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shared: split out in_addr related calls from socket-util.[ch] into its private in-addr-util.[ch]

Browse Source 
These are enough calls for a new file, and they are sufficiently
different from the sockaddr-related calls, hence let's split this out.
This commit is contained in:
Lennart Poettering 2014-07-10 21:15:26 +02:00
parent e80af1bddd
commit 3b653205cf
10 changed files with 262 additions and 208 deletions
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2
Makefile.am
View File

@ -765,6 +765,8 @@ libsystemd_shared_la_SOURCES = \
src/shared/pager.h \
src/shared/socket-util.c \
src/shared/socket-util.h \
src/shared/in-addr-util.c \
src/shared/in-addr-util.h \
src/shared/conf-files.c \
src/shared/conf-files.h \
src/shared/cgroup-util.c \

2
src/libsystemd/sd-rtnl/local-addresses.h
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@ -26,7 +26,7 @@
#include <assert.h>
#include <sys/socket.h>
#include "socket-util.h"
#include "in-addr-util.h"
struct local_address {
int ifindex;

2
src/machine/machine-dbus.c
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@ -32,7 +32,7 @@
#include "bus-errors.h"
#include "copy.h"
#include "fileio.h"
#include "socket-util.h"
#include "in-addr-util.h"
#include "machine.h"
static int property_get_id(

2
src/network/networkd.h
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@ -38,7 +38,7 @@
#include "list.h"
#include "set.h"
#include "condition-util.h"
#include "socket-util.h"
#include "in-addr-util.h"
#define CACHE_INFO_INFINITY_LIFE_TIME 0xFFFFFFFFU
#define VXLAN_VID_MAX (1u << 24) - 1

2
src/resolve/resolved.h
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@ -26,7 +26,7 @@
#include "util.h"
#include "list.h"
#include "socket-util.h"
#include "in-addr-util.h"
typedef struct Address Address;
typedef struct Manager Manager;

211
src/shared/in-addr-util.c Normal file
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@ -0,0 +1,211 @@
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
/***
This file is part of systemd.
Copyright 2014 Lennart Poettering
systemd 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 2.1 of the License, or
(at your option) any later version.
systemd 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 systemd; If not, see <http://www.gnu.org/licenses/>.
***/
#include <arpa/inet.h>
#include "in-addr-util.h"
int in_addr_null(unsigned family, union in_addr_union *u) {
assert(u);
if (family == AF_INET)
return u->in.s_addr == 0;
if (family == AF_INET6)
return
u->in6.s6_addr32[0] == 0 &&
u->in6.s6_addr32[1] == 0 &&
u->in6.s6_addr32[2] == 0 &&
u->in6.s6_addr32[3] == 0;
return -EAFNOSUPPORT;
}
int in_addr_equal(unsigned family, union in_addr_union *a, union in_addr_union *b) {
assert(a);
assert(b);
if (family == AF_INET)
return a->in.s_addr == b->in.s_addr;
if (family == AF_INET6)
return
a->in6.s6_addr32[0] == b->in6.s6_addr32[0] &&
a->in6.s6_addr32[1] == b->in6.s6_addr32[1] &&
a->in6.s6_addr32[2] == b->in6.s6_addr32[2] &&
a->in6.s6_addr32[3] == b->in6.s6_addr32[3];
return -EAFNOSUPPORT;
}
int in_addr_prefix_intersect(
unsigned family,
const union in_addr_union *a,
unsigned aprefixlen,
const union in_addr_union *b,
unsigned bprefixlen) {
unsigned m;
assert(a);
assert(b);
/* Checks whether there are any addresses that are in both
* networks */
m = MIN(aprefixlen, bprefixlen);
if (family == AF_INET) {
uint32_t x, nm;
x = be32toh(a->in.s_addr ^ b->in.s_addr);
nm = (m == 0) ? 0 : 0xFFFFFFFFUL << (32 - m);
return (x & nm) == 0;
}
if (family == AF_INET6) {
unsigned i;
if (m > 128)
m = 128;
for (i = 0; i < 16; i++) {
uint8_t x, nm;
x = a->in6.s6_addr[i] ^ b->in6.s6_addr[i];
if (m < 8)
nm = 0xFF << (8 - m);
else
nm = 0xFF;
if ((x & nm) != 0)
return 0;
if (m > 8)
m -= 8;
else
m = 0;
}
return 1;
}
return -EAFNOSUPPORT;
}
int in_addr_prefix_next(unsigned family, union in_addr_union *u, unsigned prefixlen) {
assert(u);
/* Increases the network part of an address by one. Returns
* positive it that succeeds, or 0 if this overflows. */
if (prefixlen <= 0)
return 0;
if (family == AF_INET) {
uint32_t c, n;
if (prefixlen > 32)
prefixlen = 32;
c = be32toh(u->in.s_addr);
n = c + (1UL << (32 - prefixlen));
if (n < c)
return 0;
n &= 0xFFFFFFFFUL << (32 - prefixlen);
u->in.s_addr = htobe32(n);
return 1;
}
if (family == AF_INET6) {
struct in6_addr add = {}, result;
uint8_t overflow = 0;
unsigned i;
if (prefixlen > 128)
prefixlen = 128;
/* First calculate what we have to add */
add.s6_addr[(prefixlen-1) / 8] = 1 << (7 - (prefixlen-1) % 8);
for (i = 16; i > 0; i--) {
unsigned j = i - 1;
result.s6_addr[j] = u->in6.s6_addr[j] + add.s6_addr[j] + overflow;
overflow = (result.s6_addr[j] < u->in6.s6_addr[j]);
}
if (overflow)
return 0;
u->in6 = result;
return 1;
}
return -EAFNOSUPPORT;
}
int in_addr_to_string(unsigned family, const union in_addr_union *u, char **ret) {
char *x;
size_t l;
assert(u);
assert(ret);
if (family == AF_INET)
l = INET_ADDRSTRLEN;
else if (family == AF_INET6)
l = INET6_ADDRSTRLEN;
else
return -EAFNOSUPPORT;
x = new(char, l);
if (!x)
return -ENOMEM;
errno = 0;
if (!inet_ntop(family, u, x, l)) {
free(x);
return errno ? -errno : -EINVAL;
}
*ret = x;
return 0;
}
int in_addr_from_string(unsigned family, const char *s, union in_addr_union *ret) {
assert(s);
assert(ret);
if (!IN_SET(family, AF_INET, AF_INET6))
return -EAFNOSUPPORT;
errno = 0;
if (inet_pton(family, s, ret) <= 0)
return errno ? -errno : -EINVAL;
return 0;
}

