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[NETFILTER]: nf_conntrack_sip: remove redundant function arguments

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The conntrack reference and ctinfo can be derived from the packet.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Patrick McHardy 2008-03-25 20:17:13 -07:00 committed by David S. Miller
parent 2a6cfb22ae
commit 212440a7d0
3 changed files with 37 additions and 43 deletions
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7
include/linux/netfilter/nf_conntrack_sip.h
View File

@ -22,15 +22,12 @@ enum sip_header_pos {
};
extern unsigned int (*nf_nat_sip_hook)(struct sk_buff *skb,
enum ip_conntrack_info ctinfo,
struct nf_conn *ct,
const char **dptr,
unsigned int *datalen);
extern unsigned int (*nf_nat_sdp_hook)(struct sk_buff *skb,
enum ip_conntrack_info ctinfo,
struct nf_conntrack_expect *exp,
const char **dptr,
unsigned int *datalen);
unsigned int *datalen,
struct nf_conntrack_expect *exp);
extern int ct_sip_get_info(const struct nf_conn *ct, const char *dptr,
size_t dlen, unsigned int *matchoff,

49
net/ipv4/netfilter/nf_nat_sip.c
View File

@ -78,11 +78,12 @@ static unsigned int mangle_packet(struct sk_buff *skb,
return 1;
}
static int map_sip_addr(struct sk_buff *skb, enum ip_conntrack_info ctinfo,
struct nf_conn *ct,
static int map_sip_addr(struct sk_buff *skb,
const char **dptr, unsigned int *datalen,
enum sip_header_pos pos, struct addr_map *map)
{
enum ip_conntrack_info ctinfo;
struct nf_conn *ct = nf_ct_get(skb, &ctinfo);
enum ip_conntrack_dir dir = CTINFO2DIR(ctinfo);
unsigned int matchlen, matchoff, addrlen;
char *addr;
@ -109,10 +110,10 @@ static int map_sip_addr(struct sk_buff *skb, enum ip_conntrack_info ctinfo,
}
static unsigned int ip_nat_sip(struct sk_buff *skb,
enum ip_conntrack_info ctinfo,
struct nf_conn *ct,
const char **dptr, unsigned int *datalen)
{
enum ip_conntrack_info ctinfo;
struct nf_conn *ct = nf_ct_get(skb, &ctinfo);
enum sip_header_pos pos;
struct addr_map map;
@ -134,25 +135,25 @@ static unsigned int ip_nat_sip(struct sk_buff *skb,
else
pos = POS_REQ_URI;
if (!map_sip_addr(skb, ctinfo, ct, dptr, datalen, pos, &map))
if (!map_sip_addr(skb, dptr, datalen, pos, &map))
return NF_DROP;
}
if (!map_sip_addr(skb, ctinfo, ct, dptr, datalen, POS_FROM, &map) ||
!map_sip_addr(skb, ctinfo, ct, dptr, datalen, POS_TO, &map) ||
!map_sip_addr(skb, ctinfo, ct, dptr, datalen, POS_VIA, &map) ||
!map_sip_addr(skb, ctinfo, ct, dptr, datalen, POS_CONTACT, &map))
if (!map_sip_addr(skb, dptr, datalen, POS_FROM, &map) ||
!map_sip_addr(skb, dptr, datalen, POS_TO, &map) ||
!map_sip_addr(skb, dptr, datalen, POS_VIA, &map) ||
!map_sip_addr(skb, dptr, datalen, POS_CONTACT, &map))
return NF_DROP;
return NF_ACCEPT;
}
static unsigned int mangle_sip_packet(struct sk_buff *skb,
enum ip_conntrack_info ctinfo,
struct nf_conn *ct,
const char **dptr, unsigned int *datalen,
char *buffer, int bufflen,
enum sip_header_pos pos)
{
enum ip_conntrack_info ctinfo;
struct nf_conn *ct = nf_ct_get(skb, &ctinfo);
unsigned int matchlen, matchoff;
if (ct_sip_get_info(ct, *dptr, *datalen, &matchoff, &matchlen,
@ -164,10 +165,10 @@ static unsigned int mangle_sip_packet(struct sk_buff *skb,
}
static int mangle_content_len(struct sk_buff *skb,
enum ip_conntrack_info ctinfo,
struct nf_conn *ct,
const char **dptr, unsigned int *datalen)
{
enum ip_conntrack_info ctinfo;
struct nf_conn *ct = nf_ct_get(skb, &ctinfo);
unsigned int matchoff, matchlen;
char buffer[sizeof("65536")];
int bufflen;
@ -204,21 +205,21 @@ static unsigned int mangle_sdp(struct sk_buff *skb,
/* Mangle owner and contact info. */
bufflen = sprintf(buffer, "%u.%u.%u.%u", NIPQUAD(newip));
if (!mangle_sip_packet(skb, ctinfo, ct, dptr, datalen,
buffer, bufflen, POS_OWNER_IP4))
if (!mangle_sip_packet(skb, dptr, datalen, buffer, bufflen,
POS_OWNER_IP4))
return 0;
if (!mangle_sip_packet(skb, ctinfo, ct, dptr, datalen,
buffer, bufflen, POS_CONNECTION_IP4))
if (!mangle_sip_packet(skb, dptr, datalen, buffer, bufflen,
POS_CONNECTION_IP4))
return 0;
/* Mangle media port. */
bufflen = sprintf(buffer, "%u", port);
if (!mangle_sip_packet(skb, ctinfo, ct, dptr, datalen,
buffer, bufflen, POS_MEDIA))
if (!mangle_sip_packet(skb, dptr, datalen, buffer, bufflen,
POS_MEDIA))
return 0;
return mangle_content_len(skb, ctinfo, ct, dptr, datalen);
return mangle_content_len(skb, dptr, datalen);
}
static void ip_nat_sdp_expect(struct nf_conn *ct,
@ -245,11 +246,11 @@ static void ip_nat_sdp_expect(struct nf_conn *ct,
/* So, this packet has hit the connection tracking matching code.
Mangle it, and change the expectation to match the new version. */
static unsigned int ip_nat_sdp(struct sk_buff *skb,
enum ip_conntrack_info ctinfo,
struct nf_conntrack_expect *exp,
const char **dptr, unsigned int *datalen)
const char **dptr, unsigned int *datalen,
struct nf_conntrack_expect *exp)
{
struct nf_conn *ct = exp->master;
enum ip_conntrack_info ctinfo;
struct nf_conn *ct = nf_ct_get(skb, &ctinfo);
enum ip_conntrack_dir dir = CTINFO2DIR(ctinfo);
__be32 newip;
u_int16_t port;

