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Merge pull request #1030 from zonque/resolve

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resolve: minor cleanups
This commit is contained in:
Tom Gundersen 2015-08-25 14:33:41 +02:00
commit 1c76020aa5
9 changed files with 117 additions and 82 deletions
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2
src/network/networkd-link.c
View File

@ -2378,7 +2378,7 @@ int link_save(Link *link) {
yes_no(link->network->wildcard_domain));
fprintf(f, "LLMNR=%s\n",
llmnr_support_to_string(link->network->llmnr));
resolve_support_to_string(link->network->llmnr));
}
if (!hashmap_isempty(link->bound_to_links)) {

2
src/network/networkd-network-gperf.gperf
View File

@ -45,7 +45,7 @@ Network.Address, config_parse_address, 0
Network.Gateway, config_parse_gateway, 0, 0
Network.Domains, config_parse_domains, 0, offsetof(Network, domains)
Network.DNS, config_parse_strv, 0, offsetof(Network, dns)
Network.LLMNR, config_parse_llmnr, 0, offsetof(Network, llmnr)
Network.LLMNR, config_parse_resolve, 0, offsetof(Network, llmnr)
Network.NTP, config_parse_strv, 0, offsetof(Network, ntp)
Network.IPForward, config_parse_address_family_boolean_with_kernel,0, offsetof(Network, ip_forward)
Network.IPMasquerade, config_parse_bool, 0, offsetof(Network, ip_masquerade)

30
src/network/networkd-network.c
View File

@ -111,7 +111,7 @@ static int network_load_one(Manager *manager, const char *filename) {
network->allow_port_to_be_root = true;
network->unicast_flood = true;
network->llmnr = LLMNR_SUPPORT_YES;
network->llmnr = RESOLVE_SUPPORT_YES;
network->link_local = ADDRESS_FAMILY_IPV6;
@ -632,15 +632,15 @@ static const char* const dhcp_client_identifier_table[_DHCP_CLIENT_ID_MAX] = {
DEFINE_PRIVATE_STRING_TABLE_LOOKUP_FROM_STRING(dhcp_client_identifier, DCHPClientIdentifier);
DEFINE_CONFIG_PARSE_ENUM(config_parse_dhcp_client_identifier, dhcp_client_identifier, DCHPClientIdentifier, "Failed to parse client identifier type");
static const char* const llmnr_support_table[_LLMNR_SUPPORT_MAX] = {
[LLMNR_SUPPORT_NO] = "no",
[LLMNR_SUPPORT_YES] = "yes",
[LLMNR_SUPPORT_RESOLVE] = "resolve",
static const char* const resolve_support_table[_RESOLVE_SUPPORT_MAX] = {
[RESOLVE_SUPPORT_NO] = "no",
[RESOLVE_SUPPORT_YES] = "yes",
[RESOLVE_SUPPORT_RESOLVE] = "resolve",
};
DEFINE_STRING_TABLE_LOOKUP(llmnr_support, LLMNRSupport);
DEFINE_STRING_TABLE_LOOKUP(resolve_support, ResolveSupport);
int config_parse_llmnr(
int config_parse_resolve(
const char* unit,
const char *filename,
unsigned line,
@ -652,32 +652,32 @@ int config_parse_llmnr(
void *data,
void *userdata) {
LLMNRSupport *llmnr = data;
ResolveSupport *resolve = data;
int k;
assert(filename);
assert(lvalue);
assert(rvalue);
assert(llmnr);
assert(resolve);
/* Our enum shall be a superset of booleans, hence first try
* to parse as boolean, and then as enum */
k = parse_boolean(rvalue);
if (k > 0)
*llmnr = LLMNR_SUPPORT_YES;
*resolve = RESOLVE_SUPPORT_YES;
else if (k == 0)
*llmnr = LLMNR_SUPPORT_NO;
*resolve = RESOLVE_SUPPORT_NO;
else {
LLMNRSupport s;
ResolveSupport s;
s = llmnr_support_from_string(rvalue);
s = resolve_support_from_string(rvalue);
if (s < 0){
log_syntax(unit, LOG_ERR, filename, line, -s, "Failed to parse LLMNR option, ignoring: %s", rvalue);
log_syntax(unit, LOG_ERR, filename, line, -s, "Failed to parse %s option, ignoring: %s", lvalue, rvalue);
return 0;
}
*llmnr = s;
*resolve = s;
}
return 0;

