/*
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* Get mdb table with netlink
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <sys/socket.h>
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#include <net/if.h>
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#include <netinet/in.h>
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#include <linux/if_bridge.h>
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#include <linux/if_ether.h>
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#include <string.h>
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#include <arpa/inet.h>
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#include <json_writer.h>
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#include "libnetlink.h"
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#include "br_common.h"
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#include "rt_names.h"
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#include "utils.h"
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#ifndef MDBA_RTA
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#define MDBA_RTA(r) \
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((struct rtattr *)(((char *)(r)) + NLMSG_ALIGN(sizeof(struct br_port_msg))))
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#endif
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static unsigned int filter_index, filter_vlan;
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json_writer_t *jw_global;
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static bool print_mdb_entries = true;
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static bool print_mdb_router = true;
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static void usage(void)
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{
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fprintf(stderr, "Usage: bridge mdb { add | del } dev DEV port PORT grp GROUP [permanent | temp] [vid VID]\n");
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fprintf(stderr, " bridge mdb {show} [ dev DEV ] [ vid VID ]\n");
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exit(-1);
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}
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static bool is_temp_mcast_rtr(__u8 type)
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{
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return type == MDB_RTR_TYPE_TEMP_QUERY || type == MDB_RTR_TYPE_TEMP;
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}
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static void __print_router_port_stats(FILE *f, struct rtattr *pattr)
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{
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struct rtattr *tb[MDBA_ROUTER_PATTR_MAX + 1];
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struct timeval tv;
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__u8 type;
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parse_rtattr(tb, MDBA_ROUTER_PATTR_MAX, MDB_RTR_RTA(RTA_DATA(pattr)),
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RTA_PAYLOAD(pattr) - RTA_ALIGN(sizeof(uint32_t)));
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if (tb[MDBA_ROUTER_PATTR_TIMER]) {
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__jiffies_to_tv(&tv,
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rta_getattr_u32(tb[MDBA_ROUTER_PATTR_TIMER]));
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if (jw_global) {
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char formatted_time[9];
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snprintf(formatted_time, sizeof(formatted_time),
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"%4i.%.2i", (int)tv.tv_sec,
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(int)tv.tv_usec/10000);
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jsonw_string_field(jw_global, "timer", formatted_time);
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} else {
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fprintf(f, " %4i.%.2i",
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(int)tv.tv_sec, (int)tv.tv_usec/10000);
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}
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}
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if (tb[MDBA_ROUTER_PATTR_TYPE]) {
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type = rta_getattr_u8(tb[MDBA_ROUTER_PATTR_TYPE]);
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if (jw_global)
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jsonw_string_field(jw_global, "type",
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is_temp_mcast_rtr(type) ? "temp" : "permanent");
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else
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fprintf(f, " %s",
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is_temp_mcast_rtr(type) ? "temp" : "permanent");
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}
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}
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static void br_print_router_ports(FILE *f, struct rtattr *attr, __u32 brifidx)
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{
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uint32_t *port_ifindex;
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struct rtattr *i;
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int rem;
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rem = RTA_PAYLOAD(attr);
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if (jw_global) {
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jsonw_name(jw_global, ll_index_to_name(brifidx));
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jsonw_start_array(jw_global);
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for (i = RTA_DATA(attr); RTA_OK(i, rem); i = RTA_NEXT(i, rem)) {
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port_ifindex = RTA_DATA(i);
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jsonw_start_object(jw_global);
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jsonw_string_field(jw_global,
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"port",
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ll_index_to_name(*port_ifindex));
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if (show_stats)
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__print_router_port_stats(f, i);
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jsonw_end_object(jw_global);
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}
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jsonw_end_array(jw_global);
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} else {
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if (!show_stats)
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fprintf(f, "router ports on %s: ",
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ll_index_to_name(brifidx));
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for (i = RTA_DATA(attr); RTA_OK(i, rem); i = RTA_NEXT(i, rem)) {
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port_ifindex = RTA_DATA(i);
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if (show_stats) {
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fprintf(f, "router ports on %s: %s",
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ll_index_to_name(brifidx),
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ll_index_to_name(*port_ifindex));
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__print_router_port_stats(f, i);
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fprintf(f, "\n");
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} else{
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fprintf(f, "%s ",
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ll_index_to_name(*port_ifindex));
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}
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}
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if (!show_stats)
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fprintf(f, "\n");
