[821] | 1 | /* vi: set sw=4 ts=4: */
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| 2 | /*
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| 3 | * vconfig implementation for busybox
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| 4 | *
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| 5 | * Copyright (C) 2001 Manuel Novoa III <mjn3@codepoet.org>
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| 6 | *
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| 7 | * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
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| 8 | */
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| 9 |
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| 10 | /* BB_AUDIT SUSv3 N/A */
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| 11 |
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| 12 | #include <stdlib.h>
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| 13 | #include <unistd.h>
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| 14 | #include <fcntl.h>
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| 15 | #include <sys/ioctl.h>
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| 16 | #include <net/if.h>
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| 17 | #include <string.h>
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| 18 | #include <limits.h>
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| 19 | #include "busybox.h"
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| 20 |
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| 21 | /* Stuff from linux/if_vlan.h, kernel version 2.4.23 */
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| 22 | enum vlan_ioctl_cmds {
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| 23 | ADD_VLAN_CMD,
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| 24 | DEL_VLAN_CMD,
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| 25 | SET_VLAN_INGRESS_PRIORITY_CMD,
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| 26 | SET_VLAN_EGRESS_PRIORITY_CMD,
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| 27 | GET_VLAN_INGRESS_PRIORITY_CMD,
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| 28 | GET_VLAN_EGRESS_PRIORITY_CMD,
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| 29 | SET_VLAN_NAME_TYPE_CMD,
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| 30 | SET_VLAN_FLAG_CMD
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| 31 | };
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| 32 | enum vlan_name_types {
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| 33 | VLAN_NAME_TYPE_PLUS_VID, /* Name will look like: vlan0005 */
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| 34 | VLAN_NAME_TYPE_RAW_PLUS_VID, /* name will look like: eth1.0005 */
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| 35 | VLAN_NAME_TYPE_PLUS_VID_NO_PAD, /* Name will look like: vlan5 */
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| 36 | VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD, /* Name will look like: eth0.5 */
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| 37 | VLAN_NAME_TYPE_HIGHEST
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| 38 | };
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| 39 |
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| 40 | struct vlan_ioctl_args {
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| 41 | int cmd; /* Should be one of the vlan_ioctl_cmds enum above. */
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| 42 | char device1[24];
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| 43 |
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| 44 | union {
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| 45 | char device2[24];
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| 46 | int VID;
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| 47 | unsigned int skb_priority;
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| 48 | unsigned int name_type;
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| 49 | unsigned int bind_type;
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| 50 | unsigned int flag; /* Matches vlan_dev_info flags */
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| 51 | } u;
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| 52 |
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| 53 | short vlan_qos;
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| 54 | };
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| 55 |
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| 56 | #define VLAN_GROUP_ARRAY_LEN 4096
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| 57 | #define SIOCSIFVLAN 0x8983 /* Set 802.1Q VLAN options */
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| 58 |
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| 59 | /* On entry, table points to the length of the current string plus
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| 60 | * nul terminator plus data length for the subsequent entry. The
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| 61 | * return value is the last data entry for the matching string. */
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| 62 | static const char *xfind_str(const char *table, const char *str)
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| 63 | {
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| 64 | while (strcasecmp(str, table+1) != 0) {
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| 65 | if (!*(table += table[0])) {
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| 66 | bb_show_usage();
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| 67 | }
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| 68 | }
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| 69 | return table - 1;
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| 70 | }
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| 71 |
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| 72 | static const char cmds[] = {
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| 73 | 4, ADD_VLAN_CMD, 7,
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| 74 | 'a', 'd', 'd', 0,
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| 75 | 3, DEL_VLAN_CMD, 7,
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| 76 | 'r', 'e', 'm', 0,
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| 77 | 3, SET_VLAN_NAME_TYPE_CMD, 17,
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| 78 | 's', 'e', 't', '_',
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| 79 | 'n', 'a', 'm', 'e', '_',
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| 80 | 't', 'y', 'p', 'e', 0,
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| 81 | 4, SET_VLAN_FLAG_CMD, 12,
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| 82 | 's', 'e', 't', '_',
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| 83 | 'f', 'l', 'a', 'g', 0,
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| 84 | 5, SET_VLAN_EGRESS_PRIORITY_CMD, 18,
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| 85 | 's', 'e', 't', '_',
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| 86 | 'e', 'g', 'r', 'e', 's', 's', '_',
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| 87 | 'm', 'a', 'p', 0,
