#include <getopt.h>

#include <net/if.h>

#include "sd-bus.h"

#include "af-list.h"

#include "alloc-util.h"

#include "bus-error.h"

#include "bus-util.h"

#include "escape.h"

#include "in-addr-util.h"

#include "parse-util.h"

#include "resolved-def.h"

#include "resolved-dns-packet.h"

#define DNS_CALL_TIMEOUT_USEC (45*USEC_PER_SEC)

static int arg_family = AF_UNSPEC;

static int arg_ifindex = 0;

static uint16_t arg_type = 0;

static uint16_t arg_class = 0;

static bool arg_legend = true;

static uint64_t arg_flags = 0;

static bool arg_resolve_service = false;

static void print_source(uint64_t flags, usec_t rtt) {

char rtt_str[FORMAT_TIMESTAMP_MAX];

if (!arg_legend)

return;

if (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" : "");

assert_se(format_timespan(rtt_str, sizeof(rtt_str), rtt, 100));

printf(" in %s", rtt_str);

fputc('.', stdout);

fputc('\n', stdout);

printf("-- Data is authenticated: %s\n", yes_no(flags & SD_RESOLVED_AUTHENTICATED));

}

static int resolve_host(sd_bus *bus, const char *name) {

_cleanup_(sd_bus_message_unrefp) sd_bus_message *req = NULL, *reply = NULL;

_cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;

const char *canonical = NULL;

char ifname[IF_NAMESIZE] = "";

unsigned c = 0;

int r;

uint64_t flags;

usec_t ts;

assert(name);

if (arg_ifindex > 0 && !if_indextoname(arg_ifindex, ifname))

return log_error_errno(errno, "Failed to resolve interface name for index %i: %m", arg_ifindex);

log_debug("Resolving %s (family %s, interface %s).", name, af_to_name(arg_family) ?: "*", isempty(ifname) ? "*" : ifname);

r = sd_bus_message_new_method_call(

bus,

&req,

"org.freedesktop.resolve1",

"/org/freedesktop/resolve1",

"org.freedesktop.resolve1.Manager",

"ResolveHostname");

if (r < 0)

return bus_log_create_error(r);

r = sd_bus_message_append(req, "isit", arg_ifindex, name, arg_family, arg_flags);

if (r < 0)

return bus_log_create_error(r);

ts = now(CLOCK_MONOTONIC);

r = sd_bus_call(bus, req, DNS_CALL_TIMEOUT_USEC, &error, &reply);

if (r < 0)

return log_error_errno(r, "%s: resolve call failed: %s", name, bus_error_message(&error, r));

ts = now(CLOCK_MONOTONIC) - ts;

r = sd_bus_message_enter_container(reply, 'a', "(iiay)");

if (r < 0)

return bus_log_parse_error(r);

while ((r = sd_bus_message_enter_container(reply, 'r', "iiay")) > 0) {

_cleanup_free_ char *pretty = NULL;

int ifindex, family;

const void *a;

size_t sz;

assert_cc(sizeof(int) == sizeof(int32_t));

r = sd_bus_message_read(reply, "ii", &ifindex, &family);

if (r < 0)

return bus_log_parse_error(r);

r = sd_bus_message_read_array(reply, 'y', &a, &sz);

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);

if (!IN_SET(family, AF_INET, AF_INET6)) {

log_debug("%s: skipping entry with family %d (%s)", name, family, af_to_name(family) ?: "unknown");

continue;

}

if (sz != FAMILY_ADDRESS_SIZE(family)) {

log_error("%s: systemd-resolved returned address of invalid size %zu for family %s", name, sz, af_to_name(family) ?: "unknown");

return -EINVAL;

}

ifname[0] = 0;

if (ifindex > 0 && !if_indextoname(ifindex, ifname))

log_warning_errno(errno, "Failed to resolve interface name for index %i: %m", ifindex);

r = in_addr_to_string(family, a, &pretty);

if (r < 0)

return log_error_errno(r, "Failed to print address for %s: %m", name);

printf("%*s%s %s%s%s\n",

(int) strlen(name), c == 0 ? name : "", c == 0 ? ":" : " ",

pretty,

isempty(ifname) ? "" : "%", ifname);

c++;

