diff --git a/libc/kernel/common/linux/pfkeyv2.h b/libc/kernel/common/linux/pfkeyv2.h
new file mode 100644
index 0000000..3ac9488
--- /dev/null
+++ b/libc/kernel/common/linux/pfkeyv2.h
@@ -0,0 +1,306 @@
+/****************************************************************************
+ ****************************************************************************
+ ***
+ ***   This header was automatically generated from a Linux kernel header
+ ***   of the same name, to make information necessary for userspace to
+ ***   call into the kernel available to libc.  It contains only constants,
+ ***   structures, and macros generated from the original header, and thus,
+ ***   contains no copyrightable information.
+ ***
+ ****************************************************************************
+ ****************************************************************************/
+#ifndef _LINUX_PFKEY2_H
+#define _LINUX_PFKEY2_H
+
+#include <linux/types.h>
+
+#define PF_KEY_V2 2
+#define PFKEYV2_REVISION 199806L
+
+struct sadb_msg {
+ uint8_t sadb_msg_version;
+ uint8_t sadb_msg_type;
+ uint8_t sadb_msg_errno;
+ uint8_t sadb_msg_satype;
+ uint16_t sadb_msg_len;
+ uint16_t sadb_msg_reserved;
+ uint32_t sadb_msg_seq;
+ uint32_t sadb_msg_pid;
+} __attribute__((packed));
+
+struct sadb_ext {
+ uint16_t sadb_ext_len;
+ uint16_t sadb_ext_type;
+} __attribute__((packed));
+
+struct sadb_sa {
+ uint16_t sadb_sa_len;
+ uint16_t sadb_sa_exttype;
+ uint32_t sadb_sa_spi;
+ uint8_t sadb_sa_replay;
+ uint8_t sadb_sa_state;
+ uint8_t sadb_sa_auth;
+ uint8_t sadb_sa_encrypt;
+ uint32_t sadb_sa_flags;
+} __attribute__((packed));
+
+struct sadb_lifetime {
+ uint16_t sadb_lifetime_len;
+ uint16_t sadb_lifetime_exttype;
+ uint32_t sadb_lifetime_allocations;
+ uint64_t sadb_lifetime_bytes;
+ uint64_t sadb_lifetime_addtime;
+ uint64_t sadb_lifetime_usetime;
+} __attribute__((packed));
+
+struct sadb_address {
+ uint16_t sadb_address_len;
+ uint16_t sadb_address_exttype;
+ uint8_t sadb_address_proto;
+ uint8_t sadb_address_prefixlen;
+ uint16_t sadb_address_reserved;
+} __attribute__((packed));
+
+struct sadb_key {
+ uint16_t sadb_key_len;
+ uint16_t sadb_key_exttype;
+ uint16_t sadb_key_bits;
+ uint16_t sadb_key_reserved;
+} __attribute__((packed));
+
+struct sadb_ident {
+ uint16_t sadb_ident_len;
+ uint16_t sadb_ident_exttype;
+ uint16_t sadb_ident_type;
+ uint16_t sadb_ident_reserved;
+ uint64_t sadb_ident_id;
+} __attribute__((packed));
+
+struct sadb_sens {
+ uint16_t sadb_sens_len;
+ uint16_t sadb_sens_exttype;
+ uint32_t sadb_sens_dpd;
+ uint8_t sadb_sens_sens_level;
+ uint8_t sadb_sens_sens_len;
+ uint8_t sadb_sens_integ_level;
+ uint8_t sadb_sens_integ_len;
+ uint32_t sadb_sens_reserved;
+} __attribute__((packed));
+
+struct sadb_prop {
+ uint16_t sadb_prop_len;
+ uint16_t sadb_prop_exttype;
+ uint8_t sadb_prop_replay;
+ uint8_t sadb_prop_reserved[3];
+} __attribute__((packed));
