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networkd: rework duid_{type,duid_type,duid,duid_len} setting

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Separate fields are replaced  with a struct.

Second second duid type field is removed. The first field was used to carry
the result of DUIDType= configuration, and the second was either a copy of
this, or contained the type extracted from DuidRawData. The semantics are changed
so that the type specified in DUIDType is always used. DUIDRawData= no longer
overrides the type setting.

The networkd code is now more constrained than the sd-dhcp code:
DUIDRawData cannot have 0 length, length 0 is treated the same as unsetting.
Likewise, it is not possible to set a DUIDType=0. If it ever becomes necessary
to set type=0 or a zero-length duid, the code can be changed to support that.
Nevertheless, I think that's unlikely.

This addresses #3127 § 1 and 3.

v2:
- rename DUID.duid, DUID.duid_len to DUID.raw_data, DUID.raw_data_len
This commit is contained in:
Zbigniew Jędrzejewski-Szmek 2016-04-28 23:23:45 -04:00
parent d7df2fd317
commit 8341a5c381
11 changed files with 88 additions and 144 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

87
src/network/networkd-conf.c
View File

@ -41,7 +41,7 @@ static const char* const duid_type_table[_DUID_TYPE_MAX] = {
[DUID_TYPE_LLT] = "link-layer-time",
[DUID_TYPE_EN] = "vendor",
[DUID_TYPE_LL] = "link-layer",
[DUID_TYPE_UUID] = "uuid"
[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");
@ -58,69 +58,29 @@ int config_parse_duid_rawdata(
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;
DUID *ret = data;
uint8_t raw_data[MAX_DUID_LEN];
unsigned count = 0;
assert(filename);
assert(lvalue);
assert(rvalue);
assert(userdata);
assert(ret);
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... " */
/* RawData contains DUID in format "NN:NN:NN..." */
for (;;) {
int n1, n2;
int n1, n2, len, r;
uint32_t byte;
char *cbyte;
r = extract_first_word(&pduid, &cbyte, ":", 0);
r = extract_first_word(&rvalue, &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) {
if (count >= MAX_DUID_LEN) {
log_syntax(unit, LOG_ERR, filename, line, 0, "Max DUID length exceeded, ignoring assignment: %s.", rvalue);
return 0;
}
@ -142,30 +102,11 @@ int config_parse_duid_rawdata(
}
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);
raw_data[count++] = byte;
}
assert_cc(sizeof(raw_data) == sizeof(ret->raw_data));
memcpy(ret->raw_data, raw_data, count);
ret->raw_data_len = count;
return 0;
}

29
src/network/networkd-conf.h
View File

@ -21,14 +21,29 @@
#include "networkd.h"
typedef enum DuidConfigSource {
DUID_CONFIG_SOURCE_GLOBAL = 0,
DUID_CONFIG_SOURCE_NETWORK,
} DuidConfigSource;
int manager_parse_config_file(Manager *m);
const struct ConfigPerfItem* networkd_gperf_lookup(const char *key, unsigned length);
int config_parse_duid_type(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 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 config_parse_duid_type(
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 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);

24
src/network/networkd-dhcp4.c
View File

@ -628,28 +628,24 @@ int dhcp4_configure(Link *link) {
}
switch (link->network->dhcp_client_identifier) {
case DHCP_CLIENT_ID_DUID:
case DHCP_CLIENT_ID_DUID: {
/* If configured, apply user specified DUID and/or IAID */
if (link->network->duid_type != _DUID_TYPE_INVALID)
r = sd_dhcp_client_set_iaid_duid(link->dhcp_client,
link->network->iaid,
link->network->dhcp_duid_type,
link->network->dhcp_duid,
link->network->dhcp_duid_len);
else
r = sd_dhcp_client_set_iaid_duid(link->dhcp_client,
link->network->iaid,
link->manager->dhcp_duid_type,
link->manager->dhcp_duid,
link->manager->dhcp_duid_len);
const DUID *duid = link_duid(link);
r = sd_dhcp_client_set_iaid_duid(link->dhcp_client,
link->network->iaid,
duid->type,
duid->raw_data_len > 0 ? duid->raw_data : NULL,
duid->raw_data_len);
if (r < 0)
return r;
break;
}
case DHCP_CLIENT_ID_MAC:
r = sd_dhcp_client_set_client_id(link->dhcp_client,
ARPHRD_ETHER,
(const uint8_t *) &link->mac,
sizeof (link->mac));
sizeof(link->mac));
if (r < 0)
return r;
break;

