/* * Ouroboros - Copyright (C) 2016 - 2017 * * Graph adjacency manager for IPC Process components * * Dimitri Staessens <dimitri.staessens@intec.ugent.be> * Sander Vrijders <sander.vrijders@intec.ugent.be> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #define OUROBOROS_PREFIX "complete-graph-adjacency-manager" #include <ouroboros/config.h> #include <ouroboros/logs.h> #include <ouroboros/list.h> #include <ouroboros/qos.h> #include <ouroboros/rib.h> #include "ipcp.h" #include "gam.h" #include <string.h> #include <stdlib.h> #include <assert.h> struct neighbor { struct list_head next; char * neighbor; }; struct complete { struct list_head neighbors; pthread_mutex_t neighbors_lock; pthread_t allocator; struct gam * gam; }; static void * allocator(void * o) { qosspec_t qs; ssize_t len; char ** children; ssize_t i; struct complete * complete = (struct complete *) o; assert(complete); assert(complete->gam); qs.delay = 0; qs.jitter = 0; /* FIXME: subscribe to members to keep the graph complete. */ len = rib_children("/" MEMBERS_NAME, &children); for (i = 0; i < len; ++i) { if (strcmp(children[i], ipcpi.name) < 0) gam_flow_alloc(complete->gam, children[i], qs); free(children[i]); } if (len > 0) free(children); return (void *) 0; } void * complete_create(struct gam * gam) { struct complete * complete; assert(gam); complete = malloc(sizeof(*complete)); if (complete == NULL) return NULL; list_head_init(&complete->neighbors); complete->gam = gam; if (pthread_mutex_init(&complete->neighbors_lock, NULL)) { free(complete); return NULL; } return (void *) complete; } int complete_start(void * o) { struct complete * complete = (struct complete *) o; assert(complete); assert(complete->gam); if (pthread_create(&complete->allocator, NULL, allocator, (void *) complete)) { pthread_mutex_destroy(&complete->neighbors_lock); free(complete); return -1; } /* FIXME: Handle flooding of the flow allocator before detaching.*/ pthread_join(complete->allocator, NULL); return 0; } int complete_stop(void * o) { (void) o; return 0; } void complete_destroy(void * o) { struct list_head * p = NULL; struct list_head * n = NULL; struct complete * complete = (struct complete *) o; list_for_each_safe(p, n, &complete->neighbors) { struct neighbor * e = list_entry(p, struct neighbor, next); list_del(&e->next); free(e->neighbor); free(e); } pthread_mutex_destroy(&complete->neighbors_lock); free(complete); } int complete_accept_new_flow(void * o) { (void) o; return 0; } int complete_accept_flow(void * o, qosspec_t qs, const struct cacep_info * info) { struct list_head * pos = NULL; struct neighbor * n; struct complete * complete = (struct complete *) o; (void) qs; assert(complete); pthread_mutex_lock(&complete->neighbors_lock); list_for_each(pos, &complete->neighbors) { struct neighbor * e = list_entry(pos, struct neighbor, next); if (strcmp(e->neighbor, info->name) == 0) { pthread_mutex_unlock(&complete->neighbors_lock); return -1; } assert(complete); assert(&complete->neighbors_lock); assert(pos->nxt); } n = malloc(sizeof(*n)); if (n == NULL) { pthread_mutex_unlock(&complete->neighbors_lock); return -1; } list_head_init(&n->next); n->neighbor = strdup(info->name); if (n->neighbor == NULL) { pthread_mutex_unlock(&complete->neighbors_lock); free(n); return -1; } list_add(&n->next, &complete->neighbors); pthread_mutex_unlock(&complete->neighbors_lock); return 0; }