- /*-
- * Copyright 2016 Vsevolod Stakhov
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
- #include "config.h"
- #include "upstream.h"
- #include "ottery.h"
- #include "ref.h"
- #include "cfg_file.h"
- #include "rdns.h"
- #include "cryptobox.h"
- #include "utlist.h"
- #include "logger.h"
- #include "contrib/librdns/rdns.h"
- #include "contrib/mumhash/mum.h"
-
- #include <math.h>
-
-
- struct upstream_inet_addr_entry {
- rspamd_inet_addr_t *addr;
- guint priority;
- struct upstream_inet_addr_entry *next;
- };
-
- struct upstream_addr_elt {
- rspamd_inet_addr_t *addr;
- guint priority;
- guint errors;
- };
-
- struct upstream_list_watcher {
- rspamd_upstream_watch_func func;
- GFreeFunc dtor;
- gpointer ud;
- enum rspamd_upstreams_watch_event events_mask;
- struct upstream_list_watcher *next, *prev;
- };
-
- struct upstream {
- guint weight;
- guint cur_weight;
- guint errors;
- guint checked;
- guint dns_requests;
- gint active_idx;
- guint ttl;
- gchar *name;
- ev_timer ev;
- gdouble last_fail;
- gdouble last_resolve;
- gpointer ud;
- enum rspamd_upstream_flag flags;
- struct upstream_list *ls;
- GList *ctx_pos;
- struct upstream_ctx *ctx;
-
- struct {
- GPtrArray *addr; /* struct upstream_addr_elt */
- guint cur;
- } addrs;
-
- struct upstream_inet_addr_entry *new_addrs;
- gpointer data;
- gchar uid[8];
- ref_entry_t ref;
- #ifdef UPSTREAMS_THREAD_SAFE
- rspamd_mutex_t *lock;
- #endif
- };
-
- struct upstream_limits {
- gdouble revive_time;
- gdouble revive_jitter;
- gdouble error_time;
- gdouble dns_timeout;
- gdouble lazy_resolve_time;
- guint max_errors;
- guint dns_retransmits;
- };
-
- struct upstream_list {
- gchar *ups_line;
- struct upstream_ctx *ctx;
- GPtrArray *ups;
- GPtrArray *alive;
- struct upstream_list_watcher *watchers;
- guint64 hash_seed;
- const struct upstream_limits *limits;
- enum rspamd_upstream_flag flags;
- guint cur_elt;
- enum rspamd_upstream_rotation rot_alg;
- #ifdef UPSTREAMS_THREAD_SAFE
- rspamd_mutex_t *lock;
- #endif
- };
-
- struct upstream_ctx {
- struct rdns_resolver *res;
- struct ev_loop *event_loop;
- struct upstream_limits limits;
- GQueue *upstreams;
- gboolean configured;
- rspamd_mempool_t *pool;
- ref_entry_t ref;
- };
-
- #ifndef UPSTREAMS_THREAD_SAFE
- #define RSPAMD_UPSTREAM_LOCK(x) do { } while (0)
- #define RSPAMD_UPSTREAM_UNLOCK(x) do { } while (0)
- #else
- #define RSPAMD_UPSTREAM_LOCK(x) rspamd_mutex_lock(x->lock)
- #define RSPAMD_UPSTREAM_UNLOCK(x) rspamd_mutex_unlock(x->lock)
- #endif
-
- #define msg_debug_upstream(...) rspamd_conditional_debug_fast (NULL, NULL, \
- rspamd_upstream_log_id, "upstream", upstream->uid, \
- G_STRFUNC, \
- __VA_ARGS__)
- #define msg_info_upstream(...) rspamd_default_log_function (G_LOG_LEVEL_INFO, \
- "upstream", upstream->uid, \
- G_STRFUNC, \
- __VA_ARGS__)
-
- INIT_LOG_MODULE(upstream)
-
- /* 4 errors in 10 seconds */
- #define DEFAULT_MAX_ERRORS 4
- static const guint default_max_errors = DEFAULT_MAX_ERRORS;
- #define DEFAULT_REVIVE_TIME 60
- static const gdouble default_revive_time = DEFAULT_REVIVE_TIME;
- #define DEFAULT_REVIVE_JITTER 0.4
- static const gdouble default_revive_jitter = DEFAULT_REVIVE_JITTER;
- #define DEFAULT_ERROR_TIME 10
- static const gdouble default_error_time = DEFAULT_ERROR_TIME;
- #define DEFAULT_DNS_TIMEOUT 1.0
- static const gdouble default_dns_timeout = DEFAULT_DNS_TIMEOUT;
- #define DEFAULT_DNS_RETRANSMITS 2
- static const guint default_dns_retransmits = DEFAULT_DNS_RETRANSMITS;
- /* TODO: make it configurable */
- #define DEFAULT_LAZY_RESOLVE_TIME 3600.0
- static const gdouble default_lazy_resolve_time = DEFAULT_LAZY_RESOLVE_TIME;
-
- static const struct upstream_limits default_limits = {
- .revive_time = DEFAULT_REVIVE_TIME,
- .revive_jitter = DEFAULT_REVIVE_JITTER,
- .error_time = DEFAULT_ERROR_TIME,
- .dns_timeout = DEFAULT_DNS_TIMEOUT,
- .dns_retransmits = DEFAULT_DNS_RETRANSMITS,
- .max_errors = DEFAULT_MAX_ERRORS,
- .lazy_resolve_time = DEFAULT_LAZY_RESOLVE_TIME,
- };
-
- static void rspamd_upstream_lazy_resolve_cb (struct ev_loop *, ev_timer *, int );
-
- void
- rspamd_upstreams_library_config (struct rspamd_config *cfg,
- struct upstream_ctx *ctx,
- struct ev_loop *event_loop,
- struct rdns_resolver *resolver)
- {
- g_assert (ctx != NULL);
- g_assert (cfg != NULL);
-
- if (cfg->upstream_error_time) {
- ctx->limits.error_time = cfg->upstream_error_time;
- }
- if (cfg->upstream_max_errors) {
- ctx->limits.max_errors = cfg->upstream_max_errors;
- }
- if (cfg->upstream_revive_time) {
- ctx->limits.revive_time = cfg->upstream_max_errors;
- }
- if (cfg->upstream_lazy_resolve_time) {
- ctx->limits.lazy_resolve_time = cfg->upstream_lazy_resolve_time;
- }
- if (cfg->dns_retransmits) {
- ctx->limits.dns_retransmits = cfg->dns_retransmits;
- }
- if (cfg->dns_timeout) {
- ctx->limits.dns_timeout = cfg->dns_timeout;
- }
-
- ctx->event_loop = event_loop;
- ctx->res = resolver;
- ctx->configured = TRUE;
-
- /* Start lazy resolving */
- if (event_loop && resolver) {
- GList *cur;
- struct upstream *upstream;
-
- cur = ctx->upstreams->head;
-
- while (cur) {
- upstream = cur->data;
- if (!ev_can_stop (&upstream->ev) && upstream->ls &&
- !(upstream->flags & RSPAMD_UPSTREAM_FLAG_NORESOLVE)) {
- gdouble when;
-
- if (upstream->flags & RSPAMD_UPSTREAM_FLAG_SRV_RESOLVE) {
- /* Resolve them immediately ! */
- when = 0.0;
- }
- else {
- when = rspamd_time_jitter (upstream->ls->limits->lazy_resolve_time,
