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Merge pull request #14055 from yuwata/network-send-option-takes-type-field

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network: make SendOption= also take type field
This commit is contained in:
Zbigniew Jędrzejewski-Szmek 2019-11-17 19:17:38 +01:00 committed by GitHub
parent bf9012bbf6 586ec936c6
commit a2870138c1
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GPG key ID: 4AEE18F83AFDEB23
7 changed files with 125 additions and 46 deletions
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14
man/systemd.network.xml
View file

@ -1642,13 +1642,15 @@
<varlistentry>
<term><varname>SendOption=</varname></term>
<listitem>
<para>Send an arbitrary option in the DHCPv4 request. Takes a DHCP option number and an arbitrary
data string separated with a colon
(<literal><replaceable>option</replaceable>:<replaceable>value</replaceable></literal>). The
option number must be an interger in the range 1..254. Special characters in the data string may
be escaped using
<para>Send an arbitrary option in the DHCPv4 request. Takes a DHCP option number, data type
and data separated with a colon (<literal><replaceable>option</replaceable>:
<replaceable>type</replaceable>:<replaceable>value</replaceable></literal>). The option
number must be an interger in the range 1..254. The type takes one of
<literal>uint8</literal>, <literal>uint16</literal>, <literal>uint32</literal>,
<literal>ipv4address</literal>, or <literal>string</literal>.
Special characters in the data string may be escaped using
<ulink url="https://en.wikipedia.org/wiki/Escape_sequences_in_C#Table_of_escape_sequences">C-style
escapes</ulink>. This option can be specified multiple times. If an empty string is specified,
escapes</ulink>. This option can be specified multiple times. If an empty string is specified,
then all options specified earlier are cleared. Defaults to unset.</para>
</listitem>
</varlistentry>

10
src/network/networkd-dhcp-common.c
View file

@ -273,3 +273,13 @@ static const char* const dhcp_use_domains_table[_DHCP_USE_DOMAINS_MAX] = {
};
DEFINE_STRING_TABLE_LOOKUP_WITH_BOOLEAN(dhcp_use_domains, DHCPUseDomains, DHCP_USE_DOMAINS_YES);
static const char * const dhcp_option_data_type_table[_DHCP_OPTION_DATA_MAX] = {
[DHCP_OPTION_DATA_UINT8] = "uint8",
[DHCP_OPTION_DATA_UINT16] = "uint16",
[DHCP_OPTION_DATA_UINT32] = "uint32",
[DHCP_OPTION_DATA_STRING] = "string",
[DHCP_OPTION_DATA_IPV4ADDRESS] = "ipv4address",
};
DEFINE_STRING_TABLE_LOOKUP(dhcp_option_data_type, DHCPOptionDataType);

13
src/network/networkd-dhcp-common.h
View file

@ -15,6 +15,16 @@ typedef enum DHCPUseDomains {
_DHCP_USE_DOMAINS_INVALID = -1,
} DHCPUseDomains;
typedef enum DHCPOptionDataType {
DHCP_OPTION_DATA_UINT8,
DHCP_OPTION_DATA_UINT16,
DHCP_OPTION_DATA_UINT32,
DHCP_OPTION_DATA_STRING,
DHCP_OPTION_DATA_IPV4ADDRESS,
_DHCP_OPTION_DATA_MAX,
_DHCP_OPTION_DATA_INVALID,
} DHCPOptionDataType;
typedef struct DUID {
/* Value of Type in [DHCP] section */
DUIDType type;
@ -27,6 +37,9 @@ typedef struct DUID {
const char* dhcp_use_domains_to_string(DHCPUseDomains p) _const_;
DHCPUseDomains dhcp_use_domains_from_string(const char *s) _pure_;
const char *dhcp_option_data_type_to_string(DHCPOptionDataType d) _const_;
DHCPOptionDataType dhcp_option_data_type_from_string(const char *d) _pure_;
CONFIG_PARSER_PROTOTYPE(config_parse_dhcp);
CONFIG_PARSER_PROTOTYPE(config_parse_dhcp_use_dns);
CONFIG_PARSER_PROTOTYPE(config_parse_dhcp_use_domains);

