tpws: multi-strategy

tpws/helpers.c

@@ -164,6 +164,21 @@ bool saconvmapped(struct sockaddr_storage *a)
 	return false;
 }
 
+void sacopy(struct sockaddr_storage *sa_dest, const struct sockaddr *sa)
+{
+	switch(sa->sa_family)
+	{
+		case AF_INET:
+			memcpy(sa_dest,sa,sizeof(struct sockaddr_in));
+			break;
+		case AF_INET6:
+			memcpy(sa_dest,sa,sizeof(struct sockaddr_in6));
+			break;
+		default:
+			sa_dest->ss_family = 0;
+	}
+}
+
 bool is_localnet(const struct sockaddr *a)
 {
 	// match 127.0.0.0/8, 0.0.0.0, ::1, ::0, :ffff:127.0.0.0/104, :ffff:0.0.0.0
@@ -243,7 +258,7 @@ bool pf_parse(const char *s, port_filter *pf)
 	unsigned int v1,v2;
 
 	if (!s) return false;
-	if (*s=='~') 
+	if (*s=='~')
 	{
 		pf->neg=true;
 		s++;
@@ -252,16 +267,22 @@ bool pf_parse(const char *s, port_filter *pf)
 		pf->neg=false;
 	if (sscanf(s,"%u-%u",&v1,&v2)==2)
 	{
-		if (!v1 || v1>65535 || v2>65535 || v1>v2) return false;
+		if (v1>65535 || v2>65535 || v1>v2) return false;
 		pf->from=(uint16_t)v1;
 		pf->to=(uint16_t)v2;
 	}
 	else if (sscanf(s,"%u",&v1)==1)
 	{
-		if (!v1 || v1>65535) return false;
+		if (v1>65535) return false;
 		pf->to=pf->from=(uint16_t)v1;
 	}
 	else
 		return false;
+	// deny all case
+	if (!pf->from && !pf->to) pf->neg=true;
 	return true;
 }
+bool pf_is_empty(const port_filter *pf)
+{
+	return !pf->neg && !pf->from && !pf->to;
+}

tpws/helpers.h

@@ -25,6 +25,8 @@ uint16_t saport(const struct sockaddr *sa);
 // true = was converted
 bool saconvmapped(struct sockaddr_storage *a);
 
+void sacopy(struct sockaddr_storage *sa_dest, const struct sockaddr *sa);
+
 bool is_localnet(const struct sockaddr *a);
 bool is_linklocal(const struct sockaddr_in6* a);
 bool is_private6(const struct sockaddr_in6* a);
@@ -55,6 +57,7 @@ typedef struct
 } port_filter;
 bool pf_in_range(uint16_t port, const port_filter *pf);
 bool pf_parse(const char *s, port_filter *pf);
+bool pf_is_empty(const port_filter *pf);
 
 #ifndef IN_LOOPBACK
 #define IN_LOOPBACK(a)          ((((uint32_t) (a)) & 0xff000000) == 0x7f000000)

tpws/hostlist.c

@@ -154,35 +154,53 @@ static bool HostlistCheck_(strpool *hostlist, strpool *hostlist_exclude, const c
 	return true;
 }
 
-// return : true = apply fooling, false = do not apply
+static bool LoadIncludeHostListsForProfile(struct desync_profile *dp)
-bool HostlistCheck(const char *host, bool *excluded)
 {
-	if (*params.hostlist_auto_filename)
+	if (!LoadHostLists(&dp->hostlist, &dp->hostlist_files))
+		return false;
+	if (*dp->hostlist_auto_filename)
 	{
-		time_t t = file_mod_time(params.hostlist_auto_filename);
+		dp->hostlist_auto_mod_time = file_mod_time(dp->hostlist_auto_filename);
-		if (t!=params.hostlist_auto_mod_time)
+		NonEmptyHostlist(&dp->hostlist);
+	}
+	return true;
+}
+
+// return : true = apply fooling, false = do not apply
+bool HostlistCheck(struct desync_profile *dp, const char *host, bool *excluded)
+{
+	VPRINT("* Hostlist check for profile %d\n",dp->n);
+	if (*dp->hostlist_auto_filename)
+	{
+		time_t t = file_mod_time(dp->hostlist_auto_filename);
+		if (t!=dp->hostlist_auto_mod_time)
 		{
-			DLOG_CONDUP("Autohostlist was modified by another process. Reloading include hostslist.\n");
+			DLOG_CONDUP("Autohostlist '%s' from profile %d was modified. Reloading include hostlists for this profile.\n",dp->hostlist_auto_filename, dp->n);
-			if (!LoadIncludeHostLists())
+			if (!LoadIncludeHostListsForProfile(dp))
 			{
 				// what will we do without hostlist ?? sure, gonna die
 				exit(1);
 			}
-			params.hostlist_auto_mod_time = t;
+			dp->hostlist_auto_mod_time = t;
+			NonEmptyHostlist(&dp->hostlist);
 		}
 	}
-	return HostlistCheck_(params.hostlist, params.hostlist_exclude, host, excluded);
+	return HostlistCheck_(dp->hostlist, dp->hostlist_exclude, host, excluded);
 }
 
 bool LoadIncludeHostLists()
 {
-	if (!LoadHostLists(&params.hostlist, &params.hostlist_files))
+	struct desync_profile_list *dpl;
-		return false;
+	LIST_FOREACH(dpl, &params.desync_profiles, next)
-	if (*params.hostlist_auto_filename)
+		if (!LoadIncludeHostListsForProfile(&dpl->dp))
-		params.hostlist_auto_mod_time = file_mod_time(params.hostlist_auto_filename);
+			return false;
 	return true;
 }
 bool LoadExcludeHostLists()
 {
-	return LoadHostLists(&params.hostlist_exclude, &params.hostlist_exclude_files);
+	struct desync_profile_list *dpl;
+	LIST_FOREACH(dpl, &params.desync_profiles, next)
+		if (!LoadHostLists(&dpl->dp.hostlist_exclude, &dpl->dp.hostlist_exclude_files))
+			return false;
+	return true;
 }

tpws/hostlist.h

@@ -2,6 +2,7 @@
 
 #include <stdbool.h>
 #include "pools.h"
+#include "params.h"
 
 bool AppendHostList(strpool **hostlist, char *filename);
 bool LoadHostLists(strpool **hostlist, struct str_list_head *file_list);
@@ -10,4 +11,4 @@ bool LoadExcludeHostLists();
 bool NonEmptyHostlist(strpool **hostlist);
 bool SearchHostList(strpool *hostlist, const char *host);
 // return : true = apply fooling, false = do not apply
-bool HostlistCheck(const char *host, bool *excluded);
+bool HostlistCheck(struct desync_profile *dp,const char *host, bool *excluded);

tpws/params.c

@@ -138,3 +138,56 @@ int HOSTLIST_DEBUGLOG_APPEND(const char *format, ...)
 	else
 		return 0;
 }
+
+
+struct desync_profile_list *dp_list_add(struct desync_profile_list_head *head)
+{
+	struct desync_profile_list *entry = calloc(1,sizeof(struct desync_profile_list));
+	if (!entry) return NULL;
+
+	LIST_INIT(&entry->dp.hostlist_files);
+	LIST_INIT(&entry->dp.hostlist_exclude_files);
+	entry->dp.filter_ipv4 = entry->dp.filter_ipv6 = true;
+
+	memcpy(entry->dp.hostspell, "host", 4); // default hostspell
+	entry->dp.hostlist_auto_fail_threshold = HOSTLIST_AUTO_FAIL_THRESHOLD_DEFAULT;
+	entry->dp.hostlist_auto_fail_time = HOSTLIST_AUTO_FAIL_TIME_DEFAULT;
+
+	// add to the tail
+	struct desync_profile_list *dpn,*dpl=LIST_FIRST(&params.desync_profiles);
+	if (dpl)
+	{
+		while ((dpn=LIST_NEXT(dpl,next))) dpl = dpn;
+		LIST_INSERT_AFTER(dpl, entry, next);
+	}
+	else
+		LIST_INSERT_HEAD(&params.desync_profiles, entry, next);
+
+	return entry;
+}
+static void dp_entry_destroy(struct desync_profile_list *entry)
+{
+	strlist_destroy(&entry->dp.hostlist_files);
+	strlist_destroy(&entry->dp.hostlist_exclude_files);
+	StrPoolDestroy(&entry->dp.hostlist_exclude);
+	StrPoolDestroy(&entry->dp.hostlist);
+	HostFailPoolDestroy(&entry->dp.hostlist_auto_fail_counters);
+	free(entry);
+}
+void dp_list_destroy(struct desync_profile_list_head *head)
+{
+	struct desync_profile_list *entry;
+	while ((entry = LIST_FIRST(head)))
+	{
+		LIST_REMOVE(entry, next);
+		dp_entry_destroy(entry);
+	}
+}
+bool dp_list_have_autohostlist(struct desync_profile_list_head *head)
+{
+	struct desync_profile_list *dpl;
+	LIST_FOREACH(dpl, head, next)
+		if (*dpl->dp.hostlist_auto_filename)
+			return true;
+	return false;
+}

tpws/params.h

@@ -27,27 +27,10 @@ struct bind_s
 
 enum log_target { LOG_TARGET_CONSOLE=0, LOG_TARGET_FILE, LOG_TARGET_SYSLOG };
 
-struct params_s
+struct desync_profile
 {
-	struct bind_s binds[MAX_BINDS];
+	int n;	// number of the profile
-	int binds_last;
-	bool bind_wait_only;
-	uint16_t port;
 
