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apteryxd.c
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/**
* @file apteryx.c
* Server application for Apteryx.
*
* Copyright 2014, Allied Telesis Labs New Zealand, Ltd
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 3 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this library. If not, see <http://www.gnu.org/licenses/>
*/
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <unistd.h>
#include <ctype.h>
#include <errno.h>
#include <sys/poll.h>
#include <sys/wait.h>
#include <arpa/inet.h>
#include <malloc.h>
#include "apteryx.h"
#include "internal.h"
/* Run while true */
static bool running = true;
/* RPC Service */
rpc_instance rpc = NULL;
rpc_instance proxy_rpc = NULL;
/* Statistics and debug */
counters_t counters = {};
/* Synchronise validation */
static pthread_mutex_t validating;
static bool
check_indexed_path (const char *indexed, const char *path, int path_length)
{
/* Indexed paths must be longer than the path we searched for. */
if (strlen (indexed) <= path_length)
{
return false;
}
/* Indexed paths must start with the search path. */
if (strncmp (path, indexed, path_length))
{
return false;
}
/* Indexed paths must only fill in one directory below. */
if (strchr (indexed + path_length, '/'))
{
return false;
}
return true;
}
/* This function returns true if indexers were called (list may still be NULL) */
static bool
index_get (const char *path, GList **result)
{
GList *indexers = NULL;
GList *results = NULL;
GList *iter = NULL;
uint64_t start, duration;
bool res;
const char *rpath;
int path_length = strlen (path);
/* Retrieve a list of providers for this path */
indexers = config_get_indexers (path);
if (!indexers)
{
*result = NULL;
return false;
}
/* Find the first good indexer */
for (iter = indexers; iter; iter = g_list_next (iter))
{
cb_info_t *indexer = iter->data;
rpc_client rpc_client;
rpc_message_t msg = {};
/* Check for local provider */
if (indexer->id == getpid ())
{
apteryx_index_callback cb = (apteryx_index_callback) (long) indexer->ref;
DEBUG ("INDEX LOCAL \"%s\" (0x%"PRIx64",0x%"PRIx64")\n",
indexer->path, indexer->id, indexer->ref);
results = cb (path);
break;
}
DEBUG ("INDEX CB \"%s\" (0x%"PRIx64",0x%"PRIx64")\n",
indexer->path, indexer->id, indexer->ref);
/* Setup IPC */
rpc_client = rpc_client_connect (rpc, indexer->uri);
if (!rpc_client)
{
/* Throw away the no good validator */
ERROR ("Invalid INDEX CB %s (0x%"PRIx64",0x%"PRIx64")\n",
indexer->path, indexer->id, indexer->ref);
cb_disable (indexer);
INC_COUNTER (counters.indexed_no_handler);
continue;
}
/* Do remote index */
rpc_msg_encode_uint8 (&msg, MODE_INDEX);
rpc_msg_encode_uint64 (&msg, indexer->ref);
rpc_msg_encode_string (&msg, path);
start = get_time_us ();
res = rpc_msg_send (rpc_client, &msg);
duration = get_time_us () - start;
if (!res)
{
ERROR ("INDEX: No response\n");
rpc_msg_reset (&msg);
rpc_client_release (rpc, rpc_client, false);
INC_COUNTER (counters.indexed_timeout);
continue;
}
while ((rpath = rpc_msg_decode_string (&msg)) != NULL)
{
if (check_indexed_path(rpath, path, path_length))
{
results = g_list_prepend (results, (gpointer) strdup (rpath));
}
}
rpc_msg_reset (&msg);
rpc_client_release (rpc, rpc_client, true);
/* Result */
INC_COUNTER (counters.indexed);
if (!GET_COUNTER (indexer->min) || duration < GET_COUNTER (indexer->min))
SET_COUNTER (indexer->min, duration);
if (duration > GET_COUNTER (indexer->max))
