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authorHarvey Harrison <harvey.harrison@gmail.com>2009-03-28 15:38:30 +0000
committerDavid S. Miller <davem@davemloft.net>2009-03-28 23:55:57 -0700
commitf940964901aa69e28ce729d7614061d014184472 (patch)
tree4f52de427646cbff6803e4aefd68db337632d67a
parent3e8af307bfe3b6318a1aaaf8ce18d0af7ddf2ea2 (diff)
downloadop-kernel-dev-f940964901aa69e28ce729d7614061d014184472.zip
op-kernel-dev-f940964901aa69e28ce729d7614061d014184472.tar.gz
netfilter: fix endian bug in conntrack printks
dcc_ip is treated as a host-endian value in the first printk, but the second printk uses %pI4 which expects a be32. This will cause a mismatch between the debug statement and the warning statement. Treat as a be32 throughout and avoid some byteswapping during some comparisions, and allow another user of HIPQUAD to bite the dust. Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--net/netfilter/nf_conntrack_irc.c15
1 files changed, 8 insertions, 7 deletions
diff --git a/net/netfilter/nf_conntrack_irc.c b/net/netfilter/nf_conntrack_irc.c
index 409c8be..8bd98c8 100644
--- a/net/netfilter/nf_conntrack_irc.c
+++ b/net/netfilter/nf_conntrack_irc.c
@@ -66,7 +66,7 @@ static const char *const dccprotos[] = {
* ad_beg_p returns pointer to first byte of addr data
* ad_end_p returns pointer to last byte of addr data
*/
-static int parse_dcc(char *data, const char *data_end, u_int32_t *ip,
+static int parse_dcc(char *data, const char *data_end, __be32 *ip,
u_int16_t *port, char **ad_beg_p, char **ad_end_p)
{
char *tmp;
@@ -85,7 +85,7 @@ static int parse_dcc(char *data, const char *data_end, u_int32_t *ip,
return -1;
*ad_beg_p = data;
- *ip = simple_strtoul(data, &data, 10);
+ *ip = cpu_to_be32(simple_strtoul(data, &data, 10));
/* skip blanks between ip and port */
while (*data == ' ') {
@@ -112,7 +112,7 @@ static int help(struct sk_buff *skb, unsigned int protoff,
int dir = CTINFO2DIR(ctinfo);
struct nf_conntrack_expect *exp;
struct nf_conntrack_tuple *tuple;
- u_int32_t dcc_ip;
+ __be32 dcc_ip;
u_int16_t dcc_port;
__be16 port;
int i, ret = NF_ACCEPT;
@@ -177,13 +177,14 @@ static int help(struct sk_buff *skb, unsigned int protoff,
pr_debug("unable to parse dcc command\n");
continue;
}
- pr_debug("DCC bound ip/port: %u.%u.%u.%u:%u\n",
- HIPQUAD(dcc_ip), dcc_port);
+
+ pr_debug("DCC bound ip/port: %pI4:%u\n",
+ &dcc_ip, dcc_port);
/* dcc_ip can be the internal OR external (NAT'ed) IP */
tuple = &ct->tuplehash[dir].tuple;
- if (tuple->src.u3.ip != htonl(dcc_ip) &&
- tuple->dst.u3.ip != htonl(dcc_ip)) {
+ if (tuple->src.u3.ip != dcc_ip &&
+ tuple->dst.u3.ip != dcc_ip) {
if (net_ratelimit())
printk(KERN_WARNING
"Forged DCC command from %pI4: %pI4:%u\n",
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