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/* SPDX-License-Identifier: LGPL-2.1-or-later */
#include <net/if.h>
#include <netinet/in.h>
#include <linux/if_arp.h>
#include "alloc-util.h"
#include "conf-parser.h"
#include "extract-word.h"
#include "geneve.h"
#include "netlink-util.h"
#include "networkd-manager.h"
#include "parse-util.h"
#include "string-table.h"
#include "string-util.h"
#include "strv.h"
#define GENEVE_FLOW_LABEL_MAX_MASK 0xFFFFFU
#define DEFAULT_GENEVE_DESTINATION_PORT 6081
static const char* const geneve_df_table[_NETDEV_GENEVE_DF_MAX] = {
[NETDEV_GENEVE_DF_NO] = "no",
[NETDEV_GENEVE_DF_YES] = "yes",
[NETDEV_GENEVE_DF_INHERIT] = "inherit",
};
DEFINE_STRING_TABLE_LOOKUP_WITH_BOOLEAN(geneve_df, GeneveDF, NETDEV_GENEVE_DF_YES);
DEFINE_CONFIG_PARSE_ENUM(config_parse_geneve_df, geneve_df, GeneveDF, "Failed to parse Geneve IPDoNotFragment= setting");
static int netdev_geneve_fill_message_create(NetDev *netdev, Link *link, sd_netlink_message *m) {
assert(m);
Geneve *v = GENEVE(netdev);
int r;
if (v->id <= GENEVE_VID_MAX) {
r = sd_netlink_message_append_u32(m, IFLA_GENEVE_ID, v->id);
if (r < 0)
return r;
}
if (in_addr_is_set(v->remote_family, &v->remote)) {
if (v->remote_family == AF_INET)
r = sd_netlink_message_append_in_addr(m, IFLA_GENEVE_REMOTE, &v->remote.in);
else
r = sd_netlink_message_append_in6_addr(m, IFLA_GENEVE_REMOTE6, &v->remote.in6);
if (r < 0)
return r;
}
if (v->inherit) {
r = sd_netlink_message_append_u8(m, IFLA_GENEVE_TTL_INHERIT, 1);
if (r < 0)
return r;
} else {
r = sd_netlink_message_append_u8(m, IFLA_GENEVE_TTL, v->ttl);
if (r < 0)
return r;
}
r = sd_netlink_message_append_u8(m, IFLA_GENEVE_TOS, v->tos);
if (r < 0)
return r;
r = sd_netlink_message_append_u8(m, IFLA_GENEVE_UDP_CSUM, v->udpcsum);
if (r < 0)
return r;
r = sd_netlink_message_append_u8(m, IFLA_GENEVE_UDP_ZERO_CSUM6_TX, v->udp6zerocsumtx);
if (r < 0)
return r;
r = sd_netlink_message_append_u8(m, IFLA_GENEVE_UDP_ZERO_CSUM6_RX, v->udp6zerocsumrx);
if (r < 0)
return r;
if (v->dest_port != DEFAULT_GENEVE_DESTINATION_PORT) {
r = sd_netlink_message_append_u16(m, IFLA_GENEVE_PORT, htobe16(v->dest_port));
if (r < 0)
return r;
}
if (v->flow_label > 0) {
r = sd_netlink_message_append_u32(m, IFLA_GENEVE_LABEL, htobe32(v->flow_label));
if (r < 0)
return r;
}
if (v->inherit_inner_protocol) {
r = sd_netlink_message_append_flag(m, IFLA_GENEVE_INNER_PROTO_INHERIT);
if (r < 0)
return r;
}
if (v->geneve_df != _NETDEV_GENEVE_DF_INVALID) {
r = sd_netlink_message_append_u8(m, IFLA_GENEVE_DF, v->geneve_df);
if (r < 0)
return r;
}
return 0;
}
int config_parse_geneve_vni(
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) {
assert(filename);
assert(lvalue);
assert(rvalue);
assert(data);
Geneve *v = ASSERT_PTR(userdata);
return config_parse_uint32_bounded(
unit, filename, line, section, section_line, lvalue, rvalue,
0, GENEVE_VID_MAX, true,
&v->id);
}
int config_parse_geneve_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) {
assert(filename);
assert(lvalue);
assert(rvalue);
assert(data);
Geneve *v = ASSERT_PTR(userdata);
union in_addr_union *addr = data, buffer;
int r, f;
r = in_addr_from_string_auto(rvalue, &f, &buffer);
if (r < 0) {
log_syntax(unit, LOG_WARNING, filename, line, r,
"geneve '%s' address is invalid, ignoring assignment: %s", lvalue, rvalue);
return 0;
}
r = in_addr_is_multicast(f, &buffer);
if (r > 0) {
log_syntax(unit, LOG_WARNING, filename, line, 0,
"geneve invalid multicast '%s' address, ignoring assignment: %s", lvalue, rvalue);
return 0;
}
v->remote_family = f;
*addr = buffer;
return 0;
}
int config_parse_geneve_flow_label(
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) {
assert(filename);
assert(lvalue);
assert(rvalue);
assert(data);
Geneve *v = ASSERT_PTR(userdata);
uint32_t f;
int r;
r = safe_atou32(rvalue, &f);
if (r < 0) {
log_syntax(unit, LOG_WARNING, filename, line, r, "Failed to parse Geneve flow label '%s'.", rvalue);
return 0;
}
if (f & ~GENEVE_FLOW_LABEL_MAX_MASK) {
log_syntax(unit, LOG_WARNING, filename, line, 0,
"Geneve flow label '%s' not valid. Flow label range should be [0-1048575].", rvalue);
return 0;
}
v->flow_label = f;
return 0;
}
int config_parse_geneve_ttl(
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) {
assert(filename);
assert(lvalue);
assert(rvalue);
assert(data);
Geneve *v = ASSERT_PTR(userdata);
int r;
if (streq(rvalue, "inherit")) {
v->inherit = true;
v->ttl = 0; /* unset the unused ttl field for clarity */
return 0;
}
r = config_parse_uint8_bounded(
unit, filename, line, section, section_line, lvalue, rvalue,
0, UINT8_MAX, true,
&v->ttl);
if (r <= 0)
return r;
v->inherit = false;
return 0;
}
static int netdev_geneve_verify(NetDev *netdev, const char *filename) {
assert(filename);
Geneve *v = GENEVE(netdev);
if (v->id > GENEVE_VID_MAX)
return log_netdev_warning_errno(netdev, SYNTHETIC_ERRNO(EINVAL),
"%s: Geneve without valid VNI (or Virtual Network Identifier) configured. Ignoring.",
filename);
return 0;
}
static void geneve_init(NetDev *netdev) {
Geneve *v = GENEVE(netdev);
v->id = GENEVE_VID_MAX + 1;
v->geneve_df = _NETDEV_GENEVE_DF_INVALID;
v->dest_port = DEFAULT_GENEVE_DESTINATION_PORT;
v->udpcsum = false;
v->udp6zerocsumtx = false;
v->udp6zerocsumrx = false;
}
const NetDevVTable geneve_vtable = {
.object_size = sizeof(Geneve),
.init = geneve_init,
.sections = NETDEV_COMMON_SECTIONS "GENEVE\0",
.fill_message_create = netdev_geneve_fill_message_create,
.create_type = NETDEV_CREATE_INDEPENDENT,
.config_verify = netdev_geneve_verify,
.iftype = ARPHRD_ETHER,
.generate_mac = true,
};
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