-	uint8_t proxy_type;
-	bool no_resolve;
-	bool skip_nodelay;
-	bool droproot;
-	uid_t uid;
-	gid_t gid;
-	bool daemon;
-	int maxconn,resolver_threads,maxfiles,max_orphan_time;
-	int local_rcvbuf,local_sndbuf,remote_rcvbuf,remote_sndbuf;
-#if defined(__linux__) || defined(__APPLE__)
-	int tcp_user_timeout_local,tcp_user_timeout_remote;
-#endif
-
-	bool tamper; // any tamper option is set
 	bool hostcase, hostdot, hosttab, hostnospace, methodspace, methodeol, unixeol, domcase;
 	int hostpad;
 	char hostspell[4];
@@ -60,30 +43,59 @@ struct params_s
 	bool disorder, disorder_http, disorder_tls;
 	bool oob, oob_http, oob_tls;
 	uint8_t oob_byte;
-	int ttl_default;
 
 	int mss;
-	port_filter mss_pf;
-
-	char pidfile[256];
-
-	strpool *hostlist, *hostlist_exclude;
-	struct str_list_head hostlist_files, hostlist_exclude_files;
-	char hostlist_auto_filename[PATH_MAX], hostlist_auto_debuglog[PATH_MAX];
-	int hostlist_auto_fail_threshold, hostlist_auto_fail_time;
-	time_t hostlist_auto_mod_time;
-	hostfail_pool *hostlist_auto_fail_counters;
 
 	bool tamper_start_n,tamper_cutoff_n;
 	unsigned int tamper_start,tamper_cutoff;
+	
+	bool filter_ipv4,filter_ipv6;
+	port_filter pf_tcp;
 
+	strpool *hostlist, *hostlist_exclude;
+	struct str_list_head hostlist_files, hostlist_exclude_files;
+	char hostlist_auto_filename[PATH_MAX];
+	int hostlist_auto_fail_threshold, hostlist_auto_fail_time;
+	time_t hostlist_auto_mod_time;
+	hostfail_pool *hostlist_auto_fail_counters;
+};
+
+struct desync_profile_list {
+	struct desync_profile dp;
+	LIST_ENTRY(desync_profile_list) next;
+};
+LIST_HEAD(desync_profile_list_head, desync_profile_list);
+struct desync_profile_list *dp_list_add(struct desync_profile_list_head *head);
+void dp_list_destroy(struct desync_profile_list_head *head);
+bool dp_list_have_autohostlist(struct desync_profile_list_head *head);
+
+struct params_s
+{
+	int debug;
+	enum log_target debug_target;
+	char debug_logfile[PATH_MAX];
+
+	struct bind_s binds[MAX_BINDS];
+	int binds_last;
+	bool bind_wait_only;
+	uint16_t port;
 	struct sockaddr_in connect_bind4;
 	struct sockaddr_in6 connect_bind6;
 	char connect_bind6_ifname[IF_NAMESIZE];
 
-	int debug;
+	uint8_t proxy_type;
-	enum log_target debug_target;
+	bool no_resolve;
-	char debug_logfile[PATH_MAX];
+	bool skip_nodelay;
+	bool droproot;
+	uid_t uid;
+	gid_t gid;
+	bool daemon;
+	char pidfile[256];
+	int maxconn,resolver_threads,maxfiles,max_orphan_time;
+	int local_rcvbuf,local_sndbuf,remote_rcvbuf,remote_sndbuf;
+#if defined(__linux__) || defined(__APPLE__)
+	int tcp_user_timeout_local,tcp_user_timeout_remote;
+#endif
 
 #if defined(BSD)
 	bool pf_enable;
@@ -91,6 +103,13 @@ struct params_s
 #ifdef SPLICE_PRESENT
 	bool nosplice;
 #endif
+
+	int ttl_default;
+	char hostlist_auto_debuglog[PATH_MAX];
+
+	bool tamper; // any tamper option is set
+	bool tamper_lim; // tamper-start or tamper-cutoff set in any profile
+	struct desync_profile_list_head desync_profiles;
 };
 
 extern struct params_s params;

tpws/protocol.c

@@ -25,12 +25,45 @@ bool IsHttp(const uint8_t *data, size_t len)
 {
 	return !!HttpMethod(data,len);
 }
+
+static bool IsHostAt(const uint8_t *p)
+{
+	return \
+		p[0]=='\n' &&
+		(p[1]=='H' || p[1]=='h') &&
+		(p[2]=='o' || p[2]=='O') &&
+		(p[3]=='s' || p[3]=='S') &&
+		(p[4]=='t' || p[4]=='T') &&
+		p[5]==':';
+}
+static uint8_t *FindHostIn(uint8_t *buf, size_t bs)
+{
+	size_t pos;
+	if (bs<6) return NULL;
+	bs-=6;
+	for(pos=0;pos<=bs;pos++)
+		if (IsHostAt(buf+pos))
+			return buf+pos;
+
+	return NULL;
+}
+static const uint8_t *FindHostInConst(const uint8_t *buf, size_t bs)
+{
+	size_t pos;
+	if (bs<6) return NULL;
+	bs-=6;
+	for(pos=0;pos<=bs;pos++)
+		if (IsHostAt(buf+pos))
+			return buf+pos;
+
+	return NULL;
+}
 // pHost points to "Host: ..."
 bool HttpFindHost(uint8_t **pHost,uint8_t *buf,size_t bs)
 {
 	if (!*pHost)
 	{
-		*pHost = memmem(buf, bs, "\nHost:", 6);
+		*pHost = FindHostIn(buf, bs);
 		if (*pHost) (*pHost)++;
 	}
 	return !!*pHost;
@@ -39,7 +72,7 @@ bool HttpFindHostConst(const uint8_t **pHost,const uint8_t *buf,size_t bs)
 {
 	if (!*pHost)
 	{
-		*pHost = memmem(buf, bs, "\nHost:", 6);
+		*pHost = FindHostInConst(buf, bs);
 		if (*pHost) (*pHost)++;
 	}
 	return !!*pHost;
@@ -132,7 +165,7 @@ bool HttpReplyLooksLikeDPIRedirect(const uint8_t *data, size_t len, const char *
 }
 size_t HttpPos(enum httpreqpos tpos_type, size_t hpos_pos, const uint8_t *http, size_t sz)
 {
-	const uint8_t *method, *host;
+	const uint8_t *method, *host=NULL;
 	int i;
 	
 	switch(tpos_type)

tpws/tamper.c

@@ -1,24 +1,87 @@
 #define _GNU_SOURCE
 
 #include "tamper.h"
-#include "params.h"
 #include "hostlist.h"
 #include "protocol.h"
 #include "helpers.h"
 #include <string.h>
 #include <stdio.h>
 
+static bool dp_match_l3l4(struct desync_profile *dp, bool ipv6, uint16_t tcp_port)
+{
+	return \
+		((!ipv6 && dp->filter_ipv4) || (ipv6 && dp->filter_ipv6)) &&
+		(!tcp_port || pf_in_range(tcp_port,&dp->pf_tcp));
+}
+static bool dp_match(struct desync_profile *dp, bool ipv6, uint16_t tcp_port, const char *hostname)
+{
+	if (dp_match_l3l4(dp,ipv6,tcp_port))
+	{
+		// autohostlist profile matching l3/l4 filter always win
+		if (*dp->hostlist_auto_filename) return true;
+
+		if (dp->hostlist || dp->hostlist_exclude)
+		{
+			// without known hostname first profile matching l3/l4 filter and without hostlist filter wins
+			if (hostname)
+				return HostlistCheck(dp, hostname, NULL);
+		}
+		else
+			// profile without hostlist filter wins
+			return true;
+	}
+	return false;
+}
+static struct desync_profile *dp_find(struct desync_profile_list_head *head, bool ipv6, uint16_t tcp_port, const char *hostname)
+{
+	struct desync_profile_list *dpl;
+	VPRINT("desync profile search for hostname='%s' ipv6=%u tcp_port=%u\n", hostname ? hostname : "", ipv6, tcp_port);
+	LIST_FOREACH(dpl, head, next)
+	{
+		if (dp_match(&dpl->dp,ipv6,tcp_port,hostname))
+		{
+			VPRINT("desync profile %d matches\n",dpl->dp.n);
+			return &dpl->dp;
+		}
+	}
+	VPRINT("desync profile not found\n");
+	return NULL;
+}
+void apply_desync_profile(t_ctrack *ctrack, const struct sockaddr *dest)
+{
+	ctrack->dp = dp_find(&params.desync_profiles, dest->sa_family==AF_INET6, saport(dest), ctrack->hostname);
+}
+
+
+
 // segment buffer has at least 5 extra bytes to extend data block
-void tamper_out(t_ctrack *ctrack, uint8_t *segment,size_t segment_buffer_size,size_t *size, size_t *split_pos, uint8_t *split_flags)
+void tamper_out(t_ctrack *ctrack, const struct sockaddr *dest, uint8_t *segment,size_t segment_buffer_size,size_t *size, size_t *split_pos, uint8_t *split_flags)
 {
 	uint8_t *p, *pp, *pHost = NULL;
 	size_t method_len = 0, pos;
+	size_t tpos, spos;
 	const char *method;
-	bool bBypass = false, bHaveHost = false, bHostExcluded = false;
+	bool bHaveHost = false;
 	char *pc, Host[256];
-	
+	t_l7proto l7proto;
+
 	DBGPRINT("tamper_out\n");
 
+	if (params.debug)
+	{
+		char ip_port[48];
+		ntop46_port(dest,ip_port,sizeof(ip_port));
+		VPRINT("tampering tcp segment with size %zu to %s\n", *size, ip_port);
+		if (ctrack->dp) VPRINT("using cached desync profile %d\n",ctrack->dp->n);
+		if (ctrack->hostname) VPRINT("connection hostname: %s\n", ctrack->hostname);
+	}
+		
+	if (dest->sa_family!=AF_INET && dest->sa_family!=AF_INET6)
+	{
+		DLOG_ERR("tamper_out dest family unknown\n");
+		return;
+	}
+
 	*split_pos=0;
 	*split_flags=0;
 
