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nfqws: synack desync mode

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bol-van
2021-04-07 12:13:46 +03:00
parent 8229bcc98b
commit fe8cada8ae
14 changed files with 99 additions and 23 deletions
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22
nfq/nfqws.c
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@@ -479,7 +479,7 @@ static void exithelp()
" --hostspell\t\t\t\t; exact spelling of \"Host\" header. must be 4 chars. default is \"host\"\n"
" --hostnospace\t\t\t\t; remove space after Host: and add it to User-Agent: to preserve packet size\n"
" --domcase\t\t\t\t; mix domain case : Host: TeSt.cOm\n"
" --dpi-desync=<mode>[,<mode2>]\t\t; try to desync dpi state. modes : fake rst rstack disorder disorder2 split split2\n"
" --dpi-desync=[<mode0>,]<mode>[,<mode2>] ; try to desync dpi state. modes : synack fake rst rstack disorder disorder2 split split2\n"
#ifdef __linux__
" --dpi-desync-fwmark=<int|0xHEX>\t; override fwmark for desync packet. default = 0x%08X (%u)\n"
#elif defined(SO_USER_COOKIE)
@@ -701,20 +701,30 @@ int main(int argc, char **argv)
break;
case 14: /* dpi-desync */
{
char *mode2;
mode2 = optarg ? strchr(optarg,',') : NULL;
char *mode=optarg,*mode2,*mode3;
mode2 = mode ? strchr(mode,',') : NULL;
if (mode2) *mode2++=0;
mode3 = mode2 ? strchr(mode2,',') : NULL;
if (mode3) *mode3++=0;
params.desync_mode = desync_mode_from_string(optarg);
params.desync_mode0 = desync_mode_from_string(mode);
if (desync_valid_zero_stage(params.desync_mode0))
{
mode = mode2;
mode2 = mode3;
}
else
params.desync_mode0 = DESYNC_NONE;
params.desync_mode = desync_mode_from_string(mode);
params.desync_mode2 = desync_mode_from_string(mode2);
if (params.desync_mode==DESYNC_NONE || params.desync_mode==DESYNC_INVALID || params.desync_mode2==DESYNC_INVALID)
if (params.desync_mode0==DESYNC_INVALID || params.desync_mode==DESYNC_INVALID || params.desync_mode2==DESYNC_INVALID)
{
fprintf(stderr, "invalid dpi-desync mode\n");
exit_clean(1);
}
if (params.desync_mode2 && !(desync_valid_first_stage(params.desync_mode) && desync_valid_second_stage(params.desync_mode2)))
{
fprintf(stderr, "invalid desync combo : %s+%s\n", optarg,mode2);
fprintf(stderr, "invalid desync combo : %s+%s\n", mode,mode2);
exit_clean(1);
}
}