D39007.id119099.diff
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	diff --git a/sbin/route/Makefile b/sbin/route/Makefile
	--- a/sbin/route/Makefile
	+++ b/sbin/route/Makefile
	@@ -19,6 +19,12 @@
	.endif
	CFLAGS+= -I.

	+.if ${MK_NETLINK_SUPPORT} != "no"
	+SRCS+= route_netlink.c
	+.else
	+CFLAGS+=-DWITHOUT_NETLINK
	+.endif
	+
	HAS_TESTS=
	SUBDIR.${MK_TESTS}+= tests

	diff --git a/sbin/route/route.c b/sbin/route/route.c
	--- a/sbin/route/route.c
	+++ b/sbin/route/route.c
	@@ -90,12 +90,11 @@
	{0, 0}
	};

	+int verbose, debugonly;
	static struct sockaddr_storage so[RTAX_MAX];
	static int pid, rtm_addrs;
	-static int s;
	-static int nflag, af, qflag, tflag;
	-static int verbose, aflen;
	-static int locking, lockrest, debugonly;
	+static int nflag, af, aflen, qflag, tflag;
	+static int locking, lockrest;
	static struct rt_metrics rt_metrics;
	static u_long rtm_inits;
	static uid_t uid;
	@@ -103,18 +102,30 @@
	static int numfibs;
	static char domain[MAXHOSTNAMELEN + 1];
	static bool domain_initialized;
	-static int rtm_seq;
	static char rt_line[NI_MAXHOST];
	static char net_line[MAXHOSTNAMELEN + 1];

	+#ifdef WITHOUT_NETLINK
	+static int s;
	+static int rtm_seq;
	+
	static struct {
	struct rt_msghdr m_rtm;
	char m_space[512];
	} m_rtmsg;

	+static int rtmsg_rtsock(int, int, int);
	+static int flushroutes_fib_rtsock(int);
	+static void monitor_rtsock(void);
	+#else
	+int rtmsg_nl(int, int, int, struct sockaddr_storage , struct rt_metrics );
	+int flushroutes_fib_nl(int, int);
	+void monitor_nl(int);
	+#endif
	+
	static TAILQ_HEAD(fibl_head_t, fibl) fibl_head;

	-static void printb(int, const char *);
	+void printb(int, const char *);
	static void flushroutes(int argc, char *argv[]);
	static int flushroutes_fib(int);
	static int getaddr(int, char *, int);
	@@ -127,7 +138,7 @@
	#endif
	static void interfaces(void);
	static void monitor(int, char*[]);
	-static const char netname(struct sockaddr );
	+const char netname(struct sockaddr );
	static void newroute(int, char **);
	static int newroute_fib(int, char *, int);
	static void pmsg_addrs(char *, int, size_t);
	@@ -135,7 +146,7 @@
	static int prefixlen(const char *);
	static void print_getmsg(struct rt_msghdr *, int, int);
	static void print_rtmsg(struct rt_msghdr *, size_t);
	-static const char routename(struct sockaddr );
	+const char routename(struct sockaddr );
	static int rtmsg(int, int, int);
	static void set_metric(char *, int);
	static int set_sofib(int);
	@@ -216,12 +227,14 @@

	pid = getpid();
	uid = geteuid();
	+#ifdef WITHOUT_NETLINK
	if (tflag)
	s = open(_PATH_DEVNULL, O_WRONLY, 0);
	else
	s = socket(PF_ROUTE, SOCK_RAW, 0);
	if (s < 0)
	err(EX_OSERR, "socket");
	+#endif

	len = sizeof(numfibs);
	if (sysctlbyname("net.fibs", (void *)&numfibs, &len, NULL, 0) == -1)
	@@ -264,10 +277,14 @@
	set_sofib(int fib)
	{

	+#ifdef WITHOUT_NETLINK
	if (fib < 0)
	return (0);
	return (setsockopt(s, SOL_SOCKET, SO_SETFIB, (void *)&fib,
	sizeof(fib)));
	+#else
	+ return (0);
	+#endif
	}

	static int
	@@ -395,7 +412,9 @@

	if (uid != 0 && !debugonly && !tflag)
	errx(EX_NOPERM, "must be root to alter routing table");
	+#ifdef WITHOUT_NETLINK
	shutdown(s, SHUT_RD); /* Don't want to read back our messages */
	+#endif

