3 * - configuration file parsing
4 * - management of global state
7 * This file is part of adns, which is
8 * Copyright (C) 1997-2000,2003,2006,2014 Ian Jackson
9 * Copyright (C) 2014 Mark Wooding
10 * Copyright (C) 1999-2000,2003,2006 Tony Finch
11 * Copyright (C) 1991 Massachusetts Institute of Technology
12 * (See the file INSTALL for full details.)
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License as published by
16 * the Free Software Foundation; either version 3, or (at your option)
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, write to the Free Software Foundation.
34 #include <sys/types.h>
36 #include <sys/socket.h>
37 #include <netinet/in.h>
38 #include <arpa/inet.h>
42 static void readconfig(adns_state ads
, const char *filename
, int warnmissing
);
44 static void addserver(adns_state ads
, const struct sockaddr
*sa
, int salen
) {
47 char buf
[ADNS_ADDR2TEXT_BUFLEN
];
49 for (i
=0; i
<ads
->nservers
; i
++) {
50 if (adns__sockaddrs_equal(sa
, &ads
->servers
[i
].addr
.sa
)) {
51 adns__debug(ads
,-1,0,"duplicate nameserver %s ignored",
52 adns__sockaddr_ntoa(sa
, buf
));
57 if (ads
->nservers
>=MAXSERVERS
) {
58 adns__diag(ads
,-1,0,"too many nameservers, ignoring %s",
59 adns__sockaddr_ntoa(sa
, buf
));
63 ss
= ads
->servers
+ads
->nservers
;
64 assert(salen
<= sizeof(ss
->addr
));
66 memcpy(&ss
->addr
, sa
, salen
);
70 static void freesearchlist(adns_state ads
) {
71 if (ads
->nsearchlist
) free(*ads
->searchlist
);
72 free(ads
->searchlist
);
75 static void saveerr(adns_state ads
, int en
) {
76 if (!ads
->configerrno
) ads
->configerrno
= en
;
79 static void configparseerr(adns_state ads
, const char *fn
, int lno
,
80 const char *fmt
, ...) {
84 if (!ads
->logfn
|| (ads
->iflags
& adns_if_noerrprint
)) return;
86 if (lno
==-1) adns__lprintf(ads
,"adns: %s: ",fn
);
87 else adns__lprintf(ads
,"adns: %s:%d: ",fn
,lno
);
89 adns__vlprintf(ads
,fmt
,al
);
91 adns__lprintf(ads
,"\n");
94 static int nextword(const char **bufp_io
, const char **word_r
, int *l_r
) {
98 while (ctype_whitespace(*p
)) p
++;
102 while (*q
&& !ctype_whitespace(*q
)) q
++;
111 static void ccf_nameserver(adns_state ads
, const char *fn
,
112 int lno
, const char *buf
) {
114 char addrbuf
[ADNS_ADDR2TEXT_BUFLEN
];
117 a
.len
= sizeof(a
.addr
);
118 err
= adns_text2addr(buf
,DNS_PORT
, 0, &a
.addr
.sa
,&a
.len
);
123 configparseerr(ads
,fn
,lno
,"invalid nameserver address `%s'",buf
);
126 configparseerr(ads
,fn
,lno
,"failed to parse nameserver address `%s': %s",
130 adns__debug(ads
,-1,0,"using nameserver %s",
131 adns__sockaddr_ntoa(&a
.addr
.sa
, addrbuf
));
132 addserver(ads
,&a
.addr
.sa
,a
.len
);
135 static void ccf_search(adns_state ads
, const char *fn
,
136 int lno
, const char *buf
) {
137 const char *bufp
, *word
;
138 char *newchars
, **newptrs
, **pp
;
146 while (nextword(&bufp
,&word
,&l
)) { count
++; tl
+= l
+1; }
148 newptrs
= malloc(sizeof(char*)*count
);
149 if (!newptrs
) { saveerr(ads
,errno
); return; }
151 newchars
= malloc(tl
);
152 if (!newchars
) { saveerr(ads
,errno
); free(newptrs
); return; }
156 while (nextword(&bufp
,&word
,&l
)) {
158 memcpy(newchars
,word
,l
);
164 ads
->nsearchlist
= count
;
165 ads
->searchlist
= newptrs
;
168 static int gen_pton(const char *text
, int want_af
, adns_sockaddr
*a
) {
173 err
= adns_text2addr(text
,0, adns_qf_addrlit_scope_forbid
,
175 if (err
) { assert(err
== EINVAL
); return 0; }
176 if (want_af
!= AF_UNSPEC
&& a
->sa
.sa_family
!= want_af
) return 0;