44
src/shared/in-addr-util.h Normal file
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@ -0,0 +1,44 @@
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
#pragma once
/***
This file is part of systemd.
Copyright 2014 Lennart Poettering
systemd 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 2.1 of the License, or
(at your option) any later version.
systemd 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 systemd; If not, see <http://www.gnu.org/licenses/>.
***/
#include <netinet/in.h>
#include "macro.h"
#include "util.h"
union in_addr_union {
struct in_addr in;
struct in6_addr in6;
};
int in_addr_null(unsigned family, union in_addr_union *u);
int in_addr_equal(unsigned family, union in_addr_union *a, union in_addr_union *b);
int in_addr_prefix_intersect(unsigned family, const union in_addr_union *a, unsigned aprefixlen, const union in_addr_union *b, unsigned bprefixlen);
int in_addr_prefix_next(unsigned family, union in_addr_union *u, unsigned prefixlen);
int in_addr_to_string(unsigned family, const union in_addr_union *u, char **ret);
int in_addr_from_string(unsigned family, const char *s, union in_addr_union *ret);
static inline size_t PROTO_ADDRESS_SIZE(int proto) {
assert(proto == AF_INET || proto == AF_INET6);
return proto == AF_INET6 ? 16 : 4;
}

187
src/shared/socket-util.c
View File

@ -640,193 +640,6 @@ int socket_address_unlink(SocketAddress *a) {
return 1;
}
int in_addr_null(unsigned family, union in_addr_union *u) {
assert(u);
if (family == AF_INET)
return u->in.s_addr == 0;
if (family == AF_INET6)
return
u->in6.s6_addr32[0] == 0 &&
u->in6.s6_addr32[1] == 0 &&
u->in6.s6_addr32[2] == 0 &&
u->in6.s6_addr32[3] == 0;
return -EAFNOSUPPORT;
}
int in_addr_equal(unsigned family, union in_addr_union *a, union in_addr_union *b) {
assert(a);
assert(b);
if (family == AF_INET)
return a->in.s_addr == b->in.s_addr;
if (family == AF_INET6)
return
a->in6.s6_addr32[0] == b->in6.s6_addr32[0] &&
a->in6.s6_addr32[1] == b->in6.s6_addr32[1] &&
a->in6.s6_addr32[2] == b->in6.s6_addr32[2] &&
a->in6.s6_addr32[3] == b->in6.s6_addr32[3];
return -EAFNOSUPPORT;
}
int in_addr_prefix_intersect(
unsigned family,
const union in_addr_union *a,
unsigned aprefixlen,
const union in_addr_union *b,
unsigned bprefixlen) {
unsigned m;
assert(a);
assert(b);
/* Checks whether there are any addresses that are in both
* networks */
m = MIN(aprefixlen, bprefixlen);
if (family == AF_INET) {
uint32_t x, nm;
x = be32toh(a->in.s_addr ^ b->in.s_addr);
nm = (m == 0) ? 0 : 0xFFFFFFFFUL << (32 - m);
return (x & nm) == 0;
}
if (family == AF_INET6) {
unsigned i;
if (m > 128)
m = 128;
for (i = 0; i < 16; i++) {
uint8_t x, nm;
x = a->in6.s6_addr[i] ^ b->in6.s6_addr[i];
if (m < 8)
nm = 0xFF << (8 - m);
else
nm = 0xFF;
if ((x & nm) != 0)
return 0;
if (m > 8)
m -= 8;
else
m = 0;
}
return 1;
}
return -EAFNOSUPPORT;
}
int in_addr_prefix_next(unsigned family, union in_addr_union *u, unsigned prefixlen) {
assert(u);
/* Increases the network part of an address by one. Returns
