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mirror of https://gitlab.isc.org/isc-projects/dhcp synced 2025-08-28 21:07:43 +00:00
isc-dhcp/server/stables.c
David Hankins 6368a1bd72 - Multiple (up to "delayed-ack x;" maximum) DHCPv4 packets are now queued and
released in bursts after single fsync() events when the upper limit is
  reached or if the receiving sockets go dry.  The practical upshot is
  that fsync-coupled server performance is now multiplicitively increased.
  The default delayed ack limit is 28.  Thanks entirely to a patch from
  Christof Chen.
2008-01-21 19:53:21 +00:00

428 lines
16 KiB
C

/* stables.c
Tables of information only used by server... */
/*
* Copyright (c) 2004-2007 by Internet Systems Consortium, Inc. ("ISC")
* Copyright (c) 1995-2003 by Internet Software Consortium
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
* OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
* Internet Systems Consortium, Inc.
* 950 Charter Street
* Redwood City, CA 94063
* <info@isc.org>
* http://www.isc.org/
*
* This software has been written for Internet Systems Consortium
* by Ted Lemon in cooperation with Vixie Enterprises and Nominum, Inc.
* To learn more about Internet Systems Consortium, see
* ``http://www.isc.org/''. To learn more about Vixie Enterprises,
* see ``http://www.vix.com''. To learn more about Nominum, Inc., see
* ``http://www.nominum.com''.
*/
#include "dhcpd.h"
#include <syslog.h>
#if defined (FAILOVER_PROTOCOL)
/* This is used to indicate some kind of failure when generating a
failover option. */
failover_option_t null_failover_option = { 0, 0 };
failover_option_t skip_failover_option = { 0, 0 };
/* Information about failover options, for printing, encoding
and decoding. */
struct failover_option_info ft_options [] =
{
{ 0, "unused", FT_UNDEF, 0, 0, 0 },
{ FTO_ADDRESSES_TRANSFERRED, "addresses-transferred", FT_UINT32, 1,
FM_OFFSET(addresses_transferred), FTB_ADDRESSES_TRANSFERRED },
{ FTO_ASSIGNED_IP_ADDRESS, "assigned-IP-address", FT_IPADDR, 1,
FM_OFFSET(assigned_addr), FTB_ASSIGNED_IP_ADDRESS },
{ FTO_BINDING_STATUS, "binding-status", FT_UINT8, 1,
FM_OFFSET(binding_status), FTB_BINDING_STATUS },
{ FTO_CLIENT_IDENTIFIER, "client-identifier", FT_BYTES, 0,
FM_OFFSET(client_identifier), FTB_CLIENT_IDENTIFIER },
{ FTO_CHADDR, "client-hardware-address", FT_BYTES, 0,
FM_OFFSET(chaddr), FTB_CHADDR },
{ FTO_CLTT, "client-last-transaction-time", FT_UINT32, 1,
FM_OFFSET(cltt), FTB_CLTT },
{ FTO_REPLY_OPTIONS, "client-reply-options", FT_BYTES, 0,
FM_OFFSET(reply_options), FTB_REPLY_OPTIONS },
{ FTO_REQUEST_OPTIONS, "client-request-options", FT_BYTES, 0,
FM_OFFSET(request_options), FTB_REQUEST_OPTIONS },
{ FTO_DDNS, "DDNS", FT_DDNS, 1, FM_OFFSET(ddns), FTB_DDNS },
{ FTO_DELAYED_SERVICE, "delayed-service", FT_UINT8, 1,
FM_OFFSET(delayed_service), FTB_DELAYED_SERVICE },
{ FTO_HBA, "hash-bucket-assignment", FT_BYTES, 0,
FM_OFFSET(hba), FTB_HBA },
{ FTO_IP_FLAGS, "IP-flags", FT_UINT16, 1,
FM_OFFSET(ip_flags), FTB_IP_FLAGS },
{ FTO_LEASE_EXPIRY, "lease-expiration-time", FT_UINT32, 1,
FM_OFFSET(expiry), FTB_LEASE_EXPIRY },