28
src/network/networkd.h
View File

@ -64,13 +64,13 @@ typedef enum AddressFamilyBoolean {
_ADDRESS_FAMILY_BOOLEAN_INVALID = -1,
} AddressFamilyBoolean;
typedef enum LLMNRSupport {
LLMNR_SUPPORT_NO,
LLMNR_SUPPORT_YES,
LLMNR_SUPPORT_RESOLVE,
_LLMNR_SUPPORT_MAX,
_LLMNR_SUPPORT_INVALID = -1,
} LLMNRSupport;
typedef enum ResolveSupport {
RESOLVE_SUPPORT_NO,
RESOLVE_SUPPORT_YES,
RESOLVE_SUPPORT_RESOLVE,
_RESOLVE_SUPPORT_MAX,
_RESOLVE_SUPPORT_INVALID = -1,
} ResolveSupport;
typedef enum LinkOperationalState {
LINK_OPERSTATE_OFF,
@ -178,7 +178,7 @@ struct Network {
bool wildcard_domain;
char **domains, **dns, **ntp, **bind_carrier;
LLMNRSupport llmnr;
ResolveSupport llmnr;
LIST_FIELDS(Network, networks);
};
@ -421,14 +421,14 @@ int config_parse_ipv6token(const char *unit, const char *filename, unsigned line
const char *section, unsigned section_line, const char *lvalue,
int ltype, const char *rvalue, void *data, void *userdata);
/* LLMNR support */
/* Resolve protocols support */
const char* llmnr_support_to_string(LLMNRSupport i) _const_;
LLMNRSupport llmnr_support_from_string(const char *s) _pure_;
const char* resolve_support_to_string(ResolveSupport i) _const_;
ResolveSupport resolve_support_from_string(const char *s) _pure_;
int config_parse_llmnr(const char *unit, const char *filename, unsigned line,
const char *section, unsigned section_line, const char *lvalue,
int ltype, const char *rvalue, void *data, void *userdata);
int config_parse_resolve(const char *unit, const char *filename, unsigned line,
const char *section, unsigned section_line, const char *lvalue,
int ltype, const char *rvalue, void *data, void *userdata);
/* Address Pool */

30
src/resolve/resolved-dns-cache.c
View File

@ -411,16 +411,17 @@ int dns_cache_put(
int owner_family,
const union in_addr_union *owner_address) {
unsigned i;
unsigned cache_keys, i;
int r;
assert(c);
assert(q);
/* First, delete all matching old RRs, so that we only keep
* complete by_key in place. */
for (i = 0; i < q->n_keys; i++)
dns_cache_remove(c, q->keys[i]);
if (q) {
/* First, if we were passed a question, delete all matching old RRs,
* so that we only keep complete by_key in place. */
for (i = 0; i < q->n_keys; i++)
dns_cache_remove(c, q->keys[i]);
}
if (!answer)
return 0;
@ -435,8 +436,13 @@ int dns_cache_put(
if (!IN_SET(rcode, DNS_RCODE_SUCCESS, DNS_RCODE_NXDOMAIN))
return 0;
cache_keys = answer->n_rrs;
if (q)
cache_keys += q->n_keys;
/* Make some space for our new entries */
dns_cache_make_space(c, answer->n_rrs + q->n_keys);
dns_cache_make_space(c, cache_keys);
if (timestamp <= 0)
timestamp = now(clock_boottime_or_monotonic());
@ -448,6 +454,9 @@ int dns_cache_put(
goto fail;
}
if (!q)
return 0;
/* Third, add in negative entries for all keys with no RR */
for (i = 0; i < q->n_keys; i++) {
DnsResourceRecord *soa = NULL;
@ -479,8 +488,11 @@ fail:
/* Adding all RRs failed. Let's clean up what we already
* added, just in case */
for (i = 0; i < q->n_keys; i++)
dns_cache_remove(c, q->keys[i]);
if (q) {
for (i = 0; i < q->n_keys; i++)
dns_cache_remove(c, q->keys[i]);
}
for (i = 0; i < answer->n_rrs; i++)
dns_cache_remove(c, answer->items[i].rr->key);

