separate parsing and packing of rdata
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Sven M. Hallberg
parent
342e39eb61
commit
83f4944321
1 changed files with 82 additions and 152 deletions
234
examples/dns.c
234
examples/dns.c
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@ -167,176 +167,106 @@ void set_rr(struct dns_rr rr, HCountedArray *rdata) {
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for (size_t i=0; i<rdata->used; ++i)
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data[i] = rdata->elements[i]->uint;
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// Mapping numeric RR types (as indices) to parsers
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const HParser *parsers[] = {
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NULL, // there is no type 0
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init_a(), // 1
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init_ns(),
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init_md(),
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init_mf(),
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init_cname(), // 5
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init_soa(),
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init_mb(),
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init_mg(),
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init_mr(),
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init_null(), // 10
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init_wks(),
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init_ptr(),
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init_hinfo(),
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init_minfo(),
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init_mx(), // 15
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init_txt()
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};
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// Parse rdata if possible.
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const HParseResult *r = NULL;
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if (rr.type < sizeof(parsers)) {
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const HParser *p = parsers[rr.type];
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if (p)
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r = h_parse(p, (const uint8_t*)data, rdata->used);
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}
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// If the RR doesn't parse, set its type to 0.
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if (!r)
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rr.type = 0;
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// Pack the parsed rdata into rr.
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switch(rr.type) {
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case 1: // A
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{
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const HParseResult *r = h_parse(init_a(), (const uint8_t*)data, rdata->used);
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if (!r)
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rr.type = 0;
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else
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rr.a = r->ast->seq->elements[0]->uint;
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break;
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}
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rr.a = r->ast->seq->elements[0]->uint;
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break;
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case 2: // NS
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{
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const HParseResult *r = h_parse(init_ns(), (const uint8_t*)data, rdata->used);
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if (!r)
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rr.type = 0;
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else
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rr.ns = get_domain(r->ast->seq->elements[0]);
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break;
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}
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rr.ns = get_domain(r->ast->seq->elements[0]);
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break;
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case 3: // MD
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{
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const HParseResult *r = h_parse(init_md(), (const uint8_t*)data, rdata->used);
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if (!r)
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rr.type = 0;
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else
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rr.md = get_domain(r->ast->seq->elements[0]);
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break;
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}
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rr.md = get_domain(r->ast->seq->elements[0]);
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break;
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case 4: // MF
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{
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const HParseResult *r = h_parse(init_mf(), (const uint8_t*)data, rdata->used);
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if (!r)
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rr.type = 0;
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else
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rr.md = get_domain(r->ast->seq->elements[0]);
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break;
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}
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rr.md = get_domain(r->ast->seq->elements[0]);
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break;
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case 5: // CNAME
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{
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const HParseResult *r = h_parse(init_cname(), (const uint8_t*)data, rdata->used);
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if (!r)
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rr.type = 0;
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else
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rr.cname = get_domain(r->ast->seq->elements[0]);
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break;
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}
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rr.cname = get_domain(r->ast->seq->elements[0]);
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break;
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case 6: // SOA
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{
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const HParseResult *r = h_parse(init_soa(), (const uint8_t*)data, rdata->used);
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if (!r)
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rr.type = 0;
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else {
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rr.soa.mname = get_domain(r->ast->seq->elements[0]);
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rr.soa.rname = get_domain(r->ast->seq->elements[1]);
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rr.soa.serial = r->ast->seq->elements[2]->uint;
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rr.soa.refresh = r->ast->seq->elements[3]->uint;
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rr.soa.retry = r->ast->seq->elements[4]->uint;
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rr.soa.expire = r->ast->seq->elements[5]->uint;
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rr.soa.minimum = r->ast->seq->elements[6]->uint;
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}
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break;
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}
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rr.soa.mname = get_domain(r->ast->seq->elements[0]);
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rr.soa.rname = get_domain(r->ast->seq->elements[1]);
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rr.soa.serial = r->ast->seq->elements[2]->uint;
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rr.soa.refresh = r->ast->seq->elements[3]->uint;
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rr.soa.retry = r->ast->seq->elements[4]->uint;
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rr.soa.expire = r->ast->seq->elements[5]->uint;
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rr.soa.minimum = r->ast->seq->elements[6]->uint;
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break;
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case 7: // MB
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{
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const HParseResult *r = h_parse(init_mb(), (const uint8_t*)data, rdata->used);
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if (!r)
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rr.type = 0;
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else
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rr.mb = get_domain(r->ast->seq->elements[0]);
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break;
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}
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rr.mb = get_domain(r->ast->seq->elements[0]);
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break;
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case 8: // MG
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{
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const HParseResult *r = h_parse(init_mg(), (const uint8_t*)data, rdata->used);
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if (!r)
