diff options
Diffstat (limited to 'src/resolve-host')
| -rw-r--r-- | src/resolve-host/resolve-host.c | 149 |
1 files changed, 141 insertions, 8 deletions
diff --git a/src/resolve-host/resolve-host.c b/src/resolve-host/resolve-host.c index 122c2622cf..1b1edaf6ec 100644 --- a/src/resolve-host/resolve-host.c +++ b/src/resolve-host/resolve-host.c @@ -31,10 +31,14 @@ #include "af-list.h" #include "build.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 int resolve_host(sd_bus *bus, const char *name) { @@ -286,6 +290,103 @@ static int parse_address(const char *s, int *family, union in_addr_union *addres 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; + int r; + + 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); + + r = sd_bus_message_append(req, "sqq", name, arg_class, arg_type); + 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_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); + + r = sd_bus_message_exit_container(reply); + if (r < 0) + return bus_log_parse_error(r); + + if (n == 0) { + log_error("%s: no records found", name); + return -ESRCH; + } + + return 0; +} + static void help(void) { printf("%s [OPTIONS...]\n\n" "Resolve IPv4 or IPv6 addresses.\n\n" @@ -294,6 +395,8 @@ static void help(void) { " -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" , program_invocation_short_name); } @@ -305,15 +408,17 @@ 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' }, {} }; - 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:", options, NULL)) >= 0) { switch(c) { case 'h': @@ -337,7 +442,23 @@ static int parse_argv(int argc, char *argv[]) { arg_ifindex = if_nametoindex(optarg); if (arg_ifindex <= 0) { log_error("Unknown interfaces %s: %m", optarg); - return -EINVAL; + return -errno; + } + break; + + case 't': + r = dns_type_from_string(optarg, &arg_type); + if (r < 0) { + log_error("Failed to parse RR record type %s", optarg); + return r; + } + break; + + case 'c': + r = dns_class_from_string(optarg, &arg_class); + if (r < 0) { + log_error("Failed to parse RR record class %s", optarg); + return r; } break; @@ -349,6 +470,14 @@ static int parse_argv(int argc, char *argv[]) { } } + 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 */; } @@ -379,11 +508,15 @@ int main(int argc, char **argv) { int family, ifindex, k; union in_addr_union a; - 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 (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; |