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authorYOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>2006-08-24 18:18:12 +0400
committerDavid S. Miller <davem@sunset.davemloft.net>2006-09-23 02:17:58 +0400
commite731c248ba9e8c7025ae8b4a3fa48e4236b82e52 (patch)
tree784c9e9420283f73604f81f31f445ab9b097795a /net/ipv6
parente4bec827feda76d5e7417a2696a75424834d564f (diff)
downloadlinux-e731c248ba9e8c7025ae8b4a3fa48e4236b82e52.tar.xz
[IPV6] MIP6: Several obvious clean-ups.
- Remove redundant code. Pointed out by Brian Haley <brian.haley@hp.com>. - Unify code paths with/without CONFIG_IPV6_MIP. - Use NIP6_FMT for IPv6 address textual presentation. - Fold long line. Pointed out by David Miller <davem@davemloft.net>. Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Diffstat (limited to 'net/ipv6')
-rw-r--r--net/ipv6/ah6.c45
-rw-r--r--net/ipv6/exthdrs.c1
-rw-r--r--net/ipv6/mip6.c6
3 files changed, 10 insertions, 42 deletions
diff --git a/net/ipv6/ah6.c b/net/ipv6/ah6.c
index 0f2b4e330aa9..b0d83e8e4252 100644
--- a/net/ipv6/ah6.c
+++ b/net/ipv6/ah6.c
@@ -128,9 +128,7 @@ static void ipv6_rearrange_destopt(struct ipv6hdr *iph, struct ipv6_opt_hdr *des
off += optlen;
len -= optlen;
}
- if (len == 0)
- return;
-
+ /* Note: ok if len == 0 */
bad:
return;
}
@@ -175,11 +173,7 @@ static void ipv6_rearrange_rthdr(struct ipv6hdr *iph, struct ipv6_rt_hdr *rthdr)
ipv6_addr_copy(&iph->daddr, &final_addr);
}
-#ifdef CONFIG_IPV6_MIP6
static int ipv6_clear_mutable_options(struct ipv6hdr *iph, int len, int dir)
-#else
-static int ipv6_clear_mutable_options(struct ipv6hdr *iph, int len)
-#endif
{
union {
struct ipv6hdr *iph;
@@ -194,30 +188,12 @@ static int ipv6_clear_mutable_options(struct ipv6hdr *iph, int len)
while (exthdr.raw < end) {
switch (nexthdr) {
-#ifdef CONFIG_IPV6_MIP6
- case NEXTHDR_HOP:
- if (!zero_out_mutable_opts(exthdr.opth)) {
- LIMIT_NETDEBUG(
- KERN_WARNING "overrun %sopts\n",
- nexthdr == NEXTHDR_HOP ?
- "hop" : "dest");
- return -EINVAL;
- }
- break;
case NEXTHDR_DEST:
+#ifdef CONFIG_IPV6_MIP6
if (dir == XFRM_POLICY_OUT)
ipv6_rearrange_destopt(iph, exthdr.opth);
- if (!zero_out_mutable_opts(exthdr.opth)) {
- LIMIT_NETDEBUG(
- KERN_WARNING "overrun %sopts\n",
- nexthdr == NEXTHDR_HOP ?
- "hop" : "dest");
- return -EINVAL;
- }
- break;
-#else
+#endif
case NEXTHDR_HOP:
- case NEXTHDR_DEST:
if (!zero_out_mutable_opts(exthdr.opth)) {
LIMIT_NETDEBUG(
KERN_WARNING "overrun %sopts\n",
@@ -226,7 +202,6 @@ static int ipv6_clear_mutable_options(struct ipv6hdr *iph, int len)
return -EINVAL;
}
break;
-#endif
case NEXTHDR_ROUTING:
ipv6_rearrange_rthdr(iph, exthdr.rth);
@@ -282,16 +257,13 @@ static int ah6_output(struct xfrm_state *x, struct sk_buff *skb)
}
#ifdef CONFIG_IPV6_MIP6
memcpy(tmp_ext, &top_iph->saddr, extlen);
- err = ipv6_clear_mutable_options(top_iph,
- extlen - sizeof(*tmp_ext) +
- sizeof(*top_iph),
- XFRM_POLICY_OUT);
#else
memcpy(tmp_ext, &top_iph->daddr, extlen);
+#endif
err = ipv6_clear_mutable_options(top_iph,
extlen - sizeof(*tmp_ext) +
- sizeof(*top_iph));
-#endif
+ sizeof(*top_iph),
+ XFRM_POLICY_OUT);
if (err)
goto error_free_iph;
}
@@ -386,13 +358,8 @@ static int ah6_input(struct xfrm_state *x, struct sk_buff *skb)
if (!tmp_hdr)
goto out;
memcpy(tmp_hdr, skb->nh.raw, hdr_len);
-#ifdef CONFIG_IPV6_MIP6
if (ipv6_clear_mutable_options(skb->nh.ipv6h, hdr_len, XFRM_POLICY_IN))
goto free_out;
-#else
- if (ipv6_clear_mutable_options(skb->nh.ipv6h, hdr_len))
- goto free_out;
-#endif
skb->nh.ipv6h->priority = 0;
skb->nh.ipv6h->flow_lbl[0] = 0;
skb->nh.ipv6h->flow_lbl[1] = 0;
diff --git a/net/ipv6/exthdrs.c b/net/ipv6/exthdrs.c
index 6a6466bb5f26..084f78c3479b 100644
--- a/net/ipv6/exthdrs.c
+++ b/net/ipv6/exthdrs.c
@@ -87,7 +87,6 @@ int ipv6_find_tlv(struct sk_buff *skb, int offset, int type)
len -= optlen;
}
/* not_found */
- return -1;
bad:
return -1;
}
diff --git a/net/ipv6/mip6.c b/net/ipv6/mip6.c
index 70854035c131..99d116caecda 100644
--- a/net/ipv6/mip6.c
+++ b/net/ipv6/mip6.c
@@ -121,7 +121,8 @@ int mip6_mh_filter(struct sock *sk, struct sk_buff *skb)
&skb->nh.ipv6h->daddr,
mhlen, IPPROTO_MH,
skb_checksum(skb, 0, mhlen, 0))) {
- LIMIT_NETDEBUG(KERN_DEBUG "mip6: MH checksum failed [%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x > %04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x]\n",
+ LIMIT_NETDEBUG(KERN_DEBUG "mip6: MH checksum failed "
+ "[" NIP6_FMT " > " NIP6_FMT "]\n",
NIP6(skb->nh.ipv6h->saddr),
NIP6(skb->nh.ipv6h->daddr));
return -1;
@@ -234,7 +235,8 @@ static int mip6_destopt_reject(struct xfrm_state *x, struct sk_buff *skb, struct
struct timeval stamp;
int err = 0;
- if (unlikely(fl->proto == IPPROTO_MH && fl->fl_mh_type <= IP6_MH_TYPE_MAX))
+ if (unlikely(fl->proto == IPPROTO_MH &&
+ fl->fl_mh_type <= IP6_MH_TYPE_MAX))
goto out;
if (likely(opt->dsthao)) {