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| author | Lennart Poettering <lennart@poettering.net> | 2015-12-29 18:58:05 +0100 |
|---|---|---|
| committer | Lennart Poettering <lennart@poettering.net> | 2015-12-29 21:42:09 +0100 |
| commit | 9a1f0c283bac56eb26a2fa02d62e0e9ece82f25a (patch) | |
| tree | 6ff67cc00e12ee85b43e5008423b31934025817a | |
| parent | eebffed767ca51977a9f53067d2a04f248c0ed1d (diff) | |
resolved: properly handle SRV RRs with the DNS root as hostname
| -rw-r--r-- | src/libsystemd/sd-bus/bus-common-errors.c | 1 | ||||
| -rw-r--r-- | src/libsystemd/sd-bus/bus-common-errors.h | 1 | ||||
| -rw-r--r-- | src/resolve/resolved-bus.c | 18 |
3 files changed, 20 insertions, 0 deletions
diff --git a/src/libsystemd/sd-bus/bus-common-errors.c b/src/libsystemd/sd-bus/bus-common-errors.c index e825cf6c4f..6e2594d001 100644 --- a/src/libsystemd/sd-bus/bus-common-errors.c +++ b/src/libsystemd/sd-bus/bus-common-errors.c @@ -74,6 +74,7 @@ BUS_ERROR_MAP_ELF_REGISTER const sd_bus_error_map bus_common_errors[] = { SD_BUS_ERROR_MAP(BUS_ERROR_CNAME_LOOP, EDEADLK), SD_BUS_ERROR_MAP(BUS_ERROR_ABORTED, ECANCELED), SD_BUS_ERROR_MAP(BUS_ERROR_CONNECTION_FAILURE, ECONNREFUSED), + SD_BUS_ERROR_MAP(BUS_ERROR_NO_SUCH_SERVICE, EUNATCH), SD_BUS_ERROR_MAP(BUS_ERROR_NO_SUCH_TRANSFER, ENXIO), SD_BUS_ERROR_MAP(BUS_ERROR_TRANSFER_IN_PROGRESS, EBUSY), diff --git a/src/libsystemd/sd-bus/bus-common-errors.h b/src/libsystemd/sd-bus/bus-common-errors.h index d7d210b0c4..9076993f01 100644 --- a/src/libsystemd/sd-bus/bus-common-errors.h +++ b/src/libsystemd/sd-bus/bus-common-errors.h @@ -73,6 +73,7 @@ #define BUS_ERROR_CNAME_LOOP "org.freedesktop.resolve1.CNameLoop" #define BUS_ERROR_ABORTED "org.freedesktop.resolve1.Aborted" #define BUS_ERROR_CONNECTION_FAILURE "org.freedesktop.resolve1.ConnectionFailure" +#define BUS_ERROR_NO_SUCH_SERVICE "org.freedesktop.resolve1.NoSuchService" #define _BUS_ERROR_DNS "org.freedesktop.resolve1.DnsError." #define BUS_ERROR_NO_SUCH_TRANSFER "org.freedesktop.import1.NoSuchTransfer" diff --git a/src/resolve/resolved-bus.c b/src/resolve/resolved-bus.c index 5c7893d01c..4d4c1ca014 100644 --- a/src/resolve/resolved-bus.c +++ b/src/resolve/resolved-bus.c @@ -976,6 +976,7 @@ static void bus_method_resolve_service_complete(DnsQuery *q) { return; if (q->answer) { + bool has_root_domain = false; DnsResourceRecord *rr; int ifindex; @@ -989,6 +990,11 @@ static void bus_method_resolve_service_complete(DnsQuery *q) { if (rr->key->type != DNS_TYPE_SRV) continue; + if (dns_name_is_root(rr->srv.name)) { + has_root_domain = true; + continue; + } + if ((q->flags & SD_RESOLVED_NO_ADDRESS) == 0) { q->block_all_complete ++; r = resolve_service_hostname(q, rr, ifindex); @@ -1000,6 +1006,18 @@ static void bus_method_resolve_service_complete(DnsQuery *q) { found++; } + + if (has_root_domain && found == 0) { + /* If there's exactly one SRV RR and it uses + * the root domain as host name, then the + * service is explicitly not offered on the + * domain. Report this as a recognizable + * error. See RFC 2782, Section "Usage + * Rules". */ + r = sd_bus_reply_method_errorf(q->request, BUS_ERROR_NO_SUCH_SERVICE, "'%s' does not provide the requested service", dns_question_first_name(q->question)); + goto finish; + } + } if (found <= 0) { |