| /* |
| * Get/set/delete fdb table with netlink |
| * |
| * Authors: Stephen Hemminger <shemminger@vyatta.com> |
| */ |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <unistd.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 "libnetlink.h" |
| #include "br_common.h" |
| #include "utils.h" |
| |
| int filter_index; |
| |
| static void usage(void) |
| { |
| fprintf(stderr, "Usage: br fdb { add | del | replace } ADDR dev DEV\n"); |
| fprintf(stderr, " br fdb {show} [ dev DEV ]\n"); |
| exit(-1); |
| } |
| |
| static const char *state_n2a(unsigned s) |
| { |
| static char buf[32]; |
| |
| if (s & NUD_PERMANENT) |
| return "local"; |
| |
| if (s & NUD_NOARP) |
| return "static"; |
| |
| if (s & NUD_STALE) |
| return "stale"; |
| |
| if (s & NUD_REACHABLE) |
| return ""; |
| |
| sprintf(buf, "state=%#x", s); |
| return buf; |
| } |
| |
| static char *fmt_time(char *b, size_t l, unsigned long tick) |
| { |
| static int hz; |
| |
| if (hz == 0) |
| hz = __get_user_hz(); |
| |
| snprintf(b, l, "%lu.%02lu", tick / hz, ((tick % hz) * hz) / 100); |
| return b; |
| } |
| |
| int print_fdb(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg) |
| { |
| struct ndmsg *r = NLMSG_DATA(n); |
| int len = n->nlmsg_len; |
| struct rtattr * tb[NDA_MAX+1]; |
| const __u8 *addr = NULL; |
| char b1[32]; |
| |
| 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) |
| printf("Deleted "); |
| |
| if (tb[NDA_LLADDR]) |
| addr = RTA_DATA(tb[NDA_LLADDR]); |
| else { |
| fprintf(stderr, "missing lladdr\n"); |
| return -1; |
| } |
| |
| printf("%s\t%.2x:%.2x:%.2x:%.2x:%.2x:%.2x\t%s", |
| ll_index_to_name(r->ndm_ifindex), |
| addr[0], addr[1], addr[2], |
| addr[3], addr[4], addr[5], |
| state_n2a(r->ndm_state)); |
| |
| if (show_stats && tb[NDA_CACHEINFO]) { |
| struct nda_cacheinfo *ci = RTA_DATA(tb[NDA_CACHEINFO]); |
| |
| printf("\t%8s", fmt_time(b1, sizeof(b1), ci->ndm_updated)); |
| printf(" %8s", fmt_time(b1, sizeof(b1), ci->ndm_used)); |
| } |
| printf("\n"); |
| |
| return 0; |
| } |
| |
| static int fdb_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 = if_nametoindex(filter_dev)) == 0) { |
| fprintf(stderr, "Cannot find device \"%s\"\n", filter_dev); |
| return -1; |
| } |
| } |
| |
| if (rtnl_wilddump_request(&rth, PF_BRIDGE, RTM_GETNEIGH) < 0) { |
| perror("Cannot send dump request"); |
| exit(1); |
| } |
| |
| printf("port\tmac addr\t\tflags%s\n", |
| show_stats ? "\t updated used" : ""); |
| |
| if (rtnl_dump_filter(&rth, print_fdb, NULL) < 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]; |
| |
| 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, "local") == 0) { |
| req.ndm.ndm_state = NUD_PERMANENT; |
| } else if (strcmp(*argv, "temp") == 0) { |
| req.ndm.ndm_state = NUD_REACHABLE; |
| } else { |
| if (strcmp(*argv, "to") == 0) { |
| NEXT_ARG(); |
| } |
| if (matches(*argv, "help") == 0) { |
| NEXT_ARG(); |
| } |
| if (addr) |
| duparg2("to", *argv); |
| addr = *argv; |
| } |
| argc--; argv++; |
| } |
| |
| if (d == NULL || addr == NULL) { |
| fprintf(stderr, "Device and address are required arguments.\n"); |
| exit(-1); |
| } |
| |
| 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); |
| exit(-1); |
| } |
| |
| addattr_l(&req.n, sizeof(req), NDA_LLADDR, abuf, ETH_ALEN); |
| |
| 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, 0, 0, NULL) < 0) |
| exit(2); |
| |
| 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, "change") == 0) |
| return fdb_modify(RTM_NEWNEIGH, NLM_F_REPLACE, 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 \"ip neigh help\".\n", *argv); |
| exit(-1); |
| } |