+++ /dev/null
-/*
- * lxc: linux Container library
- *
- * (C) Copyright IBM Corp. 2007, 2008
- *
- * Authors:
- * Daniel Lezcano <daniel.lezcano at free.fr>
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library 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
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- */
-#include <string.h>
-#include <stdio.h>
-#include <sys/socket.h>
-#include <stdlib.h>
-#include <errno.h>
-#include <unistd.h>
-#include <linux/genetlink.h>
-#include <linux/rtnetlink.h>
-
-#include "nl.h"
-#include "genl.h"
-
-static int genetlink_resolve_family(const char *family)
-{
- struct nl_handler handler;
- struct nlattr *attr;
- struct genlmsg *request, *reply;
- struct genlmsghdr *genlmsghdr;
-
- int len, ret;
-
- request = genlmsg_alloc(GENLMSG_GOOD_SIZE);
- if (!request)
- return -ENOMEM;
-
- reply = genlmsg_alloc(GENLMSG_GOOD_SIZE);
- if (!reply) {
- genlmsg_free(request);
- return -ENOMEM;
- }
-
- request->nlmsghdr.nlmsg_len = NLMSG_LENGTH(GENL_HDRLEN);
- request->nlmsghdr.nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
- request->nlmsghdr.nlmsg_type = GENL_ID_CTRL;
-
- genlmsghdr = NLMSG_DATA(&request->nlmsghdr);
- genlmsghdr->cmd = CTRL_CMD_GETFAMILY;
-
- ret = netlink_open(&handler, NETLINK_GENERIC);
- if (ret)
- goto out;
-
- ret = nla_put_string((struct nlmsg *)&request->nlmsghdr,
- CTRL_ATTR_FAMILY_NAME, family);
- if (ret)
- goto out_close;
-
- ret = netlink_transaction(&handler, (struct nlmsg *)&request->nlmsghdr,
- (struct nlmsg *)&reply->nlmsghdr);
- if (ret < 0)
- goto out_close;
-
- genlmsghdr = NLMSG_DATA(&reply->nlmsghdr);
- len = reply->nlmsghdr.nlmsg_len;
-
- ret = -ENOMSG;
- if (reply->nlmsghdr.nlmsg_type != GENL_ID_CTRL)
- goto out_close;
-
- if (genlmsghdr->cmd != CTRL_CMD_NEWFAMILY)
- goto out_close;
-
- ret = -EMSGSIZE;
- len -= NLMSG_LENGTH(GENL_HDRLEN);
- if (len < 0)
- goto out_close;
-
- attr = (struct nlattr *)GENLMSG_DATA(reply);
- attr = (struct nlattr *)((char *)attr + NLA_ALIGN(attr->nla_len));
-
- ret = -ENOMSG;
- if (attr->nla_type != CTRL_ATTR_FAMILY_ID)
- goto out_close;
-
- ret = *(__u16 *) NLA_DATA(attr);
-out_close:
- netlink_close(&handler);
-out:
- genlmsg_free(request);
- genlmsg_free(reply);
- return ret;
-}
-
-extern int genetlink_open(struct genl_handler *handler, const char *family)
-{
- int ret;
- handler->family = genetlink_resolve_family(family);
- if (handler->family < 0)
- return handler->family;
-
- ret = netlink_open(&handler->nlh, NETLINK_GENERIC);
-
- return ret;
-}
-
-extern int genetlink_close(struct genl_handler *handler)
-{
- return netlink_close(&handler->nlh);
-}
-
-extern int genetlink_rcv(struct genl_handler *handler, struct genlmsg *genlmsg)
-{
- return netlink_rcv(&handler->nlh, (struct nlmsg *)&genlmsg->nlmsghdr);
-}
-
-extern int genetlink_send(struct genl_handler *handler, struct genlmsg *genlmsg)
-{
-
- return netlink_send(&handler->nlh, (struct nlmsg *)&genlmsg->nlmsghdr);
-}
-
-extern int genetlink_transaction(struct genl_handler *handler,
- struct genlmsg *request, struct genlmsg *answer)
-{
- return netlink_transaction(&handler->nlh, (struct nlmsg *)&request->nlmsghdr,
- (struct nlmsg *)&answer->nlmsghdr);
-}
-
-extern struct genlmsg *genlmsg_alloc(size_t size)
-{
- size_t len = NLMSG_LENGTH(GENL_HDRLEN) + size;
- return (struct genlmsg *)nlmsg_alloc(len);
-}
-
