X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=src%2Fvnet%2Fdevices%2Fnetlink.c;h=e3e33a3b2d0994bf7abd2818b51e790031819909;hb=b49bc1ae6404f0dff373578786a9fd95d961e5cd;hp=b05daf2674a1908acbddd34f7c4102b9b3000774;hpb=f953dfc8e01426ce93588e9013c112e48a9a8463;p=vpp.git

diff --git a/src/vnet/devices/netlink.c b/src/vnet/devices/netlink.c
index b05daf2674a..e3e33a3b2d0 100644
--- a/src/vnet/devices/netlink.c
+++ b/src/vnet/devices/netlink.c
@@ -19,90 +19,311 @@
 #include <sys/stat.h>
 #include <fcntl.h>
 #include <net/if.h>
-#include <linux/if_tun.h>
-#include <sys/ioctl.h>
-#include <linux/virtio_net.h>
-#include <linux/vhost.h>
-#include <sys/eventfd.h>
 
 #include <linux/netlink.h>
 #include <linux/rtnetlink.h>
 
 #include <vlib/vlib.h>
 #include <vlib/unix/unix.h>
+#include <vnet/devices/netlink.h>
 
-clib_error_t *
-vnet_netlink_set_if_attr (int ifindex, unsigned short rta_type, void *data,
-			  int data_len)
+typedef struct
+{
+  u8 *data;
+} vnet_netlink_msg_t;
+
+static void
+vnet_netlink_msg_init (vnet_netlink_msg_t * m, u16 type, u16 flags,
+		       void *msg_data, int msg_len)
+{
+  struct nlmsghdr *nh;
+  u8 *p;
+  clib_memset (m, 0, sizeof (vnet_netlink_msg_t));
+  vec_add2 (m->data, p, NLMSG_SPACE (msg_len));
+  ASSERT (m->data == p);
+
+  nh = (struct nlmsghdr *) p;
+  nh->nlmsg_flags = flags | NLM_F_ACK;
+  nh->nlmsg_type = type;
+  clib_memcpy (m->data + sizeof (struct nlmsghdr), msg_data, msg_len);
+}
+
+static void
+vnet_netlink_msg_add_rtattr (vnet_netlink_msg_t * m, u16 rta_type,
+			     void *rta_data, int rta_data_len)
+{
+  struct rtattr *rta;
+  u8 *p;
+
+  vec_add2 (m->data, p, RTA_SPACE (rta_data_len));
+  rta = (struct rtattr *) p;
+  rta->rta_type = rta_type;
+  rta->rta_len = RTA_LENGTH (rta_data_len);
+  clib_memcpy (RTA_DATA (rta), rta_data, rta_data_len);
+}
+
+static clib_error_t *
+vnet_netlink_msg_send (vnet_netlink_msg_t * m)
 {
   clib_error_t *err = 0;
-  int sock;
   struct sockaddr_nl ra = { 0 };
-  struct
-  {
-    struct nlmsghdr nh;
-    struct ifinfomsg ifmsg;
-    char attrbuf[512];
-  } req;
-  struct rtattr *rta;
+  int len, sock;
+  struct nlmsghdr *nh = (struct nlmsghdr *) m->data;
+  nh->nlmsg_len = vec_len (m->data);
+  char buf[4096];
 
-  memset (&req, 0, sizeof (req));
   if ((sock = socket (AF_NETLINK, SOCK_RAW, NETLINK_ROUTE)) == -1)
     return clib_error_return_unix (0, "socket(AF_NETLINK)");
 
   ra.nl_family = AF_NETLINK;
-  ra.nl_pid = getpid ();
+  ra.nl_pid = 0;
 
   if ((bind (sock, (struct sockaddr *) &ra, sizeof (ra))) == -1)
     {
       err = clib_error_return_unix (0, "bind");
-      goto error;
+      goto done;
     }
 
