summaryrefslogtreecommitdiff
path: root/src/resolve
AgeCommit message (Collapse)Author
2016-02-16resolve: print a noisy warning if we show crypto keys that could not be ↵Lennart Poettering
authenticated Doing DNS retrieval on non-authenticated crypt keys is useless, hence warn loudly about it.
2016-02-16resolved: turn on DNSSEC by default, unless configured otherwiseLennart Poettering
Let's make sure DNSSEC gets more testing, by defaulting DNSSEC to "allow-downgrade" mode. Since distros should probably not ship DNSSEC enabled by default add a configure switch to disable this again. DNSSEC in "allow-downgrade" mode should mostly work without affecting user experience. There's one exception: some captive portal systems rewrite DNS in order to redirect HTTP traffic to the captive portal. If these systems implement DNS servers that are otherwise DNSSEC-capable (which in fact is pretty unlikely, but still...), then this will result in the captive portal being inaccessible. To fix this support in NetworkManager (or any other network management solution that does captive portal detection) is required, which simply turns off DNSSEC during the captive portal detection, and resets it back to the default (i.e. on) after captive portal authentication is complete.
2016-02-13resolved: extend ResolveHostname() bus call so that it can parse IP addressesLennart Poettering
If the hostname passed to ResolveHostname() is actually an IP address that is correctly formatted as string parse it as such, avoid any DNS traffic and return the data in parsed form. This is useful for clients which can simply call the bus function now without caring about the precise formatting of specified hostnames. This mimics getaddrinfo()'s behaviour with the AI_NUMERICHOST flag set. Note that this logic is only implemented for ResolveHostname(), but not for calls such as ResolveRecord(), for which only DNS domain names may be used as input. The "authenticated" flag is set for look-ups of this type, after all no untrusted network traffic is involved.
2016-02-13resolved: rename "SearchDomains" property in the Manager interface to "Domains"Lennart Poettering
Another property name fuck-up. The property contains both search and routing domains and hence should be exposed as "Domains" rather than "SearchDomains". The counterpart in the Link object was correctly named, and the SetLinkDomains() and SetDomains() setter calls too, hence let's get this right, too. (Yepp, a minor API break actually, but given that this was so far not documented, and only 3 days public let's fix this now)
2016-02-13resolved: fix definition of SD_RESOLVED_FLAGS_MAKELennart Poettering
2016-02-13resolved: fix DNSSECSupported Link object property nameLennart Poettering
By mistake the "DNSSECSupported" bus property of the Link object got named "DNSSECSupport". Internally, it's named correctly, and the counterpart on the "Manager" object got named correctly too. Technically this rename is an API break, but given that the interface is not documented or widely announced yet, and just 3 days in a published release, let's just fix this, and hope nobody notices.
2016-02-13Merge pull request #2589 from keszybz/resolve-tool-2Lennart Poettering
Better support of OPENPGPKEY, CAA, TLSA packets and tests
2016-02-12resolve: always align flags to 8th column and print CAA flagsZbigniew Jędrzejewski-Szmek
Left-over unknown flags are printed numerically. Otherwise, it wouldn't be known what bits are remaining without knowning what the known bits are. A test case is added to verify the flag printing code: ============== src/resolve/test-data/fake-caa.pkts ============== google.com. IN CAA 0 issue "symantec.com" google.com. IN CAA 128 issue "symantec.com" -- Flags: critical google.com. IN CAA 129 issue "symantec.com" -- Flags: critical 1 google.com. IN CAA 22 issue "symantec.com" -- Flags: 22
2016-02-12resolve: parse CAA recordsZbigniew Jędrzejewski-Szmek
2016-02-12Fix hashing of TLSA packetsZbigniew Jędrzejewski-Szmek
Also add example files with TLSA and SSHFP records.
2016-02-12test-dns-packet: allow running without argumentsZbigniew Jędrzejewski-Szmek
2016-02-12test-dns-packet: add framework to read and dump packetsZbigniew Jędrzejewski-Szmek
Packets are stored in a simple format: <size> <packet-wire-format> <size> <packet-wire-format> ... Packets for some example domains are dumped, to test rr code for various record types. Currently: A AAAA CAA DNSKEY LOC MX NS NSEC OPENPGPKEY SOA SPF TXT The hashing code is executed, but results are not checked. Also build other tests in src/resolve only with --enable-resolve.
2016-02-12Typo fixesMichael Biebl
2016-02-11resolved: add cleanup function to rewind packetsZbigniew Jędrzejewski-Szmek
This makes the behaviour more consistent. Before we would not rewind after some errors, but this seems to have been an unintentional omission.