	TAILQ_INIT(&fibl_head);
	while (argc > 1) {
	@@ -441,6 +460,17 @@

	static int
	flushroutes_fib(int fib)
	+{
	+#ifdef WITHOUT_NETLINK
	+ return (flushroutes_fib_rtsock(fib));
	+#else
	+ return (flushroutes_fib_nl(fib, af));
	+#endif
	+}
	+
	+#ifdef WITHOUT_NETLINK
	+static int
	+flushroutes_fib_rtsock(int fib)
	{
	struct rt_msghdr *rtm;
	size_t needed;
	@@ -525,8 +555,9 @@
	free(buf);
	return (error);
	}
	+#endif

	-static const char *
	+const char *
	routename(struct sockaddr *sa)
	{
	struct sockaddr_dl *sdl;
	@@ -645,7 +676,7 @@
	* Return the name of the network whose address is given.
	* The address is assumed to be that of a net, not a host.
	*/
	-static const char *
	+const char *
	netname(struct sockaddr *sa)
	{
	struct sockaddr_dl *sdl;
	@@ -810,8 +841,10 @@
	warn("sigaction SIGALRM");

	cmd = argv[0];
	+#ifdef WITHOUT_NETLINK
	if (cmd != 'g' && cmd != 's')
	shutdown(s, SHUT_RD); /* Don't want to read back our messages */
	+#endif
	while (--argc > 0) {
	if (**(++argv)== '-') {
	switch (key = keyword(1 + *argv)) {
	@@ -1398,8 +1431,8 @@
	static void
	monitor(int argc, char *argv[])
	{
	- int n, fib, error;
	- char msg[2048], *endptr;
	+ int fib, error;
	+ char *endptr;

	fib = defaultfib;
	while (argc > 1) {
	@@ -1435,6 +1468,19 @@
	interfaces();
	exit(0);
	}
	+#ifdef WITHOUT_NETLINK
	+ monitor_rtsock();
	+#else
	+ monitor_nl(fib);
	+#endif
	+}
	+
	+#ifdef WITHOUT_NETLINK
	+static void
	+monitor_rtsock(void)
	+{
	+ char msg[2048];
	+ int n;

	#ifdef SO_RERROR
	n = 1;
	@@ -1454,25 +1500,12 @@
	print_rtmsg((struct rt_msghdr )(void )msg, n);
	}
	}
	+#endif

	static int
	rtmsg(int cmd, int flags, int fib)
	{
	- int rlen;
	- char *cp = m_rtmsg.m_space;
	- int l;
	-
	-#define NEXTADDR(w, u) \
	- if (rtm_addrs & (w)) { \
	- l = SA_SIZE(&(u)); \
	- memmove(cp, (char *)&(u), l); \
	- cp += l; \
	- if (verbose) \
	- sodump((struct sockaddr *)&(u), #w); \
	- }
	-
	errno = 0;
	- memset(&m_rtmsg, 0, sizeof(m_rtmsg));
	if (cmd == 'a')
	cmd = RTM_ADD;
	else if (cmd == 'c')
	@@ -1488,6 +1521,33 @@
	cmd = RTM_DELETE;
	flags \|= RTF_PINNED;
	}
	+#ifdef WITHOUT_NETLINK
	+ return (rtmsg_rtsock(cmd, flags, fib));
	+#else
	+ errno = rtmsg_nl(cmd, flags, fib, so, &rt_metrics);
	+ return (errno == 0 ? 0 : -1);
	+#endif
	+}
	+
	+#ifdef WITHOUT_NETLINK
	+static int
	+rtmsg_rtsock(int cmd, int flags, int fib)
	+{
	+ int rlen;
	+ char *cp = m_rtmsg.m_space;
	+ int l;
	+
	+ memset(&m_rtmsg, 0, sizeof(m_rtmsg));
	+
	+#define NEXTADDR(w, u) \
	+ if (rtm_addrs & (w)) { \
	+ l = SA_SIZE(&(u)); \
	+ memmove(cp, (char *)&(u), l); \
	+ cp += l; \
	+ if (verbose) \
	+ sodump((struct sockaddr *)&(u), #w); \
	+ }
	+
	#define rtm m_rtmsg.m_rtm
	rtm.rtm_type = cmd;
	rtm.rtm_flags = flags;
	@@ -1545,6 +1605,7 @@
	#undef rtm
	return (0);
	}
	+#endif

	static const char *const msgtypes[] = {
	"",
	@@ -1571,7 +1632,7 @@
	static const char metricnames[] =
	"\011weight\010rttvar\7rtt\6ssthresh\5sendpipe\4recvpipe\3expire"
	"\1mtu";
	-static const char routeflags[] =
	+const char routeflags[] =
	"\1UP\2GATEWAY\3HOST\4REJECT\5DYNAMIC\6MODIFIED\7DONE"
	"\012XRESOLVE\013LLINFO\014STATIC\015BLACKHOLE"
	"\017PROTO2\020PROTO1\021PRCLONING\022WASCLONED\023PROTO3"
	@@ -1812,7 +1873,7 @@
	(void)fflush(stdout);
	}

