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nfqws: n prefix for network byte order vars

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This commit is contained in:
bol-van 2021-03-21 11:51:38 +03:00
parent a9292cf4c2
commit 29b905c1a1
2 changed files with 22 additions and 21 deletions
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31
nfq/darkmagic.c
View File

@ -53,7 +53,8 @@ uint8_t tcp_find_scale_factor(const struct tcphdr *tcp)
return SCALE_NONE; return SCALE_NONE;
} }
static void fill_tcphdr(struct tcphdr *tcp, uint8_t tcp_flags, uint32_t seq, uint32_t ack_seq, uint8_t fooling, uint16_t nsport, uint16_t ndport, uint16_t nwsize, uint8_t scale_factor, uint32_t *timestamps) // n prefix (nsport, nwsize) means network byte order
static void fill_tcphdr(struct tcphdr *tcp, uint8_t fooling, uint8_t tcp_flags, uint32_t nseq, uint32_t nack_seq, uint16_t nsport, uint16_t ndport, uint16_t nwsize, uint8_t scale_factor, uint32_t *timestamps)
{ {
char *tcpopt = (char*)(tcp+1); char *tcpopt = (char*)(tcp+1);
uint8_t t=0; uint8_t t=0;
@ -63,13 +64,13 @@ static void fill_tcphdr(struct tcphdr *tcp, uint8_t tcp_flags, uint32_t seq, uin
tcp->th_dport = ndport; tcp->th_dport = ndport;
if (fooling & TCP_FOOL_BADSEQ) if (fooling & TCP_FOOL_BADSEQ)
{ {
tcp->th_seq = net32_add(seq,0x80000000); tcp->th_seq = net32_add(nseq,0x80000000);
tcp->th_ack = net32_add(ack_seq,0x80000000); tcp->th_ack = net32_add(nack_seq,0x80000000);
} }
else else
{ {
tcp->th_seq = seq; tcp->th_seq = nseq;
tcp->th_ack = ack_seq; tcp->th_ack = nack_seq;
} }
tcp->th_off = 5; tcp->th_off = 5;
*((uint8_t*)tcp+13)= tcp_flags; *((uint8_t*)tcp+13)= tcp_flags;
@ -335,8 +336,8 @@ bool rawsend(const struct sockaddr* dst,uint32_t fwmark,const void *data,size_t
bool prepare_tcp_segment4( bool prepare_tcp_segment4(
const struct sockaddr_in *src, const struct sockaddr_in *dst, const struct sockaddr_in *src, const struct sockaddr_in *dst,
uint8_t tcp_flags, uint8_t tcp_flags,
uint32_t seq, uint32_t ack_seq, uint32_t nseq, uint32_t nack_seq,
uint16_t wsize, uint16_t nwsize,
uint8_t scale_factor, uint8_t scale_factor,
uint32_t *timestamps, uint32_t *timestamps,
uint8_t ttl, uint8_t ttl,
@ -365,7 +366,7 @@ bool prepare_tcp_segment4(
ip->ip_src = src->sin_addr; ip->ip_src = src->sin_addr;
ip->ip_dst = dst->sin_addr; ip->ip_dst = dst->sin_addr;
fill_tcphdr(tcp,tcp_flags,seq,ack_seq,fooling,src->sin_port,dst->sin_port,wsize,scale_factor,timestamps); fill_tcphdr(tcp,fooling,tcp_flags,nseq,nack_seq,src->sin_port,dst->sin_port,nwsize,scale_factor,timestamps);
memcpy((char*)tcp+sizeof(struct tcphdr)+tcpoptlen,data,len); memcpy((char*)tcp+sizeof(struct tcphdr)+tcpoptlen,data,len);
tcp4_fix_checksum(tcp,sizeof(struct tcphdr)+tcpoptlen+len,&ip->ip_src,&ip->ip_dst); tcp4_fix_checksum(tcp,sizeof(struct tcphdr)+tcpoptlen+len,&ip->ip_src,&ip->ip_dst);
@ -379,8 +380,8 @@ bool prepare_tcp_segment4(
bool prepare_tcp_segment6( bool prepare_tcp_segment6(
const struct sockaddr_in6 *src, const struct sockaddr_in6 *dst, const struct sockaddr_in6 *src, const struct sockaddr_in6 *dst,
uint8_t tcp_flags, uint8_t tcp_flags,
uint32_t seq, uint32_t ack_seq, uint32_t nseq, uint32_t nack_seq,
uint16_t wsize, uint16_t nwsize,
uint8_t scale_factor, uint8_t scale_factor,
uint32_t *timestamps, uint32_t *timestamps,
uint8_t ttl, uint8_t ttl,
@ -407,7 +408,7 @@ bool prepare_tcp_segment6(
ip6->ip6_src = src->sin6_addr; ip6->ip6_src = src->sin6_addr;
ip6->ip6_dst = dst->sin6_addr; ip6->ip6_dst = dst->sin6_addr;
fill_tcphdr(tcp,tcp_flags,seq,ack_seq,fooling,src->sin6_port,dst->sin6_port,wsize,scale_factor,timestamps); fill_tcphdr(tcp,fooling,tcp_flags,nseq,nack_seq,src->sin6_port,dst->sin6_port,nwsize,scale_factor,timestamps);
memcpy((char*)tcp+sizeof(struct tcphdr)+tcpoptlen,data,len); memcpy((char*)tcp+sizeof(struct tcphdr)+tcpoptlen,data,len);
tcp6_fix_checksum(tcp,sizeof(struct tcphdr)+tcpoptlen+len,&ip6->ip6_src,&ip6->ip6_dst); tcp6_fix_checksum(tcp,sizeof(struct tcphdr)+tcpoptlen+len,&ip6->ip6_src,&ip6->ip6_dst);
@ -420,8 +421,8 @@ bool prepare_tcp_segment6(
bool prepare_tcp_segment( bool prepare_tcp_segment(
const struct sockaddr *src, const struct sockaddr *dst, const struct sockaddr *src, const struct sockaddr *dst,
uint8_t tcp_flags, uint8_t tcp_flags,
uint32_t seq, uint32_t ack_seq, uint32_t nseq, uint32_t nack_seq,
uint16_t wsize, uint16_t nwsize,
uint8_t scale_factor, uint8_t scale_factor,
uint32_t *timestamps, uint32_t *timestamps,
uint8_t ttl, uint8_t ttl,
@ -430,9 +431,9 @@ bool prepare_tcp_segment(
uint8_t *buf, size_t *buflen) uint8_t *buf, size_t *buflen)
{ {
return (src->sa_family==AF_INET && dst->sa_family==AF_INET) ? return (src->sa_family==AF_INET && dst->sa_family==AF_INET) ?
prepare_tcp_segment4((struct sockaddr_in *)src,(struct sockaddr_in *)dst,tcp_flags,seq,ack_seq,wsize,scale_factor,timestamps,ttl,fooling,data,len,buf,buflen) : prepare_tcp_segment4((struct sockaddr_in *)src,(struct sockaddr_in *)dst,tcp_flags,nseq,nack_seq,nwsize,scale_factor,timestamps,ttl,fooling,data,len,buf,buflen) :
(src->sa_family==AF_INET6 && dst->sa_family==AF_INET6) ? (src->sa_family==AF_INET6 && dst->sa_family==AF_INET6) ?
prepare_tcp_segment6((struct sockaddr_in6 *)src,(struct sockaddr_in6 *)dst,tcp_flags,seq,ack_seq,wsize,scale_factor,timestamps,ttl,fooling,data,len,buf,buflen) : prepare_tcp_segment6((struct sockaddr_in6 *)src,(struct sockaddr_in6 *)dst,tcp_flags,nseq,nack_seq,nwsize,scale_factor,timestamps,ttl,fooling,data,len,buf,buflen) :
false; false;
} }

