[NETFILTER]: x_tables: switch xt_match->match to bool

Switch the return type of match functions to boolean

Signed-off-by: Jan Engelhardt <jengelh@gmx.de>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/ipv6/netfilter/ip6_tables.c

@@ -96,7 +96,7 @@ ip6t_ext_hdr(u8 nexthdr)
 }
 
 /* Returns whether matches rule or not. */
-static inline int
+static inline bool
 ip6_packet_match(const struct sk_buff *skb,
 		 const char *indev,
 		 const char *outdev,
@@ -122,7 +122,7 @@ ip6_packet_match(const struct sk_buff *skb,
 		dprintf("DST: %u. Mask: %u. Target: %u.%s\n", ip->daddr,
 			ipinfo->dmsk.s_addr, ipinfo->dst.s_addr,
 			ipinfo->invflags & IP6T_INV_DSTIP ? " (INV)" : "");*/
-		return 0;
+		return false;
 	}
 
 	/* Look for ifname matches; this should unroll nicely. */
@@ -136,7 +136,7 @@ ip6_packet_match(const struct sk_buff *skb,
 		dprintf("VIA in mismatch (%s vs %s).%s\n",
 			indev, ip6info->iniface,
 			ip6info->invflags&IP6T_INV_VIA_IN ?" (INV)":"");
-		return 0;
+		return false;
 	}
 
 	for (i = 0, ret = 0; i < IFNAMSIZ/sizeof(unsigned long); i++) {
@@ -149,7 +149,7 @@ ip6_packet_match(const struct sk_buff *skb,
 		dprintf("VIA out mismatch (%s vs %s).%s\n",
 			outdev, ip6info->outiface,
 			ip6info->invflags&IP6T_INV_VIA_OUT ?" (INV)":"");
-		return 0;
+		return false;
 	}
 
 /* ... might want to do something with class and flowlabel here ... */
@@ -163,7 +163,7 @@ ip6_packet_match(const struct sk_buff *skb,
 		if (protohdr < 0) {
 			if (_frag_off == 0)
 				*hotdrop = true;
-			return 0;
+			return false;
 		}
 		*fragoff = _frag_off;
 
@@ -174,17 +174,17 @@ ip6_packet_match(const struct sk_buff *skb,
 
 		if (ip6info->proto == protohdr) {
 			if(ip6info->invflags & IP6T_INV_PROTO) {
-				return 0;
+				return false;
 			}
-			return 1;
+			return true;
 		}
 
 		/* We need match for the '-p all', too! */
 		if ((ip6info->proto != 0) &&
 			!(ip6info->invflags & IP6T_INV_PROTO))
-			return 0;
+			return false;
 	}
-	return 1;
+	return true;
 }
 
 /* should be ip6 safe */
@@ -219,20 +219,20 @@ ip6t_error(struct sk_buff **pskb,
 }
 
 static inline
-int do_match(struct ip6t_entry_match *m,
-	     const struct sk_buff *skb,
-	     const struct net_device *in,
-	     const struct net_device *out,
-	     int offset,
-	     unsigned int protoff,
-	     bool *hotdrop)
+bool do_match(struct ip6t_entry_match *m,
+	      const struct sk_buff *skb,
+	      const struct net_device *in,
+	      const struct net_device *out,
+	      int offset,
+	      unsigned int protoff,
+	      bool *hotdrop)
 {
 	/* Stop iteration if it doesn't match */
 	if (!m->u.kernel.match->match(skb, in, out, m->u.kernel.match, m->data,
 				      offset, protoff, hotdrop))
-		return 1;
+		return true;
 	else
-		return 0;
+		return false;
 }
 
 static inline struct ip6t_entry *
@@ -1291,7 +1291,7 @@ icmp6_type_code_match(u_int8_t test_type, u_int8_t min_code, u_int8_t max_code,
 		^ invert;
 }
 
