tcp: md5: add more const attributes
Now tcp_md5_hash_header() has a const tcphdr argument, we can add more
const attributes to callers.
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/net/tcp.h b/include/net/tcp.h
index 910cc29..ed0e814 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -1185,8 +1185,9 @@
/* - functions */
extern int tcp_v4_md5_hash_skb(char *md5_hash, struct tcp_md5sig_key *key,
- struct sock *sk, struct request_sock *req,
- struct sk_buff *skb);
+ const struct sock *sk,
+ const struct request_sock *req,
+ const struct sk_buff *skb);
extern struct tcp_md5sig_key * tcp_v4_md5_lookup(struct sock *sk,
struct sock *addr_sk);
extern int tcp_v4_md5_do_add(struct sock *sk, __be32 addr, u8 *newkey,
@@ -1448,9 +1449,9 @@
struct sock *addr_sk);
int (*calc_md5_hash) (char *location,
struct tcp_md5sig_key *md5,
- struct sock *sk,
- struct request_sock *req,
- struct sk_buff *skb);
+ const struct sock *sk,
+ const struct request_sock *req,
+ const struct sk_buff *skb);
int (*md5_add) (struct sock *sk,
struct sock *addr_sk,
u8 *newkey,
@@ -1467,9 +1468,9 @@
struct request_sock *req);
int (*calc_md5_hash) (char *location,
struct tcp_md5sig_key *md5,
- struct sock *sk,
- struct request_sock *req,
- struct sk_buff *skb);
+ const struct sock *sk,
+ const struct request_sock *req,
+ const struct sk_buff *skb);
#endif
};
diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
index 955c925..1dad7e9 100644
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -92,7 +92,7 @@
static struct tcp_md5sig_key *tcp_v4_md5_do_lookup(struct sock *sk,
__be32 addr);
static int tcp_v4_md5_hash_hdr(char *md5_hash, struct tcp_md5sig_key *key,
- __be32 daddr, __be32 saddr, struct tcphdr *th);
+ __be32 daddr, __be32 saddr, const struct tcphdr *th);
#else
static inline
struct tcp_md5sig_key *tcp_v4_md5_do_lookup(struct sock *sk, __be32 addr)
@@ -1090,7 +1090,7 @@
}
static int tcp_v4_md5_hash_hdr(char *md5_hash, struct tcp_md5sig_key *key,
- __be32 daddr, __be32 saddr, struct tcphdr *th)
+ __be32 daddr, __be32 saddr, const struct tcphdr *th)
{
struct tcp_md5sig_pool *hp;
struct hash_desc *desc;
@@ -1122,12 +1122,12 @@
}
int tcp_v4_md5_hash_skb(char *md5_hash, struct tcp_md5sig_key *key,
- struct sock *sk, struct request_sock *req,
- struct sk_buff *skb)
+ const struct sock *sk, const struct request_sock *req,
+ const struct sk_buff *skb)
{
struct tcp_md5sig_pool *hp;
struct hash_desc *desc;
- struct tcphdr *th = tcp_hdr(skb);
+ const struct tcphdr *th = tcp_hdr(skb);
__be32 saddr, daddr;
if (sk) {
@@ -1172,7 +1172,7 @@
}
EXPORT_SYMBOL(tcp_v4_md5_hash_skb);
-static int tcp_v4_inbound_md5_hash(struct sock *sk, struct sk_buff *skb)
+static int tcp_v4_inbound_md5_hash(struct sock *sk, const struct sk_buff *skb)
{
/*
* This gets called for each TCP segment that arrives
diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index da2ada8..c8683fc 100644
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -761,7 +761,7 @@
static int tcp_v6_md5_hash_hdr(char *md5_hash, struct tcp_md5sig_key *key,
const struct in6_addr *daddr, struct in6_addr *saddr,
- struct tcphdr *th)
+ const struct tcphdr *th)
{
struct tcp_md5sig_pool *hp;
struct hash_desc *desc;
@@ -793,13 +793,14 @@
}
static int tcp_v6_md5_hash_skb(char *md5_hash, struct tcp_md5sig_key *key,
- struct sock *sk, struct request_sock *req,
- struct sk_buff *skb)
+ const struct sock *sk,
+ const struct request_sock *req,
+ const struct sk_buff *skb)
{
const struct in6_addr *saddr, *daddr;
struct tcp_md5sig_pool *hp;
struct hash_desc *desc;
- struct tcphdr *th = tcp_hdr(skb);
+ const struct tcphdr *th = tcp_hdr(skb);
if (sk) {
saddr = &inet6_sk(sk)->saddr;
@@ -842,12 +843,12 @@
return 1;
}
-static int tcp_v6_inbound_md5_hash (struct sock *sk, struct sk_buff *skb)
+static int tcp_v6_inbound_md5_hash(struct sock *sk, const struct sk_buff *skb)
{
const __u8 *hash_location = NULL;
struct tcp_md5sig_key *hash_expected;
const struct ipv6hdr *ip6h = ipv6_hdr(skb);
- struct tcphdr *th = tcp_hdr(skb);
+ const struct tcphdr *th = tcp_hdr(skb);
int genhash;
u8 newhash[16];