src/network/netdev/vxlan.c

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