+/*
+ * Copyright (c) 2008 Apple Inc. All rights reserved.
+ *
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
+ *
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
+ *
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
+ *
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ *
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
+ */
+
+#include <sys/types.h>
+#include <kern/locks.h>
+#include <kern/kalloc.h>
+#include <sys/errno.h>
+#include <sys/sysctl.h>
+#include <sys/malloc.h>
+#include <sys/socket.h>
+#include <libkern/OSAtomic.h>
+#include <libkern/libkern.h>
+#include <net/if.h>
+#include <net/if_mib.h>
+#include <string.h>
+
+#include "net/net_str_id.h"
+
+#define NET_ID_STR_ENTRY_SIZE(__str) \
+ ((size_t)&(((struct net_str_id_entry*)0)->nsi_string[0]) + \
+ strlen(__str) + 1)
+
+#define FIRST_NET_STR_ID 1000
+static SLIST_HEAD(,net_str_id_entry) net_str_id_list = {NULL};
+static lck_mtx_t *net_str_id_lock = NULL;
+
+static u_int32_t nsi_kind_next[NSI_MAX_KIND] = { FIRST_NET_STR_ID, FIRST_NET_STR_ID, FIRST_NET_STR_ID };
+static u_int32_t nsi_next_id = FIRST_NET_STR_ID;
+
+#if NETMIBS
+
+extern int sysctl_if_family_ids SYSCTL_HANDLER_ARGS;
+
+SYSCTL_DECL(_net_link_generic_system);
+
+SYSCTL_PROC(_net_link_generic_system, OID_AUTO, if_family_ids, CTLTYPE_STRUCT | CTLFLAG_RD | CTLFLAG_LOCKED,
+ 0, 0, sysctl_if_family_ids, "S, if_family_id", "Interface Family ID table");
+
+#endif /* NETMIBS */
+
+
+__private_extern__ void
+net_str_id_init(void)
+{
+ lck_grp_attr_t *grp_attrib = NULL;
+ lck_attr_t *lck_attrb = NULL;
+ lck_grp_t *lck_group = NULL;
+
+ grp_attrib = lck_grp_attr_alloc_init();
+ lck_group = lck_grp_alloc_init("mbuf_tag_allocate_id", grp_attrib);
+ lck_grp_attr_free(grp_attrib);
+ lck_attrb = lck_attr_alloc_init();
+
+ net_str_id_lock = lck_mtx_alloc_init(lck_group, lck_attrb);
+
+ lck_grp_free(lck_group);
+ lck_attr_free(lck_attrb);
+}
+
+__private_extern__ void
+net_str_id_first_last(u_int32_t *first, u_int32_t *last, u_int32_t kind)
+{
+ *first = FIRST_NET_STR_ID;
+
+ switch (kind) {
+ case NSI_MBUF_TAG:
+ case NSI_VENDOR_CODE:
+ case NSI_IF_FAM_ID:
+ *last = nsi_kind_next[kind] - 1;
+ break;
+ default:
+ *last = FIRST_NET_STR_ID - 1;
+ break;
+ }
+}
+
+__private_extern__ errno_t
+net_str_id_find_internal(const char *string, u_int32_t *out_id,
+ u_int32_t kind, int create)
+{
+ struct net_str_id_entry *entry = NULL;
+
+
+ if (string == NULL || out_id == NULL || kind >= NSI_MAX_KIND)
+ return EINVAL;
+
+ *out_id = 0;
+
+ /* Look for an existing entry */
+ lck_mtx_lock(net_str_id_lock);
+ SLIST_FOREACH(entry, &net_str_id_list, nsi_next) {
+ if (strcmp(string, entry->nsi_string) == 0) {
+ break;
+ }
+ }
+
+ if (entry == NULL) {
+ if (create == 0) {
+ lck_mtx_unlock(net_str_id_lock);
+ return ENOENT;
+ }
+
+ entry = kalloc(NET_ID_STR_ENTRY_SIZE(string));
+ if (entry == NULL) {
+ lck_mtx_unlock(net_str_id_lock);
+ return ENOMEM;
+ }
+
+ strlcpy(entry->nsi_string, string, strlen(string) + 1);
+ entry->nsi_flags = (1 << kind);
+ entry->nsi_id = nsi_next_id++;
+ nsi_kind_next[kind] = nsi_next_id;
+ SLIST_INSERT_HEAD(&net_str_id_list, entry, nsi_next);
+ } else if ((entry->nsi_flags & (1 << kind)) == 0) {
+ if (create == 0) {
+ lck_mtx_unlock(net_str_id_lock);
+ return ENOENT;
+ }
+ entry->nsi_flags |= (1 << kind);
+ if (entry->nsi_id >= nsi_kind_next[kind])
+ nsi_kind_next[kind] = entry->nsi_id + 1;
+ }
+ lck_mtx_unlock(net_str_id_lock);
+
+ *out_id = entry->nsi_id;
+
+ return 0;
+}
+
+
+#if NETMIBS
+
+#define ROUNDUP32(a) \
+ ((a) > 0 ? (1 + (((a) - 1) | (sizeof(uint32_t) - 1))) : sizeof(uint32_t))
+
+int
+sysctl_if_family_ids SYSCTL_HANDLER_ARGS /* XXX bad syntax! */
+{
+#pragma unused(oidp)
+#pragma unused(arg1)
+#pragma unused(arg2)
+ errno_t error = 0;
+ struct net_str_id_entry *entry = NULL;
+ struct if_family_id *iffmid = NULL;
+ size_t max_size = 0;
+
+ lck_mtx_lock(net_str_id_lock);
+ SLIST_FOREACH(entry, &net_str_id_list, nsi_next) {
+ size_t str_size;
+ size_t iffmid_size;
+
+ if ((entry->nsi_flags & (1 << NSI_IF_FAM_ID)) == 0)
+ continue;
+
+ str_size = strlen(entry->nsi_string) + 1;
+ iffmid_size = ROUNDUP32(offsetof(struct net_str_id_entry, nsi_string) + str_size);
+
+ if (iffmid_size > max_size) {
+ if (iffmid)
+ _FREE(iffmid, M_TEMP);
+ iffmid = _MALLOC(iffmid_size, M_TEMP, M_WAITOK);
+ if (iffmid == NULL) {
+ lck_mtx_unlock(net_str_id_lock);
+ error = ENOMEM;
+ goto done;
+ }
+ max_size = iffmid_size;
+ }
+
+ bzero(iffmid, iffmid_size);
+ iffmid->iffmid_len = iffmid_size;
+ iffmid->iffmid_id = entry->nsi_id;
+ strlcpy(iffmid->iffmid_str, entry->nsi_string, str_size);
+ error = SYSCTL_OUT(req, iffmid, iffmid_size);
+ if (error) {
+ lck_mtx_unlock(net_str_id_lock);
+ goto done;
+ }
+
+ }
+ lck_mtx_unlock(net_str_id_lock);
+
+done:
+ if (iffmid)
+ _FREE(iffmid, M_TEMP);
+ return error;
+}
+
+#endif /* NETMIBS */
+
projects / apple / xnu.git / blobdiff