-static int
+static bool
 icmp6_match(const struct sk_buff *skb,
 	   const struct net_device *in,
 	   const struct net_device *out,
@@ -1306,7 +1306,7 @@ icmp6_match(const struct sk_buff *skb,
 
 	/* Must not be a fragment. */
 	if (offset)
-		return 0;
+		return false;
 
 	ic = skb_header_pointer(skb, protoff, sizeof(_icmp), &_icmp);
 	if (ic == NULL) {
@@ -1314,7 +1314,7 @@ icmp6_match(const struct sk_buff *skb,
 		   can't.  Hence, no choice but to drop. */
 		duprintf("Dropping evil ICMP tinygram.\n");
 		*hotdrop = true;
-		return 0;
+		return false;
 	}
 
 	return icmp6_type_code_match(icmpinfo->type,

net/ipv6/netfilter/ip6t_ah.c

@@ -30,10 +30,10 @@ MODULE_AUTHOR("Andras Kis-Szabo <kisza@sch.bme.hu>");
 #endif
 
 /* Returns 1 if the spi is matched by the range, 0 otherwise */
-static inline int
-spi_match(u_int32_t min, u_int32_t max, u_int32_t spi, int invert)
+static inline bool
+spi_match(u_int32_t min, u_int32_t max, u_int32_t spi, bool invert)
 {
-	int r=0;
+	bool r;
 	DEBUGP("ah spi_match:%c 0x%x <= 0x%x <= 0x%x",invert? '!':' ',
 	       min,spi,max);
 	r = (spi >= min && spi <= max) ^ invert;
@@ -41,7 +41,7 @@ spi_match(u_int32_t min, u_int32_t max, u_int32_t spi, int invert)
 	return r;
 }
 
-static int
+static bool
 match(const struct sk_buff *skb,
       const struct net_device *in,
       const struct net_device *out,
@@ -61,13 +61,13 @@ match(const struct sk_buff *skb,
 	if (err < 0) {
 		if (err != -ENOENT)
 			*hotdrop = true;
-		return 0;
+		return false;
 	}
 
 	ah = skb_header_pointer(skb, ptr, sizeof(_ah), &_ah);
 	if (ah == NULL) {
 		*hotdrop = true;
-		return 0;
+		return false;
 	}
 
 	hdrlen = (ah->hdrlen + 2) << 2;

net/ipv6/netfilter/ip6t_eui64.c

@@ -19,7 +19,7 @@ MODULE_DESCRIPTION("IPv6 EUI64 address checking match");
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Andras Kis-Szabo <kisza@sch.bme.hu>");
 
-static int
+static bool
 match(const struct sk_buff *skb,
       const struct net_device *in,
       const struct net_device *out,
@@ -36,7 +36,7 @@ match(const struct sk_buff *skb,
 	      (skb_mac_header(skb) + ETH_HLEN) <= skb->data) &&
 	    offset != 0) {
 		*hotdrop = true;
-		return 0;
+		return false;
 	}
 
 	memset(eui64, 0, sizeof(eui64));
@@ -55,11 +55,11 @@ match(const struct sk_buff *skb,
 				i++;
 
 			if (i == 8)
-				return 1;
+				return true;
 		}
 	}
 
-	return 0;
+	return false;
 }
 
 static struct xt_match eui64_match = {

net/ipv6/netfilter/ip6t_frag.c

@@ -29,10 +29,10 @@ MODULE_AUTHOR("Andras Kis-Szabo <kisza@sch.bme.hu>");
 #endif
 
 /* Returns 1 if the id is matched by the range, 0 otherwise */
-static inline int
-id_match(u_int32_t min, u_int32_t max, u_int32_t id, int invert)
+static inline bool
+id_match(u_int32_t min, u_int32_t max, u_int32_t id, bool invert)
 {
-	int r = 0;
+	bool r;
 	DEBUGP("frag id_match:%c 0x%x <= 0x%x <= 0x%x", invert ? '!' : ' ',
 	       min, id, max);
 	r = (id >= min && id <= max) ^ invert;
@@ -40,7 +40,7 @@ id_match(u_int32_t min, u_int32_t max, u_int32_t id, int invert)
 	return r;
 }
 