43
src/resolve/resolved-dns-packet.c
View File

@ -64,7 +64,7 @@ int dns_packet_new(DnsPacket **ret, DnsProtocol protocol, size_t mtu) {
int dns_packet_new_query(DnsPacket **ret, DnsProtocol protocol, size_t mtu) {
DnsPacket *p;
DnsPacketHeader *h;
int r;
int r, rd;
assert(ret);
@ -74,26 +74,27 @@ int dns_packet_new_query(DnsPacket **ret, DnsProtocol protocol, size_t mtu) {
h = DNS_PACKET_HEADER(p);
if (protocol == DNS_PROTOCOL_LLMNR)
h->flags = htobe16(DNS_PACKET_MAKE_FLAGS(0 /* qr */,
0 /* opcode */,
0 /* c */,
0 /* tc */,
0 /* t */,
0 /* ra */,
0 /* ad */,
0 /* cd */,
0 /* rcode */));
else
h->flags = htobe16(DNS_PACKET_MAKE_FLAGS(0 /* qr */,
0 /* opcode */,
0 /* aa */,
0 /* tc */,
1 /* rd (ask for recursion) */,
0 /* ra */,
0 /* ad */,
0 /* cd */,
0 /* rcode */));
switch (protocol) {
case DNS_PROTOCOL_LLMNR:
/* no recursion for link-local resolving protocols */
rd = 0;
break;
default:
/* ask for recursion */
rd = 1;
break;
}
h->flags = htobe16(DNS_PACKET_MAKE_FLAGS(0 /* qr */,
0 /* opcode */,
0 /* aa */,
0 /* tc */,
rd /* rd */,
0 /* ra */,
0 /* ad */,
0 /* cd */,
0 /* rcode */));
*ret = p;
return 0;

9
src/resolve/resolved-dns-packet.h
View File

@ -239,11 +239,16 @@ static inline uint64_t SD_RESOLVED_FLAGS_MAKE(DnsProtocol protocol, int family)
/* Converts a protocol + family into a flags field as used in queries */
if (protocol == DNS_PROTOCOL_DNS)
switch (protocol) {
case DNS_PROTOCOL_DNS:
return SD_RESOLVED_DNS;
if (protocol == DNS_PROTOCOL_LLMNR)
case DNS_PROTOCOL_LLMNR:
return family == AF_INET6 ? SD_RESOLVED_LLMNR_IPV6 : SD_RESOLVED_LLMNR_IPV4;
default:
break;
}
return 0;
}

27
src/resolve/resolved-dns-scope.c
View File

@ -166,7 +166,8 @@ int dns_scope_emit(DnsScope *s, int fd, DnsPacket *p) {
} else
mtu = manager_find_mtu(s->manager);
if (s->protocol == DNS_PROTOCOL_DNS) {
switch (s->protocol) {
case DNS_PROTOCOL_DNS:
if (DNS_PACKET_QDCOUNT(p) > 1)
return -EOPNOTSUPP;
@ -180,8 +181,9 @@ int dns_scope_emit(DnsScope *s, int fd, DnsPacket *p) {
if (r < 0)
return r;
} else if (s->protocol == DNS_PROTOCOL_LLMNR) {
break;
case DNS_PROTOCOL_LLMNR:
if (DNS_PACKET_QDCOUNT(p) > 1)
return -EOPNOTSUPP;
@ -205,8 +207,12 @@ int dns_scope_emit(DnsScope *s, int fd, DnsPacket *p) {
r = manager_send(s->manager, fd, ifindex, family, &addr, port, p);
if (r < 0)
return r;
} else
break;
default:
return -EAFNOSUPPORT;
}
return 1;
}
@ -341,27 +347,25 @@ DnsScopeMatch dns_scope_good_domain(DnsScope *s, int ifindex, uint64_t flags, co
if (dns_name_endswith(domain, *i) > 0)
return DNS_SCOPE_YES;
if (s->protocol == DNS_PROTOCOL_DNS) {
switch (s->protocol) {
case DNS_PROTOCOL_DNS:
if (dns_name_endswith(domain, "254.169.in-addr.arpa") == 0 &&
dns_name_endswith(domain, "0.8.e.f.ip6.arpa") == 0 &&
dns_name_single_label(domain) == 0)
return DNS_SCOPE_MAYBE;
return DNS_SCOPE_NO;
}
if (s->protocol == DNS_PROTOCOL_MDNS) {
case DNS_PROTOCOL_MDNS:
if ((s->family == AF_INET && dns_name_endswith(domain, "in-addr.arpa") > 0) ||
(s->family == AF_INET6 && dns_name_endswith(domain, "ip6.arpa") > 0) ||
(dns_name_endswith(domain, "local") > 0 && /* only resolve names ending in .local via mDNS */
dns_name_equal(domain, "local") == 0 && /* but not the single-label "local" name itself */
manager_is_own_hostname(s->manager, domain) <= 0)) /* never resolve the local hostname via mDNS */
return DNS_SCOPE_MAYBE;
return DNS_SCOPE_NO;
}
if (s->protocol == DNS_PROTOCOL_LLMNR) {
case DNS_PROTOCOL_LLMNR:
if ((s->family == AF_INET && dns_name_endswith(domain, "in-addr.arpa") > 0) ||
(s->family == AF_INET6 && dns_name_endswith(domain, "ip6.arpa") > 0) ||
(dns_name_single_label(domain) > 0 && /* only resolve single label names via LLMNR */
@ -370,9 +374,10 @@ DnsScopeMatch dns_scope_good_domain(DnsScope *s, int ifindex, uint64_t flags, co
return DNS_SCOPE_MAYBE;
return DNS_SCOPE_NO;
}
assert_not_reached("Unknown scope protocol");
default:
assert_not_reached("Unknown scope protocol");
}
}
int dns_scope_good_key(DnsScope *s, DnsResourceKey *key) {

