1 /* 2 * Copyright 2006, Haiku, Inc. All Rights Reserved. 3 * Distributed under the terms of the MIT License. 4 */ 5 #ifndef NET_BUFFER_H 6 #define NET_BUFFER_H 7 8 9 #include <util/list.h> 10 11 #include <module.h> 12 #include <sys/socket.h> 13 14 15 #define NET_BUFFER_MODULE_NAME "network/stack/buffer/v1" 16 17 typedef struct net_buffer { 18 struct list_link link; 19 20 // TODO: we should think about moving the address fields into the buffer data itself 21 // via associated data or something like this. Or this structure as a whole, too... 22 struct sockaddr_storage source; 23 struct sockaddr_storage destination; 24 struct net_interface *interface; 25 union { 26 struct { 27 uint16 start; 28 uint16 end; 29 } fragment; 30 uint32 sequence; 31 uint32 offset; 32 }; 33 uint32 flags; 34 uint32 size; 35 uint8 protocol; 36 } net_buffer; 37 38 struct net_buffer_module_info { 39 module_info info; 40 41 net_buffer * (*create)(size_t headerSpace); 42 void (*free)(net_buffer *buffer); 43 44 net_buffer * (*duplicate)(net_buffer *from); 45 net_buffer * (*clone)(net_buffer *from, bool shareFreeSpace); 46 net_buffer * (*split)(net_buffer *from, uint32 offset); 47 status_t (*merge)(net_buffer *buffer, net_buffer *with, bool after); 48 49 status_t (*prepend_size)(net_buffer *buffer, size_t size, 50 void **_contiguousBuffer); 51 status_t (*prepend)(net_buffer *buffer, const void *data, 52 size_t bytes); 53 status_t (*append_size)(net_buffer *buffer, size_t size, 54 void **_contiguousBuffer); 55 status_t (*append)(net_buffer *buffer, const void *data, 56 size_t bytes); 57 status_t (*insert)(net_buffer *buffer, uint32 offset, 58 const void *data, size_t bytes, uint32 flags); 59 status_t (*remove)(net_buffer *buffer, uint32 offset, 60 size_t bytes); 61 status_t (*remove_header)(net_buffer *buffer, size_t bytes); 62 status_t (*remove_trailer)(net_buffer *buffer, size_t bytes); 63 status_t (*trim)(net_buffer *buffer, size_t newSize); 64 status_t (*append_cloned)(net_buffer *buffer, net_buffer *source, 65 uint32 offset, size_t bytes); 66 67 status_t (*associate_data)(net_buffer *buffer, void *data); 68 69 status_t (*direct_access)(net_buffer *buffer, uint32 offset, 70 size_t bytes, void **_data); 71 status_t (*read)(net_buffer *buffer, uint32 offset, void *data, 72 size_t bytes); 73 status_t (*write)(net_buffer *buffer, uint32 offset, 74 const void *data, size_t bytes); 75 76 int32 (*checksum)(net_buffer *buffer, uint32 offset, size_t bytes, 77 bool finalize); 78 status_t (*get_memory_map)(net_buffer *buffer, 79 struct iovec *iovecs, uint32 vecCount); 80 uint32 (*get_iovecs)(net_buffer *buffer, 81 struct iovec *iovecs, uint32 vecCount); 82 uint32 (*count_iovecs)(net_buffer *buffer); 83 84 void (*dump)(net_buffer *buffer); 85 }; 86 87 #endif // NET_BUFFER_H 88