16
src/network/networkd-dhcp6.c
View File

@ -206,6 +206,7 @@ int dhcp6_request_address(Link *link) {
int dhcp6_configure(Link *link) {
sd_dhcp6_client *client = NULL;
int r;
const DUID *duid;
assert(link);
@ -234,16 +235,11 @@ int dhcp6_configure(Link *link) {
if (r < 0)
goto error;
if (link->network->duid_type != _DUID_TYPE_INVALID)
r = sd_dhcp6_client_set_duid(client,
link->network->dhcp_duid_type,
link->network->dhcp_duid,
link->network->dhcp_duid_len);
else
r = sd_dhcp6_client_set_duid(client,
link->manager->dhcp_duid_type,
link->manager->dhcp_duid,
link->manager->dhcp_duid_len);
duid = link_duid(link);
r = sd_dhcp6_client_set_duid(client,
duid->type,
duid->raw_data_len > 0 ? duid->raw_data : NULL,
duid->raw_data_len);
if (r < 0)
goto error;

4
src/network/networkd-gperf.gperf
View File

@ -14,5 +14,5 @@ struct ConfigPerfItem;
%struct-type
%includes
%%
DHCP.DUIDType, config_parse_duid_type, 0, offsetof(Manager, duid_type)
DHCP.DUIDRawData, config_parse_duid_rawdata, DUID_CONFIG_SOURCE_GLOBAL, offsetof(Manager, dhcp_duid)
DHCP.DUIDType, config_parse_duid_type, 0, offsetof(Manager, duid.type)
DHCP.DUIDRawData, config_parse_duid_rawdata, 0, offsetof(Manager, duid)

35
src/network/networkd-link.c
View File

@ -2879,6 +2879,8 @@ int link_update(Link *link, sd_netlink_message *m) {
}
if (link->dhcp_client) {
const DUID *duid = link_duid(link);
r = sd_dhcp_client_set_mac(link->dhcp_client,
(const uint8_t *) &link->mac,
sizeof (link->mac),
@ -2886,23 +2888,18 @@ int link_update(Link *link, sd_netlink_message *m) {
if (r < 0)
return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
if (link->network->duid_type != _DUID_TYPE_INVALID)
r = sd_dhcp_client_set_iaid_duid(link->dhcp_client,
link->network->iaid,
link->network->dhcp_duid_type,
link->network->dhcp_duid,
link->network->dhcp_duid_len);
else
r = sd_dhcp_client_set_iaid_duid(link->dhcp_client,
link->network->iaid,
link->manager->dhcp_duid_type,
link->manager->dhcp_duid,
link->manager->dhcp_duid_len);
r = sd_dhcp_client_set_iaid_duid(link->dhcp_client,
link->network->iaid,
duid->type,
duid->raw_data_len > 0 ? duid->raw_data : NULL,
duid->raw_data_len);
if (r < 0)
return log_link_warning_errno(link, r, "Could not update DUID/IAID in DHCP client: %m");
}
if (link->dhcp6_client) {
const DUID* duid = link_duid(link);
r = sd_dhcp6_client_set_mac(link->dhcp6_client,
(const uint8_t *) &link->mac,
sizeof (link->mac),
@ -2915,16 +2912,10 @@ int link_update(Link *link, sd_netlink_message *m) {
if (r < 0)
return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
if (link->network->duid_type != _DUID_TYPE_INVALID)
r = sd_dhcp6_client_set_duid(link->dhcp6_client,
link->network->dhcp_duid_type,
link->network->dhcp_duid,
link->network->dhcp_duid_len);
else
r = sd_dhcp6_client_set_duid(link->dhcp6_client,
link->manager->dhcp_duid_type,
link->manager->dhcp_duid,
link->manager->dhcp_duid_len);
r = sd_dhcp6_client_set_duid(link->dhcp6_client,
duid->type,
duid->raw_data_len > 0 ? duid->raw_data : NULL,
duid->raw_data_len);
if (r < 0)
return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
}