	-static void
	+void
	printb(int b, const char *str)
	{
	int i;
	diff --git a/sbin/route/route_netlink.c b/sbin/route/route_netlink.c
	new file mode 100644
	--- /dev/null
	+++ b/sbin/route/route_netlink.c
	@@ -0,0 +1,703 @@
	+#include <stdio.h>
	+#include <stdlib.h>
	+#include <string.h>
	+#include <err.h>
	+#include <errno.h>
	+
	+#include <sys/bitcount.h>
	+#include <sys/param.h>
	+#include <sys/socket.h>
	+#include <sys/sysctl.h>
	+#include <sys/time.h>
	+#include <sys/types.h>
	+
	+#include <netinet/in.h>
	+#include <arpa/inet.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 <netlink/netlink_snl_route_compat.h>
	+#include <netlink/netlink_snl_route_parsers.h>
	+
	+const char routename(struct sockaddr );
	+const char netname(struct sockaddr );
	+void printb(int, const char *);
	+extern const char routeflags[];
	+extern int verbose, debugonly;
	+
	+int rtmsg_nl(int cmd, int rtm_flags, int fib, struct sockaddr_storage *so,
	+ struct rt_metrics *rt_metrics);
	+int flushroutes_fib_nl(int fib, int af);
	+void monitor_nl(int fib);
	+
	+struct nl_helper;
	+static void print_getmsg(struct nl_helper h, struct nlmsghdr hdr, struct sockaddr *dst);
	+static void print_nlmsg(struct nl_helper h, struct nlmsghdr hdr);
	+
	+#define s6_addr32 __u6_addr.__u6_addr32
	+#define bitcount32(x) __bitcount32((uint32_t)(x))
	+static int
	+inet6_get_plen(const struct in6_addr *addr)
	+{
	+
	+ return (bitcount32(addr->s6_addr32[0]) + bitcount32(addr->s6_addr32[1]) +
	+ bitcount32(addr->s6_addr32[2]) + bitcount32(addr->s6_addr32[3]));
	+}
	+
	+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 struct sockaddr *
	+get_netmask(struct snl_state *ss, int family, int plen)
	+{
	+ if (family == AF_INET) {
	+ if (plen == 32)
	+ return (NULL);
	+
	+ struct sockaddr_in sin = snl_allocz(ss, sizeof(sin));
	+
	+ sin->sin_len = sizeof(*sin);
	+ sin->sin_family = family;
	+ sin->sin_addr.s_addr = htonl(plen ? ~((1 << (32 - plen)) - 1) : 0);
	+
	+ return (struct sockaddr *)sin;
	+ } else if (family == AF_INET6) {
	+ if (plen == 128)
	+ return (NULL);
	+
	+ struct sockaddr_in6 sin6 = snl_allocz(ss, sizeof(sin6));
	+
	+ sin6->sin6_len = sizeof(*sin6);
	+ sin6->sin6_family = family;
	+ ip6_writemask(&sin6->sin6_addr, plen);
	+
	+ return (struct sockaddr *)sin6;
	+ }
	+ return (NULL);
	+}
	+
	+struct nl_helper {
	+ struct snl_state ss_cmd;
	+};
	+
	+static void
	+nl_helper_init(struct nl_helper *h)
	+{
	+ if (!snl_init(&h->ss_cmd, NETLINK_ROUTE))
	+ err(1, "unable to open netlink socket");
	+}
	+
	+static void
	+nl_helper_free(struct nl_helper *h)
	+{
	+ snl_free(&h->ss_cmd);
	+}
	+
	+static int
	+rtmsg_nl_int(struct nl_helper *h, int cmd, int rtm_flags, int fib,
	+ struct sockaddr_storage so, struct rt_metrics rt_metrics)
	+{
	+ struct snl_state *ss = &h->ss_cmd;
	+ struct snl_writer nw;
	+ int nl_type = 0, nl_flags = 0;
	+
	+ snl_init_writer(ss, &nw);
	+
	+ switch (cmd) {
