X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=net%2Fxfrm%2Fxfrm_user.c;h=81d1005830f4d23d88ba4b06c4932fef1f060345;hb=43bc926fffd92024b46cafaf7350d669ba9ca884;hp=97509011c274c7c0f1c698acc24fed817f861a2d;hpb=cee37fe97739d85991964371c1f3a745c00dd236;p=linux-2.6.git diff --git a/net/xfrm/xfrm_user.c b/net/xfrm/xfrm_user.c index 97509011c..81d100583 100644 --- a/net/xfrm/xfrm_user.c +++ b/net/xfrm/xfrm_user.c @@ -7,7 +7,7 @@ * Kazunori MIYAZAWA @USAGI * Kunihiro Ishiguro * IPv6 support - * + * */ #include @@ -18,7 +18,6 @@ #include #include #include -#include #include #include #include @@ -26,10 +25,9 @@ #include #include #include +#include #include -static struct sock *xfrm_nl; - static int verify_one_alg(struct rtattr **xfrma, enum xfrm_attr_type_t type) { struct rtattr *rt = xfrma[type - 1]; @@ -88,6 +86,31 @@ static int verify_encap_tmpl(struct rtattr **xfrma) return 0; } + +static inline int verify_sec_ctx_len(struct rtattr **xfrma) +{ + struct rtattr *rt = xfrma[XFRMA_SEC_CTX - 1]; + struct xfrm_user_sec_ctx *uctx; + int len = 0; + + if (!rt) + return 0; + + if (rt->rta_len < sizeof(*uctx)) + return -EINVAL; + + uctx = RTA_DATA(rt); + + len += sizeof(struct xfrm_user_sec_ctx); + len += uctx->ctx_len; + + if (uctx->len != len) + return -EINVAL; + + return 0; +} + + static int verify_newsa_info(struct xfrm_usersa_info *p, struct rtattr **xfrma) { @@ -145,6 +168,8 @@ static int verify_newsa_info(struct xfrm_usersa_info *p, goto out; if ((err = verify_encap_tmpl(xfrma))) goto out; + if ((err = verify_sec_ctx_len(xfrma))) + goto out; err = -EINVAL; switch (p->mode) { @@ -209,6 +234,30 @@ static int attach_encap_tmpl(struct xfrm_encap_tmpl **encapp, struct rtattr *u_a return 0; } + +static inline int xfrm_user_sec_ctx_size(struct xfrm_policy *xp) +{ + struct xfrm_sec_ctx *xfrm_ctx = xp->security; + int len = 0; + + if (xfrm_ctx) { + len += sizeof(struct xfrm_user_sec_ctx); + len += xfrm_ctx->ctx_len; + } + return len; +} + +static int attach_sec_ctx(struct xfrm_state *x, struct rtattr *u_arg) +{ + struct xfrm_user_sec_ctx *uctx; + + if (!u_arg) + return 0; + + uctx = RTA_DATA(u_arg); + return security_xfrm_state_alloc(x, uctx); +} + static void copy_from_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p) { memcpy(&x->id, &p->id, sizeof(x->id)); @@ -222,6 +271,56 @@ static void copy_from_user_state(struct xfrm_state *x, struct xfrm_usersa_info * x->props.flags = p->flags; } +/* + * someday when pfkey also has support, we could have the code + * somehow made shareable and move it to xfrm_state.c - JHS + * +*/ +static int xfrm_update_ae_params(struct xfrm_state *x, struct rtattr **xfrma) +{ + int err = - EINVAL; + struct rtattr *rp = xfrma[XFRMA_REPLAY_VAL-1]; + struct rtattr *lt = xfrma[XFRMA_LTIME_VAL-1]; + struct rtattr *et = xfrma[XFRMA_ETIMER_THRESH-1]; + struct rtattr *rt = xfrma[XFRMA_REPLAY_THRESH-1]; + + if (rp) { + struct xfrm_replay_state *replay; + if (RTA_PAYLOAD(rp) < sizeof(*replay)) + goto error; + replay = RTA_DATA(rp); + memcpy(&x->replay, replay, sizeof(*replay)); + memcpy(&x->preplay, replay, sizeof(*replay)); + } + + if (lt) { + struct xfrm_lifetime_cur *ltime; + if (RTA_PAYLOAD(lt) < sizeof(*ltime)) + goto error; + ltime = RTA_DATA(lt); + x->curlft.bytes = ltime->bytes; + x->curlft.packets = ltime->packets; + x->curlft.add_time = ltime->add_time; + x->curlft.use_time = ltime->use_time; + } + + if (et) { + if (RTA_PAYLOAD(et) < sizeof(u32)) + goto error; + x->replay_maxage = *(u32*)RTA_DATA(et); + } + + if (rt) { + if (RTA_PAYLOAD(rt) < sizeof(u32)) + goto error; + x->replay_maxdiff = *(u32*)RTA_DATA(rt); + } + + return 0; +error: + return err; +} + static struct xfrm_state *xfrm_state_construct(struct xfrm_usersa_info *p, struct rtattr **xfrma, int *errp) @@ -249,18 +348,26 @@ static struct xfrm_state *xfrm_state_construct(struct xfrm_usersa_info *p, if ((err = attach_encap_tmpl(&x->encap, xfrma[XFRMA_ENCAP-1]))) goto error; - err = -ENOENT; - x->type = xfrm_get_type(x->id.proto, x->props.family); - if (x->type == NULL) + err = xfrm_init_state(x); + if (err) goto error; - err = x->type->init_state(x, NULL); - if (err) + if ((err = attach_sec_ctx(x, xfrma[XFRMA_SEC_CTX-1]))) goto error; - x->curlft.add_time = (unsigned long) xtime.tv_sec; - x->km.state = XFRM_STATE_VALID; x->km.seq = p->seq; + x->replay_maxdiff = sysctl_xfrm_aevent_rseqth; + /* sysctl_xfrm_aevent_etime is in 100ms units */ + x->replay_maxage = (sysctl_xfrm_aevent_etime*HZ)/XFRM_AE_ETH_M; + x->preplay.bitmap = 0; + x->preplay.seq = x->replay.seq+x->replay_maxdiff; + x->preplay.oseq = x->replay.oseq +x->replay_maxdiff; + + /* override default values from above */ + + err = xfrm_update_ae_params(x, (struct rtattr **)xfrma); + if (err < 0) + goto error; return x; @@ -277,15 +384,17 @@ static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma) struct xfrm_usersa_info *p = NLMSG_DATA(nlh); struct xfrm_state *x; int err; + struct km_event c; - err = verify_newsa_info(p, (struct rtattr **) xfrma); + err = verify_newsa_info(p, (struct rtattr **)xfrma); if (err) return err; - x = xfrm_state_construct(p, (struct rtattr **) xfrma, &err); + x = xfrm_state_construct(p, (struct rtattr **)xfrma, &err); if (!x) return err; + xfrm_state_hold(x); if (nlh->nlmsg_type == XFRM_MSG_NEWSA) err = xfrm_state_add(x); else @@ -293,15 +402,25 @@ static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma) if (err < 0) { x->km.state = XFRM_STATE_DEAD; - xfrm_state_put(x); + __xfrm_state_put(x); + goto out; } + c.seq = nlh->nlmsg_seq; + c.pid = nlh->nlmsg_pid; + c.event = nlh->nlmsg_type; + + km_state_notify(x, &c); +out: + xfrm_state_put(x); return err; } static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma) { struct xfrm_state *x; + int err; + struct km_event c; struct xfrm_usersa_id *p = NLMSG_DATA(nlh); x = xfrm_state_lookup(&p->daddr, p->spi, p->proto, p->family); @@ -313,10 +432,19 @@ static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma) return -EPERM; } - xfrm_state_delete(x); + err = xfrm_state_delete(x); + if (err < 0) { + xfrm_state_put(x); + return err; + } + + c.seq = nlh->nlmsg_seq; + c.pid = nlh->nlmsg_pid; + c.event = nlh->nlmsg_type; + km_state_notify(x, &c); xfrm_state_put(x); - return 0; + return err; } static void copy_to_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p) @@ -376,6 +504,19 @@ static int dump_one_state(struct xfrm_state *x, int count, void *ptr) if (x->encap) RTA_PUT(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap); + if (x->security) { + int ctx_size = sizeof(struct xfrm_sec_ctx) + + x->security->ctx_len; + struct rtattr *rt = __RTA_PUT(skb, XFRMA_SEC_CTX, ctx_size); + struct xfrm_user_sec_ctx *uctx = RTA_DATA(rt); + + uctx->exttype = XFRMA_SEC_CTX; + uctx->len = ctx_size; + uctx->ctx_doi = x->security->ctx_doi; + uctx->ctx_alg = x->security->ctx_alg; + uctx->ctx_len = x->security->ctx_len; + memcpy(uctx + 1, x->security->ctx_str, x->security->ctx_len); + } nlh->nlmsg_len = skb->tail - b; out: sp->this_idx++; @@ -589,6 +730,18 @@ static int verify_newpolicy_info(struct xfrm_userpolicy_info *p) return verify_policy_dir(p->dir); } +static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct rtattr **xfrma) +{ + struct rtattr *rt = xfrma[XFRMA_SEC_CTX-1]; + struct xfrm_user_sec_ctx *uctx; + + if (!rt) + return 0; + + uctx = RTA_DATA(rt); + return security_xfrm_policy_alloc(pol, uctx); +} + static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut, int nr) { @@ -667,7 +820,10 @@ static struct xfrm_policy *xfrm_policy_construct(struct xfrm_userpolicy_info *p, } copy_from_user_policy(xp, p); - err = copy_from_user_tmpl(xp, xfrma); + + if (!