6 #include <sys/socket.h>
8 #include <netinet/in.h>
10 #include <linux/if_bridge.h>
14 #include "libnetlink.h"
16 #include "br_common.h"
18 static unsigned int filter_index
;
20 static const char *port_states
[] = {
21 [BR_STATE_DISABLED
] = "disabled",
22 [BR_STATE_LISTENING
] = "listening",
23 [BR_STATE_LEARNING
] = "learning",
24 [BR_STATE_FORWARDING
] = "forwarding",
25 [BR_STATE_BLOCKING
] = "blocking",
28 extern char *if_indextoname(unsigned int __ifindex
, char *__ifname
);
30 static void print_link_flags(FILE *fp
, unsigned int flags
)
33 if (flags
& IFF_UP
&& !(flags
& IFF_RUNNING
))
34 fprintf(fp
, "NO-CARRIER%s", flags
? "," : "");
35 flags
&= ~IFF_RUNNING
;
36 #define _PF(f) if (flags&IFF_##f) { \
38 fprintf(fp, #f "%s", flags ? "," : ""); }
59 fprintf(fp
, "%x", flags
);
63 static const char *oper_states
[] = {
64 "UNKNOWN", "NOTPRESENT", "DOWN", "LOWERLAYERDOWN",
65 "TESTING", "DORMANT", "UP"
68 static const char *hw_mode
[] = {"VEB", "VEPA"};
70 static void print_operstate(FILE *f
, __u8 state
)
72 if (state
>= ARRAY_SIZE(oper_states
))
73 fprintf(f
, "state %#x ", state
);
75 fprintf(f
, "state %s ", oper_states
[state
]);
78 static void print_portstate(FILE *f
, __u8 state
)
80 if (state
<= BR_STATE_BLOCKING
)
81 fprintf(f
, "state %s ", port_states
[state
]);
83 fprintf(f
, "state (%d) ", state
);
86 static void print_onoff(FILE *f
, char *flag
, __u8 val
)
88 fprintf(f
, "%s %s ", flag
, val
? "on" : "off");
91 static void print_hwmode(FILE *f
, __u16 mode
)
93 if (mode
>= ARRAY_SIZE(hw_mode
))
94 fprintf(f
, "hwmode %#hx ", mode
);
96 fprintf(f
, "hwmode %s ", hw_mode
[mode
]);
99 int print_linkinfo(const struct sockaddr_nl
*who
,
100 struct nlmsghdr
*n
, void *arg
)
103 int len
= n
->nlmsg_len
;
104 struct ifinfomsg
*ifi
= NLMSG_DATA(n
);
105 struct rtattr
*tb
[IFLA_MAX
+1];
108 len
-= NLMSG_LENGTH(sizeof(*ifi
));
110 fprintf(stderr
, "Message too short!\n");
114 if (!(ifi
->ifi_family
== AF_BRIDGE
|| ifi
->ifi_family
== AF_UNSPEC
))
117 if (filter_index
&& filter_index
!= ifi
->ifi_index
)
120 parse_rtattr_flags(tb
, IFLA_MAX
, IFLA_RTA(ifi
), len
, NLA_F_NESTED
);
122 if (tb
[IFLA_IFNAME
] == NULL
) {
123 fprintf(stderr
, "BUG: nil ifname\n");
127 if (n
->nlmsg_type
== RTM_DELLINK
)
128 fprintf(fp
, "Deleted ");
130 fprintf(fp
, "%d: %s ", ifi
->ifi_index
,
131 tb
[IFLA_IFNAME
] ? rta_getattr_str(tb
[IFLA_IFNAME
]) : "<nil>");
133 if (tb
[IFLA_OPERSTATE
])
134 print_operstate(fp
, rta_getattr_u8(tb
[IFLA_OPERSTATE
]));
138 int iflink
= rta_getattr_u32(tb
[IFLA_LINK
