diff options
Diffstat (limited to 'src/network/networkd-address.c')
| -rw-r--r-- | src/network/networkd-address.c | 635 |
1 files changed, 0 insertions, 635 deletions
diff --git a/src/network/networkd-address.c b/src/network/networkd-address.c deleted file mode 100644 index 85acc49945..0000000000 --- a/src/network/networkd-address.c +++ /dev/null @@ -1,635 +0,0 @@ -/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ - -/*** - This file is part of systemd. - - Copyright 2013 Tom Gundersen <teg@jklm.no> - - 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 <net/if.h> - -#include "utf8.h" -#include "util.h" -#include "conf-parser.h" -#include "fw-util.h" -#include "networkd.h" -#include "networkd-link.h" - -static void address_init(Address *address) { - assert(address); - - address->family = AF_UNSPEC; - address->scope = RT_SCOPE_UNIVERSE; - address->cinfo.ifa_prefered = CACHE_INFO_INFINITY_LIFE_TIME; - address->cinfo.ifa_valid = CACHE_INFO_INFINITY_LIFE_TIME; -} - -int address_new_static(Network *network, unsigned section, Address **ret) { - _cleanup_address_free_ Address *address = NULL; - - if (section) { - address = hashmap_get(network->addresses_by_section, UINT_TO_PTR(section)); - if (address) { - *ret = address; - address = NULL; - - return 0; - } - } - - address = new0(Address, 1); - if (!address) - return -ENOMEM; - - address_init(address); - - address->network = network; - - LIST_APPEND(addresses, network->static_addresses, address); - - if (section) { - address->section = section; - hashmap_put(network->addresses_by_section, - UINT_TO_PTR(address->section), address); - } - - *ret = address; - address = NULL; - - return 0; -} - -int address_new_dynamic(Address **ret) { - _cleanup_address_free_ Address *address = NULL; - - address = new0(Address, 1); - if (!address) - return -ENOMEM; - - address_init(address); - - *ret = address; - address = NULL; - - return 0; -} - -void address_free(Address *address) { - if (!address) - return; - - if (address->network) { - LIST_REMOVE(addresses, address->network->static_addresses, address); - - if (address->section) - hashmap_remove(address->network->addresses_by_section, - UINT_TO_PTR(address->section)); - } - - free(address); -} - -int address_establish(Address *address, Link *link) { - bool masq; - int r; - - assert(address); - assert(link); - - masq = link->network && - link->network->ip_masquerade && - address->family == AF_INET && - address->scope < RT_SCOPE_LINK; - - /* Add firewall entry if this is requested */ - if (address->ip_masquerade_done != masq) { - union in_addr_union masked = address->in_addr; - in_addr_mask(address->family, &masked, address->prefixlen); - - r = fw_add_masquerade(masq, AF_INET, 0, &masked, address->prefixlen, NULL, NULL, 0); - if (r < 0) - log_link_warning_errno(link, r, "Could not enable IP masquerading: %m"); - - address->ip_masquerade_done = masq; - } - - return 0; -} - -int address_release(Address *address, Link *link) { - int r; - - assert(address); - assert(link); - - /* Remove masquerading firewall entry if it was added */ - if (address->ip_masquerade_done) { - union in_addr_union masked = address->in_addr; - in_addr_mask(address->family, &masked, address->prefixlen); - - r = fw_add_masquerade(false, AF_INET, 0, &masked, address->prefixlen, NULL, NULL, 0); - if (r < 0) - log_link_warning_errno(link, r, "Failed to disable IP masquerading: %m"); - - address->ip_masquerade_done = false; - } - - return 0; -} - -int address_drop(Address *address, Link *link, - sd_rtnl_message_handler_t callback) { - _cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL; - int r; - - assert(address); - assert(address->family == AF_INET || address->family == AF_INET6); - assert(link); - assert(link->ifindex > 0); - assert(link->manager); - assert(link->manager->rtnl); - - address_release(address, link); - - r = sd_rtnl_message_new_addr(link->manager->rtnl, &req, RTM_DELADDR, - link->ifindex, address->family); - if (r < 0) - return log_error_errno(r, "Could not allocate RTM_DELADDR message: %m"); - - r = sd_rtnl_message_addr_set_prefixlen(req, address->prefixlen); - if (r < 0) - return log_error_errno(r, "Could not set prefixlen: %m"); - - if (address->family == AF_INET) - r = sd_rtnl_message_append_in_addr(req, IFA_LOCAL, &address->in_addr.in); - else if (address->family == AF_INET6) - r = sd_rtnl_message_append_in6_addr(req, IFA_LOCAL, &address->in_addr.in6); - if (r < 0) - return log_error_errno(r, "Could not append IFA_LOCAL attribute: %m"); - - r = sd_rtnl_call_async(link->manager->rtnl, req, callback, link, 0, NULL); - if (r < 0) - return log_error_errno(r, "Could not send rtnetlink message: %m"); - - link_ref(link); - - return 0; -} - -int address_update(Address *address, Link *link, - sd_rtnl_message_handler_t callback) { - _cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL; - int r; - - assert(address); - assert(address->family == AF_INET || address->family == AF_INET6); - assert(link->ifindex > 0); - assert(link->manager); - assert(link->manager->rtnl); - - r = sd_rtnl_message_new_addr_update(link->manager->rtnl, &req, - link->ifindex, address->family); - if (r < 0) - return log_error_errno(r, "Could not allocate RTM_NEWADDR message: %m"); - - r = sd_rtnl_message_addr_set_prefixlen(req, address->prefixlen); - if (r < 0) - return log_error_errno(r, "Could not set prefixlen: %m"); - - address->flags |= IFA_F_PERMANENT; - - r = sd_rtnl_message_addr_set_flags(req, address->flags & 0xff); - if (r < 0) - return log_error_errno(r, "Could not set flags: %m"); - - if (address->flags & ~0xff) { - r = sd_rtnl_message_append_u32(req, IFA_FLAGS, address->flags); - if (r < 0) - return log_error_errno(r, "Could not set extended flags: %m"); - } - - r = sd_rtnl_message_addr_set_scope(req, address->scope); - if (r < 0) - return log_error_errno(r, "Could not set scope: %m"); - - if (address->family == AF_INET) - r = sd_rtnl_message_append_in_addr(req, IFA_LOCAL, &address->in_addr.in); - else if (address->family == AF_INET6) - r = sd_rtnl_message_append_in6_addr(req, IFA_LOCAL, &address->in_addr.in6); - if (r < 0) - return log_error_errno(r, "Could not append IFA_LOCAL attribute: %m"); - - if (address->family == AF_INET) { - r = sd_rtnl_message_append_in_addr(req, IFA_BROADCAST, &address->broadcast); - if (r < 0) - return log_error_errno(r, "Could not append IFA_BROADCAST attribute: %m"); - } - - if (address->label) { - r = sd_rtnl_message_append_string(req, IFA_LABEL, address->label); - if (r < 0) - return log_error_errno(r, "Could not append IFA_LABEL attribute: %m"); - } - - r = sd_rtnl_message_append_cache_info(req, IFA_CACHEINFO, &address->cinfo); - if (r < 0) - return log_error_errno(r, "Could not append IFA_CACHEINFO attribute: %m"); - - r = sd_rtnl_call_async(link->manager->rtnl, req, callback, link, 0, NULL); - if (r < 0) - return log_error_errno(r, "Could not send rtnetlink message: %m"); - - link_ref(link); - - return 0; -} - -static int address_acquire(Link *link, Address *original, Address **ret) { - union in_addr_union in_addr = {}; - struct in_addr broadcast = {}; - _cleanup_address_free_ Address *na = NULL; - int r; - - assert(link); - assert(original); - assert(ret); - - /* Something useful was configured? just use it */ - if (in_addr_is_null(original->family, &original->in_addr) <= 0) - return 0; - - /* The address is configured to be 0.0.0.0 or [::] by the user? - * Then let's acquire something more useful from the pool. */ - r = manager_address_pool_acquire(link->manager, original->family, original->prefixlen, &in_addr); - if (r < 0) { - log_link_error(link, "Failed to acquire address from pool: %s", strerror(-r)); - return r; - } - if (r == 0) { - log_link_error(link, "Couldn't find free address for interface, all taken."); - return -EBUSY; - } - - if (original->family == AF_INET) { - /* Pick first address in range for ourselves ... */ - in_addr.in.s_addr = in_addr.in.s_addr | htobe32(1); - - /* .. and use last as broadcast address */ - broadcast.s_addr = in_addr.in.s_addr | htobe32(0xFFFFFFFFUL >> original->prefixlen); - } else if (original->family == AF_INET6) - in_addr.in6.s6_addr[15] |= 1; - - r = address_new_dynamic(&na); - if (r < 0) - return r; - - na->family = original->family; - na->prefixlen = original->prefixlen; - na->scope = original->scope; - na->cinfo = original->cinfo; - - if (original->label) { - na->label = strdup(original->label); - if (!na->label) - return -ENOMEM; - } - - na->broadcast = broadcast; - na->in_addr = in_addr; - - LIST_PREPEND(addresses, link->pool_addresses, na); - - *ret = na; - na = NULL; - - return 0; -} - -int address_configure(Address *address, Link *link, - sd_rtnl_message_handler_t callback) { - _cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL; - int r; - - assert(address); - assert(address->family == AF_INET || address->family == AF_INET6); - assert(link); - assert(link->ifindex > 0); - assert(link->manager); - assert(link->manager->rtnl); - - r = address_acquire(link, address, &address); - if (r < 0) - return r; - - r = sd_rtnl_message_new_addr(link->manager->rtnl, &req, RTM_NEWADDR, - link->ifindex, address->family); - if (r < 0) - return log_error_errno(r, "Could not allocate RTM_NEWADDR message: %m"); - - r = sd_rtnl_message_addr_set_prefixlen(req, address->prefixlen); - if (r < 0) - return log_error_errno(r, "Could not set prefixlen: %m"); - - address->flags |= IFA_F_PERMANENT; - - r = sd_rtnl_message_addr_set_flags(req, (address->flags & 0xff)); - if (r < 0) - return log_error_errno(r, "Could not set flags: %m"); - - if (address->flags & ~0xff) { - r = sd_rtnl_message_append_u32(req, IFA_FLAGS, address->flags); - if (r < 0) - return log_error_errno(r, "Could not set extended flags: %m"); - } - - r = sd_rtnl_message_addr_set_scope(req, address->scope); - if (r < 0) - return log_error_errno(r, "Could not set scope: %m"); - - if (address->family == AF_INET) - r = sd_rtnl_message_append_in_addr(req, IFA_LOCAL, &address->in_addr.in); - else if (address->family == AF_INET6) - r = sd_rtnl_message_append_in6_addr(req, IFA_LOCAL, &address->in_addr.in6); - if (r < 0) - return log_error_errno(r, "Could not append IFA_LOCAL attribute: %m"); - - if (!in_addr_is_null(address->family, &address->in_addr_peer)) { - if (address->family == AF_INET) - r = sd_rtnl_message_append_in_addr(req, IFA_ADDRESS, &address->in_addr_peer.in); - else if (address->family == AF_INET6) - r = sd_rtnl_message_append_in6_addr(req, IFA_ADDRESS, &address->in_addr_peer.in6); - if (r < 0) - return log_error_errno(r, "Could not append IFA_ADDRESS attribute: %m"); - } else { - if (address->family == AF_INET) { - r = sd_rtnl_message_append_in_addr(req, IFA_BROADCAST, &address->broadcast); - if (r < 0) - return log_error_errno(r, "Could not append IFA_BROADCAST attribute: %m"); - } - } - - if (address->label) { - r = sd_rtnl_message_append_string(req, IFA_LABEL, address->label); - if (r < 0) - return log_error_errno(r, "Could not append IFA_LABEL attribute: %m"); - } - - r = sd_rtnl_message_append_cache_info(req, IFA_CACHEINFO, - &address->cinfo); - if (r < 0) - return log_error_errno(r, "Could not append IFA_CACHEINFO attribute: %m"); - - r = sd_rtnl_call_async(link->manager->rtnl, req, callback, link, 0, NULL); - if (r < 0) - return log_error_errno(r, "Could not send rtnetlink message: %m"); - - link_ref(link); - - address_establish(address, link); - - return 0; -} - -int config_parse_broadcast( - const char *unit, - const char *filename, - unsigned line, - const char *section, - unsigned section_line, - const char *lvalue, - int ltype, - const char *rvalue, - void *data, - void *userdata) { - - Network *network = userdata; - _cleanup_address_free_ Address *n = NULL; - int r; - - assert(filename); - assert(section); - assert(lvalue); - assert(rvalue); - assert(data); - - r = address_new_static(network, section_line, &n); - if (r < 0) - return r; - - if (n->family == AF_INET6) { - log_syntax(unit, LOG_ERR, filename, line, EINVAL, - "Broadcast is not valid for IPv6 addresses, ignoring assignment: %s", rvalue); - return 0; - } - - r = in_addr_from_string(AF_INET, rvalue, (union in_addr_union*) &n->broadcast); - if (r < 0) { - log_syntax(unit, LOG_ERR, filename, line, EINVAL, - "Broadcast