}

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);

r = sd_bus_message_read(reply, "st", &canonical, &flags);

if (r < 0)

return bus_log_parse_error(r);

if (!streq(name, canonical))

printf("%*s%s (%s)\n",

(int) strlen(name), c == 0 ? name : "", c == 0 ? ":" : " ",

canonical);

if (c == 0) {

log_error("%s: no addresses found", name);

return -ESRCH;

}

print_source(flags, ts);

return 0;

}

static int resolve_address(sd_bus *bus, int family, const union in_addr_union *address, int ifindex) {

_cleanup_(sd_bus_message_unrefp) sd_bus_message *req = NULL, *reply = NULL;

_cleanup_(sd_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;

usec_t ts;

int r;

assert(bus);

assert(IN_SET(family, AF_INET, AF_INET6));

assert(address);

if (ifindex <= 0)

ifindex = arg_ifindex;

r = in_addr_to_string(family, address, &pretty);

if (r < 0)

return log_oom();

if (ifindex > 0 && !if_indextoname(ifindex, ifname))

return log_error_errno(errno, "Failed to resolve interface name for index %i: %m", ifindex);

log_debug("Resolving %s%s%s.", pretty, isempty(ifname) ? "" : "%", ifname);

r = sd_bus_message_new_method_call(

bus,

&req,

"org.freedesktop.resolve1",

"/org/freedesktop/resolve1",

"org.freedesktop.resolve1.Manager",

"ResolveAddress");

if (r < 0)

return bus_log_create_error(r);

r = sd_bus_message_append(req, "ii", ifindex, family);

if (r < 0)

return bus_log_create_error(r);

r = sd_bus_message_append_array(req, 'y', address, FAMILY_ADDRESS_SIZE(family));

if (r < 0)

return bus_log_create_error(r);

r = sd_bus_message_append(req, "t", arg_flags);

if (r < 0)

return bus_log_create_error(r);

ts = now(CLOCK_MONOTONIC);

r = sd_bus_call(bus, req, DNS_CALL_TIMEOUT_USEC, &error, &reply);

if (r < 0) {

log_error("%s: resolve call failed: %s", pretty, bus_error_message(&error, r));

return r;

}

ts = now(CLOCK_MONOTONIC) - ts;

r = sd_bus_message_enter_container(reply, 'a', "(is)");

if (r < 0)

return bus_log_create_error(r);

while ((r = sd_bus_message_enter_container(reply, 'r', "is")) > 0) {

const char *n;

assert_cc(sizeof(int) == sizeof(int32_t));

r = sd_bus_message_read(reply, "is", &ifindex, &n);

if (r < 0)

return r;

r = sd_bus_message_exit_container(reply);

if (r < 0)

return r;

ifname[0] = 0;

if (ifindex > 0 && !if_indextoname(ifindex, ifname))

log_warning_errno(errno, "Failed to resolve interface name for index %i: %m", ifindex);

printf("%*s%*s%*s%s %s\n",

(int) strlen(pretty), c == 0 ? pretty : "",

isempty(ifname) ? 0 : 1, c > 0 || isempty(ifname) ? "" : "%",

(int) strlen(ifname), c == 0 ? ifname : "",

c == 0 ? ":" : " ",

n);

c++;

}

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);

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(flags, ts);

return 0;

}

static int parse_address(const char *s, int *family, union in_addr_union *address, int *ifindex) {

const char *percent, *a;

int ifi = 0;

int r;

percent = strchr(s, '%');

if (percent) {

if (parse_ifindex(percent+1, &ifi) < 0) {

ifi = if_nametoindex(percent+1);

if (ifi <= 0)

return -EINVAL;

}

a = strndupa(s, percent - s);

} else

a = s;

r = in_addr_from_string_auto(a, family, address);

if (r < 0)

return r;

*ifindex = ifi;

return 0;