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rr.type = 0;
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else
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rr.mg = get_domain(r->ast->seq->elements[0]);
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break;
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}
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rr.mg = get_domain(r->ast->seq->elements[0]);
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break;
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case 9: // MR
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{
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const HParseResult *r = h_parse(init_mr(), (const uint8_t*)data, rdata->used);
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if (!r)
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rr.type = 0;
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else
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rr.mr = get_domain(r->ast->seq->elements[0]);
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break;
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}
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rr.mr = get_domain(r->ast->seq->elements[0]);
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break;
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case 10: // NULL
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{
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const HParseResult *r = h_parse(init_null(), (const uint8_t*)data, rdata->used);
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if (!r)
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rr.type = 0;
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else {
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rr.null = h_arena_malloc(rdata->arena, sizeof(uint8_t)*r->ast->seq->used);
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for (size_t i=0; i<r->ast->seq->used; ++i)
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rr.null[i] = r->ast->seq->elements[i]->uint;
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}
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break;
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}
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rr.null = h_arena_malloc(rdata->arena, sizeof(uint8_t)*r->ast->seq->used);
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for (size_t i=0; i<r->ast->seq->used; ++i)
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rr.null[i] = r->ast->seq->elements[i]->uint;
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break;
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case 11: // WKS
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{
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const HParseResult *r = h_parse(init_wks(), (const uint8_t*)data, rdata->used);
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if (!r)
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rr.type = 0;
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else {
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rr.wks.address = r->ast->seq->elements[0]->uint;
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rr.wks.protocol = r->ast->seq->elements[1]->uint;
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rr.wks.len = r->ast->seq->elements[2]->seq->used;
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rr.wks.bit_map = h_arena_malloc(rdata->arena, sizeof(uint8_t)*r->ast->seq->elements[2]->seq->used);
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for (size_t i=0; i<rr.wks.len; ++i)
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rr.wks.bit_map[i] = r->ast->seq->elements[2]->seq->elements[i]->uint;
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}
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break;
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}
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rr.wks.address = r->ast->seq->elements[0]->uint;
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rr.wks.protocol = r->ast->seq->elements[1]->uint;
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rr.wks.len = r->ast->seq->elements[2]->seq->used;
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rr.wks.bit_map = h_arena_malloc(rdata->arena, sizeof(uint8_t)*r->ast->seq->elements[2]->seq->used);
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for (size_t i=0; i<rr.wks.len; ++i)
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rr.wks.bit_map[i] = r->ast->seq->elements[2]->seq->elements[i]->uint;
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break;
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case 12: // PTR
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{
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const HParseResult *r = h_parse(init_ptr(), (const uint8_t*)data, rdata->used);
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if (!r)
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rr.type = 0;
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else
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rr.ptr = get_domain(r->ast->seq->elements[0]);
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break;
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}
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rr.ptr = get_domain(r->ast->seq->elements[0]);
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break;
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case 13: // HINFO
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{
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const HParseResult *r = h_parse(init_hinfo(), (const uint8_t*)data, rdata->used);
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if (!r)
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rr.type = 0;
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else {
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rr.hinfo.cpu = get_cs(r->ast->seq->elements[0]->seq);
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rr.hinfo.os = get_cs(r->ast->seq->elements[1]->seq);
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}
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break;
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}
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rr.hinfo.cpu = get_cs(r->ast->seq->elements[0]->seq);
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rr.hinfo.os = get_cs(r->ast->seq->elements[1]->seq);
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break;
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case 14: // MINFO
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{
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const HParseResult *r = h_parse(init_minfo(), (const uint8_t*)data, rdata->used);
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if (!r)
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rr.type = 0;
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else {
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rr.minfo.rmailbx = get_domain(r->ast->seq->elements[0]);
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rr.minfo.emailbx = get_domain(r->ast->seq->elements[1]);
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}
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break;
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}
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rr.minfo.rmailbx = get_domain(r->ast->seq->elements[0]);
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rr.minfo.emailbx = get_domain(r->ast->seq->elements[1]);
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break;
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case 15: // MX
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{
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const HParseResult *r = h_parse(init_mx(), (const uint8_t*)data, rdata->used);
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if (!r)
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rr.type = 0;
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else {
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rr.mx.preference = r->ast->seq->elements[0]->uint;
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rr.mx.exchange = get_domain(r->ast->seq->elements[1]);
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}
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break;
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}
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rr.mx.preference = r->ast->seq->elements[0]->uint;
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rr.mx.exchange = get_domain(r->ast->seq->elements[1]);
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break;
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case 16: // TXT
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{
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const HParseResult *r = h_parse(init_txt(), (const uint8_t*)data, rdata->used);
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if (!r)
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rr.type = 0;
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else {
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rr.txt.count = r->ast->seq->elements[0]->seq->used;
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rr.txt.txt_data = get_txt(r->ast->seq->elements[0]->seq);
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}
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break;
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}
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rr.txt.count = r->ast->seq->elements[0]->seq->used;
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rr.txt.txt_data = get_txt(r->ast->seq->elements[0]->seq);
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break;
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default:
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break;
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}
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