2016-02-11systemd-resolve: allow easy querying of openpgp keysZbigniew Jędrzejewski-Szmek
$ systemd-resolve --openpgp zbyszek@fedoraproject.org d08ee310438ca124a6149ea5cc21b6313b390dce485576eff96f8722._openpgpkey.fedoraproject.org. IN OPENPGPKEY mQINBFBHPMsBEACeInGYJCb+7TurKfb6wGyTottCDtiSJB310i37/6ZYoeIay/5soJjlM yfMFQ9T2XNT/0LM6gTa0MpC1st9LnzYTMsT6tzRly1D1UbVI6xw0g0vE5y2Cjk3xUwAyn ...
2016-02-11Move initialize_libgcrypt to separate fileZbigniew Jędrzejewski-Szmek
It's annoying to have the exact same function in three places. It's stored in src/shared, but it's not added to the library to avoid the dependency on libgcrypt.
2016-02-11Add memcpy_safeZbigniew Jędrzejewski-Szmek
ISO/IEC 9899:1999 §7.21.1/2 says: Where an argument declared as size_t n specifies the length of the array for a function, n can have the value zero on a call to that function. Unless explicitly stated otherwise in the description of a particular function in this subclause, pointer arguments on such a call shall still have valid values, as described in 7.1.4. In base64_append_width memcpy was called as memcpy(x, NULL, 0). GCC 4.9 started making use of this and assumes This worked fine under -O0, but does something strange under -O3. This patch fixes a bug in base64_append_width(), fixes a possible bug in journal_file_append_entry_internal(), and makes use of the new function to simplify the code in other places.
2016-02-10resolved: include inttypes.h in resolved-def.h given that we use UINT64_CLennart Poettering
2016-02-10tree-wide: remove Emacs lines from all filesDaniel Mack
This should be handled fine now by .dir-locals.el, so need to carry that stuff in every file.
2016-02-07treewide: fix typos and spacingTorstein Husebø
2016-02-04resolved: correctly store interface index of RRs in cacheLennart Poettering
Fixes: #2361
2016-02-04resolved: properly turn off DNSSEC for LLMNR/mDNS scopesLennart Poettering
2016-02-04resolved: don't follow CNAMEs originating from DNS on LLMNRLennart Poettering
Fixes: #2514
2016-02-01resolve: work around clang limitationLennart Poettering
clang is apparently not smart enough to detect when a switch statement contains case statements for all possible values of the used type. Work around that. (And while we are at it, normalize indentation a bit) Fixes: #2504
2016-02-01resolved: rework what ResolveHostname() with family == AF_UNSPEC meansLennart Poettering
Previously, if a hostanem is resolved with AF_UNSPEC specified, this would be used as indication to resolve both an AF_INET and an AF_INET6 address. With this change this logic is altered: an AF_INET address is only resolved if there's actually a routable IPv4 address on the specific interface, and similar an AF_INET6 address is only resolved if there's a routable IPv6 address. With this in place, it's ensured that the returned data is actually connectable by applications. This logic mimics glibc's resolver behaviour. Note that if the client asks explicitly for AF_INET or AF_INET6 it will get what it asked for. This also simplifies the logic how it is determined whether a specific lookup shall take place on a scope. Specifically, the checks with dns_scope_good_key() are now moved out of the transaction code and into the query code, so that we don't even create a transaction object on a specific scope if we cannot execute the resolution on it anyway.
2016-02-01resolve: Silence build warning, when systemd is built without libidnTorstein Husebø
HAVE_IDN is not defined when systemd is build without it
2016-02-01resolve: fix typosTorstein Husebø
2016-01-31resolved: allow building without libgcryptMichael Olbrich
2016-01-31resolved: make dnssec_nsec_test_enclosed() staticMichael Olbrich
It's not used anywhere else.
2016-01-31resolved: reorder functionsMichael Olbrich
Preparation to make gcrypt optional.
2016-01-29resolved: log server type when switching serversZbigniew Jędrzejewski-Szmek
I'm not defining _DNS_SERVER_TYPE_MAX/INVALID as usual in the enum, because it wouldn't be used, and then gcc would complain that various enums don't test for _DNS_SERVER_TYPE_MAX. It seems better to define the macro rather than add assert_not_reached() in multiple places.
2016-01-29resolved: add macro to compare sized fieldsZbigniew Jędrzejewski-Szmek
For consistency, generic.size is renamed to generic.data_size. nsec3.next_hashed_name comparison was missing a size check.
2016-01-29resolve-host: add option to list protocolsZbigniew Jędrzejewski-Szmek
2016-01-29resolve-host: allow specifying type as TYPEnnZbigniew Jędrzejewski-Szmek
This mirrors the behaviour of host and makes the conversion to and from string symmetrical.
2016-01-29test-resolve-tables: new "test", useful to print mappingsZbigniew Jędrzejewski-Szmek
2016-01-29resolved: calculate and print tags for DNSKEY recordsZbigniew Jędrzejewski-Szmek
2016-01-28resolved: expand flags field in DNSKEY recordsZbigniew Jędrzejewski-Szmek
2016-01-28resolved: convert TLSA fields to stringZbigniew Jędrzejewski-Szmek
Example output: _443._tcp.fedoraproject.org IN TLSA 0 0 1 GUAL5bejH7czkXcAeJ0vCiRxwMnVBsDlBMBsFtfLF8A= -- Cert. usage: CA constraint -- Selector: Full Certificate -- Matching type: SHA-256
2016-01-28resolved: OPENPGPKEY recordsZbigniew Jędrzejewski-Szmek
2016-01-28resolved: TLSA recordsZbigniew Jędrzejewski-Szmek
2016-01-28resolved: add alignment to base64Zbigniew Jędrzejewski-Szmek
We try to fit the lengthy key data into available space. If the other fields take less than half of the available columns, we use align everything in the remaining columns. Otherwise, we put everything after a newline, indented with 8 spaces. This is similar to dig and other tools do. $ COLUMNS=78 ./systemd-resolve -t any . . IN SOA a.root-servers.net nstld.verisign-grs.com 2016012701 1800 900 604800 86400 . IN RRSIG SOA RSASHA256 0 86400 20160206170000 20160127160000 54549 S1uhUoBAReAFi5wH/KczVDgwLb+B9Zp57dSYj9aX4XxBhKuzccIducpg0wWXhjCRAWuzY fQ/J2anm4+C4BLUTdlytPIemd42SUffQk2WGuuukI8e67nkrNF3WFtoeXQ4OchsyO24t2 rxi682Zo9ViqmXZ+MSsjWKt1jdem4noaY= . IN NS h.root-servers.net . IN NS k.root-servers.net . IN NS e.root-servers.net . IN NS c.root-servers.net . IN NS b.root-servers.net . IN NS g.root-servers.net . IN NS d.root-servers.net . IN NS f.root-servers.net . IN NS i.root-servers.net . IN NS j.root-servers.net . IN NS m.root-servers.net . IN NS a.root-servers.net . IN NS l.root-servers.net . IN RRSIG NS RSASHA256 0 518400 20160206170000 20160127160000 54549 rxhmTVKUgs72G3VzL+1JRuD0nGLIrPM+ISfmUx0eYUH5wZD5XMu2X+8PfkAsEQT1dziPs ac+zK1YZPbNgr3yGI5H/wEbK8S7DmlvO+/I9WKTLp/Zxn3yncvnTOdjFMZxkAqHbjVOm+ BFz7RjQuvCQlEJX4PQBFphgEnkiOnmMdI= . IN NSEC aaa ( NS SOA RRSIG NSEC DNSKEY ) . IN RRSIG NSEC RSASHA256 0 86400 20160206170000 20160127160000 54549 HY49/nGkUJJP1zLmH33MIKnkNH33jQ7bsAHE9itEjvC4wfAzgq8+Oh9fjYav1R1GDeJ2Z HOu3Z2uDRif10R8RsmZbxyZXJs7eHui9KcAMot1U4uKCCooC/5GImf+oUDbvaraUCMQRU D3mUzoa0BGWfxgZEDqZ55raVFT/olEgG8= . IN DNSKEY 257 3 RSASHA256 AwEAAagAIKlVZrpC6Ia7gEzahOR+9W29euxhJhVVLOyQbSEW0 O8gcCjFFVQUTf6v58fLjwBd0YI0EzrAcQqBGCzh/RStIoO8g0 NfnfL2MTJRkxoXbfDaUeVPQuYEhg37NZWAJQ9VnMVDxP/VHL4 96M/QZxkjf5/Efucp2gaDX6RS6CXpoY68LsvPVjR0ZSwzz1ap AzvN9dlzEheX7ICJBBtuA6G3LQpzW5hOA2hzCTMjJPJ8LbqF6 dsV6DoBQzgul0sGIcGOYl7OyQdXfZ57relSQageu+ipAdTTJ2 5AsRTAoub8ONGcLmqrAmRLKBP1dfwhYB4N7knNnulqQxA+Uk1 ihz0= . IN DNSKEY 256 3 RSASHA256 AwEAAbr/RV0stAWYbmKOldjShp4AOQGOyY3ATI1NUpP4X1qBs 6lsXpc+1ABgv6zkg02IktjZrHnmD0HsElu3wqXMrT5KL1W7Sp mg0Pou9WZ8QttdTKXwrVXrASsaGI2z/pLBSnK8EdzqUrTVxY4 TEGZtxV519isM06CCMihxTn5cfFBF . IN RRSIG DNSKEY RSASHA256 0 172800 20160204235959 20160121000000 19036 XYewrVdYKRDfZptAATwT+W4zng04riExV36+z04kok09W0RmOtDlQrlrwHLlD2iN/zYpg EqGgDF5T2xlrQdNpn+PFHhypHM7NQAgLTrwmiw6mGbV0bsZN3rhFxHwW7QVUFAvo9eNVu INrjm+sArwxq3DnPkmA+3K4ikKD2iiT/jT91VYr9SHFqXXURccLjI+nmaE7m31hXcirX/ r5i3J+B4Fx4415IavSD72r7cmruocnCVjcp+ZAUKeMyW+RwigzevLz3oEcCZ4nrTpGLEj wFaVePYoP+rfdmfLfTdmkkm4APRJa2My3XOdGFlgNS1pW1pH4az5LapLE2vMO7p1aQ== -- Information acquired via protocol DNS in 14.4ms. -- Data is authenticated: no
2016-01-28resolved: emit full path to file we failed to writeZbigniew Jędrzejewski-Szmek
Otherwise it's unclear if it's /etc/resolv.conf or some other file that is meant.
