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- #include <linux/types.h>
- #include <linux/socket.h>
- #include <linux/string.h>
- #include <linux/skbuff.h>
- #include <linux/audit.h>
- #include <linux/slab.h>
- #include <net/sock.h>
- #include <net/netlink.h>
- #include <net/genetlink.h>
- #include <net/netlabel.h>
- #include <net/calipso.h>
- #include <linux/atomic.h>
- #include "netlabel_user.h"
- #include "netlabel_calipso.h"
- #include "netlabel_mgmt.h"
- #include "netlabel_domainhash.h"
- struct netlbl_calipso_doiwalk_arg {
- struct netlink_callback *nl_cb;
- struct sk_buff *skb;
- u32 seq;
- };
- struct netlbl_domhsh_walk_arg {
- struct netlbl_audit *audit_info;
- u32 doi;
- };
- static struct genl_family netlbl_calipso_gnl_family = {
- .id = GENL_ID_GENERATE,
- .hdrsize = 0,
- .name = NETLBL_NLTYPE_CALIPSO_NAME,
- .version = NETLBL_PROTO_VERSION,
- .maxattr = NLBL_CALIPSO_A_MAX,
- };
- static const struct nla_policy calipso_genl_policy[NLBL_CALIPSO_A_MAX + 1] = {
- [NLBL_CALIPSO_A_DOI] = { .type = NLA_U32 },
- [NLBL_CALIPSO_A_MTYPE] = { .type = NLA_U32 },
- };
- static int netlbl_calipso_add_pass(struct genl_info *info,
- struct netlbl_audit *audit_info)
- {
- int ret_val;
- struct calipso_doi *doi_def = NULL;
- doi_def = kmalloc(sizeof(*doi_def), GFP_KERNEL);
- if (!doi_def)
- return -ENOMEM;
- doi_def->type = CALIPSO_MAP_PASS;
- doi_def->doi = nla_get_u32(info->attrs[NLBL_CALIPSO_A_DOI]);
- ret_val = calipso_doi_add(doi_def, audit_info);
- if (ret_val != 0)
- calipso_doi_free(doi_def);
- return ret_val;
- }
- static int netlbl_calipso_add(struct sk_buff *skb, struct genl_info *info)
- {
- int ret_val = -EINVAL;
- struct netlbl_audit audit_info;
- if (!info->attrs[NLBL_CALIPSO_A_DOI] ||
- !info->attrs[NLBL_CALIPSO_A_MTYPE])
- return -EINVAL;
- netlbl_netlink_auditinfo(skb, &audit_info);
- switch (nla_get_u32(info->attrs[NLBL_CALIPSO_A_MTYPE])) {
- case CALIPSO_MAP_PASS:
- ret_val = netlbl_calipso_add_pass(info, &audit_info);
- break;
- }
- if (ret_val == 0)
- atomic_inc(&netlabel_mgmt_protocount);
- return ret_val;
- }
- static int netlbl_calipso_list(struct sk_buff *skb, struct genl_info *info)
- {
- int ret_val;
- struct sk_buff *ans_skb = NULL;
- void *data;
- u32 doi;
- struct calipso_doi *doi_def;
- if (!info->attrs[NLBL_CALIPSO_A_DOI]) {
- ret_val = -EINVAL;
- goto list_failure;
- }
- doi = nla_get_u32(info->attrs[NLBL_CALIPSO_A_DOI]);
- doi_def = calipso_doi_getdef(doi);
- if (!doi_def) {
- ret_val = -EINVAL;
- goto list_failure;
- }
- ans_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
- if (!ans_skb) {
- ret_val = -ENOMEM;
- goto list_failure_put;
- }
- data = genlmsg_put_reply(ans_skb, info, &netlbl_calipso_gnl_family,
- 0, NLBL_CALIPSO_C_LIST);
- if (!data) {
- ret_val = -ENOMEM;
- goto list_failure_put;
- }
- ret_val = nla_put_u32(ans_skb, NLBL_CALIPSO_A_MTYPE, doi_def->type);
- if (ret_val != 0)
- goto list_failure_put;
- calipso_doi_putdef(doi_def);
- genlmsg_end(ans_skb, data);
- return genlmsg_reply(ans_skb, info);
- list_failure_put:
- calipso_doi_putdef(doi_def);
- list_failure:
- kfree_skb(ans_skb);
- return ret_val;
- }
- static int netlbl_calipso_listall_cb(struct calipso_doi *doi_def, void *arg)
- {
- int ret_val = -ENOMEM;
- struct netlbl_calipso_doiwalk_arg *cb_arg = arg;
- void *data;
- data = genlmsg_put(cb_arg->skb, NETLINK_CB(cb_arg->nl_cb->skb).portid,
- cb_arg->seq, &netlbl_calipso_gnl_family,
- NLM_F_MULTI, NLBL_CALIPSO_C_LISTALL);
- if (!data)
- goto listall_cb_failure;
