#include "af-list.h"
#include "build.h"
+#include "resolved-dns-packet.h"
+#include "resolved-def.h"
+
#define DNS_CALL_TIMEOUT_USEC (45*USEC_PER_SEC)
static int arg_family = AF_UNSPEC;
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" : "");
-static int resolve_host(sd_bus *bus, const char *name, int _family, int _ifindex) {
+ 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) {
_cleanup_bus_message_unref_ sd_bus_message *req = NULL, *reply = NULL;
_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);
- log_debug("Resolving %s (family %s)",
- name, af_to_name(_family));
+ log_debug("Resolving %s (family %s, ifindex %i).", name, af_to_name(arg_family) ?: "*", arg_ifindex);
r = sd_bus_message_new_method_call(
bus,
"/org/freedesktop/resolve1",
"org.freedesktop.resolve1.Manager",
"ResolveHostname");
- if (r < 0) {
- log_error("sd_bus_message_new_method_call: %s", strerror(-r));
- return r;
- }
+ if (r < 0)
+ return bus_log_create_error(r);
r = sd_bus_message_set_auto_start(req, false);
- if (r < 0) {
- log_error("sd_bus_message_set_auto_start: %s", strerror(-r));
- return r;
- }
+ if (r < 0)
+ return bus_log_create_error(r);
- r = sd_bus_message_append(req, "si", name, AF_UNSPEC);
- if (r < 0) {
- log_error("sd_bus_message_append: %s", strerror(-r));
- return r;
- }
+ r = sd_bus_message_append(req, "isit", arg_ifindex, name, arg_family, arg_flags);
+ if (r < 0)
+ return bus_log_create_error(r);
r = sd_bus_call(bus, req, DNS_CALL_TIMEOUT_USEC, &error, &reply);
if (r < 0) {
return r;
}
- r = sd_bus_message_enter_container(reply, 'a', "(iayi)");
- if (r < 0) {
- log_error("%s: failed to parse reply: %s", name, bus_error_message(&error, r));
- 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', "(iay)");
+ if (r < 0)
+ return bus_log_parse_error(r);
- while ((r = sd_bus_message_enter_container(reply, 'r', "iayi")) > 0) {
+ 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] = "";
r = sd_bus_message_read(reply, "i", &family);
- if (r < 0) {
- log_error("Cannot parse message, aborting.");
- return -EBADMSG;
- }
+ if (r < 0)
+ return bus_log_parse_error(r);
r = sd_bus_message_read_array(reply, 'y', &a, &sz);
- if (r < 0) {
- log_error("Cannot parse message, aborting.");
- return -EBADMSG;
- }
-
- r = sd_bus_message_read(reply, "i", &ifindex);
- if (r < 0) {
- log_error("Cannot parse message, aborting.");
- return -EBADMSG;
- }
+ if (r < 0)
+ return bus_log_parse_error(r);
r = sd_bus_message_exit_container(reply);
- if (r < 0) {
- log_error("Cannot parse message, aborting.");
- return -EBADMSG;
- }
+ if (r < 0)
+ return bus_log_parse_error(r);
- if ((_family != AF_UNSPEC && family != _family) ||
- !IN_SET(family, AF_INET, AF_INET6)) {
- log_debug("%s: skipping entry with family %hu (%s)",
- name, family, af_to_name(family) ?: "unknown");
+ 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;
}
continue;
}
- if (ifindex < 0) {
- log_error("%s: systemd-resolved returned invalid interface index %i",
- name, ifindex);
- continue;
- }
-
if (ifindex > 0) {
char *t;
}
}
- if (_ifindex > 0 && ifindex > 0 && ifindex != _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));
continue;
}
- log_info("%*s%s %s%s%.*s",
- (int) strlen(name), c == 0 ? name : "", c == 0 ? ":" : " ",
- pretty,
- *ifname ? "%" : "", (int) sizeof(ifname), *ifname ? ifname: "");
+ 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 -ENONET;
+ return -ESRCH;
+ }
+
+ print_source(ifindex, flags);
+
+ return 0;
+}
+
+static int resolve_address(sd_bus *bus, int family, const union in_addr_union *address, int ifindex) {
+ _cleanup_bus_message_unref_ sd_bus_message *req = NULL, *reply = NULL;
+ _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;
+
+ assert(bus);
+ assert(IN_SET(family, AF_INET, AF_INET6));
+ assert(address);
+
+ r = in_addr_to_string(family, address, &pretty);
+ if (r < 0)
+ return log_oom();
+
+ if (ifindex > 0) {
+ char *t;
+
+ t = if_indextoname(ifindex, ifname);
+ if (!t) {
+ log_error("Failed to resolve interface name for index %i", ifindex);
+ return -errno;
+ }
+ }
+
+ 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_set_auto_start(req, false);
+ 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);
+
+ 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;
+ }
+
+ 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);
+
+ while ((r = sd_bus_message_read(reply, "s", &n)) > 0) {
+
+ printf("%*s%s%s%s %s\n",
+ (int) strlen(pretty), c == 0 ? pretty : "",