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}
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}
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static void start_json_mdb_flags_array(bool *mdb_flags)
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{
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if (*mdb_flags)
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return;
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jsonw_name(jw_global, "flags");
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jsonw_start_array(jw_global);
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*mdb_flags = true;
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}
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static void print_mdb_entry(FILE *f, int ifindex, struct br_mdb_entry *e,
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struct nlmsghdr *n, struct rtattr **tb)
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{
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SPRINT_BUF(abuf);
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const void *src;
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int af;
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bool mdb_flags = false;
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if (filter_vlan && e->vid != filter_vlan)
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return;
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af = e->addr.proto == htons(ETH_P_IP) ? AF_INET : AF_INET6;
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src = af == AF_INET ? (const void *)&e->addr.u.ip4 :
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(const void *)&e->addr.u.ip6;
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if (jw_global)
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jsonw_start_object(jw_global);
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if (n->nlmsg_type == RTM_DELMDB) {
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if (jw_global)
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jsonw_string_field(jw_global, "opCode", "deleted");
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else
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fprintf(f, "Deleted ");
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}
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if (jw_global) {
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jsonw_string_field(jw_global, "dev", ll_index_to_name(ifindex));
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jsonw_string_field(jw_global,
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"port",
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ll_index_to_name(e->ifindex));
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jsonw_string_field(jw_global, "grp", inet_ntop(af, src,
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abuf, sizeof(abuf)));
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jsonw_string_field(jw_global, "state",
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(e->state & MDB_PERMANENT) ? "permanent" : "temp");
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if (e->flags & MDB_FLAGS_OFFLOAD) {
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start_json_mdb_flags_array(&mdb_flags);
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jsonw_string(jw_global, "offload");
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}
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if (mdb_flags)
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jsonw_end_array(jw_global);
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} else{
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fprintf(f, "dev %s port %s grp %s %s %s",
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ll_index_to_name(ifindex),
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ll_index_to_name(e->ifindex),
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inet_ntop(af, src, abuf, sizeof(abuf)),
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(e->state & MDB_PERMANENT) ? "permanent" : "temp",
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(e->flags & MDB_FLAGS_OFFLOAD) ? "offload" : "");
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}
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if (e->vid) {
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if (jw_global)
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jsonw_uint_field(jw_global, "vid", e->vid);
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else
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fprintf(f, " vid %hu", e->vid);
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}
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if (show_stats && tb && tb[MDBA_MDB_EATTR_TIMER]) {
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struct timeval tv;
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__jiffies_to_tv(&tv, rta_getattr_u32(tb[MDBA_MDB_EATTR_TIMER]));
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if (jw_global) {
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char formatted_time[9];
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snprintf(formatted_time, sizeof(formatted_time),
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"%4i.%.2i", (int)tv.tv_sec,
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(int)tv.tv_usec/10000);
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jsonw_string_field(jw_global, "timer", formatted_time);
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} else {
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fprintf(f, "%4i.%.2i", (int)tv.tv_sec,
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(int)tv.tv_usec/10000);
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}
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}
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if (jw_global)
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jsonw_end_object(jw_global);
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else
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fprintf(f, "\n");
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}
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static void br_print_mdb_entry(FILE *f, int ifindex, struct rtattr *attr,
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struct nlmsghdr *n)
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{
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struct rtattr *etb[MDBA_MDB_EATTR_MAX + 1];
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struct br_mdb_entry *e;
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struct rtattr *i;
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int rem;
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rem = RTA_PAYLOAD(attr);
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for (i = RTA_DATA(attr); RTA_OK(i, rem); i = RTA_NEXT(i, rem)) {
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e = RTA_DATA(i);
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parse_rtattr(etb, MDBA_MDB_EATTR_MAX, MDB_RTA(RTA_DATA(i)),
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RTA_PAYLOAD(i) - RTA_ALIGN(sizeof(*e)));
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print_mdb_entry(f, ifindex, e, n, etb);
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}
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}
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int print_mdb(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
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{
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FILE *fp = arg;
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struct br_port_msg *r = NLMSG_DATA(n);
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int len = n->nlmsg_len;
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struct rtattr *tb[MDBA_MAX+1], *i;
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if (n->nlmsg_type != RTM_GETMDB && n->nlmsg_type != RTM_NEWMDB && n->nlmsg_type != RTM_DELMDB) {
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fprintf(stderr, "Not RTM_GETMDB, RTM_NEWMDB or RTM_DELMDB: %08x %08x %08x\n",
