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[NETFILTER]: nf_conntrack_h323: constify and annotate H.323 helper

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Constify data tables (predominantly in nf_conntrack_h323_types.c, but
also a few in nf_conntrack_h323_asn1.c) and use const qualifiers on
variables where possible in the h323 sources.

Signed-off-by: Jan Engelhardt <jengelh@computergmbh.de>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jan Engelhardt 2008-01-31 04:50:05 -08:00 committed by David S. Miller
parent 3cb609d57c
commit 905e3e8ec5
4 changed files with 230 additions and 216 deletions
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5
net/ipv4/netfilter/nf_nat_h323.c
View file

@ -32,7 +32,8 @@ static int set_addr(struct sk_buff *skb,
__be32 ip;
__be16 port;
} __attribute__ ((__packed__)) buf;
struct tcphdr _tcph, *th;
const struct tcphdr *th;
struct tcphdr _tcph;
buf.ip = ip;
buf.port = port;
@ -99,7 +100,7 @@ static int set_sig_addr(struct sk_buff *skb, struct nf_conn *ct,
unsigned char **data,
TransportAddress *taddr, int count)
{
struct nf_ct_h323_master *info = &nfct_help(ct)->help.ct_h323_info;
const struct nf_ct_h323_master *info = &nfct_help(ct)->help.ct_h323_info;
int dir = CTINFO2DIR(ctinfo);
int i;
__be16 port;

