src/resolve/resolved-bus.h \
src/resolve/resolved-link.h \
src/resolve/resolved-link.c \
+ src/resolve/resolved-llmnr.h \
+ src/resolve/resolved-llmnr.c \
src/resolve/resolved-def.h \
src/resolve/resolved-dns-rr.h \
src/resolve/resolved-dns-rr.c \
#include "random-util.h"
#include "hostname-util.h"
#include "dns-domain.h"
+#include "resolved-llmnr.h"
#include "resolved-dns-scope.h"
#define MULTICAST_RATELIMIT_INTERVAL_USEC (1*USEC_PER_SEC)
--- /dev/null
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+ This file is part of systemd.
+
+ Copyright 2014 Tom Gundersen <teg@jklm.no>
+
+ 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/>.
+ ***/
+
+#include <resolv.h>
+#include <netinet/in.h>
+
+#include "resolved-manager.h"
+#include "resolved-llmnr.h"
+
+void manager_llmnr_stop(Manager *m) {
+ assert(m);
+
+ m->llmnr_ipv4_udp_event_source = sd_event_source_unref(m->llmnr_ipv4_udp_event_source);
+ m->llmnr_ipv4_udp_fd = safe_close(m->llmnr_ipv4_udp_fd);
+
+ m->llmnr_ipv6_udp_event_source = sd_event_source_unref(m->llmnr_ipv6_udp_event_source);
+ m->llmnr_ipv6_udp_fd = safe_close(m->llmnr_ipv6_udp_fd);
+
+ m->llmnr_ipv4_tcp_event_source = sd_event_source_unref(m->llmnr_ipv4_tcp_event_source);
+ m->llmnr_ipv4_tcp_fd = safe_close(m->llmnr_ipv4_tcp_fd);
+
+ m->llmnr_ipv6_tcp_event_source = sd_event_source_unref(m->llmnr_ipv6_tcp_event_source);
+ m->llmnr_ipv6_tcp_fd = safe_close(m->llmnr_ipv6_tcp_fd);
+}
+
+int manager_llmnr_start(Manager *m) {
+ int r;
+
+ assert(m);
+
+ if (m->llmnr_support == SUPPORT_NO)
+ return 0;
+
+ r = manager_llmnr_ipv4_udp_fd(m);
+ if (r == -EADDRINUSE)
+ goto eaddrinuse;
+ if (r < 0)
+ return r;
+
+ r = manager_llmnr_ipv4_tcp_fd(m);
+ if (r == -EADDRINUSE)
+ goto eaddrinuse;
+ if (r < 0)
+ return r;
+
+ if (socket_ipv6_is_supported()) {
+ r = manager_llmnr_ipv6_udp_fd(m);
+ if (r == -EADDRINUSE)
+ goto eaddrinuse;
+ if (r < 0)
+ return r;
+
+ r = manager_llmnr_ipv6_tcp_fd(m);
+ if (r == -EADDRINUSE)
+ goto eaddrinuse;
+ if (r < 0)
+ return r;
+ }
+
+ return 0;
+
+eaddrinuse:
+ log_warning("There appears to be another LLMNR responder running. Turning off LLMNR support.");
+ m->llmnr_support = SUPPORT_NO;
+ manager_llmnr_stop(m);
+
+ return 0;
+}
+
+static int on_llmnr_packet(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
+ _cleanup_(dns_packet_unrefp) DnsPacket *p = NULL;
+ DnsTransaction *t = NULL;
+ Manager *m = userdata;
+ DnsScope *scope;
+ int r;
+
+ r = manager_recv(m, fd, DNS_PROTOCOL_LLMNR, &p);
+ if (r <= 0)
+ return r;
+
+ scope = manager_find_scope(m, p);
+ if (!scope) {
+ log_warning("Got LLMNR UDP packet on unknown scope. Ignoring.");
+ return 0;
+ }
+
+ if (dns_packet_validate_reply(p) > 0) {
+ log_debug("Got LLMNR reply packet for id %u", DNS_PACKET_ID(p));
+
+ dns_scope_check_conflicts(scope, p);
+
+ t = hashmap_get(m->dns_transactions, UINT_TO_PTR(DNS_PACKET_ID(p)));
