4 * Phonet netlink interface
6 * Copyright (C) 2008 Nokia Corporation.
8 * Authors: Sakari Ailus <sakari.ailus@nokia.com>
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License
13 * version 2 as published by the Free Software Foundation.
15 * This program is distributed in the hope that it will be useful, but
16 * WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
26 #include <linux/kernel.h>
27 #include <linux/netlink.h>
28 #include <linux/phonet.h>
29 #include <linux/slab.h>
31 #include <net/phonet/pn_dev.h>
33 /* Device address handling */
35 static int fill_addr(struct sk_buff *skb, struct net_device *dev, u8 addr,
36 u32 portid, u32 seq, int event);
38 void phonet_address_notify(int event, struct net_device *dev, u8 addr)
43 skb = nlmsg_new(NLMSG_ALIGN(sizeof(struct ifaddrmsg)) +
44 nla_total_size(1), GFP_KERNEL);
47 err = fill_addr(skb, dev, addr, 0, 0, event);
49 WARN_ON(err == -EMSGSIZE);
53 rtnl_notify(skb, dev_net(dev), 0,
54 RTNLGRP_PHONET_IFADDR, NULL, GFP_KERNEL);
57 rtnl_set_sk_err(dev_net(dev), RTNLGRP_PHONET_IFADDR, err);
60 static const struct nla_policy ifa_phonet_policy[IFA_MAX+1] = {
61 [IFA_LOCAL] = { .type = NLA_U8 },
64 static int addr_doit(struct sk_buff *skb, struct nlmsghdr *nlh)
66 struct net *net = sock_net(skb->sk);
67 struct nlattr *tb[IFA_MAX+1];
68 struct net_device *dev;
69 struct ifaddrmsg *ifm;
73 if (!netlink_capable(skb, CAP_NET_ADMIN))
76 if (!netlink_capable(skb, CAP_SYS_ADMIN))
81 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_phonet_policy,
86 ifm = nlmsg_data(nlh);
87 if (tb[IFA_LOCAL] == NULL)
89 pnaddr = nla_get_u8(tb[IFA_LOCAL]);
91 /* Phonet addresses only have 6 high-order bits */
94 dev = __dev_get_by_index(net, ifm->ifa_index);
98 if (nlh->nlmsg_type == RTM_NEWADDR)
99 err = phonet_address_add(dev, pnaddr);
101 err = phonet_address_del(dev, pnaddr);
103 phonet_address_notify(nlh->nlmsg_type, dev, pnaddr);
107 static int fill_addr(struct sk_buff *skb, struct net_device *dev, u8 addr,
108 u32 portid, u32 seq, int event)
110 struct ifaddrmsg *ifm;
111 struct nlmsghdr *nlh;
113 nlh = nlmsg_put(skb, portid, seq, event, sizeof(*ifm), 0);
117 ifm = nlmsg_data(nlh);
118 ifm->ifa_family = AF_PHONET;
119 ifm->ifa_prefixlen = 0;
120 ifm->ifa_flags = IFA_F_PERMANENT;
121 ifm->ifa_scope = RT_SCOPE_LINK;
122 ifm->ifa_index = dev->ifindex;
123 if (nla_put_u8(skb, IFA_LOCAL, addr))
124 goto nla_put_failure;
129 nlmsg_cancel(skb, nlh);
133 static int getaddr_dumpit(struct sk_buff *skb, struct netlink_callback *cb)
135 struct phonet_device_list *pndevs;
136 struct phonet_device *pnd;
137 int dev_idx = 0, dev_start_idx = cb->args[0];
138 int addr_idx = 0, addr_start_idx = cb->args[1];
140 pndevs = phonet_device_list(sock_net(skb->sk));
142 list_for_each_entry_rcu(pnd, &pndevs->list, list) {
145 if (dev_idx > dev_start_idx)
147 if (dev_idx++ < dev_start_idx)
151 for_each_set_bit(addr, pnd->addrs, 64) {
152 if (addr_idx++ < addr_start_idx)
155 if (fill_addr(skb, pnd->netdev, addr << 2,