]);
141 fprintf(fp
, "@NONE: ");
144 if_indextoname(iflink
, b1
));
148 print_link_flags(fp
, ifi
->ifi_flags
);
151 fprintf(fp
, "mtu %u ", rta_getattr_u32(tb
[IFLA_MTU
]));
154 fprintf(fp
, "master %s ",
155 if_indextoname(rta_getattr_u32(tb
[IFLA_MASTER
]), b1
));
157 if (tb
[IFLA_PROTINFO
]) {
158 if (tb
[IFLA_PROTINFO
]->rta_type
& NLA_F_NESTED
) {
159 struct rtattr
*prtb
[IFLA_BRPORT_MAX
+1];
161 parse_rtattr_nested(prtb
, IFLA_BRPORT_MAX
,
164 if (prtb
[IFLA_BRPORT_STATE
])
166 rta_getattr_u8(prtb
[IFLA_BRPORT_STATE
]));
167 if (prtb
[IFLA_BRPORT_PRIORITY
])
168 fprintf(fp
, "priority %hu ",
169 rta_getattr_u16(prtb
[IFLA_BRPORT_PRIORITY
]));
170 if (prtb
[IFLA_BRPORT_COST
])
171 fprintf(fp
, "cost %u ",
172 rta_getattr_u32(prtb
[IFLA_BRPORT_COST
]));
175 fprintf(fp
, "%s ", _SL_
);
177 if (prtb
[IFLA_BRPORT_MODE
])
178 print_onoff(fp
, "hairpin",
179 rta_getattr_u8(prtb
[IFLA_BRPORT_MODE
]));
180 if (prtb
[IFLA_BRPORT_GUARD
])
181 print_onoff(fp
, "guard",
182 rta_getattr_u8(prtb
[IFLA_BRPORT_GUARD
]));
183 if (prtb
[IFLA_BRPORT_PROTECT
])
184 print_onoff(fp
, "root_block",
185 rta_getattr_u8(prtb
[IFLA_BRPORT_PROTECT
]));
186 if (prtb
[IFLA_BRPORT_FAST_LEAVE
])
187 print_onoff(fp
, "fastleave",
188 rta_getattr_u8(prtb
[IFLA_BRPORT_FAST_LEAVE
]));
189 if (prtb
[IFLA_BRPORT_LEARNING
])
190 print_onoff(fp
, "learning",
191 rta_getattr_u8(prtb
[IFLA_BRPORT_LEARNING
]));
192 if (prtb
[IFLA_BRPORT_LEARNING_SYNC
])
193 print_onoff(fp
, "learning_sync",
194 rta_getattr_u8(prtb
[IFLA_BRPORT_LEARNING_SYNC
]));
195 if (prtb
[IFLA_BRPORT_UNICAST_FLOOD
])
196 print_onoff(fp
, "flood",
197 rta_getattr_u8(prtb
[IFLA_BRPORT_UNICAST_FLOOD
]));
200 print_portstate(fp
, rta_getattr_u8(tb
[IFLA_PROTINFO
]));
203 if (tb
[IFLA_AF_SPEC
]) {
204 /* This is reported by HW devices that have some bridging
207 struct rtattr
*aftb
[IFLA_BRIDGE_MAX
+1];
209 parse_rtattr_nested(aftb
, IFLA_BRIDGE_MAX
, tb
[IFLA_AF_SPEC
]);
211 if (aftb
[IFLA_BRIDGE_MODE
])
212 print_hwmode(fp
, rta_getattr_u16(aftb
[IFLA_BRIDGE_MODE
]));
220 static void usage(void)
222 fprintf(stderr
, "Usage: bridge link set dev DEV [ cost COST ] [ priority PRIO ] [ state STATE ]\n");
223 fprintf(stderr
, " [ guard {on | off} ]\n");
224 fprintf(stderr
, " [ hairpin {on | off} ]\n");
225 fprintf(stderr
, " [ fastleave {on | off} ]\n");
226 fprintf(stderr
, " [ root_block {on | off} ]\n");
227 fprintf(stderr
, " [ learning {on | off} ]\n");
228 fprintf(stderr
, " [ learning_sync {on | off} ]\n");
229 fprintf(stderr
, " [ flood {on | off} ]\n");
