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-rw-r--r--ip/ipneigh.c769
1 files changed, 769 insertions, 0 deletions
diff --git a/ip/ipneigh.c b/ip/ipneigh.c
new file mode 100644
index 0000000..61b0a4a
--- /dev/null
+++ b/ip/ipneigh.c
@@ -0,0 +1,769 @@
+/*
+ * ipneigh.c "ip neigh".
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
+ *
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <string.h>
+#include <sys/time.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <netinet/ip.h>
+
+#include "rt_names.h"
+#include "utils.h"
+#include "ip_common.h"
+#include "json_print.h"
+
+#define NUD_VALID (NUD_PERMANENT|NUD_NOARP|NUD_REACHABLE|NUD_PROBE|NUD_STALE|NUD_DELAY)
+#define MAX_ROUNDS 10
+
+static struct
+{
+ int family;
+ int index;
+ int state;
+ int unused_only;
+ inet_prefix pfx;
+ int flushed;
+ char *flushb;
+ int flushp;
+ int flushe;
+ int master;
+ int protocol;
+ __u8 ndm_flags;
+} filter;
+
+static void usage(void) __attribute__((noreturn));
+
+static void usage(void)
+{
+ fprintf(stderr,
+ "Usage: ip neigh { add | del | change | replace }\n"
+ " { ADDR [ lladdr LLADDR ] [ nud STATE ] proxy ADDR }\n"
+ " [ dev DEV ] [ router ] [ use ] [ managed ] [ extern_learn ]\n"
+ " [ protocol PROTO ]\n"
+ "\n"
+ " ip neigh { show | flush } [ proxy ] [ to PREFIX ] [ dev DEV ] [ nud STATE ]\n"
+ " [ vrf NAME ] [ nomaster ]\n"
+ " ip neigh get { ADDR | proxy ADDR } dev DEV\n"
+ "\n"
+ "STATE := { delay | failed | incomplete | noarp | none |\n"
+ " permanent | probe | reachable | stale }\n");
+ exit(-1);
+}
+
+static int nud_state_a2n(unsigned int *state, const char *arg)
+{
+ if (matches(arg, "permanent") == 0)
+ *state = NUD_PERMANENT;
+ else if (matches(arg, "reachable") == 0)
+ *state = NUD_REACHABLE;
+ else if (strcmp(arg, "noarp") == 0)
+ *state = NUD_NOARP;
+ else if (strcmp(arg, "none") == 0)
+ *state = NUD_NONE;
+ else if (strcmp(arg, "stale") == 0)
+ *state = NUD_STALE;
+ else if (strcmp(arg, "incomplete") == 0)
+ *state = NUD_INCOMPLETE;
+ else if (strcmp(arg, "delay") == 0)
+ *state = NUD_DELAY;
+ else if (strcmp(arg, "probe") == 0)
+ *state = NUD_PROBE;
+ else if (matches(arg, "failed") == 0)
+ *state = NUD_FAILED;
+ else {
+ if (get_unsigned(state, arg, 0))
+ return -1;
+ if (*state >= 0x100 || (*state&((*state)-1)))
+ return -1;
+ }
+ return 0;
+}
+
+static int flush_update(void)
+{
+ if (rtnl_send_check(&rth, filter.flushb, filter.flushp) < 0) {
+ perror("Failed to send flush request");
+ return -1;
+ }
+ filter.flushp = 0;
+ return 0;
+}
+
+
+static int ipneigh_modify(int cmd, int flags, int argc, char **argv)