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| 88 | 5, SET_VLAN_INGRESS_PRIORITY_CMD, 16,
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| 89 | 's', 'e', 't', '_',
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| 90 | 'i', 'n', 'g', 'r', 'e', 's', 's', '_',
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| 91 | 'm', 'a', 'p', 0,
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| 92 | };
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| 93 |
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| 94 | static const char name_types[] = {
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| 95 | VLAN_NAME_TYPE_PLUS_VID, 16,
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| 96 | 'V', 'L', 'A', 'N',
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| 97 | '_', 'P', 'L', 'U', 'S', '_', 'V', 'I', 'D',
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| 98 | 0,
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| 99 | VLAN_NAME_TYPE_PLUS_VID_NO_PAD, 22,
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| 100 | 'V', 'L', 'A', 'N',
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| 101 | '_', 'P', 'L', 'U', 'S', '_', 'V', 'I', 'D',
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| 102 | '_', 'N', 'O', '_', 'P', 'A', 'D', 0,
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| 103 | VLAN_NAME_TYPE_RAW_PLUS_VID, 15,
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| 104 | 'D', 'E', 'V',
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| 105 | '_', 'P', 'L', 'U', 'S', '_', 'V', 'I', 'D',
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| 106 | 0,
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| 107 | VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD, 20,
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| 108 | 'D', 'E', 'V',
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| 109 | '_', 'P', 'L', 'U', 'S', '_', 'V', 'I', 'D',
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| 110 | '_', 'N', 'O', '_', 'P', 'A', 'D', 0,
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| 111 | };
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| 112 |
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| 113 | static const char conf_file_name[] = "/proc/net/vlan/config";
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| 114 |
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| 115 | int vconfig_main(int argc, char **argv)
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| 116 | {
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| 117 | struct vlan_ioctl_args ifr;
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| 118 | const char *p;
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| 119 | int fd;
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| 120 |
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| 121 | if (argc < 3) {
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| 122 | bb_show_usage();
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| 123 | }
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| 124 |
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| 125 | /* Don't bother closing the filedes. It will be closed on cleanup. */
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| 126 | /* Will die if 802.1q is not present */
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| 127 | bb_xopen3(conf_file_name, O_RDONLY, 0);
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| 128 |
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| 129 | memset(&ifr, 0, sizeof(struct vlan_ioctl_args));
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| 130 |
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| 131 | ++argv;
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| 132 | p = xfind_str(cmds+2, *argv);
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| 133 | ifr.cmd = *p;
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| 134 | if (argc != p[-1]) {
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| 135 | bb_show_usage();
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| 136 | }
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| 137 |
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| 138 | if (ifr.cmd == SET_VLAN_NAME_TYPE_CMD) { /* set_name_type */
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| 139 | ifr.u.name_type = *xfind_str(name_types+1, argv[1]);
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| 140 | } else {
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| 141 | if (strlen(argv[1]) >= IF_NAMESIZE) {
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| 142 | bb_error_msg_and_die("if_name >= %d chars\n", IF_NAMESIZE);
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| 143 | }
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| 144 | strcpy(ifr.device1, argv[1]);
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| 145 | p = argv[2];
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| 146 |
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| 147 | /* I suppose one could try to combine some of the function calls below,
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| 148 | * since ifr.u.flag, ifr.u.VID, and ifr.u.skb_priority are all same-sized
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| 149 | * (unsigned) int members of a unions. But because of the range checking,
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| 150 | * doing so wouldn't save that much space and would also make maintainence
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| 151 | * more of a pain. */
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| 152 | if (ifr.cmd == SET_VLAN_FLAG_CMD) { /* set_flag */
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| 153 | ifr.u.flag = bb_xgetularg10_bnd(p, 0, 1);
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| 154 | } else if (ifr.cmd == ADD_VLAN_CMD) { /* add */
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| 155 | ifr.u.VID = bb_xgetularg10_bnd(p, 0, VLAN_GROUP_ARRAY_LEN-1);
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| 156 | } else if (ifr.cmd != DEL_VLAN_CMD) { /* set_{egress|ingress}_map */
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| 157 | ifr.u.skb_priority = bb_xgetularg10_bnd(p, 0, ULONG_MAX);
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| 158 | ifr.vlan_qos = bb_xgetularg10_bnd(argv[3], 0, 7);
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| 159 | }
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| 160 | }
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| 161 |
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| 162 | fd = bb_xsocket(AF_INET, SOCK_STREAM, 0);
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| 163 | if (ioctl(fd, SIOCSIFVLAN, &ifr) < 0) {
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| 164 | bb_perror_msg_and_die("ioctl error for %s", *argv);
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| 165 | }
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| 166 |
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| 167 | return 0;
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| 168 | }
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| 169 |
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