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         if (!in_addr_is_null(v->local_family, &v->local)) {
  48
  49                 if (v->local_family == AF_INET)
  50                         r = sd_netlink_message_append_in_addr(m, IFLA_VXLAN_LOCAL, &v->local.in);
  51                 else
  52                         r = sd_netlink_message_append_in6_addr(m, IFLA_VXLAN_LOCAL6, &v->local.in6);
  53
  54                 if (r < 0)
  55                         return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_LOCAL attribute: %m");
  56         }
  57
  58         r = sd_netlink_message_append_u32(m, IFLA_VXLAN_LINK, link->ifindex);
  59         if (r < 0)
  60                 return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_LINK attribute: %m");
  61
  62         if (v->ttl != 0) {
  63                 r = sd_netlink_message_append_u8(m, IFLA_VXLAN_TTL, v->ttl);
  64                 if (r < 0)
  65                         return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_TTL attribute: %m");
  66         }
  67
  68         if (v->tos != 0) {
  69                 r = sd_netlink_message_append_u8(m, IFLA_VXLAN_TOS, v->tos);
  70                 if (r < 0)
  71                         return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_TOS attribute: %m");
  72         }
  73
  74         r = sd_netlink_message_append_u8(m, IFLA_VXLAN_LEARNING, v->learning);
  75         if (r < 0)
  76                 return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_LEARNING attribute: %m");
  77
  78         r = sd_netlink_message_append_u8(m, IFLA_VXLAN_RSC, v->route_short_circuit);
  79         if (r < 0)
  80                 return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_RSC attribute: %m");
  81
  82         r = sd_netlink_message_append_u8(m, IFLA_VXLAN_PROXY, v->arp_proxy);
  83         if (r < 0)
  84                 return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_PROXY attribute: %m");
  85
  86         r = sd_netlink_message_append_u8(m, IFLA_VXLAN_L2MISS, v->l2miss);
  87         if (r < 0)
  88                 return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_L2MISS attribute: %m");
  89
  90         r = sd_netlink_message_append_u8(m, IFLA_VXLAN_L3MISS, v->l3miss);
  91         if (r < 0)
  92                 return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_L3MISS attribute: %m");
  93
  94         if (v->fdb_ageing != 0) {
  95                 r = sd_netlink_message_append_u32(m, IFLA_VXLAN_AGEING, v->fdb_ageing / USEC_PER_SEC);
  96                 if (r < 0)
  97                         return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_AGEING attribute: %m");
  98         }
  99
 100         if (v->max_fdb != 0) {
 101                 r = sd_netlink_message_append_u32(m, IFLA_VXLAN_LIMIT, v->max_fdb);
 102                 if (r < 0)
 103                         return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_LIMIT attribute: %m");
 104         }
 105
 106         r = sd_netlink_message_append_u8(m, IFLA_VXLAN_UDP_CSUM, v->udpcsum);
 107         if (r < 0)
 108                 return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_UDP_CSUM attribute: %m");
 109
 110         r = sd_netlink_message_append_u8(m, IFLA_VXLAN_UDP_ZERO_CSUM6_TX, v->udp6zerocsumtx);
 111         if (r < 0)
 112                 return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_UDP_ZERO_CSUM6_TX attribute: %m");
 113
 114         r = sd_netlink_message_append_u8(m, IFLA_VXLAN_UDP_ZERO_CSUM6_RX, v->udp6zerocsumrx);
 115         if (r < 0)
 116                 return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_UDP_ZERO_CSUM6_RX attribute: %m");
 117
 118         r = sd_netlink_message_append_u8(m, IFLA_VXLAN_REMCSUM_TX, v->remote_csum_tx);
 119         if (r < 0)
 120                 return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_REMCSUM_TX attribute: %m");
 121
 122         r = sd_netlink_message_append_u8(m, IFLA_VXLAN_REMCSUM_RX, v->remote_csum_rx);
 123         if (r < 0)
 124                 return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_REMCSUM_RX attribute: %m");
 125
 126         r = sd_netlink_message_append_u16(m, IFLA_VXLAN_PORT, htobe16(v->dest_port));
 127         if (r < 0)
 128                 return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_PORT attribute: %m");
 129
 130         if (v->port_range.low != 0 || v->port_range.high != 0) {
 131                 struct ifla_vxlan_port_range port_range;
 132
 133                 port_range.low = htobe16(v->port_range.low);
 134                 port_range.high = htobe16(v->port_range.high);
 135
 136                 r = sd_netlink_message_append_data(m, IFLA_VXLAN_PORT_RANGE, &port_range, sizeof(port_range));
 137                 if (r < 0)
 138                         return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_PORT_RANGE attribute: %m");
 139         }
 140
 141         r = sd_netlink_message_append_u32(m, IFLA_VXLAN_LABEL, htobe32(v->flow_label));
 142         if (r < 0)
 143                 return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_LABEL attribute: %m");
 144
 145         if (v->group_policy) {
 146                 r = sd_netlink_message_append_flag(m, IFLA_VXLAN_GBP);
 147                 if (r < 0)
 148                         return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_GBP attribute: %m");
 149         }
 150
 151         return r;
 152 }
 153
 154 int config_parse_vxlan_address(const char *unit,
