656b2da9 |
1 | /**/ |
2 | |
4353a5c4 |
3 | #include <stdlib.h> |
4 | #include <unistd.h> |
5 | #include <errno.h> |
6 | |
7 | #include <sys/time.h> |
8 | |
9 | #include "internal.h" |
656b2da9 |
10 | |
8e5b0abb |
11 | int adns__internal_submit(adns_state ads, adns_query *query_r, |
12 | adns_rrtype type, char *query_dgram, int query_len, |
13 | adns_queryflags flags, struct timeval now, |
14 | adns_status failstat, const qcontext *ctx) { |
15 | /* Submits a query (for internal use, called during external submits). |
16 | * |
17 | * The new query is returned in *query_r, or we return adns_s_nomemory. |
18 | * |
19 | * The query datagram should already have been assembled; memory for it |
20 | * is taken over by this routine whether it succeeds or fails. |
21 | * |
22 | * If failstat is nonzero then if we are successful in creating the query |
23 | * it is immediately failed with code failstat (but _submit still succeds). |
24 | * |
25 | * ctx is copied byte-for-byte into the query. |
26 | */ |
27 | adns_query qu; |
28 | adns_status stat; |
29 | int ol, id, r; |
30 | struct timeval now; |
31 | const typeinfo *typei; |
656b2da9 |
32 | adns_query qu; |
0ba0614a |
33 | |
8e5b0abb |
34 | id= ads->nextid++; |
35 | |
36 | qu= malloc(sizeof(*qu)); if (!qu) goto x_nomemory; |
37 | qu->answer= malloc(sizeof(*qu->answer)); if (!qu->answer) goto x_freequ_nomemory; |
38 | |
4353a5c4 |
39 | qu->state= query_udp; |
8e5b0abb |
40 | qu->back= qu->next= qu->parent= 0; |
4353a5c4 |
41 | LIST_INIT(qu->children); |
656b2da9 |
42 | qu->siblings.next= qu->siblings.back= 0; |
8e5b0abb |
43 | qu->allocations= 0; |
44 | qu->interim_allocd= 0; |
45 | qu->perm_used= 0; |
46 | |
47 | qu->typei= adns__findtype(type); |
48 | qu->query_dgram= query_dgram; |
49 | qu->query_dglen= query_dglen; |
50 | adns__vbuf_init(&qu->vb); |
51 | |
52 | qu->cname_dgram= 0; |
53 | qu->cname_dglen= qu->cname_begin= 0; |
54 | |
4353a5c4 |
55 | qu->id= id; |
656b2da9 |
56 | qu->flags= flags; |
656b2da9 |
57 | qu->udpretries= 0; |
4353a5c4 |
58 | qu->udpnextserver= 0; |
59 | qu->udpsent= qu->tcpfailed= 0; |
60 | timerclear(&qu->timeout); |
61 | memcpy(&qu->context,ctx,sizeof(qu->context)); |
656b2da9 |
62 | memcpy(qu->owner,owner,ol); qu->owner[ol]= 0; |
656b2da9 |
63 | |
8e5b0abb |
64 | qu->answer->status= adns_s_ok; |
65 | qu->answer->cname= 0; |
66 | qu->answer->type= type; |
67 | qu->answer->nrrs= 0; |
68 | qu->answer->rrs= 0; |
656b2da9 |
69 | |
656b2da9 |
70 | *query_r= qu; |
8e5b0abb |
71 | |
72 | if (qu->typei) { |
73 | qu->answer->rrsz= qu->rrsz; |
74 | } else { |
75 | qu->answer->rrsz= -1; |
76 | failstat= adns_s_notimplemented; |
77 | } |
78 | if (failstat) { |
79 | adns__query_fail(ads,qu,failstat); |
80 | return; |
81 | } |
82 | |
83 | adns__query_udp(ads,qu,now); |
84 | adns__autosys(ads,now); |
85 | |
656b2da9 |
86 | return 0; |
8e5b0abb |
87 | |
88 | x_freequ_nomemory: |
89 | free(qu); |
90 | x_nomemory: |
91 | free(query_dgram); |
92 | return adns_s_nomemory; |
656b2da9 |
93 | } |
94 | |
95 | int adns_submit(adns_state ads, |
96 | const char *owner, |
97 | adns_rrtype type, |
98 | adns_queryflags flags, |
99 | void *context, |
100 | adns_query *query_r) { |
4353a5c4 |
101 | qcontext ctx; |
656b2da9 |
102 | |
4353a5c4 |
103 | ctx.ext= context; |
ddfda861 |
104 | r= gettimeofday(&now,0); if (r) return errno; |
105 | |
656b2da9 |
106 | ol= strlen(owner); |
98a3f706 |
107 | if (ol<=1 || ol>DNS_MAXDOMAIN+1) |
108 | return failsubmit(ads,context,query_r,flags,id,adns_s_invaliddomain); |
4353a5c4 |
109 | if (owner[ol-1]=='.' && owner[ol-2]!='\\') { flags &= ~adns_qf_search; ol--; } |
656b2da9 |
110 | |
98a3f706 |
111 | stat= adns__mkquery(ads,owner,ol,id,typei,flags); |
112 | if (stat) return failsubmit(ads,context,query_r,flags,id,stat); |
0ba0614a |
113 | |
8e5b0abb |
114 | adns__internal_submit(ads,type,flags,now,query_r |
656b2da9 |
115 | } |
116 | |
117 | int adns_synchronous(adns_state ads, |
118 | const char *owner, |
119 | adns_rrtype type, |
120 | adns_queryflags flags, |
121 | adns_answer **answer_r) { |
122 | adns_query qu; |
123 | int r; |
124 | |
125 | r= adns_submit(ads,owner,type,flags,0,&qu); |
126 | if (r) return r; |
127 | |
128 | do { |
129 | r= adns_wait(ads,&qu,answer_r,0); |
130 | } while (r==EINTR); |
131 | if (r) adns_cancel(ads,qu); |
132 | return r; |
133 | } |
134 | |
135 | void adns_cancel(adns_state ads, adns_query query) { |
94436798 |
136 | abort(); /* fixme */ |
656b2da9 |
137 | } |
8e5b0abb |
138 | |
139 | void *adns__alloc_interim(adns_state ads, adns_query qu, size_t sz) { |
140 | allocnode *an; |
141 | |
142 | sz= MEM_ROUND(sz); |
143 | an= malloc(MEM_ROUND(MEM_ROUND(sizeof(*an)) + sz)); |
144 | if (!an) { |
145 | adns__query_fail(ads,qu,adns_s_nolocalmem); |
146 | return 0; |
147 | } |
148 | qu->permalloclen += sz; |
149 | an->next= qu->allocations; |
150 | qu->allocations= an; |
151 | return (byte*)an + MEM_ROUND(sizeof(*an)); |
152 | } |