-static int
+static bool
 match(const struct sk_buff *skb,
       const struct net_device *in,
       const struct net_device *out,
@@ -59,13 +59,13 @@ match(const struct sk_buff *skb,
 	if (err < 0) {
 		if (err != -ENOENT)
 			*hotdrop = true;
-		return 0;
+		return false;
 	}
 
 	fh = skb_header_pointer(skb, ptr, sizeof(_frag), &_frag);
 	if (fh == NULL) {
 		*hotdrop = true;
-		return 0;
+		return false;
 	}
 
 	DEBUGP("INFO %04X ", fh->frag_off);

net/ipv6/netfilter/ip6t_hbh.c

@@ -47,7 +47,7 @@ MODULE_ALIAS("ip6t_dst");
  *	5	-> RTALERT 2 x x
  */
 
-static int
+static bool
 match(const struct sk_buff *skb,
       const struct net_device *in,
       const struct net_device *out,
@@ -62,7 +62,7 @@ match(const struct sk_buff *skb,
 	unsigned int temp;
 	unsigned int ptr;
 	unsigned int hdrlen = 0;
-	unsigned int ret = 0;
+	bool ret = false;
 	u8 _opttype, *tp = NULL;
 	u8 _optlen, *lp = NULL;
 	unsigned int optlen;
@@ -72,19 +72,19 @@ match(const struct sk_buff *skb,
 	if (err < 0) {
 		if (err != -ENOENT)
 			*hotdrop = true;
-		return 0;
+		return false;
 	}
 
 	oh = skb_header_pointer(skb, ptr, sizeof(_optsh), &_optsh);
 	if (oh == NULL) {
 		*hotdrop = true;
-		return 0;
+		return false;
 	}
 
 	hdrlen = ipv6_optlen(oh);
 	if (skb->len - ptr < hdrlen) {
 		/* Packet smaller than it's length field */
-		return 0;
+		return false;
 	}
 
 	DEBUGP("IPv6 OPTS LEN %u %u ", hdrlen, oh->hdrlen);
@@ -123,7 +123,7 @@ match(const struct sk_buff *skb,
 				DEBUGP("Tbad %02X %02X\n",
 				       *tp,
 				       (optinfo->opts[temp] & 0xFF00) >> 8);
-				return 0;
+				return false;
 			} else {
 				DEBUGP("Tok ");
 			}
@@ -144,7 +144,7 @@ match(const struct sk_buff *skb,
 				if (spec_len != 0x00FF && spec_len != *lp) {
 					DEBUGP("Lbad %02X %04X\n", *lp,
 					       spec_len);
-					return 0;
+					return false;
 				}
 				DEBUGP("Lok ");
 				optlen = *lp + 2;
@@ -167,10 +167,10 @@ match(const struct sk_buff *skb,
 		if (temp == optinfo->optsnr)
 			return ret;
 		else
-			return 0;
+			return false;
 	}
 
-	return 0;
+	return false;
 }
 
 /* Called when user tries to insert an entry of this type. */

net/ipv6/netfilter/ip6t_hl.c

@@ -19,10 +19,10 @@ MODULE_AUTHOR("Maciej Soltysiak <solt@dns.toxicfilms.tv>");
 MODULE_DESCRIPTION("IP tables Hop Limit matching module");
 MODULE_LICENSE("GPL");
 