29
src/network/networkd-dhcp-server.c
View file

@ -480,16 +480,6 @@ int config_parse_dhcp_server_sip(
}
}
static const char * const dhcp_raw_option_data_type_table[_DHCP_RAW_OPTION_DATA_MAX] = {
[DHCP_RAW_OPTION_DATA_UINT8] = "uint8",
[DHCP_RAW_OPTION_DATA_UINT16] = "uint16",
[DHCP_RAW_OPTION_DATA_UINT32] = "uint32",
[DHCP_RAW_OPTION_DATA_STRING] = "string",
[DHCP_RAW_OPTION_DATA_IPV4ADDRESS] = "ipv4address",
};
DEFINE_STRING_TABLE_LOOKUP(dhcp_raw_option_data_type, DHCPRawOption);
int config_parse_dhcp_server_raw_option_data(
const char *unit,
const char *filename,
@ -505,11 +495,11 @@ int config_parse_dhcp_server_raw_option_data(
_cleanup_(sd_dhcp_raw_option_unrefp) sd_dhcp_raw_option *opt = NULL, *old = NULL;
_cleanup_free_ char *word = NULL, *q = NULL;
union in_addr_union addr;
DHCPOptionDataType type;
Network *network = data;
uint16_t uint16_data;
uint32_t uint32_data;
uint8_t uint8_data;
DHCPRawOption type;
const char *p;
void *udata;
ssize_t sz;
@ -559,16 +549,15 @@ int config_parse_dhcp_server_raw_option_data(
return 0;
}
r = dhcp_raw_option_data_type_from_string(word);
if (r < 0) {
log_syntax(unit, LOG_ERR, filename, line, r,
type = dhcp_option_data_type_from_string(word);
if (type < 0) {
log_syntax(unit, LOG_ERR, filename, line, 0,
"Invalid DHCP server send data type, ignoring assignment: %s", p);
return 0;
}
type = r;
switch(type) {
case DHCP_RAW_OPTION_DATA_UINT8:{
case DHCP_OPTION_DATA_UINT8:{
r = safe_atou8(p, &uint8_data);
if (r < 0) {
log_syntax(unit, LOG_ERR, filename, line, r,
@ -580,7 +569,7 @@ int config_parse_dhcp_server_raw_option_data(
sz = sizeof(uint8_t);
break;
}
case DHCP_RAW_OPTION_DATA_UINT16:{
case DHCP_OPTION_DATA_UINT16:{
r = safe_atou16(p, &uint16_data);
if (r < 0) {
log_syntax(unit, LOG_ERR, filename, line, r,
@ -592,7 +581,7 @@ int config_parse_dhcp_server_raw_option_data(
sz = sizeof(uint16_t);
break;
}
case DHCP_RAW_OPTION_DATA_UINT32: {
case DHCP_OPTION_DATA_UINT32: {
r = safe_atou32(p, &uint32_data);
if (r < 0) {
log_syntax(unit, LOG_ERR, filename, line, r,
@ -605,7 +594,7 @@ int config_parse_dhcp_server_raw_option_data(
break;
}
case DHCP_RAW_OPTION_DATA_IPV4ADDRESS: {
case DHCP_OPTION_DATA_IPV4ADDRESS: {
r = in_addr_from_string(AF_INET, p, &addr);
if (r < 0) {
log_syntax(unit, LOG_ERR, filename, line, r,
@ -617,7 +606,7 @@ int config_parse_dhcp_server_raw_option_data(
sz = sizeof(addr.in.s_addr);
break;
}
case DHCP_RAW_OPTION_DATA_STRING:
case DHCP_OPTION_DATA_STRING:
sz = cunescape(p, 0, &q);
if (sz < 0) {
log_syntax(unit, LOG_ERR, filename, line, sz,

13
src/network/networkd-dhcp-server.h
View file

@ -7,19 +7,6 @@
typedef struct Link Link;
typedef enum DHCPRawOption {
DHCP_RAW_OPTION_DATA_UINT8,
DHCP_RAW_OPTION_DATA_UINT16,
DHCP_RAW_OPTION_DATA_UINT32,
DHCP_RAW_OPTION_DATA_STRING,
DHCP_RAW_OPTION_DATA_IPV4ADDRESS,
_DHCP_RAW_OPTION_DATA_MAX,
_DHCP_RAW_OPTION_DATA_INVALID,
} DHCPRawOption;
const char *dhcp_raw_option_data_type_to_string(DHCPRawOption d) _const_;
DHCPRawOption dhcp_raw_option_data_type_from_string(const char *d) _pure_;
int dhcp4_server_configure(Link *link);
CONFIG_PARSER_PROTOTYPE(config_parse_dhcp_server_dns);

