src/network/netdev/vxlan.c

   1 /***
   2     This file is part of systemd.
   3
   4     Copyright 2014 Susant Sahani
   5
   6     systemd is free software; you can redistribute it and/or modify it
   7     under the terms of the GNU Lesser General Public License as published by
   8     the Free Software Foundation; either version 2.1 of the License, or
   9     (at your option) any later version.
  10
  11     systemd is distributed in the hope that it will be useful, but
  12     WITHOUT ANY WARRANTY; without even the implied warranty of
  13     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  14     Lesser General Public License for more details.
  15
  16     You should have received a copy of the GNU Lesser General Public License
  17     along with systemd; If not, see <http://www.gnu.org/licenses/>.
  18 ***/
  19
  20 #include <net/if.h>
  21
  22 #include "sd-netlink.h"
  23
  24 #include "conf-parser.h"
  25 #include "alloc-util.h"
  26 #include "extract-word.h"
  27 #include "string-util.h"
  28 #include "strv.h"
  29 #include "parse-util.h"
  30 #include "missing.h"
  31
  32 #include "networkd-link.h"
  33 #include "netdev/vxlan.h"
  34
  35 static int netdev_vxlan_fill_message_create(NetDev *netdev, Link *link, sd_netlink_message *m) {
  36         VxLan *v;
  37         int r;
  38
  39         assert(netdev);
  40         assert(link);
  41         assert(m);
  42
  43         v = VXLAN(netdev);
  44
  45         assert(v);
  46
  47         if (v->id <= VXLAN_VID_MAX) {
  48                 r = sd_netlink_message_append_u32(m, IFLA_VXLAN_ID, v->id);
  49                 if (r < 0)
  50                         return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_ID attribute: %m");
  51         }
  52
  53         if (!in_addr_is_null(v->remote_family, &v->remote)) {
  54
  55                 if (v->remote_family == AF_INET)
  56                         r = sd_netlink_message_append_in_addr(m, IFLA_VXLAN_GROUP, &v->remote.in);
  57                 else
  58                         r = sd_netlink_message_append_in6_addr(m, IFLA_VXLAN_GROUP6, &v->remote.in6);
  59
  60                 if (r < 0)
  61                         return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_GROUP attribute: %m");
  62
  63         }
  64
  65         if (!in_addr_is_null(v->local_family, &v->local)) {
  66
  67                 if (v->local_family == AF_INET)
  68                         r = sd_netlink_message_append_in_addr(m, IFLA_VXLAN_LOCAL, &v->local.in);
  69                 else
  70                         r = sd_netlink_message_append_in6_addr(m, IFLA_VXLAN_LOCAL6, &v->local.in6);
  71
  72                 if (r < 0)
  73                         return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_LOCAL attribute: %m");
  74
  75         }
  76
  77         r = sd_netlink_message_append_u32(m, IFLA_VXLAN_LINK, link->ifindex);
  78         if (r < 0)
  79                 return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_LINK attribute: %m");
  80
  81         if (v->ttl) {
  82                 r = sd_netlink_message_append_u8(m, IFLA_VXLAN_TTL, v->ttl);
  83                 if (r < 0)
  84                         return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_TTL attribute: %m");
  85         }
  86
  87         if (v->tos) {
  88                 r = sd_netlink_message_append_u8(m, IFLA_VXLAN_TOS, v->tos);
  89                 if (r < 0)
  90                         return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_TOS attribute: %m");
  91         }
  92
  93         r = sd_netlink_message_append_u8(m, IFLA_VXLAN_LEARNING, v->learning);
  94         if (r < 0)
  95                 return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_LEARNING attribute: %m");
  96
  97         r = sd_netlink_message_append_u8(m, IFLA_VXLAN_RSC, v->route_short_circuit);
  98         if (r < 0)
  99                 return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_RSC attribute: %m");
 100
 101         r = sd_netlink_message_append_u8(m, IFLA_VXLAN_PROXY, v->arp_proxy);
 102         if (r < 0)
 103                 return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_PROXY attribute: %m");
 104
 105         r = sd_netlink_message_append_u8(m, IFLA_VXLAN_L2MISS, v->l2miss);
 106         if (r < 0)
 107                 return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_L2MISS attribute: %m");
 108
 109         r = sd_netlink_message_append_u8(m, IFLA_VXLAN_L3MISS, v->l3miss);
 110         if (r < 0)
 111                 return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_L3MISS attribute: %m");
 112
 113         if (v->fdb_ageing) {