180 static void ccf_sortlist(adns_state ads
, const char *fn
,
181 int lno
, const char *buf
) {
183 char tbuf
[200], *slash
, *ep
;
184 const char *maskwhat
;
192 while (nextword(&buf
,&word
,&l
)) {
193 if (ads
->nsortlist
>= MAXSORTLIST
) {
194 adns__diag(ads
,-1,0,"too many sortlist entries,"
195 " ignoring %.*s onwards",l
,word
);
199 if (l
>= sizeof(tbuf
)) {
200 configparseerr(ads
,fn
,lno
,"sortlist entry `%.*s' too long",l
,word
);
204 memcpy(tbuf
,word
,l
); tbuf
[l
]= 0;
205 slash
= strchr(tbuf
,'/');
206 if (slash
) *slash
++= 0;
208 sl
= &ads
->sortlist
[ads
->nsortlist
];
209 if (!gen_pton(tbuf
, AF_UNSPEC
, &sl
->base
)) {
210 configparseerr(ads
,fn
,lno
,"invalid address `%s' in sortlist",tbuf
);
215 if (slash
[strspn(slash
, "0123456789")]) {
217 if (!gen_pton(slash
, sl
->base
.sa
.sa_family
, &sl
->mask
)) {
218 configparseerr(ads
,fn
,lno
,"invalid mask `%s' in sortlist",slash
);
222 maskwhat
= "prefix length";
223 initial
= strtoul(slash
,&ep
,10);
224 if (*ep
|| initial
>adns__addr_width(sl
->base
.sa
.sa_family
)) {
225 configparseerr(ads
,fn
,lno
,"mask length `%s' invalid",slash
);
228 sl
->mask
.sa
.sa_family
= sl
->base
.sa
.sa_family
;
229 adns__prefix_mask(&sl
->mask
, initial
);
232 maskwhat
= "implied prefix length";
233 initial
= adns__guess_prefix_length(&sl
->base
);
235 configparseerr(ads
,fn
,lno
, "network address `%s'"
236 " in sortlist is not in classed ranges,"
237 " must specify mask explicitly", tbuf
);
240 sl
->mask
.sa
.sa_family
= sl
->base
.sa
.sa_family
;
241 adns__prefix_mask(&sl
->mask
, initial
);
244 if (!adns__addr_matches(sl
->base
.sa
.sa_family
,
245 adns__sockaddr_addr(&sl
->base
.sa
),
246 &sl
->base
,&sl
->mask
)) {
248 configparseerr(ads
,fn
,lno
, "%s %d in sortlist"
249 " overlaps address `%s'",maskwhat
,initial
,tbuf
);
251 configparseerr(ads
,fn
,lno
, "%s `%s' in sortlist"
252 " overlaps address `%s'",maskwhat
,slash
,tbuf
);
261 static void ccf_options(adns_state ads
, const char *fn
,
262 int lno
, const char *buf
) {
263 const char *opt
, *word
, *endword
, *endopt
;
270 #define OPTION__IS(s,op) ((endword-word) op (sizeof(s)-1) && \
271 !memcmp(word,s,(sizeof(s)-1)))
272 #define OPTION_IS(s) (OPTION__IS(s,==))
273 #define OPTION_STARTS(s) (OPTION__IS(s,>=) ? ((word+=sizeof(s)-1)) : 0)
275 while (nextword(&buf
,&word
,&l
)) {
277 endopt
=endword
=word
+l
;
278 if (OPTION_IS("debug")) {
279 ads
->iflags
|= adns_if_debug
;
282 if (OPTION_STARTS("ndots:")) {
283 v
= strtoul(word
,&ep
,10);
284 if (ep
==word
|| ep
!= endword
|| v
> INT_MAX
) {
285 configparseerr(ads
,fn
,lno
,"option `%.*s' malformed"
286 " or has bad value",l
,opt
);
292 if (OPTION_STARTS("adns_checkc:")) {
293 if (OPTION_IS("none")) {
294 ads
->iflags
&= ~adns_if_checkc_freq
;
295 ads
->iflags
|= adns_if_checkc_entex
;
296 } else if (OPTION_IS("entex")) {
297 ads
->iflags
&= ~adns_if_checkc_freq
;
298 ads
->iflags
|= adns_if_checkc_entex
;
299 } else if (OPTION_IS("freq")) {
300 ads
->iflags
|= adns_if_checkc_freq
;
302 configparseerr(ads
,fn
,lno
, "option adns_checkc has bad value `%s' "
303 "(must be none, entex or freq", word
);
307 if (OPTION_STARTS("adns_af:")) {
308 ads
->iflags
&= ~adns_if_afmask
;
309 if (!OPTION_IS("any")) for (;;) {
310 const char *comma
= memchr(word
,',',endopt
-word
);
311 endword
=comma?comma
:endopt
;
312 if (OPTION_IS("ipv4"))
313 ads
->iflags
|= adns_if_permit_ipv4
;
314 else if (OPTION_IS("ipv6"))
315 ads
->iflags
|= adns_if_permit_ipv6
;
317 configparseerr(ads
,fn
,lno
