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resolved: allow passing on which protocol, family and interface to look something up

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Also, return on which protocol/family/interface we found something.
This commit is contained in:
Lennart Poettering
2014-08-14 01:00:15 +02:00
parent 12e34d9d58
commit 51323288fc
10 changed files with 284 additions and 103 deletions
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1
Makefile.am
View File

@@ -4781,6 +4781,7 @@ systemd_resolved_SOURCES = \
src/resolve/resolved-bus.h \
src/resolve/resolved-link.h \
src/resolve/resolved-link.c \
src/resolve/resolved-def.h \
src/resolve/resolved-dns-domain.h \
src/resolve/resolved-dns-domain.c \
src/resolve/resolved-dns-rr.h \

78
src/nss-resolve/nss-resolve.c
View File

@@ -66,23 +66,27 @@ static bool bus_error_shall_fallback(sd_bus_error *e) {
}
static int count_addresses(sd_bus_message *m, int af, const char **canonical) {
int c = 0, r;
int c = 0, r, ifindex;
assert(m);
assert(canonical);
r = sd_bus_message_enter_container(m, 'a', "(iayi)");
r = sd_bus_message_read(m, "i", &ifindex);
if (r < 0)
return r;
while ((r = sd_bus_message_enter_container(m, 'r', "iayi")) > 0) {
r = sd_bus_message_enter_container(m, 'a', "(iay)");
if (r < 0)
return r;
while ((r = sd_bus_message_enter_container(m, 'r', "iay")) > 0) {
int family;
r = sd_bus_message_read(m, "i", &family);
if (r < 0)
return r;
r = sd_bus_message_skip(m, "ayi");
r = sd_bus_message_skip(m, "ay");
if (r < 0)
return r;
@@ -127,7 +131,7 @@ enum nss_status _nss_resolve_gethostbyname4_r(
const char *canonical = NULL;
size_t l, ms, idx;
char *r_name;
int c, r, i = 0;
int c, r, i = 0, ifindex;
assert(name);
assert(pat);
@@ -153,7 +157,7 @@ enum nss_status _nss_resolve_gethostbyname4_r(
if (r < 0)
goto fail;
r = sd_bus_message_append(req, "si", name, AF_UNSPEC);
r = sd_bus_message_append(req, "isit", 0, name, AF_UNSPEC, (uint64_t) 0);
if (r < 0)
goto fail;
@@ -219,12 +223,21 @@ enum nss_status _nss_resolve_gethostbyname4_r(
/* Second, append addresses */
r_tuple_first = (struct gaih_addrtuple*) (buffer + idx);
r = sd_bus_message_enter_container(reply, 'a', "(iayi)");
r = sd_bus_message_read(reply, "i", &ifindex);
if (r < 0)
goto fail;
while ((r = sd_bus_message_enter_container(reply, 'r', "iayi")) > 0) {
int family, ifindex;
if (ifindex < 0) {
r = -EINVAL;
goto fail;
}
r = sd_bus_message_enter_container(reply, 'a', "(iay)");
if (r < 0)
goto fail;
while ((r = sd_bus_message_enter_container(reply, 'r', "iay")) > 0) {
int family;
const void *a;
size_t sz;
@@ -236,10 +249,6 @@ enum nss_status _nss_resolve_gethostbyname4_r(