- upstream->ls->limits->lazy_resolve_time * .1);
- }
-
- ev_timer_init (&upstream->ev, rspamd_upstream_lazy_resolve_cb,
- when, 0);
- upstream->ev.data = upstream;
- ev_timer_start (ctx->event_loop, &upstream->ev);
- }
-
- cur = g_list_next (cur);
- }
- }
- }
-
- static void
- rspamd_upstream_ctx_dtor (struct upstream_ctx *ctx)
- {
- GList *cur;
- struct upstream *u;
-
- cur = ctx->upstreams->head;
-
- while (cur) {
- u = cur->data;
- u->ctx = NULL;
- u->ctx_pos = NULL;
- cur = g_list_next (cur);
- }
-
- g_queue_free (ctx->upstreams);
- rspamd_mempool_delete (ctx->pool);
- g_free (ctx);
- }
-
- void
- rspamd_upstreams_library_unref (struct upstream_ctx *ctx)
- {
- REF_RELEASE (ctx);
- }
-
- struct upstream_ctx *
- rspamd_upstreams_library_init (void)
- {
- struct upstream_ctx *ctx;
-
- ctx = g_malloc0 (sizeof (*ctx));
- memcpy (&ctx->limits, &default_limits, sizeof (ctx->limits));
- ctx->pool = rspamd_mempool_new (rspamd_mempool_suggest_size (),
- "upstreams", 0);
-
- ctx->upstreams = g_queue_new ();
- REF_INIT_RETAIN (ctx, rspamd_upstream_ctx_dtor);
-
- return ctx;
- }
-
- static gint
- rspamd_upstream_af_to_weight (const rspamd_inet_addr_t *addr)
- {
- int ret;
-
- switch (rspamd_inet_address_get_af (addr)) {
- case AF_UNIX:
- ret = 2;
- break;
- case AF_INET:
- ret = 1;
- break;
- default:
- ret = 0;
- break;
- }
-
- return ret;
- }
-
- /*
- * Select IPv4 addresses before IPv6
- */
- static gint
- rspamd_upstream_addr_sort_func (gconstpointer a, gconstpointer b)
- {
- const struct upstream_addr_elt *ip1 = *(const struct upstream_addr_elt **)a,
- *ip2 = *(const struct upstream_addr_elt **)b;
- gint w1, w2;
-
- if (ip1->priority == 0 && ip2->priority == 0) {
- w1 = rspamd_upstream_af_to_weight (ip1->addr);
- w2 = rspamd_upstream_af_to_weight (ip2->addr);
- }
- else {
- w1 = ip1->priority;
- w2 = ip2->priority;
- }
-
- /* Inverse order */
- return w2 - w1;
- }
-
- static void
- rspamd_upstream_set_active (struct upstream_list *ls, struct upstream *upstream)
- {
- RSPAMD_UPSTREAM_LOCK (ls);
- g_ptr_array_add (ls->alive, upstream);
- upstream->active_idx = ls->alive->len - 1;
-
- if (upstream->ctx && upstream->ctx->configured &&
- !(upstream->flags & RSPAMD_UPSTREAM_FLAG_NORESOLVE)) {
-
- if (ev_can_stop (&upstream->ev)) {
- ev_timer_stop (upstream->ctx->event_loop, &upstream->ev);
- }
-
- /* Start lazy (or not so lazy) names resolution */
- gdouble when;
-
- if (upstream->flags & RSPAMD_UPSTREAM_FLAG_SRV_RESOLVE) {
- /* Resolve them immediately ! */
- when = 0.0;
- }
- else {
- when = rspamd_time_jitter (upstream->ls->limits->lazy_resolve_time,
- upstream->ls->limits->lazy_resolve_time * .1);
- }
- ev_timer_init (&upstream->ev, rspamd_upstream_lazy_resolve_cb,
- when, 0);
- upstream->ev.data = upstream;
- msg_debug_upstream ("start lazy resolving for %s in %.0f seconds",
- upstream->name, when);
- ev_timer_start (upstream->ctx->event_loop, &upstream->ev);
- }
-
- RSPAMD_UPSTREAM_UNLOCK (ls);
- }
-
- static void
- rspamd_upstream_addr_elt_dtor (gpointer a)
- {
- struct upstream_addr_elt *elt = a;
-
- if (elt) {
- rspamd_inet_address_free (elt->addr);
- g_free (elt);
- }
- }
-
- static void
- rspamd_upstream_update_addrs (struct upstream *upstream)
- {
- guint addr_cnt, i, port;
- gboolean seen_addr, reset_errors = FALSE;
- struct upstream_inet_addr_entry *cur, *tmp;
- GPtrArray *new_addrs;
- struct upstream_addr_elt *addr_elt, *naddr;
-
- /*
- * We need first of all get the saved port, since DNS gives us no
- * idea about what port has been used previously
- */
- RSPAMD_UPSTREAM_LOCK (upstream);
-
- if (upstream->addrs.addr->len > 0 && upstream->new_addrs) {
- addr_elt = g_ptr_array_index (upstream->addrs.addr, 0);
- port = rspamd_inet_address_get_port (addr_elt->addr);
-
- /* Now calculate new addrs count */
- addr_cnt = 0;
- LL_FOREACH (upstream->new_addrs, cur) {
- addr_cnt++;
- }
-
- /* At 10% probability reset errors on addr elements */
- if (rspamd_random_double_fast () > 0.9) {
- reset_errors = TRUE;
- msg_debug_upstream ("reset errors on upstream %s",
- upstream->name);
- }
-
- new_addrs = g_ptr_array_new_full (addr_cnt, rspamd_upstream_addr_elt_dtor);
-
- /* Copy addrs back */
- LL_FOREACH (upstream->new_addrs, cur) {
- seen_addr = FALSE;
- naddr = NULL;
- /* Ports are problematic, set to compare in the next block */
- rspamd_inet_address_set_port (cur->addr, port);
-
- PTR_ARRAY_FOREACH (upstream->addrs.addr, i, addr_elt) {
- if (rspamd_inet_address_compare (addr_elt->addr, cur->addr, FALSE) == 0) {
- naddr = g_malloc0 (sizeof (*naddr));
- naddr->addr = cur->addr;
- naddr->errors = reset_errors ? 0 : addr_elt->errors;
- seen_addr = TRUE;
-
- break;
- }
- }
-
- if (!seen_addr) {
- naddr = g_malloc0 (sizeof (*naddr));
- naddr->addr = cur->addr;
- naddr->errors = 0;
- msg_debug_upstream ("new address for %s: %s",
- upstream->name,
- rspamd_inet_address_to_string_pretty (naddr->addr));
- }
- else {
- msg_debug_upstream ("existing address for %s: %s",
- upstream->name,
- rspamd_inet_address_to_string_pretty (cur->addr));
- }
-
- g_ptr_array_add (new_addrs, naddr);
- }
-
- /* Free old addresses */
- g_ptr_array_free (upstream->addrs.addr, TRUE);
-
- upstream->addrs.cur = 0;
- upstream->addrs.addr = new_addrs;
- g_ptr_array_sort (upstream->addrs.addr, rspamd_upstream_addr_sort_func);
- }
-
- LL_FOREACH_SAFE (upstream->new_addrs, cur, tmp) {