SET_COUNTER (indexer->max, duration);
ADD_COUNTER (indexer->total, duration);
INC_COUNTER (indexer->count);
if (results)
break;
}
g_list_free_full (indexers, (GDestroyNotify) cb_release);
*result = results;
return true;
}
static int
validate_set (const char *path, const char *value)
{
GList *validators = NULL;
GList *iter = NULL;
int32_t result = 0;
uint64_t start, duration;
bool res;
/* Retrieve a list of validators for this path */
validators = config_get_validators (path);
if (!validators)
return 0;
/* Protect sensitive values with this lock - released in apteryx_set */
pthread_mutex_lock (&validating);
/* Call each validator */
for (iter = validators; iter; iter = g_list_next (iter))
{
cb_info_t *validator = iter->data;
rpc_client rpc_client;
rpc_message_t msg = {};
/* Check for local validator */
if (validator->id == getpid ())
{
apteryx_watch_callback cb = (apteryx_watch_callback) (long) validator->ref;
DEBUG ("VALIDATE LOCAL \"%s\" (0x%"PRIx64",0x%"PRIx64")\n",
validator->path, validator->id, validator->ref);
cb (path, value);
continue;
}
DEBUG ("VALIDATE CB %s = %s (0x%"PRIx64",0x%"PRIx64")\n",
validator->path, value, validator->id, validator->ref);
/* Setup IPC */
rpc_client = rpc_client_connect (rpc, validator->uri);
if (!rpc_client)
{
/* Throw away the no good validator */
ERROR ("Invalid VALIDATE CB %s (0x%"PRIx64",0x%"PRIx64")\n",
validator->path, validator->id, validator->ref);
cb_disable (validator);
INC_COUNTER (counters.validated_no_handler);
continue;
}
/* Do remote validate */
rpc_msg_encode_uint8 (&msg, MODE_VALIDATE);
rpc_msg_encode_uint64 (&msg, validator->ref);
rpc_msg_encode_string (&msg, path);
if (value)
rpc_msg_encode_string (&msg, value);
else
rpc_msg_encode_string (&msg, "");
start = get_time_us ();
res = rpc_msg_send (rpc_client, &msg);
duration = get_time_us () - start;
if (!res)
{
INC_COUNTER (counters.validated_timeout);
ERROR ("Failed to validate for path \"%s\"\n", (char *)path);
rpc_client_release (rpc, rpc_client, false);
rpc_msg_reset (&msg);
result = errno;
break;
}
rpc_client_release (rpc, rpc_client, true);
result = (int32_t) rpc_msg_decode_uint64 (&msg);
rpc_msg_reset (&msg);
/* Result */
INC_COUNTER (counters.validated);
if (!GET_COUNTER (validator->min) || duration < GET_COUNTER (validator->min))
SET_COUNTER (validator->min, duration);
if (duration > GET_COUNTER (validator->max))
SET_COUNTER (validator->max, duration);
ADD_COUNTER (validator->total, duration);
INC_COUNTER (validator->count);
if (result < 0)
{
DEBUG ("Set of %s to %s rejected by process %"PRIu64" (%d)\n",
(char *)path, (char*)value, validator->id, result);
break;
}
}
g_list_free_full (validators, (GDestroyNotify) cb_release);
/* This one is fine, but lock is still held */
return result < 0 ? result : 1;
}
static void
send_watch_notification (cb_info_t *watcher, GNode *root, int ack)
{
rpc_client rpc_client;
rpc_message_t msg = {};
uint64_t start, duration;
bool res;
/* IPC */
rpc_client = rpc_client_connect (rpc, watcher->uri);
if (!rpc_client)
{
/* Throw away the no good validator */
ERROR ("Invalid WATCH CB %s (0x%"PRIx64",0x%"PRIx64")\n",
watcher->path, watcher->id, watcher->ref);
cb_disable (watcher);
INC_COUNTER (counters.watched_no_handler);
return;
}
rpc_msg_encode_uint8 (&msg, ack ? MODE_WATCH_WITH_ACK : MODE_WATCH);
rpc_msg_encode_uint64 (&msg, watcher->ref);
rpc_msg_encode_tree (&msg, root);
start = get_time_us ();
res = rpc_msg_send (rpc_client, &msg);