+ if (t)
+ dns_transaction_process_reply(t, p);
+
+ } else if (dns_packet_validate_query(p) > 0) {
+ log_debug("Got LLMNR query packet for id %u", DNS_PACKET_ID(p));
+
+ dns_scope_process_query(scope, NULL, p);
+ } else
+ log_debug("Invalid LLMNR UDP packet.");
+
+ return 0;
+}
+
+int manager_llmnr_ipv4_udp_fd(Manager *m) {
+ union sockaddr_union sa = {
+ .in.sin_family = AF_INET,
+ .in.sin_port = htobe16(5355),
+ };
+ static const int one = 1, pmtu = IP_PMTUDISC_DONT, ttl = 255;
+ int r;
+
+ assert(m);
+
+ if (m->llmnr_ipv4_udp_fd >= 0)
+ return m->llmnr_ipv4_udp_fd;
+
+ m->llmnr_ipv4_udp_fd = socket(AF_INET, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
+ if (m->llmnr_ipv4_udp_fd < 0)
+ return -errno;
+
+ /* RFC 4795, section 2.5 recommends setting the TTL of UDP packets to 255. */
+ r = setsockopt(m->llmnr_ipv4_udp_fd, IPPROTO_IP, IP_TTL, &ttl, sizeof(ttl));
+ if (r < 0) {
+ r = -errno;
+ goto fail;
+ }
+
+ r = setsockopt(m->llmnr_ipv4_udp_fd, IPPROTO_IP, IP_MULTICAST_TTL, &ttl, sizeof(ttl));
+ if (r < 0) {
+ r = -errno;
+ goto fail;
+ }
+
+ r = setsockopt(m->llmnr_ipv4_udp_fd, IPPROTO_IP, IP_MULTICAST_LOOP, &one, sizeof(one));
+ if (r < 0) {
+ r = -errno;
+ goto fail;
+ }
+
+ r = setsockopt(m->llmnr_ipv4_udp_fd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one));
+ if (r < 0) {
+ r = -errno;
+ goto fail;
+ }
+
+ r = setsockopt(m->llmnr_ipv4_udp_fd, IPPROTO_IP, IP_PKTINFO, &one, sizeof(one));
+ if (r < 0) {
+ r = -errno;
+ goto fail;
+ }
+
+ r = setsockopt(m->llmnr_ipv4_udp_fd, IPPROTO_IP, IP_RECVTTL, &one, sizeof(one));
+ if (r < 0) {
+ r = -errno;
+ goto fail;
+ }
+
+ /* Disable Don't-Fragment bit in the IP header */
+ r = setsockopt(m->llmnr_ipv4_udp_fd, IPPROTO_IP, IP_MTU_DISCOVER, &pmtu, sizeof(pmtu));
+ if (r < 0) {
+ r = -errno;
+ goto fail;
+ }
+
+ r = bind(m->llmnr_ipv4_udp_fd, &sa.sa, sizeof(sa.in));
+ if (r < 0) {
+ r = -errno;
+ goto fail;
+ }
+
+ r = sd_event_add_io(m->event, &m->llmnr_ipv4_udp_event_source, m->llmnr_ipv4_udp_fd, EPOLLIN, on_llmnr_packet, m);
+ if (r < 0)
+ goto fail;
+
+ return m->llmnr_ipv4_udp_fd;
+
+fail:
+ m->llmnr_ipv4_udp_fd = safe_close(m->llmnr_ipv4_udp_fd);
+ return r;
+}
+
+int manager_llmnr_ipv6_udp_fd(Manager *m) {
+ union sockaddr_union sa = {
+ .in6.sin6_family = AF_INET6,
+ .in6.sin6_port = htobe16(5355),
+ };
+ static const int one = 1, ttl = 255;
+ int r;
+
+ assert(m);
+
+ if (m->llmnr_ipv6_udp_fd >= 0)
+ return m->llmnr_ipv6_udp_fd;
+
+ m->llmnr_ipv6_udp_fd = socket(AF_INET6, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
+ if (m->llmnr_ipv6_udp_fd < 0)
+ return -errno;
+
+ r = setsockopt(m->llmnr_ipv6_udp_fd, IPPROTO_IPV6, IPV6_UNICAST_HOPS, &ttl, sizeof(ttl));
+ if (r < 0) {
+ r = -errno;
+ goto fail;
+ }
+
+ /* RFC 4795, section 2.5 recommends setting the TTL of UDP packets to 255. */