{ FTO_MAX_UNACKED, "max-unacked-bndupd", FT_UINT32, 1,
FM_OFFSET(max_unacked), FTB_MAX_UNACKED },
{ FTO_MCLT, "MCLT", FT_UINT32, 1, FM_OFFSET(mclt), FTB_MCLT },
{ FTO_MESSAGE, "message", FT_TEXT, 0,
FM_OFFSET(message), FTB_MESSAGE },
{ FTO_MESSAGE_DIGEST, "message-digest", FT_BYTES, 0,
FM_OFFSET(message_digest), FTB_MESSAGE_DIGEST },
{ FTO_POTENTIAL_EXPIRY, "potential-expiration-time", FT_UINT32, 1,
FM_OFFSET(potential_expiry), FTB_POTENTIAL_EXPIRY },
{ FTO_RECEIVE_TIMER, "receive-timer", FT_UINT32, 1,
FM_OFFSET(receive_timer), FTB_RECEIVE_TIMER },
{ FTO_PROTOCOL_VERSION, "protocol-version", FT_UINT8, 1,
FM_OFFSET(protocol_version), FTB_PROTOCOL_VERSION },
{ FTO_REJECT_REASON, "reject-reason", FT_UINT8, 1,
FM_OFFSET(reject_reason), FTB_REJECT_REASON },
{ FTO_RELATIONSHIP_NAME, "relationship-name", FT_BYTES, 0,
FM_OFFSET(relationship_name), FTB_RELATIONSHIP_NAME },
{ FTO_SERVER_FLAGS, "server-flags", FT_UINT8, 1,
FM_OFFSET(server_flags), FTB_SERVER_FLAGS },
{ FTO_SERVER_STATE, "server-state", FT_UINT8, 1,
FM_OFFSET(server_state), FTB_SERVER_STATE },
{ FTO_STOS, "start-time-of-state", FT_UINT32, 1,
FM_OFFSET(stos), FTB_STOS },
{ FTO_TLS_REPLY, "TLS-reply", FT_UINT8, 1,
FM_OFFSET(tls_reply), FTB_TLS_REPLY },
{ FTO_TLS_REQUEST, "TLS-request", FT_UINT8, 1,
FM_OFFSET(tls_request), FTB_TLS_REQUEST },
{ FTO_VENDOR_CLASS, "vendor-class-identifier", FT_BYTES, 0,
FM_OFFSET(vendor_class), FTB_VENDOR_CLASS },
{ FTO_VENDOR_OPTIONS, "vendor-specific-options", FT_BYTES, 0,
FM_OFFSET(vendor_options), FTB_VENDOR_OPTIONS }
};
/* These are really options that make sense for a particular request - if
some other option comes in, we're not going to use it, so we can just
discard it. Note that the message-digest option is allowed for all
message types, but is not saved - it's just used to validate the message
and then discarded - so it's not mentioned here. */
u_int32_t fto_allowed [] = {
0, /* 0 unused */
0, /* 1 POOLREQ */
FTB_ADDRESSES_TRANSFERRED, /* 2 POOLRESP */
(FTB_ASSIGNED_IP_ADDRESS | FTB_BINDING_STATUS | FTB_CLIENT_IDENTIFIER |
FTB_CHADDR | FTB_DDNS | FTB_IP_FLAGS | FTB_LEASE_EXPIRY |
FTB_POTENTIAL_EXPIRY | FTB_STOS | FTB_CLTT | FTB_REQUEST_OPTIONS |
FTB_REPLY_OPTIONS), /* 3 BNDUPD */
(FTB_ASSIGNED_IP_ADDRESS | FTB_BINDING_STATUS | FTB_CLIENT_IDENTIFIER |
FTB_CHADDR | FTB_DDNS | FTB_IP_FLAGS | FTB_LEASE_EXPIRY |
FTB_POTENTIAL_EXPIRY | FTB_STOS | FTB_CLTT | FTB_REQUEST_OPTIONS |
FTB_REPLY_OPTIONS | FTB_REJECT_REASON | FTB_MESSAGE), /* 4 BNDACK */
(FTB_RELATIONSHIP_NAME | FTB_MAX_UNACKED | FTB_RECEIVE_TIMER |
FTB_VENDOR_CLASS | FTB_PROTOCOL_VERSION | FTB_TLS_REQUEST |
FTB_MCLT | FTB_HBA), /* 5 CONNECT */
(FTB_RELATIONSHIP_NAME | FTB_MAX_UNACKED | FTB_RECEIVE_TIMER |
FTB_VENDOR_CLASS | FTB_PROTOCOL_VERSION | FTB_TLS_REPLY |
FTB_REJECT_REASON | FTB_MESSAGE), /* CONNECTACK */
0, /* 7 UPDREQALL */
0, /* 8 UPDDONE */
0, /* 9 UPDREQ */
(FTB_SERVER_STATE | FTB_SERVER_FLAGS | FTB_STOS), /* 10 STATE */
0, /* 11 CONTACT */
(FTB_REJECT_REASON | FTB_MESSAGE) /* 12 DISCONNECT */
};
/* Sizes of the various types. */
int ft_sizes [] = {
1, /* FT_UINT8 */
4, /* FT_IPADDR */
