2 *------------------------------------------------------------------
3 * Copyright (c) 2017 Cisco and/or its affiliates.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at:
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 *------------------------------------------------------------------
18 #include <sys/types.h>
23 #include <linux/netlink.h>
24 #include <linux/rtnetlink.h>
26 #include <vlib/vlib.h>
27 #include <vlib/unix/unix.h>
28 #include <vnet/devices/netlink.h>
36 vnet_netlink_msg_init (vnet_netlink_msg_t * m, u16 type, u16 flags,
37 void *msg_data, int msg_len)
41 clib_memset (m, 0, sizeof (vnet_netlink_msg_t));
42 vec_add2 (m->data, p, NLMSG_SPACE (msg_len));
43 ASSERT (m->data == p);
45 nh = (struct nlmsghdr *) p;
46 nh->nlmsg_flags = flags | NLM_F_ACK;
47 nh->nlmsg_type = type;
48 clib_memcpy (m->data + sizeof (struct nlmsghdr), msg_data, msg_len);
52 vnet_netlink_msg_add_rtattr (vnet_netlink_msg_t * m, u16 rta_type,
53 void *rta_data, int rta_data_len)
58 vec_add2 (m->data, p, RTA_SPACE (rta_data_len));
59 rta = (struct rtattr *) p;
60 rta->rta_type = rta_type;
61 rta->rta_len = RTA_LENGTH (rta_data_len);
62 clib_memcpy (RTA_DATA (rta), rta_data, rta_data_len);
66 vnet_netlink_msg_send (vnet_netlink_msg_t * m)
68 clib_error_t *err = 0;
69 struct sockaddr_nl ra = { 0 };
71 struct nlmsghdr *nh = (struct nlmsghdr *) m->data;
72 nh->nlmsg_len = vec_len (m->data);
75 if ((sock = socket (AF_NETLINK, SOCK_RAW, NETLINK_ROUTE)) == -1)
76 return clib_error_return_unix (0, "socket(AF_NETLINK)");
78 ra.nl_family = AF_NETLINK;
81 if ((bind (sock, (struct sockaddr *) &ra, sizeof (ra))) == -1)
83 err = clib_error_return_unix (0, "bind");
87 if ((send (sock, m->data, vec_len (m->data), 0)) == -1)
88 err = clib_error_return_unix (0, "send");
90 if ((len = recv (sock, buf, sizeof (buf), 0)) == -1)
91 err = clib_error_return_unix (0, "recv");
93 for (nh = (struct nlmsghdr *) buf; NLMSG_OK (nh, len);
94 nh = NLMSG_NEXT (nh, len))
96 if (nh->nlmsg_type == NLMSG_DONE)
99 if (nh->nlmsg_type == NLMSG_ERROR)
101 struct nlmsgerr *e = (struct nlmsgerr *) NLMSG_DATA (nh);
103 err = clib_error_return (0, "netlink error %d", e->error);
115 vnet_netlink_set_link_name (int ifindex, char *new_ifname)
117 vnet_netlink_msg_t m;
118 struct ifinfomsg ifmsg = { 0 };
119 clib_error_t *err = 0;
121 ifmsg.ifi_index = ifindex;
122 vnet_netlink_msg_init (&m, RTM_SETLINK, NLM_F_REQUEST,
123 &ifmsg, sizeof (struct ifinfomsg));
125 vnet_netlink_msg_add_rtattr (&m, IFLA_IFNAME, new_ifname,
126 strlen (new_ifname) + 1);
128 err = vnet_netlink_msg_send (&m);
130 err = clib_error_return (0, "set link name %U", format_clib_error, err);
135 vnet_netlink_set_link_netns (int ifindex, int netns_fd, char *new_ifname)
137 vnet_netlink_msg_t m;
138 struct ifinfomsg ifmsg = { 0 };
139 clib_error_t *err = 0;
141 ifmsg.ifi_index = ifindex;
142 vnet_netlink_msg_init (&m, RTM_SETLINK, NLM_F_REQUEST,
143 &ifmsg, sizeof (struct ifinfomsg));
145 vnet_netlink_msg_add_rtattr (&m, IFLA_NET_NS_FD, &netns_fd, sizeof (int));
147 vnet_netlink_msg_add_rtattr (&m, IFLA_IFNAME, new_ifname,
148 strlen (new_ifname) + 1);
150 err = vnet_netlink_msg_send (&m);
152 err = clib_error_return (0, "set link netns %U", format_clib_error, err);
157 vnet_netlink_set_link_master (int ifindex, char *master_ifname)
159 vnet_netlink_msg_t m;
160 struct ifinfomsg ifmsg = { 0 };
162 clib_error_t *err = 0;
164 ifmsg.ifi_index = ifindex;
166 if ((i = if_nametoindex (master_ifname)) == 0)
167 clib_error_return_unix (0, "unknown master interface '%s'",
170 vnet_netlink_msg_init (&m, RTM_SETLINK, NLM_F_REQUEST,
171 &ifmsg, sizeof (struct ifinfomsg));
172 vnet_netlink_msg_add_rtattr (&m, IFLA_MASTER, &i, sizeof (int));
173 err = vnet_netlink_msg_send (&m);
175 err = clib_error_return (0, "set link master %U", format_clib_error, err);
180 vnet_netlink_set_link_addr (int ifindex, u8 * mac)