156 NETLINK_CB(cb->skb).portid,
157 cb->nlh->nlmsg_seq, RTM_NEWADDR) < 0)
164 cb->args[0] = dev_idx;
165 cb->args[1] = addr_idx;
170 /* Routes handling */
172 static int fill_route(struct sk_buff *skb, struct net_device *dev, u8 dst,
173 u32 portid, u32 seq, int event)
176 struct nlmsghdr *nlh;
178 nlh = nlmsg_put(skb, portid, seq, event, sizeof(*rtm), 0);
182 rtm = nlmsg_data(nlh);
183 rtm->rtm_family = AF_PHONET;
184 rtm->rtm_dst_len = 6;
185 rtm->rtm_src_len = 0;
187 rtm->rtm_table = RT_TABLE_MAIN;
188 rtm->rtm_protocol = RTPROT_STATIC;
189 rtm->rtm_scope = RT_SCOPE_UNIVERSE;
190 rtm->rtm_type = RTN_UNICAST;
192 if (nla_put_u8(skb, RTA_DST, dst) ||
193 nla_put_u32(skb, RTA_OIF, dev->ifindex))
194 goto nla_put_failure;
199 nlmsg_cancel(skb, nlh);
203 void rtm_phonet_notify(int event, struct net_device *dev, u8 dst)
208 skb = nlmsg_new(NLMSG_ALIGN(sizeof(struct ifaddrmsg)) +
209 nla_total_size(1) + nla_total_size(4), GFP_KERNEL);
212 err = fill_route(skb, dev, dst, 0, 0, event);
214 WARN_ON(err == -EMSGSIZE);
218 rtnl_notify(skb, dev_net(dev), 0,
219 RTNLGRP_PHONET_ROUTE, NULL, GFP_KERNEL);
222 rtnl_set_sk_err(dev_net(dev), RTNLGRP_PHONET_ROUTE, err);
225 static const struct nla_policy rtm_phonet_policy[RTA_MAX+1] = {
226 [RTA_DST] = { .type = NLA_U8 },
227 [RTA_OIF] = { .type = NLA_U32 },
230 static int route_doit(struct sk_buff *skb, struct nlmsghdr *nlh)
232 struct net *net = sock_net(skb->sk);
233 struct nlattr *tb[RTA_MAX+1];
234 struct net_device *dev;
239 if (!netlink_capable(skb, CAP_NET_ADMIN))
242 if (!netlink_capable(skb, CAP_SYS_ADMIN))
247 err = nlmsg_parse(nlh, sizeof(*rtm), tb, RTA_MAX, rtm_phonet_policy,
252 rtm = nlmsg_data(nlh);
253 if (rtm->rtm_table != RT_TABLE_MAIN || rtm->rtm_type != RTN_UNICAST)
255 if (tb[RTA_DST] == NULL || tb[RTA_OIF] == NULL)
257 dst = nla_get_u8(tb[RTA_DST]);
258 if (dst & 3) /* Phonet addresses only have 6 high-order bits */
261 dev = __dev_get_by_index(net, nla_get_u32(tb[RTA_OIF]));
265 if (nlh->nlmsg_type == RTM_NEWROUTE)
266 err = phonet_route_add(dev, dst);
268 err = phonet_route_del(dev, dst);
270 rtm_phonet_notify(nlh->nlmsg_type, dev, dst);
274 static int route_dumpit(struct sk_buff *skb, struct netlink_callback *cb)
276 struct net *net = sock_net(skb->sk);
280 for (addr = cb->args[0]; addr < 64; addr++) {
281 struct net_device *dev = phonet_route_get_rcu(net, addr << 2);
286 if (fill_route(skb, dev, addr << 2, NETLINK_CB(cb->skb).portid,
287 cb->nlh->nlmsg_seq, RTM_NEWROUTE) < 0)
298 int __init phonet_netlink_register(void)
300 int err = __rtnl_register(PF_PHONET, RTM_NEWADDR, addr_doit,
305 /* Further __rtnl_register() cannot fail */
306 __rtnl_register(PF_PHONET, RTM_DELADDR, addr_doit, NULL, NULL);
307 __rtnl_register(PF_PHONET, RTM_GETADDR, NULL, getaddr_dumpit, NULL);
308 __rtnl_register(PF_PHONET, RTM_NEWROUTE, route_doit, NULL, NULL);
309 __rtnl_register(PF_PHONET, RTM_DELROUTE, route_doit, NULL, NULL);
310 __rtnl_register(PF_PHONET, RTM_GETROUTE, NULL, route_dumpit, NULL);