libcollectdclient: Implement server code.

The implementation is intentionally similar to the Golang implementation.
Security features (signing, encryption) are still missing.

diff --git a/Makefile.am b/Makefile.am
index f8d911da8d651ce8a8a716365bc1ff672626229d..866c1037649c594d6d6642b8b886c9fc44f0d586 100644 (file)
--- a/Makefile.am
+++ b/Makefile.am
@@ -89,6 +89,7 @@ nodist_pkgconfig_DATA = \
 
 pkginclude_HEADERS = \
        src/libcollectdclient/collectd/client.h \
+       src/libcollectdclient/collectd/server.h \
        src/libcollectdclient/collectd/network.h \
        src/libcollectdclient/collectd/network_buffer.h \
        src/libcollectdclient/collectd/lcc_features.h
@@ -133,7 +134,8 @@ check_PROGRAMS = \
        test_utils_mount \
        test_utils_subst \
        test_utils_time \
-       test_utils_vl_lookup
+       test_utils_vl_lookup \
+       test_lib_server
 
 
 TESTS = $(check_PROGRAMS)
@@ -471,20 +473,28 @@ endif
 libcollectdclient_la_SOURCES = \
        src/libcollectdclient/client.c \
        src/libcollectdclient/network.c \
-       src/libcollectdclient/network_buffer.c
+       src/libcollectdclient/network_buffer.c \
+       src/libcollectdclient/server.c
 libcollectdclient_la_CPPFLAGS = \
        $(AM_CPPFLAGS) \
        -I$(srcdir)/src/libcollectdclient \
        -I$(top_builddir)/src/libcollectdclient \
        -I$(srcdir)/src/daemon
 libcollectdclient_la_LDFLAGS = -version-info 1:0:0
-libcollectdclient_la_LIBADD = 
+libcollectdclient_la_LIBADD = -lm
 if BUILD_WITH_LIBGCRYPT
 libcollectdclient_la_CPPFLAGS += $(GCRYPT_CPPFLAGS)
 libcollectdclient_la_LDFLAGS += $(GCRYPT_LDFLAGS)
 libcollectdclient_la_LIBADD += $(GCRYPT_LIBS)
 endif
 
+# server_test.c includes server.c, so no need to link with
+# libcollectdclient.so.
+test_lib_server_SOURCES = src/libcollectdclient/server_test.c
+test_lib_server_CPPFLAGS = \
+       $(AM_CPPFLAGS) \
+       -I$(srcdir)/src/libcollectdclient \
+       -I$(top_builddir)/src/libcollectdclient
 
 liboconfig_la_SOURCES = \
        src/liboconfig/oconfig.c \

diff --git a/src/libcollectdclient/collectd/client.h b/src/libcollectdclient/collectd/client.h
index fd4899fc06551b09983b912d9814903aa46546e1..ea812c1b6774971239c2259760ed9aa78197bedc 100644 (file)
--- a/src/libcollectdclient/collectd/client.h
+++ b/src/libcollectdclient/collectd/client.h
@@ -40,8 +40,8 @@
 /*
  * Includes (for data types)
  */
-#include <stdint.h>
 #include <inttypes.h>
+#include <stdint.h>
 #include <time.h>
 
 LCC_BEGIN_DECLS

diff --git a/src/libcollectdclient/collectd/server.h b/src/libcollectdclient/collectd/server.h
new file mode 100644 (file)
index 0000000..d7175ec
--- /dev/null
+++ b/src/libcollectdclient/collectd/server.h
@@ -0,0 +1,87 @@
+/**
+ * Copyright 2017 Florian Forster
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ * Authors:
+ *   Florian octo Forster <octo at collectd.org>
+ **/
+
+#ifndef LIBCOLLECTD_SERVER_H
+#define LIBCOLLECTD_SERVER_H 1
+
+#include "collectd/lcc_features.h"
+
+#include "collectd/types.h"
+
+#include <stdint.h>
+
+LCC_BEGIN_DECLS
+
+/* lcc_value_list_writer_t is a write callback to which value lists are
+ * dispatched. */
+typedef int (*lcc_value_list_writer_t)(lcc_value_list_t const *);
+
+/* lcc_listener_t holds parameters for running a collectd server. */
+typedef struct {
+  /* conn is a UDP socket for the server to listen on. */
+  int conn;
+
+  /* node is the local address to listen on if conn is <0. Defaults to "::" (any
+   * address). */
+  char *node;
+
+  /* service is the local address to listen on if conn is <0. Defaults to
+   * LCC_DEFAULT_PORT. */
+  char *service;
+
+  /* writer is the callback used to send incoming lcc_value_list_t to. */
+  lcc_value_list_writer_t writer;
+
+  /* buffer_size determines the maximum packet size to accept. */
+  uint16_t buffer_size;
+
+  /* TODO(octo): User to password lookup. */
+  /* char const * (*password_lookup) (char const *); */
+
+  /* TODO(octo): Minimal required security level. */
+  /* int security_level; */
+
+  /* interface is the name of the interface to use when subscribing to a
+   * multicast group. Has no effect when using unicast. */
+  char *interface;
+} lcc_listener_t;
+
+/* lcc_listen_and_write listens on the provided UDP socket (or opens one using
+ * srv.addr if srv.conn is less than zero), parses the received packets and
+ * writes them to the provided lcc_value_list_writer_t. Returns non-zero on
+ * failure and does not return otherwise. */
+int lcc_listen_and_write(lcc_listener_t srv);
+
+/* lcc_network_parse parses data received from the network and calls "w" with
+ * the parsed lcc_value_list_ts. */
+/* TODO(octo): the Go code returns a []api.ValueList. Should we return a
+ * value_list_t** here? */
+int lcc_network_parse(void *buffer, size_t buffer_size,
+                      lcc_value_list_writer_t w);
+
+LCC_END_DECLS
+
+/* vim: set sw=2 sts=2 et : */
+#endif /* LIBCOLLECTD_SERVER_H */

diff --git a/src/libcollectdclient/server.c b/src/libcollectdclient/server.c
