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333939c2ee
The 'do-resolve' action is an http-request or tcp-request content action which allows to run DNS resolution at run time in HAProxy. The name to be resolved can be picked up in the request sent by the client and the result of the resolution is stored in a variable. The time the resolution is being performed, the request is on pause. If the resolution can't provide a suitable result, then the variable will be empty. It's up to the admin to take decisions based on this statement (return 503 to prevent loops). Read carefully the documentation concerning this feature, to ensure your setup is secure and safe to be used in production. This patch creates a global counter to track various errors reported by the action 'do-resolve'.
92 lines
2.6 KiB
C
92 lines
2.6 KiB
C
/*
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* include/proto/action.h
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* This file contains actions prototypes.
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*
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* Copyright (C) 2000-2010 Willy Tarreau - w@1wt.eu
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation, version 2.1
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* exclusively.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef _PROTO_ACTION_H
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#define _PROTO_ACTION_H
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#include <types/action.h>
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int act_resolution_cb(struct dns_requester *requester, struct dns_nameserver *nameserver);
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int act_resolution_error_cb(struct dns_requester *requester, int error_code);
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static inline struct action_kw *action_lookup(struct list *keywords, const char *kw)
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{
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struct action_kw_list *kw_list;
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int i;
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if (LIST_ISEMPTY(keywords))
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return NULL;
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list_for_each_entry(kw_list, keywords, list) {
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for (i = 0; kw_list->kw[i].kw != NULL; i++) {
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if (kw_list->kw[i].match_pfx &&
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strncmp(kw, kw_list->kw[i].kw, strlen(kw_list->kw[i].kw)) == 0)
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return &kw_list->kw[i];
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if (!strcmp(kw, kw_list->kw[i].kw))
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return &kw_list->kw[i];
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}
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}
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return NULL;
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}
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static inline void action_build_list(struct list *keywords,
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struct buffer *chk)
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{
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struct action_kw_list *kw_list;
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int i;
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char *p;
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char *end;
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int l;
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p = chk->area;
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end = p + chk->size - 1;
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list_for_each_entry(kw_list, keywords, list) {
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for (i = 0; kw_list->kw[i].kw != NULL; i++) {
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l = snprintf(p, end - p, "'%s%s', ", kw_list->kw[i].kw, kw_list->kw[i].match_pfx ? "(*)" : "");
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if (l > end - p)
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continue;
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p += l;
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}
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}
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if (p > chk->area)
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*(p-2) = '\0';
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else
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*p = '\0';
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}
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/* for an action ACT_ACTION_TRK_SC*, return a tracking index starting at zero
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* for SC0. Unknown actions also return zero.
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*/
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static inline int trk_idx(int trk_action)
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{
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return trk_action - ACT_ACTION_TRK_SC0;
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}
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/* Find and check the target table used by an action ACT_ACTION_TRK_*. This
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* function should be called during the configuration validity check.
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*
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* The function returns 1 in success case, otherwise, it returns 0 and err is
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* filled.
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*/
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int check_trk_action(struct act_rule *rule, struct proxy *px, char **err);
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#endif /* _PROTO_ACTION_H */
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