MINOR: proxy: add http_free_redirect_rule() function

Adding http_free_redirect_rule() function to free a single redirect rule
since it may be required to free rules outside of free_proxy() function.

This patch is required for an upcoming bugfix.

[for 2.2, free_proxy function did not exist (first seen in 2.4), thus
http_free_redirect_rule() needs to be deducted from haproxy.c deinit()
function if the patch is required]

include/haproxy/http_rules.h

@@ -34,6 +34,7 @@ extern struct action_kw_list http_after_res_keywords;
 struct act_rule *parse_http_req_cond(const char **args, const char *file, int linenum, struct proxy *proxy);
 struct act_rule *parse_http_res_cond(const char **args, const char *file, int linenum, struct proxy *proxy);
 struct act_rule *parse_http_after_res_cond(const char **args, const char *file, int linenum, struct proxy *proxy);
+void  http_free_redirect_rule(struct redirect_rule *rdr);
 struct redirect_rule *http_parse_redirect_rule(const char *file, int linenum, struct proxy *curproxy,
                                                const char **args, char **errmsg, int use_fmt, int dir);
 

src/http_rules.c

@@ -317,6 +317,26 @@ struct act_rule *parse_http_after_res_cond(const char **args, const char *file,
 	return NULL;
 }
 
+/* completely free redirect rule */
+void http_free_redirect_rule(struct redirect_rule *rdr)
+{
+	struct logformat_node *lf, *lfb;
+
+	if (rdr->cond) {
+		prune_acl_cond(rdr->cond);
+		free(rdr->cond);
+	}
+	free(rdr->rdr_str);
+	free(rdr->cookie_str);
+	list_for_each_entry_safe(lf, lfb, &rdr->rdr_fmt, list) {
+		LIST_DELETE(&lf->list);
+		release_sample_expr(lf->expr);
+		free(lf->arg);
+		free(lf);
+	}
+	free(rdr);
+}
+
 /* Parses a redirect rule. Returns the redirect rule on success or NULL on error,
  * with <err> filled with the error message. If <use_fmt> is not null, builds a
  * dynamic log-format rule instead of a static string. Parameter <dir> indicates

src/proxy.c

@@ -32,6 +32,7 @@
 #include <haproxy/http_ana.h>
 #include <haproxy/http_htx.h>
 #include <haproxy/http_ext.h>
+#include <haproxy/http_rules.h>
 #include <haproxy/listener.h>
 #include <haproxy/log.h>
 #include <haproxy/obj_type-t.h>
@@ -238,19 +239,7 @@ void free_proxy(struct proxy *p)
 
 	list_for_each_entry_safe(rdr, rdrb, &p->redirect_rules, list) {
 		LIST_DELETE(&rdr->list);
-		if (rdr->cond) {
-			prune_acl_cond(rdr->cond);
-			free(rdr->cond);
-		}
-		free(rdr->rdr_str);
-		free(rdr->cookie_str);
-		list_for_each_entry_safe(lf, lfb, &rdr->rdr_fmt, list) {
-			LIST_DELETE(&lf->list);
-			release_sample_expr(lf->expr);
-			free(lf->arg);
-			free(lf);
-		}
-		free(rdr);
+		http_free_redirect_rule(rdr);
 	}
 
 	list_for_each_entry_safe(log, logb, &p->logsrvs, list) {