Adding upstream version 3.4.upstream/3.4upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 3290 insertions, 0 deletions

diff --git a/client.c b/client.c
new file mode 100644
index 0000000..029860c
--- /dev/null
+++ b/client.c
@@ -0,0 +1,3290 @@
+/*
+  chronyd/chronyc - Programs for keeping computer clocks accurate.
+
+ **********************************************************************
+ * Copyright (C) Richard P. Curnow  1997-2003
+ * Copyright (C) Lonnie Abelbeck  2016, 2018
+ * Copyright (C) Miroslav Lichvar  2009-2018
+ * 
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ * 
+ * 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; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ * 
+ **********************************************************************
+
+  =======================================================================
+
+  Command line client for configuring the daemon and obtaining status
+  from it whilst running.
+  */
+
+#include "config.h"
+
+#include "sysincl.h"
+
+#include "array.h"
+#include "candm.h"
+#include "logging.h"
+#include "memory.h"
+#include "nameserv.h"
+#include "getdate.h"
+#include "cmdparse.h"
+#include "pktlength.h"
+#include "util.h"
+
+#ifdef FEAT_READLINE
+#ifdef USE_EDITLINE
+#include <editline/readline.h>
+#else
+#include <readline/readline.h>
+#include <readline/history.h>
+#endif
+#endif
+
+/* ================================================== */
+
+union sockaddr_all {
+  struct sockaddr_in in4;
+#ifdef FEAT_IPV6
+  struct sockaddr_in6 in6;
+#endif
+  struct sockaddr_un un;
+  struct sockaddr sa;
+};
+
+static ARR_Instance sockaddrs;
+
+static int sock_fd = -1;
+
+static int quit = 0;
+
+static int on_terminal = 0;
+
+static int no_dns = 0;
+
+static int csv_mode = 0;
+
+/* ================================================== */
+/* Log a message. This is a minimalistic replacement of the logging.c
+   implementation to avoid linking with it and other modules. */
+
+int log_debug_enabled = 0;
+
+void LOG_Message(LOG_Severity severity,
+#if DEBUG > 0
+                 int line_number, const char *filename, const char *function_name,
+#endif
+                 const char *format, ...)
+{
+  va_list ap;
+
+  va_start(ap, format);
+  vfprintf(stderr, format, ap);
+  putc('\n', stderr);
+  va_end(ap);
+}
+
+/* ================================================== */
+/* Read a single line of commands from standard input */
+
+#ifdef FEAT_READLINE
+static char **command_name_completion(const char *text, int start, int end);
+#endif
+
+static char *
+read_line(void)
+{
+  static char line[2048];
+  static const char *prompt = "chronyc> ";
+
+  if (on_terminal) {
+#ifdef FEAT_READLINE
+    char *cmd;
+
+    rl_attempted_completion_function = command_name_completion;
+    rl_basic_word_break_characters = " \t\n\r";
+
+    /* save line only if not empty */
+    cmd = readline(prompt);
+    if( cmd == NULL ) return( NULL );
+    
+    /* user pressed return */
+    if( *cmd != '\0' ) {
+      strncpy(line, cmd, sizeof(line) - 1);
+      line[sizeof(line) - 1] = '\0';
+      add_history(cmd);
+      /* free the buffer allocated by readline */
+      Free(cmd);
+    } else {
+      /* simulate the user has entered an empty line */
+      *line = '\0';
+    }
+    return( line );
+#else
+    printf("%s", prompt);
+    fflush(stdout);
+#endif
+  }
+  if (fgets(line, sizeof(line), stdin)) {
+    return line;
+  } else {
+    return NULL;
+  }
+  
+}
+
+/* ================================================== */
+
+static ARR_Instance
+get_sockaddrs(const char *hostnames, int port)
+{
+  ARR_Instance addrs;
+  char *hostname, *s1, *s2;
+  IPAddr ip_addrs[DNS_MAX_ADDRESSES];
+  union sockaddr_all *addr;
+  int i;
+
+  addrs = ARR_CreateInstance(sizeof (union sockaddr_all));
+  s1 = Strdup(hostnames);
+
+  /* Parse the comma-separated list of hostnames */
+  for (hostname = s1; hostname && *hostname; hostname = s2) {
+    s2 = strchr(hostname, ',');
+    if (s2)
+      *s2++ = '\0';
+
+    /* hostname starting with / is considered a path of Unix domain socket */
+    if (hostname[0] == '/') {
+      addr = (union sockaddr_all *)ARR_GetNewElement(addrs);
+      if (snprintf(addr->un.sun_path, sizeof (addr->un.sun_path), "%s", hostname) >=
+          sizeof (addr->un.sun_path))
+        LOG_FATAL("Unix socket path too long");
+      addr->un.sun_family = AF_UNIX;
+    } else {
+      if (DNS_Name2IPAddress(hostname, ip_addrs, DNS_MAX_ADDRESSES) != DNS_Success) {
+        DEBUG_LOG("Could not get IP address for %s", hostname);
+        continue;
+      }
+
+      for (i = 0; i < DNS_MAX_ADDRESSES && ip_addrs[i].family != IPADDR_UNSPEC; i++) {
+        addr = (union sockaddr_all *)ARR_GetNewElement(addrs);
+        UTI_IPAndPortToSockaddr(&ip_addrs[i], port, (struct sockaddr *)addr);
+        DEBUG_LOG("Resolved %s to %s", hostname, UTI_IPToString(&ip_addrs[i]));
+      }
+    }
+  }
+
+  Free(s1);
+  return addrs;
+}
+
+/* ================================================== */
+/* Initialise the socket used to talk to the daemon */
+
+static int
+prepare_socket(union sockaddr_all *addr)
+{
+  socklen_t addr_len;
+  char *dir;
+
+  switch (addr->sa.sa_family) {
+    case AF_UNIX:
+      addr_len = sizeof (addr->un);
+      break;
+    case AF_INET:
+      addr_len = sizeof (addr->in4);
+      break;
+#ifdef FEAT_IPV6
+    case AF_INET6:
+      addr_len = sizeof (addr->in6);
+      break;
+#endif
+    default:
+      assert(0);
+  }
+
+  sock_fd = socket(addr->sa.sa_family, SOCK_DGRAM, 0);
+
+  if (sock_fd < 0) {
+    DEBUG_LOG("Could not create socket : %s", strerror(errno));
+    return 0;
+  }
+
+  if (addr->sa.sa_family == AF_UNIX) {
+    struct sockaddr_un sa_un;
+
+    /* Construct path of our socket.  Use the same directory as the server
+       socket and include our process ID to allow multiple chronyc instances
+       running at the same time. */
+    dir = UTI_PathToDir(addr->un.sun_path);
+    if (snprintf(sa_un.sun_path, sizeof (sa_un.sun_path),
+                 "%s/chronyc.%d.sock", dir, (int)getpid()) >= sizeof (sa_un.sun_path))
+      LOG_FATAL("Unix socket path too long");
+    Free(dir);
+
+    sa_un.sun_family = AF_UNIX;
+    unlink(sa_un.sun_path);
+
+    /* Bind the socket to the path */
+    if (bind(sock_fd, (struct sockaddr *)&sa_un, sizeof (sa_un)) < 0) {
+      DEBUG_LOG("Could not bind socket : %s", strerror(errno));
+      return 0;
+    }
+
+    /* Allow server without root privileges to send replies to our socket */
+    if (chmod(sa_un.sun_path, 0666) < 0) {
+      DEBUG_LOG("Could not change socket permissions : %s", strerror(errno));
+      return 0;
+    }
+  }
+
+  if (connect(sock_fd, &addr->sa, addr_len) < 0) {
+    DEBUG_LOG("Could not connect socket : %s", strerror(errno));
+    return 0;
+  }
+
+  return 1;
+}
+
+/* ================================================== */
+
+static void
+close_io(void)
+{
+  union sockaddr_all addr;
+  socklen_t addr_len = sizeof (addr);
+
+  if (sock_fd < 0)
+    return;
+
+  /* Remove our Unix domain socket */
+  if (getsockname(sock_fd, &addr.sa, &addr_len) < 0)
+    LOG_FATAL("getsockname() failed : %s", strerror(errno));
+  if (addr_len <= sizeof (addr) && addr_len > sizeof (addr.sa.sa_family) &&
+      addr.sa.sa_family == AF_UNIX)
+    unlink(addr.un.sun_path);
+
+  close(sock_fd);
+  sock_fd = -1;
+}
+
+/* ================================================== */
+
+static int
+open_io(void)
+{
+  static unsigned int address_index = 0;
+  union sockaddr_all *addr;
+
+  /* If a socket is already opened, close it and try the next address */
+  if (sock_fd >= 0) {
+    close_io();
+    address_index++;
+  }
+
+  /* Find an address for which a socket can be opened and connected */
+  for (; address_index < ARR_GetSize(sockaddrs); address_index++) {
+    addr = (union sockaddr_all *)ARR_GetElement(sockaddrs, address_index);
+    DEBUG_LOG("Opening connection to %s", UTI_SockaddrToString(&addr->sa));
+
+    if (prepare_socket(addr))
+      return 1;
+
+    close_io();
+  }
+
+  return 0;
+}
+
+/* ================================================== */
+
+static void
+bits_to_mask(int bits, int family, IPAddr *mask)
+{
+  int i;
+
+  mask->family = family;
+  switch (family) {
+    case IPADDR_INET4:
+      if (bits > 32 || bits < 0)
+        bits = 32;
+      if (bits > 0) {
+        mask->addr.in4 = -1;
+        mask->addr.in4 <<= 32 - bits;
+      } else {
+        mask->addr.in4 = 0;
+      }
+      break;
+    case IPADDR_INET6:
+      if (bits > 128 || bits < 0)
+        bits = 128;
+      for (i = 0; i < bits / 8; i++)
+        mask->addr.in6[i] = 0xff;
+      if (i < 16)
+        mask->addr.in6[i++] = (0xff << (8 - bits % 8)) & 0xff;
+      for (; i < 16; i++)
+        mask->addr.in6[i] = 0x0;
+      break;
+    default:
+      assert(0);
+  }
+}
+
+/* ================================================== */
+
+static int
+read_mask_address(char *line, IPAddr *mask, IPAddr *address)
+{
+  unsigned int bits;
+  char *p, *q;
+
+  p = line;
+  if (!*p) {
+    mask->family = address->family = IPADDR_UNSPEC;
+    return 1;
+  } else {
+    q = strchr(p, '/');
+    if (q) {
+      *q++ = 0;
+      if (UTI_StringToIP(p, mask)) {
+        p = q;
+        if (UTI_StringToIP(p, address)) {
+          if (address->family == mask->family)
+            return 1;
+        } else if (sscanf(p, "%u", &bits) == 1) {
+          *address = *mask;
+          bits_to_mask(bits, address->family, mask);
+          return 1;
+        }
+      }
+    } else {
+      if (DNS_Name2IPAddress(p, address, 1) == DNS_Success) {
+        bits_to_mask(-1, address->family, mask);
+        return 1;
+      } else {
+        LOG(LOGS_ERR, "Could not get address for hostname");
+        return 0;
+      }
+    }
+  }
+
+  LOG(LOGS_ERR, "Invalid syntax for mask/address");
+  return 0;
+}
+
+/* ================================================== */
+
+static int
+process_cmd_offline(CMD_Request *msg, char *line)
+{
+  IPAddr mask, address;
+  int ok;
+
+  if (read_mask_address(line, &mask, &address)) {
+    UTI_IPHostToNetwork(&mask, &msg->data.offline.mask);
+    UTI_IPHostToNetwork(&address, &msg->data.offline.address);
+    msg->command = htons(REQ_OFFLINE);
+    ok = 1;
+  } else {
+    ok = 0;
+  }
+
+  return ok;
+
+}
+
+/* ================================================== */
+
+
+static int
+process_cmd_online(CMD_Request *msg, char *line)
+{
+  IPAddr mask, address;
+  int ok;
+
+  if (read_mask_address(line, &mask, &address)) {
+    UTI_IPHostToNetwork(&mask, &msg->data.online.mask);
+    UTI_IPHostToNetwork(&address, &msg->data.online.address);
+    msg->command = htons(REQ_ONLINE);
+    ok = 1;
+  } else {
+    ok = 0;
+  }
+
+  return ok;
+
+}
+
+/* ================================================== */
+
+static void
+process_cmd_onoffline(CMD_Request *msg, char *line)
+{
+  msg->command = htons(REQ_ONOFFLINE);
+}
+
+/* ================================================== */
+
+static int
+read_address_integer(char *line, IPAddr *address, int *value)
+{
+  char *hostname;
+  int ok = 0;
+
+  hostname = line;
+  line = CPS_SplitWord(line);
+
+  if (sscanf(line, "%d", value) != 1) {
+    LOG(LOGS_ERR, "Invalid syntax for address value");
+    ok = 0;
+  } else {
+    if (DNS_Name2IPAddress(hostname, address, 1) != DNS_Success) {
+      LOG(LOGS_ERR, "Could not get address for hostname");
+      ok = 0;
+    } else {
+      ok = 1;
+    }
+  }
+
+  return ok;
+
+}
+
+
+/* ================================================== */
+
+static int
+read_address_double(char *line, IPAddr *address, double *value)
+{
+  char *hostname;
+  int ok = 0;
+
+  hostname = line;
+  line = CPS_SplitWord(line);
+
+  if (sscanf(line, "%lf", value) != 1) {
+    LOG(LOGS_ERR, "Invalid syntax for address value");
+    ok = 0;
+  } else {
+    if (DNS_Name2IPAddress(hostname, address, 1) != DNS_Success) {
+      LOG(LOGS_ERR, "Could not get address for hostname");
+      ok = 0;
+    } else {
+      ok = 1;
+    }
+  }
+
+  return ok;
+
+}
+
+
+/* ================================================== */
+
+static int