-static int match(const struct sk_buff *skb,
-		 const struct net_device *in, const struct net_device *out,
-		 const struct xt_match *match, const void *matchinfo,
-		 int offset, unsigned int protoff, bool *hotdrop)
+static bool match(const struct sk_buff *skb,
+		  const struct net_device *in, const struct net_device *out,
+		  const struct xt_match *match, const void *matchinfo,
+		  int offset, unsigned int protoff, bool *hotdrop)
 {
 	const struct ip6t_hl_info *info = matchinfo;
 	const struct ipv6hdr *ip6h = ipv6_hdr(skb);
@@ -43,10 +43,10 @@ static int match(const struct sk_buff *skb,
 		default:
 			printk(KERN_WARNING "ip6t_hl: unknown mode %d\n",
 				info->mode);
-			return 0;
+			return false;
 	}
 
-	return 0;
+	return false;
 }
 
 static struct xt_match hl_match = {

net/ipv6/netfilter/ip6t_ipv6header.c

@@ -26,7 +26,7 @@ MODULE_LICENSE("GPL");
 MODULE_DESCRIPTION("IPv6 headers match");
 MODULE_AUTHOR("Andras Kis-Szabo <kisza@sch.bme.hu>");
 
-static int
+static bool
 ipv6header_match(const struct sk_buff *skb,
 		 const struct net_device *in,
 		 const struct net_device *out,
@@ -58,7 +58,7 @@ ipv6header_match(const struct sk_buff *skb,
 
 		/* Is there enough space for the next ext header? */
 		if (len < (int)sizeof(struct ipv6_opt_hdr))
-			return 0;
+			return false;
 		/* No more exthdr -> evaluate */
 		if (nexthdr == NEXTHDR_NONE) {
 			temp |= MASK_NONE;
@@ -99,7 +99,7 @@ ipv6header_match(const struct sk_buff *skb,
 			temp |= MASK_DSTOPTS;
 			break;
 		default:
-			return 0;
+			return false;
 			break;
 		}
 

net/ipv6/netfilter/ip6t_mh.c

@@ -31,16 +31,13 @@ MODULE_LICENSE("GPL");
 #endif
 
 /* Returns 1 if the type is matched by the range, 0 otherwise */
-static inline int
-type_match(u_int8_t min, u_int8_t max, u_int8_t type, int invert)
+static inline bool
+type_match(u_int8_t min, u_int8_t max, u_int8_t type, bool invert)
 {
-	int ret;
-
-	ret = (type >= min && type <= max) ^ invert;
-	return ret;
+	return (type >= min && type <= max) ^ invert;
 }
 
-static int
+static bool
 match(const struct sk_buff *skb,
 	 const struct net_device *in,
 	 const struct net_device *out,
@@ -55,7 +52,7 @@ match(const struct sk_buff *skb,
 
 	/* Must not be a fragment. */
 	if (offset)
-		return 0;
+		return false;
 
 	mh = skb_header_pointer(skb, protoff, sizeof(_mh), &_mh);
 	if (mh == NULL) {
@@ -63,14 +60,14 @@ match(const struct sk_buff *skb,
 		   can't.  Hence, no choice but to drop. */
 		duprintf("Dropping evil MH tinygram.\n");
 		*hotdrop = true;
-		return 0;
+		return false;
 	}
 
 	if (mh->ip6mh_proto != IPPROTO_NONE) {
 		duprintf("Dropping invalid MH Payload Proto: %u\n",
 			 mh->ip6mh_proto);
 		*hotdrop = true;
-		return 0;
+		return false;
 	}
 
 	return type_match(mhinfo->types[0], mhinfo->types[1], mh->ip6mh_type,

net/ipv6/netfilter/ip6t_owner.c

@@ -23,7 +23,7 @@ MODULE_DESCRIPTION("IP6 tables owner matching module");
 MODULE_LICENSE("GPL");
 