+ r = setsockopt(m->llmnr_ipv6_udp_fd, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, &ttl, sizeof(ttl));
+ if (r < 0) {
+ r = -errno;
+ goto fail;
+ }
+
+ r = setsockopt(m->llmnr_ipv6_udp_fd, IPPROTO_IPV6, IPV6_MULTICAST_LOOP, &one, sizeof(one));
+ if (r < 0) {
+ r = -errno;
+ goto fail;
+ }
+
+ r = setsockopt(m->llmnr_ipv6_udp_fd, IPPROTO_IPV6, IPV6_V6ONLY, &one, sizeof(one));
+ if (r < 0) {
+ r = -errno;
+ goto fail;
+ }
+
+ r = setsockopt(m->llmnr_ipv6_udp_fd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one));
+ if (r < 0) {
+ r = -errno;
+ goto fail;
+ }
+
+ r = setsockopt(m->llmnr_ipv6_udp_fd, IPPROTO_IPV6, IPV6_RECVPKTINFO, &one, sizeof(one));
+ if (r < 0) {
+ r = -errno;
+ goto fail;
+ }
+
+ r = setsockopt(m->llmnr_ipv6_udp_fd, IPPROTO_IPV6, IPV6_RECVHOPLIMIT, &one, sizeof(one));
+ if (r < 0) {
+ r = -errno;
+ goto fail;
+ }
+
+ r = bind(m->llmnr_ipv6_udp_fd, &sa.sa, sizeof(sa.in6));
+ if (r < 0) {
+ r = -errno;
+ goto fail;
+ }
+
+ r = sd_event_add_io(m->event, &m->llmnr_ipv6_udp_event_source, m->llmnr_ipv6_udp_fd, EPOLLIN, on_llmnr_packet, m);
+ if (r < 0) {
+ r = -errno;
+ goto fail;
+ }
+
+ return m->llmnr_ipv6_udp_fd;
+
+fail:
+ m->llmnr_ipv6_udp_fd = safe_close(m->llmnr_ipv6_udp_fd);
+ return r;
+}
+
+static int on_llmnr_stream_packet(DnsStream *s) {
+ DnsScope *scope;
+
+ assert(s);
+
+ scope = manager_find_scope(s->manager, s->read_packet);
+ if (!scope) {
+ log_warning("Got LLMNR TCP packet on unknown scope. Ignroing.");
+ return 0;
+ }
+
+ if (dns_packet_validate_query(s->read_packet) > 0) {
+ log_debug("Got query packet for id %u", DNS_PACKET_ID(s->read_packet));
+
+ dns_scope_process_query(scope, s, s->read_packet);
+
+ /* If no reply packet was set, we free the stream */
+ if (s->write_packet)
+ return 0;
+ } else
+ log_debug("Invalid LLMNR TCP packet.");
+
+ dns_stream_free(s);
+ return 0;
+}
+
+static int on_llmnr_stream(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
+ DnsStream *stream;
+ Manager *m = userdata;
+ int cfd, r;
+
+ cfd = accept4(fd, NULL, NULL, SOCK_NONBLOCK|SOCK_CLOEXEC);
+ if (cfd < 0) {
+ if (errno == EAGAIN || errno == EINTR)
+ return 0;
+
+ return -errno;
+ }
+
+ r = dns_stream_new(m, &stream, DNS_PROTOCOL_LLMNR, cfd);
+ if (r < 0) {
+ safe_close(cfd);
+ return r;
+ }
+
+ stream->on_packet = on_llmnr_stream_packet;
+ return 0;
+}
+
+int manager_llmnr_ipv4_tcp_fd(Manager *m) {
+ union sockaddr_union sa = {
+ .in.sin_family = AF_INET,
+ .in.sin_port = htobe16(5355),
+ };
+ static const int one = 1, pmtu = IP_PMTUDISC_DONT;
+ int r;
+
+ assert(m);
+
+ if (m->llmnr_ipv4_tcp_fd >= 0)
+ return m->llmnr_ipv4_tcp_fd;
+
+ m->llmnr_ipv4_tcp_fd = socket(AF_INET, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
+ if (m->llmnr_ipv4_tcp_fd < 0)
+ return -errno;
+
+ /* RFC 4795, section 2.5. requires setting the TTL of TCP streams to 1 */
+ r = setsockopt(m->llmnr_ipv4_tcp_fd, IPPROTO_IP, IP_TTL, &one, sizeof(one));