2
src/network/networkd-manager.c
View File

@ -1037,7 +1037,7 @@ int manager_new(Manager **ret) {
if (r < 0)
return r;
m->duid_type = DUID_TYPE_EN;
m->duid.type = DUID_TYPE_EN;
*ret = m;
m = NULL;

4
src/network/networkd-network-gperf.gperf
View File

@ -83,8 +83,8 @@ DHCP.Hostname, config_parse_hostname,
DHCP.RequestBroadcast, config_parse_bool, 0, offsetof(Network, dhcp_broadcast)
DHCP.CriticalConnection, config_parse_bool, 0, offsetof(Network, dhcp_critical)
DHCP.VendorClassIdentifier, config_parse_string, 0, offsetof(Network, dhcp_vendor_class_identifier)
DHCP.DUIDType, config_parse_duid_type, 0, offsetof(Network, duid_type)
DHCP.DUIDRawData, config_parse_duid_rawdata, DUID_CONFIG_SOURCE_NETWORK, offsetof(Network, dhcp_duid)
DHCP.DUIDType, config_parse_duid_type, 0, offsetof(Network, duid.type)
DHCP.DUIDRawData, config_parse_duid_rawdata, 0, offsetof(Network, duid)
DHCP.RouteMetric, config_parse_unsigned, 0, offsetof(Network, dhcp_route_metric)
DHCP.UseTimezone, config_parse_bool, 0, offsetof(Network, dhcp_use_timezone)
DHCPServer.MaxLeaseTimeSec, config_parse_sec, 0, offsetof(Network, dhcp_server_max_lease_time_usec)

2
src/network/networkd-network.c
View File

@ -131,7 +131,7 @@ static int network_load_one(Manager *manager, const char *filename) {
network->ipv6_accept_ra = -1;
network->ipv6_dad_transmits = -1;
network->ipv6_hop_limit = -1;
network->duid_type = _DUID_TYPE_INVALID;
network->duid.type = _DUID_TYPE_INVALID;
network->proxy_arp = -1;
r = config_parse(NULL, filename, file,

15
src/network/networkd-network.h
View File

@ -68,6 +68,14 @@ typedef enum LLDPMode {
_LLDP_MODE_INVALID = -1,
} LLDPMode;
typedef struct DUID {
/* Value of Type in [DHCP] section */
DUIDType type;
uint8_t raw_data_len;
uint8_t raw_data[MAX_DUID_LEN];
} DUID;
typedef struct Manager Manager;
struct Network {
@ -150,12 +158,7 @@ struct Network {
struct ether_addr *mac;
unsigned mtu;
uint32_t iaid;
/* Value of Type in [DUID] section */
DUIDType duid_type;
/* DUID type code - RFC 3315 */
uint16_t dhcp_duid_type;
size_t dhcp_duid_len;
uint8_t dhcp_duid[MAX_DUID_LEN];
DUID duid;
LLDPMode lldp_mode; /* LLDP reception */
bool lldp_emit; /* LLDP transmission */

14
src/network/networkd.h
View File

@ -74,14 +74,16 @@ struct Manager {
usec_t network_dirs_ts_usec;
/* Value of Type in [DUID] section */
DUIDType duid_type;
/* DUID type code - RFC 3315 */
uint16_t dhcp_duid_type;
size_t dhcp_duid_len;
uint8_t dhcp_duid[MAX_DUID_LEN];
DUID duid;
};
static inline const DUID* link_duid(const Link *link) {
if (link->network->duid.type != _DUID_TYPE_INVALID)
return &link->network->duid;
else
return &link->manager->duid;
}
extern const sd_bus_vtable manager_vtable[];
int manager_new(Manager **ret);