- /* Do not free inet address pointer since it has been transferred to up */
- g_free (cur);
- }
-
- upstream->new_addrs = NULL;
- RSPAMD_UPSTREAM_UNLOCK (upstream);
- }
-
- static void
- rspamd_upstream_dns_cb (struct rdns_reply *reply, void *arg)
- {
- struct upstream *up = (struct upstream *)arg;
- struct rdns_reply_entry *entry;
- struct upstream_inet_addr_entry *up_ent;
-
- if (reply->code == RDNS_RC_NOERROR) {
- entry = reply->entries;
-
- RSPAMD_UPSTREAM_LOCK (up);
- while (entry) {
-
- if (entry->type == RDNS_REQUEST_A) {
- up_ent = g_malloc0 (sizeof (*up_ent));
- up_ent->addr = rspamd_inet_address_new (AF_INET,
- &entry->content.a.addr);
- LL_PREPEND (up->new_addrs, up_ent);
- }
- else if (entry->type == RDNS_REQUEST_AAAA) {
- up_ent = g_malloc0 (sizeof (*up_ent));
- up_ent->addr = rspamd_inet_address_new (AF_INET6,
- &entry->content.aaa.addr);
- LL_PREPEND (up->new_addrs, up_ent);
- }
- entry = entry->next;
- }
-
- RSPAMD_UPSTREAM_UNLOCK (up);
- }
-
- up->dns_requests--;
-
- if (up->dns_requests == 0) {
- rspamd_upstream_update_addrs (up);
- }
-
- REF_RELEASE (up);
- }
-
- struct rspamd_upstream_srv_dns_cb {
- struct upstream *up;
- guint priority;
- guint port;
- guint requests_inflight;
- };
-
- /* Used when we have resolved SRV record and resolved addrs */
- static void
- rspamd_upstream_dns_srv_phase2_cb (struct rdns_reply *reply, void *arg)
- {
- struct rspamd_upstream_srv_dns_cb *cbdata =
- (struct rspamd_upstream_srv_dns_cb *)arg;
- struct upstream *up;
- struct rdns_reply_entry *entry;
- struct upstream_inet_addr_entry *up_ent;
-
- up = cbdata->up;
-
- if (reply->code == RDNS_RC_NOERROR) {
- entry = reply->entries;
-
- RSPAMD_UPSTREAM_LOCK (up);
- while (entry) {
-
- if (entry->type == RDNS_REQUEST_A) {
- up_ent = g_malloc0 (sizeof (*up_ent));
- up_ent->addr = rspamd_inet_address_new (AF_INET,
- &entry->content.a.addr);
- up_ent->priority = cbdata->priority;
- rspamd_inet_address_set_port (up_ent->addr, cbdata->port);
- LL_PREPEND (up->new_addrs, up_ent);
- }
- else if (entry->type == RDNS_REQUEST_AAAA) {
- up_ent = g_malloc0 (sizeof (*up_ent));
- up_ent->addr = rspamd_inet_address_new (AF_INET6,
- &entry->content.aaa.addr);
- up_ent->priority = cbdata->priority;
- rspamd_inet_address_set_port (up_ent->addr, cbdata->port);
- LL_PREPEND (up->new_addrs, up_ent);
- }
- entry = entry->next;
- }
-
- RSPAMD_UPSTREAM_UNLOCK (up);
- }
-
- up->dns_requests--;
- cbdata->requests_inflight --;
-
- if (cbdata->requests_inflight == 0) {
- g_free (cbdata);
- }
-
- if (up->dns_requests == 0) {
- rspamd_upstream_update_addrs (up);
- }
-
- REF_RELEASE (up);
- }
-
- static void
- rspamd_upstream_dns_srv_cb (struct rdns_reply *reply, void *arg)
- {
- struct upstream *upstream = (struct upstream *) arg;
- struct rdns_reply_entry *entry;
- struct rspamd_upstream_srv_dns_cb *ncbdata;
-
- if (reply->code == RDNS_RC_NOERROR) {
- entry = reply->entries;
-
- RSPAMD_UPSTREAM_LOCK (upstream);
- while (entry) {
- /* XXX: we ignore weight as it contradicts with upstreams logic */
- if (entry->type == RDNS_REQUEST_SRV) {
- msg_debug_upstream ("got srv reply for %s: %s "
- "(weight=%d, priority=%d, port=%d)",
- upstream->name, entry->content.srv.target,
- entry->content.srv.weight, entry->content.srv.priority,
- entry->content.srv.port);
- ncbdata = g_malloc0 (sizeof (*ncbdata));
- ncbdata->priority = entry->content.srv.weight;
- ncbdata->port = entry->content.srv.port;
- /* XXX: for all entries? */
- upstream->ttl = entry->ttl;
-
- if (rdns_make_request_full (upstream->ctx->res,
- rspamd_upstream_dns_srv_phase2_cb, ncbdata,
- upstream->ls->limits->dns_timeout,
- upstream->ls->limits->dns_retransmits,
- 1, entry->content.srv.target, RDNS_REQUEST_A) != NULL) {
- upstream->dns_requests++;
- REF_RETAIN (upstream);
- ncbdata->requests_inflight ++;
- }
-
- if (rdns_make_request_full (upstream->ctx->res,
- rspamd_upstream_dns_srv_phase2_cb, ncbdata,
- upstream->ls->limits->dns_timeout,
- upstream->ls->limits->dns_retransmits,
- 1, entry->content.srv.target, RDNS_REQUEST_AAAA) != NULL) {
- upstream->dns_requests++;
- REF_RETAIN (upstream);
- ncbdata->requests_inflight ++;
- }
-
- if (ncbdata->requests_inflight == 0) {
- g_free (ncbdata);
- }
- }
- entry = entry->next;
- }
-
- RSPAMD_UPSTREAM_UNLOCK (upstream);
- }
-
- upstream->dns_requests--;
- REF_RELEASE (upstream);
- }
-
- static void
- rspamd_upstream_revive_cb (struct ev_loop *loop, ev_timer *w, int revents)
- {
- struct upstream *upstream = (struct upstream *)w->data;
-
- RSPAMD_UPSTREAM_LOCK (upstream);
- ev_timer_stop (loop, w);
-
- msg_debug_upstream ("revive upstream %s", upstream->name);
-
- if (upstream->ls) {
- rspamd_upstream_set_active (upstream->ls, upstream);
- }
-
- RSPAMD_UPSTREAM_UNLOCK (upstream);
- g_assert (upstream->ref.refcount > 1);
- REF_RELEASE (upstream);
- }
-
- static void
- rspamd_upstream_resolve_addrs (const struct upstream_list *ls,
- struct upstream *upstream)
- {
- /* XXX: maybe make it configurable */
- static const gdouble min_resolve_interval = 60.0;
-
- if (upstream->ctx->res != NULL &&
- upstream->ctx->configured &&
- upstream->dns_requests == 0 &&
- !(upstream->flags & RSPAMD_UPSTREAM_FLAG_NORESOLVE)) {
-
- gdouble now = ev_now (upstream->ctx->event_loop);
-
- if (now - upstream->last_resolve < min_resolve_interval) {
- msg_info_upstream ("do not resolve upstream %s as it was checked %.0f "
- "seconds ago (%.0f is minimum)",