new file mode 100644 (file)
index 0000000..a4f9974
--- /dev/null
+++ b/src/libcollectdclient/server.c
@@ -0,0 +1,545 @@
+/**
+ * Copyright 2017 Florian Forster
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ * Authors:
+ *   Florian octo Forster <octo at collectd.org>
+ **/
+
+#if HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#if !defined(__GNUC__) || !__GNUC__
+#define __attribute__(x) /**/
+#endif
+
+#include "collectd/lcc_features.h"
+#include "collectd/server.h"
+
+#include <arpa/inet.h>
+#include <endian.h>
+#include <errno.h>
+#include <inttypes.h>
+#include <math.h>
+#include <net/if.h>
+#include <netdb.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/socket.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#include <stdio.h>
+#define DEBUG(...) printf(__VA_ARGS__)
+
+static _Bool is_multicast(struct addrinfo const *ai) {
+  if (ai->ai_family == AF_INET) {
+    struct sockaddr_in *addr = (struct sockaddr_in *)ai->ai_addr;
+    return IN_MULTICAST(ntohl(addr->sin_addr.s_addr));
+  } else if (ai->ai_family == AF_INET6) {
+    struct sockaddr_in6 *addr = (struct sockaddr_in6 *)ai->ai_addr;
+    return IN6_IS_ADDR_MULTICAST(&addr->sin6_addr);
+  }
+  return 0;
+}
+
+static int server_multicast_join(lcc_listener_t *srv,
+                                 struct sockaddr_storage *group, int loop_back,
+                                 int ttl) {
+  if (group->ss_family == AF_INET) {
+    struct sockaddr_in *sa = (struct sockaddr_in *)group;
+
+    int status = setsockopt(srv->conn, IPPROTO_IP, IP_MULTICAST_LOOP,
+                            &loop_back, sizeof(loop_back));
+    if (status == -1) {
+      DEBUG("setsockopt(IP_MULTICAST_LOOP, %d) = %d\n", loop_back, errno);
+      return errno;
+    }
+
+    status =
+        setsockopt(srv->conn, IPPROTO_IP, IP_MULTICAST_TTL, &ttl, sizeof(ttl));
+    if (status == -1)
+      return errno;
+
+#if HAVE_STRUCT_IP_MREQN_IMR_IFINDEX
+    struct ip_mreqn mreq = {
+        .imr_address.s_addr = INADDR_ANY,
+        .imr_multiaddr.s_addr = sa->sin_addr.s_addr,
+        .imr_ifindex = if_nametoindex(srv->interface),
+    };
+#else
+    struct ip_mreq mreq = {
+        .imr_address.s_addr = INADDR_ANY, .imr_multiaddr.s_addr = sa->s_addr,
+    };
+#endif
+    status = setsockopt(srv->conn, IPPROTO_IP, IP_ADD_MEMBERSHIP, &mreq,
+                        sizeof(mreq));
+    if (status == -1)
+      return errno;
+  } else if (group->ss_family == AF_INET6) {
+    struct sockaddr_in6 *sa = (struct sockaddr_in6 *)group;
+
+    int status = setsockopt(srv->conn, IPPROTO_IPV6, IPV6_MULTICAST_LOOP,
+                            &loop_back, sizeof(loop_back));
+    if (status == -1)
+      return errno;
+
+    status = setsockopt(srv->conn, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, &ttl,
+                        sizeof(ttl));
+    if (status == -1)
+      return errno;
+
+    struct ipv6_mreq mreq6 = {
+        .ipv6mr_interface = if_nametoindex(srv->interface),
+    };
+    memcpy(&mreq6.ipv6mr_multiaddr, &sa->sin6_addr, sizeof(struct in6_addr));
+
+    status = setsockopt(srv->conn, IPPROTO_IPV6, IPV6_ADD_MEMBERSHIP, &mreq6,
+                        sizeof(mreq6));
+    if (status == -1)
+      return errno;
+  } else {
+    return EINVAL;
+  }
+
+  return 0;
+}
+
+static int server_bind_socket(lcc_listener_t *srv, struct addrinfo const *ai) {
+  /* allow multiple sockets to use the same PORT number */
+  if (setsockopt(srv->conn, SOL_SOCKET, SO_REUSEADDR, &(int){1}, sizeof(int)) ==
+      -1) {
+    return errno;
+  }
+
+  if (bind(srv->conn, ai->ai_addr, ai->ai_addrlen) == -1) {
+    return -1;
+  }
+
+  if (is_multicast(ai)) {
+    int status = server_multicast_join(srv, (void *)ai->ai_addr, /* loop = */ 1,
+                                       /* ttl = */ 16);
+    if (status != 0)
+      return status;
+  }
+
+  return 0;
+}
+
+static int server_open(lcc_listener_t *srv) {
+  struct addrinfo *res = NULL;
+  int status = getaddrinfo(srv->node ? srv->node : "::",
+                           srv->service ? srv->service : LCC_DEFAULT_PORT,
+                           &(struct addrinfo){
+                               .ai_flags = AI_ADDRCONFIG,
+                               .ai_family = AF_UNSPEC,
+                               .ai_socktype = SOCK_DGRAM,
+                           },
+                           &res);
+  if (status != 0)
+    return status;
+
+  for (struct addrinfo *ai = res; ai != NULL; ai = ai->ai_next) {
+    srv->conn = socket(ai->ai_family, ai->ai_socktype, 0);
+    if (srv->conn == -1)
+      continue;
+
+    status = server_bind_socket(srv, ai);
+    if (status != 0) {
+      close(srv->conn);
+      srv->conn = -1;
+      continue;
+    }
+
+    break;
+  }
+
+  freeaddrinfo(res);
+
+  if (srv->conn >= 0)
+    return 0;
+  return status != 0 ? status : -1;
+}
+
+int lcc_listen_and_write(lcc_listener_t srv) {
+  _Bool close_socket = 0;
+
+  if (srv.conn < 0) {
+    int status = server_open(&srv);
+    if (status != 0)
