/* Arguments changed since 2.6.9, as this must now handle
non-linear skb, using skb_header_pointer and
skb_ip_make_writable. */
- 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);
+ 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);
/* Called when user tries to insert an entry of this type. */
/* Should return true or false. */
}
static inline
-int do_match(struct ipt_entry_match *m,
- const struct sk_buff *skb,
- const struct net_device *in,
- const struct net_device *out,
- int offset,
- bool *hotdrop)
+bool do_match(struct ipt_entry_match *m,
+ const struct sk_buff *skb,
+ const struct net_device *in,
+ const struct net_device *out,
+ int offset,
+ 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, ip_hdrlen(skb), hotdrop))
- return 1;
+ return true;
else
- return 0;
+ return false;
}
static inline struct ipt_entry *
}
/* Returns 1 if the type and code is matched by the range, 0 otherwise */
-static inline int
+static inline bool
icmp_type_code_match(u_int8_t test_type, u_int8_t min_code, u_int8_t max_code,
u_int8_t type, u_int8_t code,
- int invert)
+ bool invert)
{
return ((test_type == 0xFF) || (type == test_type && code >= min_code && code <= max_code))
^ invert;
}
-static int
+static bool
icmp_match(const struct sk_buff *skb,
const struct net_device *in,
const struct net_device *out,
/* Must not be a fragment. */
if (offset)
- return 0;
+ return false;
ic = skb_header_pointer(skb, protoff, sizeof(_icmph), &_icmph);
if (ic == NULL) {
*/
duprintf("Dropping evil ICMP tinygram.\n");
*hotdrop = true;
- return 0;
+ return false;
}
return icmp_type_code_match(icmpinfo->type,
MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
MODULE_DESCRIPTION("iptables addrtype match");
-static inline int match_type(__be32 addr, u_int16_t mask)
+static inline bool match_type(__be32 addr, u_int16_t mask)
{
return !!(mask & (1 << inet_addr_type(addr)));
}
-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 ipt_addrtype_info *info = matchinfo;
const struct iphdr *iph = ip_hdr(skb);
- int ret = 1;
+ bool ret = true;
if (info->source)
ret &= match_type(iph->saddr, info->source)^info->invert_source;
#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;
duprintf("ah spi_match:%c 0x%x <= 0x%x <= 0x%x",invert? '!':' ',
min,spi,max);
r=(spi >= min && spi <= max) ^ invert;
return r;
}
-static int
+static bool
match(const struct sk_buff *skb,
const struct net_device *in,
const struct net_device *out,
/* Must not be a fragment. */
if (offset)
- return 0;
+ return false;
ah = skb_header_pointer(skb, protoff,
sizeof(_ahdr), &_ahdr);
MODULE_DESCRIPTION("iptables ECN matching module");
MODULE_LICENSE("GPL");
-static inline int match_ip(const struct sk_buff *skb,
- const struct ipt_ecn_info *einfo)
+static inline bool match_ip(const struct sk_buff *skb,
+ const struct ipt_ecn_info *einfo)
{
return (ip_hdr(skb)->tos & IPT_ECN_IP_MASK) == einfo->ip_ect;
}
-static inline int match_tcp(const struct sk_buff *skb,
- const struct ipt_ecn_info *einfo,
- bool *hotdrop)
+static inline bool match_tcp(const struct sk_buff *skb,
+ const struct ipt_ecn_info *einfo,
+ bool *hotdrop)
{
struct tcphdr _tcph, *th;
th = skb_header_pointer(skb, ip_hdrlen(skb), sizeof(_tcph), &_tcph);
if (th == NULL) {
*hotdrop = false;
- return 0;
+ return false;
}
if (einfo->operation & IPT_ECN_OP_MATCH_ECE) {
if (einfo->invert & IPT_ECN_OP_MATCH_ECE) {
if (th->ece == 1)
- return 0;
+ return false;
} else {
if (th->ece == 0)
- return 0;
+ return false;
}
}
if (einfo->operation & IPT_ECN_OP_MATCH_CWR) {
if (einfo->invert & IPT_ECN_OP_MATCH_CWR) {
if (th->cwr == 1)
- return 0;
+ return false;
} else {
if (th->cwr == 0)
- return 0;
+ return false;
}
}
- return 1;
+ return true;
}
-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 ipt_ecn_info *info = matchinfo;
if (info->operation & IPT_ECN_OP_MATCH_IP)
if (!match_ip(skb, info))
- return 0;
+ return false;
if (info->operation & (IPT_ECN_OP_MATCH_ECE|IPT_ECN_OP_MATCH_CWR)) {
if (ip_hdr(skb)->protocol != IPPROTO_TCP)
- return 0;
+ return false;
if (!match_tcp(skb, info, hotdrop))
- return 0;
+ return false;
}
- return 1;
+ return true;
}
static int checkentry(const char *tablename, const void *ip_void,
#define DEBUGP(format, args...)
