#include "lfs.h"
#include <glib.h>
#include <stdbool.h>
#include <stdint.h>
#include <sys/socket.h>
#include <sys/types.h>

Data Structures
struct	SERVER
	Variables associated with a server. More...

struct	CLIENT
	Variables associated with a client connection. More...

Macros
#define	NBDS_ERR g_quark_from_static_string("server-error-quark")
	Error domain common for all NBD server errors. More...

#define	msg(prio, ...) g_log(G_LOG_DOMAIN, G_LOG_LEVEL_MESSAGE, __VA_ARGS__)
	Logging macros. More...

#define	MY_NAME "nbd_server"

Enumerations
enum	VIRT_STYLE { VIRT_NONE =0, VIRT_IPLIT, VIRT_IPHASH, VIRT_CIDR }
	Types of virtuatlization. More...

enum	NBDS_ERRS { NBDS_ERR_CFILE_NOTFOUND, NBDS_ERR_CFILE_MISSING_GENERIC, NBDS_ERR_CFILE_KEY_MISSING, NBDS_ERR_CFILE_VALUE_INVALID, NBDS_ERR_CFILE_VALUE_UNSUPPORTED, NBDS_ERR_CFILE_NO_EXPORTS, NBDS_ERR_CFILE_INCORRECT_PORT, NBDS_ERR_CFILE_DIR_UNKNOWN, NBDS_ERR_CFILE_READDIR_ERR, NBDS_ERR_SO_LINGER, NBDS_ERR_SO_REUSEADDR, NBDS_ERR_SO_KEEPALIVE, NBDS_ERR_GAI, NBDS_ERR_SOCKET, NBDS_ERR_BIND, NBDS_ERR_LISTEN, NBDS_ERR_SYS }
	NBD server error codes. 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) G_GNUC_PURE
	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...

int	append_serve (const SERVER const s, GArray const a)
	append new server to array More...

uint64_t	size_autodetect (int fhandle)
	Detect the size of a file. More...

Macro Definition Documentation

#define msg	(	prio,
		...
	)	g_log(G_LOG_DOMAIN, G_LOG_LEVEL_MESSAGE, __VA_ARGS__)

Logging macros.

Todo:: remove this. We should use g_log in all cases, and use the logging mangler to redirect to syslog if and when necessary.

Definition at line 117 of file nbdsrv.h.

Referenced by authorized_client(), copyonwrite_prepare(), handle_modern_connection(), handle_oldstyle_connection(), mainloop(), serveloop(), set_peername(), setup_servers(), setupexport(), and spawn_child().

#define MY_NAME "nbd_server"

Definition at line 119 of file nbdsrv.h.

#define NBDS_ERR g_quark_from_static_string("server-error-quark")

Error domain common for all NBD server errors.

Definition at line 81 of file nbdsrv.h.

Referenced by do_cfile_dir(), dosockopts(), main(), open_modern(), open_unix(), parse_cfile(), and setup_serve().

Enumeration Type Documentation

enum NBDS_ERRS

NBD server error codes.

Enumerator
NBDS_ERR_CFILE_NOTFOUND	The configuration file is not found.
NBDS_ERR_CFILE_MISSING_GENERIC	The (required) group "generic" is missing.
NBDS_ERR_CFILE_KEY_MISSING	A (required) key is missing.
NBDS_ERR_CFILE_VALUE_INVALID	A value is syntactically invalid.
NBDS_ERR_CFILE_VALUE_UNSUPPORTED	A value is not supported in this build.
NBDS_ERR_CFILE_NO_EXPORTS	A config file was specified that does not define any exports.
NBDS_ERR_CFILE_INCORRECT_PORT	The reserved port was specified for an old-style export.
NBDS_ERR_CFILE_DIR_UNKNOWN	A directory requested does not exist.
NBDS_ERR_CFILE_READDIR_ERR	Error occurred during readdir()
NBDS_ERR_SO_LINGER	Failed to set SO_LINGER to a socket.
NBDS_ERR_SO_REUSEADDR	Failed to set SO_REUSEADDR to a socket.
NBDS_ERR_SO_KEEPALIVE	Failed to set SO_KEEPALIVE to a socket.
NBDS_ERR_GAI	Failed to get address info.
NBDS_ERR_SOCKET	Failed to create a socket.
NBDS_ERR_BIND	Failed to bind an address to socket.
NBDS_ERR_LISTEN	Failed to start listening on a socket.
NBDS_ERR_SYS	Underlying system call or library error.

Definition at line 86 of file nbdsrv.h.

enum VIRT_STYLE

Types of virtuatlization.

Enumerator
VIRT_NONE	No virtualization.
VIRT_IPLIT	Literal IP address as part of the filename.
VIRT_IPHASH	Replacing all dots in an ip address by a / before doing the same as in IPLIT.
VIRT_CIDR	Every subnet in its own directory.

Definition at line 18 of file nbdsrv.h.

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 25 of file nbdsrv.c.

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 192 of file nbdsrv.c.

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 105 of file nbdsrv.c.

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

Referenced by getmaskbyte(), 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 149 of file nbdsrv.c.

Referenced by authorized_client().

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 93 of file nbdsrv.c.

References authorized_client().

Referenced by 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 252 of file nbdsrv.c.

Referenced by setupexport().

Data Structures

Macros

Enumerations

Functions

Macro Definition Documentation

Enumeration Type Documentation

Function Documentation