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nfqws: separate ipv4/6 ttl setting

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bol-van
2021-12-10 22:08:52 +03:00
parent e926172ed8
commit 545c9a4730
12 changed files with 32 additions and 23 deletions
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3
nfq/desync.c
View File

@@ -163,7 +163,8 @@ packet_process_result dpi_desync_packet(uint8_t *data_pkt, size_t len_pkt, struc
if (params.desync_mode0!=DESYNC_NONE || params.desync_mode!=DESYNC_NONE) // save some cpu
{
ttl_orig = ip ? ip->ip_ttl : ip6hdr->ip6_ctlun.ip6_un1.ip6_un1_hlim;
ttl_fake = params.desync_ttl ? params.desync_ttl : ttl_orig;
if (ip6hdr) ttl_fake = params.desync_ttl6 ? params.desync_ttl6 : ttl_orig;
else ttl_fake = params.desync_ttl ? params.desync_ttl : ttl_orig;
flags_orig = *((uint8_t*)tcphdr+13);
scale_factor = tcp_find_scale_factor(tcphdr);
timestamps = tcp_find_timestamps(tcphdr);

48
nfq/nfqws.c
View File

@@ -486,6 +486,7 @@ static void exithelp()
" --dpi-desync-sockarg=<int|0xHEX>\t; override sockarg (SO_USER_COOKIE) for desync packet. default = 0x%08X (%u)\n"
#endif
" --dpi-desync-ttl=<int>\t\t\t; set ttl for desync packet\n"
" --dpi-desync-ttl6=<int>\t\t; set ipv6 hop limit for desync packet. by default ttl value is used.\n"
" --dpi-desync-fooling=<mode>[,<mode>]\t; can use multiple comma separated values. modes : none md5sig ts badseq badsum\n"
#ifdef __linux__
" --dpi-desync-retrans=0|1\t\t; 0(default)=reinject original data packet after fake 1=drop original data packet to force its retransmission\n"
@@ -552,6 +553,7 @@ int main(int argc, char **argv)
params.ctrack_t_syn = CTRACK_T_SYN;
params.ctrack_t_est = CTRACK_T_EST;
params.ctrack_t_fin = CTRACK_T_FIN;
params.desync_ttl6 = 0xFF; // unused
if (can_drop_root()) // are we root ?
{
@@ -589,16 +591,17 @@ int main(int argc, char **argv)
{"disabled_argument_2",no_argument,0,0}, // optidx=15
#endif
{"dpi-desync-ttl",required_argument,0,0}, // optidx=16
{"dpi-desync-fooling",required_argument,0,0}, // optidx=17
{"dpi-desync-retrans",optional_argument,0,0}, // optidx=18
{"dpi-desync-repeats",required_argument,0,0}, // optidx=19
{"dpi-desync-skip-nosni",optional_argument,0,0},// optidx=20
{"dpi-desync-split-pos",required_argument,0,0},// optidx=21
{"dpi-desync-any-protocol",optional_argument,0,0},// optidx=22
{"dpi-desync-fake-http",required_argument,0,0},// optidx=23
{"dpi-desync-fake-tls",required_argument,0,0},// optidx=24
{"dpi-desync-cutoff",required_argument,0,0},// optidx=25
{"hostlist",required_argument,0,0}, // optidx=26
{"dpi-desync-ttl6",required_argument,0,0}, // optidx=17
{"dpi-desync-fooling",required_argument,0,0}, // optidx=18
{"dpi-desync-retrans",optional_argument,0,0}, // optidx=19
{"dpi-desync-repeats",required_argument,0,0}, // optidx=20
{"dpi-desync-skip-nosni",optional_argument,0,0},// optidx=21
{"dpi-desync-split-pos",required_argument,0,0},// optidx=22
{"dpi-desync-any-protocol",optional_argument,0,0},// optidx=23
{"dpi-desync-fake-http",required_argument,0,0},// optidx=24
