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* lxc: linux Container library
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* (C) Copyright IBM Corp. 2007, 2008
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* Daniel Lezcano <dlezcano at fr.ibm.com>
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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* Use this as a good size to allocate generic netlink messages
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#define GENLMSG_GOOD_SIZE NLMSG_GOOD_SIZE
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#define GENLMSG_DATA(glh) ((void *)(NLMSG_DATA(glh) + GENL_HDRLEN))
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* struct genl_handler : the structure which store the netlink handler
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* and the family number resulting of the auto-generating id family
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* for the generic netlink protocol
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* @nlh: the netlink socket handler
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* @family: the generic netlink family assigned number
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struct nl_handler nlh;
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* struct genlmsg : the struct containing the generic netlink message
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* @nlmsghdr: a netlink message header
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* @genlmsghdr: a generic netlink message header pointer
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/* __attribute__ ((aligned(4))); */
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struct nlmsghdr nlmsghdr;
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struct genlmsghdr genlmsghdr;
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static inline int genetlink_len(const struct genlmsg *genlmsg)
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return ((genlmsg->nlmsghdr.nlmsg_len) - GENL_HDRLEN - NLMSG_HDRLEN);
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* genetlink_open : resolve family number id and open a generic netlink socket
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* @handler: a struct genl_handler pointer
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* @family: the family name of the generic netlink protocol
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* Returns 0 on success, < 0 otherwise
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int genetlink_open(struct genl_handler *handler, const char *family);
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* genetlink_close : close a generic netlink socket
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* @handler: the handler of the socket to be closed
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* Returns 0 on success, < 0 otherwise
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int genetlink_close(struct genl_handler *handler);
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* genetlink_rcv : receive a generic netlink socket, it is up
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* to the caller to manage the allocation of the generic netlink message
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* @handler: the handler of the generic netlink socket
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* @genlmsg: the pointer to a generic netlink message pre-allocated
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* Returns 0 on success, < 0 otherwise
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int genetlink_rcv(struct genl_handler *handler, struct genlmsg *genlmsg);
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* genetlink_send : send a generic netlink socket, it is up
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* to the caller to manage the allocation of the generic netlink message
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* @handler: the handler of the generic netlink socket
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* @genlmsg: the pointer to a generic netlink message pre-allocated
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* Returns 0 on success, < 0 otherwise
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int genetlink_send(struct genl_handler *handler, struct genlmsg *genlmsg);
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struct genlmsg *genlmsg_alloc(size_t size);
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void genlmsg_free(struct genlmsg *genlmsg);
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* genetlink_transaction : send and receive a generic netlink message in one shot
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* @handler: the handler of the generic netlink socket
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* @request: a generic netlink message containing the request to be sent
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* @answer: a pre-allocated generic netlink message to receive the response
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* Returns 0 on success, < 0 otherwise
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int genetlink_transaction(struct genl_handler *handler,
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struct genlmsg *request, struct genlmsg *answer);
added
removed
src/lxc/genl.h