-  req.nh.nlmsg_len = NLMSG_LENGTH (sizeof (struct ifinfomsg));
-  req.nh.nlmsg_flags = NLM_F_REQUEST;
-  req.nh.nlmsg_type = RTM_SETLINK;
-  req.ifmsg.ifi_family = AF_UNSPEC;
-  req.ifmsg.ifi_index = ifindex;
-  req.ifmsg.ifi_change = 0xffffffff;
-  rta = (struct rtattr *) (((char *) &req) + NLMSG_ALIGN (req.nh.nlmsg_len));
-  rta->rta_type = rta_type;
-  rta->rta_len = RTA_LENGTH (data_len);
-  req.nh.nlmsg_len = NLMSG_ALIGN (req.nh.nlmsg_len) + RTA_LENGTH (data_len);
-  memcpy (RTA_DATA (rta), data, data_len);
-
-  if ((send (sock, &req, req.nh.nlmsg_len, 0)) == -1)
+  if ((send (sock, m->data, vec_len (m->data), 0)) == -1)
     err = clib_error_return_unix (0, "send");
 
-error:
+  if ((len = recv (sock, buf, sizeof (buf), 0)) == -1)
+    err = clib_error_return_unix (0, "recv");
+
+  for (nh = (struct nlmsghdr *) buf; NLMSG_OK (nh, len);
+       nh = NLMSG_NEXT (nh, len))
+    {
+      if (nh->nlmsg_type == NLMSG_DONE)
+	goto done;
+
+      if (nh->nlmsg_type == NLMSG_ERROR)
+	{
+	  struct nlmsgerr *e = (struct nlmsgerr *) NLMSG_DATA (nh);
+	  if (e->error)
+	    err = clib_error_return (0, "netlink error %d", e->error);
+	  goto done;
+	}
+    }
+
+done:
   close (sock);
+  vec_free (m->data);
   return err;
 }
 
 clib_error_t *
-vnet_netlink_set_if_mtu (int ifindex, int mtu)
+vnet_netlink_set_link_name (int ifindex, char *new_ifname)
 {
-  clib_error_t *err;
+  vnet_netlink_msg_t m;
+  struct ifinfomsg ifmsg = { 0 };
+  clib_error_t *err = 0;
 
-  err = vnet_netlink_set_if_attr (ifindex, IFLA_MTU, &mtu, sizeof (int));
+  ifmsg.ifi_index = ifindex;
+  vnet_netlink_msg_init (&m, RTM_SETLINK, NLM_F_REQUEST,
+			 &ifmsg, sizeof (struct ifinfomsg));
+
+  vnet_netlink_msg_add_rtattr (&m, IFLA_IFNAME, new_ifname,
+			       strlen (new_ifname) + 1);
+
+  err = vnet_netlink_msg_send (&m);
+  if (err)
+    err = clib_error_return (0, "set link name %U", format_clib_error, err);
   return err;
 }
 