if (r < 0)
goto fail;
r = sd_bus_message_read(reply, "i", &ifindex);
if (r < 0)
goto fail;
r = sd_bus_message_exit_container(reply);
if (r < 0)
goto fail;
@@ -252,11 +261,6 @@ enum nss_status _nss_resolve_gethostbyname4_r(
goto fail;
}
if (ifindex < 0) {
r = -EINVAL;
goto fail;
}
r_tuple = (struct gaih_addrtuple*) (buffer + idx);
r_tuple->next = i == c-1 ? NULL : (struct gaih_addrtuple*) ((char*) r_tuple + ALIGN(sizeof(struct gaih_addrtuple)));
r_tuple->name = r_name;
@@ -309,7 +313,7 @@ enum nss_status _nss_resolve_gethostbyname3_r(
_cleanup_bus_close_unref_ sd_bus *bus = NULL;
size_t l, idx, ms, alen;
const char *canonical;
int c, r, i = 0;
int c, r, i = 0, ifindex;
assert(name);
assert(result);
@@ -343,7 +347,7 @@ enum nss_status _nss_resolve_gethostbyname3_r(
if (r < 0)
goto fail;
r = sd_bus_message_append(req, "si", name, af);
r = sd_bus_message_append(req, "isit", 0, name, af, (uint64_t) 0);
if (r < 0)
goto fail;
@@ -424,12 +428,21 @@ enum nss_status _nss_resolve_gethostbyname3_r(
/* Third, append addresses */
r_addr = buffer + idx;
r = sd_bus_message_enter_container(reply, 'a', "(iayi)");
r = sd_bus_message_read(reply, "i", &ifindex);
if (r < 0)
goto fail;
while ((r = sd_bus_message_enter_container(reply, 'r', "iayi")) > 0) {
int family, ifindex;
if (ifindex < 0) {
r = -EINVAL;
goto fail;
}
r = sd_bus_message_enter_container(reply, 'a', "(iay)");
if (r < 0)
goto fail;
while ((r = sd_bus_message_enter_container(reply, 'r', "iay")) > 0) {
int family;
const void *a;
size_t sz;
@@ -441,10 +454,6 @@ enum nss_status _nss_resolve_gethostbyname3_r(
if (r < 0)
goto fail;
r = sd_bus_message_read(reply, "i", &ifindex);
if (r < 0)
goto fail;
r = sd_bus_message_exit_container(reply);
if (r < 0)
goto fail;
@@ -521,7 +530,7 @@ enum nss_status _nss_resolve_gethostbyaddr2_r(
unsigned c = 0, i = 0;
size_t ms = 0, idx;
const char *n;
int r;
int r, ifindex;
assert(addr);
assert(result);
@@ -559,7 +568,7 @@ enum nss_status _nss_resolve_gethostbyaddr2_r(
if (r < 0)
goto fail;
r = sd_bus_message_append(req, "i", af);
r = sd_bus_message_append(req, "ii", 0, af);
if (r < 0)
goto fail;
@@ -567,7 +576,7 @@ enum nss_status _nss_resolve_gethostbyaddr2_r(
if (r < 0)
goto fail;
r = sd_bus_message_append(req, "i", 0);
r = sd_bus_message_append(req, "t", (uint64_t) 0);
if (r < 0)
goto fail;
@@ -607,6 +616,15 @@ enum nss_status _nss_resolve_gethostbyaddr2_r(
return NSS_STATUS_UNAVAIL;
}
r = sd_bus_message_read(reply, "i", &ifindex);
if (r < 0)
goto fail;
if (ifindex < 0) {
r = -EINVAL;
goto fail;
}
r = sd_bus_message_enter_container(reply, 'a', "s");
if (r < 0)
goto fail;

