int cipso_v4_doi_add(struct cipso_v4_doi *doi_def);
int cipso_v4_doi_remove(u32 doi, void (*callback) (struct rcu_head * head));
struct cipso_v4_doi *cipso_v4_doi_getdef(u32 doi);
-struct sk_buff *cipso_v4_doi_dump_all(size_t headroom);
-struct sk_buff *cipso_v4_doi_dump(u32 doi, size_t headroom);
+int cipso_v4_doi_walk(u32 *skip_cnt,
+ int (*callback) (struct cipso_v4_doi *doi_def, void *arg),
+ void *cb_arg);
int cipso_v4_doi_domhsh_add(struct cipso_v4_doi *doi_def, const char *domain);
int cipso_v4_doi_domhsh_remove(struct cipso_v4_doi *doi_def,
const char *domain);
return NULL;
}
-static inline struct sk_buff *cipso_v4_doi_dump_all(size_t headroom)
+static inline int cipso_v4_doi_walk(u32 *skip_cnt,
+ int (*callback) (struct cipso_v4_doi *doi_def, void *arg),
+ void *cb_arg)
{
- return NULL;
-}
-
-static inline struct sk_buff *cipso_v4_doi_dump(u32 doi, size_t headroom)
-{
- return NULL;
+ return 0;
}
static inline int cipso_v4_doi_domhsh_add(struct cipso_v4_doi *doi_def,
* The payload is dependent on the subsystem specified in the
* 'nlmsghdr->nlmsg_type' and should be defined below, supporting functions
* should be defined in the corresponding net/netlabel/netlabel_<subsys>.h|c
- * file. All of the fields in the NetLabel payload are NETLINK attributes, the
- * length of each field is the length of the NETLINK attribute payload, see
- * include/net/netlink.h for more information on NETLINK attributes.
+ * file. All of the fields in the NetLabel payload are NETLINK attributes, see
+ * the include/net/netlink.h file for more information on NETLINK attributes.
*
*/
#define NETLBL_NLTYPE_UNLABELED 5
#define NETLBL_NLTYPE_UNLABELED_NAME "NLBL_UNLBL"
-/* NetLabel return codes */
-#define NETLBL_E_OK 0
-
-/*
- * Helper functions
- */
-
-#define NETLBL_LEN_U8 nla_total_size(sizeof(u8))
-#define NETLBL_LEN_U16 nla_total_size(sizeof(u16))
-#define NETLBL_LEN_U32 nla_total_size(sizeof(u32))
-
-/**
- * netlbl_netlink_alloc_skb - Allocate a NETLINK message buffer
- * @head: the amount of headroom in bytes
- * @body: the desired size (minus headroom) in bytes
- * @gfp_flags: the alloc flags to pass to alloc_skb()
- *
- * Description:
- * Allocate a NETLINK message buffer based on the sizes given in @head and
- * @body. If @head is greater than zero skb_reserve() is called to reserve
- * @head bytes at the start of the buffer. Returns a valid sk_buff pointer on
- * success, NULL on failure.
- *
- */
-static inline struct sk_buff *netlbl_netlink_alloc_skb(size_t head,
- size_t body,
- gfp_t gfp_flags)
-{
- struct sk_buff *skb;
-
- skb = alloc_skb(NLMSG_ALIGN(head + body), gfp_flags);
- if (skb == NULL)
- return NULL;
- if (head > 0) {
- skb_reserve(skb, head);
- if (skb_tailroom(skb) < body) {
- kfree_skb(skb);
- return NULL;
- }
- }
-
- return skb;
-}
-
/*
* NetLabel - Kernel API for accessing the network packet label mappings.
*
}
/**
- * cipso_v4_doi_dump_all - Dump all the CIPSO DOI definitions into a sk_buff
- * @headroom: the amount of headroom to allocate for the sk_buff
+ * cipso_v4_doi_walk - Iterate through the DOI definitions
+ * @skip_cnt: skip past this number of DOI definitions, updated
+ * @callback: callback for each DOI definition
+ * @cb_arg: argument for the callback function
*
* Description:
- * Dump a list of all the configured DOI values into a sk_buff. The returned
- * sk_buff has room at the front of the sk_buff for @headroom bytes. See
- * net/netlabel/netlabel_cipso_v4.h for the LISTALL message format. This
- * function may fail if another process is changing the DOI list at the same
- * time. Returns a pointer to a sk_buff on success, NULL on error.
