src/network/netdev/vxlan.c

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