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n->nlmsg_len, n->nlmsg_type, n->nlmsg_flags);
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return 0;
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}
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len -= NLMSG_LENGTH(sizeof(*r));
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if (len < 0) {
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fprintf(stderr, "BUG: wrong nlmsg len %d\n", len);
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return -1;
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}
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if (filter_index && filter_index != r->ifindex)
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return 0;
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parse_rtattr(tb, MDBA_MAX, MDBA_RTA(r), n->nlmsg_len - NLMSG_LENGTH(sizeof(*r)));
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if (tb[MDBA_MDB] && print_mdb_entries) {
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int rem = RTA_PAYLOAD(tb[MDBA_MDB]);
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for (i = RTA_DATA(tb[MDBA_MDB]); RTA_OK(i, rem); i = RTA_NEXT(i, rem))
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br_print_mdb_entry(fp, r->ifindex, i, n);
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}
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if (tb[MDBA_ROUTER] && print_mdb_router) {
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if (n->nlmsg_type == RTM_GETMDB) {
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if (show_details)
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br_print_router_ports(fp, tb[MDBA_ROUTER],
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r->ifindex);
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} else {
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uint32_t *port_ifindex;
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i = RTA_DATA(tb[MDBA_ROUTER]);
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port_ifindex = RTA_DATA(i);
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if (n->nlmsg_type == RTM_DELMDB) {
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if (jw_global)
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jsonw_string_field(jw_global,
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"opCode",
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"deleted");
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else
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fprintf(fp, "Deleted ");
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}
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if (jw_global) {
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jsonw_name(jw_global,
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ll_index_to_name(r->ifindex));
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jsonw_start_array(jw_global);
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jsonw_start_object(jw_global);
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jsonw_string_field(jw_global, "port",
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ll_index_to_name(*port_ifindex));
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jsonw_end_object(jw_global);
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jsonw_end_array(jw_global);
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} else {
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fprintf(fp, "router port dev %s master %s\n",
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ll_index_to_name(*port_ifindex),
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ll_index_to_name(r->ifindex));
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}
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}
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}
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if (!jw_global)
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fflush(fp);
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return 0;
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}
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static int mdb_show(int argc, char **argv)
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{
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char *filter_dev = NULL;
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while (argc > 0) {
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if (strcmp(*argv, "dev") == 0) {
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NEXT_ARG();
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if (filter_dev)
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duparg("dev", *argv);
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filter_dev = *argv;
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} else if (strcmp(*argv, "vid") == 0) {
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NEXT_ARG();
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if (filter_vlan)
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duparg("vid", *argv);
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filter_vlan = atoi(*argv);
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}
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argc--; argv++;
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}
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if (filter_dev) {
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filter_index = if_nametoindex(filter_dev);
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if (filter_index == 0) {
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fprintf(stderr, "Cannot find device \"%s\"\n",
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filter_dev);
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return -1;
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}
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}
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/* get mdb entries*/
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if (rtnl_wilddump_request(&rth, PF_BRIDGE, RTM_GETMDB) < 0) {
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perror("Cannot send dump request");
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return -1;
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}
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if (!json_output) {
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/* Normal output */
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if (rtnl_dump_filter(&rth, print_mdb, stdout) < 0) {
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fprintf(stderr, "Dump terminated\n");
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return -1;
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}
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return 0;
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}
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/* Json output */
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jw_global = jsonw_new(stdout);
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jsonw_pretty(jw_global, 1);
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jsonw_start_object(jw_global);
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jsonw_name(jw_global, "mdb");
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jsonw_start_array(jw_global);
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/* print mdb entries */
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print_mdb_entries = true;
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print_mdb_router = false;
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if (rtnl_dump_filter(&rth, print_mdb, stdout) < 0) {
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fprintf(stderr, "Dump terminated\n");
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return -1;
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}
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jsonw_end_array(jw_global);
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/* get router ports */
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if (rtnl_wilddump_request(&rth, PF_BRIDGE, RTM_GETMDB) < 0) {