	+ case RTSOCK_RTM_ADD:
	+ nl_type = RTM_NEWROUTE;
	+ nl_flags = NLM_F_CREATE \| NLM_F_APPEND; /* Do append by default */
	+ break;
	+ case RTSOCK_RTM_CHANGE:
	+ nl_type = RTM_NEWROUTE;
	+ nl_flags = NLM_F_REPLACE;
	+ break;
	+ case RTSOCK_RTM_DELETE:
	+ nl_type = RTM_DELROUTE;
	+ break;
	+ case RTSOCK_RTM_GET:
	+ nl_type = RTM_GETROUTE;
	+ break;
	+ default:
	+ exit(1);
	+ }
	+
	+ struct sockaddr dst = (struct sockaddr )&so[RTAX_DST];
	+ struct sockaddr mask = (struct sockaddr )&so[RTAX_NETMASK];
	+ struct sockaddr gw = (struct sockaddr )&so[RTAX_GATEWAY];
	+
	+ if (dst == NULL)
	+ return (EINVAL);
	+
	+ struct nlmsghdr *hdr = snl_create_msg_request(&nw, nl_type);
	+ hdr->nlmsg_flags \|= nl_flags;
	+
	+ int plen = 0;
	+ int rtm_type = RTN_UNICAST;
	+
	+ switch (dst->sa_family) {
	+ case AF_INET:
	+ {
	+ struct sockaddr_in mask4 = (struct sockaddr_in )mask;
	+
	+ plen = mask4 ? bitcount32(mask4->sin_addr.s_addr) : 32;
	+ break;
	+ }
	+ case AF_INET6:
	+ {
	+ struct sockaddr_in6 mask6 = (struct sockaddr_in6 )mask;
	+
	+ plen = mask6 ? inet6_get_plen(&mask6->sin6_addr) : 128;
	+ break;
	+ }
	+ default:
	+ return (ENOTSUP);
	+ }
	+
	+ if (rtm_flags & RTF_REJECT)
	+ rtm_type = RTN_PROHIBIT;
	+ else if (rtm_flags & RTF_BLACKHOLE)
	+ rtm_type = RTN_BLACKHOLE;
	+
	+ struct rtmsg *rtm = snl_reserve_msg_object(&nw, struct rtmsg);
	+ rtm->rtm_family = dst->sa_family;
	+ rtm->rtm_protocol = RTPROT_STATIC;
	+ rtm->rtm_type = rtm_type;
	+ rtm->rtm_dst_len = plen;
	+
	+ snl_add_msg_attr_ip(&nw, RTA_DST, dst);
	+ snl_add_msg_attr_u32(&nw, RTA_TABLE, fib);
	+
	+ if (rtm_flags & RTF_GATEWAY) {
	+ if (gw->sa_family == dst->sa_family)
	+ snl_add_msg_attr_ip(&nw, RTA_GATEWAY, gw);
	+ else
	+ snl_add_msg_attr_ipvia(&nw, RTA_VIA, gw);
	+ } else if (gw != NULL) {
	+ /* Should be AF_LINK */
	+ struct sockaddr_dl sdl = (struct sockaddr_dl )gw;
	+ if (sdl->sdl_index != 0)
	+ snl_add_msg_attr_u32(&nw, RTA_OIF, sdl->sdl_index);
	+ }
	+
	+ if (rtm_flags != 0)
	+ snl_add_msg_attr_u32(&nw, NL_RTA_RTFLAGS, rtm_flags);
	+
	+ if (rt_metrics->rmx_mtu > 0) {
	+ int off = snl_add_msg_attr_nested(&nw, RTA_METRICS);
	+ snl_add_msg_attr_u32(&nw, RTAX_MTU, rt_metrics->rmx_mtu);
	+ snl_end_attr_nested(&nw, off);
	+ }
	+
	+ if (rt_metrics->rmx_weight > 0)
	+ snl_add_msg_attr_u32(&nw, NL_RTA_WEIGHT, rt_metrics->rmx_weight);
	+
	+ if (snl_finalize_msg(&nw) && snl_send_message(ss, hdr)) {
	+ struct snl_errmsg_data e = {};
	+
	+ hdr = snl_read_reply(ss, hdr->nlmsg_seq);
	+ if (nl_type == NL_RTM_GETROUTE) {
	+ if (hdr->nlmsg_type == NL_RTM_NEWROUTE)
	+ print_getmsg(h, hdr, dst);
	+ else {
	+ snl_parse_errmsg(ss, hdr, &e);
	+ if (e.error == ESRCH)
	+ warn("route has not been found");
	+ else
	+ warn("message indicates error %d", e.error);
	+ }
	+
	+ return (0);
	+ }
	+
	+ if (snl_parse_errmsg(ss, hdr, &e))
	+ return (e.error);
	+ }
	+ return (EINVAL);
	+}
	+
	+int
