diff --git a/src/authradius.c b/src/authradius.c
index 58872b9..7163c2a 100644
--- a/src/authradius.c
+++ b/src/authradius.c
@@ -324,7 +324,7 @@ int radsend(struct clientparam * param, int auth, int stop){
 	char buf[64];
 
 
-	if(!radiussecret || !nradservers) {
+	if(!nradservers) {
 		return 4;
 	}
 
@@ -391,7 +391,7 @@ int radsend(struct clientparam * param, int auth, int stop){
 	/* NAS-Identifier */
 	if(conf.stringtable){
 		*ptr++ = PW_NAS_IDENTIFIER;
-		len = strlen(conf.stringtable[SERVICES+param->service]);
+		len = strlen((char *)conf.stringtable[SERVICES+param->service]);
 		*ptr++ = (2 + len);
 		memcpy(ptr, conf.stringtable[SERVICES+param->service], len);
 		ptr += len;
@@ -416,7 +416,7 @@ int radsend(struct clientparam * param, int auth, int stop){
 	/* Called-Station-ID */
 	if(param->hostname){
 		*ptr++ = PW_CALLED_STATION_ID;
-		len = strlen(param->hostname);
+		len = strlen((char *)param->hostname);
 		*ptr++ = (2 + len);
 		memcpy(ptr, param->hostname, len);
 		ptr += len;
@@ -456,7 +456,7 @@ int radsend(struct clientparam * param, int auth, int stop){
 
 	/* Username */
 	if(param->username){
-	    len = strlen(param->username);
+	    len = strlen((char *)param->username);
 	    if(len>128)len=128;
 	    *ptr++ = PW_USER_NAME;
 	    *ptr++ = len + 2;
@@ -499,12 +499,12 @@ int radsend(struct clientparam * param, int auth, int stop){
 	}
 	
 	if(auth && param->password){
-    	    len = strlen(param->password);
+    	    len = strlen((char *)param->password);
 	    if(len > 128) len = 128;
 	    *ptr++ = PW_PASSWORD;
 	    ptr++;
 	    memcpy(ptr, param->password, len);
-	    rad_pwencode(ptr,
+	    rad_pwencode((char *)ptr,
 		     &len,
 		     radiussecret, 
 		     (char *)packet.vector);
@@ -582,7 +582,7 @@ int radsend(struct clientparam * param, int auth, int stop){
 			continue;
 		}
 