4, /* FT_UINT32 */
1, /* FT_BYTES */
1, /* FT_TEXT_OR_BYTES */
0, /* FT_DDNS */
0, /* FT_DDNS1 */
2, /* FT_UINT16 */
1, /* FT_TEXT */
0, /* FT_UNDEF */
0, /* FT_DIGEST */
};
/* Names of the various failover link states. */
const char *dhcp_flink_state_names [] = {
"invalid state 0",
"startup",
"message length wait",
"message wait",
"disconnected"
};
#endif /* FAILOVER_PROTOCOL */
/* Failover binding state names. These are used even if there is no
failover protocol support. */
const char *binding_state_names [] = {
"free", "active", "expired", "released", "abandoned",
"reset", "backup" };
struct universe agent_universe;
static struct option agent_options[] = {
{ "circuit-id", "X", &agent_universe, 1, 1 },
{ "remote-id", "X", &agent_universe, 2, 1 },
{ "agent-id", "I", &agent_universe, 3, 1 },
{ "DOCSIS-device-class", "L", &agent_universe, 4, 1 },
{ "link-selection", "I", &agent_universe, 5, 1 },
{ NULL, NULL, NULL, 0, 0 }
};
struct universe server_universe;
static struct option server_options[] = {
{ "default-lease-time", "T", &server_universe, 1, 1 },
{ "max-lease-time", "T", &server_universe, 2, 1 },
{ "min-lease-time", "T", &server_universe, 3, 1 },
{ "dynamic-bootp-lease-cutoff", "T", &server_universe, 4, 1 },
{ "dynamic-bootp-lease-length", "L", &server_universe, 5, 1 },
{ "boot-unknown-clients", "f", &server_universe, 6, 1 },
{ "dynamic-bootp", "f", &server_universe, 7, 1 },
{ "allow-bootp", "f", &server_universe, 8, 1 },
{ "allow-booting", "f", &server_universe, 9, 1 },
{ "one-lease-per-client", "f", &server_universe, 10, 1 },
{ "get-lease-hostnames", "f", &server_universe, 11, 1 },
{ "use-host-decl-names", "f", &server_universe, 12, 1 },
{ "use-lease-addr-for-default-route", "f",
&server_universe, 13, 1 },
{ "min-secs", "B", &server_universe, 14, 1 },
{ "filename", "t", &server_universe, 15, 1 },
{ "server-name", "t", &server_universe, 16, 1 },
{ "next-server", "I", &server_universe, 17, 1 },
{ "authoritative", "f", &server_universe, 18, 1 },
{ "vendor-option-space", "U", &server_universe, 19, 1 },
{ "always-reply-rfc1048", "f", &server_universe, 20, 1 },
{ "site-option-space", "X", &server_universe, 21, 1 },
{ "always-broadcast", "f", &server_universe, 22, 1 },
{ "ddns-domainname", "t", &server_universe, 23, 1 },
{ "ddns-hostname", "t", &server_universe, 24, 1 },
{ "ddns-rev-domainname", "t", &server_universe, 25, 1 },
{ "lease-file-name", "t", &server_universe, 26, 1 },
{ "pid-file-name", "t", &server_universe, 27, 1 },
{ "duplicates", "f", &server_universe, 28, 1 },
{ "declines", "f", &server_universe, 29, 1 },
{ "ddns-updates", "f", &server_universe, 30, 1 },
{ "omapi-port", "S", &server_universe, 31, 1 },
{ "local-port", "S", &server_universe, 32, 1 },
{ "limited-broadcast-address", "I", &server_universe, 33, 1 },
{ "remote-port", "S", &server_universe, 34, 1 },
{ "local-address", "I", &server_universe, 35, 1 },
{ "omapi-key", "d", &server_universe, 36, 1 },
{ "stash-agent-options", "f", &server_universe, 37, 1 },
{ "ddns-ttl", "T", &server_universe, 38, 1 },
{ "ddns-update-style", "Nddns-styles.", &server_universe, 39, 1 },