+      return status;
+    close_socket = 1;
+  }
+
+  if (srv.buffer_size == 0)
+    /* TODO(octo): this should be a define. */
+    srv.buffer_size = 1452;
+
+  int ret = 0;
+  while (42) {
+    char buffer[srv.buffer_size];
+    ssize_t len = recv(srv.conn, buffer, sizeof(buffer), /* flags = */ 0);
+    if (len == -1) {
+      ret = errno;
+      break;
+    } else if (len == 0) {
+      break;
+    }
+
+    /* TODO(octo): implement parse(). */
+    (void)lcc_network_parse(buffer, (size_t)len, srv.writer);
+  }
+
+  if (close_socket) {
+    close(srv.conn);
+    srv.conn = -1;
+  }
+
+  return ret;
+}
+
+typedef struct {
+  uint8_t *data;
+  size_t len;
+} buffer_t;
+
+static int buffer_next(buffer_t *b, void *out, size_t n) {
+  if (b->len < n) {
+    return -1;
+  }
+  memmove(out, b->data, n);
+
+  b->data += n;
+  b->len -= n;
+
+  return 0;
+}
+
+static int buffer_uint16(buffer_t *b, uint16_t *out) {
+  uint16_t tmp;
+  if (buffer_next(b, &tmp, sizeof(tmp)) != 0)
+    return -1;
+
+  *out = be16toh(tmp);
+  return 0;
+}
+
+#define TYPE_HOST 0x0000
+#define TYPE_TIME 0x0001
+#define TYPE_TIME_HR 0x0008
+#define TYPE_PLUGIN 0x0002
+#define TYPE_PLUGIN_INSTANCE 0x0003
+#define TYPE_TYPE 0x0004
+#define TYPE_TYPE_INSTANCE 0x0005
+#define TYPE_VALUES 0x0006
+#define TYPE_INTERVAL 0x0007
+#define TYPE_INTERVAL_HR 0x0009
+
+static int parse_int(void *payload, size_t payload_size, uint64_t *out) {
+  uint64_t tmp;
+
+  if (payload_size != sizeof(tmp))
+    return EINVAL;
+
+  memmove(&tmp, payload, sizeof(tmp));
+  *out = be64toh(tmp);
+  return 0;
+}
+
+static int parse_string(void *payload, size_t payload_size, char *out,
+                        size_t out_size) {
+  char *in = payload;
+
+  if ((payload_size < 1) || (in[payload_size - 1] != 0) ||
+      (payload_size > out_size))
+    return EINVAL;
+
+  strncpy(out, in, out_size);
+  return 0;
+}
+
+static int parse_identifier(uint16_t type, void *payload, size_t payload_size,
+                            lcc_value_list_t *state) {
+  char buf[LCC_NAME_LEN];
+
+  if (parse_string(payload, payload_size, buf, sizeof(buf)) != 0)
+    return EINVAL;
+
+  switch (type) {
+  case TYPE_HOST:
+    memmove(state->identifier.host, buf, LCC_NAME_LEN);
+    break;
+  case TYPE_PLUGIN:
+    memmove(state->identifier.plugin, buf, LCC_NAME_LEN);
+    break;
+  case TYPE_PLUGIN_INSTANCE:
+    memmove(state->identifier.plugin_instance, buf, LCC_NAME_LEN);
+    break;
+  case TYPE_TYPE:
+    memmove(state->identifier.type, buf, LCC_NAME_LEN);
+    break;
+  case TYPE_TYPE_INSTANCE:
+    memmove(state->identifier.type_instance, buf, LCC_NAME_LEN);
+    break;
+  default:
+    return EINVAL;
+  }
+
+  return 0;
+}
+
+static int parse_time(uint16_t type, void *payload, size_t payload_size,
+                      lcc_value_list_t *state) {
+  uint64_t tmp = 0;
+  if (parse_int(payload, payload_size, &tmp))
+    return EINVAL;
+
+  double t = (double)tmp;
+  switch (type) {
+  case TYPE_INTERVAL:
+    state->interval = t;
+    break;
+  case TYPE_INTERVAL_HR:
+    state->interval = t / 1073741824.0;
+    break;
+  case TYPE_TIME:
+    state->time = t;
+    break;
+  case TYPE_TIME_HR:
+    state->time = t / 1073741824.0;
+    break;
+  default:
+    return EINVAL;
+  }
+
+  return 0;
+}
+
+static double ntohd(double val) /* {{{ */
+{
+  static int config = 0;
+
+  union {
+    uint8_t byte[8];
+    double floating;
+  } in = {
+      .floating = val,
+  };
+  union {
+    uint8_t byte[8];
+    double floating;
+  } out = {
+      .byte = {0},
+  };
+
+  if (config == 0) {
+    double d = 8.642135e130;
+    uint8_t b[8];
+
+    memcpy(b, &d, sizeof(b));
+
+    if ((b[0] == 0x2f) && (b[1] == 0x25) && (b[2] == 0xc0) && (b[3] == 0xc7) &&
+        (b[4] == 0x43) && (b[5] == 0x2b) && (b[6] == 0x1f) && (b[7] == 0x5b))
+      config = 1; /* need nothing */
+    else if ((b[7] == 0x2f) && (b[6] == 0x25) && (b[5] == 0xc0) &&
+             (b[4] == 0xc7) && (b[3] == 0x43) && (b[2] == 0x2b) &&
+             (b[1] == 0x1f) && (b[0] == 0x5b))
+      config = 2; /* endian flip */
+    else if ((b[4] == 0x2f) && (b[5] == 0x25) && (b[6] == 0xc0) &&
+             (b[7] == 0xc7) && (b[0] == 0x43) && (b[1] == 0x2b) &&
+             (b[2] == 0x1f) && (b[3] == 0x5b))
+      config = 3; /* int swap */
+    else
+      config = 4;
+  }
+
+  if (memcmp((char[]){0, 0, 0, 0, 0, 0, 0xf8, 0x7f}, in.byte, 8) == 0) {
+    return NAN;
+  } else if (config == 1) {
+    return val;
+  } else if (config == 2) {
+    in.floating = val;
+    out.byte[0] = in.byte[7];
+    out.byte[1] = in.byte[6];
+    out.byte[2] = in.byte[5];
+    out.byte[3] = in.byte[4];
+    out.byte[4] = in.byte[3];
+    out.byte[5] = in.byte[2];
+    out.byte[6] = in.byte[1];
+    out.byte[7] = in.byte[0];
+    return (out.floating);
+  } else if (config == 3) {
+    in.floating = val;
+    out.byte[0] = in.byte[4];
+    out.byte[1] = in.byte[5];
+    out.byte[2] = in.byte[6];
+    out.byte[3] = in.byte[7];
+    out.byte[4] = in.byte[0];
