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-rw-r--r--src/resolve/resolve-tool.c152
1 files changed, 107 insertions, 45 deletions
diff --git a/src/resolve/resolve-tool.c b/src/resolve/resolve-tool.c
index c1be03fbb2..a519074278 100644
--- a/src/resolve/resolve-tool.c
+++ b/src/resolve/resolve-tool.c
@@ -44,6 +44,14 @@ static uint16_t arg_class = 0;
static bool arg_legend = true;
static uint64_t arg_flags = 0;
+typedef enum RawType {
+ RAW_NONE,
+ RAW_PAYLOAD,
+ RAW_PACKET,
+} RawType;
+
+static RawType arg_raw = RAW_NONE;
+
static enum {
MODE_RESOLVE_HOST,
MODE_RESOLVE_RECORD,
@@ -331,6 +339,50 @@ static int parse_address(const char *s, int *family, union in_addr_union *addres
return 0;
}
+static int output_rr_packet(const void *d, size_t l, int ifindex) {
+ _cleanup_(dns_resource_record_unrefp) DnsResourceRecord *rr = NULL;
+ _cleanup_(dns_packet_unrefp) DnsPacket *p = NULL;
+ int r;
+ char ifname[IF_NAMESIZE] = "";
+
+ 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)
+ return log_error_errno(r, "Failed to parse RR: %m");
+
+ if (arg_raw == RAW_PAYLOAD) {
+ void *data;
+ ssize_t k;
+
+ k = dns_resource_record_payload(rr, &data);
+ if (k < 0)
+ return log_error_errno(k, "Cannot dump RR: %m");
+ fwrite(data, 1, k, stdout);
+ } else {
+ const char *s;
+
+ s = dns_resource_record_to_string(rr);
+ if (!s)
+ return log_oom();
+
+ 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);
+ }
+
+ return 0;
+}
+
static int resolve_record(sd_bus *bus, const char *name, uint16_t class, uint16_t type) {
_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;
@@ -377,9 +429,6 @@ static int resolve_record(sd_bus *bus, const char *name, uint16_t class, uint16_
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;
- const char *s;
uint16_t c, t;
int ifindex;
const void *d;
@@ -399,29 +448,16 @@ static int resolve_record(sd_bus *bus, const char *name, uint16_t class, uint16_
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;
+ if (arg_raw == RAW_PACKET) {
+ uint64_t u64 = htole64(l);
- 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)
- return log_error_errno(r, "Failed to parse RR: %m");
-
- s = dns_resource_record_to_string(rr);
- if (!s)
- return log_oom();
-
- 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);
+ fwrite(&u64, sizeof(u64), 1, stdout);
+ fwrite(d, 1, l, stdout);
+ } else {
+ r = output_rr_packet(d, l, ifindex);
+ if (r < 0)
+ return r;
+ }
if (dns_type_needs_authentication(t))
needs_authentication = true;
@@ -976,27 +1012,33 @@ static void help_dns_classes(void) {
}
static void help(void) {
- printf("%s [OPTIONS...] NAME...\n"
- "%s [OPTIONS...] --service [[NAME] TYPE] DOMAIN\n\n"
+ printf("%1$s [OPTIONS...] HOSTNAME|ADDRESS...\n"
+ "%1$s [OPTIONS...] --service [[NAME] TYPE] DOMAIN\n"
+ "%1$s [OPTIONS...] --openpgp EMAIL@DOMAIN...\n"
+ "%1$s [OPTIONS...] --statistics\n"
+ "%1$s [OPTIONS...] --reset-statistics\n"
+ "\n"
"Resolve domain names, IPv4 and IPv6 addresses, DNS 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=INTERFACE Look on interface\n"
- " -p --protocol=PROTOCOL|help Look via protocol\n"
- " -t --type=TYPE|help Query RR with DNS type\n"
- " -c --class=CLASS|help 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"
- " --openpgp Query OpenPGP public key\n"
- " --cname=BOOL Do [not] follow CNAME redirects\n"
- " --search=BOOL Do [not] use search domains\n"
- " --legend=BOOL Do [not] print column headers and meta information\n"
- " --statistics Show resolver statistics\n"
- " --reset-statistics Reset resolver statistics\n"
- , program_invocation_short_name, 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=INTERFACE Look on interface\n"
+ " -p --protocol=PROTO|help Look via protocol\n"
+ " -t --type=TYPE|help Query RR with DNS type\n"
+ " -c --class=CLASS|help Query RR with DNS class\n"
+ " --service Resolve service (SRV)\n"
+ " --service-address=BOOL Resolve address for services (default: yes)\n"
+ " --service-txt=BOOL Resolve TXT records for services (default: yes)\n"
+ " --openpgp Query OpenPGP public key\n"
+ " --cname=BOOL Follow CNAME redirects (default: yes)\n"
+ " --search=BOOL Use search domains for single-label names\n"
+ " (default: yes)\n"
+ " --raw[=payload|packet] Dump the answer as binary data\n"
+ " --legend=BOOL Print headers and additional info (default: yes)\n"
+ " --statistics Show resolver statistics\n"
+ " --reset-statistics Reset resolver statistics\n"
+ , program_invocation_short_name);
}
static int parse_argv(int argc, char *argv[]) {
@@ -1008,6 +1050,7 @@ static int parse_argv(int argc, char *argv[]) {
ARG_SERVICE_ADDRESS,
ARG_SERVICE_TXT,
ARG_OPENPGP,
+ ARG_RAW,
ARG_SEARCH,
ARG_STATISTICS,
ARG_RESET_STATISTICS,
@@ -1026,6 +1069,7 @@ static int parse_argv(int argc, char *argv[]) {
{ "service-address", required_argument, NULL, ARG_SERVICE_ADDRESS },
{ "service-txt", required_argument, NULL, ARG_SERVICE_TXT },
{ "openpgp", no_argument, NULL, ARG_OPENPGP },
+ { "raw", optional_argument, NULL, ARG_RAW },
{ "search", required_argument, NULL, ARG_SEARCH },
{ "statistics", no_argument, NULL, ARG_STATISTICS, },
{ "reset-statistics", no_argument, NULL, ARG_RESET_STATISTICS },
@@ -1139,6 +1183,24 @@ static int parse_argv(int argc, char *argv[]) {
arg_mode = MODE_RESOLVE_OPENPGP;
break;
+ case ARG_RAW:
+ if (on_tty()) {
+ log_error("Refusing to write binary data to tty.");
+ return -ENOTTY;
+ }
+
+ if (optarg == NULL || streq(optarg, "payload"))
+ arg_raw = RAW_PAYLOAD;
+ else if (streq(optarg, "packet"))
+ arg_raw = RAW_PACKET;
+ else {
+ log_error("Unknown --raw specifier \"%s\".", optarg);
+ return -EINVAL;
+ }
+
+ arg_legend = false;
+ break;
+
case ARG_CNAME:
r = parse_boolean(optarg);
if (r < 0)
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-10 05:29:50 +0000