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perror("Cannot send dump request");
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return -1;
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}
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jsonw_name(jw_global, "router");
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jsonw_start_object(jw_global);
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/* print router ports */
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print_mdb_entries = false;
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print_mdb_router = true;
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if (rtnl_dump_filter(&rth, print_mdb, stdout) < 0) {
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fprintf(stderr, "Dump terminated\n");
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return -1;
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}
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jsonw_end_object(jw_global);
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jsonw_end_object(jw_global);
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jsonw_destroy(&jw_global);
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return 0;
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}
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static int mdb_modify(int cmd, int flags, int argc, char **argv)
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{
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struct {
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struct nlmsghdr n;
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struct br_port_msg bpm;
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char buf[1024];
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} req = {
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.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct br_port_msg)),
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.n.nlmsg_flags = NLM_F_REQUEST | flags,
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.n.nlmsg_type = cmd,
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.bpm.family = PF_BRIDGE,
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};
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struct br_mdb_entry entry = {};
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char *d = NULL, *p = NULL, *grp = NULL;
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short vid = 0;
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while (argc > 0) {
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if (strcmp(*argv, "dev") == 0) {
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NEXT_ARG();
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d = *argv;
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} else if (strcmp(*argv, "grp") == 0) {
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NEXT_ARG();
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grp = *argv;
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} else if (strcmp(*argv, "port") == 0) {
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NEXT_ARG();
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p = *argv;
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} else if (strcmp(*argv, "permanent") == 0) {
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if (cmd == RTM_NEWMDB)
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entry.state |= MDB_PERMANENT;
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} else if (strcmp(*argv, "temp") == 0) {
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;/* nothing */
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} else if (strcmp(*argv, "vid") == 0) {
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NEXT_ARG();
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vid = atoi(*argv);
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} else {
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if (matches(*argv, "help") == 0)
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usage();
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}
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argc--; argv++;
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}
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if (d == NULL || grp == NULL || p == NULL) {
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fprintf(stderr, "Device, group address and port name are required arguments.\n");
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return -1;
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}
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req.bpm.ifindex = ll_name_to_index(d);
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if (req.bpm.ifindex == 0) {
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fprintf(stderr, "Cannot find device \"%s\"\n", d);
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return -1;
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}
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entry.ifindex = ll_name_to_index(p);
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if (entry.ifindex == 0) {
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fprintf(stderr, "Cannot find device \"%s\"\n", p);
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return -1;
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}
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if (!inet_pton(AF_INET, grp, &entry.addr.u.ip4)) {
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if (!inet_pton(AF_INET6, grp, &entry.addr.u.ip6)) {
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fprintf(stderr, "Invalid address \"%s\"\n", grp);
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return -1;
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} else
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entry.addr.proto = htons(ETH_P_IPV6);
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} else
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entry.addr.proto = htons(ETH_P_IP);
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entry.vid = vid;
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addattr_l(&req.n, sizeof(req), MDBA_SET_ENTRY, &entry, sizeof(entry));
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if (rtnl_talk(&rth, &req.n, NULL, 0) < 0)
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return -1;
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return 0;
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}
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int do_mdb(int argc, char **argv)
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{
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ll_init_map(&rth);
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if (argc > 0) {
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if (matches(*argv, "add") == 0)
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return mdb_modify(RTM_NEWMDB, NLM_F_CREATE|NLM_F_EXCL, argc-1, argv+1);
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if (matches(*argv, "delete") == 0)
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return mdb_modify(RTM_DELMDB, 0, argc-1, argv+1);
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if (matches(*argv, "show") == 0 ||
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matches(*argv, "lst") == 0 ||
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matches(*argv, "list") == 0)
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return mdb_show(argc-1, argv+1);
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if (matches(*argv, "help") == 0)
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usage();
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} else
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return mdb_show(0, NULL);
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fprintf(stderr, "Command \"%s\" is unknown, try \"bridge mdb help\".\n", *argv);
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exit(-1);
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}
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