+{
+ struct {
+ struct nlmsghdr n;
+ struct ndmsg ndm;
+ char buf[256];
+ } req = {
+ .n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)),
+ .n.nlmsg_flags = NLM_F_REQUEST | flags,
+ .n.nlmsg_type = cmd,
+ .ndm.ndm_family = preferred_family,
+ .ndm.ndm_state = NUD_PERMANENT,
+ };
+ __u32 ext_flags = 0;
+ char *dev = NULL;
+ int dst_ok = 0;
+ int dev_ok = 0;
+ int lladdr_ok = 0;
+ char *lla = NULL;
+ inet_prefix dst;
+
+ while (argc > 0) {
+ if (matches(*argv, "lladdr") == 0) {
+ NEXT_ARG();
+ if (lladdr_ok)
+ duparg("lladdr", *argv);
+ lla = *argv;
+ lladdr_ok = 1;
+ } else if (strcmp(*argv, "nud") == 0) {
+ unsigned int state;
+
+ NEXT_ARG();
+ if (nud_state_a2n(&state, *argv))
+ invarg("nud state is bad", *argv);
+ req.ndm.ndm_state = state;
+ } else if (matches(*argv, "proxy") == 0) {
+ NEXT_ARG();
+ if (matches(*argv, "help") == 0)
+ usage();
+ if (dst_ok)
+ duparg("address", *argv);
+ get_addr(&dst, *argv, preferred_family);
+ dst_ok = 1;
+ dev_ok = 1;
+ req.ndm.ndm_flags |= NTF_PROXY;
+ } else if (strcmp(*argv, "router") == 0) {
+ req.ndm.ndm_flags |= NTF_ROUTER;
+ } else if (strcmp(*argv, "use") == 0) {
+ req.ndm.ndm_flags |= NTF_USE;
+ } else if (strcmp(*argv, "managed") == 0) {
+ ext_flags |= NTF_EXT_MANAGED;
+ req.ndm.ndm_state = NUD_NONE;
+ } else if (matches(*argv, "extern_learn") == 0) {
+ req.ndm.ndm_flags |= NTF_EXT_LEARNED;
+ } else if (strcmp(*argv, "dev") == 0) {
+ NEXT_ARG();
+ dev = *argv;
+ dev_ok = 1;
+ } else if (matches(*argv, "protocol") == 0) {
+ __u32 proto;
+
+ NEXT_ARG();
+ if (rtnl_rtprot_a2n(&proto, *argv))
+ invarg("\"protocol\" value is invalid\n", *argv);
+ if (addattr8(&req.n, sizeof(req), NDA_PROTOCOL, proto))
+ return -1;
+ } else {
+ if (strcmp(*argv, "to") == 0) {
+ NEXT_ARG();
+ }
+ if (matches(*argv, "help") == 0) {
+ NEXT_ARG();
+ }
+ if (dst_ok)
+ duparg2("to", *argv);
+ get_addr(&dst, *argv, preferred_family);
+ dst_ok = 1;
+ }
+ argc--; argv++;
+ }
+ if (!dev_ok || !dst_ok || dst.family == AF_UNSPEC) {
+ fprintf(stderr, "Device and destination are required arguments.\n");
+ exit(-1);
+ }
+ req.ndm.ndm_family = dst.family;
+ if (addattr_l(&req.n, sizeof(req), NDA_DST, &dst.data, dst.bytelen) < 0)
+ return -1;
+ if (ext_flags &&
+ addattr_l(&req.n, sizeof(req), NDA_FLAGS_EXT, &ext_flags,
+ sizeof(ext_flags)) < 0)
+ return -1;
+ if (lla && strcmp(lla, "null")) {
+ char llabuf[20];
+ int l;
+
+ l = ll_addr_a2n(llabuf, sizeof(llabuf), lla);
+ if (l < 0)
+ return -1;
+
+ if (addattr_l(&req.n, sizeof(req), NDA_LLADDR, llabuf, l) < 0)
+ return -1;
+ }
+
+ ll_init_map(&rth);
+
+ if (dev) {
