/* * Copyright (c) 1982, 1986, 1993 *The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * * This product includes software developed by the University of * California, Berkeley and its contributors. * * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * */ #ifndef NETINET_TCP_H #define NETINET_TCP_H #include typedef uint32_t tcp_seq; struct tcphdr { uint16_t th_sport; /* src port */ uint16_t th_dport; /* dest. port */ tcp_seq th_seq; /* seq number */ tcp_seq th_ack; /* ack number */ #if B_HOST_IS_BENDIAN uint8_t th_off:4, th_x2:4; #else uint8_t th_x2:4, /* unused */ th_off:4; /* data offset */ #endif uint8_t th_flags; /* ACK, FIN, PUSH, RST, SYN, URG */ uint16_t th_win; /* advertised window */ uint16_t th_sum; /* checksum */ uint16_t th_urp; /* urgent offset */ } _PACKED; #define TH_FIN 0x01 #define TH_SYN 0x02 #define TH_RST 0x04 #define TH_PUSH 0x08 #define TH_ACK 0x10 #define TH_URG 0x20 #define TCPOPT_EOL 0 #define TCPOPT_NOP 1 #define TCPOPT_MAXSEG 2 #define TCPOPT_WINDOW 3 #define TCPOPT_SACK_PERMITTED 4 /* Experimental */ #define TCPOPT_SACK 5 /* Experimental */ #define TCPOPT_TIMESTAMP 8 #define TCPOPT_SIGNATURE 19 #define MAX_TCPOPTLEN 40 /* Absolute maximum TCP options len */ #define TCPOLEN_MAXSEG 4 #define TCPOLEN_WINDOW 3 #define TCPOLEN_SACK 8 /* 2*sizeof(tcp_seq) */ #define TCPOLEN_SACK_PERMITTED 2 #define TCPOLEN_TIMESTAMP 10 #define TCPOLEN_TSTAMP_APPA (TCPOLEN_TIMESTAMP+2) /* appendix A */ #define TCPOLEN_SIGNATURE 18 #define TCPOPT_TSTAMP_HDR \ (TCPOPT_NOP<<24|TCPOPT_NOP<<16|TCPOPT_TIMESTAMP<<8|TCPOLEN_TIMESTAMP) #define TCP_MSS 512 #define TCP_MAXWIN 65535 #define TCP_MAX_WINSHIFT 14 #endif /* NETINET_TCP_H */