{ "client-updates", "f", &server_universe, 40, 1 },
{ "update-optimization", "f", &server_universe, 41, 1 },
{ "ping-check", "f", &server_universe, 42, 1 },
{ "update-static-leases", "f", &server_universe, 43, 1 },
{ "log-facility", "Nsyslog-facilities.",
&server_universe, 44, 1 },
{ "do-forward-updates", "f", &server_universe, 45, 1 },
{ "ping-timeout", "T", &server_universe, 46, 1 },
{ "infinite-is-reserved", "f", &server_universe, 47, 1 },
{ "update-conflict-detection", "f", &server_universe, 48, 1 },
{ "leasequery", "f", &server_universe, 49, 1 },
{ "adaptive-lease-time-threshold", "B", &server_universe, 50, 1 },
{ "do-reverse-updates", "f", &server_universe, 51, 1 },
{ "fqdn-reply", "f", &server_universe, 52, 1 },
{ "preferred-lifetime", "T", &server_universe, 53, 1 },
{ "dhcpv6-lease-file-name", "t", &server_universe, 54, 1 },
{ "dhcpv6-pid-file-name", "t", &server_universe, 55, 1 },
{ "limit-addrs-per-ia", "L", &server_universe, 56, 1 },
{ "delayed-ack", "S", &server_universe, 57, 1 },
{ NULL, NULL, NULL, 0, 0 }
};
struct enumeration_value ddns_styles_values [] = {
{ "none", 0 },
{ "ad-hoc", 1 },
{ "interim", 2 },
{ (char *)0, 0 }
};
struct enumeration ddns_styles = {
(struct enumeration *)0,
"ddns-styles", 1,
ddns_styles_values
};
struct enumeration_value syslog_values [] = {
#if defined (LOG_KERN)
{ "kern", LOG_KERN },
#endif
#if defined (LOG_USER)
{ "user", LOG_USER },
#endif
#if defined (LOG_MAIL)
{ "mail", LOG_MAIL },
#endif
#if defined (LOG_DAEMON)
{ "daemon", LOG_DAEMON },
#endif
#if defined (LOG_AUTH)
{ "auth", LOG_AUTH },
#endif
#if defined (LOG_SYSLOG)
{ "syslog", LOG_SYSLOG },
#endif
#if defined (LOG_LPR)
{ "lpr", LOG_LPR },
#endif
#if defined (LOG_NEWS)
{ "news", LOG_NEWS },
#endif
#if defined (LOG_UUCP)
{ "uucp", LOG_UUCP },
#endif
#if defined (LOG_CRON)
{ "cron", LOG_CRON },
#endif
#if defined (LOG_AUTHPRIV)
{ "authpriv", LOG_AUTHPRIV },
#endif
#if defined (LOG_FTP)
{ "ftp", LOG_FTP },
#endif
#if defined (LOG_LOCAL0)
{ "local0", LOG_LOCAL0 },
#endif
#if defined (LOG_LOCAL1)
{ "local1", LOG_LOCAL1 },
#endif
#if defined (LOG_LOCAL2)
{ "local2", LOG_LOCAL2 },
#endif
#if defined (LOG_LOCAL3)
{ "local3", LOG_LOCAL3 },
#endif
#if defined (LOG_LOCAL4)
{ "local4", LOG_LOCAL4 },
#endif
#if defined (LOG_LOCAL5)
{ "local5", LOG_LOCAL5 },
#endif
#if defined (LOG_LOCAL6)
{ "local6", LOG_LOCAL6 },
#endif
#if defined (LOG_LOCAL7)
{ "local7", LOG_LOCAL7 },
#endif
{ (char *)0, 0 }
};
struct enumeration syslog_enum = {
(struct enumeration *)0,
"syslog-facilities", 1,
syslog_values
};
void initialize_server_option_spaces()
{
int i;
unsigned code;
/* Set up the Relay Agent Information Option suboption space... */
agent_universe.name = "agent";
agent_universe.concat_duplicates = 0;
agent_universe.option_state_dereference =
linked_option_state_dereference;
agent_universe.lookup_func = lookup_linked_option;
agent_universe.save_func = save_linked_option;
agent_universe.delete_func = delete_linked_option;
agent_universe.encapsulate = linked_option_space_encapsulate;
agent_universe.foreach = linked_option_space_foreach;
agent_universe.decode = parse_option_buffer;
