diff --git a/mdig/mdig.c b/mdig/mdig.c
index f91cb9b..b50d95a 100644
--- a/mdig/mdig.c
+++ b/mdig/mdig.c
@@ -354,7 +354,6 @@ int main(int argc, char **argv)
 		case 2: /* verbose */
 			glob.verbose = '\1';
 			break;
-			glob.threads = optarg ? atoi(optarg) : 0;
 		case 3: /* stats */
 			glob.stats_every = optarg ? atoi(optarg) : 0;
 			break;
diff --git a/nfq/checksum.c b/nfq/checksum.c
index e29b521..09be36b 100644
--- a/nfq/checksum.c
+++ b/nfq/checksum.c
@@ -18,7 +18,7 @@ static uint16_t do_csum(const uint8_t * buff, size_t len)
 	uint64_t result,w,carry=0;
 	uint16_t u16;
 
-	if (len <= 0) return 0;
+	if (!len) return 0;
 	odd = (uint8_t)(1 & (size_t)buff);
 	if (odd)
 	{
diff --git a/nfq/conntrack.c b/nfq/conntrack.c
index 9cf3935..a1b396d 100644
--- a/nfq/conntrack.c
+++ b/nfq/conntrack.c
@@ -276,7 +276,7 @@ void ConntrackPoolPurge(t_conntrack *p)
 	HASH_ITER(hh, p, t, tmp) { \
 		*sa1=0; inet_ntop(AF_INET##f, &t->conn.e1.adr, sa1, sizeof(sa1)); \
 		*sa2=0; inet_ntop(AF_INET##f, &t->conn.e2.adr, sa2, sizeof(sa2)); \
-		printf("[%s]:%u => [%s]:%u : %s : t0=%lld last=t0+%lld now=last+%lld packets_orig=%llu packets_reply=%llu seq0=%u rseq=%u ack0=%u rack=%u wsize_orig=%u:%d wsize_reply=%u:%d  cutoff=%u wss_cutoff=%u d_cutoff=%u\n", \
+		printf("[%s]:%u => [%s]:%u : %s : t0=%llu last=t0+%llu now=last+%llu packets_orig=%llu packets_reply=%llu seq0=%u rseq=%u ack0=%u rack=%u wsize_orig=%u:%d wsize_reply=%u:%d  cutoff=%u wss_cutoff=%u d_cutoff=%u\n", \
 			sa1, t->conn.e1.port, sa2, t->conn.e2.port, \
 			connstate_s[t->track.state], \
 			(unsigned long long)t->track.t_start, (unsigned long long)(t->track.t_last - t->track.t_start), (unsigned long long)(tnow - t->track.t_last), \
diff --git a/nfq/darkmagic.c b/nfq/darkmagic.c
index d193297..05df8ff 100644
--- a/nfq/darkmagic.c
+++ b/nfq/darkmagic.c
@@ -103,7 +103,7 @@ static void fill_tcphdr(struct tcphdr *tcp, uint8_t fooling, uint8_t tcp_flags,
 	while (t&3) tcpopt[t++]=1; // noop
 	tcp->th_off += t>>2;
 }
-static uint16_t tcpopt_len(uint8_t fooling, uint32_t *timestamps, uint8_t scale_factor)
+static uint16_t tcpopt_len(uint8_t fooling, const uint32_t *timestamps, uint8_t scale_factor)
 {
 	uint16_t t=0;
 	if (fooling & TCP_FOOL_MD5SIG) t=18;
@@ -586,7 +586,7 @@ void print_tcphdr(const struct tcphdr *tcphdr)
 
 
 
-bool proto_check_ipv4(uint8_t *data, size_t len)
+bool proto_check_ipv4(const uint8_t *data, size_t len)
 {
 	return 	len >= 20 && (data[0] & 0xF0) == 0x40 &&
 		len >= ((data[0] & 0x0F) << 2);
@@ -600,7 +600,7 @@ void proto_skip_ipv4(uint8_t **data, size_t *len)
 	*data += l;
 	*len -= l;
 }
-bool proto_check_tcp(uint8_t *data, size_t len)
+bool proto_check_tcp(const uint8_t *data, size_t len)
 {
 	return	len >= 20 && len >= ((data[12] & 0xF0) >> 2);
 }
@@ -612,7 +612,7 @@ void proto_skip_tcp(uint8_t **data, size_t *len)
 	*len -= l;
 }
 