+ if (r < 0) {
+ r = -errno;
+ goto fail;
+ }
+
+ r = setsockopt(m->llmnr_ipv4_tcp_fd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one));
+ if (r < 0) {
+ r = -errno;
+ goto fail;
+ }
+
+ r = setsockopt(m->llmnr_ipv4_tcp_fd, IPPROTO_IP, IP_PKTINFO, &one, sizeof(one));
+ if (r < 0) {
+ r = -errno;
+ goto fail;
+ }
+
+ r = setsockopt(m->llmnr_ipv4_tcp_fd, IPPROTO_IP, IP_RECVTTL, &one, sizeof(one));
+ if (r < 0) {
+ r = -errno;
+ goto fail;
+ }
+
+ /* Disable Don't-Fragment bit in the IP header */
+ r = setsockopt(m->llmnr_ipv4_tcp_fd, IPPROTO_IP, IP_MTU_DISCOVER, &pmtu, sizeof(pmtu));
+ if (r < 0) {
+ r = -errno;
+ goto fail;
+ }
+
+ r = bind(m->llmnr_ipv4_tcp_fd, &sa.sa, sizeof(sa.in));
+ if (r < 0) {
+ r = -errno;
+ goto fail;
+ }
+
+ r = listen(m->llmnr_ipv4_tcp_fd, SOMAXCONN);
+ if (r < 0) {
+ r = -errno;
+ goto fail;
+ }
+
+ r = sd_event_add_io(m->event, &m->llmnr_ipv4_tcp_event_source, m->llmnr_ipv4_tcp_fd, EPOLLIN, on_llmnr_stream, m);
+ if (r < 0)
+ goto fail;
+
+ return m->llmnr_ipv4_tcp_fd;
+
+fail:
+ m->llmnr_ipv4_tcp_fd = safe_close(m->llmnr_ipv4_tcp_fd);
+ return r;
+}
+
+int manager_llmnr_ipv6_tcp_fd(Manager *m) {
+ union sockaddr_union sa = {
+ .in6.sin6_family = AF_INET6,
+ .in6.sin6_port = htobe16(5355),
+ };
+ static const int one = 1;
+ int r;
+
+ assert(m);
+
+ if (m->llmnr_ipv6_tcp_fd >= 0)
+ return m->llmnr_ipv6_tcp_fd;
+
+ m->llmnr_ipv6_tcp_fd = socket(AF_INET6, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
+ if (m->llmnr_ipv6_tcp_fd < 0)
+ return -errno;
+
+ /* RFC 4795, section 2.5. requires setting the TTL of TCP streams to 1 */
+ r = setsockopt(m->llmnr_ipv6_tcp_fd, IPPROTO_IPV6, IPV6_UNICAST_HOPS, &one, sizeof(one));
+ if (r < 0) {
+ r = -errno;
+ goto fail;
+ }
+
+ r = setsockopt(m->llmnr_ipv6_tcp_fd, IPPROTO_IPV6, IPV6_V6ONLY, &one, sizeof(one));
+ if (r < 0) {
+ r = -errno;
+ goto fail;
+ }
+
+ r = setsockopt(m->llmnr_ipv6_tcp_fd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one));
+ if (r < 0) {
+ r = -errno;
+ goto fail;
+ }
+
+ r = setsockopt(m->llmnr_ipv6_tcp_fd, IPPROTO_IPV6, IPV6_RECVPKTINFO, &one, sizeof(one));
+ if (r < 0) {
+ r = -errno;
+ goto fail;
+ }
+
+ r = setsockopt(m->llmnr_ipv6_tcp_fd, IPPROTO_IPV6, IPV6_RECVHOPLIMIT, &one, sizeof(one));
+ if (r < 0) {
+ r = -errno;
+ goto fail;
+ }
+
+ r = bind(m->llmnr_ipv6_tcp_fd, &sa.sa, sizeof(sa.in6));
+ if (r < 0) {
+ r = -errno;
+ goto fail;
+ }
+
+ r = listen(m->llmnr_ipv6_tcp_fd, SOMAXCONN);
+ if (r < 0) {
+ r = -errno;
+ goto fail;
+ }
+
+ r = sd_event_add_io(m->event, &m->llmnr_ipv6_tcp_event_source, m->llmnr_ipv6_tcp_fd, EPOLLIN, on_llmnr_stream, m);
+ if (r < 0) {
+ r = -errno;
+ goto fail;
+ }
+
+ return m->llmnr_ipv6_tcp_fd;
+
+fail:
+ m->llmnr_ipv6_tcp_fd = safe_close(m->llmnr_ipv6_tcp_fd);
+ return r;
+}
--- /dev/null
+/*-*- 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/>.