+    out.byte[5] = in.byte[1];
+    out.byte[6] = in.byte[2];
+    out.byte[7] = in.byte[3];
+    return out.floating;
+  } else {
+    /* If in doubt, just copy the value back to the caller. */
+    return val;
+  }
+} /* }}} double ntohd */
+
+static int parse_values(void *payload, size_t payload_size,
+                        lcc_value_list_t *state) {
+  buffer_t *b = &(buffer_t){
+      .data = payload, .len = payload_size,
+  };
+
+  uint16_t n;
+  if (buffer_uint16(b, &n))
+    return EINVAL;
+
+  if (((size_t)n * 9) != b->len)
+    return EINVAL;
+
+  state->values_len = (size_t)n;
+  state->values = calloc(sizeof(*state->values), state->values_len);
+  state->values_types = calloc(sizeof(*state->values_types), state->values_len);
+  if ((state->values == NULL) || (state->values_types == NULL)) {
+    free(state->values);
+    free(state->values_types);
+    return ENOMEM;
+  }
+
+  for (uint16_t i = 0; i < n; i++) {
+    uint8_t tmp;
+    if (buffer_next(b, &tmp, sizeof(tmp)))
+      return EINVAL;
+    state->values_types[i] = (int)tmp;
+  }
+
+  for (uint16_t i = 0; i < n; i++) {
+    uint64_t tmp;
+    if (buffer_next(b, &tmp, sizeof(tmp)))
+      return EINVAL;
+
+    if (state->values_types[i] == LCC_TYPE_GAUGE) {
+      union {
+        uint64_t i;
+        double d;
+      } conv = {.i = tmp};
+      state->values[i].gauge = ntohd(conv.d);
+      continue;
+    }
+
+    tmp = be64toh(tmp);
+    switch (state->values_types[i]) {
+    case LCC_TYPE_COUNTER:
+      state->values[i].counter = (counter_t)tmp;
+      break;
+    case LCC_TYPE_DERIVE:
+      state->values[i].derive = (derive_t)tmp;
+      break;
+    case LCC_TYPE_ABSOLUTE:
+      state->values[i].absolute = (absolute_t)tmp;
+      break;
+    default:
+      return EINVAL;
+    }
+  }
+
+  return 0;
+}
+
+int lcc_network_parse(void *data, size_t data_size, lcc_value_list_writer_t w) {
+  buffer_t *b = &(buffer_t){
+      .data = data, .len = data_size,
+  };
+
+  lcc_value_list_t state = {0};
+
+  while (b->len > 0) {
+    uint16_t type = 0, sz = 0;
+    if (buffer_uint16(b, &type) || buffer_uint16(b, &sz)) {
+      DEBUG("lcc_network_parse(): reading type and/or length failed.\n");
+      return EINVAL;
+    }
+
+    if ((sz < 5) || (((size_t)sz - 4) > b->len)) {
+      DEBUG("lcc_network_parse(): invalid 'sz' field: sz = %" PRIu16
+            ", b->len = %zu\n",
+            sz, b->len);
+      return EINVAL;
+    }
+    sz -= 4;
+
+    uint8_t payload[sz];
+    if (buffer_next(b, payload, sizeof(payload)))
+      return EINVAL;
+
+    switch (type) {
+    case TYPE_HOST:
+    case TYPE_PLUGIN:
+    case TYPE_PLUGIN_INSTANCE:
+    case TYPE_TYPE:
+    case TYPE_TYPE_INSTANCE: {
+      if (parse_identifier(type, payload, sizeof(payload), &state)) {
+        DEBUG("lcc_network_parse(): parse_identifier failed.\n");
+        return EINVAL;
+      }
+      break;
+    }
+
+    case TYPE_INTERVAL:
+    case TYPE_INTERVAL_HR:
+    case TYPE_TIME:
+    case TYPE_TIME_HR: {
+      if (parse_time(type, payload, sizeof(payload), &state)) {
+        DEBUG("lcc_network_parse(): parse_time failed.\n");
+        return EINVAL;
+      }
+      break;
+    }
+
+    case TYPE_VALUES: {
+      lcc_value_list_t vl = state;
+      if (parse_values(payload, sizeof(payload), &vl)) {
+        DEBUG("lcc_network_parse(): parse_values failed.\n");
+        return EINVAL;
+      }
+
+      /* TODO(octo): skip if current_security_level < required_security_level */
+
+      int status = w(&vl);
+
+      free(vl.values);
+      free(vl.values_types);
+
+      if (status != 0)
+        return status;
+      break;
+    }
+
+    default: {
+      DEBUG("lcc_network_parse(): ignoring unknown type %" PRIu16 "\n", type);
+      return EINVAL;
+    }
+    }
+  }
+
+  return 0;
+}

diff --git a/src/libcollectdclient/server_test.c b/src/libcollectdclient/server_test.c
new file mode 100644 (file)
index 0000000..bdcfbc6
--- /dev/null
+++ b/src/libcollectdclient/server_test.c
@@ -0,0 +1,435 @@
+/**
+ * Copyright 2017 Florian Forster
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ * Authors:
+ *   Florian octo Forster <octo at collectd.org>
+ **/
+
+#include "collectd/lcc_features.h"
+
+#include "collectd/network_buffer.h"
+
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "server.c" /* sic */
+
+char *raw_packet_data[] = {
+    "0000000e6c6f63616c686f7374000008000c1513676ac3a6e0970009000c00000002800000"
+    "000002000973776170000004000973776170000005000966726565000006000f0001010000"
+    "0080ff610f420008000c1513676ac3a8fc120004000c737761705f696f0000050007696e00"
+    "0006000f00010200000000000000000008000c1513676ac3a9077d000500086f7574000006"
+    "000f00010200000000000000000008000c1513676ac3bd2a8c0002000e696e746572666163"
+    "65000003000965746830000004000e69665f6f637465747300000500050000060018000202"
+    "02000000000000000000000000000000000008000c1513676ac3bd5a970004000e69665f65"
+    "72726f7273000006001800020202000000000000000000000000000000000008000c151367"