+ * Iterate over the DOI definition list, skipping the first @skip_cnt entries.
+ * For each entry call @callback, if @callback returns a negative value stop
+ * 'walking' through the list and return. Updates the value in @skip_cnt upon
+ * return. Returns zero on success, negative values on failure.
*
*/
-struct sk_buff *cipso_v4_doi_dump_all(size_t headroom)
+int cipso_v4_doi_walk(u32 *skip_cnt,
+ int (*callback) (struct cipso_v4_doi *doi_def, void *arg),
+ void *cb_arg)
{
- struct sk_buff *skb = NULL;
- struct cipso_v4_doi *iter;
+ int ret_val = -ENOENT;
u32 doi_cnt = 0;
- ssize_t buf_len;
-
- buf_len = NETLBL_LEN_U32;
- rcu_read_lock();
- list_for_each_entry_rcu(iter, &cipso_v4_doi_list, list)
- if (iter->valid) {
- doi_cnt += 1;
- buf_len += 2 * NETLBL_LEN_U32;
- }
-
- skb = netlbl_netlink_alloc_skb(headroom, buf_len, GFP_ATOMIC);
- if (skb == NULL)
- goto doi_dump_all_failure;
-
- if (nla_put_u32(skb, NLA_U32, doi_cnt) != 0)
- goto doi_dump_all_failure;
- buf_len -= NETLBL_LEN_U32;
- list_for_each_entry_rcu(iter, &cipso_v4_doi_list, list)
- if (iter->valid) {
- if (buf_len < 2 * NETLBL_LEN_U32)
- goto doi_dump_all_failure;
- if (nla_put_u32(skb, NLA_U32, iter->doi) != 0)
- goto doi_dump_all_failure;
- if (nla_put_u32(skb, NLA_U32, iter->type) != 0)
- goto doi_dump_all_failure;
- buf_len -= 2 * NETLBL_LEN_U32;
- }
- rcu_read_unlock();
-
- return skb;
-
-doi_dump_all_failure:
- rcu_read_unlock();
- kfree(skb);
- return NULL;
-}
-
-/**
- * cipso_v4_doi_dump - Dump a CIPSO DOI definition into a sk_buff
- * @doi: the DOI value
- * @headroom: the amount of headroom to allocate for the sk_buff
- *
- * Description:
- * Lookup the DOI definition matching @doi and dump it's contents into a
- * sk_buff. The returned sk_buff has room at the front of the sk_buff for
- * @headroom bytes. See net/netlabel/netlabel_cipso_v4.h for the LIST message
- * format. This function may fail if another process is changing the DOI list
- * at the same time. Returns a pointer to a sk_buff on success, NULL on error.
