# # doc4.awk # # Distributed with: Doc - Version 2.0 (8/22/90) # USC Information Sciences Institute # # # Accepts as input, output from dig querying for NS records of a # domain. Expects input to include TTLs and to be all lower case. # Also expect to get address of these nameservers in the Additional # section. # # Ouput a list of internet dot-notion addresses of nameservers # for domain. Only does so if domain name of server is in domain. # i.e. vax.darpa.mil. is a nameserver for isi.edu., but we are # not interested in addresses not on isi networks # # Currently, if more than one address (of some server) are on the # same network (subnets not recognized), only one is printed. # Arguably for completeness, all address should be printed. # # Intended use: targets for queries to check for presence of # in-addr.arpa mappings for domain. # BEGIN {n=0} ## Find domain being tested (will be NS record for it) $4 == "ns" { ns = $1; } ## ## Look at A records, presumably Additional answers ## for addresses of nameservers. ## $4 == "a" && ns != "" { if (index($1,ns) > 0) { ## is server name in domain ? split($5, dd, "."); if (dd[1] < 127) { ii = dd[1]; } else if (dd[1] < 192) { ii = dd[1] dd[2]; } else { ii = dd[1] dd[2] dd[3]; } # print "DDT", ii, hnet[ii], $5 if (hnet[ii] == "") { hnet[ii] = $5; # print "DDT:" , $0 print $5; } } }