#endif
-static int
+static bool
match(const struct sk_buff *skb,
const struct net_device *in,
const struct net_device *out,
info->flags & IPRANGE_SRC_INV ? "(INV) " : "",
NIPQUAD(info->src.min_ip),
NIPQUAD(info->src.max_ip));
- return 0;
+ return false;
}
}
if (info->flags & IPRANGE_DST) {
info->flags & IPRANGE_DST_INV ? "(INV) " : "",
NIPQUAD(info->dst.min_ip),
NIPQUAD(info->dst.max_ip));
- return 0;
+ return false;
}
}
- return 1;
+ return true;
}
static struct xt_match iprange_match = {
MODULE_AUTHOR("Marc Boucher <marc@mbsi.ca>");
MODULE_DESCRIPTION("iptables owner match");
-static int
+static bool
match(const struct sk_buff *skb,
const struct net_device *in,
const struct net_device *out,
const struct ipt_owner_info *info = matchinfo;
if (!skb->sk || !skb->sk->sk_socket || !skb->sk->sk_socket->file)
- return 0;
+ return false;
if(info->match & IPT_OWNER_UID) {
if ((skb->sk->sk_socket->file->f_uid != info->uid) ^
!!(info->invert & IPT_OWNER_UID))
- return 0;
+ return false;
}
if(info->match & IPT_OWNER_GID) {
if ((skb->sk->sk_socket->file->f_gid != info->gid) ^
!!(info->invert & IPT_OWNER_GID))
- return 0;
+ return false;
}
- return 1;
+ return true;
}
static int
}
}
-static int
+static bool
ipt_recent_match(const struct sk_buff *skb,
const struct net_device *in, const struct net_device *out,
const struct xt_match *match, const void *matchinfo,
struct recent_entry *e;
__be32 addr;
u_int8_t ttl;
- int ret = info->invert;
+ bool ret = info->invert;
if (info->side == IPT_RECENT_DEST)
addr = ip_hdr(skb)->daddr;
e = recent_entry_init(t, addr, ttl);
if (e == NULL)
*hotdrop = true;
- ret ^= 1;
+ ret = !ret;
goto out;
}
if (info->check_set & IPT_RECENT_SET)
- ret ^= 1;
+ ret = !ret;
else if (info->check_set & IPT_RECENT_REMOVE) {
recent_entry_remove(t, e);
- ret ^= 1;
+ ret = !ret;
} else if (info->check_set & (IPT_RECENT_CHECK | IPT_RECENT_UPDATE)) {
unsigned long t = jiffies - info->seconds * HZ;
unsigned int i, hits = 0;
if (info->seconds && time_after(t, e->stamps[i]))
continue;
if (++hits >= info->hit_count) {
- ret ^= 1;
+ ret = !ret;
break;
}
}
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("iptables TOS match module");
-static int
+static bool
match(const struct sk_buff *skb,
const struct net_device *in,
const struct net_device *out,
MODULE_DESCRIPTION("IP tables TTL 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 ipt_ttl_info *info = matchinfo;
const u8 ttl = ip_hdr(skb)->ttl;
default:
printk(KERN_WARNING "ipt_ttl: unknown mode %d\n",
info->mode);
- return 0;
+ return false;
}
- return 0;
+ return false;
}
static struct xt_match ttl_match = {
}
/* 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,
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. */
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++) {
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 ... */
if (protohdr < 0) {
if (_frag_off == 0)
*hotdrop = true;
- return 0;
+ return false;
}
*fragoff = _frag_off;
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 */
}
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 *
^ invert;
}
-static int
+static bool
icmp6_match(const struct sk_buff *skb,
const struct net_device *in,
const struct net_device *out,
/* Must not be a fragment. */
if (offset)
- return 0;
+ return false;
ic = skb_header_pointer(skb, protoff, sizeof(_icmp), &_icmp);
if (ic == NULL) {
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,
#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;
return r;
}
-static int
+static bool
match(const struct sk_buff *skb,
const struct net_device *in,
const struct net_device *out,
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;
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,
(skb_mac_header(skb) + ETH_HLEN) <= skb->data) &&
offset != 0) {
*hotdrop = true;
- return 0;
+ return false;
}
memset(eui64, 0, sizeof(eui64));
i++;
if (i == 8)
- return 1;
+ return true;
}
}
- return 0;
+ return false;
}
static struct xt_match eui64_match = {
#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;
return r;
}
-static int
+static bool
match(const struct sk_buff *skb,
const struct net_device *in,
const struct net_device *out,
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);
* 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,
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;
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);
DEBUGP("Tbad %02X %02X\n",