+
+struct sadb_comb {
+ uint8_t sadb_comb_auth;
+ uint8_t sadb_comb_encrypt;
+ uint16_t sadb_comb_flags;
+ uint16_t sadb_comb_auth_minbits;
+ uint16_t sadb_comb_auth_maxbits;
+ uint16_t sadb_comb_encrypt_minbits;
+ uint16_t sadb_comb_encrypt_maxbits;
+ uint32_t sadb_comb_reserved;
+ uint32_t sadb_comb_soft_allocations;
+ uint32_t sadb_comb_hard_allocations;
+ uint64_t sadb_comb_soft_bytes;
+ uint64_t sadb_comb_hard_bytes;
+ uint64_t sadb_comb_soft_addtime;
+ uint64_t sadb_comb_hard_addtime;
+ uint64_t sadb_comb_soft_usetime;
+ uint64_t sadb_comb_hard_usetime;
+} __attribute__((packed));
+
+struct sadb_supported {
+ uint16_t sadb_supported_len;
+ uint16_t sadb_supported_exttype;
+ uint32_t sadb_supported_reserved;
+} __attribute__((packed));
+
+struct sadb_alg {
+ uint8_t sadb_alg_id;
+ uint8_t sadb_alg_ivlen;
+ uint16_t sadb_alg_minbits;
+ uint16_t sadb_alg_maxbits;
+ uint16_t sadb_alg_reserved;
+} __attribute__((packed));
+
+struct sadb_spirange {
+ uint16_t sadb_spirange_len;
+ uint16_t sadb_spirange_exttype;
+ uint32_t sadb_spirange_min;
+ uint32_t sadb_spirange_max;
+ uint32_t sadb_spirange_reserved;
+} __attribute__((packed));
+
+struct sadb_x_kmprivate {
+ uint16_t sadb_x_kmprivate_len;
+ uint16_t sadb_x_kmprivate_exttype;
+ uint32_t sadb_x_kmprivate_reserved;
+} __attribute__((packed));
+
+struct sadb_x_sa2 {
+ uint16_t sadb_x_sa2_len;
+ uint16_t sadb_x_sa2_exttype;
+ uint8_t sadb_x_sa2_mode;
+ uint8_t sadb_x_sa2_reserved1;
+ uint16_t sadb_x_sa2_reserved2;
+ uint32_t sadb_x_sa2_sequence;
+ uint32_t sadb_x_sa2_reqid;
+} __attribute__((packed));
+
+struct sadb_x_policy {
+ uint16_t sadb_x_policy_len;
+ uint16_t sadb_x_policy_exttype;
+ uint16_t sadb_x_policy_type;
+ uint8_t sadb_x_policy_dir;
+ uint8_t sadb_x_policy_reserved;
+ uint32_t sadb_x_policy_id;
+ uint32_t sadb_x_policy_priority;
+} __attribute__((packed));
+
+struct sadb_x_ipsecrequest {
+ uint16_t sadb_x_ipsecrequest_len;
+ uint16_t sadb_x_ipsecrequest_proto;
+ uint8_t sadb_x_ipsecrequest_mode;
+ uint8_t sadb_x_ipsecrequest_level;
+ uint16_t sadb_x_ipsecrequest_reserved1;
+ uint32_t sadb_x_ipsecrequest_reqid;
+ uint32_t sadb_x_ipsecrequest_reserved2;
+} __attribute__((packed));
+
+struct sadb_x_nat_t_type {
+ uint16_t sadb_x_nat_t_type_len;
+ uint16_t sadb_x_nat_t_type_exttype;
+ uint8_t sadb_x_nat_t_type_type;
+ uint8_t sadb_x_nat_t_type_reserved[3];
+} __attribute__((packed));
+
+struct sadb_x_nat_t_port {
+ uint16_t sadb_x_nat_t_port_len;
+ uint16_t sadb_x_nat_t_port_exttype;
+ uint16_t sadb_x_nat_t_port_port;
+ uint16_t sadb_x_nat_t_port_reserved;
+} __attribute__((packed));
+
+struct sadb_x_sec_ctx {
+ uint16_t sadb_x_sec_len;
+ uint16_t sadb_x_sec_exttype;
+ uint8_t sadb_x_ctx_alg;
+ uint8_t sadb_x_ctx_doi;
+ uint16_t sadb_x_ctx_len;
+} __attribute__((packed));
+
+#define SADB_RESERVED 0
+#define SADB_GETSPI 1
+#define SADB_UPDATE 2
+#define SADB_ADD 3
+#define SADB_DELETE 4