- *
- */
-struct sk_buff *cipso_v4_doi_dump(u32 doi, size_t headroom)
-{
- struct sk_buff *skb = NULL;
- struct cipso_v4_doi *iter;
- u32 tag_cnt = 0;
- u32 lvl_cnt = 0;
- u32 cat_cnt = 0;
- ssize_t buf_len;
- ssize_t tmp;
+ struct cipso_v4_doi *iter_doi;
rcu_read_lock();
- iter = cipso_v4_doi_getdef(doi);
- if (iter == NULL)
- goto doi_dump_failure;
- buf_len = NETLBL_LEN_U32;
- switch (iter->type) {
- case CIPSO_V4_MAP_PASS:
- buf_len += NETLBL_LEN_U32;
- while(tag_cnt < CIPSO_V4_TAG_MAXCNT &&
- iter->tags[tag_cnt] != CIPSO_V4_TAG_INVALID) {
- tag_cnt += 1;
- buf_len += NETLBL_LEN_U8;
- }
- break;
- case CIPSO_V4_MAP_STD:
- buf_len += 3 * NETLBL_LEN_U32;
- while (tag_cnt < CIPSO_V4_TAG_MAXCNT &&
- iter->tags[tag_cnt] != CIPSO_V4_TAG_INVALID) {
- tag_cnt += 1;
- buf_len += NETLBL_LEN_U8;
- }
- for (tmp = 0; tmp < iter->map.std->lvl.local_size; tmp++)
- if (iter->map.std->lvl.local[tmp] !=
- CIPSO_V4_INV_LVL) {
- lvl_cnt += 1;
- buf_len += NETLBL_LEN_U32 + NETLBL_LEN_U8;
+ list_for_each_entry_rcu(iter_doi, &cipso_v4_doi_list, list)
+ if (iter_doi->valid) {
+ if (doi_cnt++ < *skip_cnt)
+ continue;
+ ret_val = callback(iter_doi, cb_arg);
+ if (ret_val < 0) {
+ doi_cnt--;
+ goto doi_walk_return;
}
- for (tmp = 0; tmp < iter->map.std->cat.local_size; tmp++)
- if (iter->map.std->cat.local[tmp] !=
- CIPSO_V4_INV_CAT) {
- cat_cnt += 1;
- buf_len += NETLBL_LEN_U32 + NETLBL_LEN_U16;
- }
- break;
- }
-
- skb = netlbl_netlink_alloc_skb(headroom, buf_len, GFP_ATOMIC);
- if (skb == NULL)
- goto doi_dump_failure;
-
- if (nla_put_u32(skb, NLA_U32, iter->type) != 0)
- goto doi_dump_failure;
- buf_len -= NETLBL_LEN_U32;
- if (iter != cipso_v4_doi_getdef(doi))
- goto doi_dump_failure;
- switch (iter->type) {
- case CIPSO_V4_MAP_PASS:
- if (nla_put_u32(skb, NLA_U32, tag_cnt) != 0)
- goto doi_dump_failure;
- buf_len -= NETLBL_LEN_U32;
- for (tmp = 0;
- tmp < CIPSO_V4_TAG_MAXCNT &&
- iter->tags[tmp] != CIPSO_V4_TAG_INVALID;
- tmp++) {
- if (buf_len < NETLBL_LEN_U8)
- goto doi_dump_failure;
- if (nla_put_u8(skb, NLA_U8, iter->tags[tmp]) != 0)
- goto doi_dump_failure;
- buf_len -= NETLBL_LEN_U8;
}
- break;
- case CIPSO_V4_MAP_STD:
- if (nla_put_u32(skb, NLA_U32, tag_cnt) != 0)
- goto doi_dump_failure;
- if (nla_put_u32(skb, NLA_U32, lvl_cnt) != 0)
- goto doi_dump_failure;
- if (nla_put_u32(skb, NLA_U32, cat_cnt) != 0)
- goto doi_dump_failure;
- buf_len -= 3 * NETLBL_LEN_U32;
- for (tmp = 0;
- tmp < CIPSO_V4_TAG_MAXCNT &&
- iter->tags[tmp] != CIPSO_V4_TAG_INVALID;
- tmp++) {
- if (buf_len < NETLBL_LEN_U8)
- goto doi_dump_failure;
- if (nla_put_u8(skb, NLA_U8, iter->tags[tmp]) != 0)
- goto doi_dump_failure;
- buf_len -= NETLBL_LEN_U8;
- }
- for (tmp = 0; tmp < iter->map.std->lvl.local_size; tmp++)
- if (iter->map.std->lvl.local[tmp] !=
- CIPSO_V4_INV_LVL) {
- if (buf_len < NETLBL_LEN_U32 + NETLBL_LEN_U8)
- goto doi_dump_failure;
- if (nla_put_u32(skb, NLA_U32, tmp) != 0)
- goto doi_dump_failure;
- if (nla_put_u8(skb,
- NLA_U8,
- iter->map.std->lvl.local[tmp]) != 0)
- goto doi_dump_failure;
- buf_len -= NETLBL_LEN_U32 + NETLBL_LEN_U8;
- }
