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diff --git a/usr.bin/netstat/Makefile b/usr.bin/netstat/Makefile
--- a/usr.bin/netstat/Makefile
+++ b/usr.bin/netstat/Makefile
@@ -6,6 +6,7 @@
PROG= netstat
SRCS= if.c inet.c main.c mbuf.c mroute.c netisr.c nl_symbols.c route.c \
unix.c mroute6.c ipsec.c bpf.c pfkey.c sctp.c common.c nhops.c nhgrp.c \
+ route_netlink.c \
nl_defs.h
nl_symbols.c: nlist_symbols
diff --git a/usr.bin/netstat/common.h b/usr.bin/netstat/common.h
--- a/usr.bin/netstat/common.h
+++ b/usr.bin/netstat/common.h
@@ -45,11 +45,28 @@
const char *fmt_flags(const struct bits *p, int f);
void print_flags_generic(int flags, const struct bits *pbits,
const char *format, const char *tag_name);
-int print_sockaddr(const char *name, struct sockaddr *sa,
- struct sockaddr *mask, int flags, int width);
+int p_sockaddr(const char *name, struct sockaddr *sa, struct sockaddr *mask,
+ int flags, int width);
+
+struct _wid {
+ int dst;
+ int gw;
+ int flags;
+ int pksent;
+ int mtu;
+ int iface;
+ int expire;
+};
+void set_wid(int fam);
+void pr_rthdr(int af1 __unused);
+extern struct _wid wid;
+void p_flags(int f, const char *format);
+
+bool p_rtable_netlink(int fibnum, int af);
struct ifmap_entry {
char ifname[IFNAMSIZ];
+ uint32_t mtu;
};
struct ifmap_entry *prepare_ifmap(size_t *ifmap_size);
diff --git a/usr.bin/netstat/route.c b/usr.bin/netstat/route.c
--- a/usr.bin/netstat/route.c
+++ b/usr.bin/netstat/route.c
@@ -106,7 +106,6 @@
#endif
static void p_rtable_sysctl(int, int);
static void p_rtentry_sysctl(const char *name, struct rt_msghdr *);
-static void p_flags(int, const char *);
static void domask(char *, size_t, u_long);
@@ -143,7 +142,8 @@
if (fibnum)
xo_emit(" ({L:fib}: {:fib/%d})", fibnum);
xo_emit("\n");
- p_rtable_sysctl(fibnum, af);
+ if (!p_rtable_netlink(fibnum, af))
+ p_rtable_sysctl(fibnum, af);
xo_close_container("route-information");
}
@@ -197,42 +197,48 @@
#define WID_IF_DEFAULT(af) ((af) == AF_INET6 ? 8 : (Wflag ? 10 : 8))
#endif /*INET6*/
-static int wid_dst;
-static int wid_gw;
-static int wid_flags;
-static int wid_pksent;
-static int wid_mtu;
-static int wid_if;
-static int wid_expire;
+struct _wid wid;
/*
* Print header for routing table columns.