182 vnet_netlink_msg_t m;
183 struct ifinfomsg ifmsg = { 0 };
184 clib_error_t *err = 0;
186 ifmsg.ifi_index = ifindex;
188 vnet_netlink_msg_init (&m, RTM_SETLINK, NLM_F_REQUEST,
189 &ifmsg, sizeof (struct ifinfomsg));
190 vnet_netlink_msg_add_rtattr (&m, IFLA_ADDRESS, mac, 6);
191 err = vnet_netlink_msg_send (&m);
193 err = clib_error_return (0, "set link addr %U", format_clib_error, err);
198 vnet_netlink_set_link_state (int ifindex, int up)
200 vnet_netlink_msg_t m;
201 struct ifinfomsg ifmsg = { 0 };
202 clib_error_t *err = 0;
204 ifmsg.ifi_flags = IFF_UP;
205 ifmsg.ifi_change = IFF_UP;
206 ifmsg.ifi_index = ifindex;
208 vnet_netlink_msg_init (&m, RTM_SETLINK, NLM_F_REQUEST,
209 &ifmsg, sizeof (struct ifinfomsg));
210 err = vnet_netlink_msg_send (&m);
212 err = clib_error_return (0, "set link state %U", format_clib_error, err);
217 vnet_netlink_set_link_mtu (int ifindex, int mtu)
219 vnet_netlink_msg_t m;
220 struct ifinfomsg ifmsg = { 0 };
221 clib_error_t *err = 0;
223 ifmsg.ifi_index = ifindex;
225 vnet_netlink_msg_init (&m, RTM_SETLINK, NLM_F_REQUEST,
226 &ifmsg, sizeof (struct ifinfomsg));
227 vnet_netlink_msg_add_rtattr (&m, IFLA_MTU, &mtu, sizeof (int));
228 err = vnet_netlink_msg_send (&m);
230 err = clib_error_return (0, "set link mtu %U", format_clib_error, err);
235 vnet_netlink_add_ip4_addr (int ifindex, void *addr, int pfx_len)
237 vnet_netlink_msg_t m;
238 struct ifaddrmsg ifa = { 0 };
239 clib_error_t *err = 0;
241 ifa.ifa_family = AF_INET;
242 ifa.ifa_prefixlen = pfx_len;
243 ifa.ifa_index = ifindex;
245 vnet_netlink_msg_init (&m, RTM_NEWADDR,
246 NLM_F_REQUEST | NLM_F_CREATE | NLM_F_REPLACE,
247 &ifa, sizeof (struct ifaddrmsg));
249 vnet_netlink_msg_add_rtattr (&m, IFA_LOCAL, addr, 4);
250 vnet_netlink_msg_add_rtattr (&m, IFA_ADDRESS, addr, 4);
251 err = vnet_netlink_msg_send (&m);
253 err = clib_error_return (0, "add ip4 addr %U", format_clib_error, err);
258 vnet_netlink_add_ip6_addr (int ifindex, void *addr, int pfx_len)
260 vnet_netlink_msg_t m;
261 struct ifaddrmsg ifa = { 0 };
262 clib_error_t *err = 0;
264 ifa.ifa_family = AF_INET6;
265 ifa.ifa_prefixlen = pfx_len;
266 ifa.ifa_index = ifindex;
268 vnet_netlink_msg_init (&m, RTM_NEWADDR,
269 NLM_F_REQUEST | NLM_F_CREATE | NLM_F_REPLACE,
270 &ifa, sizeof (struct ifaddrmsg));
272 vnet_netlink_msg_add_rtattr (&m, IFA_LOCAL, addr, 16);
273 vnet_netlink_msg_add_rtattr (&m, IFA_ADDRESS, addr, 16);
274 err = vnet_netlink_msg_send (&m);
276 err = clib_error_return (0, "add ip6 addr %U", format_clib_error, err);
281 vnet_netlink_add_ip4_route (void *dst, u8 dst_len, void *gw)
283 vnet_netlink_msg_t m;
284 struct rtmsg rtm = { 0 };
286 clib_error_t *err = 0;
288 rtm.rtm_family = AF_INET;
289 rtm.rtm_table = RT_TABLE_MAIN;
290 rtm.rtm_type = RTN_UNICAST;
291 rtm.rtm_dst_len = dst_len;
293 vnet_netlink_msg_init (&m, RTM_NEWROUTE,
294 NLM_F_REQUEST | NLM_F_CREATE | NLM_F_REPLACE,
295 &rtm, sizeof (struct rtmsg));
297 vnet_netlink_msg_add_rtattr (&m, RTA_GATEWAY, gw, 4);
298 vnet_netlink_msg_add_rtattr (&m, RTA_DST, dst ? dst : dflt, 4);
299 err = vnet_netlink_msg_send (&m);
301 err = clib_error_return (0, "add ip4 route %U", format_clib_error, err);
306 vnet_netlink_add_ip6_route (void *dst, u8 dst_len, void *gw)
308 vnet_netlink_msg_t m;
309 struct rtmsg rtm = { 0 };
311 clib_error_t *err = 0;
313 rtm.rtm_family = AF_INET6;
314 rtm.rtm_table = RT_TABLE_MAIN;
315 rtm.rtm_type = RTN_UNICAST;
316 rtm.rtm_dst_len = dst_len;
318 vnet_netlink_msg_init (&m, RTM_NEWROUTE,
319 NLM_F_REQUEST | NLM_F_CREATE | NLM_F_REPLACE,
320 &rtm, sizeof (struct rtmsg));
322 vnet_netlink_msg_add_rtattr (&m, RTA_GATEWAY, gw, 16);
323 vnet_netlink_msg_add_rtattr (&m, RTA_DST, dst ? dst : dflt, 16);
324 err = vnet_netlink_msg_send (&m);
326 err = clib_error_return (0, "add ip6 route %U", format_clib_error, err);
331 * fd.io coding-style-patch-verification: ON
334 * eval: (c-set-style "gnu")