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-rw-r--r--bridge/mdb.c588
1 files changed, 588 insertions, 0 deletions
diff --git a/bridge/mdb.c b/bridge/mdb.c
new file mode 100644
index 0000000..d3afc90
--- /dev/null
+++ b/bridge/mdb.c
@@ -0,0 +1,588 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * 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 "utils.h"
+#include "br_common.h"
+#include "rt_names.h"
+#include "json_print.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, filter_vlan;
+
+static void usage(void)
+{
+ fprintf(stderr,
+ "Usage: bridge mdb { add | del } dev DEV port PORT grp GROUP [src SOURCE] [permanent | temp] [vid VID]\n"
+ " bridge mdb {show} [ dev DEV ] [ vid VID ]\n");
+ exit(-1);
+}
+
+static bool is_temp_mcast_rtr(__u8 type)
+{
+ return type == MDB_RTR_TYPE_TEMP_QUERY || type == MDB_RTR_TYPE_TEMP;
+}
+
+static const char *format_timer(__u32 ticks, int align)
+{
+ struct timeval tv;
+ static char tbuf[32];
+
+ __jiffies_to_tv(&tv, ticks);
+ if (align)
+ snprintf(tbuf, sizeof(tbuf), "%4lu.%.2lu",
+ (unsigned long)tv.tv_sec,
+ (unsigned long)tv.tv_usec / 10000);
+ else
+ snprintf(tbuf, sizeof(tbuf), "%lu.%.2lu",
+ (unsigned long)tv.tv_sec,
+ (unsigned long)tv.tv_usec / 10000);
+
+ return tbuf;
+}
+
+void br_print_router_port_stats(struct rtattr *pattr)
+{
+ struct rtattr *tb[MDBA_ROUTER_PATTR_MAX + 1];
+
+ parse_rtattr(tb, MDBA_ROUTER_PATTR_MAX, MDB_RTR_RTA(RTA_DATA(pattr)),
+ RTA_PAYLOAD(pattr) - RTA_ALIGN(sizeof(uint32_t)));
+
+ if (tb[MDBA_ROUTER_PATTR_TIMER]) {
+ __u32 timer = rta_getattr_u32(tb[MDBA_ROUTER_PATTR_TIMER]);
+
+ print_string(PRINT_ANY, "timer", " %s",
+ format_timer(timer, 1));
+ }
+
+ if (tb[MDBA_ROUTER_PATTR_TYPE]) {
+ __u8 type = rta_getattr_u8(tb[MDBA_ROUTER_PATTR_TYPE]);
+
+ print_string(PRINT_ANY, "type", " %s",
+ is_temp_mcast_rtr(type) ? "temp" : "permanent");
+ }
+}
+
+static void br_print_router_ports(FILE *f, struct rtattr *attr,
+ const char *brifname)
+{
+ int rem = RTA_PAYLOAD(attr);
+ struct rtattr *i;
+
+ if (is_json_context())
+ open_json_array(PRINT_JSON, brifname);
+ else if (!show_stats)
+ fprintf(f, "router ports on %s: ", brifname);
+
+ for (i = RTA_DATA(attr); RTA_OK(i, rem); i = RTA_NEXT(i, rem)) {
+ uint32_t *port_ifindex = RTA_DATA(i);
+ const char *port_ifname = ll_index_to_name(*port_ifindex);
+
+ if (is_json_context()) {
+ open_json_object(NULL);
+ print_string(PRINT_JSON, "port", NULL, port_ifname);
+
+ if (show_stats)
+ br_print_router_port_stats(i);
+ close_json_object();
+ } else if (show_stats) {
+ fprintf(f, "router ports on %s: %s",
+ brifname, port_ifname);
+
+ br_print_router_port_stats(i);
+ fprintf(f, "\n");
+ } else {
+ fprintf(f, "%s ", port_ifname);
+ }
+ }
+
+ if (!show_stats)
+ print_nl();
+
+ close_json_array(PRINT_JSON, NULL);
+}
+
+static void print_src_entry(struct rtattr *src_attr, int af, const char *sep)
+{
+ struct rtattr *stb[MDBA_MDB_SRCATTR_MAX + 1];
+ SPRINT_BUF(abuf);
+ const char *addr;
+ __u32 timer_val;
+
+ parse_rtattr_nested(stb, MDBA_MDB_SRCATTR_MAX, src_attr);
+ if (!stb[MDBA_MDB_SRCATTR_ADDRESS] || !stb[MDBA_MDB_SRCATTR_TIMER])
