[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>
diff --git a/net/netfilter/xt_tcpudp.c b/net/netfilter/xt_tcpudp.c
index ca9ccdd..9ecc4a5 100644
--- a/net/netfilter/xt_tcpudp.c
+++ b/net/netfilter/xt_tcpudp.c
@@ -27,21 +27,18 @@
/* Returns 1 if the port is matched by the range, 0 otherwise */
-static inline int
-port_match(u_int16_t min, u_int16_t max, u_int16_t port, int invert)
+static inline bool
+port_match(u_int16_t min, u_int16_t max, u_int16_t port, bool invert)
{
- int ret;
-
- ret = (port >= min && port <= max) ^ invert;
- return ret;
+ return (port >= min && port <= max) ^ invert;
}
-static int
+static bool
tcp_find_option(u_int8_t option,
const struct sk_buff *skb,
unsigned int protoff,
unsigned int optlen,
- int invert,
+ bool invert,
bool *hotdrop)
{
/* tcp.doff is only 4 bits, ie. max 15 * 4 bytes */
@@ -58,7 +55,7 @@
optlen, _opt);
if (op == NULL) {
*hotdrop = true;
- return 0;
+ return false;
}
for (i = 0; i < optlen; ) {
@@ -70,7 +67,7 @@
return invert;
}
-static int
+static bool
tcp_match(const struct sk_buff *skb,
const struct net_device *in,
const struct net_device *out,
@@ -95,7 +92,7 @@
*hotdrop = true;
}
/* Must not be a fragment. */
- return 0;
+ return false;
}
#define FWINVTCP(bool,invflg) ((bool) ^ !!(tcpinfo->invflags & invflg))
@@ -106,33 +103,33 @@
can't. Hence, no choice but to drop. */
duprintf("Dropping evil TCP offset=0 tinygram.\n");
*hotdrop = true;
- return 0;
+ return false;
}
if (!port_match(tcpinfo->spts[0], tcpinfo->spts[1],
ntohs(th->source),
!!(tcpinfo->invflags & XT_TCP_INV_SRCPT)))
- return 0;
+ return false;
if (!port_match(tcpinfo->dpts[0], tcpinfo->dpts[1],
ntohs(th->dest),
!!(tcpinfo->invflags & XT_TCP_INV_DSTPT)))
- return 0;
+ return false;
if (!FWINVTCP((((unsigned char *)th)[13] & tcpinfo->flg_mask)
== tcpinfo->flg_cmp,
XT_TCP_INV_FLAGS))
- return 0;
+ return false;
if (tcpinfo->option) {
if (th->doff * 4 < sizeof(_tcph)) {
*hotdrop = true;
- return 0;
+ return false;
}
if (!tcp_find_option(tcpinfo->option, skb, protoff,
th->doff*4 - sizeof(_tcph),
tcpinfo->invflags & XT_TCP_INV_OPTION,
hotdrop))
- return 0;
+ return false;
}
- return 1;
+ return true;
}
/* Called when user tries to insert an entry of this type. */
@@ -149,7 +146,7 @@
return !(tcpinfo->invflags & ~XT_TCP_INV_MASK);
}
-static int
+static bool
udp_match(const struct sk_buff *skb,
const struct net_device *in,
const struct net_device *out,
@@ -164,7 +161,7 @@
/* Must not be a fragment. */
if (offset)
- return 0;
+ return false;
uh = skb_header_pointer(skb, protoff, sizeof(_udph), &_udph);
if (uh == NULL) {
@@ -172,7 +169,7 @@
can't. Hence, no choice but to drop. */
duprintf("Dropping evil UDP tinygram.\n");
*hotdrop = true;
- return 0;
+ return false;
}
return port_match(udpinfo->spts[0], udpinfo->spts[1],