{"dpi-desync-fake-tls",required_argument,0,0},// optidx=25
{"dpi-desync-cutoff",required_argument,0,0},// optidx=26
{"hostlist",required_argument,0,0}, // optidx=27
{NULL,0,NULL,0}
};
if (argc < 2) exithelp();
@@ -754,7 +757,10 @@ int main(int argc, char **argv)
case 16: /* dpi-desync-ttl */
params.desync_ttl = (uint8_t)atoi(optarg);
break;
case 17: /* dpi-desync-fooling */
case 17: /* dpi-desync-ttl6 */
params.desync_ttl6 = (uint8_t)atoi(optarg);
break;
case 18: /* dpi-desync-fooling */
{
char *e,*p = optarg;
while (p)
@@ -783,7 +789,7 @@ int main(int argc, char **argv)
}
}
break;
case 18: /* dpi-desync-retrans */
case 19: /* dpi-desync-retrans */
#ifdef __linux__
params.desync_retrans = !optarg || atoi(optarg);
#else
@@ -791,7 +797,7 @@ int main(int argc, char **argv)
exit_clean(1);
#endif
break;
case 19: /* dpi-desync-repeats */
case 20: /* dpi-desync-repeats */
params.desync_repeats = atoi(optarg);
if (params.desync_repeats<=0 || params.desync_repeats>20)
{
@@ -799,10 +805,10 @@ int main(int argc, char **argv)
exit_clean(1);
}
break;
case 20: /* dpi-desync-skip-nosni */
case 21: /* dpi-desync-skip-nosni */
params.desync_skip_nosni = !optarg || atoi(optarg);
break;
case 21: /* dpi-desync-split-pos */
case 22: /* dpi-desync-split-pos */
params.desync_split_pos = atoi(optarg);
if (params.desync_split_pos<1 || params.desync_split_pos>DPI_DESYNC_MAX_FAKE_LEN)
{
@@ -810,10 +816,10 @@ int main(int argc, char **argv)
exit_clean(1);
}
break;
case 22: /* dpi-desync-any-protocol */
case 23: /* dpi-desync-any-protocol */
params.desync_any_proto = !optarg || atoi(optarg);
break;
case 23: /* dpi-desync-fake-http */
case 24: /* dpi-desync-fake-http */
params.fake_http_size = sizeof(params.fake_http);
if (!load_file_nonempty(optarg,params.fake_http,&params.fake_http_size))
{
@@ -821,7 +827,7 @@ int main(int argc, char **argv)
exit_clean(1);
}
break;
case 24: /* dpi-desync-fake-tls */
case 25: /* dpi-desync-fake-tls */
params.fake_tls_size = sizeof(params.fake_tls);
if (!load_file_nonempty(optarg,params.fake_tls,&params.fake_tls_size))
{
@@ -829,14 +835,14 @@ int main(int argc, char **argv)
exit_clean(1);
}
break;
case 25: /* desync-cutoff */
case 26: /* desync-cutoff */
if (!sscanf(optarg, "%u", &params.desync_cutoff))
{
fprintf(stderr, "invalid desync-cutoff value\n");
exit_clean(1);
}
break;
case 26: /* hostlist */
case 27: /* hostlist */
if (!LoadHostList(&params.hostlist, optarg))
exit_clean(1);
strncpy(params.hostfile,optarg,sizeof(params.hostfile));
@@ -844,6 +850,8 @@ int main(int argc, char **argv)
break;
}
}
// not specified - use desync_ttl value instead
if (params.desync_ttl6 == 0xFF) params.desync_ttl6=params.desync_ttl;
#ifdef BSD
if (!params.port)
{

2
nfq/params.h
View File

@@ -34,7 +34,7 @@ struct params_s
bool desync_retrans,desync_skip_nosni,desync_any_proto;
int desync_repeats,desync_split_pos;
unsigned int desync_cutoff;
uint8_t desync_ttl;
uint8_t desync_ttl, desync_ttl6;
uint8_t desync_tcp_fooling_mode;
uint32_t desync_fwmark; // unused in BSD
char hostfile[256];