[NETFILTER]: nf_{conntrack,nat}_sip: annotate SIP helper with const

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>

include/linux/netfilter/nf_conntrack_sip.h

@@ -30,9 +30,9 @@ extern unsigned int (*nf_nat_sdp_hook)(struct sk_buff *skb,
 				       struct nf_conntrack_expect *exp,
 				       const char *dptr);
 
-extern int ct_sip_get_info(struct nf_conn *ct, const char *dptr, size_t dlen,
-			   unsigned int *matchoff, unsigned int *matchlen,
-			   enum sip_header_pos pos);
+extern int ct_sip_get_info(const struct nf_conn *ct, const char *dptr,
+                           size_t dlen, unsigned int *matchoff,
+                           unsigned int *matchlen, enum sip_header_pos pos);
 extern int ct_sip_lnlen(const char *line, const char *limit);
 extern const char *ct_sip_search(const char *needle, const char *haystack,
 				 size_t needle_len, size_t haystack_len,

net/ipv4/netfilter/nf_nat_sip.c

@@ -35,9 +35,9 @@ struct addr_map {
 	} addr[IP_CT_DIR_MAX];
 };
 
-static void addr_map_init(struct nf_conn *ct, struct addr_map *map)
+static void addr_map_init(const struct nf_conn *ct, struct addr_map *map)
 {
-	struct nf_conntrack_tuple *t;
+	const struct nf_conntrack_tuple *t;
 	enum ip_conntrack_dir dir;
 	unsigned int n;
 

net/netfilter/nf_conntrack_sip.c

@@ -48,10 +48,10 @@ unsigned int (*nf_nat_sdp_hook)(struct sk_buff *skb,
 				const char *dptr) __read_mostly;
 EXPORT_SYMBOL_GPL(nf_nat_sdp_hook);
 
-static int digits_len(struct nf_conn *, const char *, const char *, int *);
-static int epaddr_len(struct nf_conn *, const char *, const char *, int *);
-static int skp_digits_len(struct nf_conn *, const char *, const char *, int *);
-static int skp_epaddr_len(struct nf_conn *, const char *, const char *, int *);
+static int digits_len(const struct nf_conn *, const char *, const char *, int *);
+static int epaddr_len(const struct nf_conn *, const char *, const char *, int *);
+static int skp_digits_len(const struct nf_conn *, const char *, const char *, int *);
+static int skp_epaddr_len(const struct nf_conn *, const char *, const char *, int *);
 
 struct sip_header_nfo {
 	const char	*lname;
@@ -61,7 +61,7 @@ struct sip_header_nfo {
 	size_t		snlen;
 	size_t		ln_strlen;
 	int		case_sensitive;
-	int		(*match_len)(struct nf_conn *, const char *,
+	int		(*match_len)(const struct nf_conn *, const char *,
 				     const char *, int *);
 };
 
@@ -225,7 +225,7 @@ const char *ct_sip_search(const char *needle, const char *haystack,
 }
 EXPORT_SYMBOL_GPL(ct_sip_search);
 
-static int digits_len(struct nf_conn *ct, const char *dptr,
+static int digits_len(const struct nf_conn *ct, const char *dptr,
 		      const char *limit, int *shift)
 {
 	int len = 0;
@@ -237,7 +237,7 @@ static int digits_len(struct nf_conn *ct, const char *dptr,
 }
 
 /* get digits length, skipping blank spaces. */
-static int skp_digits_len(struct nf_conn *ct, const char *dptr,
+static int skp_digits_len(const struct nf_conn *ct, const char *dptr,
 			  const char *limit, int *shift)
 {
 	for (; dptr <= limit && *dptr == ' '; dptr++)
@@ -246,8 +246,9 @@ static int skp_digits_len(struct nf_conn *ct, const char *dptr,
 	return digits_len(ct, dptr, limit, shift);
 }
 
-static int parse_addr(struct nf_conn *ct, const char *cp, const char **endp,
-		      union nf_inet_addr *addr, const char *limit)
+static int parse_addr(const struct nf_conn *ct, const char *cp,
+                      const char **endp, union nf_inet_addr *addr,
+                      const char *limit)
 {
 	const char *end;
 	int family = ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.l3num;
@@ -272,7 +273,7 @@ static int parse_addr(struct nf_conn *ct, const char *cp, const char **endp,
 }
 
 /* skip ip address. returns its length. */
-static int epaddr_len(struct nf_conn *ct, const char *dptr,
+static int epaddr_len(const struct nf_conn *ct, const char *dptr,
 		      const char *limit, int *shift)
 {
 	union nf_inet_addr addr;
@@ -292,7 +293,7 @@ static int epaddr_len(struct nf_conn *ct, const char *dptr,
 }
 
 /* get address length, skiping user info. */
-static int skp_epaddr_len(struct nf_conn *ct, const char *dptr,
+static int skp_epaddr_len(const struct nf_conn *ct, const char *dptr,
 			  const char *limit, int *shift)
 {
 	const char *start = dptr;
@@ -319,7 +320,7 @@ static int skp_epaddr_len(struct nf_conn *ct, const char *dptr,
 }
 
 /* Returns 0 if not found, -1 error parsing. */
-int ct_sip_get_info(struct nf_conn *ct,
+int ct_sip_get_info(const struct nf_conn *ct,
 		    const char *dptr, size_t dlen,
 		    unsigned int *matchoff,
 		    unsigned int *matchlen,