+ req.ndm.ndm_ifindex = ll_name_to_index(dev);
+ if (!req.ndm.ndm_ifindex)
+ return nodev(dev);
+ }
+
+ if (rtnl_talk(&rth, &req.n, NULL) < 0)
+ exit(2);
+
+ return 0;
+}
+
+static void print_cacheinfo(const struct nda_cacheinfo *ci)
+{
+ static int hz;
+
+ if (!hz)
+ hz = get_user_hz();
+
+ if (ci->ndm_refcnt)
+ print_uint(PRINT_ANY, "refcnt",
+ " ref %u", ci->ndm_refcnt);
+
+ print_uint(PRINT_ANY, "used", " used %u", ci->ndm_used / hz);
+ print_uint(PRINT_ANY, "confirmed", "/%u", ci->ndm_confirmed / hz);
+ print_uint(PRINT_ANY, "updated", "/%u", ci->ndm_updated / hz);
+}
+
+static void print_neigh_state(unsigned int nud)
+{
+
+ open_json_array(PRINT_JSON,
+ is_json_context() ? "state" : "");
+
+#define PRINT_FLAG(f) \
+ if (nud & NUD_##f) { \
+ nud &= ~NUD_##f; \
+ print_string(PRINT_ANY, NULL, "%s ", #f); \
+ }
+
+ PRINT_FLAG(INCOMPLETE);
+ PRINT_FLAG(REACHABLE);
+ PRINT_FLAG(STALE);
+ PRINT_FLAG(DELAY);
+ PRINT_FLAG(PROBE);
+ PRINT_FLAG(FAILED);
+ PRINT_FLAG(NOARP);
+ PRINT_FLAG(PERMANENT);
+#undef PRINT_FLAG
+
+ close_json_array(PRINT_JSON, NULL);
+}
+
+static int print_neigh_brief(FILE *fp, struct ndmsg *r, struct rtattr *tb[])
+{
+ if (tb[NDA_DST]) {
+ const char *dst;
+ int family = r->ndm_family;
+
+ if (family == AF_BRIDGE) {
+ if (RTA_PAYLOAD(tb[NDA_DST]) == sizeof(struct in6_addr))
+ family = AF_INET6;
+ else
+ family = AF_INET;
+ }
+
+ dst = format_host_rta(family, tb[NDA_DST]);
+ print_color_string(PRINT_ANY, ifa_family_color(family),
+ "dst", "%-39s ", dst);
+ }
+
+ if (!filter.index && r->ndm_ifindex) {
+ print_color_string(PRINT_ANY, COLOR_IFNAME,
+ "dev", "%-16s ",
+ ll_index_to_name(r->ndm_ifindex));
+ }
+
+ if (tb[NDA_LLADDR]) {
+ const char *lladdr;
+
+ SPRINT_BUF(b1);
+
+ lladdr = ll_addr_n2a(RTA_DATA(tb[NDA_LLADDR]),
+ RTA_PAYLOAD(tb[NDA_LLADDR]),
+ ll_index_to_type(r->ndm_ifindex),
+ b1, sizeof(b1));
+
+ print_color_string(PRINT_ANY, COLOR_MAC,
+ "lladdr", "%s", lladdr);
+ }
+
+ print_string(PRINT_FP, NULL, "%s", "\n");
+ close_json_object();
+ fflush(fp);
+
+ return 0;
+}
+
+int print_neigh(struct nlmsghdr *n, void *arg)
+{
+ FILE *fp = (FILE *)arg;
+ struct ndmsg *r = NLMSG_DATA(n);
+ int len = n->nlmsg_len;
+ struct rtattr *tb[NDA_MAX+1];
+ static int logit = 1;
+ __u32 ext_flags = 0;
+ __u8 protocol = 0;
+
+ if (n->nlmsg_type != RTM_NEWNEIGH && n->nlmsg_type != RTM_DELNEIGH &&
+ n->nlmsg_type != RTM_GETNEIGH) {
+ 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 (filter.flushb && n->nlmsg_type != RTM_NEWNEIGH)
+ return 0;
+
+ if (filter.family && filter.family != r->ndm_family)
+ return 0;