@@ -26,9 +89,8 @@ void tamper_out(t_ctrack *ctrack, uint8_t *segment,size_t segment_buffer_size,si
 	{
 		method_len = strlen(method)-2;
 		VPRINT("Data block looks like http request start : %s\n", method);
-		if (!ctrack->l7proto) ctrack->l7proto=HTTP;
+		l7proto=HTTP;
-		// cpu saving : we search host only if and when required. we do not research host every time we need its position
+		if (HttpFindHost(&pHost,segment,*size))
-		if ((params.hostlist || params.hostlist_exclude) && HttpFindHost(&pHost,segment,*size))
 		{
 			p = pHost + 5;
 			while (p < (segment + *size) && (*p == ' ' || *p == '\t')) p++;
@@ -37,13 +99,57 @@ void tamper_out(t_ctrack *ctrack, uint8_t *segment,size_t segment_buffer_size,si
 			memcpy(Host, p, pp - p);
 			Host[pp - p] = '\0';
 			bHaveHost = true;
-			VPRINT("Requested Host is : %s\n", Host);
 			for(pc = Host; *pc; pc++) *pc=tolower(*pc);
-			bBypass = !HostlistCheck(Host, &bHostExcluded);
 		}
-		if (!bBypass)
+	}
+	else if (IsTLSClientHello(segment,*size,false))
+	{
+		VPRINT("Data block contains TLS ClientHello\n");
+		l7proto=TLS;
+		bHaveHost=TLSHelloExtractHost((uint8_t*)segment,*size,Host,sizeof(Host),false);
+	}
+	else
+	{
+		VPRINT("Data block contains unknown payload\n");
+		l7proto = UNKNOWN;
+	}
+
+	if (ctrack->l7proto==UNKNOWN) ctrack->l7proto=l7proto;
+
+	if (bHaveHost)
+	{
+		VPRINT("request hostname: %s\n", Host);
+		if (!ctrack->hostname)
 		{
-			if (params.unixeol)
+			if (!(ctrack->hostname=strdup(Host)))
+			{
+				DLOG_ERR("strdup hostname : out of memory\n");
+				return;
+			}
+
+			struct desync_profile *dp_prev = ctrack->dp;
+			apply_desync_profile(ctrack, dest);
+			if (ctrack->dp!=dp_prev)
+				VPRINT("desync profile changed by revealed hostname !\n");
+			else if (*ctrack->dp->hostlist_auto_filename)
+			{
+				bool bHostExcluded;
+				if (!HostlistCheck(ctrack->dp, Host, &bHostExcluded))
+				{
+					ctrack->b_ah_check = !bHostExcluded;
+					VPRINT("Not acting on this request\n");
+					return;
+				}
+			}
+		}
+	}
+	
+	if (!ctrack->dp) return;
+
+	switch(l7proto)
+	{
+		case HTTP:
+			if (ctrack->dp->unixeol)
 			{
 				p = pp = segment;
 				while ((p = memmem(p, segment + *size - p, "\r\n", 2)))
@@ -61,10 +167,10 @@ void tamper_out(t_ctrack *ctrack, uint8_t *segment,size_t segment_buffer_size,si
 				}
 				pHost = NULL; // invalidate
 			}
-			if (params.methodeol && (*size+1+!params.unixeol)<=segment_buffer_size)
+			if (ctrack->dp->methodeol && (*size+1+!ctrack->dp->unixeol)<=segment_buffer_size)
 			{
 				VPRINT("Adding EOL before method\n");
-				if (params.unixeol)
+				if (ctrack->dp->unixeol)
 				{
 					memmove(segment + 1, segment, *size);
 					(*size)++;;
@@ -79,7 +185,7 @@ void tamper_out(t_ctrack *ctrack, uint8_t *segment,size_t segment_buffer_size,si
 				}
 				pHost = NULL; // invalidate
 			}
-			if (params.methodspace && *size<segment_buffer_size)
+			if (ctrack->dp->methodspace && *size<segment_buffer_size)
 			{
 				// we only work with data blocks looking as HTTP query, so method is at the beginning
 				VPRINT("Adding extra space after method\n");
@@ -90,20 +196,20 @@ void tamper_out(t_ctrack *ctrack, uint8_t *segment,size_t segment_buffer_size,si
 				(*size)++; // block will grow by 1 byte
 				if (pHost) pHost++; // Host: position will move by 1 byte
 			}
-			if ((params.hostdot || params.hosttab) && *size<segment_buffer_size && HttpFindHost(&pHost,segment,*size))
+			if ((ctrack->dp->hostdot || ctrack->dp->hosttab) && *size<segment_buffer_size && HttpFindHost(&pHost,segment,*size))
 			{
 				p = pHost + 5;
 				while (p < (segment + *size) && *p != '\r' && *p != '\n') p++;
 				if (p < (segment + *size))
 				{
 					pos = p - segment;
-					VPRINT("Adding %s to host name at pos %zu\n", params.hostdot ? "dot" : "tab", pos);
+					VPRINT("Adding %s to host name at pos %zu\n", ctrack->dp->hostdot ? "dot" : "tab", pos);
 					memmove(p + 1, p, *size - pos);
-					*p = params.hostdot ? '.' : '\t'; // insert dot or tab
+					*p = ctrack->dp->hostdot ? '.' : '\t'; // insert dot or tab
 					(*size)++; // block will grow by 1 byte
 				}
 			}
-			if (params.domcase && HttpFindHost(&pHost,segment,*size))
+			if (ctrack->dp->domcase && HttpFindHost(&pHost,segment,*size))
 			{
 				p = pHost + 5;
 				pos = p - segment;
@@ -111,7 +217,7 @@ void tamper_out(t_ctrack *ctrack, uint8_t *segment,size_t segment_buffer_size,si
 				for (; p < (segment + *size) && *p != '\r' && *p != '\n'; p++)
 					*p = (((size_t)p) & 1) ? tolower(*p) : toupper(*p);
 			}
-			if (params.hostnospace && HttpFindHost(&pHost,segment,*size) && (pHost+5)<(segment+*size) && pHost[5] == ' ')
+			if (ctrack->dp->hostnospace && HttpFindHost(&pHost,segment,*size) && (pHost+5)<(segment+*size) && pHost[5] == ' ')
 			{
 				p = pHost + 6;
 				pos = p - segment;
@@ -119,17 +225,17 @@ void tamper_out(t_ctrack *ctrack, uint8_t *segment,size_t segment_buffer_size,si
 				memmove(p - 1, p, *size - pos);
 				(*size)--; // block will shrink by 1 byte
 			}
-			if (params.hostcase && HttpFindHost(&pHost,segment,*size))
+			if (ctrack->dp->hostcase && HttpFindHost(&pHost,segment,*size))
 			{
-				VPRINT("Changing 'Host:' => '%c%c%c%c:' at pos %td\n", params.hostspell[0], params.hostspell[1], params.hostspell[2], params.hostspell[3], pHost - segment);
+				VPRINT("Changing 'Host:' => '%c%c%c%c:' at pos %td\n", ctrack->dp->hostspell[0], ctrack->dp->hostspell[1], ctrack->dp->hostspell[2], ctrack->dp->hostspell[3], pHost - segment);
-				memcpy(pHost, params.hostspell, 4);
+				memcpy(pHost, ctrack->dp->hostspell, 4);
 			}
-			if (params.hostpad && HttpFindHost(&pHost,segment,*size))
+			if (ctrack->dp->hostpad && HttpFindHost(&pHost,segment,*size))
 			{
 				//  add :  XXXXX: <padding?[\r\n|\n]
 				char s[8];
-				size_t hsize = params.unixeol ? 8 : 9;
+				size_t hsize = ctrack->dp->unixeol ? 8 : 9;
-				size_t hostpad = params.hostpad<hsize ? hsize : params.hostpad;
+				size_t hostpad = ctrack->dp->hostpad<hsize ? hsize : ctrack->dp->hostpad;
 
 				if ((hsize+*size)>segment_buffer_size)
 					VPRINT("could not add host padding : buffer too small\n");
@@ -159,7 +265,7 @@ void tamper_out(t_ctrack *ctrack, uint8_t *segment,size_t segment_buffer_size,si
 						p+=7;
 						memset(p,'a'+rand()%('z'-'a'+1),padsize);
 						p+=padsize;
-						if (params.unixeol)
+						if (ctrack->dp->unixeol)
 							*p++='\n';
 						else
 						{
@@ -171,40 +277,16 @@ void tamper_out(t_ctrack *ctrack, uint8_t *segment,size_t segment_buffer_size,si
 					pHost = NULL; // invalidate
 				}
 			}
-			*split_pos = HttpPos(params.split_http_req, params.split_pos, segment, *size);
+			*split_pos = HttpPos(ctrack->dp->split_http_req, ctrack->dp->split_pos, segment, *size);
-			if (params.disorder_http) *split_flags |= SPLIT_FLAG_DISORDER;
+			if (ctrack->dp->disorder_http) *split_flags |= SPLIT_FLAG_DISORDER;
-			if (params.oob_http) *split_flags |= SPLIT_FLAG_OOB;
+			if (ctrack->dp->oob_http) *split_flags |= SPLIT_FLAG_OOB;
-		}
+			break;
-		else
-		{
-			VPRINT("Not acting on this request\n");
-		}
-	}
-	else if (IsTLSClientHello(segment,*size,false))
-	{
-		size_t tpos=0,spos=0;
-		
-		if (!ctrack->l7proto) ctrack->l7proto=TLS;
-
-		VPRINT("packet contains TLS ClientHello\n");
-		// we need host only if hostlist is present
-		if ((params.hostlist || params.hostlist_exclude) && TLSHelloExtractHost((uint8_t*)segment,*size,Host,sizeof(Host),false))
-		{
-			VPRINT("hostname: %s\n",Host);
-			bHaveHost = true;
-			bBypass = !HostlistCheck(Host, &bHostExcluded);
-		}
-		if (bBypass)
-		{
-			VPRINT("Not acting on this request\n");
-		}
-		else
-		{
-			spos = TLSPos(params.split_tls, params.split_pos, segment, *size, 0);
 
+		case TLS:
+			spos = TLSPos(ctrack->dp->split_tls, ctrack->dp->split_pos, segment, *size, 0);
 			if ((5+*size)<=segment_buffer_size)
 			{
-				tpos = TLSPos(params.tlsrec, params.tlsrec_pos+5, segment, *size, 0);
+				tpos = TLSPos(ctrack->dp->tlsrec, ctrack->dp->tlsrec_pos+5, segment, *size, 0);
 				if (tpos>5)
 				{
 					// construct 2 TLS records from one
@@ -228,52 +310,46 @@ void tamper_out(t_ctrack *ctrack, uint8_t *segment,size_t segment_buffer_size,si
 			}
 
 			if (spos && spos < *size)
-			{
-				VPRINT("split pos %zu\n",spos);
 				*split_pos = spos;
-			}
 
-			if (params.disorder_tls) *split_flags |= SPLIT_FLAG_DISORDER;
+			if (ctrack->dp->disorder_tls) *split_flags |= SPLIT_FLAG_DISORDER;
-			if (params.oob_tls) *split_flags |= SPLIT_FLAG_OOB;
+			if (ctrack->dp->oob_tls) *split_flags |= SPLIT_FLAG_OOB;
-		}
+			
+			break;
+
+		default:
+			if (ctrack->dp->split_any_protocol && ctrack->dp->split_pos < *size)
+				*split_pos = ctrack->dp->split_pos;
 	}
-	else if (params.split_any_protocol && params.split_pos < *size)
-		*split_pos = params.split_pos;
 		