* positive it that succeeds, or 0 if this overflows. */
if (prefixlen <= 0)
return 0;
if (family == AF_INET) {
uint32_t c, n;
if (prefixlen > 32)
prefixlen = 32;
c = be32toh(u->in.s_addr);
n = c + (1UL << (32 - prefixlen));
if (n < c)
return 0;
n &= 0xFFFFFFFFUL << (32 - prefixlen);
u->in.s_addr = htobe32(n);
return 1;
}
if (family == AF_INET6) {
struct in6_addr add = {}, result;
uint8_t overflow = 0;
unsigned i;
if (prefixlen > 128)
prefixlen = 128;
/* First calculate what we have to add */
add.s6_addr[(prefixlen-1) / 8] = 1 << (7 - (prefixlen-1) % 8);
for (i = 16; i > 0; i--) {
unsigned j = i - 1;
result.s6_addr[j] = u->in6.s6_addr[j] + add.s6_addr[j] + overflow;
overflow = (result.s6_addr[j] < u->in6.s6_addr[j]);
}
if (overflow)
return 0;
u->in6 = result;
return 1;
}
return -EAFNOSUPPORT;
}
int in_addr_to_string(unsigned family, const union in_addr_union *u, char **ret) {
char *x;
size_t l;
assert(u);
assert(ret);
if (family == AF_INET)
l = INET_ADDRSTRLEN;
else if (family == AF_INET6)
l = INET6_ADDRSTRLEN;
else
return -EAFNOSUPPORT;
x = new(char, l);
if (!x)
return -ENOMEM;
errno = 0;
if (!inet_ntop(family, u, x, l)) {
free(x);
return errno ? -errno : -EINVAL;
}
*ret = x;
return 0;
}
int in_addr_from_string(unsigned family, const char *s, union in_addr_union *ret) {
assert(s);
assert(ret);
if (!IN_SET(family, AF_INET, AF_INET6))
return -EAFNOSUPPORT;
errno = 0;
if (inet_pton(family, s, ret) <= 0)
return errno ? -errno : -EINVAL;
return 0;
}
static const char* const netlink_family_table[] = {
[NETLINK_ROUTE] = "route",
[NETLINK_FIREWALL] = "firewall",

17
src/shared/socket-util.h
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@ -41,11 +41,6 @@ union sockaddr_union {
struct sockaddr_ll ll;
};
union in_addr_union {
struct in_addr in;
struct in6_addr in6;
};
typedef struct SocketAddress {
union sockaddr_union sockaddr;
@ -111,15 +106,3 @@ SocketAddressBindIPv6Only socket_address_bind_ipv6_only_from_string(const char *
int netlink_family_to_string_alloc(int b, char **s);
int netlink_family_from_string(const char *s) _pure_;
int in_addr_null(unsigned family, union in_addr_union *u);
int in_addr_equal(unsigned family, union in_addr_union *a, union in_addr_union *b);
int in_addr_prefix_intersect(unsigned family, const union in_addr_union *a, unsigned aprefixlen, const union in_addr_union *b, unsigned bprefixlen);
int in_addr_prefix_next(unsigned family, union in_addr_union *u, unsigned prefixlen);
int in_addr_to_string(unsigned family, const union in_addr_union *u, char **ret);
int in_addr_from_string(unsigned family, const char *s, union in_addr_union *ret);
static inline size_t PROTO_ADDRESS_SIZE(int proto) {
assert(proto == AF_INET || proto == AF_INET6);
return proto == AF_INET6 ? 16 : 4;
}

1
src/test/test-socket-util.c
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@ -18,6 +18,7 @@
***/
#include "socket-util.h"
#include "in-addr-util.h"
#include "util.h"
#include "macro.h"
#include "log.h"