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winws: --wf-tcp filter out empty ack

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bol-van 2024-12-13 18:49:11 +03:00
parent dcf78a76e5
commit 7b7a6dd154
1 changed files with 4 additions and 1 deletions
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5
nfq/nfqws.c
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@ -981,6 +981,7 @@ static bool wf_make_pf(char *opt, const char *l4, const char *portname, char *bu
#define DIVERT_NO_LOCALNETS_SRC "(" DIVERT_NO_LOCALNETSv4_SRC " or " DIVERT_NO_LOCALNETSv6_SRC ")"
#define DIVERT_NO_LOCALNETS_DST "(" DIVERT_NO_LOCALNETSv4_DST " or " DIVERT_NO_LOCALNETSv6_DST ")"
#define DIVERT_TCP_NOT_EMPTY "(!tcp or tcp.Syn or tcp.PayloadLength>0)"
#define DIVERT_TCP_INBOUNDS "(tcp.Ack and tcp.Syn or tcp.Rst or tcp.Fin)"
// HTTP/1.? 30(2|7)
@ -998,6 +999,7 @@ static bool wf_make_filter(
char pf_dst_buf[512],iface[64];
const char *pf_dst;
const char *f_tcpin = *pf_tcp_src ? dp_list_have_autohostlist(&params.desync_profiles) ? "(" DIVERT_TCP_INBOUNDS " or (" DIVERT_HTTP_REDIRECT "))" : DIVERT_TCP_INBOUNDS : "";
const char *f_tcp_not_empty = *pf_tcp_src ? DIVERT_TCP_NOT_EMPTY " and " : "";
snprintf(iface,sizeof(iface)," ifIdx=%u and subIfIdx=%u and",IfIdx,SubIfIdx);
@ -1010,9 +1012,10 @@ static bool wf_make_filter(
else
pf_dst = *pf_tcp_dst ? pf_tcp_dst : pf_udp_dst;
snprintf(wf,len,
DIVERT_PROLOG " and%s%s\n ((outbound and %s%s)\n or\n (inbound and tcp%s%s%s%s%s%s%s))",
DIVERT_PROLOG " and%s%s\n ((outbound and %s%s%s)\n or\n (inbound and tcp%s%s%s%s%s%s%s))",
IfIdx ? iface : "",
ipv4 ? ipv6 ? "" : " ip and" : " ipv6 and",
f_tcp_not_empty,
pf_dst,
ipv4 ? ipv6 ? " and " DIVERT_NO_LOCALNETS_DST : " and " DIVERT_NO_LOCALNETSv4_DST : " and " DIVERT_NO_LOCALNETSv6_DST,
*pf_tcp_src ? "" : " and false",