-	if (bHaveHost && bBypass && !bHostExcluded && *params.hostlist_auto_filename)
+	if (ctrack->dp->disorder) *split_flags |= SPLIT_FLAG_DISORDER;
-	{
+	if (ctrack->dp->oob) *split_flags |= SPLIT_FLAG_OOB;
-		DBGPRINT("tamper_out put hostname : %s\n", Host);
-		if (ctrack->hostname) free(ctrack->hostname);
-		ctrack->hostname=strdup(Host);
-	}
-	if (params.disorder) *split_flags |= SPLIT_FLAG_DISORDER;
-	if (params.oob) *split_flags |= SPLIT_FLAG_OOB;
 }
 
-static void auto_hostlist_reset_fail_counter(const char *hostname)
+static void auto_hostlist_reset_fail_counter(struct desync_profile *dp, const char *hostname)
 {
 	if (hostname)
 	{
 		hostfail_pool *fail_counter;
 	
-		fail_counter = HostFailPoolFind(params.hostlist_auto_fail_counters, hostname);
+		fail_counter = HostFailPoolFind(dp->hostlist_auto_fail_counters, hostname);
 		if (fail_counter)
 		{
-			HostFailPoolDel(&params.hostlist_auto_fail_counters, fail_counter);
+			HostFailPoolDel(&dp->hostlist_auto_fail_counters, fail_counter);
-			VPRINT("auto hostlist : %s : fail counter reset. website is working.\n", hostname);
+			VPRINT("auto hostlist (profile %d) : %s : fail counter reset. website is working.\n", dp->n, hostname);
-			HOSTLIST_DEBUGLOG_APPEND("%s : fail counter reset. website is working.", hostname);
+			HOSTLIST_DEBUGLOG_APPEND("%s : profile %d : fail counter reset. website is working.", hostname, dp->n);
 		}
 	}
 }
 
-static void auto_hostlist_failed(const char *hostname)
+static void auto_hostlist_failed(struct desync_profile *dp, const char *hostname)
 {
 	hostfail_pool *fail_counter;
 
-	fail_counter = HostFailPoolFind(params.hostlist_auto_fail_counters, hostname);
+	fail_counter = HostFailPoolFind(dp->hostlist_auto_fail_counters, hostname);
 	if (!fail_counter)
 	{
-		fail_counter = HostFailPoolAdd(&params.hostlist_auto_fail_counters, hostname, params.hostlist_auto_fail_time);
+		fail_counter = HostFailPoolAdd(&dp->hostlist_auto_fail_counters, hostname, dp->hostlist_auto_fail_time);
 		if (!fail_counter)
 		{
 			DLOG_ERR("HostFailPoolAdd: out of memory\n");
@@ -281,35 +357,35 @@ static void auto_hostlist_failed(const char *hostname)
 		}
 	}
 	fail_counter->counter++;
-	VPRINT("auto hostlist : %s : fail counter %d/%d\n", hostname, fail_counter->counter, params.hostlist_auto_fail_threshold);
+	VPRINT("auto hostlist (profile %d) : %s : fail counter %d/%d\n", dp->n , hostname, fail_counter->counter, dp->hostlist_auto_fail_threshold);
-	HOSTLIST_DEBUGLOG_APPEND("%s : fail counter %d/%d", hostname, fail_counter->counter, params.hostlist_auto_fail_threshold);
+	HOSTLIST_DEBUGLOG_APPEND("%s : profile %d : fail counter %d/%d", hostname, dp->n, fail_counter->counter, dp->hostlist_auto_fail_threshold);
-	if (fail_counter->counter >= params.hostlist_auto_fail_threshold)
+	if (fail_counter->counter >= dp->hostlist_auto_fail_threshold)
 	{
-		VPRINT("auto hostlist : fail threshold reached. adding %s to auto hostlist\n", hostname);
+		VPRINT("auto hostlist (profile %d) : fail threshold reached. adding %s to auto hostlist\n", dp->n , hostname);
-		HostFailPoolDel(&params.hostlist_auto_fail_counters, fail_counter);
+		HostFailPoolDel(&dp->hostlist_auto_fail_counters, fail_counter);
 		
-		VPRINT("auto hostlist : rechecking %s to avoid duplicates\n", hostname);
+		VPRINT("auto hostlist (profile %d) : rechecking %s to avoid duplicates\n", dp->n, hostname);
 		bool bExcluded=false;
-		if (!HostlistCheck(hostname, &bExcluded) && !bExcluded)
+		if (!HostlistCheck(dp, hostname, &bExcluded) && !bExcluded)
 		{
-			VPRINT("auto hostlist : adding %s\n", hostname);
+			VPRINT("auto hostlist (profile %d) : adding %s to %s\n", dp->n, hostname, dp->hostlist_auto_filename);
-			HOSTLIST_DEBUGLOG_APPEND("%s : adding", hostname);
+			HOSTLIST_DEBUGLOG_APPEND("%s : profile %d : adding to %s", hostname, dp->n, dp->hostlist_auto_filename);
-			if (!StrPoolAddStr(&params.hostlist, hostname))
+			if (!StrPoolAddStr(&dp->hostlist, hostname))
 			{
 				DLOG_ERR("StrPoolAddStr out of memory\n");
 				return;
 			}
-			if (!append_to_list_file(params.hostlist_auto_filename, hostname))
+			if (!append_to_list_file(dp->hostlist_auto_filename, hostname))
 			{
 				DLOG_PERROR("write to auto hostlist:");
 				return;
 			}
-			params.hostlist_auto_mod_time = file_mod_time(params.hostlist_auto_filename);
+			dp->hostlist_auto_mod_time = file_mod_time(dp->hostlist_auto_filename);
 		}
 		else
 		{
-			VPRINT("auto hostlist : NOT adding %s\n", hostname);
+			VPRINT("auto hostlist (profile %d) : NOT adding %s\n", dp->n, hostname);
-			HOSTLIST_DEBUGLOG_APPEND("%s : NOT adding, duplicate detected", hostname);
+			HOSTLIST_DEBUGLOG_APPEND("%s : profile %d : NOT adding, duplicate detected", hostname, dp->n);
 		}
 	}
 }
@@ -320,9 +396,9 @@ void tamper_in(t_ctrack *ctrack, uint8_t *segment,size_t segment_buffer_size,siz
 
 	DBGPRINT("tamper_in hostname=%s\n", ctrack->hostname);
 
-	if (*params.hostlist_auto_filename)
+	if (ctrack->dp && ctrack->b_ah_check)
 	{
-		HostFailPoolPurgeRateLimited(&params.hostlist_auto_fail_counters);
+		HostFailPoolPurgeRateLimited(&ctrack->dp->hostlist_auto_fail_counters);
 
 		if (ctrack->l7proto==HTTP && ctrack->hostname)
 		{
@@ -333,7 +409,7 @@ void tamper_in(t_ctrack *ctrack, uint8_t *segment,size_t segment_buffer_size,siz
 				if (bFail)
 				{
 					VPRINT("redirect to another domain detected. possibly DPI redirect.\n");
-					HOSTLIST_DEBUGLOG_APPEND("%s : redirect to another domain", ctrack->hostname);
+					HOSTLIST_DEBUGLOG_APPEND("%s : profile %d : redirect to another domain", ctrack->hostname, ctrack->dp->n);
 				}
 				else
 					VPRINT("local or in-domain redirect detected. it's not a DPI redirect.\n");
@@ -343,11 +419,9 @@ void tamper_in(t_ctrack *ctrack, uint8_t *segment,size_t segment_buffer_size,siz
 				// received not http reply. do not monitor this connection anymore
 				VPRINT("incoming unknown HTTP data detected for hostname %s\n", ctrack->hostname);
 			}
-			if (bFail) auto_hostlist_failed(ctrack->hostname);
+			if (bFail) auto_hostlist_failed(ctrack->dp, ctrack->hostname);
-
 		}
-		if (!bFail) auto_hostlist_reset_fail_counter(ctrack->hostname);
+		if (!bFail) auto_hostlist_reset_fail_counter(ctrack->dp, ctrack->hostname);
-
 	}
 	ctrack->bTamperInCutoff = true;
 }
@@ -356,30 +430,32 @@ void rst_in(t_ctrack *ctrack)
 {
 	DBGPRINT("rst_in hostname=%s\n", ctrack->hostname);
 
-	if (!*params.hostlist_auto_filename) return;
+	if (ctrack->dp && ctrack->b_ah_check)
-
-	HostFailPoolPurgeRateLimited(&params.hostlist_auto_fail_counters);
-
-	if (!ctrack->bTamperInCutoff && ctrack->hostname)
 	{
-		VPRINT("incoming RST detected for hostname %s\n", ctrack->hostname);
+		HostFailPoolPurgeRateLimited(&ctrack->dp->hostlist_auto_fail_counters);
-		HOSTLIST_DEBUGLOG_APPEND("%s : incoming RST", ctrack->hostname);
+
-		auto_hostlist_failed(ctrack->hostname);
+		if (!ctrack->bTamperInCutoff && ctrack->hostname)
+		{
+			VPRINT("incoming RST detected for hostname %s\n", ctrack->hostname);
+			HOSTLIST_DEBUGLOG_APPEND("%s : profile %d : incoming RST", ctrack->hostname, ctrack->dp->n);
+			auto_hostlist_failed(ctrack->dp, ctrack->hostname);
+		}
 	}
 }
 void hup_out(t_ctrack *ctrack)
 {
 	DBGPRINT("hup_out hostname=%s\n", ctrack->hostname);
-
+	
-	if (!*params.hostlist_auto_filename) return;
+	if (ctrack->dp && ctrack->b_ah_check)
-
-	HostFailPoolPurgeRateLimited(&params.hostlist_auto_fail_counters);
-
-	if (!ctrack->bTamperInCutoff && ctrack->hostname)
 	{
-		// local leg dropped connection after first request. probably due to timeout.
+		HostFailPoolPurgeRateLimited(&ctrack->dp->hostlist_auto_fail_counters);
-		VPRINT("local leg closed connection after first request (timeout ?). hostname: %s\n", ctrack->hostname);
+
-		HOSTLIST_DEBUGLOG_APPEND("%s : client closed connection without server reply", ctrack->hostname);
+		if (!ctrack->bTamperInCutoff && ctrack->hostname)
-		auto_hostlist_failed(ctrack->hostname);
+		{
+			// local leg dropped connection after first request. probably due to timeout.
+			VPRINT("local leg closed connection after first request (timeout ?). hostname: %s\n", ctrack->hostname);
+			HOSTLIST_DEBUGLOG_APPEND("%s : profile %d : client closed connection without server reply", ctrack->hostname, ctrack->dp->n);
+			auto_hostlist_failed(ctrack->dp, ctrack->hostname);
+		}
 	}
 }

tpws/tamper.h

@@ -4,6 +4,8 @@
 #include <stdint.h>
 #include <sys/types.h>
 
+#include "params.h"
+
 #define SPLIT_FLAG_DISORDER	0x01
 #define SPLIT_FLAG_OOB		0x02
 
