github-mirror/zapret
1
0
Fork 0
mirror of https://github.com/bol-van/zapret.git synced 2026-03-16 02:02:03 +00:00
Code Issues Packages Projects Releases Wiki Activity

nfqws: udplen-pattern, hex string support

Browse Source
This commit is contained in:
bol-van
2023-09-07 13:41:25 +03:00
parent 9b112d9a28
commit 91ac09a8bd
18 changed files with 224 additions and 136 deletions
Download Patch File Download Diff File Expand all files Collapse all files

17
nfq/darkmagic.c
View File

@@ -299,6 +299,7 @@ bool prepare_udp_segment4(
const struct sockaddr_in *src, const struct sockaddr_in *dst,
uint8_t ttl,
uint8_t fooling,
const uint8_t *padding, size_t padding_size,
int padlen,
const void *data, uint16_t len,
uint8_t *buf, size_t *buflen)
@@ -324,7 +325,10 @@ bool prepare_udp_segment4(
fill_udphdr(udp, src->sin_port, dst->sin_port, datalen);
memcpy(payload,data,len);
memset(payload+len,0,padlen);
if (padding)
fill_pattern(payload+len,padlen,padding,padding_size);
else
memset(payload+len,0,padlen);
udp4_fix_checksum(udp,ip_payload_len,&ip->ip_src,&ip->ip_dst);
if (fooling & FOOL_BADSUM) udp->uh_sum^=htons(0xBEAF);
@@ -335,6 +339,7 @@ bool prepare_udp_segment6(
const struct sockaddr_in6 *src, const struct sockaddr_in6 *dst,
uint8_t ttl,
uint8_t fooling,
const uint8_t *padding, size_t padding_size,
int padlen,
const void *data, uint16_t len,
uint8_t *buf, size_t *buflen)
@@ -408,7 +413,10 @@ bool prepare_udp_segment6(
fill_udphdr(udp, src->sin6_port, dst->sin6_port, datalen);
memcpy(payload,data,len);
memset(payload+len,0,padlen);
if (padding)
fill_pattern(payload+len,padlen,padding,padding_size);
else
memset(payload+len,0,padlen);
udp6_fix_checksum(udp,transport_payload_len,&ip6->ip6_src,&ip6->ip6_dst);
if (fooling & FOOL_BADSUM) udp->uh_sum^=htons(0xBEAF);
@@ -419,14 +427,15 @@ bool prepare_udp_segment(
const struct sockaddr *src, const struct sockaddr *dst,
uint8_t ttl,
uint8_t fooling,
const uint8_t *padding, size_t padding_size,
int padlen,
const void *data, uint16_t len,
uint8_t *buf, size_t *buflen)
{
return (src->sa_family==AF_INET && dst->sa_family==AF_INET) ?
prepare_udp_segment4((struct sockaddr_in *)src,(struct sockaddr_in *)dst,ttl,fooling,padlen,data,len,buf,buflen) :
prepare_udp_segment4((struct sockaddr_in *)src,(struct sockaddr_in *)dst,ttl,fooling,padding,padding_size,padlen,data,len,buf,buflen) :
(src->sa_family==AF_INET6 && dst->sa_family==AF_INET6) ?
prepare_udp_segment6((struct sockaddr_in6 *)src,(struct sockaddr_in6 *)dst,ttl,fooling,padlen,data,len,buf,buflen) :
prepare_udp_segment6((struct sockaddr_in6 *)src,(struct sockaddr_in6 *)dst,ttl,fooling,padding,padding_size,padlen,data,len,buf,buflen) :
false;
}