2 files changed, 250 insertions, 32 deletions

diff --git a/net/ipv4/cipso_ipv4.c b/net/ipv4/cipso_ipv4.c
index 7bc992976d29..039cc1ffe977 100644
--- a/net/ipv4/cipso_ipv4.c
+++ b/net/ipv4/cipso_ipv4.c
@@ -1942,23 +1942,85 @@ socket_setattr_failure:
 }
 
 /**
- * cipso_v4_sock_delattr - Delete the CIPSO option from a socket
- * @sk: the socket
+ * cipso_v4_req_setattr - Add a CIPSO option to a connection request socket
+ * @req: the connection request socket
+ * @doi_def: the CIPSO DOI to use
+ * @secattr: the specific security attributes of the socket
  *
  * Description:
- * Removes the CIPSO option from a socket, if present.
+ * Set the CIPSO option on the given socket using the DOI definition and
+ * security attributes passed to the function.  Returns zero on success and
+ * negative values on failure.
  *
  */
-void cipso_v4_sock_delattr(struct sock *sk)
+int cipso_v4_req_setattr(struct request_sock *req,
+                         const struct cipso_v4_doi *doi_def,
+                         const struct netlbl_lsm_secattr *secattr)
 {
-        u8 hdr_delta;
-        struct ip_options *opt;
-        struct inet_sock *sk_inet;
+        int ret_val = -EPERM;
+        unsigned char *buf = NULL;
+        u32 buf_len;
+        u32 opt_len;
+        struct ip_options *opt = NULL;
+        struct inet_request_sock *req_inet;
 
-        sk_inet = inet_sk(sk);
-        opt = sk_inet->opt;
-        if (opt == NULL || opt->cipso == 0)
-                return;
+        /* We allocate the maximum CIPSO option size here so we are probably
+         * being a little wasteful, but it makes our life _much_ easier later
+         * on and after all we are only talking about 40 bytes. */
+        buf_len = CIPSO_V4_OPT_LEN_MAX;
+        buf = kmalloc(buf_len, GFP_ATOMIC);
+        if (buf == NULL) {
+                ret_val = -ENOMEM;
+                goto req_setattr_failure;
+        }
+
+        ret_val = cipso_v4_genopt(buf, buf_len, doi_def, secattr);
+        if (ret_val < 0)
+                goto req_setattr_failure;
+        buf_len = ret_val;
+
+        /* We can't use ip_options_get() directly because it makes a call to
+         * ip_options_get_alloc() which allocates memory with GFP_KERNEL and
+         * we won't always have CAP_NET_RAW even though we _always_ want to
+         * set the IPOPT_CIPSO option. */
+        opt_len = (buf_len + 3) & ~3;
+        opt = kzalloc(sizeof(*opt) + opt_len, GFP_ATOMIC);
+        if (opt == NULL) {
+                ret_val = -ENOMEM;
+                goto req_setattr_failure;
+        }
+        memcpy(opt->__data, buf, buf_len);
+        opt->optlen = opt_len;
+        opt->cipso = sizeof(struct iphdr);
+        kfree(buf);
+        buf = NULL;
+
+        req_inet = inet_rsk(req);
+        opt = xchg(&req_inet->opt, opt);
+        kfree(opt);
+
+        return 0;
+
+req_setattr_failure:
+        kfree(buf);
+        kfree(opt);
+        return ret_val;
+}
+
+/**
+ * cipso_v4_delopt - Delete the CIPSO option from a set of IP options
+ * @opt_ptr: IP option pointer
+ *
+ * Description:
+ * Deletes the CIPSO IP option from a set of IP options and makes the necessary
+ * adjustments to the IP option structure.  Returns zero on success, negative
+ * values on failure.
+ *
+ */
+int cipso_v4_delopt(struct ip_options **opt_ptr)
+{
+        int hdr_delta = 0;
+        struct ip_options *opt = *opt_ptr;
 
         if (opt->srr || opt->rr || opt->ts || opt->router_alert) {
                 u8 cipso_len;
@@ -2003,11 +2065,34 @@ void cipso_v4_sock_delattr(struct sock *sk)
         } else {
                 /* only the cipso option was present on the socket so we can
                  * remove the entire option struct */
-                sk_inet->opt = NULL;
+                *opt_ptr = NULL;
                 hdr_delta = opt->optlen;
                 kfree(opt);
         }
 