+***/
+
+#include "resolved-manager.h"
+
+int manager_llmnr_ipv4_udp_fd(Manager *m);
+int manager_llmnr_ipv6_udp_fd(Manager *m);
+int manager_llmnr_ipv4_tcp_fd(Manager *m);
+int manager_llmnr_ipv6_tcp_fd(Manager *m);
+
+void manager_llmnr_stop(Manager *m);
+int manager_llmnr_start(Manager *m);
#include "resolved-conf.h"
#include "resolved-bus.h"
#include "resolved-manager.h"
+#include "resolved-llmnr.h"
#define SEND_TIMEOUT_USEC (200 * USEC_PER_MSEC)
return 0;
}
-static void manager_llmnr_stop(Manager *m) {
- assert(m);
-
- m->llmnr_ipv4_udp_event_source = sd_event_source_unref(m->llmnr_ipv4_udp_event_source);
- m->llmnr_ipv4_udp_fd = safe_close(m->llmnr_ipv4_udp_fd);
-
- m->llmnr_ipv6_udp_event_source = sd_event_source_unref(m->llmnr_ipv6_udp_event_source);
- m->llmnr_ipv6_udp_fd = safe_close(m->llmnr_ipv6_udp_fd);
-
- m->llmnr_ipv4_tcp_event_source = sd_event_source_unref(m->llmnr_ipv4_tcp_event_source);
- m->llmnr_ipv4_tcp_fd = safe_close(m->llmnr_ipv4_tcp_fd);
-
- m->llmnr_ipv6_tcp_event_source = sd_event_source_unref(m->llmnr_ipv6_tcp_event_source);
- m->llmnr_ipv6_tcp_fd = safe_close(m->llmnr_ipv6_tcp_fd);
-}
-
-static int manager_llmnr_start(Manager *m) {
- int r;
-
- assert(m);
-
- if (m->llmnr_support == SUPPORT_NO)
- return 0;
-
- r = manager_llmnr_ipv4_udp_fd(m);
- if (r == -EADDRINUSE)
- goto eaddrinuse;
- if (r < 0)
- return r;
-
- r = manager_llmnr_ipv4_tcp_fd(m);
- if (r == -EADDRINUSE)
- goto eaddrinuse;
- if (r < 0)
- return r;
-
- if (socket_ipv6_is_supported()) {
- r = manager_llmnr_ipv6_udp_fd(m);
- if (r == -EADDRINUSE)
- goto eaddrinuse;
- if (r < 0)
- return r;
-
- r = manager_llmnr_ipv6_tcp_fd(m);
- if (r == -EADDRINUSE)
- goto eaddrinuse;
- if (r < 0)
- return r;
- }
-
- return 0;
-
-eaddrinuse:
- log_warning("There appears to be another LLMNR responder running. Turning off LLMNR support.");
- m->llmnr_support = SUPPORT_NO;
- manager_llmnr_stop(m);
-
- return 0;
-}
-
int manager_new(Manager **ret) {
_cleanup_(manager_freep) Manager *m = NULL;
int r;
return mtu;
}
-static int on_llmnr_packet(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
- _cleanup_(dns_packet_unrefp) DnsPacket *p = NULL;
- DnsTransaction *t = NULL;
- Manager *m = userdata;
- DnsScope *scope;
- int r;
-
- r = manager_recv(m, fd, DNS_PROTOCOL_LLMNR, &p);
- if (r <= 0)
- return r;
-
- scope = manager_find_scope(m, p);
- if (!scope) {
- log_warning("Got LLMNR UDP packet on unknown scope. Ignoring.");
- return 0;
- }
-
- if (dns_packet_validate_reply(p) > 0) {
- log_debug("Got reply packet for id %u", DNS_PACKET_ID(p));
-
- dns_scope_check_conflicts(scope, p);
-
- t = hashmap_get(m->dns_transactions, UINT_TO_PTR(DNS_PACKET_ID(p)));
- if (t)
- dns_transaction_process_reply(t, p);
-
- } else if (dns_packet_validate_query(p) > 0) {
- log_debug("Got query packet for id %u", DNS_PACKET_ID(p));
-
- dns_scope_process_query(scope, NULL, p);
- } else
- log_debug("Invalid LLMNR UDP packet.");
-
- return 0;