24
net/netfilter/nf_conntrack_sip.c
View File

@ -37,17 +37,14 @@ module_param(sip_timeout, uint, 0600);
MODULE_PARM_DESC(sip_timeout, "timeout for the master SIP session");
unsigned int (*nf_nat_sip_hook)(struct sk_buff *skb,
enum ip_conntrack_info ctinfo,
struct nf_conn *ct,
const char **dptr,
unsigned int *datalen) __read_mostly;
EXPORT_SYMBOL_GPL(nf_nat_sip_hook);
unsigned int (*nf_nat_sdp_hook)(struct sk_buff *skb,
enum ip_conntrack_info ctinfo,
struct nf_conntrack_expect *exp,
const char **dptr,
unsigned int *datalen) __read_mostly;
unsigned int *datalen,
struct nf_conntrack_expect *exp) __read_mostly;
EXPORT_SYMBOL_GPL(nf_nat_sdp_hook);
static int digits_len(const struct nf_conn *, const char *, const char *, int *);
@ -367,13 +364,12 @@ int ct_sip_get_info(const struct nf_conn *ct,
EXPORT_SYMBOL_GPL(ct_sip_get_info);
static int set_expected_rtp(struct sk_buff *skb,
struct nf_conn *ct,
enum ip_conntrack_info ctinfo,
union nf_inet_addr *addr,
__be16 port,
const char **dptr, unsigned int *datalen)
const char **dptr, unsigned int *datalen,
union nf_inet_addr *addr, __be16 port)
{
struct nf_conntrack_expect *exp;
enum ip_conntrack_info ctinfo;
struct nf_conn *ct = nf_ct_get(skb, &ctinfo);
enum ip_conntrack_dir dir = CTINFO2DIR(ctinfo);
int family = ct->tuplehash[!dir].tuple.src.l3num;
int ret;
@ -388,7 +384,7 @@ static int set_expected_rtp(struct sk_buff *skb,
nf_nat_sdp = rcu_dereference(nf_nat_sdp_hook);
if (nf_nat_sdp && ct->status & IPS_NAT_MASK)
ret = nf_nat_sdp(skb, ctinfo, exp, dptr, datalen);
ret = nf_nat_sdp(skb, dptr, datalen, exp);
else {
if (nf_ct_expect_related(exp) != 0)
ret = NF_DROP;
@ -431,7 +427,7 @@ static int sip_help(struct sk_buff *skb,
nf_nat_sip = rcu_dereference(nf_nat_sip_hook);
if (nf_nat_sip && ct->status & IPS_NAT_MASK) {
if (!nf_nat_sip(skb, ctinfo, ct, &dptr, &datalen)) {
if (!nf_nat_sip(skb, &dptr, &datalen)) {
ret = NF_DROP;
goto out;
}
@ -467,8 +463,8 @@ static int sip_help(struct sk_buff *skb,
ret = NF_DROP;
goto out;
}
ret = set_expected_rtp(skb, ct, ctinfo, &addr,
htons(port), &dptr, &datalen);
ret = set_expected_rtp(skb, &dptr, &datalen,
&addr, htons(port));
}
}
out: