From 3b653205cf7bd3851befd0a9f6a3ded6e267c173 Mon Sep 17 00:00:00 2001 From: Lennart Poettering Date: Thu, 10 Jul 2014 21:15:26 +0200 Subject: shared: split out in_addr related calls from socket-util.[ch] into its private in-addr-util.[ch] These are enough calls for a new file, and they are sufficiently different from the sockaddr-related calls, hence let's split this out. --- src/shared/in-addr-util.c | 211 ++++++++++++++++++++++++++++++++++++++++++++++ src/shared/in-addr-util.h | 44 ++++++++++ src/shared/socket-util.c | 187 ---------------------------------------- src/shared/socket-util.h | 17 ---- 4 files changed, 255 insertions(+), 204 deletions(-) create mode 100644 src/shared/in-addr-util.c create mode 100644 src/shared/in-addr-util.h (limited to 'src/shared') diff --git a/src/shared/in-addr-util.c b/src/shared/in-addr-util.c new file mode 100644 index 0000000000..98d2446e5d --- /dev/null +++ b/src/shared/in-addr-util.c @@ -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 . +***/ + +#include + +#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; +} diff --git a/src/shared/in-addr-util.h b/src/shared/in-addr-util.h new file mode 100644 index 0000000000..ae3aa9021d --- /dev/null +++ b/src/shared/in-addr-util.h @@ -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 . +***/ + +#include + +#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; +} diff --git a/src/shared/socket-util.c b/src/shared/socket-util.c index 6f4979853e..92564e3193 100644 --- a/src/shared/socket-util.c +++ b/src/shared/socket-util.c @@ -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", diff --git a/src/shared/socket-util.h b/src/shared/socket-util.h index 8d521ae1a0..ec85d949ce 100644 --- a/src/shared/socket-util.h +++ b/src/shared/socket-util.h @@ -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; -} -- cgit v1.2.3-54-g00ecf