MINOR: tcp: add new "close" action for tcp-response
This new action immediately closes the connection with the server
when the condition is met. The first such rule executed ends the
rules evaluation. The main purpose of this action is to force a
connection to be finished between a client and a server after an
exchange when the application protocol expects some long time outs
to elapse first. The goal is to eliminate idle connections which
take signifiant resources on servers with certain protocols.
diff --git a/doc/configuration.txt b/doc/configuration.txt
index 37d16cb..097aa27 100644
--- a/doc/configuration.txt
+++ b/doc/configuration.txt
@@ -6718,16 +6718,15 @@
no | no | yes | yes
Arguments :
<action> defines the action to perform if the condition applies. Valid
- actions include : "accept", "reject".
- See "tcp-request connection" above for their signification.
+ actions include : "accept", "close", "reject".
<condition> is a standard layer 4-7 ACL-based condition (see section 7).
Response contents can be analysed at an early stage of response processing
called "TCP content inspection". During this stage, ACL-based rules are
evaluated every time the response contents are updated, until either an
- "accept" or a "reject" rule matches, or a TCP response inspection delay is
- set and expires with no matching rule.
+ "accept", "close" or a "reject" rule matches, or a TCP response inspection
+ delay is set and expires with no matching rule.
Most often, these decisions will consider a protocol recognition or validity.
@@ -6742,6 +6741,16 @@
or false (when used with "unless"). The first such rule executed ends
the rules evaluation.
+ - close :
+ immediately closes the connection with the server if the condition is
+ true (when used with "if"), or false (when used with "unless"). The
+ first such rule executed ends the rules evaluation. The main purpose of
+ this action is to force a connection to be finished between a client
+ and a server after an exchange when the application protocol expects
+ some long time outs to elapse first. The goal is to eliminate idle
+ connections which take signifiant resources on servers with certain
+ protocols.
+
- reject :
rejects the response if the condition is true (when used with "if")
or false (when used with "unless"). The first such rule executed ends
diff --git a/include/types/proto_tcp.h b/include/types/proto_tcp.h
index 662cde4..7f65244 100644
--- a/include/types/proto_tcp.h
+++ b/include/types/proto_tcp.h
@@ -37,6 +37,7 @@
TCP_ACT_TRK_SC1 = 5,
TCP_ACT_TRK_SC2 = 6,
TCP_ACT_TRK_SCMAX = TCP_ACT_TRK_SC0 + MAX_SESS_STKCTR - 1,
+ TCP_ACT_CLOSE, /* close at the sender's */
};
struct tcp_rule {
diff --git a/src/proto_tcp.c b/src/proto_tcp.c
index 797f335..56fa2a3 100644
--- a/src/proto_tcp.c
+++ b/src/proto_tcp.c
@@ -51,6 +51,7 @@
#include <proto/sample.h>
#include <proto/session.h>
#include <proto/stick_table.h>
+#include <proto/stream_interface.h>
#include <proto/task.h>
#ifdef CONFIG_HAP_CTTPROXY
@@ -1039,6 +1040,12 @@
s->flags |= SN_FINST_D;
return 0;
}
+ else if (rule->action == TCP_ACT_CLOSE) {
+ rep->prod->flags |= SI_FL_NOLINGER | SI_FL_NOHALF;
+ si_shutr(rep->prod);
+ si_shutw(rep->prod);
+ break;
+ }
else {
/* otherwise accept */
break;
@@ -1138,9 +1145,13 @@
arg++;
rule->action = TCP_ACT_REJECT;
}
+ else if (strcmp(args[arg], "close") == 0) {
+ arg++;
+ rule->action = TCP_ACT_CLOSE;
+ }
else {
memprintf(err,
- "'%s %s' expects 'accept' or 'reject' in %s '%s' (got '%s')",
+ "'%s %s' expects 'accept', 'close' or 'reject' in %s '%s' (got '%s')",
args[0], args[1], proxy_type_str(curpx), curpx->id, args[arg]);
return -1;
}