+process_cmd_minpoll(CMD_Request *msg, char *line)
+{
+  IPAddr address;
+  int minpoll;
+  int ok;
+  
+  if (read_address_integer(line, &address, &minpoll)) {
+    UTI_IPHostToNetwork(&address, &msg->data.modify_minpoll.address);
+    msg->data.modify_minpoll.new_minpoll = htonl(minpoll);
+    msg->command = htons(REQ_MODIFY_MINPOLL);
+    ok = 1;
+  } else {
+    ok = 0;
+  }
+
+  return ok;
+
+}
+
+/* ================================================== */
+
+static int
+process_cmd_maxpoll(CMD_Request *msg, char *line)
+{
+  IPAddr address;
+  int maxpoll;
+  int ok;
+  
+  if (read_address_integer(line, &address, &maxpoll)) {
+    UTI_IPHostToNetwork(&address, &msg->data.modify_maxpoll.address);
+    msg->data.modify_maxpoll.new_maxpoll = htonl(maxpoll);
+    msg->command = htons(REQ_MODIFY_MAXPOLL);
+    ok = 1;
+  } else {
+    ok = 0;
+  }
+
+  return ok;
+
+}
+
+/* ================================================== */
+
+static int
+process_cmd_maxdelay(CMD_Request *msg, char *line)
+{
+  IPAddr address;
+  double max_delay;
+  int ok;
+  
+  if (read_address_double(line, &address, &max_delay)) {
+    UTI_IPHostToNetwork(&address, &msg->data.modify_maxdelay.address);
+    msg->data.modify_maxdelay.new_max_delay = UTI_FloatHostToNetwork(max_delay);
+    msg->command = htons(REQ_MODIFY_MAXDELAY);
+    ok = 1;
+  } else {
+    ok = 0;
+  }
+
+  return ok;
+
+}
+
+/* ================================================== */
+
+static int
+process_cmd_maxdelaydevratio(CMD_Request *msg, char *line)
+{
+  IPAddr address;
+  double max_delay_dev_ratio;
+  int ok;
+  
+  if (read_address_double(line, &address, &max_delay_dev_ratio)) {
+    UTI_IPHostToNetwork(&address, &msg->data.modify_maxdelaydevratio.address);
+    msg->data.modify_maxdelayratio.new_max_delay_ratio = UTI_FloatHostToNetwork(max_delay_dev_ratio);
+    msg->command = htons(REQ_MODIFY_MAXDELAYDEVRATIO);
+    ok = 1;
+  } else {
+    ok = 0;
+  }
+
+  return ok;
+
+}
+
+/* ================================================== */
+
+static int
+process_cmd_maxdelayratio(CMD_Request *msg, char *line)
+{
+  IPAddr address;
+  double max_delay_ratio;
+  int ok;
+  
+  if (read_address_double(line, &address, &max_delay_ratio)) {
+    UTI_IPHostToNetwork(&address, &msg->data.modify_maxdelayratio.address);
+    msg->data.modify_maxdelayratio.new_max_delay_ratio = UTI_FloatHostToNetwork(max_delay_ratio);
+    msg->command = htons(REQ_MODIFY_MAXDELAYRATIO);
+    ok = 1;
+  } else {
+    ok = 0;
+  }
+
+  return ok;
+
+}
+
+/* ================================================== */
+
+static int
+process_cmd_minstratum(CMD_Request *msg, char *line)
+{
+  IPAddr address;
+  int min_stratum;
+  int ok;
+  
+  if (read_address_integer(line, &address, &min_stratum)) {
+    UTI_IPHostToNetwork(&address, &msg->data.modify_minstratum.address);
+    msg->data.modify_minstratum.new_min_stratum = htonl(min_stratum);
+    msg->command = htons(REQ_MODIFY_MINSTRATUM);
+    ok = 1;
+  } else {
+    ok = 0;
+  }
+
+  return ok;
+
+}
+
+/* ================================================== */
+
+static int
+process_cmd_polltarget(CMD_Request *msg, char *line)
+{
+  IPAddr address;
+  int poll_target;
+  int ok;
+  
+  if (read_address_integer(line, &address, &poll_target)) {
+    UTI_IPHostToNetwork(&address, &msg->data.modify_polltarget.address);
+    msg->data.modify_polltarget.new_poll_target = htonl(poll_target);
+    msg->command = htons(REQ_MODIFY_POLLTARGET);
+    ok = 1;
+  } else {
+    ok = 0;
+  }
+
+  return ok;
+
+}
+
+/* ================================================== */
+
+static int
+process_cmd_maxupdateskew(CMD_Request *msg, char *line)
+{
+  int ok;
+  double new_max_update_skew;
+  
+  if (sscanf(line, "%lf", &new_max_update_skew) == 1) {
+    msg->data.modify_maxupdateskew.new_max_update_skew = UTI_FloatHostToNetwork(new_max_update_skew);
+    msg->command = htons(REQ_MODIFY_MAXUPDATESKEW);
+    ok = 1;
+  } else {
+    ok = 0;
+  }
+
+  return ok;
+
+}
+
+/* ================================================== */
+
+static void
+process_cmd_dump(CMD_Request *msg, char *line)
+{
+  msg->command = htons(REQ_DUMP);
+  msg->data.dump.pad = htonl(0);
+}
+
+/* ================================================== */
+
+static void
+process_cmd_writertc(CMD_Request *msg, char *line)
+{
+  msg->command = htons(REQ_WRITERTC);
+}
+
+/* ================================================== */
+
+static void
+process_cmd_trimrtc(CMD_Request *msg, char *line)
+{
+  msg->command = htons(REQ_TRIMRTC);
+}
+
+/* ================================================== */
+
+static void
+process_cmd_cyclelogs(CMD_Request *msg, char *line)
+{
+  msg->command = htons(REQ_CYCLELOGS);
+}
+
+/* ================================================== */
+
+static int
+process_cmd_burst(CMD_Request *msg, char *line)
+{
+  int n_good_samples, n_total_samples;
+  char *s1, *s2;
+  IPAddr address, mask;
+
+  s1 = line;
+  s2 = CPS_SplitWord(s1);
+  CPS_SplitWord(s2);
+
+  if (sscanf(s1, "%d/%d", &n_good_samples, &n_total_samples) != 2) {
+    LOG(LOGS_ERR, "Invalid syntax for burst command");
+    return 0;
+  }
+
+  mask.family = address.family = IPADDR_UNSPEC;
+  if (*s2 && !read_mask_address(s2, &mask, &address)) {
+    return 0;
+  }
+
+  msg->command = htons(REQ_BURST);
+  msg->data.burst.n_good_samples = ntohl(n_good_samples);
+  msg->data.burst.n_total_samples = ntohl(n_total_samples);
+
+  UTI_IPHostToNetwork(&mask, &msg->data.burst.mask);
+  UTI_IPHostToNetwork(&address, &msg->data.burst.address);
+
+  return 1;
+}
+
+/* ================================================== */
+
+static int
+process_cmd_local(CMD_Request *msg, char *line)
+{
+  int on_off, stratum = 0, orphan = 0;
+  double distance = 0.0;
+
+  if (!strcmp(line, "off")) {
+    on_off = 0;
+  } else if (CPS_ParseLocal(line, &stratum, &orphan, &distance)) {
+    on_off = 1;
+  } else {
+    LOG(LOGS_ERR, "Invalid syntax for local command");
+    return 0;
+  }
+
+  msg->command = htons(REQ_LOCAL2);
+  msg->data.local.on_off = htonl(on_off);
+  msg->data.local.stratum = htonl(stratum);
+  msg->data.local.distance = UTI_FloatHostToNetwork(distance);
+  msg->data.local.orphan = htonl(orphan);
+
+  return 1;
+}
+
+/* ================================================== */
+
+static int
+process_cmd_manual(CMD_Request *msg, const char *line)
+{
+  const char *p;
+
+  p = line;
+
+  if (!strcmp(p, "off")) {
+    msg->data.manual.option = htonl(0);
+  } else if (!strcmp(p, "on")) {
+    msg->data.manual.option = htonl(1);
+  } else if (!strcmp(p, "reset")) {
+    msg->data.manual.option = htonl(2);
+  } else {
+    LOG(LOGS_ERR, "Invalid syntax for manual command");
+    return 0;
+  }
+  msg->command = htons(REQ_MANUAL);
+
+  return 1;
+}
+
+/* ================================================== */
+
+static int
+parse_allow_deny(CMD_Request *msg, char *line)
+{
+  unsigned long a, b, c, d;
+  int n, specified_subnet_bits;
+  IPAddr ip;
+  char *p;
+  
+  p = line;
+  if (!*p) {
+    /* blank line - applies to all addresses */
+    ip.family = IPADDR_UNSPEC;
+    UTI_IPHostToNetwork(&ip, &msg->data.allow_deny.ip);
+    msg->data.allow_deny.subnet_bits = htonl(0);
+  } else {
+    char *slashpos;
+    slashpos = strchr(p, '/');
+    if (slashpos) *slashpos = 0;
+    
+    n = 0;
+    if (!UTI_StringToIP(p, &ip) &&
+        (n = sscanf(p, "%lu.%lu.%lu.%lu", &a, &b, &c, &d)) <= 0) {
+
+      /* Try to parse as the name of a machine */
+      if (slashpos || DNS_Name2IPAddress(p, &ip, 1) != DNS_Success) {
+        LOG(LOGS_ERR, "Could not read address");
+        return 0;
+      } else {
+        UTI_IPHostToNetwork(&ip, &msg->data.allow_deny.ip);
+        if (ip.family == IPADDR_INET6)
+          msg->data.allow_deny.subnet_bits = htonl(128);
+        else
+          msg->data.allow_deny.subnet_bits = htonl(32);
+      }        
+    } else {
+      
+      if (n == 0) {
+        if (ip.family == IPADDR_INET6)
+          msg->data.allow_deny.subnet_bits = htonl(128);
+        else
+          msg->data.allow_deny.subnet_bits = htonl(32);
+      } else {
+        ip.family = IPADDR_INET4;
+
+        a &= 0xff;
+        b &= 0xff;
+        c &= 0xff;
+        d &= 0xff;
+        
+        switch (n) {
+          case 1:
+            ip.addr.in4 = htonl((a<<24));
+            msg->data.allow_deny.subnet_bits = htonl(8);
+            break;
+          case 2:
+            ip.addr.in4 = htonl((a<<24) | (b<<16));
+            msg->data.allow_deny.subnet_bits = htonl(16);
+            break;
+          case 3:
+            ip.addr.in4 = htonl((a<<24) | (b<<16) | (c<<8));
+            msg->data.allow_deny.subnet_bits = htonl(24);
+            break;
+          case 4:
+            ip.addr.in4 = htonl((a<<24) | (b<<16) | (c<<8) | d);
+            msg->data.allow_deny.subnet_bits = htonl(32);
+            break;
+          default:
+            assert(0);
+        }
+      }
+
+      UTI_IPHostToNetwork(&ip, &msg->data.allow_deny.ip);
+
+      if (slashpos) {
+        n = sscanf(slashpos+1, "%d", &specified_subnet_bits);
+        if (n == 1) {
+          msg->data.allow_deny.subnet_bits = htonl(specified_subnet_bits);
+        } else {
+          LOG(LOGS_WARN, "Warning: badly formatted subnet size, using %d",
+              (int)ntohl(msg->data.allow_deny.subnet_bits));
+        }
+      } 
+    }
+  }
+  return 1;
+}
+
+/* ================================================== */
+
+static int
+process_cmd_allow(CMD_Request *msg, char *line)
+{
+  int status;
+  msg->command = htons(REQ_ALLOW);
+  status = parse_allow_deny(msg, line);
+  return status;
+}
+
+/* ================================================== */
+
+static int
+process_cmd_allowall(CMD_Request *msg, char *line)
+{
+  int status;
+  msg->command = htons(REQ_ALLOWALL);
+  status = parse_allow_deny(msg, line);
+  return status;
+}
+
+/* ================================================== */
+
+static int
+process_cmd_deny(CMD_Request *msg, char *line)
+{
+  int status;
+  msg->command = htons(REQ_DENY);
+  status = parse_allow_deny(msg, line);
+  return status;
+}
+
+/* ================================================== */
+
+static int
+process_cmd_denyall(CMD_Request *msg, char *line)
+{
+  int status;
+  msg->command = htons(REQ_DENYALL);
+  status = parse_allow_deny(msg, line);
+  return status;
+}
+
+/* ================================================== */
+
+static int
+process_cmd_cmdallow(CMD_Request *msg, char *line)
+{
+  int status;
+  msg->command = htons(REQ_CMDALLOW);
+  status = parse_allow_deny(msg, line);
+  return status;
+}
+
+/* ================================================== */
+
+static int
+process_cmd_cmdallowall(CMD_Request *msg, char *line)
+{
+  int status;
+  msg->command = htons(REQ_CMDALLOWALL);
+  status = parse_allow_deny(msg, line);
+  return status;
+}
+
+/* ================================================== */
+
+static int
+process_cmd_cmddeny(CMD_Request *msg, char *line)
+{
+  int status;
+  msg->command = htons(REQ_CMDDENY);
+  status = parse_allow_deny(msg, line);
+  return status;
+}
+
+/* ================================================== */
+
+static int
+process_cmd_cmddenyall(CMD_Request *msg, char *line)
+{
+  int status;
+  msg->command = htons(REQ_CMDDENYALL);
+  status = parse_allow_deny(msg, line);
+  return status;
+}
+
+/* ================================================== */
+
+static int
+accheck_getaddr(char *line, IPAddr *addr)
+{
+  unsigned long a, b, c, d;
+  IPAddr ip;
+  char *p;
+  p = line;
+  if (!*p) {
+    return 0;
+  } else {
+    if (sscanf(p, "%lu.%lu.%lu.%lu", &a, &b, &c, &d) == 4) {
+      addr->family = IPADDR_INET4;
+      addr->addr.in4 = (a<<24) | (b<<16) | (c<<8) | d;
+      return 1;
+    } else {
+      if (DNS_Name2IPAddress(p, &ip, 1) != DNS_Success) {
+        return 0;
+      } else {
+        *addr = ip;
+        return 1;
+      }
+    }
+  }
+}
+
+/* ================================================== */
+
+static int
+process_cmd_accheck(CMD_Request *msg, char *line)
+{
+  IPAddr ip;
+  msg->command = htons(REQ_ACCHECK);
+  if (accheck_getaddr(line, &ip)) {
