diff --git a/ip2net/ip2net.c b/ip2net/ip2net.c
index 41011b2..793ee72 100644
--- a/ip2net/ip2net.c
+++ b/ip2net/ip2net.c
@@ -280,7 +280,7 @@ static void parse_params(int argc, char *argv[])
 			break;
 		}
 	}
-	if (plen1 != -1 && (!params.ipv6 && (plen1>31 || plen2>31) || params.ipv6 && (plen1>127 || plen2>127)))
+	if (plen1 != -1 && ((!params.ipv6 && (plen1>31 || plen2>31)) || (params.ipv6 && (plen1>127 || plen2>127))))
 	{
 		fprintf(stderr, "invalid parameter for prefix-length\n");
 		exit(1);
diff --git a/nfq/conntrack.c b/nfq/conntrack.c
index 58226fd..62a79db 100644
--- a/nfq/conntrack.c
+++ b/nfq/conntrack.c
@@ -249,7 +249,7 @@ static bool ConntrackPoolFeedPool(t_conntrack_pool **pp, const struct ip *ip, co
 		}
 	}
 	b_rev = tcphdr && tcp_synack_segment(tcphdr);
-	if (tcphdr && tcp_syn_segment(tcphdr) || b_rev || udphdr)
+	if ((tcphdr && tcp_syn_segment(tcphdr)) || b_rev || udphdr)
 	{
 		if ((ctr=ConntrackNew(pp, b_rev ? &connswp : &conn)))
 		{
@@ -297,12 +297,12 @@ void ConntrackPoolPurge(t_conntrack *p)
 		HASH_ITER(hh, p->pool , t, tmp) {
 			tidle = tnow - t->track.t_last;
 			if (	t->track.b_cutoff ||
-				t->conn.l4proto==IPPROTO_TCP && (
-					t->track.state==SYN && tidle>=p->timeout_syn ||
-					t->track.state==ESTABLISHED && tidle>=p->timeout_established ||
-					t->track.state==FIN && tidle>=p->timeout_fin) ||
-				t->conn.l4proto==IPPROTO_UDP &&
-					tidle>=p->timeout_udp)
+				(t->conn.l4proto==IPPROTO_TCP && (
+					(t->track.state==SYN && tidle>=p->timeout_syn) ||
+					(t->track.state==ESTABLISHED && tidle>=p->timeout_established) ||
+					(t->track.state==FIN && tidle>=p->timeout_fin))
+				) || (t->conn.l4proto==IPPROTO_UDP && tidle>=p->timeout_udp)
+			)
 			{
 				HASH_DEL(p->pool, t); ConntrackFreeElem(t); 
 			}
diff --git a/nfq/helpers.c b/nfq/helpers.c
index 29ac6c8..60a32be 100644
--- a/nfq/helpers.c
+++ b/nfq/helpers.c
@@ -239,7 +239,7 @@ void phton64(uint8_t *p, uint64_t v)
 
 bool seq_within(uint32_t s, uint32_t s1, uint32_t s2)
 {
-	return s2>=s1 && s>=s1 && s<=s2 || s2<s1 && (s<=s2 || s>=s1);
+	return (s2>=s1 && s>=s1 && s<=s2) || (s2<s1 && (s<=s2 || s>=s1));
 }
 
 bool ipv6_addr_is_zero(const struct in6_addr *a)
@@ -313,7 +313,7 @@ time_t file_mod_time(const char *filename)
 
 bool pf_in_range(uint16_t port, const port_filter *pf)
 {
-	return port && ((!pf->from && !pf->to || port>=pf->from && port<=pf->to) ^ pf->neg);
+	return port && (((!pf->from && !pf->to) || (port>=pf->from && port<=pf->to)) ^ pf->neg);
 }
 bool pf_parse(const char *s, port_filter *pf)
 {
diff --git a/nfq/nfqws.c b/nfq/nfqws.c
index d6caa39..565c951 100644
--- a/nfq/nfqws.c
+++ b/nfq/nfqws.c
@@ -579,7 +579,7 @@ static bool parse_cutoff(const char *opt, unsigned int *value, char *mode)
 }
 static bool parse_badseq_increment(const char *opt, uint32_t *value)
 {
-	if ((opt[0]=='0' && opt[1]=='x' || opt[0]=='-' && opt[1]=='0' && opt[2]=='x') && sscanf(opt+2+(opt[0]=='-'), "%X", (int32_t*)value)>0)
+	if (((opt[0]=='0' && opt[1]=='x') || (opt[0]=='-' && opt[1]=='0' && opt[2]=='x')) && sscanf(opt+2+(opt[0]=='-'), "%X", (int32_t*)value)>0)
 	{
 		if (opt[0]=='-') params.desync_badseq_increment = -params.desync_badseq_increment;
 		return true;
@@ -621,10 +621,10 @@ bool parse_autottl(const char *s, autottl *t)
 		switch (sscanf(s,"%u:%u-%u",&delta,&min,&max))
 		{
 			case 3:
-				if (delta && !max || max>255) return false;
+				if ((delta && !max) || max>255) return false;
 				t->max=(uint8_t)max;
 			case 2:
-				if (delta && !min || min>255 || min>max) return false;
+				if ((delta && !min) || min>255 || min>max) return false;
 				t->min=(uint8_t)min;
 			case 1:
 				if (delta>255) return false;
diff --git a/nfq/protocol.c b/nfq/protocol.c
index 290f878..6a8f2aa 100644
--- a/nfq/protocol.c
+++ b/nfq/protocol.c
@@ -104,7 +104,7 @@ bool HttpReplyLooksLikeDPIRedirect(const uint8_t *data, size_t len, const char *
 	
 	code = HttpReplyCode(data,len);
 	
