+/* SPDX-License-Identifier: GPL-2.0 */
#include <stdio.h>
#include <stdlib.h>
#include <linux/if.h>
#include <linux/if_bridge.h>
#include <string.h>
+#include <stdbool.h>
+#include "libnetlink.h"
#include "utils.h"
#include "br_common.h"
+static unsigned int filter_index;
+
static const char *port_states[] = {
[BR_STATE_DISABLED] = "disabled",
[BR_STATE_LISTENING] = "listening",
[BR_STATE_BLOCKING] = "blocking",
};
-extern char *if_indextoname (unsigned int __ifindex, char *__ifname);
-
-static void print_link_flags(FILE *fp, unsigned flags)
+static void print_link_flags(FILE *fp, unsigned int flags)
{
fprintf(fp, "<");
if (flags & IFF_UP && !(flags & IFF_RUNNING))
fprintf(fp, "NO-CARRIER%s", flags ? "," : "");
flags &= ~IFF_RUNNING;
#define _PF(f) if (flags&IFF_##f) { \
- flags &= ~IFF_##f ; \
- fprintf(fp, #f "%s", flags ? "," : ""); }
+ flags &= ~IFF_##f ; \
+ fprintf(fp, #f "%s", flags ? "," : ""); }
_PF(LOOPBACK);
_PF(BROADCAST);
_PF(POINTOPOINT);
_PF(DORMANT);
_PF(ECHO);
#undef _PF
- if (flags)
+ if (flags)
fprintf(fp, "%x", flags);
fprintf(fp, "> ");
}
static const char *oper_states[] = {
- "UNKNOWN", "NOTPRESENT", "DOWN", "LOWERLAYERDOWN",
+ "UNKNOWN", "NOTPRESENT", "DOWN", "LOWERLAYERDOWN",
"TESTING", "DORMANT", "UP"
};
+static const char *hw_mode[] = {"VEB", "VEPA"};
+
static void print_operstate(FILE *f, __u8 state)
{
- if (state >= sizeof(oper_states)/sizeof(oper_states[0]))
+ if (state >= ARRAY_SIZE(oper_states))
fprintf(f, "state %#x ", state);
else
fprintf(f, "state %s ", oper_states[state]);
}
+static void print_portstate(FILE *f, __u8 state)
+{
+ if (state <= BR_STATE_BLOCKING)
+ fprintf(f, "state %s ", port_states[state]);
+ else
+ fprintf(f, "state (%d) ", state);
+}
+
+static void print_onoff(FILE *f, char *flag, __u8 val)
+{
+ fprintf(f, "%s %s ", flag, val ? "on" : "off");
+}
+
+static void print_hwmode(FILE *f, __u16 mode)
+{
+ if (mode >= ARRAY_SIZE(hw_mode))
+ fprintf(f, "hwmode %#hx ", mode);
+ else
+ fprintf(f, "hwmode %s ", hw_mode[mode]);
+}
+
int print_linkinfo(const struct sockaddr_nl *who,
struct nlmsghdr *n, void *arg)
{
FILE *fp = arg;
int len = n->nlmsg_len;
struct ifinfomsg *ifi = NLMSG_DATA(n);
- struct rtattr * tb[IFLA_MAX+1];
- char b1[IFNAMSIZ];
+ struct rtattr *tb[IFLA_MAX+1];
len -= NLMSG_LENGTH(sizeof(*ifi));
if (len < 0) {
fprintf(stderr, "Message too short!\n");
return -1;
- }
+ }
if (!(ifi->ifi_family == AF_BRIDGE || ifi->ifi_family == AF_UNSPEC))
return 0;
- parse_rtattr(tb, IFLA_MAX, IFLA_RTA(ifi), len);
+ if (filter_index && filter_index != ifi->ifi_index)
+ return 0;
+
+ parse_rtattr_flags(tb, IFLA_MAX, IFLA_RTA(ifi), len, NLA_F_NESTED);
if (tb[IFLA_IFNAME] == NULL) {
fprintf(stderr, "BUG: nil ifname\n");
fprintf(fp, "Deleted ");
fprintf(fp, "%d: %s ", ifi->ifi_index,
- tb[IFLA_IFNAME] ? (char*)RTA_DATA(tb[IFLA_IFNAME]) : "<nil>");
+ tb[IFLA_IFNAME] ? rta_getattr_str(tb[IFLA_IFNAME]) : "<nil>");
+
+ if (tb[IFLA_OPERSTATE])