- upstream->name, now - upstream->last_resolve,
- min_resolve_interval);
-
- return;
- }
-
- /* Resolve name of the upstream one more time */
- if (upstream->name[0] != '/') {
- upstream->last_resolve = now;
-
- if (upstream->flags & RSPAMD_UPSTREAM_FLAG_SRV_RESOLVE) {
- if (rdns_make_request_full (upstream->ctx->res,
- rspamd_upstream_dns_srv_cb, upstream,
- ls->limits->dns_timeout, ls->limits->dns_retransmits,
- 1, upstream->name, RDNS_REQUEST_SRV) != NULL) {
- upstream->dns_requests++;
- REF_RETAIN (upstream);
- }
- }
- else {
- if (rdns_make_request_full (upstream->ctx->res,
- rspamd_upstream_dns_cb, upstream,
- ls->limits->dns_timeout, ls->limits->dns_retransmits,
- 1, upstream->name, RDNS_REQUEST_A) != NULL) {
- upstream->dns_requests++;
- REF_RETAIN (upstream);
- }
-
- if (rdns_make_request_full (upstream->ctx->res,
- rspamd_upstream_dns_cb, upstream,
- ls->limits->dns_timeout, ls->limits->dns_retransmits,
- 1, upstream->name, RDNS_REQUEST_AAAA) != NULL) {
- upstream->dns_requests++;
- REF_RETAIN (upstream);
- }
- }
- }
- }
- else if (upstream->dns_requests != 0) {
- msg_info_upstream ("do not resolve upstream %s as another request for "
- "resolving has been already issued",
- upstream->name);
- }
- }
-
- static void
- rspamd_upstream_lazy_resolve_cb (struct ev_loop *loop, ev_timer *w, int revents)
- {
- struct upstream *up = (struct upstream *)w->data;
-
- RSPAMD_UPSTREAM_LOCK (up);
- ev_timer_stop (loop, w);
-
- if (up->ls) {
- rspamd_upstream_resolve_addrs (up->ls, up);
-
- if (up->ttl == 0 || up->ttl > up->ls->limits->lazy_resolve_time) {
- w->repeat = rspamd_time_jitter (up->ls->limits->lazy_resolve_time,
- up->ls->limits->lazy_resolve_time * .1);
- }
- else {
- w->repeat = up->ttl;
- }
-
- ev_timer_again (loop, w);
- }
-
- RSPAMD_UPSTREAM_UNLOCK (up);
- }
-
- static void
- rspamd_upstream_set_inactive (struct upstream_list *ls, struct upstream *upstream)
- {
- gdouble ntim;
- guint i;
- struct upstream *cur;
- struct upstream_list_watcher *w;
-
- RSPAMD_UPSTREAM_LOCK (ls);
- g_ptr_array_remove_index (ls->alive, upstream->active_idx);
- upstream->active_idx = -1;
-
- /* We need to update all indicies */
- for (i = 0; i < ls->alive->len; i ++) {
- cur = g_ptr_array_index (ls->alive, i);
- cur->active_idx = i;
- }
-
- if (upstream->ctx) {
- rspamd_upstream_resolve_addrs (ls, upstream);
-
- REF_RETAIN (upstream);
- ntim = rspamd_time_jitter (ls->limits->revive_time,
- ls->limits->revive_time * ls->limits->revive_jitter);
-
- if (ev_can_stop (&upstream->ev)) {
- ev_timer_stop (upstream->ctx->event_loop, &upstream->ev);
- }
-
- msg_debug_upstream ("mark upstream %s inactive; revive in %.0f seconds",
- upstream->name, ntim);
- ev_timer_init (&upstream->ev, rspamd_upstream_revive_cb, ntim, 0);
- upstream->ev.data = upstream;
-
- if (upstream->ctx->event_loop != NULL && upstream->ctx->configured) {
- ev_timer_start (upstream->ctx->event_loop, &upstream->ev);
- }
- }
-
- DL_FOREACH (upstream->ls->watchers, w) {
- if (w->events_mask & RSPAMD_UPSTREAM_WATCH_OFFLINE) {
- w->func (upstream, RSPAMD_UPSTREAM_WATCH_OFFLINE, upstream->errors, w->ud);
- }
- }
-
- RSPAMD_UPSTREAM_UNLOCK (ls);
- }
-
- void
- rspamd_upstream_fail (struct upstream *upstream,
- gboolean addr_failure,
- const gchar *reason)
- {
- gdouble error_rate = 0, max_error_rate = 0;
- gdouble sec_last, sec_cur;
- struct upstream_addr_elt *addr_elt;
- struct upstream_list_watcher *w;
-
- msg_debug_upstream ("upstream %s failed; reason: %s",
- upstream->name,
- reason);
-
- if (upstream->ctx && upstream->active_idx != -1 && upstream->ls) {
- sec_cur = rspamd_get_ticks (FALSE);
-
- RSPAMD_UPSTREAM_LOCK (upstream);
- if (upstream->errors == 0) {
- /* We have the first error */
- upstream->last_fail = sec_cur;
- upstream->errors = 1;
-
- if (upstream->ls && upstream->dns_requests == 0) {
- /* Try to re-resolve address immediately */
- rspamd_upstream_resolve_addrs (upstream->ls, upstream);
- }
-
- DL_FOREACH (upstream->ls->watchers, w) {
- if (w->events_mask & RSPAMD_UPSTREAM_WATCH_FAILURE) {
- w->func (upstream, RSPAMD_UPSTREAM_WATCH_FAILURE, 1, w->ud);
- }
- }
- }
- else {
- sec_last = upstream->last_fail;
-
- if (sec_cur >= sec_last) {
- upstream->errors ++;
-
-
- DL_FOREACH (upstream->ls->watchers, w) {
- if (w->events_mask & RSPAMD_UPSTREAM_WATCH_FAILURE) {
- w->func (upstream, RSPAMD_UPSTREAM_WATCH_FAILURE,
- upstream->errors, w->ud);
- }
- }
-
- if (sec_cur - sec_last >= upstream->ls->limits->error_time) {
- error_rate = ((gdouble)upstream->errors) / (sec_cur - sec_last);
- max_error_rate = ((gdouble)upstream->ls->limits->max_errors) /
- upstream->ls->limits->error_time;
- }
-
- if (error_rate > max_error_rate) {
- /* Remove upstream from the active list */
- if (upstream->ls->ups->len > 1) {
- msg_debug_upstream ("mark upstream %s inactive; "
- "reason: %s; %.2f "
- "error rate (%d errors), "
- "%.2f max error rate, "
- "%.1f first error time, "
- "%.1f current ts, "
- "%d upstreams left",
- upstream->name,
- reason,
- error_rate,
- upstream->errors,
- max_error_rate,
- sec_last,
- sec_cur,
- upstream->ls->alive->len - 1);
- rspamd_upstream_set_inactive (upstream->ls, upstream);
- upstream->errors = 0;
- }
- else {
- msg_debug_upstream ("cannot mark last alive upstream %s "
- "inactive; reason: %s; %.2f "
- "error rate (%d errors), "
- "%.2f max error rate, "
- "%.1f first error time, "
- "%.1f current ts",
