2 * SPDX-License-Identifier: BSD-2-Clause
4 * Copyright (c) 2022 Alexander V. Chernikov <melifaro@FreeBSD.org>
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 #ifndef _NETLINK_NETLINK_SNL_GENERIC_H_
28 #define _NETLINK_NETLINK_SNL_GENERIC_H_
30 #include <netlink/netlink.h>
31 #include <netlink/netlink_generic.h>
32 #include <netlink/netlink_snl.h>
34 /* Genetlink helpers */
35 static inline struct nlmsghdr *
36 snl_create_genl_msg_request(struct snl_writer *nw, int genl_family, uint8_t genl_cmd)
38 assert(nw->hdr == NULL);
40 struct nlmsghdr *hdr = snl_reserve_msg_object(nw, struct nlmsghdr);
41 hdr->nlmsg_type = genl_family;
42 hdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
44 struct genlmsghdr *ghdr = snl_reserve_msg_object(nw, struct genlmsghdr);
50 static struct snl_field_parser snl_fp_genl[] = {};
52 #define SNL_DECLARE_GENL_PARSER(_name, _np) SNL_DECLARE_PARSER(_name,\
53 struct genlmsghdr, snl_fp_genl, _np)
55 struct _getfamily_attrs {
60 #define _IN(_field) offsetof(struct genlmsghdr, _field)
61 #define _OUT(_field) offsetof(struct _getfamily_attrs, _field)
62 static struct snl_attr_parser _nla_p_getfam[] = {
63 { .type = CTRL_ATTR_FAMILY_ID , .off = _OUT(family_id), .cb = snl_attr_get_uint16 },
64 { .type = CTRL_ATTR_FAMILY_NAME, .off = _OUT(family_name), .cb = snl_attr_get_string },
68 SNL_DECLARE_GENL_PARSER(_genl_ctrl_getfam_parser, _nla_p_getfam);
70 static inline uint16_t
71 snl_get_genl_family(struct snl_state *ss, const char *family_name)
76 snl_init_writer(ss, &nw);
77 hdr = snl_create_genl_msg_request(&nw, GENL_ID_CTRL, CTRL_CMD_GETFAMILY);
78 snl_add_msg_attr_string(&nw, CTRL_ATTR_FAMILY_NAME, family_name);
79 if (snl_finalize_msg(&nw) == NULL || !snl_send_message(ss, hdr))
82 hdr = snl_read_reply(ss, hdr->nlmsg_seq);
83 if (hdr != NULL && hdr->nlmsg_type != NLMSG_ERROR) {
84 struct _getfamily_attrs attrs = {};
86 if (snl_parse_nlmsg(ss, hdr, &_genl_ctrl_getfam_parser, &attrs))
87 return (attrs.family_id);
93 static const struct snl_hdr_parser *snl_all_genl_parsers[] = {
94 &_genl_ctrl_getfam_parser,