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166 lines
4.4 KiB
C
166 lines
4.4 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* vconfig implementation for busybox
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*
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* Copyright (C) 2001 Manuel Novoa III <mjn3@codepoet.org>
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*
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* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
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*/
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/* BB_AUDIT SUSv3 N/A */
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#include "busybox.h"
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#include <net/if.h>
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/* Stuff from linux/if_vlan.h, kernel version 2.4.23 */
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enum vlan_ioctl_cmds {
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ADD_VLAN_CMD,
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DEL_VLAN_CMD,
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SET_VLAN_INGRESS_PRIORITY_CMD,
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SET_VLAN_EGRESS_PRIORITY_CMD,
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GET_VLAN_INGRESS_PRIORITY_CMD,
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GET_VLAN_EGRESS_PRIORITY_CMD,
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SET_VLAN_NAME_TYPE_CMD,
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SET_VLAN_FLAG_CMD
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};
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enum vlan_name_types {
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VLAN_NAME_TYPE_PLUS_VID, /* Name will look like: vlan0005 */
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VLAN_NAME_TYPE_RAW_PLUS_VID, /* name will look like: eth1.0005 */
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VLAN_NAME_TYPE_PLUS_VID_NO_PAD, /* Name will look like: vlan5 */
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VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD, /* Name will look like: eth0.5 */
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VLAN_NAME_TYPE_HIGHEST
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};
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struct vlan_ioctl_args {
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int cmd; /* Should be one of the vlan_ioctl_cmds enum above. */
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char device1[24];
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union {
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char device2[24];
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int VID;
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unsigned int skb_priority;
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unsigned int name_type;
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unsigned int bind_type;
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unsigned int flag; /* Matches vlan_dev_info flags */
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} u;
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short vlan_qos;
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};
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#define VLAN_GROUP_ARRAY_LEN 4096
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#define SIOCSIFVLAN 0x8983 /* Set 802.1Q VLAN options */
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/* On entry, table points to the length of the current string plus
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* nul terminator plus data length for the subsequent entry. The
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* return value is the last data entry for the matching string. */
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static const char *xfind_str(const char *table, const char *str)
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{
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while (strcasecmp(str, table+1) != 0) {
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if (!*(table += table[0])) {
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bb_show_usage();
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}
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}
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return table - 1;
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}
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static const char cmds[] = {
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4, ADD_VLAN_CMD, 7,
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'a', 'd', 'd', 0,
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3, DEL_VLAN_CMD, 7,
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'r', 'e', 'm', 0,
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3, SET_VLAN_NAME_TYPE_CMD, 17,
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's', 'e', 't', '_',
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'n', 'a', 'm', 'e', '_',
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't', 'y', 'p', 'e', 0,
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5, SET_VLAN_FLAG_CMD, 12,
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's', 'e', 't', '_',
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'f', 'l', 'a', 'g', 0,
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5, SET_VLAN_EGRESS_PRIORITY_CMD, 18,
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's', 'e', 't', '_',
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'e', 'g', 'r', 'e', 's', 's', '_',
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'm', 'a', 'p', 0,
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5, SET_VLAN_INGRESS_PRIORITY_CMD, 16,
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's', 'e', 't', '_',
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'i', 'n', 'g', 'r', 'e', 's', 's', '_',
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'm', 'a', 'p', 0,
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};
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static const char name_types[] = {
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VLAN_NAME_TYPE_PLUS_VID, 16,
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'V', 'L', 'A', 'N',
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'_', 'P', 'L', 'U', 'S', '_', 'V', 'I', 'D',
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0,
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VLAN_NAME_TYPE_PLUS_VID_NO_PAD, 22,
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'V', 'L', 'A', 'N',
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'_', 'P', 'L', 'U', 'S', '_', 'V', 'I', 'D',
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'_', 'N', 'O', '_', 'P', 'A', 'D', 0,
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VLAN_NAME_TYPE_RAW_PLUS_VID, 15,
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'D', 'E', 'V',
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'_', 'P', 'L', 'U', 'S', '_', 'V', 'I', 'D',
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0,
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VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD, 20,
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'D', 'E', 'V',
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'_', 'P', 'L', 'U', 'S', '_', 'V', 'I', 'D',
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'_', 'N', 'O', '_', 'P', 'A', 'D', 0,
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};
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static const char conf_file_name[] = "/proc/net/vlan/config";
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int vconfig_main(int argc, char **argv);
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int vconfig_main(int argc, char **argv)
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{
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struct vlan_ioctl_args ifr;
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const char *p;
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int fd;
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if (argc < 3) {
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bb_show_usage();
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}
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/* Don't bother closing the filedes. It will be closed on cleanup. */
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/* Will die if 802.1q is not present */
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xopen(conf_file_name, O_RDONLY);
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memset(&ifr, 0, sizeof(struct vlan_ioctl_args));
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++argv;
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p = xfind_str(cmds+2, *argv);
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ifr.cmd = *p;
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if (argc != p[-1]) {
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bb_show_usage();
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}
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if (ifr.cmd == SET_VLAN_NAME_TYPE_CMD) { /* set_name_type */
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ifr.u.name_type = *xfind_str(name_types+1, argv[1]);
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} else {
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if (strlen(argv[1]) >= IF_NAMESIZE) {
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bb_error_msg_and_die("if_name >= %d chars", IF_NAMESIZE);
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}
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strcpy(ifr.device1, argv[1]);
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p = argv[2];
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/* I suppose one could try to combine some of the function calls below,
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* since ifr.u.flag, ifr.u.VID, and ifr.u.skb_priority are all same-sized
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* (unsigned) int members of a unions. But because of the range checking,
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* doing so wouldn't save that much space and would also make maintainence
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* more of a pain. */
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if (ifr.cmd == SET_VLAN_FLAG_CMD) { /* set_flag */
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ifr.u.flag = xatoul_range(p, 0, 1);
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/* DM: in order to set reorder header, qos must be set */
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ifr.vlan_qos = xatoul_range(argv[3], 0, 7);
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} else if (ifr.cmd == ADD_VLAN_CMD) { /* add */
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ifr.u.VID = xatoul_range(p, 0, VLAN_GROUP_ARRAY_LEN-1);
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} else if (ifr.cmd != DEL_VLAN_CMD) { /* set_{egress|ingress}_map */
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ifr.u.skb_priority = xatou(p);
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ifr.vlan_qos = xatoul_range(argv[3], 0, 7);
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}
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}
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fd = xsocket(AF_INET, SOCK_STREAM, 0);
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if (ioctl(fd, SIOCSIFVLAN, &ifr) < 0) {
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bb_perror_msg_and_die("ioctl error for %s", *argv);
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}
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return 0;
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}
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