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115 lines
3.0 KiB
C
115 lines
3.0 KiB
C
/**
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* Destiny TCP header
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*
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* Copyright (C) 2013 INRIA.
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*
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* This file subject to the terms and conditions of the GNU Lesser General
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* Public License. See the file LICENSE in the top level directory for more
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* details.
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*
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* @ingroup destiny
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* @{
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* @file tcp.c
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* @brief TCP data structs and prototypes
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* @author Oliver Gesch <oliver.gesch@googlemail.com>
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* @}
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*/
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#ifndef TCP_H_
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#define TCP_H_
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#define TCP_HDR_LEN 20
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#define TCP_EOO_OPTION 0x00 // End of option list
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#define TCP_NOP_OPTION 0x01 // No operation
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#define TCP_MSS_OPTION 0x02 // Maximum segment size
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#define TCP_WSF_OPTION 0x03 // Window scale factor
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#define TCP_TS_OPTION 0x08 // Timestamp
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enum tcp_flags {
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TCP_ACK = 0x08,
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TCP_URG_PSH = 0x14,
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TCP_RST = 0x20,
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TCP_SYN = 0x40,
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TCP_SYN_ACK = 0x48,
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TCP_FIN = 0x80,
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TCP_FIN_ACK = 0x88
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};
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enum tcp_states {
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CLOSED = 0,
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LISTEN = 1,
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SYN_SENT = 2,
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SYN_RCVD = 3,
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ESTABLISHED = 4,
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FIN_WAIT_1 = 5,
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FIN_WAIT_2 = 6,
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CLOSE_WAIT = 7,
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CLOSING = 8,
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LAST_ACK = 9,
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TIME_WAIT = 10,
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UNKNOWN = 11
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};
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enum tcp_codes {
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UNDEFINED = 0,
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PACKET_OK = 1,
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CLOSE_CONN = 2,
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SEQ_NO_TOO_SMALL = 3,
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ACK_NO_TOO_SMALL = 4,
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ACK_NO_TOO_BIG = 5
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};
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#define REMOVE_RESERVED 0xFC
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#define IS_TCP_ACK(a) ((a & TCP_ACK) == TCP_ACK) // Test for ACK flag only, ignore URG und PSH flag
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#define IS_TCP_RST(a) ((a & TCP_RST) == TCP_RST)
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#define IS_TCP_SYN(a) ((a & TCP_SYN) == TCP_SYN)
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#define IS_TCP_SYN_ACK(a) ((a & TCP_SYN_ACK) == TCP_SYN_ACK)
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#define IS_TCP_FIN(a) ((a & TCP_FIN) == TCP_FIN)
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#define IS_TCP_FIN_ACK(a) ((a & TCP_FIN_ACK) == TCP_FIN_ACK)
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#define SET_TCP_ACK(a) a = ((a & 0x00) | TCP_ACK)
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#define SET_TCP_RST(a) a = ((a & 0x00) | TCP_RST)
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#define SET_TCP_SYN(a) a = ((a & 0x00) | TCP_SYN)
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#define SET_TCP_SYN_ACK(a) a = ((a & 0x00) | TCP_SYN_ACK)
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#define SET_TCP_FIN(a) a = ((a & 0x00) | TCP_FIN)
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#define SET_TCP_FIN_ACK(a) a = ((a & 0x00) | TCP_FIN_ACK)
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#define TCP_STACK_SIZE 1024
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#include "../sixlowpan/sixlowip.h"
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typedef struct __attribute__((packed)) tcp_mms_o_t {
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uint8_t kind;
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uint8_t len;
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uint16_t mss;
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} tcp_mss_option_t;
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typedef struct __attribute__((packed)) tcp_h_t {
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uint16_t src_port;
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uint16_t dst_port;
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uint32_t seq_nr;
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uint32_t ack_nr;
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uint8_t dataOffset_reserved;
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uint8_t reserved_flags;
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uint16_t window;
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uint16_t checksum;
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uint16_t urg_pointer;
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} tcp_hdr_t;
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#ifdef TCP_HC
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mutex_t global_context_counter_mutex;
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uint8_t global_context_counter;
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#endif
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mutex_t global_sequence_clunter_mutex;
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uint32_t global_sequence_counter;
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void tcp_packet_handler(void);
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uint16_t tcp_csum(ipv6_hdr_t *ipv6_header, tcp_hdr_t *tcp_header);
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void printTCPHeader(tcp_hdr_t *tcp_header);
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void printArrayRange_tcp(uint8_t *udp_header, uint16_t len);
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#endif /* TCP_H_ */
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