pf: convert DIOCRCLRADDRS to netlink

Sponsored by:	Rubicon Communications, LLC ("Netgate")

lib/libpfctl/libpfctl.c

@@ -3324,3 +3324,45 @@ pfctl_clear_tstats(struct pfctl_handle *h, const struct pfr_table *filter,
 
 	return (e.error);
 }
+
+int
+pfctl_clear_addrs(struct pfctl_handle *h, const struct pfr_table *filter,
+    int *ndel, int flags)
+{
+	struct snl_writer nw;
+	struct snl_errmsg_data e = {};
+	struct nlmsghdr *hdr;
+	uint64_t del;
+	uint32_t seq_id;
+	int family_id;
+
+	family_id = snl_get_genl_family(&h->ss, PFNL_FAMILY_NAME);
+	if (family_id == 0)
+		return (ENOTSUP);
+
+	snl_init_writer(&h->ss, &nw);
+	hdr = snl_create_genl_msg_request(&nw, family_id, PFNL_CMD_CLR_ADDRS);
+
+	snl_add_msg_attr_string(&nw, PF_T_ANCHOR, filter->pfrt_anchor);
+	snl_add_msg_attr_string(&nw, PF_T_NAME, filter->pfrt_name);
+	snl_add_msg_attr_u32(&nw, PF_T_TABLE_FLAGS, filter->pfrt_flags);
+	snl_add_msg_attr_u32(&nw, PF_T_FLAGS, flags);
+
+	if ((hdr = snl_finalize_msg(&nw)) == NULL)
+		return (ENXIO);
+
+	seq_id = hdr->nlmsg_seq;
+
+	if (!snl_send_message(&h->ss, hdr))
+		return (ENXIO);
+
+	while ((hdr = snl_read_reply_multi(&h->ss, seq_id, &e)) != NULL) {
+		if (!snl_parse_nlmsg(&h->ss, hdr, &tstats_clr_parser, &del))
+			continue;
+		if (ndel)
+			*ndel = (uint32_t)del;
+	}
+
+	return (e.error);
+}
+

lib/libpfctl/libpfctl.h

@@ -556,5 +556,7 @@ int	pfctl_get_tstats(struct pfctl_handle *h, const struct pfr_table *filter,
 	    pfctl_get_tstats_fn fn, void *arg);
 int	pfctl_clear_tstats(struct pfctl_handle *h, const struct pfr_table *filter,
 	    int *nzero, int flags);
+int	pfctl_clear_addrs(struct pfctl_handle *h, const struct pfr_table *filter,
+	    int *ndel, int flags);
 
 #endif

sbin/pfctl/pfctl_radix.c

@@ -113,20 +113,7 @@ pfr_get_tables(struct pfr_table *filter, struct pfr_table *tbl, int *size,
 int
 pfr_clr_addrs(struct pfr_table *tbl, int *ndel, int flags)
 {
-	struct pfioc_table io;
+	return (pfctl_clear_addrs(pfh, tbl, ndel, flags));
-
-	if (tbl == NULL) {
-		errno = EINVAL;
-		return (-1);
-	}
-	bzero(&io, sizeof io);
-	io.pfrio_flags = flags;
-	io.pfrio_table = *tbl;
-	if (ioctl(dev, DIOCRCLRADDRS, &io))
-		return (-1);
-	if (ndel != NULL)
-		*ndel = io.pfrio_ndel;
-	return (0);
 }
 
 int

sys/netpfil/pf/pf_nl.c

@@ -2073,6 +2073,43 @@ pf_handle_clear_tstats(struct nlmsghdr *hdr, struct nl_pstate *npt)
 	return (error);
 }
 
+static int
+pf_handle_clear_addrs(struct nlmsghdr *hdr, struct nl_pstate *npt)
+{
+	struct pfioc_table attrs = { 0 };
+	struct nl_writer *nw = npt->nw;
+	struct genlmsghdr *ghdr_new;
+	int error;
+	int ndel;
+
+	error = nl_parse_nlmsg(hdr, &table_parser, npt, &attrs);
+	if (error != 0)
+		return (error);
+
+	PF_RULES_WLOCK();
+	error = pfr_clr_addrs(&attrs.pfrio_table, &ndel,
+	    attrs.pfrio_flags | PFR_FLAG_USERIOCTL);
+	PF_RULES_WUNLOCK();
+
+	if (error)
+		return (error);
+
+	if (!nlmsg_reply(nw, hdr, sizeof(struct genlmsghdr)))
+		return (ENOMEM);
+
+	ghdr_new = nlmsg_reserve_object(nw, struct genlmsghdr);
+	ghdr_new->cmd = PFNL_CMD_CLR_ADDRS;
+	ghdr_new->version = 0;
+	ghdr_new->reserved = 0;
+
+	nlattr_add_u64(nw, PF_T_NBR_DELETED, ndel);
+
+	if (!nlmsg_end(nw))
+		return (ENOMEM);
+
+	return (error);
+}
+
 static const struct nlhdr_parser *all_parsers[] = {
 	&state_parser,
 	&addrule_parser,
@@ -2302,6 +2339,13 @@ static const struct genl_cmd pf_cmds[] = {
 		.cmd_flags = GENL_CMD_CAP_DO | GENL_CMD_CAP_HASPOL,
 		.cmd_priv = PRIV_NETINET_PF,
 	},
+	{
+		.cmd_num = PFNL_CMD_CLR_ADDRS,
+		.cmd_name = "CRL_ADDRS",
+		.cmd_cb = pf_handle_clear_addrs,
+		.cmd_flags = GENL_CMD_CAP_DO | GENL_CMD_CAP_HASPOL,
+		.cmd_priv = PRIV_NETINET_PF,
+	},
 };
 
 void

sys/netpfil/pf/pf_nl.h

@@ -66,6 +66,7 @@ enum {
 	PFNL_CMD_DEL_TABLE = 28,
 	PFNL_CMD_GET_TSTATS = 29,
 	PFNL_CMD_CLR_TSTATS = 30,
+	PFNL_CMD_CLR_ADDRS = 31,
 	__PFNL_CMD_MAX,
 };
 #define PFNL_CMD_MAX (__PFNL_CMD_MAX -1)