6 * This file is part of adns, which is
7 * Copyright (C) 1997-2000,2003,2006 Ian Jackson
8 * Copyright (C) 1999-2000,2003,2006 Tony Finch
9 * Copyright (C) 1991 Massachusetts Institute of Technology
10 * (See the file INSTALL for full details.)
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 3, or (at your option)
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software Foundation.
28 void adns_checkconsistency(adns_state ads, adns_query qu) {
29 adns__consistency(ads,qu,cc_user);
32 #define DLIST_CHECK(list, nodevar, part, body) \
34 assert(! (list).head->part back); \
35 for ((nodevar)= (list).head; \
37 (nodevar)= (nodevar)->part next) { \
38 assert((nodevar)->part next \
39 ? (nodevar) == (nodevar)->part next->part back \
40 : (nodevar) == (list).tail); \
45 #define DLIST_ASSERTON(node, nodevar, list, part) \
47 for ((nodevar)= (list).head; \
48 (nodevar) != (node); \
49 (nodevar)= (nodevar)->part next) { \
54 static void checkc_query_alloc(adns_state ads, adns_query qu) {
57 DLIST_CHECK(qu->allocations, an, , {
61 static void checkc_query(adns_state ads, adns_query qu) {
64 assert(qu->udpnextserver < ads->nservers);
65 assert(!(qu->udpsent & (~0UL << ads->nservers)));
66 assert(qu->search_pos <= ads->nsearchlist);
67 if (qu->parent) DLIST_ASSERTON(qu, child, qu->parent->children, siblings.);
70 static void checkc_notcpbuf(adns_state ads) {
71 assert(!ads->tcpsend.used);
72 assert(!ads->tcprecv.used);
73 assert(!ads->tcprecv_skip);
76 static void checkc_global(adns_state ads) {
77 const struct sortlist *sl;
80 assert(ads->udpsockets >= 0);
82 for (i=0; i<ads->nsortlist; i++) {
83 sl= &ads->sortlist[i];
84 assert(adns__addr_matches(sl->base.sa.sa_family,
85 adns__sockaddr_addr(&sl->base.sa),
86 &sl->base,&sl->mask));
89 assert(ads->tcpserver >= 0 && ads->tcpserver < ads->nservers);
91 switch (ads->tcpstate) {
92 case server_connecting:
93 assert(ads->tcpsocket >= 0);
96 case server_disconnected:
98 assert(ads->tcpsocket == -1);
102 assert(ads->tcpsocket >= 0);
103 assert(ads->tcprecv_skip <= ads->tcprecv.used);
106 assert(!"ads->tcpstate value");
109 assert(ads->searchlist || !ads->nsearchlist);
112 static void checkc_queue_udpw(adns_state ads) {
115 DLIST_CHECK(ads->udpw, qu, , {
116 assert(qu->state==query_tosend);
117 assert(qu->retries <= UDPMAXRETRIES);
119 assert(!qu->children.head && !qu->children.tail);
120 checkc_query(ads,qu);
121 checkc_query_alloc(ads,qu);
125 static void checkc_queue_tcpw(adns_state ads) {
128 DLIST_CHECK(ads->tcpw, qu, , {
129 assert(qu->state==query_tcpw);
130 assert(!qu->children.head && !qu->children.tail);
131 assert(qu->retries <= ads->nservers+1);
132 checkc_query(ads,qu);
133 checkc_query_alloc(ads,qu);
137 static void checkc_queue_childw(adns_state ads) {
138 adns_query parent, child;
140 DLIST_CHECK(ads->childw, parent, , {
141 assert(parent->state == query_childw);
142 assert(parent->children.head);
143 DLIST_CHECK(parent->children, child, siblings., {
144 assert(child->parent == parent);
145 assert(child->state != query_done);
147 checkc_query(ads,parent);
148 checkc_query_alloc(ads,parent);
152 static void checkc_query_done(adns_state ads, adns_query qu) {
153 assert(qu->state == query_done);
154 assert(!qu->children.head && !qu->children.tail);
155 checkc_query(ads,qu);
158 static void checkc_queue_output(adns_state ads) {
161 DLIST_CHECK(ads->output, qu, , {
163 assert(!qu->allocations.head && !qu->allocations.tail);
164 checkc_query_done(ads,qu);
168 static void checkc_queue_intdone(adns_state ads) {
171 DLIST_CHECK(ads->intdone, qu, , {
173 assert(qu->ctx.callback);
174 checkc_query_done(ads,qu);
178 void adns__consistency(adns_state ads, adns_query qu, consistency_checks cc) {
185 if (!(ads->iflags & adns_if_checkc_entex)) return;
186 assert(!ads->intdone.head);
189 if ((ads->iflags & adns_if_checkc_freq) != adns_if_checkc_freq) return;
196 checkc_queue_udpw(ads);
197 checkc_queue_tcpw(ads);
198 checkc_queue_childw(ads);
199 checkc_queue_output(ads);
200 checkc_queue_intdone(ads);
205 DLIST_ASSERTON(qu, search, ads->udpw, );
208 DLIST_ASSERTON(qu, search, ads->tcpw, );
211 DLIST_ASSERTON(qu, search, ads->childw, );
215 DLIST_ASSERTON(qu, search, ads->intdone, );
217 DLIST_ASSERTON(qu, search, ads->output, );
220 assert(!"specific query state");