+#define SADB_GET 5
+#define SADB_ACQUIRE 6
+#define SADB_REGISTER 7
+#define SADB_EXPIRE 8
+#define SADB_FLUSH 9
+#define SADB_DUMP 10
+#define SADB_X_PROMISC 11
+#define SADB_X_PCHANGE 12
+#define SADB_X_SPDUPDATE 13
+#define SADB_X_SPDADD 14
+#define SADB_X_SPDDELETE 15
+#define SADB_X_SPDGET 16
+#define SADB_X_SPDACQUIRE 17
+#define SADB_X_SPDDUMP 18
+#define SADB_X_SPDFLUSH 19
+#define SADB_X_SPDSETIDX 20
+#define SADB_X_SPDEXPIRE 21
+#define SADB_X_SPDDELETE2 22
+#define SADB_X_NAT_T_NEW_MAPPING 23
+#define SADB_MAX 23
+
+#define SADB_SAFLAGS_PFS 1
+#define SADB_SAFLAGS_NOPMTUDISC 0x20000000
+#define SADB_SAFLAGS_DECAP_DSCP 0x40000000
+#define SADB_SAFLAGS_NOECN 0x80000000
+
+#define SADB_SASTATE_LARVAL 0
+#define SADB_SASTATE_MATURE 1
+#define SADB_SASTATE_DYING 2
+#define SADB_SASTATE_DEAD 3
+#define SADB_SASTATE_MAX 3
+
+#define SADB_SATYPE_UNSPEC 0
+#define SADB_SATYPE_AH 2
+#define SADB_SATYPE_ESP 3
+#define SADB_SATYPE_RSVP 5
+#define SADB_SATYPE_OSPFV2 6
+#define SADB_SATYPE_RIPV2 7
+#define SADB_SATYPE_MIP 8
+#define SADB_X_SATYPE_IPCOMP 9
+#define SADB_SATYPE_MAX 9
+
+#define SADB_AALG_NONE 0
+#define SADB_AALG_MD5HMAC 2
+#define SADB_AALG_SHA1HMAC 3
+#define SADB_X_AALG_SHA2_256HMAC 5
+#define SADB_X_AALG_SHA2_384HMAC 6
+#define SADB_X_AALG_SHA2_512HMAC 7
+#define SADB_X_AALG_RIPEMD160HMAC 8
+#define SADB_X_AALG_NULL 251  
+#define SADB_AALG_MAX 251
+
+#define SADB_EALG_NONE 0
+#define SADB_EALG_DESCBC 2
+#define SADB_EALG_3DESCBC 3
+#define SADB_X_EALG_CASTCBC 6
+#define SADB_X_EALG_BLOWFISHCBC 7
+#define SADB_EALG_NULL 11
+#define SADB_X_EALG_AESCBC 12
+#define SADB_EALG_MAX 253  
+
+#define SADB_X_EALG_SERPENTCBC 252  
+#define SADB_X_EALG_TWOFISHCBC 253  
+
+#define SADB_X_CALG_NONE 0
+#define SADB_X_CALG_OUI 1
+#define SADB_X_CALG_DEFLATE 2
+#define SADB_X_CALG_LZS 3
+#define SADB_X_CALG_LZJH 4
+#define SADB_X_CALG_MAX 4
+
+#define SADB_EXT_RESERVED 0
+#define SADB_EXT_SA 1
+#define SADB_EXT_LIFETIME_CURRENT 2
+#define SADB_EXT_LIFETIME_HARD 3
+#define SADB_EXT_LIFETIME_SOFT 4
+#define SADB_EXT_ADDRESS_SRC 5
+#define SADB_EXT_ADDRESS_DST 6
+#define SADB_EXT_ADDRESS_PROXY 7
+#define SADB_EXT_KEY_AUTH 8
+#define SADB_EXT_KEY_ENCRYPT 9
+#define SADB_EXT_IDENTITY_SRC 10
+#define SADB_EXT_IDENTITY_DST 11
+#define SADB_EXT_SENSITIVITY 12
+#define SADB_EXT_PROPOSAL 13
+#define SADB_EXT_SUPPORTED_AUTH 14
+#define SADB_EXT_SUPPORTED_ENCRYPT 15
+#define SADB_EXT_SPIRANGE 16
+#define SADB_X_EXT_KMPRIVATE 17
+#define SADB_X_EXT_POLICY 18
+#define SADB_X_EXT_SA2 19
+
+#define SADB_X_EXT_NAT_T_TYPE 20
+#define SADB_X_EXT_NAT_T_SPORT 21
+#define SADB_X_EXT_NAT_T_DPORT 22
+#define SADB_X_EXT_NAT_T_OA 23
+#define SADB_X_EXT_SEC_CTX 24
+#define SADB_EXT_MAX 24
+
+#define SADB_IDENTTYPE_RESERVED 0
+#define SADB_IDENTTYPE_PREFIX 1
+#define SADB_IDENTTYPE_FQDN 2
+#define SADB_IDENTTYPE_USERFQDN 3
+#define SADB_IDENTTYPE_MAX 3
+
+#endif