230 fprintf(stderr
, " [ hwmode {vepa | veb} ]\n");
231 fprintf(stderr
, " [ self ] [ master ]\n");
232 fprintf(stderr
, " bridge link show [dev DEV]\n");
236 static bool on_off(char *arg
, __s8
*attr
, char *val
)
238 if (strcmp(val
, "on") == 0)
240 else if (strcmp(val
, "off") == 0)
244 "Error: argument of \"%s\" must be \"on\" or \"off\"\n",
252 static int brlink_modify(int argc
, char **argv
)
256 struct ifinfomsg ifm
;
261 __s8 learning_sync
= -1;
264 __s8 bpdu_guard
= -1;
265 __s8 fast_leave
= -1;
266 __s8 root_block
= -1;
274 memset(&req
, 0, sizeof(req
));
276 req
.n
.nlmsg_len
= NLMSG_LENGTH(sizeof(struct ifinfomsg
));
277 req
.n
.nlmsg_flags
= NLM_F_REQUEST
;
278 req
.n
.nlmsg_type
= RTM_SETLINK
;
279 req
.ifm
.ifi_family
= PF_BRIDGE
;
282 if (strcmp(*argv
, "dev") == 0) {
285 } else if (strcmp(*argv
, "guard") == 0) {
287 if (!on_off("guard", &bpdu_guard
, *argv
))
289 } else if (strcmp(*argv
, "hairpin") == 0) {
291 if (!on_off("hairping", &hairpin
, *argv
))
293 } else if (strcmp(*argv
, "fastleave") == 0) {
295 if (!on_off("fastleave", &fast_leave
, *argv
))
297 } else if (strcmp(*argv
, "root_block") == 0) {
299 if (!on_off("root_block", &root_block
, *argv
))
301 } else if (strcmp(*argv
, "learning") == 0) {
303 if (!on_off("learning", &learning
, *argv
))
305 } else if (strcmp(*argv
, "learning_sync") == 0) {
307 if (!on_off("learning_sync", &learning_sync
, *argv
))
309 } else if (strcmp(*argv
, "flood") == 0) {
311 if (!on_off("flood", &flood
, *argv
))
313 } else if (strcmp(*argv
, "cost") == 0) {
316 } else if (strcmp(*argv
, "priority") == 0) {
318 priority
= atoi(*argv
);
319 } else if (strcmp(*argv
, "state") == 0) {
322 size_t nstates
= sizeof(port_states
) / sizeof(*port_states
);
324 state
= strtol(*argv
, &endptr
, 10);
325 if (!(**argv
!= '\0' && *endptr
== '\0')) {
326 for (state
= 0; state
< nstates
; state
++)
327 if (strcmp(port_states
[state
], *argv
) == 0)
329 if (state
== nstates
) {
331 "Error: invalid STP port state\n");
335 } else if (strcmp(*argv
, "hwmode") == 0) {
337 flags
= BRIDGE_FLAGS_SELF
;
338 if (strcmp(*argv
, "vepa") == 0)
339 mode
= BRIDGE_MODE_VEPA
;
340 else if (strcmp(*argv
, "veb") == 0)
341 mode
= BRIDGE_MODE_VEB
;
344 "Mode argument must be \"vepa\" or \"veb\".\n");
347 } else if (strcmp(*argv
, "self") == 0) {
348 flags
|= BRIDGE_FLAGS_SELF
;
349 } else if (strcmp(*argv
, "master") == 0) {
350 flags
|= BRIDGE_FLAGS_MASTER
;
357 fprintf(stderr
, "Device is a required argument.\n");
362 req
.ifm
.ifi_index
= ll_name_to_index(d
);
