blob: 3188b854f20169c5a10ae944cf6bc47b1000dcbf [file] [log] [blame]
#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 "libnetlink.h"
#include "utils.h"
#include "br_common.h"
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",
};
extern char *if_indextoname (unsigned int __ifindex, char *__ifname);
static void print_link_flags(FILE *fp, unsigned 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 ? "," : ""); }
_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)
fprintf(fp, "%x", flags);
fprintf(fp, "> ");
}
static const char *oper_states[] = {
"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]))
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 >= sizeof(hw_mode)/sizeof(hw_mode[0]))
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];
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);
if (tb[IFLA_IFNAME] == NULL) {
fprintf(stderr, "BUG: nil ifname\n");
return -1;
}
if (n->nlmsg_type == RTM_DELLINK)
fprintf(fp, "Deleted ");
fprintf(fp, "%d: %s ", ifi->ifi_index,
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_LINK]) {
SPRINT_BUF(b1);
int iflink = rta_getattr_u32(tb[IFLA_LINK]);
if (iflink == 0)
fprintf(fp, "@NONE: ");
else
fprintf(fp, "@%s: ",
if_indextoname(iflink, b1));
} else
fprintf(fp, ": ");
print_link_flags(fp, ifi->ifi_flags);
if (tb[IFLA_MTU])
fprintf(fp, "mtu %u ", rta_getattr_u32(tb[IFLA_MTU]));
if (tb[IFLA_MASTER])
fprintf(fp, "master %s ",
if_indextoname(rta_getattr_u32(tb[IFLA_MASTER]), b1));
if (tb[IFLA_PROTINFO]) {
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]));
}
} 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 (tb[IFLA_BRIDGE_MODE])
print_hwmode(fp, rta_getattr_u16(tb[IFLA_BRIDGE_MODE]));
}
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, " [ hwmode {vepa | veb} ]\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;
char *d = NULL;
__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 = BRIDGE_FLAGS_MASTER;
struct rtattr *nest;
memset(&req, 0, sizeof(req));
req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
req.n.nlmsg_flags = NLM_F_REQUEST;
req.n.nlmsg_type = RTM_SETLINK;
req.ifm.ifi_family = PF_BRIDGE;
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))
exit(-1);
} else if (strcmp(*argv, "hairpin") == 0) {
NEXT_ARG();
if (!on_off("hairping", &hairpin, *argv))
exit(-1);
} else if (strcmp(*argv, "fastleave") == 0) {
NEXT_ARG();
if (!on_off("fastleave", &fast_leave, *argv))
exit(-1);
} else if (strcmp(*argv, "root_block") == 0) {
NEXT_ARG();
if (!on_off("root_block", &root_block, *argv))
exit(-1);
} else if (strcmp(*argv, "cost")) {
NEXT_ARG();
cost = atoi(*argv);
} else if (strcmp(*argv, "priority")) {
NEXT_ARG();
priority = atoi(*argv);
} else if (strcmp(*argv, "state")) {
NEXT_ARG();
state = atoi(*argv);
} else if (strcmp(*argv, "hwmode")) {
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");
exit(-1);
}
} else {
usage();
}
argc--; argv++;
}
if (d == NULL) {
fprintf(stderr, "Device is a required argument.\n");
exit(-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);
exit(-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 (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);
addattr_nest_end(&req.n, nest);
/* IFLA_AF_SPEC nested attribute. Contains IFLA_BRIDGE_FLAGS that
* designates master or self operation as well as 'vepa' or 'veb'
* operation modes. These are only valid in 'self' mode on some
* devices so far. Thus we only need to include the flags attribute
* if we are setting the hw mode.
*/
if (mode >= 0) {
nest = addattr_nest(&req.n, sizeof(req), IFLA_AF_SPEC);
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, 0, 0, NULL) < 0)
exit(2);
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 (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);
}