+++ /dev/null
-/*
- * lib/genl/ctrl.c Generic Netlink Controller
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation version 2.1
- * of the License.
- *
- * Copyright (c) 2003-2008 Thomas Graf <tgraf@suug.ch>
- */
-
-/**
- * @ingroup genl_mngt
- * @defgroup ctrl Controller
- * @brief
- *
- * @{
- */
-
-#include <netlink-generic.h>
-#include <netlink/netlink.h>
-#include <netlink/genl/genl.h>
-#include <netlink/genl/family.h>
-#include <netlink/genl/mngt.h>
-#include <netlink/genl/ctrl.h>
-#include <netlink/utils.h>
-
-/** @cond SKIP */
-#define CTRL_VERSION 0x0001
-
-static struct nl_cache_ops genl_ctrl_ops;
-/** @endcond */
-
-static int ctrl_request_update(struct nl_cache *c, struct nl_sock *h)
-{
- return genl_send_simple(h, GENL_ID_CTRL, CTRL_CMD_GETFAMILY,
- CTRL_VERSION, NLM_F_DUMP);
-}
-
-static struct nla_policy ctrl_policy[CTRL_ATTR_MAX+1] = {
- [CTRL_ATTR_FAMILY_ID] = { .type = NLA_U16 },
- [CTRL_ATTR_FAMILY_NAME] = { .type = NLA_STRING,
- .maxlen = GENL_NAMSIZ },
- [CTRL_ATTR_VERSION] = { .type = NLA_U32 },
- [CTRL_ATTR_HDRSIZE] = { .type = NLA_U32 },
- [CTRL_ATTR_MAXATTR] = { .type = NLA_U32 },
- [CTRL_ATTR_OPS] = { .type = NLA_NESTED },
- [CTRL_ATTR_MCAST_GROUPS] = { .type = NLA_NESTED },
-};
-
-static struct nla_policy family_op_policy[CTRL_ATTR_OP_MAX+1] = {
- [CTRL_ATTR_OP_ID] = { .type = NLA_U32 },
- [CTRL_ATTR_OP_FLAGS] = { .type = NLA_U32 },
-};
-
-static struct nla_policy family_grp_policy[CTRL_ATTR_MCAST_GRP_MAX+1] = {
- [CTRL_ATTR_MCAST_GRP_NAME] = { .type = NLA_STRING },
- [CTRL_ATTR_MCAST_GRP_ID] = { .type = NLA_U32 },
-};
-
-static int ctrl_msg_parser(struct nl_cache_ops *ops, struct genl_cmd *cmd,
- struct genl_info *info, void *arg)
-{
- struct genl_family *family;
- struct nl_parser_param *pp = arg;
- int err;
-
- family = genl_family_alloc();
- if (family == NULL) {
- err = -NLE_NOMEM;
- goto errout;
- }
-
- if (info->attrs[CTRL_ATTR_FAMILY_NAME] == NULL) {
- err = -NLE_MISSING_ATTR;
- goto errout;
- }
-
- if (info->attrs[CTRL_ATTR_FAMILY_ID] == NULL) {
- err = -NLE_MISSING_ATTR;
- goto errout;
- }
-
- family->ce_msgtype = info->nlh->nlmsg_type;
- genl_family_set_id(family,
- nla_get_u16(info->attrs[CTRL_ATTR_FAMILY_ID]));
- genl_family_set_name(family,
- nla_get_string(info->attrs[CTRL_ATTR_FAMILY_NAME]));
-
- if (info->attrs[CTRL_ATTR_VERSION]) {
- uint32_t version = nla_get_u32(info->attrs[CTRL_ATTR_VERSION]);
- genl_family_set_version(family, version);
- }
-
- if (info->attrs[CTRL_ATTR_HDRSIZE]) {
- uint32_t hdrsize = nla_get_u32(info->attrs[CTRL_ATTR_HDRSIZE]);
- genl_family_set_hdrsize(family, hdrsize);
- }
-
- if (info->attrs[CTRL_ATTR_MAXATTR]) {
- uint32_t maxattr = nla_get_u32(info->attrs[CTRL_ATTR_MAXATTR]);
- genl_family_set_maxattr(family, maxattr);
- }
-
- if (info->attrs[CTRL_ATTR_OPS]) {
- struct nlattr *nla, *nla_ops;
- int remaining;
-
- nla_ops = info->attrs[CTRL_ATTR_OPS];