+    UTI_IPHostToNetwork(&ip, &msg->data.ac_check.ip);
+    return 1;
+  } else {    
+    LOG(LOGS_ERR, "Could not read address");
+    return 0;
+  }
+}
+
+/* ================================================== */
+
+static int
+process_cmd_cmdaccheck(CMD_Request *msg, char *line)
+{
+  IPAddr ip;
+  msg->command = htons(REQ_CMDACCHECK);
+  if (accheck_getaddr(line, &ip)) {
+    UTI_IPHostToNetwork(&ip, &msg->data.ac_check.ip);
+    return 1;
+  } else {    
+    LOG(LOGS_ERR, "Could not read address");
+    return 0;
+  }
+}
+
+/* ================================================== */
+
+static void
+process_cmd_dfreq(CMD_Request *msg, char *line)
+{
+  double dfreq;
+  msg->command = htons(REQ_DFREQ);
+  if (sscanf(line, "%lf", &dfreq) == 1) {
+    msg->data.dfreq.dfreq = UTI_FloatHostToNetwork(dfreq);
+  } else {
+    msg->data.dfreq.dfreq = UTI_FloatHostToNetwork(0.0);
+  }
+}
+
+/* ================================================== */
+
+static void
+cvt_to_sec_usec(double x, long *sec, long *usec) {
+  long s, us;
+  s = (long) x;
+  us = (long)(0.5 + 1.0e6 * (x - (double) s));
+  while (us >= 1000000) {
+    us -= 1000000;
+    s += 1;
+  }
+  while (us < 0) {
+    us += 1000000;
+    s -= 1;
+  }
+  
+  *sec = s;
+  *usec = us;
+}
+
+/* ================================================== */
+
+static void
+process_cmd_doffset(CMD_Request *msg, char *line)
+{
+  double doffset;
+  long sec, usec;
+  msg->command = htons(REQ_DOFFSET);
+  if (sscanf(line, "%lf", &doffset) == 1) {
+    cvt_to_sec_usec(doffset, &sec, &usec);
+    msg->data.doffset.sec = htonl(sec);
+    msg->data.doffset.usec = htonl(usec);
+  } else {
+    msg->data.doffset.sec = htonl(0);
+    msg->data.doffset.usec = htonl(0);
+  }
+}
+
+/* ================================================== */
+
+static int
+process_cmd_add_server_or_peer(CMD_Request *msg, char *line)
+{
+  CPS_NTP_Source data;
+  IPAddr ip_addr;
+  int result = 0, status;
+  const char *opt_name;
+  
+  status = CPS_ParseNTPSourceAdd(line, &data);
+  switch (status) {
+    case 0:
+      LOG(LOGS_ERR, "Invalid syntax for add command");
+      break;
+    default:
+      if (DNS_Name2IPAddress(data.name, &ip_addr, 1) != DNS_Success) {
+        LOG(LOGS_ERR, "Invalid host/IP address");
+        break;
+      }
+
+      opt_name = NULL;
+      if (opt_name) {
+        LOG(LOGS_ERR, "%s can't be set in chronyc", opt_name);
+        break;
+      }
+
+      msg->data.ntp_source.port = htonl((unsigned long) data.port);
+      UTI_IPHostToNetwork(&ip_addr, &msg->data.ntp_source.ip_addr);
+      msg->data.ntp_source.minpoll = htonl(data.params.minpoll);
+      msg->data.ntp_source.maxpoll = htonl(data.params.maxpoll);
+      msg->data.ntp_source.presend_minpoll = htonl(data.params.presend_minpoll);
+      msg->data.ntp_source.min_stratum = htonl(data.params.min_stratum);
+      msg->data.ntp_source.poll_target = htonl(data.params.poll_target);
+      msg->data.ntp_source.version = htonl(data.params.version);
+      msg->data.ntp_source.max_sources = htonl(data.params.max_sources);
+      msg->data.ntp_source.min_samples = htonl(data.params.min_samples);
+      msg->data.ntp_source.max_samples = htonl(data.params.max_samples);
+      msg->data.ntp_source.authkey = htonl(data.params.authkey);
+      msg->data.ntp_source.max_delay = UTI_FloatHostToNetwork(data.params.max_delay);
+      msg->data.ntp_source.max_delay_ratio = UTI_FloatHostToNetwork(data.params.max_delay_ratio);
+      msg->data.ntp_source.max_delay_dev_ratio =
+        UTI_FloatHostToNetwork(data.params.max_delay_dev_ratio);
+      msg->data.ntp_source.min_delay = UTI_FloatHostToNetwork(data.params.min_delay);
+      msg->data.ntp_source.asymmetry = UTI_FloatHostToNetwork(data.params.asymmetry);
+      msg->data.ntp_source.offset = UTI_FloatHostToNetwork(data.params.offset);
+      msg->data.ntp_source.flags = htonl(
+          (data.params.connectivity == SRC_ONLINE ? REQ_ADDSRC_ONLINE : 0) |
+          (data.params.auto_offline ? REQ_ADDSRC_AUTOOFFLINE : 0) |
+          (data.params.iburst ? REQ_ADDSRC_IBURST : 0) |
+          (data.params.interleaved ? REQ_ADDSRC_INTERLEAVED : 0) |
+          (data.params.burst ? REQ_ADDSRC_BURST : 0) |
+          (data.params.sel_options & SRC_SELECT_PREFER ? REQ_ADDSRC_PREFER : 0) |
+          (data.params.sel_options & SRC_SELECT_NOSELECT ? REQ_ADDSRC_NOSELECT : 0) |
+          (data.params.sel_options & SRC_SELECT_TRUST ? REQ_ADDSRC_TRUST : 0) |
+          (data.params.sel_options & SRC_SELECT_REQUIRE ? REQ_ADDSRC_REQUIRE : 0));
+      msg->data.ntp_source.filter_length = htonl(data.params.filter_length);
+      memset(msg->data.ntp_source.reserved, 0, sizeof (msg->data.ntp_source.reserved));
+
+      result = 1;
+
+      break;
+  }
+
+  return result;
+}
+
+/* ================================================== */
+
+static int
+process_cmd_add_server(CMD_Request *msg, char *line)
+{
+  msg->command = htons(REQ_ADD_SERVER3);
+  return process_cmd_add_server_or_peer(msg, line);
+}
+
+/* ================================================== */
+
+static int
+process_cmd_add_peer(CMD_Request *msg, char *line)
+{
+  msg->command = htons(REQ_ADD_PEER3);
+  return process_cmd_add_server_or_peer(msg, line);
+}
+
+/* ================================================== */
+
+static int
+process_cmd_delete(CMD_Request *msg, char *line)
+{
+  char *hostname;
+  int ok = 0;
+  IPAddr address;
+
+  msg->command = htons(REQ_DEL_SOURCE);
+  hostname = line;
+  CPS_SplitWord(line);
+
+  if (!*hostname) {
+    LOG(LOGS_ERR, "Invalid syntax for address");
+    ok = 0;
+  } else {
+    if (DNS_Name2IPAddress(hostname, &address, 1) != DNS_Success) {
+      LOG(LOGS_ERR, "Could not get address for hostname");
+      ok = 0;
+    } else {
+      UTI_IPHostToNetwork(&address, &msg->data.del_source.ip_addr);
+      ok = 1;
+    }
+  }
+
+  return ok;
+  
+}
+
+/* ================================================== */
+
+static void
+give_help(void)
+{
+  int line, len;
+  const char *s, cols[] =
+    "System clock:\0\0"
+    "tracking\0Display system time information\0"
+    "makestep\0Correct clock by stepping immediately\0"
+    "makestep <threshold> <updates>\0Configure automatic clock stepping\0"
+    "maxupdateskew <skew>\0Modify maximum valid skew to update frequency\0"
+    "waitsync [<max-tries> [<max-correction> [<max-skew> [<interval>]]]]\0"
+                          "Wait until synchronised in specified limits\0"
+    "\0\0"
+    "Time sources:\0\0"
+    "sources [-v]\0Display information about current sources\0"
+    "sourcestats [-v]\0Display statistics about collected measurements\0"
+    "reselect\0Force reselecting synchronisation source\0"
+    "reselectdist <dist>\0Modify reselection distance\0"
+    "\0\0"
+    "NTP sources:\0\0"
+    "activity\0Check how many NTP sources are online/offline\0"
+    "ntpdata [<address>]\0Display information about last valid measurement\0"
+    "add server <address> [options]\0Add new NTP server\0"
+    "add peer <address> [options]\0Add new NTP peer\0"
+    "delete <address>\0Remove server or peer\0"
+    "burst <n-good>/<n-max> [<mask>/<address>]\0Start rapid set of measurements\0"
+    "maxdelay <address> <delay>\0Modify maximum valid sample delay\0"
+    "maxdelayratio <address> <ratio>\0Modify maximum valid delay/minimum ratio\0"
+    "maxdelaydevratio <address> <ratio>\0Modify maximum valid delay/deviation ratio\0"
+    "minpoll <address> <poll>\0Modify minimum polling interval\0"
+    "maxpoll <address> <poll>\0Modify maximum polling interval\0"
+    "minstratum <address> <stratum>\0Modify minimum stratum\0"
+    "offline [<mask>/<address>]\0Set sources in subnet to offline status\0"
+    "online [<mask>/<address>]\0Set sources in subnet to online status\0"
+    "onoffline\0Set all sources to online or offline status\0"
+    "\0according to network configuration\0"
+    "polltarget <address> <target>\0Modify poll target\0"
+    "refresh\0Refresh IP addresses\0"
+    "\0\0"
+    "Manual time input:\0\0"
+    "manual off|on|reset\0Disable/enable/reset settime command\0"
+    "manual list\0Show previous settime entries\0"
+    "manual delete <index>\0Delete previous settime entry\0"
+    "settime <time>\0Set daemon time\0"
+    "\0(e.g. Sep 25, 2015 16:30:05 or 16:30:05)\0"
+    "\0\0NTP access:\0\0"
+    "accheck <address>\0Check whether address is allowed\0"
+    "clients\0Report on clients that have accessed the server\0"
+    "serverstats\0Display statistics of the server\0"
+    "allow [<subnet>]\0Allow access to subnet as a default\0"
+    "allow all [<subnet>]\0Allow access to subnet and all children\0"
+    "deny [<subnet>]\0Deny access to subnet as a default\0"
+    "deny all [<subnet>]\0Deny access to subnet and all children\0"
+    "local [options]\0Serve time even when not synchronised\0"
+    "local off\0Don't serve time when not synchronised\0"
+    "smoothtime reset|activate\0Reset/activate time smoothing\0"
+    "smoothing\0Display current time smoothing state\0"
+    "\0\0"
+    "Monitoring access:\0\0"
+    "cmdaccheck <address>\0Check whether address is allowed\0"
+    "cmdallow [<subnet>]\0Allow access to subnet as a default\0"
+    "cmdallow all [<subnet>]\0Allow access to subnet and all children\0"
+    "cmddeny [<subnet>]\0Deny access to subnet as a default\0"
+    "cmddeny all [<subnet>]\0Deny access to subnet and all children\0"
+    "\0\0"
+    "Real-time clock:\0\0"
+    "rtcdata\0Print current RTC performance parameters\0"
+    "trimrtc\0Correct RTC relative to system clock\0"
+    "writertc\0Save RTC performance parameters to file\0"
+    "\0\0"
+    "Other daemon commands:\0\0"
+    "cyclelogs\0Close and re-open log files\0"
+    "dump\0Dump all measurements to save files\0"
+    "rekey\0Re-read keys from key file\0"
+    "shutdown\0Stop daemon\0"
+    "\0\0"
+    "Client commands:\0\0"
+    "dns -n|+n\0Disable/enable resolving IP addresses to hostnames\0"
+    "dns -4|-6|-46\0Resolve hostnames only to IPv4/IPv6/both addresses\0"
+    "timeout <milliseconds>\0Set initial response timeout\0"
+    "retries <retries>\0Set maximum number of retries\0"
+    "keygen [<id> [<type> [<bits>]]]\0Generate key for key file\0"
+    "exit|quit\0Leave the program\0"
+    "help\0Generate this help\0"
+    "\0";
+
+  /* Indent the second column */
+  for (s = cols, line = 0; s < cols + sizeof (cols); s += len + 1, line++) {
+    len = strlen(s);
+    printf(line % 2 == 0 ? (len >= 28 ? "%s\n%28s" : "%-28s%s") : "%s%s\n",
+           s, "");
+  }
+}
+
+/* ================================================== */
+/* Tab-completion when editline/readline is available */
+
+#ifdef FEAT_READLINE
+
+enum {
+  TAB_COMPLETE_BASE_CMDS,
+  TAB_COMPLETE_ADD_OPTS,
+  TAB_COMPLETE_MANUAL_OPTS,
+  TAB_COMPLETE_SOURCES_OPTS,
+  TAB_COMPLETE_SOURCESTATS_OPTS,
+  TAB_COMPLETE_MAX_INDEX
+};
+
+static int tab_complete_index;
+
+static char *
+command_name_generator(const char *text, int state)
+{
+  const char *name, **names[TAB_COMPLETE_MAX_INDEX];
+  const char *base_commands[] = {
+    "accheck", "activity", "add", "allow", "burst",
+    "clients", "cmdaccheck", "cmdallow", "cmddeny", "cyclelogs", "delete",
+    "deny", "dns", "dump", "exit", "help", "keygen", "local", "makestep",
+    "manual", "maxdelay", "maxdelaydevratio", "maxdelayratio", "maxpoll",
+    "maxupdateskew", "minpoll", "minstratum", "ntpdata", "offline", "online", "onoffline",
+    "polltarget", "quit", "refresh", "rekey", "reselect", "reselectdist",
+    "retries", "rtcdata", "serverstats", "settime", "shutdown", "smoothing",
+    "smoothtime", "sources", "sourcestats",
+    "timeout", "tracking", "trimrtc", "waitsync", "writertc",
+    NULL
+  };
+  const char *add_options[] = { "peer", "server", NULL };
+  const char *manual_options[] = { "on", "off", "delete", "list", "reset", NULL };
+  const char *sources_options[] = { "-v", NULL };
+  const char *sourcestats_options[] = { "-v", NULL };
+  static int list_index, len;
+
+  names[TAB_COMPLETE_BASE_CMDS] = base_commands;
+  names[TAB_COMPLETE_ADD_OPTS] = add_options;
+  names[TAB_COMPLETE_MANUAL_OPTS] = manual_options;