2016-01-26resolve: fix compare function for EtcHostItemThomas Hindoe Paaboel Andersen
From dd0bc0f1
2016-01-26update TODOLennart Poettering
This gets rid of the private DNSSEC TODO and moves it in the main TODO dump site, as the DNSSEC implementation is pretty complete now, and the remaining bits are low-priority.
2016-01-26resolved: prorize rtnl and sd-network event sourcesLennart Poettering
Lets make sure we always take notice of network changes before answering client requests. This way, calls like SetLinkDNS() become race-free as the specified interface index is guarantee to have been processed if it exists before we make changes to it.
2016-01-26resolved: fix the rcode to SUCCESS if we find at least one matching RR in a ↵Lennart Poettering
DNS response If we encounter NXDOMAIN, but find at least one matching RR in a response, then patch it to become SUCCESS. This should clean up handling of CNAME/DNAMEs, and makes sure broken servers and those conforming to RFC 6604 are treated the same way. The new behaviour opposes the logic suggested in RFC 6604, but given that some servers don't implement it correctly, and given that in some ways the CNAME/DNAME chains will be incomplete anyway, and given that DNSSEC generally only allows us to prove the first element of a CNAME/DNAME chain, this should simplify things for us.
2016-01-26resolved: allow configuration of routing domains in Domains=Lennart Poettering
2016-01-26resolved: teach resolved the difference between "routing" and "search" domainsLennart Poettering
Following the changes to expose the "routing" and "search" domain concepts in networkd, actually make resolved use them. It will now use routing domains exclusively for making DNS routing decisions, and use search domains additionally for extending single-label names.
2016-01-26networkd: rework Domains= settingLennart Poettering
Previously, .network files only knew a vaguely defined "Domains=" concept, for which the documentation declared it was the "DNS domain" for the network connection, without specifying what that means. With this the Domains setting is reworked, so that there are now "routing" domains and "search" domains. The former are to be used by resolved to route DNS request to specific network interfaces, the latter is to be used for searching single-label hostnames with (in addition to being used for routing). Both settings are configured in the "Domains=" setting. Normal domain names listed in it are now considered search domains (for compatibility with existing setups), while those prefixed with "~" are considered routing domains only. To route all lookups to a specific interface the routing domain "." may be used, referring to the root domain. An alternative syntax for this is the "*", as was already implemented before using the "wildcard" domain concept. This commit adds proper parsers for this new logic, and exposes this via the sd-network API. This information is not used by resolved yet, this will be added in a later commit.
2016-01-25resolved: don't consider NSEC/NSEC3 RRs as "pimary" for transactionsLennart Poettering
So far, abritrary NSEC and NSEC3 RRs were implicitly consider "primary" for any transaction, meaning we'd abort the transaction immediately if we couldn't validate it. With this patch this logic is removed, and the NSEC/NSEC3 RRs will not be considered primary anymore. This has the effect that they will be dropped from the message if they don't validate, but processing continues. This is safe to do, as they are required anyway to validate positive wildcard and negative responses, and if they are missing then, then message will be considered unsigned, which hence means the outcome is effectively the same. This is benefical in case the server sends us NSEC/NSEC3 RRs that are not directly related to the lookup we did, but simply auxiliary information. Previously, if we couldn't authenticate those RRs we'd fail the entire lookup while with this change we'll simply drop the auxiliary information and proceed without it.
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-23 00:50:41 +0000