*/
-static void
+void
pr_rthdr(int af1 __unused)
{
if (Wflag) {
xo_emit("{T:/%-*.*s} {T:/%-*.*s} {T:/%-*.*s} {T:/%*.*s} "
"{T:/%*.*s} {T:/%*.*s} {T:/%*s}\n",
- wid_dst, wid_dst, "Destination",
- wid_gw, wid_gw, "Gateway",
- wid_flags, wid_flags, "Flags",
- wid_mtu, wid_mtu, "Nhop#",
- wid_mtu, wid_mtu, "Mtu",
- wid_if, wid_if, "Netif",
- wid_expire, "Expire");
+ wid.dst, wid.dst, "Destination",
+ wid.gw, wid.gw, "Gateway",
+ wid.flags, wid.flags, "Flags",
+ wid.mtu, wid.mtu, "Nhop#",
+ wid.mtu, wid.mtu, "Mtu",
+ wid.iface, wid.iface, "Netif",
+ wid.expire, "Expire");
} else {
xo_emit("{T:/%-*.*s} {T:/%-*.*s} {T:/%-*.*s} {T:/%*.*s} "
"{T:/%*s}\n",
- wid_dst, wid_dst, "Destination",
- wid_gw, wid_gw, "Gateway",
- wid_flags, wid_flags, "Flags",
- wid_if, wid_if, "Netif",
- wid_expire, "Expire");
+ wid.dst, wid.dst, "Destination",
+ wid.gw, wid.gw, "Gateway",
+ wid.flags, wid.flags, "Flags",
+ wid.iface, wid.iface, "Netif",
+ wid.expire, "Expire");
}
}
+void
+set_wid(int fam)
+{
+ wid.dst = WID_DST_DEFAULT(fam);
+ wid.gw = WID_GW_DEFAULT(fam);
+ wid.flags = 6;
+ wid.pksent = 8;
+ wid.mtu = 6;
+ wid.iface = WID_IF_DEFAULT(fam);
+ wid.expire = 6;
+}
+
static void
p_rtable_sysctl(int fibnum, int af)
{
@@ -278,15 +284,8 @@
xo_close_instance("rt-family");
}
need_table_close = true;
-
fam = sa->sa_family;
- wid_dst = WID_DST_DEFAULT(fam);
- wid_gw = WID_GW_DEFAULT(fam);
- wid_flags = 6;
- wid_pksent = 8;
- wid_mtu = 6;
- wid_if = WID_IF_DEFAULT(fam);
- wid_expire = 6;
+ set_wid(fam);
xo_open_instance("rt-family");
pr_family(fam);
xo_open_list("rt-entry");
@@ -323,22 +322,22 @@
protrusion = p_sockaddr("destination", addr[RTAX_DST],
addr[RTAX_NETMASK],
- rtm->rtm_flags, wid_dst);
+ rtm->rtm_flags, wid.dst);
protrusion = p_sockaddr("gateway", addr[RTAX_GATEWAY], NULL, RTF_HOST,
- wid_gw - protrusion);
+ wid.gw - protrusion);
snprintf(buffer, sizeof(buffer), "{[:-%d}{:flags/%%s}{]:} ",
- wid_flags - protrusion);
+ wid.flags - protrusion);
p_flags(rtm->rtm_flags, buffer);
/* Output path weight as non-visual property */
xo_emit("{e:weight/%u}", rtm->rtm_rmx.rmx_weight);
if (Wflag) {
/* XXX: use=0? */
- xo_emit("{t:nhop/%*lu} ", wid_mtu, rtm->rtm_rmx.rmx_nhidx);
+ xo_emit("{t:nhop/%*lu} ", wid.mtu, rtm->rtm_rmx.rmx_nhidx);
if (rtm->rtm_rmx.rmx_mtu != 0)
- xo_emit("{t:mtu/%*lu} ", wid_mtu, rtm->rtm_rmx.rmx_mtu);
+ xo_emit("{t:mtu/%*lu} ", wid.mtu, rtm->rtm_rmx.rmx_mtu);
else
- xo_emit("{P:/%*s} ", wid_mtu, "");
+ xo_emit("{P:/%*s} ", wid.mtu, "");
}
memset(prettyname, 0, sizeof(prettyname));
@@ -350,15 +349,15 @@
}
if (Wflag)
- xo_emit("{t:interface-name/%*s}", wid_if, prettyname);
+ xo_emit("{t:interface-name/%*s}", wid.iface, prettyname);
else
- xo_emit("{t:interface-name/%*.*s}", wid_if, wid_if,
+ xo_emit("{t:interface-name/%*.*s}", wid.iface, wid.iface,