+  names[TAB_COMPLETE_SOURCES_OPTS] = sources_options;
+  names[TAB_COMPLETE_SOURCESTATS_OPTS] = sourcestats_options;
+
+  if (!state) {
+    list_index = 0;
+    len = strlen(text);
+  }
+
+  while ((name = names[tab_complete_index][list_index++])) {
+    if (strncmp(name, text, len) == 0) {
+      return strdup(name);
+    }
+  }
+
+  return NULL;
+}
+
+/* ================================================== */
+
+static char **
+command_name_completion(const char *text, int start, int end)
+{
+  char first[32];
+
+  snprintf(first, MIN(sizeof (first), start + 1), "%s", rl_line_buffer);
+  rl_attempted_completion_over = 1;
+
+  if (!strcmp(first, "add ")) {
+    tab_complete_index = TAB_COMPLETE_ADD_OPTS;
+  } else if (!strcmp(first, "manual ")) {
+    tab_complete_index = TAB_COMPLETE_MANUAL_OPTS;
+  } else if (!strcmp(first, "sources ")) {
+    tab_complete_index = TAB_COMPLETE_SOURCES_OPTS;
+  } else if (!strcmp(first, "sourcestats ")) {
+    tab_complete_index = TAB_COMPLETE_SOURCESTATS_OPTS;
+  } else if (first[0] == '\0') {
+    tab_complete_index = TAB_COMPLETE_BASE_CMDS;
+  } else {
+    return NULL;
+  }
+
+  return rl_completion_matches(text, command_name_generator);
+}
+#endif
+
+/* ================================================== */
+
+static int max_retries = 2;
+static int initial_timeout = 1000;
+static int proto_version = PROTO_VERSION_NUMBER;
+
+/* This is the core protocol module.  Complete particular fields in
+   the outgoing packet, send it, wait for a response, handle retries,
+   etc.  Returns a Boolean indicating whether the protocol was
+   successful or not.*/
+
+static int
+submit_request(CMD_Request *request, CMD_Reply *reply)
+{
+  int select_status;
+  int recv_status;
+  int read_length;
+  int command_length;
+  int padding_length;
+  struct timespec ts_now, ts_start;
+  struct timeval tv;
+  int n_attempts, new_attempt;
+  double timeout;
+  fd_set rdfd;
+
+  request->pkt_type = PKT_TYPE_CMD_REQUEST;
+  request->res1 = 0;
+  request->res2 = 0;
+  request->pad1 = 0;
+  request->pad2 = 0;
+
+  n_attempts = 0;
+  new_attempt = 1;
+
+  do {
+    if (gettimeofday(&tv, NULL))
+      return 0;
+
+    if (new_attempt) {
+      new_attempt = 0;
+
+      if (n_attempts > max_retries)
+        return 0;
+
+      UTI_TimevalToTimespec(&tv, &ts_start);
+
+      UTI_GetRandomBytes(&request->sequence, sizeof (request->sequence));
+      request->attempt = htons(n_attempts);
+      request->version = proto_version;
+      command_length = PKL_CommandLength(request);
+      padding_length = PKL_CommandPaddingLength(request);
+      assert(command_length > 0 && command_length > padding_length);
+
+      n_attempts++;
+
+      /* Zero the padding to not send any uninitialized data */
+      memset(((char *)request) + command_length - padding_length, 0, padding_length);
+
+      if (sock_fd < 0) {
+        DEBUG_LOG("No socket to send request");
+        return 0;
+      }
+
+      if (send(sock_fd, (void *)request, command_length, 0) < 0) {
+        DEBUG_LOG("Could not send %d bytes : %s", command_length, strerror(errno));
+        return 0;
+      }
+
+      DEBUG_LOG("Sent %d bytes", command_length);
+    }
+
+    UTI_TimevalToTimespec(&tv, &ts_now);
+
+    /* Check if the clock wasn't stepped back */
+    if (UTI_CompareTimespecs(&ts_now, &ts_start) < 0)
+      ts_start = ts_now;
+
+    timeout = initial_timeout / 1000.0 * (1U << (n_attempts - 1)) -
+              UTI_DiffTimespecsToDouble(&ts_now, &ts_start);
+    DEBUG_LOG("Timeout %f seconds", timeout);
+
+    /* Avoid calling select() with an invalid timeout */
+    if (timeout <= 0.0) {
+      new_attempt = 1;
+      continue;
+    }
+
+    UTI_DoubleToTimeval(timeout, &tv);
+
+    FD_ZERO(&rdfd);
+    FD_SET(sock_fd, &rdfd);
+
+    if (quit)
+      return 0;
+
+    select_status = select(sock_fd + 1, &rdfd, NULL, NULL, &tv);
+
+    if (select_status < 0) {
+      DEBUG_LOG("select failed : %s", strerror(errno));
+      return 0;
+    } else if (select_status == 0) {
+      /* Timeout must have elapsed, try a resend? */
+      new_attempt = 1;
+    } else {
+      recv_status = recv(sock_fd, (void *)reply, sizeof(CMD_Reply), 0);
+      
+      if (recv_status < 0) {
+        /* If we get connrefused here, it suggests the sendto is
+           going to a dead port */
+        DEBUG_LOG("Could not receive : %s", strerror(errno));
+        new_attempt = 1;
+      } else {
+        DEBUG_LOG("Received %d bytes", recv_status);
+        
+        read_length = recv_status;
+        
+        /* Check if the header is valid */
+        if (read_length < offsetof(CMD_Reply, data) ||
+            (reply->version != proto_version &&
+             !(reply->version >= PROTO_VERSION_MISMATCH_COMPAT_CLIENT &&
+               ntohs(reply->status) == STT_BADPKTVERSION)) ||
+            reply->pkt_type != PKT_TYPE_CMD_REPLY ||
+            reply->res1 != 0 ||
+            reply->res2 != 0 ||
+            reply->command != request->command ||
+            reply->sequence != request->sequence) {
+          DEBUG_LOG("Invalid reply");
+          continue;
+        }
+        
+#if PROTO_VERSION_NUMBER == 6
+        /* Protocol version 5 is similar to 6 except there is no padding.
+           If a version 5 reply with STT_BADPKTVERSION is received,
+           switch our version and try again. */
+        if (proto_version == PROTO_VERSION_NUMBER &&
+            reply->version == PROTO_VERSION_NUMBER - 1) {
+          proto_version = PROTO_VERSION_NUMBER - 1;
+          n_attempts--;
+          new_attempt = 1;
+          continue;
+        }
+#else
+#error unknown compatibility with PROTO_VERSION - 1
+#endif
+
+        /* Check that the packet contains all data it is supposed to have.
+           Unknown responses will always pass this test as their expected
+           length is zero. */
+        if (read_length < PKL_ReplyLength(reply)) {
+          DEBUG_LOG("Reply too short");
+          new_attempt = 1;
+          continue;
+        }
+
+        /* Good packet received, print out results */
+        DEBUG_LOG("Reply cmd=%d reply=%d stat=%d",
+                  ntohs(reply->command), ntohs(reply->reply), ntohs(reply->status));
+        break;
+      }
+    }
+  } while (1);
+
+  return 1;
+}
+
+/* ================================================== */
+
+static int
+request_reply(CMD_Request *request, CMD_Reply *reply, int requested_reply, int verbose)
+{
+  int status;
+
+  while (!submit_request(request, reply)) {
+    /* Try connecting to other addresses before giving up */
+    if (open_io())
+      continue;
+    printf("506 Cannot talk to daemon\n");
+    return 0;
+  }
+
+  status = ntohs(reply->status);
+        
+  if (verbose || status != STT_SUCCESS) {
+    switch (status) {
+      case STT_SUCCESS:
+        printf("200 OK");
+        break;
+      case STT_ACCESSALLOWED:
+        printf("208 Access allowed");
+        break;
+      case STT_ACCESSDENIED:
+        printf("209 Access denied");
+        break;
+      case STT_FAILED:
+        printf("500 Failure");
+        break;
+      case STT_UNAUTH:
+        printf("501 Not authorised");
+        break;
+      case STT_INVALID:
+        printf("502 Invalid command");
+        break;
+      case STT_NOSUCHSOURCE:
+        printf("503 No such source");
+        break;
+      case STT_INVALIDTS:
+        printf("504 Duplicate or stale logon detected");
+        break;
+      case STT_NOTENABLED:
+        printf("505 Facility not enabled in daemon");
+        break;
+      case STT_BADSUBNET:
+        printf("507 Bad subnet");
+        break;
+      case STT_NOHOSTACCESS:
+        printf("510 No command access from this host");
+        break;
+      case STT_SOURCEALREADYKNOWN:
+        printf("511 Source already present");
+        break;
+      case STT_TOOMANYSOURCES:
+        printf("512 Too many sources present");
+        break;
+      case STT_NORTC:
+        printf("513 RTC driver not running");
+        break;
+      case STT_BADRTCFILE:
+        printf("514 Can't write RTC parameters");
+        break;
+      case STT_INVALIDAF:
+        printf("515 Invalid address family");
+        break;
+      case STT_BADSAMPLE:
+        printf("516 Sample index out of range");
+        break;
+      case STT_BADPKTVERSION:
+        printf("517 Protocol version mismatch");
+        break;
+      case STT_BADPKTLENGTH:
+        printf("518 Packet length mismatch");
+        break;
+      case STT_INACTIVE:
+        printf("519 Client logging is not active in the daemon");
+        break;
+      default:
+        printf("520 Got unexpected error from daemon");
+    }
+    printf("\n");
+  }
+  
+  if (status != STT_SUCCESS &&
+      status != STT_ACCESSALLOWED && status != STT_ACCESSDENIED) {
+    return 0;
+  } 
+
+  if (ntohs(reply->reply) != requested_reply) {
+    printf("508 Bad reply from daemon\n");
+    return 0;
+  }
+
+  /* Make sure an unknown response was not requested */
+  assert(PKL_ReplyLength(reply));
+
+  return 1;
+}
+
+/* ================================================== */
+
+static void
+print_seconds(unsigned long s)
+{
+  unsigned long d;
+
+  if (s == (uint32_t)-1) {
+    printf("   -");
+  } else if (s < 1200) {
+    printf("%4lu", s);
+  } else if (s < 36000) {
+    printf("%3lum", s / 60);
+  } else if (s < 345600) {
+    printf("%3luh", s / 3600);
+  } else {
+    d = s / 86400;
+    if (d > 999) {
+      printf("%3luy", d / 365);
+    } else {
+      printf("%3lud", d);
+    }
+  }
+}
+
+/* ================================================== */
+
+static void
+print_nanoseconds(double s)
+{
+  s = fabs(s);
+
+  if (s < 9999.5e-9) {
+    printf("%4.0fns", s * 1e9);
+  } else if (s < 9999.5e-6) {
+    printf("%4.0fus", s * 1e6);
+  } else if (s < 9999.5e-3) {
+    printf("%4.0fms", s * 1e3);
+  } else if (s < 999.5) {
+    printf("%5.1fs", s);
+  } else if (s < 99999.5) {
+    printf("%5.0fs", s);
+  } else if (s < 99999.5 * 60) {
+    printf("%5.0fm", s / 60);
+  } else if (s < 99999.5 * 3600) {
+    printf("%5.0fh", s / 3600);
+  } else if (s < 99999.5 * 3600 * 24) {
+    printf("%5.0fd", s / (3600 * 24));
+  } else {
+    printf("%5.0fy", s / (3600 * 24 * 365));
+  }
+}
+
+/* ================================================== */
+
+static void
+print_signed_nanoseconds(double s)
+{
+  double x;
+
+  x = fabs(s);
+
+  if (x < 9999.5e-9) {
+    printf("%+5.0fns", s * 1e9);
+  } else if (x < 9999.5e-6) {
+    printf("%+5.0fus", s * 1e6);
+  } else if (x < 9999.5e-3) {
+    printf("%+5.0fms", s * 1e3);
+  } else if (x < 999.5) {
+    printf("%+6.1fs", s);
+  } else if (x < 99999.5) {
+    printf("%+6.0fs", s);
+  } else if (x < 99999.5 * 60) {
+    printf("%+6.0fm", s / 60);
+  } else if (x < 99999.5 * 3600) {
+    printf("%+6.0fh", s / 3600);
+  } else if (x < 99999.5 * 3600 * 24) {
+    printf("%+6.0fd", s / (3600 * 24));
+  } else {
+    printf("%+6.0fy", s / (3600 * 24 * 365));
+  }
+}
+
+/* ================================================== */
+
+static void
+print_freq_ppm(double f)
+{
+  if (fabs(f) < 99999.5) {
+    printf("%10.3f", f);
+  } else {
+    printf("%10.0f", f);
+  }
+}
+
+/* ================================================== */
+
+static void
+print_signed_freq_ppm(double f)
+{
+  if (fabs(f) < 99999.5) {
+    printf("%+10.3f", f);
+  } else {
+    printf("%+10.0f", f);
+  }
+}
+
+/* ================================================== */
+
+static void
+print_clientlog_interval(int rate)
+{
+  if (rate >= 127) {
+    printf(" -");
+  } else {
+    printf("%2d", rate);
+  }
+}
+
+/* ================================================== */
+
+static void
+print_header(const char *header)
+{
+  int len;
+
+  if (csv_mode)
+    return;
+
+  printf("%s\n", header);
+
+  len = strlen(header);
+  while (len--)
+    printf("=");
+  printf("\n");
+}
+
+/* ================================================== */
+
+#define REPORT_END 0x1234
+
+/* Print a report. The syntax of the format is similar to printf(), but not all
+   specifiers are supported and some are different! */
+
+static void
+print_report(const char *format, ...)
