diff --git a/bandb/bandb.c b/bandb/bandb.c
index 2d272a1f..3b3ab8cc 100644
--- a/bandb/bandb.c
+++ b/bandb/bandb.c
@@ -255,7 +255,7 @@ dummy_handler(int sig)
 #endif
 
 static void
-setup_signals()
+setup_signals(void)
 {
 #ifndef WINDOWS
 	struct sigaction act;
@@ -298,7 +298,7 @@ int
 main(int argc, char *argv[])
 {
 	setup_signals();
-	bandb_helper = rb_helper_child(parse_request, error_cb, NULL, NULL, NULL, 256, 256, 256, 256);	/* XXX fix me */
+	bandb_helper = rb_helper_child(parse_request, error_cb, NULL, NULL, NULL, 256, 256, 256);	/* XXX fix me */
 	if(bandb_helper == NULL)
 	{
 		fprintf(stderr,
diff --git a/bandb/bantool.c b/bandb/bantool.c
index e43c0f8f..3bebb596 100644
--- a/bandb/bantool.c
+++ b/bandb/bantool.c
@@ -255,10 +255,10 @@ main(int argc, char *argv[])
 	if(flag.import)
 	{
 		if(count.error && flag.verbose)
-			fprintf(stderr, "* I was unable to locate %i config files to import.\n",
+			fprintf(stderr, "* I was unable to locate %u config files to import.\n",
 				count.error);
 
-		fprintf(stdout, "* Import Stats: Klines: %i, Dlines: %i, Xlines: %i, Resvs: %i \n",
+		fprintf(stdout, "* Import Stats: Klines: %u, Dlines: %u, Xlines: %u, Resvs: %u \n",
 			count.klines, count.dlines, count.xlines, count.resvs);
 
 		fprintf(stdout,
diff --git a/bandb/rsdb_sqlite3.c b/bandb/rsdb_sqlite3.c
index 77903200..77898e82 100644
--- a/bandb/rsdb_sqlite3.c
+++ b/bandb/rsdb_sqlite3.c
@@ -120,7 +120,7 @@ static int
 rsdb_callback_func(void *cbfunc, int argc, char **argv, char **colnames)
 {
 	rsdb_callback cb = (rsdb_callback)((uintptr_t)cbfunc);
-	(cb) (argc, (const char **)argv);
+	(cb) (argc, (const char **)(void *)argv);
 	return 0;
 }
 
diff --git a/extensions/ip_cloaking.c b/extensions/ip_cloaking.c
index 3d13fb18..8aa872c6 100644
--- a/extensions/ip_cloaking.c
+++ b/extensions/ip_cloaking.c
@@ -141,7 +141,7 @@ do_host_cloak_host(const char *inbuf, char *outbuf)
 		if (*tptr == '.')
 			break;
 
-		if (isdigit(*tptr) || *tptr == '-')
+		if (isdigit((unsigned char)*tptr) || *tptr == '-')
 			continue;
 
 		*tptr = b26_alphabet[(*tptr + accum) % 26];
@@ -153,7 +153,7 @@ do_host_cloak_host(const char *inbuf, char *outbuf)
 	/* pass 2: scramble each number in the address */
 	for (tptr = outbuf; *tptr != '\0'; tptr++)
 	{
-		if (isdigit(*tptr))
+		if (isdigit((unsigned char)*tptr))
 			*tptr = '0' + (*tptr + accum) % 10;
 
 		accum = (accum << 1) | (accum >> 31);
diff --git a/extensions/ip_cloaking_3.0.c b/extensions/ip_cloaking_3.0.c
index 57c2ce30..627bd366 100644
--- a/extensions/ip_cloaking_3.0.c
+++ b/extensions/ip_cloaking_3.0.c
@@ -151,7 +151,7 @@ do_host_cloak_host(const char *inbuf, char *outbuf)
 		if (*tptr == '.')
 			break;
 
-		if (isdigit(*tptr) || *tptr == '-')
+		if (isdigit((unsigned char)*tptr) || *tptr == '-')
 			continue;
 
 		*tptr = b26_alphabet[(*tptr * accum) % 26];
@@ -160,7 +160,7 @@ do_host_cloak_host(const char *inbuf, char *outbuf)
 	/* pass 2: scramble each number in the address */
 	for (tptr = outbuf; *tptr != '\0'; tptr++)
 	{
-		if (isdigit(*tptr))
+		if (isdigit((unsigned char)*tptr))
 		{
 			*tptr = 48 + ((*tptr * accum) % 10);
 		}
diff --git a/extensions/ip_cloaking_4.0.c b/extensions/ip_cloaking_4.0.c
index 82fdad95..df9a4117 100644
--- a/extensions/ip_cloaking_4.0.c
+++ b/extensions/ip_cloaking_4.0.c
@@ -141,7 +141,7 @@ do_host_cloak_host(const char *inbuf, char *outbuf)
 		if (*tptr == '.')
 			break;
 
-		if (isdigit(*tptr) || *tptr == '-')
+		if (isdigit((unsigned char)*tptr) || *tptr == '-')
 			continue;
 