is invalid, ignoring assignment: %s", rvalue); - return 0; - } - - n->family = AF_INET; - n = NULL; - - return 0; -} - -int config_parse_address(const char *unit, - const char *filename, - unsigned line, - const char *section, - unsigned section_line, - const char *lvalue, - int ltype, - const char *rvalue, - void *data, - void *userdata) { - - Network *network = userdata; - _cleanup_address_free_ Address *n = NULL; - const char *address, *e; - union in_addr_union buffer; - int r, f; - - assert(filename); - assert(section); - assert(lvalue); - assert(rvalue); - assert(data); - - if (streq(section, "Network")) { - /* we are not in an Address section, so treat - * this as the special '0' section */ - section_line = 0; - } - - r = address_new_static(network, section_line, &n); - if (r < 0) - return r; - - /* Address=address/prefixlen */ - - /* prefixlen */ - e = strchr(rvalue, '/'); - if (e) { - unsigned i; - r = safe_atou(e + 1, &i); - if (r < 0) { - log_syntax(unit, LOG_ERR, filename, line, EINVAL, - "Prefix length is invalid, ignoring assignment: %s", e + 1); - return 0; - } - - n->prefixlen = (unsigned char) i; - - address = strndupa(rvalue, e - rvalue); - } else - address = rvalue; - - r = in_addr_from_string_auto(address, &f, &buffer); - if (r < 0) { - log_syntax(unit, LOG_ERR, filename, line, EINVAL, - "Address is invalid, ignoring assignment: %s", address); - return 0; - } - - if (!e && f == AF_INET) { - r = in_addr_default_prefixlen(&buffer.in, &n->prefixlen); - if (r < 0) { - log_syntax(unit, LOG_ERR, filename, line, EINVAL, - "Prefix length not specified, and a default one can not be deduced for '%s', ignoring assignment", address); - return 0; - } - } - - if (n->family != AF_UNSPEC && f != n->family) { - log_syntax(unit, LOG_ERR, filename, line, EINVAL, - "Address is incompatible, ignoring assignment: %s", address); - return 0; - } - - n->family = f; - - if (streq(lvalue, "Address")) - n->in_addr = buffer; - else - n->in_addr_peer = buffer; - - if (n->family == AF_INET && n->broadcast.s_addr == 0) - n->broadcast.s_addr = n->in_addr.in.s_addr | htonl(0xfffffffflu >> n->prefixlen); - - n = NULL; - - return 0; -} - -int config_parse_label(const char *unit, - const char *filename, - unsigned line, - const char *section, - unsigned section_line, - const char *lvalue, - int ltype, - const char *rvalue, - void *data, - void *userdata) { - Network *network = userdata; - _cleanup_address_free_ Address *n = NULL; - char *label; - int r; - - assert(filename); - assert(section); - assert(lvalue); - assert(rvalue); - assert(data); - - r = address_new_static(network, section_line, &n); - if (r < 0) - return r; - - label = strdup(rvalue); - if (!label) - return log_oom(); - - if (!ascii_is_valid(label) || strlen(label) >= IFNAMSIZ) { - log_syntax(unit, LOG_ERR, filename, line, EINVAL, - "Interface label is not ASCII clean or is too" - " long, ignoring assignment: %s", rvalue); - free(label); - return 0; - } - - free(n->label); - if (*label) - n->label = label; - else { - free(label); - n->label = NULL; - } - - n = NULL; - - return 0; -} - -bool address_equal(Address *a1, Address *a2) { - /* same object */ - if (a1 == a2) - return true; - - /* one, but not both, is NULL */ - if (!a1 || !a2) - return false; - - if (a1->family != a2->family) - return false; - - switch (a1->family) { - /* use the same notion of equality as the kernel does */ - case AF_UNSPEC: - return true; - - case AF_INET: - if (a1->prefixlen != a2->prefixlen) - return false; - else if (a1->prefixlen == 0) - /* make sure we don't try to shift by 32. - * See ISO/IEC 9899:TC3 ยง 6.5.7.3. */ - return true; - else { - uint32_t b1, b2; - - b1 = be32toh(a1->in_addr.in.s_addr); - b2 = be32toh(a2->in_addr.in.s_addr); - - return (b1 >> (32 - a1->prefixlen)) == (b2 >> (32 - a1->prefixlen)); - } - - case AF_INET6: { - uint64_t *b1, *b2; - - b1 = (uint64_t*)&a1->in_addr.in6; - b2 = (uint64_t*)&a2->in_addr.in6; - - return (((b1[0] ^ b2[0]) | (b1[1] ^ b2[1])) == 0UL); - } - - default: - assert_not_reached("Invalid address family"); - } -} |