e576be50 |
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 | */ |
98a3f706 |
22 | |
1b644113 |
23 | #include <stdlib.h> |
24 | |
86e7b8d9 |
25 | #include <arpa/inet.h> |
26 | |
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27 | #include "internal.h" |
28 | |
86e7b8d9 |
29 | static adns_status pa_inaddr(adns_query qu, int serv, |
e7a9ca47 |
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 | |
86e7b8d9 |
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 | } |
e7a9ca47 |
46 | |
ffbda80c |
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; |
86e7b8d9 |
54 | |
ffbda80c |
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 | |
1b644113 |
76 | static adns_status pa_txt(adns_query qu, int serv, |
77 | const byte *dgram, int dglen, int cbyte, int max, |
78 | void *store_r) { |
79 | vbuf vb; |
80 | |
81 | adns__vbuf_init(&vb); |
82 | |
83 | while (dg |
84 | char *bp; |
85 | |
86 | max-= cbyte; |
87 | dgram+= cbyte; |
88 | |
89 | bp= adns__alloc_interim(qu,max+1); if (!bp) return adns_s_nolocalmem; |
90 | bp[max]= 0; |
91 | memcpy(bp,dgram,max); |
92 | *(char**)store_r= bp; |
93 | return adns_s_ok; |
94 | } |
95 | |
ffbda80c |
96 | static void mf_str(adns_query qu, void *data) { |
97 | char **ddp= data; |
98 | |
99 | adns__makefinal_str(qu,ddp); |
100 | } |
101 | |
1b644113 |
102 | static int csp_qstring(vbuf *vb, const char *dp) { |
103 | unsigned char ch; |
104 | char buf[10]; |
105 | |
106 | if (!adns__vbuf_append(vb,"\"",1)) return 0; |
107 | |
108 | while ((ch= *dp++)) { |
109 | if (ch >= 32 && ch <= 126 && ch != '"' && ch != '\\') { |
110 | if (!adns__vbuf_append(vb,&ch,1)) return 0; |
111 | } else { |
112 | sprintf(buf,"\\%02x",ch); |
113 | if (!adns__vbuf_appendstr(vb,buf)) return 0; |
114 | } |
115 | } |
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116 | |
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117 | if (!adns__vbuf_append(vb,"\"",1)) return 0; |
118 | return 1; |
119 | } |
120 | |
121 | static adns_status cs_str(vbuf *vb, const void *data) { |
122 | const char *const *dpp= data; |
123 | |
124 | return csp_qstring(vb,*dpp) ? adns_s_ok : adns_s_nolocalmem; |
ffbda80c |
125 | } |
126 | |
127 | static void mf_flat(adns_query qu, void *data) { } |
128 | |
129 | #define TYPE_SF(size,func,cp,free) size, pa_##func, mf_##free, cs_##cp |
130 | #define TYPE_SN(size,func,cp) size, pa_##func, mf_flat, cs_##cp |
e7a9ca47 |
131 | #define TYPESZ_M(member) (sizeof(((adns_answer*)0)->rrs.member)) |
86e7b8d9 |
132 | #define TYPE_MF(memb,parse) TYPE_SF(TYPESZ_M(memb),parse,memb,memb) |
133 | #define TYPE_MN(memb,parse) TYPE_SN(TYPESZ_M(memb),parse,memb) |
134 | |
ffbda80c |
135 | #define DEEP_MEMB(memb) TYPESZ_M(memb), mf_##memb, cs_##memb |
136 | #define FLAT_MEMB(memb) TYPESZ_M(memb), mf_flat, cs_##memb |
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137 | |
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138 | /* TYPE_<ms><nf> |
139 | * ms is M specify member name |
140 | * or S specify size explicitly |
141 | * nf is F full memory management, dependent on member name or specified func |
142 | * N no memory management required |
143 | */ |
98a3f706 |
144 | |
145 | static const typeinfo typeinfos[] = { |
146 | /* Must be in ascending order of rrtype ! */ |
86e7b8d9 |
147 | /* rr type code rrt fmt mem.mgmt member parser */ |
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148 | |
86e7b8d9 |
149 | { adns_r_a, "A", 0, FLAT_MEMB(inaddr), pa_inaddr }, |
86e7b8d9 |
150 | { adns_r_ns_raw, "NS", "raw", DEEP_MEMB(str), pa_domain_raw }, |
151 | { adns_r_cname, "CNAME", 0, DEEP_MEMB(str), pa_domain_raw }, |
ffbda80c |
152 | #if 0 /*fixme*/ |
86e7b8d9 |
153 | { adns_r_soa_raw, "SOA", "raw", DEEP_MEMB(soa), pa_soa }, |
ffbda80c |
154 | #endif |
86e7b8d9 |
155 | { adns_r_ptr_raw, "PTR", "raw", DEEP_MEMB(str), pa_domain_raw }, |
ffbda80c |
156 | #if 0 /*fixme*/ |
86e7b8d9 |
157 | { adns_r_hinfo, "HINFO", 0, DEEP_MEMB(strpair), pa_hinfo }, |
158 | { adns_r_mx_raw, "MX", "raw", DEEP_MEMB(intstr), pa_mx_raw }, |
1b644113 |
159 | #endif |
86e7b8d9 |
160 | { adns_r_txt, "TXT", 0, DEEP_MEMB(str), pa_txt }, |
1b644113 |
161 | #if 0 /*fixme*/ |
86e7b8d9 |
162 | { adns_r_rp_raw, "RP", "raw", DEEP_MEMB(strpair), pa_rp }, |
163 | |
164 | { adns_r_ns, "NS", "+addr", DEEP_MEMB(dmaddr), pa_dmaddr }, |
165 | { adns_r_ptr, "PTR", "checked", DEEP_MEMB(str), pa_ptr }, |
166 | { adns_r_mx, "MX", "+addr", DEEP_MEMB(intdmaddr), pa_mx }, |
167 | |
168 | { adns_r_soa, "SOA", "822", DEEP_MEMB(soa), pa_soa }, |
169 | { adns_r_rp, "RP", "822", DEEP_MEMB(strpair), pa_rp }, |
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170 | #endif |
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171 | }; |
172 | |
f759e52e |
173 | const typeinfo *adns__findtype(adns_rrtype type) { |
174 | const typeinfo *begin, *end, *mid; |
98a3f706 |
175 | |
176 | begin= typeinfos; end= typeinfos+(sizeof(typeinfos)/sizeof(typeinfo)); |
177 | |
178 | while (begin < end) { |
179 | mid= begin + ((end-begin)>>1); |
180 | if (mid->type == type) return mid; |
181 | if (type > mid->type) begin= mid+1; |
182 | else end= mid; |
183 | } |
184 | return 0; |
185 | } |