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 <cliserv.h>

Go to the source code of this file.

Defines
#define	LINELEN   256
	Size of static buffer used to read the authorization file (yuck)
Functions
bool	address_matches (const char *mask, const void *addr, int af, 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
int	append_serve (const SERVER *const s, GArray *const a)
	append new server to array
uint64_t	size_autodetect (int fhandle)
	Detect the size of a file.

---

Define Documentation

#define LINELEN   256

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

Definition at line 19 of file nbdsrv.c.

Referenced by authorized_client().

---

Function Documentation

bool address_matches	(	const char *	mask,
		const void *	addr,
		int	af,
		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, in network byte order
af	the address family of the passed address (AF_INET or AF_INET6)

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 24 of file nbdsrv.c.

References getmaskbyte(), NBDS_ERR, and NBDS_ERR_GAI.

Referenced by authorized_client().

int append_serve	(	const SERVER *const	s,
		GArray *const	a
	)

append new server to array

Parameters:

s	server
a	server array

Returns:

0 success, -1 error

Definition at line 190 of file nbdsrv.c.

References dup_serve(), SERVER::listenaddr, SERVER::port, and SERVER::socket_family.

Referenced by append_new_servers(), main(), and parse_cfile().

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 102 of file nbdsrv.c.

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

Referenced by handle_modern_connection(), and handle_oldstyle_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 147 of file nbdsrv.c.

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

Referenced by append_serve().

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 90 of file nbdsrv.c.

Referenced by address_matches(), and set_peername().

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 250 of file nbdsrv.c.

References __attribute__, and DEBUG.

Referenced by setupexport().