--- /dev/null
+-- SPDX-License-Identifier: GPL-3.0-or-later
+local function gen_huge_answer(_, req)
+ local answer = req.answer
+ ffi.C.kr_pkt_make_auth_header(answer)
+
+ answer:rcode(kres.rcode.NOERROR)
+
+ -- 64k answer
+ answer:begin(kres.section.ANSWER)
+ answer:put('\4test\0', 300, answer:qclass(), kres.type.URI,
+ '\0\0\0\0' .. string.rep('0', 65000))
+ answer:put('\4test\0', 300, answer:qclass(), kres.type.URI,
+ '\0\0\0\0' .. 'done')
+ return kres.DONE
+end
+
+local function gen_varying_ttls(_, req)
+ local qry = req:current()
+ local answer = req.answer
+ ffi.C.kr_pkt_make_auth_header(answer)
+
+ answer:rcode(kres.rcode.NOERROR)
+
+ -- varying TTLs in ANSWER section
+ answer:begin(kres.section.ANSWER)
+ answer:put(qry.sname, 1800, answer:qclass(), kres.type.AAAA,
+ '\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\1')
+ answer:put(qry.sname, 900, answer:qclass(), kres.type.A, '\127\0\0\1')
+ answer:put(qry.sname, 20000, answer:qclass(), kres.type.NS, '\2ns\4test\0')
+
+ -- shorter TTL than all other RRs
+ answer:begin(kres.section.AUTHORITY)
+ answer:put('\4test\0', 300, answer:qclass(), kres.type.SOA,
+ '\2ns\4test\0\6nobody\7invalid\0\0\0\0\1\0\0\14\16\0\0\4\176\0\9\58\128\0\0\42\48')
+ return kres.DONE
+end
+
+function parse_pkt(input, desc)
+ local wire = ffi.cast("void *", input)
+ local pkt = ffi.C.knot_pkt_new(wire, #input, nil);
+ assert(pkt, desc .. ': failed to create new packet')
+
+ local result = ffi.C.knot_pkt_parse(pkt, 0)
+ ok(result == 0, desc .. ': knot_pkt_parse works on received answer')
+ return pkt
+end
+
+local function check_ok(req, desc)
+ local headers, stream, errno = req:go(8) -- randomly chosen timeout by tkrizek
+ if errno then
+ local errmsg = stream
+ nok(errmsg, desc .. ': ' .. errmsg)
+ return
+ end
+ same(tonumber(headers:get(':status')), 200, desc .. ': status 200')
+ same(headers:get('content-type'), 'application/dns-message', desc .. ': content-type')
+ local body = assert(stream:get_body_as_string())
+ local pkt = parse_pkt(body, desc)
+ return headers, pkt
+end
+
+local function check_err(req, exp_status, desc)
+ local headers, errmsg, errno = req:go(8) -- randomly chosen timeout by tkrizek
+ if errno then
+ nok(errmsg, desc .. ': ' .. errmsg)
+ return
+ end
+ local got_status = headers:get(':status')
+ same(got_status, exp_status, desc)
+end
+
+-- check prerequisites
+local has_doh2, err = pcall(net.listen, '127.0.0.1', math.random(30000, 39999), { kind = 'doh2'})
+if not has_doh2 then
+ -- skipping doh2 tests (failure to bind may be cause by missing support during build)
+ os.exit(77)
+else
+ policy.add(policy.suffix(policy.DROP, policy.todnames({'servfail.test.'})))
+ policy.add(policy.suffix(policy.DENY, policy.todnames({'nxdomain.test.'})))
+ policy.add(policy.suffix(gen_varying_ttls, policy.todnames({'noerror.test.'})))
+
+ modules.load('http')
+ http.config({
+ tls = false,
+ }, 'doh')
+
+ local bound
+ for _ = 1,1000 do
+ bound, _err = pcall(net.listen, '127.0.0.1', math.random(30000, 39999), { kind = 'doh' })
+ if bound then
+ break
+ end
+ end
+ assert(bound, 'unable to bind a port for HTTP module (1000 attempts)')
+
+ local _, host, port, req_templ, uri_templ
+ local function start_server()
+ local request = require('http.request')
+ local server_fd = next(http.servers)
+ assert(server_fd)
+ local server = http.servers[server_fd].server
+ ok(server ~= nil, 'creates server instance')
+ _, host, port = server:localname()
+ ok(host and port, 'binds to an interface')
+ uri_templ = string.format('http://%s:%d/doh', host, port)
+ req_templ = assert(request.new_from_uri(uri_templ))
+ req_templ.headers:upsert('content-type', 'application/dns-message')
+ end
+
+
+ -- test a valid DNS query using POST
+ local function test_post_servfail()
+ local desc = 'valid POST query which ends with SERVFAIL'
+ local req = req_templ:clone()
