blob: 924b2f00960f0c0a3c1c458950ffcbae38b4338a
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 */ |
27 | enum 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 | }; |
37 | enum 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 | |
45 | struct 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. */ |
67 | static 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 | |
77 | static 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 | |
92 | static 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 | |
103 | int vconfig_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
104 | int 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 | } |
154 |