213 lines
4.3 KiB
C
213 lines
4.3 KiB
C
/*
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This file is part of actube.
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actube is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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libcapwap 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
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Foobar. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* @file
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* @brief Functions for modules (mods) management.
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*/
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#include <string.h>
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#include <errno.h>
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#include <dlfcn.h>
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#include "action.h"
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#include "mavl.h"
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#include "dbg.h"
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#include "log.h"
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static void (*actions_registered_cb) (struct cw_Mod * capwap, struct cw_Mod * bindings,
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struct cw_actiondef * actions) = NULL;
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void mod_set_actions_registered_cb(void (*fun)
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(struct cw_Mod *, struct cw_Mod *,
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struct cw_actiondef *))
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{
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actions_registered_cb = fun;
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}
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struct cache_item {
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const char *capwap;
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const char *bindings;
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struct cw_actiondef actions;
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struct cw_MsgSet * msgset;
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};
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static struct mavl *cache = NULL;
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static int mod_null_register_actions(struct cw_actiondef *def, int mode)
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{
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return 0;
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}
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/**
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* mod_null is a dummy mod
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*/
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struct cw_Mod mod_null = {
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.name = "none",
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.register_actions = mod_null_register_actions,
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};
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static int cmp(const void *p1, const void *p2)
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{
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struct cache_item *c1 = (struct cache_item *) p1;
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struct cache_item *c2 = (struct cache_item *) p2;
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int r;
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r = strcmp(c1->capwap, c2->capwap);
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if (r != 0)
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return r;
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return strcmp(c1->bindings, c2->bindings);
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}
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struct cw_actiondef *mod_cache_get(const char *capwap, const char *bindings)
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{
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return NULL;
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}
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struct cw_actiondef *mod_cache_add(struct conn *conn, struct cw_Mod *c, struct cw_Mod *b)
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{
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if (!cache) {
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cache = mavl_create(cmp, NULL);
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if (!cache) {
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cw_log(LOG_ERR, "Can't initialize mod cache: %s",
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strerror(errno));
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return NULL;
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}
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}
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struct cache_item s;
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s.capwap = c->name;
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s.bindings = b->name;
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struct cache_item *i = mavl_get(cache, &s);
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if (i) {
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cw_dbg(DBG_INFO, "Using cached actions for %s,%s", c->name, b->name);
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return &(i->actions);
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}
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i = malloc(sizeof(struct cache_item));
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if (!i) {
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cw_log(LOG_ERR, "Can't allocate memory for mod cache item %s",
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strerror(errno));
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return NULL;
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}
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cw_dbg(DBG_INFO, "Loading actions for %s,%s", c->name, b->name);
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memset(i, 0, sizeof(struct cache_item));
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if (c) {
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i->capwap = c->name;
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c->register_actions(&(i->actions), MOD_MODE_CAPWAP);
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}
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if (b) {
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i->bindings = b->name;
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b->register_actions(&(i->actions), MOD_MODE_BINDINGS);
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}
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if (actions_registered_cb)
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actions_registered_cb(c, b, &(i->actions));
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mavl_add(cache, i);
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return &(i->actions);
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}
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/* static mavl to store modules */
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static struct mavl * modlist = NULL;
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static int mod_cmp(const void *e1, const void *e2){
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struct cw_Mod * (*m1fn)() = e1;
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struct cw_Mod * (*m2fn)() = e2;
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return strcmp(m1fn()->name,m2fn()->name);
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}
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/**
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* @brief Load a module
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* @param name Name of the module
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* @return pointer to the module structure or NULL if the
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* module cannot be loaded.
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*/
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struct cw_Mod * cw_mod_get(const char *name)
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{
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/*int i;
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for (i=0; modlist[i];i++){
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struct cw_Mod * m = modlist[i]();
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if (strcmp(m->name,name)==0)
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return m;
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}
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return NULL;
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*/
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}
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int cw_mod_add(struct cw_Mod * (*modfn)() ){
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if (modlist == NULL){
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modlist = mavl_create(mod_cmp,NULL);
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if (modlist==NULL){
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return 0;
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}
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}
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mavl_add(modlist,modfn);
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return 1;
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}
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int cw_mod_add_dynamic(const char * path, const char * mod_name){
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char * filename = malloc(strlen(path)+strlen(mod_name)+8);
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if (!filename)
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return 0;
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strcpy(filename,path);
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strcat(filename,"/");
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strcat(filename,mod_name);
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strcat(filename,".so");
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int rc=0;
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void * handle;
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handle = dlopen(filename,RTLD_NOW);
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if (!handle){
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cw_log(LOG_ERROR,"Failed to load module: %s",dlerror());
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goto errX;
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}
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void * ifu = dlsym(handle,"mod_get_interface");
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if (!ifu){
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cw_log(LOG_ERROR,"Failed to load module: %s",dlerror());
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goto errX;
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}
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errX:
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free(filename);
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return rc;
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} |