, "option adns_af has bad value `%.*s' "
318 "(must be `any' or list {`ipv4',`ipv6'},...)",
319 (int)(endword
-word
), word
);
327 if (OPTION_IS("adns_ignoreunkcfg")) {
328 ads
->config_report_unknown
=0;
331 if (/* adns's query strategy is not configurable */
332 OPTION_STARTS("timeout:") ||
333 OPTION_STARTS("attempts:") ||
334 OPTION_IS("rotate") ||
335 /* adns provides the application with knob for this */
336 OPTION_IS("no-check-names") ||
337 /* adns normally does IPv6 if the application wants it; control
338 * this with the adns_af: option if you like */
339 OPTION_IS("inet6") ||
340 /* adns does not do edns0 and this is not a problem */
343 if (ads
->config_report_unknown
)
344 adns__diag(ads
,-1,0,"%s:%d: unknown option `%.*s'", fn
,lno
, l
,opt
);
352 static void ccf_clearnss(adns_state ads
, const char *fn
,
353 int lno
, const char *buf
) {
357 static void ccf_include(adns_state ads
, const char *fn
,
358 int lno
, const char *buf
) {
360 configparseerr(ads
,fn
,lno
,"`include' directive with no filename");
363 readconfig(ads
,buf
,1);
366 static void ccf_lookup(adns_state ads
, const char *fn
, int lno
,
373 configparseerr(ads
,fn
,lno
,"`lookup' directive with no databases");
377 while (nextword(&buf
,&word
,&l
)) {
378 if (l
==4 && !memcmp(word
,"bind",4)) {
380 } else if (l
==4 && !memcmp(word
,"file",4)) {
381 /* ignore this and hope /etc/hosts is not essential */
382 } else if (l
==2 && !memcmp(word
,"yp",2)) {
383 adns__diag(ads
,-1,0,"%s:%d: yp lookups not supported by adns", fn
,lno
);
386 if (ads
->config_report_unknown
)
387 adns__diag(ads
,-1,0,"%s:%d: unknown `lookup' database `%.*s'",
393 adns__diag(ads
,-1,0,"%s:%d: `lookup' specified, but not `bind'", fn
,lno
);
396 static void ccf_ignore(adns_state ads
, const char *fn
, int lno
,
400 static const struct configcommandinfo
{
402 void (*fn
)(adns_state ads
, const char *fn
, int lno
, const char *buf
);
403 } configcommandinfos
[]= {
404 { "nameserver", ccf_nameserver
},
405 { "domain", ccf_search
},
406 { "search", ccf_search
},
407 { "sortlist", ccf_sortlist
},
408 { "options", ccf_options
},
409 { "clearnameservers", ccf_clearnss
},
410 { "include", ccf_include
},
411 { "lookup", ccf_lookup
}, /* OpenBSD */
412 { "lwserver", ccf_ignore
}, /* BIND9 lwresd */
421 static int gl_file(adns_state ads
, getline_ctx
*src_io
, const char *filename
,
422 int lno
, char *buf
, int buflen
) {
423 FILE *file
= src_io
->file
;
431 for (;;) { /* loop over chars */
433 adns__diag(ads
,-1,0,"%s:%d: line too long, ignored",filename
,lno
);
438 adns__diag(ads
,-1,0,"%s:%d: line contains nul, ignored",filename
,lno
);
440 } else if (c
== '\n') {
442 } else if (c
== EOF
) {
445 adns__diag(ads
,-1,0,"%s:%d: read error: %s",
446 filename
,lno
,strerror(errno
));
462 while ((c
= getc(file
)) != EOF
&& c
!= '\n');
466 static int gl_text(adns_state ads
, getline_ctx
*src_io
, const char *filename
,
467 int lno
, char *buf
, int buflen
) {
468 const char *cp
= src_io
->text
;
471 if (!cp
|| !*cp
) return -1;
473 if (*cp
== ';' || *cp
== '\n') cp
++;
474 l
= strcspn(cp
,";\n");
478 adns__diag(ads
,-1,0,"%s:%d: line too long, ignored",filename
,lno
);
488 static void readconfiggeneric(adns_state ads
, const char *filename
,
489 int (*getline
)(adns_state ads
, getline_ctx
*,
490 const char *filename
, int lno
,
491 char *buf
, int buflen
),
492 /* Returns >=0 for success, -1 for EOF or error
493 * (error will have been reported), or -2 for
494 * bad line was encountered, try again.