 114                 r = sd_netlink_message_append_u32(m, IFLA_VXLAN_AGEING, v->fdb_ageing / USEC_PER_SEC);
 115                 if (r < 0)
 116                         return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_AGEING attribute: %m");
 117         }
 118
 119         if (v->max_fdb) {
 120                 r = sd_netlink_message_append_u32(m, IFLA_VXLAN_LIMIT, v->max_fdb);
 121                 if (r < 0)
 122                         return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_LIMIT attribute: %m");
 123         }
 124
 125         r = sd_netlink_message_append_u8(m, IFLA_VXLAN_UDP_CSUM, v->udpcsum);
 126         if (r < 0)
 127                 return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_UDP_CSUM attribute: %m");
 128
 129         r = sd_netlink_message_append_u8(m, IFLA_VXLAN_UDP_ZERO_CSUM6_TX, v->udp6zerocsumtx);
 130         if (r < 0)
 131                 return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_UDP_ZERO_CSUM6_TX attribute: %m");
 132
 133         r = sd_netlink_message_append_u8(m, IFLA_VXLAN_UDP_ZERO_CSUM6_RX, v->udp6zerocsumrx);
 134         if (r < 0)
 135                 return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_UDP_ZERO_CSUM6_RX attribute: %m");
 136
 137         r = sd_netlink_message_append_u8(m, IFLA_VXLAN_REMCSUM_TX, v->remote_csum_tx);
 138         if (r < 0)
 139                 return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_REMCSUM_TX attribute: %m");
 140
 141         r = sd_netlink_message_append_u8(m, IFLA_VXLAN_REMCSUM_RX, v->remote_csum_rx);
 142         if (r < 0)
 143                 return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_REMCSUM_RX attribute: %m");
 144
 145         r = sd_netlink_message_append_u16(m, IFLA_VXLAN_PORT, htobe16(v->dest_port));
 146         if (r < 0)
 147                 return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_PORT attribute: %m");
 148
 149         if (v->port_range.low || v->port_range.high) {
 150                 struct ifla_vxlan_port_range port_range;
 151
 152                 port_range.low = htobe16(v->port_range.low);
 153                 port_range.high = htobe16(v->port_range.high);
 154
 155                 r = sd_netlink_message_append_data(m, IFLA_VXLAN_PORT_RANGE, &port_range, sizeof(port_range));
 156                 if (r < 0)
 157                         return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_PORT_RANGE attribute: %m");
 158         }
 159
 160         r = sd_netlink_message_append_u32(m, IFLA_VXLAN_LABEL, htobe32(v->flow_label));
 161         if (r < 0)
 162                 return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_LABEL attribute: %m");
 163
 164         if (v->group_policy) {
 165                 r = sd_netlink_message_append_flag(m, IFLA_VXLAN_GBP);
 166                 if (r < 0)
 167                         return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_GBP attribute: %m");
 168         }
 169
 170         return r;
 171 }
 172
 173 int config_parse_vxlan_address(const char *unit,
 174                                const char *filename,
 175                                unsigned line,
 176                                const char *section,
 177                                unsigned section_line,
 178                                const char *lvalue,
 179                                int ltype,
 180                                const char *rvalue,
 181                                void *data,
 182                                void *userdata) {
 183         VxLan *v = userdata;
 184         union in_addr_union *addr = data, buffer;
 185         int r, f;
 186
 187         assert(filename);
 188         assert(lvalue);
 189         assert(rvalue);
 190         assert(data);
 191
 192         r = in_addr_from_string_auto(rvalue, &f, &buffer);
 193         if (r < 0) {
 194                 log_syntax(unit, LOG_ERR, filename, line, r, "vxlan '%s' address is invalid, ignoring assignment: %s", lvalue, rvalue);
 195                 return 0;
 196         }
 197
 198         r = in_addr_is_multicast(f, &buffer);
 199
 200         if (STR_IN_SET(lvalue, "Group", "Remote")) {
 201                 if (r <= 0) {
 202                         log_syntax(unit, LOG_ERR, filename, line, 0, "vxlan invalid multicast '%s' address, ignoring assignment: %s", lvalue, rvalue);
 203                         return 0;
 204                 }
 205
 206                 v->remote_family = f;
 207         } else {
 208                 if (r > 0) {
 209                         log_syntax(unit, LOG_ERR, filename, line, 0, "vxlan %s can not be multicast address, ignoring assignment: %s", lvalue, rvalue);