+ if (filter.index && filter.index != r->ndm_ifindex)
+ return 0;
+ if (!(filter.state&r->ndm_state) &&
+ !(r->ndm_flags & NTF_PROXY) &&
+ !(r->ndm_flags & NTF_EXT_LEARNED) &&
+ (r->ndm_state || !(filter.state&0x100)))
+ return 0;
+
+ if (filter.master && !(n->nlmsg_flags & NLM_F_DUMP_FILTERED)) {
+ if (logit) {
+ logit = 0;
+ fprintf(fp,
+ "\nWARNING: Kernel does not support filtering by master device\n\n");
+ }
+ }
+
+ parse_rtattr(tb, NDA_MAX, NDA_RTA(r), n->nlmsg_len - NLMSG_LENGTH(sizeof(*r)));
+
+ if (inet_addr_match_rta(&filter.pfx, tb[NDA_DST]))
+ return 0;
+
+ if (tb[NDA_PROTOCOL])
+ protocol = rta_getattr_u8(tb[NDA_PROTOCOL]);
+ if (tb[NDA_FLAGS_EXT])
+ ext_flags = rta_getattr_u32(tb[NDA_FLAGS_EXT]);
+
+ if (filter.protocol && filter.protocol != protocol)
+ return 0;
+
+ if (filter.unused_only && tb[NDA_CACHEINFO]) {
+ struct nda_cacheinfo *ci = RTA_DATA(tb[NDA_CACHEINFO]);
+
+ if (ci->ndm_refcnt)
+ return 0;
+ }
+
+ if (filter.flushb) {
+ struct nlmsghdr *fn;
+
+ if (NLMSG_ALIGN(filter.flushp) + n->nlmsg_len > filter.flushe) {
+ if (flush_update())
+ return -1;
+ }
+ fn = (struct nlmsghdr *)(filter.flushb + NLMSG_ALIGN(filter.flushp));
+ memcpy(fn, n, n->nlmsg_len);
+ fn->nlmsg_type = RTM_DELNEIGH;
+ fn->nlmsg_flags = NLM_F_REQUEST;
+ fn->nlmsg_seq = ++rth.seq;
+ filter.flushp = (((char *)fn) + n->nlmsg_len) - filter.flushb;
+ filter.flushed++;
+ if (show_stats < 2)
+ return 0;
+ }
+
+ open_json_object(NULL);
+ if (n->nlmsg_type == RTM_DELNEIGH)
+ print_bool(PRINT_ANY, "deleted", "Deleted ", true);
+ else if (n->nlmsg_type == RTM_GETNEIGH)
+ print_null(PRINT_ANY, "miss", "%s ", "miss");
+
+ if (brief)
+ return print_neigh_brief(fp, r, tb);
+
+ if (tb[NDA_DST]) {
+ const char *dst;
+ int family = r->ndm_family;
+
+ if (family == AF_BRIDGE) {
+ if (RTA_PAYLOAD(tb[NDA_DST]) == sizeof(struct in6_addr))
+ family = AF_INET6;
+ else
+ family = AF_INET;
+ }
+
+ dst = format_host_rta(family, tb[NDA_DST]);
+ print_color_string(PRINT_ANY,
+ ifa_family_color(family),
+ "dst", "%s ", dst);
+ }
+
+ if (!filter.index && r->ndm_ifindex) {
+ if (!is_json_context())
+ fprintf(fp, "dev ");
+
+ print_color_string(PRINT_ANY, COLOR_IFNAME,
+ "dev", "%s ",
+ ll_index_to_name(r->ndm_ifindex));
+ }
+
+ if (tb[NDA_LLADDR]) {
+ const char *lladdr;
+ SPRINT_BUF(b1);
+
+ lladdr = ll_addr_n2a(RTA_DATA(tb[NDA_LLADDR]),
+ RTA_PAYLOAD(tb[NDA_LLADDR]),
+ ll_index_to_type(r->ndm_ifindex),
+ b1, sizeof(b1));
+
+ if (!is_json_context())
+ fprintf(fp, "lladdr ");
+
+ print_color_string(PRINT_ANY, COLOR_MAC,
+ "lladdr", "%s ", lladdr);
+ }
+
+ if (r->ndm_flags & NTF_ROUTER)