496 getline_ctx gl_ctx
) {
497 char linebuf
[2000], *p
, *q
;
499 const struct configcommandinfo
*ccip
;
502 (l
= getline(ads
,&gl_ctx
, filename
,lno
, linebuf
,sizeof(linebuf
))) != -1;
504 if (l
== -2) continue;
505 while (l
>0 && ctype_whitespace(linebuf
[l
-1])) l
--;
508 while (ctype_whitespace(*p
)) p
++;
509 if (*p
== '#' || *p
== ';' || !*p
) continue;
511 while (*q
&& !ctype_whitespace(*q
)) q
++;
513 for (ccip
=configcommandinfos
;
515 !(strlen(ccip
->name
)==dirl
&& !memcmp(ccip
->name
,p
,q
-p
));
518 if (ads
->config_report_unknown
)
519 adns__diag(ads
,-1,0,"%s:%d: unknown configuration directive `%.*s'",
520 filename
,lno
,(int)(q
-p
),p
);
523 while (ctype_whitespace(*q
)) q
++;
524 ccip
->fn(ads
,filename
,lno
,q
);
528 static const char *instrum_getenv(adns_state ads
, const char *envvar
) {
531 value
= getenv(envvar
);
532 if (!value
) adns__debug(ads
,-1,0,"environment variable %s not set",envvar
);
533 else adns__debug(ads
,-1,0,"environment variable %s"
534 " set to `%s'",envvar
,value
);
538 static void readconfig(adns_state ads
, const char *filename
, int warnmissing
) {
541 gl_ctx
.file
= fopen(filename
,"r");
543 if (errno
== ENOENT
) {
545 adns__debug(ads
,-1,0, "configuration file"
546 " `%s' does not exist",filename
);
550 adns__diag(ads
,-1,0,"cannot open configuration file `%s': %s",
551 filename
,strerror(errno
));
555 readconfiggeneric(ads
,filename
,gl_file
,gl_ctx
);
560 static void readconfigtext(adns_state ads
, const char *text
,
561 const char *showname
) {
565 readconfiggeneric(ads
,showname
,gl_text
,gl_ctx
);
568 static void readconfigenv(adns_state ads
, const char *envvar
) {
569 const char *filename
;
571 if (ads
->iflags
& adns_if_noenv
) {
572 adns__debug(ads
,-1,0,"not checking environment variable `%s'",envvar
);
575 filename
= instrum_getenv(ads
,envvar
);
576 if (filename
) readconfig(ads
,filename
,1);
579 static void readconfigenvtext(adns_state ads
, const char *envvar
) {
580 const char *textdata
;
582 if (ads
->iflags
& adns_if_noenv
) {
583 adns__debug(ads
,-1,0,"not checking environment variable `%s'",envvar
);
586 textdata
= instrum_getenv(ads
,envvar
);
587 if (textdata
) readconfigtext(ads
,textdata
,envvar
);
591 int adns__setnonblock(adns_state ads
, int fd
) {
594 r
= fcntl(fd
,F_GETFL
,0); if (r
<0) return errno
;
596 r
= fcntl(fd
,F_SETFL
,r
); if (r
<0) return errno
;
600 static int init_begin(adns_state
*ads_r
, adns_initflags flags
,
601 adns_logcallbackfn
*logfn
, void *logfndata
) {
605 if (flags
& ~(adns_initflags
)(0x4fff))
606 /* 0x4000 is reserved for `harmless' future expansion */
609 ads
= malloc(sizeof(*ads
)); if (!ads
) return errno
;
613 ads
->logfndata
= logfndata
;
615 LIST_INIT(ads
->udpw
);
616 LIST_INIT(ads
->tcpw
);
617 LIST_INIT(ads
->childw
);