+ print_operstate(fp, rta_getattr_u8(tb[IFLA_OPERSTATE]));
- if (tb[IFLA_OPERSTATE])
- print_operstate(fp, *(__u8 *)RTA_DATA(tb[IFLA_OPERSTATE]));
-
if (tb[IFLA_LINK]) {
- SPRINT_BUF(b1);
- int iflink = *(int*)RTA_DATA(tb[IFLA_LINK]);
-
- if (iflink == 0)
- fprintf(fp, "@NONE: ");
- else {
- fprintf(fp, "@%s: ",
- if_indextoname(iflink, b1));
- }
- } else {
+ int iflink = rta_getattr_u32(tb[IFLA_LINK]);
+
+ fprintf(fp, "@%s: ",
+ iflink ? ll_index_to_name(iflink) : "NONE");
+ } else
fprintf(fp, ": ");
- }
print_link_flags(fp, ifi->ifi_flags);
if (tb[IFLA_MTU])
- fprintf(fp, "mtu %u ", *(int*)RTA_DATA(tb[IFLA_MTU]));
+ fprintf(fp, "mtu %u ", rta_getattr_u32(tb[IFLA_MTU]));
if (tb[IFLA_MASTER]) {
- fprintf(fp, "master %s ",
- if_indextoname(*(int*)RTA_DATA(tb[IFLA_MASTER]), b1));
+ int master = rta_getattr_u32(tb[IFLA_MASTER]);
+
+ fprintf(fp, "master %s ", ll_index_to_name(master));
}
if (tb[IFLA_PROTINFO]) {
- uint8_t state = *(uint8_t *)RTA_DATA(tb[IFLA_PROTINFO]);
- if (state <= BR_STATE_BLOCKING)
- fprintf(fp, "state %s", port_states[state]);
- else
- fprintf(fp, "state (%d)", state);
+ if (tb[IFLA_PROTINFO]->rta_type & NLA_F_NESTED) {
+ struct rtattr *prtb[IFLA_BRPORT_MAX+1];
+
+ parse_rtattr_nested(prtb, IFLA_BRPORT_MAX,
+ tb[IFLA_PROTINFO]);
+
+ if (prtb[IFLA_BRPORT_STATE])
+ print_portstate(fp,
+ rta_getattr_u8(prtb[IFLA_BRPORT_STATE]));
+ if (prtb[IFLA_BRPORT_PRIORITY])
+ fprintf(fp, "priority %hu ",
+ rta_getattr_u16(prtb[IFLA_BRPORT_PRIORITY]));
+ if (prtb[IFLA_BRPORT_COST])
+ fprintf(fp, "cost %u ",
+ rta_getattr_u32(prtb[IFLA_BRPORT_COST]));
+
+ if (show_details) {
+ fprintf(fp, "%s ", _SL_);
+
+ if (prtb[IFLA_BRPORT_MODE])
+ print_onoff(fp, "hairpin",
+ rta_getattr_u8(prtb[IFLA_BRPORT_MODE]));
+ if (prtb[IFLA_BRPORT_GUARD])
+ print_onoff(fp, "guard",
+ rta_getattr_u8(prtb[IFLA_BRPORT_GUARD]));
+ if (prtb[IFLA_BRPORT_PROTECT])
+ print_onoff(fp, "root_block",
+ rta_getattr_u8(prtb[IFLA_BRPORT_PROTECT]));
+ if (prtb[IFLA_BRPORT_FAST_LEAVE])
+ print_onoff(fp, "fastleave",
+ rta_getattr_u8(prtb[IFLA_BRPORT_FAST_LEAVE]));
+ if (prtb[IFLA_BRPORT_LEARNING])
+ print_onoff(fp, "learning",
+ rta_getattr_u8(prtb[IFLA_BRPORT_LEARNING]));
+ if (prtb[IFLA_BRPORT_LEARNING_SYNC])
+ print_onoff(fp, "learning_sync",
+ rta_getattr_u8(prtb[IFLA_BRPORT_LEARNING_SYNC]));
+ if (prtb[IFLA_BRPORT_UNICAST_FLOOD])
+ print_onoff(fp, "flood",
+ rta_getattr_u8(prtb[IFLA_BRPORT_UNICAST_FLOOD]));
+ if (prtb[IFLA_BRPORT_MCAST_FLOOD])
+ print_onoff(fp, "mcast_flood",
+ rta_getattr_u8(prtb[IFLA_BRPORT_MCAST_FLOOD]));
+ if (prtb[IFLA_BRPORT_NEIGH_SUPPRESS])
+ print_onoff(fp, "neigh_suppress",
+ rta_getattr_u8(prtb[IFLA_BRPORT_NEIGH_SUPPRESS]));
+ if (prtb[IFLA_BRPORT_VLAN_TUNNEL])
+ print_onoff(fp, "vlan_tunnel",
+ rta_getattr_u8(prtb[IFLA_BRPORT_VLAN_TUNNEL]));
+ }
+ } else
+ print_portstate(fp, rta_getattr_u8(tb[IFLA_PROTINFO]));
}
+ if (tb[IFLA_AF_SPEC]) {
+ /* This is reported by HW devices that have some bridging
+ * capabilities.
