diff --git a/libc/kernel/common/linux/tcp.h b/libc/kernel/common/linux/tcp.h
new file mode 100644
index 0000000..3fa95f8
--- /dev/null
+++ b/libc/kernel/common/linux/tcp.h
@@ -0,0 +1,147 @@
+/****************************************************************************
+ ****************************************************************************
+ ***
+ ***   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_TCP_H
+#define _LINUX_TCP_H
+
+#include <linux/types.h>
+#include <asm/byteorder.h>
+
+struct tcphdr {
+ __u16 source;
+ __u16 dest;
+ __u32 seq;
+ __u32 ack_seq;
+#ifdef __LITTLE_ENDIAN_BITFIELD
+ __u16 res1:4,
+ doff:4,
+ fin:1,
+ syn:1,
+ rst:1,
+ psh:1,
+ ack:1,
+ urg:1,
+ ece:1,
+ cwr:1;
+#elif defined(__BIG_ENDIAN_BITFIELD)
+ __u16 doff:4,
+ res1:4,
+ cwr:1,
+ ece:1,
+ urg:1,
+ ack:1,
+ psh:1,
+ rst:1,
+ syn:1,
+ fin:1;
+#else
+#error "Adjust your <asm/byteorder.h> defines"
+#endif
+ __u16 window;
+ __u16 check;
+ __u16 urg_ptr;
+};
+
+union tcp_word_hdr {
+ struct tcphdr hdr;
+ __u32 words[5];
+};
+
+#define tcp_flag_word(tp) ( ((union tcp_word_hdr *)(tp))->words [3]) 
+
+enum {
+ TCP_FLAG_CWR = __constant_htonl(0x00800000),
+ TCP_FLAG_ECE = __constant_htonl(0x00400000),
+ TCP_FLAG_URG = __constant_htonl(0x00200000),
+ TCP_FLAG_ACK = __constant_htonl(0x00100000),
+ TCP_FLAG_PSH = __constant_htonl(0x00080000),
+ TCP_FLAG_RST = __constant_htonl(0x00040000),
+ TCP_FLAG_SYN = __constant_htonl(0x00020000),
+ TCP_FLAG_FIN = __constant_htonl(0x00010000),
+ TCP_RESERVED_BITS = __constant_htonl(0x0F000000),
+ TCP_DATA_OFFSET = __constant_htonl(0xF0000000)
+};
+
+#define TCP_NODELAY 1  
+#define TCP_MAXSEG 2  
+#define TCP_CORK 3  
+#define TCP_KEEPIDLE 4  
+#define TCP_KEEPINTVL 5  
+#define TCP_KEEPCNT 6  
+#define TCP_SYNCNT 7  
+#define TCP_LINGER2 8  
+#define TCP_DEFER_ACCEPT 9  
+#define TCP_WINDOW_CLAMP 10  
+#define TCP_INFO 11  
+#define TCP_QUICKACK 12  
+#define TCP_CONGESTION 13  
+
+#define TCPI_OPT_TIMESTAMPS 1
+#define TCPI_OPT_SACK 2
+#define TCPI_OPT_WSCALE 4
+#define TCPI_OPT_ECN 8
+
+enum tcp_ca_state
+{
+ TCP_CA_Open = 0,
+#define TCPF_CA_Open (1<<TCP_CA_Open)
+ TCP_CA_Disorder = 1,
+#define TCPF_CA_Disorder (1<<TCP_CA_Disorder)
+ TCP_CA_CWR = 2,
+#define TCPF_CA_CWR (1<<TCP_CA_CWR)
+ TCP_CA_Recovery = 3,
+#define TCPF_CA_Recovery (1<<TCP_CA_Recovery)
+ TCP_CA_Loss = 4
+#define TCPF_CA_Loss (1<<TCP_CA_Loss)
+};
+
+struct tcp_info
+{
+ __u8 tcpi_state;
+ __u8 tcpi_ca_state;
+ __u8 tcpi_retransmits;
+ __u8 tcpi_probes;
+ __u8 tcpi_backoff;
+ __u8 tcpi_options;
+ __u8 tcpi_snd_wscale : 4, tcpi_rcv_wscale : 4;
+
+ __u32 tcpi_rto;
+ __u32 tcpi_ato;
+ __u32 tcpi_snd_mss;
+ __u32 tcpi_rcv_mss;
+
+ __u32 tcpi_unacked;
+ __u32 tcpi_sacked;
+ __u32 tcpi_lost;
+ __u32 tcpi_retrans;
+ __u32 tcpi_fackets;
+
+ __u32 tcpi_last_data_sent;
+ __u32 tcpi_last_ack_sent;
+ __u32 tcpi_last_data_recv;
+ __u32 tcpi_last_ack_recv;
+
+ __u32 tcpi_pmtu;
+ __u32 tcpi_rcv_ssthresh;
+ __u32 tcpi_rtt;
+ __u32 tcpi_rttvar;
+ __u32 tcpi_snd_ssthresh;
+ __u32 tcpi_snd_cwnd;
+ __u32 tcpi_advmss;
+ __u32 tcpi_reordering;
+
+ __u32 tcpi_rcv_rtt;
+ __u32 tcpi_rcv_space;
+
+ __u32 tcpi_total_retrans;
+};
+
+#endif