-	if (code!=302 && code!=307 || !HttpExtractHeader(data,len,"\nLocation:",loc,sizeof(loc))) return false;
+	if ((code!=302 && code!=307) || !HttpExtractHeader(data,len,"\nLocation:",loc,sizeof(loc))) return false;
 
 	// something like : https://censor.net/badpage.php?reason=denied&source=RKN
 		
diff --git a/tpws/helpers.c b/tpws/helpers.c
index 8d02347..ea70898 100644
--- a/tpws/helpers.c
+++ b/tpws/helpers.c
@@ -140,10 +140,10 @@ bool samappedcmp(const struct sockaddr_in *sa1,const struct sockaddr_in6 *sa2)
 }
 bool sacmp(const struct sockaddr *sa1,const struct sockaddr *sa2)
 {
-	return sa1->sa_family==AF_INET && sa2->sa_family==AF_INET && !memcmp(&((struct sockaddr_in*)sa1)->sin_addr,&((struct sockaddr_in*)sa2)->sin_addr,sizeof(struct in_addr)) ||
-		sa1->sa_family==AF_INET6 && sa2->sa_family==AF_INET6 && !memcmp(&((struct sockaddr_in6*)sa1)->sin6_addr,&((struct sockaddr_in6*)sa2)->sin6_addr,sizeof(struct in6_addr)) ||
-		sa1->sa_family==AF_INET && sa2->sa_family==AF_INET6 && samappedcmp((struct sockaddr_in*)sa1,(struct sockaddr_in6*)sa2) ||
-		sa1->sa_family==AF_INET6 && sa2->sa_family==AF_INET && samappedcmp((struct sockaddr_in*)sa2,(struct sockaddr_in6*)sa1);
+	return (sa1->sa_family==AF_INET && sa2->sa_family==AF_INET && !memcmp(&((struct sockaddr_in*)sa1)->sin_addr,&((struct sockaddr_in*)sa2)->sin_addr,sizeof(struct in_addr))) ||
+		(sa1->sa_family==AF_INET6 && sa2->sa_family==AF_INET6 && !memcmp(&((struct sockaddr_in6*)sa1)->sin6_addr,&((struct sockaddr_in6*)sa2)->sin6_addr,sizeof(struct in6_addr))) ||
+		(sa1->sa_family==AF_INET && sa2->sa_family==AF_INET6 && samappedcmp((struct sockaddr_in*)sa1,(struct sockaddr_in6*)sa2)) ||
+		(sa1->sa_family==AF_INET6 && sa2->sa_family==AF_INET && samappedcmp((struct sockaddr_in*)sa2,(struct sockaddr_in6*)sa1));
 }
 uint16_t saport(const struct sockaddr *sa)
 {
@@ -236,7 +236,7 @@ time_t file_mod_time(const char *filename)
 
 bool pf_in_range(uint16_t port, const port_filter *pf)
 {
-	return port && ((!pf->from && !pf->to || port>=pf->from && port<=pf->to) ^ pf->neg);
+	return port && (((!pf->from && !pf->to) || (port>=pf->from && port<=pf->to)) ^ pf->neg);
 }
 bool pf_parse(const char *s, port_filter *pf)
 {
diff --git a/tpws/protocol.c b/tpws/protocol.c
index 0787064..22e89c5 100644
--- a/tpws/protocol.c
+++ b/tpws/protocol.c
@@ -104,7 +104,7 @@ bool HttpReplyLooksLikeDPIRedirect(const uint8_t *data, size_t len, const char *
 	
 	code = HttpReplyCode(data,len);
 	
-	if (code!=302 && code!=307 || !HttpExtractHeader(data,len,"\nLocation:",loc,sizeof(loc))) return false;
+	if ((code!=302 && code!=307) || !HttpExtractHeader(data,len,"\nLocation:",loc,sizeof(loc))) return false;
 