(err = copy_from_user_tmpl(xp, xfrma))) + err = copy_from_user_sec_ctx(xp, xfrma); + if (err) { *errp = err; kfree(xp); @@ -681,24 +837,38 @@ static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfr { struct xfrm_userpolicy_info *p = NLMSG_DATA(nlh); struct xfrm_policy *xp; + struct km_event c; int err; int excl; err = verify_newpolicy_info(p); + if (err) + return err; + err = verify_sec_ctx_len((struct rtattr **)xfrma); if (err) return err; - xp = xfrm_policy_construct(p, (struct rtattr **) xfrma, &err); + xp = xfrm_policy_construct(p, (struct rtattr **)xfrma, &err); if (!xp) return err; + /* shouldnt excl be based on nlh flags?? + * Aha! this is anti-netlink really i.e more pfkey derived + * in netlink excl is a flag and you wouldnt need + * a type XFRM_MSG_UPDPOLICY - JHS */ excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY; err = xfrm_policy_insert(p->dir, xp, excl); if (err) { + security_xfrm_policy_free(xp); kfree(xp); return err; } + c.event = nlh->nlmsg_type; + c.seq = nlh->nlmsg_seq; + c.pid = nlh->nlmsg_pid; + km_policy_notify(xp, p->dir, &c); + xfrm_pol_put(xp); return 0; @@ -737,6 +907,27 @@ rtattr_failure: return -1; } +static int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb) +{ + if (xp->security) { + int ctx_size = sizeof(struct xfrm_sec_ctx) + + xp->security->ctx_len; + struct rtattr *rt = __RTA_PUT(skb, XFRMA_SEC_CTX, ctx_size); + struct xfrm_user_sec_ctx *uctx = RTA_DATA(rt); + + uctx->exttype = XFRMA_SEC_CTX; + uctx->len = ctx_size; + uctx->ctx_doi = xp->security->ctx_doi; + uctx->ctx_alg = xp->security->ctx_alg; + uctx->ctx_len = xp->security->ctx_len; + memcpy(uctx + 1, xp->security->ctx_str, xp->security->ctx_len); + } + return 0; + + rtattr_failure: + return -1; +} + static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr) { struct xfrm_dump_info *sp = ptr; @@ -758,6 +949,8 @@ static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr copy_to_user_policy(xp, p, dir); if (copy_to_user_tmpl(xp, skb) < 0) goto nlmsg_failure; + if (copy_to_user_sec_ctx(xp, skb)) + goto nlmsg_failure; nlh->nlmsg_len = skb->tail - b; out: @@ -816,6 +1009,7 @@ static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfr struct xfrm_policy *xp; struct xfrm_userpolicy_id *p; int err; + struct km_event c; int delete; p = NLMSG_DATA(nlh); @@ -827,8 +1021,25 @@ static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfr if (p->index) xp = xfrm_policy_byid(p->dir, p->index, delete); - else - xp = xfrm_policy_bysel(p->dir, &p->sel, delete); + else { + struct rtattr **rtattrs = (struct rtattr **)xfrma; + struct rtattr *rt = rtattrs[XFRMA_SEC_CTX-1]; + struct xfrm_policy tmp; + + err = verify_sec_ctx_len(rtattrs); + if (err) + return err; + + memset(&tmp, 0, sizeof(struct xfrm_policy)); + if (rt) { + struct xfrm_user_sec_ctx *uctx = RTA_DATA(rt); + + if ((err = security_xfrm_policy_alloc(&tmp, uctx))) + return err; + } + xp = xfrm_policy_bysel_ctx(p->dir, &p->sel, tmp.security, delete); + security_xfrm_policy_free(&tmp); + } if (xp == NULL) return -ENOENT; @@ -843,6 +1054,12 @@ static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfr NETLINK_CB(skb).pid, MSG_DONTWAIT); } + } else { + c.data.byid = p->index; + c.event = nlh->nlmsg_type; + c.seq = nlh->nlmsg_seq; + c.pid = nlh->nlmsg_pid; + km_policy_notify(xp, p->dir, &c); } xfrm_pol_put(xp); @@ -852,18 +1069,297 @@ static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfr static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma) { + struct km_event c; struct xfrm_usersa_flush *p = NLMSG_DATA(nlh); xfrm_state_flush(p->proto); + c.data.proto = p->proto; + c.event = nlh->nlmsg_type; + c.seq = nlh->nlmsg_seq; + c.pid = nlh->nlmsg_pid; + km_state_notify(NULL, &c); + return 0; } + +static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c) +{ + struct xfrm_aevent_id *id; + struct nlmsghdr *nlh; + struct xfrm_lifetime_cur ltime; + unsigned char *b = skb->tail; + + nlh = NLMSG_PUT(skb, c->pid, c->seq, XFRM_MSG_NEWAE, sizeof(*id)); + id = NLMSG_DATA(nlh); + nlh->nlmsg_flags = 0; + + id->sa_id.daddr = x->id.daddr; + id->sa_id.spi = x->id.spi; + id->sa_id.family = x->props.family; + id->sa_id.proto = x->id.proto; + id->flags = c->data.aevent; + + RTA_PUT(skb, XFRMA_REPLAY_VAL, sizeof(x->replay), &x->replay); + + ltime.bytes = x->curlft.bytes; + ltime.packets = x->curlft.packets; + ltime.add_time = x->curlft.add_time; + ltime.use_time = x->curlft.use_time; + + RTA_PUT(skb, XFRMA_LTIME_VAL, sizeof(struct xfrm_lifetime_cur), <ime); + + if (id->flags&XFRM_AE_RTHR) { + RTA_PUT(skb,XFRMA_REPLAY_THRESH,sizeof(u32),&x->replay_maxdiff); + } + + if (id->flags&XFRM_AE_ETHR) { + u32 etimer = x->replay_maxage*10/HZ; + RTA_PUT(skb,XFRMA_ETIMER_THRESH,sizeof(u32),&etimer); + } + + nlh->nlmsg_len = skb->tail - b; + return skb->len; + +rtattr_failure: +nlmsg_failure: + skb_trim(skb, b - skb->data); + return -1; +} + +static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma) +{ + struct xfrm_state *x; + struct sk_buff *r_skb; + int err; + struct km_event c; + struct xfrm_aevent_id *p = NLMSG_DATA(nlh); + int len = NLMSG_LENGTH(sizeof(struct xfrm_aevent_id)); + struct xfrm_usersa_id *id = &p->sa_id; + + len += RTA_SPACE(sizeof(struct xfrm_replay_state)); + len += RTA_SPACE(sizeof(struct xfrm_lifetime_cur)); + + if (p->flags&XFRM_AE_RTHR) + len+=RTA_SPACE(sizeof(u32)); + + if (p->flags&XFRM_AE_ETHR) + len+=RTA_SPACE(sizeof(u32)); + + r_skb = alloc_skb(len, GFP_ATOMIC); + if (r_skb == NULL) + return -ENOMEM; + + x = xfrm_state_lookup(&id->daddr, id->spi, id->proto, id->family); + if (x == NULL) { + kfree(r_skb); + return -ESRCH; + } + + /* + * XXX: is this lock really needed - none of the other + * gets lock (the concern is things getting updated + * while we are still reading) - jhs + */ + spin_lock_bh(&x->lock); + c.data.aevent = p->flags; + c.seq = nlh->nlmsg_seq; + c.pid = nlh->nlmsg_pid; + + if (build_aevent(r_skb, x, &c) < 0) + BUG(); + err = netlink_unicast(xfrm_nl, r_skb, + NETLINK_CB(skb).pid, MSG_DONTWAIT); + spin_unlock_bh(&x->lock); + xfrm_state_put(x); + return err; +} + +static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma) +{ + struct xfrm_state *x; + struct km_event c; + int err = - EINVAL; + struct xfrm_aevent_id *p = NLMSG_DATA(nlh); + struct rtattr *rp = xfrma[XFRMA_REPLAY_VAL-1]; + struct rtattr *lt = xfrma[XFRMA_LTIME_VAL-1]; + + if (!lt && !rp) + return err; + + /* pedantic mode - thou shalt sayeth replaceth */ + if (!(nlh->nlmsg_flags&NLM_F_REPLACE)) + return err; + + x = xfrm_state_lookup(&p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family); + if (x == NULL) + return -ESRCH; + + if (x->km.state != XFRM_STATE_VALID) + goto out; + + spin_lock_bh(&x->lock); + err = xfrm_update_ae_params(x,(struct rtattr **)xfrma); + spin_unlock_bh(&x->lock); + if (err < 0) + goto out; + + c.event = nlh->nlmsg_type; + c.seq = nlh->nlmsg_seq; + c.pid = nlh->nlmsg_pid; + c.data.aevent = XFRM_AE_CU; + km_state_notify(x, &c); + err = 0; +out: + xfrm_state_put(x); + return err; +} + static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma) { +struct km_event c; + xfrm_policy_flush(); + c.event = nlh->nlmsg_type; + c.seq = nlh->nlmsg_seq; + c.pid = nlh->nlmsg_pid; + km_policy_notify(NULL, 0, &c); return 0; } +static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma) +{ + struct xfrm_policy *xp; + struct xfrm_user_polexpire *up = NLMSG_DATA(nlh); + struct xfrm_userpolicy_info *p = &up->pol; + int err = -ENOENT; + + if (p->index) + xp = xfrm_policy_byid(p->dir, p->index, 0); + else { + struct rtattr **rtattrs = (struct rtattr **)xfrma; + struct rtattr *rt = rtattrs[XFRMA_SEC_CTX-1]; + struct xfrm_policy tmp; + + err = verify_sec_ctx_len(rtattrs); + if (err) + return err; + + memset(&tmp, 0, sizeof(struct xfrm_policy)); + if (rt) { + struct xfrm_user_sec_ctx *uctx = RTA_DATA(rt); + + if ((err = security_xfrm_policy_alloc(&tmp, uctx))) + return err; + } + xp = xfrm_policy_bysel_ctx(p->dir, &p->sel, tmp.security, 0); + security_xfrm_policy_free(&tmp); + } + + if (xp == NULL) + return err; + read_lock(&xp->lock); + if (xp->dead) { + read_unlock(&xp->lock); + goto out; + } + + read_unlock(&xp->lock); + err = 0; + if (up->hard) { + xfrm_policy_delete(xp, p->dir); + } else { + // reset the timers here? + printk("Dont know what to do with soft policy