--- /dev/null
+/*
+ * Copyright (c) 2016 Apple Inc. All rights reserved.
+ *
+ * @APPLE_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. 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_LICENSE_HEADER_END@
+ */
+
+#ifndef __PBUF_H__
+#define __PBUF_H__
+
+#include <sys/mbuf.h>
+
+enum pbuf_type {
+ PBUF_TYPE_ZOMBIE = 0,
+ PBUF_TYPE_MBUF,
+ PBUF_TYPE_MEMORY
+};
+
+enum pbuf_action {
+ PBUF_ACTION_DESTROY
+};
+
+#define PBUF_ACTION_RV_SUCCESS 0
+#define PBUF_ACTION_RV_FAILURE (-1)
+
+struct pbuf_memory {
+ uint8_t *pm_buffer; // Pointer to start of buffer
+ u_int pm_buffer_len; // Total length of buffer
+ u_int pm_offset; // Offset to start of payload
+ u_int pm_len; // Length of payload
+ uint32_t pm_csum_flags;
+ uint32_t pm_csum_data;
+ uint8_t pm_proto;
+ uint8_t pm_flowsrc;
+ uint32_t pm_flowid;
+ uint32_t pm_flags;
+ struct pf_mtag pm_pftag;
+ int (*pm_action)(struct pbuf_memory *, enum pbuf_action);
+ void *pm_action_cookie;
+};
+
+typedef struct pbuf {
+ enum pbuf_type pb_type;
+ union {
+ struct mbuf *pbu_mbuf;
+ struct pbuf_memory pbu_memory;
+ } pb_u;
+#define pb_mbuf pb_u.pbu_mbuf
+#define pb_memory pb_u.pbu_memory
+
+ void *pb_data;
+ uint32_t pb_packet_len;
+ uint32_t pb_contig_len;
+ uint32_t *pb_csum_flags;
+ uint32_t *pb_csum_data;
+ uint8_t *pb_proto;
+ uint8_t *pb_flowsrc;
+ uint32_t *pb_flowid;
+ uint32_t *pb_flags;
+ struct pf_mtag *pb_pftag;
+ struct ifnet *pb_ifp;
+ struct pbuf *pb_next;
+} pbuf_t;
+
+#define pbuf_is_valid(pb) (!((pb) == NULL || (pb)->pb_type == PBUF_TYPE_ZOMBIE))
+
+void pbuf_init_mbuf(pbuf_t *, struct mbuf *, struct ifnet *);
+void pbuf_init_memory(pbuf_t *, const struct pbuf_memory *,
+ struct ifnet *);
+void pbuf_destroy(pbuf_t *);
+void pbuf_sync(pbuf_t *);
+
+struct mbuf *pbuf_to_mbuf(pbuf_t *, boolean_t);
+struct mbuf *pbuf_clone_to_mbuf(pbuf_t *);
+
+void * pbuf_ensure_contig(pbuf_t *, size_t);
+void * pbuf_ensure_writable(pbuf_t *, size_t);
+
+void * pbuf_resize_segment(pbuf_t *, int off, int olen, int nlen);
+void * pbuf_contig_segment(pbuf_t *, int off, int len);
+
+void pbuf_copy_data(pbuf_t *, int, int, void *);
+void pbuf_copy_back(pbuf_t *, int, int, void *);
+
+uint16_t pbuf_inet_cksum(const pbuf_t *, uint32_t, uint32_t, uint32_t);
+uint16_t pbuf_inet6_cksum(const pbuf_t *, uint32_t, uint32_t, uint32_t);
+
+mbuf_svc_class_t pbuf_get_service_class(const pbuf_t *);
+
+#endif /* __PBUF_H__ */