138
src/resolve-host/resolve-host.c
View File

@@ -32,6 +32,7 @@
#include "build.h"
#include "resolved-dns-packet.h"
#include "resolved-def.h"
#define DNS_CALL_TIMEOUT_USEC (45*USEC_PER_SEC)
@@ -40,6 +41,32 @@ static int arg_ifindex = 0;
static int arg_type = 0;
static uint16_t arg_class = 0;
static bool arg_legend = true;
static uint64_t arg_flags = 0;
static void print_source(int ifindex, uint64_t flags) {
if (!arg_legend)
return;
if (ifindex <= 0 && flags == 0)
return;
fputs("\n-- Information acquired via", stdout);
if (flags != 0)
printf(" protocol%s%s%s",
flags & SD_RESOLVED_DNS ? " DNS" :"",
flags & SD_RESOLVED_LLMNR_IPV4 ? " LLMNR/IPv4" : "",
flags & SD_RESOLVED_LLMNR_IPV6 ? " LLMNR/IPv6" : "");
if (ifindex > 0) {
char ifname[IF_NAMESIZE] = "";
printf(" interface %s", strna(if_indextoname(ifindex, ifname)));
}
fputc('.', stdout);
fputc('\n', stdout);
}
static int resolve_host(sd_bus *bus, const char *name) {
@@ -47,7 +74,8 @@ static int resolve_host(sd_bus *bus, const char *name) {
_cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
const char *canonical = NULL;
unsigned c = 0;
int r;
int r, ifindex;
uint64_t flags;
assert(name);
@@ -67,7 +95,7 @@ static int resolve_host(sd_bus *bus, const char *name) {
if (r < 0)
return bus_log_create_error(r);
r = sd_bus_message_append(req, "si", name, arg_family);
r = sd_bus_message_append(req, "isit", arg_ifindex, name, arg_family, arg_flags);
if (r < 0)
return bus_log_create_error(r);
@@ -77,13 +105,17 @@ static int resolve_host(sd_bus *bus, const char *name) {
return r;
}
r = sd_bus_message_enter_container(reply, 'a', "(iayi)");
r = sd_bus_message_read(reply, "i", &ifindex);
if (r < 0)
return bus_log_parse_error(r);
while ((r = sd_bus_message_enter_container(reply, 'r', "iayi")) > 0) {
r = sd_bus_message_enter_container(reply, 'a', "(iay)");
if (r < 0)
return bus_log_parse_error(r);
while ((r = sd_bus_message_enter_container(reply, 'r', "iay")) > 0) {
const void *a;
int family, ifindex;
int family;
size_t sz;
_cleanup_free_ char *pretty = NULL;
char ifname[IF_NAMESIZE] = "";
@@ -96,10 +128,6 @@ static int resolve_host(sd_bus *bus, const char *name) {
if (r < 0)
return bus_log_parse_error(r);
r = sd_bus_message_read(reply, "i", &ifindex);
if (r < 0)
return bus_log_parse_error(r);
r = sd_bus_message_exit_container(reply);
if (r < 0)
return bus_log_parse_error(r);
@@ -115,12 +143,6 @@ static int resolve_host(sd_bus *bus, const char *name) {
continue;
}
if (ifindex < 0) {
log_error("%s: systemd-resolved returned invalid interface index %i",
name, ifindex);
continue;
}
if (ifindex > 0) {
char *t;
@@ -131,12 +153,6 @@ static int resolve_host(sd_bus *bus, const char *name) {
}
}
if (arg_ifindex > 0 && ifindex > 0 && ifindex != arg_ifindex) {
log_debug("%s: skipping entry with ifindex %i (%s)",
name, ifindex, ifname);
continue;
}
r = in_addr_to_string(family, a, &pretty);
if (r < 0) {
log_error("%s: failed to print address: %s", name, strerror(-r));
@@ -157,7 +173,7 @@ static int resolve_host(sd_bus *bus, const char *name) {
if (r < 0)
return bus_log_parse_error(r);
r = sd_bus_message_read(reply, "s", &canonical);
r = sd_bus_message_read(reply, "st", &canonical, &flags);
if (r < 0)
return bus_log_parse_error(r);
@@ -172,6 +188,8 @@ static int resolve_host(sd_bus *bus, const char *name) {
return -ESRCH;
}
print_source(ifindex, flags);
return 0;
}
@@ -180,6 +198,7 @@ static int resolve_address(sd_bus *bus, int family, const union in_addr_union *a
_cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
_cleanup_free_ char *pretty = NULL;
char ifname[IF_NAMESIZE] = "";
uint64_t flags;
unsigned c = 0;
const char *n;
int r;
@@ -218,7 +237,7 @@ static int resolve_address(sd_bus *bus, int family, const union in_addr_union *a
if (r < 0)
return bus_log_create_error(r);
r = sd_bus_message_append(req, "i", family);
r = sd_bus_message_append(req, "ii", ifindex, family);
if (r < 0)
return bus_log_create_error(r);
@@ -226,7 +245,7 @@ static int resolve_address(sd_bus *bus, int family, const union in_addr_union *a
if (r < 0)
return bus_log_create_error(r);
r = sd_bus_message_append(req, "i", ifindex);