+ print_null(PRINT_ANY, "router", "%s ", "router");
+ if (r->ndm_flags & NTF_PROXY)
+ print_null(PRINT_ANY, "proxy", "%s ", "proxy");
+ if (ext_flags & NTF_EXT_MANAGED)
+ print_null(PRINT_ANY, "managed", "%s ", "managed");
+ if (r->ndm_flags & NTF_EXT_LEARNED)
+ print_null(PRINT_ANY, "extern_learn", "%s ", "extern_learn");
+ if (r->ndm_flags & NTF_OFFLOADED)
+ print_null(PRINT_ANY, "offload", "%s ", "offload");
+
+ if (show_stats) {
+ if (tb[NDA_CACHEINFO])
+ print_cacheinfo(RTA_DATA(tb[NDA_CACHEINFO]));
+
+ if (tb[NDA_PROBES])
+ print_uint(PRINT_ANY, "probes", "probes %u ",
+ rta_getattr_u32(tb[NDA_PROBES]));
+ }
+
+ if (r->ndm_state)
+ print_neigh_state(r->ndm_state);
+
+ if (protocol) {
+ SPRINT_BUF(b1);
+
+ print_string(PRINT_ANY, "protocol", "proto %s ",
+ rtnl_rtprot_n2a(protocol, b1, sizeof(b1)));
+ }
+
+ print_string(PRINT_FP, NULL, "\n", "");
+ close_json_object();
+ fflush(fp);
+
+ return 0;
+}
+
+void ipneigh_reset_filter(int ifindex)
+{
+ memset(&filter, 0, sizeof(filter));
+ filter.state = ~0;
+ filter.index = ifindex;
+}
+
+static int ipneigh_dump_filter(struct nlmsghdr *nlh, int reqlen)
+{
+ struct ndmsg *ndm = NLMSG_DATA(nlh);
+ int err;
+
+ ndm->ndm_flags = filter.ndm_flags;
+
+ if (filter.index) {
+ err = addattr32(nlh, reqlen, NDA_IFINDEX, filter.index);
+ if (err)
+ return err;
+ }
+ if (filter.master) {
+ err = addattr32(nlh, reqlen, NDA_MASTER, filter.master);
+ if (err)
+ return err;
+ }
+
+ return 0;
+}
+
+static int do_show_or_flush(int argc, char **argv, int flush)
+{
+ char *filter_dev = NULL;
+ int state_given = 0;
+
+ ipneigh_reset_filter(0);
+
+ if (!filter.family)
+ filter.family = preferred_family;
+
+ if (flush) {
+ if (argc <= 0) {
+ fprintf(stderr, "Flush requires arguments.\n");
+ return -1;
+ }
+ filter.state = ~(NUD_PERMANENT|NUD_NOARP);
+ } else
+ filter.state = 0xFF & ~NUD_NOARP;
+
+ while (argc > 0) {
+ if (strcmp(*argv, "dev") == 0) {
+ NEXT_ARG();
+ if (filter_dev)
+ duparg("dev", *argv);
+ filter_dev = *argv;
+ } else if (strcmp(*argv, "master") == 0) {
+ int ifindex;
+
+ NEXT_ARG();
+ ifindex = ll_name_to_index(*argv);
+ if (!ifindex)
+ invarg("Device does not exist\n", *argv);
+ filter.master = ifindex;
+ } else if (strcmp(*argv, "vrf") == 0) {
+ int ifindex;
+
+ NEXT_ARG();
+ ifindex = ll_name_to_index(*argv);
+ if (!ifindex)
+ invarg("Not a valid VRF name\n", *argv);
+ if (!name_is_vrf(*argv))
+ invarg("Not a valid VRF name\n", *argv);
+ filter.master = ifindex;
+ } else if (strcmp(*argv, "nomaster") == 0) {
+ filter.master = -1;
+ } else if (strcmp(*argv, "unused") == 0) {