+ return;
+
+ addr = inet_ntop(af, RTA_DATA(stb[MDBA_MDB_SRCATTR_ADDRESS]), abuf,
+ sizeof(abuf));
+ if (!addr)
+ return;
+ timer_val = rta_getattr_u32(stb[MDBA_MDB_SRCATTR_TIMER]);
+
+ open_json_object(NULL);
+ print_string(PRINT_FP, NULL, "%s", sep);
+ print_color_string(PRINT_ANY, ifa_family_color(af),
+ "address", "%s", addr);
+ print_string(PRINT_ANY, "timer", "/%s", format_timer(timer_val, 0));
+ close_json_object();
+}
+
+static void print_mdb_entry(FILE *f, int ifindex, const struct br_mdb_entry *e,
+ struct nlmsghdr *n, struct rtattr **tb)
+{
+ const void *grp, *src;
+ const char *addr;
+ SPRINT_BUF(abuf);
+ const char *dev;
+ int af;
+
+ if (filter_vlan && e->vid != filter_vlan)
+ return;
+
+ if (!e->addr.proto) {
+ af = AF_PACKET;
+ grp = &e->addr.u.mac_addr;
+ } else if (e->addr.proto == htons(ETH_P_IP)) {
+ af = AF_INET;
+ grp = &e->addr.u.ip4;
+ } else {
+ af = AF_INET6;
+ grp = &e->addr.u.ip6;
+ }
+ dev = ll_index_to_name(ifindex);
+
+ open_json_object(NULL);
+
+ print_int(PRINT_JSON, "index", NULL, ifindex);
+ print_color_string(PRINT_ANY, COLOR_IFNAME, "dev", "dev %s", dev);
+ print_string(PRINT_ANY, "port", " port %s",
+ ll_index_to_name(e->ifindex));
+
+ /* The ETH_ALEN argument is ignored for all cases but AF_PACKET */
+ addr = rt_addr_n2a_r(af, ETH_ALEN, grp, abuf, sizeof(abuf));
+ if (!addr)
+ return;
+
+ print_color_string(PRINT_ANY, ifa_family_color(af),
+ "grp", " grp %s", addr);
+
+ if (tb && tb[MDBA_MDB_EATTR_SOURCE]) {
+ src = (const void *)RTA_DATA(tb[MDBA_MDB_EATTR_SOURCE]);
+ print_color_string(PRINT_ANY, ifa_family_color(af),
+ "src", " src %s",
+ inet_ntop(af, src, abuf, sizeof(abuf)));
+ }
+ print_string(PRINT_ANY, "state", " %s",
+ (e->state & MDB_PERMANENT) ? "permanent" : "temp");
+ if (show_details && tb) {
+ if (tb[MDBA_MDB_EATTR_GROUP_MODE]) {
+ __u8 mode = rta_getattr_u8(tb[MDBA_MDB_EATTR_GROUP_MODE]);
+
+ print_string(PRINT_ANY, "filter_mode", " filter_mode %s",
+ mode == MCAST_INCLUDE ? "include" :
+ "exclude");
+ }
+ if (tb[MDBA_MDB_EATTR_SRC_LIST]) {
+ struct rtattr *i, *attr = tb[MDBA_MDB_EATTR_SRC_LIST];
+ const char *sep = " ";
+ int rem;
+
+ open_json_array(PRINT_ANY, is_json_context() ?
+ "source_list" :
+ " source_list");
+ rem = RTA_PAYLOAD(attr);
+ for (i = RTA_DATA(attr); RTA_OK(i, rem);
+ i = RTA_NEXT(i, rem)) {
+ print_src_entry(i, af, sep);
+ sep = ",";
+ }
+ close_json_array(PRINT_JSON, NULL);
+ }
+ if (tb[MDBA_MDB_EATTR_RTPROT]) {
+ __u8 rtprot = rta_getattr_u8(tb[MDBA_MDB_EATTR_RTPROT]);
+ SPRINT_BUF(rtb);
+
+ print_string(PRINT_ANY, "protocol", " proto %s ",
+ rtnl_rtprot_n2a(rtprot, rtb, sizeof(rtb)));
+ }
+ }
+
+ open_json_array(PRINT_JSON, "flags");
+ if (e->flags & MDB_FLAGS_OFFLOAD)
+ print_string(PRINT_ANY, NULL, " %s", "offload");
+ if (e->flags & MDB_FLAGS_FAST_LEAVE)
+ print_string(PRINT_ANY, NULL, " %s", "fast_leave");
+ if (e->flags & MDB_FLAGS_STAR_EXCL)
+ print_string(PRINT_ANY, NULL, " %s", "added_by_star_ex");
+ if (e->flags & MDB_FLAGS_BLOCKED)
+ print_string(PRINT_ANY, NULL, " %s", "blocked");
+ close_json_array(PRINT_JSON, NULL);
+
+ if (e->vid)