 clib_error_t *
-vnet_netlink_set_if_namespace (int ifindex, char *net_ns)
+vnet_netlink_set_link_netns (int ifindex, int netns_fd, char *new_ifname)
 {
-  clib_error_t *err;
-  int ns_fd;
-  u8 *s;
-  s = format (0, "/var/run/netns/%s%c", net_ns, 0);
-  ns_fd = open ((char *) s, O_RDONLY);
-  vec_free (s);
-  if (ns_fd == -1)
-    return clib_error_return (0, "namespace '%s' doesn't exist", net_ns);
-
-  err =
-    vnet_netlink_set_if_attr (ifindex, IFLA_NET_NS_FD, &ns_fd, sizeof (int));
-  close (ns_fd);
+  vnet_netlink_msg_t m;
+  struct ifinfomsg ifmsg = { 0 };
+  clib_error_t *err = 0;
+
+  ifmsg.ifi_index = ifindex;
+  vnet_netlink_msg_init (&m, RTM_SETLINK, NLM_F_REQUEST,
+			 &ifmsg, sizeof (struct ifinfomsg));
+
+  vnet_netlink_msg_add_rtattr (&m, IFLA_NET_NS_FD, &netns_fd, sizeof (int));
+  if (new_ifname)
+    vnet_netlink_msg_add_rtattr (&m, IFLA_IFNAME, new_ifname,
+				 strlen (new_ifname) + 1);
+
+  err = vnet_netlink_msg_send (&m);
+  if (err)
+    err = clib_error_return (0, "set link netns %U", format_clib_error, err);
+  return err;
+}
+
+clib_error_t *
+vnet_netlink_set_link_master (int ifindex, char *master_ifname)
+{
+  vnet_netlink_msg_t m;
+  struct ifinfomsg ifmsg = { 0 };
+  int i;
+  clib_error_t *err = 0;
+
+  ifmsg.ifi_index = ifindex;
+
+  if ((i = if_nametoindex (master_ifname)) == 0)
+    clib_error_return_unix (0, "unknown master interface '%s'",
+			    master_ifname);
+
+  vnet_netlink_msg_init (&m, RTM_SETLINK, NLM_F_REQUEST,
+			 &ifmsg, sizeof (struct ifinfomsg));
+  vnet_netlink_msg_add_rtattr (&m, IFLA_MASTER, &i, sizeof (int));
+  err = vnet_netlink_msg_send (&m);
+  if (err)
+    err = clib_error_return (0, "set link master %U", format_clib_error, err);
+  return err;
+}
+
+clib_error_t *
+vnet_netlink_set_link_addr (int ifindex, u8 * mac)
+{
+  vnet_netlink_msg_t m;
+  struct ifinfomsg ifmsg = { 0 };
+  clib_error_t *err = 0;
+
+  ifmsg.ifi_index = ifindex;
+
+  vnet_netlink_msg_init (&m, RTM_SETLINK, NLM_F_REQUEST,
+			 &ifmsg, sizeof (struct ifinfomsg));
+  vnet_netlink_msg_add_rtattr (&m, IFLA_ADDRESS, mac, 6);
+  err = vnet_netlink_msg_send (&m);
+  if (err)
+    err = clib_error_return (0, "set link addr %U", format_clib_error, err);
+  return err;
+}
+
+clib_error_t *
+vnet_netlink_set_link_state (int ifindex, int up)
+{
+  vnet_netlink_msg_t m;
+  struct ifinfomsg ifmsg = { 0 };
+  clib_error_t *err = 0;
+
+  ifmsg.ifi_flags = IFF_UP;
+  ifmsg.ifi_change = IFF_UP;
+  ifmsg.ifi_index = ifindex;
+
+  vnet_netlink_msg_init (&m, RTM_SETLINK, NLM_F_REQUEST,
+			 &ifmsg, sizeof (struct ifinfomsg));
+  err = vnet_netlink_msg_send (&m);
+  if (err)
+    err = clib_error_return (0, "set link state %U", format_clib_error, err);
+  return err;
+}
+
+clib_error_t *
+vnet_netlink_set_link_mtu (int ifindex, int mtu)
+{
+  vnet_netlink_msg_t m;
+  struct ifinfomsg ifmsg = { 0 };
+  clib_error_t *err = 0;
+
+  ifmsg.ifi_index = ifindex;
+
+  vnet_netlink_msg_init (&m, RTM_SETLINK, NLM_F_REQUEST,