- for (tmp = 0; tmp < iter->map.std->cat.local_size; tmp++)
- if (iter->map.std->cat.local[tmp] !=
- CIPSO_V4_INV_CAT) {
- if (buf_len < NETLBL_LEN_U32 + NETLBL_LEN_U16)
- goto doi_dump_failure;
- if (nla_put_u32(skb, NLA_U32, tmp) != 0)
- goto doi_dump_failure;
- if (nla_put_u16(skb,
- NLA_U16,
- iter->map.std->cat.local[tmp]) != 0)
- goto doi_dump_failure;
- buf_len -= NETLBL_LEN_U32 + NETLBL_LEN_U16;
- }
- break;
- }
- rcu_read_unlock();
-
- return skb;
-doi_dump_failure:
+doi_walk_return:
rcu_read_unlock();
- kfree(skb);
- return NULL;
+ *skip_cnt = doi_cnt;
+ return ret_val;
}
/**
}
/**
- * netlbl_domhsh_dump - Dump the domain hash table into a sk_buff
+ * netlbl_domhsh_walk - Iterate through the domain mapping hash table
+ * @skip_bkt: the number of buckets to skip at the start
+ * @skip_chain: the number of entries to skip in the first iterated bucket
+ * @callback: callback for each entry
+ * @cb_arg: argument for the callback function
*
* Description:
- * Dump the domain hash table into a buffer suitable for returning to an
- * application in response to a NetLabel management DOMAIN message. This
- * function may fail if another process is growing the hash table at the same
- * time. The returned sk_buff has room at the front of the sk_buff for
- * @headroom bytes. See netlabel.h for the DOMAIN message format. Returns a
- * pointer to a sk_buff on success, NULL on error.
+ * Interate over the domain mapping hash table, skipping the first @skip_bkt
+ * buckets and @skip_chain entries. For each entry in the table call
+ * @callback, if @callback returns a negative value stop 'walking' through the
+ * table and return. Updates the values in @skip_bkt and @skip_chain on
+ * return. Returns zero on succcess, negative values on failure.
*
*/
-struct sk_buff *netlbl_domhsh_dump(size_t headroom)
+int netlbl_domhsh_walk(u32 *skip_bkt,
+ u32 *skip_chain,
+ int (*callback) (struct netlbl_dom_map *entry, void *arg),
+ void *cb_arg)
{
- struct sk_buff *skb = NULL;
- ssize_t buf_len;
- u32 bkt_iter;
- u32 dom_cnt = 0;
- struct netlbl_domhsh_tbl *hsh_tbl;
- struct netlbl_dom_map *list_iter;
- ssize_t tmp_len;
+ int ret_val = -ENOENT;
+ u32 iter_bkt;
+ struct netlbl_dom_map *iter_entry;
+ u32 chain_cnt = 0;
- buf_len = NETLBL_LEN_U32;
rcu_read_lock();
- hsh_tbl = rcu_dereference(netlbl_domhsh);
- for (bkt_iter = 0; bkt_iter < hsh_tbl->size; bkt_iter++)
- list_for_each_entry_rcu(list_iter,
- &hsh_tbl->tbl[bkt_iter], list) {
- buf_len += NETLBL_LEN_U32 +
- nla_total_size(strlen(list_iter->domain) + 1);
- switch (list_iter->type) {
- case NETLBL_NLTYPE_UNLABELED:
- break;
- case NETLBL_NLTYPE_CIPSOV4:
- buf_len += 2 * NETLBL_LEN_U32;
- break;
- }
- dom_cnt++;
- }
-
- skb = netlbl_netlink_alloc_skb(headroom, buf_len, GFP_ATOMIC);
- if (skb == NULL)
- goto dump_failure;
-
- if (nla_put_u32(skb, NLA_U32, dom_cnt) != 0)
- goto dump_failure;
- buf_len -= NETLBL_LEN_U32;
- hsh_tbl = rcu_dereference(netlbl_domhsh);
- for (bkt_iter = 0; bkt_iter < hsh_tbl->size; bkt_iter++)
- list_for_each_entry_rcu(list_iter,
- &hsh_tbl->tbl[bkt_iter], list) {
