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    Contents of /trunk/mkinitrd-magellan/busybox/networking/vconfig.c

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    Revision 532 - (show annotations) (download)
    Sat Sep 1 22:45:15 2007 UTC (16 years, 8 months ago) by niro
    File MIME type: text/plain
    File size: 4459 byte(s) 
    -import if magellan mkinitrd; it is a fork of redhats mkinitrd-5.0.8 with all magellan patches and features; deprecates magellan-src/mkinitrd
    1 /* vi: set sw=4 ts=4: */
    2 /*
    3 * vconfig implementation for busybox
    4 *
    5 * Copyright (C) 2001 Manuel Novoa III <mjn3@codepoet.org>
    6 *
    7 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
    8 */
    9
    10 /* BB_AUDIT SUSv3 N/A */
    11
    12 #include "busybox.h"
    13 #include <net/if.h>
    14
    15 /* Stuff from linux/if_vlan.h, kernel version 2.4.23 */
    16 enum vlan_ioctl_cmds {
    17 ADD_VLAN_CMD,
    18 DEL_VLAN_CMD,
    19 SET_VLAN_INGRESS_PRIORITY_CMD,
    20 SET_VLAN_EGRESS_PRIORITY_CMD,
    21 GET_VLAN_INGRESS_PRIORITY_CMD,
    22 GET_VLAN_EGRESS_PRIORITY_CMD,
    23 SET_VLAN_NAME_TYPE_CMD,
    24 SET_VLAN_FLAG_CMD
    25 };
    26 enum vlan_name_types {
    27 VLAN_NAME_TYPE_PLUS_VID, /* Name will look like: vlan0005 */
    28 VLAN_NAME_TYPE_RAW_PLUS_VID, /* name will look like: eth1.0005 */
    29 VLAN_NAME_TYPE_PLUS_VID_NO_PAD, /* Name will look like: vlan5 */
    30 VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD, /* Name will look like: eth0.5 */
    31 VLAN_NAME_TYPE_HIGHEST
    32 };
    33
    34 struct vlan_ioctl_args {
    35 int cmd; /* Should be one of the vlan_ioctl_cmds enum above. */
    36 char device1[24];
    37
    38 union {
    39 char device2[24];
    40 int VID;
    41 unsigned int skb_priority;
    42 unsigned int name_type;
    43 unsigned int bind_type;
    44 unsigned int flag; /* Matches vlan_dev_info flags */
    45 } u;
    46
    47 short vlan_qos;
    48 };
    49
    50 #define VLAN_GROUP_ARRAY_LEN 4096
    51 #define SIOCSIFVLAN 0x8983 /* Set 802.1Q VLAN options */
    52
    53 /* On entry, table points to the length of the current string plus
    54 * nul terminator plus data length for the subsequent entry. The
    55 * return value is the last data entry for the matching string. */
    56 static const char *xfind_str(const char *table, const char *str)
    57 {
    58 while (strcasecmp(str, table+1) != 0) {
    59 if (!*(table += table[0])) {
    60 bb_show_usage();
    61 }
    62 }
    63 return table - 1;
    64 }
    65
    66 static const char cmds[] = {
    67 4, ADD_VLAN_CMD, 7,
    68 'a', 'd', 'd', 0,
    69 3, DEL_VLAN_CMD, 7,
    70 'r', 'e', 'm', 0,
    71 3, SET_VLAN_NAME_TYPE_CMD, 17,
    72 's', 'e', 't', '_',
    73 'n', 'a', 'm', 'e', '_',
    74 't', 'y', 'p', 'e', 0,
    75 5, SET_VLAN_FLAG_CMD, 12,
    76 's', 'e', 't', '_',
    77 'f', 'l', 'a', 'g', 0,
    78 5, SET_VLAN_EGRESS_PRIORITY_CMD, 18,
    79 's', 'e', 't', '_',