*tp,
(optinfo->opts[temp] & 0xFF00) >> 8);
- return 0;
+ return false;
} else {
DEBUGP("Tok ");
}
if (spec_len != 0x00FF && spec_len != *lp) {
DEBUGP("Lbad %02X %04X\n", *lp,
spec_len);
- return 0;
+ return false;
}
DEBUGP("Lok ");
optlen = *lp + 2;
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. */
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);
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 = {
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,
/* 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;
temp |= MASK_DSTOPTS;
break;
default:
- return 0;
+ return false;
break;
}
#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,
/* Must not be a fragment. */
if (offset)
- return 0;
+ return false;
mh = skb_header_pointer(skb, protoff, sizeof(_mh), &_mh);
if (mh == NULL) {
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,
MODULE_LICENSE("GPL");
-static int
+static bool
match(const struct sk_buff *skb,
const struct net_device *in,
const struct net_device *out,
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
#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;
return r;
}
-static int
+static bool
match(const struct sk_buff *skb,
const struct net_device *in,
const struct net_device *out,
unsigned int temp;
unsigned int ptr;
unsigned int hdrlen = 0;
- unsigned int ret = 0;
+ bool ret = false;
struct in6_addr *ap, _addr;
int err;
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);
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;
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++) {
(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. */
MODULE_ALIAS("ipt_comment");
MODULE_ALIAS("ip6t_comment");
-static int
+static bool
match(const struct sk_buff *skb,
const struct net_device *in,
const struct net_device *out,
bool *hotdrop)
{
/* We always match */
- return 1;
+ return true;
}
static struct xt_match xt_comment_match[] = {
MODULE_DESCRIPTION("iptables match for matching number of pkts/bytes per connection");
MODULE_ALIAS("ipt_connbytes");
-static int
+static bool
match(const struct sk_buff *skb,
const struct net_device *in,
const struct net_device *out,
ct = nf_ct_get(skb, &ctinfo);
if (!ct)
- return 0;
+ return false;
counters = ct->counters;
switch (sinfo->what) {
MODULE_LICENSE("GPL");
MODULE_ALIAS("ipt_connmark");
-static int
+static bool
match(const struct sk_buff *skb,
const struct net_device *in,
const struct net_device *out,
ct = nf_ct_get(skb, &ctinfo);
if (!ct)
- return 0;
+ return false;
return (((ct->mark) & info->mask) == info->mark) ^ info->invert;
}
MODULE_DESCRIPTION("iptables connection tracking match module");
MODULE_ALIAS("ipt_conntrack");
-static int
+static bool
match(const struct sk_buff *skb,
const struct net_device *in,
const struct net_device *out,
}
if (FWINV((statebit & sinfo->statemask) == 0,
XT_CONNTRACK_STATE))
- return 0;
+ return false;
}
if (ct == NULL) {
if (sinfo->flags & ~XT_CONNTRACK_STATE)
- return 0;
- return 1;
+ return false;
+ return true;
}
if (sinfo->flags & XT_CONNTRACK_PROTO &&
FWINV(ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.protonum !=
sinfo->tuple[IP_CT_DIR_ORIGINAL].dst.protonum,
XT_CONNTRACK_PROTO))
- return 0;
+ return false;
if (sinfo->flags & XT_CONNTRACK_ORIGSRC &&
FWINV((ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.u3.ip &
sinfo->sipmsk[IP_CT_DIR_ORIGINAL].s_addr) !=
sinfo->tuple[IP_CT_DIR_ORIGINAL].src.ip,
XT_CONNTRACK_ORIGSRC))
- return 0;
+ return false;
if (sinfo->flags & XT_CONNTRACK_ORIGDST &&
FWINV((ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.u3.ip &
sinfo->dipmsk[IP_CT_DIR_ORIGINAL].s_addr) !=
sinfo->tuple[IP_CT_DIR_ORIGINAL].dst.ip,
XT_CONNTRACK_ORIGDST))
- return 0;
+ return false;
if (sinfo->flags & XT_CONNTRACK_REPLSRC &&
FWINV((ct->tuplehash[IP_CT_DIR_REPLY].tuple.src.u3.ip &
sinfo->sipmsk[IP_CT_DIR_REPLY].s_addr) !=
sinfo->tuple[IP_CT_DIR_REPLY].src.ip,
XT_CONNTRACK_REPLSRC))
- return 0;
+ return false;
if (sinfo->flags & XT_CONNTRACK_REPLDST &&
FWINV((ct->tuplehash[IP_CT_DIR_REPLY].tuple.dst.u3.ip &
sinfo->dipmsk[IP_CT_DIR_REPLY].s_addr) !=
sinfo->tuple[IP_CT_DIR_REPLY].dst.ip,
XT_CONNTRACK_REPLDST))
- return 0;
+ return false;
if (sinfo->flags & XT_CONNTRACK_STATUS &&
FWINV((ct->status & sinfo->statusmask) == 0,
XT_CONNTRACK_STATUS))
- return 0;
+ return false;
if(sinfo->flags & XT_CONNTRACK_EXPIRES) {
unsigned long expires = timer_pending(&ct->timeout) ?