- tmp_len = nla_total_size(strlen(list_iter->domain) +
- 1);
- if (buf_len < NETLBL_LEN_U32 + tmp_len)
- goto dump_failure;
- if (nla_put_string(skb,
- NLA_STRING,
- list_iter->domain) != 0)
- goto dump_failure;
- if (nla_put_u32(skb, NLA_U32, list_iter->type) != 0)
- goto dump_failure;
- buf_len -= NETLBL_LEN_U32 + tmp_len;
- switch (list_iter->type) {
- case NETLBL_NLTYPE_UNLABELED:
- break;
- case NETLBL_NLTYPE_CIPSOV4:
- if (buf_len < 2 * NETLBL_LEN_U32)
- goto dump_failure;
- if (nla_put_u32(skb,
- NLA_U32,
- list_iter->type_def.cipsov4->type) != 0)
- goto dump_failure;
- if (nla_put_u32(skb,
- NLA_U32,
- list_iter->type_def.cipsov4->doi) != 0)
- goto dump_failure;
- buf_len -= 2 * NETLBL_LEN_U32;
- break;
+ for (iter_bkt = *skip_bkt;
+ iter_bkt < rcu_dereference(netlbl_domhsh)->size;
+ iter_bkt++, chain_cnt = 0) {
+ list_for_each_entry_rcu(iter_entry,
+ &netlbl_domhsh->tbl[iter_bkt],
+ list)
+ if (iter_entry->valid) {
+ if (chain_cnt++ < *skip_chain)
+ continue;
+ ret_val = callback(iter_entry, cb_arg);
+ if (ret_val < 0) {
+ chain_cnt--;
+ goto walk_return;
+ }
}
- }
- rcu_read_unlock();
-
- return skb;
-
-dump_failure:
- rcu_read_unlock();
- kfree_skb(skb);
- return NULL;
-}
-
-/**
- * netlbl_domhsh_dump_default - Dump the default domain mapping into a sk_buff
- *
- * Description:
- * Dump the default domain mapping into a buffer suitable for returning to an
- * application in response to a NetLabel management DEFDOMAIN message. This
- * function may fail if another process is changing the default domain mapping
- * at the same time. The returned sk_buff has room at the front of the
- * skb_buff for @headroom bytes. See netlabel.h for the DEFDOMAIN message
- * format. Returns a pointer to a sk_buff on success, NULL on error.
- *
- */
-struct sk_buff *netlbl_domhsh_dump_default(size_t headroom)
-{
- struct sk_buff *skb;
- ssize_t buf_len;
- struct netlbl_dom_map *entry;
-
- buf_len = NETLBL_LEN_U32;
- rcu_read_lock();
- entry = rcu_dereference(netlbl_domhsh_def);
- if (entry != NULL)
- switch (entry->type) {
- case NETLBL_NLTYPE_UNLABELED:
- break;
- case NETLBL_NLTYPE_CIPSOV4:
- buf_len += 2 * NETLBL_LEN_U32;
- break;
- }
-
- skb = netlbl_netlink_alloc_skb(headroom, buf_len, GFP_ATOMIC);
- if (skb == NULL)
- goto dump_default_failure;
-
- if (entry != rcu_dereference(netlbl_domhsh_def))
- goto dump_default_failure;
- if (entry != NULL) {
- if (nla_put_u32(skb, NLA_U32, entry->type) != 0)
- goto dump_default_failure;
- buf_len -= NETLBL_LEN_U32;
- switch (entry->type) {
- case NETLBL_NLTYPE_UNLABELED:
- break;
- case NETLBL_NLTYPE_CIPSOV4:
- if (buf_len < 2 * NETLBL_LEN_U32)
- goto dump_default_failure;
- if (nla_put_u32(skb,
- NLA_U32,
- entry->type_def.cipsov4->type) != 0)
- goto dump_default_failure;
- if (nla_put_u32(skb,
- NLA_U32,
- entry->type_def.cipsov4->doi) != 0)
- goto dump_default_failure;
- buf_len -= 2 * NETLBL_LEN_U32;
- break;
- }
- } else
- nla_put_u32(skb, NLA_U32, NETLBL_NLTYPE_NONE);
- rcu_read_unlock();
-
- return skb;
+ }
-dump_default_failure:
+walk_return:
rcu_read_unlock();
- kfree_skb(skb);
- return NULL;
+ *skip_bkt = iter_bkt;