+ filter.unused_only = 1;
+ } else if (strcmp(*argv, "nud") == 0) {
+ unsigned int state;
+
+ NEXT_ARG();
+ if (!state_given) {
+ state_given = 1;
+ filter.state = 0;
+ }
+ if (nud_state_a2n(&state, *argv)) {
+ if (strcmp(*argv, "all") != 0)
+ invarg("nud state is bad", *argv);
+ state = ~0;
+ if (flush)
+ state &= ~NUD_NOARP;
+ }
+ if (state == 0)
+ state = 0x100;
+ filter.state |= state;
+ } else if (strcmp(*argv, "proxy") == 0) {
+ filter.ndm_flags = NTF_PROXY;
+ } else if (matches(*argv, "protocol") == 0) {
+ __u32 prot;
+
+ NEXT_ARG();
+ if (rtnl_rtprot_a2n(&prot, *argv)) {
+ if (strcmp(*argv, "all"))
+ invarg("invalid \"protocol\"\n", *argv);
+ prot = 0;
+ }
+ filter.protocol = prot;
+ } else {
+ if (strcmp(*argv, "to") == 0) {
+ NEXT_ARG();
+ }
+ if (matches(*argv, "help") == 0)
+ usage();
+ if (get_prefix(&filter.pfx, *argv, filter.family))
+ invarg("to value is invalid\n", *argv);
+ if (filter.family == AF_UNSPEC)
+ filter.family = filter.pfx.family;
+ }
+ argc--; argv++;
+ }
+
+ ll_init_map(&rth);
+
+ if (filter_dev) {
+ filter.index = ll_name_to_index(filter_dev);
+ if (!filter.index)
+ return nodev(filter_dev);
+ }
+
+ if (flush) {
+ int round = 0;
+ char flushb[4096-512];
+
+ filter.flushb = flushb;
+ filter.flushp = 0;
+ filter.flushe = sizeof(flushb);
+
+ while (round < MAX_ROUNDS) {
+ if (rtnl_neighdump_req(&rth, filter.family,
+ ipneigh_dump_filter) < 0) {
+ perror("Cannot send dump request");
+ exit(1);
+ }
+ filter.flushed = 0;
+ if (rtnl_dump_filter(&rth, print_neigh, stdout) < 0) {
+ fprintf(stderr, "Flush terminated\n");
+ exit(1);
+ }
+ if (filter.flushed == 0) {
+ if (show_stats) {
+ if (round == 0)
+ printf("Nothing to flush.\n");
+ else
+ printf("*** Flush is complete after %d round%s ***\n", round, round > 1?"s":"");
+ }
+ fflush(stdout);
+ return 0;
+ }
+ round++;
+ if (flush_update() < 0)
+ exit(1);
+ if (show_stats) {
+ printf("\n*** Round %d, deleting %d entries ***\n", round, filter.flushed);
+ fflush(stdout);
+ }
+ filter.state &= ~NUD_FAILED;
+ }
+ printf("*** Flush not complete bailing out after %d rounds\n",
+ MAX_ROUNDS);
+ return 1;
+ }
+
+ if (rtnl_neighdump_req(&rth, filter.family, ipneigh_dump_filter) < 0) {
+ perror("Cannot send dump request");
+ exit(1);
+ }
+
+ new_json_obj(json);
+ if (rtnl_dump_filter(&rth, print_neigh, stdout) < 0) {
+ fprintf(stderr, "Dump terminated\n");
+ exit(1);
+ }
+ delete_json_obj();
+
+ return 0;
+}
+
+static int ipneigh_get(int argc, char **argv)
+{
+ struct {
+ struct nlmsghdr n;
+ struct ndmsg ndm;
+ char buf[1024];
+ } req = {