if (FWINV(!(expires >= sinfo->expires_min &&
expires <= sinfo->expires_max),
XT_CONNTRACK_EXPIRES))
- return 0;
+ return false;
}
- return 1;
+ return true;
}
static int
static unsigned char *dccp_optbuf;
static DEFINE_SPINLOCK(dccp_buflock);
-static inline int
+static inline bool
dccp_find_option(u_int8_t option,
const struct sk_buff *skb,
unsigned int protoff,
if (dh->dccph_doff * 4 < __dccp_hdr_len(dh)) {
*hotdrop = true;
- return 0;
+ return false;
}
if (!optlen)
- return 0;
+ return false;
spin_lock_bh(&dccp_buflock);
op = skb_header_pointer(skb, protoff + optoff, optlen, dccp_optbuf);
/* If we don't have the whole header, drop packet. */
spin_unlock_bh(&dccp_buflock);
*hotdrop = true;
- return 0;
+ return false;
}
for (i = 0; i < optlen; ) {
if (op[i] == option) {
spin_unlock_bh(&dccp_buflock);
- return 1;
+ return true;
}
if (op[i] < 2)
}
spin_unlock_bh(&dccp_buflock);
- return 0;
+ return false;
}
-static inline int
+static inline bool
match_types(const struct dccp_hdr *dh, u_int16_t typemask)
{
return (typemask & (1 << dh->dccph_type));
}
-static inline int
+static inline bool
match_option(u_int8_t option, const struct sk_buff *skb, unsigned int protoff,
const struct dccp_hdr *dh, bool *hotdrop)
{
return dccp_find_option(option, skb, protoff, dh, hotdrop);
}
-static int
+static bool
match(const struct sk_buff *skb,
const struct net_device *in,
const struct net_device *out,
struct dccp_hdr _dh, *dh;
if (offset)
- return 0;
+ return false;
dh = skb_header_pointer(skb, protoff, sizeof(_dh), &_dh);
if (dh == NULL) {
*hotdrop = true;
- return 0;
+ return false;
}
return DCCHECK(((ntohs(dh->dccph_sport) >= info->spts[0])
MODULE_ALIAS("ipt_dscp");
MODULE_ALIAS("ip6t_dscp");
-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)
-{
- const struct xt_dscp_info *info = matchinfo;
- u_int8_t dscp = ipv4_get_dsfield(ip_hdr(skb)) >> XT_DSCP_SHIFT;
-
- return (dscp == info->dscp) ^ !!info->invert;
-}
-
-static int match6(const struct sk_buff *skb,
+static bool match(const struct sk_buff *skb,
const struct net_device *in,
const struct net_device *out,
const struct xt_match *match,
int offset,
unsigned int protoff,
bool *hotdrop)
+{
+ const struct xt_dscp_info *info = matchinfo;
+ u_int8_t dscp = ipv4_get_dsfield(ip_hdr(skb)) >> XT_DSCP_SHIFT;
+
+ return (dscp == info->dscp) ^ !!info->invert;
+}
+
+static bool match6(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 xt_dscp_info *info = matchinfo;
u_int8_t dscp = ipv6_get_dsfield(ipv6_hdr(skb)) >> XT_DSCP_SHIFT;
#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;
duprintf("esp spi_match:%c 0x%x <= 0x%x <= 0x%x", invert ? '!' : ' ',
min, spi, max);
r = (spi >= min && spi <= max) ^ invert;
return r;
}
-static int
+static bool
match(const struct sk_buff *skb,
const struct net_device *in,
const struct net_device *out,
/* Must not be a fragment. */
if (offset)
- return 0;
+ return false;
eh = skb_header_pointer(skb, protoff, sizeof(_esp), &_esp);
if (eh == NULL) {
*/
duprintf("Dropping evil ESP tinygram.\n");
*hotdrop = true;
- return 0;
+ return false;
}
return spi_match(espinfo->spis[0], espinfo->spis[1], ntohl(eh->spi),
static HLIST_HEAD(hashlimit_htables);
static struct kmem_cache *hashlimit_cachep __read_mostly;
-static inline int dst_cmp(const struct dsthash_ent *ent, struct dsthash_dst *b)
+static inline bool dst_cmp(const struct dsthash_ent *ent,
+ struct dsthash_dst *b)
{