+ */
+ struct rtattr *aftb[IFLA_BRIDGE_MAX+1];
+
+ parse_rtattr_nested(aftb, IFLA_BRIDGE_MAX, tb[IFLA_AF_SPEC]);
+
+ if (aftb[IFLA_BRIDGE_MODE])
+ print_hwmode(fp, rta_getattr_u16(aftb[IFLA_BRIDGE_MODE]));
+ if (show_details) {
+ if (aftb[IFLA_BRIDGE_VLAN_INFO]) {
+ fprintf(fp, "\n");
+ print_vlan_info(fp, tb[IFLA_AF_SPEC],
+ ifi->ifi_index);
+ }
+ }
+ }
fprintf(fp, "\n");
fflush(fp);
return 0;
}
+
+static void usage(void)
+{
+ fprintf(stderr, "Usage: bridge link set dev DEV [ cost COST ] [ priority PRIO ] [ state STATE ]\n");
+ fprintf(stderr, " [ guard {on | off} ]\n");
+ fprintf(stderr, " [ hairpin {on | off} ]\n");
+ fprintf(stderr, " [ fastleave {on | off} ]\n");
+ fprintf(stderr, " [ root_block {on | off} ]\n");
+ fprintf(stderr, " [ learning {on | off} ]\n");
+ fprintf(stderr, " [ learning_sync {on | off} ]\n");
+ fprintf(stderr, " [ flood {on | off} ]\n");
+ fprintf(stderr, " [ mcast_flood {on | off} ]\n");
+ fprintf(stderr, " [ neigh_suppress {on | off} ]\n");
+ fprintf(stderr, " [ vlan_tunnel {on | off} ]\n");
+ fprintf(stderr, " [ hwmode {vepa | veb} ]\n");
+ fprintf(stderr, " [ self ] [ master ]\n");
+ fprintf(stderr, " bridge link show [dev DEV]\n");
+ exit(-1);
+}
+
+static bool on_off(char *arg, __s8 *attr, char *val)
+{
+ if (strcmp(val, "on") == 0)
+ *attr = 1;
+ else if (strcmp(val, "off") == 0)
+ *attr = 0;
+ else {
+ fprintf(stderr,
+ "Error: argument of \"%s\" must be \"on\" or \"off\"\n",
+ arg);
+ return false;
+ }
+
+ return true;
+}
+
+static int brlink_modify(int argc, char **argv)
+{
+ struct {
+ struct nlmsghdr n;
+ struct ifinfomsg ifm;
+ char buf[512];
+ } req = {
+ .n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg)),
+ .n.nlmsg_flags = NLM_F_REQUEST,
+ .n.nlmsg_type = RTM_SETLINK,
+ .ifm.ifi_family = PF_BRIDGE,
+ };
+ char *d = NULL;
+ __s8 neigh_suppress = -1;
+ __s8 learning = -1;
+ __s8 learning_sync = -1;
+ __s8 flood = -1;
+ __s8 vlan_tunnel = -1;
+ __s8 mcast_flood = -1;
+ __s8 hairpin = -1;
+ __s8 bpdu_guard = -1;
+ __s8 fast_leave = -1;
+ __s8 root_block = -1;
+ __u32 cost = 0;
+ __s16 priority = -1;
+ __s8 state = -1;
+ __s16 mode = -1;
+ __u16 flags = 0;
+ struct rtattr *nest;
+
+ while (argc > 0) {
+ if (strcmp(*argv, "dev") == 0) {
+ NEXT_ARG();
+ d = *argv;
+ } else if (strcmp(*argv, "guard") == 0) {
+ NEXT_ARG();
+ if (!on_off("guard", &bpdu_guard, *argv))
+ return -1;
+ } else if (strcmp(*argv, "hairpin") == 0) {
+ NEXT_ARG();
+ if (!on_off("hairping", &hairpin, *argv))