duration = get_time_us () - start;
if (!res)
{
INC_COUNTER (counters.watched_timeout);
ERROR ("Failed to notify watcher for path \"%s\"\n", watcher->path);
rpc_client_release (rpc, rpc_client, false);
}
else
{
rpc_client_release (rpc, rpc_client, true);
}
rpc_msg_reset (&msg);
INC_COUNTER (counters.watched);
if (!GET_COUNTER (watcher->min) || duration < GET_COUNTER (watcher->min))
SET_COUNTER (watcher->min, duration);
if (duration > GET_COUNTER (watcher->max))
SET_COUNTER (watcher->max, duration);
ADD_COUNTER (watcher->total, duration);
INC_COUNTER (watcher->count);
}
static int
local_callback (GNode *node, gpointer _cb)
{
apteryx_watch_callback cb = _cb;
char *path = apteryx_node_path(node->parent);
if (!node->data || ((char*)node->data)[0] == '\0')
cb (path, NULL);
else
cb (path, node->data);
g_free(path);
return true;
}
static void
notify_watchers (GNode *root, bool ack, uint64_t ns, uint64_t pid)
{
if (!root)
return;
GList *watchers = config_get_watchers_tree(root);
for (GList *iter = watchers; iter; iter = g_list_next (iter))
{
struct cb_tree_info *watcher = iter->data;
cb_info_t *watcher_info = watcher->cb;
if (watcher_info->id == getpid ())
{
apteryx_watch_callback cb = (apteryx_watch_callback) (long) watcher_info->ref;
DEBUG ("WATCH LOCAL \"%s\" (0x%"PRIx64",0x%"PRIx64")\n",
watcher_info->path, watcher_info->id, watcher_info->ref);
g_node_traverse (watcher->data, G_PRE_ORDER, G_TRAVERSE_LEAVES, -1, local_callback, cb);
continue;
}
/* Skip watchers that don't want to be notified for their own sets */
if ((watcher_info->flags & WATCH_F_MASK_MYSELF) && watcher_info->ns == ns && watcher_info->id == pid)
{
continue;
}
send_watch_notification (watcher_info, watcher->data, ack);
}
g_list_free_full (watchers, (GDestroyNotify) cb_tree_release);
}
static char *
get_refresher_path (const char *path, cb_info_t *refresher)
{
const char *rpath = refresher->path;
char *cpath = g_malloc0 (strlen (path) + strlen (rpath) + 1);
const char *wild;
int offset = 0;
/* Resolve any wildcards in either path */
while (*path && *rpath)
{
if (*path == '*' && *rpath == '*')
{
while (*path)
path++;
while (*rpath)
rpath++;
}
else if (*path == '*')
{
while (*rpath != '/' && *rpath != '\0')
{
cpath[offset++] = *rpath;
rpath++;
}
path++;
}
else if (*rpath == '*')
{
while (*path != '/' && *path != '\0')
{
cpath[offset++] = *path;
path++;
}
rpath++;
}
else
{
cpath[offset++] = *rpath;
rpath++;
path++;
}
}
/* Append any left over requester path if the refresher is not single level */
if (*path && rpath[-1] != '/')
{
/* Append any requester path that we do not need to resolve */
while (*path && *path != '*')
{
cpath[offset++] = *path;
path++;
}
}
/* Append any refresher path that we do not need to resolve */
while (*rpath && *rpath != '*')
{
cpath[offset++] = *rpath;
rpath++;
}
/* Check there are not unresolved wildcards */
if ((*rpath && ((wild = strchr (rpath, '*')) != NULL) && wild != &rpath[strlen (rpath)] - 1) ||
(*path && ((wild = strchr (path, '*')) != NULL) && wild != &path[strlen (path)] - 1))
{
free (cpath);
cpath = NULL;
}
return cpath;
}
static bool
call_refreshers (const char *path, bool dry_run)
{
GList *refreshers = NULL;
GList *iter = NULL;
uint64_t now;
uint64_t timeout = 0;
bool refresh_due = false;
char *cpath = NULL;
/* Retrieve a list of refreshers for this path */
refreshers = config_get_refreshers (path);
if (!refreshers)
return false;
/* Get the time of the request */
now = get_time_us ();