-}
-
-int manager_llmnr_ipv4_udp_fd(Manager *m) {
- union sockaddr_union sa = {
- .in.sin_family = AF_INET,
- .in.sin_port = htobe16(5355),
- };
- static const int one = 1, pmtu = IP_PMTUDISC_DONT, ttl = 255;
- int r;
-
- assert(m);
-
- if (m->llmnr_ipv4_udp_fd >= 0)
- return m->llmnr_ipv4_udp_fd;
-
- m->llmnr_ipv4_udp_fd = socket(AF_INET, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
- if (m->llmnr_ipv4_udp_fd < 0)
- return -errno;
-
- /* RFC 4795, section 2.5 recommends setting the TTL of UDP packets to 255. */
- r = setsockopt(m->llmnr_ipv4_udp_fd, IPPROTO_IP, IP_TTL, &ttl, sizeof(ttl));
- if (r < 0) {
- r = -errno;
- goto fail;
- }
-
- r = setsockopt(m->llmnr_ipv4_udp_fd, IPPROTO_IP, IP_MULTICAST_TTL, &ttl, sizeof(ttl));
- if (r < 0) {
- r = -errno;
- goto fail;
- }
-
- r = setsockopt(m->llmnr_ipv4_udp_fd, IPPROTO_IP, IP_MULTICAST_LOOP, &one, sizeof(one));
- if (r < 0) {
- r = -errno;
- goto fail;
- }
-
- r = setsockopt(m->llmnr_ipv4_udp_fd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one));
- if (r < 0) {
- r = -errno;
- goto fail;
- }
-
- r = setsockopt(m->llmnr_ipv4_udp_fd, IPPROTO_IP, IP_PKTINFO, &one, sizeof(one));
- if (r < 0) {
- r = -errno;
- goto fail;
- }
-
- r = setsockopt(m->llmnr_ipv4_udp_fd, IPPROTO_IP, IP_RECVTTL, &one, sizeof(one));
- if (r < 0) {
- r = -errno;
- goto fail;
- }
-
- /* Disable Don't-Fragment bit in the IP header */
- r = setsockopt(m->llmnr_ipv4_udp_fd, IPPROTO_IP, IP_MTU_DISCOVER, &pmtu, sizeof(pmtu));
- if (r < 0) {
- r = -errno;
- goto fail;
- }
-
- r = bind(m->llmnr_ipv4_udp_fd, &sa.sa, sizeof(sa.in));
- if (r < 0) {
- r = -errno;
- goto fail;
- }
-
- r = sd_event_add_io(m->event, &m->llmnr_ipv4_udp_event_source, m->llmnr_ipv4_udp_fd, EPOLLIN, on_llmnr_packet, m);
- if (r < 0)
- goto fail;
-
- return m->llmnr_ipv4_udp_fd;
-
-fail:
- m->llmnr_ipv4_udp_fd = safe_close(m->llmnr_ipv4_udp_fd);
- return r;
-}
-
-int manager_llmnr_ipv6_udp_fd(Manager *m) {
- union sockaddr_union sa = {
- .in6.sin6_family = AF_INET6,
- .in6.sin6_port = htobe16(5355),
- };
- static const int one = 1, ttl = 255;
- int r;
-
- assert(m);
-
- if (m->llmnr_ipv6_udp_fd >= 0)
- return m->llmnr_ipv6_udp_fd;
-
- m->llmnr_ipv6_udp_fd = socket(AF_INET6, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
- if (m->llmnr_ipv6_udp_fd < 0)
- return -errno;
-
- r = setsockopt(m->llmnr_ipv6_udp_fd, IPPROTO_IPV6, IPV6_UNICAST_HOPS, &ttl, sizeof(ttl));
- if (r < 0) {
- r = -errno;
- goto fail;
- }
-
- /* RFC 4795, section 2.5 recommends setting the TTL of UDP packets to 255. */
- r = setsockopt(m->llmnr_ipv6_udp_fd, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, &ttl, sizeof(ttl));
- if (r < 0) {
- r = -errno;
- goto fail;
- }
-
- r = setsockopt(m->llmnr_ipv6_udp_fd, IPPROTO_IPV6, IPV6_MULTICAST_LOOP, &one, sizeof(one));
- if (r < 0) {
- r = -errno;
- goto fail;
- }
-
- r = setsockopt(m->llmnr_ipv6_udp_fd, IPPROTO_IPV6, IPV6_V6ONLY, &one, sizeof(one));
- if (r < 0) {
