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nfqws: udp protocol desync

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bol-van
2022-01-01 20:22:04 +03:00
parent 566e3d1536
commit 65830eb665
21 changed files with 1048 additions and 736 deletions
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45
nfq/darkmagic.h
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@@ -7,17 +7,18 @@
#include <netinet/ip.h>
#include <netinet/ip6.h>
#include <netinet/tcp.h>
#include <netinet/udp.h>
#include <netinet/in.h>
#include <sys/socket.h>
// returns netorder value
uint32_t net32_add(uint32_t netorder_value, uint32_t cpuorder_increment);
#define TCP_FOOL_NONE 0
#define TCP_FOOL_MD5SIG 1
#define TCP_FOOL_BADSUM 2
#define TCP_FOOL_TS 4
#define TCP_FOOL_BADSEQ 8
#define FOOL_NONE 0
#define FOOL_MD5SIG 1
#define FOOL_BADSUM 2
#define FOOL_TS 4
#define FOOL_BADSEQ 8
#define SCALE_NONE ((uint8_t)-1)
@@ -62,7 +63,29 @@ bool prepare_tcp_segment(
const void *data, uint16_t len,
uint8_t *buf, size_t *buflen);
void extract_endpoints(const struct ip *ip,const struct ip6_hdr *ip6hdr,const struct tcphdr *tcphdr, struct sockaddr_storage *src, struct sockaddr_storage *dst);
bool prepare_udp_segment4(
const struct sockaddr_in *src, const struct sockaddr_in *dst,
uint8_t ttl,
uint8_t fooling,
const void *data, uint16_t len,
uint8_t *buf, size_t *buflen);
bool prepare_udp_segment6(
const struct sockaddr_in6 *src, const struct sockaddr_in6 *dst,
uint8_t ttl,
uint8_t fooling,
const void *data, uint16_t len,
uint8_t *buf, size_t *buflen);
bool prepare_udp_segment(
const struct sockaddr *src, const struct sockaddr *dst,
uint8_t ttl,
uint8_t fooling,
const void *data, uint16_t len,
uint8_t *buf, size_t *buflen);
void extract_ports(const struct tcphdr *tcphdr, const struct udphdr *udphdr, uint8_t *proto, uint16_t *sport, uint16_t *dport);
void extract_endpoints(const struct ip *ip,const struct ip6_hdr *ip6hdr,const struct tcphdr *tcphdr,const struct udphdr *udphdr, struct sockaddr_storage *src, struct sockaddr_storage *dst);
uint8_t *tcp_find_option(struct tcphdr *tcp, uint8_t kind);
uint32_t *tcp_find_timestamps(struct tcphdr *tcp);
uint8_t tcp_find_scale_factor(const struct tcphdr *tcp);
@@ -74,17 +97,21 @@ bool rawsend_preinit(uint32_t fwmark);
// cleans up socket autocreated by rawsend
void rawsend_cleanup();
const char *proto_name(uint8_t proto);
uint16_t family_from_proto(uint8_t l3proto);
void print_ip(const struct ip *ip);
void print_ip6hdr(const struct ip6_hdr *ip6hdr, uint8_t proto);
void print_tcphdr(const struct tcphdr *tcphdr);
void print_udphdr(const struct udphdr *udphdr);
bool proto_check_ipv4(const uint8_t *data, size_t len);
void proto_skip_ipv4(uint8_t **data, size_t *len);
bool proto_check_tcp(const uint8_t *data, size_t len);
void proto_skip_tcp(uint8_t **data, size_t *len);
bool proto_check_ipv6(const uint8_t *data, size_t len);
void proto_skip_ipv6(uint8_t **data, size_t *len, uint8_t *proto_type);
bool proto_check_tcp(const uint8_t *data, size_t len);
void proto_skip_tcp(uint8_t **data, size_t *len);
bool proto_check_udp(const uint8_t *data, size_t len);
void proto_skip_udp(uint8_t **data, size_t *len);
bool tcp_synack_segment(const struct tcphdr *tcphdr);
bool tcp_syn_segment(const struct tcphdr *tcphdr);