 		*tptr = b26_alphabet[(*tptr + accum) % 26];
@@ -153,7 +153,7 @@ do_host_cloak_host(const char *inbuf, char *outbuf)
 	/* pass 2: scramble each number in the address */
 	for (tptr = outbuf; *tptr != '\0'; tptr++)
 	{
-		if (isdigit(*tptr))
+		if (isdigit((unsigned char)*tptr))
 			*tptr = '0' + (*tptr + accum) % 10;
 
 		accum = (accum << 1) | (accum >> 31);
diff --git a/extensions/ip_cloaking_old.c b/extensions/ip_cloaking_old.c
index f33ee46b..80b6807d 100644
--- a/extensions/ip_cloaking_old.c
+++ b/extensions/ip_cloaking_old.c
@@ -71,7 +71,7 @@ distribute_hostchange(struct Client *client_p, char *newhost)
 static void
 do_host_cloak(const char *inbuf, char *outbuf, int ipmask)
 {
-	int cyc;
+	unsigned int cyc;
 	unsigned int hosthash = 1, hosthash2 = 1;
 	unsigned int maxcycle = strlen(inbuf);
 	int len1;
diff --git a/include/hostmask.h b/include/hostmask.h
index 2a7878b9..4a265aa6 100644
--- a/include/hostmask.h
+++ b/include/hostmask.h
@@ -36,7 +36,7 @@ enum
 #endif
 };
 
-int parse_netmask(const char *, struct sockaddr *, int *);
+int parse_netmask(const char *, struct rb_sockaddr_storage *, int *);
 struct ConfItem *find_conf_by_address(const char *host, const char *sockhost,
 				      const char *orighost, struct sockaddr *,
 				      int, int, const char *, const char *);
diff --git a/include/s_conf.h b/include/s_conf.h
index 3f4d69f5..42d34633 100644
--- a/include/s_conf.h
+++ b/include/s_conf.h
@@ -350,7 +350,7 @@ extern int detach_conf(struct Client *);
 extern struct ConfItem *find_tkline(const char *, const char *, struct sockaddr *);
 extern char *show_iline_prefix(struct Client *, struct ConfItem *, char *);
 extern void get_printable_conf(struct ConfItem *,
-			       char **, char **, char **, char **, int *, char **);
+			       char **, char **, const char **, char **, int *, char **);
 extern char *get_user_ban_reason(struct ConfItem *aconf);
 extern void get_printable_kline(struct Client *, struct ConfItem *,
 				char **, char **, char **, char **);
diff --git a/include/s_user.h b/include/s_user.h
index 137119b8..0c39ec5e 100644
--- a/include/s_user.h
+++ b/include/s_user.h
@@ -38,7 +38,7 @@ extern int valid_hostname(const char *hostname);
 extern int valid_username(const char *username);
 
 extern int user_mode(struct Client *, struct Client *, int, const char **);
-extern void send_umode(struct Client *, struct Client *, int, int, char *);
+extern void send_umode(struct Client *, struct Client *, int, char *);
 extern void send_umode_out(struct Client *, struct Client *, int);
 extern int show_lusers(struct Client *source_p);
 extern int register_local_user(struct Client *, struct Client *, const char *);
diff --git a/libratbox/include/ratbox_lib.h b/libratbox/include/ratbox_lib.h
index 85c84030..ac91f476 100644
--- a/libratbox/include/ratbox_lib.h
+++ b/libratbox/include/ratbox_lib.h
@@ -124,7 +124,7 @@ char *rb_strerror(int error);
 #else
 #define slrb_assert(expr)	do								\
 			if(rb_unlikely(!(expr))) {							\
-				rb_lib_log(L_MAIN, 						\
+				rb_lib_log( 						\
 				"file: %s line: %d: Assertion failed: (%s)",		\
 				__FILE__, __LINE__, #expr); 				\
 			}								\
diff --git a/libratbox/include/rb_helper.h b/libratbox/include/rb_helper.h
index 246438c0..3287e8d9 100644
--- a/libratbox/include/rb_helper.h
+++ b/libratbox/include/rb_helper.h
@@ -41,7 +41,7 @@ rb_helper *rb_helper_start(const char *name, const char *fullpath, rb_helper_cb
 
 rb_helper *rb_helper_child(rb_helper_cb * read_cb, rb_helper_cb * error_cb,
 			   log_cb * ilog, restart_cb * irestart, die_cb * idie,
-			   int maxcon, size_t lb_heap_size, size_t dh_size, size_t fd_heap_size);
+			   size_t lb_heap_size, size_t dh_size, size_t fd_heap_size);
 
 void rb_helper_restart(rb_helper *helper);
 #ifdef __GNUC__
diff --git a/libratbox/src/commio.c b/libratbox/src/commio.c
index 3ba0974a..1c8b2616 100644
--- a/libratbox/src/commio.c
+++ b/libratbox/src/commio.c
@@ -1514,7 +1514,7 @@ inet_pton6(const char *src, unsigned char *dst)
 	curtok = src;
 	saw_xdigit = 0;
 	val = 0;
-	while((ch = tolower(*src++)) != '\0')
+	while((ch = tolower((unsigned char)*src++)) != '\0')
 	{
 		const char *pch;
 
diff --git a/libratbox/src/helper.c b/libratbox/src/helper.c
index 91e83d99..5e9c98c4 100644
--- a/libratbox/src/helper.c
+++ b/libratbox/src/helper.c
@@ -42,7 +42,7 @@ struct _rb_helper
 /* setup all the stuff a new child needs */
 rb_helper *
 rb_helper_child(rb_helper_cb * read_cb, rb_helper_cb * error_cb, log_cb * ilog,
-		restart_cb * irestart, die_cb * idie, int maxcon, size_t lb_heap_size,
+		restart_cb * irestart, die_cb * idie, size_t lb_heap_size,
 		size_t dh_size, size_t fd_heap_size)
 {
 	rb_helper *helper;
diff --git a/libratbox/src/patricia.c b/libratbox/src/patricia.c
index b662fc1e..cf0dd31e 100644
--- a/libratbox/src/patricia.c
+++ b/libratbox/src/patricia.c
@@ -399,7 +399,7 @@ rb_patricia_search_exact(rb_patricia_tree_t *patricia, rb_prefix_t *prefix)
 					prefix_toa(node->prefix), node->prefix->bitlen);
 			else
 				fprintf(stderr,
-					"patricia_search_exact: take right at %d\n", node->bit);
+					"patricia_search_exact: take right at %u\n", node->bit);
 #endif /* PATRICIA_DEBUG */
 			node = node->r;
 		}
@@ -412,7 +412,7 @@ rb_patricia_search_exact(rb_patricia_tree_t *patricia, rb_prefix_t *prefix)
 					prefix_toa(node->prefix), node->prefix->bitlen);
 			else
 				fprintf(stderr,
-					"patricia_search_exact: take left at %d\n", node->bit);
+					"patricia_search_exact: take left at %u\n", node->bit);
 #endif /* PATRICIA_DEBUG */
 			node = node->l;
 		}
@@ -423,10 +423,10 @@ rb_patricia_search_exact(rb_patricia_tree_t *patricia, rb_prefix_t *prefix)
 
