c2e9275a9e
when a session is closed, use the packet manager to create a pseudo packet,
set the session to be closed as packet Exdata, and schedule it to the packet forwarding stage.
when the pseudo packet free, the session will be free.
64 lines
1.6 KiB
C
64 lines
1.6 KiB
C
#pragma once
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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#include <stdint.h>
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#include <stdbool.h>
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struct tcp_segment
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{
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uint32_t len;
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const void *data;
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};
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struct tcp_segment *tcp_segment_new(uint32_t seq, const void *data, uint32_t len);
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void tcp_segment_free(struct tcp_segment *seg);
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struct tcp_reassembly *tcp_reassembly_new(uint64_t max_timeout, uint64_t max_seg_num);
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void tcp_reassembly_free(struct tcp_reassembly *tcp_reass);
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/*
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* return: 1: push tcp segment success (segment overlap)
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* return: 0: push tcp segment success
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* return: -1: push tcp segment failed (no space)
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* return: -2: push tcp segment failed (segment repeat)
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*/
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int tcp_reassembly_push(struct tcp_reassembly *tcp_reass, struct tcp_segment *seg, uint64_t now);
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struct tcp_segment *tcp_reassembly_pop(struct tcp_reassembly *tcp_reass);
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struct tcp_segment *tcp_reassembly_expire(struct tcp_reassembly *tcp_reass, uint64_t now);
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void tcp_reassembly_inc_recv_next(struct tcp_reassembly *tcp_reass, uint32_t offset);
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void tcp_reassembly_set_recv_next(struct tcp_reassembly *tcp_reass, uint32_t seq);
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uint32_t tcp_reassembly_get_recv_next(struct tcp_reassembly *tcp_reass);
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/*
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* The next routines deal with comparing 32 bit unsigned ints
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* and worry about wraparound (automatic with unsigned arithmetic).
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*/
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static inline bool uint32_before(uint32_t seq1, uint32_t seq2)
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{
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return (int32_t)(seq1 - seq2) < 0;
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}
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static inline uint32_t uint32_add(uint32_t seq, uint32_t inc)
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{
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if (seq > UINT32_MAX - inc)
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{
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seq = ((uint64_t)seq + (uint64_t)inc) % (4294967296);
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}
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else
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{
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seq += inc;
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}
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return seq;
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}
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#ifdef __cplusplus
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}
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#endif
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