- upstream->name,
- reason,
- error_rate,
- upstream->errors,
- max_error_rate,
- sec_last,
- sec_cur);
- /* Just re-resolve addresses */
- if (sec_cur - sec_last > upstream->ls->limits->revive_time) {
- upstream->errors = 0;
- rspamd_upstream_resolve_addrs (upstream->ls, upstream);
- }
- }
- }
- else if (sec_cur - sec_last >= upstream->ls->limits->error_time) {
- /* Forget the whole interval */
- upstream->last_fail = sec_cur;
- upstream->errors = 1;
- }
- }
- }
-
- if (addr_failure) {
- /* Also increase count of errors for this specific address */
- if (upstream->addrs.addr) {
- addr_elt = g_ptr_array_index (upstream->addrs.addr,
- upstream->addrs.cur);
- addr_elt->errors++;
- }
- }
-
- RSPAMD_UPSTREAM_UNLOCK (upstream);
- }
- }
-
- void
- rspamd_upstream_ok (struct upstream *upstream)
- {
- struct upstream_addr_elt *addr_elt;
- struct upstream_list_watcher *w;
-
- RSPAMD_UPSTREAM_LOCK (upstream);
- if (upstream->errors > 0 && upstream->active_idx != -1 && upstream->ls) {
- /* We touch upstream if and only if it is active */
- msg_debug_upstream ("reset errors on upstream %s (was %ud)", upstream->name, upstream->errors);
- upstream->errors = 0;
-
- if (upstream->addrs.addr) {
- addr_elt = g_ptr_array_index (upstream->addrs.addr, upstream->addrs.cur);
- addr_elt->errors = 0;
- }
-
- DL_FOREACH (upstream->ls->watchers, w) {
- if (w->events_mask & RSPAMD_UPSTREAM_WATCH_SUCCESS) {
- w->func (upstream, RSPAMD_UPSTREAM_WATCH_SUCCESS, 0, w->ud);
- }
- }
- }
-
- RSPAMD_UPSTREAM_UNLOCK (upstream);
- }
-
- void
- rspamd_upstream_set_weight (struct upstream *up, guint weight)
- {
- RSPAMD_UPSTREAM_LOCK (up);
- up->weight = weight;
- RSPAMD_UPSTREAM_UNLOCK (up);
- }
-
- #define SEED_CONSTANT 0xa574de7df64e9b9dULL
-
- struct upstream_list*
- rspamd_upstreams_create (struct upstream_ctx *ctx)
- {
- struct upstream_list *ls;
-
- ls = g_malloc0 (sizeof (*ls));
- ls->hash_seed = SEED_CONSTANT;
- ls->ups = g_ptr_array_new ();
- ls->alive = g_ptr_array_new ();
-
- #ifdef UPSTREAMS_THREAD_SAFE
- ls->lock = rspamd_mutex_new ();
- #endif
- ls->cur_elt = 0;
- ls->ctx = ctx;
- ls->rot_alg = RSPAMD_UPSTREAM_UNDEF;
-
- if (ctx) {
- ls->limits = &ctx->limits;
- }
- else {
- ls->limits = &default_limits;
- }
-
- return ls;
- }
-
- gsize
- rspamd_upstreams_count (struct upstream_list *ups)
- {
- return ups != NULL ? ups->ups->len : 0;
- }
-
- gsize
- rspamd_upstreams_alive (struct upstream_list *ups)
- {
- return ups != NULL ? ups->alive->len : 0;
- }
-
- static void
- rspamd_upstream_dtor (struct upstream *up)
- {
- struct upstream_inet_addr_entry *cur, *tmp;
-
- if (up->new_addrs) {
- LL_FOREACH_SAFE(up->new_addrs, cur, tmp) {
- /* Here we need to free pointer as well */
- rspamd_inet_address_free (cur->addr);
- g_free (cur);
- }
- }
-
- if (up->addrs.addr) {
- g_ptr_array_free (up->addrs.addr, TRUE);
- }
-
- #ifdef UPSTREAMS_THREAD_SAFE
- rspamd_mutex_free (up->lock);
- #endif
-
- if (up->ctx) {
-
- if (ev_can_stop (&up->ev)) {
- ev_timer_stop (up->ctx->event_loop, &up->ev);
- }
-
- g_queue_delete_link (up->ctx->upstreams, up->ctx_pos);
- REF_RELEASE (up->ctx);
- }
-
- g_free (up);
- }
-
- rspamd_inet_addr_t*
- rspamd_upstream_addr_next (struct upstream *up)
- {
- guint idx, next_idx;
- struct upstream_addr_elt *e1, *e2;
-
- do {
- idx = up->addrs.cur;
- next_idx = (idx + 1) % up->addrs.addr->len;
- e1 = g_ptr_array_index (up->addrs.addr, idx);
- e2 = g_ptr_array_index (up->addrs.addr, next_idx);
- up->addrs.cur = next_idx;
- } while (e2->errors > e1->errors);
-
- return e2->addr;
- }
-
- rspamd_inet_addr_t*
- rspamd_upstream_addr_cur (const struct upstream *up)
- {
- struct upstream_addr_elt *elt;
-
- elt = g_ptr_array_index (up->addrs.addr, up->addrs.cur);
-
- return elt->addr;
- }
-
- const gchar*
- rspamd_upstream_name (struct upstream *up)
- {
- return up->name;
- }
-
- gint
- rspamd_upstream_port (struct upstream *up)
- {
- struct upstream_addr_elt *elt;
-
- elt = g_ptr_array_index (up->addrs.addr, up->addrs.cur);
- return rspamd_inet_address_get_port (elt->addr);
- }
-
- gboolean
- rspamd_upstreams_add_upstream (struct upstream_list *ups, const gchar *str,
- guint16 def_port, enum rspamd_upstream_parse_type parse_type,
- void *data)
- {
- struct upstream *upstream;
- GPtrArray *addrs = NULL;
- guint i, slen;
- rspamd_inet_addr_t *addr;
- enum rspamd_parse_host_port_result ret = RSPAMD_PARSE_ADDR_FAIL;
-
- upstream = g_malloc0 (sizeof (*upstream));
- slen = strlen (str);
-
- switch (parse_type) {
- case RSPAMD_UPSTREAM_PARSE_DEFAULT:
- if (slen > sizeof ("service=") &&
- RSPAMD_LEN_CHECK_STARTS_WITH (str, slen, "service=")) {
- const gchar *plus_pos, *service_pos, *semicolon_pos;
-
- /* Accept service=srv_name+hostname[:priority] */
- service_pos = str + sizeof ("service=") - 1;
- plus_pos = strchr (service_pos, '+');
-
- if (plus_pos != NULL) {
- semicolon_pos = strchr (plus_pos + 1, ':');
-
- if (semicolon_pos) {
- upstream->weight = strtoul (semicolon_pos + 1, NULL, 10);
- }
- else {
- semicolon_pos = plus_pos + strlen (plus_pos);
- }
-
- /*
- * Now our name is _service._tcp.<domain>
- * where <domain> is string between semicolon_pos and plus_pos +1
- * while service is a string between service_pos and plus_pos
- */
- guint namelen = (semicolon_pos - (plus_pos + 1)) +
- (plus_pos - service_pos) +
- (sizeof ("tcp") - 1) +
- 4;
- addrs = g_ptr_array_sized_new (1);
- upstream->name = ups->ctx ?
