[ldns-users] simple use case - change domain in query
mellery451 at gmail.com
Thu Nov 29 21:41:33 UTC 2012
Hello LDNS users,
I'm trying to use LDNS to tweak an existing DNS request. In this case, I want to modify the domain in the query. Here is the code I've tried so far (minus error checking):
/* dns_data, dns_data_len, and new_domain are inputs */
ldns_pkt *query = NULL;
ldns_rr *question = NULL;
ldns_rdf *new_name = NULL;
uint8_t *new_dns_data = NULL
size_t new_dns_data_len = 0U;
ldns_wire2pkt(&query, dns_data, dns_data_len);
question = ldns_rr_list_rr(ldns_pkt_question(query), 0U);
ldns_pkt2wire(&new_dns_data, query, &new_dns_data_len);
The code runs and doesn't produce any errors (I'm checking return codes), but the resulting buffer in new_dns_data subsequently fails in a call to ldns_wire2pkt, so I assume that means it's invalid or corrupt.
Any thoughts about what I'm doing wrong or another way to accomplish what I'd like to do (change the FQDN in the query..).
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