| /* |
| * Get/set/delete fdb table with netlink |
| * |
| * TODO: merge/replace this with ip neighbour |
| * |
| * Authors: Stephen Hemminger <shemminger@vyatta.com> |
| */ |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <unistd.h> |
| #include <netdb.h> |
| #include <time.h> |
| #include <fcntl.h> |
| #include <sys/socket.h> |
| #include <sys/time.h> |
| #include <net/if.h> |
| #include <netinet/in.h> |
| #include <linux/if_bridge.h> |
| #include <linux/if_ether.h> |
| #include <linux/neighbour.h> |
| #include <string.h> |
| #include <limits.h> |
| |
| #include "libnetlink.h" |
| #include "br_common.h" |
| #include "rt_names.h" |
| #include "utils.h" |
| |
| static unsigned int filter_index; |
| |
| static void usage(void) |
| { |
| fprintf(stderr, "Usage: bridge fdb { add | append | del | replace } ADDR dev DEV\n" |
| " [ self ] [ master ] [ use ] [ router ]\n" |
| " [ local | temp ] [ dst IPADDR ] [ vlan VID ]\n" |
| " [ port PORT] [ vni VNI ] [ via DEV ]\n"); |
| fprintf(stderr, " bridge fdb [ show [ br BRDEV ] [ brport DEV ] ]\n"); |
| exit(-1); |
| } |
| |
| static const char *state_n2a(unsigned s) |
| { |
| static char buf[32]; |
| |
| if (s & NUD_PERMANENT) |
| return "permanent"; |
| |
| if (s & NUD_NOARP) |
| return "static"; |
| |
| if (s & NUD_STALE) |
| return "stale"; |
| |
| if (s & NUD_REACHABLE) |
| return ""; |
| |
| sprintf(buf, "state=%#x", s); |
| return buf; |
| } |
| |
| int print_fdb(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg) |
| { |
| FILE *fp = arg; |
| struct ndmsg *r = NLMSG_DATA(n); |
| int len = n->nlmsg_len; |
| struct rtattr * tb[NDA_MAX+1]; |
| |
| if (n->nlmsg_type != RTM_NEWNEIGH && n->nlmsg_type != RTM_DELNEIGH) { |
| fprintf(stderr, "Not RTM_NEWNEIGH: %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 (r->ndm_family != AF_BRIDGE) |
| return 0; |
| |
| if (filter_index && filter_index != r->ndm_ifindex) |
| return 0; |
| |
| parse_rtattr(tb, NDA_MAX, NDA_RTA(r), |
| n->nlmsg_len - NLMSG_LENGTH(sizeof(*r))); |
| |
| if (n->nlmsg_type == RTM_DELNEIGH) |
| fprintf(fp, "Deleted "); |
| |
| if (tb[NDA_LLADDR]) { |
| SPRINT_BUF(b1); |
| fprintf(fp, "%s ", |
| ll_addr_n2a(RTA_DATA(tb[NDA_LLADDR]), |
| RTA_PAYLOAD(tb[NDA_LLADDR]), |
| ll_index_to_type(r->ndm_ifindex), |
| b1, sizeof(b1))); |
| } |
| |
| if (!filter_index && r->ndm_ifindex) |
| fprintf(fp, "dev %s ", ll_index_to_name(r->ndm_ifindex)); |
| |
| if (tb[NDA_DST]) { |
| SPRINT_BUF(abuf); |
| int family = AF_INET; |
| |
| if (RTA_PAYLOAD(tb[NDA_DST]) == sizeof(struct in6_addr)) |
| family = AF_INET6; |
| |
| fprintf(fp, "dst %s ", |
| format_host(family, |
| RTA_PAYLOAD(tb[NDA_DST]), |
| RTA_DATA(tb[NDA_DST]), |
| abuf, sizeof(abuf))); |
| } |
| |
| if (tb[NDA_VLAN]) { |
| __u16 vid = rta_getattr_u16(tb[NDA_VLAN]); |
| fprintf(fp, "vlan %hu ", vid); |
| } |
| |
| if (tb[NDA_PORT]) |
| fprintf(fp, "port %d ", ntohs(rta_getattr_u16(tb[NDA_PORT]))); |
| if (tb[NDA_VNI]) |
| fprintf(fp, "vni %d ", rta_getattr_u32(tb[NDA_VNI])); |
| if (tb[NDA_IFINDEX]) { |
| unsigned int ifindex = rta_getattr_u32(tb[NDA_IFINDEX]); |
| |
| if (ifindex) { |
| char ifname[IF_NAMESIZE]; |
| |
| if (!tb[NDA_LINK_NETNSID] && |
| if_indextoname(ifindex, ifname)) |
| fprintf(fp, "via %s ", ifname); |
| else |
| fprintf(fp, "via ifindex %u ", ifindex); |
| } |
| } |
| if (tb[NDA_LINK_NETNSID]) |
| fprintf(fp, "link-netnsid %d ", |
| rta_getattr_u32(tb[NDA_LINK_NETNSID])); |
| |
| if (show_stats && tb[NDA_CACHEINFO]) { |
