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"
50 #ifdef WITH_PYTHONMODULE
51 #include "pythonmod/pythonmod.h"
54 #include "cachedb/cachedb.h"
57 /** count number of modules (words) in the string */
59 count_modules(const char* s)
66 while(*s && isspace((unsigned char)*s))
68 if(*s && !isspace((unsigned char)*s)) {
71 while(*s && !isspace((unsigned char)*s))
79 modstack_init(struct module_stack* stack)
86 modstack_config(struct module_stack* stack, const char* module_conf)
89 verbose(VERB_QUERY, "module config: \"%s\"", module_conf);
90 stack->num = count_modules(module_conf);
92 log_err("error: no modules specified");
95 if(stack->num > MAX_MODULE) {
96 log_err("error: too many modules (%d max %d)",
97 stack->num, MAX_MODULE);
100 stack->mod = (struct module_func_block**)calloc((size_t)
101 stack->num, sizeof(struct module_func_block*));
103 log_err("out of memory");
106 for(i=0; i<stack->num; i++) {
107 stack->mod[i] = module_factory(&module_conf);
109 log_err("Unknown value for next module: '%s'",
117 /** The list of module names */
119 module_list_avail(void)
121 /* these are the modules available */
122 static const char* names[] = {
124 #ifdef WITH_PYTHONMODULE
136 /** func block get function type */
137 typedef struct module_func_block* (*fbgetfunctype)(void);
139 /** The list of module func blocks */
140 static fbgetfunctype*
141 module_funcs_avail(void)
143 static struct module_func_block* (*fb[])(void) = {
144 &dns64_get_funcblock,
145 #ifdef WITH_PYTHONMODULE
146 &pythonmod_get_funcblock,
149 &cachedb_get_funcblock,
158 module_func_block* module_factory(const char** str)
161 const char* s = *str;
162 const char** names = module_list_avail();
163 fbgetfunctype* fb = module_funcs_avail();
164 while(*s && isspace((unsigned char)*s))
167 if(strncmp(names[i], s, strlen(names[i])) == 0) {
168 s += strlen(names[i]);
178 modstack_setup(struct module_stack* stack, const char* module_conf,
179 struct module_env* env)
183 modstack_desetup(stack, env);
184 /* fixed setup of the modules */
185 if(!modstack_config(stack, module_conf)) {
188 env->need_to_validate = 0; /* set by module init below */
189 for(i=0; i<stack->num; i++) {
190 verbose(VERB_OPS, "init module %d: %s",
191 i, stack->mod[i]->name);
192 fptr_ok(fptr_whitelist_mod_init(stack->mod[i]->init));
193 if(!(*stack->mod[i]->init)(env, i)) {
194 log_err("module init for module %s failed",
195 stack->mod[i]->name);
203 modstack_desetup(struct module_stack* stack, struct module_env* env)
206 for(i=0; i<stack->num; i++) {
207 fptr_ok(fptr_whitelist_mod_deinit(stack->mod[i]->deinit));
208 (*stack->mod[i]->deinit)(env, i);
216 modstack_find(struct module_stack* stack, const char* name)
219 for(i=0; i<stack->num; i++) {
220 if(strcmp(stack->mod[i]->name, name) == 0)