12
nfq/darkmagic.h
View File

@ -25,8 +25,8 @@ uint32_t net32_add(uint32_t netorder_value, uint32_t cpuorder_increment);
bool prepare_tcp_segment4( bool prepare_tcp_segment4(
const struct sockaddr_in *src, const struct sockaddr_in *dst, const struct sockaddr_in *src, const struct sockaddr_in *dst,
uint8_t tcp_flags, uint8_t tcp_flags,
uint32_t seq, uint32_t ack_seq, uint32_t nseq, uint32_t nack_seq,
uint16_t wsize, uint16_t nwsize,
uint8_t scale_factor, uint8_t scale_factor,
uint32_t *timestamps, uint32_t *timestamps,
uint8_t ttl, uint8_t ttl,
@ -36,8 +36,8 @@ bool prepare_tcp_segment4(
bool prepare_tcp_segment6( bool prepare_tcp_segment6(
const struct sockaddr_in6 *src, const struct sockaddr_in6 *dst, const struct sockaddr_in6 *src, const struct sockaddr_in6 *dst,
uint8_t tcp_flags, uint8_t tcp_flags,
uint32_t seq, uint32_t ack_seq, uint32_t nseq, uint32_t nack_seq,
uint16_t wsize, uint16_t nwsize,
uint8_t scale_factor, uint8_t scale_factor,
uint32_t *timestamps, uint32_t *timestamps,
uint8_t ttl, uint8_t ttl,
@ -47,8 +47,8 @@ bool prepare_tcp_segment6(
bool prepare_tcp_segment( bool prepare_tcp_segment(
const struct sockaddr *src, const struct sockaddr *dst, const struct sockaddr *src, const struct sockaddr *dst,
uint8_t tcp_flags, uint8_t tcp_flags,
uint32_t seq, uint32_t ack_seq, uint32_t nseq, uint32_t nack_seq,
uint16_t wsize, uint16_t nwsize,
uint8_t scale_factor, uint8_t scale_factor,
uint32_t *timestamps, uint32_t *timestamps,
uint8_t ttl, uint8_t ttl,