 #ifdef PATRICIA_DEBUG
 	if(node->prefix)
-		fprintf(stderr, "patricia_search_exact: stop at %s/%d %d\n",
+		fprintf(stderr, "patricia_search_exact: stop at %s/%d %u\n",
 			prefix_toa(node->prefix), node->prefix->bitlen, node->bit);
 	else
-		fprintf(stderr, "patricia_search_exact: stop at %d\n", node->bit);
+		fprintf(stderr, "patricia_search_exact: stop at %u\n", node->bit);
 #endif /* PATRICIA_DEBUG */
 	if(node->bit > bitlen || node->prefix == NULL)
 		return (NULL);
@@ -486,7 +486,7 @@ rb_patricia_search_best2(rb_patricia_tree_t *patricia, rb_prefix_t *prefix, int
 					prefix_toa(node->prefix), node->prefix->bitlen);
 			else
 				fprintf(stderr,
-					"patricia_search_best: take right at %d\n", node->bit);
+					"patricia_search_best: take right at %u\n", node->bit);
 #endif /* PATRICIA_DEBUG */
 			node = node->r;
 		}
@@ -499,7 +499,7 @@ rb_patricia_search_best2(rb_patricia_tree_t *patricia, rb_prefix_t *prefix, int
 					prefix_toa(node->prefix), node->prefix->bitlen);
 			else
 				fprintf(stderr,
-					"patricia_search_best: take left at %d\n", node->bit);
+					"patricia_search_best: take left at %u\n", node->bit);
 #endif /* PATRICIA_DEBUG */
 			node = node->l;
 		}
@@ -518,7 +518,7 @@ rb_patricia_search_best2(rb_patricia_tree_t *patricia, rb_prefix_t *prefix, int
 		fprintf(stderr, "patricia_search_best: stop at %s/%d\n",
 			prefix_toa(node->prefix), node->prefix->bitlen);
 	else
-		fprintf(stderr, "patricia_search_best: stop at %d\n", node->bit);
+		fprintf(stderr, "patricia_search_best: stop at %u\n", node->bit);
 #endif /* PATRICIA_DEBUG */
 
 	if(cnt <= 0)
@@ -601,7 +601,7 @@ rb_patricia_lookup(rb_patricia_tree_t *patricia, rb_prefix_t *prefix)
 					"patricia_lookup: take right %s/%d\n",
 					prefix_toa(node->prefix), node->prefix->bitlen);
 			else
-				fprintf(stderr, "patricia_lookup: take right at %d\n", node->bit);
+				fprintf(stderr, "patricia_lookup: take right at %u\n", node->bit);
 #endif /* PATRICIA_DEBUG */
 			node = node->r;
 		}
@@ -615,7 +615,7 @@ rb_patricia_lookup(rb_patricia_tree_t *patricia, rb_prefix_t *prefix)
 					"patricia_lookup: take left %s/%d\n",
 					prefix_toa(node->prefix), node->prefix->bitlen);
 			else
-				fprintf(stderr, "patricia_lookup: take left at %d\n", node->bit);
+				fprintf(stderr, "patricia_lookup: take left at %u\n", node->bit);
 #endif /* PATRICIA_DEBUG */
 			node = node->l;
 		}
@@ -654,7 +654,7 @@ rb_patricia_lookup(rb_patricia_tree_t *patricia, rb_prefix_t *prefix)
 	if(differ_bit > check_bit)
 		differ_bit = check_bit;
 #ifdef PATRICIA_DEBUG
-	fprintf(stderr, "patricia_lookup: differ_bit %d\n", differ_bit);
+	fprintf(stderr, "patricia_lookup: differ_bit %u\n", differ_bit);
 #endif /* PATRICIA_DEBUG */
 
 	parent = node->parent;
@@ -667,7 +667,7 @@ rb_patricia_lookup(rb_patricia_tree_t *patricia, rb_prefix_t *prefix)
 			fprintf(stderr, "patricia_lookup: up to %s/%d\n",
 				prefix_toa(node->prefix), node->prefix->bitlen);
 		else
-			fprintf(stderr, "patricia_lookup: up to %d\n", node->bit);
+			fprintf(stderr, "patricia_lookup: up to %u\n", node->bit);
 #endif /* PATRICIA_DEBUG */
 	}
 
diff --git a/libratbox/src/ports.c b/libratbox/src/ports.c
index 5bbad0bb..505ff481 100644
--- a/libratbox/src/ports.c
+++ b/libratbox/src/ports.c
@@ -124,7 +124,7 @@ int
 rb_select_ports(long delay)
 {
 	int i, fd;
-	int nget = 1;
+	unsigned int nget = 1;
 	struct timespec poll_time;
 	struct timespec *p = NULL;
 	struct ev_entry *ev;
@@ -143,7 +143,7 @@ rb_select_ports(long delay)
 	if(i == -1)
 		return RB_OK;
 
