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authorArnaud Ebalard <arno@natisbad.org>2010-06-01 21:35:01 +0000
committerDavid S. Miller <davem@davemloft.net>2010-06-02 07:08:31 -0700
commit20c59de2e6b6bc74bbf714dcd4e720afe8d516cf (patch)
tree45e5c62e286368f8259b844cb7cf796d19066fb0 /net/dccp
parentd92222e27fdc98d73df25f3d49fb1ff3a3369bec (diff)
downloadvexpress-lsk-20c59de2e6b6bc74bbf714dcd4e720afe8d516cf.tar.gz
ipv6: Refactor update of IPv6 flowi destination address for srcrt (RH) option
There are more than a dozen occurrences of following code in the IPv6 stack: if (opt && opt->srcrt) { struct rt0_hdr *rt0 = (struct rt0_hdr *) opt->srcrt; ipv6_addr_copy(&final, &fl.fl6_dst); ipv6_addr_copy(&fl.fl6_dst, rt0->addr); final_p = &final; } Replace those with a helper. Note that the helper overrides final_p in all cases. This is ok as final_p was previously initialized to NULL when declared. Signed-off-by: Arnaud Ebalard <arno@natisbad.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/dccp')
-rw-r--r--net/dccp/ipv6.c30
1 files changed, 6 insertions, 24 deletions
diff --git a/net/dccp/ipv6.c b/net/dccp/ipv6.c
index 09169889959..6e3f32575df 100644
--- a/net/dccp/ipv6.c
+++ b/net/dccp/ipv6.c
@@ -248,7 +248,7 @@ static int dccp_v6_send_response(struct sock *sk, struct request_sock *req,
struct ipv6_pinfo *np = inet6_sk(sk);
struct sk_buff *skb;
struct ipv6_txoptions *opt = NULL;
- struct in6_addr *final_p = NULL, final;
+ struct in6_addr *final_p, final;
struct flowi fl;
int err = -1;
struct dst_entry *dst;
@@ -265,13 +265,7 @@ static int dccp_v6_send_response(struct sock *sk, struct request_sock *req,
opt = np->opt;
- if (opt != NULL && opt->srcrt != NULL) {
- const struct rt0_hdr *rt0 = (struct rt0_hdr *)opt->srcrt;
-
- ipv6_addr_copy(&final, &fl.fl6_dst);
- ipv6_addr_copy(&fl.fl6_dst, rt0->addr);
- final_p = &final;
- }
+ final_p = fl6_update_dst(&fl, opt, &final);
err = ip6_dst_lookup(sk, &dst, &fl);
if (err)
@@ -545,19 +539,13 @@ static struct sock *dccp_v6_request_recv_sock(struct sock *sk,
goto out_overflow;
if (dst == NULL) {
- struct in6_addr *final_p = NULL, final;
+ struct in6_addr *final_p, final;
struct flowi fl;
memset(&fl, 0, sizeof(fl));
fl.proto = IPPROTO_DCCP;
ipv6_addr_copy(&fl.fl6_dst, &ireq6->rmt_addr);
- if (opt != NULL && opt->srcrt != NULL) {
- const struct rt0_hdr *rt0 = (struct rt0_hdr *)opt->srcrt;
-
- ipv6_addr_copy(&final, &fl.fl6_dst);
- ipv6_addr_copy(&fl.fl6_dst, rt0->addr);
- final_p = &final;
- }
+ final_p = fl6_update_dst(&fl, opt, &final);
ipv6_addr_copy(&fl.fl6_src, &ireq6->loc_addr);
fl.oif = sk->sk_bound_dev_if;
fl.fl_ip_dport = inet_rsk(req)->rmt_port;
@@ -885,7 +873,7 @@ static int dccp_v6_connect(struct sock *sk, struct sockaddr *uaddr,
struct inet_sock *inet = inet_sk(sk);
struct ipv6_pinfo *np = inet6_sk(sk);
struct dccp_sock *dp = dccp_sk(sk);
- struct in6_addr *saddr = NULL, *final_p = NULL, final;
+ struct in6_addr *saddr = NULL, *final_p, final;
struct flowi fl;
struct dst_entry *dst;
int addr_type;
@@ -988,13 +976,7 @@ static int dccp_v6_connect(struct sock *sk, struct sockaddr *uaddr,
fl.fl_ip_sport = inet->inet_sport;
security_sk_classify_flow(sk, &fl);
- if (np->opt != NULL && np->opt->srcrt != NULL) {
- const struct rt0_hdr *rt0 = (struct rt0_hdr *)np->opt->srcrt;
-
- ipv6_addr_copy(&final, &fl.fl6_dst);
- ipv6_addr_copy(&fl.fl6_dst, rt0->addr);
- final_p = &final;
- }
+ final_p = fl6_update_dst(&fl, np->opt, &final);
err = ip6_dst_lookup(sk, &dst, &fl);
if (err)