2 * services/modstack.c - stack of modules
4 * Copyright (c) 2007, NLnet Labs. All rights reserved.
6 * This software is open source.
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9 * modification, are permitted provided that the following conditions
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13 * this list of conditions and the following disclaimer.
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39 * This file contains functions to help maintain a stack of modules.
43 #include "services/modstack.h"
44 #include "util/module.h"
45 #include "util/fptr_wlist.h"
46 #include "dns64/dns64.h"
47 #include "iterator/iterator.h"
48 #include "validator/validator.h"
49 #include "respip/respip.h"
51 #ifdef WITH_PYTHONMODULE
52 #include "pythonmod/pythonmod.h"
55 #include "cachedb/cachedb.h"
58 #include "edns-subnet/subnetmod.h"
61 /** count number of modules (words) in the string */
63 count_modules(const char* s)
70 while(*s && isspace((unsigned char)*s))
72 if(*s && !isspace((unsigned char)*s)) {
75 while(*s && !isspace((unsigned char)*s))
83 modstack_init(struct module_stack* stack)
90 modstack_config(struct module_stack* stack, const char* module_conf)
93 verbose(VERB_QUERY, "module config: \"%s\"", module_conf);
94 stack->num = count_modules(module_conf);
96 log_err("error: no modules specified");
99 if(stack->num > MAX_MODULE) {
100 log_err("error: too many modules (%d max %d)",
101 stack->num, MAX_MODULE);
104 stack->mod = (struct module_func_block**)calloc((size_t)
105 stack->num, sizeof(struct module_func_block*));
107 log_err("out of memory");
110 for(i=0; i<stack->num; i++) {
111 stack->mod[i] = module_factory(&module_conf);
113 log_err("Unknown value for next module: '%s'",
121 /** The list of module names */
123 module_list_avail(void)
125 /* these are the modules available */
126 static const char* names[] = {
128 #ifdef WITH_PYTHONMODULE
144 /** func block get function type */
145 typedef struct module_func_block* (*fbgetfunctype)(void);
147 /** The list of module func blocks */
148 static fbgetfunctype*
149 module_funcs_avail(void)
151 static struct module_func_block* (*fb[])(void) = {
152 &dns64_get_funcblock,
153 #ifdef WITH_PYTHONMODULE
154 &pythonmod_get_funcblock,
157 &cachedb_get_funcblock,
160 &subnetmod_get_funcblock,
162 &respip_get_funcblock,
170 module_func_block* module_factory(const char** str)
173 const char* s = *str;
174 const char** names = module_list_avail();
175 fbgetfunctype* fb = module_funcs_avail();
176 while(*s && isspace((unsigned char)*s))
179 if(strncmp(names[i], s, strlen(names[i])) == 0) {
180 s += strlen(names[i]);
190 modstack_setup(struct module_stack* stack, const char* module_conf,
191 struct module_env* env)
195 modstack_desetup(stack, env);
196 /* fixed setup of the modules */
197 if(!modstack_config(stack, module_conf)) {
200 env->need_to_validate = 0; /* set by module init below */
201 for(i=0; i<stack->num; i++) {
202 verbose(VERB_OPS, "init module %d: %s",
203 i, stack->mod[i]->name);
204 fptr_ok(fptr_whitelist_mod_init(stack->mod[i]->init));
205 if(!(*stack->mod[i]->init)(env, i)) {
206 log_err("module init for module %s failed",
207 stack->mod[i]->name);
215 modstack_desetup(struct module_stack* stack, struct module_env* env)
218 for(i=0; i<stack->num; i++) {
219 fptr_ok(fptr_whitelist_mod_deinit(stack->mod[i]->deinit));
220 (*stack->mod[i]->deinit)(env, i);
228 modstack_find(struct module_stack* stack, const char* name)
231 for(i=0; i<stack->num; i++) {
232 if(strcmp(stack->mod[i]->name, name) == 0)