networkd-netdev-vxlan.c revision ea0288d17c0713eea601ea6c7715a649842d229d
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
/***
This file is part of systemd.
Copyright 2014 Susant Sahani
systemd is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
systemd is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
#include <net/if.h>
#include "sd-netlink.h"
#include "conf-parser.h"
#include "alloc-util.h"
#include "parse-util.h"
#include "missing.h"
#include "networkd-link.h"
#include "networkd-netdev-vxlan.h"
static int netdev_vxlan_fill_message_create(NetDev *netdev, Link *link, sd_netlink_message *m) {
VxLan *v;
int r;
assert(netdev);
assert(link);
assert(m);
v = VXLAN(netdev);
assert(v);
if (v->id <= VXLAN_VID_MAX) {
r = sd_netlink_message_append_u32(m, IFLA_VXLAN_ID, v->id);
if (r < 0)
return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_ID attribute: %m");
}
r = sd_netlink_message_append_in_addr(m, IFLA_VXLAN_GROUP, &v->group.in);
if (r < 0)
return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_GROUP attribute: %m");
r = sd_netlink_message_append_u32(m, IFLA_VXLAN_LINK, link->ifindex);
if (r < 0)
return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_LINK attribute: %m");
if(v->ttl) {
r = sd_netlink_message_append_u8(m, IFLA_VXLAN_TTL, v->ttl);
if (r < 0)
return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_TTL attribute: %m");
}
if(v->tos) {
r = sd_netlink_message_append_u8(m, IFLA_VXLAN_TOS, v->tos);
if (r < 0)
return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_TOS attribute: %m");
}
r = sd_netlink_message_append_u8(m, IFLA_VXLAN_LEARNING, v->learning);
if (r < 0)
return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_LEARNING attribute: %m");
r = sd_netlink_message_append_u8(m, IFLA_VXLAN_RSC, v->route_short_circuit);
if (r < 0)
return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_RSC attribute: %m");
r = sd_netlink_message_append_u8(m, IFLA_VXLAN_PROXY, v->arp_proxy);
if (r < 0)
return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_PROXY attribute: %m");
r = sd_netlink_message_append_u8(m, IFLA_VXLAN_L2MISS, v->l2miss);
if (r < 0)
return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_L2MISS attribute: %m");
r = sd_netlink_message_append_u8(m, IFLA_VXLAN_L3MISS, v->l3miss);
if (r < 0)
return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_L3MISS attribute: %m");
if(v->fdb_ageing) {
r = sd_netlink_message_append_u32(m, IFLA_VXLAN_AGEING, v->fdb_ageing / USEC_PER_SEC);
if (r < 0)
return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_AGEING attribute: %m");
}
if (v->max_fdb) {
r = sd_netlink_message_append_u32(m, IFLA_VXLAN_LIMIT, v->max_fdb);
if (r < 0)
return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_LIMIT attribute: %m");
}
r = sd_netlink_message_append_u8(m, IFLA_VXLAN_UDP_CSUM, v->udpcsum);
if (r < 0)
return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_UDP_CSUM attribute: %m");
r = sd_netlink_message_append_u8(m, IFLA_VXLAN_UDP_ZERO_CSUM6_TX, v->udp6zerocsumtx);
if (r < 0)
return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_UDP_ZERO_CSUM6_TX attribute: %m");
r = sd_netlink_message_append_u8(m, IFLA_VXLAN_UDP_ZERO_CSUM6_RX, v->udp6zerocsumrx);
if (r < 0)
return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_UDP_ZERO_CSUM6_RX attribute: %m");
r = sd_netlink_message_append_u16(m, IFLA_VXLAN_PORT, htobe16(v->dest_port));
if (r < 0)
return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_PORT attribute: %m");
if (v->port_range.low || v->port_range.high) {
struct ifla_vxlan_port_range port_range;
port_range.low = htobe16(v->port_range.low);
