resolved: move LLMNR related functions into separate file

1 files changed, 1 insertions, 447 deletions

diff --git a/src/resolve/resolved-manager.c b/src/resolve/resolved-manager.c
index dee5e61922..6785a2e3c7 100644
--- a/src/resolve/resolved-manager.c
+++ b/src/resolve/resolved-manager.c
@@ -38,6 +38,7 @@
 #include "resolved-conf.h"
 #include "resolved-bus.h"
 #include "resolved-manager.h"
+#include "resolved-llmnr.h"
 
 #define SEND_TIMEOUT_USEC (200 * USEC_PER_MSEC)
 
@@ -393,66 +394,6 @@ static int manager_watch_hostname(Manager *m) {
         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;
@@ -1316,393 +1257,6 @@ uint32_t manager_find_mtu(Manager *m) {
         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;