618 LIST_INIT(ads
->output
);
619 LIST_INIT(ads
->intdone
);
624 adns__vbuf_init(&ads
->tcpsend
);
625 adns__vbuf_init(&ads
->tcprecv
);
626 ads
->tcprecv_skip
= 0;
627 ads
->nservers
= ads
->nsortlist
= ads
->nsearchlist
= ads
->tcpserver
= 0;
629 ads
->tcpstate
= server_disconnected
;
630 timerclear(&ads
->tcptimeout
);
632 ads
->config_report_unknown
=1;
635 ads
->rand48xsubi
[0]= pid
;
636 ads
->rand48xsubi
[1]= (unsigned long)pid
>> 16;
637 ads
->rand48xsubi
[2]= pid
^ ((unsigned long)pid
>> 16);
643 static int init_finish(adns_state ads
) {
644 struct sockaddr_in sin
;
645 struct protoent
*proto
;
646 struct udpsocket
*udp
;
650 if (!ads
->nservers
) {
651 if (ads
->logfn
&& ads
->iflags
& adns_if_debug
)
652 adns__lprintf(ads
,"adns: no nameservers, using IPv4 localhost\n");
653 memset(&sin
, 0, sizeof(sin
));
654 sin
.sin_family
= AF_INET
;
655 sin
.sin_port
= htons(DNS_PORT
);
656 sin
.sin_addr
.s_addr
= htonl(INADDR_LOOPBACK
);
657 addserver(ads
,(struct sockaddr
*)&sin
, sizeof(sin
));
660 proto
= getprotobyname("udp"); if (!proto
) { r
= ENOPROTOOPT
; goto x_free
; }
662 for (i
=0; i
<ads
->nservers
; i
++) {
663 if (adns__udpsocket_by_af(ads
, ads
->servers
[i
].addr
.sa
.sa_family
))
665 assert(ads
->nudpsockets
< MAXUDP
);
666 udp
= &ads
->udpsockets
[ads
->nudpsockets
];
667 udp
->af
= ads
->servers
[i
].addr
.sa
.sa_family
;
668 udp
->fd
= socket(udp
->af
,SOCK_DGRAM
,proto
->p_proto
);
669 if (udp
->fd
< 0) { r
= errno
; goto x_free
; }
671 r
= adns__setnonblock(ads
,udp
->fd
);
672 if (r
) { r
= errno
; goto x_closeudp
; }
678 for (i
=0; i
<ads
->nudpsockets
; i
++) close(ads
->udpsockets
[i
].fd
);
684 static void init_abort(adns_state ads
) {
685 if (ads
->nsearchlist
) {
686 free(ads
->searchlist
[0]);
687 free(ads
->searchlist
);
692 static void logfn_file(adns_state ads
, void *logfndata
,
693 const char *fmt
, va_list al
) {
694 vfprintf(logfndata
,fmt
,al
);
697 static int init_files(adns_state
*ads_r
, adns_initflags flags
,
698 adns_logcallbackfn
*logfn
, void *logfndata
) {
700 const char *res_options
, *adns_res_options
;
703 r
= init_begin(&ads
, flags
, logfn
, logfndata
);
706 res_options
= instrum_getenv(ads
,"RES_OPTIONS");
707 adns_res_options
= instrum_getenv(ads
,"ADNS_RES_OPTIONS");
708 ccf_options(ads
,"RES_OPTIONS",-1,res_options
);
709 ccf_options(ads
,"ADNS_RES_OPTIONS",-1,adns_res_options
);
711 readconfig(ads
,"/etc/resolv.conf",1);
712 readconfig(ads
,"/etc/resolv-adns.conf",0);
713 readconfigenv(ads
,"RES_CONF");
714 readconfigenv(ads
,"ADNS_RES_CONF");
716 readconfigenvtext(ads
,"RES_CONF_TEXT");
717 readconfigenvtext(ads
,"ADNS_RES_CONF_TEXT");
719 ccf_options(ads
,"RES_OPTIONS",-1,res_options
);
720 ccf_options(ads
,"ADNS_RES_OPTIONS",-1,adns_res_options
);
722 ccf_search(ads