r = sd_bus_message_append(req, "t", arg_flags);
if (r < 0)
return bus_log_create_error(r);
@@ -236,6 +255,10 @@ static int resolve_address(sd_bus *bus, int family, const union in_addr_union *a
return r;
}
r = sd_bus_message_read(reply, "i", &ifindex);
if (r < 0)
return bus_log_parse_error(r);
r = sd_bus_message_enter_container(reply, 'a', "s");
if (r < 0)
return bus_log_create_error(r);
@@ -257,11 +280,17 @@ static int resolve_address(sd_bus *bus, int family, const union in_addr_union *a
if (r < 0)
return bus_log_parse_error(r);
r = sd_bus_message_read(reply, "t", &flags);
if (r < 0)
return bus_log_parse_error(r);
if (c == 0) {
log_error("%s: no names found", pretty);
return -ESRCH;
}
print_source(ifindex, flags);
return 0;
}
@@ -296,7 +325,8 @@ static int resolve_record(sd_bus *bus, const char *name) {
_cleanup_bus_message_unref_ sd_bus_message *req = NULL, *reply = NULL;
_cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
unsigned n = 0;
int r;
uint64_t flags;
int r, ifindex;
assert(name);
@@ -317,7 +347,7 @@ static int resolve_record(sd_bus *bus, const char *name) {
return bus_log_create_error(r);
assert((uint16_t) arg_type == arg_type);
r = sd_bus_message_append(req, "sqq", name, arg_class, arg_type);
r = sd_bus_message_append(req, "isqqt", arg_ifindex, name, arg_class, arg_type, arg_flags);
if (r < 0)
return bus_log_create_error(r);
@@ -327,6 +357,10 @@ static int resolve_record(sd_bus *bus, const char *name) {
return r;
}
r = sd_bus_message_read(reply, "i", &ifindex);
if (r < 0)
return bus_log_parse_error(r);
r = sd_bus_message_enter_container(reply, 'a', "(qqay)");
if (r < 0)
return bus_log_parse_error(r);
@@ -381,11 +415,17 @@ static int resolve_record(sd_bus *bus, const char *name) {
if (r < 0)
return bus_log_parse_error(r);
r = sd_bus_message_read(reply, "t", &flags);
if (r < 0)
return bus_log_parse_error(r);
if (n == 0) {
log_error("%s: no records found", name);
return -ESRCH;
}
print_source(ifindex, flags);
return 0;
}
@@ -418,14 +458,15 @@ static void help_dns_classes(void) {
static void help(void) {
printf("%s [OPTIONS...]\n\n"
"Resolve IPv4 or IPv6 addresses.\n\n"
" -h --help Show this help\n"
" --version Show package version\n"
" -4 Resolve IPv4 addresses\n"
" -6 Resolve IPv6 addresses\n"
" -i INTERFACE Filter by interface\n"
" -t --type=TYPE Query RR with DNS type\n"
" -c --class=CLASS Query RR with DNS class\n"
" --no-legend Do not print column headers\n"
" -h --help Show this help\n"
" --version Show package version\n"
" -4 Resolve IPv4 addresses\n"
" -6 Resolve IPv6 addresses\n"
" -i INTERFACE Look on interface\n"
" -p --protocol=PROTOCOL Look via protocol\n"
" -t --type=TYPE Query RR with DNS type\n"
" -c --class=CLASS Query RR with DNS class\n"
" --no-legend Do not print column headers\n"
, program_invocation_short_name);
}
@@ -436,11 +477,12 @@ static int parse_argv(int argc, char *argv[]) {
};
static const struct option options[] = {
{ "help", no_argument, NULL, 'h' },
{ "version", no_argument, NULL, ARG_VERSION },
{ "type", no_argument, NULL, 't' },
{ "class", no_argument, NULL, 'c' },
{ "no-legend", no_argument, NULL, ARG_NO_LEGEND },
{ "help", no_argument, NULL, 'h' },
{ "version", no_argument, NULL, ARG_VERSION },
{ "type", required_argument, NULL, 't' },
{ "class", required_argument, NULL, 'c' },
{ "no-legend", no_argument, NULL, ARG_NO_LEGEND },
{ "protocol", required_argument, NULL, 'p' },
{}
};
@@ -449,7 +491,7 @@ static int parse_argv(int argc, char *argv[]) {
assert(argc >= 0);
assert(argv);
while ((c = getopt_long(argc, argv, "h46i:t:c:", options, NULL)) >= 0)
while ((c = getopt_long(argc, argv, "h46i:t:c:p:", options, NULL)) >= 0)
switch(c) {
case 'h':
@@ -510,6 +552,22 @@ static int parse_argv(int argc, char *argv[]) {
arg_legend = false;
break;
case 'p':
if (streq(optarg, "dns"))
arg_flags |= SD_RESOLVED_DNS;
else if (streq(optarg, "llmnr"))
arg_flags |= SD_RESOLVED_LLMNR;
else if (streq(optarg, "llmnr-ipv4"))
arg_flags |= SD_RESOLVED_LLMNR_IPV4;
else if (streq(optarg, "llmnr-ipv6"))
arg_flags |= SD_RESOLVED_LLMNR_IPV6;
else {
log_error("Unknown protocol specifier: %s", optarg);
return -EINVAL;
}
break;
case '?':
return -EINVAL;