363 if (req
.ifm
.ifi_index
== 0) {
364 fprintf(stderr
, "Cannot find bridge device \"%s\"\n", d
);
368 /* Nested PROTINFO attribute. Contains: port flags, cost, priority and
371 nest
= addattr_nest(&req
.n
, sizeof(req
),
372 IFLA_PROTINFO
| NLA_F_NESTED
);
375 addattr8(&req
.n
, sizeof(req
), IFLA_BRPORT_GUARD
, bpdu_guard
);
377 addattr8(&req
.n
, sizeof(req
), IFLA_BRPORT_MODE
, hairpin
);
379 addattr8(&req
.n
, sizeof(req
), IFLA_BRPORT_FAST_LEAVE
,
382 addattr8(&req
.n
, sizeof(req
), IFLA_BRPORT_PROTECT
, root_block
);
384 addattr8(&req
.n
, sizeof(req
), IFLA_BRPORT_UNICAST_FLOOD
, flood
);
386 addattr8(&req
.n
, sizeof(req
), IFLA_BRPORT_LEARNING
, learning
);
387 if (learning_sync
>= 0)
388 addattr8(&req
.n
, sizeof(req
), IFLA_BRPORT_LEARNING_SYNC
,
392 addattr32(&req
.n
, sizeof(req
), IFLA_BRPORT_COST
, cost
);
395 addattr16(&req
.n
, sizeof(req
), IFLA_BRPORT_PRIORITY
, priority
);
398 addattr8(&req
.n
, sizeof(req
), IFLA_BRPORT_STATE
, state
);
400 addattr_nest_end(&req
.n
, nest
);
402 /* IFLA_AF_SPEC nested attribute. Contains IFLA_BRIDGE_FLAGS that
403 * designates master or self operation and IFLA_BRIDGE_MODE
404 * for hw 'vepa' or 'veb' operation modes. The hwmodes are
405 * only valid in 'self' mode on some devices so far.
407 if (mode
>= 0 || flags
> 0) {
408 nest
= addattr_nest(&req
.n
, sizeof(req
), IFLA_AF_SPEC
);
411 addattr16(&req
.n
, sizeof(req
), IFLA_BRIDGE_FLAGS
, flags
);
414 addattr16(&req
.n
, sizeof(req
), IFLA_BRIDGE_MODE
, mode
);
416 addattr_nest_end(&req
.n
, nest
);
419 if (rtnl_talk(&rth
, &req
.n
, NULL
, 0) < 0)
425 static int brlink_show(int argc
, char **argv
)
427 char *filter_dev
= NULL
;
430 if (strcmp(*argv
, "dev") == 0) {
433 duparg("dev", *argv
);
440 if ((filter_index
= ll_name_to_index(filter_dev
)) == 0) {
441 fprintf(stderr
, "Cannot find device \"%s\"\n",
447 if (rtnl_wilddump_request(&rth
, PF_BRIDGE
, RTM_GETLINK
) < 0) {
448 perror("Cannon send dump request");
452 if (rtnl_dump_filter(&rth
, print_linkinfo
, stdout
) < 0) {
453 fprintf(stderr
, "Dump terminated\n");
459 int do_link(int argc
, char **argv
)
463 if (matches(*argv
, "set") == 0 ||
464 matches(*argv
, "change") == 0)
465 return brlink_modify(argc
-1, argv
+1);
466 if (matches(*argv
, "show") == 0 ||
467 matches(*argv
, "lst") == 0 ||
468 matches(*argv
, "list") == 0)
469 return brlink_show(argc
-1, argv
+1);
470 if (matches(*argv
, "help") == 0)
473 return brlink_show(0, NULL
);
475 fprintf(stderr
, "Command \"%s\" is unknown, try \"bridge link help\".\n", *argv
);