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) == 0) {
  37                 if (v->remote_family == AF_INET)
  38                         r = sd_netlink_message_append_in_addr(m, IFLA_VXLAN_GROUP, &v->remote.in);
  39                 else
  40                         r = sd_netlink_message_append_in6_addr(m, IFLA_VXLAN_GROUP6, &v->remote.in6);
  41                 if (r < 0)
  42                         return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_GROUP attribute: %m");
  43         }
  44
  45         if (in_addr_is_null(v->local_family, &v->local) == 0) {
  46                 if (v->local_family == AF_INET)
  47                         r = sd_netlink_message_append_in_addr(m, IFLA_VXLAN_LOCAL, &v->local.in);
  48                 else
  49                         r = sd_netlink_message_append_in6_addr(m, IFLA_VXLAN_LOCAL6, &v->local.in6);
  50                 if (r < 0)
  51                         return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_LOCAL attribute: %m");
  52         }
  53
  54         r = sd_netlink_message_append_u32(m, IFLA_VXLAN_LINK, link->ifindex);
  55         if (r < 0)
  56                 return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_LINK attribute: %m");
  57
  58         if (v->ttl != 0) {
  59                 r = sd_netlink_message_append_u8(m, IFLA_VXLAN_TTL, v->ttl);
  60                 if (r < 0)
  61                         return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_TTL attribute: %m");
  62         }
  63
  64         if (v->tos != 0) {
  65                 r = sd_netlink_message_append_u8(m, IFLA_VXLAN_TOS, v->tos);
  66                 if (r < 0)
  67                         return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_TOS attribute: %m");
  68         }
  69
  70         r = sd_netlink_message_append_u8(m, IFLA_VXLAN_LEARNING, v->learning);
  71         if (r < 0)
  72                 return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_LEARNING attribute: %m");
  73
  74         r = sd_netlink_message_append_u8(m, IFLA_VXLAN_RSC, v->route_short_circuit);
  75         if (r < 0)
  76                 return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_RSC attribute: %m");
  77
  78         r = sd_netlink_message_append_u8(m, IFLA_VXLAN_PROXY, v->arp_proxy);
  79         if (r < 0)
  80                 return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_PROXY attribute: %m");
  81
  82         r = sd_netlink_message_append_u8(m, IFLA_VXLAN_L2MISS, v->l2miss);
  83         if (r < 0)
  84                 return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_L2MISS attribute: %m");
  85
  86         r = sd_netlink_message_append_u8(m, IFLA_VXLAN_L3MISS, v->l3miss);
  87         if (r < 0)
  88                 return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_L3MISS attribute: %m");
  89
  90         if (v->fdb_ageing != 0) {
  91                 r = sd_netlink_message_append_u32(m, IFLA_VXLAN_AGEING, v->fdb_ageing / USEC_PER_SEC);
  92                 if (r < 0)
  93                         return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_AGEING attribute: %m");
  94         }
  95
  96         if (v->max_fdb != 0) {
  97                 r = sd_netlink_message_append_u32(m, IFLA_VXLAN_LIMIT, v->max_fdb);
  98                 if (r < 0)
  99                         return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_LIMIT attribute: %m");
 100         }
 101
 102         r = sd_netlink_message_append_u8(m, IFLA_VXLAN_UDP_CSUM, v->udpcsum);
 103         if (r < 0)
 104                 return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_UDP_CSUM attribute: %m");
 105
 106         r = sd_netlink_message_append_u8(m, IFLA_VXLAN_UDP_ZERO_CSUM6_TX, v->udp6zerocsumtx);
 107         if (r < 0)
 108                 return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_UDP_ZERO_CSUM6_TX attribute: %m");
 109
 110         r = sd_netlink_message_append_u8(m, IFLA_VXLAN_UDP_ZERO_CSUM6_RX, v->udp6zerocsumrx);
 111         if (r < 0)
 112                 return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_UDP_ZERO_CSUM6_RX attribute: %m");
 113
 114         r = sd_netlink_message_append_u8(m, IFLA_VXLAN_REMCSUM_TX, v->remote_csum_tx);
 115         if (r < 0)
 116                 return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_REMCSUM_TX attribute: %m");
 117
 118         r = sd_netlink_message_append_u8(m, IFLA_VXLAN_REMCSUM_RX, v->remote_csum_rx);
 119         if (r < 0)
 120                 return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_REMCSUM_RX attribute: %m");
 121
 122         r = sd_netlink_message_append_u16(m, IFLA_VXLAN_PORT, htobe16(v->dest_port));
 123         if (r < 0)
 124                 return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_PORT attribute: %m");
 125
 126         if (v->port_range.low != 0 || v->port_range.high != 0) {
 127                 struct ifla_vxlan_port_range port_range;
 128
 129                 port_range.low = htobe16(v->port_range.low);
 130                 port_range.high = htobe16(v->port_range.high);
 131
 132                 r = sd_netlink_message_append_data(m, IFLA_VXLAN_PORT_RANGE, &port_range, sizeof(port_range));
 133                 if (r < 0)
 134                         return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_PORT_RANGE attribute: %m");
 135         }
 136
 137         r = sd_netlink_message_append_u32(m, IFLA_VXLAN_LABEL, htobe32(v->flow_label));
 138         if (r < 0)
 139                 return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_LABEL attribute: %m");
 140
 141         if (v->group_policy) {
 142                 r = sd_netlink_message_append_flag(m, IFLA_VXLAN_GBP);
 143                 if (r < 0)