-	for(i = 0; i < nget; i++)
+	for(i = 0; (unsigned)i < nget; i++)
 	{
 		if(pelst[i].portev_source == PORT_SOURCE_FD)
 		{
diff --git a/libratbox/src/snprintf.c b/libratbox/src/snprintf.c
index 1c616620..d2b7cfba 100644
--- a/libratbox/src/snprintf.c
+++ b/libratbox/src/snprintf.c
@@ -32,7 +32,7 @@ skip_atoi(const char **s)
 {
 	int i = 0;
 
-	while(isdigit(**s))
+	while(isdigit((unsigned char)**s))
 		i = i * 10 + *((*s)++) - '0';
 	return i;
 }
@@ -373,7 +373,7 @@ rb_vsnprintf(char *buf, size_t size, const char *fmt, va_list args)
 
 		/* get field width */
 		field_width = -1;
-		if(isdigit(*fmt))
+		if(isdigit((unsigned char)*fmt))
 			field_width = skip_atoi(&fmt);
 		else if(*fmt == '*')
 		{
@@ -392,7 +392,7 @@ rb_vsnprintf(char *buf, size_t size, const char *fmt, va_list args)
 		if(*fmt == '.')
 		{
 			++fmt;
-			if(isdigit(*fmt))
+			if(isdigit((unsigned char)*fmt))
 				precision = skip_atoi(&fmt);
 			else if(*fmt == '*')
 			{
diff --git a/modules/m_dline.c b/modules/m_dline.c
index 98d51fce..a4bc9887 100644
--- a/modules/m_dline.c
+++ b/modules/m_dline.c
@@ -223,7 +223,7 @@ apply_dline(struct Client *source_p, const char *dlhost, int tdline_time, char *
 	int t = AF_INET, ty, b;
 	const char *creason;
 
-	ty = parse_netmask(dlhost, (struct sockaddr *) &daddr, &b);
+	ty = parse_netmask(dlhost, &daddr, &b);
 	if(ty == HM_HOST)
 	{
 		sendto_one(source_p, ":%s NOTICE %s :Invalid D-Line", me.name, source_p->name);
diff --git a/modules/m_kline.c b/modules/m_kline.c
index ff034d8d..a47939d4 100644
--- a/modules/m_kline.c
+++ b/modules/m_kline.c
@@ -724,7 +724,7 @@ already_placed_kline(struct Client *source_p, const char *luser, const char *lho
 	if(aconf == NULL && ConfigFileEntry.non_redundant_klines)
 	{
 		bits = 0;
-		if((t = parse_netmask(lhost, (struct sockaddr *) &iphost, &bits)) != HM_HOST)
+		if((t = parse_netmask(lhost, &iphost, &bits)) != HM_HOST)
 		{
 #ifdef RB_IPV6
 			if(t == HM_IPV6)
diff --git a/modules/m_privs.c b/modules/m_privs.c
index f6a32891..65cbbf7d 100644
--- a/modules/m_privs.c
+++ b/modules/m_privs.c
@@ -58,7 +58,7 @@ mapi_clist_av1 privs_clist[] = {
 struct mode_table
 {
 	const char *name;
-	int mode;
+	unsigned int mode;
 };
 
 /* there is no such table like this anywhere else */
diff --git a/modules/m_stats.c b/modules/m_stats.c
index f61e4885..44c2e15c 100644
--- a/modules/m_stats.c
+++ b/modules/m_stats.c
@@ -412,7 +412,8 @@ stats_deny (struct Client *source_p)
 static void
 stats_exempt(struct Client *source_p)
 {
-	char *name, *host, *pass, *user, *classname;
+	char *name, *host, *user, *classname;
+	const char *pass;
 	struct AddressRec *arec;
 	struct ConfItem *aconf;
 	int i, port;
@@ -523,7 +524,8 @@ stats_auth (struct Client *source_p)
 	else if((ConfigFileEntry.stats_i_oper_only == 1) && !IsOper (source_p))
 	{
 		struct ConfItem *aconf;
-		char *name, *host, *pass = "*", *user, *classname;
+		char *name, *host, *user, *classname;
+		const char *pass = "*";
 		int port;
 
 		if(MyConnect (source_p))
diff --git a/modules/m_svinfo.c b/modules/m_svinfo.c
index 1adc81da..a8e2dffa 100644
--- a/modules/m_svinfo.c
+++ b/modules/m_svinfo.c
@@ -57,7 +57,7 @@ DECLARE_MODULE_AV1(svinfo, NULL, NULL, svinfo_clist, NULL, NULL, "$Revision: 494
 static int
 ms_svinfo(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 {
-	signed int deltat;
+	signed long deltat;
 	time_t theirtime;
 	char squitreason[120];
 
@@ -82,20 +82,20 @@ ms_svinfo(struct Client *client_p, struct Client *source_p, int parc, const char
 	 */
 	rb_set_time();
 	theirtime = atol(parv[4]);
-	deltat = abs(theirtime - rb_current_time());
+	deltat = labs(theirtime - rb_current_time());
 
