From f2f1f2472c5efc541bd53f51289ad58a86fa2d41 Mon Sep 17 00:00:00 2001 From: Luke Shumaker Date: Sat, 20 May 2017 17:35:06 -0400 Subject: ./tools/notsd-move --- src/resolve/resolved-dns-stream.c | 418 -------------------------------------- 1 file changed, 418 deletions(-) delete mode 100644 src/resolve/resolved-dns-stream.c (limited to 'src/resolve/resolved-dns-stream.c') diff --git a/src/resolve/resolved-dns-stream.c b/src/resolve/resolved-dns-stream.c deleted file mode 100644 index 878bae47dc..0000000000 --- a/src/resolve/resolved-dns-stream.c +++ /dev/null @@ -1,418 +0,0 @@ -/*** - 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 . -***/ - -#include - -#include "alloc-util.h" -#include "fd-util.h" -#include "io-util.h" -#include "missing.h" -#include "resolved-dns-stream.h" - -#define DNS_STREAM_TIMEOUT_USEC (10 * USEC_PER_SEC) -#define DNS_STREAMS_MAX 128 - -static void dns_stream_stop(DnsStream *s) { - assert(s); - - s->io_event_source = sd_event_source_unref(s->io_event_source); - s->timeout_event_source = sd_event_source_unref(s->timeout_event_source); - s->fd = safe_close(s->fd); -} - -static int dns_stream_update_io(DnsStream *s) { - int f = 0; - - assert(s); - - if (s->write_packet && s->n_written < sizeof(s->write_size) + s->write_packet->size) - f |= EPOLLOUT; - if (!s->read_packet || s->n_read < sizeof(s->read_size) + s->read_packet->size) - f |= EPOLLIN; - - return sd_event_source_set_io_events(s->io_event_source, f); -} - -static int dns_stream_complete(DnsStream *s, int error) { - assert(s); - - dns_stream_stop(s); - - if (s->complete) - s->complete(s, error); - else /* the default action if no completion function is set is to close the stream */ - dns_stream_unref(s); - - return 0; -} - -static int dns_stream_identify(DnsStream *s) { - union { - struct cmsghdr header; /* For alignment */ - uint8_t buffer[CMSG_SPACE(MAXSIZE(struct in_pktinfo, struct in6_pktinfo)) - + EXTRA_CMSG_SPACE /* kernel appears to require extra space */]; - } control; - struct msghdr mh = {}; - struct cmsghdr *cmsg; - socklen_t sl; - int r; - - assert(s); - - if (s->identified) - return 0; - - /* Query the local side */ - s->local_salen = sizeof(s->local); - r = getsockname(s->fd, &s->local.sa, &s->local_salen); - if (r < 0) - return -errno; - if (s->local.sa.sa_family == AF_INET6 && s->ifindex <= 0) - s->ifindex = s->local.in6.sin6_scope_id; - - /* Query the remote side */ - s->peer_salen = sizeof(s->peer); - r = getpeername(s->fd, &s->peer.sa, &s->peer_salen); - if (r < 0) - return -errno; - if (s->peer.sa.sa_family == AF_INET6 && s->ifindex <= 0) - s->ifindex = s->peer.in6.sin6_scope_id; - - /* Check consistency */ - assert(s->peer.sa.sa_family == s->local.sa.sa_family); - assert(IN_SET(s->peer.sa.sa_family, AF_INET, AF_INET6)); - - /* Query connection meta information */ - sl = sizeof(control); - if (s->peer.sa.sa_family == AF_INET) { - r = getsockopt(s->fd, IPPROTO_IP, IP_PKTOPTIONS, &control, &sl); - if (r < 0) - return -errno; - } else if (s->peer.sa.sa_family == AF_INET6) { - - r = getsockopt(s->fd, IPPROTO_IPV6, IPV6_2292PKTOPTIONS, &control, &sl); - if (r < 0) - return -errno; - } else - return -EAFNOSUPPORT; - - mh.msg_control = &control; - mh.msg_controllen = sl; - - CMSG_FOREACH(cmsg, &mh) { - - if (cmsg->cmsg_level == IPPROTO_IPV6) { - assert(s->peer.sa.sa_family == AF_INET6); - - switch (cmsg->cmsg_type) { - - case IPV6_PKTINFO: { - struct in6_pktinfo *i = (struct in6_pktinfo*) CMSG_DATA(cmsg); - - if (s->ifindex <= 0) - s->ifindex = i->ipi6_ifindex; - break; - } - - case IPV6_HOPLIMIT: - s->ttl = *(int *) CMSG_DATA(cmsg); - break; - } - - } else if (cmsg->cmsg_level == IPPROTO_IP) { - assert(s->peer.sa.sa_family == AF_INET); - - switch (cmsg->cmsg_type) { - - case IP_PKTINFO: { - struct in_pktinfo *i = (struct in_pktinfo*) CMSG_DATA(cmsg); - - if (s->ifindex <= 0) - s->ifindex = i->ipi_ifindex; - break; - } - - case IP_TTL: - s->ttl = *(int *) CMSG_DATA(cmsg); - break; - } - } - } - - /* The Linux kernel sets the interface index to the loopback - * device if the connection came from the local host since it - * avoids the routing table in such a case. Let's unset the - * interface index in such a case. */ - if (s->ifindex == LOOPBACK_IFINDEX) - s->ifindex = 0; - - /* If we don't know the interface index still, we look for the - * first local interface with a matching address. Yuck! */ - if (s->ifindex <= 0) - s->ifindex = manager_find_ifindex(s->manager, s->local.sa.sa_family, s->local.sa.sa_family == AF_INET ? (union in_addr_union*) &s->local.in.sin_addr : (union in_addr_union*) &s->local.in6.sin6_addr); - - if (s->protocol == DNS_PROTOCOL_LLMNR && s->ifindex > 0) { - uint32_t ifindex = htobe32(s->ifindex); - - /* Make sure all packets for this connection are sent on the same interface */ - if (s->local.sa.sa_family == AF_INET) { - r = setsockopt(s->fd, IPPROTO_IP, IP_UNICAST_IF, &ifindex, sizeof(ifindex)); - if (r < 0) - log_debug_errno(errno, "Failed to invoke IP_UNICAST_IF: %m"); - } else if (s->local.sa.sa_family == AF_INET6) { - r = setsockopt(s->fd, IPPROTO_IPV6, IPV6_UNICAST_IF, &ifindex, sizeof(ifindex)); - if (r < 0) - log_debug_errno(errno, "Failed to invoke IPV6_UNICAST_IF: %m"); - } - } - - s->identified = true; - - return 0; -} - -static int on_stream_timeout(sd_event_source *es, usec_t usec, void *userdata) { - DnsStream *s = userdata; - - assert(s); - - return dns_stream_complete(s, ETIMEDOUT); -} - -static int on_stream_io(sd_event_source *es, int fd, uint32_t revents, void *userdata) { - DnsStream *s = userdata; - int r; - - assert(s); - - r = dns_stream_identify(s); - if (r < 0) - return dns_stream_complete(s, -r); - - if ((revents & EPOLLOUT) && - s->write_packet && - s->n_written < sizeof(s->write_size) + s->write_packet->size) { - - struct iovec iov[2]; - ssize_t ss; - - iov[0].iov_base = &s->write_size; - iov[0].iov_len = sizeof(s->write_size); - iov[1].iov_base = DNS_PACKET_DATA(s->write_packet); - iov[1].iov_len = s->write_packet->size; - - IOVEC_INCREMENT(iov, 2, s->n_written); - - ss = writev(fd, iov, 2); - if (ss < 0) { - if (errno != EINTR && errno != EAGAIN) - return dns_stream_complete(s, errno); - } else - s->n_written += ss; - - /* Are we done? If so, disable the event source for EPOLLOUT */ - if (s->n_written >= sizeof(s->write_size) + s->write_packet->size) { - r = dns_stream_update_io(s); - if (r < 0) - return dns_stream_complete(s, -r); - } - } - - if ((revents & (EPOLLIN|EPOLLHUP|EPOLLRDHUP)) && - (!s->read_packet || - s->n_read < sizeof(s->read_size) + s->read_packet->size)) { - - if (s->n_read < sizeof(s->read_size)) { - ssize_t ss; - - ss = read(fd, (uint8_t*) &s->read_size + s->n_read, sizeof(s->read_size) - s->n_read); - if (ss < 0) { - if (errno != EINTR && errno != EAGAIN) - return dns_stream_complete(s, errno); - } else if (ss == 0) - return dns_stream_complete(s, ECONNRESET); - else - s->n_read += ss; - } - - if (s->n_read >= sizeof(s->read_size)) { - - if (be16toh(s->read_size) < DNS_PACKET_HEADER_SIZE) - return dns_stream_complete(s, EBADMSG); - - if (s->n_read < sizeof(s->read_size) + be16toh(s->read_size)) { - ssize_t ss; - - if (!s->read_packet) { - r = dns_packet_new(&s->read_packet, s->protocol, be16toh(s->read_size)); - if (r < 0) - return dns_stream_complete(s, -r); - - s->read_packet->size = be16toh(s->read_size); - s->read_packet->ipproto = IPPROTO_TCP; - s->read_packet->family = s->peer.sa.sa_family; - s->read_packet->ttl = s->ttl; - s->read_packet->ifindex = s->ifindex; - - if (s->read_packet->family == AF_INET) { - s->read_packet->sender.in = s->peer.in.sin_addr; - s->read_packet->sender_port = be16toh(s->peer.in.sin_port); - s->read_packet->destination.in = s->local.in.sin_addr; - s->read_packet->destination_port = be16toh(s->local.in.sin_port); - } else { - assert(s->read_packet->family == AF_INET6); - s->read_packet->sender.in6 = s->peer.in6.sin6_addr; - s->read_packet->sender_port = be16toh(s->peer.in6.sin6_port); - s->read_packet->destination.in6 = s->local.in6.sin6_addr; - s->read_packet->destination_port = be16toh(s->local.in6.sin6_port); - - if (s->read_packet->ifindex == 0) - s->read_packet->ifindex = s->peer.in6.sin6_scope_id; - if (s->read_packet->ifindex == 0) - s->read_packet->ifindex = s->local.in6.sin6_scope_id; - } - } - - ss = read(fd, - (uint8_t*) DNS_PACKET_DATA(s->read_packet) + s->n_read - sizeof(s->read_size), - sizeof(s->read_size) + be16toh(s->read_size) - s->n_read); - if (ss < 0) { - if (errno != EINTR && errno != EAGAIN) - return dns_stream_complete(s, errno); - } else if (ss == 0) - return dns_stream_complete(s, ECONNRESET); - else - s->n_read += ss; - } - - /* Are we done? If so, disable the event source for EPOLLIN */ - if (s->n_read >= sizeof(s->read_size) + be16toh(s->read_size)) { - r = dns_stream_update_io(s); - if (r < 0) - return dns_stream_complete(s, -r); - - /* If there's a packet handler - * installed, call that. Note that - * this is optional... */ - if (s->on_packet) - return s->on_packet(s); - } - } - } - - if ((s->write_packet && s->n_written >= sizeof(s->write_size) + s->write_packet->size) && - (s->read_packet && s->n_read >= sizeof(s->read_size) + s->read_packet->size)) - return dns_stream_complete(s, 0); - - return 0; -} - -DnsStream *dns_stream_unref(DnsStream *s) { - if (!s) - return NULL; - - assert(s->n_ref > 0); - s->n_ref--; - - if (s->n_ref > 0) - return NULL; - - dns_stream_stop(s); - - if (s->manager) { - LIST_REMOVE(streams, s->manager->dns_streams, s); - s->manager->n_dns_streams--; - } - - dns_packet_unref(s->write_packet); - dns_packet_unref(s->read_packet); - - return mfree(s); -} - -DEFINE_TRIVIAL_CLEANUP_FUNC(DnsStream*, dns_stream_unref); - -DnsStream *dns_stream_ref(DnsStream *s) { - if (!s) - return NULL; - - assert(s->n_ref > 0); - s->n_ref++; - - return s; -} - -int dns_stream_new(Manager *m, DnsStream **ret, DnsProtocol protocol, int fd) { - _cleanup_(dns_stream_unrefp) DnsStream *s = NULL; - int r; - - assert(m); - assert(fd >= 0); - - if (m->n_dns_streams > DNS_STREAMS_MAX) - return -EBUSY; - - s = new0(DnsStream, 1); - if (!s) - return -ENOMEM; - - s->n_ref = 1; - s->fd = -1; - s->protocol = protocol; - - r = sd_event_add_io(m->event, &s->io_event_source, fd, EPOLLIN, on_stream_io, s); - if (r < 0) - return r; - - (void) sd_event_source_set_description(s->io_event_source, "dns-stream-io"); - - r = sd_event_add_time( - m->event, - &s->timeout_event_source, - clock_boottime_or_monotonic(), - now(clock_boottime_or_monotonic()) + DNS_STREAM_TIMEOUT_USEC, 0, - on_stream_timeout, s); - if (r < 0) - return r; - - (void) sd_event_source_set_description(s->timeout_event_source, "dns-stream-timeout"); - - LIST_PREPEND(streams, m->dns_streams, s); - s->manager = m; - s->fd = fd; - m->n_dns_streams++; - - *ret = s; - s = NULL; - - return 0; -} - -int dns_stream_write_packet(DnsStream *s, DnsPacket *p) { - assert(s); - - if (s->write_packet) - return -EBUSY; - - s->write_packet = dns_packet_ref(p); - s->write_size = htobe16(p->size); - s->n_written = 0; - - return dns_stream_update_io(s); -} -- cgit v1.2.3-54-g00ecf