network-manager-wireguard-u.../shared/nm-utils/nm-shared-utils.h

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2017-11-06 15:02:05 +03:00
/* -*- Mode: C; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4 -*- */
/* NetworkManager -- Network link manager
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301 USA.
*
* (C) Copyright 2016 Red Hat, Inc.
*/
#ifndef __NM_SHARED_UTILS_H__
#define __NM_SHARED_UTILS_H__
#include <netinet/in.h>
/*****************************************************************************/
typedef struct {
union {
guint8 addr_ptr[1];
in_addr_t addr4;
struct in6_addr addr6;
/* NMIPAddr is really a union for IP addresses.
* However, as ethernet addresses fit in here nicely, use
* it also for an ethernet MAC address. */
guint8 addr_eth[6 /*ETH_ALEN*/];
};
} NMIPAddr;
extern const NMIPAddr nm_ip_addr_zero;
/*****************************************************************************/
#define NM_CMP_RETURN(c) \
G_STMT_START { \
const int _cc = (c); \
if (_cc) \
return _cc < 0 ? -1 : 1; \
} G_STMT_END
#define NM_CMP_SELF(a, b) \
G_STMT_START { \
typeof (a) _a = (a); \
typeof (b) _b = (b); \
\
if (_a == _b) \
return 0; \
if (!_a) \
return -1; \
if (!_b) \
return 1; \
} G_STMT_END
#define NM_CMP_DIRECT(a, b) \
G_STMT_START { \
typeof (a) _a = (a); \
typeof (b) _b = (b); \
\
if (_a != _b) \
return (_a < _b) ? -1 : 1; \
} G_STMT_END
#define NM_CMP_DIRECT_MEMCMP(a, b, size) \
NM_CMP_RETURN (memcmp ((a), (b), (size)))
#define NM_CMP_DIRECT_IN6ADDR(a, b) \
G_STMT_START { \
const struct in6_addr *const _a = (a); \
const struct in6_addr *const _b = (b); \
NM_CMP_RETURN (memcmp (_a, _b, sizeof (struct in6_addr))); \
} G_STMT_END
#define NM_CMP_FIELD(a, b, field) \
NM_CMP_DIRECT (((a)->field), ((b)->field))
#define NM_CMP_FIELD_UNSAFE(a, b, field) \
G_STMT_START { \
/* it's unsafe, because it evaluates the arguments more then once.
* This is necessary for bitfields, for which typeof() doesn't work. */ \
if (((a)->field) != ((b)->field)) \
return ((a)->field < ((b)->field)) ? -1 : 1; \
} G_STMT_END
#define NM_CMP_FIELD_BOOL(a, b, field) \
NM_CMP_DIRECT (!!((a)->field), !!((b)->field))
#define NM_CMP_FIELD_STR(a, b, field) \
NM_CMP_RETURN (strcmp (((a)->field), ((b)->field)))
#define NM_CMP_FIELD_STR_INTERNED(a, b, field) \
G_STMT_START { \
const char *_a = ((a)->field); \
const char *_b = ((b)->field); \
\
if (_a != _b) { \
NM_CMP_RETURN (g_strcmp0 (_a, _b)); \
} \
} G_STMT_END
#define NM_CMP_FIELD_STR0(a, b, field) \
NM_CMP_RETURN (g_strcmp0 (((a)->field), ((b)->field)))
#define NM_CMP_FIELD_MEMCMP_LEN(a, b, field, len) \
NM_CMP_RETURN (memcmp (&((a)->field), &((b)->field), \
MIN (len, sizeof ((a)->field))))
#define NM_CMP_FIELD_MEMCMP(a, b, field) \
NM_CMP_RETURN (memcmp (&((a)->field), \
&((b)->field), \
sizeof ((a)->field)))
#define NM_CMP_FIELD_IN6ADDR(a, b, field) \
G_STMT_START { \
const struct in6_addr *const _a = &((a)->field); \
const struct in6_addr *const _b = &((b)->field); \
NM_CMP_RETURN (memcmp (_a, _b, sizeof (struct in6_addr))); \
} G_STMT_END
/*****************************************************************************/
extern const void *const _NM_PTRARRAY_EMPTY[1];
#define NM_PTRARRAY_EMPTY(type) ((type const*) _NM_PTRARRAY_EMPTY)
static inline void
_nm_utils_strbuf_init (char *buf, gsize len, char **p_buf_ptr, gsize *p_buf_len)
{
NM_SET_OUT (p_buf_len, len);
NM_SET_OUT (p_buf_ptr, buf);
buf[0] = '\0';
}
#define nm_utils_strbuf_init(buf, p_buf_ptr, p_buf_len) \
G_STMT_START { \
G_STATIC_ASSERT (G_N_ELEMENTS (buf) == sizeof (buf) && sizeof (buf) > sizeof (char *)); \
_nm_utils_strbuf_init ((buf), sizeof (buf), (p_buf_ptr), (p_buf_len)); \
} G_STMT_END
void nm_utils_strbuf_append (char **buf, gsize *len, const char *format, ...) _nm_printf (3, 4);
void nm_utils_strbuf_append_c (char **buf, gsize *len, char c);
void nm_utils_strbuf_append_str (char **buf, gsize *len, const char *str);
/*****************************************************************************/
const char **nm_utils_strsplit_set (const char *str, const char *delimiters);
gssize nm_utils_strv_find_first (char **list, gssize len, const char *needle);
char **_nm_utils_strv_cleanup (char **strv,
gboolean strip_whitespace,
gboolean skip_empty,
gboolean skip_repeated);
/*****************************************************************************/
guint32 _nm_utils_ip4_prefix_to_netmask (guint32 prefix);