port_range.high = htobe16(v->port_range.high);
r = sd_netlink_message_append_data(m, IFLA_VXLAN_PORT_RANGE, &port_range, sizeof(port_range));
if (r < 0)
return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_PORT_RANGE attribute: %m");
}
if (v->group_policy) {
r = sd_netlink_message_append_flag(m, IFLA_VXLAN_GBP);
if (r < 0)
return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_GBP attribute: %m");
}
return r;
}
int config_parse_vxlan_group_address(const char *unit,
const char *filename,
unsigned line,
const char *section,
unsigned section_line,
const char *lvalue,
int ltype,
const char *rvalue,
void *data,
void *userdata) {
VxLan *v = userdata;
union in_addr_union *addr = data, buffer;
int r, f;
assert(filename);
assert(lvalue);
assert(rvalue);
assert(data);
r = in_addr_from_string_auto(rvalue, &f, &buffer);
if (r < 0) {
log_syntax(unit, LOG_ERR, filename, line, r, "vxlan multicast group address is invalid, ignoring assignment: %s", rvalue);
return 0;
}
if (v->family != AF_UNSPEC && v->family != f) {
log_syntax(unit, LOG_ERR, filename, line, 0, "vxlan multicast group incompatible, ignoring assignment: %s", rvalue);
return 0;
}
v->family = f;
*addr = buffer;
return 0;
}
int config_parse_port_range(const char *unit,
const char *filename,
unsigned line,
const char *section,
unsigned section_line,
const char *lvalue,
int ltype,
const char *rvalue,
void *data,
void *userdata) {
_cleanup_free_ char *word = NULL;
VxLan *v = userdata;
unsigned low, high;
int r;
assert(filename);
assert(lvalue);
assert(rvalue);
assert(data);
r = extract_first_word(&rvalue, &word, NULL, 0);
if (r < 0) {
log_syntax(unit, LOG_ERR, filename, line, r, "Failed to extract VXLAN port range, ignoring: %s", rvalue);
return 0;
}
if (r == 0)
return 0;
r = parse_range(word, &low, &high);
if (r < 0) {
log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse VXLAN port range '%s'", word);
return 0;
}
if (low <= 0 || low > 65535 || high <= 0 || high > 65535) {
log_syntax(unit, LOG_ERR, filename, line, r,
"Failed to parse VXLAN port range '%s'. Port should be greater than 0 and less than 65535.", word);
return 0;
}
if (high < low) {
log_syntax(unit, LOG_ERR, filename, line, r,
"Failed to parse VXLAN port range '%s'. Port range %u .. %u not valid", word, low, high);
return 0;
}
v->port_range.low = low;
v->port_range.high = high;
return 0;
}
int config_parse_destination_port(const char *unit,
const char *filename,
unsigned line,
const char *section,
unsigned section_line,
const char *lvalue,
int ltype,
const char *rvalue,
void *data,
void *userdata) {
VxLan *v = userdata;
uint16_t port;
int r;
assert(filename);
assert(lvalue);
assert(rvalue);
assert(data);
r = safe_atou16(rvalue, &port);
if (r < 0 || port <= 0) {
log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse VXLAN destination port '%s'.", rvalue);
return 0;
}
v->dest_port = port;
return 0;
}
static int netdev_vxlan_verify(NetDev *netdev, const char *filename) {
VxLan *v = VXLAN(netdev);
assert(netdev);
assert(v);
assert(filename);
if (v->id > VXLAN_VID_MAX) {
log_warning("VXLAN without valid Id configured in %s. Ignoring", filename);
return -EINVAL;
}
return 0;
}
static void vxlan_init(NetDev *netdev) {
VxLan *v;
assert(netdev);
v = VXLAN(netdev);
assert(v);
v->id = VXLAN_VID_MAX + 1;
v->learning = true;
v->udpcsum = false;
v->udp6zerocsumtx = false;
v->udp6zerocsumrx = false;
}
const NetDevVTable vxlan_vtable = {
.object_size = sizeof(VxLan),
.init = vxlan_init,
.sections = "Match\0NetDev\0VXLAN\0",
.fill_message_create = netdev_vxlan_fill_message_create,
.create_type = NETDEV_CREATE_STACKED,
.config_verify = netdev_vxlan_verify,
};