return !memcmp(&ent->dst, b, sizeof(ent->dst));
}
return 0;
}
-static int select_all(struct xt_hashlimit_htable *ht, struct dsthash_ent *he)
+static bool select_all(struct xt_hashlimit_htable *ht, struct dsthash_ent *he)
{
return 1;
}
-static int select_gc(struct xt_hashlimit_htable *ht, struct dsthash_ent *he)
+static bool select_gc(struct xt_hashlimit_htable *ht, struct dsthash_ent *he)
{
return (jiffies >= he->expires);
}
static void htable_selective_cleanup(struct xt_hashlimit_htable *ht,
- int (*select)(struct xt_hashlimit_htable *ht,
+ bool (*select)(struct xt_hashlimit_htable *ht,
struct dsthash_ent *he))
{
unsigned int i;
return 0;
}
-static int
+static bool
hashlimit_match(const struct sk_buff *skb,
const struct net_device *in,
const struct net_device *out,
/* We're underlimit. */
dh->rateinfo.credit -= dh->rateinfo.cost;
spin_unlock_bh(&hinfo->lock);
- return 1;
+ return true;
}
spin_unlock_bh(&hinfo->lock);
/* default case: we're overlimit, thus don't match */
- return 0;
+ return false;
hotdrop:
*hotdrop = true;
- return 0;
+ return false;
}
static int
#define DEBUGP(format, args...)
#endif
-static int
+static bool
match(const struct sk_buff *skb,
const struct net_device *in,
const struct net_device *out,
struct nf_conn *ct;
struct nf_conn_help *master_help;
enum ip_conntrack_info ctinfo;
- int ret = info->invert;
+ bool ret = info->invert;
ct = nf_ct_get((struct sk_buff *)skb, &ctinfo);
if (!ct) {
ct->master->helper->name, info->name);
if (info->name[0] == '\0')
- ret ^= 1;
+ ret = !ret;
else
ret ^= !strncmp(master_help->helper->name, info->name,
strlen(master_help->helper->name));
MODULE_ALIAS("ipt_length");
MODULE_ALIAS("ip6t_length");
-static int
+static bool
match(const struct sk_buff *skb,
const struct net_device *in,
const struct net_device *out,
return (pktlen >= info->min && pktlen <= info->max) ^ info->invert;
}
-static int
+static bool
match6(const struct sk_buff *skb,
const struct net_device *in,
const struct net_device *out,
#define CREDITS_PER_JIFFY POW2_BELOW32(MAX_CPJ)
-static int
+static bool
ipt_limit_match(const struct sk_buff *skb,
const struct net_device *in,
const struct net_device *out,
/* We're not limited. */
r->credit -= r->cost;
spin_unlock_bh(&limit_lock);
- return 1;
+ return true;
}
spin_unlock_bh(&limit_lock);
- return 0;
+ return false;
}
/* Precision saver. */
MODULE_ALIAS("ipt_mac");
MODULE_ALIAS("ip6t_mac");
-static int
+static bool
match(const struct sk_buff *skb,
const struct net_device *in,
const struct net_device *out,
MODULE_ALIAS("ipt_mark");
MODULE_ALIAS("ip6t_mark");
-static int
+static bool
match(const struct sk_buff *skb,
const struct net_device *in,
const struct net_device *out,
#endif
/* Returns 1 if the port is matched by the test, 0 otherwise. */
-static inline int
+static inline bool
ports_match(const u_int16_t *portlist, enum xt_multiport_flags flags,
u_int8_t count, u_int16_t src, u_int16_t dst)
{
unsigned int i;
for (i = 0; i < count; i++) {
if (flags != XT_MULTIPORT_DESTINATION && portlist[i] == src)
- return 1;
+ return true;
if (flags != XT_MULTIPORT_SOURCE && portlist[i] == dst)
- return 1;
+ return true;
}
- return 0;
+ return false;
}
/* Returns 1 if the port is matched by the test, 0 otherwise. */
-static inline int
+static inline bool
ports_match_v1(const struct xt_multiport_v1 *minfo,
u_int16_t src, u_int16_t dst)
{
if (minfo->flags == XT_MULTIPORT_SOURCE
&& src >= s && src <= e)