+ .n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)),
+ .n.nlmsg_flags = NLM_F_REQUEST,
+ .n.nlmsg_type = RTM_GETNEIGH,
+ .ndm.ndm_family = preferred_family,
+ };
+ struct nlmsghdr *answer;
+ char *d = NULL;
+ int dst_ok = 0;
+ int dev_ok = 0;
+ inet_prefix dst;
+
+ while (argc > 0) {
+ if (strcmp(*argv, "dev") == 0) {
+ NEXT_ARG();
+ d = *argv;
+ dev_ok = 1;
+ } else if (matches(*argv, "proxy") == 0) {
+ NEXT_ARG();
+ if (matches(*argv, "help") == 0)
+ usage();
+ if (dst_ok)
+ duparg("address", *argv);
+ get_addr(&dst, *argv, preferred_family);
+ dst_ok = 1;
+ dev_ok = 1;
+ req.ndm.ndm_flags |= NTF_PROXY;
+ } else {
+ if (strcmp(*argv, "to") == 0)
+ NEXT_ARG();
+
+ if (matches(*argv, "help") == 0)
+ usage();
+ if (dst_ok)
+ duparg2("to", *argv);
+ get_addr(&dst, *argv, preferred_family);
+ dst_ok = 1;
+ }
+ argc--; argv++;
+ }
+
+ if (!dev_ok || !dst_ok || dst.family == AF_UNSPEC) {
+ fprintf(stderr, "Device and address are required arguments.\n");
+ return -1;
+ }
+
+ req.ndm.ndm_family = dst.family;
+ if (addattr_l(&req.n, sizeof(req), NDA_DST, &dst.data, dst.bytelen) < 0)
+ return -1;
+
+ if (d) {
+ req.ndm.ndm_ifindex = ll_name_to_index(d);
+ if (!req.ndm.ndm_ifindex) {
+ fprintf(stderr, "Cannot find device \"%s\"\n", d);
+ return -1;
+ }
+ }
+
+ if (rtnl_talk(&rth, &req.n, &answer) < 0)
+ return -2;
+
+ ipneigh_reset_filter(0);
+ if (print_neigh(answer, stdout) < 0) {
+ fprintf(stderr, "An error :-)\n");
+ free(answer);
+ return -1;
+ }
+ free(answer);
+
+ return 0;
+}
+
+int do_ipneigh(int argc, char **argv)
+{
+ if (argc > 0) {
+ if (matches(*argv, "add") == 0)
+ return ipneigh_modify(RTM_NEWNEIGH, NLM_F_CREATE|NLM_F_EXCL, argc-1, argv+1);
+ if (matches(*argv, "change") == 0 ||
+ strcmp(*argv, "chg") == 0)
+ return ipneigh_modify(RTM_NEWNEIGH, NLM_F_REPLACE, argc-1, argv+1);
+ if (matches(*argv, "replace") == 0)
+ return ipneigh_modify(RTM_NEWNEIGH, NLM_F_CREATE|NLM_F_REPLACE, argc-1, argv+1);
+ if (matches(*argv, "delete") == 0)
+ return ipneigh_modify(RTM_DELNEIGH, 0, argc-1, argv+1);
+ if (matches(*argv, "get") == 0)
+ return ipneigh_get(argc-1, argv+1);
+ if (matches(*argv, "show") == 0 ||
+ matches(*argv, "lst") == 0 ||
+ matches(*argv, "list") == 0)
+ return do_show_or_flush(argc-1, argv+1, 0);
+ if (matches(*argv, "flush") == 0)
+ return do_show_or_flush(argc-1, argv+1, 1);
+ if (matches(*argv, "help") == 0)
+ usage();
+ } else
+ return do_show_or_flush(0, NULL, 0);
+
+ fprintf(stderr, "Command \"%s\" is unknown, try \"ip neigh help\".\n", *argv);
+ exit(-1);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-30 19:10:17 +0000