prettyname);
if (rtm->rtm_rmx.rmx_expire) {
time_t expire_time;
if ((expire_time = rtm->rtm_rmx.rmx_expire - uptime.tv_sec) > 0)
- xo_emit(" {:expire-time/%*d}", wid_expire,
+ xo_emit(" {:expire-time/%*d}", wid.expire,
(int)expire_time);
}
@@ -472,7 +471,7 @@
return (cp);
}
-static void
+void
p_flags(int f, const char *format)
{
diff --git a/usr.bin/netstat/route_netlink.c b/usr.bin/netstat/route_netlink.c
new file mode 100644
--- /dev/null
+++ b/usr.bin/netstat/route_netlink.c
@@ -0,0 +1,491 @@
+/*-
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * Copyright (c) 1983, 1988, 1993
+ * The Regents of the University of California. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/protosw.h>
+#include <sys/socket.h>
+#include <sys/socketvar.h>
+#include <sys/sysctl.h>
+#include <sys/time.h>
+
+#include <net/ethernet.h>
+#include <net/if.h>
+#include <net/if_dl.h>
+#include <net/if_types.h>
+#include <netlink/netlink.h>
+#include <netlink/netlink_route.h>
+#include <netlink/netlink_snl.h>
+#include <netlink/netlink_snl_route.h>
+
+#include <netinet/in.h>
+#include <netgraph/ng_socket.h>
+
+#include <arpa/inet.h>
+#include <ifaddrs.h>
+#include <libutil.h>
+#include <netdb.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdbool.h>
+#include <string.h>
+#include <sysexits.h>
+#include <unistd.h>
+#include <err.h>
+#include <libxo/xo.h>
+#include "netstat.h"
+#include "common.h"
+#include "nl_defs.h"
+
+
+static void p_rtentry_netlink(struct snl_state *ss, const char *name, struct nlmsghdr *hdr);
+
+static struct ifmap_entry *ifmap;
+static size_t ifmap_size;
+
+struct nl_parsed_link {
+ uint32_t ifi_index;
+ uint32_t ifla_mtu;
+ char *ifla_ifname;
+};
+
+#define _IN(_field) offsetof(struct ifinfomsg, _field)
+#define _OUT(_field) offsetof(struct nl_parsed_link, _field)
+static struct snl_attr_parser ap_link[] = {
+ { .type = IFLA_IFNAME, .off = _OUT(ifla_ifname), .cb = snl_attr_get_string },
+ { .type = IFLA_MTU, .off = _OUT(ifla_mtu), .cb = snl_attr_get_uint32 },
+};
+static struct snl_field_parser fp_link[] = {
+ {.off_in = _IN(ifi_index), .off_out = _OUT(ifi_index), .cb = snl_field_get_uint32 },
+};
+#undef _IN
+#undef _OUT
+SNL_DECLARE_PARSER(link_parser, struct ifinfomsg, fp_link, ap_link);
+
+/* Generate ifmap using netlink */
+static struct ifmap_entry *
+prepare_ifmap_netlink(struct snl_state *ss, size_t *pifmap_size)
+{
+ struct {
+ struct nlmsghdr hdr;
+ struct ifinfomsg ifmsg;
+ } msg = {
+ .hdr.nlmsg_type = RTM_GETLINK,
+ .hdr.nlmsg_flags = NLM_F_DUMP | NLM_F_REQUEST,
+ .hdr.nlmsg_seq = snl_get_seq(ss),
+ };
+ msg.hdr.nlmsg_len = sizeof(msg);
+
+ if (!snl_send(ss, &msg, sizeof(msg))) {
+ snl_free(ss);
+ return (NULL);
+ }
+
+ struct ifmap_entry *ifmap = NULL;
+ uint32_t ifmap_size = 0;
+ struct nlmsghdr *hdr;