97
src/resolve/resolved-bus.c
View File

@@ -24,6 +24,7 @@
#include "resolved-dns-domain.h"
#include "resolved-bus.h"
#include "resolved-def.h"
static int reply_query_state(DnsQuery *q) {
_cleanup_free_ char *ip = NULL;
@@ -90,13 +91,13 @@ static int reply_query_state(DnsQuery *q) {
}
}
static int append_address(sd_bus_message *reply, DnsResourceRecord *rr, int ifindex) {
static int append_address(sd_bus_message *reply, DnsResourceRecord *rr) {
int r;
assert(reply);
assert(rr);
r = sd_bus_message_open_container(reply, 'r', "iayi");
r = sd_bus_message_open_container(reply, 'r', "iay");
if (r < 0)
return r;
@@ -119,10 +120,6 @@ static int append_address(sd_bus_message *reply, DnsResourceRecord *rr, int ifin
if (r < 0)
return r;
r = sd_bus_message_append(reply, "i", ifindex);
if (r < 0)
return r;
r = sd_bus_message_close_container(reply);
if (r < 0)
return r;
@@ -135,7 +132,7 @@ static void bus_method_resolve_hostname_complete(DnsQuery *q) {
_cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
_cleanup_(dns_answer_unrefp) DnsAnswer *answer = NULL;
unsigned added = 0, i;
int r, ifindex;
int r;
assert(q);
@@ -148,11 +145,13 @@ static void bus_method_resolve_hostname_complete(DnsQuery *q) {
if (r < 0)
goto finish;
r = sd_bus_message_open_container(reply, 'a', "(iayi)");
r = sd_bus_message_append(reply, "i", q->answer_ifindex);
if (r < 0)
goto finish;
ifindex = q->answer_ifindex;
r = sd_bus_message_open_container(reply, 'a', "(iay)");
if (r < 0)
goto finish;
if (q->answer) {
answer = dns_answer_ref(q->answer);
@@ -173,7 +172,7 @@ static void bus_method_resolve_hostname_complete(DnsQuery *q) {
continue;
}
r = append_address(reply, answer->rrs[i], ifindex);
r = append_address(reply, answer->rrs[i]);
if (r < 0)
goto finish;
@@ -211,7 +210,7 @@ static void bus_method_resolve_hostname_complete(DnsQuery *q) {
if (r == 0)
continue;
r = append_address(reply, answer->rrs[i], ifindex);
r = append_address(reply, answer->rrs[i]);
if (r < 0)
goto finish;
@@ -244,7 +243,7 @@ static void bus_method_resolve_hostname_complete(DnsQuery *q) {
/* Return the precise spelling and uppercasing reported by the server */
assert(canonical);
r = sd_bus_message_append(reply, "s", DNS_RESOURCE_KEY_NAME(canonical->key));
r = sd_bus_message_append(reply, "st", DNS_RESOURCE_KEY_NAME(canonical->key), SD_RESOLVED_FLAGS_MAKE(q->answer_protocol, q->answer_family));
if (r < 0)
goto finish;
@@ -259,11 +258,27 @@ finish:
dns_query_free(q);
}
static int check_ifindex_flags(int ifindex, uint64_t *flags, sd_bus_error *error) {
assert(flags);
if (ifindex < 0)
return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid interface index");
if (*flags & ~SD_RESOLVED_FLAGS_ALL)
return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid flags parameter");
if (*flags == 0)
*flags = SD_RESOLVED_FLAGS_DEFAULT;
return 0;
}
static int bus_method_resolve_hostname(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) {
_cleanup_(dns_question_unrefp) DnsQuestion *question = NULL;
Manager *m = userdata;
const char *hostname;
int family;
int family, ifindex;
uint64_t flags;
DnsQuery *q;
int r;
@@ -271,7 +286,7 @@ static int bus_method_resolve_hostname(sd_bus *bus, sd_bus_message *message, voi
assert(message);
assert(m);
r = sd_bus_message_read(message, "si", &hostname, &family);
r = sd_bus_message_read(message, "isit", &ifindex, &hostname, &family, &flags);
if (r < 0)
return r;
@@ -282,6 +297,10 @@ static int bus_method_resolve_hostname(sd_bus *bus, sd_bus_message *message, voi
if (r < 0)
return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid hostname '%s'", hostname);
r = check_ifindex_flags(ifindex, &flags, error);
if (r < 0)
return r;
question = dns_question_new(family == AF_UNSPEC ? 2 : 1);
if (!question)
return -ENOMEM;
@@ -310,7 +329,7 @@ static int bus_method_resolve_hostname(sd_bus *bus, sd_bus_message *message, voi
return r;
}
r = dns_query_new(m, &q, question);
r = dns_query_new(m, &q, question, ifindex, flags);
if (r < 0)
return r;
@@ -353,6 +372,10 @@ static void bus_method_resolve_address_complete(DnsQuery *q) {
if (r < 0)
goto finish;
r = sd_bus_message_append(reply, "i", q->answer_ifindex);
if (r < 0)
goto finish;
