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-rw-r--r--agents/virt/client/mcast.c393
1 files changed, 393 insertions, 0 deletions
diff --git a/agents/virt/client/mcast.c b/agents/virt/client/mcast.c
new file mode 100644
index 0000000..42f0a6b
--- /dev/null
+++ b/agents/virt/client/mcast.c
@@ -0,0 +1,393 @@
+/*
+ Copyright Red Hat, Inc. 2006-2017
+
+ This program is free software; you can redistribute it and/or modify it
+ under the terms of the GNU General Public License as published by the
+ Free Software Foundation; either version 2, or (at your option) any
+ later version.
+
+ This program 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
+ General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; see the file COPYING. If not, write to the
+ Free Software Foundation, Inc., 675 Mass Ave, Cambridge,
+ MA 02139, USA.
+*/
+/*
+ * Author: Lon Hohberger <lhh at redhat.com>
+ */
+#include "config.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <signal.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/wait.h>
+#include <sys/un.h>
+#include <sys/socket.h>
+#include <sys/select.h>
+#include <sys/ioctl.h>
+#include <arpa/inet.h>
+#include <net/if.h>
+#include <netinet/in.h>
+#include <netdb.h>
+#include <sys/time.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <pthread.h>
+#include <libgen.h>
+#include <nss.h>
+
+/* Local includes */
+#include "xvm.h"
+#include "ip_lookup.h"
+#include "simple_auth.h"
+#include "options.h"
+#include "tcp.h"
+#include "mcast.h"
+#include "debug.h"
+#include "fdops.h"
+#include "client.h"
+
+
+static int
+tcp_wait_connect(int lfd, int retry_tenths)
+{
+ int fd;
+ fd_set rfds;
+ int n;
+ struct timeval tv;
+
+ dbg_printf(3, "Waiting for connection from XVM host daemon.\n");
+ FD_ZERO(&rfds);
+ FD_SET(lfd, &rfds);
+ tv.tv_sec = retry_tenths / 10;
+ tv.tv_usec = (retry_tenths % 10) * 100000;
+
+ n = select(lfd + 1, &rfds, NULL, NULL, &tv);
+ if (n == 0) {
+ errno = ETIMEDOUT;
+ return -1;
+ } else if (n < 0) {
+ return -1;
+ }
+
+ fd = accept(lfd, NULL, 0);
+ if (fd < 0)
+ return -1;
+
+ return fd;
+}
+
+
+void
+do_read_hostlist(int fd, int timeout)
+{
+ host_state_t hinfo;
+ fd_set rfds;
+ struct timeval tv;
+ int ret;
+
+ do {
+ FD_ZERO(&rfds);
+ FD_SET(fd, &rfds);
+ tv.tv_sec = timeout;
+ tv.tv_usec = 0;
+
+ ret = _select_retry(fd+1, &rfds, NULL, NULL, &tv);
+ if (ret == 0) {
+ printf("Timed out!\n");
+ break;
+ }
+
+ ret = _read_retry(fd, &hinfo, sizeof(hinfo), &tv);
+ if (ret < sizeof(hinfo)) {
+ printf("Bad read!\n");
+ break;
+ }
+
+ if (strlen((char *)hinfo.uuid) == 0 &&
+ strlen((char *)hinfo.domain) == 0)
+ break;
+
+ printf("%-32s %s %s\n", hinfo.domain, hinfo.uuid,
+ (hinfo.state == 1) ? "on" : "off");
+ } while (1);
+}
+
+
+static int
+tcp_exchange(int fd, fence_auth_type_t auth, void *key,
+ size_t key_len, int timeout)
+{
+ fd_set rfds;
+ struct timeval tv;
+ char ret = 1;
+
+ /* Ok, we're connected */
