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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>
This commit is contained in:
Harvey Harrison 2009-03-28 15:38:30 +00:00 committed by David S. Miller
parent 3e8af307bf
commit f940964901
1 changed files with 8 additions and 7 deletions
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15
net/netfilter/nf_conntrack_irc.c
View File

@ -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",