@@ -14,10 +16,14 @@ typedef struct
 	t_l7proto l7proto;
 	bool bFirstReplyChecked;
 	bool bTamperInCutoff;
+	bool b_ah_check;
 	char *hostname;
+	struct desync_profile *dp;		// desync profile cache
 } t_ctrack;
 
-void tamper_out(t_ctrack *ctrack, uint8_t *segment,size_t segment_buffer_size,size_t *size, size_t *split_pos, uint8_t *split_flags);
+void apply_desync_profile(t_ctrack *ctrack, const struct sockaddr *dest);
+
+void tamper_out(t_ctrack *ctrack, const struct sockaddr *dest, uint8_t *segment,size_t segment_buffer_size,size_t *size, size_t *split_pos, uint8_t *split_flags);
 void tamper_in(t_ctrack *ctrack, uint8_t *segment,size_t segment_buffer_size,size_t *size);
 // connection reset by remote leg
 void rst_in(t_ctrack *ctrack);

tpws/tpws.c

@@ -46,8 +46,7 @@ bool bHup = false;
 static void onhup(int sig)
 {
 	printf("HUP received !\n");
-	if (params.hostlist || params.hostlist_exclude)
+	printf("Will reload hostlist on next request (if any)\n");
-		printf("Will reload hostlists on next request\n");
 	bHup = true;
 }
 // should be called in normal execution
@@ -67,7 +66,14 @@ void dohup(void)
 static void onusr2(int sig)
 {
 	printf("\nHOSTFAIL POOL DUMP\n");
-	HostFailPoolDump(params.hostlist_auto_fail_counters);
+
+	struct desync_profile_list *dpl;
+	LIST_FOREACH(dpl, &params.desync_profiles, next)
+	{
+		printf("\nDESYNC PROFILE %d\n",dpl->dp.n);
+		HostFailPoolDump(dpl->dp.hostlist_auto_fail_counters);
+	}
+
 	printf("\n");
 }
 
@@ -170,7 +176,11 @@ static void exithelp(void)
 #endif
 		" --debug=0|1|2|syslog|@<filename>\t; 1 and 2 means log to console and set debug level. for other targets use --debug-level.\n"
 		" --debug-level=0|1|2\t\t\t; specify debug level\n"
-		"\nFILTER:\n"
+		"\nMULTI-STRATEGY:\n"
+		" --new\t\t\t\t\t; begin new strategy\n"
+		" --filter-l3=ipv4|ipv6\t\t\t; L3 protocol filter. multiple comma separated values allowed.\n"
+		" --filter-tcp=[~]port1[-port2]\t\t; TCP port filter. ~ means negation\n"
+		"\nHOSTLIST FILTER:\n"
 		" --hostlist=<filename>\t\t\t; only act on hosts in the list (one host per line, subdomains auto apply, gzip supported, multiple hostlists allowed)\n"
 		" --hostlist-exclude=<filename>\t\t; do not act on hosts in the list (one host per line, subdomains auto apply, gzip supported, multiple hostlists allowed)\n"
 		" --hostlist-auto=<filename>\t\t; detect DPI blocks and build hostlist automatically\n"
@@ -203,7 +213,6 @@ static void exithelp(void)
 		" --tlsrec-pos=<pos>\t\t\t; make 2 TLS records. split at specified pos\n"
 #ifdef __linux__
 		" --mss=<int>\t\t\t\t; set client MSS. forces server to split messages but significantly decreases speed !\n"
-		" --mss-pf=[~]port1[-port2]\t\t; MSS port filter. ~ means negation\n"
 #endif
 		" --tamper-start=[n]<pos>\t\t; start tampering only from specified outbound stream position. default is 0. 'n' means data block number.\n"
 		" --tamper-cutoff=[n]<pos>\t\t; do not tamper anymore after specified outbound stream position. default is unlimited.\n",
@@ -216,11 +225,7 @@ static void exithelp(void)
 }
 static void cleanup_params(void)
 {
-	strlist_destroy(&params.hostlist_files);
+	dp_list_destroy(&params.desync_profiles);
-	strlist_destroy(&params.hostlist_exclude_files);
-	StrPoolDestroy(&params.hostlist_exclude);
-	StrPoolDestroy(&params.hostlist);
-	HostFailPoolDestroy(&params.hostlist_auto_fail_counters);
 }
 static void exithelp_clean(void)
 {
@@ -285,6 +290,32 @@ bool parse_tlspos(const char *s, enum tlspos *pos)
 	return true;
 }
 
+static bool wf_make_l3(char *opt, bool *ipv4, bool *ipv6)
+{
+	char *e,*p,c;
+
+	for (p=opt,*ipv4=*ipv6=false ; p ; )
+	{
+		if ((e = strchr(p,',')))
+		{
+			c=*e;
+			*e=0;
+		}
+
+		if (!strcmp(p,"ipv4"))
+			*ipv4 = true;
+		else if (!strcmp(p,"ipv6"))
+			*ipv6 = true;
+		else return false;
+
+		if (e)
+		{
+			*e++=c;
+		}
+		p = e;
+	}
+	return true;
+}
 
 void parse_params(int argc, char *argv[])
 {
@@ -292,18 +323,13 @@ void parse_params(int argc, char *argv[])
 	int v, i;
 
 	memset(&params, 0, sizeof(params));
-	memcpy(params.hostspell, "host", 4); // default hostspell
 	params.maxconn = DEFAULT_MAX_CONN;
 	params.max_orphan_time = DEFAULT_MAX_ORPHAN_TIME;
 	params.binds_last = -1;
-	params.hostlist_auto_fail_threshold = HOSTLIST_AUTO_FAIL_THRESHOLD_DEFAULT;
-	params.hostlist_auto_fail_time = HOSTLIST_AUTO_FAIL_TIME_DEFAULT;
 #if defined(__linux__) || defined(__APPLE__)
 	params.tcp_user_timeout_local = DEFAULT_TCP_USER_TIMEOUT_LOCAL;
 	params.tcp_user_timeout_remote = DEFAULT_TCP_USER_TIMEOUT_REMOTE;
 #endif
-	LIST_INIT(&params.hostlist_files);
-	LIST_INIT(&params.hostlist_exclude_files);
 
 #if defined(__OpenBSD__) || defined(__APPLE__)
 	params.pf_enable = true; // OpenBSD and MacOS have no other choice
@@ -314,6 +340,17 @@ void parse_params(int argc, char *argv[])
 	    params.droproot = true;
 	}
 