+{
+  char buf[256];
+  va_list ap;
+  int i, field, sign, width, prec, spec;
+  const char *string;
+  unsigned long long_uinteger;
+  unsigned int uinteger;
+  int integer;
+  struct timespec *ts;
+  struct tm *tm;
+  double dbl;
+
+  va_start(ap, format);
+
+  for (field = 0; ; field++) {
+    /* Search for text between format specifiers and print it
+       if not in the CSV mode */
+    for (i = 0; i < sizeof (buf) && format[i] != '%' && format[i] != '\0'; i++)
+      buf[i] = format[i];
+
+    if (i >= sizeof (buf))
+      break;
+
+    buf[i] = '\0';
+
+    if (!csv_mode)
+      printf("%s", buf);
+
+    if (format[i] == '\0' || format[i + 1] == '\0')
+      break;
+
+    format += i + 1;
+
+    sign = 0;
+    width = 0;
+    prec = 5;
+
+    if (*format == '+' || *format == '-') {
+      sign = 1;
+      format++;
+    }
+
+    if (isdigit((unsigned char)*format)) {
+      width = atoi(format);
+      while (isdigit((unsigned char)*format))
+        format++;
+    }
+
+    if (*format == '.') {
+      format++;
+      prec = atoi(format);
+      while (isdigit((unsigned char)*format))
+        format++;
+    }
+
+    spec = *format;
+    format++;
+
+    /* Disable human-readable formatting in the CSV mode */
+    if (csv_mode) {
+      sign = width = 0;
+
+      if (field > 0)
+        printf(",");
+
+      switch (spec) {
+        case 'C':
+          spec = 'd';
+          break;
+        case 'F':
+        case 'P':
+          prec = 3;
+          spec = 'f';
+          break;
+        case 'O':
+        case 'S':
+          prec = 9;
+          spec = 'f';
+          break;
+        case 'I':
+          spec = 'U';
+          break;
+        case 'T':
+          spec = 'V';
+          break;
+      }
+    }
+
+    switch (spec) {
+      case 'B': /* boolean */
+        integer = va_arg(ap, int);
+        printf("%s", integer ? "Yes" : "No");
+        break;
+      case 'C': /* clientlog interval */
+        integer = va_arg(ap, int);
+        print_clientlog_interval(integer);
+        break;
+      case 'F': /* absolute frequency in ppm with fast/slow keyword */
+      case 'O': /* absolute offset in seconds with fast/slow keyword */
+        dbl = va_arg(ap, double);
+        printf("%*.*f %s %s", width, prec, fabs(dbl),
+               spec == 'O' ? "seconds" : "ppm",
+               (dbl > 0.0) ^ (spec != 'O') ? "slow" : "fast");
+        break;
+      case 'I': /* interval with unit */
+        long_uinteger = va_arg(ap, unsigned long);
+        print_seconds(long_uinteger);
+        break;
+      case 'L': /* leap status */
+        integer = va_arg(ap, int);
+        switch (integer) {
+          case LEAP_Normal:
+            string = "Normal";
+            break;
+          case LEAP_InsertSecond:
+            string = "Insert second";
+            break;
+          case LEAP_DeleteSecond:
+            string = "Delete second";
+            break;
+          case LEAP_Unsynchronised:
+            string = "Not synchronised";
+            break;
+          default:
+            string = "Invalid";
+            break;
+        }
+        printf("%s", string);
+        break;
+      case 'M': /* NTP mode */
+        integer = va_arg(ap, int);
+        switch (integer) {
+          case MODE_ACTIVE:
+            string = "Symmetric active";
+            break;
+          case MODE_PASSIVE:
+            string = "Symmetric passive";
+            break;
+          case MODE_SERVER:
+            string = "Server";
+            break;
+          default:
+            string = "Invalid";
+            break;
+        }
+        printf("%s", string);
+        break;
+      case 'N': /* Timestamp source */
+        integer = va_arg(ap, int);
+        switch (integer) {
+          case 'D':
+            string = "Daemon";
+            break;
+          case 'K':
+            string = "Kernel";
+            break;
+          case 'H':
+            string = "Hardware";
+            break;
+          default:
+            string = "Invalid";
+            break;
+        }
+        printf("%s", string);
+        break;
+      case 'P': /* frequency in ppm */
+        dbl = va_arg(ap, double);
+        if (sign)
+          print_signed_freq_ppm(dbl);
+        else
+          print_freq_ppm(dbl);
+        break;
+      case 'R': /* reference ID in hexdecimal */
+        long_uinteger = va_arg(ap, unsigned long);
+        printf("%08lX", long_uinteger);
+        break;
+      case 'S': /* offset with unit */
+        dbl = va_arg(ap, double);
+        if (sign)
+          print_signed_nanoseconds(dbl);
+        else
+          print_nanoseconds(dbl);
+        break;
+      case 'T': /* timespec as date and time in UTC */
+        ts = va_arg(ap, struct timespec *);
+        tm = gmtime(&ts->tv_sec);
+        if (!tm)
+          break;
+        strftime(buf, sizeof (buf), "%a %b %d %T %Y", tm);
+        printf("%s", buf);
+        break;
+      case 'U': /* unsigned long in decimal */
+        long_uinteger = va_arg(ap, unsigned long);
+        printf("%*lu", width, long_uinteger);
+        break;
+      case 'V': /* timespec as seconds since epoch */
+        ts = va_arg(ap, struct timespec *);
+        printf("%s", UTI_TimespecToString(ts));
+        break;
+      case 'b': /* unsigned int in binary */
+        uinteger = va_arg(ap, unsigned int);
+        for (i = prec - 1; i >= 0; i--)
+          printf("%c", uinteger & 1U << i ? '1' : '0');
+        break;
+
+      /* Classic printf specifiers */
+      case 'c': /* character */
+        integer = va_arg(ap, int);
+        printf("%c", integer);
+        break;
+      case 'd': /* signed int in decimal */
+        integer = va_arg(ap, int);
+        printf("%*d", width, integer);
+        break;
+      case 'f': /* double */
+        dbl = va_arg(ap, double);
+        printf(sign ? "%+*.*f" : "%*.*f", width, prec, dbl);
+        break;
+      case 'o': /* unsigned int in octal */
+        uinteger = va_arg(ap, unsigned int);
+        printf("%*o", width, uinteger);
+        break;
+      case 's': /* string */
+        string = va_arg(ap, const char *);
+        if (sign)
+          printf("%-*s", width, string);
+        else
+          printf("%*s", width, string);
+        break;
+      case 'u': /* unsigned int in decimal */
+        uinteger = va_arg(ap, unsigned int);
+        printf("%*u", width, uinteger);
+        break;
+    }
+  }
+
+  /* Require terminating argument to catch bad type conversions */
+  if (va_arg(ap, int) != REPORT_END)
+    assert(0);
+
+  va_end(ap);
+
+  if (csv_mode)
+    printf("\n");
+}
+
+/* ================================================== */
+
+static void
+print_info_field(const char *format, ...)
+{
+  va_list ap;
+
+  if (csv_mode)
+    return;
+
+  va_start(ap, format);
+  vprintf(format, ap);
+  va_end(ap);
+}
+
+/* ================================================== */
+
+static void
+format_name(char *buf, int size, int trunc_dns, int ref, uint32_t ref_id,
+            IPAddr *ip_addr)
+{
+  if (ref) {
+    snprintf(buf, size, "%s", UTI_RefidToString(ref_id));
+  } else if (no_dns || csv_mode) {
+    snprintf(buf, size, "%s", UTI_IPToString(ip_addr));
+  } else {
+    DNS_IPAddress2Name(ip_addr, buf, size);
+    if (trunc_dns > 0 && strlen(buf) > trunc_dns) {
+      buf[trunc_dns - 1] = '>';
+      buf[trunc_dns] = '\0';
+    }
+  }
+}
+
+/* ================================================== */
+
+static int
+check_for_verbose_flag(char *line)
+{
+  if (!csv_mode && !strcmp(line, "-v"))
+    return 1;
+  return 0;
+}
+
+/* ================================================== */
+
+static int
+process_cmd_sources(char *line)
+{
+  CMD_Request request;
+  CMD_Reply reply;
+  IPAddr ip_addr;
+  uint32_t i, mode, n_sources;
+  char name[50], mode_ch, state_ch;
+  int verbose;
+
+  /* Check whether to output verbose headers */
+  verbose = check_for_verbose_flag(line);
+  
+  request.command = htons(REQ_N_SOURCES);
+  if (!request_reply(&request, &reply, RPY_N_SOURCES, 0))
+    return 0;
+
+  n_sources = ntohl(reply.data.n_sources.n_sources);
+  print_info_field("210 Number of sources = %lu\n", (unsigned long)n_sources);
+
+  if (verbose) {
+    printf("\n");
+    printf("  .-- Source mode  '^' = server, '=' = peer, '#' = local clock.\n");
+    printf(" / .- Source state '*' = current synced, '+' = combined , '-' = not combined,\n");
+    printf("| /   '?' = unreachable, 'x' = time may be in error, '~' = time too variable.\n");
+    printf("||                                                 .- xxxx [ yyyy ] +/- zzzz\n");
+    printf("||      Reachability register (octal) -.           |  xxxx = adjusted offset,\n");
+    printf("||      Log2(Polling interval) --.      |          |  yyyy = measured offset,\n");
+    printf("||                                \\     |          |  zzzz = estimated error.\n");
+    printf("||                                 |    |           \\\n");
+  }
+
+  print_header("MS Name/IP address         Stratum Poll Reach LastRx Last sample               ");
+
+  /*           "MS NNNNNNNNNNNNNNNNNNNNNNNNNNN  SS  PP   RRR  RRRR  SSSSSSS[SSSSSSS] +/- SSSSSS" */
+
+  for (i = 0; i < n_sources; i++) {
+    request.command = htons(REQ_SOURCE_DATA);
+    request.data.source_data.index = htonl(i);
+    if (!request_reply(&request, &reply, RPY_SOURCE_DATA, 0))
+      return 0;
+
+    mode = ntohs(reply.data.source_data.mode);
+    UTI_IPNetworkToHost(&reply.data.source_data.ip_addr, &ip_addr);
+    format_name(name, sizeof (name), 25,
+                mode == RPY_SD_MD_REF && ip_addr.family == IPADDR_INET4,
+                ip_addr.addr.in4, &ip_addr);
+
+    switch (mode) {
+      case RPY_SD_MD_CLIENT:
+        mode_ch = '^';
+        break;
+      case RPY_SD_MD_PEER:
+        mode_ch = '=';
+        break;
+      case RPY_SD_MD_REF:
+        mode_ch = '#';
+        break;
+      default:
+        mode_ch = ' ';
+    }
+
+    switch (ntohs(reply.data.source_data.state)) {
+      case RPY_SD_ST_SYNC:
+        state_ch = '*';
+        break;
+      case RPY_SD_ST_UNREACH:
+        state_ch = '?';
+        break;
+      case RPY_SD_ST_FALSETICKER:
+        state_ch = 'x';
+        break;
+      case RPY_SD_ST_JITTERY:
+        state_ch = '~';
+        break;
+      case RPY_SD_ST_CANDIDATE:
+        state_ch = '+';
+        break;
+      case RPY_SD_ST_OUTLIER:
+        state_ch = '-';
+        break;
+      default:
+        state_ch = ' ';
+    }
+
+    switch (ntohs(reply.data.source_data.flags)) {
+      default:
+        break;
+    }
+
+    print_report("%c%c %-27s  %2d  %2d   %3o  %I  %+S[%+S] +/- %S\n",
+                 mode_ch, state_ch, name,
+                 ntohs(reply.data.source_data.stratum),
+                 (int16_t)ntohs(reply.data.source_data.poll),
+                 ntohs(reply.data.source_data.reachability),
+                 (unsigned long)ntohl(reply.data.source_data.since_sample),
+                 UTI_FloatNetworkToHost(reply.data.source_data.latest_meas),
+                 UTI_FloatNetworkToHost(reply.data.source_data.orig_latest_meas),
+                 UTI_FloatNetworkToHost(reply.data.source_data.latest_meas_err),
+                 REPORT_END);
+  }
+
+  return 1;
+}
+
+/* ================================================== */
+
+static int
+process_cmd_sourcestats(char *line)
+{
+  CMD_Request request;
+  CMD_Reply reply;
+  uint32_t i, n_sources;
+  int verbose = 0;
+  char name[50];
+  IPAddr ip_addr;
+
+  verbose = check_for_verbose_flag(line);
+
+  request.command = htons(REQ_N_SOURCES);
+  if (!request_reply(&request, &reply, RPY_N_SOURCES, 0))
+    return 0;
+
+  n_sources = ntohl(reply.data.n_sources.n_sources);
+  print_info_field("210 Number of sources = %lu\n", (unsigned long)n_sources);
+
+  if (verbose) {
+    printf("                             .- Number of sample points in measurement set.\n");
+    printf("                            /    .- Number of residual runs with same sign.\n");
+    printf("                           |    /    .- Length of measurement set (time).\n");
+    printf("                           |   |    /      .- Est. clock freq error (ppm).\n");
+    printf("                           |   |   |      /           .- Est. error in freq.\n");
+    printf("                           |   |   |     |           /         .- Est. offset.\n");
+    printf("                           |   |   |     |          |          |   On the -.\n");
+    printf("                           |   |   |     |          |          |   samples. \\\n");
+    printf("                           |   |   |     |          |          |             |\n");
+  }
+
+  print_header("Name/IP Address            NP  NR  Span  Frequency  Freq Skew  Offset  Std Dev");
+
+  /*           "NNNNNNNNNNNNNNNNNNNNNNNNN  NP  NR  SSSS FFFFFFFFFF SSSSSSSSSS  SSSSSSS  SSSSSS" */
+
+  for (i = 0; i < n_sources; i++) {
+    request.command = htons(REQ_SOURCESTATS);