+    "6ac3bd7fea000300076c6f000004000e69665f6f6374657473000006001800020202000000"
+    "000009e79c000000000009e79c0008000c1513676ac3bdaae60003000a776c616e30000006"
+    "001800020202000000001009fa5400000000011cf6670008000c1513676ac3bdb0e0000400"
+    "0e69665f6572726f7273000006001800020202000000000000000000000000000000000008"
+    "000c1513676ac3bd3d6d0003000965746830000004000f69665f7061636b65747300000600"
+    "1800020202000000000000000000000000000000000008000c1513676ac3bdae290003000a"
+    "776c616e300000060018000202020000000000032f8f00000000000205e50008000c151367"
+    "6ac3bdbb7b0003000c646f636b657230000006001800020202000000000000000000000000"
+    "000000000008000c1513676ac3bda0db000300076c6f000004000e69665f6572726f727300"
+    "0006001800020202000000000000000000000000000000000008000c1513676ac3bdbde800"
+    "03000c646f636b657230000006001800020202000000000000000000000000000000000008"
+    "000c1513676ac3bd8d8e000300076c6f000004000f69665f7061636b657473000006001800"
+    "0202020000000000000c9c0000000000000c9c0008000c1513676ac3bdb90b0003000c646f"
+    "636b657230000004000e69665f6f6374657473000006001800020202000000000000000000"
+    "000000000000000008000c1513676ac469b10f0002000e70726f6365737365730000030005"
+    "000004000d70735f7374617465000005000c7a6f6d62696573000006000f00010100000000"
+    "000000000008000c1513676ac469a4a30005000d736c656570696e67000006000f00010100"
+    "00000000006e400008000c1513676ac469c6320005000b706167696e67000006000f000101"
+    "00000000000000000008000c1513676ac469f06e0005000c626c6f636b6564000006000f00"
+    "010100000000000000000008000c1513676ac4698af40005000c72756e6e696e6700000600"
+    "0f00010100000000000000000008000c1513676ac469bbe10005000c73746f707065640000"
+    "06000f00010100000000000000000008000c1513676ac46b8e710004000e666f726b5f7261"
+    "74650000050005000006000f0001020000000000001bcf0008000c1513676d437f12960002"
+    "00086370750000030006300000040008637075000005000b73797374656d000006000f0001"
+    "0200000000000021870008000c1513676d437f36020005000969646c65000006000f000102"
+    "000000000005847a0008000c1513676d437f979b0005000977616974000006000f00010200"
+    "000000000005210008000c1513676d43802ff60005000c736f6674697271000006000f0001"
+    "02000000000000001f0008000c1513676d43803b3a0005000a737465616c000006000f0001"
+    "020000000000000000",
+    "0000000e6c6f63616c686f7374000008000c1513676d4380551f0009000c00000002800000"
+    "00000200086370750000030006310000040008637075000005000975736572000006000f00"
+    "01020000000000007cad0008000c1513676d43805dbe000500096e696365000006000f0001"
+    "0200000000000001de0008000c1513676d4380697d0005000b73797374656d000006000f00"
+    "01020000000000001ce80008000c1513676d438072bd0005000969646c65000006000f0001"
+    "02000000000005931c0008000c1513676d43807c430005000977616974000006000f000102"
+    "000000000000094b0008000c1513676d43808cee0005000c736f6674697271000006000f00"
+    "010200000000000000120008000c1513676d4380843a0005000e696e746572727570740000"
+    "06000f00010200000000000000000008000c1513676d438096230005000a737465616c0000"
+    "06000f00010200000000000000000008000c1513676d4380aa9c0003000632000005000975"
+    "736572000006000f00010200000000000089580008000c1513676d4380b29f000500096e69"
+    "6365000006000f00010200000000000003610008000c1513676d4380c44c0005000969646c"
+    "65000006000f000102000000000005873d0008000c1513676d4380bc0f0005000b73797374"
+    "656d000006000f000102000000000000201d0008000c1513676d4380cea400050009776169"
+    "74000006000f00010200000000000005810008000c1513676d4380d7370005000e696e7465"
+    "7272757074000006000f00010200000000000000000008000c1513676d4380ea830005000a"
+    "737465616c000006000f00010200000000000000000008000c1513676d437eef6200030006"
+    "3000000500096e696365000006000f00010200000000000003920008000c1513676d4380e0"
+    "260003000632000005000c736f6674697271000006000f0001020000000000000016000800"
+    "0c1513676d438101410003000633000005000975736572000006000f000102000000000000"
+    "7d8a0008000c1513676d438109f5000500096e696365000006000f00010200000000000004"
+    "350008000c1513676d4380244b0003000630000005000e696e74657272757074000006000f"
+    "00010200000000000000000008000c1513676d438122070003000633000005000969646c65"
+    "000006000f0001020000000000058eb60008000c1513676d43812e83000500097761697400"
+    "0006000f0001020000000000000ca80008000c1513676d438141480005000c736f66746972"
+    "71000006000f000102000000000000001e0008000c1513676d43814a5d0005000a73746561"
+    "6c000006000f00010200000000000000000008000c1513676d4381149e0005000b73797374"
+    "656d000006000f0001020000000000001b9a0008000c1513676d437ea86000030006300000"
+    "05000975736572000006000f00010200000000000089a80008000c1513676d438138190003"
+    "000633000005000e696e74657272757074000006000f00010200000000000000000008000c"
+    "1513676d438a9ca00002000e696e74657266616365000003000965746830000004000e6966"
+    "5f6f6374657473000005000500000600180002020200000000000000000000000000000000"
+    "0008000c1513676d438aea760004000f69665f7061636b6574730000060018000202020000"
