/* SPDX-License-Identifier: GPL-2.0 */
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <time.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <netinet/in.h>
#include <linux/if.h>
#include <linux/if_bridge.h>
#include <string.h>
#include <stdbool.h>
#include "json_print.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_LEARNING] = "learning",
[BR_STATE_FORWARDING] = "forwarding",
[BR_STATE_BLOCKING] = "blocking",
};
static const char *hw_mode[] = {
"VEB", "VEPA"
};
static void print_link_flags(FILE *fp, unsigned int flags, unsigned int mdown)
{
open_json_array(PRINT_ANY, is_json_context() ? "flags" : "<");
if (flags & IFF_UP && !(flags & IFF_RUNNING))
print_string(PRINT_ANY, NULL,
flags ? "%s," : "%s", "NO-CARRIER");
flags &= ~IFF_RUNNING;
#define _PF(f) if (flags&IFF_##f) { \
flags &= ~IFF_##f ; \
print_string(PRINT_ANY, NULL, flags ? "%s," : "%s", #f); }
_PF(LOOPBACK);
_PF(BROADCAST);
_PF(POINTOPOINT);
_PF(MULTICAST);
_PF(NOARP);
_PF(ALLMULTI);
_PF(PROMISC);
_PF(MASTER);
_PF(SLAVE);
_PF(DEBUG);
_PF(DYNAMIC);
_PF(AUTOMEDIA);
_PF(PORTSEL);
_PF(NOTRAILERS);
_PF(UP);
_PF(LOWER_UP);
_PF(DORMANT);
_PF(ECHO);
#undef _PF
if (flags)
print_hex(PRINT_ANY, NULL, "%x", flags);
if (mdown)
print_string(PRINT_ANY, NULL, ",%s", "M-DOWN");
close_json_array(PRINT_ANY, "> ");
}
static void print_portstate(__u8 state)
{
if (state <= BR_STATE_BLOCKING)
print_string(PRINT_ANY, "state",
"state %s ", port_states[state]);
else
print_uint(PRINT_ANY, "state",
"state (%d) ", state);
}
static void print_onoff(FILE *fp, const char *flag, __u8 val)
{
if (is_json_context())
print_bool(PRINT_JSON, flag, NULL, val);
else
fprintf(fp, "%s %s ", flag, val ? "on" : "off");
}
static void print_hwmode(__u16 mode)
{
if (mode >= ARRAY_SIZE(hw_mode))
print_0xhex(PRINT_ANY, "hwmode",
"hwmode %#llx ", mode);
else
print_string(PRINT_ANY, "hwmode",
"hwmode %s ", hw_mode[mode]);
}
static void print_protinfo(FILE *fp, struct rtattr *attr)
{
if (attr->rta_type & NLA_F_NESTED) {
struct rtattr *prtb[IFLA_BRPORT_MAX + 1];
parse_rtattr_nested(prtb, IFLA_BRPORT_MAX, attr);
if (prtb[IFLA_BRPORT_STATE])
print_portstate(rta_getattr_u8(prtb[IFLA_BRPORT_STATE]));
if (prtb[IFLA_BRPORT_PRIORITY])
print_uint(PRINT_ANY, "priority",
"priority %u ",
rta_getattr_u16(prtb[IFLA_BRPORT_PRIORITY]));
if (prtb[IFLA_BRPORT_COST])
print_uint(PRINT_ANY, "cost",
"cost %u ",
rta_getattr_u32(prtb[IFLA_BRPORT_COST]));
if (!show_details)
return;
if (!is_json_context())
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_MCAST_TO_UCAST])
print_onoff(fp, "mcast_to_unicast",
rta_getattr_u8(prtb[IFLA_BRPORT_MCAST_TO_UCAST]));
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]));
if (prtb[IFLA_BRPORT_BACKUP_PORT]) {
int ifidx;
ifidx = rta_getattr_u32(prtb[IFLA_BRPORT_BACKUP_PORT]);
print_string(PRINT_ANY,
"backup_port", "backup_port %s ",
ll_index_to_name(ifidx));
}
if (prtb[IFLA_BRPORT_ISOLATED])
print_onoff(fp, "isolated",
rta_getattr_u8(prtb[IFLA_BRPORT_ISOLATED]));
} else
print_portstate(rta_getattr_u8(attr));
}
/*
* This is reported by HW devices that have some bridging
* capabilities.