90
src/network/networkd-dhcp4.c
View file

@ -1580,9 +1580,14 @@ int config_parse_dhcp_send_option(
_cleanup_(sd_dhcp_option_unrefp) sd_dhcp_option *opt = NULL, *old = NULL;
_cleanup_free_ char *word = NULL, *q = NULL;
union in_addr_union addr;
DHCPOptionDataType type;
Network *network = data;
uint8_t u, uint8_data;
uint16_t uint16_data;
uint32_t uint32_data;
const char *p;
uint8_t u;
void *udata;
ssize_t sz;
int r;
@ -1618,14 +1623,87 @@ int config_parse_dhcp_send_option(
return 0;
}
sz = cunescape(p, 0, &q);
if (sz < 0) {
log_syntax(unit, LOG_ERR, filename, line, sz,
"Failed to decode option data, ignoring assignment: %s", p);
free(word);
r = extract_first_word(&p, &word, ":", 0);
if (r == -ENOMEM)
return log_oom();
if (r <= 0) {
log_syntax(unit, LOG_ERR, filename, line, r,
"Invalid DHCP send option, ignoring assignment: %s", rvalue);
return 0;
}
r = sd_dhcp_option_new(u, q, sz, &opt);
type = dhcp_option_data_type_from_string(word);
if (type < 0) {
log_syntax(unit, LOG_ERR, filename, line, 0,
"Invalid DHCP send data type, ignoring assignment: %s", p);
return 0;
}
switch(type) {
case DHCP_OPTION_DATA_UINT8:{
r = safe_atou8(p, &uint8_data);
if (r < 0) {
log_syntax(unit, LOG_ERR, filename, line, r,
"Failed to parse DHCPv4 uint8 data, ignoring assignment: %s", p);
return 0;
}
udata = &uint8_data;
sz = sizeof(uint8_t);
break;
}
case DHCP_OPTION_DATA_UINT16:{
r = safe_atou16(p, &uint16_data);
if (r < 0) {
log_syntax(unit, LOG_ERR, filename, line, r,
"Failed to parse DHCPv4 uint16 data, ignoring assignment: %s", p);
return 0;
}
udata = &uint16_data;
sz = sizeof(uint16_t);
break;
}
case DHCP_OPTION_DATA_UINT32: {
r = safe_atou32(p, &uint32_data);
if (r < 0) {
log_syntax(unit, LOG_ERR, filename, line, r,
"Failed to parse DHCPv4 uint32 data, ignoring assignment: %s", p);
return 0;
}
udata = &uint32_data;
sz = sizeof(uint32_t);
break;
}
case DHCP_OPTION_DATA_IPV4ADDRESS: {
r = in_addr_from_string(AF_INET, p, &addr);
if (r < 0) {
log_syntax(unit, LOG_ERR, filename, line, r,
"Failed to parse DHCPv4 ipv4address data, ignoring assignment: %s", p);
return 0;
}
udata = &addr.in;
sz = sizeof(addr.in.s_addr);
break;
}
case DHCP_OPTION_DATA_STRING:
sz = cunescape(p, 0, &q);
if (sz < 0) {
log_syntax(unit, LOG_ERR, filename, line, sz,
"Failed to decode option data, ignoring assignment: %s", p);
}
udata = q;
break;
default:
return -EINVAL;
}
r = sd_dhcp_option_new(u, udata, sz, &opt);
if (r < 0) {
log_syntax(unit, LOG_ERR, filename, line, r,
"Failed to store DHCP send option '%s', ignoring assignment: %m", rvalue);

2
src/network/networkd-network-gperf.gperf
View file

@ -175,7 +175,7 @@ DHCPv4.ListenPort, config_parse_uint16,
DHCPv4.SendRelease, config_parse_bool, 0, offsetof(Network, dhcp_send_release)
DHCPv4.BlackList, config_parse_dhcp_black_listed_ip_address, 0, 0
DHCPv4.IPServiceType, config_parse_ip_service_type, 0, offsetof(Network, ip_service_type)
DHCPv4.SendOption, config_parse_dhcp_send_option, 0, 0
DHCPv4.SendOption, config_parse_dhcp_send_option, 0, 0
DHCPv6.UseDNS, config_parse_bool, 0, offsetof(Network, dhcp6_use_dns)
DHCPv6.UseNTP, config_parse_bool, 0, offsetof(Network, dhcp6_use_ntp)
DHCPv6.RapidCommit, config_parse_bool, 0, offsetof(Network, rapid_commit)