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
   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         if (v->group_policy) {
 105                 r = sd_netlink_message_append_flag(m, IFLA_VXLAN_GBP);
 106                 if (r < 0)
 107                         return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_GBP attribute: %m");
 108         }
 109
 110         return r;
 111 }
 112
 113 int config_parse_vxlan_group_address(const char *unit,
 114                                      const char *filename,
 115                                      unsigned line,
 116                                      const char *section,
 117                                      unsigned section_line,
 118                                      const char *lvalue,
 119                                      int ltype,
 120                                      const char *rvalue,
 121                                      void *data,
 122                                      void *userdata) {
 123         VxLan *v = userdata;
 124         union in_addr_union *addr = data, buffer;
 125         int r, f;
 126
 127         assert(filename);
 128         assert(lvalue);
 129         assert(rvalue);
 130         assert(data);
 131
 132         r = in_addr_from_string_auto(rvalue, &f, &buffer);
 133         if (r < 0) {
 134                 log_syntax(unit, LOG_ERR, filename, line, EINVAL,
 135                            "vxlan multicast group address is invalid, ignoring assignment: %s", rvalue);
 136                 return 0;
 137         }
 138
 139         if(v->family != AF_UNSPEC && v->family != f) {
 140                 log_syntax(unit, LOG_ERR, filename, line, EINVAL,
 141                            "vxlan multicast group incompatible, ignoring assignment: %s", rvalue);
 142                 return 0;
 143         }
 144
 145         v->family = f;
 146         *addr = buffer;
 147
 148         return 0;
 149 }
 150
 151 static int netdev_vxlan_verify(NetDev *netdev, const char *filename) {
 152         VxLan *v = VXLAN(netdev);
 153
 154         assert(netdev);
 155         assert(v);
 156         assert(filename);
 157
 158         if (v->id > VXLAN_VID_MAX) {
 159                 log_warning("VXLAN without valid Id configured in %s. Ignoring", filename);
 160                 return -EINVAL;
 161         }
 162
 163         return 0;
 164 }
 165
 166 static void vxlan_init(NetDev *netdev) {
 167         VxLan *v = VXLAN(netdev);
 168
 169         assert(netdev);
 170         assert(v);
 171
 172         v->id = VXLAN_VID_MAX + 1;
 173         v->learning = true;
 174         v->udpcsum = false;
 175         v->udp6zerocsumtx = false;
 176         v->udp6zerocsumrx = false;
 177 }
 178
 179 const NetDevVTable vxlan_vtable = {
 180         .object_size = sizeof(VxLan),
 181         .init = vxlan_init,
 182         .sections = "Match\0NetDev\0VXLAN\0",
 183         .fill_message_create = netdev_vxlan_fill_message_create,
 184         .create_type = NETDEV_CREATE_STACKED,
 185         .config_verify = netdev_vxlan_verify,
 186 };