Annotation of /trunk/mkinitrd-magellan/busybox/networking/brctl.c
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Revision 816 -
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Fri Apr 24 18:33:46 2009 UTC (15 years, 1 month ago) by niro
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File size: 7209 byte(s)
Fri Apr 24 18:33:46 2009 UTC (15 years, 1 month ago) by niro
File MIME type: text/plain
File size: 7209 byte(s)
-updated to busybox-1.13.4
1 | niro | 816 | /* vi: set sw=4 ts=4: */ |
2 | /* | ||
3 | * Small implementation of brctl for busybox. | ||
4 | * | ||
5 | * Copyright (C) 2008 by Bernhard Reutner-Fischer | ||
6 | * | ||
7 | * Some helper functions from bridge-utils are | ||
8 | * Copyright (C) 2000 Lennert Buytenhek | ||
9 | * | ||
10 | * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. | ||
11 | */ | ||
12 | /* This applet currently uses only the ioctl interface and no sysfs at all. | ||
13 | * At the time of this writing this was considered a feature. | ||
14 | */ | ||
15 | #include "libbb.h" | ||
16 | #include <linux/sockios.h> | ||
17 | #include <net/if.h> | ||
18 | |||
19 | /* Maximum number of ports supported per bridge interface. */ | ||
20 | #ifndef MAX_PORTS | ||
21 | #define MAX_PORTS 32 | ||
22 | #endif | ||
23 | |||
24 | /* Use internal number parsing and not the "exact" conversion. */ | ||
25 | /* #define BRCTL_USE_INTERNAL 0 */ /* use exact conversion */ | ||
26 | #define BRCTL_USE_INTERNAL 1 | ||
27 | |||
28 | #if ENABLE_FEATURE_BRCTL_FANCY | ||
29 | #include <linux/if_bridge.h> | ||
30 | |||
31 | /* FIXME: These 4 funcs are not really clean and could be improved */ | ||
32 | static ALWAYS_INLINE void strtotimeval(struct timeval *tv, | ||
33 | const char *time_str) | ||
34 | { | ||
35 | double secs; | ||
36 | #if BRCTL_USE_INTERNAL | ||
37 | secs = /*bb_*/strtod(time_str, NULL); | ||
38 | if (!secs) | ||
39 | #else | ||
40 | if (sscanf(time_str, "%lf", &secs) != 1) | ||
41 | #endif | ||
42 | bb_error_msg_and_die (bb_msg_invalid_arg, time_str, "timespec"); | ||
43 | tv->tv_sec = secs; | ||
44 | tv->tv_usec = 1000000 * (secs - tv->tv_sec); | ||
45 | } | ||
46 | |||
47 | static ALWAYS_INLINE unsigned long __tv_to_jiffies(const struct timeval *tv) | ||
48 | { | ||
49 | unsigned long long jif; | ||
50 | |||
51 | jif = 1000000ULL * tv->tv_sec + tv->tv_usec; | ||
52 | |||
53 | return jif/10000; | ||
54 | } | ||
55 | # if 0 | ||
56 | static void __jiffies_to_tv(struct timeval *tv, unsigned long jiffies) | ||
57 | { | ||
58 | unsigned long long tvusec; | ||
59 | |||
60 | tvusec = 10000ULL*jiffies; | ||
61 | tv->tv_sec = tvusec/1000000; | ||
62 | tv->tv_usec = tvusec - 1000000 * tv->tv_sec; | ||
63 | } | ||
64 | # endif | ||
65 | static unsigned long str_to_jiffies(const char *time_str) | ||
66 | { | ||
67 | struct timeval tv; | ||
68 | strtotimeval(&tv, time_str); | ||
69 | return __tv_to_jiffies(&tv); | ||
70 | } | ||
71 | |||
72 | static void arm_ioctl(unsigned long *args, | ||
73 | unsigned long arg0, unsigned long arg1, unsigned long arg2) | ||
74 | { | ||
75 | args[0] = arg0; | ||
76 | args[1] = arg1; | ||
77 | args[2] = arg2; | ||
78 | args[3] = 0; | ||
79 | } | ||
80 | #endif | ||
81 | |||
82 | |||
83 | int brctl_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; | ||
