diff options
Diffstat (limited to 'src/libsystemd-network/dhcp-identifier.c')
-rw-r--r-- | src/libsystemd-network/dhcp-identifier.c | 129 |
1 files changed, 0 insertions, 129 deletions
diff --git a/src/libsystemd-network/dhcp-identifier.c b/src/libsystemd-network/dhcp-identifier.c deleted file mode 100644 index a21efc4d06..0000000000 --- a/src/libsystemd-network/dhcp-identifier.c +++ /dev/null @@ -1,129 +0,0 @@ -/*** - This file is part of systemd. - - Copyright (C) 2015 Tom Gundersen <teg@jklmen> - - 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 "libudev.h" -#include "sd-id128.h" - -#include "dhcp-identifier.h" -#include "dhcp6-protocol.h" -#include "network-internal.h" -#include "siphash24.h" -#include "sparse-endian.h" -#include "udev-util.h" -#include "virt.h" - -#define SYSTEMD_PEN 43793 -#define HASH_KEY SD_ID128_MAKE(80,11,8c,c2,fe,4a,03,ee,3e,d6,0c,6f,36,39,14,09) - -int dhcp_validate_duid_len(uint16_t duid_type, size_t duid_len) { - struct duid d; - - assert_cc(sizeof(d.raw) >= MAX_DUID_LEN); - if (duid_len > MAX_DUID_LEN) - return -EINVAL; - - switch (duid_type) { - case DUID_TYPE_LLT: - if (duid_len <= sizeof(d.llt)) - return -EINVAL; - break; - case DUID_TYPE_EN: - if (duid_len != sizeof(d.en)) - return -EINVAL; - break; - case DUID_TYPE_LL: - if (duid_len <= sizeof(d.ll)) - return -EINVAL; - break; - case DUID_TYPE_UUID: - if (duid_len != sizeof(d.uuid)) - return -EINVAL; - break; - default: - /* accept unknown type in order to be forward compatible */ - break; - } - return 0; -} - -int dhcp_identifier_set_duid_en(struct duid *duid, size_t *len) { - sd_id128_t machine_id; - uint64_t hash; - int r; - - assert(duid); - assert(len); - - r = sd_id128_get_machine(&machine_id); - if (r < 0) - return r; - - unaligned_write_be16(&duid->type, DUID_TYPE_EN); - unaligned_write_be32(&duid->en.pen, SYSTEMD_PEN); - - *len = sizeof(duid->type) + sizeof(duid->en); - - /* a bit of snake-oil perhaps, but no need to expose the machine-id - directly; duid->en.id might not be aligned, so we need to copy */ - hash = htole64(siphash24(&machine_id, sizeof(machine_id), HASH_KEY.bytes)); - memcpy(duid->en.id, &hash, sizeof(duid->en.id)); - - return 0; -} - -int dhcp_identifier_set_iaid(int ifindex, uint8_t *mac, size_t mac_len, void *_id) { - /* name is a pointer to memory in the udev_device struct, so must - have the same scope */ - _cleanup_udev_device_unref_ struct udev_device *device = NULL; - const char *name = NULL; - uint64_t id; - - if (detect_container() <= 0) { - /* not in a container, udev will be around */ - _cleanup_udev_unref_ struct udev *udev; - char ifindex_str[2 + DECIMAL_STR_MAX(int)]; - - udev = udev_new(); - if (!udev) - return -ENOMEM; - - sprintf(ifindex_str, "n%d", ifindex); - device = udev_device_new_from_device_id(udev, ifindex_str); - if (device) { - if (udev_device_get_is_initialized(device) <= 0) - /* not yet ready */ - return -EBUSY; - - name = net_get_name(device); - } - } - - if (name) - id = siphash24(name, strlen(name), HASH_KEY.bytes); - else - /* fall back to MAC address if no predictable name available */ - id = siphash24(mac, mac_len, HASH_KEY.bytes); - - id = htole64(id); - - /* fold into 32 bits */ - unaligned_write_be32(_id, (id & 0xffffffff) ^ (id >> 32)); - - return 0; -} |