+ req.headers:upsert(':method', 'POST')
+ req:set_body(basexx.from_base64( -- servfail.test. A
+ 'FZUBAAABAAAAAAAACHNlcnZmYWlsBHRlc3QAAAEAAQ=='))
+ local headers, pkt = check_ok(req, desc)
+ if not (headers and pkt) then
+ return
+ end
+ -- uncacheable
+ same(headers:get('cache-control'), 'max-age=0', desc .. ': TTL 0')
+ same(pkt:rcode(), kres.rcode.SERVFAIL, desc .. ': rcode matches')
+ end
+
+ local function test_post_noerror()
+ local desc = 'valid POST query which ends with NOERROR'
+ local req = req_templ:clone()
+ req.headers:upsert(':method', 'POST')
+ req:set_body(basexx.from_base64( -- noerror.test. A
+ 'vMEBAAABAAAAAAAAB25vZXJyb3IEdGVzdAAAAQAB'))
+ local headers, pkt = check_ok(req, desc)
+ if not (headers and pkt) then
+ return
+ end
+ -- HTTP TTL is minimum from all RRs in the answer
+ same(headers:get('cache-control'), 'max-age=300', desc .. ': TTL 900')
+ same(pkt:rcode(), kres.rcode.NOERROR, desc .. ': rcode matches')
+ same(pkt:ancount(), 3, desc .. ': ANSWER is present')
+ same(pkt:nscount(), 1, desc .. ': AUTHORITY is present')
+ same(pkt:arcount(), 0, desc .. ': ADDITIONAL is empty')
+ end
+
+ local function test_post_nxdomain()
+ local desc = 'valid POST query which ends with NXDOMAIN'
+ local req = req_templ:clone()
+ req.headers:upsert(':method', 'POST')
+ req:set_body(basexx.from_base64( -- nxdomain.test. A
+ 'viABAAABAAAAAAAACG54ZG9tYWluBHRlc3QAAAEAAQ=='))
+ local headers, pkt = check_ok(req, desc)
+ if not (headers and pkt) then
+ return
+ end
+ same(headers:get('cache-control'), 'max-age=10800', desc .. ': TTL 10800')
+ same(pkt:rcode(), kres.rcode.NXDOMAIN, desc .. ': rcode matches')
+ same(pkt:nscount(), 1, desc .. ': AUTHORITY is present')
+ end
+
+ -- RFC 8484 section 6 explicitly allows huge answers over HTTP
+ local function test_huge_answer()
+ policy.add(policy.suffix(gen_huge_answer, policy.todnames({'huge.test'})))
+ local desc = 'POST query for a huge answer'
+ local req = req_templ:clone()
+ req.headers:upsert(':method', 'POST')
+ req:set_body(basexx.from_base64( -- huge.test. URI, no EDNS
+ 'HHwBAAABAAAAAAAABGh1Z2UEdGVzdAABAAAB'))
+ local _, pkt = check_ok(req, desc)
+ same(pkt:rcode(), kres.rcode.NOERROR, desc .. ': rcode NOERROR')
+ same(pkt:tc(), false, desc .. ': no TC bit')
+ same(pkt:ancount(), 2, desc .. ': ANSWER contains both RRs')
+ end
+
+ -- test an invalid DNS query using POST
+ local function test_post_short_input()
+ local req = assert(req_templ:clone())
+ req.headers:upsert(':method', 'POST')
+ req:set_body(string.rep('0', 11)) -- 11 bytes < DNS msg header
+ check_err(req, '400', 'too short POST finishes with 400')
+ end
+
+ local function test_post_long_input()
+ local req = assert(req_templ:clone())
+ req.headers:upsert(':method', 'POST')
+ req:set_body(string.rep('s', 1025)) -- > DNS msg over UDP
+ check_err(req, '413', 'too long POST finishes with 413')
+ end
+
+ local function test_post_unparseable_input()
+ local req = assert(req_templ:clone())
+ req.headers:upsert(':method', 'POST')
+ req:set_body(string.rep('\0', 1024)) -- garbage
+ check_err(req, '400', 'unparseable DNS message finishes with 400')
+ end
+
+ local function test_post_unsupp_type()
+ local req = assert(req_templ:clone())
+ req.headers:upsert(':method', 'POST')
+ req.headers:upsert('content-type', 'application/dns+json')
+ req:set_body(string.rep('\0', 12)) -- valid message
+ check_err(req, '415', 'unsupported request content type finishes with 415')
+ end
+
+ -- test a valid DNS query using GET
+ local function test_get_servfail()
+ local desc = 'valid GET query which ends with SERVFAIL'
+ local req = req_templ:clone()
+ req.headers:upsert(':method', 'GET')
+ req.headers:upsert(':path', '/doh?dns=' -- servfail.test. A
+ .. 'FZUBAAABAAAAAAAACHNlcnZmYWlsBHRlc3QAAAEAAQ')
+ local headers, pkt = check_ok(req, desc)
+ if not (headers and pkt) then
+ return
