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authorRemko Tronçon <git@el-tramo.be>2009-12-03 20:06:33 (GMT)
committerRemko Tronçon <git@el-tramo.be>2009-12-03 20:06:33 (GMT)
commit5df50c35e1baeee517a0895a2c8a2cc2052b087f (patch)
treeb9d90fd123ec251ebb930cfcfaa2ffc805433812 /3rdParty/CAres/src/ares_private.h
parent9b3edba27b8683f1a87ad66ee05802dd93bbbdfc (diff)
downloadswift-contrib-5df50c35e1baeee517a0895a2c8a2cc2052b087f.zip
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Added C-Ares.
Diffstat (limited to '3rdParty/CAres/src/ares_private.h')
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diff --git a/3rdParty/CAres/src/ares_private.h b/3rdParty/CAres/src/ares_private.h
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+#ifndef __ARES_PRIVATE_H
+#define __ARES_PRIVATE_H
+
+/* $Id: ares_private.h,v 1.50 2009-11-09 12:56:50 yangtse Exp $ */
+
+/* Copyright 1998 by the Massachusetts Institute of Technology.
+ * Copyright (C) 2004-2009 by Daniel Stenberg
+ *
+ * Permission to use, copy, modify, and distribute this
+ * software and its documentation for any purpose and without
+ * fee is hereby granted, provided that the above copyright
+ * notice appear in all copies and that both that copyright
+ * notice and this permission notice appear in supporting
+ * documentation, and that the name of M.I.T. not be used in
+ * advertising or publicity pertaining to distribution of the
+ * software without specific, written prior permission.
+ * M.I.T. makes no representations about the suitability of
+ * this software for any purpose. It is provided "as is"
+ * without express or implied warranty.
+ */
+
+/*
+ * Define WIN32 when build target is Win32 API
+ */
+
+#if (defined(_WIN32) || defined(__WIN32__)) && !defined(WIN32)
+#define WIN32
+#endif
+
+#include <stdio.h>
+#include <sys/types.h>
+
+#ifdef HAVE_NETINET_IN_H
+#include <netinet/in.h>
+#endif
+
+#ifdef WATT32
+#include <tcp.h>
+#include <sys/ioctl.h>
+#define writev(s,v,c) writev_s(s,v,c)
+#define HAVE_WRITEV 1
+#endif
+
+#ifdef NETWARE
+#include <time.h>
+#endif
+
+#define DEFAULT_TIMEOUT 5000 /* milliseconds */
+#define DEFAULT_TRIES 4
+#ifndef INADDR_NONE
+#define INADDR_NONE 0xffffffff
+#endif
+
+#if defined(WIN32) && !defined(WATT32)
+
+#define IS_NT() ((int)GetVersion() > 0)
+#define WIN_NS_9X "System\\CurrentControlSet\\Services\\VxD\\MSTCP"
+#define WIN_NS_NT_KEY "System\\CurrentControlSet\\Services\\Tcpip\\Parameters"
+#define NAMESERVER "NameServer"
+#define DHCPNAMESERVER "DhcpNameServer"
+#define DATABASEPATH "DatabasePath"
+#define WIN_PATH_HOSTS "\\hosts"
+
+#elif defined(WATT32)
+
+#define PATH_RESOLV_CONF "/dev/ENV/etc/resolv.conf"
+
+#elif defined(NETWARE)
+
+#define PATH_RESOLV_CONF "sys:/etc/resolv.cfg"
+#define PATH_HOSTS "sys:/etc/hosts"
+
+#elif defined(__riscos__)
+
+#define PATH_HOSTS "InetDBase:Hosts"
+
+#else
+
+#define PATH_RESOLV_CONF "/etc/resolv.conf"
+#ifdef ETC_INET
+#define PATH_HOSTS "/etc/inet/hosts"
+#else
+#define PATH_HOSTS "/etc/hosts"
+#endif
+
+#endif
+
+#define ARES_ID_KEY_LEN 31
+
+#include "ares_ipv6.h"
+#include "ares_llist.h"
+
+#ifndef HAVE_STRDUP
+# include "ares_strdup.h"
+# define strdup(ptr) ares_strdup(ptr)
+#endif
+
+#ifndef HAVE_STRCASECMP
+# include "ares_strcasecmp.h"
+# define strcasecmp(p1,p2) ares_strcasecmp(p1,p2)
+#endif
+
+#ifndef HAVE_STRNCASECMP
+# include "ares_strcasecmp.h"
+# define strncasecmp(p1,p2,n) ares_strncasecmp(p1,p2,n)
+#endif
+
+#ifndef HAVE_WRITEV
