volta.h
author Mahlon E. Smith <mahlon@martini.nu>
Mon, 07 Nov 2011 10:43:09 -0800
changeset 17 bd746609ba46
parent 15 2706fc514dea
child 18 d4ce82194b64
permissions -rw-r--r--
Retain the CDB struct between lookups, only freeing when reopening the db. Big, big speed boost.
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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/* vim: set noet nosta sw=4 ts=4 ft=c : */
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/*
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Copyright (c) 2011, Mahlon E. Smith <mahlon@martini.nu>
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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    * Redistributions of source code must retain the above copyright
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      notice, this list of conditions and the following disclaimer.
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    * Redistributions in binary form must reproduce the above copyright
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      notice, this list of conditions and the following disclaimer in the
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      documentation and/or other materials provided with the distribution.
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    * Neither the name of Mahlon E. Smith nor the names of his
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      contributors may be used to endorse or promote products derived
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      from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND ANY
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EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE REGENTS AND CONTRIBUTORS BE LIABLE FOR ANY
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DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _VOLTA_H
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#define _VOLTA_H
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#ifndef PROG
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#define PROG    "volta"
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#endif
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#define VERSION "$Version$" /* expanded by mercurial */
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdarg.h>
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#include <errno.h>
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#include <string.h>
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#include <strings.h>
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#include <unistd.h>
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#include <ctype.h>
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#include <time.h>
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#include <sys/stat.h>
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#include <signal.h>
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#include <fcntl.h>
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#include <sys/types.h>
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#include <regex.h>
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/*
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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*/
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#include <cdb.h>
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#ifdef DEBUG
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#include <google/profiler.h>
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#endif
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/* Default line size we accept from squid, longer lines (huge URLs?) malloc. */
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#define LINE_BUFSIZE 2048
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/* Ceiling for how many bytes can be allocated at once for a single line. */
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#define LINE_MAX 256000 /* 250k */
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/* Parsed line types */
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#define REQUEST 1
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#define RULE 2
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/* Aid debugging */
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#define LOC __FILE__, __LINE__
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/*
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 * a global struct for easy access to common vars 
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 *
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 */
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struct v_globals {
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	unsigned short int debugmode; /* debug level */
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	char dbname[128];             /* path to database file */
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	short int db_fd;              /* opened db file descriptor */
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	struct cdb db;                /* the cdb struct */
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	struct {
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		time_t start;             /* start time */
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		unsigned long int lines;  /* line count for determining speed */
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		time_t db_lastcheck;      /* reopen db time */
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	} timer;
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};
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extern struct v_globals v;        /* defined in main.c */
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/*
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 * A line of parsed ascii DB input, for conversion into cdb.
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 *
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 */
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struct db_input {
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	unsigned int klen;
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	unsigned int vlen;
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	char *key;
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	char *val;
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	char *kstart;
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	char *vstart;
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};
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/*
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 * The parsed attributes from the request line as given to us by squid,
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 * or from the rule string found in the database.  Unparsed
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 * members are just left NULL.
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 *
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 */
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typedef struct parsed {
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	unsigned short int type;
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	unsigned short int wl;
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	char   *path_re;
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	char   *redir;
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	char   *scheme;
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	char   *host;
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	char   *tld;
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	char   *path;
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	char   *port;
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	/* struct in_addr *client_ip; */
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	char   *client_ip;
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	char   *user;
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	char   *method;
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	struct {
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		char *path_re_start;
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		char *redir_start;
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		char *scheme_start;
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		char *host_start;
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		char *port_start;
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		char *path_start;
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		char *meth_start;
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		char *c_ip_start;
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		unsigned short int path_re_length;
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		unsigned short int redir_length;
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		unsigned short int scheme_length;
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		unsigned short int host_length;
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		unsigned short int port_length;
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		unsigned int       path_length;
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		unsigned short int meth_length;
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		unsigned short int c_ip_length;
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	} tokens;
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} parsed;
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/*
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 *
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 * Function prototypes
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 *
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 */
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int  getopt( int, char * const [], const char *);
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void shutdown_handler( int );
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void shutdown_actions( void );
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void usage( char * );
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void debug( int, char *, int, const char *, ... );
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void out( const char * );
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void reverse_str( char * );
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void lowercase_str( char *, unsigned short int );
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void report_speed( void );
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char *slurp_file( char * );
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char *extend_line( char *, const char * );
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char *copy_string_token( char *, unsigned short int );
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/* struct in_addr *copy_ipv4_token( char *, unsigned short int ); */
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int  accept_loop( void );
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void process( char * );
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parsed *init_parsed( void );
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parsed *parse_request( char * );
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parsed *parse_rule( char * );
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void populate_parsed( parsed * );
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void parse_tld( parsed * );
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void finish_parsed( parsed * );
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void reset_results( parsed **, unsigned int );
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unsigned short int check_rule( parsed *, parsed * );
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void rewrite( parsed *, parsed * );
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#endif
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