/** print one line with udb RR */ static void print_udb_rr(uint8_t* name, udb_ptr* urr) { buffer_type buffer; region_type* region = region_create(xalloc, free); region_type* tmpregion = region_create(xalloc, free); buffer_type* tmpbuffer = buffer_create(region, MAX_RDLENGTH); rr_type rr; ssize_t c; domain_table_type* owners; owners = domain_table_create(region); rr.owner = domain_table_insert(owners, dname_make(region, name, 0)); /* to RR */ rr.type = RR(urr)->type; rr.klass = RR(urr)->klass; rr.ttl = RR(urr)->ttl; buffer_create_from(&buffer, RR(urr)->wire, RR(urr)->len); c = rdata_wireformat_to_rdata_atoms(region, owners, RR(urr)->type, RR(urr)->len, &buffer, &rr.rdatas); if(c == -1) { printf("cannot parse wireformat\n"); region_destroy(region); return; } rr.rdata_count = c; print_rr(stdout, NULL, &rr, tmpregion, tmpbuffer); region_destroy(region); region_destroy(tmpregion); }
rr_type * packet_read_rr(region_type *region, domain_table_type *owners, buffer_type *packet, int question_section) { const dname_type *owner; uint16_t rdlength; ssize_t rdata_count; rdata_atom_type *rdatas; rr_type *result = (rr_type *) region_alloc(region, sizeof(rr_type)); owner = dname_make_from_packet(region, packet, 1, 1); if (!owner || !buffer_available(packet, 2*sizeof(uint16_t))) { return NULL; } result->owner = domain_table_insert(owners, owner); result->type = buffer_read_u16(packet); result->klass = buffer_read_u16(packet); if (question_section) { result->ttl = 0; result->rdata_count = 0; result->rdatas = NULL; return result; } else if (!buffer_available(packet, sizeof(uint32_t) + sizeof(uint16_t))) { return NULL; } result->ttl = buffer_read_u32(packet); rdlength = buffer_read_u16(packet); if (!buffer_available(packet, rdlength)) { return NULL; } rdata_count = rdata_wireformat_to_rdata_atoms( region, owners, result->type, rdlength, packet, &rdatas); if (rdata_count == -1) { return NULL; } result->rdata_count = rdata_count; result->rdatas = rdatas; return result; }
void parse_unknown_rdata(uint16_t type, uint16_t *wireformat) { buffer_type packet; uint16_t size; ssize_t rdata_count; ssize_t i; rdata_atom_type *rdatas; if (wireformat) { size = *wireformat; } else { return; } buffer_create_from(&packet, wireformat + 1, *wireformat); rdata_count = rdata_wireformat_to_rdata_atoms(parser->region, parser->db->domains, type, size, &packet, &rdatas); if (rdata_count == -1) { zc_error_prev_line("bad unknown RDATA"); return; } for (i = 0; i < rdata_count; ++i) { if (rdata_atom_is_domain(type, i)) { zadd_rdata_domain(rdatas[i].domain); } else { zadd_rdata_wireformat(rdatas[i].data); } } region_recycle(parser->region, rdatas, rdata_count*sizeof(rdata_atom_type)); }
static int add_RR(namedb_type* db, const dname_type* dname, uint16_t type, uint16_t klass, uint32_t ttl, buffer_type* packet, size_t rdatalen, zone_type *zone, int is_axfr) { domain_type* domain; rrset_type* rrset; rdata_atom_type *rdatas; rr_type *rrs_old; ssize_t rdata_num; int rrnum; domain = domain_table_find(db->domains, dname); if(!domain) { /* create the domain */ domain = domain_table_insert(db->domains, dname); } rrset = domain_find_rrset(domain, zone, type); if(!rrset) { /* create the rrset */ rrset = region_alloc(db->region, sizeof(rrset_type)); if(!rrset) { log_msg(LOG_ERR, "out of memory, %s:%d", __FILE__, __LINE__); exit(1); } rrset->zone = zone; rrset->rrs = 0; rrset->rr_count = 0; domain_add_rrset(domain, rrset); } /* dnames in rdata are normalized, conform RFC 4035, * Section 6.2 */ rdata_num = rdata_wireformat_to_rdata_atoms( db->region, db->domains, type, rdatalen, packet, &rdatas); if(rdata_num == -1) { log_msg(LOG_ERR, "diff: bad rdata for %s", dname_to_string(dname,0)); return 0; } rrnum = find_rr_num(rrset, type, klass, rdatas, rdata_num); if(rrnum != -1) { DEBUG(DEBUG_XFRD, 2, (LOG_ERR, "diff: RR <%s, %s> already exists", dname_to_string(dname,0), rrtype_to_string(type))); /* ignore already existing RR: lenient accepting of messages */ return 1; } /* re-alloc the rrs and add the new */ rrs_old = rrset->rrs; rrset->rrs = region_alloc(db->region, (rrset->rr_count+1) * sizeof(rr_type)); if(!rrset->rrs) { log_msg(LOG_ERR, "out of memory, %s:%d", __FILE__, __LINE__); exit(1); } if(rrs_old) memcpy(rrset->rrs, rrs_old, rrset->rr_count * sizeof(rr_type)); region_recycle(db->region, rrs_old, sizeof(rr_type) * rrset->rr_count); rrset->rr_count ++; rrset->rrs[rrset->rr_count - 1].owner = domain; rrset->rrs[rrset->rr_count - 1].rdatas = rdatas; rrset->rrs[rrset->rr_count - 1].ttl = ttl; rrset->rrs[rrset->rr_count - 1].type = type; rrset->rrs[rrset->rr_count - 1].klass = klass; rrset->rrs[rrset->rr_count - 1].rdata_count = rdata_num; /* see if it is a SOA */ if(domain == zone->apex) { if(type == TYPE_SOA) { uint32_t soa_minimum; zone->soa_rrset = rrset; zone->updated = 1; /* BUG #103 tweaked SOA ttl value */ if(zone->soa_nx_rrset == 0) { zone->soa_nx_rrset = region_alloc(db->region, sizeof(rrset_type)); if(!zone->soa_nx_rrset) { log_msg(LOG_ERR, "out of memory, %s:%d", __FILE__, __LINE__); exit(1); } zone->soa_nx_rrset->rr_count = 1; zone->soa_nx_rrset->next = 0; zone->soa_nx_rrset->zone = zone; zone->soa_nx_rrset->rrs = region_alloc(db->region, sizeof(rr_type)); if(!zone->soa_nx_rrset->rrs) { log_msg(LOG_ERR, "out of memory, %s:%d", __FILE__, __LINE__); exit(1); } } memcpy(zone->soa_nx_rrset->rrs, rrset->rrs, sizeof(rr_type)); memcpy(&soa_minimum, rdata_atom_data(rrset->rrs->rdatas[6]), rdata_atom_size(rrset->rrs->rdatas[6])); if (rrset->rrs->ttl > ntohl(soa_minimum)) { rrset->zone->soa_nx_rrset->rrs[0].ttl = ntohl(soa_minimum); } domain->has_SOA = 1; } if(type == TYPE_NS) { zone->ns_rrset = rrset; } if(type == TYPE_RRSIG) { int i; for (i = 0; i < rrset->rr_count; ++i) { if (rr_rrsig_type_covered(&rrset->rrs[i]) == TYPE_DNSKEY) { zone->is_secure = 1; break; } } } } #ifdef NSEC3 #ifndef FULL_PREHASH if ((type == TYPE_NSEC3) && (rrset->rr_count == 1)) { /* NSEC3 RRset just added */ if (0 != namedb_add_nsec3_domain(db, domain, zone)) return 0; } if (is_axfr == 0) { struct domain *parent = domain; do { if (0 != namedb_add_nsec3_mod_domain(db, parent)) return 0; parent = parent->parent; } while (parent != zone->apex->parent); } #else (void)is_axfr; #endif /* !FULL_PREHASH */ #endif /* NSEC3 */ return 1; }
static int delete_RR(namedb_type* db, const dname_type* dname, uint16_t type, uint16_t klass, domain_type* prevdomain, buffer_type* packet, size_t rdatalen, zone_type *zone, region_type* temp_region, int is_axfr) { domain_type *domain; rrset_type *rrset; domain = domain_table_find(db->domains, dname); if(!domain) { log_msg(LOG_WARNING, "diff: domain %s does not exist", dname_to_string(dname,0)); buffer_skip(packet, rdatalen); return 1; /* not fatal error */ } rrset = domain_find_rrset(domain, zone, type); if(!rrset) { log_msg(LOG_WARNING, "diff: rrset %s does not exist", dname_to_string(dname,0)); buffer_skip(packet, rdatalen); return 1; /* not fatal error */ } else { /* find the RR in the rrset */ domain_table_type *temptable; rdata_atom_type *rdatas; ssize_t rdata_num; int rrnum; temptable = domain_table_create(temp_region); /* This will ensure that the dnames in rdata are * normalized, conform RFC 4035, section 6.2 */ rdata_num = rdata_wireformat_to_rdata_atoms( temp_region, temptable, type, rdatalen, packet, &rdatas); if(rdata_num == -1) { log_msg(LOG_ERR, "diff: bad rdata for %s", dname_to_string(dname,0)); return 0; } rrnum = find_rr_num(rrset, type, klass, rdatas, rdata_num); if(rrnum == -1) { log_msg(LOG_WARNING, "diff: RR <%s, %s> does not exist", dname_to_string(dname,0), rrtype_to_string(type)); return 1; /* not fatal error */ } #ifdef NSEC3 #ifndef FULL_PREHASH if (is_axfr == 0) { struct domain *parent = domain; do { if (0 != namedb_add_nsec3_mod_domain(db, parent)) { return 0; } parent = parent->parent; } while (parent != zone->apex->parent); } #else (void)is_axfr; #endif /* !FULL_PREHASH */ #endif /* NSEC3 */ if(rrset->rr_count == 1) { /* delete entire rrset */ domain = rrset_delete(db, domain, rrset); if (domain && domain != prevdomain && !domain->nextdiff) { /* this domain is not yet in the diff chain */ prevdomain->nextdiff = domain; } } else { /* swap out the bad RR and decrease the count */ rr_type* rrs_orig = rrset->rrs; add_rdata_to_recyclebin(db, &rrset->rrs[rrnum]); if(rrnum < rrset->rr_count-1) rrset->rrs[rrnum] = rrset->rrs[rrset->rr_count-1]; memset(&rrset->rrs[rrset->rr_count-1], 0, sizeof(rr_type)); /* realloc the rrs array one smaller */ rrset->rrs = region_alloc_init(db->region, rrs_orig, sizeof(rr_type) * (rrset->rr_count-1)); if(!rrset->rrs) { log_msg(LOG_ERR, "out of memory, %s:%d", __FILE__, __LINE__); exit(1); } region_recycle(db->region, rrs_orig, sizeof(rr_type) * rrset->rr_count); rrset->rr_count --; } } return 1; }