+ dbg_printf(3, "Issuing TCP challenge\n");
+ if (sock_challenge(fd, auth, key, key_len, timeout) <= 0) {
+ /* Challenge failed */
+ printf("Invalid response to challenge\n");
+ return 1;
+ }
+
+ /* Now they'll send us one, so we need to respond here */
+ dbg_printf(3, "Responding to TCP challenge\n");
+ if (sock_response(fd, auth, key, key_len, timeout) <= 0) {
+ printf("Invalid response to challenge\n");
+ return 1;
+ }
+
+ dbg_printf(2, "TCP Exchange + Authentication done... \n");
+
+ FD_ZERO(&rfds);
+ FD_SET(fd, &rfds);
+ tv.tv_sec = timeout;
+ tv.tv_usec = 0;
+
+ ret = 1;
+ dbg_printf(3, "Waiting for return value from XVM host\n");
+ if (_select_retry(fd + 1, &rfds, NULL, NULL, &tv) <= 0)
+ return -1;
+
+ /* Read return code */
+ if (_read_retry(fd, &ret, 1, &tv) < 0)
+ ret = 1;
+
+ if (ret == (char)RESP_HOSTLIST) /* hostlist */ {
+ do_read_hostlist(fd, timeout);
+ ret = 0;
+ }
+
+ return ret;
+}
+
+
+static int
+send_multicast_packets(ip_list_t *ipl, fence_virt_args_t *args,
+ uint32_t seqno, void *key, size_t key_len)
+{
+ fence_req_t freq;
+ int mc_sock;
+ ip_addr_t *ipa;
+ struct sockaddr_in tgt4;
+ struct sockaddr_in6 tgt6;
+ struct sockaddr *tgt;
+ socklen_t tgt_len;
+
+ for (ipa = ipl->tqh_first; ipa; ipa = ipa->ipa_entries.tqe_next) {
+
+ if (ipa->ipa_family != args->net.family) {
+ dbg_printf(2, "Ignoring %s: wrong family\n", ipa->ipa_address);
+ continue;
+ }
+
+ if (args->net.family == PF_INET) {
+ mc_sock = ipv4_send_sk(ipa->ipa_address, args->net.addr,
+ args->net.port,
+ (struct sockaddr *)&tgt4,
+ sizeof(struct sockaddr_in));
+ tgt = (struct sockaddr *)&tgt4;
+ tgt_len = sizeof(tgt4);
+ } else if (args->net.family == PF_INET6) {
+ mc_sock = ipv6_send_sk(ipa->ipa_address, args->net.addr,
+ args->net.port,
+ (struct sockaddr *)&tgt6,
+ sizeof(struct sockaddr_in6));
+ tgt = (struct sockaddr *)&tgt6;
+ tgt_len = sizeof(tgt6);
+ } else {
+ dbg_printf(2, "Unsupported family %d\n", args->net.family);
+ return -1;
+ }
+
+ if (mc_sock < 0)
+ continue;
+
+ /* Build our packet */
+ memset(&freq, 0, sizeof(freq));
+ if (args->domain && strlen((char *)args->domain)) {
+ strncpy((char *)freq.domain, args->domain,
+ sizeof(freq.domain) - 1);
+ }
+ freq.request = args->op;
+ freq.hashtype = args->net.hash;
+ freq.seqno = seqno;
+
+ /* Store source address */
+ if (ipa->ipa_family == PF_INET) {
+ freq.addrlen = sizeof(struct in_addr);
+ /* XXX Swap order for in_addr ? XXX */
+ if (inet_pton(PF_INET, ipa->ipa_address, freq.address) != 1) {
+ dbg_printf(2, "Unable to convert address\n");
+ close(mc_sock);
+ return -1;
+ }
+ } else if (ipa->ipa_family == PF_INET6) {
+ freq.addrlen = sizeof(struct in6_addr);
+ if (inet_pton(PF_INET6, ipa->ipa_address, freq.address) != 1) {
+ dbg_printf(2, "Unable to convert address\n");
+ close(mc_sock);
+ return -1;
+ }
+ }
+
+ freq.flags = 0;
+ if (args->flags & F_USE_UUID)
+ freq.flags |= RF_UUID;
+ freq.family = ipa->ipa_family;
+ freq.port = args->net.port;
