blob: 24c4903542bf0123d33fef267260973c2ebde73c [file] [log] [blame] [edit]
/*
* Get mdb table with netlink
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/socket.h>
#include <net/if.h>
#include <netinet/in.h>
#include <linux/if_bridge.h>
#include <linux/if_ether.h>
#include <string.h>
#include <arpa/inet.h>
#include "libnetlink.h"
#include "br_common.h"
#include "rt_names.h"
#include "utils.h"
#ifndef MDBA_RTA
#define MDBA_RTA(r) \
((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct br_port_msg))))
#endif
static unsigned int filter_index;
static void usage(void)
{
fprintf(stderr, "Usage: bridge mdb { add | del } dev DEV port PORT grp GROUP [permanent | temp] [vid VID]\n");
fprintf(stderr, " bridge mdb {show} [ dev DEV ]\n");
exit(-1);
}
static void br_print_router_ports(FILE *f, struct rtattr *attr)
{
uint32_t *port_ifindex;
struct rtattr *i;
int rem;
rem = RTA_PAYLOAD(attr);
for (i = RTA_DATA(attr); RTA_OK(i, rem); i = RTA_NEXT(i, rem)) {
port_ifindex = RTA_DATA(i);
fprintf(f, "%s ", ll_index_to_name(*port_ifindex));
}
fprintf(f, "\n");
}
static void print_mdb_entry(FILE *f, int ifindex, struct br_mdb_entry *e,
struct nlmsghdr *n)
{
SPRINT_BUF(abuf);
const void *src;
int af;
af = e->addr.proto == htons(ETH_P_IP) ? AF_INET : AF_INET6;
src = af == AF_INET ? (const void *)&e->addr.u.ip4 :
(const void *)&e->addr.u.ip6;
if (n->nlmsg_type == RTM_DELMDB)
fprintf(f, "Deleted ");
fprintf(f, "dev %s port %s grp %s %s", ll_index_to_name(ifindex),
ll_index_to_name(e->ifindex),
inet_ntop(af, src, abuf, sizeof(abuf)),
(e->state & MDB_PERMANENT) ? "permanent" : "temp");
if (e->vid)
fprintf(f, " vid %hu", e->vid);
fprintf(f, "\n");
}
static void br_print_mdb_entry(FILE *f, int ifindex, struct rtattr *attr,
struct nlmsghdr *n)
{
struct rtattr *i;
int rem;
struct br_mdb_entry *e;
rem = RTA_PAYLOAD(attr);
for (i = RTA_DATA(attr); RTA_OK(i, rem); i = RTA_NEXT(i, rem)) {
e = RTA_DATA(i);
print_mdb_entry(f, ifindex, e, n);
}
}
int print_mdb(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
{
FILE *fp = arg;
struct br_port_msg *r = NLMSG_DATA(n);
int len = n->nlmsg_len;
struct rtattr *tb[MDBA_MAX+1], *i;
if (n->nlmsg_type != RTM_GETMDB && n->nlmsg_type != RTM_NEWMDB && n->nlmsg_type != RTM_DELMDB) {
fprintf(stderr, "Not RTM_GETMDB, RTM_NEWMDB or RTM_DELMDB: %08x %08x %08x\n",
n->nlmsg_len, n->nlmsg_type, n->nlmsg_flags);
return 0;
}
len -= NLMSG_LENGTH(sizeof(*r));
if (len < 0) {
fprintf(stderr, "BUG: wrong nlmsg len %d\n", len);
return -1;
}
if (filter_index && filter_index != r->ifindex)
return 0;
parse_rtattr(tb, MDBA_MAX, MDBA_RTA(r), n->nlmsg_len - NLMSG_LENGTH(sizeof(*r)));
if (tb[MDBA_MDB]) {
int rem = RTA_PAYLOAD(tb[MDBA_MDB]);
for (i = RTA_DATA(tb[MDBA_MDB]); RTA_OK(i, rem); i = RTA_NEXT(i, rem))
br_print_mdb_entry(fp, r->ifindex, i, n);
}
if (tb[MDBA_ROUTER]) {
if (n->nlmsg_type == RTM_GETMDB) {
if (show_details) {
fprintf(fp, "router ports on %s: ",
ll_index_to_name(r->ifindex));
br_print_router_ports(fp, tb[MDBA_ROUTER]);
}
} else {
uint32_t *port_ifindex;
