123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135 |
- /*-
- * SPDX-License-Identifier: BSD-2-Clause
- *
- * Copyright (c) 2022 Alexander V. Chernikov <melifaro@FreeBSD.org>
- *
- * 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.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
- */
- #ifndef _NETLINK_NETLINK_SNL_GENERIC_H_
- #define _NETLINK_NETLINK_SNL_GENERIC_H_
- #include <netlink/netlink.h>
- #include <netlink/netlink_generic.h>
- #include <netlink/netlink_snl.h>
- /* Genetlink helpers */
- static inline struct nlmsghdr *
- snl_create_genl_msg_request(struct snl_writer *nw, int genl_family, uint8_t genl_cmd)
- {
- assert(nw->hdr == NULL);
- struct nlmsghdr *hdr = snl_reserve_msg_object(nw, struct nlmsghdr);
- hdr->nlmsg_type = genl_family;
- hdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
- nw->hdr = hdr;
- struct genlmsghdr *ghdr = snl_reserve_msg_object(nw, struct genlmsghdr);
- ghdr->cmd = genl_cmd;
- return (hdr);
- }
- static struct snl_field_parser snl_fp_genl[] = {};
- #define SNL_DECLARE_GENL_PARSER(_name, _np) SNL_DECLARE_PARSER(_name,\
- struct genlmsghdr, snl_fp_genl, _np)
- struct snl_genl_ctrl_mcast_group {
- uint32_t mcast_grp_id;
- char *mcast_grp_name;
- };
- struct snl_genl_ctrl_mcast_groups {
- uint32_t num_groups;
- struct snl_genl_ctrl_mcast_group **groups;
- };
- #define _OUT(_field) offsetof(struct snl_genl_ctrl_mcast_group, _field)
- static struct snl_attr_parser _nla_p_getmc[] = {
- { .type = CTRL_ATTR_MCAST_GRP_NAME, .off = _OUT(mcast_grp_name), .cb = snl_attr_get_string },
- { .type = CTRL_ATTR_MCAST_GRP_ID, .off = _OUT(mcast_grp_id), .cb = snl_attr_get_uint32 },
- };
- #undef _OUT
- SNL_DECLARE_ATTR_PARSER_EXT(_genl_ctrl_mc_parser,
- sizeof(struct snl_genl_ctrl_mcast_group),
- _nla_p_getmc, NULL);
- struct _getfamily_attrs {
- uint16_t family_id;
- char *family_name;
- struct snl_genl_ctrl_mcast_groups mcast_groups;
- };
- #define _IN(_field) offsetof(struct genlmsghdr, _field)
- #define _OUT(_field) offsetof(struct _getfamily_attrs, _field)
- static struct snl_attr_parser _nla_p_getfam[] = {
- { .type = CTRL_ATTR_FAMILY_ID , .off = _OUT(family_id), .cb = snl_attr_get_uint16 },
- { .type = CTRL_ATTR_FAMILY_NAME, .off = _OUT(family_name), .cb = snl_attr_get_string },
- {
- .type = CTRL_ATTR_MCAST_GROUPS,
- .off = _OUT(mcast_groups),
- .cb = snl_attr_get_parray,
- .arg = &_genl_ctrl_mc_parser,
- },
- };
- #undef _IN
- #undef _OUT
- SNL_DECLARE_GENL_PARSER(_genl_ctrl_getfam_parser, _nla_p_getfam);
- static bool
- snl_get_genl_family_info(struct snl_state *ss, const char *family_name,
- struct _getfamily_attrs *attrs)
- {
- struct snl_writer nw;
- struct nlmsghdr *hdr;
- memset(attrs, 0, sizeof(*attrs));
- snl_init_writer(ss, &nw);
- hdr = snl_create_genl_msg_request(&nw, GENL_ID_CTRL, CTRL_CMD_GETFAMILY);
- snl_add_msg_attr_string(&nw, CTRL_ATTR_FAMILY_NAME, family_name);
- if ((hdr = snl_finalize_msg(&nw)) == NULL || !snl_send_message(ss, hdr))
- return (false);
- hdr = snl_read_reply(ss, hdr->nlmsg_seq);
- if (hdr != NULL && hdr->nlmsg_type != NLMSG_ERROR) {
- if (snl_parse_nlmsg(ss, hdr, &_genl_ctrl_getfam_parser, attrs))
- return (true);
- }
- return (false);
- }
- static inline uint16_t
- snl_get_genl_family(struct snl_state *ss, const char *family_name)
- {
- struct _getfamily_attrs attrs = {};
- snl_get_genl_family_info(ss, family_name, &attrs);
- return (attrs.family_id);
- }
- static const struct snl_hdr_parser *snl_all_genl_parsers[] = {
- &_genl_ctrl_getfam_parser, &_genl_ctrl_mc_parser,
- };
- #endif
|