 
-static int
+static bool
 match(const struct sk_buff *skb,
       const struct net_device *in,
       const struct net_device *out,
@@ -36,21 +36,21 @@ match(const struct sk_buff *skb,
 	const struct ip6t_owner_info *info = matchinfo;
 
 	if (!skb->sk || !skb->sk->sk_socket || !skb->sk->sk_socket->file)
-		return 0;
+		return false;
 
 	if (info->match & IP6T_OWNER_UID) {
 		if ((skb->sk->sk_socket->file->f_uid != info->uid) ^
 		    !!(info->invert & IP6T_OWNER_UID))
-			return 0;
+			return false;
 	}
 
 	if (info->match & IP6T_OWNER_GID) {
 		if ((skb->sk->sk_socket->file->f_gid != info->gid) ^
 		    !!(info->invert & IP6T_OWNER_GID))
-			return 0;
+			return false;
 	}
 
-	return 1;
+	return true;
 }
 
 static int

net/ipv6/netfilter/ip6t_rt.c

@@ -31,10 +31,10 @@ MODULE_AUTHOR("Andras Kis-Szabo <kisza@sch.bme.hu>");
 #endif
 
 /* Returns 1 if the id is matched by the range, 0 otherwise */
-static inline int
-segsleft_match(u_int32_t min, u_int32_t max, u_int32_t id, int invert)
+static inline bool
+segsleft_match(u_int32_t min, u_int32_t max, u_int32_t id, bool invert)
 {
-	int r = 0;
+	bool r;
 	DEBUGP("rt segsleft_match:%c 0x%x <= 0x%x <= 0x%x",
 	       invert ? '!' : ' ', min, id, max);
 	r = (id >= min && id <= max) ^ invert;
@@ -42,7 +42,7 @@ segsleft_match(u_int32_t min, u_int32_t max, u_int32_t id, int invert)
 	return r;
 }
 
-static int
+static bool
 match(const struct sk_buff *skb,
       const struct net_device *in,
       const struct net_device *out,
@@ -57,7 +57,7 @@ match(const struct sk_buff *skb,
 	unsigned int temp;
 	unsigned int ptr;
 	unsigned int hdrlen = 0;
-	unsigned int ret = 0;
+	bool ret = false;
 	struct in6_addr *ap, _addr;
 	int err;
 
@@ -65,19 +65,19 @@ match(const struct sk_buff *skb,
 	if (err < 0) {
 		if (err != -ENOENT)
 			*hotdrop = true;
-		return 0;
+		return false;
 	}
 
 	rh = skb_header_pointer(skb, ptr, sizeof(_route), &_route);
 	if (rh == NULL) {
 		*hotdrop = true;
-		return 0;
+		return false;
 	}
 
 	hdrlen = ipv6_optlen(rh);
 	if (skb->len - ptr < hdrlen) {
 		/* Pcket smaller than its length field */
-		return 0;
+		return false;
 	}
 
 	DEBUGP("IPv6 RT LEN %u %u ", hdrlen, rh->hdrlen);
@@ -136,7 +136,7 @@ match(const struct sk_buff *skb,
 		DEBUGP("Not strict ");
 		if (rtinfo->addrnr > (unsigned int)((hdrlen - 8) / 16)) {
 			DEBUGP("There isn't enough space\n");
-			return 0;
+			return false;
 		} else {
 			unsigned int i = 0;
 
@@ -164,13 +164,13 @@ match(const struct sk_buff *skb,
 			if (i == rtinfo->addrnr)
 				return ret;
 			else
-				return 0;
+				return false;
 		}
 	} else {
 		DEBUGP("Strict ");
 		if (rtinfo->addrnr > (unsigned int)((hdrlen - 8) / 16)) {
 			DEBUGP("There isn't enough space\n");
-			return 0;
+			return false;
 		} else {
 			DEBUGP("#%d ", rtinfo->addrnr);
 			for (temp = 0; temp < rtinfo->addrnr; temp++) {
@@ -190,11 +190,11 @@ match(const struct sk_buff *skb,
 			    (temp == (unsigned int)((hdrlen - 8) / 16)))
 				return ret;
 			else
-				return 0;
+				return false;
 		}
 	}
 
-	return 0;
+	return false;
 }
 
 /* Called when user tries to insert an entry of this type. */