+ print_uint(PRINT_ANY, "vid", " vid %u", e->vid);
+
+ if (show_stats && tb && tb[MDBA_MDB_EATTR_TIMER]) {
+ __u32 timer = rta_getattr_u32(tb[MDBA_MDB_EATTR_TIMER]);
+
+ print_string(PRINT_ANY, "timer", " %s",
+ format_timer(timer, 1));
+ }
+
+ print_nl();
+ close_json_object();
+}
+
+static void br_print_mdb_entry(FILE *f, int ifindex, struct rtattr *attr,
+ struct nlmsghdr *n)
+{
+ struct rtattr *etb[MDBA_MDB_EATTR_MAX + 1];
+ struct br_mdb_entry *e;
+ struct rtattr *i;
+ int rem;
+
+ rem = RTA_PAYLOAD(attr);
+ for (i = RTA_DATA(attr); RTA_OK(i, rem); i = RTA_NEXT(i, rem)) {
+ e = RTA_DATA(i);
+ parse_rtattr_flags(etb, MDBA_MDB_EATTR_MAX, MDB_RTA(RTA_DATA(i)),
+ RTA_PAYLOAD(i) - RTA_ALIGN(sizeof(*e)),
+ NLA_F_NESTED);
+ print_mdb_entry(f, ifindex, e, n, etb);
+ }
+}
+
+static void print_mdb_entries(FILE *fp, struct nlmsghdr *n,
+ int ifindex, struct rtattr *mdb)
+{
+ int rem = RTA_PAYLOAD(mdb);
+ struct rtattr *i;
+
+ for (i = RTA_DATA(mdb); RTA_OK(i, rem); i = RTA_NEXT(i, rem))
+ br_print_mdb_entry(fp, ifindex, i, n);
+}
+
+static void print_router_entries(FILE *fp, struct nlmsghdr *n,
+ int ifindex, struct rtattr *router)
+{
+ const char *brifname = ll_index_to_name(ifindex);
+
+ if (n->nlmsg_type == RTM_GETMDB) {
+ if (show_details)
+ br_print_router_ports(fp, router, brifname);
+ } else {
+ struct rtattr *i = RTA_DATA(router);
+ uint32_t *port_ifindex = RTA_DATA(i);
+ const char *port_name = ll_index_to_name(*port_ifindex);
+
+ if (is_json_context()) {
+ open_json_array(PRINT_JSON, brifname);
+ open_json_object(NULL);
+
+ print_string(PRINT_JSON, "port", NULL,
+ port_name);
+ close_json_object();
+ close_json_array(PRINT_JSON, NULL);
+ } else {
+ fprintf(fp, "router port dev %s master %s\n",
+ port_name, brifname);
+ }
+ }
+}
+
+static int __parse_mdb_nlmsg(struct nlmsghdr *n, struct rtattr **tb)
+{
+ struct br_port_msg *r = NLMSG_DATA(n);
+ int len = n->nlmsg_len;
+
+ 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)));
+
+ return 1;
+}
+
+static int print_mdbs(struct nlmsghdr *n, void *arg)
+{
+ struct br_port_msg *r = NLMSG_DATA(n);
+ struct rtattr *tb[MDBA_MAX+1];
+ FILE *fp = arg;
+ int ret;
+
+ ret = __parse_mdb_nlmsg(n, tb);
+ if (ret != 1)
+ return ret;
+
+ if (tb[MDBA_MDB])
+ print_mdb_entries(fp, n, r->ifindex, tb[MDBA_MDB]);
+
+ return 0;
+}
+
+static int print_rtrs(struct nlmsghdr *n, void *arg)
+{
+ struct br_port_msg *r = NLMSG_DATA(n);
+ struct rtattr *tb[MDBA_MAX+1];
+ FILE *fp = arg;
+ int ret;
+
+ ret = __parse_mdb_nlmsg(n, tb);
+ if (ret != 1)
+ return ret;
+
+ if (tb[MDBA_ROUTER])
+ print_router_entries(fp, n, r->ifindex, tb[MDBA_ROUTER]);
+
+ return 0;
+}
+
+int print_mdb_mon(struct nlmsghdr *n, void *arg)
+{
+ struct br_port_msg *r = NLMSG_DATA(n);
+ struct rtattr *tb[MDBA_MAX+1];
+ FILE *fp = arg;
+ int ret;
+
+ ret = __parse_mdb_nlmsg(n, tb);
+ if (ret != 1)
+ return ret;
+
+ print_headers(fp, "[MDB]");
+
+ if (n->nlmsg_type == RTM_DELMDB)
+ print_bool(PRINT_ANY, "deleted", "Deleted ", true);
+
+ if (tb[MDBA_MDB])
+ print_mdb_entries(fp, n, r->ifindex, tb[MDBA_MDB]);
+
+ if (tb[MDBA_ROUTER])