*/
static void print_af_spec(struct rtattr *attr, int ifindex)
{
struct rtattr *aftb[IFLA_BRIDGE_MAX+1];
parse_rtattr_nested(aftb, IFLA_BRIDGE_MAX, attr);
if (aftb[IFLA_BRIDGE_MODE])
print_hwmode(rta_getattr_u16(aftb[IFLA_BRIDGE_MODE]));
if (!show_details)
return;
if (aftb[IFLA_BRIDGE_VLAN_INFO])
print_vlan_info(aftb[IFLA_BRIDGE_VLAN_INFO], ifindex);
}
int print_linkinfo(struct nlmsghdr *n, void *arg)
{
FILE *fp = arg;
struct ifinfomsg *ifi = NLMSG_DATA(n);
struct rtattr *tb[IFLA_MAX+1];
unsigned int m_flag = 0;
int len = n->nlmsg_len;
const char *name;
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;
if (filter_index && filter_index != ifi->ifi_index)
return 0;
parse_rtattr_flags(tb, IFLA_MAX, IFLA_RTA(ifi), len, NLA_F_NESTED);
name = get_ifname_rta(ifi->ifi_index, tb[IFLA_IFNAME]);
if (!name)
return -1;
open_json_object(NULL);
if (n->nlmsg_type == RTM_DELLINK)
print_bool(PRINT_ANY, "deleted", "Deleted ", true);
print_int(PRINT_ANY, "ifindex", "%d: ", ifi->ifi_index);
m_flag = print_name_and_link("%s: ", name, tb);
print_link_flags(fp, ifi->ifi_flags, m_flag);
if (tb[IFLA_MTU])
print_int(PRINT_ANY,
"mtu", "mtu %u ",
rta_getattr_u32(tb[IFLA_MTU]));
if (tb[IFLA_MASTER]) {
int master = rta_getattr_u32(tb[IFLA_MASTER]);
print_string(PRINT_ANY, "master", "master %s ",
ll_index_to_name(master));
}
if (tb[IFLA_PROTINFO])
print_protinfo(fp, tb[IFLA_PROTINFO]);
if (tb[IFLA_AF_SPEC])
print_af_spec(tb[IFLA_AF_SPEC], ifi->ifi_index);
print_string(PRINT_FP, NULL, "%s", "\n");
close_json_object();
fflush(fp);
return 0;
}
static void usage(void)
{
fprintf(stderr,
"Usage: bridge link set dev DEV [ cost COST ] [ priority PRIO ] [ state STATE ]\n"
" [ guard {on | off} ]\n"
" [ hairpin {on | off} ]\n"
" [ fastleave {on | off} ]\n"
" [ root_block {on | off} ]\n"
" [ learning {on | off} ]\n"
" [ learning_sync {on | off} ]\n"
" [ flood {on | off} ]\n"
" [ mcast_flood {on | off} ]\n"
" [ mcast_to_unicast {on | off} ]\n"
" [ neigh_suppress {on | off} ]\n"
" [ vlan_tunnel {on | off} ]\n"
" [ isolated {on | off} ]\n"
" [ hwmode {vepa | veb} ]\n"
" [ backup_port DEVICE ] [ nobackup_port ]\n"
" [ self ] [ master ]\n"
" 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;
int backup_port_idx = -1;
__s8 neigh_suppress = -1;
__s8 learning = -1;
__s8 learning_sync = -1;
__s8 flood = -1;
__s8 vlan_tunnel = -1;
__s8 mcast_flood = -1;
__s8 mcast_to_unicast = -1;
__s8 isolated = -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("hairpin", &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, "mcast_to_unicast") == 0) {
NEXT_ARG();
if (!on_off("mcast_to_unicast", &mcast_to_unicast, *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 (strcasecmp(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 if (strcmp(*argv, "isolated") == 0) {
NEXT_ARG();
if (!on_off("isolated", &isolated, *argv))
return -1;
} else if (strcmp(*argv, "backup_port") == 0) {
NEXT_ARG();
backup_port_idx = ll_name_to_index(*argv);
if (!backup_port_idx) {
fprintf(stderr, "Error: device %s does not exist\n",
*argv);
return -1;
}
} else if (strcmp(*argv, "nobackup_port") == 0) {
backup_port_idx = 0;
} 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 (mcast_to_unicast >= 0)
addattr8(&req.n, sizeof(req), IFLA_BRPORT_MCAST_TO_UCAST,
mcast_to_unicast);
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);
if (isolated != -1)
addattr8(&req.n, sizeof(req), IFLA_BRPORT_ISOLATED, isolated);
if (backup_port_idx != -1)
addattr32(&req.n, sizeof(req), IFLA_BRPORT_BACKUP_PORT,
backup_port_idx);
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) {
filter_index = ll_name_to_index(filter_dev);
if (!filter_index)
return nodev(filter_dev);
}
if (show_details) {
if (rtnl_linkdump_req_filter(&rth, PF_BRIDGE,
(compress_vlans ?
RTEXT_FILTER_BRVLAN_COMPRESSED :
RTEXT_FILTER_BRVLAN)) < 0) {
perror("Cannon send dump request");
exit(1);
}
} else {
if (rtnl_linkdump_req(&rth, PF_BRIDGE) < 0) {
perror("Cannon send dump request");
exit(1);
}
}
new_json_obj(json);
if (rtnl_dump_filter(&rth, print_linkinfo, stdout) < 0) {
fprintf(stderr, "Dump terminated\n");
exit(1);
}
delete_json_obj();
fflush(stdout);
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);
}