#include "config.h"
#include "nbd-debug.h"
#include <nbdsrv.h>
#include <assert.h>
#include <ctype.h>
#include <netdb.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <syslog.h>
#include <unistd.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <treefiles.h>
#include "backend.h"
#include <sys/mount.h>
#include <cliserv.h>

Defines
#define	LINELEN 256
	Size of static buffer used to read the authorization file (yuck)
Functions
bool	address_matches (const char mask, const struct sockaddr addr, GError **err)
	Check whether a given address matches a given netmask.
uint8_t	getmaskbyte (int masklen)
	Gets a byte to allow for address masking.
int	authorized_client (CLIENT *opts)
	Check whether a client is allowed to connect.
SERVER *	dup_serve (const SERVER *const s)
	duplicate server
uint64_t	size_autodetect (int fhandle)
	Detect the size of a file.
int	exptrim (struct nbd_request req, CLIENT client)
	Punch a hole in the backend file (if supported by the current system).
void	myseek (int handle, off_t a)
	seek to a position in a file, with error handling.

Define Documentation

#define LINELEN 256

Size of static buffer used to read the authorization file (yuck)

Definition at line 24 of file nbdsrv.c.

Referenced by authorized_client().

Function Documentation

bool address_matches	(	const char *	mask,
		const struct sockaddr *	addr,
		GError **	err
	)

Check whether a given address matches a given netmask.

Parameters:

mask	the address or netmask to check against, in ASCII representation
addr	the address to check

Returns:: true if the address matches the mask, false otherwise; in case of failure to parse netmask, returns false with err set appropriately.

Todo:: decide what to do with v6-mapped IPv4 addresses.

Definition at line 29 of file nbdsrv.c.

References getmaskbyte(), NBDS_ERR, and NBDS_ERR_GAI.

Referenced by authorized_client().

int authorized_client ( CLIENT * opts )

Check whether a client is allowed to connect.

Works with an authorization file which contains one line per machine or network, with CIDR-style netmasks.

Parameters:

opts	The client who's trying to connect.

Returns:: 0 - authorization refused, 1 - OK

Definition at line 113 of file nbdsrv.c.

References address_matches(), SERVER::authname, CLIENT::clientaddr, LINELEN, msg, and CLIENT::server.

Referenced by handle_modern_connection().

SERVER* dup_serve ( const SERVER *const s )

duplicate server

Parameters:

s	the old server we want to duplicate

Returns:: new duplicated server

Definition at line 157 of file nbdsrv.c.

References SERVER::authname, SERVER::cidrlen, SERVER::cowdir, SERVER::expected_size, SERVER::exportname, SERVER::flags, SERVER::listenaddr, SERVER::max_connections, SERVER::postrun, SERVER::prerun, SERVER::servename, SERVER::transactionlog, and SERVER::virtstyle.

int exptrim	(	struct nbd_request *	req,
		CLIENT *	client
	)

Punch a hole in the backend file (if supported by the current system).

Parameters:

req	the request for which this is being processed
client	the client for which we're processing this request

Definition at line 240 of file nbdsrv.c.

References DEBUG, delete_treefile(), CLIENT::export, CLIENT::exportname, CLIENT::exportsize, F_COPYONWRITE, F_READONLY, F_TREEFILES, FILE_INFO::fhandle, SERVER::flags, nbd_request::from, nbd_request::len, punch_hole(), CLIENT::server, FILE_INFO::startoff, and TREEPAGESIZE.

Referenced by handle_trim(), and mainloop().

uint8_t getmaskbyte ( int masklen )

Gets a byte to allow for address masking.

Parameters:

masklen the length of the requested mask.

Returns:: if the length of the mask is 8 or longer, 0xFF. Otherwise, a byte with `masklen' number of leading bits set to 1, everything else set to 0.

Definition at line 101 of file nbdsrv.c.

Referenced by address_matches(), and set_peername().