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1 | /* |
2 | * types.c |
3 | * - RR-type-specific code, and the machinery to call it |
4 | */ |
5 | /* |
6 | * This file is part of adns, which is Copyright (C) 1997, 1998 Ian Jackson |
7 | * |
8 | * This program is free software; you can redistribute it and/or modify |
9 | * it under the terms of the GNU General Public License as published by |
10 | * the Free Software Foundation; either version 2, or (at your option) |
11 | * any later version. |
12 | * |
13 | * This program is distributed in the hope that it will be useful, |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
16 | * GNU General Public License for more details. |
17 | * |
18 | * You should have received a copy of the GNU General Public License |
19 | * along with this program; if not, write to the Free Software Foundation, |
20 | * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
21 | */ |
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22 | |
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23 | #include <stdlib.h> |
24 | |
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25 | #include <arpa/inet.h> |
26 | |
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27 | #include "internal.h" |
28 | |
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29 | static adns_status pa_inaddr(adns_query qu, int serv, |
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30 | const byte *dgram, int dglen, int cbyte, int max, |
31 | void *store_r) { |
32 | struct in_addr *dr= store_r; |
33 | |
34 | if (max-cbyte != 4) return adns_s_invaliddata; |
35 | memcpy(dr,dgram+cbyte,4); |
36 | return adns_s_ok; |
37 | } |
38 | |
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39 | static adns_status cs_inaddr(vbuf *vb, const void *data) { |
40 | const struct in_addr *dp= data; |
41 | const char *ia; |
42 | |
43 | ia= inet_ntoa(*dp); assert(ia); |
44 | return adns__vbuf_appendstr(vb,ia) ? adns_s_ok : adns_s_nolocalmem; |
45 | } |
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46 | |
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47 | static adns_status pa_domain_raw(adns_query qu, int serv, |
48 | const byte *dgram, int dglen, int cbyte, int max, |
49 | void *store_r) { |
50 | char **dpp= store_r; |
51 | adns_status st; |
52 | vbuf vb; |
53 | char *dp; |
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54 | |
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55 | adns__vbuf_init(&vb); |
56 | st= adns__parse_domain(qu->ads,serv,qu,&vb,qu->flags, |
57 | dgram,dglen, &cbyte,max); |
58 | if (st) goto x_error; |
59 | |
60 | dp= adns__alloc_interim(qu,vb.used+1); |
61 | if (!dp) { st= adns_s_nolocalmem; goto x_error; } |
62 | |
63 | dp[vb.used]= 0; |
64 | memcpy(dp,vb.buf,vb.used); |
65 | |
66 | if (cbyte != max) { st= adns_s_invaliddata; goto x_error; } |
67 | |
68 | st= adns_s_ok; |
69 | *dpp= dp; |
70 | |
71 | x_error: |
72 | adns__vbuf_free(&vb); |
73 | return st; |
74 | } |
75 | |
76 | static void mf_str(adns_query qu, void *data) { |
77 | char **ddp= data; |
78 | |
79 | adns__makefinal_str(qu,ddp); |
80 | } |
81 | |
1b644113 |
82 | static int csp_qstring(vbuf *vb, const char *dp) { |
83 | unsigned char ch; |
84 | char buf[10]; |
85 | |
86 | if (!adns__vbuf_append(vb,"\"",1)) return 0; |
87 | |
88 | while ((ch= *dp++)) { |
89 | if (ch >= 32 && ch <= 126 && ch != '"' && ch != '\\') { |
90 | if (!adns__vbuf_append(vb,&ch,1)) return 0; |
91 | } else { |
92 | sprintf(buf,"\\%02x",ch); |
93 | if (!adns__vbuf_appendstr(vb,buf)) return 0; |
94 | } |
95 | } |
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96 | |
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97 | if (!adns__vbuf_append(vb,"\"",1)) return 0; |
98 | return 1; |
99 | } |
100 | |
