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/***
This file is part of systemd.
Copyright 2014 Vinay Kulkarni <kulkarniv@vmware.com>
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 "hexdecoct.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"),
"DHCP\0",
config_item_perf_lookup, networkd_gperf_lookup,
false, m);
}
static const char* const duid_type_table[_DUID_TYPE_MAX] = {
[DUID_TYPE_RAW] = "raw",
[DUID_TYPE_LLT] = "link-layer-time",
[DUID_TYPE_EN] = "vendor",
[DUID_TYPE_LL] = "link-layer",
[DUID_TYPE_UUID] = "uuid"
};
DEFINE_PRIVATE_STRING_TABLE_LOOKUP_FROM_STRING(duid_type, DUIDType);
DEFINE_CONFIG_PARSE_ENUM(config_parse_duid_type, duid_type, DUIDType, "Failed to parse DUID type");
int config_parse_duid_rawdata(
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;
char *cbyte;
const char *pduid = rvalue;
Manager *m = userdata;
Network *n = userdata;
DUIDType duidtype;
uint16_t dhcp_duid_type = 0;
uint8_t dhcp_duid[MAX_DUID_LEN];
size_t len, count = 0, duid_start_offset = 0, dhcp_duid_len = 0;
assert(filename);
assert(lvalue);
assert(rvalue);
assert(userdata);
duidtype = (ltype == DUID_CONFIG_SOURCE_GLOBAL) ? m->duid_type : n->duid_type;
if (duidtype == _DUID_TYPE_INVALID)
duidtype = DUID_TYPE_RAW;
switch (duidtype) {
case DUID_TYPE_LLT:
/* RawData contains DUID-LLT link-layer address (offset 6) */
duid_start_offset = 6;
break;
case DUID_TYPE_EN:
/* RawData contains DUID-EN identifier (offset 4) */
duid_start_offset = 4;
break;
case DUID_TYPE_LL:
/* RawData contains DUID-LL link-layer address (offset 2) */
duid_start_offset = 2;
break;
case DUID_TYPE_UUID:
/* RawData specifies UUID (offset 0) - fall thru */
case DUID_TYPE_RAW:
/* First two bytes of RawData is DUID Type - fall thru */
default:
break;
}
if (duidtype != DUID_TYPE_RAW)
dhcp_duid_type = (uint16_t) duidtype;
/* RawData contains DUID in format " NN:NN:NN... " */
for (;;) {
int n1, n2;
uint32_t byte;
r = extract_first_word(&pduid, &cbyte, ":", 0);
if (r < 0) {
log_syntax(unit, LOG_ERR, filename, line, r, "Failed to read DUID, ignoring assignment: %s.", rvalue);
return 0;
}
if (r == 0)
break;
if (duid_start_offset + dhcp_duid_len >= MAX_DUID_LEN) {
log_syntax(unit, LOG_ERR, filename, line, 0, "Max DUID length exceeded, ignoring assignment: %s.", rvalue);
return 0;
}
len = strlen(cbyte);
if (len != 1 && len != 2) {
log_syntax(unit, LOG_ERR, filename, line, 0, "Invalid length - DUID byte: %s, ignoring assignment: %s.", cbyte, rvalue);
return 0;
}
n1 = unhexchar(cbyte[0]);
if (len == 2)
n2 = unhexchar(cbyte[1]);
else
n2 = 0;
if (n1 < 0 || n2 < 0) {
log_syntax(unit, LOG_ERR, filename, line, 0, "Invalid DUID byte: %s. Ignoring assignment: %s.", cbyte, rvalue);
return 0;
}
byte = ((uint8_t) n1 << (4 * (len-1))) | (uint8_t) n2;
/* If DUID_TYPE_RAW, first two bytes hold DHCP DUID type code */
if (duidtype == DUID_TYPE_RAW && count < 2) {
dhcp_duid_type |= (byte << (8 * (1 - count)));
count++;
continue;
}
dhcp_duid[duid_start_offset + dhcp_duid_len] = byte;
dhcp_duid_len++;
}
if (ltype == DUID_CONFIG_SOURCE_GLOBAL) {
m->duid_type = duidtype;
m->dhcp_duid_type = dhcp_duid_type;
m->dhcp_duid_len = dhcp_duid_len;
memcpy(&m->dhcp_duid[duid_start_offset], dhcp_duid, dhcp_duid_len);
} else {
/* DUID_CONFIG_SOURCE_NETWORK */
n->duid_type = duidtype;
n->dhcp_duid_type = dhcp_duid_type;
n->dhcp_duid_len = dhcp_duid_len;
memcpy(&n->dhcp_duid[duid_start_offset], dhcp_duid, dhcp_duid_len);
}
return 0;
}
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