 	if(deltat > ConfigFileEntry.ts_max_delta)
 	{
 		sendto_realops_snomask(SNO_GENERAL, L_ALL,
 				     "Link %s dropped, excessive TS delta"
-				     " (my TS=%ld, their TS=%ld, delta=%d)",
+				     " (my TS=%ld, their TS=%ld, delta=%ld)",
 				     source_p->name,
 				     (long) rb_current_time(), (long) theirtime, deltat);
 		ilog(L_SERVER,
 		     "Link %s dropped, excessive TS delta"
-		     " (my TS=%ld, their TS=%ld, delta=%d)",
+		     " (my TS=%ld, their TS=%ld, delta=%ld)",
 		     log_client_name(source_p, SHOW_IP), (long) rb_current_time(), (long) theirtime, deltat);
-		rb_snprintf(squitreason, sizeof squitreason, "Excessive TS delta (my TS=%ld, their TS=%ld, delta=%d)",
+		rb_snprintf(squitreason, sizeof squitreason, "Excessive TS delta (my TS=%ld, their TS=%ld, delta=%ld)",
 				(long) rb_current_time(), (long) theirtime, deltat);
 		disable_server_conf_autoconn(source_p->name);
 		exit_client(source_p, source_p, source_p, squitreason);
@@ -106,7 +106,7 @@ ms_svinfo(struct Client *client_p, struct Client *source_p, int parc, const char
 	{
 		sendto_realops_snomask(SNO_GENERAL, L_NETWIDE,
 				     "Link %s notable TS delta"
-				     " (my TS=%ld, their TS=%ld, delta=%d)",
+				     " (my TS=%ld, their TS=%ld, delta=%ld)",
 				     source_p->name, (long) rb_current_time(), (long) theirtime, deltat);
 	}
 
diff --git a/modules/m_testline.c b/modules/m_testline.c
index 63ee1a3f..c74edd63 100644
--- a/modules/m_testline.c
+++ b/modules/m_testline.c
@@ -120,7 +120,7 @@ mo_testline(struct Client *client_p, struct Client *source_p, int parc, const ch
 		host = mask;
 
 	/* parses as an IP, check for a dline */
-	if((type = parse_netmask(host, (struct sockaddr *)&ip, &host_mask)) != HM_HOST)
+	if((type = parse_netmask(host, &ip, &host_mask)) != HM_HOST)
 	{
 #ifdef RB_IPV6
 		if(type == HM_IPV6)
diff --git a/modules/m_version.c b/modules/m_version.c
index f19e8fb4..be97edfe 100644
--- a/modules/m_version.c
+++ b/modules/m_version.c
@@ -36,7 +36,7 @@
 #include "parse.h"
 #include "modules.h"
 
-static char *confopts(struct Client *source_p);
+static char *confopts(void);
 
 static int m_version(struct Client *, struct Client *, int, const char **);
 static int mo_version(struct Client *, struct Client *, int, const char **);
@@ -79,7 +79,7 @@ m_version(struct Client *client_p, struct Client *source_p, int parc, const char
 #ifdef CUSTOM_BRANDING
 			   PACKAGE_NAME "-" PACKAGE_VERSION,
 #endif
-			   me.name, confopts(source_p), TS_CURRENT,
+			   me.name, confopts(), TS_CURRENT,
 			   ServerInfo.sid);
 
 	show_isupport(source_p);
@@ -101,7 +101,7 @@ mo_version(struct Client *client_p, struct Client *source_p, int parc, const cha
 #ifdef CUSTOM_BRANDING
 				   PACKAGE_NAME "-" PACKAGE_VERSION,
 #endif
-				   me.name, confopts(source_p), TS_CURRENT,
+				   me.name, confopts(), TS_CURRENT,
 				   ServerInfo.sid);
 		show_isupport(source_p);
 	}
@@ -110,12 +110,12 @@ mo_version(struct Client *client_p, struct Client *source_p, int parc, const cha
 }
 
 /* confopts()
- * input  - client pointer
+ * input  - none
  * output - ircd.conf option string
  * side effects - none
  */
 static char *
-confopts(struct Client *source_p)
+confopts(void)
 {
 	static char result[15];
 	char *p;
diff --git a/src/bandbi.c b/src/bandbi.c
index 03dd9076..1e713220 100644
--- a/src/bandbi.c
+++ b/src/bandbi.c
@@ -221,7 +221,7 @@ bandb_check_kline(struct ConfItem *aconf)
 	int aftype;
 	const char *p;
 
-	aftype = parse_netmask(aconf->host, (struct sockaddr *)&daddr, NULL);
+	aftype = parse_netmask(aconf->host, &daddr, NULL);
 
 	if(aftype != HM_HOST)
 	{
@@ -260,10 +260,9 @@ static int
 bandb_check_dline(struct ConfItem *aconf)
 {
 	struct rb_sockaddr_storage daddr;
-/* 	struct ConfItem *dconf; */
 	int bits;
 
-	if(!parse_netmask(aconf->host, (struct sockaddr *)&daddr, &bits))
+	if(!parse_netmask(aconf->host, &daddr, &bits))
 		return 0;
 
 	return 1;
diff --git a/src/hostmask.c b/src/hostmask.c
index b78fd77c..864cbf93 100644
--- a/src/hostmask.c
+++ b/src/hostmask.c
@@ -48,7 +48,7 @@ static unsigned long hash_ipv4(struct sockaddr *, int);
  * Side effects: None
  */
 int
-parse_netmask(const char *text, struct sockaddr  *naddr, int *nb)
+parse_netmask(const char *text, struct rb_sockaddr_storage *naddr, int *nb)
 {
 	char *ip = LOCAL_COPY(text);
 	char *ptr;
@@ -60,9 +60,9 @@ parse_netmask(const char *text, struct sockaddr  *naddr, int *nb)
 		b = nb;
 
 	if(naddr == NULL)
-		addr = (struct rb_sockaddr_storage *)&xaddr;
+		addr = &xaddr;
 	else
-		addr = (struct rb_sockaddr_storage *)naddr;
+		addr = naddr;
 