101 | static adns_status cs_str(vbuf *vb, const void *data) { |
102 | const char *const *dpp= data; |
103 | |
104 | return csp_qstring(vb,*dpp) ? adns_s_ok : adns_s_nolocalmem; |
ffbda80c |
105 | } |
106 | |
107 | static void mf_flat(adns_query qu, void *data) { } |
108 | |
109 | #define TYPE_SF(size,func,cp,free) size, pa_##func, mf_##free, cs_##cp |
110 | #define TYPE_SN(size,func,cp) size, pa_##func, mf_flat, cs_##cp |
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111 | #define TYPESZ_M(member) (sizeof(((adns_answer*)0)->rrs.member)) |
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112 | #define TYPE_MF(memb,parse) TYPE_SF(TYPESZ_M(memb),parse,memb,memb) |
113 | #define TYPE_MN(memb,parse) TYPE_SN(TYPESZ_M(memb),parse,memb) |
114 | |
ffbda80c |
115 | #define DEEP_MEMB(memb) TYPESZ_M(memb), mf_##memb, cs_##memb |
116 | #define FLAT_MEMB(memb) TYPESZ_M(memb), mf_flat, cs_##memb |
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117 | |
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118 | /* TYPE_<ms><nf> |
119 | * ms is M specify member name |
120 | * or S specify size explicitly |
121 | * nf is F full memory management, dependent on member name or specified func |
122 | * N no memory management required |
123 | */ |
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124 | |
125 | static const typeinfo typeinfos[] = { |
126 | /* Must be in ascending order of rrtype ! */ |
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127 | /* rr type code rrt fmt mem.mgmt member parser */ |
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128 | |
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129 | { adns_r_a, "A", 0, FLAT_MEMB(inaddr), pa_inaddr }, |
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130 | { adns_r_ns_raw, "NS", "raw", DEEP_MEMB(str), pa_domain_raw }, |
131 | { adns_r_cname, "CNAME", 0, DEEP_MEMB(str), pa_domain_raw }, |
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132 | #if 0 /*fixme*/ |
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133 | { adns_r_soa_raw, "SOA", "raw", DEEP_MEMB(soa), pa_soa }, |
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134 | #endif |
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135 | { adns_r_ptr_raw, "PTR", "raw", DEEP_MEMB(str), pa_domain_raw }, |
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136 | #if 0 /*fixme*/ |
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137 | { adns_r_hinfo, "HINFO", 0, DEEP_MEMB(strpair), pa_hinfo }, |
138 | { adns_r_mx_raw, "MX", "raw", DEEP_MEMB(intstr), pa_mx_raw }, |
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139 | { adns_r_txt, "TXT", 0, DEEP_MEMB(manystr), pa_txt }, |
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140 | { adns_r_rp_raw, "RP", "raw", DEEP_MEMB(strpair), pa_rp }, |
141 | |
142 | { adns_r_ns, "NS", "+addr", DEEP_MEMB(dmaddr), pa_dmaddr }, |
143 | { adns_r_ptr, "PTR", "checked", DEEP_MEMB(str), pa_ptr }, |
144 | { adns_r_mx, "MX", "+addr", DEEP_MEMB(intdmaddr), pa_mx }, |
145 | |
146 | { adns_r_soa, "SOA", "822", DEEP_MEMB(soa), pa_soa }, |
147 | { adns_r_rp, "RP", "822", DEEP_MEMB(strpair), pa_rp }, |
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148 | #endif |
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149 | }; |
150 | |
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151 | const typeinfo *adns__findtype(adns_rrtype type) { |
152 | const typeinfo *begin, *end, *mid; |
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153 | |
154 | begin= typeinfos; end= typeinfos+(sizeof(typeinfos)/sizeof(typeinfo)); |
155 | |
156 | while (begin < end) { |
157 | mid= begin + ((end-begin)>>1); |
158 | if (mid->type == type) return mid; |
159 | if (type > mid->type) begin= mid+1; |
160 | else end= mid; |
161 | } |
162 | return 0; |
163 | } |