- rspamd_mempool_alloc (ups->ctx->pool, namelen + 1) :
- g_malloc (namelen + 1);
-
- rspamd_snprintf (upstream->name, namelen + 1,
- "_%*s._tcp.%*s",
- (gint)(plus_pos - service_pos), service_pos,
- (gint)(semicolon_pos - (plus_pos + 1)), plus_pos + 1);
- upstream->flags |= RSPAMD_UPSTREAM_FLAG_SRV_RESOLVE;
- ret = RSPAMD_PARSE_ADDR_RESOLVED;
- }
- }
- else {
- ret = rspamd_parse_host_port_priority (str, &addrs,
- &upstream->weight,
- &upstream->name, def_port,
- FALSE,
- ups->ctx ? ups->ctx->pool : NULL);
- }
- break;
- case RSPAMD_UPSTREAM_PARSE_NAMESERVER:
- addrs = g_ptr_array_sized_new (1);
- if (rspamd_parse_inet_address (&addr, str, strlen (str),
- RSPAMD_INET_ADDRESS_PARSE_DEFAULT)) {
- if (ups->ctx) {
- upstream->name = rspamd_mempool_strdup (ups->ctx->pool, str);
- }
- else {
- upstream->name = g_strdup (str);
- }
- if (rspamd_inet_address_get_port (addr) == 0) {
- rspamd_inet_address_set_port (addr, def_port);
- }
-
- g_ptr_array_add (addrs, addr);
- ret = RSPAMD_PARSE_ADDR_NUMERIC;
-
- if (ups->ctx) {
- rspamd_mempool_add_destructor (ups->ctx->pool,
- (rspamd_mempool_destruct_t) rspamd_inet_address_free,
- addr);
- rspamd_mempool_add_destructor (ups->ctx->pool,
- (rspamd_mempool_destruct_t) rspamd_ptr_array_free_hard,
- addrs);
- }
- }
- else {
- g_ptr_array_free (addrs, TRUE);
- }
-
- break;
- }
-
- if (ret == RSPAMD_PARSE_ADDR_FAIL) {
- g_free (upstream);
- return FALSE;
- }
- else {
- upstream->flags |= ups->flags;
-
- if (ret == RSPAMD_PARSE_ADDR_NUMERIC) {
- /* Add noresolve flag */
- upstream->flags |= RSPAMD_UPSTREAM_FLAG_NORESOLVE;
- }
- for (i = 0; i < addrs->len; i ++) {
- addr = g_ptr_array_index (addrs, i);
- rspamd_upstream_add_addr (upstream, rspamd_inet_address_copy (addr));
- }
- }
-
- if (upstream->weight == 0 && ups->rot_alg == RSPAMD_UPSTREAM_MASTER_SLAVE) {
- /* Special heuristic for master-slave rotation */
- if (ups->ups->len == 0) {
- /* Prioritize the first */
- upstream->weight = 1;
- }
- }
-
- g_ptr_array_add (ups->ups, upstream);
- upstream->ud = data;
- upstream->cur_weight = upstream->weight;
- upstream->ls = ups;
- REF_INIT_RETAIN (upstream, rspamd_upstream_dtor);
- #ifdef UPSTREAMS_THREAD_SAFE
- upstream->lock = rspamd_mutex_new ();
- #endif
- upstream->ctx = ups->ctx;
-
- if (upstream->ctx) {
- REF_RETAIN (ups->ctx);
- g_queue_push_tail (ups->ctx->upstreams, upstream);
- upstream->ctx_pos = g_queue_peek_tail_link (ups->ctx->upstreams);
- }
-
- guint h = rspamd_cryptobox_fast_hash (upstream->name,
- strlen (upstream->name), 0);
- memset (upstream->uid, 0, sizeof (upstream->uid));
- rspamd_encode_base32_buf ((const guchar *) &h, sizeof (h),
- upstream->uid, sizeof (upstream->uid) - 1, RSPAMD_BASE32_DEFAULT);
-
- msg_debug_upstream ("added upstream %s (%s)", upstream->name,
- upstream->flags & RSPAMD_UPSTREAM_FLAG_NORESOLVE ? "numeric ip" : "DNS name");
- g_ptr_array_sort (upstream->addrs.addr, rspamd_upstream_addr_sort_func);
- rspamd_upstream_set_active (ups, upstream);
-
- return TRUE;
- }
-
- void
- rspamd_upstreams_set_flags (struct upstream_list *ups,
- enum rspamd_upstream_flag flags)
- {
- ups->flags = flags;
- }
-
- void
- rspamd_upstreams_set_rotation (struct upstream_list *ups,
- enum rspamd_upstream_rotation rot)
- {
- ups->rot_alg = rot;
- }
-
- gboolean
- rspamd_upstream_add_addr (struct upstream *up, rspamd_inet_addr_t *addr)
- {
- struct upstream_addr_elt *elt;
- /*
- * XXX: slow and inefficient
- */
- if (up->addrs.addr == NULL) {
- up->addrs.addr = g_ptr_array_new_full (8, rspamd_upstream_addr_elt_dtor);
- }
-
- elt = g_malloc0 (sizeof (*elt));
- elt->addr = addr;
- g_ptr_array_add (up->addrs.addr, elt);
- g_ptr_array_sort (up->addrs.addr, rspamd_upstream_addr_sort_func);
-
- return TRUE;
- }
-
- gboolean
- rspamd_upstreams_parse_line_len (struct upstream_list *ups,
- const gchar *str, gsize len, guint16 def_port, void *data)
- {
- const gchar *end = str + len, *p = str;
- const gchar *separators = ";, \n\r\t";
- gchar *tmp;
- guint span_len;
- gboolean ret = FALSE;
-
- if (RSPAMD_LEN_CHECK_STARTS_WITH(p, len, "random:")) {
- ups->rot_alg = RSPAMD_UPSTREAM_RANDOM;
- p += sizeof ("random:") - 1;
- }
- else if (RSPAMD_LEN_CHECK_STARTS_WITH(p, len, "master-slave:")) {
- ups->rot_alg = RSPAMD_UPSTREAM_MASTER_SLAVE;