-		if (calc_replydigest((char *)&rpacket, packet.vector, radiussecret,
+		if (calc_replydigest((char *)&rpacket, (char *)packet.vector, radiussecret,
 			data_len) ){
 			continue;
 		}
diff --git a/src/auto.c b/src/auto.c
index 9ace9b5..54d4d0a 100644
--- a/src/auto.c
+++ b/src/auto.c
@@ -20,7 +20,7 @@ void * autochild(struct clientparam* param) {
     len = sockfillbuffcli(param, 1, CONNECTION_S);
     if (len != 1){
 	param->res = 801;
-	dolog(param, "");
+	dolog(param, (unsigned char *)"");
     }
     if(*param->clibuf == 4 || *param->clibuf == 5) return sockschild(param);
     return proxychild(param);
diff --git a/src/conf.c b/src/conf.c
index 8409772..724d408 100644
--- a/src/conf.c
+++ b/src/conf.c
@@ -324,7 +324,7 @@ static int h_log(int argc, unsigned char ** argv){
 		}
 #endif
 #ifndef NORADIUS
-		else if(!strcmp(argv[1],"radius")){
+		else if(!strcmp((char *)argv[1],"radius")){
 			conf.logfunc = logradius;
 		}
 #endif
@@ -764,7 +764,7 @@ static int h_parent(int argc, unsigned char **argv){
 		fprintf(stderr, "Chaining error: bad chain type (%s)\n", argv[2]);
 		return(4);
 	}
-	cidr = strchr(argv[3], '/');
+	cidr = strchr((char *)argv[3], '/');
 	if(cidr) *cidr = 0;
 	if(!getip46(46, argv[3], (struct sockaddr *)&chains->addr)) return (5);
 	chains->exthost = (unsigned char *)mystrdup((char *)argv[3]);
@@ -827,7 +827,7 @@ int scanipl(unsigned char *arg, struct iplist *dst){
 	memcpy(&dst->ip_from, SAADDR(&sa), SAADDRLEN(&sa));
 	dst->family = *SAFAMILY(&sa);
 	if(dash){
-		if(afdetect(dash+1) == -1) return 1;
+		if(afdetect((unsigned char *)dash+1) == -1) return 1;
 		if(!getip46(46, (unsigned char *)dash+1, (struct sockaddr *)&sa)) return 2;
 		memcpy(&dst->ip_to, SAADDR(&sa), SAADDRLEN(&sa));
 		if(*SAFAMILY(&sa) != dst->family || memcmp(&dst->ip_to, &dst->ip_from, SAADDRLEN(&sa)) < 0) return 3;
@@ -1374,16 +1374,16 @@ static int h_radius(int argc, unsigned char **argv){
 	}
 */
 	memset(radiuslist, 0, sizeof(radiuslist));
-	if(strlen(argv[1]) > 63) argv[1][63] = 0;
-	strcpy(radiussecret, argv[1]);
+	if(strlen((char *)argv[1]) > 63) argv[1][63] = 0;
+	strcpy(radiussecret, (char *)argv[1]);
 	for( nradservers=0; nradservers < MAXRADIUS && nradservers < argc -2; nradservers++){
 		char *s = 0;
-		if((s=strchr(argv[nradservers + 2], '/'))){
+		if((s=strchr((char *)argv[nradservers + 2], '/'))){
 			*s = 0;
 			s++;
 		}
 		if( !getip46(46, argv[nradservers + 2], (struct sockaddr *)&radiuslist[nradservers].authaddr)) return 1;
-		if( s && !getip46(46, s+1, (struct sockaddr *)&radiuslist[nradservers].localaddr)) return 2;
+		if( s && !getip46(46, (unsigned char *)s+1, (struct sockaddr *)&radiuslist[nradservers].localaddr)) return 2;
 		if(!*SAPORT(&radiuslist[nradservers].authaddr))*SAPORT(&radiuslist[nradservers].authaddr) = htons(1812);
 		port = ntohs(*SAPORT(&radiuslist[nradservers].authaddr));
 		radiuslist[nradservers].logaddr = radiuslist[nradservers].authaddr;
diff --git a/src/plugins/FilePlugin/FilePlugin.c b/src/plugins/FilePlugin/FilePlugin.c
index 0b8255e..e597f77 100644
--- a/src/plugins/FilePlugin/FilePlugin.c
+++ b/src/plugins/FilePlugin/FilePlugin.c
@@ -37,8 +37,10 @@ extern "C" {
 #ifndef _WIN32
 #define WINAPI
 #define fp_size_t size_t
+#define fp_ssize_t ssize_t
 #else
 #define fp_size_t int
+#define fp_ssize_t int
 #endif
 
 static struct pluginlink * pl;
@@ -457,7 +459,7 @@ static int WINAPI fp_poll(struct pollfd *fds, unsigned int nfds, int timeout){
  return sso._poll(fds, nfds, timeout);
 }
 
-static int WINAPI fp_send(SOCKET s, const char *msg, fp_size_t len, int flags){
+static fp_ssize_t WINAPI fp_send(SOCKET s, const char *msg, fp_size_t len, int flags){
  struct fp_stream *fps = NULL;
  int res;
  res = searchsocket(s, &fps);
@@ -541,7 +543,7 @@ static int WINAPI fp_send(SOCKET s, const char *msg, fp_size_t len, int flags){
  }
  return sso._send(s, msg, len, flags);
 }
-static int WINAPI fp_sendto(SOCKET s, const void *msg, int len, int flags, const struct sockaddr *to, fp_size_t tolen){
+static fp_ssize_t WINAPI fp_sendto(SOCKET s, const void *msg, int len, int flags, const struct sockaddr *to, fp_size_t tolen){
  struct fp_stream *fps = NULL;
  int res;
  res = searchsocket(s, &fps);
@@ -659,10 +661,10 @@ static int WINAPI fp_sendto(SOCKET s, const void *msg, int len, int flags, const
  }
  return sso._sendto(s, msg, len, flags, to, tolen);
 }
-static int WINAPI fp_recv(SOCKET s, void *buf, fp_size_t len, int flags){
+static fp_ssize_t WINAPI fp_recv(SOCKET s, void *buf, fp_size_t len, int flags){
  return sso._recv(s, buf, len, flags);
 }
-static int WINAPI fp_recvfrom(SOCKET s, void * buf, fp_size_t len, int flags, struct sockaddr * from, fp_size_t * fromlen){
+static fp_ssize_t WINAPI fp_recvfrom(SOCKET s, void * buf, fp_size_t len, int flags, struct sockaddr * from, fp_size_t * fromlen){
  return sso._recvfrom(s, buf, len, flags, from, fromlen);
 }
 static int WINAPI fp_shutdown(SOCKET s, int how){
diff --git a/src/plugins/SSLPlugin/ssl_plugin.c b/src/plugins/SSLPlugin/ssl_plugin.c
index 56ae11f..8bfbab4 100644
--- a/src/plugins/SSLPlugin/ssl_plugin.c
+++ b/src/plugins/SSLPlugin/ssl_plugin.c
@@ -110,7 +110,7 @@ struct sockfuncs sso;
 #ifdef _WIN32
 static int WINAPI ssl_send(SOCKET s, const void *msg, int len, int flags){
 #else
-static int ssl_send(SOCKET s, const void *msg, size_t len, int flags){
+static ssize_t  ssl_send(SOCKET s, const void *msg, size_t len, int flags){
 #endif
 	struct SSLqueue *sslq;
 
