mirror of
https://review.haiku-os.org/haiku
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74a4c33fda
upper layers: you use the store_header() function to mark the header you want to preserve. All subsequent remove_header() calls won't claim the actual data, but only move the node start around. * This header can then be restored by restore_header(). However, a call to prepend_data() will destroy the stored header. Also, if remove_header() cuts off a whole node, restoring the header won't succeed anymore. * Discarded the no longer needed net_buffer::network_header field. * Also discarded the hoplimit field which temporarily breaks the IPv6 build until Atis reworks it. * IPv4 now also dumps the IP header in the send path if debug output is enabled. * icmp_error_reply() might be called so early that the net_buffer's addresses do not point to the reply address; this is now detected, and the addresses are taken out of the IP header in that case. * Improved dumping the net_buffer to also include its address, and flags. git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@37688 a95241bf-73f2-0310-859d-f6bbb57e9c96
110 lines
3.3 KiB
C
110 lines
3.3 KiB
C
/*
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* Copyright 2006-2010, Haiku, Inc. All Rights Reserved.
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* Distributed under the terms of the MIT License.
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*/
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#ifndef NET_BUFFER_H
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#define NET_BUFFER_H
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#include <util/list.h>
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#include <module.h>
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#include <sys/socket.h>
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#define NET_BUFFER_MODULE_NAME "network/stack/buffer/v1"
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typedef struct net_buffer {
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struct list_link link;
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// TODO: we should think about moving the address fields into the buffer
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// data itself via associated data or something like this. Or this
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// structure as a whole, too...
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struct sockaddr* source;
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struct sockaddr* destination;
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struct net_interface* interface;
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int32 type;
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union {
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struct {
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uint16 start;
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uint16 end;
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} fragment;
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uint32 sequence;
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uint32 offset;
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};
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uint32 flags;
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uint32 size;
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uint8 protocol;
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} net_buffer;
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struct ancillary_data_container;
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struct net_buffer_module_info {
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module_info info;
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net_buffer* (*create)(size_t headerSpace);
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void (*free)(net_buffer* buffer);
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net_buffer* (*duplicate)(net_buffer* from);
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net_buffer* (*clone)(net_buffer* from, bool shareFreeSpace);
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net_buffer* (*split)(net_buffer* from, uint32 offset);
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status_t (*merge)(net_buffer* buffer, net_buffer* with, bool after);
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status_t (*prepend_size)(net_buffer* buffer, size_t size,
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void** _contiguousBuffer);
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status_t (*prepend)(net_buffer* buffer, const void* data,
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size_t bytes);
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status_t (*append_size)(net_buffer* buffer, size_t size,
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void** _contiguousBuffer);
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status_t (*append)(net_buffer* buffer, const void* data,
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size_t bytes);
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status_t (*insert)(net_buffer* buffer, uint32 offset,
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const void* data, size_t bytes, uint32 flags);
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status_t (*remove)(net_buffer* buffer, uint32 offset,
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size_t bytes);
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status_t (*remove_header)(net_buffer* buffer, size_t bytes);
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status_t (*remove_trailer)(net_buffer* buffer, size_t bytes);
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status_t (*trim)(net_buffer* buffer, size_t newSize);
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status_t (*append_cloned)(net_buffer* buffer, net_buffer* source,
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uint32 offset, size_t bytes);
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status_t (*associate_data)(net_buffer* buffer, void* data);
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void (*set_ancillary_data)(net_buffer* buffer,
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struct ancillary_data_container* container);
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struct ancillary_data_container* (*get_ancillary_data)(net_buffer* buffer);
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void* (*transfer_ancillary_data)(net_buffer* from,
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net_buffer* to);
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status_t (*store_header)(net_buffer* buffer);
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ssize_t (*stored_header_length)(net_buffer* buffer);
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status_t (*restore_header)(net_buffer* buffer, uint32 offset,
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void* data, size_t bytes);
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status_t (*append_restored_header)(net_buffer* buffer,
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net_buffer* source, uint32 offset, size_t bytes);
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status_t (*direct_access)(net_buffer* buffer, uint32 offset,
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size_t bytes, void** _data);
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status_t (*read)(net_buffer* buffer, uint32 offset, void* data,
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size_t bytes);
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status_t (*write)(net_buffer* buffer, uint32 offset,
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const void* data, size_t bytes);
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int32 (*checksum)(net_buffer* buffer, uint32 offset, size_t bytes,
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bool finalize);
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status_t (*get_memory_map)(net_buffer* buffer,
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struct iovec* iovecs, uint32 vecCount);
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uint32 (*get_iovecs)(net_buffer* buffer,
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struct iovec* iovecs, uint32 vecCount);
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uint32 (*count_iovecs)(net_buffer* buffer);
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void (*swap_addresses)(net_buffer* buffer);
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void (*dump)(net_buffer* buffer);
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};
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#endif // NET_BUFFER_H
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