+	struct desync_profile_list *dpl;
+	struct desync_profile *dp;
+	int desync_profile_count=0;
+	if (!(dpl = dp_list_add(&params.desync_profiles)))
+	{
+		DLOG_ERR("desync_profile_add: out of memory\n");
+		exit_clean(1);
+	}
+	dp = &dpl->dp;
+	dp->n = ++desync_profile_count;
+	
 	const struct option long_options[] = {
 		{ "help",no_argument,0,0 },// optidx=0
 		{ "h",no_argument,0,0 },// optidx=1
@@ -371,18 +408,22 @@ void parse_params(int argc, char *argv[])
 		{ "tamper-start",required_argument,0,0 },// optidx=53
 		{ "tamper-cutoff",required_argument,0,0 },// optidx=54
 		{ "connect-bind-addr",required_argument,0,0 },// optidx=55
+
+		{ "new",no_argument,0,0 },		// optidx=56
+		{ "filter-l3",required_argument,0,0 },	// optidx=57
+		{ "filter-tcp",required_argument,0,0 },	// optidx=58
+
 #if defined(__FreeBSD__)
-		{ "enable-pf",no_argument,0,0 },// optidx=56
+		{ "enable-pf",no_argument,0,0 },// optidx=59
 #elif defined(__APPLE__)
-		{ "local-tcp-user-timeout",required_argument,0,0 },// optidx=56
+		{ "local-tcp-user-timeout",required_argument,0,0 },// optidx=59
-		{ "remote-tcp-user-timeout",required_argument,0,0 },// optidx=57
+		{ "remote-tcp-user-timeout",required_argument,0,0 },// optidx=60
 #elif defined(__linux__)
-		{ "local-tcp-user-timeout",required_argument,0,0 },// optidx=56
+		{ "local-tcp-user-timeout",required_argument,0,0 },// optidx=59
-		{ "remote-tcp-user-timeout",required_argument,0,0 },// optidx=57
+		{ "remote-tcp-user-timeout",required_argument,0,0 },// optidx=60
-		{ "mss",required_argument,0,0 },// optidx=58
+		{ "mss",required_argument,0,0 },// optidx=61
-		{ "mss-pf",required_argument,0,0 },// optidx=59
 #ifdef SPLICE_PRESENT
-		{ "nosplice",no_argument,0,0 },// optidx=60
+		{ "nosplice",no_argument,0,0 },// optidx=62
 #endif
 #endif
 		{ "hostlist-auto-retrans-threshold",optional_argument,0,0}, // ignored. for nfqws command line compatibility
@@ -513,7 +554,7 @@ void parse_params(int argc, char *argv[])
 			}
 			break;
 		case 17: /* hostcase */
-			params.hostcase = true;
+			dp->hostcase = true;
 			params.tamper = true;
 			break;
 		case 18: /* hostspell */
@@ -522,28 +563,28 @@ void parse_params(int argc, char *argv[])
 				DLOG_ERR("hostspell must be exactly 4 chars long\n");
 				exit_clean(1);
 			}
-			params.hostcase = true;
+			dp->hostcase = true;
-			memcpy(params.hostspell, optarg, 4);
+			memcpy(dp->hostspell, optarg, 4);
 			params.tamper = true;
 			break;
 		case 19: /* hostdot */
-			params.hostdot = true;
+			dp->hostdot = true;
 			params.tamper = true;
 			break;
 		case 20: /* hostnospace */
-			params.hostnospace = true;
+			dp->hostnospace = true;
 			params.tamper = true;
 			break;
 		case 21: /* hostpad */
-			params.hostpad = atoi(optarg);
+			dp->hostpad = atoi(optarg);
 			params.tamper = true;
 			break;
 		case 22: /* domcase */
-			params.domcase = true;
+			dp->domcase = true;
 			params.tamper = true;
 			break;
 		case 23: /* split-http-req */
-			if (!parse_httpreqpos(optarg, &params.split_http_req))
+			if (!parse_httpreqpos(optarg, &dp->split_http_req))
 			{
 				DLOG_ERR("Invalid argument for split-http-req\n");
 				exit_clean(1);
@@ -551,7 +592,7 @@ void parse_params(int argc, char *argv[])
 			params.tamper = true;
 			break;
 		case 24: /* split-tls */
-			if (!parse_tlspos(optarg, &params.split_tls))
+			if (!parse_tlspos(optarg, &dp->split_tls))
 			{
 				DLOG_ERR("Invalid argument for split-tls\n");
 				exit_clean(1);
@@ -561,7 +602,7 @@ void parse_params(int argc, char *argv[])
 		case 25: /* split-pos */
 			i = atoi(optarg);
 			if (i>0)
-				params.split_pos = i;
+				dp->split_pos = i;
 			else
 			{
 				DLOG_ERR("Invalid argument for split-pos\n");
@@ -570,13 +611,13 @@ void parse_params(int argc, char *argv[])
 			params.tamper = true;
 			break;
 		case 26: /* split-any-protocol */
-			params.split_any_protocol = true;
+			dp->split_any_protocol = true;
 			break;
 		case 27: /* disorder */
 			if (optarg)
 			{
-				if (!strcmp(optarg,"http")) params.disorder_http=true;
+				if (!strcmp(optarg,"http")) dp->disorder_http=true;
-				else if (!strcmp(optarg,"tls")) params.disorder_tls=true;
+				else if (!strcmp(optarg,"tls")) dp->disorder_tls=true;
 				else
 				{
 					DLOG_ERR("Invalid argument for disorder\n");
@@ -584,14 +625,14 @@ void parse_params(int argc, char *argv[])
 				}
 			}
 			else
-				params.disorder = true;
+				dp->disorder = true;
 			save_default_ttl();
 			break;
 		case 28: /* oob */
 			if (optarg)
 			{
-				if (!strcmp(optarg,"http")) params.oob_http=true;
+				if (!strcmp(optarg,"http")) dp->oob_http=true;
-				else if (!strcmp(optarg,"tls")) params.oob_tls=true;
+				else if (!strcmp(optarg,"tls")) dp->oob_tls=true;
 				else
 				{
 					DLOG_ERR("Invalid argument for oob\n");
@@ -599,39 +640,39 @@ void parse_params(int argc, char *argv[])
 				}
 			}
 			else
-				params.oob = true;
+				dp->oob = true;
 			break;
 		case 29: /* oob-data */
 			{
 				size_t l = strlen(optarg);
 				unsigned int bt;
-				if (l==1) params.oob_byte = (uint8_t)*optarg;
+				if (l==1) dp->oob_byte = (uint8_t)*optarg;
 				else if (l!=4 || sscanf(optarg,"0x%02X",&bt)!=1)
 				{
 					DLOG_ERR("Invalid argument for oob-data\n");
 					exit_clean(1);
 				}
-				else params.oob_byte = (uint8_t)bt;
+				else dp->oob_byte = (uint8_t)bt;
 			}
 			break;
 		case 30: /* methodspace */
-			params.methodspace = true;
+			dp->methodspace = true;
 			params.tamper = true;
 			break;
 		case 31: /* methodeol */
-			params.methodeol = true;
+			dp->methodeol = true;
 			params.tamper = true;
 			break;
 		case 32: /* hosttab */
-			params.hosttab = true;
+			dp->hosttab = true;
 			params.tamper = true;
 			break;
 		case 33: /* unixeol */
-			params.unixeol = true;
+			dp->unixeol = true;
 			params.tamper = true;
 			break;
 		case 34: /* tlsrec */
-			if (!parse_tlspos(optarg, &params.tlsrec))
+			if (!parse_tlspos(optarg, &dp->tlsrec))
 			{
 				DLOG_ERR("Invalid argument for tlsrec\n");
 				exit_clean(1);
@@ -639,8 +680,8 @@ void parse_params(int argc, char *argv[])
 			params.tamper = true;
 			break;
 		case 35: /* tlsrec-pos */
-			if ((params.tlsrec_pos = atoi(optarg))>0)
+			if ((dp->tlsrec_pos = atoi(optarg))>0)
-				params.tlsrec = tlspos_pos;
+				dp->tlsrec = tlspos_pos;
 			else
 			{
 				DLOG_ERR("Invalid argument for tlsrec-pos\n");
@@ -649,7 +690,7 @@ void parse_params(int argc, char *argv[])
 			params.tamper = true;
 			break;
 		case 36: /* hostlist */
-			if (!strlist_add(&params.hostlist_files, optarg))
+			if (!strlist_add(&dp->hostlist_files, optarg))
 			{
 				DLOG_ERR("strlist_add failed\n");
 				exit_clean(1);
@@ -657,7 +698,7 @@ void parse_params(int argc, char *argv[])
 			params.tamper = true;
 			break;
 		case 37: /* hostlist-exclude */
-			if (!strlist_add(&params.hostlist_exclude_files, optarg))
+			if (!strlist_add(&dp->hostlist_exclude_files, optarg))
 			{
 				DLOG_ERR("strlist_add failed\n");
 				exit_clean(1);
@@ -665,9 +706,9 @@ void parse_params(int argc, char *argv[])
 			params.tamper = true;
 			break;
 		case 38: /* hostlist-auto */
-			if (*params.hostlist_auto_filename)
+			if (*dp->hostlist_auto_filename)
 			{
-				DLOG_ERR("only one auto hostlist is supported\n");
+				DLOG_ERR("only one auto hostlist per profile is supported\n");
 				exit_clean(1);
 			}
 			{
@@ -687,26 +728,26 @@ void parse_params(int argc, char *argv[])
 				if (params.droproot && chown(optarg, params.uid, -1))
 					DLOG_ERR("could not chown %s. auto hostlist file may not be writable after privilege drop\n", optarg);
 			}
-			if (!strlist_add(&params.hostlist_files, optarg))
+			if (!strlist_add(&dp->hostlist_files, optarg))
 			{
 				DLOG_ERR("strlist_add failed\n");
 				exit_clean(1);
 			}
-			strncpy(params.hostlist_auto_filename, optarg, sizeof(params.hostlist_auto_filename));
+			strncpy(dp->hostlist_auto_filename, optarg, sizeof(dp->hostlist_auto_filename));
-			params.hostlist_auto_filename[sizeof(params.hostlist_auto_filename) - 1] = '\0';
+			dp->hostlist_auto_filename[sizeof(dp->hostlist_auto_filename) - 1] = '\0';
 			params.tamper = true; // need to detect blocks and update autohostlist. cannot just slice.
 			break;
 		case 39: /* hostlist-auto-fail-threshold */
-			params.hostlist_auto_fail_threshold = (uint8_t)atoi(optarg);
+			dp->hostlist_auto_fail_threshold = (uint8_t)atoi(optarg);
-			if (params.hostlist_auto_fail_threshold<1 || params.hostlist_auto_fail_threshold>20)
+			if (dp->hostlist_auto_fail_threshold<1 || dp->hostlist_auto_fail_threshold>20)
 			{
 				DLOG_ERR("auto hostlist fail threshold must be within 1..20\n");
 				exit_clean(1);
 			}
 			break;
 		case 40: /* hostlist-auto-fail-time */
-			params.hostlist_auto_fail_time = (uint8_t)atoi(optarg);
+			dp->hostlist_auto_fail_time = (uint8_t)atoi(optarg);
-			if (params.hostlist_auto_fail_time<1)
+			if (dp->hostlist_auto_fail_time<1)
 			{
 				DLOG_ERR("auto hostlist fail time is not valid\n");
 				exit_clean(1);
@@ -820,26 +861,28 @@ void parse_params(int argc, char *argv[])
 				const char *p=optarg;
 				if (*p=='n')
 				{
-					params.tamper_start_n=true;
+					dp->tamper_start_n=true;
 					p++;
 				}
 				else
-					params.tamper_start_n=false;
+					dp->tamper_start_n=false;
-				params.tamper_start = atoi(p);
+				dp->tamper_start = atoi(p);
 			}
+			params.tamper_lim = true;
 			break;
 		case 54: /* tamper-cutoff */
 			{
 				const char *p=optarg;
 				if (*p=='n')
 				{
-					params.tamper_cutoff_n=true;
+					dp->tamper_cutoff_n=true;
 					p++;
 				}
 				else
-					params.tamper_cutoff_n=false;
+					dp->tamper_cutoff_n=false;
-				params.tamper_cutoff = atoi(p);
+				dp->tamper_cutoff = atoi(p);
 			}
+			params.tamper_lim = true;
 			break;
 		case 55: /* connect-bind-addr */
 			{
@@ -868,12 +911,37 @@ void parse_params(int argc, char *argv[])
 			}
 			break;
 