28
src/resolve/resolved-dns-transaction.c
View File

@ -186,9 +186,6 @@ void dns_transaction_complete(DnsTransaction *t, DnsTransactionState state) {
assert(t);
assert(!IN_SET(state, DNS_TRANSACTION_NULL, DNS_TRANSACTION_PENDING));
if (!IN_SET(t->state, DNS_TRANSACTION_NULL, DNS_TRANSACTION_PENDING))
return;
/* Note that this call might invalidate the query. Callers
* should hence not attempt to access the query or transaction
* after calling this function. */
@ -263,10 +260,12 @@ static int dns_transaction_open_tcp(DnsTransaction *t) {
if (t->stream)
return 0;
if (t->scope->protocol == DNS_PROTOCOL_DNS)
switch (t->scope->protocol) {
case DNS_PROTOCOL_DNS:
fd = dns_scope_tcp_socket(t->scope, AF_UNSPEC, NULL, 53, &server);
else if (t->scope->protocol == DNS_PROTOCOL_LLMNR) {
break;
case DNS_PROTOCOL_LLMNR:
/* When we already received a reply to this (but it was truncated), send to its sender address */
if (t->received)
fd = dns_scope_tcp_socket(t->scope, t->received->family, &t->received->sender, t->received->sender_port, NULL);
@ -288,8 +287,12 @@ static int dns_transaction_open_tcp(DnsTransaction *t) {
fd = dns_scope_tcp_socket(t->scope, family, &address, LLMNR_PORT, NULL);
}
} else
break;
default:
return -EAFNOSUPPORT;
}
if (fd < 0)
return fd;
@ -345,7 +348,8 @@ void dns_transaction_process_reply(DnsTransaction *t, DnsPacket *p) {
* should hence not attempt to access the query or transaction
* after calling this function. */
if (t->scope->protocol == DNS_PROTOCOL_LLMNR) {
switch (t->scope->protocol) {
case DNS_PROTOCOL_LLMNR:
assert(t->scope->link);
/* For LLMNR we will not accept any packets from other
@ -364,6 +368,14 @@ void dns_transaction_process_reply(DnsTransaction *t, DnsPacket *p) {
dns_transaction_tentative(t, p);
return;
}
break;
case DNS_PROTOCOL_DNS:
break;
default:
assert_not_reached("Invalid DNS protocol.");
}
if (t->received != p) {
@ -400,7 +412,7 @@ void dns_transaction_process_reply(DnsTransaction *t, DnsPacket *p) {
break;
default:
assert_not_reached("Invalid DNS protocol.");
break;
}
if (DNS_PACKET_TC(p)) {