+			 &ifmsg, sizeof (struct ifinfomsg));
+  vnet_netlink_msg_add_rtattr (&m, IFLA_MTU, &mtu, sizeof (int));
+  err = vnet_netlink_msg_send (&m);
+  if (err)
+    err = clib_error_return (0, "set link mtu %U", format_clib_error, err);
+  return err;
+}
+
+clib_error_t *
+vnet_netlink_add_ip4_addr (int ifindex, void *addr, int pfx_len)
+{
+  vnet_netlink_msg_t m;
+  struct ifaddrmsg ifa = { 0 };
+  clib_error_t *err = 0;
+
+  ifa.ifa_family = AF_INET;
+  ifa.ifa_prefixlen = pfx_len;
+  ifa.ifa_index = ifindex;
+
+  vnet_netlink_msg_init (&m, RTM_NEWADDR,
+			 NLM_F_REQUEST | NLM_F_REPLACE,
+			 &ifa, sizeof (struct ifaddrmsg));
+
+  vnet_netlink_msg_add_rtattr (&m, IFA_LOCAL, addr, 4);
+  vnet_netlink_msg_add_rtattr (&m, IFA_ADDRESS, addr, 4);
+  err = vnet_netlink_msg_send (&m);
+  if (err)
+    err = clib_error_return (0, "add ip4 addr %U", format_clib_error, err);
+  return err;
+}
+
+clib_error_t *
+vnet_netlink_add_ip6_addr (int ifindex, void *addr, int pfx_len)
+{
+  vnet_netlink_msg_t m;
+  struct ifaddrmsg ifa = { 0 };
+  clib_error_t *err = 0;
+
+  ifa.ifa_family = AF_INET6;
+  ifa.ifa_prefixlen = pfx_len;
+  ifa.ifa_index = ifindex;
+
+  vnet_netlink_msg_init (&m, RTM_NEWADDR,
+			 NLM_F_REQUEST | NLM_F_REPLACE,
+			 &ifa, sizeof (struct ifaddrmsg));
+
+  vnet_netlink_msg_add_rtattr (&m, IFA_LOCAL, addr, 16);
+  vnet_netlink_msg_add_rtattr (&m, IFA_ADDRESS, addr, 16);
+  err = vnet_netlink_msg_send (&m);
+  if (err)
+    err = clib_error_return (0, "add ip6 addr %U", format_clib_error, err);
+  return err;
+}
+
+clib_error_t *
+vnet_netlink_add_ip4_route (void *dst, u8 dst_len, void *gw)
+{
+  vnet_netlink_msg_t m;
+  struct rtmsg rtm = { 0 };
+  u8 dflt[4] = { 0 };
+  clib_error_t *err = 0;
+
+  rtm.rtm_family = AF_INET;
+  rtm.rtm_table = RT_TABLE_MAIN;
+  rtm.rtm_type = RTN_UNICAST;
+  rtm.rtm_dst_len = dst_len;
+
+  vnet_netlink_msg_init (&m, RTM_NEWROUTE,
+			 NLM_F_REQUEST | NLM_F_REPLACE,
+			 &rtm, sizeof (struct rtmsg));
+
+  vnet_netlink_msg_add_rtattr (&m, RTA_GATEWAY, gw, 4);
+  vnet_netlink_msg_add_rtattr (&m, RTA_DST, dst ? dst : dflt, 4);
+  err = vnet_netlink_msg_send (&m);
+  if (err)
+    err = clib_error_return (0, "add ip4 route %U", format_clib_error, err);
+  return err;
+}
+
+clib_error_t *
+vnet_netlink_add_ip6_route (void *dst, u8 dst_len, void *gw)
+{
+  vnet_netlink_msg_t m;
+  struct rtmsg rtm = { 0 };
+  u8 dflt[16] = { 0 };
+  clib_error_t *err = 0;
+
+  rtm.rtm_family = AF_INET6;
+  rtm.rtm_table = RT_TABLE_MAIN;
+  rtm.rtm_type = RTN_UNICAST;
+  rtm.rtm_dst_len = dst_len;
+
+  vnet_netlink_msg_init (&m, RTM_NEWROUTE,
+			 NLM_F_REQUEST | NLM_F_REPLACE,
+			 &rtm, sizeof (struct rtmsg));
+
+  vnet_netlink_msg_add_rtattr (&m, RTA_GATEWAY, gw, 16);
+  vnet_netlink_msg_add_rtattr (&m, RTA_DST, dst ? dst : dflt, 16);
+  err = vnet_netlink_msg_send (&m);
+  if (err)
+    err = clib_error_return (0, "add ip6 route %U", format_clib_error, err);
   return err;
 }