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| author | Masahide NAKAMURA <nakam@linux-ipv6.org> | 2006-08-23 20:44:06 -0700 |
|---|---|---|
| committer | David S. Miller <davem@sunset.davemloft.net> | 2006-09-22 15:08:30 -0700 |
| commit | 97a64b4577ae2bc5599dbd008a3cd9e25de9b9f5 (patch) | |
| tree | 424700fb0a41b28c5615d0d21ca74d699e1fa872 /net/xfrm/xfrm_user.c | |
| parent | df0ba92a99ca757039dfa84a929281ea3f7a50e8 (diff) | |
| download | lwn-97a64b4577ae2bc5599dbd008a3cd9e25de9b9f5.tar.gz lwn-97a64b4577ae2bc5599dbd008a3cd9e25de9b9f5.zip | |
[XFRM]: Introduce XFRM_MSG_REPORT.
XFRM_MSG_REPORT is a message as notification of state protocol and
selector from kernel to user-space.
Mobile IPv6 will use it when inbound reject is occurred at route
optimization to make user-space know a binding error requirement.
Based on MIPL2 kernel patch.
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/xfrm/xfrm_user.c')
| -rw-r--r-- | net/xfrm/xfrm_user.c | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/net/xfrm/xfrm_user.c b/net/xfrm/xfrm_user.c index 770bd2410749..7303b820bea4 100644 --- a/net/xfrm/xfrm_user.c +++ b/net/xfrm/xfrm_user.c @@ -1491,6 +1491,7 @@ static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = { [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = NLMSG_LENGTH(0), [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id), [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id), + [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report), }; #undef XMSGSIZE @@ -2058,12 +2059,57 @@ static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, struct km_ev } +static int build_report(struct sk_buff *skb, u8 proto, + struct xfrm_selector *sel, xfrm_address_t *addr) +{ + struct xfrm_user_report *ur; + struct nlmsghdr *nlh; + unsigned char *b = skb->tail; + + nlh = NLMSG_PUT(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur)); + ur = NLMSG_DATA(nlh); + nlh->nlmsg_flags = 0; + + ur->proto = proto; + memcpy(&ur->sel, sel, sizeof(ur->sel)); + + if (addr) + RTA_PUT(skb, XFRMA_COADDR, sizeof(*addr), addr); + + nlh->nlmsg_len = skb->tail - b; + return skb->len; + +nlmsg_failure: +rtattr_failure: + skb_trim(skb, b - skb->data); + return -1; +} + +static int xfrm_send_report(u8 proto, struct xfrm_selector *sel, + xfrm_address_t *addr) +{ + struct sk_buff *skb; + size_t len; + + len = NLMSG_ALIGN(NLMSG_LENGTH(sizeof(struct xfrm_user_report))); + skb = alloc_skb(len, GFP_ATOMIC); + if (skb == NULL) + return -ENOMEM; + + if (build_report(skb, proto, sel, addr) < 0) + BUG(); + + NETLINK_CB(skb).dst_group = XFRMNLGRP_REPORT; + return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_REPORT, GFP_ATOMIC); +} + static struct xfrm_mgr netlink_mgr = { .id = "netlink", .notify = xfrm_send_state_notify, .acquire = xfrm_send_acquire, .compile_policy = xfrm_compile_policy, .notify_policy = xfrm_send_policy_notify, + .report = xfrm_send_report, }; static int __init xfrm_user_init(void) |