guint32 _nm_utils_ip4_get_default_prefix (guint32 ip);
gboolean nm_utils_ip_is_site_local (int addr_family,
const void *address);
/*****************************************************************************/
gboolean nm_utils_parse_inaddr_bin (const char *text,
int family,
gpointer out_addr);
gboolean nm_utils_parse_inaddr (const char *text,
int family,
char **out_addr);
gboolean nm_utils_parse_inaddr_prefix_bin (const char *text,
int family,
gpointer out_addr,
int *out_prefix);
gboolean nm_utils_parse_inaddr_prefix (const char *text,
int family,
char **out_addr,
int *out_prefix);
gint64 _nm_utils_ascii_str_to_int64 (const char *str, guint base, gint64 min, gint64 max, gint64 fallback);
gint _nm_utils_ascii_str_to_bool (const char *str,
gint default_value);
/*****************************************************************************/
#define _nm_g_slice_free_fcn_define(mem_size) \
static inline void \
_nm_g_slice_free_fcn_##mem_size (gpointer mem_block) \
{ \
g_slice_free1 (mem_size, mem_block); \
}
_nm_g_slice_free_fcn_define (1)
_nm_g_slice_free_fcn_define (2)
_nm_g_slice_free_fcn_define (4)
_nm_g_slice_free_fcn_define (8)
_nm_g_slice_free_fcn_define (12)
_nm_g_slice_free_fcn_define (16)
#define _nm_g_slice_free_fcn1(mem_size) \
({ \
void (*_fcn) (gpointer); \
\
/* If mem_size is a compile time constant, the compiler
* will be able to optimize this. Hence, you don't want
* to call this with a non-constant size argument. */ \
switch (mem_size) { \
case 1: _fcn = _nm_g_slice_free_fcn_1; break; \
case 2: _fcn = _nm_g_slice_free_fcn_2; break; \
case 4: _fcn = _nm_g_slice_free_fcn_4; break; \
case 8: _fcn = _nm_g_slice_free_fcn_8; break; \
case 12: _fcn = _nm_g_slice_free_fcn_12; break; \
case 16: _fcn = _nm_g_slice_free_fcn_16; break; \
default: g_assert_not_reached (); _fcn = NULL; break; \
} \
_fcn; \
})
/**
* nm_g_slice_free_fcn:
* @type: type argument for sizeof() operator that you would
* pass to g_slice_new().
*
* Returns: a function pointer with GDestroyNotify signature
* for g_slice_free(type,*).
*
* Only certain types are implemented. You'll get an assertion
* using the wrong type. */
#define nm_g_slice_free_fcn(type) (_nm_g_slice_free_fcn1 (sizeof (type)))
#define nm_g_slice_free_fcn_gint64 (nm_g_slice_free_fcn (gint64))
/*****************************************************************************/
/**
* NMUtilsError:
* @NM_UTILS_ERROR_UNKNOWN: unknown or unclassified error
* @NM_UTILS_ERROR_CANCELLED_DISPOSING: when disposing an object that has
* pending aynchronous operations, the operation is cancelled with this
* error reason. Depending on the usage, this might indicate a bug because
* usually the target object should stay alive as long as there are pending
* operations.
* @NM_UTILS_ERROR_INVALID_ARGUMENT: invalid argument.
*/
typedef enum {
NM_UTILS_ERROR_UNKNOWN = 0, /*< nick=Unknown >*/
NM_UTILS_ERROR_CANCELLED_DISPOSING, /*< nick=CancelledDisposing >*/
NM_UTILS_ERROR_INVALID_ARGUMENT, /*< nick=InvalidArgument >*/
} NMUtilsError;
#define NM_UTILS_ERROR (nm_utils_error_quark ())
GQuark nm_utils_error_quark (void);
void nm_utils_error_set_cancelled (GError **error,
gboolean is_disposing,
const char *instance_name);
gboolean nm_utils_error_is_cancelled (GError *error,
gboolean consider_is_disposing);
/*****************************************************************************/
gboolean nm_g_object_set_property (GObject *object,
const gchar *property_name,
const GValue *value,
GError **error);
GParamSpec *nm_g_object_class_find_property_from_gtype (GType gtype,
const char *property_name);
/*****************************************************************************/
typedef enum {
NM_UTILS_STR_UTF8_SAFE_FLAG_NONE = 0,
NM_UTILS_STR_UTF8_SAFE_FLAG_ESCAPE_CTRL = 0x0001,
NM_UTILS_STR_UTF8_SAFE_FLAG_ESCAPE_NON_ASCII = 0x0002,
} NMUtilsStrUtf8SafeFlags;
const char *nm_utils_str_utf8safe_escape (const char *str, NMUtilsStrUtf8SafeFlags flags, char **to_free);
const char *nm_utils_str_utf8safe_unescape (const char *str, char **to_free);
char *nm_utils_str_utf8safe_escape_cp (const char *str, NMUtilsStrUtf8SafeFlags flags);
char *nm_utils_str_utf8safe_unescape_cp (const char *str);
char *nm_utils_str_utf8safe_escape_take (char *str, NMUtilsStrUtf8SafeFlags flags);
/*****************************************************************************/
#endif /* __NM_SHARED_UTILS_H__ */