- ret_val = nla_put_u32(cb_arg->skb, NLBL_CALIPSO_A_DOI, doi_def->doi);
- if (ret_val != 0)
- goto listall_cb_failure;
- ret_val = nla_put_u32(cb_arg->skb,
- NLBL_CALIPSO_A_MTYPE,
- doi_def->type);
- if (ret_val != 0)
- goto listall_cb_failure;
- genlmsg_end(cb_arg->skb, data);
- return 0;
- listall_cb_failure:
- genlmsg_cancel(cb_arg->skb, data);
- return ret_val;
- }
- static int netlbl_calipso_listall(struct sk_buff *skb,
- struct netlink_callback *cb)
- {
- struct netlbl_calipso_doiwalk_arg cb_arg;
- u32 doi_skip = cb->args[0];
- cb_arg.nl_cb = cb;
- cb_arg.skb = skb;
- cb_arg.seq = cb->nlh->nlmsg_seq;
- calipso_doi_walk(&doi_skip, netlbl_calipso_listall_cb, &cb_arg);
- cb->args[0] = doi_skip;
- return skb->len;
- }
- static int netlbl_calipso_remove_cb(struct netlbl_dom_map *entry, void *arg)
- {
- struct netlbl_domhsh_walk_arg *cb_arg = arg;
- if (entry->def.type == NETLBL_NLTYPE_CALIPSO &&
- entry->def.calipso->doi == cb_arg->doi)
- return netlbl_domhsh_remove_entry(entry, cb_arg->audit_info);
- return 0;
- }
- static int netlbl_calipso_remove(struct sk_buff *skb, struct genl_info *info)
- {
- int ret_val = -EINVAL;
- struct netlbl_domhsh_walk_arg cb_arg;
- struct netlbl_audit audit_info;
- u32 skip_bkt = 0;
- u32 skip_chain = 0;
- if (!info->attrs[NLBL_CALIPSO_A_DOI])
- return -EINVAL;
- netlbl_netlink_auditinfo(skb, &audit_info);
- cb_arg.doi = nla_get_u32(info->attrs[NLBL_CALIPSO_A_DOI]);
- cb_arg.audit_info = &audit_info;
- ret_val = netlbl_domhsh_walk(&skip_bkt, &skip_chain,
- netlbl_calipso_remove_cb, &cb_arg);
- if (ret_val == 0 || ret_val == -ENOENT) {
- ret_val = calipso_doi_remove(cb_arg.doi, &audit_info);
- if (ret_val == 0)
- atomic_dec(&netlabel_mgmt_protocount);
- }
- return ret_val;
- }
- static const struct genl_ops netlbl_calipso_ops[] = {
- {
- .cmd = NLBL_CALIPSO_C_ADD,
- .flags = GENL_ADMIN_PERM,
- .policy = calipso_genl_policy,
- .doit = netlbl_calipso_add,
- .dumpit = NULL,
- },
- {
- .cmd = NLBL_CALIPSO_C_REMOVE,
- .flags = GENL_ADMIN_PERM,
- .policy = calipso_genl_policy,
- .doit = netlbl_calipso_remove,
- .dumpit = NULL,
- },
- {
- .cmd = NLBL_CALIPSO_C_LIST,
- .flags = 0,
- .policy = calipso_genl_policy,
- .doit = netlbl_calipso_list,
- .dumpit = NULL,
- },
- {
- .cmd = NLBL_CALIPSO_C_LISTALL,
- .flags = 0,
- .policy = calipso_genl_policy,
- .doit = NULL,
- .dumpit = netlbl_calipso_listall,
- },
- };
- int __init netlbl_calipso_genl_init(void)
- {
- return genl_register_family_with_ops(&netlbl_calipso_gnl_family,
- netlbl_calipso_ops);
- }
- static const struct netlbl_calipso_ops *calipso_ops;
- const struct netlbl_calipso_ops *
- netlbl_calipso_ops_register(const struct netlbl_calipso_ops *ops)
- {
- return xchg(&calipso_ops, ops);
- }
- EXPORT_SYMBOL(netlbl_calipso_ops_register);
- static const struct netlbl_calipso_ops *netlbl_calipso_ops_get(void)
- {
- return ACCESS_ONCE(calipso_ops);
- }
- int calipso_doi_add(struct calipso_doi *doi_def,
- struct netlbl_audit *audit_info)
- {
- int ret_val = -ENOMSG;
- const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get();
- if (ops)
- ret_val = ops->doi_add(doi_def, audit_info);
- return ret_val;
- }
- void calipso_doi_free(struct calipso_doi *doi_def)
- {
- const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get();
- if (ops)
- ops->doi_free(doi_def);
- }
- int calipso_doi_remove(u32 doi, struct netlbl_audit *audit_info)
- {
- int ret_val = -ENOMSG;
- const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get();