- r = -errno;
- goto fail;
- }
-
- r = setsockopt(m->llmnr_ipv6_udp_fd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one));
- if (r < 0) {
- r = -errno;
- goto fail;
- }
-
- r = setsockopt(m->llmnr_ipv6_udp_fd, IPPROTO_IPV6, IPV6_RECVPKTINFO, &one, sizeof(one));
- if (r < 0) {
- r = -errno;
- goto fail;
- }
-
- r = setsockopt(m->llmnr_ipv6_udp_fd, IPPROTO_IPV6, IPV6_RECVHOPLIMIT, &one, sizeof(one));
- if (r < 0) {
- r = -errno;
- goto fail;
- }
-
- r = bind(m->llmnr_ipv6_udp_fd, &sa.sa, sizeof(sa.in6));
- if (r < 0) {
- r = -errno;
- goto fail;
- }
-
- r = sd_event_add_io(m->event, &m->llmnr_ipv6_udp_event_source, m->llmnr_ipv6_udp_fd, EPOLLIN, on_llmnr_packet, m);
- if (r < 0) {
- r = -errno;
- goto fail;
- }
-
- return m->llmnr_ipv6_udp_fd;
-
-fail:
- m->llmnr_ipv6_udp_fd = safe_close(m->llmnr_ipv6_udp_fd);
- return r;
-}
-
-static int on_llmnr_stream_packet(DnsStream *s) {
- DnsScope *scope;
-
- assert(s);
-
- scope = manager_find_scope(s->manager, s->read_packet);
- if (!scope) {
- log_warning("Got LLMNR TCP packet on unknown scope. Ignroing.");
- return 0;
- }
-
- if (dns_packet_validate_query(s->read_packet) > 0) {
- log_debug("Got query packet for id %u", DNS_PACKET_ID(s->read_packet));
-
- dns_scope_process_query(scope, s, s->read_packet);
-
- /* If no reply packet was set, we free the stream */
- if (s->write_packet)
- return 0;
- } else
- log_debug("Invalid LLMNR TCP packet.");
-
- dns_stream_free(s);
- return 0;
-}
-
-static int on_llmnr_stream(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
- DnsStream *stream;
- Manager *m = userdata;
- int cfd, r;
-
- cfd = accept4(fd, NULL, NULL, SOCK_NONBLOCK|SOCK_CLOEXEC);
- if (cfd < 0) {
- if (errno == EAGAIN || errno == EINTR)
- return 0;
-
- return -errno;
- }
-
- r = dns_stream_new(m, &stream, DNS_PROTOCOL_LLMNR, cfd);
- if (r < 0) {
- safe_close(cfd);
- return r;
- }
-
- stream->on_packet = on_llmnr_stream_packet;
- return 0;
-}
-
-int manager_llmnr_ipv4_tcp_fd(Manager *m) {
- union sockaddr_union sa = {
- .in.sin_family = AF_INET,
- .in.sin_port = htobe16(5355),
- };
- static const int one = 1, pmtu = IP_PMTUDISC_DONT;
- int r;
-
- assert(m);
-
- if (m->llmnr_ipv4_tcp_fd >= 0)
- return m->llmnr_ipv4_tcp_fd;
-
- m->llmnr_ipv4_tcp_fd = socket(AF_INET, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
- if (m->llmnr_ipv4_tcp_fd < 0)
- return -errno;
-
- /* RFC 4795, section 2.5. requires setting the TTL of TCP streams to 1 */
- r = setsockopt(m->llmnr_ipv4_tcp_fd, IPPROTO_IP, IP_TTL, &one, sizeof(one));
- if (r < 0) {
- r = -errno;
- goto fail;
- }
-
- r = setsockopt(m->llmnr_ipv4_tcp_fd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one));
- if (r < 0) {
- r = -errno;
- goto fail;
- }
-
- r = setsockopt(m->llmnr_ipv4_tcp_fd, IPPROTO_IP, IP_PKTINFO, &one, sizeof(one));
- if (r < 0) {
- r = -errno;
- goto fail;
- }
-
- r = setsockopt(m->llmnr_ipv4_tcp_fd, IPPROTO_IP, IP_RECVTTL, &one, sizeof(one));
- if (r < 0) {