/* Call each refresher */
for (iter = refreshers; iter; iter = g_list_next (iter))
{
cb_info_t *refresher = iter->data;
rpc_client rpc_client;
rpc_message_t msg = {};
uint64_t start, duration;
bool res;
pthread_mutex_lock (&refresher->lock);
/* Get a path suitable for passing to the refresher */
cpath = get_refresher_path (path, refresher);
if (!cpath)
{
DEBUG ("Not enough state to refresh %s for %s\n", refresher->path, path);
goto unlock;
}
DEBUG ("PATH:%s RPATH:%s CPATH:%s\n", path, refresher->path, cpath);
/* We can skip this refresher if the refresher has been called recently AND
* the last call was for a path equal to or less specific than this one */
if (now < (refresher->timestamp + refresher->timeout) &&
(strncmp (refresher->last_path, cpath, strlen (refresher->last_path)) == 0 &&
(*(refresher->last_path + strlen (refresher->last_path) - 1) == '/' ||
*(cpath + strlen (refresher->last_path)) == '/' ||
*(cpath + strlen (refresher->last_path)) == '\0')))
{
DEBUG ("Not refreshing %s (now:%"PRIu64" < (ts:%"PRIu64" + to:%"PRIu64"))\n",
cpath, now, refresher->timestamp, refresher->timeout);
goto unlock;
}
if (now >= (refresher->timestamp + refresher->timeout))
{
DEBUG ("Refreshing %s (now:%"PRIu64" >= (ts:%"PRIu64" + to:%"PRIu64"))\n",
cpath, now, refresher->timestamp, refresher->timeout);
}
else
{
DEBUG ("Refreshing %s (< %s)\n", cpath, refresher->last_path);
}
/* Check for local refresher */
if (refresher->id == getpid ())
{
apteryx_refresh_callback cb = (apteryx_refresh_callback) (long) refresher->ref;
DEBUG ("REFRESH LOCAL \"%s\" (0x%"PRIx64",0x%"PRIx64")\n",
refresher->path, refresher->id, refresher->ref);
timeout = cb (cpath);
if (refresher->timeout == 0 || timeout < refresher->timeout)
refresher->timeout = timeout;
/* Record the last time we ran this refresher */
refresher->timestamp = now;
/* Record the path we refreshed (without any trailing /'s)*/
if (refresher->last_path)
free (refresher->last_path);
refresher->last_path = g_strdup (cpath);
goto unlock;
}
DEBUG ("REFRESH CB %s (%s 0x%"PRIx64",0x%"PRIx64",%s)\n",
cpath, refresher->path, refresher->id, refresher->ref, refresher->uri);
/* IPC */
if (!dry_run)
{
rpc_client = rpc_client_connect (rpc, refresher->uri);
if (!rpc_client)
{
/* Throw away the no good validator */
ERROR ("Invalid REFRESH CB %s (0x%"PRIx64",0x%"PRIx64")\n",
refresher->path, refresher->id, refresher->ref);
cb_disable (refresher);
INC_COUNTER (counters.refreshed_no_handler);
goto unlock;
}
rpc_msg_encode_uint8 (&msg, MODE_REFRESH);
rpc_msg_encode_uint64 (&msg, refresher->ref);
rpc_msg_encode_string (&msg, cpath);
start = get_time_us ();
res = rpc_msg_send (rpc_client, &msg);
duration = get_time_us () - start;
if (!res)
{
INC_COUNTER (counters.refreshed_timeout);
ERROR ("Failed to notify refresher for path \"%s\"\n", (char *) path);
rpc_client_release (rpc, rpc_client, false);
}
else
{
rpc_client_release (rpc, rpc_client, true);
timeout = rpc_msg_decode_uint64 (&msg);
DEBUG ("REFRESH again in %"PRIu64"us\n", timeout);
if (refresher->timeout == 0 || timeout < refresher->timeout)
refresher->timeout = timeout;
/* Record the last time we ran this refresher */
refresher->timestamp = now;
/* Record the path we refreshed (without any trailing /'s)*/
if (refresher->last_path)
free (refresher->last_path);
refresher->last_path = g_strdup (cpath);
}
rpc_msg_reset (&msg);
INC_COUNTER (counters.refreshed);
if (!GET_COUNTER (refresher->min) || duration < GET_COUNTER (refresher->min))