i = RTA_DATA(tb[MDBA_ROUTER]);
port_ifindex = RTA_DATA(i);
if (n->nlmsg_type == RTM_DELMDB)
fprintf(fp, "Deleted ");
fprintf(fp, "router port dev %s master %s\n",
ll_index_to_name(*port_ifindex),
ll_index_to_name(r->ifindex));
}
}
fflush(fp);
return 0;
}
static int mdb_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 = if_nametoindex(filter_dev);
if (filter_index == 0) {
fprintf(stderr, "Cannot find device \"%s\"\n",
filter_dev);
return -1;
}
}
if (rtnl_wilddump_request(&rth, PF_BRIDGE, RTM_GETMDB) < 0) {
perror("Cannot send dump request");
return -1;
}
if (rtnl_dump_filter(&rth, print_mdb, stdout) < 0) {
fprintf(stderr, "Dump terminated\n");
return -1;
}
return 0;
}
static int mdb_modify(int cmd, int flags, int argc, char **argv)
{
struct {
struct nlmsghdr n;
struct br_port_msg bpm;
char buf[1024];
} req;
struct br_mdb_entry entry;
char *d = NULL, *p = NULL, *grp = NULL;
short vid = 0;
memset(&req, 0, sizeof(req));
memset(&entry, 0, sizeof(entry));
req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct br_port_msg));
req.n.nlmsg_flags = NLM_F_REQUEST|flags;
req.n.nlmsg_type = cmd;
req.bpm.family = PF_BRIDGE;
while (argc > 0) {
if (strcmp(*argv, "dev") == 0) {
NEXT_ARG();
d = *argv;
} else if (strcmp(*argv, "grp") == 0) {
NEXT_ARG();
grp = *argv;
} else if (strcmp(*argv, "port") == 0) {
NEXT_ARG();
p = *argv;
} else if (strcmp(*argv, "permanent") == 0) {
if (cmd == RTM_NEWMDB)
entry.state |= MDB_PERMANENT;
} else if (strcmp(*argv, "temp") == 0) {
;/* nothing */
} else if (strcmp(*argv, "vid") == 0) {
NEXT_ARG();
vid = atoi(*argv);
} else {
if (matches(*argv, "help") == 0)
usage();
}
argc--; argv++;
}
if (d == NULL || grp == NULL || p == NULL) {
fprintf(stderr, "Device, group address and port name are required arguments.\n");
return -1;
}
req.bpm.ifindex = ll_name_to_index(d);
if (req.bpm.ifindex == 0) {
fprintf(stderr, "Cannot find device \"%s\"\n", d);
return -1;
}
entry.ifindex = ll_name_to_index(p);
if (entry.ifindex == 0) {
fprintf(stderr, "Cannot find device \"%s\"\n", p);
return -1;
}
if (!inet_pton(AF_INET, grp, &entry.addr.u.ip4)) {
if (!inet_pton(AF_INET6, grp, &entry.addr.u.ip6)) {
fprintf(stderr, "Invalid address \"%s\"\n", grp);
return -1;
} else
entry.addr.proto = htons(ETH_P_IPV6);
} else
entry.addr.proto = htons(ETH_P_IP);
entry.vid = vid;
addattr_l(&req.n, sizeof(req), MDBA_SET_ENTRY, &entry, sizeof(entry));
if (rtnl_talk(&rth, &req.n, NULL, 0) < 0)
return -1;
return 0;
}
int do_mdb(int argc, char **argv)
{
ll_init_map(&rth);
if (argc > 0) {
if (matches(*argv, "add") == 0)
return mdb_modify(RTM_NEWMDB, NLM_F_CREATE|NLM_F_EXCL, argc-1, argv+1);
if (matches(*argv, "delete") == 0)
return mdb_modify(RTM_DELMDB, 0, argc-1, argv+1);
if (matches(*argv, "show") == 0 ||
matches(*argv, "lst") == 0 ||
matches(*argv, "list") == 0)
return mdb_show(argc-1, argv+1);
if (matches(*argv, "help") == 0)
usage();
} else
return mdb_show(0, NULL);
fprintf(stderr, "Command \"%s\" is unknown, try \"bridge mdb help\".\n", *argv);
exit(-1);
}