+ while ((hdr = snl_read_message(ss)) != NULL && hdr->nlmsg_type != NLMSG_DONE) {
+ if (hdr->nlmsg_seq != msg.hdr.nlmsg_seq)
+ continue;
+/*
+ if (hdr->nlmsg_type == NLMSG_ERROR)
+ break;
+*/
+ struct nl_parsed_link link = {};
+ if (!snl_parse_nlmsg(ss, hdr, &link_parser, &link))
+ continue;
+ if (link.ifi_index >= ifmap_size) {
+ size_t size = roundup2(link.ifi_index + 1, 32) * sizeof(struct ifmap_entry);
+ if ((ifmap = realloc(ifmap, size)) == NULL)
+ errx(2, "realloc(%lu) failed", size);
+ memset(&ifmap[ifmap_size], 0,
+ size - ifmap_size *
+ sizeof(struct ifmap_entry));
+ ifmap_size = roundup2(link.ifi_index + 1, 32);
+ }
+ if (*ifmap[link.ifi_index].ifname != '\0')
+ continue;
+ strlcpy(ifmap[link.ifi_index].ifname, link.ifla_ifname, IFNAMSIZ);
+ ifmap[link.ifi_index].mtu = link.ifla_mtu;
+ }
+ *pifmap_size = ifmap_size;
+ return (ifmap);
+}
+
+struct rta_mpath_nh {
+ struct sockaddr *gw;
+ uint32_t ifindex;
+ uint8_t rtnh_flags;
+ uint8_t rtnh_weight;
+ uint32_t rtax_mtu;
+ uint32_t rta_knh_id;
+ uint32_t rta_rtflags;
+};
+
+#define _IN(_field) offsetof(struct rtnexthop, _field)
+#define _OUT(_field) offsetof(struct rta_mpath_nh, _field)
+static const struct snl_attr_parser nla_p_mp_rtmetrics[] = {
+ { .type = NL_RTAX_MTU, .off = _OUT(rtax_mtu), .cb = snl_attr_get_uint32 },
+};
+SNL_DECLARE_ATTR_PARSER(metrics_mp_parser, nla_p_mp_rtmetrics);
+
+static const struct snl_attr_parser psnh[] = {
+ { .type = NL_RTA_GATEWAY, .off = _OUT(gw), .cb = snl_attr_get_ip },
+ { .type = NL_RTA_METRICS, .arg = &metrics_mp_parser, .cb = snl_attr_get_nested },
+ { .type = NL_RTA_KNH_ID, .off = _OUT(rta_knh_id), .cb = snl_attr_get_uint32 },
+ { .type = NL_RTA_RTFLAGS, .off = _OUT(gw), .cb = snl_attr_get_uint32 },
+ { .type = NL_RTA_VIA, .off = _OUT(gw), .cb = snl_attr_get_ipvia },
+};
+
+static const struct snl_field_parser fpnh[] = {
+ { .off_in = _IN(rtnh_flags), .off_out = _OUT(rtnh_flags), .cb = snl_field_get_uint8 },
+ { .off_in = _IN(rtnh_hops), .off_out = _OUT(rtnh_weight), .cb = snl_field_get_uint8 },
+ { .off_in = _IN(rtnh_ifindex), .off_out = _OUT(ifindex), .cb = snl_field_get_uint32 },
+};
+#undef _IN
+#undef _OUT
+
+SNL_DECLARE_PARSER(mpath_parser, struct rtnexthop, fpnh, psnh);
+
+struct rta_mpath {
+ int num_nhops;
+ struct rta_mpath_nh nhops[0];
+};
+
+static bool
+nlattr_get_multipath(struct snl_state *ss, struct nlattr *nla, const void *arg, void *target)
+{
+ int data_len = nla->nla_len - sizeof(struct nlattr);
+ struct rtnexthop *rtnh;
+
+ int max_nhops = data_len / sizeof(struct rtnexthop);
+ size_t sz = (max_nhops + 2) * sizeof(struct rta_mpath_nh);
+
+ struct rta_mpath *mp = snl_allocz(ss, sz);
+ mp->num_nhops = 0;
+
+ for (rtnh = (struct rtnexthop *)(nla + 1); data_len > 0; ) {
+ struct rta_mpath_nh *mpnh = &mp->nhops[mp->num_nhops++];
