[MEDIUM] tcp: accept the "track-counters" in "tcp-request content" rules
Doing so allows us to track counters from backends or depending on contents.
For instance, it now becomes possible to decide to track a connection based
on a Host header if enough time is granted to parse the HTTP request. It is
also possible to just track frontend counters in the frontend and unconditionally
track backend counters in the backend without having to write complex rules.
The first track-fe-counters rule executed is used to track counters for
the frontend, and the first track-be-counters rule executed is used to track
counters for the backend. Nothing prevents a frontend from setting a track-be
rule nor a backend from setting a track-fe rule. In fact these rules are
arbitrarily split between FE and BE with no dependencies.
diff --git a/src/cfgparse.c b/src/cfgparse.c
index 19785f0..6ca7ec5 100644
--- a/src/cfgparse.c
+++ b/src/cfgparse.c
@@ -5023,6 +5023,43 @@
}
}
+ /* find the target table for 'tcp-request' layer 6 rules */
+ list_for_each_entry(trule, &curproxy->tcp_req.inspect_rules, list) {
+ struct proxy *target;
+
+ if (trule->action != TCP_ACT_TRK_FE_CTR && trule->action != TCP_ACT_TRK_BE_CTR)
+ continue;
+
+ if (trule->act_prm.trk_ctr.table.n)
+ target = findproxy(trule->act_prm.trk_ctr.table.n, 0);
+ else
+ target = curproxy;
+
+ if (!target) {
+ Alert("Proxy '%s': unable to find table '%s' referenced by track-counter.\n",
+ curproxy->id, trule->act_prm.trk_ctr.table.n);
+ cfgerr++;
+ }
+ else if (target->table.size == 0) {
+ Alert("Proxy '%s': table '%s' used but not configured.\n",
+ curproxy->id, trule->act_prm.trk_ctr.table.n ? trule->act_prm.trk_ctr.table.n : curproxy->id);
+ cfgerr++;
+ }
+ else if (trule->act_prm.trk_ctr.type != target->table.type) {
+ Alert("Proxy '%s': type of track-counters pattern not usable with type of stick-table '%s'.\n",
+ curproxy->id, trule->act_prm.trk_ctr.table.n ? trule->act_prm.trk_ctr.table.n : curproxy->id);
+ cfgerr++;
+ }
+ else {
+ free(trule->act_prm.trk_ctr.table.n);
+ trule->act_prm.trk_ctr.table.t = &target->table;
+ /* Note: if we decide to enhance the track-counters syntax, we may be able
+ * to pass a list of counters to track and allocate them right here using
+ * stktable_alloc_data_type().
+ */
+ }
+ }
+
if (curproxy->uri_auth && !(curproxy->uri_auth->flags & ST_CONVDONE) &&
!LIST_ISEMPTY(&curproxy->uri_auth->req_acl) &&
(curproxy->uri_auth->userlist || curproxy->uri_auth->auth_realm )) {