SET_COUNTER (refresher->min, duration);
if (duration > GET_COUNTER (refresher->max))
SET_COUNTER (refresher->max, duration);
ADD_COUNTER (refresher->total, duration);
INC_COUNTER (refresher->count);
}
else
{
refresh_due = true;
}
unlock:
free (cpath);
pthread_mutex_unlock (&refresher->lock);
}
g_list_free_full (refreshers, (GDestroyNotify) cb_release);
return refresh_due;
}
static char *
provide_get (const char *path)
{
GList *providers = NULL;
char *value = NULL;
GList *iter = NULL;
/* Retrieve a list of providers for this path */
providers = config_get_providers (path);
if (!providers)
return NULL;
/* Find the first good provider */
for (iter = providers; iter; iter = g_list_next (iter))
{
cb_info_t *provider = iter->data;
rpc_client rpc_client;
rpc_message_t msg = {};
uint64_t start, duration;
bool res;
/* Check for local provider */
if (provider->id == getpid ())
{
apteryx_provide_callback cb = (apteryx_provide_callback) (long) provider->ref;
DEBUG ("PROVIDE LOCAL \"%s\" (0x%"PRIx64",0x%"PRIx64")\n",
provider->path, provider->id, provider->ref);
value = cb (path);
break;
}
DEBUG ("PROVIDE CB \"%s\" (0x%"PRIx64",0x%"PRIx64")\n",
provider->path, provider->id, provider->ref);
/* Setup IPC */
rpc_client = rpc_client_connect (rpc, provider->uri);
if (!rpc_client)
{
/* Throw away the no good validator */
ERROR ("Invalid PROVIDE CB %s (0x%"PRIx64",0x%"PRIx64")\n",
provider->path, provider->id, provider->ref);
cb_disable (provider);
INC_COUNTER (counters.provided_no_handler);
continue;
}
/* Do remote get */
rpc_msg_encode_uint8 (&msg, MODE_PROVIDE);
rpc_msg_encode_uint64 (&msg, provider->ref);
rpc_msg_encode_string (&msg, path);
start = get_time_us ();
res = rpc_msg_send (rpc_client, &msg);
duration = get_time_us () - start;
if (!res)
{
INC_COUNTER (counters.provided_timeout);
ERROR ("No response from provider for path \"%s\"\n", (char *)path);
rpc_client_release (rpc, rpc_client, false);
}
else
{
rpc_client_release (rpc, rpc_client, true);
value = rpc_msg_decode_string (&msg);
if (value)
value = strdup (value);
}
rpc_msg_reset (&msg);
INC_COUNTER (counters.provided);
if (!GET_COUNTER (provider->min) || duration < GET_COUNTER (provider->min))
SET_COUNTER (provider->min, duration);
if (duration > GET_COUNTER (provider->max))
SET_COUNTER (provider->max, duration);
ADD_COUNTER (provider->total, duration);
INC_COUNTER (provider->count);
if (value)
break;
}
g_list_free_full (providers, (GDestroyNotify) cb_release);
return value;
}
static void*
find_proxy (const char **path, cb_info_t **proxy_pt)
{
rpc_client rpc_client;
GList *proxies = NULL;
GList *iter = NULL;
*proxy_pt = NULL;
/* Retrieve a list of proxies for this path */
proxies = config_get_proxies (*path);
if (!proxies)
return NULL;
/* Find the first good proxy */
for (iter = proxies; iter; iter = g_list_next (iter))
{
cb_info_t *proxy = iter->data;
int len = strlen (proxy->path);
/* Setup IPC */
rpc_client = rpc_client_connect (proxy_rpc, proxy->uri);
if (!rpc_client)
{
ERROR ("Invalid PROXY CB %s (%s)\n", proxy->path, proxy->uri);
cb_disable (proxy);
INC_COUNTER (counters.proxied_no_handler);
continue;
}
INC_COUNTER (counters.proxied);
INC_COUNTER (proxy->count);
/* Strip proxied path */
if (proxy->path[len-1] == '*')
len -= 1;
if (proxy->path[len-1] == '/')
len -= 1;
*path = *path + len;
DEBUG ("PROXY CB \"%s\" to \"%s\"\n", *path, proxy->uri);
*proxy_pt = proxy;
break;
}
g_list_free_full (proxies, (GDestroyNotify) cb_release);