+ return -1;
+ } else if (strcmp(*argv, "fastleave") == 0) {
+ NEXT_ARG();
+ if (!on_off("fastleave", &fast_leave, *argv))
+ return -1;
+ } else if (strcmp(*argv, "root_block") == 0) {
+ NEXT_ARG();
+ if (!on_off("root_block", &root_block, *argv))
+ return -1;
+ } else if (strcmp(*argv, "learning") == 0) {
+ NEXT_ARG();
+ if (!on_off("learning", &learning, *argv))
+ return -1;
+ } else if (strcmp(*argv, "learning_sync") == 0) {
+ NEXT_ARG();
+ if (!on_off("learning_sync", &learning_sync, *argv))
+ return -1;
+ } else if (strcmp(*argv, "flood") == 0) {
+ NEXT_ARG();
+ if (!on_off("flood", &flood, *argv))
+ return -1;
+ } else if (strcmp(*argv, "mcast_flood") == 0) {
+ NEXT_ARG();
+ if (!on_off("mcast_flood", &mcast_flood, *argv))
+ return -1;
+ } else if (strcmp(*argv, "cost") == 0) {
+ NEXT_ARG();
+ cost = atoi(*argv);
+ } else if (strcmp(*argv, "priority") == 0) {
+ NEXT_ARG();
+ priority = atoi(*argv);
+ } else if (strcmp(*argv, "state") == 0) {
+ NEXT_ARG();
+ char *endptr;
+ size_t nstates = ARRAY_SIZE(port_states);
+
+ state = strtol(*argv, &endptr, 10);
+ if (!(**argv != '\0' && *endptr == '\0')) {
+ for (state = 0; state < nstates; state++)
+ if (strcmp(port_states[state], *argv) == 0)
+ break;
+ if (state == nstates) {
+ fprintf(stderr,
+ "Error: invalid STP port state\n");
+ return -1;
+ }
+ }
+ } else if (strcmp(*argv, "hwmode") == 0) {
+ NEXT_ARG();
+ flags = BRIDGE_FLAGS_SELF;
+ if (strcmp(*argv, "vepa") == 0)
+ mode = BRIDGE_MODE_VEPA;
+ else if (strcmp(*argv, "veb") == 0)
+ mode = BRIDGE_MODE_VEB;
+ else {
+ fprintf(stderr,
+ "Mode argument must be \"vepa\" or \"veb\".\n");
+ return -1;
+ }
+ } else if (strcmp(*argv, "self") == 0) {
+ flags |= BRIDGE_FLAGS_SELF;
+ } else if (strcmp(*argv, "master") == 0) {
+ flags |= BRIDGE_FLAGS_MASTER;
+ } else if (strcmp(*argv, "neigh_suppress") == 0) {
+ NEXT_ARG();
+ if (!on_off("neigh_suppress", &neigh_suppress,
+ *argv))
+ return -1;
+ } else if (strcmp(*argv, "vlan_tunnel") == 0) {
+ NEXT_ARG();
+ if (!on_off("vlan_tunnel", &vlan_tunnel,
+ *argv))
+ return -1;
+ } else {
+ usage();
+ }
+ argc--; argv++;
+ }
+ if (d == NULL) {
+ fprintf(stderr, "Device is a required argument.\n");
+ return -1;
+ }
+
+
+ req.ifm.ifi_index = ll_name_to_index(d);
+ if (req.ifm.ifi_index == 0) {
+ fprintf(stderr, "Cannot find bridge device \"%s\"\n", d);
+ return -1;
+ }
+
+ /* Nested PROTINFO attribute. Contains: port flags, cost, priority and
+ * state.