84 | int brctl_main(int argc UNUSED_PARAM, char **argv) | ||
85 | { | ||
86 | static const char keywords[] ALIGN1 = | ||
87 | "addbr\0" "delbr\0" "addif\0" "delif\0" | ||
88 | USE_FEATURE_BRCTL_FANCY( | ||
89 | "stp\0" | ||
90 | "setageing\0" "setfd\0" "sethello\0" "setmaxage\0" | ||
91 | "setpathcost\0" "setportprio\0" "setbridgeprio\0" | ||
92 | ) | ||
93 | USE_FEATURE_BRCTL_SHOW("showmacs\0" "show\0"); | ||
94 | |||
95 | enum { ARG_addbr = 0, ARG_delbr, ARG_addif, ARG_delif | ||
96 | USE_FEATURE_BRCTL_FANCY(, | ||
97 | ARG_stp, | ||
98 | ARG_setageing, ARG_setfd, ARG_sethello, ARG_setmaxage, | ||
99 | ARG_setpathcost, ARG_setportprio, ARG_setbridgeprio | ||
100 | ) | ||
101 | USE_FEATURE_BRCTL_SHOW(, ARG_showmacs, ARG_show) | ||
102 | }; | ||
103 | |||
104 | int fd; | ||
105 | smallint key; | ||
106 | struct ifreq ifr; | ||
107 | char *br, *brif; | ||
108 | |||
109 | argv++; | ||
110 | while (*argv) { | ||
111 | #if ENABLE_FEATURE_BRCTL_FANCY | ||
112 | int ifidx[MAX_PORTS]; | ||
113 | unsigned long args[4]; | ||
114 | ifr.ifr_data = (char *) &args; | ||
115 | #endif | ||
116 | |||
117 | key = index_in_strings(keywords, *argv); | ||
118 | if (key == -1) /* no match found in keywords array, bail out. */ | ||
119 | bb_error_msg_and_die(bb_msg_invalid_arg, *argv, applet_name); | ||
120 | argv++; | ||
121 | fd = xsocket(AF_INET, SOCK_STREAM, 0); | ||
122 | |||
123 | #if ENABLE_FEATURE_BRCTL_SHOW | ||
124 | if (key == ARG_show) { /* show */ | ||
125 | char brname[IFNAMSIZ]; | ||
126 | int bridx[MAX_PORTS]; | ||
127 | int i, num; | ||
128 | arm_ioctl(args, BRCTL_GET_BRIDGES, | ||
129 | (unsigned long) bridx, MAX_PORTS); | ||
130 | num = xioctl(fd, SIOCGIFBR, args); | ||
131 | printf("bridge name\tbridge id\t\tSTP enabled\tinterfaces\n"); | ||
132 | for (i = 0; i < num; i++) { | ||
133 | char ifname[IFNAMSIZ]; | ||
134 | int j, tabs; | ||
135 | struct __bridge_info bi; | ||
136 | unsigned char *x; | ||
137 | |||
138 | if (!if_indextoname(bridx[i], brname)) | ||
139 | bb_perror_msg_and_die("can't get bridge name for index %d", i); | ||
140 | strncpy(ifr.ifr_name, brname, IFNAMSIZ); | ||
141 | |||
142 | arm_ioctl(args, BRCTL_GET_BRIDGE_INFO, | ||
143 | (unsigned long) &bi, 0); | ||
144 | xioctl(fd, SIOCDEVPRIVATE, &ifr); | ||
145 | printf("%s\t\t", brname); | ||
146 | |||
147 | /* print bridge id */ | ||
148 | x = (unsigned char *) &bi.bridge_id; | ||
149 | for (j = 0; j < 8; j++) { | ||
150 | printf("%.2x", x[j]); | ||
151 | if (j == 1) | ||
152 | bb_putchar('.'); | ||
153 | } | ||
154 | printf(bi.stp_enabled ? "\tyes" : "\tno"); | ||
155 | |||
156 | /* print interface list */ | ||
157 | arm_ioctl(args, BRCTL_GET_PORT_LIST, | ||
158 | (unsigned long) ifidx, MAX_PORTS); | ||
159 | xioctl(fd, SIOCDEVPRIVATE, &ifr); | ||
160 | tabs = 0; | ||
161 | for (j = 0; j < MAX_PORTS; j++) { | ||
162 | if (!ifidx[j]) | ||
163 | continue; | ||
164 | if (!if_indextoname(ifidx[j], ifname)) | ||
165 | bb_perror_msg_and_die("can't get interface name for index %d", j); | ||
166 | if (tabs) | ||
167 | printf("\t\t\t\t\t"); | ||
168 | else | ||
169 | tabs = 1; | ||
170 | printf("\t\t%s\n", ifname); | ||
171 | } | ||
172 | if (!tabs) /* bridge has no interfaces */ | ||
173 | bb_putchar('\n'); | ||
174 | } | ||
175 | goto done; | ||
176 | } | ||
177 | #endif | ||
178 | |||