76
net/netfilter/nf_conntrack_h323_asn1.c
View file

@ -87,7 +87,7 @@ typedef struct field_t {
unsigned char ub;
unsigned short attr;
unsigned short offset;
struct field_t *fields;
const struct field_t *fields;
} field_t;
/* Bit Stream */
@ -111,21 +111,21 @@ static unsigned int get_bitmap(bitstr_t *bs, unsigned int b);
static unsigned int get_uint(bitstr_t *bs, int b);
/* Decoder Functions */
static int decode_nul(bitstr_t *bs, field_t *f, char *base, int level);
static int decode_bool(bitstr_t *bs, field_t *f, char *base, int level);
static int decode_oid(bitstr_t *bs, field_t *f, char *base, int level);
static int decode_int(bitstr_t *bs, field_t *f, char *base, int level);
static int decode_enum(bitstr_t *bs, field_t *f, char *base, int level);
static int decode_bitstr(bitstr_t *bs, field_t *f, char *base, int level);
static int decode_numstr(bitstr_t *bs, field_t *f, char *base, int level);
static int decode_octstr(bitstr_t *bs, field_t *f, char *base, int level);
static int decode_bmpstr(bitstr_t *bs, field_t *f, char *base, int level);
static int decode_seq(bitstr_t *bs, field_t *f, char *base, int level);
static int decode_seqof(bitstr_t *bs, field_t *f, char *base, int level);
static int decode_choice(bitstr_t *bs, field_t *f, char *base, int level);
static int decode_nul(bitstr_t *bs, const struct field_t *f, char *base, int level);
static int decode_bool(bitstr_t *bs, const struct field_t *f, char *base, int level);
static int decode_oid(bitstr_t *bs, const struct field_t *f, char *base, int level);
static int decode_int(bitstr_t *bs, const struct field_t *f, char *base, int level);
static int decode_enum(bitstr_t *bs, const struct field_t *f, char *base, int level);
static int decode_bitstr(bitstr_t *bs, const struct field_t *f, char *base, int level);
static int decode_numstr(bitstr_t *bs, const struct field_t *f, char *base, int level);
static int decode_octstr(bitstr_t *bs, const struct field_t *f, char *base, int level);
static int decode_bmpstr(bitstr_t *bs, const struct field_t *f, char *base, int level);
static int decode_seq(bitstr_t *bs, const struct field_t *f, char *base, int level);
static int decode_seqof(bitstr_t *bs, const struct field_t *f, char *base, int level);
static int decode_choice(bitstr_t *bs, const struct field_t *f, char *base, int level);
/* Decoder Functions Vector */
typedef int (*decoder_t)(bitstr_t *, field_t *, char *, int);
typedef int (*decoder_t)(bitstr_t *, const struct field_t *, char *, int);
static const decoder_t Decoders[] = {
decode_nul,
decode_bool,
@ -264,7 +264,8 @@ static unsigned int get_uint(bitstr_t *bs, int b)
}
/****************************************************************************/
static int decode_nul(bitstr_t *bs, field_t *f, char *base, int level)
static int decode_nul(bitstr_t *bs, const struct field_t *f,
char *base, int level)
{
PRINT("%*.s%s\n", level * TAB_SIZE, " ", f->name);
@ -272,7 +273,8 @@ static int decode_nul(bitstr_t *bs, field_t *f, char *base, int level)
}
/****************************************************************************/
static int decode_bool(bitstr_t *bs, field_t *f, char *base, int level)
static int decode_bool(bitstr_t *bs, const struct field_t *f,
char *base, int level)
{
PRINT("%*.s%s\n", level * TAB_SIZE, " ", f->name);
@ -283,7 +285,8 @@ static int decode_bool(bitstr_t *bs, field_t *f, char *base, int level)
}
/****************************************************************************/
static int decode_oid(bitstr_t *bs, field_t *f, char *base, int level)
static int decode_oid(bitstr_t *bs, const struct field_t *f,
char *base, int level)
{
int len;
@ -299,7 +302,8 @@ static int decode_oid(bitstr_t *bs, field_t *f, char *base, int level)
}
/****************************************************************************/
static int decode_int(bitstr_t *bs, field_t *f, char *base, int level)
static int decode_int(bitstr_t *bs, const struct field_t *f,
char *base, int level)
{
unsigned int len;
@ -342,7 +346,8 @@ static int decode_int(bitstr_t *bs, field_t *f, char *base, int level)
}
/****************************************************************************/
static int decode_enum(bitstr_t *bs, field_t *f, char *base, int level)
static int decode_enum(bitstr_t *bs, const struct field_t *f,
char *base, int level)
{
PRINT("%*.s%s\n", level * TAB_SIZE, " ", f->name);
@ -357,7 +362,8 @@ static int decode_enum(bitstr_t *bs, field_t *f, char *base, int level)
}
/****************************************************************************/
static int decode_bitstr(bitstr_t *bs, field_t *f, char *base, int level)
static int decode_bitstr(bitstr_t *bs, const struct field_t *f,
char *base, int level)
{
unsigned int len;
@ -390,7 +396,8 @@ static int decode_bitstr(bitstr_t *bs, field_t *f, char *base, int level)
}
/****************************************************************************/
static int decode_numstr(bitstr_t *bs, field_t *f, char *base, int level)
static int decode_numstr(bitstr_t *bs, const struct field_t *f,
char *base, int level)
{
unsigned int len;
@ -407,7 +414,8 @@ static int decode_numstr(bitstr_t *bs, field_t *f, char *base, int level)
}
/****************************************************************************/
static int decode_octstr(bitstr_t *bs, field_t *f, char *base, int level)
static int decode_octstr(bitstr_t *bs, const struct field_t *f,
char *base, int level)
{
unsigned int len;
@ -455,7 +463,8 @@ static int decode_octstr(bitstr_t *bs, field_t *f, char *base, int level)
}
/****************************************************************************/
static int decode_bmpstr(bitstr_t *bs, field_t *f, char *base, int level)
static int decode_bmpstr(bitstr_t *bs, const struct field_t *f,
char *base, int level)
{
unsigned int len;
@ -480,11 +489,12 @@ static int decode_bmpstr(bitstr_t *bs, field_t *f, char *base, int level)
}
/****************************************************************************/
static int decode_seq(bitstr_t *bs, field_t *f, char *base, int level)
static int decode_seq(bitstr_t *bs, const struct field_t *f,
char *base, int level)
{
unsigned int ext, bmp, i, opt, len = 0, bmp2, bmp2_len;
int err;
field_t *son;
const struct field_t *son;
unsigned char *beg = NULL;
PRINT("%*.s%s\n", level * TAB_SIZE, " ", f->name);
@ -596,11 +606,12 @@ static int decode_seq(bitstr_t *bs, field_t *f, char *base, int level)
}
/****************************************************************************/
static int decode_seqof(bitstr_t *bs, field_t *f, char *base, int level)
static int decode_seqof(bitstr_t *bs, const struct field_t *f,
char *base, int level)
{
unsigned int count, effective_count = 0, i, len = 0;
int err;
field_t *son;
const struct field_t *son;
unsigned char *beg = NULL;
PRINT("%*.s%s\n", level * TAB_SIZE, " ", f->name);
@ -685,11 +696,12 @@ static int decode_seqof(bitstr_t *bs, field_t *f, char *base, int level)
/****************************************************************************/
static int decode_choice(bitstr_t *bs, field_t *f, char *base, int level)
static int decode_choice(bitstr_t *bs, const struct field_t *f,
char *base, int level)
{
unsigned int type, ext, len = 0;
int err;
field_t *son;
const struct field_t *son;
unsigned char *beg = NULL;
PRINT("%*.s%s\n", level * TAB_SIZE, " ", f->name);
@ -756,7 +768,7 @@ static int decode_choice(bitstr_t *bs, field_t *f, char *base, int level)
/****************************************************************************/
int DecodeRasMessage(unsigned char *buf, size_t sz, RasMessage *ras)
{
static field_t ras_message = {
static const struct field_t ras_message = {
FNAME("RasMessage") CHOICE, 5, 24, 32, DECODE | EXT,
0, _RasMessage
};
@ -773,7 +785,7 @@ int DecodeRasMessage(unsigned char *buf, size_t sz, RasMessage *ras)
static int DecodeH323_UserInformation(unsigned char *buf, unsigned char *beg,
size_t sz, H323_UserInformation *uuie)
{
static field_t h323_userinformation = {
static const struct field_t h323_userinformation = {
FNAME("H323-UserInformation") SEQ, 1, 2, 2, DECODE | EXT,
0, _H323_UserInformation
};
@ -792,7 +804,7 @@ int DecodeMultimediaSystemControlMessage(unsigned char *buf, size_t sz,
MultimediaSystemControlMessage *
mscm)
{
static field_t multimediasystemcontrolmessage = {
static const struct field_t multimediasystemcontrolmessage = {
FNAME("MultimediaSystemControlMessage") CHOICE, 2, 4, 4,
DECODE | EXT, 0, _MultimediaSystemControlMessage
};