- nla_for_each_nested(nla, nla_ops, remaining) {
- struct nlattr *tb[CTRL_ATTR_OP_MAX+1];
- int flags = 0, id;
-
- err = nla_parse_nested(tb, CTRL_ATTR_OP_MAX, nla,
- family_op_policy);
- if (err < 0)
- goto errout;
-
- if (tb[CTRL_ATTR_OP_ID] == NULL) {
- err = -NLE_MISSING_ATTR;
- goto errout;
- }
-
- id = nla_get_u32(tb[CTRL_ATTR_OP_ID]);
-
- if (tb[CTRL_ATTR_OP_FLAGS])
- flags = nla_get_u32(tb[CTRL_ATTR_OP_FLAGS]);
-
- err = genl_family_add_op(family, id, flags);
- if (err < 0)
- goto errout;
-
- }
- }
-
- if (info->attrs[CTRL_ATTR_MCAST_GROUPS]) {
- struct nlattr *nla, *nla_grps;
- int remaining;
-
- nla_grps = info->attrs[CTRL_ATTR_MCAST_GROUPS];
- nla_for_each_nested(nla, nla_grps, remaining) {
- struct nlattr *tb[CTRL_ATTR_MCAST_GRP_MAX+1];
- int id;
- const char * name;
-
- err = nla_parse_nested(tb, CTRL_ATTR_MCAST_GRP_MAX, nla,
- family_grp_policy);
- if (err < 0)
- goto errout;
-
- if (tb[CTRL_ATTR_MCAST_GRP_ID] == NULL) {
- err = -NLE_MISSING_ATTR;
- goto errout;
- }
- id = nla_get_u32(tb[CTRL_ATTR_MCAST_GRP_ID]);
-
- if (tb[CTRL_ATTR_MCAST_GRP_NAME] == NULL) {
- err = -NLE_MISSING_ATTR;
- goto errout;
- }
- name = nla_get_string(tb[CTRL_ATTR_MCAST_GRP_NAME]);
-
- err = genl_family_add_grp(family, id, name);
- if (err < 0)
- goto errout;
- }
-
- }
-
- err = pp->pp_cb((struct nl_object *) family, pp);
-errout:
- genl_family_put(family);
- return err;
-}
-
-/**
- * @name Cache Management
- * @{
- */
-
-int genl_ctrl_alloc_cache(struct nl_sock *sock, struct nl_cache **result)
-{
- return nl_cache_alloc_and_fill(&genl_ctrl_ops, sock, result);
-}
-
-/**
- * Look up generic netlink family by id in the provided cache.
- * @arg cache Generic netlink family cache.
- * @arg id Family identifier.
- *
- * Searches through the cache looking for a registered family
- * matching the specified identifier. The caller will own a
- * reference on the returned object which needs to be given
- * back after usage using genl_family_put().
- *
- * @return Generic netlink family object or NULL if no match was found.
- */
-struct genl_family *genl_ctrl_search(struct nl_cache *cache, int id)
-{
- struct genl_family *fam;
-
- if (cache->c_ops != &genl_ctrl_ops)
- BUG();
-
- nl_list_for_each_entry(fam, &cache->c_items, ce_list) {
- if (fam->gf_id == id) {
- nl_object_get((struct nl_object *) fam);
- return fam;
- }
- }
-
- return NULL;
-}
-
-/**
- * @name Resolver
- * @{
- */
-
-/**
- * Look up generic netlink family by family name in the provided cache.
- * @arg cache Generic netlink family cache.
- * @arg name Family name.
- *
- * Searches through the cache looking for a registered family
- * matching the specified name. The caller will own a reference
- * on the returned object which needs to be given back after
- * usage using genl_family_put().
- *
- * @return Generic netlink family object or NULL if no match was found.
