nbdsrv.c File Reference

#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>

Go to the source code of this file.

Macros
#define	LINELEN   256
	Size of static buffer used to read the authorization file (yuck) More...

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

Macro Definition Documentation

#define LINELEN   256

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

Definition at line 24 of file nbdsrv.c.

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 30 of file nbdsrv.c.

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 110 of file nbdsrv.c.

References msg.

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 154 of file nbdsrv.c.

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 237 of file nbdsrv.c.

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 98 of file nbdsrv.c.

Referenced by set_peername().

void myseek	(	int	handle,
		off_t	a
	)

seek to a position in a file, with error handling.

Parameters

handle	a filedescriptor
a	position to seek to

Todo:

get rid of this.

Definition at line 289 of file nbdsrv.c.

References err().

Referenced by expread(), expwrite(), and open_treefile().

uint64_t size_autodetect

(

int

fhandle

)

Detect the size of a file.

Parameters

fhandle

An open filedescriptor

Returns

the size of the file, or UINT64_MAX if detection was impossible.

Definition at line 196 of file nbdsrv.c.

Referenced by setupexport().