+
+ if (!snl_parse_header(ss, rtnh, rtnh->rtnh_len, &mpath_parser, mpnh))
+ return (false);
+
+ int len = NL_ITEM_ALIGN(rtnh->rtnh_len);
+ data_len -= len;
+ rtnh = (struct rtnexthop *)((char *)rtnh + len);
+ }
+ if (data_len != 0 || mp->num_nhops == 0) {
+ return (false);
+ }
+
+ *((struct rta_mpath **)target) = mp;
+ return (true);
+}
+
+
+struct nl_parsed_route {
+ struct sockaddr *rta_dst;
+ struct sockaddr *rta_gw;
+ struct nlattr *rta_metrics;
+ struct rta_mpath *rta_multipath;
+ uint32_t rta_expires;
+ uint32_t rta_oif;
+ uint32_t rta_expire;
+ uint32_t rta_table;
+ uint32_t rta_knh_id;
+ uint32_t rta_rtflags;
+ uint32_t rtax_mtu;
+ uint32_t rtax_weight;
+ uint8_t rtm_family;
+ uint8_t rtm_type;
+ uint8_t rtm_protocol;
+ uint8_t rtm_dst_len;
+};
+
+#define _IN(_field) offsetof(struct rtmsg, _field)
+#define _OUT(_field) offsetof(struct nl_parsed_route, _field)
+static const struct snl_attr_parser nla_p_rtmetrics[] = {
+ { .type = NL_RTAX_MTU, .off = _OUT(rtax_mtu), .cb = snl_attr_get_uint32 },
+};
+SNL_DECLARE_ATTR_PARSER(metrics_parser, nla_p_rtmetrics);
+
+static const struct snl_attr_parser ps[] = {
+ { .type = NL_RTA_DST, .off = _OUT(rta_dst), .cb = snl_attr_get_ip },
+ { .type = NL_RTA_OIF, .off = _OUT(rta_oif), .cb = snl_attr_get_uint32 },
+ { .type = NL_RTA_GATEWAY, .off = _OUT(rta_gw), .cb = snl_attr_get_ip },
+ { .type = NL_RTA_METRICS, .arg = &metrics_parser, .cb = snl_attr_get_nested },
+ { .type = NL_RTA_MULTIPATH, .off = _OUT(rta_multipath), .cb = nlattr_get_multipath },
+ { .type = NL_RTA_KNH_ID, .off = _OUT(rta_knh_id), .cb = snl_attr_get_uint32 },
+ { .type = NL_RTA_RTFLAGS, .off = _OUT(rta_rtflags), .cb = snl_attr_get_uint32 },
+ { .type = NL_RTA_TABLE, .off = _OUT(rta_table), .cb = snl_attr_get_uint32 },
+ { .type = NL_RTA_VIA, .off = _OUT(rta_gw), .cb = snl_attr_get_ipvia },
+ { .type = NL_RTA_EXPIRES, .off = _OUT(rta_expire), .cb = snl_attr_get_uint32 },
+};
+
+static const struct snl_field_parser fprt[] = {
+ {.off_in = _IN(rtm_family), .off_out = _OUT(rtm_family), .cb = snl_field_get_uint8 },
+ {.off_in = _IN(rtm_type), .off_out = _OUT(rtm_type), .cb = snl_field_get_uint8 },
+ {.off_in = _IN(rtm_protocol), .off_out = _OUT(rtm_protocol), .cb = snl_field_get_uint8 },
+ {.off_in = _IN(rtm_dst_len), .off_out = _OUT(rtm_dst_len), .cb = snl_field_get_uint8 },
+};
+#undef _IN
+#undef _OUT
+SNL_DECLARE_PARSER(rtm_parser, struct rtmsg, fprt, ps);
+
+#define RTF_UP 0x1
+#define RTF_GATEWAY 0x2
+#define RTF_HOST 0x4
+#define RTF_REJECT 0x8
+#define RTF_DYNAMIC 0x10
+#define RTF_STATIC 0x800
+#define RTF_BLACKHOLE 0x1000
+#define RTF_PROTO2 0x4000
+#define RTF_PROTO1 0x8000
+#define RTF_PROTO3 0x40000
+#define RTF_FIXEDMTU 0x80000
+#define RTF_PINNED 0x100000
+
+static void
+ip6_writemask(struct in6_addr *addr6, uint8_t mask)