 144                         return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_GBP attribute: %m");
 145         }
 146
 147         return r;
 148 }
 149
 150 int config_parse_vxlan_address(const char *unit,
 151                                const char *filename,
 152                                unsigned line,
 153                                const char *section,
 154                                unsigned section_line,
 155                                const char *lvalue,
 156                                int ltype,
 157                                const char *rvalue,
 158                                void *data,
 159                                void *userdata) {
 160         VxLan *v = userdata;
 161         union in_addr_union *addr = data, buffer;
 162         int r, f;
 163
 164         assert(filename);
 165         assert(lvalue);
 166         assert(rvalue);
 167         assert(data);
 168
 169         r = in_addr_from_string_auto(rvalue, &f, &buffer);
 170         if (r < 0) {
 171                 log_syntax(unit, LOG_ERR, filename, line, r, "vxlan '%s' address is invalid, ignoring assignment: %s", lvalue, rvalue);
 172                 return 0;
 173         }
 174
 175         r = in_addr_is_multicast(f, &buffer);
 176
 177         if (streq(lvalue, "Group")) {
 178                 if (r <= 0) {
 179                         log_syntax(unit, LOG_ERR, filename, line, 0, "vxlan %s invalid multicast address, ignoring assignment: %s", lvalue, rvalue);
 180                         return 0;
 181                 }
 182
 183                 v->remote_family = f;
 184         } else {
 185                 if (r > 0) {
 186                         log_syntax(unit, LOG_ERR, filename, line, 0, "vxlan %s cannot be a multicast address, ignoring assignment: %s", lvalue, rvalue);
 187                         return 0;
 188                 }
 189
 190                 if (streq(lvalue, "Remote"))
 191                         v->remote_family = f;
 192                 else
 193                         v->local_family = f;
 194         }
 195
 196         *addr = buffer;
 197
 198         return 0;
 199 }
 200
 201 int config_parse_port_range(const char *unit,
 202                             const char *filename,
 203                             unsigned line,
 204                             const char *section,
 205                             unsigned section_line,
 206                             const char *lvalue,
 207                             int ltype,
 208                             const char *rvalue,
 209                             void *data,
 210                             void *userdata) {
 211         VxLan *v = userdata;
 212         uint16_t low, high;
 213         int r;
 214
 215         assert(filename);
 216         assert(lvalue);
 217         assert(rvalue);
 218         assert(data);
 219
 220         r = parse_ip_port_range(rvalue, &low, &high);
 221         if (r < 0) {
 222                 log_syntax(unit, LOG_ERR, filename, line, r,
 223                            "Failed to parse VXLAN port range '%s'. Port should be greater than 0 and less than 65535.", rvalue);
 224                 return 0;
 225         }
 226
 227         v->port_range.low = low;
 228         v->port_range.high = high;
 229
 230         return 0;
 231 }
 232
 233 int config_parse_flow_label(const char *unit,
 234                             const char *filename,
 235                             unsigned line,
 236                             const char *section,
 237                             unsigned section_line,
 238                             const char *lvalue,
 239                             int ltype,
 240                             const char *rvalue,
 241                             void *data,
 242                             void *userdata) {
 243         VxLan *v = userdata;
 244         unsigned f;
 245         int r;
 246
 247         assert(filename);
 248         assert(lvalue);
 249         assert(rvalue);
 250         assert(data);
 251
 252         r = safe_atou(rvalue, &f);
 253         if (r < 0) {
 254                 log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse VXLAN flow label '%s'.", rvalue);
 255                 return 0;
 256         }
 257
 258         if (f & ~VXLAN_FLOW_LABEL_MAX_MASK) {
 259                 log_syntax(unit, LOG_ERR, filename, line, r,
 260                            "VXLAN flow label '%s' not valid. Flow label range should be [0-1048575].", rvalue);
 261                 return 0;
 262         }
 263
 264         v->flow_label = f;
 265
 266         return 0;
 267 }
 268
 269 static int netdev_vxlan_verify(NetDev *netdev, const char *filename) {
 270         VxLan *v = VXLAN(netdev);
 271
 272         assert(netdev);
 273         assert(v);
 274         assert(filename);
 275
 276         if (v->id > VXLAN_VID_MAX) {
 277                 log_warning("VXLAN without valid Id configured in %s. Ignoring", filename);
 278                 return -EINVAL;
 279         }
 280
 281         return 0;
 282 }
 283
 284 static void vxlan_init(NetDev *netdev) {
 285         VxLan *v;
 286
 287         assert(netdev);
 288
 289         v = VXLAN(netdev);
 290
 291         assert(v);
 292
 293         v->id = VXLAN_VID_MAX + 1;
 294         v->learning = true;
 295         v->udpcsum = false;
 296         v->udp6zerocsumtx = false;
 297         v->udp6zerocsumrx = false;
 298 }
 299
 300 const NetDevVTable vxlan_vtable = {
 301         .object_size = sizeof(VxLan),
 302         .init = vxlan_init,
 303         .sections = "Match\0NetDev\0VXLAN\0",
 304         .fill_message_create = netdev_vxlan_fill_message_create,
 305         .create_type = NETDEV_CREATE_STACKED,
 306         .config_verify = netdev_vxlan_verify,
 307 };