r = sd_bus_message_open_container(reply, 'a', "s");
if (r < 0)
goto finish;
@@ -388,6 +411,10 @@ static void bus_method_resolve_address_complete(DnsQuery *q) {
if (r < 0)
goto finish;
r = sd_bus_message_append(reply, "t", SD_RESOLVED_FLAGS_MAKE(q->answer_protocol, q->answer_family));
if (r < 0)
goto finish;
r = sd_bus_send(q->manager->bus, reply, NULL);
finish:
@@ -405,6 +432,7 @@ static int bus_method_resolve_address(sd_bus *bus, sd_bus_message *message, void
_cleanup_free_ char *reverse = NULL;
Manager *m = userdata;
int family, ifindex;
uint64_t flags;
const void *d;
DnsQuery *q;
size_t sz;
@@ -414,7 +442,7 @@ static int bus_method_resolve_address(sd_bus *bus, sd_bus_message *message, void
assert(message);
assert(m);
r = sd_bus_message_read(message, "i", &family);
r = sd_bus_message_read(message, "ii", &ifindex, &family);
if (r < 0)
return r;
@@ -428,11 +456,13 @@ static int bus_method_resolve_address(sd_bus *bus, sd_bus_message *message, void
if (sz != FAMILY_ADDRESS_SIZE(family))
return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid address size");
r = sd_bus_message_read(message, "i", &ifindex);
r = sd_bus_message_read(message, "t", &flags);
if (r < 0)
return r;
r = check_ifindex_flags(ifindex, &flags, error);
if (r < 0)
return r;
if (ifindex < 0)
return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid interface index");
r = dns_name_reverse(family, d, &reverse);
if (r < 0)
@@ -452,7 +482,7 @@ static int bus_method_resolve_address(sd_bus *bus, sd_bus_message *message, void
if (r < 0)
return r;
r = dns_query_new(m, &q, question);
r = dns_query_new(m, &q, question, ifindex, flags);
if (r < 0)
return r;
@@ -495,6 +525,10 @@ static void bus_method_resolve_record_complete(DnsQuery *q) {
if (r < 0)
goto finish;
r = sd_bus_message_append(reply, "i", q->answer_ifindex);
if (r < 0)
goto finish;
r = sd_bus_message_open_container(reply, 'a', "(qqay)");
if (r < 0)
goto finish;
@@ -549,6 +583,10 @@ static void bus_method_resolve_record_complete(DnsQuery *q) {
if (r < 0)
goto finish;
r = sd_bus_message_append(reply, "t", SD_RESOLVED_FLAGS_MAKE(q->answer_protocol, q->answer_family));
if (r < 0)
goto finish;
r = sd_bus_send(q->manager->bus, reply, NULL);
finish:
@@ -564,16 +602,17 @@ static int bus_method_resolve_record(sd_bus *bus, sd_bus_message *message, void
_cleanup_(dns_resource_key_unrefp) DnsResourceKey *key = NULL;
_cleanup_(dns_question_unrefp) DnsQuestion *question = NULL;
Manager *m = userdata;
DnsQuery *q;
int r;
uint16_t class, type;
const char *name;
int r, ifindex;
uint64_t flags;
DnsQuery *q;
assert(bus);
assert(message);
assert(m);
r = sd_bus_message_read(message, "sqq", &name, &class, &type);
r = sd_bus_message_read(message, "isqqt", &ifindex, &name, &class, &type, &flags);
if (r < 0)
return r;
@@ -581,6 +620,10 @@ static int bus_method_resolve_record(sd_bus *bus, sd_bus_message *message, void
if (r < 0)
return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid name '%s'", name);
r = check_ifindex_flags(ifindex, &flags, error);
if (r < 0)
return r;
question = dns_question_new(1);
if (!question)
return -ENOMEM;
@@ -593,7 +636,7 @@ static int bus_method_resolve_record(sd_bus *bus, sd_bus_message *message, void
if (r < 0)
return r;
r = dns_query_new(m, &q, question);
r = dns_query_new(m, &q, question, ifindex, flags);
if (r < 0)
return r;
@@ -620,9 +663,9 @@ static int bus_method_resolve_record(sd_bus *bus, sd_bus_message *message, void
static const sd_bus_vtable resolve_vtable[] = {
SD_BUS_VTABLE_START(0),
SD_BUS_METHOD("ResolveHostname", "si", "a(iayi)s", bus_method_resolve_hostname, SD_BUS_VTABLE_UNPRIVILEGED),
SD_BUS_METHOD("ResolveAddress", "iayi", "as", bus_method_resolve_address, SD_BUS_VTABLE_UNPRIVILEGED),
SD_BUS_METHOD("ResolveRecord", "sqq", "a(qqay)", bus_method_resolve_record, SD_BUS_VTABLE_UNPRIVILEGED),
SD_BUS_METHOD("ResolveHostname", "isit", "ia(iay)st", bus_method_resolve_hostname, SD_BUS_VTABLE_UNPRIVILEGED),
SD_BUS_METHOD("ResolveAddress", "iiayt", "iast", bus_method_resolve_address, SD_BUS_VTABLE_UNPRIVILEGED),
SD_BUS_METHOD("ResolveRecord", "isqqt", "ia(qqay)t", bus_method_resolve_record, SD_BUS_VTABLE_UNPRIVILEGED),
SD_BUS_VTABLE_END,
};