    80 'e', 'g', 'r', 'e', 's', 's', '_',
    81 'm', 'a', 'p', 0,
    82 5, SET_VLAN_INGRESS_PRIORITY_CMD, 16,
    83 's', 'e', 't', '_',
    84 'i', 'n', 'g', 'r', 'e', 's', 's', '_',
    85 'm', 'a', 'p', 0,
    86 };
    87
    88 static const char name_types[] = {
    89 VLAN_NAME_TYPE_PLUS_VID, 16,
    90 'V', 'L', 'A', 'N',
    91 '_', 'P', 'L', 'U', 'S', '_', 'V', 'I', 'D',
    92 0,
    93 VLAN_NAME_TYPE_PLUS_VID_NO_PAD, 22,
    94 'V', 'L', 'A', 'N',
    95 '_', 'P', 'L', 'U', 'S', '_', 'V', 'I', 'D',
    96 '_', 'N', 'O', '_', 'P', 'A', 'D', 0,
    97 VLAN_NAME_TYPE_RAW_PLUS_VID, 15,
    98 'D', 'E', 'V',
    99 '_', 'P', 'L', 'U', 'S', '_', 'V', 'I', 'D',
    100 0,
    101 VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD, 20,
    102 'D', 'E', 'V',
    103 '_', 'P', 'L', 'U', 'S', '_', 'V', 'I', 'D',
    104 '_', 'N', 'O', '_', 'P', 'A', 'D', 0,
    105 };
    106
    107 static const char conf_file_name[] = "/proc/net/vlan/config";
    108
    109 int vconfig_main(int argc, char **argv)
    110 {
    111 struct vlan_ioctl_args ifr;
    112 const char *p;
    113 int fd;
    114
    115 if (argc < 3) {
    116 bb_show_usage();
    117 }
    118
    119 /* Don't bother closing the filedes. It will be closed on cleanup. */
    120 /* Will die if 802.1q is not present */
    121 xopen(conf_file_name, O_RDONLY);
    122
    123 memset(&ifr, 0, sizeof(struct vlan_ioctl_args));
    124
    125 ++argv;
    126 p = xfind_str(cmds+2, *argv);
    127 ifr.cmd = *p;
    128 if (argc != p[-1]) {
    129 bb_show_usage();
    130 }
    131
    132 if (ifr.cmd == SET_VLAN_NAME_TYPE_CMD) { /* set_name_type */
    133 ifr.u.name_type = *xfind_str(name_types+1, argv[1]);
    134 } else {
    135 if (strlen(argv[1]) >= IF_NAMESIZE) {
    136 bb_error_msg_and_die("if_name >= %d chars", IF_NAMESIZE);
    137 }
    138 strcpy(ifr.device1, argv[1]);
    139 p = argv[2];
    140
    141 /* I suppose one could try to combine some of the function calls below,
    142 * since ifr.u.flag, ifr.u.VID, and ifr.u.skb_priority are all same-sized
    143 * (unsigned) int members of a unions. But because of the range checking,
    144 * doing so wouldn't save that much space and would also make maintainence
    145 * more of a pain. */
    146 if (ifr.cmd == SET_VLAN_FLAG_CMD) { /* set_flag */
    147 ifr.u.flag = xatoul_range(p, 0, 1);
    148 /* DM: in order to set reorder header, qos must be set */
    149 ifr.vlan_qos = xatoul_range(argv[3], 0, 7);
    150 } else if (ifr.cmd == ADD_VLAN_CMD) { /* add */
    151 ifr.u.VID = xatoul_range(p, 0, VLAN_GROUP_ARRAY_LEN-1);
    152 } else if (ifr.cmd != DEL_VLAN_CMD) { /* set_{egress|ingress}_map */
    153 ifr.u.skb_priority = xatou(p);
    154 ifr.vlan_qos = xatoul_range(argv[3], 0, 7);
    155 }
    156 }
    157
    158 fd = xsocket(AF_INET, SOCK_STREAM, 0);
    159 if (ioctl(fd, SIOCSIFVLAN, &ifr) < 0) {
    160 bb_perror_msg_and_die("ioctl error for %s", *argv);
    161 }
    162
    163 return 0;
    164 }