}

static int resolve_record(sd_bus *bus, const char *name) {

_cleanup_(sd_bus_message_unrefp) sd_bus_message *req = NULL, *reply = NULL;

_cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;

char ifname[IF_NAMESIZE] = "";

unsigned n = 0;

uint64_t flags;

int r;

usec_t ts;

assert(name);

if (arg_ifindex > 0 && !if_indextoname(arg_ifindex, ifname))

return log_error_errno(errno, "Failed to resolve interface name for index %i: %m", arg_ifindex);

log_debug("Resolving %s %s %s (interface %s).", name, dns_class_to_string(arg_class), dns_type_to_string(arg_type), isempty(ifname) ? "*" : ifname);

r = sd_bus_message_new_method_call(

bus,

&req,

"org.freedesktop.resolve1",

"/org/freedesktop/resolve1",

"org.freedesktop.resolve1.Manager",

"ResolveRecord");

if (r < 0)

return bus_log_create_error(r);

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);

ts = now(CLOCK_MONOTONIC);

r = sd_bus_call(bus, req, DNS_CALL_TIMEOUT_USEC, &error, &reply);

if (r < 0) {

log_error("%s: resolve call failed: %s", name, bus_error_message(&error, r));

return r;

}

ts = now(CLOCK_MONOTONIC) - ts;

r = sd_bus_message_enter_container(reply, 'a', "(iqqay)");

if (r < 0)

return bus_log_parse_error(r);

while ((r = sd_bus_message_enter_container(reply, 'r', "iqqay")) > 0) {

_cleanup_(dns_resource_record_unrefp) DnsResourceRecord *rr = NULL;

_cleanup_(dns_packet_unrefp) DnsPacket *p = NULL;

_cleanup_free_ char *s = NULL;

uint16_t c, t;

int ifindex;

const void *d;

size_t l;

assert_cc(sizeof(int) == sizeof(int32_t));

r = sd_bus_message_read(reply, "iqq", &ifindex, &c, &t);

if (r < 0)

return bus_log_parse_error(r);

r = sd_bus_message_read_array(reply, 'y', &d, &l);

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);

r = dns_packet_new(&p, DNS_PROTOCOL_DNS, 0);

if (r < 0)

return log_oom();

p->refuse_compression = true;

r = dns_packet_append_blob(p, d, l, NULL);

if (r < 0)

return log_oom();

r = dns_packet_read_rr(p, &rr, NULL, NULL);

if (r < 0) {

log_error("Failed to parse RR.");

return r;

}

r = dns_resource_record_to_string(rr, &s);

if (r < 0) {

log_error("Failed to format RR.");

return r;

}

ifname[0] = 0;

if (ifindex > 0 && !if_indextoname(ifindex, ifname))

log_warning_errno(errno, "Failed to resolve interface name for index %i: %m", ifindex);

printf("%s%s%s\n", s, isempty(ifname) ? "" : " # interface ", ifname);

n++;

}

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);

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(flags, ts);

return 0;

}

static int resolve_service(sd_bus *bus, const char *name, const char *type, const char *domain) {

const char *canonical_name, *canonical_type, *canonical_domain;

_cleanup_(sd_bus_message_unrefp) sd_bus_message *req = NULL, *reply = NULL;

_cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;

char ifname[IF_NAMESIZE] = "";

size_t indent, sz;

uint64_t flags;

const char *p;

unsigned c;

usec_t ts;

int r;

assert(bus);

assert(domain);

if (isempty(name))

name = NULL;

if (isempty(type))

type = NULL;

if (arg_ifindex > 0 && !if_indextoname(arg_ifindex, ifname))

return log_error_errno(errno, "Failed to resolve interface name for index %i: %m", arg_ifindex);

if (name)

log_debug("Resolving service \"%s\" of type %s in %s (family %s, interface %s).", name, type, domain, af_to_name(arg_family) ?: "*", isempty(ifname) ? "*" : ifname);

else if (type)

log_debug("Resolving service type %s of %s (family %s, interface %s).", type, domain, af_to_name(arg_family) ?: "*", isempty(ifname) ? "*" : ifname);

