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Diffstat (limited to 'src/dns_private.h')
| -rw-r--r-- | src/dns_private.h | 209 |
1 files changed, 0 insertions, 209 deletions
diff --git a/src/dns_private.h b/src/dns_private.h deleted file mode 100644 index 1c1df8ded..000000000 --- a/src/dns_private.h +++ /dev/null @@ -1,209 +0,0 @@ -/* Copyright (c) 2014, Vsevolod Stakhov - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions are met: - * * Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * * Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * - * THIS SOFTWARE IS PROVIDED ''AS IS'' AND ANY - * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED - * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE - * DISCLAIMED. IN NO EVENT SHALL AUTHOR BE LIABLE FOR ANY - * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES - * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; - * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND - * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS - * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - */ - -#ifndef DNS_PRIVATE_H_ -#define DNS_PRIVATE_H_ - -#include "config.h" - -#define MAX_SERVERS 16 -/* Upstream timeouts */ -#define DEFAULT_UPSTREAM_ERROR_TIME 10 -#define DEFAULT_UPSTREAM_DEAD_TIME 300 -#define DEFAULT_UPSTREAM_MAXERRORS 10 - -static const unsigned base = 36; -static const unsigned t_min = 1; -static const unsigned t_max = 26; -static const unsigned skew = 38; -static const unsigned damp = 700; -static const unsigned initial_n = 128; -static const unsigned initial_bias = 72; - -static const gint dns_port = 53; - -#define UDP_PACKET_SIZE 4096 - -#define DNS_COMPRESSION_BITS 0xC0 - -#define DNS_D_MAXLABEL 63 /* + 1 '\0' */ -#define DNS_D_MAXNAME 255 /* + 1 '\0' */ - -#define RESOLV_CONF "/etc/resolv.conf" - -/** - * Represents DNS server - */ -struct rspamd_dns_server { - struct upstream up; /**< upstream structure */ - gchar *name; /**< name of DNS server */ - struct rspamd_dns_io_channel *io_channels; - struct rspamd_dns_io_channel *cur_io_channel; -}; - -/** - * IO channel for a specific DNS server - */ -struct rspamd_dns_io_channel { - struct rspamd_dns_server *srv; - struct rspamd_dns_resolver *resolver; - gint sock; /**< persistent socket */ - struct event ev; - GHashTable *requests; /**< requests in flight */ - struct rspamd_dns_io_channel *prev, *next; -}; - - -struct rspamd_dns_resolver { - struct rspamd_dns_server servers[MAX_SERVERS]; - gint servers_num; /**< number of DNS servers registered */ - guint request_timeout; - guint max_retransmits; - guint max_errors; - GHashTable *io_channels; /**< hash of io chains indexed by socket */ - gboolean throttling; /**< dns servers are busy */ - gboolean is_master_slave; /**< if this is true, then select upstreams as master/slave */ - guint errors; /**< resolver errors */ - struct timeval throttling_time; /**< throttling time */ - struct event throttling_event; /**< throttling event */ - struct event_base *ev_base; /**< base for event ops */ -}; - -struct dns_header; -struct dns_query; - -/* Internal DNS structs */ - -struct dns_header { - guint qid :16; - -#if BYTE_ORDER == BIG_ENDIAN - guint qr:1; - guint opcode:4; - guint aa:1; - guint tc:1; - guint rd:1; - - guint ra:1; - guint unused:3; - guint rcode:4; -#else - guint rd :1; - guint tc :1; - guint aa :1; - guint opcode :4; - guint qr :1; - - guint rcode :4; - guint unused :3; - guint ra :1; -#endif - - guint qdcount :16; - guint ancount :16; - guint nscount :16; - guint arcount :16; -}; - -enum dns_section { - DNS_S_QD = 0x01, -#define DNS_S_QUESTION DNS_S_QD - - DNS_S_AN = 0x02, -#define DNS_S_ANSWER DNS_S_AN - - DNS_S_NS = 0x04, -#define DNS_S_AUTHORITY DNS_S_NS - - DNS_S_AR = 0x08, -#define DNS_S_ADDITIONAL DNS_S_AR - - DNS_S_ALL = 0x0f -}; -/* enum dns_section */ - -enum dns_opcode { - DNS_OP_QUERY = 0, - DNS_OP_IQUERY = 1, - DNS_OP_STATUS = 2, - DNS_OP_NOTIFY = 4, - DNS_OP_UPDATE = 5, -}; -/* dns_opcode */ - -enum dns_class { - DNS_C_IN = 1, - - DNS_C_ANY = 255 -}; -/* enum dns_class */ - -struct dns_query { - gchar *qname; - guint qtype :16; - guint qclass :16; -}; - -enum dns_type { - DNS_T_A = 1, - DNS_T_NS = 2, - DNS_T_CNAME = 5, - DNS_T_SOA = 6, - DNS_T_PTR = 12, - DNS_T_MX = 15, - DNS_T_TXT = 16, - DNS_T_AAAA = 28, - DNS_T_SRV = 33, - DNS_T_OPT = 41, - DNS_T_SSHFP = 44, - DNS_T_SPF = 99, - - DNS_T_ALL = 255 -}; -/* enum dns_type */ - -static const gchar dns_rcodes[16][16] = { - [DNS_RC_NOERROR] = "NOERROR", - [DNS_RC_FORMERR] = "FORMERR", - [DNS_RC_SERVFAIL] = "SERVFAIL", - [DNS_RC_NXDOMAIN] = "NXDOMAIN", - [DNS_RC_NOTIMP] = "NOTIMP", - [DNS_RC_REFUSED] = "REFUSED", - [DNS_RC_YXDOMAIN] = "YXDOMAIN", - [DNS_RC_YXRRSET] = "YXRRSET", - [DNS_RC_NXRRSET] = "NXRRSET", - [DNS_RC_NOTAUTH] = "NOTAUTH", - [DNS_RC_NOTZONE] = "NOTZONE", -}; - -static const gchar dns_types[7][16] = { - [DNS_REQUEST_A] = "A request", - [DNS_REQUEST_PTR] = "PTR request", - [DNS_REQUEST_MX] = "MX request", - [DNS_REQUEST_TXT] = "TXT request", - [DNS_REQUEST_SRV] = "SRV request", - [DNS_REQUEST_SPF] = "SPF request", - [DNS_REQUEST_AAA] = "AAA request" -}; - -#endif /* DNS_PRIVATE_H_ */ |