Merged duplicated logic into the SocketAddress class. Based
on parallel work by @mkaleppanen and @kjbracey-arm.
Also added small ipv6 parsing fix by @mikaleppanen
For performing DNS resolution explicitly through the network-socket
user API.
This interface does not require implementation changes and can rely
entirely on the dns query library in the network-socket API.
To avoid complications with unexpected IP versions, the wanted
IP version was added as an extra argument to DNS query functions
(defaults to NSAPI_IPv4).
Internal API changes:
m nsapi_dns_query
m nsapi_dns_query_multiple
Interestingly, though multiple questions can be encoded in a single
DNS packet, few, if any, nameservers respect any but the first
question. This makes support for coelescing DNS queries useless.
Internal API changes:
+ nsapi_dns_query_multiple
Note, dns_query_multiple takes a buffer of nsapi_addr_t to fill. This is
less dynamic than the linked-list method used in linux's gethostbyname,
but is easier to manage and more constrained.
Internal API changes:
dnsQuery -> nsapi_dns_query
Additionally restructured query code to emit/parse network structures
in stream form to hopefully document the underlying structure more
explicitly.
Mika Leppänen
Christopher Haster