- r = -errno;
- goto fail;
- }
-
- /* Disable Don't-Fragment bit in the IP header */
- r = setsockopt(m->llmnr_ipv4_tcp_fd, IPPROTO_IP, IP_MTU_DISCOVER, &pmtu, sizeof(pmtu));
- if (r < 0) {
- r = -errno;
- goto fail;
- }
-
- r = bind(m->llmnr_ipv4_tcp_fd, &sa.sa, sizeof(sa.in));
- if (r < 0) {
- r = -errno;
- goto fail;
- }
-
- r = listen(m->llmnr_ipv4_tcp_fd, SOMAXCONN);
- if (r < 0) {
- r = -errno;
- goto fail;
- }
-
- r = sd_event_add_io(m->event, &m->llmnr_ipv4_tcp_event_source, m->llmnr_ipv4_tcp_fd, EPOLLIN, on_llmnr_stream, m);
- if (r < 0)
- goto fail;
-
- return m->llmnr_ipv4_tcp_fd;
-
-fail:
- m->llmnr_ipv4_tcp_fd = safe_close(m->llmnr_ipv4_tcp_fd);
- return r;
-}
-
-int manager_llmnr_ipv6_tcp_fd(Manager *m) {
- union sockaddr_union sa = {
- .in6.sin6_family = AF_INET6,
- .in6.sin6_port = htobe16(5355),
- };
- static const int one = 1;
- int r;
-
- assert(m);
-
- if (m->llmnr_ipv6_tcp_fd >= 0)
- return m->llmnr_ipv6_tcp_fd;
-
- m->llmnr_ipv6_tcp_fd = socket(AF_INET6, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
- if (m->llmnr_ipv6_tcp_fd < 0)
- return -errno;
-
- /* RFC 4795, section 2.5. requires setting the TTL of TCP streams to 1 */
- r = setsockopt(m->llmnr_ipv6_tcp_fd, IPPROTO_IPV6, IPV6_UNICAST_HOPS, &one, sizeof(one));
- if (r < 0) {
- r = -errno;
- goto fail;
- }
-
- r = setsockopt(m->llmnr_ipv6_tcp_fd, IPPROTO_IPV6, IPV6_V6ONLY, &one, sizeof(one));
- if (r < 0) {
- r = -errno;
- goto fail;
- }
-
- r = setsockopt(m->llmnr_ipv6_tcp_fd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one));
- if (r < 0) {
- r = -errno;
- goto fail;
- }
-
- r = setsockopt(m->llmnr_ipv6_tcp_fd, IPPROTO_IPV6, IPV6_RECVPKTINFO, &one, sizeof(one));
- if (r < 0) {
- r = -errno;
- goto fail;
- }
-
- r = setsockopt(m->llmnr_ipv6_tcp_fd, IPPROTO_IPV6, IPV6_RECVHOPLIMIT, &one, sizeof(one));
- if (r < 0) {
- r = -errno;
- goto fail;
- }
-
- r = bind(m->llmnr_ipv6_tcp_fd, &sa.sa, sizeof(sa.in6));
- if (r < 0) {
- r = -errno;
- goto fail;
- }
-
- r = listen(m->llmnr_ipv6_tcp_fd, SOMAXCONN);
- if (r < 0) {
- r = -errno;
- goto fail;
- }
-
- r = sd_event_add_io(m->event, &m->llmnr_ipv6_tcp_event_source, m->llmnr_ipv6_tcp_fd, EPOLLIN, on_llmnr_stream, m);
- if (r < 0) {
- r = -errno;
- goto fail;
- }
-
- return m->llmnr_ipv6_tcp_fd;
-
-fail:
- m->llmnr_ipv6_tcp_fd = safe_close(m->llmnr_ipv6_tcp_fd);
- return r;
-}
-
int manager_find_ifindex(Manager *m, int family, const union in_addr_union *in_addr) {
LinkAddress *a;
int manager_dns_ipv4_fd(Manager *m);
int manager_dns_ipv6_fd(Manager *m);
-int manager_llmnr_ipv4_udp_fd(Manager *m);
-int manager_llmnr_ipv6_udp_fd(Manager *m);
-int manager_llmnr_ipv4_tcp_fd(Manager *m);
-int manager_llmnr_ipv6_tcp_fd(Manager *m);
int manager_find_ifindex(Manager *m, int family, const union in_addr_union *in_addr);
LinkAddress* manager_find_link_address(Manager *m, int family, const union in_addr_union *in_addr);
projects / platform / upstream / systemd.git / commitdiff