+    request.data.source_data.index = htonl(i);
+    if (!request_reply(&request, &reply, RPY_SOURCESTATS, 0))
+      return 0;
+
+    UTI_IPNetworkToHost(&reply.data.sourcestats.ip_addr, &ip_addr);
+    format_name(name, sizeof (name), 25, ip_addr.family == IPADDR_UNSPEC,
+                ntohl(reply.data.sourcestats.ref_id), &ip_addr);
+
+    print_report("%-25s %3U %3U  %I %+P %P  %+S  %S\n",
+                 name,
+                 (unsigned long)ntohl(reply.data.sourcestats.n_samples),
+                 (unsigned long)ntohl(reply.data.sourcestats.n_runs),
+                 (unsigned long)ntohl(reply.data.sourcestats.span_seconds),
+                 UTI_FloatNetworkToHost(reply.data.sourcestats.resid_freq_ppm),
+                 UTI_FloatNetworkToHost(reply.data.sourcestats.skew_ppm),
+                 UTI_FloatNetworkToHost(reply.data.sourcestats.est_offset),
+                 UTI_FloatNetworkToHost(reply.data.sourcestats.sd),
+                 REPORT_END);
+  }
+
+  return 1;
+}
+
+/* ================================================== */
+
+static int
+process_cmd_tracking(char *line)
+{
+  CMD_Request request;
+  CMD_Reply reply;
+  IPAddr ip_addr;
+  uint32_t ref_id;
+  char name[50];
+  struct timespec ref_time;
+  
+  request.command = htons(REQ_TRACKING);
+  if (!request_reply(&request, &reply, RPY_TRACKING, 0))
+    return 0;
+
+  ref_id = ntohl(reply.data.tracking.ref_id);
+
+  UTI_IPNetworkToHost(&reply.data.tracking.ip_addr, &ip_addr);
+  format_name(name, sizeof (name), sizeof (name),
+              ip_addr.family == IPADDR_UNSPEC, ref_id, &ip_addr);
+
+  UTI_TimespecNetworkToHost(&reply.data.tracking.ref_time, &ref_time);
+
+  print_report("Reference ID    : %R (%s)\n"
+               "Stratum         : %u\n"
+               "Ref time (UTC)  : %T\n"
+               "System time     : %.9O of NTP time\n"
+               "Last offset     : %+.9f seconds\n"
+               "RMS offset      : %.9f seconds\n"
+               "Frequency       : %.3F\n"
+               "Residual freq   : %+.3f ppm\n"
+               "Skew            : %.3f ppm\n"
+               "Root delay      : %.9f seconds\n"
+               "Root dispersion : %.9f seconds\n"
+               "Update interval : %.1f seconds\n"
+               "Leap status     : %L\n",
+               (unsigned long)ref_id, name,
+               ntohs(reply.data.tracking.stratum),
+               &ref_time,
+               UTI_FloatNetworkToHost(reply.data.tracking.current_correction),
+               UTI_FloatNetworkToHost(reply.data.tracking.last_offset),
+               UTI_FloatNetworkToHost(reply.data.tracking.rms_offset),
+               UTI_FloatNetworkToHost(reply.data.tracking.freq_ppm),
+               UTI_FloatNetworkToHost(reply.data.tracking.resid_freq_ppm),
+               UTI_FloatNetworkToHost(reply.data.tracking.skew_ppm),
+               UTI_FloatNetworkToHost(reply.data.tracking.root_delay),
+               UTI_FloatNetworkToHost(reply.data.tracking.root_dispersion),
+               UTI_FloatNetworkToHost(reply.data.tracking.last_update_interval),
+               ntohs(reply.data.tracking.leap_status), REPORT_END);
+
+  return 1;
+}
+
+/* ================================================== */
+
+static int
+process_cmd_ntpdata(char *line)
+{
+  CMD_Request request;
+  CMD_Reply reply;
+  IPAddr remote_addr, local_addr;
+  struct timespec ref_time;
+  uint32_t i, n_sources;
+  uint16_t mode;
+  int specified_addr;
+
+  if (*line) {
+    specified_addr = 1;
+    n_sources = 1;
+  } else {
+    specified_addr = 0;
+    request.command = htons(REQ_N_SOURCES);
+    if (!request_reply(&request, &reply, RPY_N_SOURCES, 0))
+      return 0;
+    n_sources = ntohl(reply.data.n_sources.n_sources);
+  }
+
+  for (i = 0; i < n_sources; i++) {
+    if (specified_addr) {
+      if (DNS_Name2IPAddress(line, &remote_addr, 1) != DNS_Success) {
+        LOG(LOGS_ERR, "Could not get address for hostname");
+        return 0;
+      }
+    } else {
+      request.command = htons(REQ_SOURCE_DATA);
+      request.data.source_data.index = htonl(i);
+      if (!request_reply(&request, &reply, RPY_SOURCE_DATA, 0))
+        return 0;
+
+      mode = ntohs(reply.data.source_data.mode);
+      if (mode != RPY_SD_MD_CLIENT && mode != RPY_SD_MD_PEER)
+        continue;
+
+      UTI_IPNetworkToHost(&reply.data.source_data.ip_addr, &remote_addr);
+    }
+
+    request.command = htons(REQ_NTP_DATA);
+    UTI_IPHostToNetwork(&remote_addr, &request.data.ntp_data.ip_addr);
+    if (!request_reply(&request, &reply, RPY_NTP_DATA, 0))
+      return 0;
+
+    UTI_IPNetworkToHost(&reply.data.ntp_data.remote_addr, &remote_addr);
+    UTI_IPNetworkToHost(&reply.data.ntp_data.local_addr, &local_addr);
+    UTI_TimespecNetworkToHost(&reply.data.ntp_data.ref_time, &ref_time);
+
+    if (!specified_addr && !csv_mode)
+      printf("\n");
+
+    print_report("Remote address  : %s (%R)\n"
+                 "Remote port     : %u\n"
+                 "Local address   : %s (%R)\n"
+                 "Leap status     : %L\n"
+                 "Version         : %u\n"
+                 "Mode            : %M\n"
+                 "Stratum         : %u\n"
+                 "Poll interval   : %d (%.0f seconds)\n"
+                 "Precision       : %d (%.9f seconds)\n"
+                 "Root delay      : %.6f seconds\n"
+                 "Root dispersion : %.6f seconds\n"
+                 "Reference ID    : %R (%s)\n"
+                 "Reference time  : %T\n"
+                 "Offset          : %+.9f seconds\n"
+                 "Peer delay      : %.9f seconds\n"
+                 "Peer dispersion : %.9f seconds\n"
+                 "Response time   : %.9f seconds\n"
+                 "Jitter asymmetry: %+.2f\n"
+                 "NTP tests       : %.3b %.3b %.4b\n"
+                 "Interleaved     : %B\n"
+                 "Authenticated   : %B\n"
+                 "TX timestamping : %N\n"
+                 "RX timestamping : %N\n"
+                 "Total TX        : %U\n"
+                 "Total RX        : %U\n"
+                 "Total valid RX  : %U\n",
+                 UTI_IPToString(&remote_addr), (unsigned long)UTI_IPToRefid(&remote_addr),
+                 ntohs(reply.data.ntp_data.remote_port),
+                 UTI_IPToString(&local_addr), (unsigned long)UTI_IPToRefid(&local_addr),
+                 reply.data.ntp_data.leap, reply.data.ntp_data.version,
+                 reply.data.ntp_data.mode, reply.data.ntp_data.stratum,
+                 reply.data.ntp_data.poll, UTI_Log2ToDouble(reply.data.ntp_data.poll),
+                 reply.data.ntp_data.precision, UTI_Log2ToDouble(reply.data.ntp_data.precision),
+                 UTI_FloatNetworkToHost(reply.data.ntp_data.root_delay),
+                 UTI_FloatNetworkToHost(reply.data.ntp_data.root_dispersion),
+                 (unsigned long)ntohl(reply.data.ntp_data.ref_id),
+                 reply.data.ntp_data.stratum <= 1 ?
+                   UTI_RefidToString(ntohl(reply.data.ntp_data.ref_id)) : "",
+                 &ref_time,
+                 UTI_FloatNetworkToHost(reply.data.ntp_data.offset),
+                 UTI_FloatNetworkToHost(reply.data.ntp_data.peer_delay),
+                 UTI_FloatNetworkToHost(reply.data.ntp_data.peer_dispersion),
+                 UTI_FloatNetworkToHost(reply.data.ntp_data.response_time),
+                 UTI_FloatNetworkToHost(reply.data.ntp_data.jitter_asymmetry),
+                 ntohs(reply.data.ntp_data.flags) >> 7,
+                 ntohs(reply.data.ntp_data.flags) >> 4,
+                 ntohs(reply.data.ntp_data.flags),
+                 ntohs(reply.data.ntp_data.flags) & RPY_NTP_FLAG_INTERLEAVED,
+                 ntohs(reply.data.ntp_data.flags) & RPY_NTP_FLAG_AUTHENTICATED,
+                 reply.data.ntp_data.tx_tss_char, reply.data.ntp_data.rx_tss_char,
+                 (unsigned long)ntohl(reply.data.ntp_data.total_tx_count),
+                 (unsigned long)ntohl(reply.data.ntp_data.total_rx_count),
+                 (unsigned long)ntohl(reply.data.ntp_data.total_valid_count),
+                 REPORT_END);
+  }
+
+  return 1;
+}
+
+/* ================================================== */
+
+static int
+process_cmd_serverstats(char *line)
+{
+  CMD_Request request;
+  CMD_Reply reply;
+
+  request.command = htons(REQ_SERVER_STATS);
+  if (!request_reply(&request, &reply, RPY_SERVER_STATS, 0))
+    return 0;
+
+  print_report("NTP packets received       : %U\n"
+               "NTP packets dropped        : %U\n"
+               "Command packets received   : %U\n"
+               "Command packets dropped    : %U\n"
+               "Client log records dropped : %U\n",
+               (unsigned long)ntohl(reply.data.server_stats.ntp_hits),
+               (unsigned long)ntohl(reply.data.server_stats.ntp_drops),
+               (unsigned long)ntohl(reply.data.server_stats.cmd_hits),
+               (unsigned long)ntohl(reply.data.server_stats.cmd_drops),
+               (unsigned long)ntohl(reply.data.server_stats.log_drops),
+               REPORT_END);
+
+  return 1;
+}
+
+/* ================================================== */
+
+static int
+process_cmd_smoothing(char *line)
+{
+  CMD_Request request;
+  CMD_Reply reply;
+  uint32_t flags;
+
+  request.command = htons(REQ_SMOOTHING);
+  if (!request_reply(&request, &reply, RPY_SMOOTHING, 0))
+    return 0;
+
+  flags = ntohl(reply.data.smoothing.flags);
+
+  print_report("Active         : %B %s\n"
+               "Offset         : %+.9f seconds\n"
+               "Frequency      : %+.6f ppm\n"
+               "Wander         : %+.6f ppm per second\n"
+               "Last update    : %.1f seconds ago\n"
+               "Remaining time : %.1f seconds\n",
+               !!(flags & RPY_SMT_FLAG_ACTIVE),
+               flags & RPY_SMT_FLAG_LEAPONLY ? "(leap second only)" : "",
+               UTI_FloatNetworkToHost(reply.data.smoothing.offset),
+               UTI_FloatNetworkToHost(reply.data.smoothing.freq_ppm),
+               UTI_FloatNetworkToHost(reply.data.smoothing.wander_ppm),
+               UTI_FloatNetworkToHost(reply.data.smoothing.last_update_ago),
+               UTI_FloatNetworkToHost(reply.data.smoothing.remaining_time),
+               REPORT_END);
+
+  return 1;
+}
+
+/* ================================================== */
+
+static int
+process_cmd_smoothtime(CMD_Request *msg, const char *line)
+{
+  if (!strcmp(line, "reset")) {
+    msg->data.smoothtime.option = htonl(REQ_SMOOTHTIME_RESET);
+  } else if (!strcmp(line, "activate")) {
+    msg->data.smoothtime.option = htonl(REQ_SMOOTHTIME_ACTIVATE);
+  } else {
+    LOG(LOGS_ERR, "Invalid syntax for smoothtime command");
+    return 0;
+  }
+
+  msg->command = htons(REQ_SMOOTHTIME);
+
+  return 1;
+}
+
+/* ================================================== */
+
+static int
+process_cmd_rtcreport(char *line)
+{
+  CMD_Request request;
+  CMD_Reply reply;
+  struct timespec ref_time;
+  
+  request.command = htons(REQ_RTCREPORT);
+  if (!request_reply(&request, &reply, RPY_RTC, 0))
+    return 0;
+
+  UTI_TimespecNetworkToHost(&reply.data.rtc.ref_time, &ref_time);
+
+  print_report("RTC ref time (UTC) : %T\n"
+               "Number of samples  : %u\n"
+               "Number of runs     : %u\n"
+               "Sample span period : %I\n"
+               "RTC is fast by     : %12.6f seconds\n"
+               "RTC gains time at  : %9.3f ppm\n",
+               &ref_time,
+               ntohs(reply.data.rtc.n_samples),
+               ntohs(reply.data.rtc.n_runs),
+               (unsigned long)ntohl(reply.data.rtc.span_seconds),
+               UTI_FloatNetworkToHost(reply.data.rtc.rtc_seconds_fast),
+               UTI_FloatNetworkToHost(reply.data.rtc.rtc_gain_rate_ppm),
+               REPORT_END);
+
+  return 1;
+}
+
+/* ================================================== */
+
+static int
+process_cmd_clients(char *line)
+{
+  CMD_Request request;
+  CMD_Reply reply;
+  IPAddr ip;
+  uint32_t i, n_clients, next_index, n_indices;
+  RPY_ClientAccesses_Client *client;
+  char name[50];
+
+  next_index = 0;
+
+  print_header("Hostname                      NTP   Drop Int IntL Last     Cmd   Drop Int  Last");
+
+  while (1) {
+    request.command = htons(REQ_CLIENT_ACCESSES_BY_INDEX2);
+    request.data.client_accesses_by_index.first_index = htonl(next_index);
+    request.data.client_accesses_by_index.n_clients = htonl(MAX_CLIENT_ACCESSES);
+
+    if (!request_reply(&request, &reply, RPY_CLIENT_ACCESSES_BY_INDEX2, 0))
+      return 0;
+
+    n_clients = ntohl(reply.data.client_accesses_by_index.n_clients);
+    n_indices = ntohl(reply.data.client_accesses_by_index.n_indices);
+
+    for (i = 0; i < n_clients && i < MAX_CLIENT_ACCESSES; i++) {
+      client = &reply.data.client_accesses_by_index.clients[i];
+
+      UTI_IPNetworkToHost(&client->ip, &ip);
+
+      /* UNSPEC means the record could not be found in the daemon's tables.