+ end
+ -- uncacheable
+ same(headers:get('cache-control'), 'max-age=0', desc .. ': TTL 0')
+ same(pkt:rcode(), kres.rcode.SERVFAIL, desc .. ': rcode matches')
+ end
+
+ local function test_get_noerror()
+ local desc = 'valid GET query which ends with NOERROR'
+ local req = req_templ:clone()
+ req.headers:upsert(':method', 'GET')
+ req.headers:upsert(':path', '/doh?dns=' -- noerror.test. A
+ .. 'vMEBAAABAAAAAAAAB25vZXJyb3IEdGVzdAAAAQAB')
+ local headers, pkt = check_ok(req, desc)
+ if not (headers and pkt) then
+ return
+ end
+ -- HTTP TTL is minimum from all RRs in the answer
+ same(headers:get('cache-control'), 'max-age=300', desc .. ': TTL 900')
+ same(pkt:rcode(), kres.rcode.NOERROR, desc .. ': rcode matches')
+ same(pkt:ancount(), 3, desc .. ': ANSWER is present')
+ same(pkt:nscount(), 1, desc .. ': AUTHORITY is present')
+ same(pkt:arcount(), 0, desc .. ': ADDITIONAL is empty')
+ end
+
+ local function test_get_nxdomain()
+ local desc = 'valid GET query which ends with NXDOMAIN'
+ local req = req_templ:clone()
+ req.headers:upsert(':method', 'GET')
+ req.headers:upsert(':path', '/doh?dns=' -- nxdomain.test. A
+ .. 'viABAAABAAAAAAAACG54ZG9tYWluBHRlc3QAAAEAAQ')
+ local headers, pkt = check_ok(req, desc)
+ if not (headers and pkt) then
+ return
+ end
+ same(headers:get('cache-control'), 'max-age=10800', desc .. ': TTL 10800')
+ same(pkt:rcode(), kres.rcode.NXDOMAIN, desc .. ': rcode matches')
+ same(pkt:nscount(), 1, desc .. ': AUTHORITY is present')
+ end
+
+ local function test_get_other_params_before_dns()
+ local desc = 'GET query with other parameters before dns is valid'
+ local req = req_templ:clone()
+ req.headers:upsert(':method', 'GET')
+ req.headers:upsert(':path',
+ '/doh?other=something&another=something&dns=vMEBAAABAAAAAAAAB25vZXJyb3IEdGVzdAAAAQAB')
+ check_ok(req, desc)
+ end
+
+ local function test_get_other_params_after_dns()
+ local desc = 'GET query with other parameters after dns is valid'
+ local req = req_templ:clone()
+ req.headers:upsert(':method', 'GET')
+ req.headers:upsert(':path',
+ '/doh?dns=vMEBAAABAAAAAAAAB25vZXJyb3IEdGVzdAAAAQAB&other=something&another=something')
+ check_ok(req, desc)
+ end
+
+ local function test_get_other_params()
+ local desc = 'GET query with other parameters than dns on both sides is valid'
+ local req = req_templ:clone()
+ req.headers:upsert(':method', 'GET')
+ req.headers:upsert(':path',
+ '/doh?other=something&dns=vMEBAAABAAAAAAAAB25vZXJyb3IEdGVzdAAAAQAB&another=something')
+ check_ok(req, desc)
+ end
+
+ -- test an invalid DNS query using GET
+ local function test_get_long_input()
+ local req = assert(req_templ:clone())
+ req.headers:upsert(':method', 'GET')
+ req.headers:upsert(':path', '/doh?dns=' .. basexx.to_url64(string.rep('\0', 1030)))
+ check_err(req, '414', 'too long GET finishes with 414')
+ end
+
+ local function test_get_no_dns_param()
+ local req = assert(req_templ:clone())
+ req.headers:upsert(':method', 'GET')
+ req.headers:upsert(':path', '/doh?notdns=' .. basexx.to_url64(string.rep('\0', 1024)))
+ check_err(req, '400', 'GET without dns paramter finishes with 400')
+ end
+
+ local function test_get_unparseable()
+ local req = assert(req_templ:clone())
+ req.headers:upsert(':method', 'GET')
+ req.headers:upsert(':path', '/doh??dns=' .. basexx.to_url64(string.rep('\0', 1024)))
+ check_err(req, '400', 'unparseable GET finishes with 400')
+ end
+
+ local function test_get_invalid_b64()
+ local req = assert(req_templ:clone())
+ req.headers:upsert(':method', 'GET')
+ req.headers:upsert(':path', '/doh?dns=thisisnotb64')
+ check_err(req, '400', 'GET with invalid base64 finishes with 400')
+ end
+
+ local function test_get_invalid_chars()
+ local req = assert(req_templ:clone())
+ req.headers:upsert(':method', 'GET')
+ req.headers:upsert(':path', '/doh?dns=' .. basexx.to_url64(string.rep('\0', 200)) .. '@#$%?!')