30
src/resolve/resolved-def.h Normal file
View File

@@ -0,0 +1,30 @@
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
#pragma once
/***
This file is part of systemd.
Copyright 2014 Lennart Poettering
systemd is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
systemd is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
#define SD_RESOLVED_DNS ((uint64_t) 1)
#define SD_RESOLVED_LLMNR_IPV4 ((uint64_t) 2)
#define SD_RESOLVED_LLMNR_IPV6 ((uint64_t) 4)
#define SD_RESOLVED_LLMNR (SD_RESOLVED_LLMNR_IPV4|SD_RESOLVED_LLMNR_IPV6)
#define SD_RESOLVED_FLAGS_ALL (SD_RESOLVED_DNS|SD_RESOLVED_LLMNR_IPV4|SD_RESOLVED_LLMNR_IPV6)
#define SD_RESOLVED_FLAGS_DEFAULT SD_RESOLVED_FLAGS_ALL

14
src/resolve/resolved-dns-packet.h
View File

@@ -34,6 +34,7 @@ typedef struct DnsPacket DnsPacket;
#include "resolved-dns-rr.h"
#include "resolved-dns-question.h"
#include "resolved-dns-answer.h"
#include "resolved-def.h"
typedef enum DnsProtocol {
DNS_PROTOCOL_DNS,
@@ -220,3 +221,16 @@ enum {
const char* dnssec_algorithm_to_string(int i) _const_;
int dnssec_algorithm_from_string(const char *s) _pure_;
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)
return SD_RESOLVED_DNS;
if (protocol == DNS_PROTOCOL_LLMNR)
return family == AF_INET6 ? SD_RESOLVED_LLMNR_IPV6 : SD_RESOLVED_LLMNR_IPV4;
return 0;
}

