3 #ifndef ADNS_INTERNAL_H_INCLUDED
4 #define ADNS_INTERNAL_H_INCLUDED
6 #define PRINTFFORMAT(a,b) __attribute__((format(printf,a,b)))
7 typedef unsigned char byte
;
17 /* Configuration and constants */
20 #define MAXUDPRETRIES 15
21 #define UDPRETRYMS 2000
23 #define LOCALRESOURCEMS 20
24 #define MAXUDPDGRAM 512
28 /* Shared data structures */
50 /* FIXME: make sure this is all init'd properly */
51 enum { query_udp
, query_tcpwait
, query_tcpsent
, query_child
, query_done
} state
;
52 adns_query back
, next
, parent
;
53 struct { adns_query head
, tail
; } children
;
54 struct { adns_query back
, next
; } siblings
;
57 int id
, flags
, udpretries
;
59 unsigned long udpsent
, tcpfailed
; /* bitmap indexed by server */
60 struct timeval timeout
;
65 /* After the owner name and nul comes the query message, pointed to by querymsg */
69 * state Queue child id answer nextudpserver sentudp failedtcp
71 * udp NONE null >=0 null 0 zero zero
72 * udp timew null >=0 null any nonzero zero
73 * udp NONE null >=0 null any nonzero zero
75 * tcpwait timew null >=0 null irrelevant zero any
76 * tcpsent timew null >=0 null irrelevant zero any
78 * child childw set >=0 partial irrelevant irrelevant irrelevant
79 * done output null -1 set/null irrelevant irrelevant irrelevant
81 * +------------------------+
82 * START -----> | udp/NONE |
83 * +------------------------+
85 * too big for UDP / UDP timeout \ \ send via UDP
86 * do this ASAP! / more retries \ \ do this ASAP!
88 * +---------------+ +-----------+
89 * | tcpwait/timew | ____ | udp/timew |
90 * +---------------+ \ +-----------+
92 * TCP conn'd; | | TCP died | | |
93 * send via TCP | | more | UDP timeout | |
94 * do this ASAP! | | servers | no more | |
95 * v | to try | retries | |
96 * +---------------+ | desired | |
97 * | tcpsent/timew | ____ | | |
98 * +---------------+ \| | |
99 * \ \ TCP died | TCP | |
100 * \ \ no more | timeout / |
104 * reply \ _| +------------------+ / reply
105 * \ | done/output FAIL | /
106 * \ +------------------+ /
109 * (..... got reply ....)
111 * need child query/ies / \ no child query
114 * +--------------+ +----------------+
115 * | child/childw | ----------------> | done/output OK |
116 * +--------------+ children done +----------------+
121 adns_initflags iflags
;
123 struct { adns_query head
, tail
; } timew
, childw
, output
;
124 int nextid
, udpsocket
, tcpsocket
;
125 vbuf rqbuf
, tcpsend
, tcprecv
;
126 int nservers
, tcpserver
;
127 enum adns__tcpstate
{ server_disconnected
, server_connecting
, server_ok
} tcpstate
;
128 struct timeval tcptimeout
;
131 } servers
[MAXSERVERS
];
136 void adns__vdiag(adns_state ads
, const char *pfx
, adns_initflags prevent
,
137 int serv
, const char *fmt
, va_list al
);
138 void adns__debug(adns_state ads
, int serv
, const char *fmt
, ...) PRINTFFORMAT(3,4);
139 void adns__warn(adns_state ads
, int serv
, const char *fmt
, ...) PRINTFFORMAT(3,4);
140 void adns__diag(adns_state ads
, int serv
, const char *fmt
, ...) PRINTFFORMAT(3,4);
142 int adns__vbuf_ensure(vbuf
*vb
, int want
);
143 int adns__vbuf_append(vbuf
*vb
, const byte
*data
, int len
);
144 /* 1=>success, 0=>realloc failed */
145 void adns__vbuf_appendq(vbuf
*vb
, const byte
*data
, int len
);
146 void adns__vbuf_init(vbuf
*vb
);
148 int adns__setnonblock(adns_state ads
, int fd
); /* => errno value */
152 void adns__query_nomem(adns_state ads
, adns_query qu
);
153 void adns__query_fail(adns_state ads
, adns_query qu
, adns_status stat
);
157 void adns__query_udp(adns_state ads
, adns_query qu
, struct timeval now
);
158 void adns__query_tcp(adns_state ads
, adns_query qu
, struct timeval now
);
159 adns_status
adns__mkquery(adns_state ads
, const char *owner
, int ol
, int id
,
160 adns_rrtype type
, adns_queryflags flags
);
164 void adns__procdgram(adns_state ads
, const byte
*dgram
, int len
, int serv
);
168 void adns__tcp_broken(adns_state ads
, const char *what
, const char *why
);
169 void adns__tcp_tryconnect(adns_state ads
, struct timeval now
);
170 void adns__autosys(adns_state ads
, struct timeval now
);
172 /* Useful static inline functions: */
174 static inline void timevaladd(struct timeval
*tv_io
, long ms
) {
178 tmp
.tv_usec
+= (ms
%1000)*1000;
179 tmp
.tv_sec
+= ms
/1000;
180 if (tmp
.tv_usec
>= 1000) { tmp
.tv_sec
++; tmp
.tv_usec
-= 1000; }
184 static inline int ctype_whitespace(int c
) { return c
==' ' || c
=='\n' || c
=='\t'; }
185 static inline int ctype_digit(int c
) { return c
>='0' && c
<='9'; }
189 #define LIST_INIT(list) ((list).head= (list).tail= 0)
191 #define LIST_UNLINK_PART(list,node,part) \
193 if ((node)->back) (node)->back->part next= (node)->part next; \
194 else (list).head= (node)->part next; \
195 if ((node)->next) (node)->next->part back= (node)->part back; \
196 else (list).tail= (node)->part back; \
199 #define LIST_LINK_TAIL_PART(list,node,part) \
201 (node)->part back= 0; \
202 (node)->part next= (list).tail; \
203 if ((list).tail) (list).tail->part back= (node); else (list).part head= (node); \
204 (list).tail= (node); \
207 #define LIST_UNLINK(list,node) LIST_UNLINK_PART(list,node,)
208 #define LIST_LINK_TAIL(list,node) LIST_LINK_TAIL_PART(list,node,)