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63 lines
1.7 KiB
C
63 lines
1.7 KiB
C
#pragma once
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#include "checksum.h"
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#include <stdint.h>
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#include <stdbool.h>
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#include <netinet/ip.h>
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#include <netinet/ip6.h>
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#include <netinet/tcp.h>
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#include <netinet/in.h>
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#include <sys/socket.h>
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// returns netorder value
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uint32_t net32_add(uint32_t netorder_value, uint32_t cpuorder_increment);
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#define TCP_FOOL_NONE 0
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#define TCP_FOOL_MD5SIG 1
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#define TCP_FOOL_BADSUM 2
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#define TCP_FOOL_TS 4
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#define TCP_FOOL_BADSEQ 8
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// seq and wsize have network byte order
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bool prepare_tcp_segment4(
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const struct sockaddr_in *src, const struct sockaddr_in *dst,
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uint8_t tcp_flags,
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uint32_t seq, uint32_t ack_seq,
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uint16_t wsize,
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uint32_t *timestamps,
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uint8_t ttl,
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uint8_t fooling,
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const void *data, uint16_t len,
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char *buf, size_t *buflen);
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bool prepare_tcp_segment6(
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const struct sockaddr_in6 *src, const struct sockaddr_in6 *dst,
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uint8_t tcp_flags,
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uint32_t seq, uint32_t ack_seq,
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uint16_t wsize,
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uint32_t *timestamps,
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uint8_t ttl,
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uint8_t fooling,
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const void *data, uint16_t len,
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char *buf, size_t *buflen);
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bool prepare_tcp_segment(
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const struct sockaddr *src, const struct sockaddr *dst,
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uint8_t tcp_flags,
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uint32_t seq, uint32_t ack_seq,
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uint16_t wsize,
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uint32_t *timestamps,
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uint8_t ttl,
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uint8_t fooling,
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const void *data, uint16_t len,
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char *buf, size_t *buflen);
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void extract_endpoints(const struct iphdr *iphdr,const struct ip6_hdr *ip6hdr,const struct tcphdr *tcphdr, struct sockaddr_storage *src, struct sockaddr_storage *dst);
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uint8_t *tcp_find_option(struct tcphdr *tcp, uint8_t kind);
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uint32_t *tcp_find_timestamps(struct tcphdr *tcp);
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// auto creates internal socket and uses it for subsequent calls
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bool rawsend(struct sockaddr* dst,uint32_t fwmark,const void *data,size_t len);
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// cleans up socket autocreated by rawsend
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void rawsend_cleanup();
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