4 * Phonet netlink interface
6 * Copyright (C) 2008 Nokia Corporation.
8 * Contact: Remi Denis-Courmont <remi.denis-courmont@nokia.com>
9 * Original author: 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>
30 #include <net/phonet/pn_dev.h>
32 /* Device address handling */
34 static int fill_addr(struct sk_buff *skb, struct net_device *dev, u8 addr,
35 u32 pid, u32 seq, int event);
37 void phonet_address_notify(int event, struct net_device *dev, u8 addr)
42 skb = nlmsg_new(NLMSG_ALIGN(sizeof(struct ifaddrmsg)) +
43 nla_total_size(1), GFP_KERNEL);
46 err = fill_addr(skb, dev, addr, 0, 0, event);
48 WARN_ON(err == -EMSGSIZE);
52 rtnl_notify(skb, dev_net(dev), 0,
53 RTNLGRP_PHONET_IFADDR, NULL, GFP_KERNEL);
56 rtnl_set_sk_err(dev_net(dev), RTNLGRP_PHONET_IFADDR, err);
59 static const struct nla_policy ifa_phonet_policy[IFA_MAX+1] = {
60 [IFA_LOCAL] = { .type = NLA_U8 },
63 static int addr_doit(struct sk_buff *skb, struct nlmsghdr *nlh, void *attr)
65 struct net *net = sock_net(skb->sk);
66 struct nlattr *tb[IFA_MAX+1];
67 struct net_device *dev;
68 struct ifaddrmsg *ifm;
72 if (!capable(CAP_SYS_ADMIN))
77 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_phonet_policy);
81 ifm = nlmsg_data(nlh);
82 if (tb[IFA_LOCAL] == NULL)
84 pnaddr = nla_get_u8(tb[IFA_LOCAL]);
86 /* Phonet addresses only have 6 high-order bits */
89 dev = __dev_get_by_index(net, ifm->ifa_index);
93 if (nlh->nlmsg_type == RTM_NEWADDR)
94 err = phonet_address_add(dev, pnaddr);
96 err = phonet_address_del(dev, pnaddr);
98 phonet_address_notify(nlh->nlmsg_type, dev, pnaddr);
102 static int fill_addr(struct sk_buff *skb, struct net_device *dev, u8 addr,
103 u32 pid, u32 seq, int event)
105 struct ifaddrmsg *ifm;
106 struct nlmsghdr *nlh;
108 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*ifm), 0);
112 ifm = nlmsg_data(nlh);
113 ifm->ifa_family = AF_PHONET;
114 ifm->ifa_prefixlen = 0;
115 ifm->ifa_flags = IFA_F_PERMANENT;
116 ifm->ifa_scope = RT_SCOPE_LINK;
117 ifm->ifa_index = dev->ifindex;
118 NLA_PUT_U8(skb, IFA_LOCAL, addr);
119 return nlmsg_end(skb, nlh);
122 nlmsg_cancel(skb, nlh);
126 static int getaddr_dumpit(struct sk_buff *skb, struct netlink_callback *cb)
128 struct phonet_device_list *pndevs;
129 struct phonet_device *pnd;
130 int dev_idx = 0, dev_start_idx = cb->args[0];
131 int addr_idx = 0, addr_start_idx = cb->args[1];
133 pndevs = phonet_device_list(sock_net(skb->sk));
135 list_for_each_entry_rcu(pnd, &pndevs->list, list) {
138 if (dev_idx > dev_start_idx)
140 if (dev_idx++ < dev_start_idx)
144 for_each_set_bit(addr, pnd->addrs, 64) {
145 if (addr_idx++ < addr_start_idx)
148 if (fill_addr(skb, pnd->netdev, addr << 2,
149 NETLINK_CB(cb->skb).pid,
150 cb->nlh->nlmsg_seq, RTM_NEWADDR) < 0)
157 cb->args[0] = dev_idx;
158 cb->args[1] = addr_idx;
163 /* Routes handling */