expire\n"); + } + km_policy_expired(xp, p->dir, up->hard, current->pid); + +out: + xfrm_pol_put(xp); + return err; +} + +static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma) +{ + struct xfrm_state *x; + int err; + struct xfrm_user_expire *ue = NLMSG_DATA(nlh); + struct xfrm_usersa_info *p = &ue->state; + + x = xfrm_state_lookup(&p->id.daddr, p->id.spi, p->id.proto, p->family); + err = -ENOENT; + + if (x == NULL) + return err; + + err = -EINVAL; + + spin_lock_bh(&x->lock); + if (x->km.state != XFRM_STATE_VALID) + goto out; + km_state_expired(x, ue->hard, current->pid); + + if (ue->hard) + __xfrm_state_delete(x); +out: + spin_unlock_bh(&x->lock); + xfrm_state_put(x); + return err; +} + +static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma) +{ + struct xfrm_policy *xp; + struct xfrm_user_tmpl *ut; + int i; + struct rtattr *rt = xfrma[XFRMA_TMPL-1]; + + struct xfrm_user_acquire *ua = NLMSG_DATA(nlh); + struct xfrm_state *x = xfrm_state_alloc(); + int err = -ENOMEM; + + if (!x) + return err; + + err = verify_newpolicy_info(&ua->policy); + if (err) { + printk("BAD policy passed\n"); + kfree(x); + return err; + } + + /* build an XP */ + xp = xfrm_policy_construct(&ua->policy, (struct rtattr **) xfrma, &err); if (!xp) { + kfree(x); + return err; + } + + memcpy(&x->id, &ua->id, sizeof(ua->id)); + memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr)); + memcpy(&x->sel, &ua->sel, sizeof(ua->sel)); + + ut = RTA_DATA(rt); + /* extract the templates and for each call km_key */ + for (i = 0; i < xp->xfrm_nr; i++, ut++) { + struct xfrm_tmpl *t = &xp->xfrm_vec[i]; + memcpy(&x->id, &t->id, sizeof(x->id)); + x->props.mode = t->mode; + x->props.reqid = t->reqid; + x->props.family = ut->family; + t->aalgos = ua->aalgos; + t->ealgos = ua->ealgos; + t->calgos = ua->calgos; + err = km_query(x, t, xp); + + } + + kfree(x); + kfree(xp); + + return 0; +} + + #define XMSGSIZE(type) NLMSG_LENGTH(sizeof(struct type)) static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = { @@ -881,6 +1377,8 @@ static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = { [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire), [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush), [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), }; #undef XMSGSIZE @@ -898,17 +1396,17 @@ static struct xfrm_link { [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy, .dump = xfrm_dump_policy }, [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi }, + [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire }, + [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire }, [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy }, [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa }, + [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire}, [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa }, [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy }, + [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae }, + [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae }, }; -static int xfrm_done(struct netlink_callback *cb) -{ - return 0; -} - static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, int *errp) { struct rtattr *xfrma[XFRMA_MAX]; @@ -940,20 +1438,15 @@ static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, int *err if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) || type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) && (nlh->nlmsg_flags & NLM_F_DUMP)) { - u32 rlen; - if (link->dump == NULL) goto err_einval; if ((*errp = netlink_dump_start(xfrm_nl, skb, nlh, - link->dump, - xfrm_done)) != 0) { + link->dump, NULL)) != 0) { return -1; } - rlen = NLMSG_ALIGN(nlh->nlmsg_len); - if (rlen > skb->len) - rlen = skb->len; - skb_pull(skb, rlen); + + netlink_queue_skip(nlh, skb); return -1; } @@ -988,78 +1481,31 @@ err_einval: return -1; } -static int xfrm_user_rcv_skb(struct sk_buff *skb) -{ - int err; - struct nlmsghdr *nlh; - - while (skb->len >= NLMSG_SPACE(0)) { - u32 rlen; - - nlh = (struct nlmsghdr *) skb->data; - if (nlh->nlmsg_len < sizeof(*nlh) || - skb->len < nlh->nlmsg_len) - return 0; - rlen = NLMSG_ALIGN(nlh->nlmsg_len); - if (rlen > skb->len) - rlen = skb->len; - if (xfrm_user_rcv_msg(skb, nlh, &err) < 0) { - if (err == 0) - return -1; - netlink_ack(skb, nlh, err); - } else if (nlh->nlmsg_flags & NLM_F_ACK) - netlink_ack(skb, nlh, 0); - skb_pull(skb, rlen); - } - - return 0; -} - static void xfrm_netlink_rcv(struct sock *sk, int len) { - unsigned int qlen = skb_queue_len(&sk->sk_receive_queue); + unsigned int qlen = 0; do { - struct sk_buff *skb; - - down(&xfrm_cfg_sem); - - if (qlen > skb_queue_len(&sk->sk_receive_queue)) - qlen = skb_queue_len(&sk->sk_receive_queue); - - for (; qlen; qlen--) { - skb = skb_dequeue(&sk->sk_receive_queue); - if (xfrm_user_rcv_skb(skb)) { - if (skb->len) - skb_queue_head(&sk->sk_receive_queue, - skb); - else { - kfree_skb(skb); - qlen--; - } - break; - } - kfree_skb(skb); - } - - up(&xfrm_cfg_sem); + mutex_lock(&xfrm_cfg_mutex); + netlink_run_queue(sk, &qlen, &xfrm_user_rcv_msg); + mutex_unlock(&xfrm_cfg_mutex); } while (qlen); } -static int build_expire(struct sk_buff *skb, struct xfrm_state *x, int hard) +static int build_expire(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c) { struct xfrm_user_expire *ue; struct nlmsghdr *nlh; unsigned char *b = skb->tail; - nlh = NLMSG_PUT(skb, 0, 0, XFRM_MSG_EXPIRE, + nlh = NLMSG_PUT(skb, c->pid, 0, XFRM_MSG_EXPIRE, sizeof(*ue)); ue = NLMSG_DATA(nlh); nlh->nlmsg_flags = 0; copy_to_user_state(x, &ue->state); - ue->hard = (hard != 0) ? 1 : 0; + ue->hard = (c->data.hard != 0) ? 1 : 0; nlh->nlmsg_len = skb->tail - b; return skb->len; @@ -1069,20 +1515,167 @@ nlmsg_failure: return -1; } -static int xfrm_send_state_notify(struct xfrm_state *x, int hard) +static int xfrm_exp_state_notify(struct xfrm_state *x, struct km_event *c) { struct sk_buff *skb; + int len = NLMSG_LENGTH(sizeof(struct xfrm_user_expire)); - skb = alloc_skb(sizeof(struct xfrm_user_expire) + 16, GFP_ATOMIC); + skb = alloc_skb(len, GFP_ATOMIC); if (skb == NULL) return -ENOMEM; - if (build_expire(skb, x, hard) < 0) + if (build_expire(skb, x, c) < 0) BUG(); - NETLINK_CB(skb).dst_groups = XFRMGRP_EXPIRE; + NETLINK_CB(skb).dst_group = XFRMNLGRP_EXPIRE; + return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC); +} + +static int xfrm_aevent_state_notify(struct xfrm_state *x, struct km_event *c) +{ + struct sk_buff *skb; + int len = NLMSG_LENGTH(sizeof(struct xfrm_aevent_id)); + + len += RTA_SPACE(sizeof(struct xfrm_replay_state)); + len += RTA_SPACE(sizeof(struct xfrm_lifetime_cur)); + skb = alloc_skb(len, GFP_ATOMIC); + if (skb == NULL) + return -ENOMEM; + + if (build_aevent(skb, x, c) < 0) + BUG(); + + NETLINK_CB(skb).dst_group = XFRMNLGRP_AEVENTS; + return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_AEVENTS, GFP_ATOMIC); +} + +static int xfrm_notify_sa_flush(struct km_event *c) +{ + struct xfrm_usersa_flush *p; + struct nlmsghdr *nlh; + struct sk_buff *skb; + unsigned char *b; + int len = NLMSG_LENGTH(sizeof(struct xfrm_usersa_flush)); + + skb = alloc_skb(len, GFP_ATOMIC); + if (skb == NULL) + return -ENOMEM; + b = skb->tail; + + nlh = NLMSG_PUT(skb, c->pid, c->seq, + XFRM_MSG_FLUSHSA, sizeof(*p)); + nlh->nlmsg_flags = 0; + + p = NLMSG_DATA(nlh); + p->proto = c->data.proto; + + nlh->nlmsg_len = skb->tail - b; + + NETLINK_CB(skb).dst_group = XFRMNLGRP_SA; + return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC); + +nlmsg_failure: + kfree_skb(skb); + return -1; +} + +static int inline xfrm_sa_len(struct xfrm_state *x) +{ + int l = 0; + if (x->aalg) + l += RTA_SPACE(sizeof(*x->aalg) + (x->aalg->alg_key_len+7)/8); + if (x->ealg) + l += RTA_SPACE(sizeof(*x->ealg) + (x->ealg->alg_key_len+7)/8); + if (x->calg) + l += RTA_SPACE(sizeof(*x->calg)); + if (x->encap) + l += RTA_SPACE(sizeof(*x->encap)); + + return l; +} + +static int xfrm_notify_sa(struct xfrm_state *x, struct km_event *c) +{ + struct xfrm_usersa_info *p; + struct xfrm_usersa_id *id; + struct nlmsghdr *nlh; + struct sk_buff *skb; + unsigned char *b; + int len = xfrm_sa_len(x); + int headlen; + + headlen = sizeof(*p); + if (c->event == XFRM_MSG_DELSA) { + len += RTA_SPACE(headlen); + headlen = sizeof(*id); + } + len += NLMSG_SPACE(headlen); + + skb = alloc_skb(len, GFP_ATOMIC); + if (skb == NULL) + return -ENOMEM; + b = skb->tail; + + nlh = NLMSG_PUT(skb, c->pid, c->seq, c->event, headlen); + nlh->nlmsg_flags = 0; + + p = NLMSG_DATA(nlh); + if (c->event == XFRM_MSG_DELSA) { + id = NLMSG_DATA(nlh); + memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr)); + id->spi = x->id.spi; + id->family = x->props.family; + id->proto = x->id.proto; + + p = RTA_DATA(__RTA_PUT(skb, XFRMA_SA, sizeof(*p))); + } + + copy_to_user_state(x, p); + + if (x->aalg) + RTA_PUT(skb, XFRMA_ALG_AUTH, + sizeof(*(x->aalg))+(x->aalg->alg_key_len+7)/8, x->aalg); + if (x->ealg) + RTA_PUT(skb, XFRMA_ALG_CRYPT, + sizeof(*(x->ealg))+(x->ealg->alg_key_len+7)/8, x->ealg); + if (x->calg) + RTA_PUT(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg); + + if (x->encap) + RTA_PUT(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap); + + nlh->nlmsg_len = skb->tail - b; + + NETLINK_CB(skb).dst_group = XFRMNLGRP_SA; + return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC); + +nlmsg_failure: +rtattr_failure: + kfree_skb(skb); + return -1; +} + +static int xfrm_send_state_notify(struct xfrm_state *x, struct km_event *c) +{ + + switch (c->event) { + case XFRM_MSG_EXPIRE: + return xfrm_exp_state_notify(x, c); + case XFRM_MSG_NEWAE: + return xfrm_aevent_state_notify(x, c); + case XFRM_MSG_DELSA: + case XFRM_MSG_UPDSA: + case XFRM_MSG_NEWSA: + return xfrm_notify_sa(x, c); + case XFRM_MSG_FLUSHSA: + return xfrm_notify_sa_flush(c); + default: + printk("xfrm_user: Unknown SA event %d\n", c->event); + break; + } + + return 0; - return netlink_broadcast(xfrm_nl, skb, 0, XFRMGRP_EXPIRE, GFP_ATOMIC); } static int build_acquire(struct sk_buff *skb, struct xfrm_state *x, @@ -1110,6 +1703,8 @@ static int build_acquire(struct sk_buff *skb, struct xfrm_state *x, if (copy_to_user_tmpl(xp, skb) < 0) goto nlmsg_failure; + if (copy_to_user_sec_ctx(xp, skb)) + goto nlmsg_failure; nlh->nlmsg_len = skb->tail - b; return skb->len; @@ -1127,6 +1722,7 @@ static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt, len = RTA_SPACE(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr); len += NLMSG_SPACE(sizeof(struct xfrm_user_acquire)); + len += RTA_SPACE(xfrm_user_sec_ctx_size(xp)); skb = alloc_skb(len, GFP_ATOMIC); if (skb == NULL) return -ENOMEM; @@ -1134,9 +1730,8 @@ static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt, if (build_acquire(skb, x, xt, xp, dir) < 0) BUG(); - NETLINK_CB(skb).dst_groups = XFRMGRP_ACQUIRE; - - return netlink_broadcast(xfrm_nl, skb, 0, XFRMGRP_ACQUIRE, GFP_ATOMIC); + NETLINK_CB(skb).dst_group = XFRMNLGRP_ACQUIRE; + return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_ACQUIRE, GFP_ATOMIC); } /* User gives us xfrm_user_policy_info followed by an array of 0 @@ -1180,6 +1775,9 @@ static struct xfrm_policy *xfrm_compile_policy(u16 family, int opt, if (nr > XFRM_MAX_DEPTH) return NULL; + if (p->dir > XFRM_POLICY_OUT) + return NULL; + xp = xfrm_policy_alloc(GFP_KERNEL); if (xp == NULL) { *dir = -ENOBUFS; @@ -1195,19 +1793,22 @@ static struct xfrm_policy *xfrm_compile_policy(u16 family, int opt, } static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp, - int dir, int hard) + int dir, struct km_event *c) { struct xfrm_user_polexpire *upe; struct nlmsghdr *nlh; + int hard = c->data.hard; unsigned char *b = skb->tail; - nlh = NLMSG_PUT(skb, 0, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe)); + nlh = NLMSG_PUT(skb, c->pid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe)); upe = NLMSG_DATA(nlh); nlh->nlmsg_flags = 0; copy_to_user_policy(xp, &upe->pol, dir); if (copy_to_user_tmpl(xp, skb) < 0) goto nlmsg_failure; + if (copy_to_user_sec_ctx(xp, skb)) + goto nlmsg_failure; upe->hard = !!hard; nlh->nlmsg_len = skb->tail - b; @@ -1218,23 +1819,122 @@ nlmsg_failure: return -1; } -static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, int hard) +static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c) { struct sk_buff *skb; size_t len; len = RTA_SPACE(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr); len += NLMSG_SPACE(sizeof(struct xfrm_user_polexpire)); + len += RTA_SPACE(xfrm_user_sec_ctx_size(xp)); skb = alloc_skb(len, GFP_ATOMIC); if (skb == NULL) return -ENOMEM; - if (build_polexpire(skb, xp, dir, hard) < 0) + if (build_polexpire(skb, xp, dir, c) < 0) BUG(); - NETLINK_CB(skb).dst_groups = XFRMGRP_EXPIRE; + NETLINK_CB(skb).dst_group = XFRMNLGRP_EXPIRE; + return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC); +} + +static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c) +{ + struct xfrm_userpolicy_info *p; + struct xfrm_userpolicy_id *id; + struct nlmsghdr *nlh; + struct sk_buff *skb; + unsigned char *b; + int len = RTA_SPACE(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr); + int headlen; + + headlen = sizeof(*p); + if (c->event == XFRM_MSG_DELPOLICY) { + len += RTA_SPACE(headlen); + headlen = sizeof(*id); + } + len += NLMSG_SPACE(headlen); + + skb = alloc_skb(len, GFP_ATOMIC); + if (skb == NULL) + return -ENOMEM; + b = skb->tail; + + nlh = NLMSG_PUT(skb, c->pid, c->seq, c->event, headlen); + + p = NLMSG_DATA(nlh); + if (c->event == XFRM_MSG_DELPOLICY) { + id = NLMSG_DATA(nlh); + memset(id, 0, sizeof(*id)); + id->dir = dir; + if (c->data.byid) + id->index = xp->index; + else + memcpy(&id->sel, &xp->selector, sizeof(id->sel)); + + p = RTA_DATA(__RTA_PUT(skb, XFRMA_POLICY, sizeof(*p))); + } + + nlh->nlmsg_flags = 0; + + copy_to_user_policy(xp, p, dir); + if (copy_to_user_tmpl(xp, skb) < 0) + goto nlmsg_failure; + + nlh->nlmsg_len = skb->tail - b; + + NETLINK_CB(skb).dst_group = XFRMNLGRP_POLICY; + return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC); + +nlmsg_failure: +rtattr_failure: + kfree_skb(skb); + return -1; +} + +static int xfrm_notify_policy_flush(struct km_event *c) +{ + struct nlmsghdr *nlh; + struct sk_buff *skb; + unsigned char *b; + int len = NLMSG_LENGTH(0); + + skb = alloc_skb(len, GFP_ATOMIC); + if (skb == NULL) + return -ENOMEM; + b = skb->tail; + + + nlh = NLMSG_PUT(skb, c->pid, c->seq, XFRM_MSG_FLUSHPOLICY, 0); + + nlh->nlmsg_len = skb->tail - b; + + NETLINK_CB(skb).dst_group = XFRMNLGRP_POLICY; + return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC); + +nlmsg_failure: + kfree_skb(skb); + return -1; +} + +static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c) +{ + + switch (c->event) { + case XFRM_MSG_NEWPOLICY: + case XFRM_MSG_UPDPOLICY: + case XFRM_MSG_DELPOLICY: + return xfrm_notify_policy(xp, dir, c); + case XFRM_MSG_FLUSHPOLICY: + return xfrm_notify_policy_flush(c); + case XFRM_MSG_POLEXPIRE: + return xfrm_exp_policy_notify(xp, dir, c); + default: + printk("xfrm_user: Unknown Policy event %d\n", c->event); + } + + return 0; - return netlink_broadcast(xfrm_nl, skb, 0, XFRMGRP_EXPIRE, GFP_ATOMIC); } static struct xfrm_mgr netlink_mgr = { @@ -1247,11 +1947,15 @@ static struct xfrm_mgr netlink_mgr = { static int __init xfrm_user_init(void) { + struct sock *nlsk; + printk(KERN_INFO "Initializing IPsec netlink socket\n"); - xfrm_nl = netlink_kernel_create(NETLINK_XFRM, xfrm_netlink_rcv); - if (xfrm_nl == NULL) + nlsk = netlink_kernel_create(NETLINK_XFRM, XFRMNLGRP_MAX, + xfrm_netlink_rcv, THIS_MODULE); + if (nlsk == NULL) return -ENOMEM; + rcu_assign_pointer(xfrm_nl, nlsk); xfrm_register_km(&netlink_mgr); @@ -1260,10 +1964,16 @@ static int __init xfrm_user_init(void) static void __exit xfrm_user_exit(void) { + struct sock *nlsk = xfrm_nl; + xfrm_unregister_km(&netlink_mgr); - sock_release(xfrm_nl->sk_socket); + rcu_assign_pointer(xfrm_nl, NULL); + synchronize_rcu(); + sock_release(nlsk->sk_socket); } module_init(xfrm_user_init); module_exit(xfrm_user_exit); MODULE_LICENSE("GPL"); +MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM); +