	+rtmsg_nl(int cmd, int rtm_flags, int fib, struct sockaddr_storage *so,
	+ struct rt_metrics *rt_metrics)
	+{
	+ struct nl_helper h = {};
	+
	+ nl_helper_init(&h);
	+ int error = rtmsg_nl_int(&h, cmd, rtm_flags, fib, so, rt_metrics);
	+ nl_helper_free(&h);
	+
	+ return (error);
	+}
	+
	+static bool
	+get_ifdata(struct nl_helper h, uint32_t ifindex, struct snl_parsed_link_simple link)
	+{
	+ struct snl_state *ss = &h->ss_cmd;
	+ struct snl_writer nw;
	+
	+ snl_init_writer(ss, &nw);
	+ struct nlmsghdr *hdr = snl_create_msg_request(&nw, NL_RTM_GETLINK);
	+ struct ifinfomsg *ifmsg = snl_reserve_msg_object(&nw, struct ifinfomsg);
	+ if (ifmsg != NULL)
	+ ifmsg->ifi_index = ifindex;
	+ if (!snl_finalize_msg(&nw) \|\| !snl_send_message(ss, hdr))
	+ return (false);
	+
	+ hdr = snl_read_reply(ss, hdr->nlmsg_seq);
	+
	+ if (hdr != NULL && hdr->nlmsg_type == RTM_NEWLINK) {
	+ if (snl_parse_nlmsg(ss, hdr, &snl_rtm_link_parser_simple, link)) {
	+ return (link->ifla_ifname != NULL);
	+ }
	+ }
	+ return (false);
	+}
	+
	+static void
	+print_getmsg(struct nl_helper h, struct nlmsghdr hdr, struct sockaddr *dst)
	+{
	+ struct snl_state *ss = &h->ss_cmd;
	+ struct timespec ts;
	+ struct snl_parsed_route r = { .rtax_weight = RT_DEFAULT_WEIGHT };
	+
	+ if (!snl_parse_nlmsg(ss, hdr, &snl_rtm_route_parser, &r))
	+ return;
	+
	+ struct snl_parsed_link_simple link = {};
	+ if (!get_ifdata(h, r.rta_oif, &link))
	+ return;
	+
	+ if (r.rtax_mtu == 0)
	+ r.rtax_mtu = link.ifla_mtu;
	+ r.rta_rtflags \|= (RTF_UP \| RTF_DONE);
	+
	+ (void)printf(" route to: %s\n", routename(dst));
	+
	+ if (r.rta_dst)
	+ (void)printf("destination: %s\n", routename(r.rta_dst));
	+ struct sockaddr *mask = get_netmask(ss, r.rtm_family, r.rtm_dst_len);
	+ if (mask)
	+ (void)printf(" mask: %s\n", routename(mask));
	+ if (r.rta_gw && (r.rta_rtflags & RTF_GATEWAY))
	+ (void)printf(" gateway: %s\n", routename(r.rta_gw));
	+ (void)printf(" fib: %u\n", (unsigned int)r.rta_table);
	+ if (link.ifla_ifname)
	+ (void)printf(" interface: %s\n", link.ifla_ifname);
	+ (void)printf(" flags: ");
	+ printb(r.rta_rtflags, routeflags);
	+
	+ struct rt_metrics rmx = {
	+ .rmx_mtu = r.rtax_mtu,
	+ .rmx_weight = r.rtax_weight,
	+ .rmx_expire = r.rta_expire,
	+ };
	+
	+ printf("\n%9s %9s %9s %9s %9s %10s %9s\n", "recvpipe",
	+ "sendpipe", "ssthresh", "rtt,msec", "mtu ", "weight", "expire");
	+ printf("%8lu ", rmx.rmx_recvpipe);
	+ printf("%8lu ", rmx.rmx_sendpipe);
	+ printf("%8lu ", rmx.rmx_ssthresh);
	+ printf("%8lu ", 0UL);
	+ printf("%8lu ", rmx.rmx_mtu);
	+ printf("%8lu ", rmx.rmx_weight);
	+ if (rmx.rmx_expire > 0)
	+ clock_gettime(CLOCK_REALTIME_FAST, &ts);
	+ else
	+ ts.tv_sec = 0;
	+ printf("%8ld \n", (long)(rmx.rmx_expire - ts.tv_sec));
	+}
	+
	+static char *
	+print_prefix(struct nl_helper h, char buf, int bufsize, struct sockaddr *sa, int plen)
	+{
	+ int sz = 0;
	+
	+ switch (sa->sa_family) {
	+ case AF_INET:
