diff options
Diffstat (limited to 'net/xfrm/xfrm_user.c')
| -rw-r--r-- | net/xfrm/xfrm_user.c | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/net/xfrm/xfrm_user.c b/net/xfrm/xfrm_user.c index f91521d5f2ab..cb4cc1bde5d1 100644 --- a/net/xfrm/xfrm_user.c +++ b/net/xfrm/xfrm_user.c @@ -672,6 +672,61 @@ static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb, return skb; } +static int build_sadinfo(struct sk_buff *skb, u32 pid, u32 seq, u32 flags) +{ + struct xfrm_sadinfo si; + struct nlmsghdr *nlh; + u32 *f; + + nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSADINFO, sizeof(u32), 0); + if (nlh == NULL) /* shouldnt really happen ... */ + return -EMSGSIZE; + + f = nlmsg_data(nlh); + *f = flags; + xfrm_sad_getinfo(&si); + + if (flags & XFRM_SAD_HMASK) + NLA_PUT_U32(skb, XFRMA_SADHMASK, si.sadhcnt); + if (flags & XFRM_SAD_HMAX) + NLA_PUT_U32(skb, XFRMA_SADHMAX, si.sadhmcnt); + if (flags & XFRM_SAD_CNT) + NLA_PUT_U32(skb, XFRMA_SADCNT, si.sadcnt); + + return nlmsg_end(skb, nlh); + +nla_put_failure: + nlmsg_cancel(skb, nlh); + return -EMSGSIZE; +} + +static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh, + struct rtattr **xfrma) +{ + struct sk_buff *r_skb; + u32 *flags = NLMSG_DATA(nlh); + u32 spid = NETLINK_CB(skb).pid; + u32 seq = nlh->nlmsg_seq; + int len = NLMSG_LENGTH(sizeof(u32)); + + if (*flags & XFRM_SAD_HMASK) + len += RTA_SPACE(sizeof(u32)); + if (*flags & XFRM_SAD_HMAX) + len += RTA_SPACE(sizeof(u32)); + if (*flags & XFRM_SAD_CNT) + len += RTA_SPACE(sizeof(u32)); + + r_skb = alloc_skb(len, GFP_ATOMIC); + + if (r_skb == NULL) + return -ENOMEM; + + if (build_sadinfo(r_skb, spid, seq, *flags) < 0) + BUG(); + + return nlmsg_unicast(xfrm_nl, r_skb, spid); +} + static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh, struct rtattr **xfrma) { @@ -1850,6 +1905,7 @@ static struct xfrm_link { [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae }, [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae }, [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate }, + [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_sadinfo }, }; static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) |