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1 | /**/ |
2 | |
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3 | #include <stdlib.h> |
4 | #include <unistd.h> |
5 | #include <errno.h> |
6 | |
7 | #include <sys/time.h> |
8 | |
9 | #include "internal.h" |
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10 | |
11 | static adns_query allocquery(adns_state ads, const char *owner, int ol, |
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12 | int id, const typeinfo *typei, |
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13 | adns_queryflags flags, const qcontext *ctx) { |
14 | /* Query message used is the one assembled in ads->rqbuf */ |
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15 | adns_query qu; |
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16 | adns_answer *ans; |
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17 | |
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18 | qu= malloc(sizeof(*qu)+ol+1+ads->rqbuf.used); if (!qu) return 0; |
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19 | |
20 | adns__vbuf_init(&qu->ans); |
21 | if (!adns__vbuf_ensure(&qu->ans,sizeof(adns_answer))) { free(qu); return 0; } |
22 | ans= (adns_answer*)qu->ans.buf; |
23 | ans->status= adns_s_ok; |
24 | ans->type= qu->typei->type; |
25 | ans->nrrs= 0; |
26 | ans->rrs.str= 0; |
27 | |
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28 | qu->state= query_udp; |
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29 | qu->next= qu->back= qu->parent= 0; |
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30 | LIST_INIT(qu->children); |
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31 | qu->siblings.next= qu->siblings.back= 0; |
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32 | qu->typei= typei; |
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33 | qu->id= id; |
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34 | qu->flags= flags; |
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35 | qu->udpretries= 0; |
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36 | qu->udpnextserver= 0; |
37 | qu->udpsent= qu->tcpfailed= 0; |
38 | timerclear(&qu->timeout); |
39 | memcpy(&qu->context,ctx,sizeof(qu->context)); |
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40 | memcpy(qu->owner,owner,ol); qu->owner[ol]= 0; |
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41 | qu->querymsg= qu->owner+ol+1; |
42 | memcpy(qu->owner+ol+1,ads->rqbuf.buf,ads->rqbuf.used); |
43 | qu->querylen= ads->rqbuf.used; |
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44 | |
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45 | return qu; |
46 | } |
47 | |
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48 | static int failsubmit(adns_state ads, const qcontext *ctx, adns_query *query_r, |
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49 | adns_queryflags flags, int id, adns_status stat) { |
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50 | adns_query qu; |
51 | |
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52 | ads->rqbuf.used= 0; |
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53 | qu= allocquery(ads,0,0,id,0,flags,ctx); if (!qu) return errno; |
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54 | adns__query_fail(ads,qu,stat); |
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55 | *query_r= qu; |
56 | return 0; |
57 | } |
58 | |
59 | int adns_submit(adns_state ads, |
60 | const char *owner, |
61 | adns_rrtype type, |
62 | adns_queryflags flags, |
63 | void *context, |
64 | adns_query *query_r) { |
65 | adns_query qu; |
66 | adns_status stat; |
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67 | int ol, id, r; |
68 | qcontext ctx; |
69 | struct timeval now; |
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70 | const typeinfo *typei; |
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71 | |
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72 | ctx.ext= context; |
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73 | id= ads->nextid++; |
74 | |
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75 | r= gettimeofday(&now,0); if (r) return errno; |
76 | |
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77 | typei= adns__findtype(type); |
78 | if (!typei) return failsubmit(ads,context,query_r,flags,id,adns_s_notimplemented); |
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79 | |
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80 | ol= strlen(owner); |
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81 | if (ol<=1 || ol>DNS_MAXDOMAIN+1) |
82 | return failsubmit(ads,context,query_r,flags,id,adns_s_invaliddomain); |
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83 | if (owner[ol-1]=='.' && owner[ol-2]!='\\') { flags &= ~adns_qf_search; ol--; } |
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84 | |
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85 | stat= adns__mkquery(ads,owner,ol,id,typei,flags); |
86 | if (stat) return failsubmit(ads,context,query_r,flags,id,stat); |
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87 | |
88 | qu= allocquery(ads,owner,ol,id,typei,flags,&ctx); if (!qu) return errno; |
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89 | adns__query_udp(ads,qu,now); |
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90 | adns__autosys(ads,now); |
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91 | |
92 | *query_r= qu; |
93 | return 0; |
94 | } |
95 | |
96 | int adns_synchronous(adns_state ads, |
97 | const char *owner, |
98 | adns_rrtype type, |
99 | adns_queryflags flags, |
100 | adns_answer **answer_r) { |
101 | adns_query qu; |
102 | int r; |
103 | |
104 | r= adns_submit(ads,owner,type,flags,0,&qu); |
105 | if (r) return r; |
106 | |
107 | do { |
108 | r= adns_wait(ads,&qu,answer_r,0); |
109 | } while (r==EINTR); |
110 | if (r) adns_cancel(ads,qu); |
111 | return r; |
112 | } |
113 | |
114 | void adns_cancel(adns_state ads, adns_query query) { |
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115 | abort(); /* fixme */ |
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116 | } |