+ check_err(req, '400', 'GET with invalid characters in b64 finishes with 400')
+ end
+
+ local function test_unsupp_method()
+ local req = assert(req_templ:clone())
+ req.headers:upsert(':method', 'PUT')
+ check_err(req, '405', 'unsupported method finishes with 405')
+ end
+
+ local function test_dstaddr()
+ local triggered = false
+ local exp_dstaddr = ffi.gc(ffi.C.kr_straddr_socket(host, port, nil), ffi.C.free)
+ local function check_dstaddr(state, req)
+ triggered = true
+ same(ffi.C.kr_sockaddr_cmp(req.qsource.dst_addr, exp_dstaddr), 0,
+ 'request has correct server address')
+ return state
+ end
+ policy.add(policy.suffix(check_dstaddr, policy.todnames({'dstaddr.test'})))
+ local desc = 'valid POST query has server address available in request'
+ local req = req_templ:clone()
+ req.headers:upsert(':method', 'POST')
+ req:set_body(basexx.from_base64( -- dstaddr.test. A
+ 'FnkBAAABAAAAAAAAB2RzdGFkZHIEdGVzdAAAAQAB'))
+ check_ok(req, desc)
+ ok(triggered, 'dstaddr policy was triggered')
+ end
+
+ local function test_srcaddr()
+ modules.load('view')
+ assert(view)
+ local policy_refuse = policy.suffix(policy.REFUSE, policy.todnames({'srcaddr.test.knot-resolver.cz'}))
+ -- these netmasks would not work if the request did not contain IP addresses
+ view:addr('0.0.0.0/0', policy_refuse)
+ view:addr('::/0', policy_refuse)
+
+ local desc = 'valid POST query has source address available in request'
+ local req = req_templ:clone()
+ req.headers:upsert(':method', 'POST')
+ req:set_body(basexx.from_base64( -- srcaddr.test.knot-resolver.cz TXT
+ 'QNQBAAABAAAAAAAAB3NyY2FkZHIEdGVzdA1rbm90LXJlc29sdmVyAmN6AAAQAAE'))
+ local _, pkt = check_ok(req, desc)
+ same(pkt:rcode(), kres.rcode.REFUSED, desc .. ': view module caught it')
+
+ modules.unload('view')
+ end
+
+-- not implemented
+-- local function test_post_unsupp_accept()
+-- local req = assert(req_templ:clone())
+-- req.headers:upsert(':method', 'POST')
+-- req.headers:upsert('accept', 'application/dns+json')
+-- req:set_body(string.rep('\0', 12)) -- valid message
+-- check_err(req, '406', 'unsupported Accept type finishes with 406')
+-- end
+
+ -- plan tests
+ local tests = {
+ start_server,
+ test_post_servfail,
+ test_post_noerror,
+ test_post_nxdomain,
+ test_huge_answer,
+ test_post_short_input,
+ test_post_long_input,
+ test_post_unparseable_input,
+ test_post_unsupp_type,
+ test_get_servfail,
+ test_get_noerror,
+ test_get_nxdomain,
+ test_get_other_params_before_dns,
+ test_get_other_params_after_dns,
+ test_get_other_params,
+ test_get_long_input,
+ test_get_no_dns_param,
+ test_get_unparseable,
+ test_get_invalid_b64,
+ test_get_invalid_chars,
+ test_unsupp_method,
+ test_dstaddr,
+ test_srcaddr
+ }
+
+ return tests
+end
projects / thirdparty / knot-resolver.git / commitdiff