agent_universe.index = universe_count++;
agent_universe.length_size = 1;
agent_universe.tag_size = 1;
agent_universe.get_tag = getUChar;
agent_universe.store_tag = putUChar;
agent_universe.get_length = getUChar;
agent_universe.store_length = putUChar;
agent_universe.site_code_min = 0;
agent_universe.end = 0;
universes [agent_universe.index] = &agent_universe;
if (!option_name_new_hash(&agent_universe.name_hash,
AGENT_HASH_SIZE, MDL) ||
!option_code_new_hash(&agent_universe.code_hash,
AGENT_HASH_SIZE, MDL))
log_fatal ("Can't allocate agent option hash table.");
for (i = 0 ; agent_options[i].name ; i++) {
option_code_hash_add(agent_universe.code_hash,
&agent_options[i].code, 0,
&agent_options[i], MDL);
option_name_hash_add(agent_universe.name_hash,
agent_options[i].name, 0,
&agent_options[i], MDL);
}
#if defined(REPORT_HASH_PERFORMANCE)
log_info("Relay Agent name hash: %s",
option_name_hash_report(agent_universe.name_hash));
log_info("Relay Agent code hash: %s",
option_code_hash_report(agent_universe.code_hash));
#endif
code = DHO_DHCP_AGENT_OPTIONS;
option_code_hash_lookup(&agent_universe.enc_opt,
dhcp_universe.code_hash, &code, 0, MDL);
/* Set up the server option universe... */
server_universe.name = "server";
server_universe.concat_duplicates = 0;
server_universe.lookup_func = lookup_hashed_option;
server_universe.option_state_dereference =
hashed_option_state_dereference;
server_universe.save_func = save_hashed_option;
server_universe.delete_func = delete_hashed_option;
server_universe.encapsulate = hashed_option_space_encapsulate;
server_universe.foreach = hashed_option_space_foreach;
server_universe.length_size = 1; /* Never used ... */
server_universe.tag_size = 4;
server_universe.store_tag = putUChar;
server_universe.store_length = putUChar;
server_universe.site_code_min = 0;
server_universe.end = 0;
server_universe.index = universe_count++;
universes [server_universe.index] = &server_universe;
if (!option_name_new_hash(&server_universe.name_hash,
SERVER_HASH_SIZE, MDL) ||
!option_code_new_hash(&server_universe.code_hash,
SERVER_HASH_SIZE, MDL))
log_fatal ("Can't allocate server option hash table.");
for (i = 0 ; server_options[i].name ; i++) {
option_code_hash_add(server_universe.code_hash,
&server_options[i].code, 0,
&server_options[i], MDL);
option_name_hash_add(server_universe.name_hash,
server_options[i].name, 0,
&server_options[i], MDL);
}
#if defined(REPORT_HASH_PERFORMANCE)
log_info("Server-Config Option name hash: %s",
option_name_hash_report(server_universe.name_hash));
log_info("Server-Config Option code hash: %s",
option_code_hash_report(server_universe.code_hash));
#endif
/* Add the server and agent option spaces to the option space hash. */
universe_hash_add (universe_hash,
agent_universe.name, 0, &agent_universe, MDL);
universe_hash_add (universe_hash,
server_universe.name, 0, &server_universe, MDL);
/* Make the server universe the configuration option universe. */
config_universe = &server_universe;
code = SV_VENDOR_OPTION_SPACE;
option_code_hash_lookup(&vendor_cfg_option, server_universe.code_hash,
&code, 0, MDL);
}