- return 1 ^ minfo->invert;
+ return true ^ minfo->invert;
if (minfo->flags == XT_MULTIPORT_DESTINATION
&& dst >= s && dst <= e)
- return 1 ^ minfo->invert;
+ return true ^ minfo->invert;
if (minfo->flags == XT_MULTIPORT_EITHER
&& ((dst >= s && dst <= e)
|| (src >= s && src <= e)))
- return 1 ^ minfo->invert;
+ return true ^ minfo->invert;
} else {
/* exact port matching */
duprintf("src or dst matches with %d?\n", s);
if (minfo->flags == XT_MULTIPORT_SOURCE
&& src == s)
- return 1 ^ minfo->invert;
+ return true ^ minfo->invert;
if (minfo->flags == XT_MULTIPORT_DESTINATION
&& dst == s)
- return 1 ^ minfo->invert;
+ return true ^ minfo->invert;
if (minfo->flags == XT_MULTIPORT_EITHER
&& (src == s || dst == s))
- return 1 ^ minfo->invert;
+ return true ^ minfo->invert;
}
}
return minfo->invert;
}
-static int
+static bool
match(const struct sk_buff *skb,
const struct net_device *in,
const struct net_device *out,
const struct xt_multiport *multiinfo = matchinfo;
if (offset)
- return 0;
+ return false;
pptr = skb_header_pointer(skb, protoff, sizeof(_ports), _ports);
if (pptr == NULL) {
*/
duprintf("xt_multiport: Dropping evil offset=0 tinygram.\n");
*hotdrop = true;
- return 0;
+ return false;
}
return ports_match(multiinfo->ports,
ntohs(pptr[0]), ntohs(pptr[1]));
}
-static int
+static bool
match_v1(const struct sk_buff *skb,
const struct net_device *in,
const struct net_device *out,
const struct xt_multiport_v1 *multiinfo = matchinfo;
if (offset)
- return 0;
+ return false;
pptr = skb_header_pointer(skb, protoff, sizeof(_ports), _ports);
if (pptr == NULL) {
*/
duprintf("xt_multiport: Dropping evil offset=0 tinygram.\n");
*hotdrop = true;
- return 0;
+ return false;
}
return ports_match_v1(multiinfo, ntohs(pptr[0]), ntohs(pptr[1]));
#include <linux/netfilter/xt_physdev.h>
#include <linux/netfilter/x_tables.h>
#include <linux/netfilter_bridge.h>
-#define MATCH 1
-#define NOMATCH 0
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Bart De Schuymer <bdschuym@pandora.be>");
MODULE_ALIAS("ipt_physdev");
MODULE_ALIAS("ip6t_physdev");
-static int
+static bool
match(const struct sk_buff *skb,
const struct net_device *in,
const struct net_device *out,
int i;
static const char nulldevname[IFNAMSIZ];
const struct xt_physdev_info *info = matchinfo;
- unsigned int ret;
+ bool ret;
const char *indev, *outdev;
struct nf_bridge_info *nf_bridge;
/* Return MATCH if the invert flags of the used options are on */
if ((info->bitmask & XT_PHYSDEV_OP_BRIDGED) &&
!(info->invert & XT_PHYSDEV_OP_BRIDGED))
- return NOMATCH;
+ return false;
if ((info->bitmask & XT_PHYSDEV_OP_ISIN) &&
!(info->invert & XT_PHYSDEV_OP_ISIN))
- return NOMATCH;
+ return false;
if ((info->bitmask & XT_PHYSDEV_OP_ISOUT) &&
!(info->invert & XT_PHYSDEV_OP_ISOUT))
- return NOMATCH;
+ return false;
if ((info->bitmask & XT_PHYSDEV_OP_IN) &&
!(info->invert & XT_PHYSDEV_OP_IN))
- return NOMATCH;
+ return false;
if ((info->bitmask & XT_PHYSDEV_OP_OUT) &&
!(info->invert & XT_PHYSDEV_OP_OUT))
- return NOMATCH;
- return MATCH;
+ return false;
+ return true;
}
/* This only makes sense in the FORWARD and POSTROUTING chains */
if ((info->bitmask & XT_PHYSDEV_OP_BRIDGED) &&
(!!(nf_bridge->mask & BRNF_BRIDGED) ^
!(info->invert & XT_PHYSDEV_OP_BRIDGED)))
- return NOMATCH;
+ return false;
if ((info->bitmask & XT_PHYSDEV_OP_ISIN &&
(!nf_bridge->physindev ^ !!(info->invert & XT_PHYSDEV_OP_ISIN))) ||