else

log_debug("Resolving service type %s (family %s, interface %s).", domain, af_to_name(arg_family) ?: "*", isempty(ifname) ? "*" : ifname);

r = sd_bus_message_new_method_call(

bus,

&req,

"org.freedesktop.resolve1",

"/org/freedesktop/resolve1",

"org.freedesktop.resolve1.Manager",

"ResolveService");

if (r < 0)

return bus_log_create_error(r);

r = sd_bus_message_append(req, "isssit", arg_ifindex, name, type, domain, arg_family, arg_flags);

if (r < 0)

return bus_log_create_error(r);

ts = now(CLOCK_MONOTONIC);

r = sd_bus_call(bus, req, DNS_CALL_TIMEOUT_USEC, &error, &reply);

if (r < 0)

return log_error_errno(r, "Resolve call failed: %s", bus_error_message(&error, r));

ts = now(CLOCK_MONOTONIC) - ts;

r = sd_bus_message_enter_container(reply, 'a', "(qqqsa(iiay)s)");

if (r < 0)

return bus_log_parse_error(r);

indent =

(name ? strlen(name) + 1 : 0) +

(type ? strlen(type) + 1 : 0) +

strlen(domain) + 2;

c = 0;

while ((r = sd_bus_message_enter_container(reply, 'r', "qqqsa(iiay)s")) > 0) {

uint16_t priority, weight, port;

const char *hostname, *canonical;

r = sd_bus_message_read(reply, "qqqs", &priority, &weight, &port, &hostname);

if (r < 0)

return bus_log_parse_error(r);

if (name)

printf("%*s%s", (int) strlen(name), c == 0 ? name : "", c == 0 ? "/" : " ");

if (type)

printf("%*s%s", (int) strlen(type), c == 0 ? type : "", c == 0 ? "/" : " ");

printf("%*s%s %s:%u [priority=%u, weight=%u]\n",

(int) strlen(domain), c == 0 ? domain : "",

c == 0 ? ":" : " ",

hostname, port,

priority, weight);

r = sd_bus_message_enter_container(reply, 'a', "(iiay)");

if (r < 0)

return bus_log_parse_error(r);

while ((r = sd_bus_message_enter_container(reply, 'r', "iiay")) > 0) {

_cleanup_free_ char *pretty = NULL;

int ifindex, family;

const void *a;

assert_cc(sizeof(int) == sizeof(int32_t));

r = sd_bus_message_read(reply, "ii", &ifindex, &family);

if (r < 0)

return bus_log_parse_error(r);

r = sd_bus_message_read_array(reply, 'y', &a, &sz);

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);

if (!IN_SET(family, AF_INET, AF_INET6)) {

log_debug("%s: skipping entry with family %d (%s)", name, family, af_to_name(family) ?: "unknown");

continue;

}

if (sz != FAMILY_ADDRESS_SIZE(family)) {

log_error("%s: systemd-resolved returned address of invalid size %zu for family %s", name, sz, af_to_name(family) ?: "unknown");

return -EINVAL;

}

ifname[0] = 0;

if (ifindex > 0 && !if_indextoname(ifindex, ifname))

log_warning_errno(errno, "Failed to resolve interface name for index %i: %m", ifindex);

r = in_addr_to_string(family, a, &pretty);

if (r < 0)

return log_error_errno(r, "Failed to print address for %s: %m", name);

printf("%*s%s%s%s\n", (int) indent, "", pretty, isempty(ifname) ? "" : "%s", ifname);

}

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);

r = sd_bus_message_read(reply, "s", &canonical);

if (r < 0)

return bus_log_parse_error(r);

if (!streq(hostname, canonical))

printf("%*s(%s)\n", (int) indent, "", canonical);

r = sd_bus_message_exit_container(reply);

if (r < 0)

return bus_log_parse_error(r);

c++;

}

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);

r = sd_bus_message_enter_container(reply, 'a', "ay");

if (r < 0)

return bus_log_parse_error(r);

c = 0;

while ((r = sd_bus_message_read_array(reply, 'y', (const void**) &p, &sz)) > 0) {