 155                                const char *filename,
 156                                unsigned line,
 157                                const char *section,
 158                                unsigned section_line,
 159                                const char *lvalue,
 160                                int ltype,
 161                                const char *rvalue,
 162                                void *data,
 163                                void *userdata) {
 164         VxLan *v = userdata;
 165         union in_addr_union *addr = data, buffer;
 166         int r, f;
 167
 168         assert(filename);
 169         assert(lvalue);
 170         assert(rvalue);
 171         assert(data);
 172
 173         r = in_addr_from_string_auto(rvalue, &f, &buffer);
 174         if (r < 0) {
 175                 log_syntax(unit, LOG_ERR, filename, line, r, "vxlan '%s' address is invalid, ignoring assignment: %s", lvalue, rvalue);
 176                 return 0;
 177         }
 178
 179         r = in_addr_is_multicast(f, &buffer);
 180
 181         if (streq(lvalue, "Group")) {
 182                 if (r <= 0) {
 183                         log_syntax(unit, LOG_ERR, filename, line, 0, "vxlan %s invalid multicast address, ignoring assignment: %s", lvalue, rvalue);
 184                         return 0;
 185                 }
 186
 187                 v->remote_family = f;
 188         } else {
 189                 if (r > 0) {
 190                         log_syntax(unit, LOG_ERR, filename, line, 0, "vxlan %s cannot be a multicast address, ignoring assignment: %s", lvalue, rvalue);
 191                         return 0;
 192                 }
 193
 194                 if (streq(lvalue, "Remote"))
 195                         v->remote_family = f;
 196                 else
 197                         v->local_family = f;
 198         }
 199
 200         *addr = buffer;
 201
 202         return 0;
 203 }
 204
 205 int config_parse_port_range(const char *unit,
 206                             const char *filename,
 207                             unsigned line,
 208                             const char *section,
 209                             unsigned section_line,
 210                             const char *lvalue,
 211                             int ltype,
 212                             const char *rvalue,
 213                             void *data,
 214                             void *userdata) {
 215         VxLan *v = userdata;
 216         uint16_t low, high;
 217         int r;
 218
 219         assert(filename);
 220         assert(lvalue);
 221         assert(rvalue);
 222         assert(data);
 223
 224         r = parse_ip_port_range(rvalue, &low, &high);
 225         if (r < 0) {
 226                 log_syntax(unit, LOG_ERR, filename, line, r,
 227                            "Failed to parse VXLAN port range '%s'. Port should be greater than 0 and less than 65535.", rvalue);
 228                 return 0;
 229         }
 230
 231         v->port_range.low = low;
 232         v->port_range.high = high;
 233
 234         return 0;
 235 }
 236
 237 int config_parse_flow_label(const char *unit,
 238                             const char *filename,
 239                             unsigned line,
 240                             const char *section,
 241                             unsigned section_line,
 242                             const char *lvalue,
 243                             int ltype,
 244                             const char *rvalue,
 245                             void *data,
 246                             void *userdata) {
 247         VxLan *v = userdata;
 248         unsigned f;
 249         int r;
 250
 251         assert(filename);
 252         assert(lvalue);
 253         assert(rvalue);
 254         assert(data);
 255
 256         r = safe_atou(rvalue, &f);
 257         if (r < 0) {
 258                 log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse VXLAN flow label '%s'.", rvalue);
 259                 return 0;
 260         }
 261
 262         if (f & ~VXLAN_FLOW_LABEL_MAX_MASK) {
 263                 log_syntax(unit, LOG_ERR, filename, line, r,
 264                            "VXLAN flow label '%s' not valid. Flow label range should be [0-1048575].", rvalue);
 265                 return 0;
 266         }
 267
 268         v->flow_label = f;
 269
 270         return 0;
 271 }
 272
 273 static int netdev_vxlan_verify(NetDev *netdev, const char *filename) {
 274         VxLan *v = VXLAN(netdev);
 275
 276         assert(netdev);
 277         assert(v);
 278         assert(filename);
 279
 280         if (v->id > VXLAN_VID_MAX) {
 281                 log_warning("VXLAN without valid Id configured in %s. Ignoring", filename);
 282                 return -EINVAL;
 283         }
 284
 285         return 0;
 286 }
 287
 288 static void vxlan_init(NetDev *netdev) {
 289         VxLan *v;
 290
 291         assert(netdev);
 292
 293         v = VXLAN(netdev);
 294
 295         assert(v);
 296
 297         v->id = VXLAN_VID_MAX + 1;
 298         v->learning = true;
 299         v->udpcsum = false;
 300         v->udp6zerocsumtx = false;
 301         v->udp6zerocsumrx = false;
 302 }
 303
 304 const NetDevVTable vxlan_vtable = {
 305         .object_size = sizeof(VxLan),
 306         .init = vxlan_init,
 307         .sections = "Match\0NetDev\0VXLAN\0",
 308         .fill_message_create = netdev_vxlan_fill_message_create,
 309         .create_type = NETDEV_CREATE_STACKED,
 310         .config_verify = netdev_vxlan_verify,
 311 };