+
+		case 56: /* new */
+			if (!(dpl = dp_list_add(&params.desync_profiles)))
+			{
+				DLOG_ERR("desync_profile_add: out of memory\n");
+				exit_clean(1);
+			}
+			dp = &dpl->dp;
+			dp->n = ++desync_profile_count;
+			break;
+		case 57: /* filter-l3 */
+			if (!wf_make_l3(optarg,&dp->filter_ipv4,&dp->filter_ipv6))
+			{
+				DLOG_ERR("bad value for --filter-l3\n");
+				exit_clean(1);
+			}
+			break;
+		case 58: /* filter-tcp */
+			if (!pf_parse(optarg,&dp->pf_tcp))
+			{
+				DLOG_ERR("Invalid port filter : %s\n",optarg);
+				exit_clean(1);
+			}
+			break;
+			
 #if defined(__FreeBSD__)
-		case 56: /* enable-pf */
+		case 59: /* enable-pf */
 			params.pf_enable = true;
 			break;
 #elif defined(__linux__) || defined(__APPLE__)
-		case 56: /* local-tcp-user-timeout */
+		case 59: /* local-tcp-user-timeout */
 			params.tcp_user_timeout_local = atoi(optarg);
 			if (params.tcp_user_timeout_local<0 || params.tcp_user_timeout_local>86400)
 			{
@@ -881,7 +949,7 @@ void parse_params(int argc, char *argv[])
 				exit_clean(1);
 			}
 			break;
-		case 57: /* remote-tcp-user-timeout */
+		case 60: /* remote-tcp-user-timeout */
 			params.tcp_user_timeout_remote = atoi(optarg);
 			if (params.tcp_user_timeout_remote<0 || params.tcp_user_timeout_remote>86400)
 			{
@@ -892,24 +960,17 @@ void parse_params(int argc, char *argv[])
 #endif
 
 #if defined(__linux__)
-		case 58: /* mss */
+		case 61: /* mss */
 			// this option does not work in any BSD and MacOS. OS may accept but it changes nothing
-			params.mss = atoi(optarg);
+			dp->mss = atoi(optarg);
-			if (params.mss<88 || params.mss>32767)
+			if (dp->mss<88 || dp->mss>32767)
 			{
 				DLOG_ERR("Invalid value for MSS. Linux accepts MSS 88-32767.\n");
 				exit_clean(1);
 			}
 			break;
-		case 59: /* mss-pf */
-			if (!pf_parse(optarg,&params.mss_pf))
-			{
-				DLOG_ERR("Invalid MSS port filter.\n");
-				exit_clean(1);
-			}
-			break;
 #ifdef SPLICE_PRESENT
-		case 60: /* nosplice */
+		case 62: /* nosplice */
 			params.nosplice = true;
 			break;
 #endif
@@ -925,22 +986,36 @@ void parse_params(int argc, char *argv[])
 	{
 		params.binds_last=0; // default bind to all
 	}
-	if (params.skip_nodelay && (params.split_http_req || params.split_pos))
+	if (!params.resolver_threads) params.resolver_threads = 5 + params.maxconn/50;
+	
+	VPRINT("adding low-priority default empty desync profile\n");
+	// add default empty profile
+	if (!(dpl = dp_list_add(&params.desync_profiles)))
 	{
-		DLOG_ERR("Cannot split with --skip-nodelay\n");
+		DLOG_ERR("desync_profile_add: out of memory\n");
 		exit_clean(1);
 	}
-	if (!params.resolver_threads) params.resolver_threads = 5 + params.maxconn/50;
-	if (params.split_tls==tlspos_none && params.split_pos) params.split_tls=tlspos_pos;
-	if (params.split_http_req==httpreqpos_none && params.split_pos) params.split_http_req=httpreqpos_pos;
 
-	if (*params.hostlist_auto_filename) params.hostlist_auto_mod_time = file_mod_time(params.hostlist_auto_filename);
+	DLOG_CONDUP("we have %d user defined desync profile(s) and default low priority profile 0\n",desync_profile_count);
+
+	LIST_FOREACH(dpl, &params.desync_profiles, next)
+	{
+		dp = &dpl->dp;
+		if (dp->split_tls==tlspos_none && dp->split_pos) dp->split_tls=tlspos_pos;
+		if (dp->split_http_req==httpreqpos_none && dp->split_pos) dp->split_http_req=httpreqpos_pos;
+		if (*dp->hostlist_auto_filename) dp->hostlist_auto_mod_time = file_mod_time(dp->hostlist_auto_filename);
+		if (params.skip_nodelay && (dp->split_tls || dp->split_http_req || dp->split_pos))
+		{
+			DLOG_ERR("Cannot split with --skip-nodelay\n");
+			exit_clean(1);
+		}
+	}
+
 	if (!LoadIncludeHostLists())
 	{
 		DLOG_ERR("Include hostlist load failed\n");
 		exit_clean(1);
 	}
-	if (*params.hostlist_auto_filename) NonEmptyHostlist(&params.hostlist);
 	if (!LoadExcludeHostLists())
 	{
 		DLOG_ERR("Exclude hostlist load failed\n");
@@ -1057,7 +1132,7 @@ static bool set_ulimit(void)
 		// additional 1/2 for unpaired remote legs sending buffers
 		// 16 for listen_fd, epoll, hostlist, ...
 #ifdef SPLICE_PRESENT
-		fdmax = (params.nosplice ? 2 : (params.tamper && !params.tamper_start && !params.tamper_cutoff ? 4 : 6)) * params.maxconn;
+		fdmax = (params.nosplice ? 2 : (params.tamper && !params.tamper_lim ? 4 : 6)) * params.maxconn;
 #else
 		fdmax = 2 * params.maxconn;
 #endif

tpws/tpws_conn.c

@@ -368,7 +368,7 @@ static void set_user_timeout(int fd, int timeout)
 //Createas a socket and initiates the connection to the host specified by 
 //remote_addr.
 //Returns -1 if something fails, >0 on success (socket fd).
-static int connect_remote(const struct sockaddr *remote_addr, bool bApplyConnectionFooling)
+static int connect_remote(const struct sockaddr *remote_addr, int mss)
 {
 	int remote_fd = 0, yes = 1, no = 0;
     
@@ -406,24 +406,18 @@ static int connect_remote(const struct sockaddr *remote_addr, bool bApplyConnect
 		close(remote_fd);
 		return -1;
 	}
-	if (bApplyConnectionFooling && params.mss)
+#ifdef __linux__
+	if (mss)
 	{
-		uint16_t port = saport(remote_addr);
+		VPRINT("Setting MSS %d\n", mss);
-		if (pf_in_range(port,&params.mss_pf))
+		if (setsockopt(remote_fd, IPPROTO_TCP, TCP_MAXSEG, &mss, sizeof(int)) <0)
 		{
-			VPRINT("Setting MSS %d\n",params.mss);
+			DLOG_PERROR("setsockopt (TCP_MAXSEG, connect_remote)");
-			if (setsockopt(remote_fd, IPPROTO_TCP, TCP_MAXSEG, &params.mss, sizeof(int)) <0)
+			close(remote_fd);
-			{
+			return -1;
-				DLOG_PERROR("setsockopt (TCP_MAXSEG, connect_remote)");
-				close(remote_fd);
-				return -1;
-			}
-		}
-		else
-		{
-			VPRINT("Not setting MSS. Port %u is out of MSS port range.\n",port);
 		}
 	}
+#endif
 
 	// if no bind address specified - address family will be 0 in params_connect_bindX
 	if(remote_addr->sa_family == params.connect_bind4.sin_family)
@@ -494,13 +488,12 @@ static tproxy_conn_t *new_conn(int fd, bool remote)
 	tproxy_conn_t *conn;
 
 	//Create connection object and fill in information
-	if((conn = (tproxy_conn_t*) malloc(sizeof(tproxy_conn_t))) == NULL)
+	if((conn = (tproxy_conn_t*) calloc(1, sizeof(tproxy_conn_t))) == NULL)
 	{
 		DLOG_ERR("Could not allocate memory for connection\n");
 		return NULL;
 	}
 
-	memset(conn, 0, sizeof(tproxy_conn_t));
 	conn->state = CONN_UNAVAILABLE;
 	conn->fd = fd;
 	conn->remote = remote;
@@ -508,7 +501,7 @@ static tproxy_conn_t *new_conn(int fd, bool remote)
 #ifdef SPLICE_PRESENT
 	// if dont tamper - both legs are spliced, create 2 pipes
 	// otherwise create pipe only in local leg
-	if (!params.nosplice && ( !remote || !params.tamper || params.tamper_start || params.tamper_cutoff ) && pipe2(conn->splice_pipe, O_NONBLOCK) != 0)
+	if (!params.nosplice && ( !remote || !params.tamper || params.tamper_lim ) && pipe2(conn->splice_pipe, O_NONBLOCK) != 0)
 	{
 		DLOG_ERR("Could not create the splice pipe\n");
 		free_conn(conn);
@@ -606,7 +599,7 @@ static tproxy_conn_t* add_tcp_connection(int efd, struct tailhead *conn_list,int
 
 	if (proxy_type==CONN_TYPE_TRANSPARENT)
 	{
-		if ((remote_fd = connect_remote((struct sockaddr *)&orig_dst, true)) < 0)
+		if ((remote_fd = connect_remote((struct sockaddr *)&orig_dst, 0)) < 0)
 		{
 			DLOG_ERR("Failed to connect\n");
 			close(local_fd);
@@ -626,6 +619,8 @@ static tproxy_conn_t* add_tcp_connection(int efd, struct tailhead *conn_list,int
 
 	if (proxy_type==CONN_TYPE_TRANSPARENT)
 	{
+		sacopy(&conn->dest, (struct sockaddr *)&orig_dst);
+
 		if(!(conn->partner = new_conn(remote_fd, true)))
 		{
 			free_conn(conn);
@@ -667,6 +662,10 @@ static tproxy_conn_t* add_tcp_connection(int efd, struct tailhead *conn_list,int
 		TAILQ_INSERT_HEAD(conn_list, conn->partner, conn_ptrs);
 		legs_remote++;
 	}
+	
+	if (proxy_type==CONN_TYPE_TRANSPARENT)
+		apply_desync_profile(&conn->track, (struct sockaddr *)&conn->dest);
+
 	return conn;
 } 
 