 	if(strpbrk(ip, "*?") != NULL)
 	{
@@ -126,7 +126,7 @@ init_host_hash(void)
 static unsigned long
 hash_ipv4(struct sockaddr *saddr, int bits)
 {
-	struct sockaddr_in *addr = (struct sockaddr_in *) saddr;
+	struct sockaddr_in *addr = (struct sockaddr_in *)(void *)saddr;
 
 	if(bits != 0)
 	{
@@ -146,7 +146,7 @@ hash_ipv4(struct sockaddr *saddr, int bits)
 static unsigned long
 hash_ipv6(struct sockaddr *saddr, int bits)
 {
-	struct sockaddr_in6 *addr = (struct sockaddr_in6 *) saddr;
+	struct sockaddr_in6 *addr = (struct sockaddr_in6 *)(void *)saddr;
 	unsigned long v = 0, n;
 	for (n = 0; n < 16; n++)
 	{
@@ -484,7 +484,7 @@ find_exact_conf_by_address(const char *address, int type, const char *username)
 
 	if(address == NULL)
 		address = "/NOMATCH!/";
-	masktype = parse_netmask(address, (struct sockaddr *)&addr, &bits);
+	masktype = parse_netmask(address, &addr, &bits);
 #ifdef RB_IPV6
 	if(masktype == HM_IPV6)
 	{
@@ -541,7 +541,7 @@ add_conf_by_address(const char *address, int type, const char *username, const c
 	if(address == NULL)
 		address = "/NOMATCH!/";
 	arec = rb_malloc(sizeof(struct AddressRec));
-	masktype = parse_netmask(address, (struct sockaddr *)&arec->Mask.ipa.addr, &bits);
+	masktype = parse_netmask(address, &arec->Mask.ipa.addr, &bits);
 	arec->Mask.ipa.bits = bits;
 	arec->masktype = masktype;
 #ifdef RB_IPV6
@@ -587,7 +587,7 @@ delete_one_address_conf(const char *address, struct ConfItem *aconf)
 	unsigned long hv;
 	struct AddressRec *arec, *arecl = NULL;
 	struct rb_sockaddr_storage addr;
-	masktype = parse_netmask(address, (struct sockaddr *)&addr, &bits);
+	masktype = parse_netmask(address, &addr, &bits);
 #ifdef RB_IPV6
 	if(masktype == HM_IPV6)
 	{
@@ -741,7 +741,8 @@ show_iline_prefix(struct Client *sptr, struct ConfItem *aconf, char *name)
 void
 report_auth(struct Client *client_p)
 {
-	char *name, *host, *pass, *user, *classname;
+	char *name, *host, *user, *classname;
+	const char *pass;
 	struct AddressRec *arec;
 	struct ConfItem *aconf;
 	int i, port;
diff --git a/src/match.c b/src/match.c
index 7f69e2f8..d06b7420 100644
--- a/src/match.c
+++ b/src/match.c
@@ -331,14 +331,14 @@ int comp_with_mask_sock(struct sockaddr *addr, struct sockaddr *dest, u_int mask
 
 	if (addr->sa_family == AF_INET)
 	{
-		iaddr = &((struct sockaddr_in *)addr)->sin_addr;
-		idest = &((struct sockaddr_in *)dest)->sin_addr;
+		iaddr = &((struct sockaddr_in *)(void *)addr)->sin_addr;
+		idest = &((struct sockaddr_in *)(void *)dest)->sin_addr;
 	}
 #ifdef RB_IPV6
 	else
 	{
-		iaddr = &((struct sockaddr_in6 *)addr)->sin6_addr;
-		idest = &((struct sockaddr_in6 *)dest)->sin6_addr;
+		iaddr = &((struct sockaddr_in6 *)(void *)addr)->sin6_addr;
+		idest = &((struct sockaddr_in6 *)(void *)dest)->sin6_addr;
 
 	}
 #endif
diff --git a/src/modules.c b/src/modules.c
index 0c845a93..85da9f09 100644
--- a/src/modules.c
+++ b/src/modules.c
@@ -802,7 +802,7 @@ load_a_module(const char *path, int warn, int core)
 	{
 	case 1:
 		{
-			struct mapi_mheader_av1 *mheader = (struct mapi_mheader_av1 *) mapi_version;	/* see above */
+			struct mapi_mheader_av1 *mheader = (struct mapi_mheader_av1 *)(void *)mapi_version;	/* see above */
 			if(mheader->mapi_register && (mheader->mapi_register() == -1))
 			{
 				ilog(L_MAIN, "Module %s indicated failure during load.",
diff --git a/src/newconf.c b/src/newconf.c
index 35aa2342..62bd8d79 100644
--- a/src/newconf.c
+++ b/src/newconf.c
@@ -1864,7 +1864,7 @@ conf_set_blacklist_matches(void *data)
 			/* Check for validity */
 			if (*p == '.')
 				type = BLACKLIST_FILTER_ALL;
-			else if (!isalnum(*p))
+			else if (!isalnum((unsigned char)*p))
 			{
 				conf_report_error("blacklist::matches has invalid IP match entry %s",
 						str);
diff --git a/src/parse.c b/src/parse.c
index c382cadd..3257d482 100644
--- a/src/parse.c
+++ b/src/parse.c
@@ -49,7 +49,7 @@ struct Dictionary *alias_dict = NULL;
 /* parv[0] is not used, and parv[LAST] == NULL */
 static char *para[MAXPARA + 2];
 
-static void cancel_clients(struct Client *, struct Client *, char *);
+static void cancel_clients(struct Client *, struct Client *);
 static void remove_unknown(struct Client *, char *, char *);
 
 static void do_numeric(char[], struct Client *, struct Client *, int, char **);
@@ -169,7 +169,7 @@ parse(struct Client *client_p, char *pbuffer, char *bufend)
 			if(from->from != client_p)
 			{
 				ServerStats.is_wrdi++;
-				cancel_clients(client_p, from, pbuffer);
+				cancel_clients(client_p, from);
 				return;
 			}
 		}
@@ -269,7 +269,7 @@ parse(struct Client *client_p, char *pbuffer, char *bufend)
 		return;
 	}
 
