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15#include "libbb.h"
16#include <linux/sockios.h>
17#include <net/if.h>
18
19#ifndef SIOCBRADDBR
20# define SIOCBRADDBR BRCTL_ADD_BRIDGE
21#endif
22#ifndef SIOCBRDELBR
23# define SIOCBRDELBR BRCTL_DEL_BRIDGE
24#endif
25#ifndef SIOCBRADDIF
26# define SIOCBRADDIF BRCTL_ADD_IF
27#endif
28#ifndef SIOCBRDELIF
29# define SIOCBRDELIF BRCTL_DEL_IF
30#endif
31
32
33
34#ifndef MAX_PORTS
35#define MAX_PORTS 32
36#endif
37
38
39
40#define BRCTL_USE_INTERNAL 1
41
42#if ENABLE_FEATURE_BRCTL_FANCY
43#include <linux/if_bridge.h>
44
45
46static ALWAYS_INLINE void strtotimeval(struct timeval *tv,
47 const char *time_str)
48{
49 double secs;
50#if BRCTL_USE_INTERNAL
51 secs = strtod(time_str, NULL);
52 if (!secs)
53#else
54 if (sscanf(time_str, "%lf", &secs) != 1)
55#endif
56 bb_error_msg_and_die (bb_msg_invalid_arg, time_str, "timespec");
57 tv->tv_sec = secs;
58 tv->tv_usec = 1000000 * (secs - tv->tv_sec);
59}
60
61static ALWAYS_INLINE unsigned long __tv_to_jiffies(const struct timeval *tv)
62{
63 unsigned long long jif;
64
65 jif = 1000000ULL * tv->tv_sec + tv->tv_usec;
66
67 return jif/10000;
68}
69# if 0
70static void __jiffies_to_tv(struct timeval *tv, unsigned long jiffies)
71{
72 unsigned long long tvusec;
73
74 tvusec = 10000ULL*jiffies;
75 tv->tv_sec = tvusec/1000000;
76 tv->tv_usec = tvusec - 1000000 * tv->tv_sec;
77}
78# endif
79static unsigned long str_to_jiffies(const char *time_str)
80{
81 struct timeval tv;
82 strtotimeval(&tv, time_str);
83 return __tv_to_jiffies(&tv);
84}
85
86static void arm_ioctl(unsigned long *args,
87 unsigned long arg0, unsigned long arg1, unsigned long arg2)
88{
89 args[0] = arg0;
90 args[1] = arg1;
91 args[2] = arg2;
92 args[3] = 0;
93}
94#endif
95
96
97int brctl_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
98int brctl_main(int argc UNUSED_PARAM, char **argv)
99{
100 static const char keywords[] ALIGN1 =
101 "addbr\0" "delbr\0" "addif\0" "delif\0"
102 USE_FEATURE_BRCTL_FANCY(
103 "stp\0"
104 "setageing\0" "setfd\0" "sethello\0" "setmaxage\0"
105 "setpathcost\0" "setportprio\0" "setbridgeprio\0"
106 )
107 USE_FEATURE_BRCTL_SHOW("showmacs\0" "show\0");
108
109 enum { ARG_addbr = 0, ARG_delbr, ARG_addif, ARG_delif
110 USE_FEATURE_BRCTL_FANCY(,
111 ARG_stp,
112 ARG_setageing, ARG_setfd, ARG_sethello, ARG_setmaxage,
113 ARG_setpathcost, ARG_setportprio, ARG_setbridgeprio
114 )
115 USE_FEATURE_BRCTL_SHOW(, ARG_showmacs, ARG_show)
116 };
117
118 int fd;
119 smallint key;
120 struct ifreq ifr;
121 char *br, *brif;
122
123 argv++;
124 while (*argv) {
125#if ENABLE_FEATURE_BRCTL_FANCY
126 int ifidx[MAX_PORTS];
127 unsigned long args[4];
128 ifr.ifr_data = (char *) &args;
129#endif
130
131 key = index_in_strings(keywords, *argv);
132 if (key == -1)
133 bb_error_msg_and_die(bb_msg_invalid_arg, *argv, applet_name);
134 argv++;
135 fd = xsocket(AF_INET, SOCK_STREAM, 0);
136
137#if ENABLE_FEATURE_BRCTL_SHOW
138 if (key == ARG_show) {
139 char brname[IFNAMSIZ];
140 int bridx[MAX_PORTS];
141 int i, num;
142 arm_ioctl(args, BRCTL_GET_BRIDGES,
143 (unsigned long) bridx, MAX_PORTS);
144 num = xioctl(fd, SIOCGIFBR, args);
145 printf("bridge name\tbridge id\t\tSTP enabled\tinterfaces\n");
146 for (i = 0; i < num; i++) {
147 char ifname[IFNAMSIZ];