return rpc_client;
}
static int32_t
proxy_set (const char *path, const char *value, uint64_t ts)
{
rpc_client rpc_client;
rpc_message_t msg = {};
int32_t result = 1;
cb_info_t *proxy = NULL;
/* Find and connect to a proxied instance */
rpc_client = find_proxy (&path, &proxy);
if (!rpc_client)
{
/* A positive value is interpreted as proxy not found */
return 1;
}
/* Do remote set */
rpc_msg_encode_uint8 (&msg, MODE_SET);
rpc_msg_encode_uint64 (&msg, ts);
rpc_msg_encode_uint8 (&msg, rpc_value);
rpc_msg_encode_string (&msg, path);
if (value)
rpc_msg_encode_string (&msg, value);
else
rpc_msg_encode_string (&msg, "");
if (!rpc_msg_send (rpc_client, &msg))
{
ERROR ("PROXY SET: No response\n");
rpc_msg_reset (&msg);
rpc_client_release (rpc, rpc_client, false);
}
else
{
result = rpc_msg_decode_uint64 (&msg);
rpc_msg_reset (&msg);
if (result < 0)
{
DEBUG ("PROXY SET: Error response: %s\n", strerror (-result));
errno = result;
}
rpc_client_release (rpc, rpc_client, true);
}
return result;
}
static char *
proxy_get (const char *path)
{
rpc_client rpc_client;
rpc_message_t msg = {};
cb_info_t *proxy = NULL;
char *value = NULL;
/* Find and connect to a proxied instance */
rpc_client = find_proxy (&path, &proxy);
if (!rpc_client)
return NULL;
/* Do remote get */
rpc_msg_encode_uint8 (&msg, MODE_GET);
rpc_msg_encode_string (&msg, path);
if (!rpc_msg_send (rpc_client, &msg))
{
INC_COUNTER (counters.proxied_timeout);
ERROR ("No response from proxy for path \"%s\"\n", (char *)path);
rpc_client_release (rpc, rpc_client, false);
}
else
{
rpc_client_release (rpc, rpc_client, true);
value = rpc_msg_decode_string (&msg);
if (value)
value = strdup (value);
}
rpc_msg_reset (&msg);
return value;
}
static GList *
proxy_search (const char *path)
{
rpc_client rpc_client;
rpc_message_t msg = {};
GList *paths = NULL;
const char *in_path = path;
cb_info_t *proxy = NULL;
/* Find and connect to a proxied instance */
rpc_client = find_proxy (&path, &proxy);
if (!rpc_client)
return NULL;
/* Do remote search */
rpc_msg_encode_uint8 (&msg, MODE_SEARCH);
rpc_msg_encode_string (&msg, path);
if (!rpc_msg_send (rpc_client, &msg))
{
INC_COUNTER (counters.proxied_timeout);
ERROR ("No response from proxy for path \"%s\"\n", (char *)path);
rpc_client_release (rpc, rpc_client, false);
}
else
{
/* Prepend local path to start of all search results */
size_t path_len = path - in_path;
char *local_path = g_malloc0 (path_len + 1);
strncpy (local_path, in_path, path_len);
while ((path = rpc_msg_decode_string (&msg)) != NULL)
{
char *tmp = g_strdup_printf ("%s%s", local_path, path);
paths = g_list_prepend (paths, (gpointer) tmp);
}
g_free (local_path);
rpc_client_release (rpc, rpc_client, true);
}
rpc_msg_reset (&msg);
return paths;
}
typedef struct {
GList *paths;
GList *values;
} key_value_lists;
static char *
_node_to_path (GNode *node, char **buf)
{
/* don't put a trailing / on */
char end = 0;
if (!*buf)
{
*buf = strdup ("");
end = 1;
}
if (node && node->parent)
_node_to_path (node->parent, buf);
char *tmp = NULL;
char *key = node ? node->data : "";
if (key[0] == '/' && key[1] == '\0')
key++;
if (asprintf (&tmp, "%s%s%s", *buf ? : "",
key,
end ? "" : "/") >= 0)
{
free (*buf);
*buf = tmp;
}
return tmp;
}
static gboolean
_gather_values (GNode *node, gpointer data)
{
key_value_lists *lists = (key_value_lists *) data;
if (APTERYX_HAS_VALUE(node))
{
char *path = NULL;
/* Create the apteryx path for this node. */