 	// something like : https://censor.net/badpage.php?reason=denied&source=RKN
 		
diff --git a/tpws/socks.h b/tpws/socks.h
index 9026a64..5c9feb0 100644
--- a/tpws/socks.h
+++ b/tpws/socks.h
@@ -66,8 +66,8 @@ typedef struct
 	};
 } s5_req;
 #define S5_REQ_HEADER_VALID(r,l) (l>=4 && r->ver==5)
-#define S5_IP46_VALID(r,l) (r->atyp==S5_ATYP_IP4 && l>=(4+sizeof(r->d4)) || r->atyp==S5_ATYP_IP6 && l>=(4+sizeof(r->d6)))
-#define S5_REQ_CONNECT_VALID(r,l) (S5_REQ_HEADER_VALID(r,l) && r->cmd==S5_CMD_CONNECT && (S5_IP46_VALID(r,l) || r->atyp==S5_ATYP_DOM && l>=5 && l>=(5+r->dd.len)))
+#define S5_IP46_VALID(r,l) ((r->atyp==S5_ATYP_IP4 && l>=(4+sizeof(r->d4))) || (r->atyp==S5_ATYP_IP6 && l>=(4+sizeof(r->d6))))
+#define S5_REQ_CONNECT_VALID(r,l) (S5_REQ_HEADER_VALID(r,l) && r->cmd==S5_CMD_CONNECT && (S5_IP46_VALID(r,l) || (r->atyp==S5_ATYP_DOM && l>=5 && l>=(5+r->dd.len))))
 #define S5_PORT_FROM_DD(r,l) (l>=(4+r->dd.len+2) ? ntohs(*(uint16_t*)(r->dd.domport+r->dd.len)) : 0)
 
 #define S5_REP_OK			0
diff --git a/tpws/tpws.c b/tpws/tpws.c
index 3399a28..1de0e22 100644
--- a/tpws/tpws.c
+++ b/tpws/tpws.c
@@ -875,13 +875,13 @@ static bool find_listen_addr(struct sockaddr_storage *salisten, const char *bind
 				// ipv6 links locals are fe80::/10
 				else if (a->ifa_addr->sa_family==AF_INET6
 				          &&
-				         (!*bindiface && (bindll==prefer || bindll==force) ||
-				          *bindiface && bind_if6 && !strcmp(a->ifa_name, bindiface))
+				         ((!*bindiface && (bindll==prefer || bindll==force)) ||
+				          (*bindiface && bind_if6 && !strcmp(a->ifa_name, bindiface)))
 				          &&
-					 (bindll==force && is_linklocal((struct sockaddr_in6*)a->ifa_addr) ||
-					  bindll==prefer && (pass==0 && is_linklocal((struct sockaddr_in6*)a->ifa_addr) || pass==1 && is_private6((struct sockaddr_in6*)a->ifa_addr) || pass==2) ||
-					  bindll==no &&	(pass==0 && is_private6((struct sockaddr_in6*)a->ifa_addr) || pass==1 && !is_linklocal((struct sockaddr_in6*)a->ifa_addr)) ||
-					  bindll==unwanted && (pass==0 && is_private6((struct sockaddr_in6*)a->ifa_addr) || pass==1 && !is_linklocal((struct sockaddr_in6*)a->ifa_addr) || pass==2))
+					 ((bindll==force && is_linklocal((struct sockaddr_in6*)a->ifa_addr)) ||
+					  (bindll==prefer && ((pass==0 && is_linklocal((struct sockaddr_in6*)a->ifa_addr)) || (pass==1 && is_private6((struct sockaddr_in6*)a->ifa_addr)) || pass==2)) ||
+					  (bindll==no && ((pass==0 && is_private6((struct sockaddr_in6*)a->ifa_addr)) || (pass==1 && !is_linklocal((struct sockaddr_in6*)a->ifa_addr)))) ||
+					  (bindll==unwanted && ((pass==0 && is_private6((struct sockaddr_in6*)a->ifa_addr)) || (pass==1 && !is_linklocal((struct sockaddr_in6*)a->ifa_addr)) || pass==2)))
 					)
 				{
 					salisten->ss_family = AF_INET6;
diff --git a/tpws/tpws_conn.c b/tpws/tpws_conn.c
index b88b429..23df5df 100644
--- a/tpws/tpws_conn.c
+++ b/tpws/tpws_conn.c
@@ -625,7 +625,7 @@ static bool check_connection_attempt(tproxy_conn_t *conn, int efd)
 	if (!errn)
 	{
 		VPRINT("Socket fd=%d (remote) connected", conn->fd)
-		if (!epoll_set_flow(conn, true, false) || conn_partner_alive(conn) && !epoll_set_flow(conn->partner, true, false))
+		if (!epoll_set_flow(conn, true, false) || (conn_partner_alive(conn) && !epoll_set_flow(conn->partner, true, false)))
 		{
 			return false;
 		}
@@ -1064,7 +1064,7 @@ static bool handle_epoll(tproxy_conn_t *conn, struct tailhead *conn_list, uint32
 	{
 		DBGPRINT("%s leg fd=%d stream pos : %" PRIu64 "(n%" PRIu64 ")/%" PRIu64, conn->remote ? "remote" : "local", conn->fd, conn->trd,conn->tnrd+1,conn->twr)
 #ifdef SPLICE_PRESENT
-		if (!params.nosplice && (!params.tamper || conn->remote && conn->partner->track.bTamperInCutoff || !conn->remote && !in_tamper_out_range(conn)))
+		if (!params.nosplice && (!params.tamper || (conn->remote && conn->partner->track.bTamperInCutoff) || (!conn->remote && !in_tamper_out_range(conn))))
 		{
 			// incoming data from remote leg we splice without touching
 			// pipe is in the local leg, so its in conn->partner->splice_pipe