+# include "ares_writev.h"
+# define writev(s,ptr,cnt) ares_writev(s,ptr,cnt)
+#endif
+
+struct ares_addr {
+ int family;
+ union {
+ struct in_addr addr4;
+ struct in6_addr addr6;
+ } addr;
+};
+#define addrV4 addr.addr4
+#define addrV6 addr.addr6
+
+struct query;
+
+struct send_request {
+ /* Remaining data to send */
+ const unsigned char *data;
+ size_t len;
+
+ /* The query for which we're sending this data */
+ struct query* owner_query;
+ /* The buffer we're using, if we have our own copy of the packet */
+ unsigned char *data_storage;
+
+ /* Next request in queue */
+ struct send_request *next;
+};
+
+struct server_state {
+ struct in_addr addr;
+ ares_socket_t udp_socket;
+ ares_socket_t tcp_socket;
+
+ /* Mini-buffer for reading the length word */
+ unsigned char tcp_lenbuf[2];
+ int tcp_lenbuf_pos;
+ int tcp_length;
+
+ /* Buffer for reading actual TCP data */
+ unsigned char *tcp_buffer;
+ int tcp_buffer_pos;
+
+ /* TCP output queue */
+ struct send_request *qhead;
+ struct send_request *qtail;
+
+ /* Which incarnation of this connection is this? We don't want to
+ * retransmit requests into the very same socket, but if the server
+ * closes on us and we re-open the connection, then we do want to
+ * re-send. */
+ int tcp_connection_generation;
+
+ /* Circular, doubly-linked list of outstanding queries to this server */
+ struct list_node queries_to_server;
+
+ /* Link back to owning channel */
+ ares_channel channel;
+
+ /* Is this server broken? We mark connections as broken when a
+ * request that is queued for sending times out.
+ */
+ int is_broken;
+};
+
+/* State to represent a DNS query */
+struct query {
+ /* Query ID from qbuf, for faster lookup, and current timeout */
+ unsigned short qid;
+ struct timeval timeout;
+
+ /*
+ * Links for the doubly-linked lists in which we insert a query.
+ * These circular, doubly-linked lists that are hash-bucketed based
+ * the attributes we care about, help making most important
+ * operations O(1).
+ */
+ struct list_node queries_by_qid; /* hopefully in same cache line as qid */
+ struct list_node queries_by_timeout;
+ struct list_node queries_to_server;
+ struct list_node all_queries;
+
+ /* Query buf with length at beginning, for TCP transmission */
+ unsigned char *tcpbuf;
+ int tcplen;
+
+ /* Arguments passed to ares_send() (qbuf points into tcpbuf) */
+ const unsigned char *qbuf;
+ int qlen;
+ ares_callback callback;
+ void *arg;
+
+ /* Query status */
+ int try; /* Number of times we tried this query already. */
+ int server; /* Server this query has last been sent to. */
+ struct query_server_info *server_info; /* per-server state */
+ int using_tcp;
+ int error_status;
+ int timeouts; /* number of timeouts we saw for this request */
+};
+
+/* Per-server state for a query */
+struct query_server_info {
+ int skip_server; /* should we skip server, due to errors, etc? */
+ int tcp_connection_generation; /* into which TCP connection did we send? */
+};
+
+/* An IP address pattern; matches an IP address X if X & mask == addr */
+#define PATTERN_MASK 0x1
+#define PATTERN_CIDR 0x2
+
+struct apattern {
+ union
+ {
+ struct in_addr addr4;
+ struct in6_addr addr6;
+ } addr;
+ union
+ {
+ struct in_addr addr4;
+ struct in6_addr addr6;
+ unsigned short bits;
+ } mask;
+ int family;
+ unsigned short type;
+};
+
+typedef struct rc4_key
+{
+ unsigned char state[256];
+ unsigned char x;
+ unsigned char y;
+} rc4_key;
+