148 int j, tabs;
149 struct __bridge_info bi;
150 unsigned char *x;
151
152 if (!if_indextoname(bridx[i], brname))
153 bb_perror_msg_and_die("can't get bridge name for index %d", i);
154 strncpy_IFNAMSIZ(ifr.ifr_name, brname);
155
156 arm_ioctl(args, BRCTL_GET_BRIDGE_INFO,
157 (unsigned long) &bi, 0);
158 xioctl(fd, SIOCDEVPRIVATE, &ifr);
159 printf("%s\t\t", brname);
160
161
162 x = (unsigned char *) &bi.bridge_id;
163 for (j = 0; j < 8; j++) {
164 printf("%.2x", x[j]);
165 if (j == 1)
166 bb_putchar('.');
167 }
168 printf(bi.stp_enabled ? "\tyes" : "\tno");
169
170
171 arm_ioctl(args, BRCTL_GET_PORT_LIST,
172 (unsigned long) ifidx, MAX_PORTS);
173 xioctl(fd, SIOCDEVPRIVATE, &ifr);
174 tabs = 0;
175 for (j = 0; j < MAX_PORTS; j++) {
176 if (!ifidx[j])
177 continue;
178 if (!if_indextoname(ifidx[j], ifname))
179 bb_perror_msg_and_die("can't get interface name for index %d", j);
180 if (tabs)
181 printf("\t\t\t\t\t");
182 else
183 tabs = 1;
184 printf("\t\t%s\n", ifname);
185 }
186 if (!tabs)
187 bb_putchar('\n');
188 }
189 goto done;
190 }
191#endif
192
193 if (!*argv)
194 bb_show_usage();
195
196 br = *argv++;
197
198 if (key == ARG_addbr || key == ARG_delbr) {
199 ioctl_or_perror_and_die(fd,
200 key == ARG_addbr ? SIOCBRADDBR : SIOCBRDELBR,
201 br, "bridge %s", br);
202 goto done;
203 }
204
205 if (!*argv)
206 bb_show_usage();
207
208 strncpy_IFNAMSIZ(ifr.ifr_name, br);
209 if (key == ARG_addif || key == ARG_delif) {
210 brif = *argv;
211 ifr.ifr_ifindex = if_nametoindex(brif);
212 if (!ifr.ifr_ifindex) {
213 bb_perror_msg_and_die("iface %s", brif);
214 }
215 ioctl_or_perror_and_die(fd,
216 key == ARG_addif ? SIOCBRADDIF : SIOCBRDELIF,
217 &ifr, "bridge %s", br);
218 goto done_next_argv;
219 }
220#if ENABLE_FEATURE_BRCTL_FANCY
221 if (key == ARG_stp) {
222
223 arm_ioctl(args, BRCTL_SET_BRIDGE_STP_STATE,
224 (unsigned)(**argv - '0'), 0);
225 goto fire;
226 }
227 if ((unsigned)(key - ARG_setageing) < 4) {
228 static const uint8_t ops[] ALIGN1 = {
229 BRCTL_SET_AGEING_TIME,
230 BRCTL_SET_BRIDGE_FORWARD_DELAY,
231 BRCTL_SET_BRIDGE_HELLO_TIME,
232 BRCTL_SET_BRIDGE_MAX_AGE
233 };
234 arm_ioctl(args, ops[key - ARG_setageing], str_to_jiffies(*argv), 0);
235 goto fire;
236 }
237 if (key == ARG_setpathcost
238 || key == ARG_setportprio
239 || key == ARG_setbridgeprio
240 ) {
241 static const uint8_t ops[] ALIGN1 = {
242 BRCTL_SET_PATH_COST,
243 BRCTL_SET_PORT_PRIORITY,
244 BRCTL_SET_BRIDGE_PRIORITY
245 };
246 int port = -1;
247 unsigned arg1, arg2;
248
249 if (key != ARG_setbridgeprio) {
250
251 unsigned i;
252
253 port = if_nametoindex(*argv++);
254 if (!port)
255 bb_error_msg_and_die(bb_msg_invalid_arg, *argv, "port");
256 memset(ifidx, 0, sizeof ifidx);
257 arm_ioctl(args, BRCTL_GET_PORT_LIST, (unsigned long)ifidx,
258 MAX_PORTS);
259 xioctl(fd, SIOCDEVPRIVATE, &ifr);
260 for (i = 0; i < MAX_PORTS; i++) {
261 if (ifidx[i] == port) {
262 port = i;
263 break;
264 }
265 }
266 }
267 arg1 = port;
268 arg2 = xatoi_u(*argv);
269 if (key == ARG_setbridgeprio) {
270 arg1 = arg2;
271 arg2 = 0;
272 }
273 arm_ioctl(args, ops[key - ARG_setpathcost], arg1, arg2);
274 }
275 fire:
276
277 xioctl(fd, SIOCDEVPRIVATE, &ifr);
278#endif
279 done_next_argv:
280 argv++;
281 done:
282 close(fd);
283 }
284
285 return EXIT_SUCCESS;
286}
287