_cleanup_free_ char *escaped = NULL;

escaped = cescape_length(p, sz);

if (!escaped)

return log_oom();

printf("%*s%s\n", (int) indent, "", escaped);

c++;

}

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);

r = sd_bus_message_read(reply, "ssst", &canonical_name, &canonical_type, &canonical_domain, &flags);

if (r < 0)

return bus_log_parse_error(r);

if (isempty(canonical_name))

canonical_name = NULL;

if (isempty(canonical_type))

canonical_type = NULL;

if (!streq_ptr(name, canonical_name) ||

!streq_ptr(type, canonical_type) ||

!streq_ptr(domain, canonical_domain)) {

printf("%*s(", (int) indent, "");

if (canonical_name)

printf("%s/", canonical_name);

if (canonical_type)

printf("%s/", canonical_type);

printf("%s)\n", canonical_domain);

}

print_source(flags, ts);

return 0;

}

static void help_dns_types(void) {

int i;

const char *t;

if (arg_legend)

puts("Known DNS RR types:");

for (i = 0; i < _DNS_TYPE_MAX; i++) {

t = dns_type_to_string(i);

if (t)

puts(t);

}

}

static void help_dns_classes(void) {

int i;

const char *t;

if (arg_legend)

puts("Known DNS RR classes:");

for (i = 0; i < _DNS_CLASS_MAX; i++) {

t = dns_class_to_string(i);

if (t)

puts(t);

}

}

static void help(void) {

printf("%s [OPTIONS...] NAME...\n"

"%s [OPTIONS...] --service [[NAME] TYPE] DOMAIN\n\n"

"Resolve domain names, IPv4 or IPv6 addresses, resource records, and services.\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 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"

" --service Resolve service (SRV)\n"

" --service-address=BOOL Do [not] resolve address for services\n"

" --service-txt=BOOL Do [not] resolve TXT records for services\n"

" --cname=BOOL Do [not] follow CNAME redirects\n"

" --search=BOOL Do [not] use search domains\n"

" --legend=BOOL Do [not] print column headers\n"

, program_invocation_short_name, program_invocation_short_name);

}

static int parse_argv(int argc, char *argv[]) {

enum {

ARG_VERSION = 0x100,

ARG_LEGEND,

ARG_SERVICE,

ARG_CNAME,

ARG_SERVICE_ADDRESS,

ARG_SERVICE_TXT,

ARG_SEARCH,

};

static const struct option options[] = {

{ "help", no_argument, NULL, 'h' },

{ "version", no_argument, NULL, ARG_VERSION },

{ "type", required_argument, NULL, 't' },

{ "class", required_argument, NULL, 'c' },

{ "legend", required_argument, NULL, ARG_LEGEND },

{ "protocol", required_argument, NULL, 'p' },

{ "cname", required_argument, NULL, ARG_CNAME },

{ "service", no_argument, NULL, ARG_SERVICE },

{ "service-address", required_argument, NULL, ARG_SERVICE_ADDRESS },

{ "service-txt", required_argument, NULL, ARG_SERVICE_TXT },

{ "search", required_argument, NULL, ARG_SEARCH },

{}

};

int c, r;

assert(argc >= 0);

assert(argv);

while ((c = getopt_long(argc, argv, "h46i:t:c:p:", options, NULL)) >= 0)

switch(c) {

case 'h':

help();

return 0; /* done */;

case ARG_VERSION:

return version();

case '4':

arg_family = AF_INET;

break;

case '6':

arg_family = AF_INET6;

break;

case 'i': {

int ifi;

if (parse_ifindex(optarg, &ifi) >= 0)

arg_ifindex = ifi;

else {

ifi = if_nametoindex(optarg);

if (ifi <= 0)

return log_error_errno(errno, "Unknown interface %s: %m", optarg);

arg_ifindex = ifi;

}

break;

}

case 't':

if (streq(optarg, "help")) {

help_dns_types();

return 0;

