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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 tarball for details.
*/
/* BB_AUDIT SUSv3 N/A */
#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 += table[0])) {
bb_show_usage();
}
}
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, 16,
'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, 20,
'D', 'E', 'V',
'_', 'P', 'L', 'U', 'S', '_', 'V', 'I', 'D',
'_', 'N', 'O', '_', 'P', 'A', 'D', 0,
};
static const char conf_file_name[] ALIGN1 = "/proc/net/vlan/config";
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;
if (argc < 3) {
bb_show_usage();
}
/* Don't bother closing the filedes. It will be closed on cleanup. */
/* Will die if 802.1q is not present */
xopen(conf_file_name, O_RDONLY);
memset(&ifr, 0, sizeof(struct vlan_ioctl_args));
++argv;
p = xfind_str(cmds+2, *argv);
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 {
if (strlen(argv[1]) >= IF_NAMESIZE) {
bb_error_msg_and_die("if_name >= %d chars", IF_NAMESIZE);
}
strcpy(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 maintainence
* more of a pain. */
if (ifr.cmd == SET_VLAN_FLAG_CMD) { /* set_flag */
ifr.u.flag = xatoul_range(p, 0, 1);
/* DM: in order to set reorder header, qos must be set */
ifr.vlan_qos = xatoul_range(argv[3], 0, 7);
} else if (ifr.cmd == ADD_VLAN_CMD) { /* add */
ifr.u.VID = xatoul_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 = xatoul_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);
return 0;
}
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