	+ {
	+ struct sockaddr_in sin = (struct sockaddr_in )sa;
	+ char abuf[INET_ADDRSTRLEN];
	+
	+ inet_ntop(AF_INET, &sin->sin_addr, abuf, sizeof(abuf));
	+ sz = snprintf(buf, bufsize, "%s", abuf);
	+ break;
	+ }
	+ case AF_INET6:
	+ {
	+ struct sockaddr_in6 sin6 = (struct sockaddr_in6 )sa;
	+ char abuf[INET6_ADDRSTRLEN], ifbuf[16];
	+ char *ifname = NULL;
	+
	+ inet_ntop(AF_INET6, &sin6->sin6_addr, abuf, sizeof(abuf));
	+ if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
	+ struct snl_parsed_link_simple link = {};
	+ if (sin6->sin6_scope_id != 0) {
	+ if (get_ifdata(h, sin6->sin6_scope_id, &link))
	+ ifname = link.ifla_ifname;
	+ else {
	+ snprintf(ifbuf, sizeof(ifbuf),
	+ "if#%d", sin6->sin6_scope_id);
	+ ifname = ifbuf;
	+ }
	+ }
	+ }
	+ if (ifname == NULL)
	+ sz = snprintf(buf, bufsize, "%s", abuf);
	+ else
	+ sz = snprintf(buf, bufsize, "%s%%%s", abuf, ifname);
	+ break;
	+ }
	+ default:
	+ snprintf(buf, bufsize, "unknown_af#%d", sa->sa_family);
	+ plen = -1;
	+ }
	+
	+ if (plen >= 0)
	+ snprintf(buf + sz, bufsize - sz, "/%d", plen);
	+
	+ return (buf);
	+}
	+
	+
	+static int
	+print_line_prefix(const char *cmd_name)
	+{
	+ struct timespec tp;
	+ struct tm tm;
	+ char buf[32];
	+
	+ clock_gettime(CLOCK_REALTIME, &tp);
	+ localtime_r(&tp.tv_sec, &tm);
	+
	+ strftime(buf, sizeof(buf), "%T", &tm);
	+ int len = printf("%s.%03ld %s ", buf, tp.tv_nsec / 1000000, cmd_name);
	+
	+ return (len);
	+}
	+
	+static void
	+print_nlmsg_route_nhop(struct nl_helper h, struct snl_parsed_route r,
	+ struct rta_mpath_nh *nh, bool first)
	+{
	+ // gw 10.0.0.1 ifp vtnet0 mtu 1500 table inet.0
	+ if (nh->gw != NULL) {
	+ char gwbuf[128];
	+ print_prefix(h, gwbuf, sizeof(gwbuf), nh->gw, -1);
	+ printf("gw %s ", gwbuf);
	+ }
	+
	+ if (nh->ifindex != 0) {
	+ struct snl_parsed_link_simple link = {};
	+ char ifbuf[16], *ifname = NULL;
	+
	+ if (get_ifdata(h, nh->ifindex, &link)) {
	+ ifname = link.ifla_ifname;
	+ if (nh->rtax_mtu == 0)
	+ nh->rtax_mtu = link.ifla_mtu;
	+ } else {
	+ snprintf(ifbuf, sizeof(ifbuf), "if#%d", nh->ifindex);
	+ ifname = ifbuf;
	+ }
	+ printf("iface %s ", ifname);
	+ if (nh->rtax_mtu != 0)
	+ printf("mtu %d ", nh->rtax_mtu);
	+ }
	+
	+ if (first) {
	+ switch (r->rtm_family) {
	+ case AF_INET:
	+ printf("table inet.%d", r->rta_table);
	+ break;
	+ case AF_INET6:
	+ printf("table inet6.%d", r->rta_table);
	+ break;
	+ }
	+ }
	+
	+ printf("\n");
	+}
	+
	+static void
	+print_nlmsg_route(struct nl_helper h, struct nlmsghdr hdr)
	+{
	+ struct snl_parsed_route r = { .rtax_weight = RT_DEFAULT_WEIGHT };
	+ struct snl_state *ss = &h->ss_cmd;
	+
	+ if (!snl_parse_nlmsg(ss, hdr, &snl_rtm_route_parser, &r))
	+ return;
	+
	+ // 20:19:41.333 add route 10.0.0.0/24 gw 10.0.0.1 ifp vtnet0 mtu 1500 table inet.0
	+
	+ char *cmd_name = "";
	+ if (hdr->nlmsg_type == RTM_NEWROUTE) {
	+ if (hdr->nlmsg_flags & NLM_F_REPLACE)
	+ cmd_name = "replace route";
