+// SPDX-License-Identifier: GPL-2.0-or-later
/* Declarations and definitions for kernel interaction over netlink
* Copyright (C) 2016 Cumulus Networks, Inc.
- *
- * This file is part of GNU Zebra.
- *
- * GNU Zebra 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, or (at your option) any
- * later version.
- *
- * GNU Zebra is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; see the file COPYING; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef _ZEBRA_KERNEL_NETLINK_H
((struct rtattr *)(((char *)(h)) + NLMSG_ALIGN(sizeof(struct nhmsg))))
-#define NL_RCV_PKT_BUF_SIZE 32768
+#define NL_RCV_PKT_BUF_SIZE (34 * 1024)
#define NL_PKT_BUF_SIZE 8192
/*
uint16_t data);
extern bool nl_attr_put32(struct nlmsghdr *n, unsigned int maxlen, int type,
uint32_t data);
+extern bool nl_attr_put64(struct nlmsghdr *n, unsigned int maxlen, int type,
+ uint64_t data);
/*
* nl_attr_nest - start an attribute nest.
unsigned short flags);
extern void netlink_parse_rtattr_nested(struct rtattr **tb, int max,
struct rtattr *rta);
+/*
+ * nl_addraw_l copies raw form the netlink message buffer into netlink
+ * message header pointer. It ensures the aligned data buffer does not
+ * override past max length.
+ * return value is 0 if its successful
+ */
+extern bool nl_addraw_l(struct nlmsghdr *n, unsigned int maxlen,
+ const void *data, unsigned int len);
+/*
+ * nl_rta_put - add an additional optional attribute(rtattr) to the
+ * Netlink message buffer.
+ *
+ * Returns true if the attribute could be added to the message (fits into the
+ * buffer), otherwise false is returned.
+ */
+extern bool nl_rta_put(struct rtattr *rta, unsigned int maxlen, int type,
+ const void *data, int alen);
+extern bool nl_rta_put16(struct rtattr *rta, unsigned int maxlen, int type,
+ uint16_t data);
+extern bool nl_rta_put64(struct rtattr *rta, unsigned int maxlen, int type,
+ uint64_t data);
+/*
+ * nl_rta_nest - start an additional optional attribute (rtattr) nest.
+ *
+ * Returns a valid pointer to the beginning of the nest if the attribute
+ * describing the nest could be added to the message (fits into the buffer),
+ * otherwise NULL is returned.
+ */
+extern struct rtattr *nl_rta_nest(struct rtattr *rta, unsigned int maxlen,
+ int type);
+/*
+ * nl_rta_nest_end - finalize nesting of an aditionl optionl attributes.
+ *
+ * Updates the length field of the attribute header to include the appeneded
+ * attributes. Returns a total length of the Netlink message.
+ */
+extern int nl_rta_nest_end(struct rtattr *rta, struct rtattr *nest);
extern const char *nl_msg_type_to_str(uint16_t msg_type);
extern const char *nl_rtproto_to_str(uint8_t rtproto);
extern const char *nl_family_to_str(uint8_t family);
extern const char *nl_rttype_to_str(uint8_t rttype);
extern int netlink_parse_info(int (*filter)(struct nlmsghdr *, ns_id_t, int),
- const struct nlsock *nl,
+ struct nlsock *nl,
const struct zebra_dplane_info *dp_info,
int count, bool startup);
extern int netlink_talk_filter(struct nlmsghdr *h, ns_id_t ns, int startup);
extern void netlink_set_batch_buffer_size(uint32_t size, uint32_t threshold,
bool set);
+extern struct nlsock *kernel_netlink_nlsock_lookup(int sock);
#endif /* HAVE_NETLINK */
#ifdef __cplusplus