source: branches/3.2/mindi-busybox/networking/vconfig.c @ 3232

Last change on this file since 3232 was 3232, checked in by bruno, 6 years ago
  • Update mindi-busybox to 1.21.1
File size: 4.4 KB
Line 
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 source tree.
8 */
9
10/* BB_AUDIT SUSv3 N/A */
11
12//usage:#define vconfig_trivial_usage
13//usage:       "COMMAND [OPTIONS]"
14//usage:#define vconfig_full_usage "\n\n"
15//usage:       "Create and remove virtual ethernet devices\n"
16//usage:     "\n    add     IFACE VLAN_ID"
17//usage:     "\n    rem     VLAN_NAME"
18//usage:     "\n    set_flag    IFACE 0|1 VLAN_QOS"
19//usage:     "\n    set_egress_map  VLAN_NAME SKB_PRIO VLAN_QOS"
20//usage:     "\n    set_ingress_map VLAN_NAME SKB_PRIO VLAN_QOS"
21//usage:     "\n    set_name_type   NAME_TYPE"
22
23#include "libbb.h"
24#include <net/if.h>
25
26/* Stuff from linux/if_vlan.h, kernel version 2.4.23 */
27enum vlan_ioctl_cmds {
28    ADD_VLAN_CMD,
29    DEL_VLAN_CMD,
30    SET_VLAN_INGRESS_PRIORITY_CMD,
31    SET_VLAN_EGRESS_PRIORITY_CMD,
32    GET_VLAN_INGRESS_PRIORITY_CMD,
33    GET_VLAN_EGRESS_PRIORITY_CMD,
34    SET_VLAN_NAME_TYPE_CMD,
35    SET_VLAN_FLAG_CMD
36};
37enum vlan_name_types {
38    VLAN_NAME_TYPE_PLUS_VID, /* Name will look like:  vlan0005 */
39    VLAN_NAME_TYPE_RAW_PLUS_VID, /* name will look like:  eth1.0005 */
40    VLAN_NAME_TYPE_PLUS_VID_NO_PAD, /* Name will look like:  vlan5 */
41    VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD, /* Name will look like:  eth0.5 */
42    VLAN_NAME_TYPE_HIGHEST
43};
44
45struct vlan_ioctl_args {
46    int cmd; /* Should be one of the vlan_ioctl_cmds enum above. */
47    char device1[24];
48
49    union {
50        char device2[24];
51        int VID;
52        unsigned int skb_priority;
53        unsigned int name_type;
54        unsigned int bind_type;
55        unsigned int flag; /* Matches vlan_dev_info flags */
56    } u;
57
58    short vlan_qos;
59};
60
61#define VLAN_GROUP_ARRAY_LEN  4096
62#define SIOCSIFVLAN           0x8983  /* Set 802.1Q VLAN options */
63
64/* On entry, table points to the length of the current string
65 * plus NUL terminator plus data length for the subsequent entry.
66 * The return value is the last data entry for the matching string. */
67static const char *xfind_str(const char *table, const char *str)
68{
69    while (strcasecmp(str, table + 1) != 0) {
70        if (!table[0])
71            bb_show_usage();
72        table += table[0];
73    }
74    return table - 1;
75}
76
77static const char cmds[] ALIGN1 = {
78    4, ADD_VLAN_CMD, 7,
79    'a','d','d',0,
80    3, DEL_VLAN_CMD, 7,
81    'r','e','m',0,
82    3, SET_VLAN_NAME_TYPE_CMD, 17,
83    's','e','t','_','n','a','m','e','_','t','y','p','e',0,
84    5, SET_VLAN_FLAG_CMD, 12,
85    's','e','t','_','f','l','a','g',0,
86    5, SET_VLAN_EGRESS_PRIORITY_CMD, 18,
87    's','e','t','_','e','g','r','e','s','s','_','m','a','p',0,
88    5, SET_VLAN_INGRESS_PRIORITY_CMD, 0,
89    's','e','t','_','i','n','g','r','e','s','s','_','m','a','p',0,
90};
91
92static const char name_types[] ALIGN1 = {
93    VLAN_NAME_TYPE_PLUS_VID, 16,
94    'V','L','A','N','_','P','L','U','S','_','V','I','D',0,
95    VLAN_NAME_TYPE_PLUS_VID_NO_PAD, 22,
96    'V','L','A','N','_','P','L','U','S','_','V','I','D','_','N','O','_','P','A','D',0,
97    VLAN_NAME_TYPE_RAW_PLUS_VID, 15,
98    'D','E','V','_','P','L','U','S','_','V','I','D',0,
99    VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD, 0,
100    'D','E','V','_','P','L','U','S','_','V','I','D','_','N','O','_','P','A','D',0,
101};
102
103int vconfig_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
104int vconfig_main(int argc, char **argv)
105{
106    struct vlan_ioctl_args ifr;
107    const char *p;
108    int fd;
109
110    memset(&ifr, 0, sizeof(ifr));
111
112    ++argv;
113    if (!argv[0])
114        bb_show_usage();
115    p = xfind_str(cmds + 2, argv[0]);
116    ifr.cmd = *p;
117    if (argc != p[-1])
118        bb_show_usage();
119
120    if (ifr.cmd == SET_VLAN_NAME_TYPE_CMD) {
121        /* set_name_type */
122        ifr.u.name_type = *xfind_str(name_types + 1, argv[1]);
123    } else {
124        strncpy_IFNAMSIZ(ifr.device1, argv[1]);
125        p = argv[2];
126
127        /* I suppose one could try to combine some of the function calls below,
128         * since ifr.u.flag, ifr.u.VID, and ifr.u.skb_priority are all same-sized
129         * (unsigned) int members of a unions.  But because of the range checking,
130         * doing so wouldn't save that much space and would also make maintainence
131         * more of a pain.
132         */
133        if (ifr.cmd == SET_VLAN_FLAG_CMD) {
134            /* set_flag */
135            ifr.u.flag = xatou_range(p, 0, 1);
136            /* DM: in order to set reorder header, qos must be set */
137            ifr.vlan_qos = xatou_range(argv[3], 0, 7);
138        } else if (ifr.cmd == ADD_VLAN_CMD) {
139            /* add */
140            ifr.u.VID = xatou_range(p, 0, VLAN_GROUP_ARRAY_LEN - 1);
141        } else if (ifr.cmd != DEL_VLAN_CMD) {
142            /* set_{egress|ingress}_map */
143            ifr.u.skb_priority = xatou(p);
144            ifr.vlan_qos = xatou_range(argv[3], 0, 7);
145        }
146    }
147
148    fd = xsocket(AF_INET, SOCK_STREAM, 0);
149    ioctl_or_perror_and_die(fd, SIOCSIFVLAN, &ifr,
150                        "ioctl error for %s", argv[0]);
151
152    return 0;
153}
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