diff options
| author | Masahide NAKAMURA <nakam@linux-ipv6.org> | 2006-08-23 22:51:02 -0700 |
|---|---|---|
| committer | David S. Miller <davem@sunset.davemloft.net> | 2006-09-22 15:08:36 -0700 |
| commit | 58c949d1b9551f3e4ba9dde4aeda341ecf5e42b5 (patch) | |
| tree | d219f78a417aeb03167b786d84f878ede237da2f /net/ipv6/xfrm6_state.c | |
| parent | f7b6983f0feeefcd2a594138adcffe640593d8de (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/ipv6/xfrm6_state.c')
| -rw-r--r-- | net/ipv6/xfrm6_state.c | 97 |
1 files changed, 97 insertions, 0 deletions
diff --git a/net/ipv6/xfrm6_state.c b/net/ipv6/xfrm6_state.c index 9c95b9d3e110..e0b8f3c5caa2 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) |