diff options
| -rw-r--r-- | include/linux/xfrm.h | 12 | ||||
| -rw-r--r-- | include/net/xfrm.h | 2 | ||||
| -rw-r--r-- | net/xfrm/xfrm_state.c | 19 | ||||
| -rw-r--r-- | net/xfrm/xfrm_user.c | 46 |
4 files changed, 79 insertions, 0 deletions
diff --git a/include/linux/xfrm.h b/include/linux/xfrm.h index 1d8c1f2..4009f44 100644 --- a/include/linux/xfrm.h +++ b/include/linux/xfrm.h @@ -166,6 +166,10 @@ enum { #define XFRM_MSG_NEWAE XFRM_MSG_NEWAE XFRM_MSG_GETAE, #define XFRM_MSG_GETAE XFRM_MSG_GETAE + + XFRM_MSG_REPORT, +#define XFRM_MSG_REPORT XFRM_MSG_REPORT + __XFRM_MSG_MAX }; #define XFRM_MSG_MAX (__XFRM_MSG_MAX - 1) @@ -325,12 +329,18 @@ struct xfrm_usersa_flush { __u8 proto; }; +struct xfrm_user_report { + __u8 proto; + struct xfrm_selector sel; +}; + #ifndef __KERNEL__ /* backwards compatibility for userspace */ #define XFRMGRP_ACQUIRE 1 #define XFRMGRP_EXPIRE 2 #define XFRMGRP_SA 4 #define XFRMGRP_POLICY 8 +#define XFRMGRP_REPORT 0x10 #endif enum xfrm_nlgroups { @@ -346,6 +356,8 @@ enum xfrm_nlgroups { #define XFRMNLGRP_POLICY XFRMNLGRP_POLICY XFRMNLGRP_AEVENTS, #define XFRMNLGRP_AEVENTS XFRMNLGRP_AEVENTS + XFRMNLGRP_REPORT, +#define XFRMNLGRP_REPORT XFRMNLGRP_REPORT __XFRMNLGRP_MAX }; #define XFRMNLGRP_MAX (__XFRMNLGRP_MAX - 1) diff --git a/include/net/xfrm.h b/include/net/xfrm.h index 9ebbdc1..0b223ee 100644 --- a/include/net/xfrm.h +++ b/include/net/xfrm.h @@ -381,6 +381,7 @@ struct xfrm_mgr struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir); int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, u16 sport); int (*notify_policy)(struct xfrm_policy *x, int dir, struct km_event *c); + int (*report)(u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr); }; extern int xfrm_register_km(struct xfrm_mgr *km); @@ -1043,6 +1044,7 @@ extern void xfrm_init_pmtu(struct dst_entry *dst); extern wait_queue_head_t km_waitq; extern int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, u16 sport); extern void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 pid); +extern int km_report(u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr); extern void xfrm_input_init(void); extern int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, u32 *spi, u32 *seq); diff --git a/net/xfrm/xfrm_state.c b/net/xfrm/xfrm_state.c index 3da89c0..a26ef69 100644 --- a/net/xfrm/xfrm_state.c +++ b/net/xfrm/xfrm_state.c @@ -1055,6 +1055,25 @@ void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 pid) } EXPORT_SYMBOL(km_policy_expired); +int km_report(u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr) +{ + int err = -EINVAL; + int ret; + struct xfrm_mgr *km; + + read_lock(&xfrm_km_lock); + list_for_each_entry(km, &xfrm_km_list, list) { + if (km->report) { + ret = km->report(proto, sel, addr); + if (!ret) + err = ret; + } + } + read_unlock(&xfrm_km_lock); + return err; +} +EXPORT_SYMBOL(km_report); + int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen) { int err; diff --git a/net/xfrm/xfrm_user.c b/net/xfrm/xfrm_user.c index 770bd24..7303b82 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) |