(info->bitmask & XT_PHYSDEV_OP_ISOUT &&
(!nf_bridge->physoutdev ^ !!(info->invert & XT_PHYSDEV_OP_ISOUT))))
- return NOMATCH;
+ return false;
if (!(info->bitmask & XT_PHYSDEV_OP_IN))
goto match_outdev;
indev = nf_bridge->physindev ? nf_bridge->physindev->name : nulldevname;
- for (i = 0, ret = 0; i < IFNAMSIZ/sizeof(unsigned int); i++) {
+ for (i = 0, ret = false; i < IFNAMSIZ/sizeof(unsigned int); i++) {
ret |= (((const unsigned int *)indev)[i]
^ ((const unsigned int *)info->physindev)[i])
& ((const unsigned int *)info->in_mask)[i];
}
- if ((ret == 0) ^ !(info->invert & XT_PHYSDEV_OP_IN))
- return NOMATCH;
+ if (!ret ^ !(info->invert & XT_PHYSDEV_OP_IN))
+ return false;
match_outdev:
if (!(info->bitmask & XT_PHYSDEV_OP_OUT))
- return MATCH;
+ return true;
outdev = nf_bridge->physoutdev ?
nf_bridge->physoutdev->name : nulldevname;
- for (i = 0, ret = 0; i < IFNAMSIZ/sizeof(unsigned int); i++) {
+ for (i = 0, ret = false; i < IFNAMSIZ/sizeof(unsigned int); i++) {
ret |= (((const unsigned int *)outdev)[i]
^ ((const unsigned int *)info->physoutdev)[i])
& ((const unsigned int *)info->out_mask)[i];
}
- return (ret != 0) ^ !(info->invert & XT_PHYSDEV_OP_OUT);
+ return ret ^ !(info->invert & XT_PHYSDEV_OP_OUT);
}
static int
MODULE_ALIAS("ipt_pkttype");
MODULE_ALIAS("ip6t_pkttype");
-static int match(const struct sk_buff *skb,
+static bool match(const struct sk_buff *skb,
const struct net_device *in,
const struct net_device *out,
const struct xt_match *match,
MODULE_DESCRIPTION("Xtables IPsec policy matching module");
MODULE_LICENSE("GPL");
-static inline int
+static inline bool
xt_addr_cmp(const union xt_policy_addr *a1, const union xt_policy_addr *m,
const union xt_policy_addr *a2, unsigned short family)
{
case AF_INET6:
return !ipv6_masked_addr_cmp(&a1->a6, &m->a6, &a2->a6);
}
- return 0;
+ return false;
}
-static inline int
+static inline bool
match_xfrm_state(struct xfrm_state *x, const struct xt_policy_elem *e,
unsigned short family)
{
return strict ? i == info->len : 0;
}
-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 xt_policy_info *info = matchinfo;
int ret;
ret = match_policy_out(skb, info, match->family);
if (ret < 0)
- ret = info->flags & XT_POLICY_MATCH_NONE ? 1 : 0;
+ ret = info->flags & XT_POLICY_MATCH_NONE ? true : false;
else if (info->flags & XT_POLICY_MATCH_NONE)
- ret = 0;
+ ret = false;
return ret;
}
static DEFINE_SPINLOCK(quota_lock);
-static int
+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)
{
struct xt_quota_info *q = ((struct xt_quota_info *)matchinfo)->master;
- int ret = q->flags & XT_QUOTA_INVERT ? 1 : 0;
+ bool ret = q->flags & XT_QUOTA_INVERT;
spin_lock_bh("a_lock);
if (q->quota >= skb->len) {
q->quota -= skb->len;
- ret ^= 1;
+ ret = !ret;
} else {
/* we do not allow even small packets from now on */
q->quota = 0;
MODULE_DESCRIPTION("X_tables realm match");
MODULE_ALIAS("ipt_realm");
-static int
+static bool
match(const struct sk_buff *skb,
const struct net_device *in,
const struct net_device *out,
#define SCCHECK(cond, option, flag, invflag) (!((flag) & (option)) \
|| (!!((invflag) & (option)) ^ (cond)))
-static int
+static bool
match_flags(const struct xt_sctp_flag_info *flag_info,
const int flag_count,
u_int8_t chunktype,
}
}
- return 1;
+ return true;
}
-static inline int
+static inline bool
match_packet(const struct sk_buff *skb,
unsigned int offset,
const u_int32_t *chunkmap,