165 static int fill_route(struct sk_buff *skb, struct net_device *dev, u8 dst,
166 u32 pid, u32 seq, int event)
169 struct nlmsghdr *nlh;
171 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*rtm), 0);
175 rtm = nlmsg_data(nlh);
176 rtm->rtm_family = AF_PHONET;
177 rtm->rtm_dst_len = 6;
178 rtm->rtm_src_len = 0;
180 rtm->rtm_table = RT_TABLE_MAIN;
181 rtm->rtm_protocol = RTPROT_STATIC;
182 rtm->rtm_scope = RT_SCOPE_UNIVERSE;
183 rtm->rtm_type = RTN_UNICAST;
185 NLA_PUT_U8(skb, RTA_DST, dst);
186 NLA_PUT_U32(skb, RTA_OIF, dev->ifindex);
187 return nlmsg_end(skb, nlh);
190 nlmsg_cancel(skb, nlh);
194 void rtm_phonet_notify(int event, struct net_device *dev, u8 dst)
199 skb = nlmsg_new(NLMSG_ALIGN(sizeof(struct ifaddrmsg)) +
200 nla_total_size(1) + nla_total_size(4), GFP_KERNEL);
203 err = fill_route(skb, dev, dst, 0, 0, event);
205 WARN_ON(err == -EMSGSIZE);
209 rtnl_notify(skb, dev_net(dev), 0,
210 RTNLGRP_PHONET_ROUTE, NULL, GFP_KERNEL);
213 rtnl_set_sk_err(dev_net(dev), RTNLGRP_PHONET_ROUTE, err);
216 static const struct nla_policy rtm_phonet_policy[RTA_MAX+1] = {
217 [RTA_DST] = { .type = NLA_U8 },
218 [RTA_OIF] = { .type = NLA_U32 },
221 static int route_doit(struct sk_buff *skb, struct nlmsghdr *nlh, void *attr)
223 struct net *net = sock_net(skb->sk);
224 struct nlattr *tb[RTA_MAX+1];
225 struct net_device *dev;
230 if (!capable(CAP_SYS_ADMIN))
235 err = nlmsg_parse(nlh, sizeof(*rtm), tb, RTA_MAX, rtm_phonet_policy);
239 rtm = nlmsg_data(nlh);
240 if (rtm->rtm_table != RT_TABLE_MAIN || rtm->rtm_type != RTN_UNICAST)
242 if (tb[RTA_DST] == NULL || tb[RTA_OIF] == NULL)
244 dst = nla_get_u8(tb[RTA_DST]);
245 if (dst & 3) /* Phonet addresses only have 6 high-order bits */
248 dev = __dev_get_by_index(net, nla_get_u32(tb[RTA_OIF]));
252 if (nlh->nlmsg_type == RTM_NEWROUTE)
253 err = phonet_route_add(dev, dst);
255 err = phonet_route_del(dev, dst);
257 rtm_phonet_notify(nlh->nlmsg_type, dev, dst);
261 static int route_dumpit(struct sk_buff *skb, struct netlink_callback *cb)
263 struct net *net = sock_net(skb->sk);
264 u8 addr, addr_idx = 0, addr_start_idx = cb->args[0];
266 for (addr = 0; addr < 64; addr++) {
267 struct net_device *dev;
269 dev = phonet_route_get(net, addr << 2);
273 if (addr_idx++ < addr_start_idx)
275 if (fill_route(skb, dev, addr << 2, NETLINK_CB(cb->skb).pid,
276 cb->nlh->nlmsg_seq, RTM_NEWROUTE))
281 cb->args[0] = addr_idx;
287 int __init phonet_netlink_register(void)
289 int err = __rtnl_register(PF_PHONET, RTM_NEWADDR, addr_doit, NULL);
293 /* Further __rtnl_register() cannot fail */
294 __rtnl_register(PF_PHONET, RTM_DELADDR, addr_doit, NULL);
295 __rtnl_register(PF_PHONET, RTM_GETADDR, NULL, getaddr_dumpit);
296 __rtnl_register(PF_PHONET, RTM_NEWROUTE, route_doit, NULL);
297 __rtnl_register(PF_PHONET, RTM_DELROUTE, route_doit, NULL);
298 __rtnl_register(PF_PHONET, RTM_GETROUTE, NULL, route_dumpit);