 210                         return 0;
 211                 }
 212
 213                 v->local_family = f;
 214         }
 215
 216         *addr = buffer;
 217
 218         return 0;
 219 }
 220
 221 int config_parse_port_range(const char *unit,
 222                             const char *filename,
 223                             unsigned line,
 224                             const char *section,
 225                             unsigned section_line,
 226                             const char *lvalue,
 227                             int ltype,
 228                             const char *rvalue,
 229                             void *data,
 230                             void *userdata) {
 231         _cleanup_free_ char *word = NULL;
 232         VxLan *v = userdata;
 233         unsigned low, high;
 234         int r;
 235
 236         assert(filename);
 237         assert(lvalue);
 238         assert(rvalue);
 239         assert(data);
 240
 241         r = extract_first_word(&rvalue, &word, NULL, 0);
 242         if (r < 0) {
 243                 log_syntax(unit, LOG_ERR, filename, line, r, "Failed to extract VXLAN port range, ignoring: %s", rvalue);
 244                 return 0;
 245         }
 246
 247         if (r == 0)
 248                 return 0;
 249
 250         r = parse_range(word, &low, &high);
 251         if (r < 0) {
 252                 log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse VXLAN port range '%s'", word);
 253                 return 0;
 254         }
 255
 256         if (low <= 0 || low > 65535 || high <= 0 || high > 65535) {
 257                 log_syntax(unit, LOG_ERR, filename, line, r,
 258                            "Failed to parse VXLAN port range '%s'. Port should be greater than 0 and less than 65535.", word);
 259                 return 0;
 260         }
 261
 262         if (high < low) {
 263                 log_syntax(unit, LOG_ERR, filename, line, r,
 264                            "Failed to parse VXLAN port range '%s'. Port range %u .. %u not valid", word, low, high);
 265                 return 0;
 266         }
 267
 268         v->port_range.low = low;
 269         v->port_range.high = high;
 270
 271         return 0;
 272 }
 273
 274 int config_parse_flow_label(const char *unit,
 275                             const char *filename,
 276                             unsigned line,
 277                             const char *section,
 278                             unsigned section_line,
 279                             const char *lvalue,
 280                             int ltype,
 281                             const char *rvalue,
 282                             void *data,
 283                             void *userdata) {
 284         VxLan *v = userdata;
 285         unsigned f;
 286         int r;
 287
 288         assert(filename);
 289         assert(lvalue);
 290         assert(rvalue);
 291         assert(data);
 292
 293         r = safe_atou(rvalue, &f);
 294         if (r < 0) {
 295                 log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse VXLAN flow label '%s'.", rvalue);
 296                 return 0;
 297         }
 298
 299         if (f & ~VXLAN_FLOW_LABEL_MAX_MASK) {
 300                 log_syntax(unit, LOG_ERR, filename, line, r,
 301                            "VXLAN flow label '%s' not valid. Flow label range should be [0-1048575].", rvalue);
 302                 return 0;
 303         }
 304
 305         v->flow_label = f;
 306
 307         return 0;
 308 }
 309
 310 static int netdev_vxlan_verify(NetDev *netdev, const char *filename) {
 311         VxLan *v = VXLAN(netdev);
 312
 313         assert(netdev);
 314         assert(v);
 315         assert(filename);
 316
 317         if (v->id > VXLAN_VID_MAX) {
 318                 log_warning("VXLAN without valid Id configured in %s. Ignoring", filename);
 319                 return -EINVAL;
 320         }
 321
 322         return 0;
 323 }
 324
 325 static void vxlan_init(NetDev *netdev) {
 326         VxLan *v;
 327
 328         assert(netdev);
 329
 330         v = VXLAN(netdev);
 331
 332         assert(v);
 333
 334         v->id = VXLAN_VID_MAX + 1;
 335         v->learning = true;
 336         v->udpcsum = false;
 337         v->udp6zerocsumtx = false;
 338         v->udp6zerocsumrx = false;
 339 }
 340
 341 const NetDevVTable vxlan_vtable = {
 342         .object_size = sizeof(VxLan),
 343         .init = vxlan_init,
 344         .sections = "Match\0NetDev\0VXLAN\0",
 345         .fill_message_create = netdev_vxlan_fill_message_create,
 346         .create_type = NETDEV_CREATE_STACKED,
 347         .config_verify = netdev_vxlan_verify,
 348 };