[XFRM] STATE: Introduce care-of address.

Care-of address is carried by state as a transformation option like
IPsec encryption/authentication algorithm.

Based on MIPL2 kernel patch.

Signed-off-by: Noriaki TAKAMIYA <takamiya@po.ntts.co.jp>
Signed-off-by: Masahide NAKAMURA <nakam@linux-ipv6.org>
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>

diff --git a/include/linux/xfrm.h b/include/linux/xfrm.h
index a7c9e4c..b53f799 100644 (file)
--- a/include/linux/xfrm.h
+++ b/include/linux/xfrm.h
@@ -235,6 +235,7 @@ enum xfrm_attr_type_t {
        XFRMA_REPLAY_THRESH,
        XFRMA_ETIMER_THRESH,
        XFRMA_SRCADDR,          /* xfrm_address_t */
+       XFRMA_COADDR,           /* xfrm_address_t */
        __XFRMA_MAX
 
 #define XFRMA_MAX (__XFRMA_MAX - 1)

diff --git a/include/net/xfrm.h b/include/net/xfrm.h
index aa93cc1..872a2a4 100644 (file)
--- a/include/net/xfrm.h
+++ b/include/net/xfrm.h
@@ -134,6 +134,9 @@ struct xfrm_state
        /* Data for encapsulator */
        struct xfrm_encap_tmpl  *encap;
 
+       /* Data for care-of address */
+       xfrm_address_t  *coaddr;
+
        /* IPComp needs an IPIP tunnel for handling uncompressed packets */
        struct xfrm_state       *tunnel;
 

diff --git a/net/xfrm/xfrm_state.c b/net/xfrm/xfrm_state.c
index f053715..3da89c0 100644 (file)
--- a/net/xfrm/xfrm_state.c
+++ b/net/xfrm/xfrm_state.c
@@ -78,6 +78,7 @@ static void xfrm_state_gc_destroy(struct xfrm_state *x)
        kfree(x->ealg);
        kfree(x->calg);
        kfree(x->encap);
+       kfree(x->coaddr);
        if (x->mode)
                xfrm_put_mode(x->mode);
        if (x->type) {
@@ -603,6 +604,11 @@ out:
        if (likely(x1->km.state == XFRM_STATE_VALID)) {
                if (x->encap && x1->encap)
                        memcpy(x1->encap, x->encap, sizeof(*x1->encap));
+               if (x->coaddr && x1->coaddr) {
+                       memcpy(x1->coaddr, x->coaddr, sizeof(*x1->coaddr));
+               }
+               if (!use_spi && memcmp(&x1->sel, &x->sel, sizeof(x1->sel)))
+                       memcpy(&x1->sel, &x->sel, sizeof(x1->sel));
                memcpy(&x1->lft, &x->lft, sizeof(x1->lft));
                x1->km.dying = 0;
 

diff --git a/net/xfrm/xfrm_user.c b/net/xfrm/xfrm_user.c
index b5f8ab7..939808d 100644 (file)
--- a/net/xfrm/xfrm_user.c
+++ b/net/xfrm/xfrm_user.c
@@ -187,11 +187,14 @@ static int verify_newsa_info(struct xfrm_usersa_info *p,
                goto out;
        if ((err = verify_sec_ctx_len(xfrma)))
                goto out;
+       if ((err = verify_one_addr(xfrma, XFRMA_COADDR, NULL)))
+               goto out;
 
        err = -EINVAL;
        switch (p->mode) {
        case XFRM_MODE_TRANSPORT:
        case XFRM_MODE_TUNNEL:
+       case XFRM_MODE_ROUTEOPTIMIZATION:
                break;
 
        default:
@@ -276,6 +279,24 @@ static int attach_sec_ctx(struct xfrm_state *x, struct rtattr *u_arg)
        return security_xfrm_state_alloc(x, uctx);
 }
 
+static int attach_one_addr(xfrm_address_t **addrpp, struct rtattr *u_arg)
+{
+       struct rtattr *rta = u_arg;
+       xfrm_address_t *p, *uaddrp;
+
+       if (!rta)
+               return 0;
+
+       uaddrp = RTA_DATA(rta);
+       p = kmalloc(sizeof(*p), GFP_KERNEL);
+       if (!p)
+               return -ENOMEM;
+
+       memcpy(p, uaddrp, sizeof(*p));
+       *addrpp = p;
+       return 0;
+}
+
 static void copy_from_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
 {
        memcpy(&x->id, &p->id, sizeof(x->id));
@@ -365,7 +386,8 @@ static struct xfrm_state *xfrm_state_construct(struct xfrm_usersa_info *p,
                goto error;
        if ((err = attach_encap_tmpl(&x->encap, xfrma[XFRMA_ENCAP-1])))
                goto error;
-
+       if ((err = attach_one_addr(&x->coaddr, xfrma[XFRMA_COADDR-1])))
+               goto error;
        err = xfrm_init_state(x);
        if (err)
                goto error;
@@ -569,6 +591,10 @@ static int dump_one_state(struct xfrm_state *x, int count, void *ptr)
                uctx->ctx_len = x->security->ctx_len;
                memcpy(uctx + 1, x->security->ctx_str, x->security->ctx_len);
        }
+
+       if (x->coaddr)
+               RTA_PUT(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr);
+
        nlh->nlmsg_len = skb->tail - b;
 out:
        sp->this_idx++;