+    "00000000000000000000000000000008000c1513676d438b214d0004000e69665f6572726f"
+    "727300000600180002020200000000000000000000000000000000",
+    "0000000e6c6f63616c686f7374000008000c1513676d438aac590009000c00000002800000"
+    "000002000764660000030009726f6f74000004000f64665f636f6d706c6578000005000966"
+    "726565000006000f0001010000004c077e57420008000c1513676d438b6ada0005000d7265"
+    "736572766564000006000f00010100000000338116420008000c1513676d438b7a17000200"
+    "0e696e7465726661636500000300076c6f000004000e69665f6f6374657473000005000500"
+    "0006001800020202000000000009ecf5000000000009ecf50008000c1513676d438b757800"
+    "02000764660000030009726f6f74000004000f64665f636f6d706c65780000050009757365"
+    "64000006000f000101000000e0a41b26420008000c1513676d438b8ed20002000e696e7465"
+    "726661636500000300076c6f000004000e69665f6572726f72730000050005000006001800"
+    "020202000000000000000000000000000000000008000c1513676d438b86bf0004000f6966"
+    "5f7061636b6574730000060018000202020000000000000c9d0000000000000c9d0008000c"
+    "1513676d438bb3e60003000a776c616e300000060018000202020000000000032fab000000"
+    "00000205ed0008000c1513676d438bd62e0003000c646f636b657230000004000e69665f6f"
+    "6374657473000006001800020202000000000000000000000000000000000008000c151367"
+    "6d438bbc8f0003000a776c616e30000004000e69665f6572726f7273000006001800020202"
+    "000000000000000000000000000000000008000c1513676d438bdf030003000c646f636b65"
+    "7230000004000f69665f7061636b6574730000060018000202020000000000000000000000"
+    "00000000000008000c1513676d438baaf10003000a776c616e30000004000e69665f6f6374"
+    "65747300000600180002020200000000100a042300000000011cfa460008000c1513676d43"
+    "8c5f100002000764660000030009626f6f74000004000f64665f636f6d706c657800000500"
+    "0966726565000006000f0001010000000010e198410008000c1513676d438c689c0005000d"
+    "7265736572766564000006000f00010100000000804c68410008000c1513676d438c70ce00"
+    "05000975736564000006000f0001010000000020ea9e410008000c1513676d438be7bc0002"
+    "000e696e74657266616365000003000c646f636b657230000004000e69665f6572726f7273"
+    "0000050005000006001800020202000000000000000000000000000000000008000c151367"
+    "6d43beca8c0002000c656e74726f70790000030005000004000c656e74726f707900000600"
+    "0f0001010000000000088f400008000c1513676d43bf1d13000200096c6f61640000040009"
+    "6c6f6164000006002100030101019a9999999999a93f666666666666d63f5c8fc2f5285cdf"
+    "3f0008000c1513676d43c02b85000200096469736b00000300087364610000040010646973"
+    "6b5f6f63746574730000060018000202020000000075887800000000005b6f3c000008000c"
+    "1513676d43c06d1f0004000d6469736b5f6f7073000006001800020202000000000003cbbd"
+    "000000000001c0510008000c1513676d43c08b6a0004000e6469736b5f74696d6500000600"
+    "1800020202000000000000003f00000000000001720008000c1513676d43c0a5fb00040010"
+    "6469736b5f6d65726765640000060018000202020000000000001285000000000000f80100"
+    "08000c1513676d43c0c8b4000300097364613100000400106469736b5f6f63746574730000"
+    "060018000202020000000001107c000000000000003c00",
+    "0000000e6c6f63616c686f7374000008000c1513676d43c0d00a0009000c00000002800000"
+    "00000200096469736b000003000973646131000004000d6469736b5f6f7073000006001800"
+    "020202000000000000029b00000000000000080008000c1513676d43c0d7b20004000e6469"
+    "736b5f74696d650000060018000202020000000000000004000000000000000f0008000c15"
+    "13676d43c0df73000400106469736b5f6d6572676564000006001800020202000000000000"
+    "0fb400000000000000010008000c1513676d43c0f87c000300097364613200000400106469"
+    "736b5f6f637465747300000600180002020200000000000008000000000000000000000800"
+    "0c1513676d43c1003e0004000d6469736b5f6f707300000600180002020200000000000000"
+    "0200000000000000000008000c1513676d43c107bf000400106469736b5f6d657267656400"
+    "0006001800020202000000000000000000000000000000000008000c1513676d43c12fa400"
+    "03000973646135000004000d6469736b5f6f7073000006001800020202000000000003c867"
+    "000000000001aef20008000c1513676d43c13d5e000400106469736b5f6d65726765640000"
+    "0600180002020200000000000002d1000000000000f8000008000c1513676d43c136a90004"
+    "000e6469736b5f74696d65000006001800020202000000000000003f000000000000011c00"
+    "08000c1513676d43c1740500030009646d2d3000000400106469736b5f6f63746574730000"
+    "060018000202020000000074596400000000005b6f00000008000c1513676d43c179c70004"
+    "000d6469736b5f6f7073000006001800020202000000000003cae4000000000002b0f30008"
+    "000c1513676d43c18abe000400106469736b5f6d6572676564000006001800020202000000"
+    "000000000000000000000000000008000c1513676d43c181b90004000e6469736b5f74696d"
+    "650000060018000202020000000000000040000000000000013e0008000c1513676d43c1a9"
+    "5e00030009646d2d3100000400106469736b5f6f6374657473000006001800020202000000"
+    "00000e000000000000000000000008000c1513676d43c1b7ea0004000e6469736b5f74696d"
+    "65000006001800020202000000000000000200000000000000000008000c1513676d43c1b0"