if (sch == NULL || sch->length == 0) {
duprintf("Dropping invalid SCTP packet.\n");
*hotdrop = true;
- return 0;
+ return false;
}
duprintf("Chunk num: %d\toffset: %d\ttype: %d\tlength: %d\tflags: %x\n",
case SCTP_CHUNK_MATCH_ANY:
if (match_flags(flag_info, flag_count,
sch->type, sch->flags)) {
- return 1;
+ return true;
}
break;
case SCTP_CHUNK_MATCH_ONLY:
if (!match_flags(flag_info, flag_count,
sch->type, sch->flags)) {
- return 0;
+ return false;
}
break;
}
} else {
switch (chunk_match_type) {
case SCTP_CHUNK_MATCH_ONLY:
- return 0;
+ return false;
}
}
} while (offset < skb->len);
case SCTP_CHUNK_MATCH_ALL:
return SCTP_CHUNKMAP_IS_CLEAR(chunkmap);
case SCTP_CHUNK_MATCH_ANY:
- return 0;
+ return false;
case SCTP_CHUNK_MATCH_ONLY:
- return 1;
+ return true;
}
/* This will never be reached, but required to stop compiler whine */
- return 0;
+ return false;
}
-static int
+static bool
match(const struct sk_buff *skb,
const struct net_device *in,
const struct net_device *out,
if (offset) {
duprintf("Dropping non-first fragment.. FIXME\n");
- return 0;
+ return false;
}
sh = skb_header_pointer(skb, protoff, sizeof(_sh), &_sh);
if (sh == NULL) {
duprintf("Dropping evil TCP offset=0 tinygram.\n");
*hotdrop = true;
- return 0;
+ return false;
}
duprintf("spt: %d\tdpt: %d\n", ntohs(sh->source), ntohs(sh->dest));
MODULE_ALIAS("ipt_state");
MODULE_ALIAS("ip6t_state");
-static int
+static bool
match(const struct sk_buff *skb,
const struct net_device *in,
const struct net_device *out,
static DEFINE_SPINLOCK(nth_lock);
-static int
+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)
{
struct xt_statistic_info *info = (struct xt_statistic_info *)matchinfo;
- int ret = info->flags & XT_STATISTIC_INVERT ? 1 : 0;
+ bool ret = info->flags & XT_STATISTIC_INVERT;
switch (info->mode) {
case XT_STATISTIC_MODE_RANDOM:
if ((net_random() & 0x7FFFFFFF) < info->u.random.probability)
- ret ^= 1;
+ ret = !ret;
break;
case XT_STATISTIC_MODE_NTH:
info = info->master;
spin_lock_bh(&nth_lock);
if (info->u.nth.count++ == info->u.nth.every) {
info->u.nth.count = 0;
- ret ^= 1;
+ ret = !ret;
}
spin_unlock_bh(&nth_lock);
break;
MODULE_ALIAS("ipt_string");
MODULE_ALIAS("ip6t_string");
-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 xt_string_info *conf = matchinfo;
struct ts_state state;
MODULE_DESCRIPTION("iptables TCP MSS match module");
MODULE_ALIAS("ipt_tcpmss");
-static int
+static bool
match(const struct sk_buff *skb,
const struct net_device *in,
const struct net_device *out,
dropit:
*hotdrop = true;
- return 0;
+ return false;
}
static struct xt_match xt_tcpmss_match[] = {
/* 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 */
optlen, _opt);
if (op == NULL) {
*hotdrop = true;
- return 0;
+ return false;
}
for (i = 0; i < optlen; ) {
return invert;
}
-static int
+static bool
tcp_match(const struct sk_buff *skb,
const struct net_device *in,
const struct net_device *out,
*hotdrop = true;
}
/* Must not be a fragment. */
- return 0;
+ return false;
}
#define FWINVTCP(bool,invflg) ((bool) ^ !!(tcpinfo->invflags & invflg))
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. */
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,
/* Must not be a fragment. */
if (offset)
- return 0;
+ return false;
uh = skb_header_pointer(skb, protoff, sizeof(_udph), &_udph);
if (uh == NULL) {
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],
projects / linux-2.6 / commitdiff