+ */
+ nest = addattr_nest(&req.n, sizeof(req),
+ IFLA_PROTINFO | NLA_F_NESTED);
+ /* Flags first */
+ if (bpdu_guard >= 0)
+ addattr8(&req.n, sizeof(req), IFLA_BRPORT_GUARD, bpdu_guard);
+ if (hairpin >= 0)
+ addattr8(&req.n, sizeof(req), IFLA_BRPORT_MODE, hairpin);
+ if (fast_leave >= 0)
+ addattr8(&req.n, sizeof(req), IFLA_BRPORT_FAST_LEAVE,
+ fast_leave);
+ if (root_block >= 0)
+ addattr8(&req.n, sizeof(req), IFLA_BRPORT_PROTECT, root_block);
+ if (flood >= 0)
+ addattr8(&req.n, sizeof(req), IFLA_BRPORT_UNICAST_FLOOD, flood);
+ if (mcast_flood >= 0)
+ addattr8(&req.n, sizeof(req), IFLA_BRPORT_MCAST_FLOOD,
+ mcast_flood);
+ if (learning >= 0)
+ addattr8(&req.n, sizeof(req), IFLA_BRPORT_LEARNING, learning);
+ if (learning_sync >= 0)
+ addattr8(&req.n, sizeof(req), IFLA_BRPORT_LEARNING_SYNC,
+ learning_sync);
+
+ if (cost > 0)
+ addattr32(&req.n, sizeof(req), IFLA_BRPORT_COST, cost);
+
+ if (priority >= 0)
+ addattr16(&req.n, sizeof(req), IFLA_BRPORT_PRIORITY, priority);
+
+ if (state >= 0)
+ addattr8(&req.n, sizeof(req), IFLA_BRPORT_STATE, state);
+
+ if (neigh_suppress != -1)
+ addattr8(&req.n, sizeof(req), IFLA_BRPORT_NEIGH_SUPPRESS,
+ neigh_suppress);
+ if (vlan_tunnel != -1)
+ addattr8(&req.n, sizeof(req), IFLA_BRPORT_VLAN_TUNNEL,
+ vlan_tunnel);
+
+ addattr_nest_end(&req.n, nest);
+
+ /* IFLA_AF_SPEC nested attribute. Contains IFLA_BRIDGE_FLAGS that
+ * designates master or self operation and IFLA_BRIDGE_MODE
+ * for hw 'vepa' or 'veb' operation modes. The hwmodes are
+ * only valid in 'self' mode on some devices so far.
+ */
+ if (mode >= 0 || flags > 0) {
+ nest = addattr_nest(&req.n, sizeof(req), IFLA_AF_SPEC);
+
+ if (flags > 0)
+ addattr16(&req.n, sizeof(req), IFLA_BRIDGE_FLAGS, flags);
+
+ if (mode >= 0)
+ addattr16(&req.n, sizeof(req), IFLA_BRIDGE_MODE, mode);
+
+ addattr_nest_end(&req.n, nest);
+ }
+
+ if (rtnl_talk(&rth, &req.n, NULL) < 0)
+ return -1;
+
+ return 0;
+}
+
+static int brlink_show(int argc, char **argv)
+{
+ char *filter_dev = NULL;
+
+ while (argc > 0) {
+ if (strcmp(*argv, "dev") == 0) {
+ NEXT_ARG();
+ if (filter_dev)
+ duparg("dev", *argv);
+ filter_dev = *argv;
+ }
+ argc--; argv++;
+ }
+
+ if (filter_dev) {
+ if ((filter_index = ll_name_to_index(filter_dev)) == 0) {
+ fprintf(stderr, "Cannot find device \"%s\"\n",
+ filter_dev);
+ return -1;
+ }
+ }
+
+ if (show_details) {
+ if (rtnl_wilddump_req_filter(&rth, PF_BRIDGE, RTM_GETLINK,
+ (compress_vlans ?
+ RTEXT_FILTER_BRVLAN_COMPRESSED :
+ RTEXT_FILTER_BRVLAN)) < 0) {
+ perror("Cannon send dump request");
+ exit(1);
+ }
+ } else {
+ if (rtnl_wilddump_request(&rth, PF_BRIDGE, RTM_GETLINK) < 0) {
+ perror("Cannon send dump request");
+ exit(1);
+ }
+ }
+
+ if (rtnl_dump_filter(&rth, print_linkinfo, stdout) < 0) {
+ fprintf(stderr, "Dump terminated\n");
+ exit(1);
+ }
+ return 0;
+}
+
+int do_link(int argc, char **argv)
+{
+ ll_init_map(&rth);
+ if (argc > 0) {
+ if (matches(*argv, "set") == 0 ||
+ matches(*argv, "change") == 0)
+ return brlink_modify(argc-1, argv+1);
+ if (matches(*argv, "show") == 0 ||
+ matches(*argv, "lst") == 0 ||
+ matches(*argv, "list") == 0)
+ return brlink_show(argc-1, argv+1);
+ if (matches(*argv, "help") == 0)
+ usage();
+ } else
+ return brlink_show(0, NULL);
+
+ fprintf(stderr, "Command \"%s\" is unknown, try \"bridge link help\".\n", *argv);
+ exit(-1);
+}