+    "3e0004000d6469736b5f6f707300000600180002020200000000000000e000000000000000"
+    "000008000c1513676d43c1c00d000400106469736b5f6d6572676564000006001800020202"
+    "000000000000000000000000000000000008000c1513676d43c12818000300097364613500"
+    "000400106469736b5f6f637465747300000600180002020200000000746c6400000000005b"
+    "6f00000008000c1513676d43d320a80002000c62617474657279000003000630000004000b"
+    "636861726765000006000f0001018fc2f5285c2f58400008000c1513676d43d36fd6000400"
+    "0c63757272656e74000006000f00010100000000000000800008000c1513676d43d3cdb600"
+    "04000c766f6c74616765000006000f000101736891ed7cbf28400008000c1513676d43d59d"
+    "d60002000869727100000300050000040008697271000005000630000006000f0001020000"
+    "0000000000110008000c1513676d43d5d2cf0005000631000006000f000102000000000000"
+    "00100008000c1513676d43d5fe820005000638000006000f00010200000000000000010008"
+    "000c1513676d43d635440005000639000006000f00010200000000000035210008000c1513"
+    "676d43d66265000500073132000006000f0001020000000000000790",
+    "0000000e6c6f63616c686f7374000008000c1513676d43d68e940009000c00000002800000"
+    "0000020008697271000004000869727100000500073136000006000f000102000000000000"
+    "00210008000c1513676d43d69be20002000a7573657273000004000a757365727300000500"
+    "05000006000f00010100000000000010400008000c1513676d43d6aa5d0002000869727100"
+    "0004000869727100000500073233000006000f00010200000000000000250008000c151367"
+    "6d43d6c7dc000500073431000006000f000102000000000000ff7d0008000c1513676d43d6"
+    "e23d000500073432000006000f00010200000000000008070008000c1513676d43d9aa3a00"
+    "0500073437000006000f0001020000000000079a260008000c1513676d43d9cca900050007"
+    "3438000006000f00010200000000000000c70008000c1513676d43d9ea5d00050007343900"
+    "0006000f00010200000000000004c20008000c1513676d43da050e00050007353000000600"
+    "0f000102000000000000001c0008000c1513676d43da1efa000500084e4d49000006000f00"
+    "010200000000000000000008000c1513676d43da3c82000500084c4f43000006000f000102"
+    "000000000018d3080008000c1513676d43da544e00050008535055000006000f0001020000"
+    "0000000000000008000c1513676d43da6cca00050008504d49000006000f00010200000000"
+    "000000000008000c1513676d43da885400050008495749000006000f000102000000000000"
+    "a9da0008000c1513676d43daa23a00050008525452000006000f0001020000000000000003"
+    "0008000c1513676d43dabaed00050008524553000006000f00010200000000000ac8360008"
+    "000c1513676d43dad4150005000843414c000006000f000102000000000000191f0008000c"
+    "1513676d43daeef300050008544c42000006000f000102000000000003dbdc0008000c1513"
+    "676d43db11410005000854524d000006000f00010200000000000000000008000c1513676d"
+    "43db292c00050008544852000006000f00010200000000000000000008000c1513676d43db"
+    "411d000500084d4345000006000f00010200000000000000000008000c1513676d43db5b59"
+    "000500084d4350000006000f000102000000000000003c0008000c1513676d43db68010005"
+    "0008455252000006000f00010200000000000000000008000c1513676d43db758a00050008"
+    "4d4953000006000f00010200000000000000000008000c1513676d43dd2e800002000b6d65"
+    "6d6f7279000004000b6d656d6f7279000005000975736564000006000f00010100000000fe"
+    "bbe0410008000c1513676d43dd3f4b0005000d6275666665726564000006000f0001010000"
+    "000070fbc8410008000c1513676d43dd48700005000b636163686564000006000f00010100"
+    "000000c008df410008000c1513676d43dd51c60005000966726565000006000f0001010000"
+    "0080481d05420008000c1513676d43dec7e300020009737761700000040009737761700000"
+    "05000975736564000006000f00010100000000000000000008000c1513676d43ded4490005"
+    "000966726565000006000f00010100000080ff610f420008000c1513676d43dedcfd000500"
+    "0b636163686564000006000f00010100000000000000000008000c1513676d43d715e30002"
+    "0008697271000004000869727100000500073434000006000f0001020000000000031b6100"
+    "08000c1513676d43d73116000500073435000006000f00010200000000000000180008000c"
+    "1513676d43ee00150002000973776170000004000c737761705f696f0000050007696e0000"
+    "06000f0001020000000000000000",
+};
+
+static int decode_string(char const *in, uint8_t *out, size_t *out_size) {
+  size_t in_size = strlen(in);
+  if (*out_size < (in_size / 2))
+    return -1;
+  *out_size = in_size / 2;
+
+  for (size_t i = 0; i < *out_size; i++) {
+    char tmp[] = {in[2 * i], in[2 * i + 1], 0};
+    out[i] = (uint8_t)strtoul(tmp, NULL, 16);
+  }
+
+  return 0;
+}
+
+static int nop_writer(lcc_value_list_t const *vl) {
+  if (!strlen(vl->identifier.host) || !strlen(vl->identifier.plugin) ||
+      !strlen(vl->identifier.type)) {
+    return EINVAL;
+  }
+  return 0;
+}
+
+static int test_network_parse() {
+  int ret = 0;
+
+  for (size_t i = 0; i < sizeof(raw_packet_data) / sizeof(raw_packet_data[0]);
+       i++) {
+    uint8_t buffer[LCC_NETWORK_BUFFER_SIZE_DEFAULT];
+    size_t buffer_size = sizeof(buffer);
+    if (decode_string(raw_packet_data[i], buffer, &buffer_size)) {
+      fprintf(
+          stderr,
+          "lcc_network_parse(raw_packet_data[%zu]): decoding string failed\n",