+{
+ uint32_t *cp;
+
+ for (cp = (uint32_t *)addr6; mask >= 32; mask -= 32)
+ *cp++ = 0xFFFFFFFF;
+ if (mask > 0)
+ *cp = htonl(mask ? ~((1 << (32 - mask)) - 1) : 0);
+}
+
+static void
+gen_mask(int family, int plen, struct sockaddr *sa)
+{
+ if (family == AF_INET6) {
+ struct sockaddr_in6 sin6 = {
+ .sin6_family = AF_INET6,
+ .sin6_len = sizeof(struct sockaddr_in6),
+ };
+ ip6_writemask(&sin6.sin6_addr, plen);
+ *((struct sockaddr_in6 *)sa) = sin6;
+ } else if (family == AF_INET) {
+ struct sockaddr_in sin = {
+ .sin_family = AF_INET,
+ .sin_len = sizeof(struct sockaddr_in),
+ .sin_addr.s_addr = htonl(plen ? ~((1 << (32 - plen)) - 1) : 0),
+ };
+ *((struct sockaddr_in *)sa) = sin;
+ }
+}
+
+struct sockaddr_dl_short {
+ u_char sdl_len; /* Total length of sockaddr */
+ u_char sdl_family; /* AF_LINK */
+ u_short sdl_index; /* if != 0, system given index for interface */
+ u_char sdl_type; /* interface type */
+ u_char sdl_nlen; /* interface name length, no trailing 0 reqd. */
+ u_char sdl_alen; /* link level address length */
+ u_char sdl_slen; /* link layer selector length */
+ char sdl_data[8]; /* unused */
+};
+
+static void
+p_path(struct nl_parsed_route *rt)
+{
+ struct sockaddr_in6 mask6;
+ struct sockaddr *pmask = (struct sockaddr *)&mask6;
+ char buffer[128];
+ char prettyname[128];
+ int protrusion;
+
+ gen_mask(rt->rtm_family, rt->rtm_dst_len, pmask);
+ protrusion = p_sockaddr("destination", rt->rta_dst, pmask, rt->rta_rtflags, wid.dst);
+ protrusion = p_sockaddr("gateway", rt->rta_gw, NULL, RTF_HOST,
+ wid.gw - protrusion);
+ snprintf(buffer, sizeof(buffer), "{[:-%d}{:flags/%%s}{]:} ",
+ wid.flags - protrusion);
+ p_flags(rt->rta_rtflags | RTF_UP, buffer);
+ /* Output path weight as non-visual property */
+ xo_emit("{e:weight/%u}", rt->rtax_weight);
+
+ memset(prettyname, 0, sizeof(prettyname));
+ if (rt->rta_oif < ifmap_size) {
+ strlcpy(prettyname, ifmap[rt->rta_oif].ifname,
+ sizeof(prettyname));
+ if (*prettyname == '\0')
+ strlcpy(prettyname, "---", sizeof(prettyname));
+ if (rt->rtax_mtu == 0)
+ rt->rtax_mtu = ifmap[rt->rta_oif].mtu;
+ }
+
+ if (Wflag) {
+ /* XXX: use=0? */
+ xo_emit("{t:nhop/%*lu} ", wid.mtu, rt->rta_knh_id);
+
+ if (rt->rtax_mtu != 0)
+ xo_emit("{t:mtu/%*lu} ", wid.mtu, rt->rtax_mtu);
+ else {
+ /* use interface mtu */
+ xo_emit("{P:/%*s} ", wid.mtu, "");
+ }
+
+ }
+
+ if (Wflag)
+ xo_emit("{t:interface-name/%*s}", wid.iface, prettyname);
+ else
+ xo_emit("{t:interface-name/%*.*s}", wid.iface, wid.iface,
+ prettyname);
+ if (rt->rta_expires > 0) {
+ xo_emit(" {:expire-time/%*u}", wid.expire, rt->rta_expires);
+ }
+}
+
+static void
+p_rtentry_netlink(struct snl_state *ss, const char *name, struct nlmsghdr *hdr)
+{
+
+ struct nl_parsed_route rt = {};
+ if (!snl_parse_nlmsg(ss, hdr, &rtm_parser, &rt))