+        return hdr_delta;
+}
+
+/**
+ * cipso_v4_sock_delattr - Delete the CIPSO option from a socket
+ * @sk: the socket
+ *
+ * Description:
+ * Removes the CIPSO option from a socket, if present.
+ *
+ */
+void cipso_v4_sock_delattr(struct sock *sk)
+{
+        int hdr_delta;
+        struct ip_options *opt;
+        struct inet_sock *sk_inet;
+
+        sk_inet = inet_sk(sk);
+        opt = sk_inet->opt;
+        if (opt == NULL || opt->cipso == 0)
+                return;
+
+        hdr_delta = cipso_v4_delopt(&sk_inet->opt);
         if (sk_inet->is_icsk && hdr_delta > 0) {
                 struct inet_connection_sock *sk_conn = inet_csk(sk);
                 sk_conn->icsk_ext_hdr_len -= hdr_delta;
@@ -2016,6 +2101,27 @@ void cipso_v4_sock_delattr(struct sock *sk)
 }
 
 /**
+ * cipso_v4_req_delattr - Delete the CIPSO option from a request socket
+ * @reg: the request socket
+ *
+ * Description:
+ * Removes the CIPSO option from a request socket, if present.
+ *
+ */
+void cipso_v4_req_delattr(struct request_sock *req)
+{
+        struct ip_options *opt;
+        struct inet_request_sock *req_inet;
+
+        req_inet = inet_rsk(req);
+        opt = req_inet->opt;
+        if (opt == NULL || opt->cipso == 0)
+                return;
+
+        cipso_v4_delopt(&req_inet->opt);
+}
+
+/**
  * cipso_v4_getattr - Helper function for the cipso_v4_*_getattr functions
  * @cipso: the CIPSO v4 option
  * @secattr: the security attributes
diff --git a/net/netlabel/netlabel_kapi.c b/net/netlabel/netlabel_kapi.c
index fd9229db075c..cae2f5f4cac0 100644
--- a/net/netlabel/netlabel_kapi.c
+++ b/net/netlabel/netlabel_kapi.c
@@ -619,8 +619,9 @@ int netlbl_enabled(void)
 }
 
 /**
- * netlbl_socket_setattr - Label a socket using the correct protocol
+ * netlbl_sock_setattr - Label a socket using the correct protocol
  * @sk: the socket to label
+ * @family: protocol family
  * @secattr: the security attributes
  *
  * Description:
@@ -633,29 +634,45 @@ int netlbl_enabled(void)
  *
  */
 int netlbl_sock_setattr(struct sock *sk,
+                        u16 family,
                         const struct netlbl_lsm_secattr *secattr)
 {
-        int ret_val = -ENOENT;
+        int ret_val;
         struct netlbl_dom_map *dom_entry;
 
         rcu_read_lock();
         dom_entry = netlbl_domhsh_getentry(secattr->domain);
-        if (dom_entry == NULL)
+        if (dom_entry == NULL) {
+                ret_val = -ENOENT;
                 goto socket_setattr_return;
-        switch (dom_entry->type) {
-        case NETLBL_NLTYPE_ADDRSELECT:
-                ret_val = -EDESTADDRREQ;
-                break;
-        case NETLBL_NLTYPE_CIPSOV4:
-                ret_val = cipso_v4_sock_setattr(sk,
-                                                dom_entry->type_def.cipsov4,
-                                                secattr);
+        }
+        switch (family) {
+        case AF_INET:
+                switch (dom_entry->type) {
+                case NETLBL_NLTYPE_ADDRSELECT:
+                        ret_val = -EDESTADDRREQ;
+                        break;
+                case NETLBL_NLTYPE_CIPSOV4:
+                        ret_val = cipso_v4_sock_setattr(sk,
+                                                    dom_entry->type_def.cipsov4,
+                                                    secattr);
+                        break;
+                case NETLBL_NLTYPE_UNLABELED:
+                        ret_val = 0;
+                        break;
+                default:
+                        ret_val = -ENOENT;
+                }
                 break;
-        case NETLBL_NLTYPE_UNLABELED:
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+        case AF_INET6:
+                /* since we don't support any IPv6 labeling protocols right
+                 * now we can optimize everything away until we do */
                 ret_val = 0;
                 break;
+#endif /* IPv6 */
         default:
-                ret_val = -ENOENT;
+                ret_val = -EPROTONOSUPPORT;
         }
 
 socket_setattr_return:
@@ -689,9 +706,25 @@ void netlbl_sock_delattr(struct sock *sk)
  * on failure.
  *
  */
-int netlbl_sock_getattr(struct sock *sk, struct netlbl_lsm_secattr *secattr)
+int netlbl_sock_getattr(struct sock *sk,
+                        struct netlbl_lsm_secattr *secattr)
 {
-        return cipso_v4_sock_getattr(sk, secattr);
+        int ret_val;
+
+        switch (sk->sk_family) {
+        case AF_INET:
+                ret_val = cipso_v4_sock_getattr(sk, secattr);
+                break;
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+        case AF_INET6:
+                ret_val = -ENOMSG;
+                break;
+#endif /* IPv6 */
+        default:
+                ret_val = -EPROTONOSUPPORT;
+        }
+
+        return ret_val;
 }
 