+ print_router_entries(fp, n, r->ifindex, tb[MDBA_ROUTER]);
+
+ 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;
+ } else if (strcmp(*argv, "vid") == 0) {
+ NEXT_ARG();
+ if (filter_vlan)
+ duparg("vid", *argv);
+ filter_vlan = atoi(*argv);
+ }
+ argc--; argv++;
+ }
+
+ if (filter_dev) {
+ filter_index = ll_name_to_index(filter_dev);
+ if (!filter_index)
+ return nodev(filter_dev);
+ }
+
+ new_json_obj(json);
+ open_json_object(NULL);
+
+ /* get mdb entries */
+ if (rtnl_mdbdump_req(&rth, PF_BRIDGE) < 0) {
+ perror("Cannot send dump request");
+ return -1;
+ }
+
+ open_json_array(PRINT_JSON, "mdb");
+ if (rtnl_dump_filter(&rth, print_mdbs, stdout) < 0) {
+ fprintf(stderr, "Dump terminated\n");
+ return -1;
+ }
+ close_json_array(PRINT_JSON, NULL);
+
+ /* get router ports */
+ if (rtnl_mdbdump_req(&rth, PF_BRIDGE) < 0) {
+ perror("Cannot send dump request");
+ return -1;
+ }
+
+ open_json_object("router");
+ if (rtnl_dump_filter(&rth, print_rtrs, stdout) < 0) {
+ fprintf(stderr, "Dump terminated\n");
+ return -1;
+ }
+ close_json_object();
+
+ close_json_object();
+ delete_json_obj();
+ fflush(stdout);
+
+ return 0;
+}
+
+static int mdb_parse_grp(const char *grp, struct br_mdb_entry *e)
+{
+ if (inet_pton(AF_INET, grp, &e->addr.u.ip4)) {
+ e->addr.proto = htons(ETH_P_IP);
+ return 0;
+ }
+ if (inet_pton(AF_INET6, grp, &e->addr.u.ip6)) {
+ e->addr.proto = htons(ETH_P_IPV6);
+ return 0;
+ }
+ if (ll_addr_a2n((char *)e->addr.u.mac_addr, sizeof(e->addr.u.mac_addr),
+ grp) == ETH_ALEN) {
+ e->addr.proto = 0;
+ return 0;
+ }
+
+ return -1;
+}
+
+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 = {
+ .n.nlmsg_len = NLMSG_LENGTH(sizeof(struct br_port_msg)),
+ .n.nlmsg_flags = NLM_F_REQUEST | flags,
+ .n.nlmsg_type = cmd,
+ .bpm.family = PF_BRIDGE,
+ };
+ char *d = NULL, *p = NULL, *grp = NULL, *src = NULL;
+ struct br_mdb_entry entry = {};
+ short vid = 0;
+
+ 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 (strcmp(*argv, "src") == 0) {
+ NEXT_ARG();
+ src = *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)
+ return nodev(d);
+
+ entry.ifindex = ll_name_to_index(p);
+ if (!entry.ifindex)
+ return nodev(p);
+
+ if (mdb_parse_grp(grp, &entry)) {
+ fprintf(stderr, "Invalid address \"%s\"\n", grp);
+ return -1;
+ }
+
+ entry.vid = vid;
+ addattr_l(&req.n, sizeof(req), MDBA_SET_ENTRY, &entry, sizeof(entry));
+ if (src) {
+ struct rtattr *nest = addattr_nest(&req.n, sizeof(req),
+ MDBA_SET_ENTRY_ATTRS);
+ struct in6_addr src_ip6;
+ __be32 src_ip4;
+
+ nest->rta_type |= NLA_F_NESTED;
+ if (!inet_pton(AF_INET, src, &src_ip4)) {
+ if (!inet_pton(AF_INET6, src, &src_ip6)) {
+ fprintf(stderr, "Invalid source address \"%s\"\n", src);
+ return -1;
+ }
+ addattr_l(&req.n, sizeof(req), MDBE_ATTR_SOURCE, &src_ip6, sizeof(src_ip6));
+ } else {
+ addattr32(&req.n, sizeof(req), MDBE_ATTR_SOURCE, src_ip4);
+ }
+ addattr_nest_end(&req.n, nest);
+ }
+
+ if (rtnl_talk(&rth, &req.n, NULL) < 0)
+ return -1;
+
+ return 0;
+}
+
+int do_mdb(int argc, char **argv)
+{
+ ll_init_map(&rth);
+ timestamp = 0;
+
+ 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);
+}