,"LOCALDOMAIN",-1,instrum_getenv(ads
,"LOCALDOMAIN"));
723 ccf_search(ads
,"ADNS_LOCALDOMAIN",-1,instrum_getenv(ads
,"ADNS_LOCALDOMAIN"));
725 if (ads
->configerrno
&& ads
->configerrno
!= EINVAL
) {
734 adns__consistency(ads
,0,cc_entex
);
739 int adns_init(adns_state
*ads_r
, adns_initflags flags
, FILE *diagfile
) {
740 return init_files(ads_r
, flags
, logfn_file
, diagfile ? diagfile
: stderr
);
743 static int init_strcfg(adns_state
*ads_r
, adns_initflags flags
,
744 adns_logcallbackfn
*logfn
, void *logfndata
,
745 const char *configtext
) {
749 r
= init_begin(&ads
, flags
, logfn
, logfndata
);
752 readconfigtext(ads
,configtext
,"<supplied configuration text>");
753 if (ads
->configerrno
) {
759 r
= init_finish(ads
); if (r
) return r
;
760 adns__consistency(ads
,0,cc_entex
);
765 int adns_init_strcfg(adns_state
*ads_r
, adns_initflags flags
,
766 FILE *diagfile
, const char *configtext
) {
767 return init_strcfg(ads_r
, flags
,
768 diagfile ? logfn_file
: 0, diagfile
,
772 int adns_init_logfn(adns_state
*newstate_r
, adns_initflags flags
,
773 const char *configtext
/*0=>use default config files*/,
774 adns_logcallbackfn
*logfn
/*0=>logfndata is a FILE* */,
775 void *logfndata
/*0 with logfn==0 => discard*/) {
776 if (!logfn
&& logfndata
)
779 return init_strcfg(newstate_r
, flags
, logfn
, logfndata
, configtext
);
781 return init_files(newstate_r
, flags
, logfn
, logfndata
);
784 void adns_finish(adns_state ads
) {
786 adns__consistency(ads
,0,cc_entex
);
788 if (ads
->udpw
.head
) adns__cancel(ads
->udpw
.head
);
789 else if (ads
->tcpw
.head
) adns__cancel(ads
->tcpw
.head
);
790 else if (ads
->childw
.head
) adns__cancel(ads
->childw
.head
);
791 else if (ads
->output
.head
) adns__cancel(ads
->output
.head
);
792 else if (ads
->intdone
.head
) adns__cancel(ads
->output
.head
);
795 for (i
=0; i
<ads
->nudpsockets
; i
++) close(ads
->udpsockets
[i
].fd
);
796 if (ads
->tcpsocket
>= 0) close(ads
->tcpsocket
);
797 adns__vbuf_free(&ads
->tcpsend
);
798 adns__vbuf_free(&ads
->tcprecv
);
803 void adns_forallqueries_begin(adns_state ads
) {
804 adns__consistency(ads
,0,cc_entex
);
806 ads
->udpw
.head ? ads
->udpw
.head
:
807 ads
->tcpw
.head ? ads
->tcpw
.head
:
808 ads
->childw
.head ? ads
->childw
.head
:
812 adns_query
adns_forallqueries_next(adns_state ads
, void **context_r
) {
815 adns__consistency(ads
,0,cc_entex
);
816 nqu
= ads
->forallnext
;
822 } else if (qu
== ads
->udpw
.tail
) {
824 ads
->tcpw
.head ? ads
->tcpw
.head
:
825 ads
->childw
.head ? ads
->childw
.head
:
827 } else if (qu
== ads
->tcpw
.tail
) {
829 ads
->childw
.head ? ads
->childw
.head
:
831 } else if (qu
== ads
->childw
.tail
) {
832 nqu
= ads
->output
.head
;
836 if (!qu
->parent
) break;
838 ads
->forallnext
= nqu
;
839 if (context_r
) *context_r
= qu
->ctx
.ext
;