110 lines
3.5 KiB
C
110 lines
3.5 KiB
C
/*
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* Copyright (c) 2016-2022 Apple Inc. All rights reserved.
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*
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* @APPLE_LICENSE_HEADER_START@
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*
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* This file contains Original Code and/or Modifications of Original Code
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* as defined in and that are subject to the Apple Public Source License
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* Version 2.0 (the 'License'). You may not use this file except in
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* compliance with the License. Please obtain a copy of the License at
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* http://www.opensource.apple.com/apsl/ and read it before using this
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* file.
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*
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* The Original Code and all software distributed under the License are
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* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
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* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
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* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
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* Please see the License for the specific language governing rights and
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* limitations under the License.
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*
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* @APPLE_LICENSE_HEADER_END@
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*/
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#ifndef __PBUF_H__
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#define __PBUF_H__
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#include <sys/mbuf.h>
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enum pbuf_type {
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PBUF_TYPE_ZOMBIE = 0,
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PBUF_TYPE_MBUF,
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PBUF_TYPE_MEMORY
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};
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enum pbuf_action {
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PBUF_ACTION_DESTROY
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};
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#define PBUF_ACTION_RV_SUCCESS 0
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#define PBUF_ACTION_RV_FAILURE (-1)
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struct pbuf_memory {
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uint8_t *pm_buffer; // Pointer to start of buffer
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u_int pm_buffer_len; // Total length of buffer
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u_int pm_offset; // Offset to start of payload
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u_int pm_len; // Length of payload
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uint32_t pm_csum_flags;
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uint32_t pm_csum_data;
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uint8_t pm_proto;
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uint8_t pm_flowsrc;
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uint32_t pm_flowid;
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uint32_t pm_flow_gencnt;
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uint32_t pm_flags;
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struct pf_mtag pm_pftag;
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struct pf_fragment_tag pm_pf_fragtag;
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int (*pm_action)(struct pbuf_memory *, enum pbuf_action);
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void *pm_action_cookie;
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};
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typedef struct pbuf {
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enum pbuf_type pb_type;
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union {
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struct mbuf *pbu_mbuf;
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struct pbuf_memory pbu_memory;
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} pb_u;
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#define pb_mbuf pb_u.pbu_mbuf
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#define pb_memory pb_u.pbu_memory
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void *pb_data;
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uint32_t pb_packet_len;
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uint32_t pb_contig_len;
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uint32_t *pb_csum_flags;
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uint32_t *pb_csum_data; /* data field used by csum routines */
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uint8_t *pb_proto;
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uint8_t *pb_flowsrc;
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uint32_t *pb_flowid;
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uint32_t *pb_flow_gencnt;
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uint32_t *pb_flags;
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struct pf_mtag *pb_pftag;
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struct pf_fragment_tag *pb_pf_fragtag;
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struct ifnet *pb_ifp;
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struct pbuf *pb_next;
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} pbuf_t;
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#define pbuf_is_valid(pb) (!((pb) == NULL || (pb)->pb_type == PBUF_TYPE_ZOMBIE))
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void pbuf_init_mbuf(pbuf_t *, struct mbuf *, struct ifnet *);
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void pbuf_init_memory(pbuf_t *, const struct pbuf_memory *,
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struct ifnet *);
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void pbuf_destroy(pbuf_t *);
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void pbuf_sync(pbuf_t *);
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struct mbuf *pbuf_to_mbuf(pbuf_t *, boolean_t);
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struct mbuf *pbuf_clone_to_mbuf(pbuf_t *);
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void * pbuf_ensure_contig(pbuf_t *, size_t);
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void * pbuf_ensure_writable(pbuf_t *, size_t);
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void * pbuf_resize_segment(pbuf_t *, int off, int olen, int nlen);
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void * pbuf_contig_segment(pbuf_t *, int off, int len);
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void pbuf_copy_data(pbuf_t *, int, int, void *);
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void pbuf_copy_back(pbuf_t *, int, int, void *);
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uint16_t pbuf_inet_cksum(const pbuf_t *, uint32_t, uint32_t, uint32_t);
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uint16_t pbuf_inet6_cksum(const pbuf_t *, uint32_t, uint32_t, uint32_t);
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mbuf_svc_class_t pbuf_get_service_class(const pbuf_t *);
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void * pbuf_get_packet_buffer_address(const pbuf_t *);
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#endif /* __PBUF_H__ */
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