src/libs/Network/uip/plan9/plan9.h

   1 #ifndef __PLAN9_H__
   2 #define __PLAN9_H__
   3
   4 /*
   5  * 9P network filesystem protocol
   6  *
   7  * by Daniel Mendler <mail@daniel-mendler.de>
   8  *
   9  * Resources:
  10  *
  11  *   - Documentation: http://9p.cat-v.org/
  12  *   - List of implementations: http://9p.cat-v.org/implementations
  13  *   - Specification: http://ericvh.github.io/9p-rfc/
  14  *   - Linux documentation: https://www.kernel.org/doc/Documentation/filesystems/9p.txt
  15  *
  16  * How to use it:
  17  *
  18  *   1. Add "network.plan9.enable true" to the config
  19  *   2. Mount under Linux with "mount -t 9p $ip /mnt/smoothie
  20  */
  21
  22 #include <map>
  23 #include <queue>
  24 #include <string>
  25 #include <stdint.h>
  26
  27 extern "C" {
  28 #include "psock.h"
  29 }
  30
  31 class Plan9
  32 {
  33 public:
  34     Plan9();
  35     ~Plan9();
  36
  37     static void init();
  38     static void appcall();
  39
  40     struct EntryData {
  41         uint8_t     type;
  42         int         refcount;
  43
  44         EntryData() {}
  45         EntryData(uint8_t t)
  46             : type(t), refcount(0) {}
  47     };
  48
  49     typedef std::map<std::string, EntryData> EntryMap;
  50     typedef EntryMap::value_type*            Entry;
  51     typedef std::map<uint32_t, Entry>        FidMap;
  52     union Message;
  53
  54 private:
  55     int receive();
  56     int send();
  57     bool process(Message*, Message*);
  58
  59     Entry add_entry(uint32_t, uint8_t, const std::string&);
  60     Entry get_entry(uint32_t);
  61     bool add_fid(uint32_t, Entry);
  62     void remove_fid(uint32_t);
  63
  64     static const uint32_t INITIAL_MSIZE = 300;
  65     EntryMap             entries;
  66     FidMap               fids;
  67     psock                sin, sout;
  68     char                 bufin[INITIAL_MSIZE], bufout[INITIAL_MSIZE];
  69     std::queue<Message*> queue;
  70     uint32_t             msize, queue_bytes;
  71 };
  72
  73 #endif