- p += sizeof ("master-slave:") - 1;
- }
- else if (RSPAMD_LEN_CHECK_STARTS_WITH(p, len, "round-robin:")) {
- ups->rot_alg = RSPAMD_UPSTREAM_ROUND_ROBIN;
- p += sizeof ("round-robin:") - 1;
- }
- else if (RSPAMD_LEN_CHECK_STARTS_WITH(p, len, "hash:")) {
- ups->rot_alg = RSPAMD_UPSTREAM_HASHED;
- p += sizeof ("hash:") - 1;
- }
-
- while (p < end) {
- span_len = rspamd_memcspn (p, separators, end - p);
-
- if (span_len > 0) {
- tmp = g_malloc (span_len + 1);
- rspamd_strlcpy (tmp, p, span_len + 1);
-
- if (rspamd_upstreams_add_upstream (ups, tmp, def_port,
- RSPAMD_UPSTREAM_PARSE_DEFAULT,
- data)) {
- ret = TRUE;
- }
-
- g_free (tmp);
- }
-
- p += span_len;
- /* Skip separators */
- if (p < end) {
- p += rspamd_memspn (p, separators, end - p);
- }
- }
-
- if (!ups->ups_line) {
- ups->ups_line = g_malloc (len + 1);
- rspamd_strlcpy (ups->ups_line, str, len + 1);
- }
-
- return ret;
- }
-
-
- gboolean
- rspamd_upstreams_parse_line (struct upstream_list *ups,
- const gchar *str, guint16 def_port, void *data)
- {
- return rspamd_upstreams_parse_line_len (ups, str, strlen (str),
- def_port, data);
- }
-
- gboolean
- rspamd_upstreams_from_ucl (struct upstream_list *ups,
- const ucl_object_t *in, guint16 def_port, void *data)
- {
- gboolean ret = FALSE;
- const ucl_object_t *cur;
- ucl_object_iter_t it = NULL;
-
- it = ucl_object_iterate_new (in);
-
- while ((cur = ucl_object_iterate_safe (it, true)) != NULL) {
- if (ucl_object_type (cur) == UCL_STRING) {
- ret = rspamd_upstreams_parse_line (ups, ucl_object_tostring (cur),
- def_port, data);
- }
- }
-
- ucl_object_iterate_free (it);
-
- return ret;
- }
-
- void
- rspamd_upstreams_destroy (struct upstream_list *ups)
- {
- guint i;
- struct upstream *up;
- struct upstream_list_watcher *w, *tmp;
-
- if (ups != NULL) {
- g_ptr_array_free (ups->alive, TRUE);
-
- for (i = 0; i < ups->ups->len; i ++) {
- up = g_ptr_array_index (ups->ups, i);
- up->ls = NULL;
- REF_RELEASE (up);
- }
-
- DL_FOREACH_SAFE (ups->watchers, w, tmp) {
- if (w->dtor) {
- w->dtor (w->ud);
- }
- g_free (w);
- }
-
- g_free (ups->ups_line);
- g_ptr_array_free (ups->ups, TRUE);
- #ifdef UPSTREAMS_THREAD_SAFE
- rspamd_mutex_free (ups->lock);
- #endif
- g_free (ups);
- }
- }
-
- static void
- rspamd_upstream_restore_cb (gpointer elt, gpointer ls)
- {
- struct upstream *up = (struct upstream *)elt;
- struct upstream_list *ups = (struct upstream_list *)ls;
- struct upstream_list_watcher *w;
-
- /* Here the upstreams list is already locked */
- RSPAMD_UPSTREAM_LOCK (up);
-
- if (ev_can_stop (&up->ev)) {
- ev_timer_stop (up->ctx->event_loop, &up->ev);
- }
-
- g_ptr_array_add (ups->alive, up);
- up->active_idx = ups->alive->len - 1;
- RSPAMD_UPSTREAM_UNLOCK (up);
-
- DL_FOREACH (up->ls->watchers, w) {
- if (w->events_mask & RSPAMD_UPSTREAM_WATCH_ONLINE) {
- w->func (up, RSPAMD_UPSTREAM_WATCH_ONLINE, up->errors, w->ud);
- }
- }
-
- /* For revive event */
- g_assert (up->ref.refcount > 1);
- REF_RELEASE (up);
- }
-
- static struct upstream*
- rspamd_upstream_get_random (struct upstream_list *ups,
- struct upstream *except)
- {
- for (;;) {
- guint idx = ottery_rand_range (ups->alive->len - 1);
- struct upstream *up;
-
- up = g_ptr_array_index (ups->alive, idx);
-
- if (except && up == except) {
- continue;
- }
-
- return up;
- }
- }
-
- static struct upstream*
- rspamd_upstream_get_round_robin (struct upstream_list *ups,
- struct upstream *except,
- gboolean use_cur)
- {
- guint max_weight = 0, min_checked = G_MAXUINT;
- struct upstream *up = NULL, *selected = NULL, *min_checked_sel = NULL;
- guint i;
-
- /* Select upstream with the maximum cur_weight */
- RSPAMD_UPSTREAM_LOCK (ups);
-
- for (i = 0; i < ups->alive->len; i ++) {
- up = g_ptr_array_index (ups->alive, i);
-
- if (except != NULL && up == except) {
- continue;
- }
-
- if (use_cur) {
- if (up->cur_weight > max_weight) {
- selected = up;
- max_weight = up->cur_weight;
- }
- }
- else {
- if (up->weight > max_weight) {
- selected = up;
- max_weight = up->weight;
- }
- }
-
- /*
- * This code is used when all upstreams have zero weight
- * The logic is to select least currently used upstream and penalise
- * upstream with errors. The error penalty should no be too high
- * to avoid sudden traffic drop in this case.