}

r = dns_type_from_string(optarg);

if (r < 0) {

log_error("Failed to parse RR record type %s", optarg);

return r;

}

arg_type = (uint16_t) r;

assert((int) arg_type == r);

break;

case 'c':

if (streq(optarg, "help")) {

help_dns_classes();

return 0;

}

r = dns_class_from_string(optarg);

if (r < 0) {

log_error("Failed to parse RR record class %s", optarg);

return r;

}

arg_class = (uint16_t) r;

assert((int) arg_class == r);

break;

case ARG_LEGEND:

r = parse_boolean(optarg);

if (r < 0)

return log_error_errno(r, "Failed to parse --legend= argument");

arg_legend = r;

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 ARG_SERVICE:

arg_resolve_service = true;

break;

case ARG_CNAME:

r = parse_boolean(optarg);

if (r < 0)

return log_error_errno(r, "Failed to parse --cname= argument.");

if (r == 0)

arg_flags |= SD_RESOLVED_NO_CNAME;

else

arg_flags &= ~SD_RESOLVED_NO_CNAME;

break;

case ARG_SERVICE_ADDRESS:

r = parse_boolean(optarg);

if (r < 0)

return log_error_errno(r, "Failed to parse --service-address= argument.");

if (r == 0)

arg_flags |= SD_RESOLVED_NO_ADDRESS;

else

arg_flags &= ~SD_RESOLVED_NO_ADDRESS;

break;

case ARG_SERVICE_TXT:

r = parse_boolean(optarg);

if (r < 0)

return log_error_errno(r, "Failed to parse --service-txt= argument.");

if (r == 0)

arg_flags |= SD_RESOLVED_NO_TXT;

else

arg_flags &= ~SD_RESOLVED_NO_TXT;

break;

case ARG_SEARCH:

r = parse_boolean(optarg);

if (r < 0)

return log_error_errno(r, "Failed to parse --search argument.");

if (r == 0)

arg_flags |= SD_RESOLVED_NO_SEARCH;

else

arg_flags &= ~SD_RESOLVED_NO_SEARCH;

break;

case '?':

return -EINVAL;

default:

assert_not_reached("Unhandled option");

}

if (arg_type == 0 && arg_class != 0) {

log_error("--class= may only be used in conjunction with --type=.");

return -EINVAL;

}

if (arg_type != 0 && arg_resolve_service) {

log_error("--service and --type= may not be combined.");

return -EINVAL;

}

if (arg_type != 0 && arg_class == 0)

arg_class = DNS_CLASS_IN;

return 1 /* work to do */;

}

int main(int argc, char **argv) {

_cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL;

int r;

log_parse_environment();

log_open();

r = parse_argv(argc, argv);

if (r <= 0)

goto finish;

if (optind >= argc) {

log_error("No arguments passed");

r = -EINVAL;

goto finish;

}

r = sd_bus_open_system(&bus);

if (r < 0) {

log_error_errno(r, "sd_bus_open_system: %m");

goto finish;

}

if (arg_resolve_service) {

if (argc < optind + 1) {

log_error("Domain specification required.");

r = -EINVAL;

goto finish;

} else if (argc == optind + 1)

r = resolve_service(bus, NULL, NULL, argv[optind]);

else if (argc == optind + 2)

r = resolve_service(bus, NULL, argv[optind], argv[optind+1]);

else if (argc == optind + 3)

r = resolve_service(bus, argv[optind], argv[optind+1], argv[optind+2]);

else {

log_error("Too many arguments");

r = -EINVAL;

goto finish;

}

goto finish;

}

while (argv[optind]) {

int family, ifindex, k;

union in_addr_union a;

if (arg_type != 0)

k = resolve_record(bus, argv[optind]);

else {

k = parse_address(argv[optind], &family, &a, &ifindex);

if (k >= 0)

k = resolve_address(bus, family, &a, ifindex);

else

k = resolve_host(bus, argv[optind]);

}

if (r == 0)

r = k;

optind++;

}

finish:

return r == 0 ? EXIT_SUCCESS : EXIT_FAILURE;

}