diff options
Diffstat (limited to 'src/network/netdev/geneve.c')
| -rw-r--r-- | src/network/netdev/geneve.c | 276 |
1 files changed, 276 insertions, 0 deletions
diff --git a/src/network/netdev/geneve.c b/src/network/netdev/geneve.c new file mode 100644 index 0000000..bc655ec --- /dev/null +++ b/src/network/netdev/geneve.c @@ -0,0 +1,276 @@ +/* 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, +}; |