+ isempty(ifname) ? "" : "%", 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(ifindex, flags);
+
+ 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) {
+ r = safe_atoi(percent+1, &ifi);
+ if (r < 0 || 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_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;
+ uint64_t flags;
+ int r, ifindex;
+
+ assert(name);
+
+ log_debug("Resolving %s %s %s.", name, dns_class_to_string(arg_class), dns_type_to_string(arg_type));
+
+ 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_set_auto_start(req, false);
+ if (r < 0)
+ return bus_log_create_error(r);
+
+ assert((uint16_t) arg_type == 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);
+
+ 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;
+ }
+
+ 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);
+
+ while ((r = sd_bus_message_enter_container(reply, 'r', "qqay")) > 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;
+ const void *d;
+ size_t l;
+
+ r = sd_bus_message_read(reply, "qq", &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();
+
+ r = dns_packet_append_blob(p, d, l, NULL);
+ if (r < 0)
+ return log_oom();
+
+ r = dns_packet_read_rr(p, &rr, 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;
+ }
+
+ printf("%s\n", s);
+ n++;
}
+ if (r < 0)
+ return bus_log_parse_error(r);
- return sd_bus_message_exit_container(reply);
+ 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(ifindex, flags);
+
+ return 0;
+}
+
+static void help_dns_types(void) {
+ int i;
+ const char *t;
+
+ if (arg_legend)
+ puts("Known dns 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 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...]\n\n"
"Resolve IPv4 or IPv6 addresses.\n\n"
- "Options:\n"
- " -4 Resolve IPv4 addresses\n"
- " -6 Resolve IPv6 addresses\n"
- " -i INTERFACE Filter by interface\n"
- " -h --help Show this help and exit\n"
- " --version Print version string and exit\n"
- , program_invocation_short_name
- );
+ " -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"
+ " --legend[=BOOL] Do [not] print column headers\n"
+ , program_invocation_short_name);
}
static int parse_argv(int argc, char *argv[]) {
enum {
ARG_VERSION = 0x100,
+ ARG_LEGEND,
};
static const struct option options[] = {
- { "help", no_argument, NULL, 'h' },
- { "version", no_argument, NULL, ARG_VERSION },
+ { "help", no_argument, NULL, 'h' },
+ { "version", no_argument, NULL, ARG_VERSION },
+ { "type", required_argument, NULL, 't' },
+ { "class", required_argument, NULL, 'c' },
+ { "legend", optional_argument, NULL, ARG_LEGEND },
+ { "protocol", required_argument, NULL, 'p' },
{}
};
- int c;
+ int c, r;
assert(argc >= 0);
assert(argv);
- while ((c = getopt_long(argc, argv, "h46i:", options, NULL)) >= 0)
+ while ((c = getopt_long(argc, argv, "h46i:t:c:p:", options, NULL)) >= 0)
switch(c) {
case 'h':
arg_ifindex = if_nametoindex(optarg);
if (arg_ifindex <= 0) {
log_error("Unknown interfaces %s: %m", optarg);
+ return -errno;
+ }
+ break;
+
+ case 't':
+ if (streq(optarg, "help")) {
+ help_dns_types();
+ return 0;
+ }
+
+ arg_type = dns_type_from_string(optarg);
+ if (arg_type < 0) {
+ log_error("Failed to parse RR record type %s", optarg);
+ return arg_type;
+ }
+ assert(arg_type > 0 && (uint16_t) arg_type == arg_type);
+
+ break;
+
+ case 'c':
+ if (streq(optarg, "help")) {
+ help_dns_classes();
+ return 0;
+ }
+
+ r = dns_class_from_string(optarg, &arg_class);
+ if (r < 0) {
+ log_error("Failed to parse RR record class %s", optarg);
+ return r;
+ }
+
+ break;
+
+ case ARG_LEGEND:
+ if (optarg) {
+ r = parse_boolean(optarg);
+ if (r < 0) {
+ log_error("Failed to parse --legend= argument");
+ return r;
+ }
+
+ arg_legend = !!r;
+ } else
+ 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 '?':
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_class == 0)
+ arg_class = DNS_CLASS_IN;
+
return 1 /* work to do */;
}
-
int main(int argc, char **argv) {
- _cleanup_bus_unref_ sd_bus *bus = NULL;
+ _cleanup_bus_close_unref_ sd_bus *bus = NULL;
int r;
log_parse_environment();
r = parse_argv(argc, argv);
if (r <= 0)
- goto end;
+ 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("sd_bus_open_system: %s", strerror(-r));
- goto end;
+ goto finish;
}
while (argv[optind]) {
- int k;
+ 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]);
+ }
- k = resolve_host(bus, argv[optind++], arg_family, arg_ifindex);
if (r == 0)
r = k;
+
+ optind++;
}
- end:
+finish:
return r == 0 ? EXIT_SUCCESS : EXIT_FAILURE;
}
~ianmdlvl / elogind.git / blobdiff