+          i);
+      return -1;
+    }
+
+    int status = lcc_network_parse(buffer, buffer_size, nop_writer);
+    if (status != 0) {
+      fprintf(stderr, "lcc_network_parse(raw_packet_data[%zu]) = %d, want 0\n",
+              i, status);
+      ret = status;
+    }
+
+    printf("ok - lcc_network_parse(raw_packet_data[%zu])\n", i);
+  }
+
+  return ret;
+}
+
+static int test_parse_time() {
+  int ret = 0;
+
+  struct {
+    uint64_t in;
+    double want;
+  } cases[] = {
+      {1439980823, 1439980823.0},
+      {1439981005, 1439981005.0},
+      {1439981150, 1439981150.0},
+  };
+
+  for (size_t i = 0; i < sizeof(cases) / sizeof(cases[0]); i++) {
+    lcc_value_list_t vl = LCC_VALUE_LIST_INIT;
+
+    uint64_t be = htobe64(cases[i].in);
+    int status = parse_time(TYPE_TIME, &be, sizeof(be), &vl);
+    if ((status != 0) || (vl.time != cases[i].want)) {
+      fprintf(stderr, "parse_time(%" PRIu64 ") = (%.0f, %d), want (%.0f, 0)\n",
+              cases[i].in, vl.time, status, cases[i].want);
+      ret = -1;
+    }
+  }
+
+  struct {
+    uint64_t in;
+    double want;
+  } cases_hr[] = {
+      {1546167635576736987, 1439980823.152453627},
+      {1546167831554815222, 1439981005.671262017},
+      {1546167986577716567, 1439981150.047589622},
+  };
+
+  for (size_t i = 0; i < sizeof(cases_hr) / sizeof(cases_hr[0]); i++) {
+    lcc_value_list_t vl = LCC_VALUE_LIST_INIT;
+
+    uint64_t be = htobe64(cases_hr[i].in);
+    int status = parse_time(TYPE_TIME_HR, &be, sizeof(be), &vl);
+    if ((status != 0) || (vl.time != cases_hr[i].want)) {
+      fprintf(stderr, "parse_time(%" PRIu64 ") = (%.9f, %d), want (%.9f, 0)\n",
+              cases_hr[i].in, vl.time, status, cases_hr[i].want);
+      ret = -1;
+    }
+  }
+
+  return ret;
+}
+
+static int test_parse_string() {
+  int ret = 0;
+
+  struct {
+    uint8_t *in;
+    size_t in_len;
+    char *want;
+  } cases[] = {
+      {(uint8_t[]){0}, 1, ""},
+      {(uint8_t[]){'t', 'e', 's', 't', 0}, 5, "test"},
+      {(uint8_t[]){'t', 'e', 's', 't'}, 4, NULL}, // null byte missing
+      {(uint8_t[]){'t', 'e', 's', 't', 'x', 0}, 6,
+       NULL}, // output buffer too small
+  };
+
+  for (size_t i = 0; i < sizeof(cases) / sizeof(cases[0]); i++) {
+    char got[5] = {0};
+
+    int status = parse_string(cases[i].in, cases[i].in_len, got, sizeof(got));
+    if (cases[i].want == NULL) {
+      if (status == 0) {
+        fprintf(stderr, "parse_string() = (\"%s\", 0), want error\n", got);
+        ret = -1;
+      }
+    } else /* if cases[i].want != NULL */ {
+      if (status != 0) {
+        fprintf(stderr, "parse_string() = %d, want 0\n", status);
+        ret = -1;
+      } else if (strcmp(got, cases[i].want) != 0) {
+        fprintf(stderr, "parse_string() = (\"%s\", 0), want (\"%s\", 0)\n", got,
+                cases[i].want);
+        ret = -1;
+      }
+    }
+  }
+
+  return ret;
+}
+
+static int test_parse_values() {
+  int ret = 0;
+
+  uint8_t testcase[] = {
+      // 0, 6,                          // pkg type
+      // 0, 33,                         // pkg len
+      0, 3,                         // num values
+      1, 2, 1,                      // gauge, derive, gauge
+      0, 0, 0, 0, 0, 0, 0x45, 0x40, // 42.0
+      0, 0, 0, 0, 0, 0, 0x7a, 0x69, // 31337
+      0, 0, 0, 0, 0, 0, 0xf8, 0x7f, // NaN
+  };
+
+  lcc_value_list_t vl = LCC_VALUE_LIST_INIT;
+  int status = parse_values(testcase, sizeof(testcase), &vl);
+  if (status != 0) {
+    fprintf(stderr, "parse_values() = %d, want 0\n", status);
+    return -1;
+  }
+
+  if (vl.values_len != 3) {
+    fprintf(stderr, "parse_values(): vl.values_len = %zu, want 3\n",
+            vl.values_len);
+    return -1;
+  }
+
+  int want_types[] = {LCC_TYPE_GAUGE, LCC_TYPE_DERIVE, LCC_TYPE_GAUGE};
+  for (size_t i = 0; i < sizeof(want_types) / sizeof(want_types[0]); i++) {
+    if (vl.values_types[i] != want_types[i]) {
+      fprintf(stderr, "parse_values(): vl.values_types[%zu] = %d, want %d\n", i,
+              vl.values_types[i], want_types[i]);
+      ret = -1;
+    }
+  }
+
+  if (vl.values[0].gauge != 42.0) {
+    fprintf(stderr, "parse_values(): vl.values[0] = %g, want 42\n",
+            vl.values[0].gauge);
+    ret = -1;
+  }
+  if (vl.values[1].derive != 31337) {
+    fprintf(stderr, "parse_values(): vl.values[1] = %" PRIu64 ", want 31337\n",
+            vl.values[1].derive);
+    ret = -1;
+  }
+  if (!isnan(vl.values[2].gauge)) {
+    fprintf(stderr, "parse_values(): vl.values[2] = %g, want NaN\n",
+            vl.values[2].gauge);
+    ret = -1;
+  }
+
+  free(vl.values);
+  free(vl.values_types);
+
+  return ret;
+}
+
+int main(void) {
+  int ret = 0;
+
+  printf("libcollectdclient/server_test.c\n");
+
+  int status;
+  if ((status = test_network_parse())) {
+    ret = status;
+  }
+  if ((status = test_parse_time())) {
+    ret = status;
+  }
+  if ((status = test_parse_string())) {
+    ret = status;
+  }
+  if ((status = test_parse_values())) {
+    ret = status;
+  }
+
+  return ret;
+}