+ *skip_chain = chain_cnt;
+ return ret_val;
}
int netlbl_domhsh_add_default(struct netlbl_dom_map *entry);
int netlbl_domhsh_remove_default(void);
struct netlbl_dom_map *netlbl_domhsh_getentry(const char *domain);
-struct sk_buff *netlbl_domhsh_dump(size_t headroom);
-struct sk_buff *netlbl_domhsh_dump_default(size_t headroom);
+int netlbl_domhsh_walk(u32 *skip_bkt,
+ u32 *skip_chain,
+ int (*callback) (struct netlbl_dom_map *entry, void *arg),
+ void *cb_arg);
#endif
return 0;
}
-
-/*
- * NetLabel Common Protocol Functions
- */
-
-/**
- * netlbl_netlink_send_ack - Send an ACK message
- * @info: the generic NETLINK information
- * @genl_family: the generic NETLINK family ID value
- * @ack_cmd: the generic NETLINK family ACK command value
- * @ret_code: return code to use
- *
- * Description:
- * This function sends an ACK message to the sender of the NETLINK message
- * specified by @info.
- *
- */
-void netlbl_netlink_send_ack(const struct genl_info *info,
- u32 genl_family,
- u8 ack_cmd,
- u32 ret_code)
-{
- size_t data_size;
- struct sk_buff *skb;
-
- data_size = GENL_HDRLEN + 2 * NETLBL_LEN_U32;
- skb = netlbl_netlink_alloc_skb(0, data_size, GFP_KERNEL);
- if (skb == NULL)
- return;
-
- if (netlbl_netlink_hdr_put(skb,
- info->snd_pid,
- 0,
- genl_family,
- ack_cmd) == NULL)
- goto send_ack_failure;
-
- if (nla_put_u32(skb, NLA_U32, info->snd_seq) != 0)
- goto send_ack_failure;
- if (nla_put_u32(skb, NLA_U32, ret_code) != 0)
- goto send_ack_failure;
-
- netlbl_netlink_snd(skb, info->snd_pid);
- return;
-
-send_ack_failure:
- kfree_skb(skb);
-}
-
-/*
- * NETLINK I/O Functions
- */
-
-/**
- * netlbl_netlink_snd - Send a NetLabel message
- * @skb: NetLabel message
- * @pid: destination PID
- *
- * Description:
- * Sends a unicast NetLabel message over the NETLINK socket.
- *
- */
-int netlbl_netlink_snd(struct sk_buff *skb, u32 pid)
-{
- return genlmsg_unicast(skb, pid);
-}
-
-/**
- * netlbl_netlink_snd - Send a NetLabel message
- * @skb: NetLabel message
- * @pid: sending PID
- * @group: multicast group id
- *
- * Description:
- * Sends a multicast NetLabel message over the NETLINK socket to all members
- * of @group except @pid.
- *
- */
-int netlbl_netlink_snd_multicast(struct sk_buff *skb, u32 pid, u32 group)
-{
- return genlmsg_multicast(skb, pid, group, GFP_KERNEL);
-}
/* NetLabel NETLINK helper functions */
-/**
- * netlbl_netlink_cap_check - Check the NETLINK msg capabilities
- * @skb: the NETLINK buffer
- * @req_cap: the required capability
- *
- * Description:
- * Check the NETLINK buffer's capabilities against the required capabilities.
- * Returns zero on success, negative values on failure.
- *
- */
-static inline int netlbl_netlink_cap_check(const struct sk_buff *skb,
- kernel_cap_t req_cap)
-{
- if (cap_raised(NETLINK_CB(skb).eff_cap, req_cap))
- return 0;
- return -EPERM;
-}
-
-/**
- * netlbl_getinc_u8 - Read a u8 value from a nlattr stream and move on
- * @nla: the attribute
- * @rem_len: remaining length
- *
- * Description:
- * Return a u8 value pointed to by @nla and advance it to the next attribute.