| struct nda_cacheinfo *ci = RTA_DATA(tb[NDA_CACHEINFO]); |
| int hz = get_user_hz(); |
| |
| fprintf(fp, "used %d/%d ", ci->ndm_used/hz, |
| ci->ndm_updated/hz); |
| } |
| if (r->ndm_flags & NTF_SELF) |
| fprintf(fp, "self "); |
| if (tb[NDA_MASTER]) |
| fprintf(fp, "master %s ", |
| ll_index_to_name(rta_getattr_u32(tb[NDA_MASTER]))); |
| else if (r->ndm_flags & NTF_MASTER) |
| fprintf(fp, "master "); |
| if (r->ndm_flags & NTF_ROUTER) |
| fprintf(fp, "router "); |
| if (r->ndm_flags & NTF_EXT_LEARNED) |
| fprintf(fp, "offload "); |
| |
| fprintf(fp, "%s\n", state_n2a(r->ndm_state)); |
| fflush(fp); |
| |
| return 0; |
| } |
| |
| static int fdb_show(int argc, char **argv) |
| { |
| struct { |
| struct nlmsghdr n; |
| struct ifinfomsg ifm; |
| char buf[256]; |
| } req; |
| |
| char *filter_dev = NULL; |
| char *br = NULL; |
| int msg_size = sizeof(struct ifinfomsg); |
| |
| memset(&req, 0, sizeof(req)); |
| req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg)); |
| req.ifm.ifi_family = PF_BRIDGE; |
| |
| while (argc > 0) { |
| if ((strcmp(*argv, "brport") == 0) || strcmp(*argv, "dev") == 0) { |
| NEXT_ARG(); |
| filter_dev = *argv; |
| } else if (strcmp(*argv, "br") == 0) { |
| NEXT_ARG(); |
| br = *argv; |
| } else { |
| if (matches(*argv, "help") == 0) |
| usage(); |
| } |
| argc--; argv++; |
| } |
| |
| if (br) { |
| int br_ifindex = ll_name_to_index(br); |
| if (br_ifindex == 0) { |
| fprintf(stderr, "Cannot find bridge device \"%s\"\n", br); |
| return -1; |
| } |
| addattr32(&req.n, sizeof(req), IFLA_MASTER, br_ifindex); |
| msg_size += RTA_LENGTH(4); |
| } |
| |
| /*we'll keep around filter_dev for older kernels */ |
| if (filter_dev) { |
| filter_index = if_nametoindex(filter_dev); |
| if (filter_index == 0) { |
| fprintf(stderr, "Cannot find device \"%s\"\n", |
| filter_dev); |
| return -1; |
| } |
| req.ifm.ifi_index = filter_index; |
| } |
| |
| if (rtnl_dump_request(&rth, RTM_GETNEIGH, &req.ifm, msg_size) < 0) { |
| perror("Cannot send dump request"); |
| exit(1); |
| } |
| |
| if (rtnl_dump_filter(&rth, print_fdb, stdout) < 0) { |
| fprintf(stderr, "Dump terminated\n"); |
| exit(1); |
| } |
| |
| return 0; |
| } |
| |
| static int fdb_modify(int cmd, int flags, int argc, char **argv) |
| { |
| struct { |
| struct nlmsghdr n; |
| struct ndmsg ndm; |
| char buf[256]; |
| } req; |
| char *addr = NULL; |
| char *d = NULL; |
| char abuf[ETH_ALEN]; |
| int dst_ok = 0; |
| inet_prefix dst; |
| unsigned long port = 0; |
| unsigned long vni = ~0; |
| unsigned int via = 0; |
| char *endptr; |
| short vid = -1; |
| |
| memset(&req, 0, sizeof(req)); |
| |
| req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); |
| req.n.nlmsg_flags = NLM_F_REQUEST|flags; |
| req.n.nlmsg_type = cmd; |
| req.ndm.ndm_family = PF_BRIDGE; |
| req.ndm.ndm_state = NUD_NOARP; |
| |
| while (argc > 0) { |
| if (strcmp(*argv, "dev") == 0) { |
| NEXT_ARG(); |
| d = *argv; |
| } else if (strcmp(*argv, "dst") == 0) { |
| NEXT_ARG(); |
| if (dst_ok) |
| duparg2("dst", *argv); |
| get_addr(&dst, *argv, preferred_family); |
| dst_ok = 1; |
| } else if (strcmp(*argv, "port") == 0) { |
| |
| NEXT_ARG(); |
| port = strtoul(*argv, &endptr, 0); |
| if (endptr && *endptr) { |
| struct servent *pse; |
| |
| pse = getservbyname(*argv, "udp"); |
| if (!pse) |
| invarg("invalid port\n", *argv); |
| port = ntohs(pse->s_port); |
| } else if (port > 0xffff) |
| invarg("invalid port\n", *argv); |
| } else if (strcmp(*argv, "vni") == 0) { |
