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path: root/net/ipv6/netfilter/ip6t_rt.c
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Diffstat (limited to 'net/ipv6/netfilter/ip6t_rt.c')
-rw-r--r--net/ipv6/netfilter/ip6t_rt.c134
1 files changed, 65 insertions, 69 deletions
diff --git a/net/ipv6/netfilter/ip6t_rt.c b/net/ipv6/netfilter/ip6t_rt.c
index 81ab00d8c182..357cea703bd9 100644
--- a/net/ipv6/netfilter/ip6t_rt.c
+++ b/net/ipv6/netfilter/ip6t_rt.c
@@ -24,25 +24,19 @@ MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("IPv6 RT match");
MODULE_AUTHOR("Andras Kis-Szabo <kisza@sch.bme.hu>");
-#if 0
-#define DEBUGP printk
-#else
-#define DEBUGP(format, args...)
-#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;
- DEBUGP("rt segsleft_match:%c 0x%x <= 0x%x <= 0x%x",
- invert ? '!' : ' ', min, id, max);
+ bool r;
+ pr_debug("rt segsleft_match:%c 0x%x <= 0x%x <= 0x%x",
+ invert ? '!' : ' ', min, id, max);
r = (id >= min && id <= max) ^ invert;
- DEBUGP(" result %s\n", r ? "PASS" : "FAILED");
+ pr_debug(" result %s\n", r ? "PASS" : "FAILED");
return r;
}
-static int
+static bool
match(const struct sk_buff *skb,
const struct net_device *in,
const struct net_device *out,
@@ -50,59 +44,61 @@ match(const struct sk_buff *skb,
const void *matchinfo,
int offset,
unsigned int protoff,
- int *hotdrop)
+ bool *hotdrop)
{
- struct ipv6_rt_hdr _route, *rh;
+ struct ipv6_rt_hdr _route;
+ const struct ipv6_rt_hdr *rh;
const struct ip6t_rt *rtinfo = matchinfo;
unsigned int temp;
unsigned int ptr;
unsigned int hdrlen = 0;
- unsigned int ret = 0;
- struct in6_addr *ap, _addr;
+ bool ret = false;
+ struct in6_addr _addr;
+ const struct in6_addr *ap;
int err;
err = ipv6_find_hdr(skb, &ptr, NEXTHDR_ROUTING, NULL);
if (err < 0) {
if (err != -ENOENT)
- *hotdrop = 1;
- return 0;
+ *hotdrop = true;
+ return false;
}
rh = skb_header_pointer(skb, ptr, sizeof(_route), &_route);
if (rh == NULL) {
- *hotdrop = 1;
- return 0;
+ *hotdrop = true;
+ 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);
- DEBUGP("TYPE %04X ", rh->type);
- DEBUGP("SGS_LEFT %u %02X\n", rh->segments_left, rh->segments_left);
-
- DEBUGP("IPv6 RT segsleft %02X ",
- (segsleft_match(rtinfo->segsleft[0], rtinfo->segsleft[1],
- rh->segments_left,
- !!(rtinfo->invflags & IP6T_RT_INV_SGS))));
- DEBUGP("type %02X %02X %02X ",
- rtinfo->rt_type, rh->type,
- (!(rtinfo->flags & IP6T_RT_TYP) ||
- ((rtinfo->rt_type == rh->type) ^
- !!(rtinfo->invflags & IP6T_RT_INV_TYP))));
- DEBUGP("len %02X %04X %02X ",
- rtinfo->hdrlen, hdrlen,
- (!(rtinfo->flags & IP6T_RT_LEN) ||
- ((rtinfo->hdrlen == hdrlen) ^
- !!(rtinfo->invflags & IP6T_RT_INV_LEN))));
- DEBUGP("res %02X %02X %02X ",
- (rtinfo->flags & IP6T_RT_RES),
- ((struct rt0_hdr *)rh)->reserved,
- !((rtinfo->flags & IP6T_RT_RES) &&
- (((struct rt0_hdr *)rh)->reserved)));
+ pr_debug("IPv6 RT LEN %u %u ", hdrlen, rh->hdrlen);
+ pr_debug("TYPE %04X ", rh->type);
+ pr_debug("SGS_LEFT %u %02X\n", rh->segments_left, rh->segments_left);
+
+ pr_debug("IPv6 RT segsleft %02X ",
+ segsleft_match(rtinfo->segsleft[0], rtinfo->segsleft[1],
+ rh->segments_left,
+ !!(rtinfo->invflags & IP6T_RT_INV_SGS)));
+ pr_debug("type %02X %02X %02X ",
+ rtinfo->rt_type, rh->type,