- */
-struct genl_family *genl_ctrl_search_by_name(struct nl_cache *cache,
- const char *name)
-{
- struct genl_family *fam;
-
- if (cache->c_ops != &genl_ctrl_ops)
- BUG();
-
- nl_list_for_each_entry(fam, &cache->c_items, ce_list) {
- if (!strcmp(name, fam->gf_name)) {
- nl_object_get((struct nl_object *) fam);
- return fam;
- }
- }
-
- return NULL;
-}
-
-/** @} */
-
-/**
- * Resolve generic netlink family name to its identifier
- * @arg sk Netlink socket.
- * @arg name Name of generic netlink family
- *
- * Resolves the generic netlink family name to its identifer and returns
- * it.
- *
- * @return A positive identifier or a negative error code.
- */
-int genl_ctrl_resolve(struct nl_sock *sk, const char *name)
-{
- struct nl_cache *cache;
- struct genl_family *family;
- int err;
-
- if ((err = genl_ctrl_alloc_cache(sk, &cache)) < 0)
- return err;
-
- family = genl_ctrl_search_by_name(cache, name);
- if (family == NULL) {
- err = -NLE_OBJ_NOTFOUND;
- goto errout;
- }
-
- err = genl_family_get_id(family);
- genl_family_put(family);
-errout:
- nl_cache_free(cache);
-
- return err;
-}
-
-static int genl_ctrl_grp_by_name(const struct genl_family *family,
- const char *grp_name)
-{
- struct genl_family_grp *grp;
-
- nl_list_for_each_entry(grp, &family->gf_mc_grps, list) {
- if (!strcmp(grp->name, grp_name)) {
- return grp->id;
- }
- }
-
- return -NLE_OBJ_NOTFOUND;
-}
-
-int genl_ctrl_resolve_grp(struct nl_sock *sk, const char *family_name,
- const char *grp_name)
-{
- struct nl_cache *cache;
- struct genl_family *family;
- int err;
-
- if ((err = genl_ctrl_alloc_cache(sk, &cache)) < 0)
- return err;
-
- family = genl_ctrl_search_by_name(cache, family_name);
- if (family == NULL) {
- err = -NLE_OBJ_NOTFOUND;
- goto errout;
- }
-
- err = genl_ctrl_grp_by_name(family, grp_name);
- genl_family_put(family);
-errout:
- nl_cache_free(cache);
-
- return err;
-}
-
-/** @} */
-
-static struct genl_cmd genl_cmds[] = {
- {
- .c_id = CTRL_CMD_NEWFAMILY,
- .c_name = "NEWFAMILY" ,
- .c_maxattr = CTRL_ATTR_MAX,
- .c_attr_policy = ctrl_policy,
- .c_msg_parser = ctrl_msg_parser,
- },
- {
- .c_id = CTRL_CMD_DELFAMILY,
- .c_name = "DELFAMILY" ,
- },
- {
- .c_id = CTRL_CMD_GETFAMILY,
- .c_name = "GETFAMILY" ,
- },
- {
- .c_id = CTRL_CMD_NEWOPS,
- .c_name = "NEWOPS" ,
- },
- {
- .c_id = CTRL_CMD_DELOPS,
- .c_name = "DELOPS" ,
- },
-};
-
-static struct genl_ops genl_ops = {
- .o_cmds = genl_cmds,
- .o_ncmds = ARRAY_SIZE(genl_cmds),
-};
-
-/** @cond SKIP */
-extern struct nl_object_ops genl_family_ops;
-/** @endcond */
-
-static struct nl_cache_ops genl_ctrl_ops = {
- .co_name = "genl/family",
- .co_hdrsize = GENL_HDRSIZE(0),
- .co_msgtypes = GENL_FAMILY(GENL_ID_CTRL, "nlctrl"),
- .co_genl = &genl_ops,
- .co_protocol = NETLINK_GENERIC,
- .co_request_update = ctrl_request_update,
- .co_obj_ops = &genl_family_ops,
-};
-
-static void __init ctrl_init(void)
-{
- genl_register(&genl_ctrl_ops);
-}
-
-static void __exit ctrl_exit(void)
-{
- genl_unregister(&genl_ctrl_ops);
-}
-
-/** @} */
projects / openwrt / openwrt.git / blobdiff