VCONFIG) += vconfig.o
//usage:#define vconfig_trivial_usage
//usage: "COMMAND [OPTIONS]"
//usage:#define vconfig_full_usage "\n\n"
//usage: "Create and remove virtual ethernet devices\n"
//usage: "\n add IFACE VLAN_ID"
//usage: "\n rem VLAN_NAME"
//usage: "\n set_flag IFACE 0|1 VLAN_QOS"
//usage: "\n set_egress_map VLAN_NAME SKB_PRIO VLAN_QOS"
//usage: "\n set_ingress_map VLAN_NAME SKB_PRIO VLAN_QOS"
//usage: "\n set_name_type NAME_TYPE"
#include "libbb.h"
#include <net/if.h>
/* Stuff from linux/if_vlan.h, kernel version 2.4.23 */
enum vlan_ioctl_cmds {
ADD_VLAN_CMD,
DEL_VLAN_CMD,
SET_VLAN_INGRESS_PRIORITY_CMD,
SET_VLAN_EGRESS_PRIORITY_CMD,
GET_VLAN_INGRESS_PRIORITY_CMD,
GET_VLAN_EGRESS_PRIORITY_CMD,
SET_VLAN_NAME_TYPE_CMD,
SET_VLAN_FLAG_CMD
};
enum vlan_name_types {
VLAN_NAME_TYPE_PLUS_VID, /* Name will look like: vlan0005 */
VLAN_NAME_TYPE_RAW_PLUS_VID, /* name will look like: eth1.0005 */
VLAN_NAME_TYPE_PLUS_VID_NO_PAD, /* Name will look like: vlan5 */
VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD, /* Name will look like: eth0.5 */
VLAN_NAME_TYPE_HIGHEST
};
struct vlan_ioctl_args {
int cmd; /* Should be one of the vlan_ioctl_cmds enum above. */
char device1[24];
union {
char device2[24];
int VID;
unsigned int skb_priority;
unsigned int name_type;
unsigned int bind_type;
unsigned int flag; /* Matches vlan_dev_info flags */
} u;
short vlan_qos;
};
#define VLAN_GROUP_ARRAY_LEN 4096
#define SIOCSIFVLAN 0x8983 /* Set 802.1Q VLAN options */
/* On entry, table points to the length of the current string
* plus NUL terminator plus data length for the subsequent entry.
* The return value is the last data entry for the matching string. */
static const char *xfind_str(const char *table, const char *str)
{
while (strcasecmp(str, table + 1) != 0) {
if (!table[0])
bb_show_usage();
table += table[0];
}
return table - 1;
}
static const char cmds[] ALIGN1 = {
4, ADD_VLAN_CMD, 7,
'a','d','d',0,
3, DEL_VLAN_CMD, 7,
'r','e','m',0,
3, SET_VLAN_NAME_TYPE_CMD, 17,
's','e','t','_','n','a','m','e','_','t','y','p','e',0,
5, SET_VLAN_FLAG_CMD, 12,
's','e','t','_','f','l','a','g',0,
5, SET_VLAN_EGRESS_PRIORITY_CMD, 18,
's','e','t','_','e','g','r','e','s','s','_','m','a','p',0,
5, SET_VLAN_INGRESS_PRIORITY_CMD, 0,
's','e','t','_','i','n','g','r','e','s','s','_','m','a','p',0,
};
static const char name_types[] ALIGN1 = {
VLAN_NAME_TYPE_PLUS_VID, 16,
'V','L','A','N','_','P','L','U','S','_','V','I','D',0,
VLAN_NAME_TYPE_PLUS_VID_NO_PAD, 22,
'V','L','A','N','_','P','L','U','S','_','V','I','D','_','N','O','_','P','A','D',0,
VLAN_NAME_TYPE_RAW_PLUS_VID, 15,
'D','E','V','_','P','L','U','S','_','V','I','D',0,
VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD, 0,
'D','E','V','_','P','L','U','S','_','V','I','D','_','N','O','_','P','A','D',0,
};
int vconfig_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int vconfig_main(int argc, char **argv)
{
struct vlan_ioctl_args ifr;
const char *p;
int fd;
memset(&ifr, 0, sizeof(ifr));
++argv;
if (!argv[0])
bb_show_usage();
p = xfind_str(cmds + 2, argv[0]);
ifr.cmd = *p;
if (argc != p[-1])
bb_show_usage();
if (ifr.cmd == SET_VLAN_NAME_TYPE_CMD) {
/* set_name_type */
ifr.u.name_type = *xfind_str(name_types + 1, argv[1]);
} else {
strncpy_IFNAMSIZ(ifr.device1, argv[1]);
p = argv[2];
/* I suppose one could try to combine some of the function calls below,
* since ifr.u.flag, ifr.u.VID, and ifr.u.skb_priority are all same-sized
* (unsigned) int members of a unions. But because of the range checking,
* doing so wouldn't save that much space and would also make maintenance
* more of a pain.
*/
if (ifr.cmd == SET_VLAN_FLAG_CMD) {
/* set_flag */
ifr.u.flag = xatou_range(p, 0, 1);
/* DM: in order to set reorder header, qos must be set */
ifr.vlan_qos = xatou_range(argv[3], 0, 7);
} else if (ifr.cmd == ADD_VLAN_CMD) {
/* add */
ifr.u.VID = xatou_range(p, 0, VLAN_GROUP_ARRAY_LEN - 1);
} else if (ifr.cmd != DEL_VLAN_CMD) {
/* set_{egress|ingress}_map */
ifr.u.skb_priority = xatou(p);
ifr.vlan_qos = xatou_range(argv[3], 0, 7);
}
}
fd = xsocket(AF_INET, SOCK_STREAM, 0);
ioctl_or_perror_and_die(fd, SIOCSIFVLAN, &ifr,
"ioctl error for %s", argv[0]);
return 0;
}
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