openflow build environment setup

2025-11-11 16:45:43 +08:00
parent be0a7ad9b3
commit 50ecb9a23f
2767 changed files with 62766 additions and 649828 deletions
--- a/openflow/include/click/fromfile.hh
+++ b/openflow/include/click/fromfile.hh
@ -0,0 +1,96 @@
+// -*- related-file-name: "../../lib/fromfile.cc"; c-basic-offset: 4 -*-
+#ifndef CLICK_FROMFILE_HH
+#define CLICK_FROMFILE_HH
+#include <click/string.hh>
+#include <click/vector.hh>
+#include <stdio.h>
+CLICK_DECLS
+class ErrorHandler;
+class Element;
+class Packet;
+class WritablePacket;
+
+class FromFile { public:
+
+    FromFile();
+    ~FromFile()				{ cleanup(); }
+
+    const String &filename() const	{ return _filename; }
+    String &filename()			{ return _filename; }
+    bool initialized() const		{ return _fd != -1; }
+
+    void set_landmark_pattern(const String &lp) { _landmark_pattern = lp; }
+    String landmark(const String &landmark_pattern) const;
+    String landmark() const		{ return landmark(_landmark_pattern); }
+    String print_filename() const;
+    int lineno() const			{ return _lineno; }
+    void set_lineno(int lineno)		{ _lineno = lineno; }
+
+    off_t file_pos() const		{ return _file_offset + _pos; }
+
+    int configure_keywords(Vector<String>& conf, Element* e, ErrorHandler* errh);
+    int set_data(const String& data, ErrorHandler* errh);
+    int initialize(ErrorHandler* errh, bool allow_nonexistent = false);
+    void add_handlers(Element* e, bool filepos_writable = false) const;
+    void cleanup();
+    void take_state(FromFile &, ErrorHandler *);
+
+    int seek(off_t want, ErrorHandler *);
+
+    int read(void*, uint32_t, ErrorHandler * = 0);
+    const uint8_t* get_unaligned(size_t, void*, ErrorHandler* = 0);
+    const uint8_t* get_aligned(size_t, void*, ErrorHandler* = 0);
+    String get_string(size_t, ErrorHandler* = 0);
+    Packet* get_packet(size_t, uint32_t sec, uint32_t subsec, ErrorHandler *);
+    Packet* get_packet_from_data(const void *buf, size_t buf_size, size_t full_size, uint32_t sec, uint32_t subsec, ErrorHandler *);
+    void shift_pos(int delta)		{ _pos += delta; }
+
+    int read_line(String &str, ErrorHandler *errh, bool temporary = false);
+    int peek_line(String &str, ErrorHandler *errh, bool temporary = false);
+
+    int error(ErrorHandler *, const char *format, ...) const;
+    int warning(ErrorHandler *, const char *format, ...) const;
+
+  private:
+
+    enum { BUFFER_SIZE = 32768 };
+
+    int _fd;
+    const uint8_t *_buffer;
+    uint32_t _pos;
+    uint32_t _len;
+
+    WritablePacket *_data_packet;
+
+#ifdef ALLOW_MMAP
+    bool _mmap;
+#endif
+
+#ifdef ALLOW_MMAP
+    enum { WANT_MMAP_UNIT = 4194304 }; // 4 MB
+    size_t _mmap_unit;
+    off_t _mmap_off;
+#endif
+
+    String _filename;
+    FILE *_pipe;
+    off_t _file_offset;
+    String _landmark_pattern;
+    int _lineno;
+
+#ifdef ALLOW_MMAP
+    int read_buffer_mmap(ErrorHandler *);
+#endif
+    int read_buffer(ErrorHandler *);
+    bool read_packet(ErrorHandler *);
+    int skip_ahead(ErrorHandler *);
+
+    static String filename_handler(Element *, void *);
+    static String filesize_handler(Element *, void *);
+    static String filepos_handler(Element *, void *);
+    static int filepos_write_handler(const String&, Element*, void*, ErrorHandler*);
+
+};
+
+CLICK_ENDDECLS
+#endif