+         We shouldn't ever generate this case, but ignore it if we do. */
+      if (ip.family == IPADDR_UNSPEC)
+        continue;
+
+      format_name(name, sizeof (name), 25, 0, 0, &ip);
+
+      print_report("%-25s  %6U  %5U  %C  %C  %I  %6U  %5U  %C  %I\n",
+                   name,
+                   (unsigned long)ntohl(client->ntp_hits),
+                   (unsigned long)ntohl(client->ntp_drops),
+                   client->ntp_interval,
+                   client->ntp_timeout_interval,
+                   (unsigned long)ntohl(client->last_ntp_hit_ago),
+                   (unsigned long)ntohl(client->cmd_hits),
+                   (unsigned long)ntohl(client->cmd_drops),
+                   client->cmd_interval,
+                   (unsigned long)ntohl(client->last_cmd_hit_ago),
+                   REPORT_END);
+    }
+
+    /* Set the next index to probe based on what the server tells us */
+    next_index = ntohl(reply.data.client_accesses_by_index.next_index);
+
+    if (next_index >= n_indices || n_clients < MAX_CLIENT_ACCESSES)
+      break;
+  }
+
+  return 1;
+}
+
+
+/* ================================================== */
+/* Process the manual list command */
+static int
+process_cmd_manual_list(const char *line)
+{
+  CMD_Request request;
+  CMD_Reply reply;
+  uint32_t i, n_samples;
+  RPY_ManualListSample *sample;
+  struct timespec when;
+
+  request.command = htons(REQ_MANUAL_LIST);
+  if (!request_reply(&request, &reply, RPY_MANUAL_LIST2, 0))
+    return 0;
+
+  n_samples = ntohl(reply.data.manual_list.n_samples);
+  print_info_field("210 n_samples = %lu\n", (unsigned long)n_samples);
+
+  print_header("#    Date     Time(UTC)    Slewed   Original   Residual");
+
+  for (i = 0; i < n_samples && i < MAX_MANUAL_LIST_SAMPLES; i++) {
+    sample = &reply.data.manual_list.samples[i];
+    UTI_TimespecNetworkToHost(&sample->when, &when);
+
+    print_report("%2d %s %10.2f %10.2f %10.2f\n",
+                 i, UTI_TimeToLogForm(when.tv_sec),
+                 UTI_FloatNetworkToHost(sample->slewed_offset),
+                 UTI_FloatNetworkToHost(sample->orig_offset),
+                 UTI_FloatNetworkToHost(sample->residual),
+                 REPORT_END);
+  }
+
+  return 1;
+}
+
+/* ================================================== */
+
+static int
+process_cmd_manual_delete(CMD_Request *msg, const char *line)
+{
+  int index;
+
+  if (sscanf(line, "%d", &index) != 1) {
+    LOG(LOGS_ERR, "Bad syntax for manual delete command");
+    return 0;
+  }
+
+  msg->command = htons(REQ_MANUAL_DELETE);
+  msg->data.manual_delete.index = htonl(index);
+  return 1;
+}
+
+/* ================================================== */
+
+static int
+process_cmd_settime(char *line)
+{
+  struct timespec ts;
+  time_t now, new_time;
+  CMD_Request request;
+  CMD_Reply reply;
+  double dfreq_ppm, new_afreq_ppm;
+  double offset;
+
+  now = time(NULL);
+  new_time = get_date(line, &now);
+
+  if (new_time == -1) {
+    printf("510 - Could not parse date string\n");
+  } else {
+    ts.tv_sec = new_time;
+    ts.tv_nsec = 0;
+    UTI_TimespecHostToNetwork(&ts, &request.data.settime.ts);
+    request.command = htons(REQ_SETTIME);
+    if (request_reply(&request, &reply, RPY_MANUAL_TIMESTAMP2, 1)) {
+          offset = UTI_FloatNetworkToHost(reply.data.manual_timestamp.offset);
+          dfreq_ppm = UTI_FloatNetworkToHost(reply.data.manual_timestamp.dfreq_ppm);
+          new_afreq_ppm = UTI_FloatNetworkToHost(reply.data.manual_timestamp.new_afreq_ppm);
+          printf("Clock was %.2f seconds fast.  Frequency change = %.2fppm, new frequency = %.2fppm\n",
+              offset, dfreq_ppm, new_afreq_ppm);
+          return 1;
+    }
+  }
+  return 0;
+}
+
+/* ================================================== */
+
+static void
+process_cmd_rekey(CMD_Request *msg, char *line)
+{
+  msg->command = htons(REQ_REKEY);
+}
+
+/* ================================================== */
+
+static int
+process_cmd_makestep(CMD_Request *msg, char *line)
+{
+  int limit;
+  double threshold;
+
+  if (*line) {
+    if (sscanf(line, "%lf %d", &threshold, &limit) != 2) {
+      LOG(LOGS_ERR, "Bad syntax for makestep command");
+      return 0;
+    }
+    msg->command = htons(REQ_MODIFY_MAKESTEP);
+    msg->data.modify_makestep.limit = htonl(limit);
+    msg->data.modify_makestep.threshold = UTI_FloatHostToNetwork(threshold);
+  } else {
+    msg->command = htons(REQ_MAKESTEP);
+  }
+
+  return 1;
+}
+
+/* ================================================== */
+
+static int
+process_cmd_activity(const char *line)
+{
+  CMD_Request request;
+  CMD_Reply reply;
+
+  request.command = htons(REQ_ACTIVITY);
+  if (!request_reply(&request, &reply, RPY_ACTIVITY, 0))
+    return 0;
+
+  print_info_field("200 OK\n");
+
+  print_report("%U sources online\n"
+               "%U sources offline\n"
+               "%U sources doing burst (return to online)\n"
+               "%U sources doing burst (return to offline)\n"
+               "%U sources with unknown address\n",
+               (unsigned long)ntohl(reply.data.activity.online),
+               (unsigned long)ntohl(reply.data.activity.offline),
+               (unsigned long)ntohl(reply.data.activity.burst_online),
+               (unsigned long)ntohl(reply.data.activity.burst_offline),
+               (unsigned long)ntohl(reply.data.activity.unresolved),
+               REPORT_END);
+
+  return 1;
+}
+
+/* ================================================== */
+
+static int
+process_cmd_reselectdist(CMD_Request *msg, char *line)
+{
+  double dist;
+  int ok;
+  msg->command = htons(REQ_RESELECTDISTANCE);
+  if (sscanf(line, "%lf", &dist) == 1) {
+    msg->data.reselect_distance.distance = UTI_FloatHostToNetwork(dist);
+    ok = 1;
+  } else {
+    ok = 0;
+  }
+  return ok;
+}
+
+/* ================================================== */
+
+static void
+process_cmd_reselect(CMD_Request *msg, char *line)
+{
+  msg->command = htons(REQ_RESELECT);
+}
+
+/* ================================================== */
+
+static void
+process_cmd_refresh(CMD_Request *msg, char *line)
+{
+  msg->command = htons(REQ_REFRESH);
+}
+
+/* ================================================== */
+
+static void
+process_cmd_shutdown(CMD_Request *msg, char *line)
+{
+  msg->command = htons(REQ_SHUTDOWN);
+}
+
+/* ================================================== */
+
+static int
+process_cmd_waitsync(char *line)
+{
+  CMD_Request request;
+  CMD_Reply reply;
+  IPAddr ip_addr;
+  uint32_t ref_id;
+  double correction, skew_ppm, max_correction, max_skew_ppm, interval;
+  int ret = 0, max_tries, i;
+  struct timeval timeout;
+
+  max_tries = 0;
+  max_correction = 0.0;
+  max_skew_ppm = 0.0;
+  interval = 10.0;
+
+  if (sscanf(line, "%d %lf %lf %lf", &max_tries, &max_correction, &max_skew_ppm, &interval))
+    ;
+
+  /* Don't allow shorter interval than 0.1 seconds */
+  if (interval < 0.1)
+    interval = 0.1;
+
+  request.command = htons(REQ_TRACKING);
+
+  for (i = 1; ; i++) {
+    if (request_reply(&request, &reply, RPY_TRACKING, 0)) {
+      ref_id = ntohl(reply.data.tracking.ref_id);
+      UTI_IPNetworkToHost(&reply.data.tracking.ip_addr, &ip_addr);
+
+      correction = UTI_FloatNetworkToHost(reply.data.tracking.current_correction);
+      correction = fabs(correction);
+      skew_ppm = UTI_FloatNetworkToHost(reply.data.tracking.skew_ppm);
+
+      print_report("try: %d, refid: %R, correction: %.9f, skew: %.3f\n",
+                   i, (unsigned long)ref_id, correction, skew_ppm, REPORT_END);
+
+      if ((ip_addr.family != IPADDR_UNSPEC ||
+           (ref_id != 0 && ref_id != 0x7f7f0101L /* LOCAL refid */)) &&
+          (max_correction == 0.0 || correction <= max_correction) &&
+          (max_skew_ppm == 0.0 || skew_ppm <= max_skew_ppm)) {
+        ret = 1;
+      }
+    }
+
+    if (!ret && (!max_tries || i < max_tries) && !quit) {
+      UTI_DoubleToTimeval(interval, &timeout);
+      if (select(0, NULL, NULL, NULL, &timeout))
+        break;
+    } else {
+      break;
+    }
+  }
+  return ret;
+}
+
+/* ================================================== */
+
+static int
+process_cmd_dns(const char *line)
+{
+  if (!strcmp(line, "-46")) {
+    DNS_SetAddressFamily(IPADDR_UNSPEC);
+  } else if (!strcmp(line, "-4")) {
+    DNS_SetAddressFamily(IPADDR_INET4);
+  } else if (!strcmp(line, "-6")) {
+    DNS_SetAddressFamily(IPADDR_INET6);
+  } else if (!strcmp(line, "-n")) {
+    no_dns = 1;
+  } else if (!strcmp(line, "+n")) {
+    no_dns = 0;
+  } else {
+    LOG(LOGS_ERR, "Unrecognized dns command");
+    return 0;
+  }
+  return 1;
+}
+
+/* ================================================== */
+
+static int
+process_cmd_timeout(const char *line)
+{
+  int timeout;
+
+  timeout = atoi(line);
+  if (timeout < 100) {
+    LOG(LOGS_ERR, "Timeout %d is too short", timeout);
+    return 0;
+  }
+  initial_timeout = timeout;
+  return 1;
+}
+
+/* ================================================== */
+
+static int
+process_cmd_retries(const char *line)
+{
+  int retries;
+
+  retries = atoi(line);
+  if (retries < 0 || retries > 30) {
+    LOG(LOGS_ERR, "Invalid maximum number of retries");
+    return 0;
+  }
+  max_retries = retries;
+  return 1;
+}
+
+/* ================================================== */
+
+static int
+process_cmd_keygen(char *line)
+{
+  char hash_name[17];
+  unsigned char key[512];
+  unsigned int i, length, id = 1, bits = 160;
+
+#ifdef FEAT_SECHASH
+  snprintf(hash_name, sizeof (hash_name), "SHA1");
+#else
+  snprintf(hash_name, sizeof (hash_name), "MD5");
+#endif
+
+  if (sscanf(line, "%u %16s %u", &id, hash_name, &bits))
+    ;
+
+  length = CLAMP(10, (bits + 7) / 8, sizeof (key));
+  if (HSH_GetHashId(hash_name) < 0) {
+    LOG(LOGS_ERR, "Unknown hash function %s", hash_name);
+    return 0;
+  }
+
+  UTI_GetRandomBytesUrandom(key, length);
+
+  printf("%u %s HEX:", id, hash_name);
+  for (i = 0; i < length; i++)
+    printf("%02hhX", key[i]);
+  printf("\n");
+
+  return 1;
+}
+
+/* ================================================== */
+
+static int
+process_line(char *line)
+{
+  char *command;
+  int do_normal_submit;
+  int ret;
+  CMD_Request tx_message;
+  CMD_Reply rx_message;
+
+  ret = 0;
+
+  do_normal_submit = 1;
+
+  CPS_NormalizeLine(line);
+
+  if (!*line) {
+    fflush(stderr);
+    fflush(stdout);
+    return 1;
+  };
+
+  command = line;
+  line = CPS_SplitWord(line);
+
+  if (!strcmp(command, "accheck")) {
+    do_normal_submit = process_cmd_accheck(&tx_message, line);
+  } else if (!strcmp(command, "activity")) {
+    do_normal_submit = 0;
+    ret = process_cmd_activity(line);
+  } else if (!strcmp(command, "add") && !strncmp(line, "peer", 4)) {
+    do_normal_submit = process_cmd_add_peer(&tx_message, CPS_SplitWord(line));
