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Diffstat (limited to 'net/ipv6/exthdrs.c')
-rw-r--r--net/ipv6/exthdrs.c70
1 files changed, 13 insertions, 57 deletions
diff --git a/net/ipv6/exthdrs.c b/net/ipv6/exthdrs.c
index fa3d9c328092..473f628f9f20 100644
--- a/net/ipv6/exthdrs.c
+++ b/net/ipv6/exthdrs.c
@@ -43,56 +43,12 @@
#include <net/ndisc.h>
#include <net/ip6_route.h>
#include <net/addrconf.h>
-#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
+#if IS_ENABLED(CONFIG_IPV6_MIP6)
#include <net/xfrm.h>
#endif
#include <asm/uaccess.h>
-int ipv6_find_tlv(struct sk_buff *skb, int offset, int type)
-{
- const unsigned char *nh = skb_network_header(skb);
- int packet_len = skb->tail - skb->network_header;
- struct ipv6_opt_hdr *hdr;
- int len;
-
- if (offset + 2 > packet_len)
- goto bad;
- hdr = (struct ipv6_opt_hdr *)(nh + offset);
- len = ((hdr->hdrlen + 1) << 3);
-
- if (offset + len > packet_len)
- goto bad;
-
- offset += 2;
- len -= 2;
-
- while (len > 0) {
- int opttype = nh[offset];
- int optlen;
-
- if (opttype == type)
- return offset;
-
- switch (opttype) {
- case IPV6_TLV_PAD1:
- optlen = 1;
- break;
- default:
- optlen = nh[offset + 1] + 2;
- if (optlen > len)
- goto bad;
- break;
- }
- offset += optlen;
- len -= optlen;
- }
- /* not_found */
- bad:
- return -1;
-}
-EXPORT_SYMBOL_GPL(ipv6_find_tlv);
-
/*
* Parsing tlv encoded headers.
*
@@ -224,7 +180,7 @@ bad:
Destination options header.
*****************************/
-#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
+#if IS_ENABLED(CONFIG_IPV6_MIP6)
static bool ipv6_dest_hao(struct sk_buff *skb, int optoff)
{
struct ipv6_destopt_hao *hao;
@@ -288,7 +244,7 @@ static bool ipv6_dest_hao(struct sk_buff *skb, int optoff)
#endif
static const struct tlvtype_proc tlvprocdestopt_lst[] = {
-#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
+#if IS_ENABLED(CONFIG_IPV6_MIP6)
{
.type = IPV6_TLV_HAO,
.func = ipv6_dest_hao,
@@ -300,7 +256,7 @@ static const struct tlvtype_proc tlvprocdestopt_lst[] = {
static int ipv6_destopt_rcv(struct sk_buff *skb)
{
struct inet6_skb_parm *opt = IP6CB(skb);
-#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
+#if IS_ENABLED(CONFIG_IPV6_MIP6)
__u16 dstbuf;
#endif
struct dst_entry *dst = skb_dst(skb);
@@ -315,14 +271,14 @@ static int ipv6_destopt_rcv(struct sk_buff *skb)
}
opt->lastopt = opt->dst1 = skb_network_header_len(skb);
-#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
+#if IS_ENABLED(CONFIG_IPV6_MIP6)
dstbuf = opt->dst1;
#endif
if (ip6_parse_tlv(tlvprocdestopt_lst, skb)) {
skb->transport_header += (skb_transport_header(skb)[1] + 1) << 3;
opt = IP6CB(skb);
-#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
+#if IS_ENABLED(CONFIG_IPV6_MIP6)
opt->nhoff = dstbuf;
#else
opt->nhoff = opt->dst1;
@@ -378,7 +334,7 @@ static int ipv6_rthdr_rcv(struct sk_buff *skb)
looped_back:
if (hdr->segments_left == 0) {
switch (hdr->type) {
-#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
+#if IS_ENABLED(CONFIG_IPV6_MIP6)
case IPV6_SRCRT_TYPE_2:
/* Silently discard type 2 header unless it was
* processed by own
@@ -404,7 +360,7 @@ looped_back:
}
switch (hdr->type) {
-#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
+#if IS_ENABLED(CONFIG_IPV6_MIP6)
case IPV6_SRCRT_TYPE_2:
if (accept_source_route < 0)
goto unknown_rh;
@@ -461,7 +417,7 @@ looped_back:
addr += i - 1;
switch (hdr->type) {
-#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
+#if IS_ENABLED(CONFIG_IPV6_MIP6)
case IPV6_SRCRT_TYPE_2:
if (xfrm6_input_addr(skb, (xfrm_address_t *)addr,
(xfrm_address_t *)&ipv6_hdr(skb)->saddr,
@@ -528,12 +484,12 @@ unknown_rh:
static const struct inet6_protocol rthdr_protocol = {
.handler = ipv6_rthdr_rcv,
- .flags = INET6_PROTO_NOPOLICY | INET6_PROTO_GSO_EXTHDR,
+ .flags = INET6_PROTO_NOPOLICY,
};
static const struct inet6_protocol destopt_protocol = {
.handler = ipv6_destopt_rcv,
- .flags = INET6_PROTO_NOPOLICY | INET6_PROTO_GSO_EXTHDR,
+ .flags = INET6_PROTO_NOPOLICY,
};
static const struct inet6_protocol nodata_protocol = {
@@ -559,10 +515,10 @@ int __init ipv6_exthdrs_init(void)
out:
return ret;
-out_rthdr:
- inet6_del_protocol(&rthdr_protocol, IPPROTO_ROUTING);
out_destopt:
inet6_del_protocol(&destopt_protocol, IPPROTO_DSTOPTS);
+out_rthdr:
+ inet6_del_protocol(&rthdr_protocol, IPPROTO_ROUTING);
goto out;
};