| NEXT_ARG(); |
| vni = strtoul(*argv, &endptr, 0); |
| if ((endptr && *endptr) || |
| (vni >> 24) || vni == ULONG_MAX) |
| invarg("invalid VNI\n", *argv); |
| } else if (strcmp(*argv, "via") == 0) { |
| NEXT_ARG(); |
| via = if_nametoindex(*argv); |
| if (via == 0) |
| invarg("invalid device\n", *argv); |
| } else if (strcmp(*argv, "self") == 0) { |
| req.ndm.ndm_flags |= NTF_SELF; |
| } else if (matches(*argv, "master") == 0) { |
| req.ndm.ndm_flags |= NTF_MASTER; |
| } else if (matches(*argv, "router") == 0) { |
| req.ndm.ndm_flags |= NTF_ROUTER; |
| } else if (matches(*argv, "local") == 0|| |
| matches(*argv, "permanent") == 0) { |
| req.ndm.ndm_state |= NUD_PERMANENT; |
| } else if (matches(*argv, "temp") == 0) { |
| req.ndm.ndm_state |= NUD_REACHABLE; |
| } else if (matches(*argv, "vlan") == 0) { |
| if (vid >= 0) |
| duparg2("vlan", *argv); |
| NEXT_ARG(); |
| vid = atoi(*argv); |
| } else if (matches(*argv, "use") == 0) { |
| req.ndm.ndm_flags |= NTF_USE; |
| } else { |
| if (strcmp(*argv, "to") == 0) { |
| NEXT_ARG(); |
| } |
| if (matches(*argv, "help") == 0) |
| usage(); |
| if (addr) |
| duparg2("to", *argv); |
| addr = *argv; |
| } |
| argc--; argv++; |
| } |
| |
| if (d == NULL || addr == NULL) { |
| fprintf(stderr, "Device and address are required arguments.\n"); |
| return -1; |
| } |
| |
| /* Assume self */ |
| if (!(req.ndm.ndm_flags&(NTF_SELF|NTF_MASTER))) |
| req.ndm.ndm_flags |= NTF_SELF; |
| |
| /* Assume permanent */ |
| if (!(req.ndm.ndm_state&(NUD_PERMANENT|NUD_REACHABLE))) |
| req.ndm.ndm_state |= NUD_PERMANENT; |
| |
| if (sscanf(addr, "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx", |
| abuf, abuf+1, abuf+2, |
| abuf+3, abuf+4, abuf+5) != 6) { |
| fprintf(stderr, "Invalid mac address %s\n", addr); |
| return -1; |
| } |
| |
| addattr_l(&req.n, sizeof(req), NDA_LLADDR, abuf, ETH_ALEN); |
| if (dst_ok) |
| addattr_l(&req.n, sizeof(req), NDA_DST, &dst.data, dst.bytelen); |
| |
| if (vid >= 0) |
| addattr16(&req.n, sizeof(req), NDA_VLAN, vid); |
| |
| if (port) { |
| unsigned short dport; |
| |
| dport = htons((unsigned short)port); |
| addattr16(&req.n, sizeof(req), NDA_PORT, dport); |
| } |
| if (vni != ~0) |
| addattr32(&req.n, sizeof(req), NDA_VNI, vni); |
| if (via) |
| addattr32(&req.n, sizeof(req), NDA_IFINDEX, via); |
| |
| req.ndm.ndm_ifindex = ll_name_to_index(d); |
| if (req.ndm.ndm_ifindex == 0) { |
| fprintf(stderr, "Cannot find device \"%s\"\n", d); |
| return -1; |
| } |
| |
| if (rtnl_talk(&rth, &req.n, NULL, 0) < 0) |
| return -1; |
| |
| return 0; |
| } |
| |
| int do_fdb(int argc, char **argv) |
| { |
| ll_init_map(&rth); |
| |
| if (argc > 0) { |
| if (matches(*argv, "add") == 0) |
| return fdb_modify(RTM_NEWNEIGH, NLM_F_CREATE|NLM_F_EXCL, argc-1, argv+1); |
| if (matches(*argv, "append") == 0) |
| return fdb_modify(RTM_NEWNEIGH, NLM_F_CREATE|NLM_F_APPEND, argc-1, argv+1); |
| if (matches(*argv, "replace") == 0) |
| return fdb_modify(RTM_NEWNEIGH, NLM_F_CREATE|NLM_F_REPLACE, argc-1, argv+1); |
| if (matches(*argv, "delete") == 0) |
| return fdb_modify(RTM_DELNEIGH, 0, argc-1, argv+1); |
| if (matches(*argv, "show") == 0 || |
| matches(*argv, "lst") == 0 || |
| matches(*argv, "list") == 0) |
| return fdb_show(argc-1, argv+1); |
| if (matches(*argv, "help") == 0) |
| usage(); |
| } else |
| return fdb_show(0, NULL); |
| |
| fprintf(stderr, "Command \"%s\" is unknown, try \"bridge fdb help\".\n", *argv); |
| exit(-1); |
| } |