+ (!(rtinfo->flags & IP6T_RT_TYP) ||
+ ((rtinfo->rt_type == rh->type) ^
+ !!(rtinfo->invflags & IP6T_RT_INV_TYP))));
+ pr_debug("len %02X %04X %02X ",
+ rtinfo->hdrlen, hdrlen,
+ !(rtinfo->flags & IP6T_RT_LEN) ||
+ ((rtinfo->hdrlen == hdrlen) ^
+ !!(rtinfo->invflags & IP6T_RT_INV_LEN)));
+ pr_debug("res %02X %02X %02X ",
+ rtinfo->flags & IP6T_RT_RES,
+ ((const struct rt0_hdr *)rh)->reserved,
+ !((rtinfo->flags & IP6T_RT_RES) &&
+ (((const struct rt0_hdr *)rh)->reserved)));
ret = (rh != NULL)
&&
@@ -129,18 +125,18 @@ match(const struct sk_buff *skb,
ret = (*rp == 0);
}
- DEBUGP("#%d ", rtinfo->addrnr);
+ pr_debug("#%d ", rtinfo->addrnr);
if (!(rtinfo->flags & IP6T_RT_FST)) {
return ret;
} else if (rtinfo->flags & IP6T_RT_FST_NSTRICT) {
- DEBUGP("Not strict ");
+ pr_debug("Not strict ");
if (rtinfo->addrnr > (unsigned int)((hdrlen - 8) / 16)) {
- DEBUGP("There isn't enough space\n");
- return 0;
+ pr_debug("There isn't enough space\n");
+ return false;
} else {
unsigned int i = 0;
- DEBUGP("#%d ", rtinfo->addrnr);
+ pr_debug("#%d ", rtinfo->addrnr);
for (temp = 0;
temp < (unsigned int)((hdrlen - 8) / 16);
temp++) {
@@ -154,25 +150,25 @@ match(const struct sk_buff *skb,
BUG_ON(ap == NULL);
if (ipv6_addr_equal(ap, &rtinfo->addrs[i])) {
- DEBUGP("i=%d temp=%d;\n", i, temp);
+ pr_debug("i=%d temp=%d;\n", i, temp);
i++;
}
if (i == rtinfo->addrnr)
break;
}
- DEBUGP("i=%d #%d\n", i, rtinfo->addrnr);
+ pr_debug("i=%d #%d\n", i, rtinfo->addrnr);
if (i == rtinfo->addrnr)
return ret;
else
- return 0;
+ return false;
}
} else {
- DEBUGP("Strict ");
+ pr_debug("Strict ");
if (rtinfo->addrnr > (unsigned int)((hdrlen - 8) / 16)) {
- DEBUGP("There isn't enough space\n");
- return 0;
+ pr_debug("There isn't enough space\n");
+ return false;
} else {
- DEBUGP("#%d ", rtinfo->addrnr);
+ pr_debug("#%d ", rtinfo->addrnr);
for (temp = 0; temp < rtinfo->addrnr; temp++) {
ap = skb_header_pointer(skb,
ptr
@@ -185,20 +181,20 @@ match(const struct sk_buff *skb,
if (!ipv6_addr_equal(ap, &rtinfo->addrs[temp]))
break;
}
- DEBUGP("temp=%d #%d\n", temp, rtinfo->addrnr);
- if ((temp == rtinfo->addrnr) &&
- (temp == (unsigned int)((hdrlen - 8) / 16)))
+ pr_debug("temp=%d #%d\n", temp, rtinfo->addrnr);
+ if (temp == rtinfo->addrnr &&
+ 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. */
-static int
+static bool
checkentry(const char *tablename,
const void *entry,
const struct xt_match *match,
@@ -208,21 +204,21 @@ checkentry(const char *tablename,
const struct ip6t_rt *rtinfo = matchinfo;
if (rtinfo->invflags & ~IP6T_RT_INV_MASK) {
- DEBUGP("ip6t_rt: unknown flags %X\n", rtinfo->invflags);
- return 0;
+ pr_debug("ip6t_rt: unknown flags %X\n", rtinfo->invflags);
+ return false;
}
if ((rtinfo->flags & (IP6T_RT_RES | IP6T_RT_FST_MASK)) &&
(!(rtinfo->flags & IP6T_RT_TYP) ||
(rtinfo->rt_type != 0) ||
(rtinfo->invflags & IP6T_RT_INV_TYP))) {
- DEBUGP("`--rt-type 0' required before `--rt-0-*'");
- return 0;
+ pr_debug("`--rt-type 0' required before `--rt-0-*'");
+ return false;
}
- return 1;
+ return true;
}
-static struct xt_match rt_match = {
+static struct xt_match rt_match __read_mostly = {
.name = "rt",
.family = AF_INET6,
.match = match,
generated by cgit v1.2.3 (git 2.0.4) at 2024-05-23 06:35:54 +0000