-extern void genlmsg_free(struct genlmsg *genlmsg)
-{
- free(genlmsg);
-}
+++ /dev/null
-/*
- * lxc: linux Container library
- *
- * (C) Copyright IBM Corp. 2007, 2008
- *
- * Authors:
- * Daniel Lezcano <daniel.lezcano at free.fr>
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library 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
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- */
-#ifndef __LXC_GENL_H
-#define __LXC_GENL_H
-
-/*
- * Use this as a good size to allocate generic netlink messages
- */
-#define GENLMSG_GOOD_SIZE NLMSG_GOOD_SIZE
-#define GENLMSG_DATA(glh) ((void *)(NLMSG_DATA(glh) + GENL_HDRLEN))
-
-/*
- * struct genl_handler : the structure which store the netlink handler
- * and the family number resulting of the auto-generating id family
- * for the generic netlink protocol
- *
- * @nlh: the netlink socket handler
- * @family: the generic netlink family assigned number
- */
-struct genl_handler
-{
- struct nl_handler nlh;
- int family;
-};
-
-/*
- * struct genlmsg : the struct containing the generic netlink message
- * format
- *
- * @nlmsghdr: a netlink message header
- * @genlmsghdr: a generic netlink message header pointer
- *
- */
-/* __attribute__ ((aligned(4))); */
-struct genlmsg {
- struct nlmsghdr nlmsghdr;
- struct genlmsghdr genlmsghdr;
-};
-
-static inline int genetlink_len(const struct genlmsg *genlmsg)
-{
- return ((genlmsg->nlmsghdr.nlmsg_len) - GENL_HDRLEN - NLMSG_HDRLEN);
-}
-
-/*
- * genetlink_open : resolve family number id and open a generic netlink socket
- *
- * @handler: a struct genl_handler pointer
- * @family: the family name of the generic netlink protocol
- *
- * Returns 0 on success, < 0 otherwise
- */
-int genetlink_open(struct genl_handler *handler, const char *family);
-
-/*
- * genetlink_close : close a generic netlink socket
- *
- * @handler: the handler of the socket to be closed
- *
- * Returns 0 on success, < 0 otherwise
- */
-int genetlink_close(struct genl_handler *handler);
-
-/*
- * genetlink_rcv : receive a generic netlink socket, it is up
- * to the caller to manage the allocation of the generic netlink message
- *
- * @handler: the handler of the generic netlink socket
- * @genlmsg: the pointer to a generic netlink message pre-allocated
- *
- * Returns 0 on success, < 0 otherwise
- */
-int genetlink_rcv(struct genl_handler *handler, struct genlmsg *genlmsg);
-
-/*
- * genetlink_send : send a generic netlink socket, it is up
- * to the caller to manage the allocation of the generic netlink message
- *
- * @handler: the handler of the generic netlink socket
- * @genlmsg: the pointer to a generic netlink message pre-allocated
- *
- * Returns 0 on success, < 0 otherwise
- */
-int genetlink_send(struct genl_handler *handler, struct genlmsg *genlmsg);
-
-struct genlmsg *genlmsg_alloc(size_t size);
-
-void genlmsg_free(struct genlmsg *genlmsg);
-
-/*
- * genetlink_transaction : send and receive a generic netlink message in one shot
- *
- * @handler: the handler of the generic netlink socket
- * @request: a generic netlink message containing the request to be sent
- * @answer: a pre-allocated generic netlink message to receive the response
- *
- * Returns 0 on success, < 0 otherwise
- */
-int genetlink_transaction(struct genl_handler *handler,
- struct genlmsg *request, struct genlmsg *answer);
-#endif
projects / mirror_lxc.git / commitdiff