-	if(handle_command(mptr, client_p, from, i, /* XXX discards const!!! */ (const char **)para) < -1)
+	if(handle_command(mptr, client_p, from, i, /* XXX discards const!!! */ (const char **)(void *)para) < -1)
 	{
 		char *p;
 		for (p = pbuffer; p <= end; p += 8)
@@ -489,12 +489,12 @@ report_messages(struct Client *source_p)
 /* cancel_clients()
  *
  * inputs	- client who sent us the message, client with fake
- *		  direction, command
+ *		  direction
  * outputs	- a given warning about the fake direction
  * side effects -
  */
 static void
-cancel_clients(struct Client *client_p, struct Client *source_p, char *cmd)
+cancel_clients(struct Client *client_p, struct Client *source_p)
 {
 	/* ok, fake prefix happens naturally during a burst on a nick
 	 * collision with TS5, we cant kill them because one client has to
diff --git a/src/privilege.c b/src/privilege.c
index c082cbca..b0d8a0d2 100644
--- a/src/privilege.c
+++ b/src/privilege.c
@@ -29,7 +29,7 @@
 #include "logger.h"
 #include "send.h"
 
-static rb_dlink_list privilegeset_list = {};
+static rb_dlink_list privilegeset_list = {NULL, NULL, 0};
 
 int
 privilegeset_in_set(struct PrivilegeSet *set, const char *priv)
diff --git a/src/res.c b/src/res.c
index c330987c..5fe6fc6d 100644
--- a/src/res.c
+++ b/src/res.c
@@ -552,7 +552,7 @@ static void query_name(struct reslist *request)
 	if ((request_len =
 	     irc_res_mkquery(request->queryname, C_IN, request->type, (unsigned char *)buf, sizeof(buf))) > 0)
 	{
-		HEADER *header = (HEADER *) buf;
+		HEADER *header = (HEADER *)(void *)buf;
 		header->id = request->id;
 		++request->sends;
 
@@ -784,7 +784,7 @@ static int res_read_single_reply(rb_fde_t *F, void *data)
 	/*
 	 * convert DNS reply reader from Network byte order to CPU byte order.
 	 */
-	header = (HEADER *) buf;
+	header = (HEADER *)(void *)buf;
 	header->ancount = ntohs(header->ancount);
 	header->qdcount = ntohs(header->qdcount);
 	header->nscount = ntohs(header->nscount);
diff --git a/src/reslib.c b/src/reslib.c
index e3a643cb..c2495071 100644
--- a/src/reslib.c
+++ b/src/reslib.c
@@ -478,7 +478,7 @@ irc_ns_name_ntop(const char *src, char *dst, size_t dstsiz)
  */
 static int
 irc_dn_comp(const char *src, unsigned char *dst, int dstsiz,
-            unsigned char **dnptrs, unsigned char **lastdnptr)
+            const unsigned char **dnptrs, const unsigned char **lastdnptr)
 {
   return(irc_ns_name_compress(src, dst, (size_t)dstsiz,
                               (const unsigned char **)dnptrs,
@@ -1145,7 +1145,7 @@ irc_res_mkquery(
 	HEADER *hp;
 	unsigned char *cp;
 	int n;
-	unsigned char *dnptrs[20], **dpp, **lastdnptr;
+	const unsigned char *dnptrs[20], **dpp, **lastdnptr;
 
 	/*
 	 * Initialize header fields.
@@ -1153,7 +1153,7 @@ irc_res_mkquery(
 	if ((buf == NULL) || (buflen < HFIXEDSZ))
 		return (-1);
 	memset(buf, 0, HFIXEDSZ);
-	hp = (HEADER *) buf;
+	hp = (HEADER *)(void *)buf;
 
 	hp->id = 0;
 	hp->opcode = QUERY;
diff --git a/src/s_conf.c b/src/s_conf.c
index a4318f1b..d31b1f41 100644
--- a/src/s_conf.c
+++ b/src/s_conf.c
@@ -75,7 +75,7 @@ rb_dlink_list service_list;
 /* internally defined functions */
 static void set_default_conf(void);
 static void validate_conf(void);
-static void read_conf(FILE *);
+static void read_conf(void);
 static void clear_out_old_conf(void);
 
 static void expire_prop_bans(void *list);
@@ -818,12 +818,12 @@ set_default_conf(void)
  * read_conf()
  *
  *
- * inputs       - file descriptor pointing to config file to use
+ * inputs       - None
  * output       - None
  * side effects	- Read configuration file.
  */
 static void
-read_conf(FILE * file)
+read_conf(void)
 {
 	lineno = 0;
 
@@ -1280,7 +1280,7 @@ get_oper_name(struct Client *client_p)
  */
 void
 get_printable_conf(struct ConfItem *aconf, char **name, char **host,
-		   char **pass, char **user, int *port, char **classname)
+		   const char **pass, char **user, int *port, char **classname)
 {
 	static char null[] = "<NULL>";
 	static char zero[] = "default";
@@ -1399,7 +1399,7 @@ read_conf_files(int cold)
 	}
 
 	call_hook(h_conf_read_start, NULL);
-	read_conf(conf_fbfile_in);
+	read_conf();
 	call_hook(h_conf_read_end, NULL);
 
 	fclose(conf_fbfile_in);
diff --git a/src/s_newconf.c b/src/s_newconf.c
index 7ca43ad6..ae250fc3 100644
--- a/src/s_newconf.c
+++ b/src/s_newconf.c
@@ -291,7 +291,7 @@ find_oper_conf(const char *username, const char *host, const char *locip, const
 	int bits, cbits;
 	rb_dlink_node *ptr;
 