-bool proto_check_ipv6(uint8_t *data, size_t len)
+bool proto_check_ipv6(const uint8_t *data, size_t len)
 {
 	return 	len >= 40 && (data[0] & 0xF0) == 0x60 &&
 		(len - 40) >= htons(*(uint16_t*)(data + 4)); // payload length
@@ -702,7 +702,6 @@ void tcp_rewrite_wscale(struct tcphdr *tcp, uint8_t scale_factor)
 void tcp_rewrite_winsize(struct tcphdr *tcp, uint16_t winsize, uint8_t scale_factor)
 {
 	uint16_t winsize_old;
-	uint8_t *scale,scale_factor_old;
 
 	winsize_old = htons(tcp->th_win); // << scale_factor;
 	tcp->th_win = htons(winsize);
diff --git a/nfq/darkmagic.h b/nfq/darkmagic.h
index a5c3999..6430e8f 100644
--- a/nfq/darkmagic.h
+++ b/nfq/darkmagic.h
@@ -73,11 +73,11 @@ void print_ip6hdr(const struct ip6_hdr *ip6hdr, uint8_t proto);
 void print_tcphdr(const struct tcphdr *tcphdr);
 
 
-bool proto_check_ipv4(uint8_t *data, size_t len);
+bool proto_check_ipv4(const uint8_t *data, size_t len);
 void proto_skip_ipv4(uint8_t **data, size_t *len);
-bool proto_check_tcp(uint8_t *data, size_t len);
+bool proto_check_tcp(const uint8_t *data, size_t len);
 void proto_skip_tcp(uint8_t **data, size_t *len);
-bool proto_check_ipv6(uint8_t *data, size_t len);
+bool proto_check_ipv6(const uint8_t *data, size_t len);
 void proto_skip_ipv6(uint8_t **data, size_t *len, uint8_t *proto_type);
 
 bool tcp_synack_segment(const struct tcphdr *tcphdr);
diff --git a/nfq/hostlist.c b/nfq/hostlist.c
index b4136d2..797e363 100644
--- a/nfq/hostlist.c
+++ b/nfq/hostlist.c
@@ -3,7 +3,7 @@
 #include "gzip.h"
 
 
-static bool addpool(strpool **hostlist, char **s, char *end)
+static bool addpool(strpool **hostlist, char **s, const char *end)
 {
 	char *p;
 	
diff --git a/nfq/nfqws.c b/nfq/nfqws.c
index 2a37ee3..276513f 100644
--- a/nfq/nfqws.c
+++ b/nfq/nfqws.c
@@ -166,7 +166,7 @@ static int nfq_cb(struct nfq_q_handle *qh, struct nfgenmsg *nfmsg,
 	struct nfq_data *nfa, void *cookie)
 {
 	int id;
-	size_t len;
+	int len;
 	struct nfqnl_msg_packet_hdr *ph;
 	uint8_t *data;
 
diff --git a/tpws/hostlist.c b/tpws/hostlist.c
index 87116e2..9768379 100644
--- a/tpws/hostlist.c
+++ b/tpws/hostlist.c
@@ -3,7 +3,7 @@
 #include "gzip.h"
 #include "params.h"
 
-static bool addpool(strpool **hostlist, char **s, char *end)
+static bool addpool(strpool **hostlist, char **s, const char *end)
 {
 	char *p;
 	