@@ -782,32 +781,26 @@ static bool handle_unsent(tproxy_conn_t *conn)
 }
 
 
-bool proxy_mode_connect_remote(const struct sockaddr *sa, tproxy_conn_t *conn, struct tailhead *conn_list)
+static bool proxy_mode_connect_remote(tproxy_conn_t *conn, struct tailhead *conn_list)
 {
 	int remote_fd;
 
 	if (params.debug>=1)
 	{
 		char ip_port[48];
-		ntop46_port(sa,ip_port,sizeof(ip_port));
+		ntop46_port((struct sockaddr *)&conn->dest,ip_port,sizeof(ip_port));
 		VPRINT("socks target for fd=%d is : %s\n", conn->fd, ip_port);
 	}
-	if (check_local_ip((struct sockaddr *)sa))
+	if (check_local_ip((struct sockaddr *)&conn->dest))
 	{
 		VPRINT("Dropping connection to local address for security reasons\n");
 		socks_send_rep(conn->socks_ver, conn->fd, S5_REP_NOT_ALLOWED_BY_RULESET);
 		return false;
 	}
 
-	bool bConnFooling=true;
+	apply_desync_profile(&conn->track, (struct sockaddr *)&conn->dest);
-	if (conn->track.hostname && params.mss)
-	{
-		bConnFooling=HostlistCheck(conn->track.hostname, NULL);
-		if (!bConnFooling)
-			VPRINT("0-phase desync hostlist check negative. not acting on this connection.\n");
-	}
 
-	if ((remote_fd = connect_remote(sa, bConnFooling)) < 0)
+	if ((remote_fd = connect_remote((struct sockaddr *)&conn->dest, conn->track.dp ? conn->track.dp->mss : 0)) < 0)
 	{
 		DLOG_ERR("socks failed to connect (1) errno=%d\n", errno);
 		socks_send_rep_errno(conn->socks_ver, conn->fd, errno);
@@ -845,7 +838,6 @@ static bool handle_proxy_mode(tproxy_conn_t *conn, struct tailhead *conn_list)
 
 	ssize_t rd,wr;
 	char buf[sizeof(s5_req)]; // s5_req - the largest possible req
-	struct sockaddr_storage ss;
 
 	// receive proxy control message
 	rd=recv(conn->fd, buf, sizeof(buf), MSG_DONTWAIT);
@@ -928,10 +920,10 @@ static bool handle_proxy_mode(tproxy_conn_t *conn, struct tailhead *conn_list)
 							socks4_send_rep(conn->fd, S4_REP_FAILED);
 							return false;
 						}
-						ss.ss_family = AF_INET;
+						conn->dest.ss_family = AF_INET;
-						((struct sockaddr_in*)&ss)->sin_port = m->port;
+						((struct sockaddr_in*)&conn->dest)->sin_port = m->port;
-						((struct sockaddr_in*)&ss)->sin_addr.s_addr = m->ip;
+						((struct sockaddr_in*)&conn->dest)->sin_addr.s_addr = m->ip;
-						return proxy_mode_connect_remote((struct sockaddr *)&ss, conn, conn_list);
+						return proxy_mode_connect_remote(conn, conn_list);
 					}
 					break;
 				case S_WAIT_REQUEST:
@@ -960,16 +952,16 @@ static bool handle_proxy_mode(tproxy_conn_t *conn, struct tailhead *conn_list)
 						switch(m->atyp)
 						{
 							case S5_ATYP_IP4:
-								ss.ss_family = AF_INET;
+								conn->dest.ss_family = AF_INET;
-								((struct sockaddr_in*)&ss)->sin_port = m->d4.port;
+								((struct sockaddr_in*)&conn->dest)->sin_port = m->d4.port;
-								((struct sockaddr_in*)&ss)->sin_addr = m->d4.addr;
+								((struct sockaddr_in*)&conn->dest)->sin_addr = m->d4.addr;
 								break;
 							case S5_ATYP_IP6:
-								ss.ss_family = AF_INET6;
+								conn->dest.ss_family = AF_INET6;
-								((struct sockaddr_in6*)&ss)->sin6_port = m->d6.port;
+								((struct sockaddr_in6*)&conn->dest)->sin6_port = m->d6.port;
-								((struct sockaddr_in6*)&ss)->sin6_addr = m->d6.addr;
+								((struct sockaddr_in6*)&conn->dest)->sin6_addr = m->d6.addr;
-								((struct sockaddr_in6*)&ss)->sin6_flowinfo = 0;
+								((struct sockaddr_in6*)&conn->dest)->sin6_flowinfo = 0;
-								((struct sockaddr_in6*)&ss)->sin6_scope_id = 0;
+								((struct sockaddr_in6*)&conn->dest)->sin6_scope_id = 0;
 								break;
 							case S5_ATYP_DOM:
 								{
@@ -1006,7 +998,7 @@ static bool handle_proxy_mode(tproxy_conn_t *conn, struct tailhead *conn_list)
 								return false; // should not be here. S5_REQ_CONNECT_VALID checks for valid atyp
 
 						}
-						return proxy_mode_connect_remote((struct sockaddr *)&ss,conn,conn_list);
+						return proxy_mode_connect_remote(conn,conn_list);
 					}
 					break;
 				case S_WAIT_RESOLVE:
@@ -1045,7 +1037,8 @@ static bool resolve_complete(struct resolve_item *ri, struct tailhead *conn_list
 					DBGPRINT("resolve_complete put hostname : %s\n", ri->dom);
 					conn->track.hostname = strdup(ri->dom);
 				}
-				return proxy_mode_connect_remote((struct sockaddr *)&ri->ss,conn,conn_list);
+				sacopy(&conn->dest, (struct sockaddr *)&ri->ss);
+				return proxy_mode_connect_remote(conn,conn_list);
 			}
 		}
 		else
@@ -1060,8 +1053,17 @@ static bool resolve_complete(struct resolve_item *ri, struct tailhead *conn_list
 
 static bool in_tamper_out_range(tproxy_conn_t *conn)
 {
-	return (params.tamper_start_n ? (conn->tnrd+1) : conn->trd) >= params.tamper_start &&
+	if (!conn->track.dp) return true;
-		(!params.tamper_cutoff || (params.tamper_cutoff_n ? (conn->tnrd+1) : conn->trd) < params.tamper_cutoff);
+	bool in_range = \
+		((conn->track.dp->tamper_start_n ? (conn->tnrd+1) : conn->trd) >= conn->track.dp->tamper_start &&
+		 (!conn->track.dp->tamper_cutoff || (conn->track.dp->tamper_cutoff_n ? (conn->tnrd+1) : conn->trd) < conn->track.dp->tamper_cutoff));
+	DBGPRINT("tamper_out range check. stream pos %" PRIu64 "(n%" PRIu64 "). tamper range %s%u-%s%u (%s)\n",
+		conn->trd, conn->tnrd+1,
+		conn->track.dp ? conn->track.dp->tamper_start_n ? "n" : "" : "?" , conn->track.dp ? conn->track.dp->tamper_start : 0,
+		conn->track.dp ? conn->track.dp->tamper_cutoff_n ? "n" : "" : "?" , conn->track.dp ? conn->track.dp->tamper_cutoff : 0,
+		in_range ? "IN RANGE" : "OUT OF RANGE");
+	return in_range;
+		 
 }
 
 static void tamper(tproxy_conn_t *conn, uint8_t *segment, size_t segment_buffer_size, size_t *segment_size, size_t *split_pos, uint8_t *split_flags)
@@ -1072,33 +1074,26 @@ static void tamper(tproxy_conn_t *conn, uint8_t *segment, size_t segment_buffer_
 		if (conn->remote)
 		{
 			if (conn_partner_alive(conn) && !conn->partner->track.bTamperInCutoff)
-			{
 				tamper_in(&conn->partner->track,segment,segment_buffer_size,segment_size);
-			}
 		}
 		else
 		{
-			bool in_range = in_tamper_out_range(conn);
+			if (in_tamper_out_range(conn))
-			DBGPRINT("tamper_out stream pos %" PRIu64 "(n%" PRIu64 "). tamper range %s%u-%s%u (%s)\n",
+				tamper_out(&conn->track,(struct sockaddr*)&conn->dest,segment,segment_buffer_size,segment_size,split_pos,split_flags);
-				conn->trd, conn->tnrd+1,
-				params.tamper_start_n ? "n" : "" , params.tamper_start,
-				params.tamper_cutoff_n ? "n" : "" , params.tamper_cutoff,
-				in_range ? "IN RANGE" : "OUT OF RANGE");
-			if (in_range) tamper_out(&conn->track,segment,segment_buffer_size,segment_size,split_pos,split_flags);
 		}
 	}
 }
 
 // buffer must have at least one extra byte for OOB
-static ssize_t send_or_buffer_oob(send_buffer_t *sb, int fd, uint8_t *buf, size_t len, int ttl, bool oob)
+static ssize_t send_or_buffer_oob(send_buffer_t *sb, int fd, uint8_t *buf, size_t len, int ttl, bool oob, uint8_t oob_byte)
 {
 	ssize_t wr;
 	if (oob)
 	{
-		VPRINT("Sending OOB byte %02X\n", params.oob_byte);
+		VPRINT("Sending OOB byte %02X\n", oob_byte);
 		uint8_t oob_save;
 		oob_save = buf[len];
-		buf[len] = params.oob_byte;
+		buf[len] = oob_byte;
 		wr = send_or_buffer(sb, fd, buf, len+1, MSG_OOB, ttl);
 		buf[len] = oob_save;
 	}
@@ -1211,7 +1206,7 @@ static bool handle_epoll(tproxy_conn_t *conn, struct tailhead *conn_list, uint32
 				{
 					VPRINT("Splitting at pos %zu%s\n", split_pos, (split_flags & SPLIT_FLAG_DISORDER) ? " with disorder" : "");
 
-					wr = send_or_buffer_oob(conn->partner->wr_buf, conn->partner->fd, buf, split_pos, !!(split_flags & SPLIT_FLAG_DISORDER), !!(split_flags & SPLIT_FLAG_OOB));
+					wr = send_or_buffer_oob(conn->partner->wr_buf, conn->partner->fd, buf, split_pos, !!(split_flags & SPLIT_FLAG_DISORDER), !!(split_flags & SPLIT_FLAG_OOB), conn->track.dp ? conn->track.dp->oob_byte : 0);
 					DBGPRINT("send_or_buffer(1) fd=%d wr=%zd err=%d\n",conn->partner->fd,wr,errno);
 					if (wr >= 0)
 					{

tpws/tpws_conn.h

@@ -54,6 +54,7 @@ struct tproxy_conn
 	int splice_pipe[2];
 	conn_state_t state;
 	conn_type_t conn_type;
+	struct sockaddr_storage dest;
 
 	struct tproxy_conn *partner; // other leg
 	time_t orphan_since;