Contents of /tags/mkinitrd-6_1_11/busybox/networking/vconfig.c
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Wed Oct 28 13:31:19 2009 UTC (14 years, 11 months ago) by niro
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Wed Oct 28 13:31:19 2009 UTC (14 years, 11 months ago) by niro
File MIME type: text/plain
File size: 4435 byte(s)
tagged 'mkinitrd-6_1_11'
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 "libbb.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[] ALIGN1 = { |
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[] ALIGN1 = { |
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[] ALIGN1 = "/proc/net/vlan/config"; |
108 | |
109 | int vconfig_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
110 | int vconfig_main(int argc, char **argv) |
111 | { |
112 | struct vlan_ioctl_args ifr; |
113 | const char *p; |
114 | int fd; |
115 | |
116 | if (argc < 3) { |
117 | bb_show_usage(); |
118 | } |
119 | |
120 | /* Don't bother closing the filedes. It will be closed on cleanup. */ |
121 | /* Will die if 802.1q is not present */ |
122 | xopen(conf_file_name, O_RDONLY); |
123 | |
124 | memset(&ifr, 0, sizeof(struct vlan_ioctl_args)); |
125 | |
126 | ++argv; |
127 | p = xfind_str(cmds+2, *argv); |
128 | ifr.cmd = *p; |
129 | if (argc != p[-1]) { |
130 | bb_show_usage(); |
131 | } |
132 | |
133 | if (ifr.cmd == SET_VLAN_NAME_TYPE_CMD) { /* set_name_type */ |
134 | ifr.u.name_type = *xfind_str(name_types+1, argv[1]); |
135 | } else { |
136 | strncpy(ifr.device1, argv[1], IFNAMSIZ); |
137 | p = argv[2]; |
138 | |
139 | /* I suppose one could try to combine some of the function calls below, |
140 | * since ifr.u.flag, ifr.u.VID, and ifr.u.skb_priority are all same-sized |
141 | * (unsigned) int members of a unions. But because of the range checking, |
142 | * doing so wouldn't save that much space and would also make maintainence |
143 | * more of a pain. */ |
144 | if (ifr.cmd == SET_VLAN_FLAG_CMD) { /* set_flag */ |
145 | ifr.u.flag = xatoul_range(p, 0, 1); |
146 | /* DM: in order to set reorder header, qos must be set */ |
147 | ifr.vlan_qos = xatoul_range(argv[3], 0, 7); |
148 | } else if (ifr.cmd == ADD_VLAN_CMD) { /* add */ |
149 | ifr.u.VID = xatoul_range(p, 0, VLAN_GROUP_ARRAY_LEN-1); |
150 | } else if (ifr.cmd != DEL_VLAN_CMD) { /* set_{egress|ingress}_map */ |
151 | ifr.u.skb_priority = xatou(p); |
152 | ifr.vlan_qos = xatoul_range(argv[3], 0, 7); |
153 | } |
154 | } |
155 | |
156 | fd = xsocket(AF_INET, SOCK_STREAM, 0); |
157 | ioctl_or_perror_and_die(fd, SIOCSIFVLAN, &ifr, |
158 | "ioctl error for %s", *argv); |
159 | |
160 | return 0; |
161 | } |