179 | if (!*argv) /* all but 'show' need at least one argument */ | ||
180 | bb_show_usage(); | ||
181 | |||
182 | br = *argv++; | ||
183 | |||
184 | if (key == ARG_addbr || key == ARG_delbr) { /* addbr or delbr */ | ||
185 | ioctl_or_perror_and_die(fd, | ||
186 | key == ARG_addbr ? SIOCBRADDBR : SIOCBRDELBR, | ||
187 | br, "bridge %s", br); | ||
188 | goto done; | ||
189 | } | ||
190 | |||
191 | if (!*argv) /* all but 'addif/delif' need at least two arguments */ | ||
192 | bb_show_usage(); | ||
193 | |||
194 | strncpy(ifr.ifr_name, br, IFNAMSIZ); | ||
195 | if (key == ARG_addif || key == ARG_delif) { /* addif or delif */ | ||
196 | brif = *argv; | ||
197 | ifr.ifr_ifindex = if_nametoindex(brif); | ||
198 | if (!ifr.ifr_ifindex) { | ||
199 | bb_perror_msg_and_die("iface %s", brif); | ||
200 | } | ||
201 | ioctl_or_perror_and_die(fd, | ||
202 | key == ARG_addif ? SIOCBRADDIF : SIOCBRDELIF, | ||
203 | &ifr, "bridge %s", br); | ||
204 | goto done_next_argv; | ||
205 | } | ||
206 | #if ENABLE_FEATURE_BRCTL_FANCY | ||
207 | if (key == ARG_stp) { /* stp */ | ||
208 | /* FIXME: parsing yes/y/on/1 versus no/n/off/0 is too involved */ | ||
209 | arm_ioctl(args, BRCTL_SET_BRIDGE_STP_STATE, | ||
210 | (unsigned)(**argv - '0'), 0); | ||
211 | goto fire; | ||
212 | } | ||
213 | if ((unsigned)(key - ARG_setageing) < 4) { /* time related ops */ | ||
214 | static const uint8_t ops[] ALIGN1 = { | ||
215 | BRCTL_SET_AGEING_TIME, /* ARG_setageing */ | ||
216 | BRCTL_SET_BRIDGE_FORWARD_DELAY, /* ARG_setfd */ | ||
217 | BRCTL_SET_BRIDGE_HELLO_TIME, /* ARG_sethello */ | ||
218 | BRCTL_SET_BRIDGE_MAX_AGE /* ARG_setmaxage */ | ||
219 | }; | ||
220 | arm_ioctl(args, ops[key - ARG_setageing], str_to_jiffies(*argv), 0); | ||
221 | goto fire; | ||
222 | } | ||
223 | if (key == ARG_setpathcost | ||
224 | || key == ARG_setportprio | ||
225 | || key == ARG_setbridgeprio | ||
226 | ) { | ||
227 | static const uint8_t ops[] ALIGN1 = { | ||
228 | BRCTL_SET_PATH_COST, /* ARG_setpathcost */ | ||
229 | BRCTL_SET_PORT_PRIORITY, /* ARG_setportprio */ | ||
230 | BRCTL_SET_BRIDGE_PRIORITY /* ARG_setbridgeprio */ | ||
231 | }; | ||
232 | int port = -1; | ||
233 | unsigned arg1, arg2; | ||
234 | |||
235 | if (key != ARG_setbridgeprio) { | ||
236 | /* get portnum */ | ||
237 | unsigned i; | ||
238 | |||
239 | port = if_nametoindex(*argv++); | ||
240 | if (!port) | ||
241 | bb_error_msg_and_die(bb_msg_invalid_arg, *argv, "port"); | ||
242 | memset(ifidx, 0, sizeof ifidx); | ||
243 | arm_ioctl(args, BRCTL_GET_PORT_LIST, (unsigned long)ifidx, | ||
244 | MAX_PORTS); | ||
245 | xioctl(fd, SIOCDEVPRIVATE, &ifr); | ||
246 | for (i = 0; i < MAX_PORTS; i++) { | ||
247 | if (ifidx[i] == port) { | ||
248 | port = i; | ||
249 | break; | ||
250 | } | ||
251 | } | ||
252 | } | ||
253 | arg1 = port; | ||
254 | arg2 = xatoi_u(*argv); | ||
255 | if (key == ARG_setbridgeprio) { | ||
256 | arg1 = arg2; | ||
257 | arg2 = 0; | ||
258 | } | ||
259 | arm_ioctl(args, ops[key - ARG_setpathcost], arg1, arg2); | ||
260 | } | ||
261 | fire: | ||
262 | /* Execute the previously set command */ | ||
263 | xioctl(fd, SIOCDEVPRIVATE, &ifr); | ||
264 | #endif | ||
265 | done_next_argv: | ||
266 | argv++; | ||
267 | done: | ||
268 | close(fd); | ||
269 | } | ||
270 | |||
271 | return EXIT_SUCCESS; | ||
272 | } |