- */
- if (up->checked + up->errors * 2 < min_checked) {
- min_checked_sel = up;
- min_checked = up->checked;
- }
- }
-
- if (max_weight == 0) {
- /* All upstreams have zero weight */
- if (min_checked > G_MAXUINT / 2) {
- /* Reset all checked counters to avoid overflow */
- for (i = 0; i < ups->alive->len; i ++) {
- up = g_ptr_array_index (ups->alive, i);
- up->checked = 0;
- }
- }
-
- selected = min_checked_sel;
- }
-
- if (use_cur && selected) {
- if (selected->cur_weight > 0) {
- selected->cur_weight--;
- }
- else {
- selected->cur_weight = selected->weight;
- }
- }
-
- RSPAMD_UPSTREAM_UNLOCK (ups);
-
- return selected;
- }
-
- /*
- * The key idea of this function is obtained from the following paper:
- * A Fast, Minimal Memory, Consistent Hash Algorithm
- * John Lamping, Eric Veach
- *
- * http://arxiv.org/abs/1406.2294
- */
- static guint32
- rspamd_consistent_hash (guint64 key, guint32 nbuckets)
- {
- gint64 b = -1, j = 0;
-
- while (j < nbuckets) {
- b = j;
- key *= 2862933555777941757ULL + 1;
- j = (b + 1) * (double)(1ULL << 31) / (double)((key >> 33) + 1ULL);
- }
-
- return b;
- }
-
- static struct upstream*
- rspamd_upstream_get_hashed (struct upstream_list *ups,
- struct upstream *except,
- const guint8 *key, guint keylen)
- {
- guint64 k;
- guint32 idx;
- static const guint max_tries = 20;
- struct upstream *up = NULL;
-
- /* Generate 64 bits input key */
- k = rspamd_cryptobox_fast_hash_specific (RSPAMD_CRYPTOBOX_XXHASH64,
- key, keylen, ups->hash_seed);
-
- RSPAMD_UPSTREAM_LOCK (ups);
- /*
- * Select new upstream from all upstreams
- */
- for (guint i = 0; i < max_tries; i ++) {
- idx = rspamd_consistent_hash (k, ups->ups->len);
- up = g_ptr_array_index (ups->ups, idx);
-
- if (up->active_idx < 0 || (except != NULL && up == except)) {
- /* Found inactive or excluded upstream */
- k = mum_hash_step (k, ups->hash_seed);
- }
- else {
- break;
- }
- }
- RSPAMD_UPSTREAM_UNLOCK (ups);
-
- if (up->active_idx >= 0) {
- return up;
- }
-
- /* We failed to find any active upstream */
- up = rspamd_upstream_get_random (ups, except);
- msg_info ("failed to find hashed upstream for %s, fallback to random: %s",
- ups->ups_line, up->name);
-
- return up;
- }
-
- static struct upstream*
- rspamd_upstream_get_common (struct upstream_list *ups,
- struct upstream* except,
- enum rspamd_upstream_rotation default_type,
- const guchar *key, gsize keylen,
- gboolean forced)
- {
- enum rspamd_upstream_rotation type;
- struct upstream *up = NULL;
-
- RSPAMD_UPSTREAM_LOCK (ups);
- if (ups->alive->len == 0) {
- /* We have no upstreams alive */
- msg_warn ("there are no alive upstreams left for %s, revive all of them",
- ups->ups_line);
- g_ptr_array_foreach (ups->ups, rspamd_upstream_restore_cb, ups);
- }
- RSPAMD_UPSTREAM_UNLOCK (ups);
-
- if (ups->alive->len == 1 && default_type != RSPAMD_UPSTREAM_SEQUENTIAL) {
- /* Fast path */
- up = g_ptr_array_index (ups->alive, 0);
- goto end;
- }
-
- if (!forced) {
- type = ups->rot_alg != RSPAMD_UPSTREAM_UNDEF ? ups->rot_alg : default_type;
- }
- else {
- type = default_type != RSPAMD_UPSTREAM_UNDEF ? default_type : ups->rot_alg;
- }
-
- if (type == RSPAMD_UPSTREAM_HASHED && (keylen == 0 || key == NULL)) {
- /* Cannot use hashed rotation when no key is specified, switch to random */
- type = RSPAMD_UPSTREAM_RANDOM;
- }
-
- switch (type) {
- default:
- case RSPAMD_UPSTREAM_RANDOM:
- up = rspamd_upstream_get_random (ups, except);
- break;
- case RSPAMD_UPSTREAM_HASHED:
- up = rspamd_upstream_get_hashed (ups, except, key, keylen);
- break;
- case RSPAMD_UPSTREAM_ROUND_ROBIN:
- up = rspamd_upstream_get_round_robin (ups, except, TRUE);
- break;
- case RSPAMD_UPSTREAM_MASTER_SLAVE:
- up = rspamd_upstream_get_round_robin (ups, except, FALSE);
- break;
- case RSPAMD_UPSTREAM_SEQUENTIAL:
- if (ups->cur_elt >= ups->alive->len) {
- ups->cur_elt = 0;
- return NULL;
- }
-
- up = g_ptr_array_index (ups->alive, ups->cur_elt ++);
- break;
- }
-
- end:
- if (up) {
- up->checked ++;
- }
-
- return up;
- }
-
- struct upstream*
- rspamd_upstream_get (struct upstream_list *ups,
- enum rspamd_upstream_rotation default_type,
- const guchar *key, gsize keylen)
- {
- return rspamd_upstream_get_common (ups, NULL, default_type, key, keylen, FALSE);
- }
-
- struct upstream*
- rspamd_upstream_get_forced (struct upstream_list *ups,
- enum rspamd_upstream_rotation forced_type,
- const guchar *key, gsize keylen)
- {
- return rspamd_upstream_get_common (ups, NULL, forced_type, key, keylen, TRUE);
- }
-
- struct upstream *rspamd_upstream_get_except (struct upstream_list *ups,
- struct upstream *except,
- enum rspamd_upstream_rotation default_type,
- const guchar *key, gsize keylen)
- {
- return rspamd_upstream_get_common (ups, except, default_type, key, keylen, FALSE);
- }
-
- void
- rspamd_upstream_reresolve (struct upstream_ctx *ctx)
- {
- GList *cur;
- struct upstream *up;
-
- cur = ctx->upstreams->head;
-
- while (cur) {
- up = cur->data;
- REF_RETAIN (up);
- rspamd_upstream_resolve_addrs (up->ls, up);
- REF_RELEASE (up);
- cur = g_list_next (cur);
- }
- }
-
- gpointer
- rspamd_upstream_set_data (struct upstream *up, gpointer data)
- {
- gpointer prev_data = up->data;
- up->data = data;
-
- return prev_data;
- }
-
- gpointer
- rspamd_upstream_get_data (struct upstream *up)
- {
- return up->data;
- }
-
-
- void
- rspamd_upstreams_foreach (struct upstream_list *ups,
- rspamd_upstream_traverse_func cb, void *ud)
- {
- struct upstream *up;
- guint i;
-
- for (i = 0; i < ups->ups->len; i ++) {
- up = g_ptr_array_index (ups->ups, i);
-
- cb (up, i, ud);
- }
- }
-
- void
- rspamd_upstreams_set_limits (struct upstream_list *ups,
- gdouble revive_time,
- gdouble revive_jitter,
- gdouble error_time,
- gdouble dns_timeout,
- guint max_errors,
- guint dns_retransmits)
- {
- struct upstream_limits *nlimits;
- g_assert (ups != NULL);
-
- nlimits = rspamd_mempool_alloc (ups->ctx->pool, sizeof (*nlimits));
- memcpy (nlimits, ups->limits, sizeof (*nlimits));
-
- if (!isnan (revive_time)) {
- nlimits->revive_time = revive_time;
- }
-
- if (!isnan (revive_jitter)) {
- nlimits->revive_jitter = revive_jitter;
- }
-
- if (!isnan (error_time)) {
- nlimits->error_time = error_time;
- }
-
- if (!isnan (dns_timeout)) {
- nlimits->dns_timeout = dns_timeout;
- }
-
- if (max_errors > 0) {
- nlimits->max_errors = max_errors;
- }
-
- if (dns_retransmits > 0) {
- nlimits->dns_retransmits = dns_retransmits;
- }
-
- ups->limits = nlimits;
- }
-
- void rspamd_upstreams_add_watch_callback (struct upstream_list *ups,
- enum rspamd_upstreams_watch_event events,
- rspamd_upstream_watch_func func,
- GFreeFunc dtor,
- gpointer ud)
- {
- struct upstream_list_watcher *nw;
-
- g_assert ((events & RSPAMD_UPSTREAM_WATCH_ALL) != 0);
-
- nw = g_malloc (sizeof (*nw));
- nw->func = func;
- nw->events_mask = events;
- nw->ud = ud;
- nw->dtor = dtor;
-
- DL_APPEND (ups->watchers, nw);
- }
-
- struct upstream*
- rspamd_upstream_ref (struct upstream *up)
- {
- REF_RETAIN (up);
- return up;
- }
-
- void
- rspamd_upstream_unref (struct upstream *up)
- {
- REF_RELEASE (up);
- }
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