@@ -134,7 +134,7 @@ static int ssl_send(SOCKET s, const void *msg, size_t len, int flags){
 #ifdef _WIN32
 static int WINAPI ssl_sendto(SOCKET s, const void *msg, int len, int flags, const struct sockaddr *to, int tolen){
 #else
-static int ssl_sendto(SOCKET s, const void *msg, size_t len, int flags, const struct sockaddr *to, SASIZETYPE tolen){
+static ssize_t ssl_sendto(SOCKET s, const void *msg, size_t len, int flags, const struct sockaddr *to, SASIZETYPE tolen){
 #endif
 	struct SSLqueue *sslq;
 
@@ -157,7 +157,7 @@ static int ssl_sendto(SOCKET s, const void *msg, size_t len, int flags, const st
 #ifdef _WIN32
 static int WINAPI ssl_recvfrom(SOCKET s, void *msg, int len, int flags, struct sockaddr *from, int *fromlen){
 #else
-static int ssl_recvfrom(SOCKET s, void *msg, size_t len, int flags, struct sockaddr *from, SASIZETYPE *fromlen){
+static ssize_t  ssl_recvfrom(SOCKET s, void *msg, size_t len, int flags, struct sockaddr *from, SASIZETYPE *fromlen){
 #endif
 	struct SSLqueue *sslq;
 
@@ -179,7 +179,7 @@ static int ssl_recvfrom(SOCKET s, void *msg, size_t len, int flags, struct socka
 #ifdef _WIN32
 static int WINAPI ssl_recv(SOCKET s, void *msg, int len, int flags){
 #else
-static int WINAPI ssl_recv(SOCKET s, void *msg, size_t len, int flags){
+static ssize_t ssl_recv(SOCKET s, void *msg, size_t len, int flags){
 #endif
 	struct SSLqueue *sslq;
 
diff --git a/src/structures.h b/src/structures.h
index 82c910a..020a16e 100644
--- a/src/structures.h
+++ b/src/structures.h
@@ -720,10 +720,10 @@ struct sockfuncs {
    	int (*_getsockopt)(SOCKET s, int level, int optname, void * optval, socklen_t * optlen);
 	int (*_setsockopt)(int s, int level, int optname, const void *optval, socklen_t optlen);
 	int (*_poll)(struct pollfd *fds, unsigned int nfds, int timeout);
-	size_t (*_send)(SOCKET s, const void *msg, size_t len, int flags);
-	size_t (*_sendto)(SOCKET s, const void *msg, size_t len, int flags, const struct sockaddr *to, SASIZETYPE tolen);
-	size_t (*_recv)(SOCKET s, void *buf, size_t len, int flags);
-	size_t (*_recvfrom)(SOCKET s, void * buf, size_t len, int flags, struct sockaddr * from, SASIZETYPE * fromlen);
+	ssize_t (*_send)(SOCKET s, const void *msg, size_t len, int flags);
+	ssize_t (*_sendto)(SOCKET s, const void *msg, size_t len, int flags, const struct sockaddr *to, SASIZETYPE tolen);
+	ssize_t (*_recv)(SOCKET s, void *buf, size_t len, int flags);
+	ssize_t (*_recvfrom)(SOCKET s, void * buf, size_t len, int flags, struct sockaddr * from, SASIZETYPE * fromlen);
 	int (*_shutdown)(SOCKET s, int how);
 	int (*_closesocket)(SOCKET s);
 #endif