src/network/networkd-netdev-vxlan.c

   1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
   2
   3 /***
   4     This file is part of systemd.
   5
   6     Copyright 2014 Susant Sahani <susant@redhat.com>
   7
   8     systemd is free software; you can redistribute it and/or modify it
   9     under the terms of the GNU Lesser General Public License as published by
  10     the Free Software Foundation; either version 2.1 of the License, or
  11     (at your option) any later version.
  12
  13     systemd is distributed in the hope that it will be useful, but
  14     WITHOUT ANY WARRANTY; without even the implied warranty of
  15     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16     Lesser General Public License for more details.
  17
  18     You should have received a copy of the GNU Lesser General Public License
  19     along with systemd; If not, see <http://www.gnu.org/licenses/>.
  20 ***/
  21
  22 #include <net/if.h>
  23
  24 #include "sd-netlink.h"
  25 #include "networkd-netdev-vxlan.h"
  26 #include "networkd-link.h"
  27 #include "conf-parser.h"
  28 #include "missing.h"
  29
  30 static int netdev_vxlan_fill_message_create(NetDev *netdev, Link *link, sd_netlink_message *m) {
  31         VxLan *v = VXLAN(netdev);
  32         int r;
  33
  34         assert(netdev);
  35         assert(v);
  36         assert(link);
  37         assert(m);
  38
  39
  40         if (v->id <= VXLAN_VID_MAX) {
  41                 r = sd_netlink_message_append_u32(m, IFLA_VXLAN_ID, v->id);
  42                 if (r < 0)
  43                         return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_ID attribute: %m");
  44         }
  45
  46         r = sd_netlink_message_append_in_addr(m, IFLA_VXLAN_GROUP, &v->group.in);
  47         if (r < 0)
  48                 return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_GROUP attribute: %m");
  49
  50         r = sd_netlink_message_append_u32(m, IFLA_VXLAN_LINK, link->ifindex);
  51         if (r < 0)
  52                 return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_LINK attribute: %m");
  53
  54         if(v->ttl) {
  55                 r = sd_netlink_message_append_u8(m, IFLA_VXLAN_TTL, v->ttl);
  56                 if (r < 0)
  57                         return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_TTL attribute: %m");
  58         }
  59
  60         if(v->tos) {
  61                 r = sd_netlink_message_append_u8(m, IFLA_VXLAN_TOS, v->tos);
  62                 if (r < 0)
  63                         return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_TOS attribute: %m");
  64         }
  65
  66         r = sd_netlink_message_append_u8(m, IFLA_VXLAN_LEARNING, v->learning);
  67         if (r < 0)
  68                 return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_LEARNING attribute: %m");
  69
  70         r = sd_netlink_message_append_u8(m, IFLA_VXLAN_RSC, v->route_short_circuit);
  71         if (r < 0)
  72                 return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_RSC attribute: %m");
  73
  74         r = sd_netlink_message_append_u8(m, IFLA_VXLAN_PROXY, v->arp_proxy);
  75         if (r < 0)
  76                 return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_PROXY attribute: %m");
  77
  78         r = sd_netlink_message_append_u8(m, IFLA_VXLAN_L2MISS, v->l2miss);
  79         if (r < 0)
  80                 return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_L2MISS attribute: %m");
  81
  82         r = sd_netlink_message_append_u8(m, IFLA_VXLAN_L3MISS, v->l3miss);
  83         if (r < 0)
  84                 return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_L3MISS attribute: %m");
  85
  86         if(v->fdb_ageing) {
  87                 r = sd_netlink_message_append_u32(m, IFLA_VXLAN_AGEING, v->fdb_ageing / USEC_PER_SEC);
  88                 if (r < 0)
  89                         return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_AGEING attribute: %m");
  90         }
  91
  92         r = sd_netlink_message_append_u8(m, IFLA_VXLAN_UDP_CSUM, v->udpcsum);
  93         if (r < 0)
  94                 return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_UDP_CSUM attribute: %m");
  95
  96         r = sd_netlink_message_append_u8(m, IFLA_VXLAN_UDP_ZERO_CSUM6_TX, v->udp6zerocsumtx);
  97         if (r < 0)
  98                 return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_UDP_ZERO_CSUM6_TX attribute: %m");
  99
 100         r = sd_netlink_message_append_u8(m, IFLA_VXLAN_UDP_ZERO_CSUM6_RX, v->udp6zerocsumrx);
 101         if (r < 0)
 102                 return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_UDP_ZERO_CSUM6_RX attribute: %m");
 103
 104         return r;
 105 }
 106
 107 int config_parse_vxlan_group_address(const char *unit,
 108                                      const char *filename,
 109                                      unsigned line,
 110                                      const char *section,
 111                                      unsigned section_line,
 112                                      const char *lvalue,
 113                                      int ltype,
 114                                      const char *rvalue,
 115                                      void *data,
 116                                      void *userdata) {
 117         VxLan *v = userdata;
 118         union in_addr_union *addr = data, buffer;
 119         int r, f;
 120
 121         assert(filename);
 122         assert(lvalue);
 123         assert(rvalue);
 124         assert(data);
 125
 126         r = in_addr_from_string_auto(rvalue, &f, &buffer);
 127         if (r < 0) {
 128                 log_syntax(unit, LOG_ERR, filename, line, EINVAL,
 129                            "vxlan multicast group address is invalid, ignoring assignment: %s", rvalue);
 130                 return 0;
 131         }
 132
 133         if(v->family != AF_UNSPEC && v->family != f) {
 134                 log_syntax(unit, LOG_ERR, filename, line, EINVAL,
 135                            "vxlan multicast group incompatible, ignoring assignment: %s", rvalue);
 136                 return 0;
 137         }
 138
 139         v->family = f;
 140         *addr = buffer;
 141
 142         return 0;
 143 }
 144
 145 static int netdev_vxlan_verify(NetDev *netdev, const char *filename) {
 146         VxLan *v = VXLAN(netdev);
 147
 148         assert(netdev);
 149         assert(v);
 150         assert(filename);
 151
 152         if (v->id > VXLAN_VID_MAX) {
 153                 log_warning("VXLAN without valid Id configured in %s. Ignoring", filename);
 154                 return -EINVAL;
 155         }
 156
 157         return 0;
 158 }
 159
 160 static void vxlan_init(NetDev *netdev) {
 161         VxLan *v = VXLAN(netdev);
 162
 163         assert(netdev);
 164         assert(v);
 165
 166         v->id = VXLAN_VID_MAX + 1;
 167         v->learning = true;
 168         v->udpcsum = false;
 169         v->udp6zerocsumtx = false;
 170         v->udp6zerocsumrx = false;
 171 }
 172
 173 const NetDevVTable vxlan_vtable = {
 174         .object_size = sizeof(VxLan),
 175         .init = vxlan_init,
 176         .sections = "Match\0NetDev\0VXLAN\0",
 177         .fill_message_create = netdev_vxlan_fill_message_create,
 178         .create_type = NETDEV_CREATE_STACKED,
 179         .config_verify = netdev_vxlan_verify,
 180 };