	+ else
	+ cmd_name = "add route";
	+ } else
	+ cmd_name = "delete route";
	+
	+ int len = print_line_prefix(cmd_name);
	+
	+ char buf[128];
	+ print_prefix(h, buf, sizeof(buf), r.rta_dst, r.rtm_dst_len);
	+ len += strlen(buf) + 1;
	+ printf("%s ", buf);
	+
	+ switch (r.rtm_type) {
	+ case RTN_BLACKHOLE:
	+ printf("blackhole\n");
	+ return;
	+ case RTN_UNREACHABLE:
	+ printf("unreach(reject)\n");
	+ return;
	+ case RTN_PROHIBIT:
	+ printf("prohibit(reject)\n");
	+ return;
	+ }
	+
	+ if (r.rta_multipath != NULL) {
	+ bool first = true;
	+
	+ memset(buf, ' ', sizeof(buf));
	+ buf[len] = '\0';
	+
	+ for (int i = 0; i < r.rta_multipath->num_nhops; i++) {
	+ struct rta_mpath_nh *nh = &r.rta_multipath->nhops[i];
	+
	+ if (!first)
	+ printf("%s", buf);
	+ print_nlmsg_route_nhop(h, &r, nh, first);
	+ first = false;
	+ }
	+ } else {
	+ struct rta_mpath_nh nh = {
	+ .gw = r.rta_gw,
	+ .ifindex = r.rta_oif,
	+ .rtax_mtu = r.rtax_mtu,
	+ };
	+
	+ print_nlmsg_route_nhop(h, &r, &nh, true);
	+ }
	+}
	+
	+static void
	+print_nlmsg_link(struct nl_helper h, struct nlmsghdr hdr)
	+{
	+}
	+
	+static void
	+print_nlmsg_addr(struct nl_helper h, struct nlmsghdr hdr)
	+{
	+}
	+
	+static void
	+print_nlmsg_neigh(struct nl_helper h, struct nlmsghdr hdr)
	+{
	+}
	+
	+static void
	+print_nlmsg_generic(struct nl_helper h, struct nlmsghdr hdr)
	+{
	+}
	+
	+static void
	+print_nlmsg(struct nl_helper h, struct nlmsghdr hdr)
	+{
	+ switch (hdr->nlmsg_type) {
	+ case RTM_NEWLINK:
	+ case RTM_DELLINK:
	+ print_nlmsg_link(h, hdr);
	+ break;
	+ case RTM_NEWADDR:
	+ case RTM_DELADDR:
	+ print_nlmsg_addr(h, hdr);
	+ break;
	+ case RTM_NEWROUTE:
	+ case RTM_DELROUTE:
	+ print_nlmsg_route(h, hdr);
	+ break;
	+ case RTM_NEWNEIGH:
	+ case RTM_DELNEIGH:
	+ print_nlmsg_neigh(h, hdr);
	+ break;
	+ default:
	+ print_nlmsg_generic(h, hdr);
	+ }
	+
	+ snl_clear_lb(&h->ss_cmd);
	+}
	+
	+void
	+monitor_nl(int fib)
	+{
	+ struct snl_state ss_event = {};
	+ struct nl_helper h;
	+
	+ if (!snl_init(&ss_event, NETLINK_ROUTE))
	+ err(1, "unable to open netlink socket");
	+ nl_helper_init(&h);
	+
	+ int groups[] = {
	+ RTNLGRP_LINK,
	+ RTNLGRP_NEIGH,
	+ RTNLGRP_NEXTHOP,
	+ RTNLGRP_IPV4_IFADDR,
	+ RTNLGRP_IPV4_ROUTE,
	+ RTNLGRP_IPV6_IFADDR,
	+ RTNLGRP_IPV6_ROUTE,
	+ };
	+
	+ for (unsigned int i = 0; i < NL_ARRAY_LEN(groups); i++) {
	+ int error;
	+ int optval = groups[i];
	+ socklen_t optlen = sizeof(optval);
	+ error = setsockopt(ss_event.fd, SOL_NETLINK,
	+ NETLINK_ADD_MEMBERSHIP, &optval, optlen);
	+ if (error != 0)
	+ warn("Unable to subscribe to group %d", optval);
	+ }
	+
	+ struct nlmsghdr *hdr;
	+
	+ while ((hdr = snl_read_message(&ss_event)) != NULL)
	+ {
	+ print_nlmsg(&h, hdr);
	+ snl_clear_lb(&h.ss_cmd);
	+ snl_clear_lb(&ss_event);
	+ }
	+
	+ snl_free(&ss_event);
	+ nl_helper_free(&h);
	+ exit(0);
	+}
	+
	+static void
	+print_flushed_route(struct snl_parsed_route r, struct sockaddr gw)
