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Add support for EDNS ZONEVERSION to dig

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This add the +[no]zoneversion option to dig which adds the
EDNS ZONEVERSION option to requests.
This commit is contained in:
Mark Andrews 2024-06-13 07:53:59 +10:00
parent ec3cbc5468
commit 2356b75e8c
4 changed files with 31 additions and 4 deletions
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20
bin/dig/dig.c
View File

@ -328,6 +328,7 @@ help(void) {
" +[no]yaml (Present the results as " " +[no]yaml (Present the results as "
"YAML)\n" "YAML)\n"
" +[no]zflag (Set Z flag in query)\n" " +[no]zflag (Set Z flag in query)\n"
" +[no]zoneversion (Request zone version)\n"
" global d-opts and servers (before host name) affect " " global d-opts and servers (before host name) affect "
"all " "all "
"queries.\n" "queries.\n"
@ -2574,9 +2575,22 @@ plus_option(char *option, bool is_batchfile, bool *need_clone,
lookup->rrcomments = -1; lookup->rrcomments = -1;
} }
break; break;
case 'z': /* zflag */ case 'z':
FULLCHECK("zflag"); switch (cmd[1]) {
lookup->zflag = state; case 'f': /* zflag */
FULLCHECK("zflag");
lookup->zflag = state;
break;
case 'o': /* zoneversion */
FULLCHECK("zoneversion");
if (state && lookup->edns == -1) {
lookup->edns = DEFAULT_EDNS_VERSION;
}
lookup->zoneversion = state;
break;
default:
goto invalid_option;
}
break; break;
default: default:
invalid_option: invalid_option:

4
bin/dig/dig.rst
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@ -757,6 +757,10 @@ abbreviation is unambiguous; for example, :option:`+cd` is equivalent to
This option sets [or does not set] the last unassigned DNS header flag in a DNS query. This option sets [or does not set] the last unassigned DNS header flag in a DNS query.
This flag is off by default. This flag is off by default.
.. option:: +zoneversion, +nozoneversion
When enabled, this option includes an EDNS Zone Version request when sending a query.
Multiple Queries Multiple Queries
~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~

9
bin/dig/dighost.c
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@ -705,6 +705,7 @@ clone_lookup(dig_lookup_t *lookold, bool servers) {
looknew->opcode = lookold->opcode; looknew->opcode = lookold->opcode;
looknew->expire = lookold->expire; looknew->expire = lookold->expire;
looknew->nsid = lookold->nsid; looknew->nsid = lookold->nsid;
looknew->zoneversion = lookold->zoneversion;
looknew->tcp_keepalive = lookold->tcp_keepalive; looknew->tcp_keepalive = lookold->tcp_keepalive;
looknew->header_only = lookold->header_only; looknew->header_only = lookold->header_only;
looknew->https_mode = lookold->https_mode; looknew->https_mode = lookold->https_mode;
@ -2591,6 +2592,14 @@ setup_lookup(dig_lookup_t *lookup) {
i++; i++;
} }
if (lookup->zoneversion) {
INSIST(i < MAXOPTS);
opts[i].code = DNS_OPT_ZONEVERSION;
opts[i].length = 0;
opts[i].value = NULL;
i++;
}
if (lookup->ednsoptscnt != 0) { if (lookup->ednsoptscnt != 0) {
INSIST(i + lookup->ednsoptscnt <= MAXOPTS); INSIST(i + lookup->ednsoptscnt <= MAXOPTS);
memmove(&opts[i], lookup->ednsopts, memmove(&opts[i], lookup->ednsopts,

2
bin/dig/dighost.h
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@ -121,7 +121,7 @@ struct dig_lookup {
tcp_mode, tcp_mode_set, tls_mode, /*% connect using TLS */ tcp_mode, tcp_mode_set, tls_mode, /*% connect using TLS */
trace, /*% dig +trace */ trace, /*% dig +trace */
trace_root, /*% initial query for either +trace or +nssearch */ trace_root, /*% initial query for either +trace or +nssearch */
ttlunits, use_usec, waiting_connect, zflag; ttlunits, use_usec, waiting_connect, zflag, zoneversion;
char textname[MXNAME]; /*% Name we're going to be looking up */ char textname[MXNAME]; /*% Name we're going to be looking up */
char cmdline[MXNAME]; char cmdline[MXNAME];
dns_rdatatype_t rdtype; dns_rdatatype_t rdtype;