diff options
Diffstat (limited to 'include/netinet/ip_tcp.h')
| -rw-r--r-- | include/netinet/ip_tcp.h | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/include/netinet/ip_tcp.h b/include/netinet/ip_tcp.h new file mode 100644 index 000000000..39111f275 --- /dev/null +++ b/include/netinet/ip_tcp.h @@ -0,0 +1,72 @@ +/* + * Copyright (c) 1982, 1986 Regents of the University of California. + * All rights reserved. + * + * Redistribution and use in source and binary forms are permitted + * provided that the above copyright notice and this paragraph are + * duplicated in all such forms and that any documentation, + * advertising materials, and other materials related to such + * distribution and use acknowledge that the software was developed + * by the University of California, Berkeley. The name of the + * University may not be used to endorse or promote products derived + * from this software without specific prior written permission. + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED + * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. + * + * @(#)tcp.h 7.5 (Berkeley) 6/29/88 + */ + +#ifndef _NETINET_IP_TCP_H +#define _NETINET_IP_TCP_H + +#include <endian.h> +#include <linux/socket.h> +#include <sys/types.h> + +typedef u_long tcp_seq; +/* + * TCP header. + * Per RFC 793, September, 1981. + */ +struct tcphdr { + u_short th_sport; /* source port */ + u_short th_dport; /* destination port */ + tcp_seq th_seq; /* sequence number */ + tcp_seq th_ack; /* acknowledgement number */ +#if __BYTE_ORDER == __LITTLE_ENDIAN + u_char th_x2:4, /* (unused) */ + th_off:4; /* data offset */ +#endif +#if __BYTE_ORDER == __BIG_ENDIAN + u_char th_off:4, /* data offset */ + th_x2:4; /* (unused) */ +#endif + u_char th_flags; +#define TH_FIN 0x01 +#define TH_SYN 0x02 +#define TH_RST 0x04 +#define TH_PUSH 0x08 +#define TH_ACK 0x10 +#define TH_URG 0x20 + u_short th_win; /* window */ + u_short th_sum; /* checksum */ + u_short th_urp; /* urgent pointer */ +}; + +#define TCPOPT_EOL 0 +#define TCPOPT_NOP 1 +#define TCPOPT_MAXSEG 2 + +/* + * Default maximum segment size for TCP. + * With an IP MSS of 576, this is 536, + * but 512 is probably more convenient. + */ +#ifdef lint +#define TCP_MSS 536 +#else +#define TCP_MSS MIN(512, IP_MSS - sizeof (struct tcpiphdr)) +#endif + +#endif /* _NETINET_TCP_H */ |