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>
22 #include <linux/if_tun.h>
23 #include <sys/ioctl.h>
24 #include <linux/virtio_net.h>
25 #include <linux/vhost.h>
26 #include <sys/eventfd.h>
28 #include <linux/netlink.h>
29 #include <linux/rtnetlink.h>
31 #include <vlib/vlib.h>
32 #include <vlib/unix/unix.h>
40 vnet_netlink_msg_init (vnet_netlink_msg_t * m, u16 type, u16 flags,
41 void *msg_data, int msg_len)
45 int len = NLMSG_LENGTH (msg_len);
46 memset (m, 0, sizeof (vnet_netlink_msg_t));
47 vec_add2 (m->data, p, len);
48 ASSERT (m->data == p);
50 nh = (struct nlmsghdr *) p;
51 nh->nlmsg_flags = flags;
52 nh->nlmsg_type = type;
53 clib_memcpy (m->data + sizeof (struct nlmsghdr), msg_data, msg_len);
57 vnet_netlink_msg_add_rtattr (vnet_netlink_msg_t * m, u16 rta_type,
58 void *rta_data, int rta_data_len)
63 vec_add2 (m->data, p, RTA_LENGTH (rta_data_len));
64 rta = (struct rtattr *) p;
65 rta->rta_type = rta_type;
66 rta->rta_len = RTA_LENGTH (rta_data_len);
67 clib_memcpy (RTA_DATA (rta), rta_data, rta_data_len);
71 vnet_netlink_msg_send (vnet_netlink_msg_t * m)
73 clib_error_t *err = 0;
74 struct sockaddr_nl ra = { 0 };
76 struct nlmsghdr *nh = (struct nlmsghdr *) m->data;
77 nh->nlmsg_len = vec_len (m->data);
79 if ((sock = socket (AF_NETLINK, SOCK_RAW, NETLINK_ROUTE)) == -1)
80 return clib_error_return_unix (0, "socket(AF_NETLINK)");
82 ra.nl_family = AF_NETLINK;
83 ra.nl_pid = getpid ();
85 if ((bind (sock, (struct sockaddr *) &ra, sizeof (ra))) == -1)
87 err = clib_error_return_unix (0, "bind");
91 if ((send (sock, m->data, vec_len (m->data), 0)) == -1)
92 err = clib_error_return_unix (0, "send");
101 vnet_netlink_set_if_namespace (int ifindex, char *net_ns)
103 vnet_netlink_msg_t m;
104 struct ifinfomsg ifmsg = { 0 };
111 if (strncmp (net_ns, "pid:", 4) == 0)
113 data = atoi (net_ns + 4);
114 type = IFLA_NET_NS_PID;
118 if (net_ns[0] == '/')
119 s = format (0, "%s%c", net_ns, 0);
121 s = format (0, "/var/run/netns/%s%c", net_ns, 0);
123 data = open ((char *) s, O_RDONLY);
124 type = IFLA_NET_NS_FD;
127 return clib_error_return (0, "namespace '%s' doesn't exist", net_ns);
130 ifmsg.ifi_family = AF_UNSPEC;
131 ifmsg.ifi_index = ifindex;
132 ifmsg.ifi_change = 0xffffffff;
133 vnet_netlink_msg_init (&m, RTM_SETLINK, NLM_F_REQUEST,
134 &ifmsg, sizeof (struct ifinfomsg));
136 vnet_netlink_msg_add_rtattr (&m, type, &data, sizeof (int));
137 err = vnet_netlink_msg_send (&m);
139 if (type == IFLA_NET_NS_FD)
145 vnet_netlink_set_if_master (int ifindex, int master_ifindex)
147 vnet_netlink_msg_t m;
148 struct ifinfomsg ifmsg = { 0 };
150 ifmsg.ifi_family = AF_UNSPEC;
151 ifmsg.ifi_index = ifindex;
152 ifmsg.ifi_change = 0xffffffff;
153 vnet_netlink_msg_init (&m, RTM_SETLINK, NLM_F_REQUEST,
154 &ifmsg, sizeof (struct ifinfomsg));
155 vnet_netlink_msg_add_rtattr (&m, IFLA_MASTER, &master_ifindex,
157 return vnet_netlink_msg_send (&m);
161 vnet_netlink_set_if_mtu (int ifindex, int mtu)
163 vnet_netlink_msg_t m;
164 struct ifinfomsg ifmsg = { 0 };
166 ifmsg.ifi_family = AF_UNSPEC;
167 ifmsg.ifi_index = ifindex;
168 ifmsg.ifi_change = 0xffffffff;
169 vnet_netlink_msg_init (&m, RTM_SETLINK, NLM_F_REQUEST,
170 &ifmsg, sizeof (struct ifinfomsg));
171 vnet_netlink_msg_add_rtattr (&m, IFLA_MTU, &mtu, sizeof (int));
172 return vnet_netlink_msg_send (&m);
176 vnet_netlink_add_ip4_addr (int ifindex, void *addr, int pfx_len)
178 vnet_netlink_msg_t m;
179 struct ifaddrmsg ifa = { 0 };
181 ifa.ifa_family = AF_INET;
182 ifa.ifa_prefixlen = pfx_len;
183 ifa.ifa_index = ifindex;
185 vnet_netlink_msg_init (&m, RTM_NEWADDR,
186 NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL,
187 &ifa, sizeof (struct ifaddrmsg));
189 vnet_netlink_msg_add_rtattr (&m, IFA_LOCAL, addr, 4);
190 vnet_netlink_msg_add_rtattr (&m, IFA_ADDRESS, addr, 4);
191 return vnet_netlink_msg_send (&m);
195 vnet_netlink_add_ip6_addr (int ifindex, void *addr, int pfx_len)
197 vnet_netlink_msg_t m;
198 struct ifaddrmsg ifa = { 0 };
200 ifa.ifa_family = AF_INET6;
201 ifa.ifa_prefixlen = pfx_len;
202 ifa.ifa_index = ifindex;
204 vnet_netlink_msg_init (&m, RTM_NEWADDR,
205 NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL,
206 &ifa, sizeof (struct ifaddrmsg));
208 vnet_netlink_msg_add_rtattr (&m, IFA_LOCAL, addr, 16);
209 vnet_netlink_msg_add_rtattr (&m, IFA_ADDRESS, addr, 16);
210 return vnet_netlink_msg_send (&m);
214 * fd.io coding-style-patch-verification: ON
217 * eval: (c-set-style "gnu")