+ return;
+
+ if (rt.rta_multipath != NULL) {
+ uint32_t orig_rtflags = rt.rta_rtflags;
+ uint32_t orig_mtu = rt.rtax_mtu;
+ for (int i = 0; i < rt.rta_multipath->num_nhops; i++) {
+ struct rta_mpath_nh *nhop = &rt.rta_multipath->nhops[i];
+
+ rt.rta_gw = nhop->gw;
+ rt.rta_oif = nhop->ifindex;
+ rt.rtax_weight = nhop->rtnh_weight;
+ rt.rta_rtflags = nhop->rta_rtflags ? nhop->rta_rtflags : orig_rtflags;
+ rt.rta_knh_id = nhop->rta_knh_id;
+ rt.rtax_mtu = nhop->rtax_mtu ? nhop->rtax_mtu : orig_mtu;
+
+ xo_open_instance(name);
+ p_path(&rt);
+ xo_emit("\n");
+ xo_close_instance(name);
+ }
+ return;
+ }
+
+ struct sockaddr_dl_short sdl_gw = {
+ .sdl_family = AF_LINK,
+ .sdl_len = sizeof(struct sockaddr_dl_short),
+ .sdl_index = rt.rta_oif,
+ };
+ if (rt.rta_gw == NULL)
+ rt.rta_gw = (struct sockaddr *)&sdl_gw;
+
+ xo_open_instance(name);
+ p_path(&rt);
+ xo_emit("\n");
+ xo_close_instance(name);
+}
+
+static const struct snl_hdr_parser *all_parsers[] = {
+ &link_parser, &metrics_mp_parser, &mpath_parser, &metrics_parser, &rtm_parser
+};
+
+bool
+p_rtable_netlink(int fibnum, int af)
+{
+ int fam = AF_UNSPEC;
+ int need_table_close = false;
+ struct nlmsghdr *hdr;
+
+ struct snl_state ss = {};
+
+ SNL_VERIFY_PARSERS(all_parsers);
+
+ if (!snl_init(&ss, NETLINK_ROUTE))
+ return (false);
+
+ ifmap = prepare_ifmap_netlink(&ss, &ifmap_size);
+
+ struct {
+ struct nlmsghdr hdr;
+ struct rtmsg rtmsg;
+ struct nlattr nla_fibnum;
+ uint32_t fibnum;
+ } msg = {
+ .hdr.nlmsg_type = RTM_GETROUTE,
+ .hdr.nlmsg_flags = NLM_F_DUMP | NLM_F_REQUEST,
+ .hdr.nlmsg_seq = snl_get_seq(&ss),
+ .rtmsg.rtm_family = af,
+ .nla_fibnum.nla_len = sizeof(struct nlattr) + sizeof(uint32_t),
+ .nla_fibnum.nla_type = RTA_TABLE,
+ .fibnum = fibnum,
+ };
+ msg.hdr.nlmsg_len = sizeof(msg);
+
+ if (!snl_send(&ss, &msg, sizeof(msg))) {
+ snl_free(&ss);
+ return (false);
+ }
+
+ xo_open_container("route-table");
+ xo_open_list("rt-family");
+ while ((hdr = snl_read_message(&ss)) != NULL && hdr->nlmsg_type != NLMSG_DONE) {
+ if (hdr->nlmsg_seq != msg.hdr.nlmsg_seq)
+ continue;
+ struct rtmsg *rtm = (struct rtmsg *)(hdr + 1);
+ /* Only print family first time. */
+ if (fam != rtm->rtm_family) {
+ if (need_table_close) {
+ xo_close_list("rt-entry");
+ xo_close_instance("rt-family");
+ }
+ need_table_close = true;
+ fam = rtm->rtm_family;
+ set_wid(fam);
+ xo_open_instance("rt-family");
+ pr_family(fam);
+ xo_open_list("rt-entry");
+ pr_rthdr(fam);
+ }
+ p_rtentry_netlink(&ss, "rt-entry", hdr);
+ snl_clear_lb(&ss);
+ }
+ if (need_table_close) {
+ xo_close_list("rt-entry");
+ xo_close_instance("rt-family");
+ }
+ xo_close_list("rt-family");
+ xo_close_container("route-table");
+ snl_free(&ss);
+ return (true);
+}
+
+

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