- *
- */
-static inline u8 netlbl_getinc_u8(struct nlattr **nla, int *rem_len)
-{
- u8 val = nla_get_u8(*nla);
- *nla = nla_next(*nla, rem_len);
- return val;
-}
-
-/**
- * netlbl_getinc_u16 - Read a u16 value from a nlattr stream and move on
- * @nla: the attribute
- * @rem_len: remaining length
- *
- * Description:
- * Return a u16 value pointed to by @nla and advance it to the next attribute.
- *
- */
-static inline u16 netlbl_getinc_u16(struct nlattr **nla, int *rem_len)
-{
- u16 val = nla_get_u16(*nla);
- *nla = nla_next(*nla, rem_len);
- return val;
-}
-
-/**
- * netlbl_getinc_u32 - Read a u32 value from a nlattr stream and move on
- * @nla: the attribute
- * @rem_len: remaining length
- *
- * Description:
- * Return a u32 value pointed to by @nla and advance it to the next attribute.
- *
- */
-static inline u32 netlbl_getinc_u32(struct nlattr **nla, int *rem_len)
-{
- u32 val = nla_get_u32(*nla);
- *nla = nla_next(*nla, rem_len);
- return val;
-}
-
/**
* netlbl_netlink_hdr_put - Write the NETLINK buffers into a sk_buff
* @skb: the packet
u32 pid,
u32 seq,
int type,
+ int flags,
u8 cmd)
{
return genlmsg_put(skb,
seq,
type,
0,
- 0,
+ flags,
cmd,
NETLBL_PROTO_VERSION);
}
-/**
- * netlbl_netlink_hdr_push - Write the NETLINK buffers into a sk_buff
- * @skb: the packet
- * @pid: the PID of the receipient
- * @seq: the sequence number
- * @type: the generic NETLINK message family type
- * @cmd: command
- *
- * Description:
- * Write both a NETLINK nlmsghdr structure and a Generic NETLINK genlmsghdr
- * struct to the packet.
- *
- */
-static inline void netlbl_netlink_hdr_push(struct sk_buff *skb,
- u32 pid,
- u32 seq,
- int type,
- u8 cmd)
-
-{
- struct nlmsghdr *nlh;
- struct genlmsghdr *hdr;
-
- nlh = (struct nlmsghdr *)skb_push(skb, NLMSG_SPACE(GENL_HDRLEN));
- nlh->nlmsg_type = type;
- nlh->nlmsg_len = skb->len;
- nlh->nlmsg_flags = 0;
- nlh->nlmsg_pid = pid;
- nlh->nlmsg_seq = seq;
-
- hdr = nlmsg_data(nlh);
- hdr->cmd = cmd;
- hdr->version = NETLBL_PROTO_VERSION;
- hdr->reserved = 0;
-}
-
-/**
- * netlbl_netlink_payload_len - Return the length of the payload
- * @skb: the NETLINK buffer
- *
- * Description:
- * This function returns the length of the NetLabel payload.
- *
- */
-static inline u32 netlbl_netlink_payload_len(const struct sk_buff *skb)
-{
- return nlmsg_len((struct nlmsghdr *)skb->data) - GENL_HDRLEN;
-}
-
-/**
- * netlbl_netlink_payload_data - Returns a pointer to the start of the payload
- * @skb: the NETLINK buffer
- *
- * Description:
- * This function returns a pointer to the start of the NetLabel payload.
- *
- */
-static inline void *netlbl_netlink_payload_data(const struct sk_buff *skb)
-{
- return (unsigned char *)nlmsg_data((struct nlmsghdr *)skb->data) +
- GENL_HDRLEN;
-}
-
-/* NetLabel common protocol functions */
-
-void netlbl_netlink_send_ack(const struct genl_info *info,
- u32 genl_family,
- u8 ack_cmd,
- u32 ret_code);
-
/* NetLabel NETLINK I/O functions */
int netlbl_netlink_init(void);
-int netlbl_netlink_snd(struct sk_buff *skb, u32 pid);
-int netlbl_netlink_snd_multicast(struct sk_buff *skb, u32 pid, u32 group);
#endif
projects / linux-2.6 / commitdiff