12
src/resolve/resolved-dns-query.c
View File

@@ -66,7 +66,7 @@ DnsQuery *dns_query_free(DnsQuery *q) {
return NULL;
}
int dns_query_new(Manager *m, DnsQuery **ret, DnsQuestion *question) {
int dns_query_new(Manager *m, DnsQuery **ret, DnsQuestion *question, int ifindex, uint64_t flags) {
_cleanup_(dns_query_freep) DnsQuery *q = NULL;
unsigned i;
int r;
@@ -86,6 +86,8 @@ int dns_query_new(Manager *m, DnsQuery **ret, DnsQuestion *question) {
return -ENOMEM;
q->question = dns_question_ref(question);
q->ifindex = ifindex;
q->flags = flags;
for (i = 0; i < question->n_keys; i++) {
_cleanup_free_ char *p;
@@ -233,7 +235,7 @@ int dns_query_go(DnsQuery *q) {
LIST_FOREACH(scopes, s, q->manager->dns_scopes) {
DnsScopeMatch match;
match = dns_scope_good_domain(s, name);
match = dns_scope_good_domain(s, q->ifindex, q->flags, name);
if (match < 0)
return match;
@@ -263,7 +265,7 @@ int dns_query_go(DnsQuery *q) {
LIST_FOREACH(scopes, s, first->scopes_next) {
DnsScopeMatch match;
match = dns_scope_good_domain(s, name);
match = dns_scope_good_domain(s, q->ifindex, q->flags, name);
if (match < 0)
goto fail;
@@ -278,6 +280,8 @@ int dns_query_go(DnsQuery *q) {
q->answer = dns_answer_unref(q->answer);
q->answer_ifindex = 0;
q->answer_rcode = 0;
q->answer_family = AF_UNSPEC;
q->answer_protocol = _DNS_PROTOCOL_INVALID;
r = sd_event_add_time(
q->manager->event,
@@ -422,6 +426,8 @@ void dns_query_ready(DnsQuery *q) {
q->answer = dns_answer_ref(answer);
q->answer_rcode = rcode;
q->answer_ifindex = (scope && scope->link) ? scope->link->ifindex : 0;
q->answer_protocol = scope ? scope->protocol : _DNS_PROTOCOL_INVALID;
q->answer_family = scope ? scope->family : AF_UNSPEC;
}
dns_query_complete(q, state);

7
src/resolve/resolved-dns-query.h
View File

@@ -41,6 +41,9 @@ struct DnsQuery {
Manager *manager;
DnsQuestion *question;
uint64_t flags;
int ifindex;
DnsTransactionState state;
unsigned n_cname_redirects;
@@ -49,6 +52,8 @@ struct DnsQuery {
/* Discovered data */
DnsAnswer *answer;
int answer_ifindex;
int answer_family;
DnsProtocol answer_protocol;
int answer_rcode;
/* Bus client information */
@@ -68,7 +73,7 @@ struct DnsQuery {
LIST_FIELDS(DnsQuery, queries);
};
int dns_query_new(Manager *m, DnsQuery **q, DnsQuestion *question);
int dns_query_new(Manager *m, DnsQuery **q, DnsQuestion *question, int family, uint64_t flags);
DnsQuery *dns_query_free(DnsQuery *q);
int dns_query_go(DnsQuery *q);

8
src/resolve/resolved-dns-scope.c
View File

@@ -291,12 +291,18 @@ int dns_scope_tcp_socket(DnsScope *s, int family, const union in_addr_union *add
return ret;
}
DnsScopeMatch dns_scope_good_domain(DnsScope *s, const char *domain) {
DnsScopeMatch dns_scope_good_domain(DnsScope *s, int ifindex, uint64_t flags, const char *domain) {
char **i;
assert(s);
assert(domain);
if (ifindex != 0 && (!s->link || s->link->ifindex != ifindex))
return DNS_SCOPE_NO;
if ((SD_RESOLVED_FLAGS_MAKE(s->protocol, s->family) & flags) == 0)
return DNS_SCOPE_NO;
STRV_FOREACH(i, s->domains)
if (dns_name_endswith(domain, *i) > 0)
return DNS_SCOPE_YES;

2
src/resolve/resolved-dns-scope.h
View File

@@ -71,7 +71,7 @@ DnsScope* dns_scope_free(DnsScope *s);
int dns_scope_emit(DnsScope *s, DnsPacket *p);
int dns_scope_tcp_socket(DnsScope *s, int family, const union in_addr_union *address, uint16_t port);
DnsScopeMatch dns_scope_good_domain(DnsScope *s, const char *domain);
DnsScopeMatch dns_scope_good_domain(DnsScope *s, int ifindex, uint64_t flags, const char *domain);
int dns_scope_good_key(DnsScope *s, DnsResourceKey *key);
int dns_scope_good_dns_server(DnsScope *s, int family, const union in_addr_union *address);