+
+ sign_request(&freq, key, key_len);
+
+ dbg_printf(3, "Sending to %s via %s\n", args->net.addr,
+ ipa->ipa_address);
+
+ if(sendto(mc_sock, &freq, sizeof(freq), 0,
+ (struct sockaddr *)tgt, tgt_len) < 0) {
+ dbg_printf(3, "Unable to send packet to %s via %s\n",
+ args->net.addr, ipa->ipa_address);
+ }
+
+ close(mc_sock);
+ }
+
+ return 0;
+}
+
+
+/* TODO: Clean this up!!! */
+int
+mcast_fence_virt(fence_virt_args_t *args)
+{
+ ip_list_t ipl;
+ char key[MAX_KEY_LEN];
+ struct timeval tv;
+ int lfd = -1, key_len = 0, fd, ret;
+ int attempts = 0;
+ uint32_t seqno;
+
+ /* Initialize NSS; required to do hashing, as silly as that
+ sounds... */
+ if (NSS_NoDB_Init(NULL) != SECSuccess) {
+ printf("Could not initialize NSS\n");
+ return 1;
+ }
+
+ if (args->net.auth != AUTH_NONE || args->net.hash != HASH_NONE) {
+ key_len = read_key_file(args->net.key_file, key, sizeof(key));
+ if (key_len < 0) {
+ printf("Could not read %s; trying without "
+ "authentication\n", args->net.key_file);
+ args->net.auth = AUTH_NONE;
+ args->net.hash = HASH_NONE;
+ key_len = 0;
+ }
+ }
+
+ /* Do the real work */
+ if (ip_build_list(&ipl) < 0) {
+ printf("Error building IP address list\n");
+ return 1;
+ }
+
+ attempts = args->timeout * 10 / args->retr_time;
+
+ listen_loop:
+ do {
+ switch (args->net.auth) {
+ case AUTH_NONE:
+ case AUTH_SHA1:
+ case AUTH_SHA256:
+ case AUTH_SHA512:
+ if (args->net.family == PF_INET) {
+ lfd = ipv4_listen(NULL, args->net.port, 10);
+ } else {
+ lfd = ipv6_listen(NULL, args->net.port, 10);
+ }
+ break;
+ /*case AUTH_X509:*/
+ /* XXX Setup SSL listener socket here */
+ default:
+ return 1;
+ }
+
+ if (lfd < 0) {
+ printf("Failed to listen: %s\n", strerror(errno));
+ usleep(args->retr_time * 100000);
+ if (--attempts > 0)
+ goto listen_loop;
+ }
+ } while (0);
+
+ if (lfd < 0)
+ return -1;
+
+ gettimeofday(&tv, NULL);
+ seqno = (uint32_t)tv.tv_usec;
+
+ do {
+ if (send_multicast_packets(&ipl, args, seqno,
+ key, key_len)) {
+ close(lfd);
+ return -1;
+ }
+
+ switch (args->net.auth) {
+ case AUTH_NONE:
+ case AUTH_SHA1:
+ case AUTH_SHA256:
+ case AUTH_SHA512:
+ fd = tcp_wait_connect(lfd, args->retr_time);
+ if (fd < 0 && (errno == ETIMEDOUT ||
+ errno == EINTR))
+ continue;
+ break;
+ /* case AUTH_X509:
+ ... = ssl_wait_connect... */
+ break;
+ default:
+ close(lfd);
+ return 1;
+ }
+
+ break;
+ } while (--attempts);
+
+ if (lfd >= 0)
+ close(lfd);
+
+ if (fd < 0) {
+ if (attempts <= 0) {
+ printf("Timed out waiting for response\n");
+ return 1;
+ }
+ printf("Operation failed: %s\n", strerror(errno));
+ return -1;
+ }
+
+ switch (args->net.auth) {
+ case AUTH_NONE:
+ case AUTH_SHA1:
+ case AUTH_SHA256:
+ case AUTH_SHA512:
+ ret = tcp_exchange(fd, args->net.auth, key, key_len,
+ args->timeout);
+ break;
+ /* case AUTH_X509:
+ return ssl_exchange(...); */
+ default:
+ ret = 1;
+ break;
+ }
+
+ close(fd);
+ return ret;
+}
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