+  } else if (!strcmp(command, "add") && !strncmp(line, "server", 6)) {
+    do_normal_submit = process_cmd_add_server(&tx_message, CPS_SplitWord(line));
+  } else if (!strcmp(command, "allow")) {
+    if (!strncmp(line, "all", 3)) {
+      do_normal_submit = process_cmd_allowall(&tx_message, CPS_SplitWord(line));
+    } else {
+      do_normal_submit = process_cmd_allow(&tx_message, line);
+    }
+  } else if (!strcmp(command, "burst")) {
+    do_normal_submit = process_cmd_burst(&tx_message, line);
+  } else if (!strcmp(command, "clients")) {
+    ret = process_cmd_clients(line);
+    do_normal_submit = 0;
+  } else if (!strcmp(command, "cmdaccheck")) {
+    do_normal_submit = process_cmd_cmdaccheck(&tx_message, line);
+  } else if (!strcmp(command, "cmdallow")) {
+    if (!strncmp(line, "all", 3)) {
+      do_normal_submit = process_cmd_cmdallowall(&tx_message, CPS_SplitWord(line));
+    } else {
+      do_normal_submit = process_cmd_cmdallow(&tx_message, line);
+    }
+  } else if (!strcmp(command, "cmddeny")) {
+    if (!strncmp(line, "all", 3)) {
+      line = CPS_SplitWord(line);
+      do_normal_submit = process_cmd_cmddenyall(&tx_message, line);
+    } else {
+      do_normal_submit = process_cmd_cmddeny(&tx_message, line);
+    }
+  } else if (!strcmp(command, "cyclelogs")) {
+    process_cmd_cyclelogs(&tx_message, line);
+  } else if (!strcmp(command, "delete")) {
+    do_normal_submit = process_cmd_delete(&tx_message, line);
+  } else if (!strcmp(command, "deny")) {
+    if (!strncmp(line, "all", 3)) {
+      do_normal_submit = process_cmd_denyall(&tx_message, CPS_SplitWord(line));
+    } else {
+      do_normal_submit = process_cmd_deny(&tx_message, line);
+    }
+  } else if (!strcmp(command, "dfreq")) {
+    process_cmd_dfreq(&tx_message, line);
+  } else if (!strcmp(command, "dns")) {
+    ret = process_cmd_dns(line);
+    do_normal_submit = 0;
+  } else if (!strcmp(command, "doffset")) {
+    process_cmd_doffset(&tx_message, line);
+  } else if (!strcmp(command, "dump")) {
+    process_cmd_dump(&tx_message, line);
+  } else if (!strcmp(command, "exit")) {
+    do_normal_submit = 0;
+    quit = 1;
+    ret = 1;
+  } else if (!strcmp(command, "help")) {
+    do_normal_submit = 0;
+    give_help();
+    ret = 1;
+  } else if (!strcmp(command, "keygen")) {
+    ret = process_cmd_keygen(line);
+    do_normal_submit = 0;
+  } else if (!strcmp(command, "local")) {
+    do_normal_submit = process_cmd_local(&tx_message, line);
+  } else if (!strcmp(command, "makestep")) {
+    do_normal_submit = process_cmd_makestep(&tx_message, line);
+  } else if (!strcmp(command, "manual")) {
+    if (!strncmp(line, "list", 4)) {
+      do_normal_submit = 0;
+      ret = process_cmd_manual_list(CPS_SplitWord(line));
+    } else if (!strncmp(line, "delete", 6)) {
+      do_normal_submit = process_cmd_manual_delete(&tx_message, CPS_SplitWord(line));
+    } else {
+      do_normal_submit = process_cmd_manual(&tx_message, line);
+    }
+  } else if (!strcmp(command, "maxdelay")) {
+    do_normal_submit = process_cmd_maxdelay(&tx_message, line);
+  } else if (!strcmp(command, "maxdelaydevratio")) {
+    do_normal_submit = process_cmd_maxdelaydevratio(&tx_message, line);
+  } else if (!strcmp(command, "maxdelayratio")) {
+    do_normal_submit = process_cmd_maxdelayratio(&tx_message, line);
+  } else if (!strcmp(command, "maxpoll")) {
+    do_normal_submit = process_cmd_maxpoll(&tx_message, line);
+  } else if (!strcmp(command, "maxupdateskew")) {
+    do_normal_submit = process_cmd_maxupdateskew(&tx_message, line);
+  } else if (!strcmp(command, "minpoll")) {
+    do_normal_submit = process_cmd_minpoll(&tx_message, line);
+  } else if (!strcmp(command, "minstratum")) {
+    do_normal_submit = process_cmd_minstratum(&tx_message, line);
+  } else if (!strcmp(command, "ntpdata")) {
+    do_normal_submit = 0;
+    ret = process_cmd_ntpdata(line);
+  } else if (!strcmp(command, "offline")) {
+    do_normal_submit = process_cmd_offline(&tx_message, line);
+  } else if (!strcmp(command, "online")) {
+    do_normal_submit = process_cmd_online(&tx_message, line);
+  } else if (!strcmp(command, "onoffline")) {
+    process_cmd_onoffline(&tx_message, line);
+  } else if (!strcmp(command, "polltarget")) {
+    do_normal_submit = process_cmd_polltarget(&tx_message, line);
+  } else if (!strcmp(command, "quit")) {
+    do_normal_submit = 0;
+    quit = 1;
+    ret = 1;
+  } else if (!strcmp(command, "refresh")) {
+    process_cmd_refresh(&tx_message, line);
+  } else if (!strcmp(command, "rekey")) {
+    process_cmd_rekey(&tx_message, line);
+  } else if (!strcmp(command, "reselect")) {
+    process_cmd_reselect(&tx_message, line);
+  } else if (!strcmp(command, "reselectdist")) {
+    do_normal_submit = process_cmd_reselectdist(&tx_message, line);
+  } else if (!strcmp(command, "retries")) {
+    ret = process_cmd_retries(line);
+    do_normal_submit = 0;
+  } else if (!strcmp(command, "rtcdata")) {
+    do_normal_submit = 0;
+    ret = process_cmd_rtcreport(line);
+  } else if (!strcmp(command, "serverstats")) {
+    do_normal_submit = 0;
+    ret = process_cmd_serverstats(line);
+  } else if (!strcmp(command, "settime")) {
+    do_normal_submit = 0;
+    ret = process_cmd_settime(line);
+  } else if (!strcmp(command, "shutdown")) {
+    process_cmd_shutdown(&tx_message, line);
+  } else if (!strcmp(command, "smoothing")) {
+    do_normal_submit = 0;
+    ret = process_cmd_smoothing(line);
+  } else if (!strcmp(command, "smoothtime")) {
+    do_normal_submit = process_cmd_smoothtime(&tx_message, line);
+  } else if (!strcmp(command, "sources")) {
+    do_normal_submit = 0;
+    ret = process_cmd_sources(line);
+  } else if (!strcmp(command, "sourcestats")) {
+    do_normal_submit = 0;
+    ret = process_cmd_sourcestats(line);
+  } else if (!strcmp(command, "timeout")) {
+    ret = process_cmd_timeout(line);
+    do_normal_submit = 0;
+  } else if (!strcmp(command, "tracking")) {
+    ret = process_cmd_tracking(line);
+    do_normal_submit = 0;
+  } else if (!strcmp(command, "trimrtc")) {
+    process_cmd_trimrtc(&tx_message, line);
+  } else if (!strcmp(command, "waitsync")) {
+    ret = process_cmd_waitsync(line);
+    do_normal_submit = 0;
+  } else if (!strcmp(command, "writertc")) {
+    process_cmd_writertc(&tx_message, line);
+  } else if (!strcmp(command, "authhash") ||
+             !strcmp(command, "password")) {
+    /* Warn, but don't return error to not break scripts */
+    LOG(LOGS_WARN, "Authentication is no longer supported");
+    do_normal_submit = 0;
+    ret = 1;
+  } else {
+    LOG(LOGS_ERR, "Unrecognized command");
+    do_normal_submit = 0;
+  }
+    
+  if (do_normal_submit) {
+    ret = request_reply(&tx_message, &rx_message, RPY_NULL, 1);
+  }
+  fflush(stderr);
+  fflush(stdout);
+  return ret;
+}
+
+/* ================================================== */
+
+static int
+process_args(int argc, char **argv, int multi)
+{
+  int total_length, i, ret = 0;
+  char *line;
+
+  total_length = 0;
+  for(i=0; i<argc; i++) {
+    total_length += strlen(argv[i]) + 1;
+  }
+
+  line = (char *) Malloc((2 + total_length) * sizeof(char));
+
+  for (i = 0; i < argc; i++) {
+    line[0] = '\0';
+    if (multi) {
+      strcat(line, argv[i]);
+    } else {
+      for (; i < argc; i++) {
+        strcat(line, argv[i]);
+        if (i + 1 < argc)
+          strcat(line, " ");
+      }
+    }
+
+    ret = process_line(line);
+    if (!ret || quit)
+      break;
+  }
+
+  Free(line);
+
+  return ret;
+}
+
+/* ================================================== */
+
+static void
+signal_handler(int signum)
+{
+  quit = 1;
+}
+
+/* ================================================== */
+
+static void
+display_gpl(void)
+{
+    printf("chrony version %s\n"
+           "Copyright (C) 1997-2003, 2007, 2009-2018 Richard P. Curnow and others\n"
+           "chrony comes with ABSOLUTELY NO WARRANTY.  This is free software, and\n"
+           "you are welcome to redistribute it under certain conditions.  See the\n"
+           "GNU General Public License version 2 for details.\n\n",
+           CHRONY_VERSION);
+}
+
+/* ================================================== */
+
+static void
+print_help(const char *progname)
+{
+      printf("Usage: %s [-h HOST] [-p PORT] [-n] [-c] [-d] [-4|-6] [-m] [COMMAND]\n",
+             progname);
+}
+
+/* ================================================== */
+
+static void
+print_version(void)
+{
+      printf("chronyc (chrony) version %s (%s)\n", CHRONY_VERSION, CHRONYC_FEATURES);
+}
+
+/* ================================================== */
+
+int
+main(int argc, char **argv)
+{
+  char *line;
+  const char *progname = argv[0];
+  const char *hostnames = NULL;
+  int opt, ret = 1, multi = 0, family = IPADDR_UNSPEC;
+  int port = DEFAULT_CANDM_PORT;
+
+  /* Parse (undocumented) long command-line options */
+  for (optind = 1; optind < argc; optind++) {
+    if (!strcmp("--help", argv[optind])) {
+      print_help(progname);
+      return 0;
+    } else if (!strcmp("--version", argv[optind])) {
+      print_version();
+      return 0;
+    }
+  }
+
+  optind = 1;
+
+  /* Parse short command-line options */
+  while ((opt = getopt(argc, argv, "+46acdf:h:mnp:v")) != -1) {
+    switch (opt) {
+      case '4':
+      case '6':
+        family = opt == '4' ? IPADDR_INET4 : IPADDR_INET6;
+        break;
+      case 'a':
+      case 'f':
+        /* For compatibility only */
+        break;
+      case 'c':
+        csv_mode = 1;
+        break;
+      case 'd':
+        log_debug_enabled = 1;
+        break;
+      case 'h':
+        hostnames = optarg;
+        break;
+      case 'm':
+        multi = 1;
+        break;
+      case 'n':
+        no_dns = 1;
+        break;
+      case 'p':
+        port = atoi(optarg);
+        break;
+      case 'v':
+        print_version();
+        return 0;
+      default:
+        print_help(progname);
+        return 1;
+    }
+  }
+
+  if (isatty(0) && isatty(1) && isatty(2)) {
+    on_terminal = 1;
+  }
+
+  if (on_terminal && optind == argc) {
+    display_gpl();
+  }
+  
+  DNS_SetAddressFamily(family);
+
+  if (!hostnames) {
+    hostnames = DEFAULT_COMMAND_SOCKET",127.0.0.1,::1";
+  }
+
+  UTI_SetQuitSignalsHandler(signal_handler, 0);
+
+  sockaddrs = get_sockaddrs(hostnames, port);
+
+  if (!open_io())
+    LOG_FATAL("Could not open connection to daemon");
+
+  if (optind < argc) {
+    ret = process_args(argc - optind, argv + optind, multi);
+  } else {
+    do {
+      line = read_line();
+      if (line && !quit) {
+        ret = process_line(line);
+      }else {
+	/* supply the final '\n' when user exits via ^D */
+        if( on_terminal ) printf("\n");
+      }
+    } while (line && !quit);
+  }
+
+  close_io();
+
+  ARR_DestroyInstance(sockaddrs);
+
+  return !ret;
+}
+
+