_node_to_path (node, &path);
lists->paths = g_list_prepend (lists->paths, path);
lists->values = g_list_prepend (lists->values, g_strdup (APTERYX_VALUE (node)));
}
return FALSE;
}
static bool
proxy_traverse (GList **paths, GList **values, const char *path)
{
rpc_client rpc_client;
rpc_message_t msg = { 0 };
const char *in_path = path;
key_value_lists lists = { NULL, NULL };
GNode *root = NULL;
cb_info_t *proxy = NULL;
/* Find and connect to a proxied instance */
rpc_client = find_proxy (&path, &proxy);
if (!rpc_client)
return false;
/* Do remote traverse */
rpc_msg_encode_uint8 (&msg, MODE_TRAVERSE);
rpc_msg_encode_string (&msg, path);
if (!rpc_msg_send (rpc_client, &msg))
{
INC_COUNTER (counters.proxied_timeout);
ERROR ("No response from proxy for path \"%s\"\n", (char *)path);
rpc_msg_reset (&msg);
rpc_client_release (rpc, rpc_client, false);
return false;
}
root = rpc_msg_decode_tree (&msg);
/* Prepend this remote tree with our proxy path */
if (root)
{
gchar *new_root_key = g_strdup_printf("%.*s%s", (int)(path - in_path), in_path, APTERYX_NAME(root));
g_free(root->data);
root->data = new_root_key;
g_node_traverse (root, G_PRE_ORDER, G_TRAVERSE_NON_LEAFS, -1, _gather_values, &lists);
}
*paths = lists.paths;
*values = lists.values;
rpc_msg_reset (&msg);
rpc_client_release (rpc, rpc_client, true);
apteryx_free_tree(root);
return true;
}
static GNode *
proxy_query (GNode *query, const char *path)
{
rpc_client rpc_client;
rpc_message_t msg = {};
cb_info_t *proxy = NULL;
GNode *node = NULL;
GNode *pnode = NULL;
GNode *pquery = NULL;
GNode *root = NULL;
/* Find and connect to a proxied instance */
rpc_client = find_proxy (&path, &proxy);
if (!rpc_client) {
return NULL;
}
/* Need to trim off root of the query tree, up until the proxied node */
int len = strlen (proxy->path);
if (proxy->path[len-1] == '*')
len -= 1;
if (proxy->path[len-1] == '/')
len -= 1;
char *local_path = g_malloc0 (len + 1);
strncpy (local_path, proxy->path, len);
/* Create a temp query without the proxy path */
node = apteryx_path_node (query->children, local_path);
pnode = g_node_first_child (node);
g_node_unlink (pnode);
pquery = APTERYX_NODE (NULL, "");
g_node_prepend (pquery, pnode);
/* Do remote query */
rpc_msg_encode_uint8 (&msg, MODE_QUERY);
rpc_msg_encode_tree (&msg, pquery);
/* Restore the original query */
g_node_unlink (pnode);
g_node_destroy (pquery);
g_node_prepend (node, pnode);
if (!rpc_msg_send (rpc_client, &msg))
{
INC_COUNTER (counters.proxied_timeout);
ERROR ("No response from proxy for path \"%s\"\n", (char *)path);
rpc_client_release (rpc, rpc_client, false);
g_free (local_path);
return NULL;
}
root = rpc_msg_decode_tree (&msg);
/* Prepend this remote tree with our proxy path */
if (root)
{
gchar *new_root_key = g_strdup_printf("%s%s", local_path, APTERYX_NAME(root));
g_free(root->data);
root->data = new_root_key;
}
g_free (local_path);
rpc_msg_reset (&msg);
rpc_client_release (rpc, rpc_client, true);
return root;
}
static int32_t
proxy_prune (const char *path)
{
rpc_client rpc_client;
rpc_message_t msg = {};
cb_info_t *proxy = NULL;
int32_t result = 0;
/* Find and connect to a proxied instance */
rpc_client = find_proxy (&path, &proxy);
if (!rpc_client)
return 1;
/* Do remote prune */
rpc_msg_encode_uint8 (&msg, MODE_PRUNE);
rpc_msg_encode_string (&msg, path);
if (!rpc_msg_send (rpc_client, &msg))
{
ERROR ("PROXY PRUNE: No response\n");
rpc_msg_reset (&msg);
rpc_client_release (rpc, rpc_client, false);