	+{
	+ struct sockaddr *sa = r->rta_dst;
	+
	+ printf("%-20.20s ", r->rta_rtflags & RTF_HOST ?
	+ routename(sa) : netname(sa));
	+ sa = gw;
	+ printf("%-20.20s ", routename(sa));
	+ if (r->rta_table >= 0)
	+ printf("-fib %-3d ", r->rta_table);
	+ printf("done\n");
	+}
	+
	+static int
	+flushroute_one(struct nl_helper h, struct snl_parsed_route r)
	+{
	+ struct snl_state *ss = &h->ss_cmd;
	+ struct snl_errmsg_data e = {};
	+ struct snl_writer nw;
	+
	+ snl_init_writer(ss, &nw);
	+
	+ struct nlmsghdr *hdr = snl_create_msg_request(&nw, NL_RTM_DELROUTE);
	+ struct rtmsg *rtm = snl_reserve_msg_object(&nw, struct rtmsg);
	+ rtm->rtm_family = r->rtm_family;
	+ rtm->rtm_dst_len = r->rtm_dst_len;
	+
	+ snl_add_msg_attr_u32(&nw, RTA_TABLE, r->rta_table);
	+ snl_add_msg_attr_ip(&nw, RTA_DST, r->rta_dst);
	+
	+ if (!snl_finalize_msg(&nw) \|\| !snl_send_message(ss, hdr))
	+ return (ENOMEM);
	+
	+ if (!snl_read_reply_code(ss, hdr->nlmsg_seq, &e)) {
	+ return (e.error);
	+ if (e.error == EPERM)
	+ errc(1, e.error, "RTM_DELROUTE failed:");
	+ else
	+ warnc(e.error, "RTM_DELROUTE failed:");
	+ return (true);
	+ };
	+
	+ if (verbose)
	+ print_nlmsg(h, hdr);
	+ else {
	+ if (r->rta_multipath != NULL) {
	+ for (int i = 0; i < r->rta_multipath->num_nhops; i++) {
	+ struct rta_mpath_nh *nh = &r->rta_multipath->nhops[i];
	+
	+ print_flushed_route(r, nh->gw);
	+ }
	+
	+ } else
	+ print_flushed_route(r, r->rta_gw);
	+ }
	+
	+ return (0);
	+}
	+
	+int
	+flushroutes_fib_nl(int fib, int af)
	+{
	+ struct snl_state ss = {};
	+ struct snl_writer nw;
	+ struct nl_helper h = {};
	+
	+ snl_init(&ss, NETLINK_ROUTE);
	+ snl_init_writer(&ss, &nw);
	+
	+ struct nlmsghdr *hdr = snl_create_msg_request(&nw, NL_RTM_GETROUTE);
	+ hdr->nlmsg_flags \|= NLM_F_DUMP;
	+ struct rtmsg *rtm = snl_reserve_msg_object(&nw, struct rtmsg);
	+ rtm->rtm_family = af;
	+ snl_add_msg_attr_u32(&nw, RTA_TABLE, fib);
	+
	+ if (!snl_finalize_msg(&nw) \|\| !snl_send_message(&ss, hdr)) {
	+ snl_free(&ss);
	+ return (EINVAL);
	+ }
	+
	+ struct snl_errmsg_data e = {};
	+ uint32_t nlm_seq = hdr->nlmsg_seq;
	+
	+ nl_helper_init(&h);
	+
	+ while ((hdr = snl_read_reply_multi(&ss, nlm_seq, &e)) != NULL) {
	+ struct snl_parsed_route r = { .rtax_weight = RT_DEFAULT_WEIGHT };
	+ int error;
	+
	+ if (!snl_parse_nlmsg(&ss, hdr, &snl_rtm_route_parser, &r))
	+ continue;
	+ if (verbose)
	+ print_nlmsg(&h, hdr);
	+ if (r.rta_table != (uint32_t)fib \|\| r.rtm_family != af)
	+ continue;
	+ if ((r.rta_rtflags & RTF_GATEWAY) == 0)
	+ continue;
	+ if (debugonly)
	+ continue;
	+
	+ if ((error = flushroute_one(&h, &r)) != 0) {
	+ if (error == EPERM)
	+ errc(1, error, "RTM_DELROUTE failed:");
	+ else
	+ warnc(error, "RTM_DELROUTE failed:");
	+ }
	+ snl_clear_lb(&h.ss_cmd);
	+ }
	+
	+ snl_free(&ss);
	+ nl_helper_free(&h);
	+
	+ return (e.error);
	+}
	+

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