diff --git a/tpws/tamper.c b/tpws/tamper.c
index f9f2748..45f7ef1 100644
--- a/tpws/tamper.c
+++ b/tpws/tamper.c
@@ -16,7 +16,7 @@ bool find_host(char **pHost,char *buf,size_t bs)
 		if (*pHost)
 		{
 			(*pHost)++;
-			VPRINT("Found Host: at pos %zu",*pHost - buf)
+			VPRINT("Found Host: at pos %td",*pHost - buf)
 		}
 	}
 	return !!*pHost;
@@ -73,7 +73,7 @@ void modify_tcp_segment(char *segment,size_t segment_buffer_size,size_t *size,si
 					if (pp == (p - 1))
 					{
 						// probably end of http headers
-						VPRINT("Found double EOL at pos %zu. Stop replacing.", pp - segment)
+						VPRINT("Found double EOL at pos %td. Stop replacing.", pp - segment)
 						break;
 					}
 					pp = p;
@@ -141,7 +141,7 @@ void modify_tcp_segment(char *segment,size_t segment_buffer_size,size_t *size,si
 			}
 			if (params.hostcase && find_host(&pHost,segment,*size))
 			{
-				VPRINT("Changing 'Host:' => '%c%c%c%c:' at pos %zu", params.hostspell[0], params.hostspell[1], params.hostspell[2], params.hostspell[3], pHost - segment)
+				VPRINT("Changing 'Host:' => '%c%c%c%c:' at pos %td", params.hostspell[0], params.hostspell[1], params.hostspell[2], params.hostspell[3], pHost - segment)
 				memcpy(pHost, params.hostspell, 4);
 			}
 			if (params.hostpad && find_host(&pHost,segment,*size))
diff --git a/tpws/tpws.c b/tpws/tpws.c
index fe4298a..afef457 100644
--- a/tpws/tpws.c
+++ b/tpws/tpws.c
@@ -629,7 +629,7 @@ static bool set_ulimit()
 	DBGPRINT("set_ulimit : current system file-max=%ju",(uintmax_t)cur_lim)
 	if (cur_lim<fdmin_system)
 	{
-		DBGPRINT("set_ulimit : system fd limit is too low. trying to increase to %jd",(uintmax_t)fdmin_system)
+		DBGPRINT("set_ulimit : system fd limit is too low. trying to increase to %ju",(uintmax_t)fdmin_system)
 		if (!write_system_maxfiles(fdmin_system))
 		{
 			fprintf(stderr,"could not set system-wide max file descriptors\n");
diff --git a/tpws/tpws_conn.c b/tpws/tpws_conn.c
index 89dd7b8..a1a67b2 100644
--- a/tpws/tpws_conn.c
+++ b/tpws/tpws_conn.c
@@ -178,7 +178,7 @@ static ssize_t send_buffer_send(send_buffer_t *sb, int fd)
 }
 static ssize_t send_buffers_send(send_buffer_t *sb_array, int count, int fd, size_t *real_wr)
 {
-	ssize_t wr=0,twr=0;
+	ssize_t wr,twr=0;
 
 	for (int i=0;i<count;i++)
 	{
@@ -596,7 +596,7 @@ static bool epoll_set_flow_pair(tproxy_conn_t *conn)
 
 static bool handle_unsent(tproxy_conn_t *conn)
 {
-	ssize_t wr=0,twr=0;
+	ssize_t wr;
 
 	DBGPRINT("+handle_unsent, fd=%d has_unsent=%d has_unsent_partner=%d",conn->fd,conn_has_unsent(conn),conn_partner_alive(conn) ? conn_has_unsent(conn->partner) : false)
 	
@@ -610,7 +610,6 @@ static bool handle_unsent(tproxy_conn_t *conn)
 			if (errno==EAGAIN) wr=0;
 			else return false;
 		}
-		twr += wr;
 		conn->twr += wr;
 		conn->wr_unsent -= wr;
 	}
@@ -620,7 +619,6 @@ static bool handle_unsent(tproxy_conn_t *conn)
 		wr=conn_buffers_send(conn);
 		DBGPRINT("conn_buffers_send wr=%zd",wr)
 		if (wr<0) return false;
-		twr += wr;
 	}
 	return epoll_set_flow_pair(conn);
 }
@@ -1006,7 +1004,7 @@ static bool remove_closed_connections(int efd, struct tailhead *close_list)
 
 		shutdown(conn->fd,SHUT_RDWR);
 		epoll_del(conn);
-		VPRINT("Socket fd=%d (partner_fd=%d, remote=%d) closed, connection removed. total_read=%zu total_write=%zu event_count=%d",
+		VPRINT("Socket fd=%d (partner_fd=%d, remote=%d) closed, connection removed. total_read=%zu total_write=%zu event_count=%u",
 			conn->fd, conn->partner ? conn->partner->fd : 0, conn->remote, conn->trd, conn->twr, conn->event_count)
 		if (conn->remote) legs_remote--; else legs_local--;
 		free_conn(conn);
@@ -1102,7 +1100,7 @@ static void conn_close_with_partner_check(struct tailhead *conn_list, struct tai
 	}
 }
 
-int event_loop(int *listen_fd, size_t listen_fd_ct)
+int event_loop(const int *listen_fd, size_t listen_fd_ct)
 {
 	int retval = 0, num_events = 0;
 	int tmp_fd = 0; //Used to temporarily hold the accepted file descriptor
diff --git a/tpws/tpws_conn.h b/tpws/tpws_conn.h
index 193695c..5b574d2 100644
--- a/tpws/tpws_conn.h
+++ b/tpws/tpws_conn.h
@@ -11,7 +11,7 @@
 #define DEFAULT_MAX_CONN	512
 #define DEFAULT_MAX_ORPHAN_TIME	5
 
-int event_loop(int *listen_fd, size_t listen_fd_ct);
+int event_loop(const int *listen_fd, size_t listen_fd_ct);
 
 //Three different states of a connection
 enum{