Re: DNS lookups on a different port for testing?
On Thu, Jan 23, 2020, Stuart Henderson wrote: > On 2020-01-22, Claus Assmann wrote: > > The functional tests for sendmail use ldns-testns as DNS server > > which provides specific test data and error behaviours. > > It runs on a port > 1024 to avoid requiring root access. > For the libbind port, to avoid the conflict with libc/asr, those two > symbols are renamed. You need to set cpp flags to make sure you're > getting the version of resolv.h from /usr/local/include *not* the one in > /usr/include. With these flags (CPP/LD): -I/usr/local/include/bind -L/usr/local/bind/libbind -lbind and a little bit more hacking of the code (only to call res_init() in the "right" place) this work! Thank you, now I can continue to use my OpenBSD machine for testing the DANE code in sm8. -- Address is valid for this mailing list only, please do not reply to it direcly, but to the list.
Re: DNS lookups on a different port for testing?
On 2020-01-22, Claus Assmann wrote: > The functional tests for sendmail use ldns-testns as DNS server > which provides specific test data and error behaviours. > It runs on a port > 1024 to avoid requiring root access. > There's code in sendmail to set the IP and port for a NS: > _res.nsaddr_list[0].sin_family = AF_INET; > _res.nsaddr_list[0].sin_addr = *ns; > _res.nsaddr_list[0].sin_port = htons(port); > _res.nscount = 1; > but this does not work (anymore) on OpenBSD -- AFAICT the > resolver implementation (asr?) has a hardcoded port (53). > Is there some way to set a different port for testing? I also tried > to link sendmail against libbind but then it fails during executtion: > > sendmail:/usr/lib/libc.so.95.0: ../sendmail/sendmail : WARNING: > symbol(__p_type_syms) size mismatch, relink your program > sendmail:/usr/lib/libc.so.95.0: ../sendmail/sendmail : WARNING: symbol(_res) > size mismatch, relink your program > fill_fd: before readcf: fd 0 not open: Bad file descriptor > > Any (simple?) suggestion to get this working on OpenBSD (just for > functional testing)? > For the libbind port, to avoid the conflict with libc/asr, those two symbols are renamed. You need to set cpp flags to make sure you're getting the version of resolv.h from /usr/local/include *not* the one in /usr/include.
Re: DNS lookups on a different port for testing?
Claus Assmann wrote: > The functional tests for sendmail use ldns-testns as DNS server > which provides specific test data and error behaviours. > It runs on a port > 1024 to avoid requiring root access. you can use a combination of pf.conf rdr-to and 127.0.0.2 etc. i.e., bind to port 5353, have pf rdr 127.0.0.2:53 to 5353. this requires root to setup, but not afterwards.
DNS lookups on a different port for testing?
The functional tests for sendmail use ldns-testns as DNS server which provides specific test data and error behaviours. It runs on a port > 1024 to avoid requiring root access. There's code in sendmail to set the IP and port for a NS: _res.nsaddr_list[0].sin_family = AF_INET; _res.nsaddr_list[0].sin_addr = *ns; _res.nsaddr_list[0].sin_port = htons(port); _res.nscount = 1; but this does not work (anymore) on OpenBSD -- AFAICT the resolver implementation (asr?) has a hardcoded port (53). Is there some way to set a different port for testing? I also tried to link sendmail against libbind but then it fails during executtion: sendmail:/usr/lib/libc.so.95.0: ../sendmail/sendmail : WARNING: symbol(__p_type_syms) size mismatch, relink your program sendmail:/usr/lib/libc.so.95.0: ../sendmail/sendmail : WARNING: symbol(_res) size mismatch, relink your program fill_fd: before readcf: fd 0 not open: Bad file descriptor Any (simple?) suggestion to get this working on OpenBSD (just for functional testing)? -- Address is valid for this mailing list only, please do not reply to it direcly, but to the list.