 /**
@@ -748,7 +781,7 @@ int netlbl_conn_setattr(struct sock *sk,
                 break;
 #endif /* IPv6 */
         default:
-                ret_val = 0;
+                ret_val = -EPROTONOSUPPORT;
         }
 
 conn_setattr_return:
@@ -757,6 +790,77 @@ conn_setattr_return:
 }
 
 /**
+ * netlbl_req_setattr - Label a request socket using the correct protocol
+ * @req: the request socket to label
+ * @secattr: the security attributes
+ *
+ * Description:
+ * Attach the correct label to the given socket using the security attributes
+ * specified in @secattr.  Returns zero on success, negative values on failure.
+ *
+ */
+int netlbl_req_setattr(struct request_sock *req,
+                       const struct netlbl_lsm_secattr *secattr)
+{
+        int ret_val;
+        struct netlbl_dom_map *dom_entry;
+        struct netlbl_domaddr4_map *af4_entry;
+        u32 proto_type;
+        struct cipso_v4_doi *proto_cv4;
+
+        rcu_read_lock();
+        dom_entry = netlbl_domhsh_getentry(secattr->domain);
+        if (dom_entry == NULL) {
+                ret_val = -ENOENT;
+                goto req_setattr_return;
+        }
+        switch (req->rsk_ops->family) {
+        case AF_INET:
+                if (dom_entry->type == NETLBL_NLTYPE_ADDRSELECT) {
+                        struct inet_request_sock *req_inet = inet_rsk(req);
+                        af4_entry = netlbl_domhsh_getentry_af4(secattr->domain,
+                                                            req_inet->rmt_addr);
+                        if (af4_entry == NULL) {
+                                ret_val = -ENOENT;
+                                goto req_setattr_return;
+                        }
+                        proto_type = af4_entry->type;
+                        proto_cv4 = af4_entry->type_def.cipsov4;
+                } else {
+                        proto_type = dom_entry->type;
+                        proto_cv4 = dom_entry->type_def.cipsov4;
+                }
+                switch (proto_type) {
+                case NETLBL_NLTYPE_CIPSOV4:
+                        ret_val = cipso_v4_req_setattr(req, proto_cv4, secattr);
+                        break;
+                case NETLBL_NLTYPE_UNLABELED:
+                        /* just delete the protocols we support for right now
+                         * but we could remove other protocols if needed */
+                        cipso_v4_req_delattr(req);
+                        ret_val = 0;
+                        break;
+                default:
+                        ret_val = -ENOENT;
+                }
+                break;
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+        case AF_INET6:
+                /* since we don't support any IPv6 labeling protocols right
+                 * now we can optimize everything away until we do */
+                ret_val = 0;
+                break;
+#endif /* IPv6 */
+        default:
+                ret_val = -EPROTONOSUPPORT;
+        }
+
+req_setattr_return:
+        rcu_read_unlock();
+        return ret_val;
+}
+
+/**
  * netlbl_skbuff_setattr - Label a packet using the correct protocol
  * @skb: the packet
  * @family: protocol family
@@ -808,7 +912,7 @@ int netlbl_skbuff_setattr(struct sk_buff *skb,
                 break;
 #endif /* IPv6 */
         default:
-                ret_val = 0;
+                ret_val = -EPROTONOSUPPORT;
         }
 
 skbuff_setattr_return:
@@ -833,9 +937,17 @@ int netlbl_skbuff_getattr(const struct sk_buff *skb,
                           u16 family,
                           struct netlbl_lsm_secattr *secattr)
 {
-        if (CIPSO_V4_OPTEXIST(skb) &&
-            cipso_v4_skbuff_getattr(skb, secattr) == 0)
-                return 0;
+        switch (family) {
+        case AF_INET:
+                if (CIPSO_V4_OPTEXIST(skb) &&
+                    cipso_v4_skbuff_getattr(skb, secattr) == 0)
+                        return 0;
+                break;
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+        case AF_INET6:
+                break;
+#endif /* IPv6 */
+        }
 
         return netlbl_unlabel_getattr(skb, family, secattr);
 }