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authorTom Gundersen <teg@jklm.no>2016-03-10 14:38:42 +0100
committerTom Gundersen <teg@jklm.no>2016-03-10 14:38:42 +0100
commitead02a14ede96738250c3aac83adf9ecc1b7e2f1 (patch)
tree2c5a91b5102fe014299ef15f86f30ee3569fe260 /src/network/networkd-conf.c
parent79c96fd20457f208c752506030295b4cf64a2994 (diff)
parentc83321e6d40b294e73e2881e4a98172c4244323b (diff)
Merge pull request #2818 from vinaykul/master
DHCP DUID and IAID configurability
Diffstat (limited to 'src/network/networkd-conf.c')
-rw-r--r--src/network/networkd-conf.c133
1 files changed, 133 insertions, 0 deletions
diff --git a/src/network/networkd-conf.c b/src/network/networkd-conf.c
new file mode 100644
index 0000000000..4bc92b8171
--- /dev/null
+++ b/src/network/networkd-conf.c
@@ -0,0 +1,133 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+ This file is part of systemd.
+
+ Copyright 2014 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 <ctype.h>
+
+#include "conf-parser.h"
+#include "def.h"
+#include "dhcp-identifier.h"
+#include "networkd-conf.h"
+#include "string-table.h"
+
+int manager_parse_config_file(Manager *m) {
+ assert(m);
+
+ return config_parse_many(PKGSYSCONFDIR "/networkd.conf",
+ CONF_PATHS_NULSTR("systemd/networkd.conf.d"),
+ "DUID\0",
+ config_item_perf_lookup, networkd_gperf_lookup,
+ false, m);
+}
+
+static const char* const dhcp_duid_type_table[_DHCP_DUID_TYPE_MAX] = {
+ [DHCP_DUID_TYPE_RAW] = "raw",
+ [DHCP_DUID_TYPE_LLT] = "link-layer-time",
+ [DHCP_DUID_TYPE_EN] = "vendor",
+ [DHCP_DUID_TYPE_LL] = "link-layer",
+ [DHCP_DUID_TYPE_UUID] = "uuid"
+};
+DEFINE_PRIVATE_STRING_TABLE_LOOKUP_FROM_STRING(dhcp_duid_type, DHCPDUIDType);
+DEFINE_CONFIG_PARSE_ENUM(config_parse_dhcp_duid_type, dhcp_duid_type, DHCPDUIDType, "Failed to parse DHCP DUID type");
+
+int config_parse_dhcp_duid_raw(
+ 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) {
+ int r;
+ long byte;
+ char *cbyte, *pnext;
+ const char *pduid = (const char *)rvalue;
+ size_t count = 0, duid_len = 0;
+ Manager *m = userdata;
+
+ assert(filename);
+ assert(lvalue);
+ assert(rvalue);
+ assert(m);
+ assert(m->dhcp_duid_type != _DHCP_DUID_TYPE_INVALID);
+
+ switch (m->dhcp_duid_type) {
+ case DHCP_DUID_TYPE_LLT:
+ /* RawData contains DUID-LLT link-layer address (offset 6) */
+ duid_len = 6;
+ break;
+ case DHCP_DUID_TYPE_EN:
+ /* RawData contains DUID-EN identifier (offset 4) */
+ duid_len = 4;
+ break;
+ case DHCP_DUID_TYPE_LL:
+ /* RawData contains DUID-LL link-layer address (offset 2) */
+ duid_len = 2;
+ break;
+ case DHCP_DUID_TYPE_UUID:
+ /* RawData specifies UUID (offset 0) - fall thru */
+ case DHCP_DUID_TYPE_RAW:
+ /* First two bytes of RawData is DUID Type - fall thru */
+ default:
+ break;
+ }
+
+ if (m->dhcp_duid_type != DHCP_DUID_TYPE_RAW)
+ m->dhcp_duid.type = htobe16(m->dhcp_duid_type);
+
+ /* RawData contains DUID in format " NN:NN:NN... " */
+ while (true) {
+ r = extract_first_word(&pduid, &cbyte, ":", 0);
+ if (r < 0) {
+ log_error("Failed to read DUID.");
+ return -EINVAL;
+ }
+ if (r == 0)
+ break;
+ if (duid_len >= MAX_DUID_LEN) {
+ log_error("DUID length exceeds maximum length.");
+ return -EINVAL;
+ }
+
+ errno = 0;
+ byte = strtol(cbyte, &pnext, 16);
+ if ((errno == ERANGE && (byte == LONG_MAX || byte == LONG_MIN))
+ || (errno != 0 && byte == 0) || (cbyte == pnext)) {
+ log_error("Invalid DUID byte: %s.", cbyte);
+ return -EINVAL;
+ }
+
+ /* If DHCP_DUID_TYPE_RAW, first two bytes holds DUID Type */
+ if ((m->dhcp_duid_type == DHCP_DUID_TYPE_RAW) && (count < 2)) {
+ m->dhcp_duid.type |= (byte << (8 * count));
+ count++;
+ continue;
+ }
+
+ m->dhcp_duid.raw.data[duid_len++] = byte;
+ }
+
+ m->dhcp_duid_len = sizeof(m->dhcp_duid.type) + duid_len;
+
+ return 0;
+}