19
net/netfilter/nf_conntrack_h323_main.c
View file

@ -114,7 +114,8 @@ static int get_tpkt_data(struct sk_buff *skb, unsigned int protoff,
{
struct nf_ct_h323_master *info = &nfct_help(ct)->help.ct_h323_info;
int dir = CTINFO2DIR(ctinfo);
struct tcphdr _tcph, *th;
const struct tcphdr *th;
struct tcphdr _tcph;
int tcpdatalen;
int tcpdataoff;
unsigned char *tpkt;
@ -212,11 +213,11 @@ static int get_tpkt_data(struct sk_buff *skb, unsigned int protoff,
}
/****************************************************************************/
static int get_h245_addr(struct nf_conn *ct, unsigned char *data,
static int get_h245_addr(struct nf_conn *ct, const unsigned char *data,
H245_TransportAddress *taddr,
union nf_inet_addr *addr, __be16 *port)
{
unsigned char *p;
const unsigned char *p;
int family = ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.l3num;
int len;
@ -625,7 +626,7 @@ int get_h225_addr(struct nf_conn *ct, unsigned char *data,
TransportAddress *taddr,
union nf_inet_addr *addr, __be16 *port)
{
unsigned char *p;
const unsigned char *p;
int family = ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.l3num;
int len;
@ -704,9 +705,8 @@ static int expect_h245(struct sk_buff *skb, struct nf_conn *ct,
/* If the calling party is on the same side of the forward-to party,
* we don't need to track the second call */
static int callforward_do_filter(union nf_inet_addr *src,
union nf_inet_addr *dst,
int family)
static int callforward_do_filter(const union nf_inet_addr *src,
const union nf_inet_addr *dst, int family)
{
const struct nf_afinfo *afinfo;
struct flowi fl1, fl2;
@ -1185,7 +1185,8 @@ static struct nf_conntrack_helper nf_conntrack_helper_q931[] __read_mostly = {
static unsigned char *get_udp_data(struct sk_buff *skb, unsigned int protoff,
int *datalen)
{
struct udphdr _uh, *uh;
const struct udphdr *uh;
struct udphdr _uh;
int dataoff;
uh = skb_header_pointer(skb, protoff, sizeof(_uh), &_uh);
@ -1468,7 +1469,7 @@ static int process_arq(struct sk_buff *skb, struct nf_conn *ct,
enum ip_conntrack_info ctinfo,
unsigned char **data, AdmissionRequest *arq)
{
struct nf_ct_h323_master *info = &nfct_help(ct)->help.ct_h323_info;
const struct nf_ct_h323_master *info = &nfct_help(ct)->help.ct_h323_info;
int dir = CTINFO2DIR(ctinfo);
__be16 port;
union nf_inet_addr addr;

346
net/netfilter/nf_conntrack_h323_types.c
View file

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