feat: added functionallity for TCP stream reassembly

1 files changed, 0 insertions, 56 deletions

diff --git a/analyzer/utils/pcap.h b/analyzer/utils/pcap.h
deleted file mode 100644
index 10f01f1..0000000
--- a/analyzer/utils/pcap.h
+++ /dev/null
@@ -1,56 +0,0 @@
-// utils/pcap.h
-// helper functions for usage of libpcap and for handling TCP segments in general
-
-#include <pcap.h>
-
-#include "hashmap.h"
-
-typedef unsigned char byte_t;
-
-// get payload from a TCP/IP packet
-// params:
-//      - packet - captured packet
-//      - packet_data - metadata about packet
-//      - payload_len - pointer to save the payload length to or -1 if not a correct packet
-//      - tcp_seq - pointer to save the TCP sequence number
-// returns:
-//      pointer to the payload or NULL if not a correct packet
-extern const byte_t *get_payload_from_packet(const byte_t *packet, const struct pcap_pkthdr *packet_data, int *payload_len, uint32_t *tcp_seq);
-
-// struct to persistently store pending payloads
-typedef struct {
-    byte_t *payload;
-    int payload_len;
-} PendingPayload;
-
-// store persistently and return a PendingPayload, the payload is malloced and needs to be freed
-// params:
-//      - payload - payload to store
-//      - payload_len - length of the payload to store
-// returns:
-//      PendingPayload struct with stored payload
-extern PendingPayload new_pending(const byte_t *payload, int payload_len);
-
-// remove parsed part of the stream from memory and return only unparsed part
-// params:
-//      - stream - stream to free a part of
-//      - stream_seq - pointer to the current TCP sequence number at the beginning of the stream, updated to the new one in the function
-//      - stream_len - pointer to the current stream length, updated to the new length in the function
-//      - parsed_len - count of n first bytes of the stream that were parsed
-// returns:
-//      pointer to the new, reduced stream
-extern byte_t *free_parsed_data(byte_t *stream, uint32_t stream_seq, int stream_len, int parsed_len);
-
-// add TCP segment to stream
-// params:
-//      - stream - current stream
-//      - stream_seq - TCP sequence number at the beginning of the stream
-//      - stream_len - current length of the stream
-//      - payload - payload to add to stream
-//      - payload_seq - payload TCP sequence number
-//      - payload_len - length of the payload
-//      - pending - hashmap (seq -> PendingPayload) of pending payloads to be added to stream
-// returns:
-//      1 if the payload was added to the stream, 0 if it was discarded or saved to pending
-extern int
-add_segment_to_stream(byte_t *stream, uint32_t stream_seq, int stream_len, const byte_t *payload, uint32_t payload_seq, int payload_len, HashMap *pending);