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authorMasahide NAKAMURA <nakam@linux-ipv6.org>2006-08-23 22:51:02 -0700
committerDavid S. Miller <davem@sunset.davemloft.net>2006-09-22 15:08:36 -0700
commit58c949d1b9551f3e4ba9dde4aeda341ecf5e42b5 (patch)
treed219f78a417aeb03167b786d84f878ede237da2f /net
parentf7b6983f0feeefcd2a594138adcffe640593d8de (diff)
[XFRM] IPV6: Add sort functions to combine templates/states for IPsec.
Add sort functions to combine templates/states for IPsec. Think of outbound transformation order we should be careful with transport AH which must be the last of all transport ones. Signed-off-by: Masahide NAKAMURA <nakam@linux-ipv6.org> Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/ipv6/xfrm6_state.c97
1 files changed, 97 insertions, 0 deletions
diff --git a/net/ipv6/xfrm6_state.c b/net/ipv6/xfrm6_state.c
index 9c95b9d3e11..e0b8f3c5caa 100644
--- a/net/ipv6/xfrm6_state.c
+++ b/net/ipv6/xfrm6_state.c
@@ -156,12 +156,109 @@ __xfrm6_find_acq(u8 mode, u32 reqid, u8 proto,
return x0;
}
+static int
+__xfrm6_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n)
+{
+ int i;
+ int j = 0;
+
+ /* Rule 1: select IPsec transport except AH */
+ for (i = 0; i < n; i++) {
+ if (src[i]->props.mode == XFRM_MODE_TRANSPORT &&
+ src[i]->id.proto != IPPROTO_AH) {
+ dst[j++] = src[i];
+ src[i] = NULL;
+ }
+ }
+ if (j == n)
+ goto end;
+
+ /* XXX: Rule 2: select MIPv6 RO or inbound trigger */
+
+ /* Rule 3: select IPsec transport AH */
+ for (i = 0; i < n; i++) {
+ if (src[i] &&
+ src[i]->props.mode == XFRM_MODE_TRANSPORT &&
+ src[i]->id.proto == IPPROTO_AH) {
+ dst[j++] = src[i];
+ src[i] = NULL;
+ }
+ }
+ if (j == n)
+ goto end;
+
+ /* Rule 4: select IPsec tunnel */
+ for (i = 0; i < n; i++) {
+ if (src[i] &&
+ src[i]->props.mode == XFRM_MODE_TUNNEL) {
+ dst[j++] = src[i];
+ src[i] = NULL;
+ }
+ }
+ if (likely(j == n))
+ goto end;
+
+ /* Final rule */
+ for (i = 0; i < n; i++) {
+ if (src[i]) {
+ dst[j++] = src[i];
+ src[i] = NULL;
+ }
+ }
+
+ end:
+ return 0;
+}
+
+static int
+__xfrm6_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n)
+{
+ int i;
+ int j = 0;
+
+ /* Rule 1: select IPsec transport */
+ for (i = 0; i < n; i++) {
+ if (src[i]->mode == XFRM_MODE_TRANSPORT) {
+ dst[j++] = src[i];
+ src[i] = NULL;
+ }
+ }
+ if (j == n)
+ goto end;
+
+ /* XXX: Rule 2: select MIPv6 RO or inbound trigger */
+
+ /* Rule 3: select IPsec tunnel */
+ for (i = 0; i < n; i++) {
+ if (src[i] &&
+ src[i]->mode == XFRM_MODE_TUNNEL) {
+ dst[j++] = src[i];
+ src[i] = NULL;
+ }
+ }
+ if (likely(j == n))
+ goto end;
+
+ /* Final rule */
+ for (i = 0; i < n; i++) {
+ if (src[i]) {
+ dst[j++] = src[i];
+ src[i] = NULL;
+ }
+ }
+
+ end:
+ return 0;
+}
+
static struct xfrm_state_afinfo xfrm6_state_afinfo = {
.family = AF_INET6,
.init_tempsel = __xfrm6_init_tempsel,
.state_lookup = __xfrm6_state_lookup,
.state_lookup_byaddr = __xfrm6_state_lookup_byaddr,
.find_acq = __xfrm6_find_acq,
+ .tmpl_sort = __xfrm6_tmpl_sort,
+ .state_sort = __xfrm6_state_sort,
};
void __init xfrm6_state_init(void)