+struct ares_channeldata {
+ /* Configuration data */
+ int flags;
+ int timeout; /* in milliseconds */
+ int tries;
+ int ndots;
+ int rotate; /* if true, all servers specified are used */
+ int udp_port;
+ int tcp_port;
+ int socket_send_buffer_size;
+ int socket_receive_buffer_size;
+ char **domains;
+ int ndomains;
+ struct apattern *sortlist;
+ int nsort;
+ char *lookups;
+
+ int optmask; /* the option bitfield passed in at init time */
+
+ /* Server addresses and communications state */
+ struct server_state *servers;
+ int nservers;
+
+ /* ID to use for next query */
+ unsigned short next_id;
+ /* key to use when generating new ids */
+ rc4_key id_key;
+
+ /* Generation number to use for the next TCP socket open/close */
+ int tcp_connection_generation;
+
+ /* The time at which we last called process_timeouts(). Uses integer seconds
+ just to draw the line somewhere. */
+ time_t last_timeout_processed;
+
+ /* Last server we sent a query to. */
+ int last_server;
+
+ /* Circular, doubly-linked list of queries, bucketed various ways.... */
+ /* All active queries in a single list: */
+ struct list_node all_queries;
+ /* Queries bucketed by qid, for quickly dispatching DNS responses: */
+#define ARES_QID_TABLE_SIZE 2048
+ struct list_node queries_by_qid[ARES_QID_TABLE_SIZE];
+ /* Queries bucketed by timeout, for quickly handling timeouts: */
+#define ARES_TIMEOUT_TABLE_SIZE 1024
+ struct list_node queries_by_timeout[ARES_TIMEOUT_TABLE_SIZE];
+
+ ares_sock_state_cb sock_state_cb;
+ void *sock_state_cb_data;
+
+ ares_sock_create_callback sock_create_cb;
+ void *sock_create_cb_data;
+};
+
+/* return true if now is exactly check time or later */
+int ares__timedout(struct timeval *now,
+ struct timeval *check);
+/* add the specific number of milliseconds to the time in the first argument */
+int ares__timeadd(struct timeval *now,
+ int millisecs);
+/* return time offset between now and (future) check, in milliseconds */
+long ares__timeoffset(struct timeval *now,
+ struct timeval *check);
+/* returns ARES_SUCCESS if library has been initialized */
+int ares_library_initialized(void);
+void ares__rc4(rc4_key* key,unsigned char *buffer_ptr, int buffer_len);
+void ares__send_query(ares_channel channel, struct query *query,
+ struct timeval *now);
+void ares__close_sockets(ares_channel channel, struct server_state *server);
+int ares__get_hostent(FILE *fp, int family, struct hostent **host);
+int ares__read_line(FILE *fp, char **buf, size_t *bufsize);
+void ares__free_query(struct query *query);
+unsigned short ares__generate_new_id(rc4_key* key);
+struct timeval ares__tvnow(void);
+int ares__expand_name_for_response(const unsigned char *encoded,
+ const unsigned char *abuf, int alen,
+ char **s, long *enclen);
+#if 0 /* Not used */
+long ares__tvdiff(struct timeval t1, struct timeval t2);
+#endif
+
+#define ARES_SWAP_BYTE(a,b) \
+ { unsigned char swapByte = *(a); *(a) = *(b); *(b) = swapByte; }
+
+#define SOCK_STATE_CALLBACK(c, s, r, w) \
+ do { \
+ if ((c)->sock_state_cb) \
+ (c)->sock_state_cb((c)->sock_state_cb_data, (s), (r), (w)); \
+ } while (0)
+
+#ifdef CURLDEBUG
+/* This is low-level hard-hacking memory leak tracking and similar. Using the
+ libcurl lowlevel code from within library is ugly and only works when
+ c-ares is built and linked with a similarly curldebug-enabled libcurl,
+ but we do this anyway for convenience. */
+#include "../lib/memdebug.h"
+#endif
+
+#endif /* __ARES_PRIVATE_H */