From 0e9be0d902b44894ed747cabb82ea2120f2e4b45 Mon Sep 17 00:00:00 2001 From: Mosder Date: Fri, 10 Jul 2026 22:50:12 +0200 Subject: feat: added functionallity for TCP stream reassembly --- analyzer/utils/tcp_seq_math.c | 41 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 41 insertions(+) create mode 100644 analyzer/utils/tcp_seq_math.c (limited to 'analyzer/utils/tcp_seq_math.c') diff --git a/analyzer/utils/tcp_seq_math.c b/analyzer/utils/tcp_seq_math.c new file mode 100644 index 0000000..272cb5a --- /dev/null +++ b/analyzer/utils/tcp_seq_math.c @@ -0,0 +1,41 @@ +#include "tcp_seq_math.h" + +int seq_after(uint32_t a, uint32_t b) { + return (int32_t)(a - b) > 0; +} + +int seq_before(uint32_t a, uint32_t b) { + return (int32_t)(a - b) < 0; +} + +int seq_after_eq(uint32_t a, uint32_t b) { + return (int32_t)(a - b) >= 0; +} + +int seq_before_eq(uint32_t a, uint32_t b) { + return (int32_t)(a - b) <= 0; +} + +int seq_in_range_ii(uint32_t value, uint32_t range_start, uint32_t range_end) { + int after_eq = seq_after_eq(value, range_start); + int before_eq = seq_before_eq(value, range_end); + return after_eq && before_eq; +} + +int seq_in_range_ee(uint32_t value, uint32_t range_start, uint32_t range_end) { + int after = seq_after(value, range_start); + int before = seq_before(value, range_end); + return after && before; +} + +int seq_in_range_ie(uint32_t value, uint32_t range_start, uint32_t range_end) { + int after_eq = seq_after_eq(value, range_start); + int before = seq_before(value, range_end); + return after_eq && before; +} + +int seq_in_range_ei(uint32_t value, uint32_t range_start, uint32_t range_end) { + int after = seq_after(value, range_start); + int before_eq = seq_before_eq(value, range_end); + return after && before_eq; +} -- cgit v1.2.3