-	parse_netmask(locip, (struct sockaddr *)&cip, &cbits);
+	parse_netmask(locip, &cip, &cbits);
 
 	RB_DLINK_FOREACH(ptr, oper_conf_list.head)
 	{
@@ -303,7 +303,7 @@ find_oper_conf(const char *username, const char *host, const char *locip, const
 
 		rb_strlcpy(addr, oper_p->host, sizeof(addr));
 
-		if(parse_netmask(addr, (struct sockaddr *)&ip, &bits) != HM_HOST)
+		if(parse_netmask(addr, &ip, &bits) != HM_HOST)
 		{
 			if(ip.ss_family == cip.ss_family &&
 			   comp_with_mask_sock((struct sockaddr *)&ip, (struct sockaddr *)&cip, bits))
diff --git a/src/s_serv.c b/src/s_serv.c
index fc6db9cc..cf0dd391 100644
--- a/src/s_serv.c
+++ b/src/s_serv.c
@@ -578,7 +578,7 @@ burst_TS6(struct Client *client_p)
 		if(!IsPerson(target_p))
 			continue;
 
-		send_umode(NULL, target_p, 0, 0, ubuf);
+		send_umode(NULL, target_p, 0, ubuf);
 		if(!*ubuf)
 		{
 			ubuf[0] = '+';
diff --git a/src/s_user.c b/src/s_user.c
index 551b9e50..0e3c41b5 100644
--- a/src/s_user.c
+++ b/src/s_user.c
@@ -599,9 +599,9 @@ introduce_client(struct Client *client_p, struct Client *source_p, struct User *
 	hook_data_client hdata2;
 
 	if(MyClient(source_p))
-		send_umode(source_p, source_p, 0, 0, ubuf);
+		send_umode(source_p, source_p, 0, ubuf);
 	else
-		send_umode(NULL, source_p, 0, 0, ubuf);
+		send_umode(NULL, source_p, 0, ubuf);
 
 	if(!*ubuf)
 	{
@@ -1155,7 +1155,7 @@ user_mode(struct Client *client_p, struct Client *source_p, int parc, const char
  * -avalon
  */
 void
-send_umode(struct Client *client_p, struct Client *source_p, int old, int sendmask, char *umode_buf)
+send_umode(struct Client *client_p, struct Client *source_p, int old, char *umode_buf)
 {
 	int i;
 	int flag;
@@ -1216,7 +1216,7 @@ send_umode_out(struct Client *client_p, struct Client *source_p, int old)
 	char buf[BUFSIZE];
 	rb_dlink_node *ptr;
 
-	send_umode(NULL, source_p, old, 0, buf);
+	send_umode(NULL, source_p, old, buf);
 
 	RB_DLINK_FOREACH(ptr, serv_list.head)
 	{
@@ -1231,7 +1231,7 @@ send_umode_out(struct Client *client_p, struct Client *source_p, int old)
 	}
 
 	if(client_p && MyClient(client_p))
-		send_umode(client_p, source_p, old, 0, buf);
+		send_umode(client_p, source_p, old, buf);
 }
 
 /*
diff --git a/src/sslproc.c b/src/sslproc.c
index 4f2de979..f7d0b9c6 100644
--- a/src/sslproc.c
+++ b/src/sslproc.c
@@ -91,23 +91,6 @@ int32_to_buf(char *buf, int32_t x)
 	return;
 }
 
-
-static inline uint16_t
-buf_to_uint16(char *buf)
-{
-	uint16_t x;
-	memcpy(&x, buf, sizeof(x));
-	return x;
-}
-
-static inline void
-uint16_to_buf(char *buf, uint16_t x)
-{
-	memcpy(buf, &x, sizeof(x));
-	return;
-}
-
-
 static ssl_ctl_t *
 allocate_ssl_daemon(rb_fde_t * F, rb_fde_t * P, int pid)
 {
diff --git a/ssld/ssld.c b/ssld/ssld.c
index d8e1b455..cad491c2 100644
--- a/ssld/ssld.c
+++ b/ssld/ssld.c
@@ -51,22 +51,6 @@ int32_to_buf(uint8_t *buf, int32_t x)
 	return;
 }
 
-static inline uint16_t
-buf_to_uint16(uint8_t *buf)
-{
-	uint16_t x;
-	memcpy(&x, buf, sizeof(x));
-	return x;
-}
-
-static inline void
-uint16_to_buf(uint8_t *buf, uint16_t x)
-{
-	memcpy(buf, &x, sizeof(x));
-	return;
-}
-
-
 static char inbuf[READBUF_SIZE];
 #ifdef HAVE_LIBZ
 static char outbuf[READBUF_SIZE];
diff --git a/tools/mkpasswd.c b/tools/mkpasswd.c
index 958d6dff..4f80b970 100644
--- a/tools/mkpasswd.c
+++ b/tools/mkpasswd.c
@@ -55,9 +55,6 @@ static void brief_usage(void);
 static char saltChars[] = "./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
        /* 0 .. 63, ascii - 64 */
 
-extern char *optarg;
-
-
 #ifdef __MINGW32__
 #include <conio.h>
 #ifdef PASS_MAX
@@ -72,7 +69,7 @@ getpass(const char *prompt)
 	int c;
 	int i = 0;
 
-	memset(getpassbuf, sizeof(getpassbuf), 0);
+	memset(getpassbuf, 0, sizeof(getpassbuf));
 	fputs(prompt, stderr);
 	for(;;)
 	{