- if (ops)
- ret_val = ops->doi_remove(doi, audit_info);
- return ret_val;
- }
- struct calipso_doi *calipso_doi_getdef(u32 doi)
- {
- struct calipso_doi *ret_val = NULL;
- const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get();
- if (ops)
- ret_val = ops->doi_getdef(doi);
- return ret_val;
- }
- void calipso_doi_putdef(struct calipso_doi *doi_def)
- {
- const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get();
- if (ops)
- ops->doi_putdef(doi_def);
- }
- int calipso_doi_walk(u32 *skip_cnt,
- int (*callback)(struct calipso_doi *doi_def, void *arg),
- void *cb_arg)
- {
- int ret_val = -ENOMSG;
- const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get();
- if (ops)
- ret_val = ops->doi_walk(skip_cnt, callback, cb_arg);
- return ret_val;
- }
- int calipso_sock_getattr(struct sock *sk, struct netlbl_lsm_secattr *secattr)
- {
- int ret_val = -ENOMSG;
- const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get();
- if (ops)
- ret_val = ops->sock_getattr(sk, secattr);
- return ret_val;
- }
- int calipso_sock_setattr(struct sock *sk,
- const struct calipso_doi *doi_def,
- const struct netlbl_lsm_secattr *secattr)
- {
- int ret_val = -ENOMSG;
- const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get();
- if (ops)
- ret_val = ops->sock_setattr(sk, doi_def, secattr);
- return ret_val;
- }
- void calipso_sock_delattr(struct sock *sk)
- {
- const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get();
- if (ops)
- ops->sock_delattr(sk);
- }
- int calipso_req_setattr(struct request_sock *req,
- const struct calipso_doi *doi_def,
- const struct netlbl_lsm_secattr *secattr)
- {
- int ret_val = -ENOMSG;
- const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get();
- if (ops)
- ret_val = ops->req_setattr(req, doi_def, secattr);
- return ret_val;
- }
- void calipso_req_delattr(struct request_sock *req)
- {
- const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get();
- if (ops)
- ops->req_delattr(req);
- }
- unsigned char *calipso_optptr(const struct sk_buff *skb)
- {
- unsigned char *ret_val = NULL;
- const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get();
- if (ops)
- ret_val = ops->skbuff_optptr(skb);
- return ret_val;
- }
- int calipso_getattr(const unsigned char *calipso,
- struct netlbl_lsm_secattr *secattr)
- {
- int ret_val = -ENOMSG;
- const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get();
- if (ops)
- ret_val = ops->opt_getattr(calipso, secattr);
- return ret_val;
- }
- int calipso_skbuff_setattr(struct sk_buff *skb,
- const struct calipso_doi *doi_def,
- const struct netlbl_lsm_secattr *secattr)
- {
- int ret_val = -ENOMSG;
- const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get();
- if (ops)
- ret_val = ops->skbuff_setattr(skb, doi_def, secattr);
- return ret_val;
- }
- int calipso_skbuff_delattr(struct sk_buff *skb)
- {
- int ret_val = -ENOMSG;
- const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get();
- if (ops)
- ret_val = ops->skbuff_delattr(skb);
- return ret_val;
- }
- void calipso_cache_invalidate(void)
- {
- const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get();
- if (ops)
- ops->cache_invalidate();
- }
- int calipso_cache_add(const unsigned char *calipso_ptr,
- const struct netlbl_lsm_secattr *secattr)
- {
- int ret_val = -ENOMSG;
- const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get();
- if (ops)
- ret_val = ops->cache_add(calipso_ptr, secattr);
- return ret_val;
- }
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